Reasonable use of recycled tire rubber in natural rubber belt can not only effectively reduce the cost of raw materials, but also improve the processing performance of rubber compound and the aging resistance of finished products. In the actual production, a certain proportion of reclaimed tire rubber can be used in the belt covering rubber and rubber rubbing. The amount of reclaimed tire rubber in different parts of the belt is different, and the type and amount of compounding agent in each compounding system are also different7LYY202Y.
1. Reference formula for covering rubber of conveyor belt with reclaimed rubber
80 phr natural rubber, 40 phr recycled rubber, 5 phr zinc oxide, 2 phr stearic acid, 2 phr pine tar, 1 phr plasticizer, 1 phr antioxidant, 30 phr carbon black, 1 phr accelerator and 2.5 phr sulfur; Total: 164.5 copies.
2. Reference formula of belt rubbed with reclaimed rubber
60 parts of natural rubber, 80 parts of reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of pine tar, 1 part of plasticizer, 1 part of antioxidant, 30 parts of carbon black, 1 part of accelerator and 2 parts of sulfur; Total: 183.
3. Selection of raw and auxiliary materials for each rubber layer of conveyor belt with reclaimed rubber
When using recycled tire rubber to reduce the production cost of conveyor belt, choosing recycled tire tread with relatively high content of effective rubber hydrocarbon can better improve the tensile strength, tear strength, flex resistance and aging resistance of cover and rub rubber of conveyor belt. DM and Tet are selected as the vulcanization system to coordinate the vulcanization effect and speed and improve the mechanical strength of each rubber layer. The reinforcement system uses high wear-resistant carbon black, such as N330, which can effectively improve the mechanical strength, tear strength and wear resistance of the conveyor belt.
Using antioxidant a or D, or both, in NR / RR blends can improve the resistance of belt covering compound to various aging factors, and significantly improve the aging resistance of belt covering compound and rubbers; If necessary, 0.5-1 part paraffin can be added to further extend the service life of the conveyor belt.
In order to reduce the cost of raw materials by using recycled tire rubber in each rubber layer of conveyor belt, the rubber product manufacturers should reasonably determine the amount of recycled tire rubber according to the characteristics of each rubber layer and various indicators of recycled tire rubber, and properly adjust the formula of rubber products, so that "quality" and "cost" can be achieved at the same time. In the actual production, rubber products manufacturers can also choose to add styrene butadiene rubber or cis-1,4-polybutadiene rubber to the NR / RR blend to further improve the physical properties of each rubber layer of the conveyor belt. After that, we will discuss with you about the future.
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