B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 17/00 (2006.01) B02C 18/00 (2006.01) B29B 7/42 (2006.01) B29B 7/82 (2006.01) B29B 17/02 (2006.01) B29C 47/14 (2006.01) B29C 47/62 (2006.01)
Patent
CA 2053173
A method of processing scrap, single-ply synthetic plastic roof-membrane sheet material having a fabric, with warp and weft strands composed of bundles of synthetic plastic fibers, encased in a polyvinyl chloride 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 without substantially reducing the lengths of the strands and strands are then disembodied via said shear forces without substantially reducing the lengths of the fibers to provide separated strand fibers in the mix of material. Finally, the fibers are randomly dispersed in the mix material and extruded.
Grussing David R.
Hermanson Harry
Hultz Robert C.
Deeth Williams Wall Llp
Duro-Last Inc.
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