# US 11,298,922 B2 · Packaging laminate

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- Number: US 11,298,922 B2
- Document ID: US11298922B2
- Status: Granted
- Kind: B2
- Application number: 16/106,230
- Filed: 2018-08-21
- Published: 2018-12-13
- Granted: 2022-04-12
- Earliest claimed: 2016-02-24
- Assignees: BMSI, Inc.
- Applicants: BMSI, Inc.
- Inventors: Lee Phillips Gilbert
- Web page: https://patentgrep.com/patent/US11298922B2

## CPC

- B32B 27/08: of synthetic resin
- B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/18: characterised by the use of special additives
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/205: {the fillers creating voids or cavities, e.g. by stretching}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/308: {comprising acrylic (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 2250/03: 3 layers
- B32B 2250/246: All polymers belonging to those covered by groups B32B27/32 and B32B27/30
- B32B 2264/104: Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2272/00: Resin or rubber layer comprising scrap, waste or recycling material
- B32B 2307/31: Heat sealable
- B32B 2307/41: Opaque
- B32B 2307/514: Oriented
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/5825: Tear resistant
- B32B 2307/7244: Oxygen barrier
- B32B 2307/7246: Water vapor barrier
- B32B 2307/732: Dimensional properties
- B32B 2307/744: Non-slip, anti-slip
- B32B 2307/748: Releasability
- B32B 2307/75: Printability
- B32B 2439/40: Closed containers
- B32B 2439/70: Food packaging
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

Disclosed herein are compositions and methods related to a packaging laminate comprising: a first polymeric layer comprising a polypropylene copolymer or a high density polyethylene (HDPE) resin; and a second polymeric layer comprising a high density polyethylene (HDPE) resin or linear low density polyethylene (LLDPE) resin with a coextruded ethyl vinyl alcohol (EVOH) compatibilizer. Also disclosed herein are packaging containers formed of the packaging laminates.

## Claims

### Claim 1

A packaging container, comprising:
a container body formed of a packaging laminate, wherein the packaging laminate comprises:
a first layer, constituting an outer layer of the packaging laminate, comprising a high density polyethylene (HDPE) resin, wherein the first layer comprises a first side and a second side, and wherein the second side of the first layer comprises reverse printing;
a second layer adjacent the second side of the first layer, constituting an inner layer of the packaging laminate, comprising a linear low density polyethylene (LLDPE) resin with a coextruded ethyl vinyl alcohol (EVOH) film barrier, and a metallocene catalyst present in an amount of about 5 to 33 percent by weight of the second layer; and
a degassing valve removably attached to the container body, wherein the degassing valve comprises HDPE, and
wherein the first layer has a thickness of about 0.5 MTh to about 1.5 MTh and the second layer has a thickness of about 2 MTh to about 5 MIL.

### Claim 2 (depends on 1)

The packaging container of claim 1, wherein the HDPE comprises between 75 and 100 percent by weight of the first layer.

### Claim 3 (depends on 2)

The packaging container of claim 2, wherein the first layer further comprises octene in an amount of 8 to 20 percent by weight of the first layer.

### Claim 4 (depends on 1)

The packaging container of claim 1, wherein the first layer further comprises a calcium carbonate filler.

### Claim 5

A packaging container, comprising:
a container body formed of a packaging laminate, wherein the packaging laminate comprises:
a print layer, constituting an outer layer of the packaging laminate, comprising a high density polyethylene (HDPE) resin, wherein the print layer comprises a first side and second side, and wherein the second side comprises reverse printing,
a core layer adjacent the second side of the print layer, constituting an intermediate layer of the packaging laminate, comprising a HDPE resin, a linear low density polyethylene (LLDPE) resin, a low density polyethylene (LDPE) resin, or combinations thereof, and
a sealant layer, constituting an inner layer of the packaging laminate, comprising a LLDPE resin with a coextruded ethyl vinyl alcohol (EVOH) film barrier, EVOH compatibilizer, and a catalyst present in an amount of about 5 to 33 percent by weight of the sealant layer, and
a degassing valve removably attached to a wall of the container body, and
wherein the print layer has a thickness of about 0.8 MTh to about 2.5 MIL, the sealant layer has a thickness of about 2 MTh to about 4 MIL, and the core layer has a thickness of about 0.4 MTh to about 4 MTh.

### Claim 6 (depends on 5)

The packaging container of claim 5, wherein the EVOH compatibilizer is present in a 1:1 ratio with the EVOH film barrier.

### Claim 7 (depends on 5)

The packaging container of claim 5, wherein the catalyst is a metallocene catalyst.

### Claim 8 (depends on 5)

The packaging container of claim 5, wherein the print layer has a thickness of about 0.8 MTh to about 1 MTh.

### Claim 9 (depends on 5)

The packaging container of claim 5, wherein the HDPE comprises at least 40 percent by weight of the print layer.

### Claim 10 (depends on 5)

The packaging container of claim 5, wherein each layer of the packaging laminate has a haze value of about 10 percent to about 60 percent.

### Claim 11 (depends on 5)

The packaging container of claim 5, wherein the packaging container has a percentage of residual oxygen of about 2.65 percent or less over a time period of 52 weeks.

### Claim 12 (depends on 5)

The packaging container of claim 5, wherein the sealant layer further comprises a HDPE resin or a LDPE resin.

### Claim 13 (depends on 5)

The packaging container of claim 5, wherein the sealant layer further comprises or about 8 percent to about 20 percent weight of an ionomer.

### Claim 14

A packaging container, comprising:
a container body formed of a packaging laminate, wherein the packaging laminate comprises:
an outer layer comprising a high density polyethylene (HDPE) resin, wherein the outer layer comprises a first side and a second side, and wherein the second side comprises reverse printing;
an intermediate layer adjacent the second side of the outer layer comprising a HDPE resin, a linear low density polyethylene (LLDPE) resin, a low density polyethylene (LDPE) resin, or combinations thereof; and
a sealant layer, constituting an inner layer of the packaging laminate, comprising a LLDPE resin with a compatibilizer, ethyl vinyl alcohol (EVOH), and a catalyst present in an amount of about 5 to 33 percent by weight of the sealant layer, wherein the compatibilizer and EVOH are present in a 1:1 ratio, and
a degassing valve removably attached to the container body, wherein the degassing valve comprises HDPE,
wherein the outer layer has a thickness of about 0.8 MTh to about 1.25 MTh, the sealant layer has a thickness of about 2 MTh to about 3.5 MTh, and the intermediate layer has a thickness of about 1 MTh to about 3 MTh.

### Claim 15 (depends on 14)

The packaging container of claim 14, wherein the packaging container is recyclable to the same extent as #2 HDPE film.

### Claim 16 (depends on 5)

The packaging container of claim 5, wherein the packaging container is recyclable to the same extent as #2 HDPE film.

### Claim 17 (depends on 1)

The packaging container of claim 1, wherein the second layer further comprises an EVOH compatibilizer.

### Claim 18 (depends on 17)

The packaging container of claim 17, wherein the EVOH compatibilizer is present in a 1:1 ratio with the EVOH film barrier and comprises between about 2 and 15 percent of the total weight of the second layer.

### Claim 19 (depends on 14)

The packaging container of claim 14, wherein the catalyst is a metallocene catalyst.