Shaped plastic foam part having portions of different density
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United States of America Patent
Stats
-
Mar 23, 1999
Issued Date -
N/A
app pub date -
Jun 12, 1997
filing date -
Nov 29, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A three-dimensional shaped part comprises at least one first portion having an equal density throughout the volume thereof and comprising a plastic foam of a primary material having a cellular structure and plastic foam granules interconnected by the cellular structure of the plastic foam, and at least one second portion having an equal density throughout the volume thereof, the second portion being adjacent the first portion and comprising a plastic foam of a primary material having a cellular structure and elastically precompressed plastic foam granules interconnected by the cellular structure of the plastic foam. 70% to 90% of the volume of the shaped part is formed by the plastic foam granules, and the density of the second portion is greater than the density of the first portion.
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Cited Art Landscape
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