Wear resistant hose It is a kind of material conveying pipe. Usually, black is mainly wrapped with outer rubber packing belt, and steel wire is used between the inner and outer rubber to apply negative pressure conditions. In addition to reducing the cost, adding some recycled tire rubber in the production of medium and low-grade wear-resistant rubber hose can also improve the bending resistance of the hose itself. The quality of wear-resistant rubber hose is largely due to the quality of the inner wall rubber, The wear resistance coefficient of the wear-resistant hose mixed with 20 phr of recycled tire rubber is about 0.045, and the cost price is reduced by 8%. Let's introduce Shandong wear-resistant hose Inner wall glue formula.

Natural rubber, styrene butadiene rubber and cis-1,4-polybutadiene rubber are generally selected as the inner wall rubber (nitrile rubber, butyl rubber or polyurethane rubber can be selected as the high abrasion resistant hose - this article will not be extended). Because the original intention of tire design is high hardness and abrasion resistance, the raw materials used are also similar to the inner wall rubber, and some of them are mixed with recycled tire rubber, which is an appropriate choice to reduce the cost of inner wall rubber.

1. Vulcanization. If three kinds of rubber are used together, 30% natural rubber, 70% styrene butadiene cis-1,4-polybutadiene rubber, sulfur consumption is 1.5-2.5 parts, MDMCZ can be used as accelerator, 2-3 parts can be used; If the proportion of styrene butadiene cis-1,4-polybutadiene rubber increases, the sulfur should be reduced and the amount of accelerator should be increased; If 20 parts of recycled tire rubber are added, 0.1 parts of sulfur and 0.15-0.2 parts of accelerator shall be added.

2. Reinforcement. The reinforcing agent can be HAF fine particle structure high wear-resistant furnace black, or it can be used together with SRF semi reinforcing furnace black, with the amount of 30-50 phr; If the amount of cis-1,4-polybutadiene rubber in the formula increases, the breaking elongation and wear resistance of the inner wall rubber can be significantly improved.

3. Filler. Inorganic fillers such as calcium carbonate and clay shall be selected first, and the amount shall be determined according to the quality requirements, generally not more than 30 portions.

4. Softening plasticizer. Liquid softener can use pine tar or engine oil, 10-20 parts; Solid softener Gumarone or asphalt 5-10 parts, if Shandong wear-resistant hose has high quality requirements, only solid Gumarone can be used.

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