Process for manufacturing an olefin resin foam

Details Process for manufacturing an olefin resin foam Process for manufacturing an olefin resin foam

C - Chemistry, Metallurgy

08

L

403/64

C08L 57/00 (2006.01) C08J 9/14 (2006.01)

Patent

CA 1111600

ABSTRACT Process for manufacturing a polyolefin resin foam by adding to and mixing with a base polyolefin resin a cell control agent and a volatile blowing agent and extrusion- -expanding the resultant mixture, wherein the cell control agent comprises amorphous silica of pH 3.5 ~ 4.5 in the form of a nonporous microspheres with an average particle size of 5 ~ 100mµ and is added in an amount of 0.1 ~ 5 percent by weight of the base polyolefin resin. Employing this process the average cell size of the resulting foam does not vary significantly even though the blowing agent content is varied.

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