# US 12,600,115 B2 · Oriented polyethylene films and articles comprising the same

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- Number: US 12,600,115 B2
- Document ID: US12600115B2
- Status: Granted
- Kind: B2
- Application number: 17/756,165
- Filed: 2020-11-11
- Published: 2024-12-26
- Granted: 2026-04-14
- Earliest claimed: 2019-12-16
- Assignees: Dow Global Technologies LLC; Performance Materials NA, Inc.
- Applicants: Dow Global Technologies LLC
- Inventors: Justice Alaboson; Karlheinz Hausmann; Jian Wang; Yijian Lin; Cristina Serrat; Martin Hill
- Web page: https://patentgrep.com/patent/US12600115B2

## CPC

- B32B 27/08: of synthetic resin
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- 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 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 2250/24: All layers being polymeric
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/205: Metallic coating
- B32B 2264/00: Composition or properties of particles which form a particulate layer or are present as additives
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/30: having particular thermal properties
- B32B 2307/31: Heat sealable
- B32B 2307/516: mono-axially
- B32B 2307/518: bi-axially
- B32B 2307/704: Crystalline
- B32B 2307/72: Density
- B32B 2307/7244: Oxygen barrier
- B32B 2307/732: Dimensional properties
- B32B 2307/7376: Thickness
- B32B 2439/06: Bags, sacks, sachets
- 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
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention relates to oriented, multilayer polyethylene films. In one aspect, a biaxially oriented, multilayer polyethylene film comprises: at least one inner layer comprising: (1) a polyethylene-based composition that comprises: (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a density between 0.926 g/cm3 to 0.970 g/cm3 and a melt index (I2) between 0.1 to 10 g/10 min; (b) 20 to 5000 ppm, based on the total weight of the polyethylene-based composition of a sorbitol acetal derivative comprising the structure of formula (I): wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C1-C3 alkyl.

## Claims

### Claim 1

A biaxially oriented, multilayer polyethylene film comprising:
three to eleven layers comprising two outer layer and at least one inner layer comprising:
(1) a polyethylene-based composition that comprises:
(a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of one or more polyethylenes having a density between 0.926 g/cm3 to 0.970 g/cm3 and a melt index (I2) between 0.1 to 10 g/10 min;
(b) 20 to 5000 ppm, based on the total weight of the polyethylene-based composition of a sorbitol acetal derivative comprising the structure of formula (I):
wherein R1-R5 comprise the same or different moieties chosen from hydrogen and a C1-C3 alkyl.

### Claim 2 (depends on 1)

The film of claim 1, wherein the film is oriented in the machine direction at a draw ratio from 2:1 to 9:1 and in the cross direction at a draw ratio from 2:1 to 11:1.

### Claim 3 (depends on 1)

The film of claim 1, further comprising a second polyethylene composition, wherein the second polyethylene composition exhibits at least two local peaks, excluding the soluble fraction, in comonomer distribution measured by crystallization elution fractionation, wherein one of the peaks is between 40° C. and 95° C.

### Claim 4 (depends on 3)

The film of claim 3, wherein the layer comprising the polyethylene-based composition further comprises the second polyethylene composition.

### Claim 5 (depends on 1)

The film of claim 1, wherein the overall density is from 0.931 to 0.975 g/cm3.

### Claim 6 (depends on 1)

The film of claim 1, wherein the film has a thickness of 5 to 50 microns.

### Claim 7 (depends on 1)

The film of claim 1, further comprising a layer that comprises polyamide, ethylene vinyl alcohol, or a copolymer of ethylene and a carboxylic acid.

### Claim 8 (depends on 1)

The film of claim 1, wherein an outer layer is a sealant layer.

### Claim 9 (depends on 1)

The film of claim 1, further comprising a layer comprising a metal deposited on an outer layer of the film, wherein the metal comprises Al, Zn, Au, Ag, Cu, Ni, Cr, Ge, Se, Ti, Sn, Si, or oxides thereof.