Nitrile reclaimed rubber is made from waste nitrile rubber or used nitrile rubber products (nitrile gloves, oil seals, etc.) as raw materials. It retains the excellent oil resistance, good wear resistance, and heat resistance of nitrile rubber, and can fully or partially replace nitrile rubber to produce oil-resistant and wear-resistant rubber products, thereby reducing costs. Rubber sealing rings are ring-shaped sealing elements made mainly from natural rubber or synthetic rubber. Can nitrile reclaimed rubber be used? Which rubber sealing rings can use nitrile reclaimed rubber?
1. Feasibility analysis of producing rubber sealing rings with nitrile reclaimed rubber
From a performance perspective, rubber sealing rings mainly utilize the elasticity, resilience, and compressibility of rubber to achieve static or dynamic sealing. Nitrile reclaimed rubber possesses the elasticity and resilience of rubber material and meets the basic requirements of E5LYY924 rubber sealing rings; it can also resist the corrosion of oil-based media, has good wear and aging resistance, retains the core advantages of nitrile rubber, and has good compatibility with nitrile rubber. It can be used alone or in combination with nitrile rubber to produce rubber sealing rings. From a cost perspective, nitrile reclaimed rubber, as desulfurized recycled rubber derived from waste rubber, is much cheaper than virgin nitrile rubber. It has better plasticity, fluidity, and stability in finished dimensions than virgin rubber. Using it to produce rubber sealing rings can effectively reduce raw material costs, improve rubber processing performance, reduce production energy consumption, and increase yield.
2. Application of nitrile reclaimed rubber in common rubber sealing rings
(1) Rubber O-rings
O-ring rubber sealing rings are widely used in the static and dynamic sealing of hydraulic and pneumatic systems in various machinery, or for rotating shafts and vacuum seals. They require rubber with good elasticity, resilience, sufficient tensile strength, tear resistance, and medium resistance. Nitrile reclaimed rubber has good oil resistance and can be used alone or in combination with nitrile rubber or neoprene to produce oil-resistant O-rings of different hardness. It can be used for long periods at relatively high temperatures or in oil media while maintaining good sealing performance.
(2) Oil seals
Oil seals, also known as rotary shaft lip seals, are mainly used to seal the rotating shafts of various machines, preventing lubricant from leaking from moving parts and preventing external dust, sand, and other impurities from entering the machine. They require rubber with good oil resistance, wear resistance, and heat resistance. Nitrile reclaimed rubber can be used with nitrile rubber or neoprene to produce oil seals, effectively reducing cost while ensuring performance.
(3) Pipe joint sealing rings
Pipe joint sealing rings are ring-shaped rubber elements installed at pipeline connections, mainly used to fill gaps, prevent the leakage of media (liquid or gas), or prevent external impurities from entering. They require good elasticity, resilience, medium resistance, temperature resistance, and aging resistance, usually made from nitrile rubber, EPDM (ethylene propylene diene monomer rubber), or neoprene. Nitrile reclaimed rubber can fully or partially replace virgin nitrile rubber for producing pipeline joint sealing rings, reducing cost.
Nitrile reclaimed rubber has broad applications in rubber sealing rings. The methods and amounts of use vary significantly depending on different applications. Rubber product manufacturers must use it with caution. We will continue to share with you the key points of formulation design for producing rubber sealing rings with nitrile reclaimed rubber and low-cost vulcanization formulas.
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