Patent ID: 6616789
Filing Date: 2003-09-09
Classification: B29C,B32B,B60R,D06N,G10K,Y10T

Abstract:
A process for manufacturing a sound insulating carpet structure comprising:providing a textile material having interior and exterior sides, a generally non-permeable polymeric layer overlying the exterior side, and a backing layer overlying the polymeric layer to form a laminated product; presenting the laminated product having an initial surface area to a forming mold having a greater surface area that retains the perimeter of the laminated product in a fixed position relative to the mold; closing the forming mold under a controlled pressure, heat and time cycle sufficient to expand the laminated product to conform to the mold and form voids in the polymeric layer to render the laminated product permeable with a permeability of no more than 500 rayls (N s/m3); and curing the permeable laminated product.