Patent ID: 6552145
Filing Date: 2003-04-22
Classification: C09K,G02B,G02F,Y10T

Abstract:
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 135Â° C. to 180Â° C., and (2) an inherent viscosity (&eegr;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 30Â° 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 30Â° C. with an Ubbelohde viscometer for chloroform, the solvent, wherein (3) the above-mentioned Tg and &eegr;inh are within the range indicated by the following equation (2):&eegr;inh={ln(T/B)}/Câ€ƒâ€ƒ(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 45&eegr;inh&lE;58.5âˆ’0.2Tgâ€ƒâ€ƒ(2).