Process for producing paddings molded from polyurethane foam com

Details Process for producing paddings molded from polyurethane foam com Process for producing paddings molded from polyurethane foam com

1988-09-27

1990-05-08

Silbaugh, Jan H.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 451, 264 464, 264 465, 264 466, 4283166, A47C 700, B29C 6722

Patent

active

049237462

ABSTRACT:
A process for producing paddings molded from polyurethane foam including several regions of different pliability, as well as the paddings thus produced. The process includes dividing a mold (1) into compartments and positioning therein one or several collecting vessels (2) and/or one or several partitions (3) of expanded polystyrene, simultaneously pouring different foaming mixtures of polyurethane of different pliability each into one of the volumes delimited by the walls of the partitions (3) and of the mold (1) and/or by the walls of the collecting vessels (2), covering the mold (1), subjecting the mold (1) filled with polyurethane foams to a temperature provided by an exterior heat source and/or by the exothermic reaction of the molds, so as to obtain not only polymerization of the polyurethane molds, but also contraction of the expanded polystyrene, this contraction at the temperature (T) causing transformation of the said expanded polystyrene into a layer (6) of fine, compact and pliable material serving to interconnect the polyurethane foams of different pliability which were simultaneously poured.

REFERENCES:
patent: 3141595 (1964-07-01), Edwards
patent: 3257149 (1966-06-01), Fruchte et al.
patent: 3393258 (1968-07-01), Fultz et al.
patent: 3863908 (1975-02-01), Charpentier
patent: 3918863 (1975-11-01), Rhodes
patent: 4246213 (1981-01-01), Takmatsu et al.

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