# US 11,077,640 B2 · Adhesive tape with fine-stitch stitch-bonded web

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- Number: US 11,077,640 B2
- Document ID: US11077640B2
- Status: Granted
- Kind: B2
- Application number: 14/757,692
- Filed: 2015-12-23
- Published: 2016-06-23
- Granted: 2021-08-03
- Earliest claimed: 2014-12-23
- Assignees: Coroplast Fritz Müller GmbH & Co. KG
- Applicants: Coroplast Fritz Müller GmbH & Co. KG
- Inventors: Gülay Wittig; Guido Vorwerk; Christoph Lodde
- Web page: https://patentgrep.com/patent/US11077640B2

## CPC

- B32B 5/10: characterised by a fibrous {or filamentary} layer reinforced with filaments
- B32B 5/022: {Non-woven fabric}
- B32B 5/06: characterised by a fibrous {or filamentary} layer {mechanically connected, e.g. by needling} to another layer, e.g. of fibres, of paper
- B32B 25/08: of synthetic resin
- B32B 25/14: comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)}
- B32B 27/08: of synthetic resin
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/26: using curing agents
- C09J 7/21: Paper; Textile fabrics
- B32B 2250/02: 2 layers
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0261: Polyamide fibres
- B32B 2262/0276: Polyester fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2262/0292: Polyurethane fibres
- B32B 2262/04: Cellulosic plastic fibres, e.g. rayon
- B32B 2272/00: Resin or rubber layer comprising scrap, waste or recycling material
- B32B 2307/102: Insulating
- B32B 2307/204: Di-electric
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/56: Damping, energy absorption
- B32B 2307/582: Tearability
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/732: Dimensional properties
- B32B 2405/00: Adhesive articles, e.g. adhesive tapes
- C09J 2203/302: for bundling cables
- C09J 2301/302: the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
- C09J 2301/312: parameters being the characterizing feature
- C09J 2400/263: in the substrate
- C09J 2421/00: Presence of unspecified rubber
- C09J 2433/00: Presence of (meth)acrylic polymer
- C09J 2467/006: in the substrate
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

An adhesive tape, including a substrate including a stitched fleece and an adhesive layer applied one-side on the substrate, wherein the stitched fleece is formed from fibers, which are stitched with stitching yarns. A manually tearable adhesive tape is disclosed, with improved abrasion resistance properties together with a high noise damping. The stitching yarns may be stitched with a fineness of at least F24.

## Claims

### Claim 1

An adhesive tape comprising a substrate including a stitched fleece and an adhesive layer applied to one side of the substrate,
wherein the stitched fleece is formed from short fibers and long fibers which are stitched with sewing threads, the length of the long fibers being greater than the length of the short fibers,
wherein all of the long and short fibers in the stitched fleece completely consist of polyester (PES), the proportion of the long fibers is in the range from 60% to 90% and the proportion of short fibers correspondingly is in the range from 40% to 10% based on the weight of the long and short fibers,
wherein the long fibers have a fiber length (L1) in the range from 60 mm to 120 mm, and the short fibers have a fiber length (L2) in the range from 35 mm to 55 mm,
wherein the stitching yarns sewing threads are stitched with a fineness of at least F 24,
wherein the stitched fleece has a thickness (D1) in the range of 0.16 mm to 0.27 mm,
wherein the stitched fleece has a tear resistance in the range from 8,000 mN to 18,000 mN, an elongation at break in the range from 10% to 50%, and a breaking force in the range from 20 N/cm to 55 N/cm in accordance with standard LV 312;
wherein the sewing threads are made from filaments with a filament count in the range from 30 to 48;
wherein the adhesive tape has an abrasion resistance in the range from class B to class C.

### Claim 2 (depends on 1)

The adhesive tape according to claim 1, wherein the sewing threads are stitched in the stitched fleece with a fineness in a range from F 24 to F 28.

### Claim 3 (depends on 1)

The adhesive tape according to claim 1, wherein the sewing threads are stitched in the stitched fleece with a stitch length in a range from 0.7 mm to 1.7 mm.

### Claim 4 (depends on 1)

The adhesive tape according to claim 1, wherein the sewing threads have a linear density in the range from 20 dtex to 76 dtex.

### Claim 5 (depends on 1)

The adhesive tape according to claim 1, wherein the stitched fleece has an elongation at break in the range from 20% to 50%-according to the standard LV 312.

### Claim 6 (depends on 1)

The adhesive tape according to claim 1, wherein the stitched fleece has a breaking force in the range from 35 N/cm to 55 N/cm according to the standard LV 312.

### Claim 7 (depends on 1)

The adhesive tape according to claim 1, wherein the adhesive tape has an elongation at break in the range from 17% to 28% according to the standard LV 312.

### Claim 8 (depends on 1)

The adhesive tape according to claim 1, wherein the adhesive tape has a breaking force in the range from 20 N/cm to 48 N/cm according to the standard LV 312.

### Claim 9 (depends on 1)

The adhesive tape according to claim 1, wherein the fibers have a linear density in the range from 2 dtex to 4 dtex.

### Claim 10 (depends on 1)

The adhesive tape according to claim 1, wherein at least a portion of the sewing threads completely or partially comprise polyester (PES).

### Claim 11 (depends on 1)

The adhesive tape according to claim 1, wherein the stitched fleece has a grammage in a range of 60 g/m2 to 92 g/m2.

### Claim 12 (depends on 1)

The adhesive tape according to claim 1, wherein the adhesive layer further comprises a pressure-sensitive adhesive.

### Claim 13 (depends on 1)

The adhesive tape according to claim 1, wherein the adhesive layer has an application weight in the range from 40 g/m2 to 100 g/m2.

### Claim 14 (depends on 12)

The adhesive tape according to claim 12 wherein the pressure-sensitive adhesive comprises a UV-crosslinkable acrylate.