Abstract: A packaging film composition having an improved tear strength comprising a core, which is preferably polybutylene homopolymer or copolymer or a blend of polybutylene with another compatible polymer, said core being coated on one or both sides with a polypropylene homopolymer or copolymer optionally blended with a minor amount of a high melt index polybutylene.

Abstract: Film or sheets and a laminar structure fabricated from blends of an ethylene-carboxylic acid copolymer, a butene-1 homopolymer or copolymer, and an ethylene homopolymer or an ethylene unsaturated ester copolymer.

Abstract: Films or sheets are fabricated from blends of an ethylenic homopolymer or copolymer, a butene-1 copolymer, and a propylene homopolymer or copolymer which result in good peel characteristics, and wherein such films or sheets will bond to a polypropylene substrate in a laminar structure by extrusion lamination without the need for an adhesive.

Abstract: A hot melt adhesive and a laminar structure fabricated from a blend comprising a modified or unmodified ethylenic copolymer, a modified or unmodified butene-1 homopolymer or copolymer, a stabilizer and one or more of: a tackifying resin compatible with the major amount of modified polymer, a wax, and atactic polypropylene.

Abstract: A hot melt adhesive and a laminar structure fabricated from a blend comprising a modified or unmodified ethylenic copolymer, a modified or unmodified butene-1 homopolymer or copolymer, a stabilizer and one or more of: a tackifying resin compatible with the major amount of modified polymer, a wax, and atactic polypropylene.

Abstract: A composition comprising a blend of no more than about 10% by weight of a low molecular weight, isotactic poly-1-butene polymer with a melt index in the range of greater than 100 to about 1000, and at least about 90% by weight of a propylene polymer, including articles and fibers prepared therefrom.

Abstract: Films or sheets are fabricated from blends of an ethylenic homopolymer or copolymer, a butene-1 homopolymer or copolymer, and a propylene homopolymer or copolymer wherein the weight percent of the homopolymer or copolymer is equal or greater than 25 w % and is less that of the butene-1 homopolymer or copolymer which result in good peel seal characteristics.

Abstract: A composition consisting essentially of a blend of about 60 to 75% by weight of an isotactic butene-1 homopolymer with a melt index of more than 100 to 1000, about 23.5 to 39.88% by weight of stabilized propylene polymer, and about 0.02 to 1.5% by weight of high density polyethylene, and optionally, up to 0.1 to 1% of a mold release agent and articles prepared therefrom.

Abstract: It has now been found that certain properties including peel seal characteristics of wrapping films or sheets may be improved by fabricating films or sheets from blends of high molecular weight butene-1 homopolymers or copolymers, and low density polyethylene (either modified or non-modified) and wherein such films or sheets can be bonded to a substrate such as aluminum foil, by coextrusion or lamination, with or without a tie layer adhesive forming novel structures.

Abstract: Films or sheets are fabricated from blends of an ethylenic homopolymer or copolymer, a butene-1 homopolymer or copolymer, and a propylene homopolymer or copolymer wherein the weight percent of the homopolymer or copolymer is equal or greater than 25 w % and is less that of the butuene-1 homopolymer or copolymer which result in good peel seal characteristics.

Abstract: Film or sheets and a laminar structure fabricated from blends of an ethylene-carboxylic copolymer, a butene-1 homopolymer or copolymer, and a propylene homopolymer or copolymer.

Abstract: A composition of matter or a film for producing a peelable heat seal between substrates on which it is carried, comprising a blend of:(a) about 6 to about 25 weight percent of polybutylene having a melt index of about 0.1 to about 500;(b) about 75 to about 92 weight percent of modified EVA or modified low density polyethylene; and(c) about 2 to about 15 weight percent of polypropylene; andwherein said blends are coated onto either nylon or polycarbonate.

Abstract: The invention is a shrinkable thermoplastic film which has good clarity and good processability, comprising a mixture containing:from about 10% by weight to about 60% by weight butene-1 propylene copolymer, where the propylene comonomer content of said butene-1 propylene copolymer is from about 5 m % to about 40 m %; andfrom about 40% by weight to about 90% by weight propylene homopolymer or copolymer.

Abstract: A blend for producing a heat shrinkable oriented thermoplastic film which has good clarity and good processability, comprising a mixture containing:from about 10% by weight to about 60% by weight butene-1 propylene copolymer, where the propylene comonomer content of said butene-1 propylene copolymer is from about 5 m % to about 40 m %; andfrom about 40% by weight to about 90% by weight propylene homopolymer or copolymer.

Abstract: A composition of matter or a film for producing a peelable heat seal between substrates on which it is carried, comprising a blend of:(a) about 6 to about 25 weight percent of polybutylene having a melt index of about 0.1 to about 500;(b) about 75 to about 92 weight percent of modified EVA or modified low density polyethylene; and(c) about 2 to about 15 weight percent of polypropylene; and whereinsaid blends are coated onto either nylon or polycarbonate.

Abstract: A polymer blend with good hot tack and a low and broad heat seal initiation temperature range for vertical and horizontal form and fill film packaging which contains a copolymer of butene-1 and propylene and a copolymer of propylene and ethylene.

Abstract: A room temperature aged polymer film having good hot tack, low heat sealing temperature and high clarity for packaging which contains a polypropylene or polypropylene-based copolymer or blend as a substrate or core layer and a polymer blend as a surface layer, wherein the polymer blend comprises a butene-1-propylene copolymer with a propylene comonomer content of from about 10% by weight to about 25% by weight.

Abstract: An unusual polybutene-1 polymer blend based on the ability of polybutene-1 to undergo random scission of molecules in a chemical cracking process. Such cracked polymer when blended back with the parent polybutene-1 produces a unique molecular weight distribution which is manifested in a unique and valuable combination of processing behavior and mechanical, optical and thermal properties of film made from the blend. Good hot tack, low heat sealing temperature and high clarity as well as improved processability are simultaneously achieved in these films.

Abstract: Films or sheets are fabricated from blends of an ethylenic polymer or copolymer, a butene-1 polymer or copolymer, and a propylene polymer or copolymer which result in improved optical clarity, heat seal strength and peel seal characteristics.

Abstract: Films or sheets are fabricated from blends of an ethylenic polymer or copolymer, a butene-1 polymer or copolymer, and a propylene polymer or copolymer which result in improved optical clarity, heat seal strength and peel seal characteristics.