Process of preparing a pouch for packaging flowable materials
First Claim
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1. A process of preparing a pouch in a vertical form containing a flowable material comprising the steps of forming a film structure;
- forming the film structure into a tubular member;
heat-sealing longitudinal edges and first transverse end of the tubular member to form the pouch;
filling the pouch with the flowable material; and
sealing a second transverse end of the tubular member, the film structure having at least one layer comprising;
(a) from 10 to 100 percent by weight of at least one homogeneously branched substantially linear ethylene/α
-olefin interpolymer, and(b) from 0 to 90 percent by weight of at least one polymer selected from the group consisting of a heterogeneously branched linear ethylene/C3 -C18 α
-olefin copolymer, a high-pressure low density polyethylene and an ethylene/vinyl acetate copolymer.
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Abstract
An environmentally friendly polymer film pouch made from a homogeneously branched substantially linear ethylene interpolymer film structure for the packaging of flowable materials such as milk, the pouch includes, for example, a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched substantially linear polyethylene. A process for making a pouch for packaging flowable materials using a homogeneously branched substantially linear ethylene interpolymer film structure is also disclosed.
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Citations
17 Claims
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1. A process of preparing a pouch in a vertical form containing a flowable material comprising the steps of forming a film structure;
- forming the film structure into a tubular member;
heat-sealing longitudinal edges and first transverse end of the tubular member to form the pouch;
filling the pouch with the flowable material; and
sealing a second transverse end of the tubular member, the film structure having at least one layer comprising;(a) from 10 to 100 percent by weight of at least one homogeneously branched substantially linear ethylene/α
-olefin interpolymer, and(b) from 0 to 90 percent by weight of at least one polymer selected from the group consisting of a heterogeneously branched linear ethylene/C3 -C18 α
-olefin copolymer, a high-pressure low density polyethylene and an ethylene/vinyl acetate copolymer. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- forming the film structure into a tubular member;
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2. A process of preparing a pouch in a vertical form containing a flowable material comprising the steps of forming a film structure;
- forming the film structure into a tubular member;
heat-sealing longitudinal edges and first transverse end of the tubular member to form the pouch;
filling the pouch with the flowable material; and
sealing a second transverse end of the tubular member, the film structure having at least one layer comprising;(I) (a) from 10 to 100 percent by weight of at least one homogeneously branched substantially linear ethylene/α
-olefin interpolymer, and(b) from 0 to 90 percent by weight of at least one polymer selected from the group consisting of a heterogeneously branched linear ethylene/C3 -C18 α
olefin copolymer, a high-pressure low density polyethylene and an ethylene/vinyl acetate copolymer; and
at least one layer comprising;(II) a heterogeneously branched linear ethylene/C3 -C18 α
-olefin copolymer having a density greater that about 0.87 g/cm3 and a melt index from about 0.1 to about 10 g/10 minutes. - View Dependent Claims (3)
- forming the film structure into a tubular member;
Specification