Recycled plastic composite composition

Abstract

A composition for a recycled plastic composite composition, and a method of making the composite composition, is provided. The composite composition includes recycled EVA from 30% to 80% and a stone powder from 20% to 70%; percentages by weight

What is claimed is: 
     
         1 . A recycled plastic composite composition, comprising:
 about 30% to 80% by weight based on total weight of the composition of a recycled plastic; and   about 20% to 70% by weight based on total weight of the composition of a calcium carbonate containing material.   
     
     
         2 . The composition of  claim 1  wherein:
 the recycled plastic is present in an amount greater than 70% and less than or equal to 80% by weight based on total weight of the composition; and 
 the calcium carbonate containing material is present in an amount greater than 20% and less than or equal to 30% by weight based on total weight of the composition. 
 
     
     
         3 . The composition of  claim 1  wherein:
 the recycled plastic is present in an amount greater than 60% and less than or equal to 70% by weight based on total weight of the composition; and 
 the calcium carbonate containing; material is present in an amount greater than 30% and less than or equal to 40% by weight based on total weight of the composition. 
 
     
     
         4 . The composition of  claim 1  wherein:
 the recycled plastic, is present in an amount greater than 50% and less than or equal to 60% by weight based on total weight of the composition; and 
 the calcium carbonate containing material is present in an amount greater than 40% and less than or equal to 50% by weight based on total weight of the composition. 
 
     
     
         5 . The composition of  claim 1  wherein:
 the recycled plastic is present in an amount greater than 40% and less than or equal to 50% by weight based on total weight of the composition; and 
 the calcium carbonate containing material is present in an amount greater than 50% and less than or equal to 60% weight based on total weight of the composition. 
 
     
     
         6 . The composition of  claim 1  wherein:
 the recycled plastic is present in an amount greater than 30% and less than or equal to 40% by weight based on total weight of the composition; and 
 the calcium carbonate containing material is present in an amount greater than 60% and less than or equal to 70% by weight based on total weight of the composition. 
 
     
     
         7 . The composition of  claim 1  wherein the composition further comprises talc. 
     
     
         8 . The composition of  claim 1  wherein the recycled plastic comprises recycled ethylene-vinyl acetate copolymer. 
     
     
         9 . The composition of Claim I wherein the recycled plastic comprises at least one material selected from the group consisting of recycled ethylene-vinyl acetate copolymer, recycled chlorinated polypropylene, recycled polyvinyl chloride, and recycled polyethylene. 
     
     
         10 . A method of preparing a recycled plastic composite composition, comprising:
 obtaining 30% to 80% by weight based on total weight of the composition of a recycled plastic and 20% to 70% by weight based on total weight of the composition of a calcium carbonate containing material;   melting together the recycled plastic and the calcium carbonate containing material to form a thick composite; and   molding the thick composite to obtain said recycled plastic composite composition.   
     
     
         11 . The method of  claim 10  wherein the step of melting together the recycled plastic and the calcium carbonate containing material to form a thick composite includes the step of:
 heating the recycled plastic and the calcium carbonate containing material to between about 160° C. to 240° C. 
 
     
     
         12 . The method of  claim 10  wherein the calcium carbonate containing material is from 600 mesh to 1200 mesh. 
     
     
         13 . The method of  claim 10  wherein the composition further comprises talc. 
     
     
         14 . The method of  claim 10  wherein the step of melting together components comprises the steps of:
 combining pellets of the recycled plastic and the calcium carbonate containing material to produce a composite mixture; 
 feeding the composite mixture to a screw melting machine with electric heating; 
 heating the composite mixture to produce a thick composite; and 
 conveying the thick composite to an outlet. 
 
     
     
         15 . The method of  claim 14  wherein the step of molding comprises the steps of:
 conveying the thick composite into a mold; and 
 cooling the thick composite. 
 
     
     
         16 . The method of  claim 15  wherein the step of cooling the thick composite comprises the steps of:
 circulating cooling water to de-mold the thick composite, 
 demolding the thick composite; and 
 immersing the thick composite in water to be cooled completely. 
 
     
     
         17 . A recycled plastic composite article comprising:
 a recycled plastic composite composition, comprising:   about 30% to 80% by weight based on total weight of the composition of a recycled plastic; and   about 20% to 70% by weight based on total weight of the composition of a calcium carbonate containing material.   
     
     
         18 . The recycled plastic composite device of  claim 17  wherein the article is a flowerpot. 
     
     
         19 . A method of making a recycled plastic composite article comprising the steps of:
 obtaining pellets of a recycled plastic and a calcium carbonate containing material;   mixing pellets of a recycled plastic and a calcium carbonate containing material to create a composite mixture   feeding the composite mixture to a screw melting machine;   melting together the recycled plastic and the calcium carbonate containing material to form a thick composite;   conveying the thick composite to a mold of a hydraulic press having a mold;   applying pressure to the mold;   allowing the thick composite to cool; and   de-molding the thick composite.   
     
     
         20 . The method of  claim 19  wherein the step of obtaining pellets of a recycled plastic and a calcium carbonate containing material comprises the step of:
 obtaining 30% to 80% by weight based on total weight of the composition of a recycled plastic and 20% to 70% by weight based on total weight of the composition of a calcium carbonate containing material; 
 
     
     
         21 . The method of  claim 19  wherein the step of allowing the thick composite to cool includes the steps of:
 circulating cooling water about the mold; and 
 after de-molding the thick composite, immersing the thick composite in water.