B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/523
B29C 49/20 (2006.01) B29C 47/00 (2006.01) B29C 47/30 (2006.01) B29C 65/00 (2006.01)
Patent
CA 1216718
METHOD AND APPARATUS FOR THE PRODUCTION OF A HIGH-STRENGTH, TEAR-RESISTANT POLYMER COMPOSITE Abstract A method and an apparatus for the production of a composite plastic material consisting of oriented polymer filaments and a polymer film web, and more particularly, the production of a composite material which possesses an improved physical strength and higher tear resistance in comparison with plastic film materials which are not reinforced. An extrusion die is used for example, a conventional tubular extrusion die for extruding a continuous blown tubular plastic film web and wherein the die orifice is encompassed by spinerette apertures through which there are concurrently extruded a plurality of polymer filaments which are oriented and initially conveyed along a path substantially parallel to but not in adherence with the blown tubular plastic film web. Upon a further separation of the filaments and the tubular film, the filaments may be at least partially coated with a suitable adhesive material and, thereafter, adhesively bonded or laminated to the surface of the film web in order to produce composite material constituted of filaments and film.
439690
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
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