Nitrile rubber has excellent oil resistance, high tensile strength, heat resistance, wear resistance and tear resistance, which is an ideal raw material for the production of oil-resistant rubber sealing strips. However, the price of nitrile rubber is high and the processing is difficult, so many manufacturers want to use some low-cost raw materials to replace nitrile rubber to produce oil-resistant sealing strips, so as to reduce costs and improve the processing performance of rubber compounds on the premise of ensuring the oil resistance of sealing strips. What low-cost raw materials can replace nitrile rubber to produce oil-resistant rubber sealing strips?
1. Sub-brand nitrile rubber
Sub-brand nitrile butadiene rubber is a secondary product in the production process of nitrile rubber, with the basic performance characteristics of nitrile rubber, excellent oil resistance, good wear resistance, heat resistance, good compatibility with nitrile rubber, can replace all or part of the genuine nitrile rubber to produce oil-resistant rubber sealing strips, effectively reduce the cost of rubber.
Nitrile rubber/sub-brand nitrile rubber combined with the production of oil-resistant sealing strip vulcanization formula: 50 parts of nitrile rubber, 50 parts of nitrile reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant A, 50 parts of antioxidant N774, 65 parts of light calcium carbonate, 15 parts of dibutyl phthalate, 5 parts of white oil, 0.3 parts of accelerator D, 1.2 parts of accelerator DM, 2 parts of sulfur; Total 245.5 copies.
2. Nitrile recycled rubber
Nitrile reclaimed rubber is made of waste nitrile rubber products and their vulcanized rubber edge rubber wool as raw materials, processed by crushing, desulfurization, kneading, and lower filming, which retains the basic properties E4LYY827 of nitrile rubber material, large oil resistance, wear resistance, heat resistance, aging resistance, and can be used alone or combined with nitrile rubber in an appropriate proportion to produce oil-resistant sealing strips, which can effectively reduce the cost of raw rubber under the premise of ensuring the oil resistance of the finished rubber strips.
Compared with nitrile rubber, nitrile reclaimed rubber has better plasticity and fluidity, the compounding agent is easy to disperse evenly, and its expansion and contraction are much smaller than that of new rubber when processing with non-vulcanized rubber of reclaimed rubber, and the shape and size of the finished product are more stable; The appropriate amount of nitrile reclaimed rubber is mixed with nitrile reclaimed rubber in the production of oil-resistant sealing strips from nitrile rubber, which can not only reduce the cost of raw materials, but also improve the processing performance of rubber compounds.
Nitrile rubber/nitrile reclaimed rubber combined with the production of oil-resistant sealing strip vulcanization formula: 60 parts of nitrile rubber, 40 parts of Hongyun 75% oil-resistant nitrile reclaimed rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 1 part of antioxidant A, 0.5 parts of paraffin, 50 parts of carbon black N774, 13 parts of clay, 9 parts of magnesium carbonate, 50 parts of light calcium carbonate, 5 parts of white oil, 13 parts of black ointment, 0.3 parts of accelerator D, 1.2 parts of accelerator DM, 2 parts of sulfur; A total of 252 copies.
3.PVC material
PVC, i.e., polyvinyl chloride, is a thermoplastic resin generated by the free radical polymerization reaction of vinyl chloride monomer VCM, which has stable physical, chemical and mechanical properties, and the price is about 1/3 of nitrile rubber; The finished product of oil-resistant sealing strip has good wear-resistant, heat-resistant and chemical-resistant properties; The addition of PVC can improve the elasticity and flexibility of nitrile rubber to a certain extent, so that the sealing strip is not easy to deform and crack during use, and has stronger adaptability.
In order to further reduce the production cost of oil-resistant rubber sealing strips, rubber sealing strip manufacturers can also blend sub-brand nitrile rubber, nitrile reclaimed rubber and PVC.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits