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Sound absorbent thin-layer laminate
Patent #: 6,720,068
Inventor(s): William Ray Vanbemmel, Anthony C. Vulpitta and Thorsten Alts
Company: Rieter Automotive (International) AG
Filed: 1999-03-01
Issued: 2004-03-30
Description:
1. A sound-absorbing thin-layer laminate comprising at least a backing layer and an open-celled fibre layer, wherein said backing layer consists of an open-celled plastic foam layer with a density of 16 to 32 kg/m3 and a thickness of at least 6 mm, wherein the open-celled fibre layer consists essentially of melt-blown microfibres, the diameter of which ranges from 1 to 10 micrometers, and a weight per unit area of from 20 to 200 g/m2, wherein the thin-layer laminate exhibits air flow resistance in the range of 500
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