Sheet, method for manufacturing the same, and tire comprising the same

Patent metadata

Field	Value
Publication number	US-2019193465-A1
Application number	US-201816201966-A
Country	US
Kind code	A1
Filing date	Nov 27, 2018
Priority date	Dec 22, 2017
Publication date	Jun 27, 2019
Grant date	—

Abstract

Provided are a sheet, a method of its preparation, and a tire comprising the sheet, wherein the sheet comprises tire cords, a topping rubber for topping the tire cords, and a conductive fiber located on the surface of the topping rubber.
The sheet can provide tires, on which a rubber composition with a low electricity-transmitting property and low rolling resistance is applied, with excellent conductivity.

First claim

1 . A sheet, comprising:
tire cords; a topping rubber, which is for topping the tire cords; and a conductive fiber, which is located on the surface of the topping rubber, wherein the conductive fiber comprises a carbon fiber, or a fiber in which a metal is coated on the surface of at least one fiber selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber.

2 . The sheet of claim 1 ,
wherein the conductive fiber is one where the fiber on which a metal is coated or the carbon fiber is blended with any fiber selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber.

3 . The sheet of claim 1 ,
wherein the synthetic fiber is one selected from the group consisting of a polyester fiber, a polyamide fiber, a polyacrylonitrile fiber, and a polyurethane fiber.

4 . The sheet of claim 1 ,
wherein the natural fiber is one selected from the group consisting of a hemp fiber and a cotton fiber.

5 . The sheet of claim 1 ,
wherein the regenerated cellulose fiber is one selected from the group consisting of rayon and a regenerated cellulose fiber prepared using N-methylmorpholine N-oxide (NMMO).

6 . The sheet of claim 1 ,
wherein the fiber on which a metal is coated is a fiber, in which a metal is coated on the surface of one selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber, by a method selected from the group consisting of electroplating, electroless plating, chemical vapor deposition plating, and physical vapor deposition plating.

7 . The sheet of claim 2 ,
wherein the fiber on which a metal is coated or the carbon fiber is blended with any one fiber selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber in a weight ratio of 10:90 to 90:10.

8 . The sheet of claim 1 ,
wherein the diameter of the conductive fiber is from 0.05 mm to 0.5 mm, 5 'S to 100 'S based on spun yarn, and 50 denier to 1,000 denier based on filament yarn.

9 . The sheet of claim 1 ,
wherein the sheet comprises 1 to 60 conductive fibers.

10 . The sheet of claim 1 ,
wherein the topping rubber comprises: 100 parts by weight of a raw material rubber, which comprises 20 to 50 parts by weight of a natural rubber and 50 to 80 parts by weight of a styrene butadiene rubber; and 20 to 60 parts by weight of carbon black, which has a stactical thickness surface area (STSA) value of 29 m 2 /g to 39 m 2 /g, an oil absorption number of compressed sample (COAN) value of 69 cc/100 g to 79 cc/100 g, an oil absorption number of sample (OAN) value of 85 cc/100 g to 95 cc/100 g, and an iodine adsorption value of 31 mg/g to 41 mg/g.

11 . The sheet of claim 1 ,
wherein the topping rubber comprises: 100 parts by weight of a raw material rubber, which comprises 10 to 40 parts by weight of a synthetic styrene butadiene rubber and 60 to 90 parts by weight of a natural rubber; 10 to 40 parts by weight of a first carbon black, which has an STSA value of 29 m 2 /g to 39 m 2 /g, a COAN value of 69 cc/100 g to 79 cc/100 g, an OAN value of 85 cc/100 g to 95 cc/100 g, and an iodine adsorption value of 31 mg/g to 41 mg/g; and 20 to 50 parts by weight of a second carbon black, which has an STSA value of 70 m 2 /g to 80 m 2 /g, a COAN value of 83 cc/100 g to 93 cc/100 g, an OAN value of 96 cc/100 g to 108 cc/100 g, and an iodine adsorption value of 76 mg/g to 88 mg/g.

12 . A method for preparing a sheet, comprising:
preparing a carbon fiber, or a fiber in which a metal is coated on the surface of at least one fiber selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber; processing the fiber in which a metal is coated or the carbon fiber by texturing; preparing a conductive fiber by blending the surface of the texturing-processed fiber on which a metal is coated or carbon fiber with any one fiber selected from the group consisting of a synthetic fiber, a regenerated cellulose fiber, and a natural fiber; and topping the tire cords with a topping rubber and attaching the conductive fiber to the surface of the topping rubber at the time of rolling or cutting.

13 . The tire comprising the sheet of claim 1 .

Assignees

• Hankook Tire Co Ltd

Inventors

• Lee Ji Wan
• Lee Mi Jung
• Kim Sung Tae
• Ko Kil Ju
• Park Il Yong
• Sung Su Hong

Classifications

• C08L9/06

  Copolymers with styrene · CPC title

• B60C19/084 Primary

  using conductive carcasses · CPC title

• B29D30/38

  Textile inserts, e.g. cord or canvas layers, for tyres (making woven fabrics D03D); Treatment of inserts prior to building the tyre (pretreatment of inserts B29B15/00; manufacture of layers comprising fibrous parallel reinforcements of substantial or continuous length B29C70/20) · CPC title

• B29D30/08

  Building tyres · CPC title

• C08L9/00

  Compositions of homopolymers or copolymers of conjugated diene hydrocarbons · CPC title