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WO2018167823A1 - Composition de formation d'un film de projection, film de projection et écran de projection - Google Patents

Composition de formation d'un film de projection, film de projection et écran de projection Download PDF

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Publication number
WO2018167823A1
WO2018167823A1 PCT/JP2017/009978 JP2017009978W WO2018167823A1 WO 2018167823 A1 WO2018167823 A1 WO 2018167823A1 JP 2017009978 W JP2017009978 W JP 2017009978W WO 2018167823 A1 WO2018167823 A1 WO 2018167823A1
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WIPO (PCT)
Prior art keywords
projection
parts
resin
film
projection film
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PCT/JP2017/009978
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English (en)
Japanese (ja)
Inventor
金野公彦
大谷紀昭
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マクセルホールディングス株式会社
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Priority to PCT/JP2017/009978 priority Critical patent/WO2018167823A1/fr
Publication of WO2018167823A1 publication Critical patent/WO2018167823A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Definitions

  • the present invention relates to a projection film preparation composition, a projection film prepared using the projection film preparation composition, and a projection screen using the projection film.
  • Projectors are used for various purposes such as personal use such as home theater, digital signage such as product advertisements, and corporate activities such as projecting data in conference rooms.
  • the projection screen of such a projector includes a transmissive screen that projects an image on the back of the projection screen and visually recognizes the transmitted light, and a reflective screen that projects the image on the front of the projection screen and visually recognizes the reflected light.
  • a transmissive screen that projects an image on the back of the projection screen and visually recognizes the transmitted light
  • a reflective screen projects the image on the front of the projection screen and visually recognizes the reflected light.
  • There are two types. What is important for each type of screen is that the projected image can be clearly confirmed, that is, visibility. In order to improve visibility, it is necessary for transmitted light to be particularly bright in a transmissive screen.
  • ultra-short focus projectors in which the distance between the projector and the projection screen is shortened have been commercialized.
  • the ultra-short focus projector differs from the conventional projector in the image projection angle.
  • Conventional projectors project images from the front direction onto the projection screen, whereas ultra-short focus projectors place the projector close to the projection screen, so project images from an extremely oblique direction.
  • the incident angle of the projection light with respect to the projection screen increases, so the amount of light transmitted through the screen decreases, and the projected image becomes darker than when a conventional projector is used. It will be inferior.
  • a cyclic olefin resin and a hollow organic olefin resin having an affinity for a cyclic olefin resin and an average particle diameter of 2.0 ⁇ m or more are used. It has been proposed to use a resin composition containing. This resin composition is excellent in moldability. By using this resin composition, it is said that it is possible to provide a transmissive screen diffusion plate with improved brightness and image clarity.
  • a cyclic olefin-based resin has a low tear strength and is also susceptible to impact, so that it is difficult to handle when used in a projection film.
  • Patent Document 2 proposes a transmission screen using hollow beads.
  • a range of 0.1 to 40 ⁇ m is used as the average diameter (hole diameter) of the gas part of the hollow beads.
  • a large amount of scattered light is used. Although the visibility of the image is improved, the confirmation and transparency of the object on the back side of the screen are still insufficient.
  • Patent Documents 3 to 7 there are Patent Documents 3 to 7 and Non-Patent Documents 1 and 2.
  • JP 2008-64951 A Japanese Patent No. 4847329 (International Publication WO2006 / 016556) Japanese Patent No. 4046921 (Japanese Patent Laid-Open No. 2001-233611) Japanese Patent No. 4654428 (Japanese Patent Laid-Open No. 2005-263550) Japanese Patent No. 4816634 (Japanese Patent Laid-Open No. 2006-256922) Japanese Patent No. 4853662 (Japanese Patent Laid-Open No. 2008-247664) Japanese Patent No. 5194935 (Japanese Patent Laid-Open No. 2009-234848)
  • the projection film is not easily torn during cutting or processing of the projection film before being applied to a glass substrate or the like, and even if the application is performed using a squeegee or the like, the projection film It is an object of the present invention to provide a projection film that is less likely to be scratched on the surface, has good visibility, and has good transparency.
  • the composition for producing a projection film of the present invention is a composition for producing a projection film containing hollow particles, a polymerizable compound, and a solvent, and the average particle diameter of primary particles of the hollow particles is 30 nm. More than or equal to 500 nm, the porosity of the hollow particles is 20% by volume or more and 95% by volume or less, and the content of the hollow particles is 100 parts by mass of the polymerizable compound other than the hollow particles. It is characterized by being 10 parts by mass or more and 150 parts by mass or less.
  • the projection film of the present invention is a projection film having a resin layer on at least one surface of a substrate, and the substrate is made of a resin film having a glass transition temperature of 95 ° C. or less, and the resin layer Includes hollow particles and a resin, the average particle diameter of primary particles of the hollow particles is 30 nm or more and 500 nm or less, and the porosity of the hollow particles is 20% by volume or more and 95% by volume or less, The content of the hollow particles is 10 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the resin, and the thickness of the resin layer is at least twice the average particle diameter of the hollow particles. It is characterized by.
  • the projection screen of the present invention is a projection screen including a member and a projection film affixed to the member, wherein the projection film is the projection film of the present invention. To do.
  • a projection film having excellent tear resistance, scratch resistance and optical characteristics can be provided.
  • FIG. 1 is a schematic cross-sectional view showing an example of the projection screen of the present invention.
  • FIG. 2 is a schematic diagram showing an example of a state in which an image is projected onto the projection screen of the present invention using an ultrashort focus projector.
  • composition for producing a projection film of the present invention The present inventors have studied various means for improving scratch resistance and optical properties in the projection film, and found that a resin layer containing hollow particles and a resin may be formed on the surface of the projection film. The composition for producing a projection film of the present invention was completed.
  • the composition for producing a projection film of the present invention includes hollow particles, a polymerizable compound, and a solvent, and the average particle diameter of primary particles of the hollow particles is 30 nm to 500 nm, and the hollow
  • the porosity of the particles is 20% by volume or more and 95% by volume or less, and the content of the hollow particles is 10 parts by mass or more with respect to 100 parts by mass of the solid component containing the polymerizable compound other than the hollow particles. It is 150 parts by mass or less.
  • composition for producing a projection film of the present invention contains hollow particles having an average primary particle diameter of 30 nm to 500 nm and a porosity of 20 vol% to 95 vol%, A projection film having excellent scratch resistance and optical properties can be provided.
  • the content of the hollow particles must be set to 10 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the solid component containing the polymerizable compound other than the hollow particles, and 20 parts by mass or more. 120 parts by mass or less is more preferable.
  • the content of the hollow particles is less than 10 parts by mass, the effect of improving the light transmittance of the projection film is reduced.
  • the content of the hollow particles exceeds 150 parts by mass, the scratch resistance of the projection film is reduced. descend.
  • the average particle size of the hollow particles used in the present invention needs to be 30 nm or more and 500 nm or less, and more preferably 60 nm or more and 300 nm or less.
  • the average particle diameter is less than 30 nm, the specific surface area of the particles is increased, and more solvent is required to disperse the particles. In some cases, sufficient thickness cannot be secured.
  • the average particle diameter exceeds 500 nm, light scattering increases, or the haze of the projection film increases and the transparency is not improved.
  • the porosity of the hollow particles needs to be 20% by volume or more and 95% by volume or less, and preferably 30% by volume or more and 75% by volume or less.
  • the porosity is less than 20% by volume, the light transmittance of the projection film is not improved, and the visibility of the image is poor.
  • the porosity exceeds 95% by volume, the shell wall of the particle becomes thin and easily broken, or the light transmittance of the projection film is not improved and the image visibility is poor.
  • the light transmittance of the projection film is improved and the haze is as low as less than 15%. Therefore, when used for a screen for an ultra-short focus projector, a projection film having excellent visibility from the front and oblique directions and excellent transparency can be obtained. Both visibility and transparency of the image depend on the haze value, and the present inventors have found that the haze value may be adjusted to less than 15% in order to achieve both of these, and the present invention has been achieved.
  • the average particle diameter and porosity of the hollow particles can be calculated by observing the hollow particles with a scanning electron microscope (SEM) or a transmission electron microscope (TEM).
  • SEM scanning electron microscope
  • TEM transmission electron microscope
  • the hollow particles may be observed directly, or the hollow particles may be cross-sectionally processed by ion milling, and the hollow particles may be cross-sectionally processed with a microtome or the like after being embedded in a resin. May be observed.
  • the particle diameter and the shell wall thickness are measured, and the average particle diameter and the average shell wall thickness are obtained. Find the rate.
  • the particle diameter of the hollow particles refers to the so-called primary particle size, and when the hollow particles are spherical or ellipsoidal in which the ratio of the major axis length to the minor axis length is 1 to 3.5.
  • the maximum delivery diameter is defined as the particle diameter, and in the case of other particles, the major axis diameter is defined as the particle diameter of the particle.
  • Porosity (%) [(average particle size ⁇ average thickness of shell wall ⁇ 2) / average particle size] 3 ⁇ 100 (1)
  • the content of the hollow particles contained in the projection film preparation composition of the present invention is 10 parts by mass or more and 150 parts by mass with respect to 100 parts by mass of the solid component containing the polymerizable compound other than the hollow particles.
  • the solid component excluding the polymerizable compound includes, for example, optional components such as a photopolymerization initiator, a resin polymer, a dispersant, and a tackifier.
  • the content of the hollow particles can be measured by, for example, a thermal analysis method. That is, after the non-solid component such as a solvent is removed by heating the film-forming composition for projection, the mass of the remaining solid component is measured, and further heated to around 700 ° C. to obtain a solid component other than the hollow particles. The mass of the residue after burning is measured. Since the mass of the residue is considered to be the mass of the hollow particles, the content of the hollow particles contained in the projection film preparation composition can be determined from the mass of the residue and the mass of the solid component.
  • the material of the hollow particles is not limited, and both hollow inorganic particles and hollow organic particles can be used, but hollow silica particles that are hollow inorganic particles are particularly preferable. This is because the hollow silica particles have high physical strength and are excellent in dispersibility in the composition for producing a projection film.
  • the hollow silica particles may contain other metal elements in addition to SiO 2 as a constituent component, or may be a hydrous compound.
  • the method for producing hollow silica particles having an average particle diameter of 30 nm or more and 500 nm or less is not particularly limited.
  • the hollow silica particles can be produced by a template method as described in Non-Patent Document 1 described above. More specifically, a method using the bubbles described in Non-Patent Document 2 as a template, an inorganic template method using the inorganic particles described in Patent Documents 3, 4, and 5 as a template, Patent Document 6 described above, 7 can be produced by an organic template method using the organic particles described in 7 as a template.
  • the hollow silica particles may be subjected to a surface treatment in order to improve familiarity with a resin formed by polymerizing the polymerizable compound.
  • the surface treatment may be performed, for example, by adding a silicon coupling agent to a dispersion or suspension of hollow silica particles.
  • the organic functional group that modifies the surface of the hollow silica particles varies depending on the silicon coupling agent to be used, it is preferable to modify the surface with a methyl group, a phenyl group, or the like for surface treatment.
  • the polymerizable compound preferably contains at least the oligomer.
  • the oligomer urethane acrylate, polyether acrylate, polyester acrylate and the like can be suitably used.
  • the so-called film-forming property is improved and the molecular weight between cross-linking points is increased, and the warpage of the film after production, so-called curling, can be reduced as compared with the case where the monomer is used alone.
  • the monomer it is preferable to use a conventionally known ultraviolet curable resin monomer.
  • polyfunctional monomers such as pentaerythritol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate may be used.
  • the above-mentioned polymerizable compound contains a functional group that reacts when irradiated with radiation such as gamma rays, electron beams, or ultraviolet rays, and an acrylic group or methacryl group is preferable as the functional group that reacts upon irradiation with radiation.
  • the composition for producing a projection film of the present invention preferably contains a photopolymerization initiator together with the polymerizable compound.
  • the photopolymerization initiator include 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-1,2-diphenylethane-1-one, and 2-hydroxy-2-methyl-1-phenylpropan-1-one.
  • 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2,4,6-trimethyl Benzoyl-diphenyl-phosphine oxide or the like can be preferably used.
  • the addition amount of the photopolymerization initiator may be 0.1 to 10 parts by mass, and preferably 0.3 to 5 parts by mass with respect to 100 parts by mass of the polymerizable compound.
  • the method for producing the composition for producing a projection film of the present invention is not particularly limited.
  • the above-described components may be mixed with a solvent to sufficiently disperse each solid component.
  • the said mixing method is not specifically limited, For example, it can mix using a disper, a homomixer, a ribbon mixer, a paddle mixer, a planetary mixer, a roll mill, a kneader, a ball mill, a sand mill, a high-pressure homogenizer, an ultrasonic disperser, etc.
  • a conventionally known solvent can be used as the solvent.
  • ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone and isophorone
  • esters such as methyl acetate, ethyl acetate and butyl acetate, aliphatics such as hexane and octane, and aromatics such as toluene and xylene
  • Alcohols such as ethylene glycol, methanol, ethanol, isopropanol, terpenes such as terpineol, dihydroterpineol, limonene, methyl glycol, isopropyl glycol, methyl propylene glycol, propyl propylene glycol, butyl propylene glycol, methyl propylene glycol acetate, dimethyl glycol
  • a glycol ether solvent such as dimethyldiglycol may be used alone or in combination. What is
  • the projection film of the present invention includes a base material and a resin layer formed on the base material, and the base material is composed of a resin film having a glass transition temperature of 95 ° C. or less.
  • Hollow particles and a resin the primary particles of the hollow particles have an average particle diameter of 30 nm to 500 nm, the void ratio of the hollow particles is 20% to 95% by volume, and the hollow
  • the particle content is 10 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the resin, and the thickness of the resin layer is twice or more the average particle diameter of the hollow particles.
  • the substrate of the projection film of the present invention is made of a resin film having a glass transition temperature of 95 ° C. or lower, the projection film is cut when the projection film is applied to a glass substrate or the like before cutting. It is hard to tear.
  • the resin layer of the projection film of the present invention contains hollow particles having an average primary particle diameter of 30 nm to 500 nm and a porosity of 20 vol% to 95 vol%, A projection film excellent in scratch resistance and optical properties can be provided.
  • the content of the hollow particles in the resin layer needs to be set to 10 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the resin, and more preferably 20 parts by mass or more and 120 parts by mass or less.
  • the content of the hollow particles is less than 10 parts by mass, the effect of improving the light transmittance of the projection film is reduced.
  • the content of the hollow particles exceeds 150 parts by mass, the scratch resistance of the projection film is reduced. descend.
  • the content of the hollow particles contained in the resin layer of the projection film of the present invention is set to 10 to 150 parts by mass with respect to 100 parts by mass of the resin. It can be measured by analytical methods. That is, the resin layer of the projection film peeled off from the substrate is heated to around 700 ° C., the mass of the residue is measured, and the mass of the hollow particles contained in the resin layer is determined from the mass of the residue. The content of the hollow particles contained in the resin layer can be determined from the mass of the hollow particles.
  • the thickness of the resin layer needs to be at least twice the average particle diameter of the hollow particles.
  • the surface of the resin layer can be smoothed and rubbed with a squeegee or the like when the projection film is attached to a glass substrate or the like. The film surface is not scratched.
  • the projection film can have a haze of less than 15%.
  • the base material used in the present invention may be a resin film having a glass transition temperature of 95 ° C. or lower.
  • a resin film having a glass transition temperature of 95 ° C. or lower for example, a polyethylene terephthalate (PET) film, a polyethylene naphthalate (PEN) film, etc. can be used. From the viewpoint, a PET film is preferable.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • the tear resistance can be improved as described above.
  • the thickness of the substrate is not particularly limited, and can be, for example, 10 to 200 ⁇ m.
  • the resin layer used in the present invention contains hollow particles and a resin, and the same hollow particles used in the above-mentioned composition for producing a projection film of the present invention can be used for the hollow particles.
  • resin for example, acrylic resin, polyurethane resin, polystyrene resin, polycarbonate resin, polyester resin, polyether resin, and the like can be used.
  • polymerized the polymeric compound used with the composition for film production for projection of the above-mentioned this invention can also be used as said resin.
  • the upper limit of the thickness of the resin layer is not particularly limited as long as it is twice or more the average particle diameter of the hollow particles, and can be, for example, 5 ⁇ m or less.
  • the production method of the projection film of the present invention is not particularly limited.
  • a coating liquid containing the hollow particles, the resin, and a solvent is prepared, the coating liquid is applied to the substrate, and dried. It can manufacture by forming the said resin layer on a base material.
  • the method for applying the coating solution is not particularly limited as long as it is a coating method that can form a smooth coating film.
  • a gravure roll method a micro gravure roll method, a micro gravure coater method, a slit die coat Method, comma coat method, spin method, knife method, kiss method, squeeze method, reverse roll method, dipping method, bar coat method and the like.
  • the projection film of the present invention is obtained by polymerizing the polymerizable compound contained in the projection film preparation composition after applying the projection film preparation composition of the present invention to the substrate. It can also be produced by forming the resin layer on the substrate.
  • the method for polymerizing the polymerizable compound is not particularly limited, a method of irradiating the coating film with ionizing radiation such as ultraviolet rays can be used.
  • the ionizing radiation for example, ultraviolet rays, electron beams, ⁇ rays, and the like can be used, but ultraviolet rays are frequently used because they can be easily used.
  • the ultraviolet light source a high-pressure mercury lamp, a metal halide lamp, an ultraviolet LED lamp, or the like can be used.
  • ultraviolet rays it is preferable to include a photopolymerization initiator in the composition for producing a projection film as described above.
  • the projection screen of the present invention comprises a member and a projection film affixed to the member, and the projection film is the projection film of the present invention. Since the projection screen of the present invention includes the projection film of the present invention, it has excellent visibility.
  • the projection screen of the present invention can be used as a transmissive screen or a reflective screen, but is particularly excellent in visibility when used as a transmissive screen.
  • the member and the projection film are bonded together with an adhesive. Thereby, peeling of the projection film from the substrate can be prevented.
  • the said adhesive is not specifically limited.
  • the member is not particularly limited, for example, a glass substrate, a glass sheet, a resin substrate, a resin sheet, or the like can be used.
  • the resin layer of the projection film is disposed on the outermost layer. Thereby, the visibility of a screen can be improved more.
  • the production method of the projection screen of the present invention is not particularly limited.
  • the projection film may be bonded to the member with an adhesive or the like.
  • FIG. 1 is a schematic cross-sectional view showing an example of the projection screen of the present invention.
  • a projection screen 10 of the present invention includes a projection film 11 and a transparent substrate 12, and the projection film 11 is bonded onto the transparent substrate 12 via an adhesive (not shown).
  • the projection film includes a resin film 11a having a glass transition temperature of 95 ° C. or less and a resin layer 11b disposed on the resin film 11a.
  • the resin layer 11b is formed of hollow particles and a resin, and is disposed on the outermost layer of the projection screen.
  • FIG. 2 is a schematic diagram showing an example of a state in which an image is projected by an ultra-short focus projector using the projection screen shown in FIG. 1 as a transmission screen.
  • the projection screen 10 is arranged with the projection film 11 side facing the ultrashort focus projector 13 side.
  • the projection light from the ultra-short focus projector 13 is projected to the projection direction 13a side, and the viewer of the image visually recognizes from the viewing direction 14 side.
  • the projection film 11 is composed of a resin film 11 a and a resin layer 11 b disposed on the resin film 11 a, as in FIG. 1, and is attached to the transparent substrate 12.
  • part means “part by mass”.
  • Example 1 Preparation of a composition for producing a projection film (coating solution)> First, the following components (1) to (3) were placed in a stainless steel container and stirred and mixed to prepare a mixed solution.
  • Polymerizable compound urethane acrylate: manufactured by Nippon Kayaku Co., Ltd., trade name “KAYARAD DPHA-40H”
  • Photopolymerization initiator [2-methyl-1- [4- (methylthio) -phenyl ] -2-Morpholinopropan-1-one]: 1.5 parts
  • Solvent methyl ethyl ketone
  • Example 2 ⁇ Preparation of a composition for producing a projection film (coating solution)> First, the following components (1) to (3) were placed in a stainless steel container and stirred and mixed to prepare a mixed solution.
  • Polymerizable compound polyfunctional acrylate: manufactured by Nippon Kayaku Co., Ltd., trade name “KAYARAD DPCA-60”: 50 parts
  • Photopolymerization initiator [2-methyl-1- [4- (methylthio)- Phenyl] -2-morpholinopropan-1-one]: 1.5 parts
  • Solvent methyl ethyl ketone
  • a projection film 2 was produced in the same manner as in Example 1 except that the coating liquid 2 was used and the coating thickness was 1.7 ⁇ m.
  • Example 3 ⁇ Preparation of hollow silica particles> 75 parts of polystyrene particle suspension (manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.1 ⁇ m, solid content concentration: 2.5 mass%) was heated to 40 ° C., and the suspension was The following components (1) to (4) were blended with stirring, and further stirred for 30 minutes to prepare a mixed solution.
  • Isopropanol 800 parts
  • the mixture was allowed to stand at 40 ° C. for 10 hours and then returned to room temperature. Thereafter, the produced particles were collected by centrifugation and dispersed in water. The above centrifugation, particle recovery, and water dispersion were repeated twice, and after filtration through a filter, the particles were recovered by centrifugation. Thereafter, the collected particles were dried at 100 ° C. for 5 hours, and then the obtained powder was put into a firing furnace, heated to 500 ° C. at a rate of 1 ° C./minute while airflowing, and fired at 500 ° C. for 3 hours. Furthermore, the temperature was raised to 900 ° C. at a rate of 5 ° C./minute, and after firing at 900 ° C. for 3 hours, the mixture was gradually cooled to room temperature to obtain hollow silica particles.
  • the hollow silica particles prepared above: 45 parts and the solvent (methyl ethyl ketone): 255 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended into the mixed liquid, stirred and mixed, and further subjected to ultrasonic dispersion treatment while cooling the container with water, whereby a coating liquid 3 was obtained.
  • a projection film 3 was produced in the same manner as in Example 1 except that the coating solution 3 was used and the coating thickness was 2.5 ⁇ m.
  • Example 4 ⁇ Preparation of hollow silica particles> Using 75 parts of polystyrene particle suspension (manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.2 ⁇ m, solid content concentration: 2.5 mass%), the amount of tetraethoxysilane is 7 parts. Except for the change, hollow silica particles were produced in the same manner as in Example 3.
  • the hollow silica particles prepared above: 7.5 parts and the solvent (methyl ethyl ketone): 42.5 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended into the mixed liquid, stirred and mixed, and further subjected to ultrasonic dispersion treatment while cooling the container with water to obtain a coating liquid 4.
  • a projection film 4 was produced in the same manner as in Example 1 except that the coating solution 4 was used and the coating thickness was 2.8 ⁇ m.
  • Example 5 ⁇ Preparation of hollow silica particles> Using 75 parts of polystyrene particle suspension (manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.2 ⁇ m, solid content concentration: 2.5% by mass), the amount of water added to 465 parts, isopropanol The hollow silica particles were prepared in the same manner as in Example 3 except that the amount was 2400 parts, the amount of ammonia water was 90 parts, and the amount of tetraethoxysilane was 40 parts.
  • polystyrene particle suspension manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.2 ⁇ m, solid content concentration: 2.5% by mass
  • the hollow silica particles were prepared in the same manner as in Example 3 except that the amount was 2400 parts, the amount of ammonia water was 90 parts, and the amount of tetraethoxysilane was 40 parts.
  • the hollow silica particles prepared above: 15 parts and the solvent (methyl ethyl ketone): 85 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended into the mixed solution, stirred and mixed, and further subjected to ultrasonic dispersion treatment while cooling the container with water to obtain a coating solution 5.
  • a projection film 5 was produced in the same manner as in Example 1 except that the coating liquid 5 was used and the coating thickness was 2.4 ⁇ m.
  • the coating liquid 6 is coated on a cyclic olefin-based resin film (trade name “ZEONOR FILM ZF14-100”, glass transition temperature: 136 ° C., manufactured by Nippon Zeon Co., Ltd.) using a bar coater.
  • a bar coater was applied to a thickness of 0.27 ⁇ m and dried.
  • the coating film is cured by irradiating ultraviolet rays so that the integrated light quantity becomes 250 mJ / cm 2 using a high-pressure mercury lamp, and a resin layer is formed on the film to produce a projection film 6. did.
  • the hollow silica particles prepared in Example 3 80 parts and the solvent (methyl ethyl ketone): 453 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended into the mixed liquid, stirred and mixed, and then subjected to ultrasonic dispersion treatment while cooling the container with water, whereby a coating liquid 7 was obtained.
  • a projection film 7 was produced in the same manner as in Example 1 except that the coating liquid 7 was used and the coating thickness was 2.6 ⁇ m.
  • Example 3 2.5 parts of hollow silica particles prepared in Example 3 and 15 parts of solvent (methyl ethyl ketone) were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended into the mixed liquid, stirred and mixed, and further subjected to ultrasonic dispersion treatment while cooling the container with water, whereby a coating liquid 8 was obtained.
  • a projection film 8 was produced in the same manner as in Example 1 except that the coating liquid 8 was used and the coating thickness was 2.8 ⁇ m.
  • Example 4 ⁇ Preparation of hollow silica particles> Using 75 parts of a polystyrene particle suspension (manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.2 ⁇ m, solid content concentration: 2.5 mass%), the amount of water is 1550 parts, and isopropanol is used.
  • the hollow silica particles were prepared in the same manner as in Example 3 except that the amount was 8000 parts, the amount of ammonia water was 300 parts, and the amount of tetraethoxysilane was 125 parts.
  • the hollow silica particles prepared above: 50 parts and the solvent (methyl ethyl ketone): 285 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • the hollow silica particle suspension was blended with the mixed liquid, stirred and mixed, and then subjected to ultrasonic dispersion treatment while cooling the container with water to obtain a coating liquid 9.
  • a projection film 9 was produced in the same manner as in Example 1 except that the coating liquid 9 was used and the coating thickness was 2.4 ⁇ m.
  • Example 5 75 parts of polystyrene particle suspension (manufactured by Polysciences, amino group modification, average particle diameter of particles: 0.5 ⁇ m, solid content concentration: 2.5 mass%) is used, and the amount of tetraethoxysilane is 6.0. Hollow silica particles were produced in the same manner as in Example 3 except that the part was changed to the part.
  • the hollow silica particles prepared above: 7.5 parts and the solvent (methyl ethyl ketone): 42.5 parts were sufficiently stirred and mixed to prepare a hollow silica particle suspension.
  • ultrasonic dispersion treatment was further performed while the container was cooled with water to obtain a coating solution 10.
  • a projection film 10 was produced in the same manner as in Example 1 except that the coating solution 10 was used and the coating thickness was 0.78 ⁇ m.
  • Example 6 A coating solution 1 prepared in Example 1 using a 100 ⁇ m-thick cyclic olefin resin film (manufactured by Zeon Corporation, trade name “Zeonor film ZF14-100”, glass transition temperature: 136 ° C.) instead of the PET film.
  • a projection film 11 was produced in the same manner as in Example 1 except that was used.
  • ⁇ Tear resistance> First, the end surfaces of the projection film were held at positions where the thumbs and the index fingers contact each other so that the thumbs and index fingers of both hands pinch. Next, the projection film was torn by twisting both hands in the opposite direction. As a result, the tear resistance was judged to be good when the film was not cut, and the tear resistance was judged to be poor when the film was cut.
  • the projection films produced in Examples 1 to 5, Comparative Examples 1 to 6 and Reference Example were attached to a float glass plate having a length of 50 mm, a width of 50 mm, and a thickness of 3 mm, with the resin layer facing outside, and evaluated.
  • a sample was used.
  • a 20 ⁇ m-thick substrate-less optical adhesive tape manufactured by Hitachi Maxell, “highly transparent substrate-less double-sided tape No. 5075” was used.
  • the characteristics of the evaluation samples were evaluated as follows.
  • ⁇ Abrasion resistance> The projection film side of the sample for evaluation was rubbed with a squeegee three times to check for scratches. As a result, when the number of scratches was 2 or less, the scratch resistance was judged to be good, and when the number of scratches was 3 or more, the scratch resistance was judged to be poor.
  • Total light transmittance and haze The sample for evaluation was measured for total light transmittance and haze by a method corresponding to Japanese Industrial Standard (JIS) K7361-1, using a turbidimeter “NDH2000” manufactured by Nippon Denshoku Industries Co., Ltd.
  • Table 1 also shows the content, type and coating thickness of the hollow silica particles used.
  • Comparative Example 1 uses a cyclic olefin-based resin film as a base material, so that the tear resistance is inferior, and since solid particles are used, the total light transmittance is reduced as compared with Examples 1-5. did. Comparative Example 2 was inferior in scratch resistance because the amount of hollow particles added exceeded 150 parts by mass. In Comparative Example 3, since the amount of hollow particles added was less than 10 parts by mass, the total light transmittance was reduced as compared with Examples 1-5. In Comparative Example 4, since the porosity of the hollow particles was less than 20% by volume, the total light transmittance was lower than in Examples 1-5.
  • Comparative Example 5 since the average particle diameter of the hollow particles exceeded 500 nm, the total light transmittance was lowered, and the coating thickness was less than twice that of the hollow particles, so that the scratch resistance was inferior. Furthermore, since the average particle diameter of the hollow particles used in Comparative Example 5 was 562 nm, which was larger than other particles, the haze value was high and the transparency was poor. In Comparative Example 6, since a cyclic olefin-based resin film having a glass transition temperature exceeding 95 ° C. was used as the base material of the projection film, the tear resistance was inferior.
  • the present invention can provide a projection film excellent in tear resistance, scratch resistance and optical properties, can realize a projection screen excellent in visibility and transparency, and can be used as a screen for various projectors.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Polymerisation Methods In General (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Abstract

Un film de projection d'après la présente invention contient une couche de résine disposée sur au moins une surface d'un substrat. Le substrat est constitué d'un film de résine ayant une température de transition vitreuse inférieure ou égale à 95 °C. La couche de résine contient des particules creuses et une résine. Le diamètre moyen des particules primaires des particules creuses est compris entre 30 nm et 500 nm (limites comprises). La porosité des particules creuses est comprise entre 20 % en volume et 95 % en volume (limites comprises). La teneur en particules creuses est comprise entre 10 parties en masse et 150 parties en masse par rapport à 100 parties en masse de la résine. L'épaisseur de la couche de résine est supérieure ou égale au double du diamètre moyen des particules creuses.
PCT/JP2017/009978 2017-03-13 2017-03-13 Composition de formation d'un film de projection, film de projection et écran de projection WO2018167823A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008250345A (ja) * 2001-04-06 2008-10-16 Three M Innovative Properties Co 投影スクリーンを用いた情報提供方法
JP4847329B2 (ja) * 2004-08-10 2011-12-28 株式会社きもと 透過型スクリーン
JP2012212092A (ja) * 2011-03-24 2012-11-01 Mitsubishi Paper Mills Ltd 透視可能な透過型スクリーン及びその製造方法
JP2015232630A (ja) * 2014-06-10 2015-12-24 平岡織染株式会社 透過投映スクリーン
JP2015232629A (ja) * 2014-06-10 2015-12-24 平岡織染株式会社 透過投映スクリーン
JP2016018195A (ja) * 2014-07-11 2016-02-01 旭硝子株式会社 映像表示システムおよび映像表示方法
JP2016109778A (ja) * 2014-12-03 2016-06-20 旭硝子株式会社 透過型透明スクリーン、映像表示システムおよび映像表示方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008250345A (ja) * 2001-04-06 2008-10-16 Three M Innovative Properties Co 投影スクリーンを用いた情報提供方法
JP4847329B2 (ja) * 2004-08-10 2011-12-28 株式会社きもと 透過型スクリーン
JP2012212092A (ja) * 2011-03-24 2012-11-01 Mitsubishi Paper Mills Ltd 透視可能な透過型スクリーン及びその製造方法
JP2015232630A (ja) * 2014-06-10 2015-12-24 平岡織染株式会社 透過投映スクリーン
JP2015232629A (ja) * 2014-06-10 2015-12-24 平岡織染株式会社 透過投映スクリーン
JP2016018195A (ja) * 2014-07-11 2016-02-01 旭硝子株式会社 映像表示システムおよび映像表示方法
JP2016109778A (ja) * 2014-12-03 2016-06-20 旭硝子株式会社 透過型透明スクリーン、映像表示システムおよび映像表示方法

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