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Rubber composition for conveyor belt, and conveyor belt

A technology of rubber composition and conveyor belt, applied in the direction of conveyor, transportation and packaging, can solve the problems of high tanδ, power saving can not meet recent people's requirements, etc., and achieve the effect of excellent power saving.

Active Publication Date: 2015-11-25
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] With reference to Patent Document 1, the inventors of the present invention studied a rubber composition for conveyor belts containing a rubber component having butadiene rubber, carbon black, sulfur, and a vulcanization accelerator, and found that after vulcanization, the rubber composition at low temperature (such as -40 ℃) is high in tanδ, and the power-saving performance at low temperatures does not meet the level that people have recently requested

Method used

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  • Rubber composition for conveyor belt, and conveyor belt
  • Rubber composition for conveyor belt, and conveyor belt
  • Rubber composition for conveyor belt, and conveyor belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1～6

[0119] The components shown in Table 1 below were mixed in proportions (parts by mass) shown in Table 1 below to prepare a rubber composition for conveyor belts.

[0120]

[0121] The obtained rubber composition was vulcanized at 148° C. for 30 minutes to prepare a vulcanized rubber composition. Then, the prepared vulcanized rubber composition was cut into short strips (20 mm in length×5 mm in width×2 mm in thickness) to obtain test pieces.

[0122] The tan δ of the obtained test piece was measured using a viscoelasticity spectrometer (manufactured by Toyo Seiki Seisakusho Co., Ltd.) (measurement temperature: -40°C, -20°C, 20°C). In addition, when measuring tan δ, the test piece was stretched by 10%, and a vibration of an amplitude of ±2% was applied at a frequency of vibration of 20 Hz. The results are shown in Table 1. In view of the excellent power-saving properties at low temperatures, tan δ at -40° C. is preferably 0.600 or less in actual use.

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Abstract

The purpose of the invention is to provide a rubber composition for a conveyor belt, the rubber composition allowing significant reductions in power consumption at low temperatures when the conveyor belt has been formed. The purpose of the invention is also to provide a conveyor belt. This rubber composition for a conveyor belt 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 m2 / g or lower, the total content of the butadiene rubber and the styrene-butadiene rubber being 50 mass% or higher relative to the rubber component, the content of the carbon black being 30-50 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 and the content of the vulcanization accelerator being 1.5 or lower.

Description

technical field [0001] The present invention relates to a rubber composition for conveyor belts suitable for conveyor belts for cold regions, and a conveyor belt. Background technique [0002] Conveyor belts are often used for the transportation of materials, etc., but with the increase in the amount of conveying and the improvement of conveying efficiency, people require larger and stronger conveyor belts. In recent years, conveyor belts with a total length of several kilometers have appeared. bring. [0003] Therefore, the cost of equipment and power consumption will increase sharply, and people are demanding low-cost and power-saving belt conveyor systems. Cost reduction and power saving. [0004] Among them, Claim 1 of Patent Document 1 discloses "a rubber composition for a conveyor belt comprising a rubber component composed of natural rubber (NR) and polybutadiene rubber (BR), carbon black, and the like." Patent Document 1 shows that by using such a rubber compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00B65G15/30B65G15/32C08K3/04C08K3/06
CPCC08L9/00B65G15/32C08K3/0025C08K3/04C08K3/06C08K5/0025C08K3/012C08L9/06C08J5/00C08K3/00B65G15/34
Inventor 笹熊英博末藤亮太郎宫岛纯侯刚
Owner THE YOKOHAMA RUBBER CO LTD
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