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Title:
BIAXIALLY-ORIENTED POLYPROPYLENE FILM
Document Type and Number:
WIPO Patent Application WO/2023/127534
Kind Code:
A1
Abstract:
[Problem] To provide a biaxially-oriented polypropylene film that has excellent adhesion during vapor-deposition, coating, and laminating with other films without compromising the excellent transparency and mechanical properties inherent to the biaxially-oriented polypropylene film, and that is suitable as a processed raw fabric having fine slide properties and blocking resistance. [Solution] This biaxially-oriented polypropylene film has a base material layer (A) containing a polypropylene-based resin as a main component, satisfies the following (1)-(4), and has a surface layer (B) containing a polypropylene-based resin as a main component. (1) The number of projections having a height of 500 nm or more within a surface area of 2000 μm2 is 50-200. (2) The wet tension of the surface is 38 mN/m or more. (3) The Martens hardness of the surface is 350 N/mm2 or less. (4) The arithmetic mean roughness (Ra) of the surface is 1.5-3.0 nm.

Inventors:
KANAYA ATSUSHI (JP)
IMAI TORU (JP)
Application Number:
PCT/JP2022/046274
Publication Date:
July 06, 2023
Filing Date:
December 15, 2022
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B27/32
Domestic Patent References:
WO2017221781A12017-12-28
WO2017169952A12017-10-05
WO2012002123A12012-01-05
WO2019044758A12019-03-07
WO2018142983A12018-08-09
Foreign References:
JP2002154187A2002-05-28
JP2015178594A2015-10-08
EP2181843A12010-05-05
US20210229408A12021-07-29
US6410132B12002-06-25
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