# US 9,040,162 B2 · Films matted on one side and the use thereof

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- Number: US 9,040,162 B2
- Document ID: US9040162B2
- Status: Granted
- Kind: B2
- Application number: 13/505,628
- Filed: 2010-11-03
- Published: 2012-08-30
- Granted: 2015-05-26
- Earliest claimed: 2009-11-05
- Assignees: Epurex Films GmbH & Co. KG
- Applicants: Helge Kosthorst; Dirk Schultze
- Inventors: Helge Kosthorst; Dirk Schultze
- Web page: https://patentgrep.com/patent/US9040162B2

## CPC

- B32B 27/08: of synthetic resin
- B32B 27/28: comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42}
- B32B 27/40: comprising polyurethanes
- C08G 18/4833: {Polyethers containing oxyethylene units}
- C08G 18/4854: {Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group}
- C08G 18/6674: {with compounds of group C08G18/3203}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C08L 75/08: from polyethers
- Y10T 428/24942: including components having same physical characteristic in differing degree
- Y10T 428/2495: Thickness [relative or absolute]
- Y10T 428/31554: Next to second layer of polyamidoester
- Y10T 428/31587: Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to multi-layer elastic thermoplastic films, which consist of at least one layer of thermoplastic polyurethane (TPE-U), at least one further layer of thermoplastic polyurethane which is blended with modified acrylonitrile-butadiene-styrene copolymer (MABS), and optionally at least one support layer of thermoplastic polymer which is incompatible with TPE-U, and to the use thereof.

## Claims

### Claim 1

An at least three layer elastic, thermoplastic film having good surface slip, wherein the film comprises a first layer (1) comprising a thermoplastic polyurethane, a second layer (2) comprising a mixture of a thermoplastic polyurethane and a modified acrylonitrile-butadiene-styrene copolymer, and a third layer (3) comprising a low-density polyethylene which is incompatible with thermoplastic polyurethane.

### Claim 2 (depends on 1)

The film according to claim 1, wherein the second layer (2) is arranged between the first layer (1) and the third layer (3).

### Claim 3 (depends on 1)

The film according to claim 1, wherein the proportion by weight of the first layer (1) in the film is at least 70 wt. %.

### Claim 4 (depends on 1)

The film according to claim 1, wherein the film comprises six layers with three first layers (1), one third layer (3) and two second layers (2) arranged between the third layer (3) and first layers (1).

### Claim 5 (depends on 1)

The film according to claim 1, wherein the mixture of layer (2) consists of 5 to 40 wt. % modified acrylonitrile-butadiene-styrene copolymer and 60 to 95 wt. % thermoplastic polyurethane.

### Claim 6 (depends on 1)

The film according to claim 1, wherein the thermoplastic polyurethane used in layer (1) comprises soft segments made up of poly-tetrahydrofuran and polyethylene glycol ether groups

### Claim 7 (depends on 1)

The film according to claim 1, wherein the thermoplastic polyurethane used in layer (1) comprises soft segments made up of poly-ether carbonate groups.

### Claim 8 (depends on 1)

The film according to claim 1, wherein the film is produced by a blown film process.

### Claim 9 (depends on 1)

The film according to claim 1, wherein the film has an overall thickness of 25 μm to 150 μm, wherein the thickness of the first layer(s) (1) is between 5 μm and 45 μm and the thickness of the second layer(s) (2) is between 5 μm and 45 μm and the thickness of the third layer (3) is between 15 μm and 100 μm.

### Claim 10 (depends on 1)

A membrane system comprising the film according to claim 1.

### Claim 11 (depends on 1)

A wound covering comprising the film according to claim 1.

### Claim 12 (depends on 1)

The film according to claim 1, wherein in a film wherein the first layer (1) and the second layer (2) are of 20 μm thickness the gloss determined according to DIN 67530 is 1.6 at 20° and the ultimate tensile stress is 35 MPa measured according to DIN EN ISO 527.