# US 11,897,248 B2 · Multilayer cling film

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- Number: US 11,897,248 B2
- Document ID: US11897248B2
- Status: Granted
- Kind: B2
- Application number: 16/168,372
- Filed: 2018-10-23
- Published: 2019-04-25
- Granted: 2024-02-13
- Earliest claimed: 2017-10-23
- Assignees: Flexopack S.A.
- Applicants: Flexopack S.A.
- Inventors: Dimitris Ginosatis
- Web page: https://patentgrep.com/patent/US11897248B2

## CPC

- B32B 7/06: permitting easy separation
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/283: {comprising polysiloxanes}
- 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)}
- C08L 83/04: Polysiloxanes
- B32B 2250/24: All layers being polymeric
- B32B 2250/44: Number of layers variable across the laminate
- B32B 2264/0264: Polyamide particles
- B32B 2307/51: Elastic
- B32B 2307/554: Wear resistance
- B32B 2307/7242: Non-permeable
- B32B 2307/7244: Oxygen barrier
- B32B 2307/732: Dimensional properties
- B32B 2307/748: Releasability
- B32B 2439/00: Containers; Receptacles
- 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

A film comprising a release layer and an adhesive layer, wherein the thickness of the film is less than 25 microns.

## Claims

### Claim 1

A film comprising a release layer and an inner adhesive layer, wherein the kinetic coefficient of friction of the release layer surface of the film measured according to ASTM D 1894 (film to film measurement) is less than 0.3, wherein the release layer comprises at least 200 ppm of an amide lubricant which is erucamide, and wherein the film thickness is less than 17 microns.

### Claim 2 (depends on 1)

The film of claim 1, wherein the release layer of the film comprises from 0.1 to 10% by weight polydimethylsiloxane.

### Claim 3 (depends on 1)

The film of claim 1, wherein the inner adhesive layer comprises ethylene vinyl acetate copolymer.

### Claim 4 (depends on 1)

The film of claim 1, wherein the release layer comprises a polyolefin homopolymer or copolymer.

### Claim 5 (depends on 1)

The film of claim 1, wherein between the inner adhesive and release layer there is at least one tie layer.

### Claim 6 (depends on 1)

A method for wrapping food which comprises wrapping the film of claim 1 around a food item.