Transmission belt

Patent metadata

Field	Value
Publication number	US-11326665-B2
Application number	US-201716303402-A
Country	US
Kind code	B2
Filing date	May 23, 2017
Priority date	May 23, 2016
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

The present invention relates to a transmission belt which is provided with: a rubber layer that is formed from a vulcanized product of a rubber composition which contains a rubber component containing an ethylene-α-olefin elastomer, a filler containing silica, a vulcanizing agent containing a sulfur-based vulcanizing agent, and a curable resin containing an amino resin; and a fiber member that is in contact with the rubber layer.

First claim

The invention claimed is:

1. A toothed belt comprising:
a belt main body comprising a plurality of tooth portions arranged at predetermined intervals along a belt longitudinal direction, and a back portion in which a tension member is buried; and
a cover fabric covering surfaces of the plurality of tooth portions,
wherein the belt main body is formed of a vulcanizate of a rubber composition comprising:
a rubber component comprising an ethylene-α-olefin elastomer,
a filler comprising a silica,
a vulcanizing agent comprising a sulfur-containing vulcanizing agent, and
16.7 to 50 parts by mass of a curable resin comprising an amino resin with respect to 100 parts by mass of silica.

2. The toothed belt according to claim 1 ,
wherein the amino resin comprises a melamine resin.

3. The toothed belt according to claim 1 ,
wherein the filler further comprises a carbon black.

4. The toothed belt according to claim 3 ,
wherein the ratio of the silica is from 10 to 150 parts by mass with respect to 100 parts by mass of carbon black.

5. The toothed belt according to claim 3 , wherein the silica is contained in an amount of from 5 to 30 parts by mass and the carbon black is contained in an amount of from 10 to 100 parts by mass, with respect to 100 parts by mass of the rubber component.

6. The toothed belt according to claim 1 ,
wherein the sulfur-containing vulcanizing agent is selected from the group consisting of powdered sulfur, precipitated sulfur, colloidal sulfur, insoluble sulfur, highly dispersible sulfur, and combinations thereof.

7. The toothed belt according to claim 1 ,
wherein the curable resin comprises substantially no resorcinol resin.

8. The toothed belt according to claim 1 ,
wherein the vulcanizing agent comprises substantially no organic peroxide.

9. The toothed belt according to claim 1 ,
wherein the tension member comprises an inorganic fiber.

10. The toothed belt according to claim 1 ,
wherein the sulfur-containing vulcanizing agent comprises powdered sulfur.

Assignees

• Mitsuboshi Belting Ltd

Inventors

• Ozaki Toshiki
• Hineno Yorifumi
• Isoe Shunsuke

Classifications

• C08L23/16

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08K7/04

  inorganic · CPC title

• C08K3/36

  Silica · CPC title

• F16G1/08 Primary

  with reinforcement bonded by the rubber · CPC title

• C08K3/06

  Sulfur · CPC title