Recycling polyolefins coated with chlorine-containing polymer

Details Recycling polyolefins coated with chlorine-containing polymer Recycling polyolefins coated with chlorine-containing polymer

1992-11-09

1994-02-15

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

134 84, 264 37, 264140, 264349, 264DIG69, 427336, 427444, 521 46, 425205, B29B 1700

Patent

active

052864243

ABSTRACT:
Recycling polyolefin material, e.g. biaxially oriented polypropylene film, coated with a chlorine-containing polymer, such as polyvinylidene chloride homopolymer and/or copolymer, and having a primer therebetween. First, a caustic solution is formulated containing from about 0.1 wt. % to about 50 wt. % caustic, and from about 0.05 wt. % to about 1.0 wt. % of a wetting agent. The formulated caustic solution is heated to a temperature from about 25.degree. C. to about 140.degree. C. The polyolefin material is soaked in the heated caustic solution until the material is separable from the chlorine-containing polymer. After separating the polyolefin material from the chlorine-containing polymer, the material is reprocessed into desired product by extrusion, molding or other product forming process.

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Polymer Monographs, vol. 5; Polyvinylidene Chloride; Ritchie A. Wessling; Gordon and Breach Science Publishers: 1977; pp. 146-151.

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