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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 11286405 B1

PDFFull Text
Date of Patent:
Mar. 29, 2022

Filed:

Dec. 01, 2017

Adhesive articles comprising polylactic acid polymer film and method of making

Applicant:

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

Inventors:

William W. Merrill, Mahtomedi, MN (US);

Jeffrey P. Kalish, St. Paul, MN (US);

Jacob D. Young, St. Paul, MN (US);

Ramesh C. Kumar, Woodbury, MN (US);

Sonja S. Mackey, St. Paul, MN (US);

Kanta Kumar, Woodbury, MN (US);

Ignatius A. Kadoma, Cottage Grove, MN (US);

Michael D. Crandall, Sparks, NV (US);

Adam R. Wohl, Mahtomedi, MN (US);

Assignee:

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

Attorney:

Carolyn A. Fischer

Primary Examiner:

Joseph S Del Sole

Assistant Examiner:

Lawrence D Hohenbrink, Jr

Int. Cl.
CPC ...
C09J 7/20 (2018.01); C09J 7/25 (2018.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); C09J 133/08 (2006.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01); B29L 9/00 (2006.01);
U.S. Cl.
CPC ...
C09J 7/255 (2018.01); B29C 48/0018 (2019.02); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); C09J 7/201 (2018.01); C09J 133/08 (2013.01); B29C 2791/001 (2013.01); B29K 2067/046 (2013.01); B29K 2105/0097 (2013.01); B29L 2009/00 (2013.01); C09J 2433/00 (2013.01); C09J 2467/006 (2013.01);
Abstract

A method of making an adhesive article is described comprising melt extruding a core film layer comprising a composition comprising at least 50% of a polylactic acid polymer. The method further comprises melt extruding an adhesive layer on a major surface of the core film layer such that regions of interdiffusion are present between the core film layer and adhesive layer. The adhesive layer may comprise C1-C10 (meth)acrylic acid or ester thereof, vinyl acetate, ethylene vinyl acetate, hydrolysed polyvinyl alcohol and combinations thereof. The adhesive layer may also be a pressure sensitive adhesive. The method further comprises melt extruding a release film layer on an opposing major surface of the core film layer. The layers are sequentially extruded or co-extruded and can be uniaxially or biaxially oriented. Articles comprising a core film layer comprising a composition comprising at least 50% of a polylactic acid polymer and an adhesive layer disposed on a major surface of the core layer are also described.

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