Method of fabricating a cushion assembly

A - Human Necessities – 47 – C

Patent

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Details

A47C 7/02 (2006.01) A47C 27/15 (2006.01) B29C 44/56 (2006.01) B29C 63/02 (2006.01) C09J 5/06 (2006.01) C09J 7/00 (2006.01)

Patent

CA 2265701

A foam-fabric laminate (14, 15) and an air impervious adhesive film (16) are placed over a mold (18); the adhesive is drawn against the foam and the fabric urged against the mold by vacuum. A foam pad (12) is placed adjacent to the adhesive film, the film heated and diffused into the foam of the pad and the laminate and allowed to cure. The foam layer of the laminate is formed as the reaction product of a polyether polyol or a graft polyether polyol with about 30 to 60 parts by weight of an MDI or polymeric MDI/TDI blended isocyanate or mixtures thereof, about 1.5 to 3.0 parts by weight water as a blowing agent, about 0.05 to about 0.90 parts by weight amine catalyst and about 0.5 to about 1.5 parts by weight silicone surfactant, wherein all amounts are based on 100 parts by weight polyol.

Un stratifié mousse/toile (14, 15) et un film adhésif imperméable à l'air (16) sont placés dans un moule (18) puis l'adhésif est attiré contre la mousse et la toile poussée vers le moule sous l'effet d'une dépression. Un coussin de mousse (12) est placé contre le film adhésif, puis le film, chauffé et diffusé dans la mousse du coussin et dans le stratifié, durcit. La couche de mousse du stratifié est le produit de réaction d'un polyol de polyéther ou d'un polyol de polyéther greffé avec environ de 30 à 60 parties en poids de MDI ou d'un polymère d'isocyanate mélangé à du MDI/TDI ou leurs mélanges, avec environ 1,5 à 3,0 parties en poids d'eau servant d'agent de soufflage, environ 0,05 à 0,90 parties en poids d'une amine servant de catalyseur, et environ 0,5 à 1,5 parties en poids d'un tensio-actif au silicium, toutes les quantités étant basées sur 100 parties en poids de polyol.

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