Title:
POLYESTER FILM AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/058057
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a polyester film and a hard coat film which are for a surface protection film of a foldable display that has excellent mass productivity and suppresses the occurrence of distortion of an image displayed on a folding part after repetitive bending, which are excellent in heat resistance, and in which a crease mark is unlikely to develop. The present invention relates to a polyester film that has, in at least one of the longitudinal direction and the width direction, a tan δ of 0.020 or less at 65°C as obtained by tensile-type dynamic viscoelastic measurement.
Inventors:
MATSUMURA MEI (JP)
NISHIO SHOTARO (JP)
KAWAI KIWAMU (JP)
NISHIO SHOTARO (JP)
KAWAI KIWAMU (JP)
Application Number:
PCT/JP2023/032745
Publication Date:
March 21, 2024
Filing Date:
September 07, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B32B27/36; G09F9/00; G09F9/30
Domestic Patent References:
| WO2021182191A1 | 2021-09-16 | |||
| WO2021215349A1 | 2021-10-28 |
Foreign References:
| JP2001288283A | 2001-10-16 | |||
| JP2002212316A | 2002-07-31 | |||
| JP2022085847A | 2022-06-08 | |||
| JP2022113634A | 2022-08-04 | |||
| JP2022031193A | 2022-02-18 | |||
| JP2022054571A | 2022-04-07 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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