TIRE CORD FABRIC, METHOD OF MANUFACTURING SAME, SHEET INCLUDING SAME, AND TIRE INCLUDING SHEET

• US 20200130432A1
• Filed: 10/15/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Application

• Current Assignee: Hankook Tire & Technology Co., Ltd.
• Original Assignee: Hankook Tire & Technology Co., Ltd.
• Inventors: LEE, Jiwan, CHUNG, Haekwang, KO, Kilju, LEE, Mijung, CHO, Hyunran, JO, Seokhee, PARK, Seungha
• Application Number:
  US16/653,972
• Publication Number:
  US 20200130432A1
• Time in Patent Office: Days
• CPC Class Codes: B60C 19/082 comprising a conductive tread insert
• CPC Class Codes: B60C 19/084 using conductive carcasses
• CPC Class Codes: B60C 9/0042 Reinforcements made of synthetic materials
• CPC Class Codes: D02G 3/48 Tyre cords tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606
• CPC Class Codes: D07B 1/0606 Reinforcing cords for rubber or plastic articles
• CPC Class Codes: Y02T 10/86 Optimisation of rolling resistance, e.g. weight reduction

Abstract

The present disclosure relates to a tire cord fabric, a method of manufacturing the same, a sheet including the same, and a tire including the sheet, and the tire cord fabric includes a plurality of tire cords which are arranged in parallel to each other, a weft yarn which weaves the tire cords to conduct a weaving operation, and a conductive fiber which comes into contact with the surface of the tire cord and is extended in a longitudinal direction of the tire cord. The tire cord fabric can effectively discharge static electricity aggregated in a tire by mixing a tire cord with a conductive fiber, thereby weaving a mixture of the tire cord and the conductive fiber. Particularly, the tire cord fabric can secure an effective conductive passage since the conductive fiber is extended in a radial direction from bead parts to a tread part as in a carcass cord. Therefore, the tire cord fabric can simultaneously accomplish solving of a static electricity problem and obtaining of a fuel efficiency improving effect through low rolling resistance as a result by decreasing a demand associated with electrical conductivity of a rubber composition for sidewall and a rubber composition for topping, thereby enabling a rubber composition having a low loss modulus (E″) for improving rolling resistance to be applied.

Claims

1. A tire cord fabric including:

a plurality of tire cords which are arranged in parallel to each other;

a weft yarn which weaves the tire cords to conduct a weaving operation; and

a conductive fiber which comes into contact with the surface of the tire cord and is extended in a longitudinal direction of the tire cord, wherein the conductive fiber is a fiber having metal plated on the surface thereof.

2. The tire cord fabric of claim 1, wherein the conductive fiber is fixed to the surface of the tire cord in a state that the conductive fiber is woven along with the tire cord by the weft yarn.

3. The tire cord fabric of claim 1, wherein the tire cord fabric includes 2 to 30 conductive fibers.

4. The tire cord fabric of claim 1, wherein the conductive fiber is obtained by plating metal on the surface of any one fiber selected from the group consisting of a synthetic fiber, a cellulose fiber, and a mixed yarn thereof.

5. The tire cord fabric of claim 4, wherein the synthetic fiber is any one selected from the group consisting of polyester, polyimide, polyurethane, acrylic fiber, modacrylic fiber, and mixed yarns thereof.

6. The tire cord fabric of claim 4, wherein the cellulose fiber is any one selected from the group consisting of rayon, lyocell, tencel, and mixed yarns thereof.

7. The tire cord fabric of claim 4, wherein the conductive fiber is any one selected from the group consisting of a filament yarn, a staple fiber, and a spun yarn.

8. The tire cord fabric of claim 7, wherein the spun yarn has 10 yarn counts ('"'"'S) to 100 yarn counts ('"'"'S), and the filament yarn has 10 deniers to 500 deniers.

13. A sheet including the tire cord fabric according to claim 1 and a topping rubber which performs a topping process on the tire cord fabric.

14. The sheet of claim 13, wherein the topping rubber comprises 100 parts by weight of raw rubber including 20 to 50 parts by weight of natural rubber and 50 to 80 parts by weight of emulsion-polymerized styrene butadiene rubber, and 20 to 60 parts by weight of carbon black having a statistical thickness surface area (STSA) value of 29 to 39 m2/g, an oil absorption number of compressed sample (COAN) value of 69 to 79 cc/100 g, an oil absorption number of sample (OAN) value of 85 to 95 cc/100 g, and an iodine adsorption amount value of 31 to 41 mg/g.

15. The sheet of claim 13, wherein the topping rubber comprises 100 parts by weight of raw rubber including 10 to 40 parts by weight of synthetic styrene butadiene rubber and 60 to 90 parts by weight of natural rubber, 10 to 40 parts by weight of a first carbon black having an STSA value of 29 to 39 m2/g, a COAN value of 69 to 79 cc/100 g, an OAN value of 85 to 95 cc/100 g, and an iodine adsorption amount value of 31 to 41 mg/g, and 20 to 50 parts by weight of a second carbon black having an STSA value of 70 to 80 m2/g, a COAN value of 83 to 93 cc/100 g, an OAN value of 96 to 108 cc/100 g, and an iodine adsorption amount value of 76 to 88 mg/g.

16. The sheet of claim 13, wherein the sheet is carcass.

17. A tire including the sheet according to claim 13.

18. The tire of claim 17, wherein the tire has a resistance value of 0.1 to 100 MΩ

at a voltage of 1,000 V.

9. A method of manufacturing a tire cord fabric, the method comprising a step of manufacturing a conductive fiber by plating metal on the surface of a fiber and a step of supplying a plurality of tire cords as a warp yarn and weaving a weft yarn with the tire cords to conduct a weaving operation, wherein the step of carrying out the weaving operation comprises mixing the conductive fiber with the tire cords to supply the conductive fiber as the warp yarn, and the conductive fiber is a fiber having metal plated on the surface thereof.

10. The method of claim 9, wherein the step of manufacturing the conductive fiber is performed by electroless plating copper sulfate on the surface of the fiber.

11. The method of claim 9, wherein the step of carrying out the weaving operation comprises warping or drawing the conductive fiber along with the tire cord.

12. The method of claim 9, wherein the step of carrying out the weaving operation comprises supplying the conductive fiber in the same heald, reed and dropper as the tire cord in the drawing process.