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:
Oct. 08, 2013
Filed:
Jan. 26, 2012
Charlie C. Ho, Woodbury, MN (US);
Kenneth J. Halford, Woodbury, MN (US);
Michael A. Johnson, Stillwater, MN (US);
Bryan C. Feisel, Hudson, WI (US);
Eugene C. Ostertag, Afton, MN (US);
Robert D. Taylor, Stacy, MN (US);
Charlie C. Ho, Woodbury, MN (US);
Kenneth J. Halford, Woodbury, MN (US);
Michael A. Johnson, Stillwater, MN (US);
Bryan C. Feisel, Hudson, WI (US);
Eugene C. Ostertag, Afton, MN (US);
Robert D. Taylor, Stacy, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A method of making a multilayer protective film. The method comprises: (a) forming a PU layer comprising an at least partially crosslinked polyurethane, the at least partially crosslinked polyurethane comprising at least one of a polyester-based polyurethane or a polycarbonate-based polyurethane; (b) forming a TPU layer comprising a polycaprolactone-based thermoplastic polyurethane; (c) forming a PSA layer comprising a pressure sensitive adhesive; (d) bonding one major surface of the PU layer to one major surface of the TPU layer; and (e) bonding the PSA layer to an opposite major surface of the TPU layer; wherein the TPU layer is sandwiched between the PU layer and the PSA layer. The multilayer film may be used to protect painted surfaces of vehicle body parts.