Microcellular closed cell foams and their method of manufacture

Details Microcellular closed cell foams and their method of manufacture Microcellular closed cell foams and their method of manufacture

1982-07-30

1984-09-25

Anderson, Philip E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 50, 264176R, 264237, 264DIG5, 264DIG13, 264DIG83, 521146, 521180, 521182, B29D 2700

Patent

active

044736657

ABSTRACT:
Microcellular foam materials having void fractions of about 5 to 30 percent and uniform void sizes on the order of 2 to 25 microns are produced by pre-saturating the material to be processed with a uniform concentration of a gas while controlling temperature and pressure to avoid cell nucleation. Processing is also done under pressure to avoid nucleation. After processing, pressure is released and cell nucleation occurs at or near the glass transition temperature of the material; it is then cooled quickly to preserve the microcellular structure.

REFERENCES:
patent: 2531665 (1950-11-01), Booth
patent: 2590156 (1952-03-01), Carpentier
patent: 2751627 (1956-06-01), Lindemann
patent: 2783894 (1957-03-01), Lovell et al.
patent: 3121760 (1964-02-01), Kline
patent: 3436445 (1969-04-01), Brunner et al.
patent: 3491032 (1970-01-01), Skochdopole et al.
patent: 3544384 (1970-12-01), Sundberg et al.
patent: 3551362 (1970-12-01), Decker
patent: 3558764 (1971-01-01), Isaacson et al.
patent: 3647329 (1972-03-01), Reifenhauser et al.
patent: 3745057 (1973-07-01), Loft et al.
patent: 3796779 (1974-03-01), Greenberg
patent: 3806291 (1974-04-01), Hendry
patent: 3822331 (1974-07-01), Cogliano
patent: 3871897 (1975-03-01), Ealding
patent: 3922328 (1975-11-01), Johnson
patent: 3962387 (1976-06-01), Hendry
patent: 3988404 (1976-10-01), Orimo et al.
patent: 4096218 (1978-06-01), Yasuike et al.
patent: 4229395 (1980-10-01), Nagumo et al.
patent: 4284596 (1981-08-01), Inokuchi et al.
patent: 4352893 (1982-10-01), Johnson et al.
patent: 4360484 (1982-11-01), Rubens
Martini, Jane Ellen, The Production and Analysis of Microcellular Foam, Master's Thesis-Mechanical Engineering, Massachusetts Institute of Technology, Aug. 1981, 153 pp.
Waldman, Francis Abbott, The Processing of Microcellular Foam, Master's Thesis-Mechanical Engineering, Massachusetts Institute of Technology, 1982, 139 pp.
Lacallade, Roger G., "Additives for Plastics-Chemical Blowing Agents for SF", in Plastics Engineering, Jun. 1976, pp. 40-42.
"The Encyclopedia of Patent Practice and Invention Management", Robert Calvert, Edt., New York, Reinhold, .COPYRGT.1964, pp. 42 and 46.

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