Method of producing porous rubber sheeting

Details Method of producing porous rubber sheeting Method of producing porous rubber sheeting

1977-06-20

1979-05-01

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264145, 264154, 264156, 264DIG6, 264DIG47, 264DIG53, B29H 306, B29H 900, B29C 1704, B29B 2700

Patent

active

041523849

ABSTRACT:
This invention provides a method for producing porous elastomeric sheet material, wherein ungelled elastomer liquid material is admixed with hollow spherical filler particles and then spread to form a sheet, which is then dried and gelled. The dried and gelled sheet of filled elastomer is subjected to rigorous biaxial stretching, wherein the elastomeric material surrounding at least some of the particles is stretched and ultimately broken by the rigorous stretching, to form a porous sheet material.

REFERENCES:
patent: 2949639 (1960-08-01), Woodward
patent: 3046172 (1962-07-01), Reid
patent: 3243845 (1966-04-01), Cassel
patent: 3302501 (1967-02-01), Greene
patent: 3340235 (1967-09-01), Holt
patent: 3682760 (1972-08-01), Fairbanks
patent: 3775521 (1973-11-01), Yamamoto et al.
patent: 3903234 (1975-09-01), Ikeda et al.
patent: 3963813 (1976-06-01), Keith

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