Expandable resin composition
AssigneeMattel, Inc.
InventorFleet E. Nuttall
Life of this patent
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Abstract
An expandable resin composition for puff molding shaped parts is disclosed. The composition includes a thermoplastic olefin resin such as ethylene-vinyl acetate (EVA), a solid thermally activatable blowing agent, a solid thermally activatable cross-linking agent and an inorganic metal salt such as zinc borate which provides a finished part with high temperature strength enabling removal of the shaped part from a hot mold without tearing the skin.
Claims15
An expandable resin composition comprising a thermoplastic 1-olefin polymer containing an intimate dispersion of a solid thermally activated organic blowing agent, a solid thermally activatable organic cross-linking agent and a metal borate salt in an amount effective to reduce skin tearing on removal of an expanded part from a hot mold.
Dependencies are inferred from the claim text.