B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 3/24 (2006.01) B32B 27/18 (2006.01) B32B 27/20 (2006.01) B65D 65/16 (2006.01)
Patent
CA 2118723
2118723 9304860 PCTABS00020 An opaque, biaxially oriented multi-layer polymeric film structure of reduced surface coefficient of friction. The film structure includes: (a) a thermoplastic polymer matrix core layer having a first surface and a second surface, within which is located a strata of voids; positioned at least substantially within a substantial number of the voids is at least one spherical void-initiating particle which is phase distinct and incompatible with the matrix material, the void space occupied by the particle being substantially less than the volume of the void; the population of the voids in the core being such as to cause a significant degree of opacity; (b) at least one thermoplastic polymer intermediate layer having a first surface and a second surface, the second surface of the intermediate layer adhering to at least the first surface of the core layer, the intermediate layer formed from a mixture comprising the thermoplastic polymer, a migratory slip agent and a migratory antistatic agent; and (c) a non-voided thermoplastic skin layer adhering to the first surface of the intermediate layer; wherein the slip agent and the antistatic agent migrate to the outer surface of the skin layer and are effective to reduce the surface coefficient of friction thereof.
Frognet Jean-Pierre
Keller Lajos Edward
Petitjean Maurice
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
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