摘要:
Disclosed is an optical film comprising a resin material containing a copolymer of 20 to 90% by weight of methyl methacrylate, 10 to 70% by weight of tert-butylcyclohexyl methacrylate represented by formula (I):
and 0 to 20% by weight of a monomer other than methyl methacrylate and tert-butylcyclohexyl methacrylate, the optical film having been produced by drawing an undrawn film formed by melt-extruding the resin material by a factor of 1.4 to 6.0 in terms of area ratio.
摘要:
Disclosed is an optical film produced by a method comprising continuously discharging a molten resin on a casting roll through a die lip of an extruder, wherein the molten resin contains a copolymer of (A) 75 to 99% by weight of an (meth)acrylate monomer that, when homopolymerized, has a negative intrinsic birefringence, and (B) 1 to 25% by weight of an (meth)acrylate monomer that, when homopolymerized, has a positive intrinsic birefringence, and a velocity ratio V 2 /V 1 of 1.2 to 15 is satisfied wherein V 1 represents a discharge velocity of the molten resin from the die lip, m/min; and V 2 represents a surface velocity of the casting roll, m/min.
摘要翻译:公开了一种通过挤出机的模唇连续排出流延辊上的熔融树脂的方法制造的光学膜,其中熔融树脂含有(A)75-99重量%的(甲基)丙烯酸酯 当均聚时具有负固有双折射的单体,和(B)1至25重量%的(甲基)丙烯酸酯单体,当均聚时具有正的固有双折射,并且速度比V 2 / V 1为 1.2〜15,其中V 1表示熔融树脂从模唇的排出速度,m / min; V 2表示铸辊的表面速度,m / min。