Method for the direct backfoaming of absorber systems
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United States of America Patent
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Issued Date -
Jun 29, 2006
app pub date -
Oct 31, 2003
filing date -
Nov 5, 2002
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method for producing mass absorber systems, sound insulations having a great thermostable, noise-reducing effect, especially for the engine compartment of motor vehicles. Disclosed is a method for the direct backfoaming of absorber systems, the absorber of which comprises a foam layer (2) or fleece layer (4) with a one-sided or double-sided covering layer (3). Said method is characterized by the fact that the mass side of an absorber having a very low density is provided with a foam-impermeable covering layer (3), the absorber is placed in the foaming tool, and a certain pressure is generated in the absorber via the side located opposite the mass inside the closed foaming tool before the foaming process is triggered.
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