Abstract Waste plastics comprising a mixture of two or more thermoplastic materials are treated by grinding the products to form a particulate thermoplastic mixture, washing the particulate mixture to remove non-plastic materials, placing the thermoplastic mixture in a mold or shaped vessel, and heating the mixture to a temperature above the softening point of the lower melting thermoplastics and below the temperature of the softening point of the highest melting thermo-plastic of the mixture. In another embodiment, particulate thermo-plastic is used as a filler for asphalt compositions. In a further embodiment, waste thermoplastics are mixed with combustible cellulosic materials and formed into logs and the like which thermoplastic mixture has been treated to remove halogen containing thermoplastic such as polyvinyl chloride.
A METHOD OF DISPOSING OF MIXED WASTE THERMOPLASTIC MATERIALS COMPRISING HALOGEN CONTAINING PLASTICS AND NONHALOGEN CONTAINING PLASTICS COMPRISING THE STEPS: A. GRINDING THE MATERIALS TO FORM A PARTICULATE THERMOPLASTIC MIXTURE; B. SEPARATING LOW AND HIGH DENSITY PLASTICS BY FLOATING THE MIXTURE THROUGH A LIQUID HOLDING CHAMBER CONTAINING A LIQUID HAVING A DENSITY OF LESS THAN THE DENSITY OF HALOGEN CONTAINING PLASTICS; C. RECOVERING THE FLOATING PARTICLES; D. MIXING THE RECOVERED PARTICLES WITH A SLURRY OF CELLULOSIC MATERIAL; AND E. COMPRESSING THE MIXTURE OF STEP (D) TO FORM A COMBUSTIBLE PRODUCT.
Claim 2
Independent Claim
90 words
A METHOD OF DISPOSING OF MIXED WASTE THERMOPLASTIC MATERIALS COMPRISING HALOGEN CONTAINING PLASTICS AND NONHALOGEN CONTAINING PLASTICS COMPRISING THE STEPS: A. GRINDING THE MATERIALS TO FORM A PARTICULATE THERMOPLASTIC MIXTURE; B. SEPARATING LOW AND HIGH DENSITY PLASTICS BY FLOATING THE MIXTURE THROUGH A LIQUID HOLDING CHAMBER CONTAINING A LIQUID HAVING A DENSITY OF LESS THAN THE DENSITY OF HALOGEN CONTAINING PLASTICS; C. RECOVERING THE FLOATING PARTICLES; D. MIXING THE RECOVERED PARTICLES WITH A SLURRY OF CELLULOSIC MATERIAL; AND E. COMPRESSING THE MIXTURE OF STEP (D) TO FORM A COMBUSTIBLE PRODUCT.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the mixture comprises polyethylene and polyvinyl chloride plastics.