JP2007203473A - Composite sheet - Google Patents
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- JP2007203473A JP2007203473A JP2006021755A JP2006021755A JP2007203473A JP 2007203473 A JP2007203473 A JP 2007203473A JP 2006021755 A JP2006021755 A JP 2006021755A JP 2006021755 A JP2006021755 A JP 2006021755A JP 2007203473 A JP2007203473 A JP 2007203473A
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- composite sheet
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- fibrous filler
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- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 239000011521 glass Substances 0.000 claims abstract description 59
- 239000011347 resin Substances 0.000 claims abstract description 57
- 229920005989 resin Polymers 0.000 claims abstract description 57
- 239000012765 fibrous filler Substances 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 238000002834 transmittance Methods 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 8
- 239000003822 epoxy resin Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 7
- 229920000647 polyepoxide Polymers 0.000 description 7
- 230000035882 stress Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000088 plastic resin Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical group C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 239000011951 cationic catalyst Substances 0.000 description 1
- 238000010538 cationic polymerization reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- -1 cyclic cycloolefin Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical compound C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
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- Laminated Bodies (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
本発明は表示用基板に使用される複合シートに関するものである。 The present invention relates to a composite sheet used for a display substrate.
一般に、液晶表示素子や有機EL表示素子用基板、カラーフィルター基板、太陽電池基板等の基板としてはガラス板が広く用いられている。
何故ならばガラス板は透明性、耐熱性、耐薬品性、寸法精度、表面平滑性等が優れているからである。またガラス基板は通常のプラスチックフィルムを用いたディスプレイ基板と比較し光学的異方性（リタデーション）が低く、特に表示素子用基板として好適に用いられている。
近年、大型ディスプレイ分野においてはマザーガラスのパネル取り数を向上させるため、大きさが大きくなっている。このガラス板は耐衝撃性が低く一定厚み以下にすると割れやすくなり製造現場における歩留まりが著しく低下するという欠点をしている。
一方、中型、小型ディスプレイ分野においても小型化、軽量化、薄型化が強く求められており厚みの薄いガラスが用いられているが、大型ディスプレイ分野と同様、一定厚み以下では耐衝撃性が低く、割れやすくなる。
このような薄型のガラス基板の耐衝撃性を向上させる方法としては、少なくともガラスの片面にポリマー層を形成する方法（特許文献１、２）、同様に金属酸化物が主成分であるポリマー層を表面に形成する方法（特許文献３）。
これらの方法を適用することによりガラス板単体と比較し耐衝撃性は向上する。しかしながら、その硬化は不十分であり更なる耐衝撃性の向上が望まれている。
In general, glass plates are widely used as substrates for liquid crystal display elements, organic EL display element substrates, color filter substrates, solar cell substrates and the like.
This is because the glass plate is excellent in transparency, heat resistance, chemical resistance, dimensional accuracy, surface smoothness and the like. Further, the glass substrate has a lower optical anisotropy (retardation) than a display substrate using a normal plastic film, and is particularly suitably used as a substrate for a display element.
In recent years, in the large display field, the size has been increased in order to improve the number of mother glass panels. This glass plate has a drawback that it has a low impact resistance and is liable to break when the thickness is not more than a certain thickness, so that the yield at the manufacturing site is remarkably lowered.
On the other hand, in the medium and small display fields, downsizing, lightening, and thinning are strongly demanded and thin glass is used, but as in the large display field, impact resistance is low below a certain thickness, It becomes easy to break.
As a method for improving the impact resistance of such a thin glass substrate, there is a method of forming a polymer layer on at least one side of the glass (Patent Documents 1 and 2), and similarly a polymer layer mainly composed of a metal oxide. A method of forming on the surface (Patent Document 3).
By applying these methods, the impact resistance is improved as compared with a single glass plate. However, its curing is insufficient and further improvement in impact resistance is desired.
本発明は表示用基板に使用されるガラス板の耐衝撃性、耐貫通性を向上させることを目的とする。 An object of the present invention is to improve the impact resistance and penetration resistance of a glass plate used for a display substrate.
本発明は、
（１）表示用基板に使用される複合シートであって、厚み１０〜１０００μｍのガラスシートの少なくとも片面に繊維状フィラーを含む厚み２０〜２００μｍの樹脂層を設けてなり、前記樹脂層の線膨張係数が３０ｐｐｍ以下である複合シート、
（２）前記繊維状フィラーがガラス繊維である（１）記載の複合シート、
（３）前記繊維状フィラーがガラスクロスである（１）記載の複合シート、
（４）全光線透過率が８０％以上である（１）〜（３）いずれか記載の複合シート、
（５）前記樹脂層に用いられる樹脂の硬化後の屈折率と前記繊維状フィラーとの屈折率との差が０．０１以下である（１）〜（４）いずれか記載の複合シート、
である。
The present invention
(1) A composite sheet used for a display substrate, wherein a resin layer having a thickness of 20 to 200 μm including a fibrous filler is provided on at least one surface of a glass sheet having a thickness of 10 to 1000 μm, and the linear expansion of the resin layer A composite sheet having a coefficient of 30 ppm or less,
(2) The composite sheet according to (1), wherein the fibrous filler is glass fiber,
(3) The composite sheet according to (1), wherein the fibrous filler is a glass cloth,
(4) The composite sheet according to any one of (1) to (3), wherein the total light transmittance is 80% or more,
(5) The composite sheet according to any one of (1) to (4), wherein the difference between the refractive index after curing of the resin used for the resin layer and the refractive index of the fibrous filler is 0.01 or less,
It is.
本発明にかかる複合シートを表示用ディスプレイ基板に使用した場合、軽量で耐衝撃性、耐貫通性に強いディスプレイを提供することが可能である。 When the composite sheet according to the present invention is used for a display substrate for display, it is possible to provide a display that is lightweight and has high impact resistance and penetration resistance.
以下、本発明を詳細に説明する。
本発明は、表示用基板に使用される複合シートであって、厚み１０〜１０００μｍのガラスシートの少なくとも片面に繊維状フィラーを含む厚み２０〜２００μｍの樹脂層を設けてなり、前記樹脂層の線膨張係数が３０ｐｐｍ以下である複合シートに関するものである。
Hereinafter, the present invention will be described in detail.
The present invention is a composite sheet used for a display substrate, wherein a glass layer having a thickness of 20 to 200 μm including a fibrous filler is provided on at least one surface of a glass sheet having a thickness of 10 to 1000 μm. The present invention relates to a composite sheet having an expansion coefficient of 30 ppm or less.
本発明に用いられるガラスシートとしては、特に限定されるものではなく通常表示基板等に用いられるガラス板を用いることができるが、厚みとしては１０μｍ以上１０００μｍ以下のものが必要である。何故ならば厚みが上限値を超える場合、ガラス板のみでも耐衝撃性が向上し、繊維状フィラーを含む樹脂層の補強の必要性が低減するからである。 The glass sheet used in the present invention is not particularly limited, and a glass plate usually used for a display substrate or the like can be used, but a thickness of 10 μm or more and 1000 μm or less is required. This is because, when the thickness exceeds the upper limit, the impact resistance is improved only by the glass plate, and the necessity for reinforcing the resin layer containing the fibrous filler is reduced.
本発明に用いられる繊維状フィラーを含む樹脂層中の繊維状フィラーとしては、特に限定されるものではないが、表示素子用基板のように透明性が重視されるような用途に用いる場合には繊維状フィラーの形状によって、以下のような制限が必要である。何故ならば繊維状フィラーと樹脂との界面において散乱を生じた場合、ヘイズが大きくなり透明性が低下するからである。 Although it does not specifically limit as a fibrous filler in the resin layer containing the fibrous filler used for this invention, When using for the use where transparency is considered important like a display element substrate. The following restrictions are necessary depending on the shape of the fibrous filler. This is because when scattering occurs at the interface between the fibrous filler and the resin, haze increases and transparency decreases.
例えば繊維の屈折率に関して言えば、繊維の屈折率は、直径が１００ｎｍ以下であれば繊維状フィラーとマトリックス樹脂との界面における散乱が小さいので特に限定されない。しかし繊維状フィラーの直径が１００ｎｍを超える場合は材料間の屈折率差が原因で生じる繊維と樹脂との界面における散乱を抑制するため、繊維の屈折率としては１．４〜１．６が好ましく、特に１．５０〜１．５５が好ましい。何故ならば繊維の屈折率が前記範囲内であると、繊維材料のアッベ数に近い透明樹脂を選択することができるのからである。また透明樹脂のアッベ数とガラスのアッベ数が近いほど広い波長領域で屈折率が一致し、広範囲で高い光線透過率が得られるからである。特に、樹脂層に用いられる樹脂の硬化後の屈折率と繊維状フィラーとの屈折率との差が０．０１以下であることが好ましい。 For example, regarding the refractive index of the fiber, the refractive index of the fiber is not particularly limited as long as the diameter is 100 nm or less because scattering at the interface between the fibrous filler and the matrix resin is small. However, when the diameter of the fibrous filler exceeds 100 nm, the fiber refractive index is preferably 1.4 to 1.6 in order to suppress scattering at the interface between the fiber and the resin caused by the difference in refractive index between materials. In particular, 1.50 to 1.55 is preferable. This is because when the refractive index of the fiber is within the above range, a transparent resin close to the Abbe number of the fiber material can be selected. Further, the closer the Abbe number of the transparent resin and the Abbe number of the glass, the higher the refractive index in a wide wavelength region, and the higher light transmittance can be obtained in a wide range. In particular, the difference between the refractive index after curing of the resin used for the resin layer and the refractive index of the fibrous filler is preferably 0.01 or less.
本発明で用いる繊維状フィラーとしては、限定されるものではないがナノ繊維、ガラス繊維のクロスや不織布などの繊維布などが挙げられ、ガラスクロスが好ましい。 Examples of the fibrous filler used in the present invention include, but are not limited to, nanofibers, fiber cloths such as glass fiber cloths and nonwoven fabrics, and glass cloths are preferred.
ガラス繊維の場合、ガラスの種類としてはEガラス、Cガラス、Aガラス、Sガラス、Tガラス、Dガラス、NEガラス、クオーツ、低誘電率ガラス、高誘電率ガラスなどが上げられ、中でもアルカリ金属などのイオン性不純物が少なく入手の容易なEガラス、Sガラス、TガラスNEガラスが好ましい。 In the case of glass fiber, glass types include E glass, C glass, A glass, S glass, T glass, D glass, NE glass, quartz, low dielectric constant glass, high dielectric constant glass, etc. E glass, S glass, and T glass NE glass, which have few ionic impurities and are easily available, are preferable.
本発明に用いられる繊維状フィラーを含む樹脂層中の樹脂としては特に限定されるものではなく、可塑性樹脂や硬化性樹脂等の高分子材料が挙げられる。
可塑性樹脂としては環状シクロオレフィン系樹脂、シリコーン系樹脂、ポリカーボネート系樹脂、ポリイミド樹脂、ポリエーテルサルホン樹脂、ポリアリレート樹脂などが挙げられる。
It does not specifically limit as resin in the resin layer containing the fibrous filler used for this invention, Polymer materials, such as a plastic resin and a curable resin, are mentioned.
Examples of the plastic resin include cyclic cycloolefin resins, silicone resins, polycarbonate resins, polyimide resins, polyether sulfone resins, polyarylate resins, and the like.
硬化性樹脂としては硬化後透明なエポキシ樹脂、アクリル樹脂、ポリイミド樹脂、オキセタン樹脂などが挙げられるが、できるだけ線膨張率が低い樹脂が好ましい。本発明において硬化後の樹脂の線膨張率は、３０ｐｐｍ以下であることが必要であり、２０ｐｐｍ以下であることが好ましい。。
何故ならば樹脂の線膨張率が小さいほど繊維状フィラーを含む樹脂層の線膨張率が小さくなり、ガラス板と樹脂層との間で生じる応力抑制され、その結果、複合シート自身のうねり、反りが低減されるからである。また、樹脂の線膨張率が小さいほど繊維状フィラーと樹脂との線膨張差が小さくなることで繊維状フィラーと樹脂との界面で生じる常温における応力が低減され、複屈折の低減ができるからである。この複屈折は低ければ低いほど良い。何故ならば複屈折が大きい場合、この複合シートを液晶用表示素子基板として用いると表示性能が悪化するからである。
Examples of the curable resin include a transparent epoxy resin after curing, an acrylic resin, a polyimide resin, and an oxetane resin, and a resin having a linear expansion coefficient as low as possible is preferable. In the present invention, the linear expansion coefficient of the cured resin is required to be 30 ppm or less, and preferably 20 ppm or less. .
This is because the smaller the linear expansion coefficient of the resin, the smaller the linear expansion coefficient of the resin layer containing the fibrous filler, and the stress generated between the glass plate and the resin layer is suppressed. As a result, the composite sheet itself swells and warps. It is because is reduced. In addition, the smaller the linear expansion coefficient of the resin, the smaller the difference in linear expansion between the fibrous filler and the resin, thereby reducing the stress at normal temperature generated at the interface between the fibrous filler and the resin and reducing birefringence. is there. The lower the birefringence, the better. This is because when the birefringence is large, the display performance deteriorates when this composite sheet is used as a liquid crystal display element substrate.
さらに、低温で硬化可能な樹脂が好ましい。何故ならば低温で硬化すればするほどガラス板と樹脂層との界面で生じる応力が小さく複合体の反りを低減でき、また繊維状フィラーと樹脂との界面で生じる応力が低減され、複屈折の低減ができるからである。
ただし、うねり、反りに関しては、硬化後の樹脂の弾性率が低く、ガラスと樹脂層との間に生じた応力を緩和可能であれば樹脂の線膨張率、及び硬化温度に特に制限はない。
一方、複屈折性については樹脂の弾性率が低くなり応力が低減されても分子の配向が発生し、複屈折が生じる可能性があるため上記のような低温で硬化しかつ線膨張係数が低い樹脂が好ましい。
Furthermore, a resin curable at a low temperature is preferable. This is because the lower the temperature, the lower the stress generated at the interface between the glass plate and the resin layer, and the less the composite warp, and the lower the stress generated at the interface between the fibrous filler and the resin. This is because it can be reduced.
However, with regard to swell and warp, there is no particular limitation on the linear expansion coefficient of the resin and the curing temperature as long as the elastic modulus of the resin after curing is low and the stress generated between the glass and the resin layer can be relaxed.
On the other hand, with regard to birefringence, even if the elastic modulus of the resin is low and the stress is reduced, molecular orientation occurs and birefringence may occur, so it cures at a low temperature as described above and has a low coefficient of linear expansion. Resins are preferred.
具体的にはビフェニル骨格を有する骨格を有する脂環式エポキシ樹脂、ビスフェノールＡ型骨格を有する脂環式エポキシ樹脂などが挙げられる。何故ならばこれらの樹脂はカチオン系触媒を使用しカチオン重合すると他の樹脂よりも低温で硬化し、かつ硬化物の線膨張率も低いからである。 Specific examples include an alicyclic epoxy resin having a skeleton having a biphenyl skeleton and an alicyclic epoxy resin having a bisphenol A skeleton. This is because these resins are cured at a lower temperature than other resins by cationic polymerization using a cationic catalyst, and the linear expansion coefficient of the cured product is low.
樹脂層の厚みとしては、一般には薄型化が要求されているため本発明においては２０μｍ〜２００μｍである。 The thickness of the resin layer is generally 20 μm to 200 μm in the present invention because it is generally required to be thin.
ガラスシートと繊維状フィラーを含む樹脂層との積層は、接着剤を用いて積層する方法、粘着剤を用いて積層する方法、繊維布に樹脂を含浸させ、ガラス板にラミネートし熱可塑性樹脂の場合は固化させ、硬化性樹脂の場合は硬化させ積層する方法など適宜な方式で積層することができる。 Lamination of a glass sheet and a resin layer containing a fibrous filler includes a method of laminating using an adhesive, a method of laminating using an adhesive, impregnating a fiber cloth with a resin, laminating it on a glass plate, In the case of curable resin, it can be laminated by an appropriate method such as a method of curing and laminating.
また複合シートとして赤外線防止機能、紫外線防止機能等を発現させるために樹脂層に適宜赤外線吸収剤、紫外線吸収剤等を添加することができる。 In addition, an infrared absorber, an ultraviolet absorber, or the like can be appropriately added to the resin layer in order to develop an infrared ray preventing function, an ultraviolet ray preventing function, etc. as the composite sheet.
また、複合体中の樹脂層の表面平坦性が劣る場合は、平坦性向上のためさらにコート層を設けることも出来る。 Moreover, when the surface flatness of the resin layer in the composite is inferior, a coating layer can be further provided for improving the flatness.
以下、実施例を示して本発明をさらに説明するが、本発明はこれらの実施例にのみ限定されるものではない。 EXAMPLES Hereinafter, the present invention will be further described with reference to examples. However, the present invention is not limited only to these examples.
〔実施例１〕ガラスクロス（日東紡製ＮＥＡ−２３１９、厚み９０μｍ、屈折率１．５０３）にエポキシ樹脂を含浸、硬化させ（硬化後の樹脂の屈折率１．５０８）厚み９０μｍのガラスクロス複合体を作成する。このガラスクロス複合体シートを接着剤を介して、厚さ１００μｍのガラス板の片面にラミネート接着し、複合シートを得た。 [Example 1] Glass cloth (Nittobo NEA-2319, thickness 90 μm, refractive index 1.503) impregnated with epoxy resin and cured (refractive index 1.508 of cured resin) glass cloth composite with thickness 90 μm Create a body. This glass cloth composite sheet was laminated and bonded to one side of a glass plate having a thickness of 100 μm through an adhesive to obtain a composite sheet.
〔実施例２〕ガラスクロス（日東紡製ＮＥＡ−２３１９、厚み９０μｍ、屈折率１．５０３）にエポキシ樹脂を含浸後させ未硬化の状態で厚み１００μｍのガラス板の片面にラミネートし、ラミネート後樹脂を硬化させ（硬化後の樹脂の屈折率１．５０８）、複合シートを得た。 [Example 2] A glass cloth (NEA-2319 manufactured by Nittobo Co., Ltd., thickness 90 μm, refractive index 1.503) was impregnated with an epoxy resin and laminated on one side of a 100 μm thick glass plate in an uncured state. Was cured (refractive index of the cured resin 1.508) to obtain a composite sheet.
〔実施例３〕ガラスクロス（日東紡製ＮＥＡ−２３１９、厚み９０μｍ、屈折率１．５０３）にエポキシ樹脂を含浸、硬化させ（硬化後の樹脂の屈折率１，５０８）厚み９０μｍのガラスクロス複合体を作製する。このガラスクロス複合シートを接着剤を介して厚み１００μｍのガラス板の両面にラミネートし、複合シートを得た。 [Example 3] Glass cloth composite with glass cloth (Nittobo NEA-2319, thickness 90 μm, refractive index 1.503) impregnated with epoxy resin and cured (refractive index 1,508 of cured resin) 90 μm thick Create a body. This glass cloth composite sheet was laminated on both surfaces of a 100 μm thick glass plate via an adhesive to obtain a composite sheet.
〔比較例１〕ガラスクロスを使用せずに厚み１００μｍのエポキシ樹脂シートを作製し、厚み１００μｍのガラス板の片面に接着剤を介して接着し複合シートを得た。
〔比較例２〕厚みが２００μｍのガラス板に何の処理もせず比較例２とした。
[Comparative Example 1] An epoxy resin sheet having a thickness of 100 µm was prepared without using a glass cloth, and a composite sheet was obtained by adhering to one side of a glass plate having a thickness of 100 µm via an adhesive.
[Comparative Example 2] A glass plate having a thickness of 200 µm was treated as Comparative Example 2 without any treatment.
以上のようにして作成した複合シート、および複合体の樹脂層について下記に示す評価方法により各種特性を測定した。結果を表１に示す。
ａ）全光線透過率
分光光度計Ｕ３２００（日立製作所製）で波長５５０ｎｍにおける複合シートの全光線透過率を測定した。
ｂ）屈折率
アタゴ社製アッベ屈折率系ＤＲ−Ｍ２を用いて２５℃で５８９ｎｍにおける樹脂層に用いられる樹脂の屈折率を測定した。
ｃ）線膨張係数
ＳＥＩＫＯ電子（株）製ＴＭＡ／ＳＳ６０００型熱応力歪み測定装置を用いて、窒素雰囲気下、1分間に５℃の割合で昇温させ、荷重を５ｇで、引っ張りモードで測定を行い、３０℃〜２５０℃の温度範囲における樹脂層の線膨張係数を算出した。
ｄ）耐衝撃性試験
５０ｇの鉄球を任意の高さから複合シートに落下させ、ガラス板が破損し始める高さを測定した。
Various characteristics of the composite sheet prepared as described above and the resin layer of the composite were measured by the evaluation methods described below. The results are shown in Table 1.
a) Total light transmittance The total light transmittance of the composite sheet at a wavelength of 550 nm was measured with a spectrophotometer U3200 (manufactured by Hitachi, Ltd.).
b) Refractive index The refractive index of the resin used for the resin layer at 589 nm at 25 ° C. was measured using an Abbe refractive index system DR-M2 manufactured by Atago Co., Ltd.
c) Linear expansion coefficient Using a TMA / SS6000 type thermal stress strain measuring device manufactured by SEIKO ELECTRONICS CO., LTD. The linear expansion coefficient of the resin layer in the temperature range of 30 ° C. to 250 ° C. was calculated.
d) Impact resistance test A 50 g iron ball was dropped onto the composite sheet from an arbitrary height, and the height at which the glass plate started to break was measured.
実施例で得られた複合シートは従来の薄型ガラス以上の耐衝撃性を有し、かつ従来ガラス並みの光線透過率を有する、優れたものであった。 The composite sheets obtained in the examples were excellent in that they had impact resistance higher than that of conventional thin glass and had light transmittance equivalent to that of conventional glass.
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| JP2007203474A (en) * | 2006-01-31 | 2007-08-16 | Sumitomo Bakelite Co Ltd | Transparent resin laminated sheet |
| JP2008222465A (en) * | 2007-03-09 | 2008-09-25 | Swancor Ind Co Ltd | Glass reinforcement structure |
| JP2009019160A (en) * | 2007-07-13 | 2009-01-29 | Teijin Ltd | Optical film, and optical display |
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| JP2008222465A (en) * | 2007-03-09 | 2008-09-25 | Swancor Ind Co Ltd | Glass reinforcement structure |
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