Method for the preparation of foamed and crosslinked rubber

Details Method for the preparation of foamed and crosslinked rubber Method for the preparation of foamed and crosslinked rubber

2010-02-11

2011-11-01

Gupta, Yogendra (Department: 1744)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

C264S051000, C264S052000

Reexamination Certificate

active

08048349

ABSTRACT:
The method of the present invention is adapted to foam and crosslink a raw material including a rubber, a crosslinking agent and a foaming agent. The method includes the following steps: (1) a first crosslinking and foaming step, placing the raw material into a first mold, crosslinking and foaming the raw material to form a pre-molded body; (2) a second crosslinking and foaming step, withdrawing the pre-molded body from the first mold, placing the pre-molded body into a second mold after the pre-molded body being cooled down, crosslinking and foaming the pre-molded body to form a molded body; and (3) a third crosslinking and foaming step, withdrawing the molded body from the second mold, placing the molded body into a heating device after the molded body being cooled down, crosslinking and foaming the molded body to form a product.

REFERENCES:
patent: 4671910 (1987-06-01), Fuhrmann
Britannica Online Encyclopedia; http://www.britannica.com/EBchecked/topic/692466/ethylene-propylene-copolymer.

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