Continuous manufacturing method and manufacturing apparatus of thermoplastic polyester resin foam
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United States of America Patent
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Mar 25, 2003
Issued Date -
N/A
app pub date -
Feb 22, 1999
filing date -
Dec 27, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A thermoplastic polyester resin is fed into a twin extruder, wherein a resin is heated for melting, thereby removing moisture in the resin by evacuating and sucking from a vent port thereof, injecting a foaming agent into the resin to which is pushed out as a foaming sheet and, after that, forming the foaming sheet which is divided into a forming body and a trimming loss, whereby the trimming loss is crushed to obtain crushed materials which are provided so as to put the materials into the twin extruder as collection materials and recycle them.
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