Compositions and process for rotational molding articles

Details Compositions and process for rotational molding articles Compositions and process for rotational molding articles

1998-05-04

1998-11-03

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 453, 264 455, 264126, 264310, 521 51, 521134, B29C 504, B29C 512, B29D 2700

Patent

active

058303928

ABSTRACT:
Improved compositions useful for the production of foamed rotomolded articles are provided. The compositions of the invention are comprised of a first thermoplastic resin component which is an ethylene polymer in pellet form containing a foaming agent and a second thermoplastic resin component which is a powder consisting of a mixture of different particle size and melt index ethylene polymers. An improved process for producing foamed rotomolded articles having uniformly foamed interiors and smooth exterior skins which are substantially free of surface defects is also provided.

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patent: 4533696 (1985-08-01), Schrijver et al.
patent: 4952350 (1990-08-01), Duffy

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