The oil-resistant rubber sheet produced with nitrile rubber or nitrile reclaimed rubber as the main raw material can be used in various oil applications. Choosing the appropriate nitrile rubber material and rationally designing the nitrile oil-resistant rubber sheet formula can improve the processing performance of the rubber sheet and improve the finished product. Quality and reducing the cost of raw materials are of great significance. In actual production, what issues should be paid attention to when choosing rubber materials for nitrile rubber sheets? What compounding agents are commonly used for nitrile oil-resistant rubber sheets?
1. Selection points of nitrile rubber
Nitrile rubber is a typical mineral oil resistant rubber. The higher the acrylonitrile content, the better the oil resistance of the nitrile rubber. The increase in acrylonitrile content will cause the heat resistance of the compound to decrease, so the oil-resistant 2YLYY422 rubber sheet that works at 150°C or above for a long time generally chooses hydrogenated nitrile rubber, fluorine rubber, silicon fluorine rubber, etc. The increase in acrylonitrile content will also cause the cold resistance of the rubber compound to decrease. In actual production, oil-resistant rubber sheet manufacturers should select nitrile rubber with appropriate acrylonitrile content according to the temperature of use of the rubber sheet.
2. Selection points of nitrile reclaimed rubber
The main raw materials of nitrile reclaimed rubber are waterlogged nitrile, waste nitrile rubber gloves, etc. The nitrile reclaimed rubber processed by pulverization, desulfurization, filtration, refining and other processes retains the basic performance characteristics of nitrile rubber and has oil resistance. Excellent, it can replace nitrile rubber to reduce the raw material cost of oil-resistant rubber sheet. When choosing nitrile reclaimed rubber for oil-resistant rubber sheets, rubber product manufacturers need to combine the mechanical strength of the rubber sheet and the acrylonitrile content of the original nitrile rubber to choose the appropriate nitrile reclaimed rubber, increase the dosage, ensure the quality, and reduce the cost.
3. Reference formula for nitrile rubber sheet
Nitrile rubber 100 parts, carbon black 40 parts, zinc oxide 5 parts, stearic acid 1.8 parts, sulfur 1.8 parts, accelerator 2.1 parts, antioxidant 1.5 parts, paraffin wax 0.8 parts, coumarone 12 parts, calcium carbonate 150 parts , 10 parts of rubber oil, total: 325 parts.
4. Raw and auxiliary materials for nitrile oil-resistant rubber sheet
For the nitrile rubber oil-resistant rubber sheet, choose nitrile rubber with medium acrylonitrile content or nitrile reclaimed rubber. When sulfur is used for vulcanization, the accelerator DM is generally used as the main accelerator, and a small amount of accelerator TMTD is used in conjunction. The oil-resistant rubber sheet reinforcement and filling system uses universal carbon black to give the finished rubber sheet a higher tensile stress, good processing performance, high resilience and flexibility. The filler can use light calcium and a small amount of heavy calcium together. It is more appropriate to choose engine oil in the softening system. Anti-aging system can use chemical anti-aging agent A and physical protective paraffin wax together.
When using nitrile reclaimed rubber in nitrile rubber sheets, rubber product manufacturers can use the above formula as a reference formula, and reasonably determine the amount of nitrile reclaimed rubber based on the rubber content and mechanical strength of the nitrile reclaimed rubber, and adjust the formula appropriately. Effectively reduce the cost of raw materials under the premise of ensuring quality.
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