logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12391827 B1

PDFFull Text
Date of Patent:
Aug. 19, 2025

Filed:

Mar. 24, 2021

Biaxially stretched polyamide film

Applicant:

Toyobo Co., Ltd., Osaka, JP;

Inventors:

Kazushige Ueda, Inuyama, JP;

Takamichi Goto, Inuyama, JP;

Takuro Endo, Inuyama, JP;

Assignee:

TOYOBO CO., LTD., Osaka, JP;

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Michael C Miggins

Int. Cl.
CPC ...
C08L 77/06 (2006.01); B32B 1/00 (2024.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B65D 65/40 (2006.01); C08J 5/18 (2006.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 177/06 (2006.01);
U.S. Cl.
CPC ...
C08L 77/06 (2013.01); B32B 1/00 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B65D 65/40 (2013.01); C08J 5/18 (2013.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 177/06 (2013.01); B32B 2250/24 (2013.01); B32B 2250/40 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2270/00 (2013.01); B32B 2307/414 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/558 (2013.01); B32B 2307/581 (2013.01); B32B 2439/06 (2013.01); B32B 2439/70 (2013.01); C08J 2377/06 (2013.01); C08J 2467/02 (2013.01);
Abstract

It is provided that a biaxially stretched polyamide film that has excellent resistance to pinhole formation due to bending, has excellent resistance to pinhole formation due to repeated contact, has excellent piercing resistance, and further can suppress generation of foreign matter during film formation. A biaxially stretched polyimide film comprising a functional layer (layer B) laminated on at least one surface of a base layer (layer A), wherein the base layer (layer A) contains at least (a) 70 to 99% by mass of a polyamide 6 resin, and (b) 1 to 20% by mass of an aliphatic or aromatic-aliphatic polyester resin, and the functional layer (layer B) contains at least 70% by mass or more of a polyamide 6 resin.

Find Patent Forward Citations

Loading…