B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
18/1015
B32B 5/14 (2006.01) B29C 43/20 (2006.01) B29C 51/14 (2006.01) B60R 13/08 (2006.01)
Patent
CA 1073175
PROCESS FOR MAKING SOUND INSULATION COMPONENTS Abstract of the Disclosure A process for making composite contoured sound insulating panels of a type suitable for use adjacent to structural panels of automobile vehicle bodies, which in accordance with one embodiment of the present invention, comprises forming a fibrous pad incorporating controlled amounts of a heat curable thermosetting binder and a heat softenable thermoplastic binder distributed in a controlled manner therethrough. The pad is subjected to a preliminary curing step to bond the fibers together into an integral mass, whereafter a dense liquid vinyl plastisol coating is applied to at least one face surface of the pad, which thereafter is heated to effect a fusion of the coating into a heat softened integral layer, effecting a simultaneous heat softening of the thermoplastic binder, whereafter the heated pad is placed between appropriately contoured mold surfaces and is compressed to impart a preselected contour thereto and localized emboss- ments therein and a desired surface finish to the plastisol layer, while simultaneously cooling the pad to effect a rigid- ification of the thermoplastic binder and the layer so as to retain the composite pad in the preselected contoured and em- bossed configuration. In accordance with an alternative em- bodiment of the disclosed process, the pad is subjected to a preliminary molding step followed by the coating step and is subjected to a final molding step after the plastisol coating has been fused at an elevated temperature.
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