Patent ID: 6540867
Filing Date: 2003-04-01
Classification: B29C,B29K,B32B,C08J,Y10S,Y10T

Abstract:
A process for preparing a composite comprising:(1) a polyurethane matrix including a fibrous reinforcement material; and (2) a layer of film bound to a surface of the matrix, said process comprising applying to the fibrous reinforcement material a mixture of polyurethane-forming liquid reactants present in such ratio as to provide available NCO groups, placing a thermoplastic polyurethane film containing available hydroxy groups into contact with the mixture of reactants as applied to said fibrous reinforcement material and applying a vacuum to remove trapped gases and to consolidate the reinforcement material and film before the polyurethane-forming reaction begins, the film being held against the fibrous reinforcement material while the polyurethane matrix is formed whereby a chemical bond is formed between the film and the matrix by reaction of the available hydroxy groups of the thermoplastic polyurethane film and NCO groups in the matrix-forming reactant mixture.