Active Zinc Oxide is a zinc oxide product processed by special techniques, featuring high specific surface area and excellent surface activity. Compared with ordinary zinc oxide (specific surface area typically only 1–5 m²/g), active zinc oxide has a particle size as low as about 0.05 μm and a specific surface area reaching 35–55 m²/g or even higher. Its particles are spherical, offering better dispersibility and adsorption. As the most important inorganic vulcanization activator in the rubber industry, active zinc oxide significantly improves vulcanization efficiency and enhances the mechanical properties of vulcanizates.

Key Advantages
Compared with ordinary zinc oxide, active zinc oxide offers the following significant advantages in rubber formulations:

High specific surface area and small particle size – The particles are fine (can be as low as nanometer scale), with large specific surface area and outstanding surface activation effect, making it much more active than ordinary zinc oxide.

Improved vulcanization efficiency – The vulcanization promoting effect of zinc oxide depends on its surface activity and specific surface area. The fine particles and increased specific surface area of active zinc oxide give it extremely high vulcanization promotion efficiency, accelerating the rubber vulcanization reaction, increasing crosslink density, and helping to form a stable network structure.

Enhanced mechanical properties – Significantly improves the tensile strength, tear resistance and abrasion resistance of vulcanized rubber, and improves compression set performance.

Good dispersibility and transparency – The spherical particle structure allows uniform dispersion in the rubber compound, and its refractive index is close to that of natural rubber, which is beneficial for manufacturing transparent or light‑colored rubber products.

Porous structure and stable performance – The fine particles aggregate to form a porous spherical shape with good dispersibility. Vulcanized products containing active zinc oxide have good aging resistance and flex resistance, and are less likely to crack under bending.