Process of making polyurethane film

Details Process of making polyurethane film Process of making polyurethane film

1997-09-15

1999-06-08

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264 78, 264211, B29C 4700, B29C 5528

Patent

active

059102845

ABSTRACT:
A composite film of two layers, including a graphic color layer containing at least 50 wt % thermoplastic polyurethane, at least 10 wt % pigment, and a polyester elastomer, and an adhesive layer containing a thermoplastic adhesive. The color layer contains a non-blooming internal wax lubricant constituting less than about 0.1 wt % of the color layer. A combination including a laminate of two layers, one layer of which contains a polyurethane and the other layer of which includes an amorphous polyester directly adhered to a fabric, the improvement including the layer which contains a polyurethane, having an opaque exposed surface substantially free of surface lubricants. In a process for extruding polyurethane film, the improvement including mixing no more than about 0.1 wt % of a non-blooming internal wax lubricant in the polyurethane, prior to extrusion.

REFERENCES:
patent: 3660212 (1972-05-01), Liebe, Jr.
patent: 3963679 (1976-06-01), Ullrich et al.
patent: 3966857 (1976-06-01), Charlton et al.
patent: 4423106 (1983-12-01), Mahn

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