Patent ID: 7943676
Filing Date: 2011-05-17
Classification: B29B,B29C,B29K,C08G,C08J,Y02P,Y02W

Abstract:
1. A method of recycling waste plastic foam materials, comprising the steps of: smashing a waste material including a polyurethane foam and non-polyurethane material into fine particles so as to obtain a first starting material; crisping said first starting material; milling the so-crisped material into powder so as to obtain a second starting material; mixing said second starting material with a first foaming reaction solution including polyol, catalyst and additives so as to obtain a semi-treated foaming material; mixing said semi-treated foaming material with a second foaming reaction solution including diisocyanate so as to obtain a completed-treated foaming material, wherein said second foaming reaction solution has a quantity less than that of said first foaming reaction solution; pouring said completed-treated foaming material into a mold in the form of a cylindrical tank including a center pipe with a plurality of apertures disposed in a wall thereof; and introducing water vapor in a sub-saturated state uniformly into said mold through the plurality of apertures in the wall of the center pipe so that said sub-saturated water vapor spouts outwardly from the apertures of the center pipe into the interior of the mold so as to induce said completed treated foaming material to produce a foaming reaction.