Title:
POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2021/060004
Kind Code:
A1
Abstract:
This polyester film comprises a polyester layer (A) containing a black pigment, and a polyester layer (B) disposed on at least one surface of the polyester layer. The polyester layer (B) is substantially free of particles or contains particles (X) having an average particle diameter of 1.0 μm or less. The transmission density (OD value) of the polyester film is 0.4 or greater, and the difference in gloss (Gs60°) between the front surface and the back surface of the film is 3.0 or less. The present invention can provide a polyester film having excellent light-blocking ability, a highly smooth surface, and a small difference in gloss between the front surface and the back surface.
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Inventors:
KAWANAMI KEITA (JP)
TOJO YOSHIAKI (JP)
TOJO YOSHIAKI (JP)
Application Number:
PCT/JP2020/034357
Publication Date:
April 01, 2021
Filing Date:
September 10, 2020
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
B32B27/36
Foreign References:
| JP2007045895A | 2007-02-22 | |||
| JPS6342862A | 1988-02-24 | |||
| JP2011131391A | 2011-07-07 | |||
| JP2016168833A | 2016-09-23 | |||
| JP2008056871A | 2008-03-13 |
Attorney, Agent or Firm:
TAGUCHI, Masahiro et al. (JP)
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