Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1990-10-15
1992-09-08
Simmons, David A.
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264140, 264DIG69, 425208, B29B 1700
Patent
active
051456176
ABSTRACT:
A method of processing scrap, single-ply synthetic plastic roof-membrane sheet material comprising a fabric, having warp and weft strands composed of bundles of synthetic plastic fibers, encased in a thermoplastic synthetic plastic envelope. Comminuted pieces of the scrap are stuffed into a heat-applying, continuous mixer-extruder having screw mechanism within an elongate barrel chamber and the compressed material then is heated to plasticizing temperature and subjected to repetitive shear forces as it moves along the barrel chamber to a die discharge. The warp strands are separated from the weft strands via said shear force application and disembodied via said shear forces to provide discrete fibers in the mix of material. Finally, the fibers are randomly dispersed in the mix material and extruded.
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Grussing David R.
Hermanson Harry
Hultz Robert C.
Duro-Last, Inc.
Matney, Jr. William J.
Simmons David A.
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