Forming hollow plastic product partially different in composition and its manufacturing apparatus
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United States of America Patent
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Oct 20, 1992
Issued Date -
N/A
app pub date -
Jun 8, 1990
filing date -
Jun 4, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composite parison generally cylindrical in shape and including two or more plastic materials different in characteristic is formed. Using this composite parison, a hollow plastic product of any desired shape having a locally different characteristic, such as in softness, heat-resistance or wear-resistance, can be manufactured with ease, for example, by conventional blow molding.
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