Sound-absorbent foam moldings

Details Sound-absorbent foam moldings Sound-absorbent foam moldings

1999-04-22

2000-05-09

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 454, 521142, 521146, C08J 918

Patent

active

060605294

ABSTRACT:
The invention relates to sound-absorbent foam moldings which have a sound-absorption level according to DIN 52215 of from 30 to 95% in the frequency range from 0.5 to 4 kHz. The foam is an incompletely fused molded polyolefin or polystyrene foam with from 10 to 40% interstitial volume.

REFERENCES:
patent: 4014770 (1977-03-01), Suzuki et al.
patent: 4111862 (1978-09-01), Geschwender

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