Polarizer protection film
First Claim
Patent Images
1. A polarizer protection film obtained by melt film formation of a norbornene resin having (1) a glass transition temperature Tg (measured in accordance with JIS K 7121) of 135°
- C. to 180°
C., and (2) an inherent viscosity (η
inh) of 0.4 or more, which is calculated by the following equation (1) from the drop time T (sec.) between marked lines measured at 30°
C. with an Ubbelohde viscometer for a solution of the resin in chloroform having a resin concentration of C (g/dl) and the drop time B (sec.) between marked lines measured at 30°
C. with an Ubbelohde viscometer for chloroform, the solvent, wherein (3) the above-mentioned Tg and η
inh are within the range indicated by the following equation (2);
η
inh={ln(T/B)}/C
(1) T;
the drop time (sec.) between marked lines of a sample solution B;
the drop time (sec.) between marked lines of a solvent alone C;
the concentration (g/dl) of the sample solution 45η
inh≦
58.5−
0.2Tg
(2)
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Accused Products
Abstract
A polarizer protection film for protecting a polarizer used in a liquid crystal display is obtained by using a film obtained by melt film formation of a norbornene resin having a glass transition temperature Tg of 135° C. to 180° C., and an inherent viscosity (ηinh) of 0.4 or more, measured at 30° C., in chloroform, wherein the Tg and ηinh are within the range indicated by the following equation (2):
45ηinh≦58.5−0.2T (2)
10 Citations
6 Claims
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1. A polarizer protection film obtained by melt film formation of a norbornene resin having (1) a glass transition temperature Tg (measured in accordance with JIS K 7121) of 135°
- C. to 180°
C., and (2) an inherent viscosity (η
inh) of 0.4 or more, which is calculated by the following equation (1) from the drop time T (sec.) between marked lines measured at 30°
C. with an Ubbelohde viscometer for a solution of the resin in chloroform having a resin concentration of C (g/dl) and the drop time B (sec.) between marked lines measured at 30°
C. with an Ubbelohde viscometer for chloroform, the solvent, wherein (3) the above-mentioned Tg and η
inh are within the range indicated by the following equation (2);
η
inh={ln(T/B)}/C
(1)T;
the drop time (sec.) between marked lines of a sample solutionB;
the drop time (sec.) between marked lines of a solvent aloneC;
the concentration (g/dl) of the sample solution45η
inh≦
58.5−
0.2Tg
(2)- View Dependent Claims (2, 3, 4, 5, 6)
- C. to 180°
-
3. The polarizer protection film according to claim 2, wherein monomer A is 8-methyl-8-methoxycarbonyltetracyclo-[4.4.0.12,5.12,5.17,10]-3-dodecene.
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4. The polarizer protection film according to claim 2, wherein monomer B is bicyclo[2.2.1]hept-2-ene.
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5. A polarizing film for a liquid crystal display in which a polarizer is laminated with the polarizer protection film according to any one of claims 1 to 4 on at least one surfaces of the polarizer.
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6. A liquid crystal display in which the polarizing film for a liquid crystal display according to claim 5 is laminated, with the interposition of a pressure-sensitive adhesive.
Specification