# US 9,040,627 B2 · Artificial turf yarn

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- Number: US 9,040,627 B2
- Document ID: US9040627B2
- Status: Granted
- Kind: B2
- Application number: 13/639,757
- Filed: 2011-03-30
- Published: 2013-01-31
- Granted: 2015-05-26
- Earliest claimed: 2010-04-07
- Assignees: Dow Global Technologies LLC
- Applicants: Jill M. Martin; Peter Sandkuehler
- Inventors: Jill M. Martin; Peter Sandkuehler
- Web page: https://patentgrep.com/patent/US9040627B2

## CPC

- E01C 13/08: Surfaces simulating grass {; Grass-grown sports grounds (grass-like surfaces for skiing E01C13/12)}
- D01F 6/46: of polyolefins
- D06N 7/0065: {characterised by the pile}
- D06N 2201/0254: Polyolefin fibres
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR

## Abstract

Provided is an artificial turf yarn having improved heat resistance, durability, softness and extensibility. The artificial turf yarn contains two components: an olefin block copolymer (OBC) and a linear low density polyethylene (LLDPE). The yarn includes from about 10 wt % to about 80 wt % of the OBC and from about 20 wt % to about 90 wt % of the LLDPE which produces an artificial turf yarn with improved softness and toughness while maintaining heat resistance.

## Claims

### Claim 1

An artificial turf yarn comprising:
from about 10 wt % to about 80 wt % of an olefin block copolymer (OBC) having a density from about 0.866 g/cc to less than 0.900 g/cc and from about 20 wt % to about 90 wt % of a linear low density polyethylene (LLDPE) having a density from 0.910 g/cc to 0.935 g/cc, the yarn having a shrinkage less than 8%.

### Claim 2 (depends on 1)

The artificial turf yarn of claim 1 having a tenacity greater than about 0.7 cN/dtex.

### Claim 3 (depends on 1)

The artificial turf yarn of claim 1 having an elongation at failure greater than about 80%.

### Claim 4 (depends on 1)

The artificial turf yarn of claim 1, wherein the OBC has a melt index from about 0.5 g/10 min to about 5 g/10 min as measured in accordance with ASTM D1238 190° C./2.16 kg.

### Claim 5 (depends on 1)

The artificial turf yarn of claim 1, wherein the LLDPE has a melt index from about 0.5 g/10 min to about 10 g/10 min as measured in accordance with ASTM D1238 190° C./2.16 kg.

### Claim 6 (depends on 1)

The artificial turf yarn of claim 1, wherein the yarn comprises from about 20 wt % to about 50 wt % of the OBC and from about 50 wt % to about 80 wt % of the LLDPE.

### Claim 7 (depends on 1)

The artificial turf yarn of claim 1, wherein the yarn has a density from about 0.905 g/cc to about 0.940 g/cc and a shrinkage less than 6%.

### Claim 8 (depends on 1)

The artificial turf yarn of claim 1, wherein the yarn has a melt index from about 1 g/10 min to about 5 g/10 min as measured in accordance with ASTM D1238 190° C./2.16 kg.

### Claim 9

An artificial turf yarn comprising:
from about 10 wt % to about 80 wt % of an olefin block copolymer (OBC) having a density from about 0.866 g/cc to less than 0.900 g/cc and from about 20 wt % to about 90 wt % of a linear low density polyethylene (LLDPE) having a density from 0.910 g/cc to 0.935 g/cc, the yarn having a density less than 0.920 g/cc and a shrinkage less than 6%.

### Claim 10 (depends on 9)

The artificial turf yarn of claim 9, wherein the OBC has a density from about 0.866 g/cc to about 0.887 g/cc.

### Claim 11 (depends on 9)

The artificial turf yarn of claim 9, wherein the LLDPE has a density of 0.935 g/cc.

### Claim 12 (depends on 9)

The artificial turf yarn of claim 9, wherein the OBC has a melt index from about 0.5 g/10 min to about 5 g/10 as measured in accordance with ASTM D1238 190° C./2.16 kg.

### Claim 13 (depends on 9)

The artificial turf yarn of claim 9, wherein the LLDPE has a melt index from about 0.5 g/10 min to about 10 g/10 min as measured in accordance with ASTM D1238 190° C./2.16 kg.

### Claim 14

An artificial turf comprising:
a backing substrate; and
a yarn coupled to the backing substrate, the yarn comprising from about 10 wt % to about 80 wt % of an olefin block copolymer (OBC) having a density from about 0.866 g/cc to less than 0.900 g/cc and from about 20 wt % to about 90 wt % of a linear low density polyethylene (LLDPE) having a density from 0.910 g/cc to 0.935 g/cc.

### Claim 15 (depends on 14)

The artificial turf of claim 14, wherein the OBC has a density from about 0.866 g/cc to about 0.887 g/cc.

### Claim 16 (depends on 1)

The artificial turf yarn of claim 1, wherein the OBC is an ethylene multi-block interpolymer having an ethylene content from 55 wt % to 95 wt %.

### Claim 17 (depends on 9)

The artificial turf yarn of claim 9, wherein the OBC is an ethylene multi-block interpolymer having an ethylene content from 55 wt % to 95 wt %.

### Claim 18 (depends on 14)

The artificial turf yarn of claim 14, wherein the OBC is an ethylene multi-block interpolymer having an ethylene content from 55 wt % to 95 wt %.