Title:
POLYESTER FILM
Document Type and Number:
Japanese Patent JP2021109441
Kind Code:
A
Abstract:
To provide a polyester film which has surfaces excellent in conveyance property and winding property on both film sides, and has good optical characteristics.SOLUTION: A polyester film contains a polyester resin satisfying the following requirements (1) to (2) as a main component. (1) When a root mean square roughness Sq (nm) of both surfaces of the polyester film is measured, a surface having a high Sq value is defined as A surface, a root mean square roughness of the A surface is defined as SqA (nm), a surface opposite to the A surface is B surface, and a root mean square roughness of the B surface is defined as SqB (nm), the sqA is 3.0 or more and 4.8 or less. (2) A coefficient of static friction between the A surface and the B surface is 1.0 or less.SELECTED DRAWING: None
Inventors:
SENDAI TOSHIHIRO
SUZUKI TADAMASA
HIGASHIOJI TAKUJI
SUZUKI TADAMASA
HIGASHIOJI TAKUJI
Application Number:
JP2020218319A
Publication Date:
August 02, 2021
Filing Date:
December 28, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
B32B27/36; C08J5/18; C08K3/013; C08L67/00; G03F7/004; G03F7/09