JP5220287B2 - Optical function sheet and manufacturing method thereof - Google Patents
Optical function sheet and manufacturing method thereof Download PDFInfo
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- JP5220287B2 JP5220287B2 JP2006173470A JP2006173470A JP5220287B2 JP 5220287 B2 JP5220287 B2 JP 5220287B2 JP 2006173470 A JP2006173470 A JP 2006173470A JP 2006173470 A JP2006173470 A JP 2006173470A JP 5220287 B2 JP5220287 B2 JP 5220287B2
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- 230000003287 optical effect Effects 0.000 title claims description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000010410 layer Substances 0.000 claims description 157
- 229920005989 resin Polymers 0.000 claims description 88
- 239000011347 resin Substances 0.000 claims description 88
- 230000005865 ionizing radiation Effects 0.000 claims description 75
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 26
- 238000006116 polymerization reaction Methods 0.000 claims description 17
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 239000003112 inhibitor Substances 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 13
- 239000002390 adhesive tape Substances 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000011800 void material Substances 0.000 claims description 11
- 230000001678 irradiating effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000001723 curing Methods 0.000 claims 5
- 238000003847 radiation curing Methods 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 description 14
- -1 N, N-diglycidylaminomethyl Chemical group 0.000 description 12
- 230000005855 radiation Effects 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 9
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- NNNLYDWXTKOQQX-UHFFFAOYSA-N 1,1-di(prop-2-enoyloxy)propyl prop-2-enoate Chemical compound C=CC(=O)OC(CC)(OC(=O)C=C)OC(=O)C=C NNNLYDWXTKOQQX-UHFFFAOYSA-N 0.000 description 1
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- 150000005208 1,4-dihydroxybenzenes Chemical class 0.000 description 1
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- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
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- JHWGFJBTMHEZME-UHFFFAOYSA-N 4-prop-2-enoyloxybutyl prop-2-enoate Chemical compound C=CC(=O)OCCCCOC(=O)C=C JHWGFJBTMHEZME-UHFFFAOYSA-N 0.000 description 1
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- GWGWXYUPRTXVSY-UHFFFAOYSA-N N=C=O.N=C=O.CC1=CC=C(C)C=C1 Chemical compound N=C=O.N=C=O.CC1=CC=C(C)C=C1 GWGWXYUPRTXVSY-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 1
- INXWLSDYDXPENO-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(CO)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C INXWLSDYDXPENO-UHFFFAOYSA-N 0.000 description 1
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
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- 150000001541 aziridines Chemical class 0.000 description 1
- 125000004069 aziridinyl group Chemical group 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 150000004054 benzoquinones Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
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- RJLZSKYNYLYCNY-UHFFFAOYSA-N ethyl carbamate;isocyanic acid Chemical group N=C=O.CCOC(N)=O RJLZSKYNYLYCNY-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 229920000728 polyester Polymers 0.000 description 1
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- 239000005020 polyethylene terephthalate Substances 0.000 description 1
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Images
Description
本発明は液晶ディスプレイ、特に外光の反射光を利用して画像表示を行う反射型あるいは透過反射型の液晶ディスプレイに使用されるシート、投射型テレビに用いるレンズシートやプラズマディスプレイパネルに用いる電磁波遮蔽シートおよびその製造方法に関する。 The present invention relates to a liquid crystal display, particularly a sheet used in a reflective or transflective liquid crystal display that displays an image using reflected light of outside light, a lens sheet used in a projection television, and an electromagnetic wave shield used in a plasma display panel. The present invention relates to a sheet and a manufacturing method thereof.
液晶プロジェクターを用いる単管式の液晶プロジェクションテレビに代表される透過型液晶表示装置には、フレネルレンズシートとの組み合わせにより透過型スクリーン を構成するレンチキュラーシートが用いられている。
前記レンチキュラーシートは、透明シートのレンズの反対面に数十μｍ幅のブラックストライプが形成されたシートや、凹凸の透明部を有し奥部には黒色剤を埋め込み数十μｍ幅のブラックストライプを形成するシートを使用するのが一般的である。これらのレンズシートを作製するにあたり、ブラックストライプを設けたい面に紫外線硬化型粘着層を設け、その粘着層をシートの背面から照射した紫外光の集光を活用して集光部のみ粘着層を硬化させて、未硬化部分に黒色剤を貼合させる方法が提案されている（例えば、特許文献１および２参照）。
In a transmissive liquid crystal display device represented by a single tube type liquid crystal projection television using a liquid crystal projector, a lenticular sheet constituting a transmissive screen in combination with a Fresnel lens sheet is used.
The lenticular sheet is a sheet with a black stripe with a width of several tens of μm formed on the opposite side of the lens of the transparent sheet, or a black stripe with a width of several tens of μm embedded with a black agent in the back and having an uneven transparent part. It is common to use the sheet to be formed. In producing these lens sheets, an ultraviolet curable adhesive layer is provided on the surface where the black stripe is to be provided, and the adhesive layer is applied only to the condensing part by utilizing the condensing of ultraviolet light irradiated from the back surface of the sheet. A method of curing and bonding a black agent to an uncured portion has been proposed (see, for example,
しかしこれらの方法では入射光の平行性など、入射光の方向の厳密な制御が必要とされ、平行からはずれた光が硬化/未硬化境界をぼやかし、また集光部以外にも光が漏れる事が多く、粘着層への反射材の転写の制御が困難であるという問題点があった。
また本来、黒色剤や反射材の付着を予定しない硬化部に黒色剤や反射材が転写されたり、未硬化部分も予定に反し、その粘着力も低下するという問題点があった。
However, these methods require strict control of the direction of the incident light, such as the parallelism of the incident light, and light that deviates from the parallel blurs the hardened / uncured boundary, and light leaks to other than the condensing part. There is a problem that it is difficult to control the transfer of the reflective material to the adhesive layer.
In addition, there is a problem that the black agent or the reflective material is originally transferred to the cured portion where the black agent or the reflective material is not expected to adhere, and the uncured portion is contrary to the plan, and the adhesive force is also reduced.
そこで、本発明者等は、上記課題を解決するために鋭意検討した結果、片面に凹凸面を有し、該凹凸面に電離放射線硬化型樹脂層を形成したレンズシートであって、この電離放射線硬化型樹脂層に重合禁止剤を添加することで、面と接していない電離放射線硬化型樹脂層が電離放射線照射後も粘着性を保持することができ、また電離放射線硬化型樹脂層に表面エネルギーを低下させる材料が含まれることで、本来黒色剤や反射材を付着させない硬化部への黒色剤や反射材の付着を抑制出切ることを見出し、凸面と接していない電離放射線硬化型樹脂層が電離放射線照射後も粘着性を確実に保持できることを見いだし、かかる知見に基づき、本発明を完成することに至った。 Therefore, as a result of intensive studies to solve the above-mentioned problems, the present inventors have obtained a lens sheet having an uneven surface on one side and an ionizing radiation curable resin layer formed on the uneven surface, and this ionizing radiation. By adding a polymerization inhibitor to the curable resin layer, the ionizing radiation curable resin layer that is not in contact with the surface can retain its adhesiveness even after irradiation with ionizing radiation, and the surface energy is added to the ionizing radiation curable resin layer. It has been found that the inclusion of a material that lowers the amount of blackening agent and reflective material to suppress the adhesion of the blackening agent and reflective material to the cured part that does not originally adhere the blackening agent and reflective material, and the ionizing radiation curable resin layer not in contact with the convex surface It has been found that the adhesiveness can be reliably maintained even after irradiation, and the present invention has been completed based on this finding.
すなわち本発明は、
（１）片面に凹凸面を有する光学機能シートであって、前記凹凸面の凸面に接するように電離放射線硬化型樹脂層が形成され、前記電離放射線硬化型樹脂層は、前記電離放射線硬化型樹脂層の表面エネルギーを低下させる材料および／または重合禁止剤を含有し、前記凹凸面の凹面と前記電離放射線硬化型樹脂層の間には空隙が形成されており、前記凸面と接していない前記電離放射線硬化型樹脂層は未硬化層であり、当該未硬化層上に着色層が形成され、前記凸面と接触した部分の前記電離放射線硬化型樹脂層は、電離放射線照射により硬化していることを特徴とする光学機能シート、
（２）（ａ）片面に凹凸面を有する集光シートの該凹凸面の凸面には接するが凹面には空隙を形成するように表面エネルギーを低下させる材料および／または重合禁止剤を含有する電離放射線硬化型樹脂層を形成する工程、（ｂ）電離放射線を照射することにより該凸面に接した前記電離放射線硬化型樹脂層を硬化する工程、（ｃ）前記電離放射線硬化型樹脂層に着色層が形成された転写シートを重ね合わせ、前記着色層を未硬化部分に付着させ、硬化部分の着色層を光学機能シートから剥離することにより着色層パターンを有する光学機能シートの製造方法、
（３）（ａ）片面に凹凸面を有する集光シートの該凹凸面の凸面には接するが凹面には空隙を形成するように表面エネルギーを低下させる材料および／または重合禁止剤を含有する電離放射線硬化型樹脂層を形成する工程、（ｂ）電離放射線を照射することにより該凸面に接した前記電離放射線硬化型樹脂層を硬化する工程、（ｃ）前記電離放射線硬化型樹脂層全面に着色層が形成された転写シートを重ね合わせ、前記着色層を未硬化部分にのみ付着させ、硬化部分の着色層を光学機能シートから剥離する工程、（ｄ）着色層の下の未硬化層を硬化することにより着色層パターンを有する光学機能シートの製造方法、
（４）（ａ）片面に凹凸面を有するシートに、表面エネルギーを低下させる材料および／または重合禁止剤を含有する電離放射線硬化型樹脂を粘着層として有する粘着テープを貼合し、前記凹凸面の凸面を前記粘着層に接触させるとともに、前記凹凸面の凹面を前記粘着層に接触させずに当該凹面上に空隙を形成する工程、（ｂ）電離放射線を照射することにより該凸面に接した該粘着層を硬化する工程、（ｃ）該粘着テープを該凹凸シート側から剥離する工程、（ｄ）該粘着テープの粘着層に着色層が形成された転写シートを重ね合わせ、前記着色層を未硬化部分にのみ付着させ、硬化部分の着色層を粘着テープから剥離することにより着色層パターンを有する光学機能シートの製造方法、
（５）（ａ）片面に凹凸面を有するシートに、表面エネルギーを低下させる材料および／または重合禁止剤を含有する電離放射線硬化型樹脂を粘着層として有する粘着テープを貼合し、前記凹凸面の凸面を前記粘着層に接触させるとともに、前記凹凸面の凹面を前記粘着層に接触させずに当該凹面上に空隙を形成する工程、（ｂ）電離放射線を照射することにより該凸面に接した該粘着層を硬化する工程、（ｃ）該粘着テープを該凹凸シート側から剥離する工程、（ｄ）該粘着テープの粘着層に着色層が形成された転写シートを重ね合わせ、前記着色層を未硬化部分にのみ付着させ、硬化部分の着色層を粘着テープから剥離する工程、（ｅ）着色層の下の未硬化層を硬化することにより着色層パターンを有する光学機能シートの製造方法、を提供するものである。
上記（１）の発明においては、アクリル系粘着剤と電離放射線重合性化合物とを含むベース樹脂を更に用いて電離放射線硬化型樹脂層を形成することが好ましい。上記（２）、（３）の発明においては、電離放射線硬化型樹脂層に、アクリル系粘着剤と電離放射線重合性化合物とを含むベース樹脂を用いることが好ましく、上記（４）、（５）の発明においては、電離放射線硬化型樹脂に、アクリル系粘着剤と電離放射線重合性化合物とを含むベース樹脂を用いることが好ましい。
なお本発明においては、光学機能シートとは、投射型テレビに用いるレンズシートのほか、液晶ディスプレイ、特に外光の反射光を利用して画像表示を行う反射型あるいは透過反射型の液晶ディスプレイに使用されるシートやプラズマディスプレイパネル等に使用される電磁波遮蔽シートをも総称していうものとする。
That is, the present invention
(1) An optical functional sheet having an uneven surface on one side, the ionizing radiation-curable resin layer in contact with the convex surface of the uneven surface is formed, the ionizing radiation-curable resin layer, the ionizing radiation-curable resin containing material and / or a polymerization inhibitor to lower the surface energy of the layer, the between the concave uneven surface and the ionizing radiation-curable resin layer are voids formed, not in contact with the convex surface the ionization radiation curable resin layer is uncured layer, a colored layer is formed on the uncured layer, wherein the ionizing radiation-curable resin layer in a portion in contact with said convex surface, that it is cured by irradiation of ionizing radiation Optical function sheet,
(2) (a) An ionization material containing a material and / or a polymerization inhibitor that decreases the surface energy so as to form a void in the concave surface but is in contact with the convex surface of the concave / convex surface of the condensing sheet having a concave / convex surface on one side. A step of forming a radiation curable resin layer; (b) a step of curing the ionizing radiation curable resin layer in contact with the convex surface by irradiating with ionizing radiation; and (c) a colored layer on the ionizing radiation curable resin layer. A method for producing an optical functional sheet having a colored layer pattern by superimposing the transfer sheet formed, attaching the colored layer to an uncured portion, and peeling the cured portion of the colored layer from the optical functional sheet,
(3) (a) An ionization material containing a material and / or a polymerization inhibitor that decreases the surface energy so as to form a void in the concave surface but in contact with the convex surface of the concave and convex surface of the condensing sheet having a concave and convex surface on one side. A step of forming a radiation curable resin layer; (b) a step of curing the ionizing radiation curable resin layer in contact with the convex surface by irradiating with ionizing radiation; and (c) coloring the entire surface of the ionizing radiation curable resin layer. A transfer sheet on which layers are formed, a step of attaching the colored layer only to the uncured portion, and peeling the colored layer of the cured portion from the optical function sheet; (d) curing the uncured layer under the colored layer A method for producing an optical functional sheet having a colored layer pattern,
(4) (a) An adhesive tape having an adhesive layer containing an ionizing radiation curable resin containing a material that reduces surface energy and / or a polymerization inhibitor is bonded to a sheet having an uneven surface on one side, and the uneven surface A step of forming a void on the concave surface without bringing the concave surface of the concave-convex surface into contact with the adhesive layer, and (b) contacting the convex surface by irradiating with ionizing radiation. A step of curing the pressure-sensitive adhesive layer, (c) a step of peeling the pressure-sensitive adhesive tape from the concavo-convex sheet side, and (d) superposing a transfer sheet on which a colored layer is formed on the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape, A method for producing an optical functional sheet having a colored layer pattern by attaching only to the uncured portion and peeling the colored layer of the cured portion from the adhesive tape,
(5) (a) An adhesive tape having an adhesive layer containing an ionizing radiation curable resin containing a material for reducing surface energy and / or a polymerization inhibitor is bonded to a sheet having an uneven surface on one side, and the uneven surface A step of forming a void on the concave surface without bringing the concave surface of the concave-convex surface into contact with the adhesive layer, and (b) contacting the convex surface by irradiating with ionizing radiation. A step of curing the pressure-sensitive adhesive layer, (c) a step of peeling the pressure-sensitive adhesive tape from the concavo-convex sheet side, and (d) superposing a transfer sheet on which a colored layer is formed on the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape, A step of attaching only the uncured portion and peeling off the colored layer of the cured portion from the adhesive tape; (e) a method for producing an optical functional sheet having a colored layer pattern by curing the uncured layer under the colored layer; It is to provide.
In the invention described in (1), it is preferable to form a further ionizing radiation curable resin layer using a base resin comprising A acrylic-based adhesive and the ionizing radiation-polymerizable compound. In the inventions of the above (2) and (3) , it is preferable to use a base resin containing an acrylic pressure-sensitive adhesive and an ionizing radiation polymerizable compound for the ionizing radiation curable resin layer. (4), (5) In the invention, it is preferable to use a base resin containing an acrylic pressure-sensitive adhesive and an ionizing radiation polymerizable compound as the ionizing radiation curable resin.
In the present invention, the optical function sheet is used for a liquid crystal display, in particular, a reflective or transflective liquid crystal display for displaying an image using reflected light of outside light, in addition to a lens sheet used for a projection television. Electromagnetic wave shielding sheets used for such sheets and plasma display panels are also generically referred to.
本発明の光学機能シートは、電離性放射線硬化型樹脂層を硬化する際の入射光の厳密な平行性を必要とせず、微細パターンの着色層を高精度で簡便に形成することができ、特にプラズマディスプレイパネル等に使用される電磁波遮蔽シートの場合には、電磁波遮蔽層を簡便に形成することができる。 The optical functional sheet of the present invention does not require strict parallelism of incident light when curing the ionizing radiation curable resin layer, and can easily form a colored layer with a fine pattern with high accuracy. In the case of an electromagnetic wave shielding sheet used for a plasma display panel or the like, an electromagnetic wave shielding layer can be easily formed.
以下、本発明の一実施の形態として透過型スクリーンに使用されるレンズシートを例に図面を参照して説明する。図１は、透過型スクリーンに使用されるレンズシートを概念的に示した説明図である。透過型スクリーンは、フレネルシート（２）とレンズシート（３）とが組み合わされてなる構成であり、光源（プロジェクター）（１）からの投影光（点光源からの発散光に類似する）をフレネルレンズによって平行光とし、レンズシートによって水平方向（シリンドリカルレンズの並設方向）に拡げて観察者側に投影するように機能する。遮光パターン（４）は、レンズシート（３）に形成されることになる。本発明においては、レンズシートのレンズ面とは反対の面は凹凸となっており、当該凹凸面側に着色層が設けられている。 Hereinafter, as an embodiment of the present invention, a lens sheet used in a transmission screen will be described as an example with reference to the drawings. FIG. 1 is an explanatory view conceptually showing a lens sheet used for a transmission type screen. The transmissive screen has a configuration in which a Fresnel sheet (2) and a lens sheet (3) are combined, and the projection light from the light source (projector) (1) (similar to the divergent light from the point light source) is Fresnel. The lens functions as collimated light, and spreads in the horizontal direction (in the direction in which the cylindrical lenses are arranged side by side) by the lens sheet and projected onto the viewer side. The light shielding pattern (4) is formed on the lens sheet (3). In the present invention, the surface of the lens sheet opposite to the lens surface is uneven, and a colored layer is provided on the uneven surface side.
このような光学機能シートの製造工程を示したのが図２である。まず両面が離型フィルムで挟まれた電離放射線硬化型樹脂テープを用意する。この電離放射線硬化型樹脂層を以下、単に樹脂層ともいう。
このテープの片面の離型フィルムを剥離し、片面に凹凸面を有する光学機能シートの凹凸面に、当該テープを貼合する。そうすると凸部にテープは接触し、凹部には空隙ができる。この状態で電離放射線を照射すると、光学機能シートの凸部と接触した部分の電離放射線硬化型樹脂層は硬化し粘着性を消失するが、光学機能シートの凹部に対応する樹脂層は硬化せず、相変わらず粘着性を有する。光学機能シート凹部と樹脂層の間に形成されている空隙には、酸素を含む空気が介在しており、樹脂層の硬化反応が円滑に進行しないからであると考えられる。特に重合抑制剤を配合した樹脂層を使用することにより、この効果を有効に発揮させることができ好ましい。
なお図２には、光学機能シートとして凹凸面を有する面とは反対側にも凹凸面を有する、いわゆるレンズシートが示されているが、このようなレンズ形状でなくても平滑でもよい。必要なことは電離放射線を照射することにより、前記電離放射線硬化型樹脂層に所望の硬化部分と未硬化部分ができればよく、そのために電離放射線が透過する性能を有する材質や形状を有すればよい。したがってこのような選定基準に従い、レンズシートが必要なときはレンズ形状を有する光学機能シートが使用される。
FIG. 2 shows the manufacturing process of such an optical function sheet. First, an ionizing radiation curable resin tape having both surfaces sandwiched between release films is prepared. Hereinafter, this ionizing radiation curable resin layer is also simply referred to as a resin layer.
The release film on one side of the tape is peeled off, and the tape is bonded to the concavo-convex surface of the optical function sheet having the concavo-convex surface on one side. Then, the tape comes into contact with the convex portion, and a void is formed in the concave portion. When ionizing radiation is irradiated in this state, the ionizing radiation curable resin layer in contact with the convex portion of the optical function sheet is cured and the adhesiveness is lost, but the resin layer corresponding to the concave portion of the optical function sheet is not cured. As usual. It is considered that air containing oxygen is present in the gap formed between the optical functional sheet recess and the resin layer, and the curing reaction of the resin layer does not proceed smoothly. In particular, the use of a resin layer containing a polymerization inhibitor is preferable because this effect can be effectively exhibited.
FIG. 2 shows a so-called lens sheet having an uneven surface on the side opposite to the surface having an uneven surface as the optical function sheet. What is necessary is that the ionizing radiation curable resin layer should be formed with a desired cured portion and an uncured portion by irradiating with ionizing radiation. For that purpose, it should have a material or shape having the ability to transmit ionizing radiation. . Therefore, according to such selection criteria, when a lens sheet is necessary, an optical function sheet having a lens shape is used.
その後樹脂層のもう一方の離型フィルムを除去した後、別途用意した転写シートを積層する。転写シートには基材フィルム上に転写層が形成されており、転写層面が樹脂層に貼合されるように、積層される。そして転写シートを剥離することによって、光学機能シート凹部に対応した樹脂層に転写層が転写され、パターンが形成された光学機能シートが作製される。 Then, after removing the other release film of the resin layer, a separately prepared transfer sheet is laminated. In the transfer sheet, a transfer layer is formed on a substrate film, and the transfer layer is laminated so that the transfer layer surface is bonded to the resin layer. Then, by peeling the transfer sheet, the transfer layer is transferred to the resin layer corresponding to the concave portion of the optical function sheet, and an optical function sheet on which a pattern is formed is produced.
このように転写シートが貼合された状態で、窒素雰囲気下など酸素濃度の低い雰囲気中で光学機能シート側から電離放射線照射を加えることが好ましい。この際光学機能シートの凹部に対応した樹脂層は転写シートの転写層が接着された状態で硬化するため、より強固に転写層と接着する。その後転写シートを剥離することによって、粘着剤が未露光であった部分に転写層が転写され、光学材料のパターンが形成されたシートが作製される。また放射線照射前に、粘着剤層を十分に転写シートになじませることが望ましく、少なくとも１０分以上放置することが望ましい。 It is preferable to apply ionizing radiation from the optical functional sheet side in an atmosphere having a low oxygen concentration, such as a nitrogen atmosphere, with the transfer sheet bonded. At this time, since the resin layer corresponding to the concave portion of the optical function sheet is cured in a state where the transfer layer of the transfer sheet is adhered, the resin layer is more firmly bonded to the transfer layer. Thereafter, the transfer sheet is peeled off, whereby the transfer layer is transferred to a portion where the pressure-sensitive adhesive has not been exposed, and a sheet on which an optical material pattern is formed is produced. Further, it is desirable that the pressure-sensitive adhesive layer be sufficiently adapted to the transfer sheet before irradiation, and it is desirable to leave it for at least 10 minutes.
本発明に使用される樹脂層は、電離放射線照射によって硬化するものであれば特に制限されるものではないが、照射設備の簡便さや反応制御の容易性等を考慮に入れ、紫外線硬化型のものが好ましい。その厚さは１０μｍ以下が望ましい。
本発明においては、樹脂層には以下に述べるようにベース樹脂に硬化剤や各種添加剤等が配合された樹脂組成物とされたものが使用される。
樹脂層のベース樹脂としては一般的に、アクリル系粘着剤と電離放射線重合性化合物とを主成分とするものを使用できる。
アクリル系粘着剤は、（メタ）アクリル系重合体及び硬化剤を必須成分とするものを使用することができる。（メタ）アクリル系重合体は、例えば（メタ）アクリル酸エステルを重合体構成単位とする重合体、及び（メタ）アクリル酸エステル系重合体の（メタ）アクリル系重合体、或いは官能性単量体との共重合体、及びこれらの重合体の混合物等が挙げられる。これらの重合体の分子量としては重量平均分子量が５０万〜１００万程度の分子量のものが一般的に適用される。
The resin layer used in the present invention is not particularly limited as long as it is cured by irradiation with ionizing radiation. However, in consideration of the simplicity of irradiation equipment and the ease of reaction control, the resin layer is of an ultraviolet curing type. Is preferred. The thickness is desirably 10 μm or less.
In the present invention, as the resin layer, a resin composition obtained by blending a base resin with a curing agent, various additives, and the like as described below is used.
As the base resin for the resin layer, generally, a resin mainly composed of an acrylic pressure-sensitive adhesive and an ionizing radiation polymerizable compound can be used.
As the acrylic pressure-sensitive adhesive, those having a (meth) acrylic polymer and a curing agent as essential components can be used. The (meth) acrylic polymer is, for example, a polymer having (meth) acrylic acid ester as a polymer constituent unit, and a (meth) acrylic polymer of a (meth) acrylic acid ester polymer, or a functional single monomer. And a copolymer thereof, and a mixture of these polymers. As the molecular weight of these polymers, those having a weight average molecular weight of about 500,000 to 1,000,000 are generally applied.
また、硬化剤は、（メタ）アクリル系重合体が有する官能基と反応させて硬化させるために用いられる。例えば、１，３−ビス（Ｎ，Ｎ−ジグリシジルアミノメチル）シクロヘキサン、１，３−ビス（Ｎ，Ｎ−ジグリシジルアミノメチル）トルエン、１，３−ビス（Ｎ，Ｎ−ジグリシジルアミノメチル）ベンゼン、Ｎ，Ｎ，Ｎ，Ｎ′−テトラグリシジル−ｍ−キシレンジアミンなどの分子中に２個以上のエポキシ基を有するエポキシ化合物、２，４−トリレンジイソシアネート、２，６−トリレンジイソシアネート、１，３−キシリレンジイソシアネート、１，４−キシレンジイソシアネート、ジフェニルメタン−４，４′−ジイソシアネートなどの分子中に２個以上のイソシアネート基を有するイソシアネート系化合物、テトラメチロール−トリ−β−アジリジニルプロピオネート、トリメチロール−トリ−β−アジリジニルプロピオネート、トリメチロールプロパン−トリ−β−アジリジニルプロピオネート、トリメチロールプロパン−トリ−β−（２−メチルアジリジン）プロピオネートなどの分子中に２個以上のアジリジニル基を有するアジリジン系化合物等が挙げられる。硬化剤の添加量は、所望の粘着力に応じて調整すればよく、（メタ）アクリル系重合体１００質量部に対して０．１〜５．０質量部が適当である。 Moreover, a hardening | curing agent is used in order to make it react with the functional group which a (meth) acrylic-type polymer has, and to make it harden | cure. For example, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, 1,3-bis (N, N-diglycidylaminomethyl) toluene, 1,3-bis (N, N-diglycidylaminomethyl) ) Epoxy compounds having two or more epoxy groups in the molecule such as benzene, N, N, N, N'-tetraglycidyl-m-xylenediamine, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate , 1,3-xylylene diisocyanate, 1,4-xylene diisocyanate, diphenylmethane-4,4'-diisocyanate, etc., an isocyanate compound having two or more isocyanate groups in the molecule, tetramethylol-tri-β-aziridini Lupropionate, trimethylol-tri-β-aziridinylpropionate, Examples thereof include aziridine compounds having two or more aziridinyl groups in the molecule, such as dimethylolpropane-tri-β-aziridinylpropionate and trimethylolpropane-tri-β- (2-methylaziridine) propionate. . What is necessary is just to adjust the addition amount of a hardening | curing agent according to desired adhesive force, and 0.1-5.0 mass parts is suitable with respect to 100 mass parts of (meth) acrylic-type polymers.
電離放射線重合性化合物としては、例えば光照射によって三次元網状化しうる分子内に光重合性炭素−炭素二重結合を少なくとも２個以上有する低分量化合物が広く用いられ、具体的には、トリメチロールプロパントリアクリレート、テトラメチロールメタンテトラアクリレート、ペンタエリスリトールトリアクリレート、ペンタエリスリトールテトラアクリレート、ジペンタエリスリトールモノヒドロキシペンタアクリレート、ジペンタエリスリトールヘキサアクリレート、１，４−ブチレングリコールジアクリレート、１，６ヘキサンジオールジアクリレート、ポリエチレングリコールジアクリレートや、オリゴエステルアクリレート等が広く適用可能である。 As the ionizing radiation polymerizable compound, for example, a low-molecular weight compound having at least two photopolymerizable carbon-carbon double bonds in a molecule that can be three-dimensionally reticulated by light irradiation is widely used. Specifically, trimethylol is used. Propane triacrylate, tetramethylol methane tetraacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol monohydroxypentaacrylate, dipentaerythritol hexaacrylate, 1,4-butylene glycol diacrylate, 1,6 hexanediol diacrylate Polyethylene glycol diacrylate, oligoester acrylate, and the like are widely applicable.
また、上記の様なアクリレート系化合物のほかに、ウレタンアクリレート系オリゴマーを用いる事も出来る。ウレタンアクリレート系オリゴマーは、ポリエステル型またはポリエーテル型などのポリオール化合物と、多価イソシアナート化合物（例えば、２，４−トリレンジイソシアナート、２，６−トリレンジイソシアナート、１，３−キシリレンジイソシアナート、１，４−キシリレンジイソシアナート、ジフェニルメタン４，４−ジイソシアナートなど）を反応させて得られる末端イソシアナートウレタンプレポリマーに、ヒドロキシル基を有するアクリレートあるいはメタクリレート（例えば、２−ヒドロキシエチルアクリレート、２−ヒドロキシエチルメタクリレート、２−ヒドロキシプロピルアクリレート、２−ヒドロキシプロピルメタクリレート、ポリエチレングリコールアクリレート、ポリエチレングリコールメタクリレートなど）を反応させて得られる。 In addition to the above acrylate compounds, urethane acrylate oligomers can also be used. The urethane acrylate oligomer includes a polyol compound such as a polyester type or a polyether type, and a polyvalent isocyanate compound (for example, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylylene diene). A terminal isocyanate urethane prepolymer obtained by reacting isocyanate, 1,4-xylylene diisocyanate, diphenylmethane 4,4-diisocyanate, etc.) with an acrylate or methacrylate having a hydroxyl group (for example, 2-hydroxyethyl) Acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, polyethylene glycol acrylate, polyethylene glycol methacrylate, etc.) Obtained by the reaction.
電離放射線硬化型粘着剤中のアクリル系粘着剤と放射線重合性化合物との配合比としては、アクリル系粘着剤１００質量部に対して放射線重合性化合物を５０〜２００質量部、好ましくは５０〜１５０質量部の範囲で配合されるのが望ましい。この配合比の範囲である場合、放射線照射後に粘着剤層の粘着力は大きく低下する。
更には、電離放射線硬化型粘着剤は、上記の様にアクリル系粘着剤に放射線重合性化合物を配合する替わりに、アクリル系粘着剤自体を放射線重合性の官能基を有するアクリル酸エステル共重合体としてもよい。
As a compounding ratio of the acrylic pressure-sensitive adhesive and the radiation polymerizable compound in the ionizing radiation curable pressure-sensitive adhesive, the radiation polymerizable compound is 50 to 200 parts by weight, preferably 50 to 150 parts per 100 parts by weight of the acrylic pressure-sensitive adhesive. It is desirable to blend in the range of parts by mass. In the case of this blending ratio range, the adhesive strength of the pressure-sensitive adhesive layer is greatly reduced after radiation irradiation.
Further, the ionizing radiation curable pressure sensitive adhesive is an acrylic ester copolymer having a radiation polymerizable functional group instead of blending the radiation polymerizable compound with the acrylic pressure sensitive adhesive as described above. It is good.
また、電離放射線により粘着剤層の重合を開始させるために、光重合開始剤、例えばイソプロピルベンゾインエーテル、イソブチルベンゾインエーテル、ベンゾフェノン、ミヒラーズケトン、クロロチオキサントン、ベンジルメチルケタール、α−ヒドロキシシクロヘキシルフェニルケトン、２−ヒドロキシメチルフェニルプロパン等を添加する事が出来る。これらのうち少なくとも１種類を粘着剤層に添加する事により、効率よく重合反応を進行させる事ができる。 In order to initiate polymerization of the pressure-sensitive adhesive layer by ionizing radiation, a photopolymerization initiator such as isopropyl benzoin ether, isobutyl benzoin ether, benzophenone, Michler's ketone, chlorothioxanthone, benzyl methyl ketal, α-hydroxycyclohexyl phenyl ketone, 2- Hydroxymethylphenylpropane or the like can be added. By adding at least one of these to the pressure-sensitive adhesive layer, the polymerization reaction can proceed efficiently.
電離放射線硬化型樹脂層には、酸素の存在により粘着層の重合をより確実に抑えるために、重合禁止剤、例えば、メトキノンなどのハイドロキノン類、ベンゾキノン類、フェノチアジン類、フェノレンヂアミン類を添加することができる。これらのうち少なくとも１種類を粘着剤層に添加する事により、酸素と接する粘着層の硬化性や未硬化部の厚みを調整させる事ができる。光重合抑制（禁止）剤の添加量は、所望の粘着力に応じて適宜調整される。
また硬化した層への黒色剤や反射材の付着を低減させるため、フッ素など表面エネルギーを低下させる物質を含有させることができる。表面エネルギー低下のための材料含有量は、所望の粘着力に応じて適宜調整される。
In order to more reliably suppress the polymerization of the adhesive layer due to the presence of oxygen, a polymerization inhibitor such as hydroquinones such as methoquinone, benzoquinones, phenothiazines, and phenendiamines is added to the ionizing radiation curable resin layer. be able to. By adding at least one of these to the pressure-sensitive adhesive layer, the curability of the pressure-sensitive adhesive layer in contact with oxygen and the thickness of the uncured part can be adjusted. The amount of the photopolymerization inhibitor (prohibited) added is appropriately adjusted according to the desired adhesive strength.
Moreover, in order to reduce adhesion of the black agent and the reflective material to the cured layer, a substance that lowers the surface energy such as fluorine can be contained. The material content for lowering the surface energy is appropriately adjusted according to the desired adhesive strength.
粘着剤には適宜、粘着力を調整するためのタッキファイヤーなども添加される。
また、本発明に使用される転写シートは、基材フィルムと転写層から構成されるシートである。基材フィルムとしては例えば、ポリエチレン、ポリプロピレン、エチレン−プロピレン共重合体、ポリブテン、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸エステル共重合体などが使用される。これらの基材フィルムの表面に剥離しやすいよう、例えばシリコン処理、テフロン処理等の離型処理を施してもよい。
A tackifier or the like for adjusting the adhesive strength is appropriately added to the adhesive.
The transfer sheet used in the present invention is a sheet composed of a base film and a transfer layer. Examples of the base film that can be used include polyethylene, polypropylene, ethylene-propylene copolymer, polybutene, ethylene-vinyl acetate copolymer, and ethylene-acrylic acid ester copolymer. For example, a release treatment such as a silicon treatment or a Teflon treatment may be performed so that the surface of the base film is easily peeled off.
転写層は用途に応じて適宜選択される無機成分の粉末と、有機溶剤、有機材料からなる結合剤などと混合したペースト状のものを塗工し乾燥して作製される。もしくは、蒸着などの方法により直接、基材フィルム上に積層して作製してもよい。
無機成分としては例えば、Ｃｒ、Ｔｉ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ａｇ、Ａｕ、Ｇｅ、Ａｌ、Ｍｇ、Ｓｂ、Ｐｂ、Ｐｄ、Ｃｄ、Ｂｉ、Ｓｎ、Ｓｅ、Ｉｎ、Ｇｅ、Ｒｂ等の金属およびその酸化物、窒化物の１種もしくは２種以上を組み合わせて使用してもよい。また炭素粉末を使用してもよい。
また、転写層に用いられる有機成分に放射線重合性の化合物を添加してもよい。電離放射線樹脂層が硬化する際に同時に硬化して接合し、樹脂層への転写が容易となる。
The transfer layer is prepared by applying and drying a paste in which an inorganic component powder appropriately selected according to the application, an organic solvent, a binder made of an organic material, and the like are mixed. Or you may laminate | stack on a base film directly by methods, such as vapor deposition, and may produce it.
Examples of inorganic components include metals such as Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, Ge, Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, Se, In, Ge, and Rb. And one or more of oxides and nitrides thereof may be used in combination. Carbon powder may also be used.
Moreover, you may add a radiation polymerizable compound to the organic component used for a transfer layer. When the ionizing radiation resin layer is cured, it is simultaneously cured and joined, and transfer to the resin layer becomes easy.
上記の実施の形態は両面が離型フィルムで挟まれた電離放射線硬化型樹脂層を使用した場合であるが、樹脂層の片面には基材フィルムを、その他の片面には離型フィルムを積層したテープを使用することもできる。この場合には、所望の転写層が形成されたテープを得ることができる。その場合に使用されるシートを前記の実施形態の光学機能シートと区別するために、集光シートともいう。
その工程を図３に示す。
The above embodiment is a case where an ionizing radiation curable resin layer having both surfaces sandwiched between release films is used. A base film is laminated on one side of the resin layer, and a release film is laminated on the other side. You can also use the tapes you have made. In this case, a tape on which a desired transfer layer is formed can be obtained. In order to distinguish the sheet used in that case from the optical function sheet of the above-described embodiment, it is also referred to as a light collecting sheet.
The process is shown in FIG.
まず樹脂層の片面には基材フィルムを、その他の面には離型フィルムを積層した粘着テープを用意する。このテープの片面の離型フィルムを剥離し、片面に凹凸面を有する集光シートの当該凹凸面に樹脂層が来るように、当該粘着テープを貼合する。そうすると凸部にテープは接触し、凹部には空隙ができる。この状態で電離放射線を照射すると、集光シートの凸部と接触した部分の電離放射線硬化型樹脂層は硬化し粘着性を消失するが、集光シートの凹部に対応する樹脂層は重合禁止剤添加の効果で相変わらず粘着性を有し、その粘着性の少しの低下も抑制される。 First, an adhesive tape is prepared by laminating a base film on one side of the resin layer and a release film on the other side. The release film on one side of the tape is peeled off, and the pressure-sensitive adhesive tape is bonded so that the resin layer comes to the concave / convex surface of the condensing sheet having the concave / convex surface on one side. Then, the tape comes into contact with the convex portion, and a void is formed in the concave portion. When ionizing radiation is irradiated in this state, the ionizing radiation curable resin layer in contact with the convex portion of the condensing sheet is cured and loses its adhesiveness, but the resin layer corresponding to the concave portion of the condensing sheet is a polymerization inhibitor. Due to the effect of addition, it still has adhesiveness, and a slight decrease in the adhesiveness is also suppressed.
その後粘着テープから集光シートを除去した後、粘着テープに転写シートを積層する。転写シートには基材フィルム上に転写層が形成されており、転写層面が電離放射線硬化型樹脂層に貼合するように、積層される。そして転写シートを剥離することによって、集光シート凹部に対応した樹脂層に転写層が転写され、パターンが形成されたテープが作製される。このとき表面エネルギーを低下させる物質含有の効果によって、既に硬化して粘着力を失った部分への転写層の付着が抑制される。
転写層には、着色剤を配合して着色層とするのはもちろんのこと、導電剤を配合することにより、電磁波遮蔽層とすることができその場合には、電磁波遮蔽シートを簡便に得ることができる。その他要求特性に応じて、反射剤、光遮蔽剤や基材フィルムとは屈折率の異なる材料を配合でき、所望の特性を有するテープを得ることができる。
Then, after removing the light collecting sheet from the adhesive tape, the transfer sheet is laminated on the adhesive tape. In the transfer sheet, a transfer layer is formed on the base film, and the transfer layer is laminated so that the transfer layer surface is bonded to the ionizing radiation curable resin layer. Then, by peeling the transfer sheet, the transfer layer is transferred to the resin layer corresponding to the condensing sheet recess, and a tape on which a pattern is formed is produced. At this time, due to the effect of containing a substance that reduces the surface energy, adhesion of the transfer layer to a portion that has already been cured and has lost its adhesive force is suppressed.
In addition to blending a colorant into the transfer layer to form a colored layer, it is possible to obtain an electromagnetic wave shielding layer by blending a conductive agent, in which case an electromagnetic wave shielding sheet can be easily obtained. Can do. According to other required characteristics, a material having a refractive index different from that of the reflective agent, the light shielding agent and the base film can be blended, and a tape having desired characteristics can be obtained.
このように転写シートが貼合された状態で、テープ基材側から、空気中、或は窒素雰囲気中で電離放射線照射を加えることが好ましい。この際集光シートの凹部に対応した電離放射線硬化型樹脂層は転写シートの転写層が接着された状態で硬化するため、より強固に転写層と接着する。その後転写シートを剥離することによって、粘着剤が未露光であった部分に転写層が転写され、光学材料のパターンが形成されたシートが作製される。また放射線照射前に、粘着剤層を十分に転写シートになじませることが望ましく、少なくとも１０分以上放置することが望ましい。 It is preferable to apply ionizing radiation from the tape base material side in the air or in a nitrogen atmosphere with the transfer sheet bonded. At this time, the ionizing radiation curable resin layer corresponding to the concave portion of the condensing sheet is cured in a state where the transfer layer of the transfer sheet is adhered, so that the ionizing radiation curable resin layer is more firmly bonded to the transfer layer. Thereafter, the transfer sheet is peeled off, whereby the transfer layer is transferred to a portion where the pressure-sensitive adhesive has not been exposed, and a sheet on which an optical material pattern is formed is produced. Further, it is desirable that the pressure-sensitive adhesive layer be sufficiently adapted to the transfer sheet before irradiation, and it is desirable to leave it for at least 10 minutes.
本発明に使用される粘着テープは少なくとも基材フィルムと粘着剤層から構成される粘着テープであって、粘着剤層が放射線照射によって硬化するものであれば特に制限されるものではない。一般には基材フィルムに接着性が向上するようコロナ処理等の表面処理を施し、粘着剤を塗工して作製される。 The pressure-sensitive adhesive tape used in the present invention is a pressure-sensitive adhesive tape composed of at least a base film and a pressure-sensitive adhesive layer, and is not particularly limited as long as the pressure-sensitive adhesive layer is cured by radiation irradiation. In general, the substrate film is prepared by applying a surface treatment such as a corona treatment so as to improve the adhesion, and applying a pressure-sensitive adhesive.
基材フィルムとしては，例えば、ポリエチレン、ポリプロピレン、エチレン−プロピレン共重合体、ポリブテン、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸エステル共重合体、アイオノマーなどのα−オレフィンの単独重合体または共重合体、ポリエチレンテレフタレート、ポリカーボネート、ポリメタクリル酸メチル等のエンジニアリングプラスチック、またはポリウレタン、スチレン−エチレン−ブテンもしくはペンテン系共重合体等の熱可塑性エラストマーが挙げられる。またはこれらの群から選ばれる２種以上が混合されたものもしくは複層化されたものでもよい。基材フィルムの厚みは通常５０〜２００μｍであるが、必要に応じて厚さを変えることができる。 Examples of the base film include homopolymers or copolymers of α-olefins such as polyethylene, polypropylene, ethylene-propylene copolymer, polybutene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid ester copolymer, and ionomer. Examples include polymers, engineering plastics such as polyethylene terephthalate, polycarbonate, and polymethyl methacrylate, and thermoplastic elastomers such as polyurethane, styrene-ethylene-butene, and pentene copolymers. Alternatively, a mixture of two or more selected from these groups or a multilayered structure may be used. Although the thickness of a base film is 50-200 micrometers normally, thickness can be changed as needed.
１ プロジェクター
２ フレネルシート
３ レンズシート
４ 着色層からなる遮光層
１０ 粘着層の両面が離型フィルムで挟まれた電離放射線硬化型樹脂テープ
１１ 離型フィルム
１２ 電離放射線硬化型樹脂層
１２１ 電離放射線硬化型樹脂層の未硬化部分
１２２ 電離放射線硬化型樹脂層の硬化部分
２０ 片面に凹凸面を有する光学機能シート
２３ 光学機能シートに設けられた凹凸面
２４ 空隙
３０ 転写シート
３１ 転写シートの転写層
３２ 転写シートの基材フィルム
３１１ パターン
４０ 基材フィルム上に電離放射線硬化型樹脂、離型フィルムが順に形成されたテープ
４１ 基材フィルム
４２ 電離放射線硬化型樹脂
４２２ 電離放射線硬化型樹脂層の未硬化部分
４２３ 電離放射線硬化型樹脂層の硬化部分
４３ 離型フィルム
５０ 片面に凹凸面を有する集光シート
５２ 空隙
５３ 集光シートに設けられた凹凸面
DESCRIPTION OF
Claims (8)
前記電離放射線硬化型樹脂層は、前記電離放射線硬化型樹脂層の表面エネルギーを低下させる材料および／または重合禁止剤を含有し、
前記凹凸面の凹面と前記電離放射線硬化型樹脂層の間には空隙が形成されており、
前記凸面と接していない前記電離放射線硬化型樹脂層は未硬化層であり、当該未硬化層上に着色層が形成され、
前記凸面と接触した部分の前記電離放射線硬化型樹脂層は、電離放射線照射により硬化していることを特徴とする光学機能シート。 It is an optical functional sheet having an uneven surface on one side, and an ionizing radiation curable resin layer is formed so as to be in contact with the convex surface of the uneven surface,
The ionizing radiation curable resin layer contains a material and / or a polymerization inhibitor that reduces the surface energy of the ionizing radiation curable resin layer,
A gap is formed between the concave surface of the uneven surface and the ionizing radiation curable resin layer,
The ionizing radiation-curable resin layer which is not in contact with the convex surface is an uncured layer, a colored layer is formed on the uncured layer,
The optical functional sheet, wherein the ionizing radiation curable resin layer in a portion in contact with the convex surface is cured by ionizing radiation irradiation .
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| JP2006173470A JP5220287B2 (en) | 2006-06-23 | 2006-06-23 | Optical function sheet and manufacturing method thereof |
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| JP2006173470A JP5220287B2 (en) | 2006-06-23 | 2006-06-23 | Optical function sheet and manufacturing method thereof |
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| Publication Number | Publication Date |
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| JP2008003349A JP2008003349A (en) | 2008-01-10 |
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| JPH04156441A (en) * | 1990-10-19 | 1992-05-28 | Toppan Printing Co Ltd | Formation of shielding part of projection screen |
| JPH0618990A (en) * | 1991-07-26 | 1994-01-28 | Toppan Printing Co Ltd | Formation of light shielding part of transmission type screen |
| JPH11125866A (en) * | 1997-10-24 | 1999-05-11 | Toppan Printing Co Ltd | Lenticular sheet for transmission type screen |
| JP2002303709A (en) * | 2001-04-09 | 2002-10-18 | Toppan Printing Co Ltd | Light diffusing substrate and transmission type screen |
| JP4056800B2 (en) * | 2001-06-13 | 2008-03-05 | 株式会社クラレ | Lens sheet and manufacturing method thereof |
| JP2003155460A (en) * | 2001-11-21 | 2003-05-30 | Bando Chem Ind Ltd | Pressure-sensitive adhesive sheet |
| JP2004045586A (en) * | 2002-07-10 | 2004-02-12 | Toppan Printing Co Ltd | Microlens array sheet having light shielding layer |
| JP4250928B2 (en) * | 2002-08-26 | 2009-04-08 | 凸版印刷株式会社 | Lens sheet and transmissive screen |
| JP2004258457A (en) * | 2003-02-27 | 2004-09-16 | Toppan Printing Co Ltd | Lens sheet and light diffusive substrate or transmission type screen |
| JP2004302005A (en) * | 2003-03-31 | 2004-10-28 | Kuraray Co Ltd | Transmission screen |
| JP2005099371A (en) * | 2003-09-24 | 2005-04-14 | Dainippon Printing Co Ltd | Lenticular lens sheet and its manufacturing method |
| JP2005221536A (en) * | 2004-02-03 | 2005-08-18 | Kuraray Co Ltd | Method for manufacturing lens sheet and its lens sheet |
| JP2006047784A (en) * | 2004-08-05 | 2006-02-16 | Dainippon Printing Co Ltd | Lens sheet with light shielding band and manufacturing method thereof |
| JP2006208787A (en) * | 2005-01-28 | 2006-08-10 | Sony Corp | Lenticular sheet for transmission type screen, and manufacturing method thereof |
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