Title:
POLYESTER FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2021/033494
Kind Code:
A1
Abstract:
This polyester film roll is formed by winding a polyester film, wherein the polyester film satisfies the following (1) and (2). (1) When the polyester film is heat-treated at 100°C for 5 minutes, at the edge of the film, the absolute value of the difference between heat shrinkage in the diagonally left 45° direction and heat shrinkage in the diagonally right 45° direction with respect to 0° in the longitudinal direction (MD direction) of the film is at most 0.15%. (2) The average surface roughness (Sa) of at least one surface of the polyester film is at most 8 nm.
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Inventors:
HATTORI YUTA (JP)
Application Number:
PCT/JP2020/028747
Publication Date:
February 25, 2021
Filing Date:
July 27, 2020
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C08J5/18; B28B1/30; B32B27/36; B29C55/12; B32B27/00
Foreign References:
| JP2018021168A | 2018-02-08 | |||
| JP2019111747A | 2019-07-11 | |||
| JP2017200761A | 2017-11-09 | |||
| JP2018203818A | 2018-12-27 | |||
| JP2019116086A | 2019-07-18 | |||
| JP2019072979A | 2019-05-16 |
Attorney, Agent or Firm:
TAGUCHI, Masahiro et al. (JP)
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