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CN100492060C - Optical film with resin coating comprising narrow particle size distribution organic particles - Google Patents

Optical film with resin coating comprising narrow particle size distribution organic particles Download PDF

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Publication number
CN100492060C
CN100492060C CNB2007100253128A CN200710025312A CN100492060C CN 100492060 C CN100492060 C CN 100492060C CN B2007100253128 A CNB2007100253128 A CN B2007100253128A CN 200710025312 A CN200710025312 A CN 200710025312A CN 100492060 C CN100492060 C CN 100492060C
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resin
thin film
optical thin
particle size
coated optical
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CN101153926A (en
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许龙麟
王君庭
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Eternal Optical Material Suzhou Co Ltd
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Eternal Optical Material Suzhou Co Ltd
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Abstract

The invention provides an optics film, wherein, at least one surface of base material is provided with a resin coating with concave and convex structure. The coating comprises an organic grain and a cement, wherein, the organic grain is polyacrylic acid ester resin which is polymerized by an acrylic acid ester monomer with at least one single functional base and an acrylic acid ester monomer with at least one multiple functional base and the weight occupying 30 percent to 70 percent of total weight of polymerization monomer. The organic grain has single and average grain diameter. The grain diameter distribution fall within in around 30 percent of average grain diameter. Furthermore, the organic grain relative to solid shape part quantity of the cement is that each of 100 weight part of the solid shape part of the cement contains 110 to 360 weight part organic grain. The optics film has good light diffusion effect for ray and avoids extreme diffusion of scattering of light which complies with light diffusion efficiency requirement and has excellent brightness to use the light source effectively as the diffusion film of various LCD panel backlighting moulds.

Description

Has the resin-coated optical thin film of the narrow particle size distributed organic particle of comprising
Technical field
The present invention system refers to a kind of diffusion barrier of the LCD of being used for panel backlight module especially about a kind of optical thin film, is in particular a kind of diffusion barrier with narrow particle size distributed organic particle.
Background technology
Backlight module (back light module) is one of critical component of LCD panel.Because liquid crystal itself can't be luminous voluntarily, so the major function of backlight module is to provide the light source that brightness is sufficient and be evenly distributed for liquid crystal panel, its ultimate principle is with pointolite or linear light sources commonly used, see through the area source product that succinct effectively optical facilities change into high brightness, briliancy homogeneous, provide product required backlight by this, make its normally show image.
Backlight module is broadly divided into two kinds of straight-down negative and side-light types according to its structure.Direct type backlight module is that light source is configured under the diffuser plate, is applied to larger-size display equipment usually, for example TV; Side light type back light module then is configured in light source the side of light guide plate, penetrates after making light source via light guide plate correcting direction, and it is applied to the small-size display device usually, for example mobile computer and monitor.Yet, no matter be in straight-down negative or the side light type back light module, in order effectively to eliminate the staggered or site phenomenon of light and shade, must above light guide plate or diffuser plate, diffusion barrier be set, with equalizing light rays, thereby provide uniform surface light source for the LCD panel.
Traditional diffusion barrier be on transparent base coating resin cement and the chemical particle that is used as granule proliferation to form diffusion layer, when this diffusion layer of light process, produce refraction, reflection and scattering because of refractive index is different, can effectively spread light, and then reach the effect of equalizing light rays.Yet because the influence of material itself and chemical particle will cause inevasible extinction, and it is at random to scattering of light, so can waste the part light source.
The particle diameter of the granule proliferation that this area is commonly used is generally between 1～50 micron (μ m) scope.For the coated area that increases granule proliferation in the diffusion layer to strengthen the light diffusion effect, can use the different particle of particle size as granule proliferation.As shown in Figure 1, existing diffusion barrier is to form the resinous coat 103 that comprises a plurality of particle size different particle 105 and cement 104 on base material 101, these granule proliferation 105 size distribution broads, for example, when the mean grain size of particle was about 15 μ m, particle grain size distribution often fell within the scope of about 1～30 μ m.Though use the different granule proliferation of particle size can make the effect of light diffusion more abundant, because particle grain size differs, can make scattering of light very at random, cause light source effectively to utilize.And in the middle of such coating, granule proliferation is assembled each other easily or is sticked, and not only can influence the uniformity coefficient of diffusion light, also makes display surface produce dim spot easily.
For addressing the above problem, US 7,218,450B2 uses one or more to have organic or inorganic particle that simple grain directly distributes as granule proliferation, and stick the ratio and the particle diameter of aggregated particle with ad hoc fashion control, when using two kinds of single distributed granules, the mean grain size value of these two kinds of single distributed granules also has certain control requirement.US 7,218, and in the employed single distributed granule of 450B2,95% particle grain size is to drop within the scope of its mean grain size ± 15%.US 7,218, and 450B2 is teaching also, should use the narrower granule proliferation of particle size distribution range, but it does not discussed at the degree of crosslinking of granule proliferation.In fact, the degree of crosslinking deficiency of granule proliferation will cause some inevasible problems.Say it for example, the low particle of degree of crosslinking easily with cement in solvent action generation swelling (swelling) phenomenon, therefore, than the high particle of degree of crosslinking, the solvent resistance of the particle that degree of crosslinking is low is lower; Moreover, the particle that degree of crosslinking is low causes volume change because of lyosorption, will cause the optical property instability of particle, and the surface of particle also produces and increases glutinous phenomenon, easily make between particle and the particle to produce cohesion, so the coating processability that influences diffusion barrier with and the light diffusion effect.
In addition, in various blooming pieces, the concentration piece price is higher relatively, therefore in the backlight modular structure of new development, in order to reduce cost, tends to do to change to replace concentration piece in other blooming piece and combination thereof.As with LCD monitor, be that the design with two or three diffusion barriers replaces previous concentration piece and its design of each a slice diffusion barrier up and down, but the briliancy of this way and other product usefulness can not be compared with original design.So with present technology, the design focal point of diffusion barrier not only is how to reach the requirement that meets the light diffuser efficiency, more need further consider the briliancy that how to improve diffusion barrier.
Summary of the invention
The purpose of this invention is to provide a kind of optical thin film that the requirement of light diffuser efficiency has good briliancy simultaneously that meets, this optical thin film has the resinous coat that comprises narrow particle size distributed organic particle, can effectively solve the problems referred to above that prior art exists, adapt to the growth requirement of LCD panel backlight modular structure.
Technical solution of the present invention is, has the resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, comprise a base material, at least one surface of base material comprises the resinous coat with concaveconvex structure, this resinous coat comprises a plurality of organic granulars and cement, its characteristics are: described organic granular is a polyacrylate resin, this resin is polymerized via the acrylic ester monomer of at least a monofunctional and the acrylic ester monomer of at least a multiple functional radical, and wherein the acrylic ester monomer of all multiple functional radicals accounts for polymerization single polymerization monomer general assembly (TW) 30～70%; Described organic granular has single mean grain size, and its size distribution falls within mean grain size ± 30% scope; And described organic granular is that per 100 weight portion cement solids contain the organic granular of 110～360 weight portions with respect to the amount of described cement solid.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, the size distribution of the organic granular that described resinous coat comprised falls within mean grain size ± 15% scope.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, the mean grain size of described organic granular is 5～30 microns.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, the mean grain size of described organic granular is 8～20 microns.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described organic granular is that per 100 weight portion cement solids contain the organic granular of 120～250 weight portions with respect to the amount of described cement solid.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described resin-coated thickness is 5～30 microns.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, the acrylic ester monomer of described monofunctional is, methyl methacrylate, butyl methacrylate, the 2-phenoxyethyl acrylate, ethoxyquin 2-phenoxyethyl acrylate, 2-(2-ethoxy ethoxy) ethyl propylene acid esters, ring trimethylolpropane dimethoxym ethane acrylate, β-propyloic acrylic ester, the lauric acid methacrylate, isooctyl acrylate, the stearic acid methacrylate, the isodecyl acrylate, the isobornyl methacrylate, the benzyl acrylate, 2-hydroxyethyl methacrylate phosphate, methacrylate, hydroxy-ethyl acrylate, methacrylic acid-2-hydroxy methacrylate, or two or more potpourri in the middle of the above-mentioned substance.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, the acrylic ester monomer of described multiple functional radical is, 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate, ethoxyquin 1, the 6-hexanediyl ester, propylene glycol diacrylate, tristane dimethanol diacrylate, the ethoxyquin propylene glycol diacrylate, neopentylglycol diacrylate, the third oxidation neopentylglycol diacrylate, the ethoxyquin bisphenol a dimethacrylate, the 2-methyl isophthalic acid, the ammediol diacrylate, ethoxyquin-2-methyl isophthalic acid, the ammediol diacrylate, 2-butyl-2-ethyl-1, the ammediol diacrylate, ethylene glycol dimethacrylate, the diethylene glycol dimethylacrylate, three (2-hydroxyethyl) isocyanic acid triacrylate, pentaerythritol triacrylate, the ethoxyquin trimethylolpropane triacrylate, the third oxidation trimethylolpropane triacrylate, trimethylol-propane trimethacrylate, tetramethylol methane tetraacrylate, the ethoxyquin tetramethylol methane tetraacrylate, two-trimethylolpropane tetra-acrylate, the third oxidation tetramethylol methane tetraacrylate, tetramethylol methane tetraacrylate, dipentaerythritol acrylate, the tripropylene glycol dimethylacrylate, 1, the 4-butanediol dimethylacrylate, 1, the 6-hexanediol dimethacrylate, allylation dimethacrylate cyclohexyl, the dimethacrylate isocyanates, the ethoxylated trimethylolpropane trimethyl acrylic ester, the propoxylated glycerol trimethyl acrylic ester, trimethylol-propane trimethacrylate, three (propylene oxygen ethyl) isocyanates, or two or more potpourri in the middle of the above-mentioned substance.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described polyacrylate resin is to be formed by methyl methacrylate and these two kinds of monomer polymerizations of ethylene glycol dimethacrylate.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, a surface of base material comprises resinous coat, another surface of base material has an adherence and prevents layer, and this adherence prevents that layer from comprising a plurality of organic granulars and cement.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described adherence prevents that the mean grain size of the organic granular that layer is comprised from being 1 micron～10 microns.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described adherence prevents that the size distribution of the organic granular that layer is comprised from falling within mean grain size ± 30% scope.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described adherence prevents that layer organic granular that is comprised from being that per 100 weight portion cement solids contain the organic granular of 0.1～5 weight portion with respect to the amount of cement solid.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described adherence prevents that the thickness of layer from being 5～10 microns.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described adherence prevents that the organic granular that layer is comprised from being polyacrylate resin.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described polyacrylate resin is to be formed by methyl methacrylate and these two kinds of monomer polymerizations of ethylene glycol dimethacrylate.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, in total monomer weight, the consumption of described ethylene glycol dimethacrylate is 30～70%.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described base material is polyethylene terephthalate resin, polymethacrylate resin, polycarbonate resin, polystyrene resin, poly-cyclic olefin resins, polyolefin resin, polyurethane resin, Triafol T, polyimide resin, vibrin, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described base material is polyethylene terephthalate resin, polymethacrylate resin, poly-cyclic olefin resins, Triafol T, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described resinous coat or adherence prevent that the cement that comprised of layer from being ultraviolet hardening resin, thermoset resin, thermoplastic resin, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described cement is a ultraviolet hardening resin, and other adds thermoset resin or thermoplastic resin or adds thermoset resin and thermoplastic resin simultaneously.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described ultraviolet hardening resin is polymerized via at least a acrylic monomer or acrylic ester monomer with one or more functional groups.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described acrylic ester monomer is, methacrylate, acrylate, amido formate acrylate, polyester acrylate, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described ultraviolet hardening resin further comprises the acrylic ester oligomer.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described thermoset resin is, the vibrin, epoxy resin, polymethacrylate resin, polyamide resin, fluoroplast, polyimide resin, polyurethane resin, the alkyd resin that contain hydroxyl and/or carboxyl, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described thermoplastic resin is vibrin, polymethacrylate resin, or their potpourri.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described resinous coat or adherence prevent that layer from also containing one or more adjuvants, and described adjuvant comprises leveling agent, stabilization agent, antistatic agent, rigidizer, fluorescent bleaches, light initiator, ultraviolet light absorber, inorganic particles.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described antistatic agent is ethoxy fatty acid glyceride class, quaternary ammonium compound compound, fatty amine analog derivative, polyethylene oxide, siloxane and alcohol derivatives, or two or more potpourri in the middle of them.
Further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and wherein, described rigidizer is a polyisocyanate.
Again further, above-mentioned have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, wherein, described inorganic particles is zinc paste, strontium titanates, zirconia, aluminium oxide, titania, calcium sulphate, barium sulphate, lime carbonate, or two or more potpourri in the middle of them.
Description by above technical scheme can be found, outstanding substantive distinguishing features and marked improvement of the present invention is embodied in: because the diffusion particle in the middle of the substrate coating adopts the polyacrylate resin particle, its particle diameter is single distribution, narrow size distribution, they had both had good diffusion effect to light, can as present technology, not make scattering of light very at random again, thereby guarantee that optical thin film of the present invention meets the requirement of light diffuser efficiency and has good briliancy, is effectively used light source.And, polyacrylate resin of the present invention is to be polymerized by the acrylic ester monomer of at least a monofunctional and the acrylic ester monomer of at least a multiple functional radical, its degree of crosslinking height is difficult for assembling each other or sticking, and can not influence the uniformity coefficient of diffusion light.This particle has solvent resistance, can avoid producing the optical property instability that the swelling phenomenon makes film because of organic granular.Moreover along with the raising of organic granular degree of crosslinking, its hardness also is improved, and the optical thin film of making has good scratch resistance and fastness to rubbing, for its application under various occasions provides reliable assurance.
Description of drawings
Fig. 1 is the synoptic diagram of the diffusion barrier of prior art;
Fig. 2 is the synoptic diagram of optical thin film of the present invention;
Fig. 3 is another synoptic diagram of optical thin film of the present invention;
Fig. 4 is the instantiation synoptic diagram of optical thin film of the present invention in conjunction with light guide plate or diffusion barrier;
Fig. 5 is optical thin film of the present invention another instantiation synoptic diagram in conjunction with light guide plate or diffusion barrier;
Fig. 6 is the again instantiation synoptic diagram of optical thin film of the present invention in conjunction with light guide plate or diffusion barrier;
Fig. 7 is the instantiation synoptic diagram of optical thin film of the present invention in conjunction with light guide plate or diffusion barrier and concentration piece;
Fig. 8 is the synoptic diagram of backlight module.
More than among each figure, the implication of Reference numeral is as follows:
1 reflectance coating
3 diffusion barriers
4 and 5 concentration pieces
6 protection diffusion barriers
101 base materials
103 resinous coats
104 cements
105 particles
201 and 301 base materials
203 and 303 resinous coats
204,304 and 314 cements
205,305 and 315 organic granulars
313 adherences prevent layer
500 light guide plate or diffuser plate
600 concentration pieces
Embodiment
At the deficiency that prior art exists, the present inventor develops a kind of resin-coated optical thin film of the narrow particle size distributed organic particle of comprising that has through further investigation.This optical thin film can be used as the diffusion barrier of various LCD panel backlight modules, satisfies the request for utilization of light diffuser efficiency and briliancy two aspects simultaneously, makes light source be able to fully and effectively utilize.
As shown in Figure 2, optical thin film of the present invention comprises a base material 201, and at least one surface coated of this base material has the resinous coat 203 of concaveconvex structure, with as light diffusion layer.Above-mentioned resinous coat comprises a plurality of organic granulars 205 and cement 204, and organic granular 205 with respect to the amount of cement 204 solids is: per 100 weight portion cement solids, join the organic granular of 110～360 weight portions approximately.
The employed base material 201 of optical thin film of the present invention can be any the technical field of the invention and has and know the known person of the knowledgeable, for example glass or plastics usually.Above-mentioned plastic basis material there is no particular restriction, include but not limited to: vibrin (polyester resin), as polyethylene terephthalate (polyethylene terephthalate, PET) or Polyethylene Naphthalate (polyethylenenaphthalate, PEN); Polymethacrylate resin (polymethacrylate resin), as polymethylmethacrylate (polymethyl methacrylate, PMMA); Polyimide resin (polyimide resin); Polystyrene resin (polystyrene resin); Poly-cyclic olefin resins (polycycloolefin resin); Polyolefin resin (polycycloolefin resin); Polycarbonate resin (polycarbonate resin); Polyurethane resin (polyurethane resin); Triafol T (triacetate cellulose, TAC); Or the potpourri of above-mentioned these materials.Wherein preferred: polyethylene terephthalate, polymethylmethacrylate, poly-cyclic olefin resins, Triafol T or its potpourri; More preferably: polyethylene terephthalate.The thickness of base material depend on usually the demand of the optical articles desiring to make, generally approximately between 16 μ m～250 μ m.
For reaching the light diffusion effect, must be at a surface coated resinous coat 203 of base material 201.This resinous coat 203 contains organic granular 205 and cement 204, organic granular 205 is a polymethacrylate resin, its acrylic ester monomer that comprises the acrylic ester monomer of at least a monofunctional and at least a multiple functional radical is as polymerized unit, and wherein the acrylic ester monomer of all multiple functional radicals accounts for 30～70% of total monomer weight.The present invention uses at least a monomer with multiple functional radical, makes to carry out cross-linking reaction between monomer, to increase the degree of crosslinking of prepared organic particle.By this, can increase the hardness of organic granular 205, promote its scratch resistance fastness to rubbing, improve the solvent resistance of particle simultaneously cement 204.
The acrylic ester monomer that is applicable to monofunctional of the present invention can be selected from, but be not limited to following group: methyl methacrylate (methyl methacrylate, MMA), butyl methacrylate, 2-phenoxyethyl acrylate (2-phenoxy ethyl acrylate), ethoxyquin 2-phenoxyethyl acrylate (ethoxylated 2-phenoxy ethyl acrylate), 2-(2-ethoxy ethoxy) ethyl propylene acid esters (2-(2-ethoxyethoxy) ethyl acrylate), ring trimethylolpropane dimethoxym ethane acrylate (cyclic trimethylolpropane formal acrylate), β-propyloic acrylic ester (β-carboxyethyl acrylate), lauric acid methacrylate (laurylmethacrylate), isooctyl acrylate (isooctyl acrylate), stearic acid methacrylate (stearyl methacrylate), isodecyl acrylate (isodecyl acrylate), isobornyl methacrylate (isoborny methacrylate), benzyl acrylate (benzylacrylate), 2-hydroxyethyl methacrylate phosphate (2-hydroxyethyl metharcrylatephosphate), hydroxy-ethyl acrylate (hydroxyethyl acrylate, HEA), methacrylic acid-2-hydroxy methacrylate (2-hydroxyethyl methacrylate, HEMA) and composition thereof.
The acrylic ester monomer that is applicable to multiple functional radical of the present invention can be selected from, but be not limited to following group: 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate (hydroxypivalyl hydroxypivalate diacrylate), ethoxyquin 1, (ethoxylated 1 for the 6-hexanediyl ester, 6-hexanediol diacrylate), propylene glycol diacrylate (dipropylene glycol diacrylate), tristane dimethanol diacrylate (Tricyclodecane dimethanol diacrylate), ethoxyquin propylene glycol diacrylate (ethoxylated dipropylene glycol diacrylate), neopentylglycol diacrylate (neopentyl glycol diacrylate), the third oxidation neopentylglycol diacrylate (propoxylatedneopentyl glycol diacrylate), ethoxyquin bisphenol a dimethacrylate (ethoxylatedbisphenol-A dimethacrylate), the 2-methyl isophthalic acid, ammediol diacrylate (2-methyl-1,3-propanediol diacrylate), ethoxyquin-2-methyl isophthalic acid, ammediol diacrylate (ethoxylated 2-methyl-1,3-propanediol diacrylate), 2-butyl-2-ethyl-1, ammediol diacrylate (2-butyl-2-ethyl-1,3-propanediol diacrylate), ethylene glycol dimethacrylate (ethylene glycol dimethacrylate; EGDMA), diethylene glycol dimethylacrylate (diethylene glycol dimethacrylate), three (2-hydroxyethyl) isocyanic acid triacrylate (Tris (2-hydroxy ethyl) isocyanurate triacrylate), pentaerythritol triacrylate (pentaerythritol triacrylate), ethoxyquin trimethylolpropane triacrylate (ethoxylated trimethylolpropane triacrylate), the third oxidation trimethylolpropane triacrylate (propoxylated trimethylolpropane triacrylate), trimethylol-propane trimethacrylate (trimethylolpropane trimethacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), ethoxyquin tetramethylol methane tetraacrylate (ethoxylatedpentaerythritol tetraacrylate), two-trimethylolpropane tetra-acrylate (ditrimethylolpropane tetraacrylate), the third oxidation tetramethylol methane tetraacrylate (propoxylated pentaerythritol tetraacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), dipentaerythritol acrylate (dipentaerythritolhexaacrylate), tripropylene glycol dimethylacrylate (tripropylene glycoldimethacrylate), 1,4-butanediol dimethylacrylate (1,4-butanedioldimethacrylate), 1, the 6-hexanediol dimethacrylate (1,6-hexanedioldimethacrylate), allylation dimethacrylate cyclohexyl (allylated cyclohexyldimethacrylate), dimethacrylate isocyanates (isocyanurate dimethacrylate), ethoxylated trimethylolpropane trimethyl acrylic ester (ethoxylated trimethylol propanetri-methacrylate), propoxylated glycerol trimethyl acrylic ester (propoxylated glyceroltri-methacrylate), trimethylol-propane trimethacrylate (trimethylol propanetri-methacrylate), three (propylene oxygen ethyl) isocyanates (tris (acryloxyethyl) isocyanurate) and composition thereof.
According to a better embodiment of the present invention, the organic granular 205 that is comprised in the resinous coat 203 is by the polyacrylate resin particle that monomer constituted that comprises methyl methacrylate and ethylene glycol dimethacrylate, wherein the weight ratio of methyl methacrylate monomer and ethylene glycol dimethacrylate monomer can be 70:30,60:40,50:50,40:60 or 30:70 etc., consumption when the ethylene glycol dimethacrylate monomer, weight consumption with total monomer calculates, be about at 30～70% o'clock, its degree of crosslinking is preferable.
According to the present invention, the shape of the organic granular 205 that is comprised in the resinous coat 203 there is no particular restriction, for example can be spheroidal, oval sphere or irregular shape etc., is preferably spheroidal.These organic granulars have single mean grain size, and are generally between about 5 microns to about 30 microns, preferable between about 8 microns to about 20 microns, more preferably, have about 8,10,12,15,18 or 20 microns mean grain size.Above-mentioned organic granular has the light scatter effect.In order to improve the briliancy of optical thin film, organic granular used in the present invention has narrow size distribution, and its size distribution drops within about ± 30% scope of mean grain size, preferably, drops in about ± 15% scope of mean grain size.For example, according to the present invention, when using mean grain size to be about organic granular in pact ± 30% scope that 15 microns and size distribution drop on this mean grain size, the size distribution system of the organic granular in this resinous coat falls within about 10.5 microns extremely in about 19.5 microns scope.Use mean grain size to fall within about 1 organic granular than known technology to about 30 micrometer ranges for about 15 microns and size distribution, organic granular of the present invention not only has single mean grain size value, and particle size distribution range is narrow, so the present invention can avoid wasting because of the organic granular size has big difference, makes the excessive light source that causes of light scatter scope, so can improve the briliancy of optical thin film.
As described earlier in this article, in resinous coat of the present invention, organic granular with respect to the amount of cement solid is: per 100 weight portion cement solids, join the organic granular of 110～360 weight portions approximately; Preferably, per 100 weight portion cement solids are joined the organic granular of 120～250 weight portions approximately.For the distribution of organic granular in resinous coat, the present invention there is no particular restriction, but preferably, as shown in Figure 2, organic granular is individual layer and evenly distributes.Because individual layer evenly distributes except reducing the raw materials cost, can also reduce the light source waste, and then promote the briliancy of optical thin film.
Be used in cement of the present invention, owing to must allow light see through, it is preferably water white transparency person.Cement of the present invention can be selected from the group that is made of ultraviolet hardening resin, thermoset resin (thermalsetting resin), thermoplastic resin (thermal plastic resin) and composition thereof, and optionally be heating and curing, ultraviolet curing or heating handle with the two curing of ultraviolet ray (dualcuring) modes, to form resinous coat of the present invention.To this, a kind of embodiment of the present invention is, for the hardness that strengthens coating and prevent film warpage (warp), the cement that uses comprises ultraviolet hardening resin, and the resin of from the group that thermoset resin, thermoplastic resin and composition thereof are formed, selecting, and handle by heating and two (dual curing) modes of solidifying of ultraviolet ray, make the resinous coat of formation have remarkable thermotolerance and minimum volumetric shrinkage (shrinkage).
Can be used for ultraviolet hardening resin resin system of the present invention and constituted, be preferably acrylic ester monomer by comprising at least a acrylic monomer or acrylic ester monomer with one or more functional groups.Can be used for the acrylic ester monomer among the present invention, include but not limited to: methacrylate monomers, acrylate monomer, amido formate acrylate (urethane acrylate) monomer, polyester acrylate (polyester acrylate) monomer or epoxy acrylate (epoxyacrylate) monomer etc. are preferably acrylate monomer.
For example, the acrylic ester monomer that is applicable to ultraviolet hardening resin of the present invention can be selected from and comprise: methyl methacrylate, butyl acrylate, 2-phenoxyethyl acrylate (2-phenoxyethyl acrylate), ethoxyquin 2-phenoxyethyl acrylate (ethoxylated 2-phenoxyethyl acrylate), 2-(2-ethoxy ethoxy) ethyl propylene acid esters (2-(2-ethoxyethoxy) ethyl acrylate), ring trimethylolpropane dimethoxym ethane acrylate (cyclictrimethylolpropane formal acrylate), β-propyloic acrylic ester (β-carboxyethylacrylate), lauric acid methacrylate (lauryl methacrylate), isooctyl acrylate (isooctyl acrylate), stearic acid methacrylate (stearyl methacrylate), isodecyl acrylate (isodecyl acrylate), isobornyl methacrylate (isobomymethacrylate), benzyl acrylate (benzyl acrylate), 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate (hydroxypivalyl hydroxypivalatediacrylate), ethoxyquin 1, (ethoxylated 1 for the 6-hexanediyl ester, 6-hexanedioldiacrylate), propylene glycol diacrylate (dipropylene glycol diacrylate), tristane dimethanol diacrylate (Tricyclodecane dimethanol diacrylate), ethoxyquin propylene glycol diacrylate (ethoxylated dipropylene glycol diacrylate), neopentylglycol diacrylate (neopentyl glycol diacrylate), the third oxidation neopentylglycol diacrylate (propoxylated neopentyl glycol diacrylate), ethoxyquin bisphenol a dimethacrylate (ethoxylated bisphenol-A dimethacrylate), the 2-methyl isophthalic acid, ammediol diacrylate (2-methyl-1,3-propanediol diacrylate), ethoxyquin-2-methyl isophthalic acid, ammediol diacrylate (ethoxylated 2-methyl-1,3-propanediol diacrylate), 2-butyl-2-ethyl-1, ammediol diacrylate (2-butyl-2-ethyl-1,3-propanediol diacrylate), ethylene glycol dimethacrylate (ethylene glycol dimethacrylate), diethylene glycol dimethylacrylate (diethylene glycol dimethacrylate), 2-hydroxyethyl methacrylate phosphate (2-hydroxyethyl metharcrylate phosphate), three (2-hydroxyethyl) isocyanic acid triacrylate (Tris (2-hydroxy ethyl) isocyanurate triacrylate), pentaerythritol triacrylate (pentaerythritol triacrylate), ethoxyquin trimethylolpropane triacrylate (ethoxylated trimethylolpropane triacrylate), the third oxidation trimethylolpropane triacrylate (propoxylated trimethylolpropane triacrylate), trimethylol-propane trimethacrylate (trimethylolpropane trimethacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), ethoxyquin tetramethylol methane tetraacrylate (ethoxylatedpentaerythritol tetraacrylate), two-trimethylolpropane tetra-acrylate (ditrimethylolpropane tetraacrylate), the third oxidation tetramethylol methane tetraacrylate (propoxylated pentaerythritol tetraacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), dipentaerythritol acrylate (dipentaerythritolhexaacrylate), hydroxy-ethyl acrylate (hydroxyethyl acrylate, HEA), methacrylic acid-2-hydroxy methacrylate (2-hydroxyethyl methacrylate, HEMA), tripropylene glycol dimethylacrylate (tripropylene glycol dimethacrylate), 1,4-butanediol dimethylacrylate (1,4-butanediol dimethacrylate), 1,6-hexanediol dimethacrylate (1,6-hexanediol dimethacrylate), allylation dimethacrylate cyclohexyl (allylated cyclohexyl dimethacrylate), dimethacrylate isocyanates (isocyanurate dimethacrylate), ethoxylated trimethylolpropane trimethyl acrylic ester (ethoxylated trimethylol propane tri-methacrylate), propoxylated glycerol trimethyl acrylic ester (propoxylated glycerol tri-methacrylate), trimethylol-propane trimethacrylate (trimethylol propane tri-methacrylate), the group that the potpourri of three (propylene oxygen ethyl) isocyanates (tris (acryloxyethyl) isocyanurate) and these materials is formed.Preferably, this acrylic ester monomer comprises: dipentaerythritol acrylate, trimethylolpropane triacrylate and pentaerythritol triacrylate.
For increasing resin-coated film forming, ultraviolet hardening resin used in the present invention can optionally comprise molecular weight between about 10 3To about 10 4Oligomer, this type of oligomerization system is familiar with the personage institute well known of this technology, acrylic ester oligomer for example, specifically include but not limited to: the amido formate acrylate, as fatty amine carbamate acrylate (aliphatic urethaneacrylate), fatty amine carbamate six acrylate (aliphatic urethanehexaacrylate), aromatic amine carbamate six acrylate (aromatic urethanehexaacrylate); Epoxy acrylate is as bisphenol-A epoxy diacrylate (bisphenol-Aepoxy diacrylate), phenolic aldehyde epoxy acrylate (novolac epoxy acrylate); Polyester acrylate is as polyester diacrylate (polyester diacrylate); Or pure acrylic acid ester.
Can be used for thermoset resin of the present invention, its mean molecular weight is generally between about 10 4To about 2 * 10 6Between, preferable between about 2 * 10 4To about 3 * 10 5Between, better for about 4 * 10 4To about 10 5Between.Thermoset resin of the present invention is optional from containing carboxyl (COOH) and/or the hydroxyl (group that vibrin OH), epoxy resin, polymethacrylate resin, polyamide resin, fluoroplast, polyimide resin, polyurethane resin, alkyd resin (alkyd resin) and composition thereof are formed, be preferably contain carboxyl (COOH) and/or hydroxyl (polymethacrylate resin OH) or polyacrylate resin are as the polymethylacrylic acid polyol resin.
Can be used for thermoplastic resin of the present invention can be selected from: vibrin; Polymethacrylate resin is as polymethylmethacrylate (PMMA); And composition thereof the group that formed.
The employed resinous coat of optical thin film of the present invention, its thickness depends on the demand of the optical articles of wishing to get usually, and is between general about 5 microns to about 30 microns, preferable between about 10 microns to about 25 microns
Resinous coat of the present invention, except that comprise organic granular and cement, also can comprise any persond having ordinary knowledge in the technical field of the present invention's known additives as required, include but not limited to: leveling agent, stabilization agent, antistatic agent, rigidizer, fluorescent bleaches, light initiator, ultraviolet light absorber or inorganic particles.
Can be used in antistatic agent of the present invention and there is no particular restriction, it is persond having ordinary knowledge in the technical field of the present invention institute well known, for example: ethoxy fatty acid glyceride class, quaternary ammonium compound compound, fatty amine analog derivative, epoxy resin (as polyethylene oxide), siloxane (siloxane) or other alcohol derivatives, as poly-ethanol ester, polyglycol ether etc.
Can be used for rigidizer of the present invention (Curing Agent) is persond having ordinary knowledge in the technical field of the present invention institute well known, it can produce molecule and intermolecular chemical bond with cement and form crosslinked (Crosslinking), for example: polyisocyanate (Polyisocyanate).When resinous coat of the present invention comprises rigidizer, can optionally select for use and contain hydroxyl (OH), carboxyl (COOH) or amido (NH 2) monomer, preferably contain the monomer of hydroxyl.Prepare organic granular of the present invention, make organic granular contain surface functionalities, can be directly and the rigidizer reagentia in the resinous coat, increase adherence, reduce the consumption of cement, promote the briliancy of optical thin film.The above-mentioned instantiation that contains the monomer of hydroxyl, such as but not limited to: hydroxy-ethyl acrylate (hydroxyethylacrylate, HEA), hydroxypropyl acrylate (hydroxypropyl acrylate, HPA), methacrylic acid-2-hydroxy methacrylate (2-hydroxyethyl methacrylate, HEMA), hydroxy propyl methacrylate (hydroxypropyl methacrylate, or their potpourri HPMA).
Can be used for fluorescent bleaches of the present invention, there is no particular restriction, it is persond having ordinary knowledge in the technical field of the present invention institute well known, it can be organism, includes but not limited to: the two triazines (diphenylethylene bistriazines) of benzoxazoles class (benzoxazoles), benzimidazole (benzimidazoles) or talan; Or inorganics, for example zinc sulphide.
Can be used for ultraviolet light absorber of the present invention, be persond having ordinary knowledge in the technical field of the present invention institute well known, for example: benzotriazole (benzotriazoles), phentriazine class (benzotriazines), Benzophenone class (benzophenones) or salicyclic acid derivatives (salicylicacid derivatives) etc.
Smooth initiator used in the present invention means the transmission initiated polymerization person that can produce free radical and see through free radical after rayed.Be applicable to that smooth initiator of the present invention there is no particular restriction, preferred: benzophenone, perhaps 1-hydroxycyclohexylphenylketone.
In addition, when base material is plastic basis material, for avoiding the plastic basis material yellow, can in resinous coat, add the inorganic particles that tool absorbs ultraviolet ability, for example: zinc paste, strontium titanates, zirconia, aluminium oxide, titania, calcium sulphate, barium sulphate, lime carbonate or its potpourri are preferably titania, zirconia, aluminium oxide, zinc paste or its potpourri.The particle diameter of inorganic particles be generally about 1 to about 100 nanometers (nanometer nm), is preferably about 20 nanometers to about 50 nanometers.
For improving diffusion effect, avoid other assembly of optical thin film of the present invention and backlight module to produce suction-operated, optical thin film of the present invention can apply an adherence if necessary in the opposite side of base material and prevent layer, and its thickness is about 1 μ m between about 10 μ m.As shown in Figure 3, in another embodiment of the present invention, one side of base material 301 has the resinous coat 303 that comprises a plurality of organic granulars 305 and cement 304, and opposite side has the adherence that comprises a plurality of organic granulars 315 and cement 314 and prevents layer 313.
Be applicable to adherence prevent layer in 313 cement 314 and the kind of organic granular 315, similar with the cement 304 and the organic granular 305 of 303 li of resinous coats as described above.
Above-mentioned organic granular 315 with respect to the amount of these cement 314 solids is: per 100 weight portion cement solids, join the organic granular of 0.1 weight portion approximately to about 5 weight portions.The mean grain size of organic granular 315 is extremely about 10 μ m of about 5 μ m, is preferably about 5,8 or 10 microns, and the best is about 8 microns.The size distribution of organic granular 315 there is no particular restriction, can be wide particle diameter and distributes or narrow size distribution, also can be unimodal shape distribution or many (list) peak shape and distributes.In other words, also can use the organic granular that has in pact ± 30% scope that single mean grain size and size distribution fall within this mean grain size to prepare this adherence and prevent layer.
The adherence of optical thin film of the present invention prevents that layer can have component identical or inequality with resinous coat.In other words, can use identical or different organic granular, cement to reach optionally and the adjuvant of adding, constitute above-mentioned adherence and prevent layer and resinous coat.A kind of concrete example is, adherence prevents that the kind of the organic granular 315 in the layer 313 from being identical with the kind of organic granular 305 in the resinous coat 303.Similar with resinous coat, adherence prevents that layer from also can comprise the known suitable additives of any persond having ordinary knowledge in the technical field of the present invention as required, includes but not limited to: leveling agent, stabilization agent, antistatic agent, rigidizer, fluorescent bleaches, light initiator, ultraviolet light absorber or inorganic particles.The kind of adjuvants such as above-mentioned antistatic agent, rigidizer, fluorescent bleaches, light initiator, ultraviolet light absorber or inorganic particles, also previous described similar to this paper.
Optical thin film of the present invention has the mist degree between about 80 to about 98%, and its value is measured according to the JISK7136 standard method; Preferably, this optical thin film has and is not less than about 60% total light transmittance according to JIS K7136 standard method measurement.Therefore, optical thin film of the present invention can be used in the light source device, for example: advertising lamp box and flat-panel screens etc., especially can be used in LCD, and be arranged on the exiting surface top of planar light source device, as diffusion barrier, reach the effect of diffusion light.In addition, optical thin film of the present invention not only can effectively spread light, and has good briliancy simultaneously, therefore can use two or three optical thin films of the present invention as diffusion barrier, replace the previous design of using concentration piece to add other diffusion barrier, good light diffuser efficiency is provided and has good briliancy.
As shown in Figure 4, a slice optical thin film of the present invention shown in Figure 3 can be set on light guide plate or diffuser plate 500.If need, the also stackable multilayer optical thin film of the present invention that is provided with reaches the effect of using a plurality of diffusion layers, making luminance gain.For example, can be as shown in Figure 5, two optical thin films of the present invention as shown in Figure 3 of storehouse on light guide plate or diffuser plate 500; Also can be as shown in Figure 6, three optical thin films of the present invention as shown in Figure 3 of storehouse on light guide plate or diffuser plate 500.Certainly, go back the otpical leaf of storehouse more than three as required.
Fig. 7 is another application mode of optical thin film of the present invention, i.e. storehouse a slice optical thin film as shown in Figure 3 on light guide plate or diffuser plate 500, and then storehouse condensing film 600.Wherein condensing film 600 be there is no particular restriction, can use the known suitable condensing film of any persond having ordinary knowledge in the technical field of the present invention.
Optical thin film of the present invention can be applicable in the known backlight module as diffusion barrier.As shown in Figure 8, the contained blooming of backlight module is reflectance coating 1, diffusion barrier 3, concentration piece 4 and 5 in regular turn, and protectiveness diffusion barrier 6.Optical thin film of the present invention can be used as diffusion barrier 3 wherein.
Technical solution of the present invention is elaborated and contrasts below in conjunction with instantiation.But, they only are exemplary applications, can not be interpreted as the restriction to claim protection domain of the present invention.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within protection scope of the present invention.
Embodiment 1
1), resin-coated preparation
Get one 250 milliliters vial, with solvent: 22 gram toluene, 12 gram butyl acetates add in the vials.The mean grain size that adds 32 grams under high-speed stirred in regular turn is the acrylic particulate [FH-15HY2F2 of 15 μ m, Japan Toyobo company produces, the high-crosslinking-degree organic granular that system is made of methyl methacrylate and the ethylene glycol dimethacrylate monomer of weight ratio 60:40, particle size distribution range is 15 μ m ± 30%], 28 gram polymethylacrylic acid polyol resin [Eterac7361-ts-50, Eternal company] (solid about 50%), add 4 gram rigidizer [Desmodur3390 again, Bayer company] (solid about 75%), 2 gram antistatic agent [GMB-36M-AS, Marubishi oil Chem.Co., Ltd] (solid about 20%), last infusion becomes solid about 49% and the about 100 gram coating of gross weight.With RDS paint daubs #12 coating is coated on the PET base material that thickness is 188 μ m [U34, the Toray company] surface, through 120 ℃ of dryings 1 minute, making coating thickness was first coating of about 22 μ m, i.e. resinous coat.
2), adherence prevents the preparation of layer
Get one 250 milliliters vial, with solvent: 24 gram butanone, 22 gram toluene, 9 gram butyl acetates add in the vials.The mean grain size that adds 1 gram under high-speed stirred in regular turn is the acrylic particulate [FH-8HY2F2 of 8 μ m, Japan Toyobo company produces, the high-crosslinking-degree organic granular that system is made of 60: 40 methyl methacrylate of weight ratio and ethylene glycol dimethacrylate monomer, particle size distribution range is 8 μ m ± 30%], 64 gram polymethylacrylic acid polyol resin resin [Eterac7361-ts-50, Eternal company] (solid about 50%), add 8 gram rigidizer [Desmodur3390 again, Bayer company] (solid about 75%), 2 gram antistatic agent [GMB-36M-AS, Marubishi oil Chem.Co., Ltd] (solid about 20%), last infusion becomes solid about 30% and the about 130 gram coating of gross weight.Be coated on the above-mentioned PET base material opposite side surface that has scribbled first coating (resinous coat) with RDS paint daubs #12, after 1 minute, making coating thickness is second coating (adherence prevents layer) of about 8 μ m through 120 ℃ of dryings.Prepared optical thin film adds up to total film thickness to be about 218 μ m.
Embodiment 2
1), resin-coated preparation
Get one 250 milliliters vial, with solvent: 22 gram toluene, 12 gram butyl acetates add in the vials.The mean grain size that adds 28 grams under high-speed stirred in regular turn is the acrylic particulate [FH-8HY2F2 of 8 μ m, Japan Toyobo company produces, the high-crosslinking-degree organic granular that system is made of methyl methacrylate and the ethylene glycol dimethacrylate monomer of weight ratio 60:40, particle size distribution range is 8 μ m ± 30%], 40 gram polymethylacrylic acid polyol resin [Eterac 7361-ts-50, Eternal company] (solid about 50%), [Desmodur 3390 to add 5 gram rigidizers again, Bayer company] (solid about 75%), 2 gram antistatic agent [GMB-36M-AS, Marubishi oil Chem.Co., Ltd] (solid about 20%), last infusion becomes solid about 47% and the about 109 gram coating of gross weight.With RDS paint daubs #12 coating is coated on the PET base material that thickness is 100 μ m [U34, the Toray company] surface, after 1 minute, makes first coating (resinous coat) that coating thickness is about 12 μ m through 120 ℃ of dryings.
2), adherence prevents the preparation of layer
Get one 250 milliliters vial, with solvent: 22.0 gram butanone, 12.0 gram toluene, 12.0 gram butyl acetates add in the vials.The mean grain size that adds 0.3 gram under high-speed stirred in regular turn is the acrylic particulate [FH-8HY2F2 of 8 μ m, Japan Toyobo company produces, the high-crosslinking-degree organic granular that system is made of 60: 40 methyl methacrylate of weight ratio and ethylene glycol dimethacrylate monomer, particle size distribution range is 8 μ m ± 30%], 48.0 gram polymethylacrylic acid polyol resin [Eterac 7361-ts-50, Eternal company] (solid about 50%), [Desmodur 3390 to add 6.0 gram rigidizers again, Bayer company] (solid about 75%), 2.0 gram antistatic agent [GMB-36M-AS, Marubishi oil Chem.Co., Ltd] (solid about 20%), last infusion becomes solid about 28% and the about 102.3 gram coating of gross weight.Be coated on the above-mentioned PET base material opposite side surface that scribbles first coating (resinous coat) with RDS paint daubs #8, after 1 minute, making coating thickness is second coating (adherence prevents layer) of about 8 μ m through 120 ℃ of dryings.Prepared optical thin film adds up to total film thickness to be about 120 μ m.
Comparative example 1
Thickness is the commercially available diffusion barrier [CH283, SKC company] of 207 μ m.
Comparative example 2
Thickness is the commercially available diffusion barrier [D120, Tsujiden company] of 120 μ m.
Method of testing A:
Thickness test: utilize film thickness gauge [PIM-100, TESA company], press down the thickness that the diaphragm of embodiment 1, embodiment 2 and comparative example 1, comparative example 2 is measured in the way of contact with 1N, its result writes down as above.
Method of testing B:
Distinguish every character of the diaphragm of test implementation example 1, embodiment 2, comparative example 1 and comparative example 2 with method described below.
1. the test of transparent material brightness: utilize NDH 5000W haze meter [Japanese electric look company], according to JIS K7136 standard method, measure the mist degree (Hz) and the total light transmittance (Tt) of testing sample, the result is as shown in table 1 for the test gained.
2. pencil hardness test: utilize pencil scratching tester [Elcometer 3086, SCRATCHBOY], with the pencil hardness of Mitsubishi pencil (2H, 3H) with JISK-5400 method test testing sample surface, the result is as shown in table 1 for the test gained.
3. surface resistivity test: utilize teraohmmeter [East Asia TOADKK company, SM8220﹠amp; SME-8310,500V] measurement testing sample surface resistivity.Test environment is as follows: 23 ± 2 ℃, and 55 ± 5%RH, the result is as shown in table 1 for the test gained.
4. abrasion test: (area length and width 20mm * 20mm) goes up and pastes glutinous diaphragm to be measured (length and width 20mm * 20mm) in 600 g weight platform to utilize linear abrasion wear test machine [TABER 5750], and make its first coat side up, test the weight abrasive resistance of second coating (adherence prevents layer) of another identical diaphragm to be measured with this first coating (resinous coat), with test trip 2inch, the speed of 10cycle/min is carried out the wear-resisting test of 10cycles, and wear-resisting test gained result is as shown in table 1.
5. camber test: diaphragm to be measured is cut into the smooth diaphragm of length and width 100mm * 100mm, places 120 ℃ of baking ovens after 10 minutes, take out and be statically placed in room temperature, rise again to room temperature up to diaphragm, with the warpage degree of four jiaos of clearance gauge measuring diaphragms (the record unit: millimeter (mm), recording mode: for example, 0; 0; 0; 0), so as to the heat-resisting and anti-warpage performance of assessment testing sample, the result is as shown in table 1 for the camber test gained.
Table 1
Embodiment 1 Embodiment 2 Comparative example 1 Comparative example 2
Mist degree Hz (%) 96.20 94.13 96.30 94.20
Total light transmittance Tt (%) 72.30 92.20 72.50 91.40
Pencil hardness (first diffusion layer) 3H 3H 3H 2H
Pencil hardness (second diffusion layer) 3H 3H 2H 2H
Surface resistivity Ω/ (first diffusion layer) 3.8×10 11 3.4×10 11 7.4×10 16 6.7×10 12
Surface resistivity Ω/ (second diffusion layer) 9.0×10 11 6.8×10 11 3.4×10 12 2.3×10 12
The diffusion layer abrasion test No scratch No scratch Scratch Scratch
Camber test (mm) (120 ℃, 10min) 0；0； 0；0 0；0； 0；0 0.1；0.1； 0.1；0.1 0.2；0.2； 0.2；0.2
According to table 1, by the result of embodiment and comparative example as can be known, optical thin film of the present invention has good resistance static behaviour and high rigidity characteristic, and surfacing do not have warpage, thereby can avoid optical property to be affected.
Method of testing C:
With the diaphragm of embodiment 1, embodiment 2, comparative example 1 and comparative example 2, and the concentration piece [PF-96S-188 that produced of Eternal company; PF-96S-125] following backlight 1 of collocation or backlight 2, be combined into various modules and carry out the briliancy analysis afterwards again.
Backlight 1: with 26 ＂ direct-light-type backlights is benchmark, and its structure is configuration 6 U-type cold cathode fluorescent lamp (CCFL) on the anti-UV reflectance coating, places the 2mm diffuser plate again and comes the homogenize light source.
Backlight 2: with 15.4 ＂ side type backlights is benchmark, and its structure is to put light guide plate on the reflectance coating and the light guide plate dual-side is respectively placed reflection lampshade and cold cathode fluorescent lamp (CCFL).
Intensity measuring method: with brightness photometer [Topcon company, SC-777] directly over backlight (0 ° of angle) apart from 50 centimeters places of backlight, with the center briliancy (Brightness of 2 ° of angular measurement backlights of brightness photometer and module to be measured; Unit: cd/m 2) and 13 or 25 briliancy, calculating all degree (Uniformity) together of luminance gain value (Brightness Gain) and briliancy in following mode again, record the results are shown in table 2 and table 3.
The luminance gain value: the center brightness value of selecting a certain module or backlight is as base value, the center brightness value of another module to be measured and the difference of base value be multiply by 100% again divided by base value, can learn the luminance gain value of module to be measured compared to a certain module or backlight.
Briliancy is degree together all: the briliancy minimum value of gained multiply by 100% (that is briliancy minimum value/briliancy maximal value * 100%) again divided by the briliancy maximal value in 13 or the test of 25 briliancy.
Table 2
26 ＂ direct-light-type backlights Center briliancy (cd/m 2) Luminance gain value (%) 25 briliancy are all spent (%) together
Backlight 1 8,353 0 95.7
Backlight 1 adds a slice embodiment 1 diaphragm 11,444 +37 95.6
Backlight 1 adds two embodiment 1 diaphragms 12,195 +46 95.6
Backlight 1 adds three embodiment 1 diaphragms 12,362 +48 95.5
Backlight 1 adds a slice embodiment 1 diaphragm and a slice concentration piece (PF-96S-188) 15，119 +81 95.2
Backlight 1 adds two comparative example 1 diaphragms 11,694 +40 95.4
As shown in Table 2, the center brightness value of former 26 ＂ direct-light-type backlights is 8,353cd/m 2, add that a slice embodiment 1 diaphragm can provide 37% luminance gain value, makes briliancy reach 11,444cd/m 2Adding two embodiment 1 diaphragms can provide 46% luminance gain value, makes briliancy reach 12,195cd/m 2Adding three embodiment 1 diaphragms then can provide 48% luminance gain value, makes briliancy reach 12,362cd/m 2Add a slice embodiment 1 diaphragm and a slice concentration piece (PF-96S-188) then can provide 81% luminance gain value, make briliancy reach 15,119cd/m 2Yet backlight 1 adds the module of two comparative example 1 diaphragms, and 40% luminance gain value only can be provided, and briliancy reaches 11,694cd/m 2Add the module of two comparative example 1 diaphragms compared to backlight 1, the diaphragm that backlight 1 adds two embodiment of the invention 1 can provide preferable luminance gain value.
In addition, as shown in Table 2, backlight 1 adds two embodiment 1 diaphragms, backlights 1 and adds that three embodiment 1 diaphragms, backlights 1 add a slice embodiment 1 diaphragm and concentration piece all can significantly promote briliancy, and can keep its 25 briliancy all together degree reach more than 95%.Therefore, optical thin film of the present invention can be applicable to the backlight module of LCD and LCD TV, effectively spreads light and good briliancy is provided, and replaces original design.
Table 3
15.4 ＂ side type backlight Center briliancy (cd/m 2) 13 briliancy are all spent (%) together
Backlight 2 adds a slice embodiment 2 diaphragms and two concentration pieces (PF-96S-125) 3,375 86.7
Backlight 2 adds a slice comparative example 2 diaphragms and two concentration pieces (PF-96S-125) 3,125 86.5
As shown in Table 3, backlight 2 adds that the center briliancy of a slice embodiment of the invention 2 diaphragms and two mutually perpendicular concentration pieces (PF-96S-125) gained is 3,375cd/m 2Backlight 2 adds that the center briliancy of a slice comparative example 2 diaphragms and two mutually perpendicular concentration pieces (PF-96S-125) gained is 3,125cd/m 2Than the module of using comparative example 2 diaphragms, use the brightness value of the module of the embodiment of the invention 2 diaphragms to exceed 250cd/m 2, can increase by 8% brightness value, can keep suitable all spending together simultaneously.Therefore, optical thin film of the present invention can be applicable to effectively spread light, and good briliancy is provided in the backlight module that LCD and mobile computer use.

Claims (28)

1. has the resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, comprise a base material, at least one surface of base material comprises the resinous coat with concaveconvex structure, this resinous coat comprises cement and a plurality of organic granular, it is characterized in that: described organic granular is a polyacrylate resin, this resin is polymerized via the acrylic ester monomer of at least a monofunctional and the acrylic ester monomer of at least a multiple functional radical, and wherein the acrylic ester monomer of all multiple functional radicals accounts for polymerization single polymerization monomer general assembly (TW) 30～70%; Described organic granular has single mean grain size, and its size distribution falls within mean grain size ± 30% scope; And described organic granular is that per 100 weight portion cement solids contain the organic granular of 110～360 weight portions with respect to the amount of described cement solid.
2. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: the size distribution of the organic granular that described resinous coat comprised falls within mean grain size ± 15% scope.
3. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: the mean grain size of described organic granular is 5～30 microns.
4. according to claim 3 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: the mean grain size of described organic granular is 8～20 microns.
5. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described organic granular is that per 100 weight portion cement solids contain the organic granular of 120～250 weight portions with respect to the amount of described cement solid.
6. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described resin-coated thickness is 5～30 microns.
7. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: the acrylic ester monomer of described monofunctional is, methyl methacrylate, butyl methacrylate, the 2-phenoxyethyl acrylate, ethoxyquin 2-phenoxyethyl acrylate, 2-(2-ethoxy ethoxy) ethyl propylene acid esters, ring trimethylolpropane dimethoxym ethane acrylate, β-propyloic acrylic ester, the lauric acid methacrylate, isooctyl acrylate, the stearic acid methacrylate, the isodecyl acrylate, the isobornyl methacrylate, the benzyl acrylate, 2-hydroxyethyl methacrylate phosphate, methacrylate, hydroxy-ethyl acrylate, methacrylic acid-2-hydroxy methacrylate, or two or more potpourri in the middle of the above-mentioned substance.
8. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: the acrylic ester monomer of described multiple functional radical is, 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate, ethoxyquin 1, the 6-hexanediyl ester, propylene glycol diacrylate, tristane dimethanol diacrylate, the ethoxyquin propylene glycol diacrylate, neopentylglycol diacrylate, the third oxidation neopentylglycol diacrylate, the ethoxyquin bisphenol a dimethacrylate, the 2-methyl isophthalic acid, the ammediol diacrylate, ethoxyquin-2-methyl isophthalic acid, the ammediol diacrylate, 2-butyl-2-ethyl-1, the ammediol diacrylate, ethylene glycol dimethacrylate, the diethylene glycol dimethylacrylate, three (2-hydroxyethyl) isocyanic acid triacrylate, pentaerythritol triacrylate, the ethoxyquin trimethylolpropane triacrylate, the third oxidation trimethylolpropane triacrylate, trimethylol-propane trimethacrylate, tetramethylol methane tetraacrylate, the ethoxyquin tetramethylol methane tetraacrylate, two-trimethylolpropane tetra-acrylate, the third oxidation tetramethylol methane tetraacrylate, tetramethylol methane tetraacrylate, dipentaerythritol acrylate, the tripropylene glycol dimethylacrylate, 1, the 4-butanediol dimethylacrylate, 1, the 6-hexanediol dimethacrylate, allylation dimethacrylate cyclohexyl, the dimethacrylate isocyanates, the ethoxylated trimethylolpropane trimethyl acrylic ester, the propoxylated glycerol trimethyl acrylic ester, trimethylol-propane trimethacrylate, three (propylene oxygen ethyl) isocyanates, or two or more potpourri in the middle of the above-mentioned substance.
9. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described polyacrylate resin is to be formed by methyl methacrylate and these two kinds of monomer polymerizations of ethylene glycol dimethacrylate.
10. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: a surface of base material comprises resinous coat, another surface of base material has an adherence and prevents layer, and this adherence prevents that layer from comprising cement and a plurality of organic granular.
11. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described adherence prevents that the mean grain size of the organic granular that layer is comprised from being 5 microns～10 microns.
12. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described adherence prevents that the size distribution of the organic granular that layer is comprised from falling within mean grain size ± 30% scope.
13. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described adherence prevents that layer organic granular that is comprised from being that per 100 weight portion cement solids contain the organic granular of 0.1～5 weight portion with respect to the amount of cement solid.
14. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described adherence prevents that the thickness of layer from being 1～10 micron.
15. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described adherence prevents that the organic granular that layer is comprised from being polyacrylate resin.
16. according to claim 15 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described polyacrylate resin is to be formed by methyl methacrylate and these two kinds of monomer polymerizations of ethylene glycol dimethacrylate.
17. according to claim 16 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: in total monomer weight, the consumption of described ethylene glycol dimethacrylate is 30～70%.
18. according to claim 1 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described base material is polyethylene terephthalate resin, polymethacrylate resin, polycarbonate resin, polystyrene resin, poly-cyclic olefin resins, polyolefin resin, polyurethane resin, Triafol T, polyimide resin, vibrin, or two or more potpourri in the middle of them.
19. describedly have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising according to claim 1 or 10, it is characterized in that: described cement is ultraviolet hardening resin, thermoset resin, thermoplastic resin, or two or more potpourri in the middle of them.
20. according to claim 19 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described ultraviolet hardening resin is polymerized via at least a acrylic monomer or acrylic ester monomer with one or more functional groups.
21. according to claim 20 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described acrylic ester monomer is, methacrylate, acrylate, amido formate acrylate, polyester acrylate, or two or more potpourri in the middle of them.
22. according to claim 20 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described ultraviolet hardening resin further comprises the acrylic ester oligomer.
23. according to claim 19 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described thermoset resin is, the vibrin, epoxy resin, polymethacrylate resin, polyamide resin, fluoroplast, polyimide resin, polyurethane resin, the alkyd resin that contain hydroxyl and/or carboxyl, or two or more potpourri in the middle of them.
24. according to claim 19 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described thermoplastic resin is vibrin, polymethacrylate resin, or their potpourri.
25. according to claim 10 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, and it is characterized in that: described resinous coat or adherence prevent that layer from also further containing one or more adjuvants that are selected from the group that is made up of leveling agent, stabilization agent, antistatic agent, rigidizer, fluorescent bleaches, light initiator, ultraviolet light absorber and inorganic particles.
26. according to claim 25 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described antistatic agent is ethoxy fatty acid glyceride class, quaternary ammonium compound compound, fatty amine analog derivative, polyethylene oxide, siloxane and alcohol derivatives, or two or more potpourri in the middle of them.
27. according to claim 25 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described rigidizer is a polyisocyanate.
28. according to claim 25 have a resin-coated optical thin film of the narrow particle size distributed organic particle of comprising, it is characterized in that: described inorganic particles is zinc paste, strontium titanates, zirconia, aluminium oxide, titania, calcium sulphate, barium sulphate, lime carbonate, or two or more potpourri in the middle of them.
CNB2007100253128A 2007-07-23 2007-07-23 Optical film with resin coating comprising narrow particle size distribution organic particles Expired - Fee Related CN100492060C (en)

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JP5326767B2 (en) * 2009-04-20 2013-10-30 大日本印刷株式会社 Fine particles for optical functional layer, optical member for display and antiglare functional layer
CN102109144B (en) * 2009-12-23 2013-06-19 东莞市群跃电子材料科技有限公司 Lower diffusion sheet in backlight module and manufacturing method thereof
CN101887138A (en) * 2010-06-23 2010-11-17 上海晶友特种薄膜材料有限公司 Photoelectric diffusion barrier with full gloss permeability and good photic diffusivity
TWI447923B (en) * 2011-04-01 2014-08-01 Eternal Chemical Co Ltd Brightening penetrating film and solar cell module therewith
CN103364290A (en) * 2012-03-31 2013-10-23 海洋王（东莞）照明科技有限公司 Light guide plate dot hardness test method
CN106749849B (en) * 2013-06-28 2020-10-20 积水化成品工业株式会社 Acrylic resin particle, coating composition, and optical material
CN105572774A (en) * 2014-10-13 2016-05-11 鸿富锦精密工业（深圳）有限公司 Diffusion film, preparation method thereof, backlight module, display device and electronic device
CN108690166B (en) * 2017-04-05 2020-09-29 宁波激智科技股份有限公司 High-refractive-index flexible diffusion particle, preparation method thereof and optical film

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