US 12,138,903 B2
Surface impression resistant film constructions and methods
Viktor Dannewitz, Langenfeld (DE); Ralf Burmeister, Dormagen-Delrath (DE); Thomas Meyer, Wuppertal (DE); and Hubert Werner, Erkrath (DE)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/967,915
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Feb. 5, 2019, PCT No. PCT/IB2019/050911
§ 371(c)(1), (2) Date Aug. 6, 2020,
PCT Pub. No. WO2019/155358, PCT Pub. Date Aug. 15, 2019.
Claims priority of provisional application 62/626,941, filed on Feb. 6, 2018.
Prior Publication US 2021/0031490 A1, Feb. 4, 2021
Int. Cl. B32B 7/03 (2019.01); B32B 7/06 (2019.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01)
CPC B32B 7/03 (2019.01) [B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/285 (2013.01); B32B 27/304 (2013.01); B32B 27/32 (2013.01); B32B 2307/402 (2013.01); B32B 2307/412 (2013.01); B32B 2307/414 (2013.01); B32B 2307/538 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A web of film material wound about a central longitudinal axis to provide a roll, the film material comprising:
a conformable base film comprising a first surface and an opposite second surface, the conformable base film comprising at least one layer of polyvinyl chloride film;
an adhesive layer comprising:
a first surface bonded to the second surface of the base film; and
an opposite second surface;
a release liner releasably attached to the second surface of the adhesive layer; and
a protective film layer releasably attached to the first surface of the conformable base film without another layer, including any adhesive layer, between the protective film layer and the at least one layer of polyvinyl chloride film such that the protective film layer is in direct contact with the first surface of the conformable base film, and the bonding force between the protective film layer and the first surface of the conformable base film is achieved by weak intermolecular forces, having a bonding force in the range of about 2 to 6 cN/25.4 mm measured at a separation speed of 2286 mm/min, the protective film layer provided in a thickness of approximately 17 micrometers or thinner, and wherein the protective film layer is conformable and has an elongation that is the same or higher than an elongation of the base film.