Title:
UNSTRETCHED POLYESTER FILM AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/225013
Kind Code:
A1
Abstract:
The present invention pertains to an unstretched polyester film having a PBT layer comprising at least polybutylene terephthalate, and makes it possible to provide: an unstretched PBT film having excellent stretching characteristics and making it possible to obtain a biaxially stretched PBT film that has, in a state immediately after film-forming, an X-ray diffraction peak derived from crystallization of the PBT layer in 2θ = 15° to 25° in an X-ray diffraction method, and thereby has a good stretching balance; and a method for manufacturing the same.
Inventors:
HATA MOTOHIDE (JP)
YAMADA TOSHIKI (JP)
MATSUSAKI REN (JP)
HIROTA NORIHISA (JP)
YAMADA TOSHIKI (JP)
MATSUSAKI REN (JP)
HIROTA NORIHISA (JP)
Application Number:
PCT/JP2022/018428
Publication Date:
October 27, 2022
Filing Date:
April 21, 2022
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B29C48/08; B29C48/21; B29C48/305; B29C48/88; B29C55/02; B29C55/12; B29C55/14; B32B27/36; C08J5/18; B29K67/00; B29L9/00
Domestic Patent References:
| WO2004048071A1 | 2004-06-10 | |||
| WO2019021759A1 | 2019-01-31 |
Foreign References:
| JPH03164619A | 1991-07-16 |
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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