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US 5,405,675 AGranted
Embossed multilayer film
AssigneeMinnesota Mining and Manufacturing Company
InventorsRaymond M. Sawka, Carl W. McMullen, Chia-Tie Ho, Stefan Weigl
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Abstract
An embossed multilayer film comprises an embossed base layer and a conformable, substantially uniformly thick protective surface layer that overlies the base layer. In one embodiment, the embossed multilayer film can be re-embossed. In another embodiment, the surface layer is provided by a polyurethane-based material. The invention also relates to a method of providing such an embossed multilayer film.
Claims33
An embossed multilayer film comprising:
- (a) an embossed base layer provided by a material selected from the group consisting of polyolefins, alkyl acrylate modified polyolefins, acid based ionomers, thermoplastic olefins, ethylene/vinyl acetate copolymers, acrylonitrile-butadiene-styrene terpolymer, ethylene-propylene-diene monomer terpolymer, and suitable blends and mixtures of any of the foregoing;
- and
- (b) a conformable, protective surface layer that has a substantially uniform thickness that does not vary by more than about 20% and which overlies the base layer;
- wherein, the base layer can be either thermomechanically or high frequency re-embossed.
1 more element
An embossed multilayer film comprising:
- (a) an embossed base layer selected from the group consisting of rubber modified ethylene-propylene copolymers and acid based ionomers;
- and
- (b) a conformable, polyurethane-based surface layer that has a substantially uniform thickness that does not vary by more than about 20% and which overlies the base layer.
Dependencies are inferred from the claim text.