| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a widely realizable recycle system for reclaiming processing of wastes of simple PVC substances and (PVC material) laminate composites of paper, aluminum and NWF, comprising a safe aqueous system as a solvent saturation treating method, using little toxic, little inflammable and durable composition, and handling with safety and low pollution, by a simple technique and a general-purpose method. <P>SOLUTION: The reclaiming method established of PVC materials, that is, an ecorecycle system of PVC materials, comprises a system of (1) saturating PVC materials with such a PVC material treating composition consisting of the chief agent of N-methyl-2-pyrrolidone, dimethyl imidazolidinone and morpholine and of the auxiliary material of terpene-based hydrocarbon as is a blend of 50-90% by weight of the chief agent and 10-40% by weight of the auxiliary material to thereby dissolve PVC completely, (2) recovering PVC solid by adding 7-40% by weight of an aqueous medium of water or a lower (1-4C) monohydric alcohol and thereafter by reclaiming PVC solid, and (3) again dehydrating the treating residual liquid and recycling it as PVC material treating composition. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
