# US 11,440,298 B2 · Pouch and film for a pouch

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- Number: US 11,440,298 B2
- Document ID: US11440298B2
- Status: Granted
- Kind: B2
- Application number: 15/635,961
- Filed: 2017-06-28
- Published: 2019-01-03
- Granted: 2022-09-13
- Earliest claimed: 2017-06-28
- Assignees: Scholle IPN Corporation
- Applicants: Scholle IPN Corporation
- Inventors: David Bellmore; Joel Monroe
- Web page: https://patentgrep.com/patent/US11440298B2

## CPC

- B32B 27/08: of synthetic resin
- B32B 1/00: Layered products having a non-planar shape
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/08: of synthetic resin
- B32B 15/09: comprising polyesters
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/327: {comprising polyolefins obtained by a metallocene or single-site catalyst}
- B32B 27/36: comprising polyesters
- B65D 41/02: Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D 75/008: {Standing pouches, i.e. "Standbeutel"}
- B65D 75/30: Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
- B32B 2250/02: 2 layers
- B32B 2250/05: 5 or more layers
- B32B 2250/24: All layers being polymeric
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/20: Inorganic coating
- B32B 2307/412: Transparent
- B32B 2307/514: Oriented
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7246: Water vapor barrier
- B32B 2323/046: LDPE, i.e. low density polyethylene
- B32B 2329/04: Polyvinylalcohol
- B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate
- B32B 2439/06: Bags, sacks, sachets
- B32B 2439/40: Closed containers
- B32B 2439/46: Bags
- B32B 2439/70: Food packaging
- B32B 2439/80: Medical packaging
- B65D 65/40: Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)}
- B65D 75/5883: {connected to the package at the sealed junction of two package walls}
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A film for use in the formation of a flexible package that has a first layer and a second layer that are laminated together to form a two layer laminate. The first layer is a base comprising polyethylene terephthalate, with at least one of the outer surface and the inner surface having a barrier layer disposed thereon. The second layer is a coextrusion having a core layer comprising an ethylene vinyl alcohol with an outer upper layer of a linear low density polyethylene and an outer lower layer of linear low density polyethylene.

## Claims

### Claim 1

A film for use in the formation of a flexible package comprising:
a first layer and a second layer, the first layer having an outer surface and an inner surface, and the second layer having an outer surface and an inner surface, the inner surface of the first layer laminated to the outer surface of the second layer to form a two layer laminate,
the first layer further comprising a base comprising polyethylene terephthalate, with at least one of the outer surface and the inner surface having a barrier layer disposed thereon; and
the second layer comprising a coextrusion having a core layer comprising an ethylene vinyl alcohol with an outer upper layer comprising linear low density polyethylene and an outer lower layer comprising linear low density polyethylene.

### Claim 2 (depends on 1)

The film of claim 1 wherein the second layer further includes an upper tie layer between the upper outer layer and the core layer and a lower tie layer between the lower outer layer and the core layer, the upper tie layer and the lower tie layer each comprising a maleic anhydride modified linear low density polyethylene.

### Claim 3 (depends on 2)

The film of claim 2 wherein the barrier layer comprises one of the group selected from: Aluminum Oxides (AlOx), Silicone Oxides (SiOx), polyvinyl alcohol (PVOH), polyvinylidene chloride (PVdC) and combinations of the foregoing.

### Claim 4 (depends on 3)

The film of claim 3 wherein the first layer has a thickness of approximately 12 μm.

### Claim 5 (depends on 4)

The film of claim 4 wherein the upper outer layer has a thickness of approximately 33 μm and the lower outer layer has a thickness of approximately 33 μm.

### Claim 6 (depends on 5)

The film of claim 5 wherein the ethylene vinyl alcohol comprises 29 mol % ethylene.

### Claim 7 (depends on 6)

The film of claim 6 wherein the core layer has a thickness of approximately 8 μm.

### Claim 8 (depends on 7)

The film of claim 7 wherein the second layer has a thickness of approximately 89 μm.

### Claim 9 (depends on 8)

The film of claim 8 wherein the upper outer layer and the lower outer layer are substantially identical.

### Claim 10 (depends on 1)

The film of claim 1 wherein the film is substantially transparent.

### Claim 11

A film for use in the formation of a flexible package comprising:
a first layer and a second layer, the first layer having an outer surface and an inner surface, and the second layer having an outer surface and an inner surface, the inner surface of the first layer laminated to the outer surface of the second layer to form a two layer laminate,
the first layer further comprising a base comprising polyethylene terephthalate, with at least one of the outer surface and the inner surface having a barrier layer disposed thereon, the first layer having a thickness of approximately 12 μm;
the second layer comprising a coextrusion having a thickness of approximately 89 μm, and having a core layer comprising a 29 mol % ethylene ethylene vinyl alcohol with an outer upper layer comprising linear low density polyethylene and an outer lower layer comprising linear low density polyethylene, with an upper tie layer between the upper outer layer and the core layer, and a lower tie layer between the lower outer layer and the core layer, the core layer having a thickness of approximately 8 μm, with each of the upper outer layer and the lower outer layer having a thickness of approximately 33 μm.

### Claim 12 (depends on 11)

The film of claim 11 wherein the barrier layer comprises an Aluminum Oxide (AlOx).

### Claim 13 (depends on 11)

The film of claim 11 wherein the barrier layer comprises one of the group consisting of: Silicon Oxides (SiOx), polyvinyl alcohol (PVOH), polyvinylidene chloride (PVdC) and combinations of the foregoing.

### Claim 14 (depends on 12)

The film of claim 12 wherein the upper and lower tie layers comprise a maleic anhydride modified linear low density polyethylene.

### Claim 15 (depends on 14)

The film of claim 14 wherein the first layer and the second layer are laminated with an adhesive.

### Claim 16 (depends on 11)

The film of claim 11 wherein the oxygen transmission measured in cc/100 in2/day at 100% O2 in a 50/50% relative humidity at 23° C. is less than 0.010.

### Claim 17 (depends on 11)

The film of claim 11 wherein the oxygen transmission measured in cc/100 in2/day at 100% O2 in a 50/50% relative humidity at 23° C. of the film after submersion in water at 95° C. for 10 minutes is less than 0.010.

### Claim 18

A pouch comprising:
a front panel and a back panel sealed together with a seal to define a cavity, with a spout coupled to at least one of the front panel and the back panel, the spout having an opening providing communication into the cavity, wherein,
at least one of the front panel and the back panel are formed, at least partially from a film comprising:
a first layer and a second layer, the first layer having an outer surface and an inner surface, and the second layer having an outer surface and an inner surface, the inner surface of the first layer laminated to the outer surface of the second layer to form a two layer laminate,
the first layer further comprising a base comprising polyethylene terephthalate, with at least one of the outer surface and the inner surface having a barrier layer disposed thereon; and
the second layer comprising a coextrusion having a core layer comprising an ethylene vinyl alcohol with an outer upper layer comprising linear low density polyethylene and an outer lower layer comprising linear low density polyethylene.

### Claim 19 (depends on 18)

The pouch of claim 18 further comprising a base gusset panel.