# US 2014/0150948 A1 · Overlay ply for a pneumatic tire

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- Number: US 2014/0150948 A1
- Document ID: US20140150948A1
- Status: Published application
- Kind: A1
- Application number: 13/690,347
- Filed: 2012-11-30
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: The Goodyear Tire & Rubber Company
- Applicants: The Goodyear Tire & Rubber Company
- Inventors: Mahesh Kavaturu; Walter Kevin Westgate; Mahmoud Cherif Assaad; Laurent Roger Andre Dubos; Marie Charlotte Chaidron; Plamen Kravaev
- Web page: https://patentgrep.com/patent/US20140150948A1

## CPC

- D02G 3/48: Tyre cords {(tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606)}
- B60C 9/005: {Reinforcements made of different materials, e.g. hybrid or composite cords}
- B60C 17/0009: {comprising sidewall rubber inserts, e.g. crescent shaped inserts}
- B60C 2009/2214: {characterised by the materials of the zero degree ply cords}
- B60C 2009/2257: {Diameters of the cords; Linear density thereof}
- B60C 2009/2266: {Density of the cords in width direction}
- D10B 2201/20: Cellulose-derived artificial fibres
- D10B 2331/02: polyamides (D10B2331/08 takes precedence)
- D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET]
- D02G: CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A composite cord includes at least one cellulose-fiber first yarn twisted helically about at least one second yarn. The second yarn includes at least one polyamide, polyester, or PEN. The first yarn has a first LASE and the second yarn has a second LASE. The first LASE is higher than the second LASE at a yarn elongation in a range from 0% to 10%.

## Claims

### Claim 1

A composite cord comprising at least one cellulose-fiber first yarn twisted helically about at least one second yarn, the second yarn comprising at least one polyamide, polyester, or PEN, the first yarn having a first LASE and the second yarn having a second LASE, the first LASE being higher than the second LASE at a yarn elongation in a range from 0% to 10%.

### Claim 2 (depends on 1)

The composite cord as set forth in claim 1 further comprising at least two cellulose-fiber first yarns twisted helically about the second yarn.

### Claim 3

A pneumatic tire comprising:
a carcass ply; and
a belt structure having an overlay ply disposed radially outward of the carcass ply
in a crown portion of the tire,
the overlay ply comprising at least one composite cord, the cord comprising one lyocell first yarn twisted helically about one nylon second yarn, the first yarn having a first modulus of elasticity and the second yarn having a second modulus of elasticity.

### Claim 4 (depends on 3)

The tire as set forth in claim 3 wherein the first yarn has a linear density value in the range of 1500 dtex to 1700 dtex.

### Claim 5 (depends on 4)

The tire as set forth in claim 4 wherein the second yarn has a linear density value in the range of 800 dtex to 1000 dtex.

### Claim 6 (depends on 5)

The tire as set forth in claim 5 wherein the composite cords have an end count per inch in the overlay ply in the range of 10-30 (3.9-11.9 ends per cm).

### Claim 7 (depends on 3)

The tire as set forth in claim 3 wherein the composite cords have a construction of 840 dtex/1 Nylon+1650 dtex/1 Lyocell 5.0Z+8.0Z/5.5S.

### Claim 8 (depends on 3)

The tire as set forth in claim 3 wherein the composite cords have a construction of 840 dtex/1 Nylon+1650 dtex/1 Lyocell 5.0S+8.0Z/5.5S.

### Claim 9 (depends on 3)

The tire as set forth in claim 3 wherein the composite cords have a construction of 840 dtex/1 Nylon+1650 dtex/2 Lyocell) 4.0S+6.0Z/5.5.

### Claim 10

A pneumatic tire comprising:
a carcass ply; and
a belt structure having an overlay ply disposed radially outward of the carcass ply
in a crown portion of the tire,
the overlay ply comprising at least one composite cord, the cord comprising two lyocell first yarns twisted helically about one nylon second yarn, the first yarn having a first modulus of elasticity and the second yarn having a second modulus of elasticity.

### Claim 11 (depends on 10)

The tire as set forth in claim 10 wherein the first yarns have a linear density value in the range of 1500 dtex to 1700 dtex.

### Claim 12 (depends on 11)

The tire as set forth in claim 11 wherein the second yarn has a linear density value in the range of 800 dtex to 1000 dtex.

### Claim 13 (depends on 12)

The tire as set forth in claim 12 wherein the composite cords have an end count per inch in the overlay ply in the range of 10-30 (3.9-11.9 ends per cm).

### Claim 14 (depends on 10)

The tire as set forth in claim 10 wherein the composite cords have a construction of 840 dtex/1 Nylon+1650 dtex/2 Lyocell) 4.0S+6.0Z/5.5S.

### Claim 15 (depends on 10)

The tire as set forth in claim 10 wherein the composite cords have a construction of ((800-1000) dtex/1 Nylon+(1500-1700) dtex/2 Lyocell) (2.0-6.0)S+(5.0-7.0)Z/(4.5-6.5)S.