IP Library › Granted Patent US 9,403,643
Granted Patent B2
US 9,403,643 · App. 14/784,861 · Granted Aug 2, 2016

Rubber composition for conveyor belt, and conveyor belt

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Quick Facts
Patent No.
US 9,403,643
App. No.
14/784,861
Granted
Aug 2, 2016
Kind
B2
Abstract

The present technology provides a rubber composition for a conveyor belt. The rubber composition comprises: a rubber component containing butadiene rubber and/or styrene butadiene rubber, carbon black, sulfur, and a vulcanization accelerator; the glass transition temperature of the butadiene rubber and the styrene butadiene rubber being −65° C. or lower; the nitrogen adsorption specific surface area of the carbon black being 90 m 2 /g or less; the total content of the butadiene rubber and the styrene butadiene rubber being 50% by mass or greater relative to the content of the rubber component; the content of the carbon black being from 30 to 50 parts by mass per 100 parts by mass of the rubber component; and the mass ratio (sulfur/vulcanization accelerator) of the content of the sulfur to the content of the vulcanization accelerator being 1.5 or less.

Claims (34)

1. A rubber composition for a conveyor belt comprising:

a rubber component containing butadiene rubber and/or styrene butadiene rubber, carbon black, sulfur, and a vulcanization accelerator;

a glass transition temperature of the butadiene rubber and the styrene butadiene rubber being −65° C. or lower;

a nitrogen adsorption specific surface area of the carbon black being 90 m 2 /g or less;

a total content of the butadiene rubber and the styrene butadiene rubber being 50% by mass or greater relative to a content of the rubber component;

a content of the carbon black being from 30 to 50 parts by mass per 100 parts by mass of the rubber component; and

a mass ratio (sulfur/vulcanization accelerator) of a content of the sulfur to a content of the vulcanization accelerator being 1.5 or less.

2. The rubber composition for a conveyor belt according to claim 1 , wherein the nitrogen adsorption specific surface area of the carbon black is 60 m 2 /g or greater.

3. The rubber composition for a conveyor belt according to claim 1 , wherein the rubber composition is used in a conveyor belt for use in cold regions.

4. A conveyor belt formed by using the rubber composition for a conveyor belt described in claim 1 .

5. A conveyor belt comprising:

an upper cover rubber layer, a reinforcing layer, and a lower cover rubber layer;

at least the lower cover rubber layer being formed by using the rubber composition for a conveyor belt described in claim 1 .

6. The conveyor belt according to claim 4 , wherein the conveyor belt is for use in cold regions.

7. The rubber composition for a conveyor belt according to claim 2 , wherein the rubber composition is used in a conveyor belt for use in cold regions.

8. A conveyor belt formed by using the rubber composition for a conveyor belt described in claim 2 .

9. A conveyor belt formed by using the rubber composition for a conveyor belt described in claim 3 .

10. A conveyor belt formed by using the rubber composition for a conveyor belt described in claim 7 .

11. A conveyor belt comprising:

an upper cover rubber layer, a reinforcing layer, and a lower cover rubber layer;

at least the lower cover rubber layer being formed by using the rubber composition for a conveyor belt described in claim 2 .

12. A conveyor belt comprising:

an upper cover rubber layer, a reinforcing layer, and a lower cover rubber layer;

at least the lower cover rubber layer being formed by using the rubber composition for a conveyor belt described in claim 3 .

13. A conveyor belt comprising:

an upper cover rubber layer, a reinforcing layer, and a lower cover rubber layer;

at least the lower cover rubber layer being formed by using the rubber composition for a conveyor belt described in claim 7 .

14. The conveyor belt according to claim 5 , wherein the conveyor belt is for use in cold regions.

15. The conveyor belt according to claim 8 , wherein the conveyor belt is for use in cold regions.

16. The conveyor belt according to claim 9 , wherein the conveyor belt is for use in cold regions.

17. The conveyor belt according to claim 10 , wherein the conveyor belt is for use in cold regions.

18. The conveyor belt according to claim 11 , wherein the conveyor belt is for use in cold regions.

19. The conveyor belt according to claim 12 , wherein the conveyor belt is for use in cold regions.

20. The conveyor belt according to claim 13 , wherein the conveyor belt is for use in cold regions.

Assignments (2)
CHANGE OF ADDRESS FOR ASSIGNEE Recorded Nov 18, 2023
From: THE YOKOHAMA RUBBER CO., LTD.
To: THE YOKOHAMA RUBBER CO., LTD.
Reel/Frame 065626/0740 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 30, 2015
From: SASAKUMA, HIDEHIRO; SUEFUJI, RYOTARO; MIYAJIMA, ATSUSHI; HOU, GANG
To: THE YOKOHAMA RUBBER CO., LTD.
Reel/Frame 036928/0715 →