Rubber-plastic blending materials can maintain the unique characteristics of rubber and plastics, and achieve complementary performance. Among them, nitrile reclaimed rubber can be used as a replacement material for high-priced nitrile rubber, and can be used together with plastic to produce rubber-plastic oil-resistant rubber sheets. So in actual production, which plastics can be blended with nitrile reclaimed rubber? Is it purely using nitrile reclaimed rubber or is it combined with nitrile rubber? What problems should be paid attention to when producing nitrile reclaimed rubber/plastic blends to produce oil resistant rubber sheets1JLYY1017?
1. Nitrile reclaimed rubber can be blended with PVC material to produce oil resistant rubber sheet
PVC, namely polyvinyl chloride, is a polymer obtained by polymerizing a polyethylene monomer according to a free radical polymerization mechanism under specific conditions. It has light texture, acid resistance, alkali resistance, chemical corrosion resistance, high mechanical strength and excellent electrical insulation properties. Improve the mechanical strength, oil resistance and vulcanization properties of nitrile rubber. When nitrile reclaimed rubber replaces nitrile rubber and PVC to produce oil-resistant rubber sheet, it can not only reduce the cost of raw materials, but also solve the problem that the surface of nitrile rubber/PVC material film is not smooth and the mixing is easy to take off.
2. Nitrile reclaimed rubber can be blended with PE material to produce oil resistant rubber sheet
PE material is a kind of thermoplastic resin obtained by polymerization of ethylene. Low density polyethylene has low density, soft material and good chemical stability. It is not affected by the rubber in the oil resistant rubber sheet with nitrile rubber as the main material. The oil resistance of the board can significantly improve the low temperature performance of the rubber compound. When blending nitrile rubber with low-density polyethylene to prepare oil-resistant rubber sheet, it will also cause the problem that the rubber compound is easy to be rolled off. At this time, the nitrile rubber is replaced by nitrile reclaimed rubber, and an appropriate amount of rosin and terpene resin is used. , phenolic resin, coumarone and other tackifiers can solve this problem.
3. Problems needing attention when preparing nitrile reclaimed rubber and plastic to prepare oil resistant rubber sheet
In actual production, rubber and plastic blending will inevitably have some unavoidable problems. For example, when nitrile rubber or nitrile reclaimed rubber is blended with some low-density polyethylene, the hardness of the rubber will increase, which requires rubber products. The manufacturer appropriately increases the amount of softener or plasticizer. Experiments show that adding 3-5 parts of softening plasticizer to 10 parts of low-density polyethylene can eliminate the problem of increased hardness of the rubber caused by low-density polyethylene. Although the nitrile reclaimed rubber can improve the problem of easy roll-off during the kneading of the nitrile rubber/plastic blend material, it cannot solve the problem fundamentally, and it is necessary for the rubber product manufacturer to use the tackifier according to the actual demand.
In actual production, when the nitrile reclaimed rubber is blended with PVC, the sulfur/accelerator or sulfur/peroxide/accelerator vulcanization system is selected, and the amount of PVC in the formulation is adjusted reasonably. If necessary, some nitrile rubber can be combined with The nitrile reclaimed rubber is used together to reduce the production cost of the oil resistant rubber sheet while ensuring the mechanical strength and service life of the oil resistant rubber sheet.