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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 11529787 B1

PDFFull Text
Date of Patent:
Dec. 20, 2022

Filed:

Mar. 31, 2017

Multilayer tubes

Applicant:

Ube Industries, Ltd., Ube, JP;

Inventors:

Aki Kurumiya, Ube, JP;

Koji Nakamura, Ube, JP;

Assignee:

UBE INDUSTRIES, LTD., Ube, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Lee E Sanderson

Int. Cl.
CPC ...
B32B 1/08 (2006.01); B32B 27/34 (2006.01); C08L 77/00 (2006.01); C08L 77/02 (2006.01); F16L 11/127 (2006.01); C08L 77/06 (2006.01); C08L 77/10 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B32B 37/15 (2006.01);
U.S. Cl.
CPC ...
B32B 1/08 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/322 (2013.01); B32B 27/34 (2013.01); B32B 37/153 (2013.01); C08L 77/00 (2013.01); C08L 77/02 (2013.01); F16L 11/127 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2250/04 (2013.01); B32B 2250/24 (2013.01); B32B 2264/108 (2013.01); B32B 2270/00 (2013.01); B32B 2274/00 (2013.01); B32B 2307/202 (2013.01); B32B 2307/306 (2013.01); B32B 2307/558 (2013.01); B32B 2307/714 (2013.01); B32B 2327/18 (2013.01); B32B 2377/00 (2013.01); B32B 2398/20 (2013.01); B32B 2597/00 (2013.01); C08L 77/06 (2013.01); C08L 77/10 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01);
Abstract

A multilayer tube is provided which includes a layer including a specific aliphatic polyamide composition and a layer including a semi-aromatic polyamide composition including a semi-aromatic polyamide with a specific structure, these layers being adjacent to each other, wherein the aliphatic polyamide composition includes an aliphatic polyamide having a specific ratio of the number of methylene groups to the number of amide groups, a polyamide having a specific difference in absolute value of solubility parameter SP from the aliphatic polyamide, and an elastomer polymer including a structural unit derived from an unsaturated compound having a carboxyl group and/or an acid anhydride group.

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