Carbon fiber cord for reinforcing rubber product and rubber product using the same

Patent metadata

Field	Value
Publication number	US-9752649-B2
Application number	US-201414762665-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 30, 2013
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

The present invention provides a carbon fiber cord having both high bending fatigue resistance and high adhesiveness. The disclosed carbon fiber cord is a carbon fiber cord for reinforcing a rubber product. This carbon fiber cord includes a carbon fiber, a first coating layer formed on the carbon fiber, and a second coating layer formed over the first coating layer. The first coating layer contains a phenolic resin and does not contain a rubber component. The second coating layer contains a rubber component. The mass ratio of the first coating layer to the total mass of the carbon fiber and the first coating layer is in a range of 0.5% to 10%.

First claim

The invention claimed is:

1. A carbon fiber cord for reinforcing a rubber product, wherein the cord comprises:
a carbon fiber;
a first coating layer formed on the carbon fiber; and
a second coating layer formed over the first coating layer, wherein
the first coating layer contains a phenolic resin and does not contain a rubber component,
the second coating layer contains a rubber component and is formed using a treatment agent that contains the rubber component and a crosslinking agent which is at least one of a diisocyanate compound, a polyisocyanate, an aromatic nitroso compound, and a maleimide-based crosslinking agent and does not contain an initial condensate of resorcin and formaldehyde,
a mass ratio of the first coating layer to a total mass of the carbon fiber and the first coating layer is in a range of from 0.5% to 10%, and
a mass ratio of the second coating layer to a total mass of the carbon fiber, the first coating layer, and the second coating layer is in a range of from 10% to 25%.

2. The carbon fiber cord according to claim 1 , wherein the phenolic resin is a copolymer of resorcin, a phenolic compound other than resorcin, and formaldehyde.

3. The carbon fiber cord according to claim 2 , wherein the phenolic compound is parachlorophenol or phenol.

4. The carbon fiber cord according to claim 1 , wherein the second coating layer contains hydrogenated nitrile rubber.

5. A rubber product comprising the carbon fiber cord according to claim 1 .

6. The carbon fiber cord according to claim 1 , wherein the crosslinking agent comprises a diisocyanate compound.

7. The carbon fiber cord according to claim 1 , wherein the crosslinking agent comprises a polyisocyanate.

8. The carbon fiber cord according to claim 1 , wherein the crosslinking agent comprises an aromatic nitroso compound.

9. The carbon fiber cord according to claim 1 , wherein the crosslinking agent comprises a maleimide-based crosslinking agent.

10. The carbon fiber cord according to claim 4 , wherein the crosslinking agent comprises a diisocyanate compound.

11. The carbon fiber cord according to claim 4 , wherein the crosslinking agent comprises a polyisocyanate.

12. The carbon fiber cord according to claim 4 , wherein the crosslinking agent comprises an aromatic nitroso compound.

13. The carbon fiber cord according to claim 4 , wherein the crosslinking agent comprises a maleimide-based crosslinking agent.

14. The carbon fiber cord according to claim 4 , wherein the hydrogenated nitrile rubber comprises a carboxylated hydrogenated nitrile rubber.

15. The carbon fiber cord according to claim 1 , wherein the cord further comprises a third coating layer formed over the second coating layer.

16. The carbon fiber cord according to claim 1 , wherein the mass ratio of the second coating layer to the total mass of the carbon fiber, the first coating layer, and the second coating layer is in a range of from 13% to 19%.

17. The carbon fiber cord according to claim 15 , wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 0.5% to 8%.

18. The carbon fiber cord according to claim 15 , wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 1.0% to 5.0%.

19. The carbon fiber cord according to claim 15 , wherein a mass ratio of the third coating layer to a total mass of the carbon fiber, the first coating layer, the second coating layer, and the third coating layer is in a range of from 1.8% to 3.8%.

Assignees

• Nippon Sheet Glass Co Ltd

Inventors

• Katagiri Shinya

Classifications

• D06M15/693

  with natural or synthetic rubber, or derivatives thereof · CPC title

• D10B2101/12

  Carbon; Pitch · CPC title

• C08J5/06

  using pretreated fibrous materials · CPC title

• F16G1/10 Primary

  with textile reinforcement · CPC title

• C08J2309/02

  Copolymers with acrylonitrile · CPC title