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1. (WO2017150495) STRETCHED FILM, METHOD FOR MANUFACTURING SAME, CIRCULAR POLARIZATION PLATE, AND DISPLAY DEVICE

Pub. No.:    WO/2017/150495    International Application No.:    PCT/JP2017/007662
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: G02B 5/30
B29C 55/04
C08J 5/18
G02F 1/1335
G02F 1/13363
H01L 51/50
H05B 33/02
H05B 33/10
B29L 7/00
B29L 9/00
Applicants: ZEON CORPORATION
日本ゼオン株式会社
Inventors: ASADA, Takeshi
浅田 毅
Title: STRETCHED FILM, METHOD FOR MANUFACTURING SAME, CIRCULAR POLARIZATION PLATE, AND DISPLAY DEVICE
Abstract:
Provided is a method for manufacturing a stretched film, the method including: a step for stretching an elongated multilayer film (D) at a draw ratio of less than 1.5 times in a direction at 45° ± 15° in relation to the width direction of the multilayer film (D), the multilayer film (D) being provided with a pre-stretching film (A) comprising a thermoplastic resin, a shrinkable film (B) for which the shrink rate in the film length direction in air at 140°C for 60 seconds is 10-40% and the shrink rate in the film width direction is 5% or less, and an adhesive layer (C) for affixing the pre-stretching film (A) and the shrinkable film (B); and a step for separating the shrinkable film (B) and the adhesive layer (C).