Venting assembly and microporous membrane composite

摘要

The technology encompassed by the current disclosure generally relates to membrane composites that can be used in acoustic venting assemblies. In one embodiment of the technology disclosed herein, a venting media composite has a microporous membrane layer and a coating on the microporous membrane layer to form a composite. The basis weight of the composite is at least about 0.5% higher than a basis weight of the microporous membrane layer without the coating. In some embodiments the composite has a decreased insertion loss than its membrane-only counterpart.

主权项

1. A venting media composite comprising:
a microporous membrane layer comprising polytetrafluoroethylene; and a coating on the microporous membrane layer, wherein the microporous membrane layer and the coating are a composite, wherein the basis weight of the venting media composite is at least about 3% higher than a basis weight of the microporous membrane layer without the coating, and wherein the composite has an average insertion loss less than or equal to the average insertion loss of the microporous membrane layer without the coating in a frequency range from 300 Hz to 4000 Hz.