Function of Magnesium Oxide in Tire and Matters Needing Attention

Lightweight magnesium oxide is an odorless, tasteless, and non-toxic white powder with a loose, amorphous structure. This material occupies roughly three times the volume of heavy magnesium oxide and is an essential inorganic compound.

As society advances, the demand for various types of tires has expanded significantly. Beyond traditional bicycle, car, and agricultural vehicle tires, there is now a need for tires in products like strollers, toy cars, and balance bikes. Each application has unique requirements, often fulfilled by adding lightweight magnesium oxide as a key material.

Understanding Lightweight Magnesium Oxide

Lightweight magnesium oxide is an odorless, tasteless, and non-toxic white powder with a loose, amorphous structure. This material occupies roughly three times the volume of heavy magnesium oxide and is an essential inorganic compound. Due to its versatile properties, lightweight magnesium oxide is widely used in industries such as tire manufacturing, rubber, ceramics, construction materials, metallurgy, chemicals, food, and pharmaceuticals.

The Role of Lightweight Magnesium Oxide in Tire Manufacturing

Adding lightweight magnesium oxide in tire production offers multiple benefits: it acts as a coking agent, vulcanization accelerator, acid absorbent, filler, and provides heat resistance, fire retardance, and corrosion resistance. Its inherent activity also enhances product quality by extending coking time, improving flexibility, and increasing abrasion resistance. Additionally, lightweight magnesium oxide helps to precisely control rubber content and adhesive properties, enhancing the rubber's physical characteristics, tensile strength, dynamic compression, and heat management. This reduces quality issues, helping prevent tire blowouts or separation from the hub during high-speed or heavy-load conditions.

Precautions for Using Lightweight Magnesium Oxide

When using lightweight magnesium oxide, attention to several key details is essential. First, ensure proper moisture control, as damp magnesium oxide can lead to increased insoluble hydrochloric acid content and water-soluble impurities, potentially causing blistering issues. Additionally, low magnesium oxide content can negatively impact toughness and abrasion resistance, while high calcium content may lead to fractures. If the amount of magnesium oxide added is insufficient, increased crosslinking density may reduce scorch time and positive vulcanization time, affecting the product's tensile strength, fixed tensile stress, hardness, and elongation rate. Careful selection and storage of magnesium oxide are therefore critical!