Rubber sheet is a plate-shaped rubber product processed from rubber as the main raw material. According to the main performance, it can be divided into ordinary rubber sheet, acid and alkali resistant rubber sheet, oil resistant rubber sheet, conductive rubber sheet, flame retardant rubber sheet, and wear-resistant rubber sheet Wait. Among them, the conductive rubber sheet is generally processed and produced with nitrile rubber as the main raw material and acetylene carbon black. In actual production, proper amount of reclaimed tire rubber can be used in the nitrile conductive rubber sheet. Appropriate adjustment of the conductive rubber sheet containing reclaimed rubber can further optimize product performance while reducing costs.
1. Selection and dosage of reclaimed rubber
When using tire reclaimed rubber in nitrile rubber conductive rubber sheet to reduce the cost of raw materials, it is recommended to use tire tread reclaimed rubber, which has high effective rubber hydrocarbon content, high mechanical strength and relatively better elasticity. When nitrile rubber and tread reclaimed rubber 2YLYY714 are used together to prepare conductive rubber sheet, the two are used in a ratio of 1:1 to prepare low-cost conductive rubber sheet with better mechanical properties.
2. Conductive rubber sheet vulcanization system containing reclaimed rubber
Sulfur vulcanization is often used when preparing conductive rubber sheet from nitrile rubber/tread reclaimed rubber. The hardness, elongation at break, permanent deformation and tear strength of the vulcanized rubber are better. The higher the amount of sulfur, the higher the hardness of the nitrile rubber/tread reclaimed rubber vulcanizate, the lower the elongation at break, the reduction of permanent deformation, and the slightly improved conductivity. The amount is controlled at about 1% of the total amount of rubber. Appropriate. It is recommended to use the accelerator DM as the mainstay, and CZ as the supplementary sulfur to prepare the conductive rubber sheet containing reclaimed rubber. The amount of the accelerator should be controlled 1%-2% of the total amount of the rubber.
3. Conductive rubber sheet reinforcement system containing reclaimed rubber
When using nitrile rubber/tread reclaimed rubber and using rubber to prepare conductive rubber sheets, it is recommended to use acetylene carbon black with good conductivity and super wear-resistant carbon black for the reinforcement system. In actual production, the higher the amount of acetylene carbon black, the better the conductivity of the rubber compound; the amount of acetylene carbon black can be controlled 30%-40% of the total amount of rubber; the conductive rubber sheet formula can also be added with an appropriate amount of super supplement Strong agent.
4. Conductive rubber sheet softening system containing reclaimed rubber
When nitrile rubber and tread reclaimed rubber are used together to produce conductive rubber sheet, the softening and plasticizing system is recommended to use dibutyl phthalate, which has good compatibility with nitrile rubber. The price is relatively cheap and it is not easy to leak out of the surface of the product . When using oil, paraffin, petrolatum and other softeners with strong interpenetration with nitrile rubber, the surface of the semi-finished rubber compound and the finished product after vulcanization will easily ooze to form a film, which will seriously affect the conductive performance of the conductive rubber sheet, so it should be avoided; The amount of DOP is generally controlled 10%-20% of the total amount of rubber.
When using reclaimed rubber in nitrile rubber conductive rubber sheet to reduce production costs, rubber product manufacturers must reasonably control the amount of tread reclaimed rubber, appropriately adjust rubber product formulations, and effectively reduce costs while ensuring product quality.
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