The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2011
Filed:
Apr. 16, 2008
Dirk Soltau, Düsseldorf, DE;
Michael Hansen, Cologne, DE;
Thomas Gross, Wermelskirchen, DE;
Dagmar Ulbrich, Monheim, DE;
Dirk Soltau, Düsseldorf, DE;
Michael Hansen, Cologne, DE;
Thomas Gross, Wermelskirchen, DE;
Dagmar Ulbrich, Monheim, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The invention relates to a lightweight sound insulating lining () for a body component of a motor vehicle, in particular in the form of a lightweight front wall lining, comprising a sound absorbing layer, a sound insulating layer which is directly connected to the sound absorbing layer and substantially air tight, as well as an adjoining foam layer (), wherein the sound absorbing layer () is made of a porous absorber, preferably a fiber fleece or a foam, which has an air permeability in the range of 150 to 2000 liters/ms at a test pressure of 100 Pa. The sound insulating layer () is formed by an integral skin layer of the foam layer () with a thickness of at least 0.5 mm, and is integrally joined to the porous absorber by back-foaming the porous absorber substantially without foam penetration therethrough. Furthermore, a method for manufacturing such a lining is disclosed.