Pioneering innovations in rubber vulcanization processes to drive quality upgrades in high-end rubber products.
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Release time:
May 28,2026
Rubber vulcanization is a core process in the rubber industry. At its essence, it involves chemical crosslinking that transforms linear raw rubber molecular chains into a three-dimensional network structure, fundamentally enhancing the material’s elasticity, strength, heat resistance, and aging resistance, while imparting stable shape and practical performance to finished products. Raw rubber that has not been vulcanized is prone to deformation and degradation, whereas vulcanized rubber can meet the stringent demands of diverse applications, making it an essential polymer material in modern industry.
Currently, the vulcanization system has evolved into a dual-track development pattern, with sulfur-based vulcanization and non-sulfur-based vulcanization coexisting. Traditional sulfur-based vulcanization is low-cost and well-established, making it widely used in conventional products such as tires, sealing rings, and rubber footwear. In contrast, non-sulfur systems—such as peroxide- and metal oxide–based formulations—offer superior heat resistance and stability, dominating high‑end heat‑resistant applications like silicone rubber, fluororubber, and EPDM rubber, and catering to specialized fields such as high‑temperature automotive seals and aerospace vibration damping.
The quality of vulcanization hinges on the coordinated control of three key parameters: temperature, time, and pressure. For every 10°C increase in temperature, the reaction rate typically doubles or triples; the curing time must be tailored to the formulation and wall thickness to prevent under‑curing or over‑curing; and adequate pressure ensures thorough mold filling and minimizes defects. For high‑end products, a secondary vulcanization step is often required to optimize crosslinking, remove impurities, and relieve internal stresses, thereby enhancing resistance to thermal aging and reducing permanent compression set.
The industry has established a comprehensive, end-to-end defect prevention and control system. By implementing formulation management, equipment calibration, mold optimization, and intelligent monitoring, it has created a closed-loop quality‑management framework that effectively reduces scrap rates. Looking ahead, vulcanization processes will evolve toward low‑temperature rapid curing, sulfur‑free environmentally friendly formulations, and smart, precision‑driven operations, driving the rubber industry from mass production to quality‑led development and supporting the high‑quality growth of new energy, advanced equipment, and the automotive sectors.
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