C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/06 (2006.01) B29C 45/00 (2006.01) B29D 23/20 (2006.01) B65D 35/08 (2006.01) C08L 23/12 (2006.01) C08L 23/16 (2006.01)
Patent
CA 2442266
Compositions for injection-molding of long, thin-walled, one-piece squeeze tubes include low-density polyethylene having a density less than about 0.925 g/cc and a melt index of at least about 50 g/10 minutes, and polypropylene having a high melt index greater than about 800 g/10 minutes, wherein the high melt index is attained by peroxide degradation of the polypropylene during melt processing. The compositions can also include a polymer that is miscible and compatible with low-density polyethylene and polypropylene for enhancing flow of the molding composition in the mold, the polymer having a glass transition temperature Tg of about -20 to -40°C, and/or a metallocene resin having a density less than about 0.915 g/cc.
Morin Jeremy
Stevens James
Williams Alan D.
Sim & Mcburney
Sonoco Development Inc.
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