Abstract: An oriented multi-layer film combination comprising: (a) a core layer of polypropylene homopolymer or copolymer; (b) a metallizable skin layer comprising a member having a wetting tension of at least 36 dynes/cm selected from the group consisting of ethylene-vinyl alcohol copolymer (EVOH), poly(vinyl alcohol) (PVOH), and polyester, adjacent one surface of said core layer, said layer being metallized to a metal thickness no greater than 5 nm; and (c) adhesion promoting amounts of an adhesive selected from the group consisting of maleic acid anhydride, modified polypropylene homopolymer or copolymer, high density polyethylene, and ethylene-vinyl acetate (EVA) copolymer, disposed between (a) and (b).

Abstract: A product capable of absorbing unwanted odors and unpleasant flavors, is sealed from said odors and flavors by being sealingly overwrapped with a film comprising an oriented film of a blend of polypropylene and a polymerized polyterpene selected from the group consisting of polymerized d-limonene, polymerized beta-pinene, polymerized synthetic approximation of d-limonene and beta-pinene and mixtures thereof.

Abstract: A metallized multilayer film made from a polymer substrate, preferably polypropylene, is modified by a maleic anhydride modified propylene polymer which can be located on a surface of the substrate or incorporated within the substrate has a skin layer of polyvinyl alcohol which is capable of being metallized.

Abstract: A multilayer film structure includes:(A) a core layer of high density polyethylene including either a minor proportion of a maleic anhydride modified high density polyethylene blended therein or having(B) a skin layer of maleic anhydride modified polyethylene on one side and(C) on the other side a heat sealable or printable skin layer;this structure having an unbalanced orientation such that the degree of transverse direction orientation produces a visible rippled and striated appearance, with the ripples and striations being parallel to the transverse direction of orientation. This structure can also have a layer of ethylene vinyl alcohol copolymer on the maleic anhydride modified polyethylene-containing layer. The maleic anhydride modified HDPE or the EVOH can be metallized and the final structure laminated to a separate film structure.

Abstract: An oriented, multi-layer polymer film laminate having a core of isotactic polypropylene, an outside skin layer of isotactic polypropylene containing an anti-blocking agent and an inside heat sealable skin layer containing an anti-blocking agent and a coefficient of friction-reducing amount of a silicone oil.

Abstract: An oriented, heat-sealable polypropylene film is provided which possesses a low coefficient of friction, excellent anti-static behavior and good optical clarity.

Abstract: Multi-layer structures, such as films of low coefficient of friction also having antistick characteristics over a wide temperature range during heat-sealing are disclosed. In accordance with a preferred embodiment, the films comprise an amide-containing polypropylene base layer and two heat sealable skin layers of a low stereoregularity polyolefin and microcrystalline wax. Methods for forming such structures are also disclosed.

Abstract: A surface-activated polyolefin is coated by applying a solution in an organic solvent of a vinylidene copolymer material containing from 35 to 60 wt.% of vinylidene chloride, from 30 to 50 wt.% of alkyl ester of acrylic or methacrylic acid, from 1 to 10 wt.% of acrylic and/or methacrylic acids and from 1 to 10 wt.% of hydroxyalkyl ester of acrylic or methacrylic acid, a ratio of from 0.5:1 to 5:1 being maintained in the material between the number of carboxyl groups and the number of hydroxyl groups and said solution containing a latent catalyst for the cross-linking of said material, and heat-treating at 70.degree.-130.degree. C. said coated film to provoke said cross-linking.The coating shows an excellent adhesion to the film and improves the thermal weldability, impermeability and flexibility of the latter.