A process for recycling expanded particle moldings

Details A process for recycling expanded particle moldings A process for recycling expanded particle moldings

B - Operations, Transporting

29

B

B29B 17/02 (2006.01) B29B 13/02 (2006.01) B29B 13/10 (2006.01) C08J 11/06 (2006.01) C08J 11/08 (2006.01) B29C 35/04 (2006.01)

Patent

CA 2115661

The present invention relates to a process for recovering recyclable expanded particles from expanded particle moldings comprising expanded particles of a synthetic resin coated with thermoplastic resin (interfacial material) whose melting point is lower than that of the synthetic resin of the expanded particles or whose solubility is different from that of the synthetic resin of the expanded particles. The process comprises the steps of softening or melting the interfacial material by heating or dissolving it with a solvent, and separating the expanded particle molding into individual particles by applying a shearing force thereto under circumstances such that the bond strength among the expanded particles in the molding is weakened.

La présente invention concerne un procédé pour récupérer les particules expansées recyclables des produits moulés de particules expansées comprenant des particules expansées d'une résine synthétique enduite d'une résine thermoplastique (matière d'interface) dont le point de fusion est inférieur à celui de la résine synthétique des particules expansées ou dont la solubilité est différente de celle de la résine synthétique des particules expansées. Le procédé comprend les étapes de ramollissement ou de fusion de la matière d'interface par chauffage ou sa dissolution dans un solvant, et de séparation du moulage de particules expansées en particules individuelles en appliquant une force de cisaillement dans des conditions telles que la force de liaison entre les particules expansées dans le moulage est affaiblie.

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