|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/2102 ; 264/2105 ; 264/280 ; 425/325|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 15 인용 특허 : 0|
A process for the production of optically isotropic extrusion films is disclosed. Accordingly in a first process step a thermoplsatic resin is extruded to form a film having a thickness below 600 m
A process for the production of optically isotropic extruded films having gloss on both sides and a thickness below 600 m150 to 400°C. and at a pressure of from 50 to 200 bar, said thermoplastic polymer being at least one member selected from the group consisting of a polycarbonate based on bis(-hydroxphenyl)-alkane and a polycarbonate based on a bis(-hydroxyphenyl)-cycloalkane.