Method of microcellular foam molding
OwnerZhenhuan Luo, Fuqi Liuinventors
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Abstract
A method of microcellular foam molding an article is provided with filling a mold with a polyolefin compound; forming crosslinks in the mold to obtain a crosslinked mold; dissolving a supercritical fluid into the crosslinked mold under a predetermined pressure and at a predetermined temperature for a predetermined period of time to obtain a second mold configured to allow the supercritical fluid to effuse through; and heating the second mold at a second predetermine temperature for a predetermined foaming time until a foamed article is finished in the second mold. A second embodiment involves using elastomers as foaming materials is also provided.
Claims7
A method of forming a molded microcellular foam article, comprising the steps of:
- (1) filling a mold with a mixture of a polyolefin compound and a crosslinking, agent;
- (2) crosslinking the polyolefin compound in the mold to form a crosslinked polyolefin compound;
- (3) after the step of crosslinking, introducing a supercritical fluid into the mold and dissolving the supercritical fluid into the crosslinked polyolefin compound in the mold under a predetermined pressure and at a first predetermined temperature for a predetermined period of time to form a crosslinked polyolefin compound having the supercritical fluid dissolved therein in the mold;
- and
- (4) heating the crosslinked polyolefin compound having the supercritical fluid dissolved therein in the mold at a second predetermined temperature for a predetermined foaming time until a finished microcellular foam article is formed in the mold.
Dependencies are inferred from the claim text.