Waste pipe system comprising plastic pipe parts made of thermoplastic material with sound-proofing properties
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United States of America Patent
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Sep 18, 1990
Issued Date -
N/A
app pub date -
Dec 9, 1988
filing date -
Jul 23, 1986
priority date (Note) -
Expired
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Abstract
A waste pipe system of an injection moulded or extruded pipe part of thermoplastic material with soundproofing properties having a weight per unit area of at least 8 kg/m.sup.2. The weight per unit area is adjusted by incorporating a filler in the plastic, preferably barium sulphate is used as such a filler. The density of the plastic pipe part is comprised between 1.8 and 2.7, preferably between 1.8 and 2.0 g/cm.sup.3. Suitable thermoplastic materials are PVC, polyolefins and ABS (acrylonitrile-butadiene-styrene) copolymer, particularly PVC or polypropylene. The plastic pipe part may also be a socket or a double sided socket.
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