Method of producing open-cell foamed articles of cross-linked po

Details Method of producing open-cell foamed articles of cross-linked po Method of producing open-cell foamed articles of cross-linked po

1982-03-12

1984-03-06

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264321, 264DIG5, 264DIG13, 264DIG18, B29D 2700

Patent

active

044353464

ABSTRACT:
An open-cell foamed article of a cross-linked polyolefin having a high open-cell ratio and a high degree of expansion is produced by a method which comprises the steps of preparing a foamable and cross-linkable polyolefin composition, forming the composition into a desired shape maintaining its gel percent at zero, decomposing the cross-linking agent and blowing agent concurrently by heating the composition under atmospheric pressure in such conditions that the peak of the ratio of the degree of cross-linking to the degree of decomposition of the blowing agent is not more than 20 and exerting a mechanical deformation to the resulting polyolefin foam to rupture the cell membranes.

REFERENCES:
patent: 3394214 (1968-07-01), Benning

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