Verfahren zur Herstellung eines biaxial gestreckten thermoplastischen Harzfilm

Details

Veröffentlichungs-Nr.

EP2570252

Aktenzeichen

EP12181184

Anmeldetag

21. August 2012

Veröffentlichung

30. Juli 2014

Erteilung

30. Juli 2014

Rechtsraum

EP

IPC

B29C55/14H01L31/048

Abstract

Provided is a method of manufacturing a biaxially stretched thermoplastic resin film that is excellent in dimensional stability and hydrolysis resistance. The method includes a process of forming a thermoplastic resin sheet, a process of longitudinally stretching the resin sheet in a longitudinal direction, and a process of transversely stretching the resin sheet in a transverse direction after the longitudinal stretching. The transverse stretching process includes a process of preheating the resin sheet after the longitudinal stretching, a process of transversely stretching the resin sheet in the transverse direction after the preheating, a process of thermally fixing the film that is obtained through the stretching, a process of relaxing the tension applied to the film, and a process of cooling the film.

Anmelder

Firma

FUJIFILM Corporation

Land

🇯🇵 Japan

Fachgebiete