[특허]Polyester film composite, light-diffuser plate and utilization thereof

Teijin Limited

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Polyester film composite, light-diffuser plate and utilization thereof

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-027/08 B32B-027/36
미국특허분류(USC)	428/001.54; 428/001.3; 428/001.33; 428/331; 428/343; 428/480; 428/910; 359/601; 524/493
출원번호	US-0958276 (2001-02-09)
우선권정보	JP-0033189 (2000-02-10); JP-0058589 (2000-03-03); JP-0211155 (2000-07-12)
국제출원번호	PCT/JP01/00951 (2001-02-09)
국제공개번호	WO01/58991 (2001-08-16)
발명자 / 주소	Mizutani, Kei Saigo, Takashi Fukuda, Masayuki
출원인 / 주소	Teijin Limited
대리인 / 주소	Sughrue Mion, PLLC
인용정보	피인용 횟수 : 9 인용 특허 : 3

초록
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A polyester film composite material comprising a biaxially oriented polyester film having a thickness of 5 at least 50 gm but not more than 200 gm and an easy-adhesion coating applied onto one or each surface thereof, and having a haze value of less than 2% and a total light transmissivity of at least 90%, and a light-diffusing plate comprising a light-diffusing layer 10 laminated on the surface of the easy-adhesion coating thereof. According to the present invention, a light-diffusing plate having excellent optical properties when used in a liquid cryst...

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1. A polyester film composite material comprising a biaxially oriented polyester film having a thickness of at least 50 μm but not more than 200 μm and an easy-adhesion coating applied onto one or each surface thereof, and having a haze value of less than 2% and a total light transmissivity of at least 90%,wherein the biaxially oriented polyester film is a single-layered polyester film or a laminated polyester film,and a polyester constituting a single layer or at least an outer film of a laminated film in said biaxially oriented polyester film contains at least 0.001% by weight but not more than 0.1% by weight of porous silica particles and/or plate-like aluminum silicate particles having an average particle diameter of at least 0.1 μm but not greater than 3 μm,and said easy-adhesion coating has a composition composed, substantially of (A) a water-base polyester resin having a glass transition point of 40 to 80° C., (B) an acrylic resin having a glass transition point of 25 to 75° C. and (C) acrylic crosslinked polymer particles. 2. The polyester film composite material of claim 1, wherein a polyester constituting said biaxially oriented polyester film is polyethylene terephthalate. 3. The polyester film composite material of claim 1, wherein a polyester constituting said biaxially oriented polyester film is polyethylene-2,6-naphthalate. 4. The polyester film composite material of claim 1, wherein the easy-adhesion coating is formed on each surface of said biaxially oriented polyester film. 5. The polyester film composite material of claim 1, which has a haze value of less than 1.5%. 6. The polyester film composite material of claim 1, which has a total light transmissivity of at least 93%. 7. The polyester film composite material of claim 1, wherein the biaxially oriented polyester film is a single-layered polyester film or a laminated polyester film formed of two layers or three layers. 8. The polyester film composite material of claim 1, wherein said biaxially oriented polyester film is a laminated polyester film of two or three layers, and a polyester layer (Y) containing at least 0.001% by weight but not more than 0.1% by weight of porous silica particles and/or plate-like aluminum silicate particles having an average particle diameter of at least 0.1 μm but not greater than 3 μm is laminated on one surface or each surface of a polyester film layer (X) containing 0.005% by weight or less of inert fine particles. 9. The polyester film composite material of claim 8, wherein a polyester constituting the polyester film layer (X) has an intrinsic viscosity (η x ) of 0.40 to 0.6. a polyester constituting the polyester film layer (Y) has an intrinsic viscosity (η y ) of 0.50 to 0.65 and (η y ) is equivalent to, or greater than, (η x ). 10. The polyester film composite material of claim 1, wherein said easy-adhesion coating has a thickness of 0.06 to 0.16 μm. 11. The polyester film composite material of claim 1, wherein said easy-adhesion coating further comprises (D) an aliphatic amide and/or an aliphatic bisamide. 12. The polyester film composite material of claim 1 or 11, wherein said (C) acrylic crosslinked polymer particles have an average particle diameter of at least 0.01 μm but not greater than 0.30 μm. 13. The polyester film composite material of claim 1 or 11, wherein said (A) water-base polyester resin contains 8 to 20 mol %, based on the content of total dicarboxylic acid components, of a dicarboxylic acid component having a molecule containing a group of —SO 3 M in which M is a metal atom, an ammonium group or a quatemary phosphonium group. 14. The polyester film composite material of claim 1, which gives a brilliance of at least 200 cd/m 2 when a light-diffusing layer is laminated on a surface of the easy-adhesion coating. 15. The polyester film composite material of claim 1, wherein the amount of an antimony compo und contained in a polyester constituting the biaxially oriented polyester film is 15 mmol % or less as metal antimony per mole of total acid components of the polyester. 16. A polyester film composite material comprising(I) a biaxially oriented polyester film formed of polyethylene terephthalate containing at least 0.001% by weight but not more than 0.1% by weight of porous silica particles and/or plate-like aluminum silicate particles having an average particle diameter of at least 0.1 μm but not greater than 3 μm, and(II) a coating composition substantially containing (A′) a water-base polyester containing 8 to 20 mol %, based on the content of total dicarboxylic acid components, of a dicarboxylic acid component having a group of —SO 3 M (in which M is a metal atom, ammonium salt or quaternary phosphonium salt) in its molecule and having a glass transition point of 40 to 80° C., (B) an acrylic resin having a glass transition point of 25 to 75° C. and (C) acrylic crosslinked polymer particles.(III) the biaxially oriented polyester film having a structure in which a coating of said coating composition is formed on both the surfaces of said biaxially oriented polyester and having a haze value of less than 2% and a total light transmissivity of at least 90%. 17. A polyester film composite material comprising(I) a biaxially oriented polyester film formed of polyethylene terephthalate containing at least 0.001% by weight but not more than 0.1% by weight of porous silica particles and/or plate-like aluminum silicate particles having an average particle diameter of at least 0.1 pm but not greater than 3 μm, and(II) a coating composition substantially containing (A′) a water-base polyester containing 8 to 20 mol %, based on the content of total dicarboxylic acid components, of a dicarboxylic acid component having a group of —SO 3 M (in which M is a metal atom, ammonium salt or quaternary phosphonium salt) in its molecule and having a glass transition point of 40 to 80° C., (B) an acrylic resin having a glass transition point of 25 to 75° C., (C) acrylic crosslinked polymer particles and (D) an aliphatic amide and/or aliphatic bisamide,(III) the biaxially oriented polyester film having a structure in which a coating of said coating composition is formed on both the surfaces of said biaxially oriented polyester and having a haze value of less than 2% and a total light transmissivity of at least 90%. 18. A polyester film composite material comprising(I) a polyester film that is a laminated biaxially oriented polyester film formed of laminated two or three laminated layers formed of polyethylene terephthalate, said film being a film wherein a polyester layer (Y) containing at least 0.001% by weight but not more than 0.1% by weight of porous silica particles and/or plate-like aluminum silicate particles having an average particle diameter of at least 0.1 μm but not greater than 3 μm is laminated on each surface or one surface of a polyester film layer (X) having an inert-fine-particles content of 0.005% by weight or less, and(II) a coating composition substantially containing (A′) a water-base polyester containing 8 to 20 mol %, based on the content of total dicarboxylic acid components, of a dicarboxylic acid component having a group of —SO 3 M (in which M is a metal atom, ammoniuni salt or quatemary phosphonium salt) in its molecule and having a glass transition point of 40 to 80° C., (B) an acrylic resin having a glass transition point of 25 to 75° C., and (C) acrylic crosslinked polymer particles,(III) the biaxially oriented polyester film having a structure in which a coating of said coating composition is formed on both the surfaces of said biaxially oriented polyester and having a haze value of less than 2% and a total light transmissivity of at least 90%. 19. The polyester film composite material of claim 18, wherein the coati ng composition further contains (D) an aliphatic amide and/or aliphatic bisamide. 20. A light-diffusing plate comprising the polyester film composite material recited in claim 1 and a light-diffusing layer laminated on the surface of the easy-adhesion coating thereof. 21. A liquid crystal display comprising the light-diffusing plate recited in claim 20 arranged therein. 22. A composite glass comprising the polyester film composite material recited in claim 1 laminated on a glass plate.

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Polyester film composite, light-diffuser plate and utilization thereof

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Polyester film composite, light-diffuser plate and utilization thereof

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