| 发明名称 |
METHOD FOR PRODUCING RETARDATION FILM |
| 摘要 |
A method for producing a retardation film comprising the steps of: co-extruding or simultaneously casting a thermoplastic resin A and a thermoplastic resin B to obtain a laminated film comprising a layer of the thermoplastic resin A and a layer of the thermoplastic resin B; and uniaxially stretching the laminated film at least twice to cross a molecular orientation axis in the layer of the thermoplastic resin A and a molecular orientation axis in the layer of the thermoplastic resin B each other at almost right angles. |
| 申请公布号 |
US2015234107(A1) |
申请公布日期 |
2015.08.20 |
| 申请号 |
US201514702312 |
申请日期 |
2015.05.01 |
| 申请人 |
ZEON CORPORATION |
发明人 |
HATANO Taku;ARAKAWA Kohei;YAMANAKA Shunsuke |
| 分类号 |
G02B5/30;B29C47/00;B29C55/04;B29C47/06 |
主分类号 |
G02B5/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for producing a retardation film comprising steps of:
co-extruding or simultaneously casting a thermoplastic resin A and a thermoplastic resin B to obtain a laminated film comprising a layer of the thermoplastic resin A and a layer of the thermoplastic resin B, and uniaxially stretching the laminated film at least twice to cross a molecular orientation axis in the layer of the thermoplastic resin A and a molecular orientation axis in the layer of the thermoplastic resin B each other at an angle of 70 degrees to 110 degrees, in which the thermoplastic resin A has a positive or negative intrinsic birefringence and the thermoplastic resin B has an intrinsic birefringence of the same sign as a sign of the thermoplastic resin A. |
| 地址 |
Tokyo JP |
