What are the functions of zinc oxide in rubber products?

2019-11-15

50% of industrially produced zinc oxide goes to the rubber industry. Zinc oxide and stearic acid, as important reactants in rubber vulcanization, are among the raw materials for rubber manufacturing. The mixture of zinc oxide and stearic acid enhances the hardness of the rubber. Zinc oxide is also an important additive in automobile tires. In addition to its vulcanizing effect, zinc oxide significantly improves the thermal conductivity of rubber, thus contributing to tire heat dissipation and ensuring driving safety. Zinc oxide additives also prevent the erosion of rubber by mold or ultraviolet light.

What are the functions of zinc oxide in rubber products? Let's have a brief introduction.

50% of industrially produced zinc oxide goes to the rubber industry. Zinc oxide and stearic acid, as important reactants in rubber vulcanization, are one of the raw materials for rubber manufacturing. The mixture of zinc oxide and stearic acid enhances the hardness of rubber. Zinc oxide is also an important additive in car tires. In addition to its vulcanization function, zinc oxide significantly improves the thermal conductivity of rubber, thus helping to dissipate heat from tires and ensuring driving safety. Zinc oxide additives also prevent the erosion of rubber by mildew or ultraviolet light.

⑴ Role of zinc oxide in the rubber tire industry (high-grade black and dark rubber tires, radial tires): Improves the thermal conductivity, wear resistance, tear resistance, tensile strength, and other indicators of the product, and can save about 30% of zinc oxide.

⑵ Role of zinc oxide in rubber products:

① Active zinc oxide is mainly used as a reinforcing agent for rubber to give rubber good corrosion resistance, tear resistance, elasticity, and elongation.

② Used as an accelerator in rubber vulcanization processes, it is a multifunctional rubber compounding agent, mainly used as a vulcanization activator and reinforcing agent for natural rubber, synthetic rubber, and latex.

③ When used as a vulcanization activator, it is evenly distributed in the rubber, has a large contact area with hydrogen sulfide, and has a greater chance of interfacial reaction. In addition, the active zinc oxide product has the catalytic effect of active substances, resulting in a high conversion rate of zinc oxide to zinc sulfide.

④ As a vulcanizing oxidant, its function is to enhance the activity of the accelerator, reduce the amount of accelerator, and shorten the vulcanization cycle.

⑤ It can accelerate the vulcanization speed, improve the thermal conductivity of the vulcanized rubber, and make the vulcanization more thorough.

⑥ In the rubber industry, especially in the production of transparent rubber products, active zinc oxide is an excellent vulcanization activator.

⑶ Role of zinc oxide in synthetic rubber: It acts as an activator, vulcanization accelerator, and reinforcing agent, and also has a coloring effect. It promotes the vulcanization, activation, reinforcement, and anti-aging of rubber, strengthens the vulcanization process, and improves the tear resistance and wear resistance of rubber products.

⑷ Role of zinc oxide in natural rubber: It acts as a vulcanization activator, promoting the vulcanization, activation, reinforcement, and anti-aging of rubber, strengthening the vulcanization process, and improving the tear resistance and wear resistance of rubber products.

⑸ Role of zinc oxide in natural latex: It acts as an activator, promoting the vulcanization, activation, reinforcement, and anti-aging of rubber, strengthening the vulcanization process, and improving the tear resistance and wear resistance of rubber products.

⑹ Role of zinc oxide in white latex: It acts as a colorant and filler.

⑺ Role of zinc oxide in chloroprene rubber: It acts as a vulcanizing agent and an additive that increases thermal conductivity.

⑻ Role of zinc oxide in the footwear industry (rubber shoes, rain boots, rubber gloves, etc.): Improves wear resistance and anti-aging, extending service life.

⑼ Role of zinc oxide in transparent rubber and food-grade rubber products: An indispensable inorganic activator.

⑽ Role of zinc oxide in transparent and translucent rubber: It acts as a vulcanization activator.

⑾ Role of zinc oxide in transparent or colored rubber products: It plays an irreplaceable role compared to traditional activators such as carbon black.

Shandong Xingyuan Zinc Industry Co., Ltd., after years of accumulation, has leading technical strength and outstanding contributions to the industry. Its products cover many fields, including rubber tires, zinc salts, surface treatment, fiberglass, soft magnetic materials, lightning arresters, voltage-sensitive resistors, ceramics, coatings and paints, cosmetics, feed, and compound fertilizers. The company has always adhered to the principle of technological progress leading industry development, constantly updating and upgrading product technology, focusing on clean production and energy conservation and environmental protection in equipment and processes. The main process technology indicators have reached the international advanced level.

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