Metal cord, metal cord/rubber composite and conveyor belt

Patent metadata

Field	Value
Publication number	US-11773534-B2
Application number	US-201917251313-A
Country	US
Kind code	B2
Filing date	Jun 12, 2019
Priority date	Jun 12, 2018
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord ( 10 ) composed of a plurality of metal filaments ( 11 ) twisted together, the surfaces of the metal filaments ( 11 ) constituting the outermost layer are each provided with a zinc plating layer ( 16 ), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer ( 16 ) are less than 120.

First claim

The invention claimed is:

1. A metal cord composed of a plurality of metal filaments twisted together,
characterized in that surfaces of the metal filaments constituting an outermost layer are each provided with a zinc plating layer,
wherein degrees of crystal orientation F (002) and F (102) of the (002) plane and the (102) plane of a surface of the zinc plating layer, as represented by the following Formulae (1) and (2), respectively, are less than 120:
F (002) −( R 1 (002) /R 0 (002) )×100(%)  (1)

F (102) −( R 1 (102) /R 0 (102) )×100(%)  (2)

where:
in Formula (1),
R0 (002) represents the diffraction peak intensity of the (002) plane of non-oriented zinc, which is 22.1, and R1 (002) represents the diffraction peak intensity of the (002) plane of an evaluation sample of zinc; and
in Formula (2),
R0 (102) represents the diffraction peak intensity of the (102) plane of non-oriented zinc, which is 8.4, and R1 (102) represents the diffraction peak intensity of the (102) plane of the evaluation sample of zinc.

2. The metal cord according to claim 1 , wherein the degrees of crystal orientation F (101) and F (100) of the (101) plane and the (100) plane of the surface of the zinc plating layer, as represented by the following Formulae (3) and (4), respectively, are 100 or more:
F (101) =( R 1 (101) /R 0 (101) ×100(%)  (3)

F (100) =( R 1 (100) /R 0 (100) )×100(%)  (4)

where:
in Formula (3),
R0 (101) represents the diffraction peak intensity of the (101) plane of non-oriented zinc, which is 56.4, and R1 (101) represents the diffraction peak intensity of the (101) plane of the evaluation sample of zinc; and
in Formula (4),
R0 (100) represents the diffraction peak intensity of the (100) plane of non-oriented zinc, which is 13.2, and R1 (100) represents the diffraction peak intensity of the (100) plane of the evaluation sample of zinc.

3. The metal cord according to claim 1 , having a brass plating layer inside the zinc plating layer.

4. The metal cord according claim 1 , wherein the metal filaments are steel filaments.

5. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 1 , in a rubber composition.

6. A conveyor belt comprising the metal cord according to claim 1 .

7. The metal cord according to claim 2 , having a brass plating layer inside the zinc plating layer.

8. The metal cord according claim 2 , wherein the metal filaments are steel filaments.

9. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 2 , in a rubber composition.

10. A conveyor belt comprising the metal cord according to claim 2 .

11. The metal cord according claim 3 , wherein the metal filaments are steel filaments.

12. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 3 , in a rubber composition.

13. A conveyor belt comprising the metal cord according to claim 3 .

14. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 4 , in a rubber composition.

15. A conveyor belt comprising the metal cord according to claim 4 .

16. The metal cord according claim 7 , wherein the metal filaments are steel filaments.

17. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 7 , in a rubber composition.

18. A conveyor belt comprising the metal cord according to claim 7 .

19. A metal cord-rubber composite formed by embedding the metal cord(s) according to claim 8 , in a rubber composition.

20. A conveyor belt comprising the metal cord according to claim 8 .

Assignees

• Bridgestone Corp

Inventors

• Obana Naohiko
• Oono Yoshiaki

Classifications

• D07B1/0613 Primary

  the reinforcing cords being characterised by the rope configuration · CPC title

• B65G15/36

  the layers incorporating ropes, chains, or rolled steel sections · CPC title

• D07B1/0626

  the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration · CPC title

• D07B2201/2023

  with core · CPC title

• D07B2201/2061

  resulting in a twisted structure · CPC title