Back to results
US 3,941,633 AGranted
Plastic laminate, article and method of making same
AssigneeSeton Company
InventorsTsu-Huai Wang, Edgar T. Key
Life of this patent
Estimating the term…
Abstract
A plastic laminate and shaped article having a polyurethane film substrate, a fabric superstrate and an intermediate layer of polyurethane foam. The polyurethane foam layer is cast upon the polyurethane film to provide a substantially integral laminate. The fabric layer is also bonded to the foam layer, preferably prior to complete curing, permitting the use of unnapped fabrics.
Claims6
A method of making a laminate, comprising the steps of:
- a. casting a layer of substantially fully reacted polyurethane as a substrate on a carrier treated with a release agent,
- b. drying of said polyurethane substrate layer,
- c. casting a layer of substantially completely foamed polyurethane on said polyurethane substrate,
- d. heating said laminate to at least partially curing said polyurethane foam layer,
- e. bonding a flexible sheet over said polyurethane foam layer,
- and
- f. completely curing the polyurethane layer.
4 more elements
Dependencies are inferred from the claim text.