Multi-layer film
AssigneeBerry Plastics Corporation
InventorMartin F. Hoenigmann
Life of this patent
Estimating the term…
Abstract
A multi-layer film includes a first-seal layer and a second-seal layer. The multi-layer film may be used to form a package for consumer-care products.
Claims20
A package comprising
- a bag formed to include an interior product storage region, and
- a first closure located on a first end of the bag,
- wherein the bag is formed of a multi-layer film including a first-seal layer, a second-seal layer, and a deformation-resistant layer extending between and interconnecting the first-seal layer and the second-seal layer, and the multi-layer film is configured to maximize a heat seal temperature range used to form the first closure and to minimize deformation of the bag so that an outer surface of the package remains uninterrupted during handling of the package.
The package of claim 8, wherein the deformation-resistant layer comprises about 10% by weight to about 90% by weight polypropylene impact copolymer.
The package of claim 9, wherein the deformation-resistant layer comprises about 5% by weight to about 60% by weight metallocene polyethylene copolymer.
The package of claim 11, wherein the heat seal temperature range is about 270° F. to about 400° F.
The package of claim 13, wherein the deformation-resistant layer comprises a blend of an mLLDPE and a polypropylene impact copolymer.
A multi-layer film comprising
- a first-seal layer,
- a second-seal layer located in spaced-apart relation to the first-seal layer, and
- a deformation-resistant layer arranged to extend between and interconnect the first-seal layer and the second-seal layer,
- wherein the deformation-resistant layer is configured to minimize deformation of the multi-layer film during handling so that an outer surface of the multi-layer film remains uninterrupted.
A method of making a package, the method comprising
- providing a multi-layer film comprising a first-seal layer, a second-seal layer, and a deformation-resistant layer extending between and interconnecting the first-seal layer and the second-seal layer, and the multi-layer film,
- forming a bag using the multi-layer film, and
- sealing the bag to form a closure on the bag to establish the package,
- wherein the sealing step is performed at a temperature selected from a range of about 230° F. to about 400° F. and wherein the deformation-resistant layer comprises a polypropylene impact copolymer.
Dependencies are inferred from the claim text.