Nitrile rubber can produce all kinds of oil-resistant rubber products such as oil-resistant rubber sheets, rubber boots, rubber pads, oil seals, sealing rings, etc.; Nitrile reclaimed rubber processed from waste nitrile rubber and waste nitrile rubber products can be used with nitrile rubber With the same performance characteristics, it can completely or partially replace nitrile rubber to produce oil-resistant products, reducing raw material costs. After mixing nitrile reclaimed rubber in the production of oil-resistant rubber products, the formula needs to be adjusted appropriately. The type and amount of the compounding agent in the formula should be adjusted in time according to the reclaimed rubber index and the addition ratio. Why?
1. The significance of adjusting the formula of oil-resistant rubber products mixed with reclaimed rubber
The excellent oil resistance and abrasion resistance of nitrile reclaimed rubber are basically the same as those of nitrile virgin rubber, which can directly replace nitrile virgin rubber to produce various rubber products to achieve the purpose of reducing costs. Since nitrile reclaimed rubber is a product of recycling and reuse of waste nitrile rubber products, it has undergone intensive treatment during the production process, and its mechanical strength has been lost to a certain extent. Compared with the original rubber, it needs to be improved by adjusting the formula. Mechanical strength of rubber products containing nitrile reclaimed rubber.
The composition of nitrile reclaimed rubber contains a certain amount of accelerators, reinforcing agents, antioxidants, etc. that have not been completely removed. When designing the nitrile rubber product formula, this part of the compounding agent needs to be calculated, otherwise it will affect the compounding agent 2YLYY412 in oil-resistant products. The effect of the effect. The amount of nitrile reclaimed rubber is different, and the physical properties of the oil-resistant rubber products obtained are different. Therefore, it is necessary to adjust the product formula at any time according to the amount of reclaimed rubber. The mechanical strength of reclaimed rubber changes in different seasons, and the formula needs to be fine-tuned.
2. Skills for adjusting the formula of oil-resistant rubber products mixed with reclaimed rubber
When using nitrile reclaimed rubber to reduce the raw material cost of oil-resistant rubber products, the performance of the product changes continuously with the increase in the amount of reclaimed rubber. Under normal circumstances, directly add about 10 parts of nitrile reclaimed rubber to the formula of nitrile oil-resistant products, the physical properties of the reclaimed rubber will basically remain unchanged, and the rubber content will slightly decrease; when the amount of nitrile reclaimed rubber is increased to 20 parts, the rubber The permanent deformation, hardness and other indicators of the material have changed, and the aging resistance of the vulcanized rubber is improved; the amount of reclaimed rubber is continued to increase, and the mechanical strength of oil-resistant products has decreased.
In actual production, rubber product manufacturers can appropriately increase the amount of high wear-resistant carbon black, or appropriately reduce the amount of plasticizer, which can significantly improve the mechanical strength of oil-resistant rubber products containing reclaimed rubber. For example, the amount of high wear-resistant carbon black in the nitrile pure rubber formula is 15 parts, and the plasticizer is about 15 parts. After adding 20 parts of nitrile reclaimed rubber, the amount of high wear-resistant carbon black in the formula can be increased by 5 parts, and the amount of plasticizers can be reduced 6 8 parts, the tensile strength and hardness of oil-resistant products will be significantly improved.
Reasonable use of nitrile reclaimed rubber in the formula of nitrile oil-resistant products, and appropriate adjustment of the formula according to the amount of reclaimed rubber, can not only reduce the raw material cost of rubber products, but also ensure the mechanical strength and oil resistance of the products, and it can also improve the resistance of rubber products to a certain extent. Aging performance and scorch resistance.
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