Process for producing foamed body of thermoplastic resin,...

Details Process for producing foamed body of thermoplastic resin,... Process for producing foamed body of thermoplastic resin,...

2007-03-27

2007-03-27

Vo, Hai (Department: 1771)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S318600, C428S310500, C428S319300, C428S319700

Reexamination Certificate

active

10069717

ABSTRACT:
The invention provides a foamed body of thermoplastic resin having a high expansion ratio, desired shape and cells of desired diameter, especially fine cells. The foamed body of thermoplastic resin is produced by filling the thermoplastic resin containing a foaming agent into a cavity31of a mold2aand thereafter enlarging the cavity31to expand the resin. In this process, the cavity31is completely filled with the resin as melted and containing the foaming agent, then held in its shape as filled with the resin and enlarged to an increased final cavity width upon the average temperature filled in the cavity31reaching the range from the melting point of the resin to the melting point plus 30° C.

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International Search Report PCT/JP00/05776.

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