BIAXIALLY STRETCHED POLYAMIDE FILM - KOHJIN FILM & CHEMICALS CO LTD

Title:

BIAXIALLY STRETCHED POLYAMIDE FILM

Document Type and Number:

WIPO Patent Application WO/2023/243639

Kind Code:

A1

Abstract:

[Problem] To provide a biaxially stretched polyamide film for forming a packaging bag that can be cut easily in a straight line and that has excellent tear resistance. [Solution] This biaxially stretched polyamide film includes 70-95 parts by mass of aliphatic polyamide, 5-30 parts by mass of polymethaxylylene adipamide, and 0.01-0.20 parts by mass of an oxide or a hydroxide of a group 2 element in the periodic table. The shrinkage percentages after steam treatment at 120℃ of an end-portion film piece and a center film piece, which are cut out from a mill roll of the film, in the longitudinal direction (MD direction) and the width direction (TD direction) fall in a range of 2.0-7.0%, and the absolute value of the difference in the shrinkage percentages after steam treatment at 120℃ of the end-portion film piece and the center film piece in directions at 45° and 135° with respect to the width direction (TD direction) is at most 1.0. The end-portion film piece is a square-shaped film piece which has a side length of 200 mm and which is cut out from a film mill roll having a width of 2000 mm such that a position 300 mm inward from the right edge or the left edge in the width direction becomes the center of the square shape. The center film is a square-shaped film piece which has a side length of 200 mm and which is cut out from the mill roll such that the center position of the mill roll in the width direction becomes the center of the square shape.

More Like This:

JPH04136063	POLYESTER RESIN COMPOSITION AND ITS SHEET AND MOLDING
JP2006152209	RESIN SHEET AND PACKAGING MATERIAL FOR ELECTRONIC PARTS
JP2021107534	POLYIMIDE FILM, METHOD FOR PRODUCING THE SAME AND FLEXIBLE DEVICE

Inventors:

KIYOTA HAJIME (JP)
CHIHARA YURIA (JP)

Application Number:

PCT/JP2023/021961

Publication Date:

December 21, 2023

Filing Date:

June 13, 2023

Export Citation:

Click for automatic bibliography generation Help

Assignee:

KOHJIN FILM & CHEMICALS CO LTD (JP)

International Classes:

C08J5/18; B29C55/12; B32B27/32; C08K3/22; C08L77/02; C08L77/06

Domestic Patent References:

WO2022216290A1

2022-10-13

Foreign References:

JP2017193616A	2017-10-26
JP2017209900A	2017-11-30
JP2015150785A	2015-08-24