Title:
LAMINATED POLYESTER FILM
Document Type and Number:
Japanese Patent JP2023039591
Kind Code:
A
Abstract:
To provide a biaxially oriented polyester film that has a highly smooth surface, good releasability, and excellent adhesion property with a polyester resin layer being a substrate.SOLUTION: A laminated polyester film has a polyester film and a mold releasable resin layer (P1) in which the mold releasable resin layer (P1) is on at least one surface layer, and fulfills the following requirements (1) to (3). (1) In the case where the surface of the mold releasable resin layer (P1) is face A, and the arithmetic average roughness of the face A is SaA (nm), SaA is 0.5 or more and 4.5 or less. (2) In the case where protrusions are present on the surface of the face A, the number of protrusions having the height of 50nm or more is N50nmA (pcs./mm2), N50nmA is 200 or less. (3) In the case where the water contact angle of the face A is CaA(°), CaA is 90 or more and 120 or less.SELECTED DRAWING: None
Inventors:
SENDAI TOSHIHIRO
HIGASHIOJI TAKUJI
HIGASHIOJI TAKUJI
Application Number:
JP2021146792A
Publication Date:
March 22, 2023
Filing Date:
September 09, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
B32B27/36; B32B27/00