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US 5,208,094 AGranted
Multilayered film for packaging
OwnerJoseph Z. Suninventor
Life of this patent
Estimating the term…
Abstract
A film for packaging foodstuffs utilizing a first outer layer of a cross-linked olefin polymer and a second inner layer adapted for lying adjacent foodstuff being packaged. The second inner layer is constructed of a material having a self sealing capability and which produces a moisture barrier without preventing the passage of free oxygen through the second layer.
Claims11
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 3% to 15% by weight of vinyl acetate with the irradiation dosage for said crosslinking of said outer layer being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sandwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 4% to 17% of vinyl acetate by weight, adapted for lying adjacent to the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a block copolymer or terpolymer with irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 4% to 17% of vinyl acetate by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness comprising a single component polyolefin polymer with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness comprising a polypropylene polymer and polypropylene ethylene copolymer mixed with an elastomer of less than 50% by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness comprising a material selected from the group comprising of nylon, polyester, and polystyrene with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness comprising a material selected from the group of nylon, polyester, and polystyrene with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness comprising a polypropylene polymer and poylpropylene ethylene copolymer mixed with an elastomer of less than 50% by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness comprising a block copolymer or terpolymer with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness comprising a single component ethylene vinyl acetate copolymer having 9% to 17% vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a polypropylene polymer and polypropylene ethylene copolymer mixed with an elastomer of less than 50% by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 3% to 15% by weight of vinyl acetate with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 9% to 17% by weight of vinyl acetate, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a terpolymer or ionomer, adapted for lying adjacent to the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a material selected from the group of nylon, polyester, or polypropylene with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single compo-
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a terpolymer or ionomer, adapted for lying adjacent to the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a single component polyolefin with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 9% to 17% by weight of vinyl acetate, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a terpolymer or ionomer, adapted for lying adjacent to the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a single component polyolefin with the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a polypropylene polymer and polypropylene ethylene copolymer mixed with an elastomer of less than 50% by weight, adapted for lying adjacent the product, and producing a moisture barrier.
A multilayered film of 1.2 mils to 4.2 mils thick comprises the following layers:
- a. a crosslinked outer layer occupying between 60% to 98% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 3% to 15% of vinyl acetate by weight with said the irradiation dosage for said crosslinking being greater than 4 MR,
- b. an intermediate layer occupying between 0% to 20% of said multilayered film thickness, comprising a single component ethylene vinyl acetate copolymer having 9% to 17% of vinyl acetate by weight, and sanwiched between said outer layer and the following layer,
- c. an un-irradiated inner layer occupying between 2% to 40% of said multilayered film thickness, comprising a polypropylene polymer and polypropylene ethylene copolymer mixed with an elastomer of less than 50% by weight, adapted for lying adjacent the product, and producing a moisture barrier.
Dependencies are inferred from the claim text.