Patent ID: 7566475
Filing Date: 2009-07-28
Classification: B32B,B60R,E04B,G10K,Y10T

Abstract:
1. A method of making an acoustic insulator, the method comprising: depositing a composition consisting of thermoplastic particulates on a first surface of a base layer; and heating the particulate such that the particulate at least partially melts and penetrates the first surface of the base layer, thereby increasing density and airflow resistance of the base layer proximate the first surface such that the base layer, proximate the first surface, has an areal mass in the range of 0.1 to 1.0 kg/m wherein, after the depositing and heating steps: 1) a majority of the particulate is disposed within a first portion of the base layer adjacent the first surface, the first surface being an outer surface of the base layer; 2) the first portion has an areal mass in the range of 0.1 to 1.0 kg/m