Title:
BIAXIALLY ORIENTED POLYESTER FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2020/090673
Kind Code:
A1
Abstract:
Provided is a polyester film roll which has less wrinkles and film surface defects, exhibits no deviation of winding, and is suitable for secondary processing such as coating and vapor deposition. The polyester film roll is obtained by winding a biaxially oriented polyester film around a core, and is characterized by satisfying requirements (1)-(3) below: (1) the average winding hardness of the surface of the polyester film roll is in the range of 500-700; (2) the variation rate of the winding hardness of the surface of the polyester film roll in the film width direction is 1-5%; and (3) the variation rate of the average winding hardness from the surface of the polyester film roll to the core is 3-10%.
Inventors:
MANABE NOBUYUKI (JP)
HARUTA MASAYUKI (JP)
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2019/041984
Publication Date:
May 07, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B65H18/28
Foreign References:
| JP2012046736A | 2012-03-08 | |||
| JP2018123318A | 2018-08-09 | |||
| JP5872595B2 | 2016-03-01 | |||
| JP2016038534A | 2016-03-22 | |||
| JP2012021164A | 2012-02-02 | |||
| JPH10119172A | 1998-05-12 | |||
| JPH1110725A | 1999-01-19 | |||
| JP2006299078A | 2006-11-02 | |||
| JPS63252853A | 1988-10-19 |
Other References:
See also references of EP 3875409A4
Download PDF: