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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 11254082 B1

PDFFull Text
Date of Patent:
Feb. 22, 2022

Filed:

Sep. 03, 2014

Multi-layer tube

Applicant:

Ube Industries, Ltd., Ube, JP;

Inventors:

Koji Nakamura, Ube, JP;

Shigekazu Okamura, Ube, JP;

Hiroaki Fujii, Ube, JP;

Assignee:

UBE INDUSTRIES, LTD., Ube, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Eli D Strah

Int. Cl.
CPC ...
B32B 1/08 (2006.01); B32B 27/34 (2006.01); F16L 9/12 (2006.01); B32B 27/08 (2006.01); F16L 9/133 (2006.01); C08L 77/00 (2006.01); C08L 101/06 (2006.01); C08L 77/06 (2006.01); C08L 77/02 (2006.01); B32B 27/32 (2006.01);
U.S. Cl.
CPC ...
B32B 1/08 (2013.01); B32B 27/08 (2013.01); B32B 27/322 (2013.01); B32B 27/34 (2013.01); C08L 77/00 (2013.01); C08L 77/02 (2013.01); C08L 77/06 (2013.01); C08L 101/06 (2013.01); F16L 9/12 (2013.01); F16L 9/133 (2013.01); B32B 2250/24 (2013.01); B32B 2307/202 (2013.01); B32B 2307/558 (2013.01); B32B 2307/7265 (2013.01); B32B 2597/00 (2013.01); B32B 2605/08 (2013.01);
Abstract

The present invention is a multi-layer tube comprising at least two layers having an (a) layer containing an aliphatic polyamide composition (A) and a (b) layer containing a semi-aromatic polyamide composition (B) containing a specific semi-aromatic polyamide (B1), wherein the aliphatic polyamide composition (A) contains a specific amount of an aliphatic polyamide (A1) and a specific amount of an elastomer polymer (A2) containing an unsaturated compound having a carboxyl group and/or acid anhydride group, and the product of the terminal amino group concentration [X] of the aliphatic polyamide (A1) per g of the aliphatic polyamide composition (A) and the total concentration [Y] of the carboxyl group and acid anhydride group of the elastomer polymer (A2) per g of the aliphatic polyamide composition (A) is a specific amount.

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