Title:
BIAXIALLY ORIENTED MULTILAYER POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2024/018936
Kind Code:
A1
Abstract:
[Problem] To provide a biaxially oriented multilayer polyester film that, in comparison with conventional technology, can more effectively prevent the occurrence of pinholes and winding creases in a production process for a resin sheet such as a ceramic green sheet. [Solution] A biaxially oriented multilayer polyester film having an A layer and a B layer, wherein the A layer contains particles, the surface roughness of the A layer has a maximum peak height (SRp) of 1.0 μm or less, and the relationship between the maximum size Dmax and the minimum size Dmin of the particles within the polyester film satisfies formula 1 (formula 1: 0.5≤(Dmax-Dmin)≤5.5), the biaxially oriented multilayer polyester film being usable in a mold release film for resin sheet formation.
Inventors:
KAJITA NAOFUMI (JP)
SHIMIZU AKIRA (JP)
SHIMIZU AKIRA (JP)
Application Number:
PCT/JP2023/025342
Publication Date:
January 25, 2024
Filing Date:
July 07, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C33/68; B29C55/12; B32B27/00; B32B27/36; B29K67/00; B29L9/00
Domestic Patent References:
| WO2020085308A1 | 2020-04-30 | |||
| WO2021033494A1 | 2021-02-25 |
Foreign References:
| JP2018059083A | 2018-04-12 | |||
| JP2020049803A | 2020-04-02 |
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