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.:
Date of Patent:
Aug. 22, 2023
Filed:
Sep. 18, 2020
3m Innovative Properties Company, St. Paul, MN (US);
Mario A. Perez, Burnsville, MN (US);
Mary E. Johansen, Woodbury, MN (US);
Sebastian Goris, Inver Grove Heights, MN (US);
Lesbia E. Giron, Roseville, MN (US);
Rajdeep S. Kalgutkar, Woodbury, MN (US);
Ta-Hua Yu, Woodbury, MN (US);
Paul T. Hines, St. Paul, MN (US);
Stephen A. Johnson, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A multilayer film comprises first, second, and third layers. The first layer comprises at least one aromatic polyester, and has a loss modulus at 1 hertz and 25° C. of at least 70 megapascals. The second layer is thermoplastic and has a loss modulus at 1 hertz and 25° C. of less than or equal to 60 megapascals and comprises a thermoplastic elastomer and a polyamide. The third layer contacts the second layer opposite the first layer and has a loss modulus at 1 hertz and 25° C. of at least 70 megapascals. The second layer is sandwiched between the first and third layers. A method of making the multilayer film by coextrusion is also disclosed.