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PROCEDURE FOR OBTAINING RESIN FOAMS. (MACHINE-TRANSLATION BY GOOGLE TRANSLATE, NOT LEGALLY BINDING)
ES2384353
The present invention is a process for obtaining molded polyurethane foams comprising the combined injection into the mold of a first layer of polyol-isocyanate mixture and a subsequent layer of a second layer of polyol-isocyanate mixture equal to or different from the previous one, followed by the curing of the piece. The procedure is carried out by succession of techniques of injection by casting and spray or injection at low pressure. The product obtained is applicable in the manufacture of molded mattresses, pillows, upholstery and relax pieces. (Machine-translation by Google Translate, not legally binding)
The present invention solves disadvantages of the state of the art by eliminating the use of adhesives and achieving an intimate union between the two injected foams, obtaining parts that maintain the arrangement of both by achieving a perfect chemical and physical union between them.