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US 6,579,584 B1Granted
High strength flexible film package utilizing thin film
AssigneeCryovac, Inc.
InventorStephen F. Compton
Life of this patent
Estimating the term…
Abstract
An article, such a bag, pouch, casing, or sheet formed from joined film pieces, comprises a non-crosslaminated film. The article has a parallel plate burst strength of at least 190 inches of water, with the film having a thickness of from 1 to 2.9 mils. The film comprises one or more of a wide variety of polymers, with linear low density polyethylene being a preferred polymer. The film is heat sealed to itself or another film (preferably a similar or identical film). The burst strength is surprising in view of the thin gauge of the film, and the fact that the film is not cross-laminated.
Claims27
An article comprising a non-crosslamiated film with a thickness of from about 1 to 2.9:
- mils, the non-crosslaminated film consisting essentially of at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polyester homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ionomer, ethylene/carbon monoxide copolymer, very low density polyethylene, low density polyethylene, polypropylene homopolymer, ethylene/propylene/diene terpolymer, ethylene/norbornene copolymer, styrene homopolymer, and ethylene/styrene copolymer;
- and
- the non-crosslaminated film is bonded to itself or a second component with a thickness of from about 1 to 2.9 mils, the second component comprising at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polyester homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ionomer, ethylene/carbon monoxide copolymer, very low density polyethylene, low density polyethylene, polypropylene homopolymer, ethylene/propylene/diene terpolymer, ethylene/norbornene copolymer, styrene homopolymer, and ethylene/styrene copolymer;
- and
- wherein the article has a parallel plate burst strength of at least 275 inches of water.
2 more elements
An article comprising a first multilayer film sealed to a second multilayer film, wherein:
- (A) the first multilayer film consists essentially of at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, low density polyethylene, very low density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polypropylene homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ester homopolymer, ionomer, ethylene/carbon monoxide copolymer, ethylene/propylene/diene terpolymer, ethylene/norbornene copolymer, styrene homopolymer, and ethylene/styrene copolymer;
- and
- (B) the second multilayer film comprises at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, low density polyethylene, very low density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polypropylene homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ester homopolymer, ionomer, ethylene/carbon monoxide copolymer, ethylene/propylene/diene terpolymer, ethylene/norbornene copolymer, styrene homopolymer and ethylene/styrene copolymer;
- and
- wherein the first multilayer film is not a cross-laminated film and the second multilayer film is not a cross-laminated film, and the first multilayer film has a thickness of from about 1 to 2.9 mils and the second multilayer film has a thickness of from about 1 to 2.9 mils, and wherein the article has a parallel plate burst strength of at least about 275 inches of water, and the article is made by sealing the first multilayer film to the second multilayer film.
2 more elements
A packaged product comprising a package and a product surrounded by the package, wherein:
- (A) the package comprises a non-crosslaminated film with a thickness of from about 1 to 2.9 mils, the non-crosslaminated film consisting essentially of at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polyester homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ionomer, ethylene/carbon monoxide copolymer, very low density polyethylene, low density polyethylene, polypropylene homopolymer, ethylene/norbornene copolymer, styrene homopolymer, and ethylene/styrene copolymer, and the non-crosslaminated film is sealed to itself or a second film with a thickness of from about 1 to 2.9 mils, the second film comprising at least one member selected from the group consisting of linear low density polyethylene, high density polyethylene, homogeneous ethylene/alpha-olefin copolymer, polyester homopolymer, ethylene/acid copolymer, ethylene/ester copolymer, ionomer, ethylene/carbon monoxide copolymer, very low density polyethylene, low density polyethylene, polypropylene homopolymer, ethylene/propylene/diene terpolymer, ethylene/norbornene copolymer, styrene homopolymer, and ethylene/styrene copolymer, wherein the article has a parallel plate burst strength of at least 275 inches;
- and
- (B) wherein the product comprises at least one member selected from the group consisting of compact disks, records, audio cassettes, video cassettes, tool, hardware, machinery parts, appliances, marine hardware, corrodible metal products, industrial parts containing rust inhibitor, aerosol spray can, wax, powdered chemicals, liquid chemical concentrate, industrial cartridge packs, toys, bearings, drywall, concrete board, bricks, dry pet food, adhesive, caulk, plaster mix, precut unassembled wood products, coffee, hops, shrimp, peanuts, retortable pouches, viscous fluids, explosives, frozen products, ballistic cargo, textile products, furniture, cars, boats, products dangerous for children, fertilizer and grain, plants, insecticide, sand bags, water, seeds, skis, works of art, unmilled wood, lumber, tires, and hemmocult specimens.
Dependencies are inferred from the claim text.