Title:
POLYESTER FILM AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/058059
Kind Code:
A1
Abstract:
Provided is a polyester film for a folding-type display, the polyester film having excellent mass productivity and heat resistance, and having reduced occurrences of distortions in an image displayed on a folding portion after being repeatedly folded, and reduced occurrences of cracks in a folding section. The polyester film for a folding-type display has a thickness of 10-125 μm, wherein the high-temperature hold angle in a bending direction is 85° or greater, the refractive index in the bend direction of the polyester film is 1.610-1.710, and the refractive index in a direction orthogonal to the bending direction is 1.750-1.870. The high-temperature hold angle refers to an angle formed by an folded portion that is made after fixing the polyester film for 18 hours under heating at 85°C such that 1.7% strains are produced on both surfaces of a bending portion thereof.
More Like This:
| JP2000144403 | FORMATION OF FILM ON ROLL FILM AND FILM FORMING DEVICE |
| JP6838555 | Polyamide resin composition, film |
| JP2003064193 | POLYPROPYLENE FILM |
Inventors:
NISHIO SHOTARO (JP)
MATSUMURA MEI (JP)
SHIMIZU AKIRA (JP)
MATSUMURA MEI (JP)
SHIMIZU AKIRA (JP)
Application Number:
PCT/JP2023/032747
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:
| WO2021215349A1 | 2021-10-28 | |||
| WO2020241313A1 | 2020-12-03 | |||
| WO2020162120A1 | 2020-08-13 | |||
| WO2018159285A1 | 2018-09-07 | |||
| WO2021199896A1 | 2021-10-07 |
Foreign References:
| JP2022124921A | 2022-08-26 | |||
| JP2022122202A | 2022-08-22 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Download PDF: