Method for manufacturing low density rubber foamed body

Details Method for manufacturing low density rubber foamed body Method for manufacturing low density rubber foamed body

1983-08-22

1986-06-24

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 55, 264DIG5, 264DIG18, 521140, B29C 6722, C08J 324, C08J 906

Patent

active

045966842

ABSTRACT:
A method for manufacturing a low density rubber foamed body is provided which comprises the steps of forming a sheet from a mixture of 100 parts by weight of natural rubber or a synthetic rubber, 10 to 80 parts by weight of a foaming agent, and 0.5 to 15% by weight of a crosslinking agent; enclosing said sheet within a mold and heating said mold under pressure from the exterior to thereby foam said sheet; forcibly cooling said mold; and releasing a foamed body from said mold. When 10 to 60 parts by weight of a thermoplastic synthetic resin are further added to the mixture, a rubber foamed body of still lower density and lower shrinking property is obtained.

REFERENCES:
patent: 2713699 (1955-07-01), Pooley
patent: 2763897 (1956-09-01), Gates et al.
patent: 2873481 (1959-02-01), Semegen
patent: 3240727 (1966-03-01), Scalari et al.
patent: 3341480 (1967-09-01), Feild
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 4338271 (1982-07-01), Kumasaka et al.

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