Nitrile recycled rubber is recycled from waste nitrile rubber products such as nitrile gloves, which retains the excellent oil resistance, heat resistance and good elasticity of nitrile rubber, and can replace nitrile raw rubber in whole or in part to produce oil-resistant rubber products, effectively reducing the cost of raw materials, rubber gasket is one of them. Rubber gaskets are important sealing elements for pipeline connections and equipment seals in automobiles, machinery, chemicals, hydraulics and other industries.
1. Oil-resistant rubber gasket (pure rubber gasket)
Oil-resistant rubber gaskets need to be in long-term contact with oil media such as mineral oil, vegetable oil, hydraulic oil, etc., to maintain good sealing performance, and the rubber is required to have good oil resistance. The cyano in the molecular chain of nitrile recycled rubber has low compatibility with oil molecules, which can effectively prevent oil from deepening, and has excellent oil resistance, and can be used alone or with nitrile rubber in an appropriate proportion to produce oil-resistant rubber gaskets, such as hydraulic system oil tank sealing gaskets and gearbox end cap sealing gaskets, effectively reducing raw material costs.
70 parts of nitrile rubber, 30 parts of nitrile recycled rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of RD anti-aging agent, 45 parts of carbon black N774, 45 parts of light calcium carbonate, 20 parts of terracotta, 10 parts of talc, 28 parts of dioctyl phthalate, 1 part of accelerator CZ, 1.8 parts of accelerator TMTD, 0.6 parts of sulfur; Total 258.4 copies.
2. Heat-resistant rubber gasket (pure rubber gasket)
Heat-resistant rubber gaskets are generally used for a long time in an environment of 80°C-150°C, which requires the rubber to have good heat resistance and maintain structural stability and sealing performance within a certain temperature range. Nitrile recycled rubber E5LYY311 has good heat resistance and can be used with nitrile rubber to produce heat-resistant rubber gaskets, such as plate heat exchanger rubber sealing gaskets, to reduce production costs. If you want to further improve the heat resistance of nitrile recycled rubber gasket, you can add an appropriate amount of heat-resistant anti-aging agent and heat-resistant additives to meet the needs of medium temperature and heat resistance.
80 parts of nitrile rubber, 20 parts of nitrile recycled rubber, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of anti-aging agent RD, 75 parts of carbon black N774, 5 parts of triphenyl phosphate, 1 part of accelerator CZ, 2 parts of accelerator TMTD, 0.4 parts of sulfur, total: 191.4 parts.
3. Sponge rubber gasket
Sponge rubber gaskets have the characteristics of light texture, good elasticity, soft feel, oil resistance, heat resistance, etc., and are widely used in electronic equipment, furniture and other fields of cushioning and sealing. Nitrile recycled rubber has a moderate molecular weight distribution and good compatibility with blowing agents, and can be used alone or in combination with nitrile rubber to produce sponge rubber gaskets, effectively reducing the cost of raw materials. Nitrile recycled rubber can produce closed-cell or open-cell sponge gaskets with the cooperation of different varieties of vulcanizing agents, blowing agents, foaming auxiliaries, activators and other compounds, among which the closed-cell structure of nitrile recycled rubber sponge gasket has stronger sealing, and the sponge gasket of open-cell structure has better shock absorption.
75 parts of nitrile rubber, 25 parts of nitrile recycled rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 13 parts of carbon black N330, 40 parts of terracotta, 25 parts of light calcium carbonate, 15 parts of dioctyl phthalate, 5 parts of coumarone resin, 1 part of accelerator CZ, 0.6 parts of accelerator DM, 2 parts of sulfur, 6 parts of blowing agent H, 6 parts of urea; Total 220.6 copies. (Closed-cell sponge rubber gasket)
In actual production, the performance requirements of rubber gaskets in different usage scenarios are different, rubber gasket manufacturers can choose the appropriate indicators of nitrile recycled rubber according to the specific needs of the gasket, reasonably determine the proportion of recycled rubber mixing, appropriately adjust the production formula and production process parameters, and effectively reduce the cost of raw rubber and save labor and electricity under the premise of ensuring the performance of rubber gasket.
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