Pellet-type foams of non-crosslinked polypropylene resin having lower melting point and process and device for producing the same and molded foams therefrom
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United States of America Patent
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Oct 10, 2006
Grant Date -
Dec 9, 2004
app pub date -
May 15, 2002
filing date -
May 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a pellet-type non-crosslinked polypropylene foam having a melting point of 125 to 140.degree. C., and a process and device for producing said foam. Since the pellet-type foams of non-crosslinked polypropylene of the present invention has a lower melting point and a closed cell content of 80% or more, it is advantageous to mold such foams. The present invention also relates to an article molded from the above pellet-type non-crosslinked polypropylene foams.
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