Expanded cross-linked polyethylene particle, a molded...

Details Expanded cross-linked polyethylene particle, a molded... Expanded cross-linked polyethylene particle, a molded...

C - Chemistry, Metallurgy

08

J

18/639, 403/79,

C08J 9/16 (2006.01) B29C 67/20 (2006.01) C08J 9/18 (2006.01) C08J 9/228 (2006.01) C08L 23/06 (2006.01)

Patent

CA 1147100

Abstract An expansion-molded product made from expanded cross-linked polyethylene particles each of which has an outer skin and inner cellular core, said outer skin each being fused and welded together to form an interfacial membrane whose average thickness is as thick as at least three times that of a cell membrane of the inner cellular core, is prepared by charging a lot of the particles into a mold, heating the particles therein to such an extent that the apace among the particles is filled and then aging thus obtained molded product. The expanded particle each has a structure having am outer skin on an inner cellular core, the outer skin being as thick as at least three times cell membrane of the inner cellular core. The expandable particles are prepared by impregnating a foaming agent into the cross-linked poly- ethylene particles and heating so that the expandable par- ticles are subjected to a step in which the foaming agent existing in the surface thereof is preferentially forced to evaporate.

366174

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