Invention Application
- Patent Title: MULTILAYER FILM AND METHOD OF MAKING THE SAME
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Application No.: US17639708Application Date: 2020-09-18
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Publication No.: US20220347982A1Publication Date: 2022-11-03
- Inventor: Mario A. Perez , Mary E. Johansen , Sebastian Goris , Lesbia E. Giron , Rajdeep S. Kalgutkar , Ta-Hua Yu , Paul T. Hines , Stephen A. Johnson
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- International Application: PCT/IB2020/058727 WO 20200918
- Main IPC: B32B27/08
- IPC: B32B27/08 ; B32B27/36 ; B32B27/34 ; B32B27/30 ; B32B27/32 ; B32B7/022

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.
Public/Granted literature
- US11731408B2 Multilayer film and method of making the same Public/Granted day:2023-08-22
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