Abstract: A multilayer film structure having at least two layers wherein the first layer comprises poly(ethylene) having a density range from about 0.93 g/cc to 0.97 g/cc; and a second layer comprising poly(ethylene) having a density range from 0.89 g/cc to 0.93 g/cc wherein the second layer is capable of forming a heat seal. The multilayer film structure is capable of being laminated to another film structure or a packaging film component. The packages of the present invention are useful for the packaging of flowable materials.

Abstract: Multilayer films and packaging structure made therefrom which incorporate a peelable seal which operates via two peel mechanisms which are temperature dependent. The multilayered films and the packages in which they are utilized, have multiple layers including a fifth layer comprising high density polyethylene; a fourth layer comprising high density polyethylene, a third layer comprising high density polyethylene; a second layer comprising high density polyethylene and polybutylene and a first layer comprising ethylene vinyl acetate copolymer, polyethylene plastomer and polybutylene.

Abstract: A multilayer film structure having at least two layers wherein the first layer comprises poly(ethylene) having a density range from about 0.93 g/cc to 0.97 g/cc; and a second layer comprising poly(ethylene) having a density range from 0.89 g/cc to 0.93 g/cc wherein the second layer is capable of forming a heat seal. The multilayer film structure is capable of being laminated to another film structure or a packaging film component. The packages of the present invention are useful for the packaging of flowable materials.

Abstract: A heat sealed, easy-opening and reclosable package, which comprises a packaging material comprised of a heat sealable base member material, and an elongate, multilayer, flexible, peelable and reclosable strip positioned between the surfaces of juxtaposed portions of base member material and comprised of an interior tacky adhesive layer, a first and second surface sealant layers, the strip including a rupturable layer proximate the tacky adhesive layer. The base member material is heat sealed together along and by means of the strip whereat the sealant layers of the strip are heat sealed to the base member. The heat seal has sufficient initial seal strength to remain closed during handling of the package and yet is manually readily openable and reclosable.

Abstract: A polymeric laminate for use in polymeric films, and packaging material and packages made therefrom, that is roughened or knurled to produce a series of nicks or cuts over substantially the entire surface area of the laminate, producing an easy-opening feature. The laminate may be a multilayer, polymeric structure that may comprise an oriented polypropylene, polyethylene terephthalate, or a biaxially oriented nylon. The packaging material of the invention may contain a sealant film, either a single layer or multilayer film, and may also comprise an intermediate layer of foil.

Abstract: Novel films are disclosed which contain blends of ethylene-based copolymers or other elastomers with polypropylene and polyethylene. Typical films have two-five layers wherein at least one layer is a blend of high density polyethylene with an ethylene-based copolymer or another elastomer and has additional layers of polypropylene blended with an ethylene-based copolymer or another elastomer.

Abstract: Multiple layer films, and novel polymer compositions, for use in packaging sterile medical products and shelf stable foods. The films include at least two layers of modified polypropylene-based compositions, and optionally a third layer of polypropylene-based composition. The two layers of the film comprise polypropylene polymers having melting point temperatures, differing by at least 3.degree. C., with corresponding ethylene contents disparate by at least 1 weight percent ethylene. In 2-layer films, the compositions include ethylene butene-1 copolymer in both layers, and optionally an elastomer in either or both layers. Three and four layer films are set forth wherein outer polypropylene based layers protect the inner layers, as of the two layer composition, from bonding to corresponding portions of adjacent like layers. The films can be fabricated into packages formed as by heat sealing.

Abstract: The invention discloses a multiple layer film useful in packaging, and the packages made therefrom. A first layer of the film is a material containing an ester group, a polycarbonate or a polyether block amide copolymer. A second layer of the film is a sealant, preferably polypropylene polymer blended with an elastomeric styrene ethylene butylene styrene copolymer. A third functionally adhesive layer is between the first and second layers. The composition of the third adhesive layer is typically either a polypropylene modified with a carboxy group such as an organic acid or anhydride or a styrene ethylene butylene styrene copolymer.

Abstract: The invention discloses a multiple layer film useful in packaging, and the packages made therefrom. A first layer of the film is a material containing an ester group, a polycarbonate or a polyether block amide copolymer. A second layer of the film is a sealant, preferably polypropylene polymer blended with an elastomeric styrene ethylene butylene styrene copolymer. A third functionally adhesive layer is between the first and second layers. The composition of the third adhesive layer is typically either a polypropylene modified with a carboxy group such as an organic acid or anhydride or a styrene ethylene butylene styrene copolymer.

Abstract: This invention pertains to the use of polymer blends in making multiple layer films. In some layers, the elastomer or ethylene-based copolymer is blended with polypropylene, and in some layers, with polyethylene. Typical films have two to five layers. In multilayer films, at least one layer of a blend of polyethylene, preferably high density polyethylene, with elastomer and/or ethylene-based copolymers. Another layer is polypropylene blended with elastomers and/or ethylene-based copolymers. The films may have as few as two layers, one each having polypropylene and polyethylene, preferably high density polyethylene. Additional layers may be added to the two or three layer films taught herein, for variety of purposes.

Abstract: The invention provides improved film structure and bags made therefrom for use in sterile packaging, wherein the package and product are sterilized after the process of filling and sealing the bag. The improved structure is a 3-layer coextruded film comprising a first layer of propylene ethylene copolymer, a second layer on one surface of the first layer and comprising a blend of propylene ethylene copolymer with linear low density polyethylene, and a third layer of linear low density polyethylene on the opposing surface of the second layer. The blend composition is 20% to 80% propylene ethylene copolymer and 80% to 20% linear low density polyethylene.