Back to results
US 4,248,652 AGranted
Method of making leatherlike materials (A)
AssigneeInmont Corporation
InventorsFrank P. Civardi, Stanley G. Sova, Bohdan V. Burachinsky
Life of this patent
Estimating the term…
Abstract
A system for the manufacture of leatherlike materials, particularly for shoe uppers, which avoids pollution, toxicity and fire hazards and makes it possible for the shoe manufacturer to make his shoe upper materials as required with a minimum of investment in inventory of raw materials and with simple, relatively inexpensive equipment.
Claims20
Process for making artificial leather which comprises
- (a) providing a supply of continuous web of fibrous material and a separate supply of continuous sheet of microporous elastomeric polyurethane
- (b) continuously pulling said web and sheet lengthwise under tension from said supplies and assembling said web and sheet together in face-to-face relationship under tension
- (c) maintaining an adhesive material in heat-softened condition at the interface between said web and said sheet and in adhesive contact with said sheet,
- (d) placing a thin preformed skin on the outer surface of said microporous polyurethane, said skin having a surface, in contact with said microporous outer surface, which is heat fusible to said outer surface,
- (e) passing the resulting assemblage continuously lengthwise onto a rotating embossing roll having a hot grain-embossing surface in contact with said skin at a temperature above the temperature at which said skin fuses to said outer surface, and
- (f) continuously removing said assemblage lengthwise from said embossing roll.
3 more elements
Process for making artificial leather which comprises
- (a) providing a supply of continuous web of fibrous material and a separate supply of continuous sheet of microporous elastomeric polyurethane
- (b) continuously pulling said web and sheet lengthwise under tension from said supplies and assembling said web and sheet together in face-to-face relationship under tension
- (c) maintaining an adhesive material in heat-softened condition at the interface between said web and said sheet and in adhesive contact with said sheet
- (d) passing the resulting assemblage continuously lengthwise onto a rotating embossing roll having a hot grain-embossing surface in contact with the outer surface of said microporous polyurethane at a temperature within about 15.degree. C. of the melting-sticking temperature of said outer surface, and
- (e) continuously removing said assemblage lengthwise from said embossing roll.
2 more elements
Dependencies are inferred from the claim text.