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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 12559652 B1

PDFFull Text
Date of Patent:
Feb. 24, 2026

Filed:

Aug. 18, 2021

Film including solvent barrier and primer layer

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Tianyu Wu, St. Paul, MN (US);

Rajdeep S. Kalgutkar, Woodbury, MN (US);

Ning Zhou, Vadnais Heights, MN (US);

David B. Bilbrey, Woodbury, MN (US);

Assignee:

3M Innovative Properties Company, St. Paul, MN (US);

Attorneys:

Julie Lapos-Kuchar

Daniel J. Iden

Primary Examiner:

Frank D Ducheneaux

Int. Cl.
CPC ...
C09J 7/29 (2018.01); B32B 27/04 (2006.01); B32B 27/34 (2006.01); B32B 37/15 (2006.01); C08J 7/043 (2020.01); C09J 7/20 (2018.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 7/40 (2018.01); C09J 7/50 (2018.01);
U.S. Cl.
CPC ...
C09J 7/29 (2018.01); B32B 27/34 (2013.01); B32B 37/15 (2013.01); C08J 7/043 (2020.01); C09J 7/20 (2018.01); C09J 7/255 (2018.01); C09J 7/38 (2018.01); C09J 7/40 (2018.01); C09J 7/50 (2018.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2307/702 (2013.01); B32B 2307/75 (2013.01); B32B 2377/00 (2013.01); C08J 2477/00 (2013.01); C09J 2467/006 (2013.01); C09J 2477/001 (2013.01);
Abstract

Films including solvent barriers and primer layers are described. In particular, films including a substrate, the substrate including polylactic acid, a primer layer disposed on the substrate, a barrier layer disposed on the surface of the primer layer opposite the substrate, and an adhesive layer disposed on a surface of the barrier layer opposite the primer layer. The barrier layer includes an amorphous aliphatic polyamide with a glass transition temperature of at least 40 #C. Such films can provide acceptable adhesion and barrier performance to polylactic acid based graphics film systems.

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