Biaxially-oriented polyolefin multi-layer film which can be sealed on both sides, and the preparation and use of the same
AssigneeHoechst Aktiengesellschaft
InventorLothar Bothe
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Abstract
A five layer, biaxially-oriented polyolefin film, which is sealable on both exterior surfaces and includes a base layer of polypropylene which carries polyolefinic intermediate layers on both surfaces, and two sealing layers of sealable olefin polymers which are disposed, respectively, on the intermediate layers. The intermediate layers include 0.2-2.0% by weight of a polydialkylsiloxane having a viscosity of less than about 500 mm2/s. The film is particularly well-suited for the reception of aqueous printing inks or as a substrate for aqueous coating systems.
Claims20
A five layer, biaxially-oriented polyolefin film having two exterior surfaces which can be sealed, comprising a base layer comprised of a propylene polymer and having a first and second surface, first and second polyolefinic intermediate layers disposed on said first and second surfaces, respectively, of said base layer, and first and second sealing layers comprised of a sealable olefin polymer and disposed on said first and second intermediate layers, respectively, wherein said first and second intermediate layers each include about 0.5 to 2.0% by weight of a polydialkylsiloxane which has a viscosity of less than about 500 mm.sup.2 /s.
Dependencies are inferred from the claim text.