What Are The Applications Of Micro Silica Powder (Silica Fume) In The Rubber Industry?

Ewende Micro Silica Powder (Silica Fume) has the following applications in the rubber industry:

1. Improve the mechanical properties of rubber:

- Enhance the strength and hardness: micro-silica powder has a high specific surface area and high activity, and can interact with the molecules in the rubber. Adding the right amount of micro silica powder in rubber can increase the cross-linking density between the rubber molecules, thus improving the strength and hardness of rubber products, so that they can withstand greater external forces and pressures. For example, in some rubber products that require high strength, such as rubber conveyor belts, rubber seals, etc., the addition of micro silica powder can significantly improve its strength and hardness, and extend the service life.

- Improvement of abrasion resistance: micro-silica powder has high hardness and regular particle shape, which plays the role of filling and strengthening in rubber. It is evenly dispersed in the rubber matrix, which can effectively reduce the wear and tear of rubber products in the process of use, and improve the wear resistance and durability of rubber products. Like rubber tires, rubber soles and other rubber products that are often subject to friction, the addition of micro-silica powder can significantly improve its wear resistance and reduce the wear rate.

2. Improve the aging resistance of rubber:

- Formation of chemical bonds to enhance stability: micro silica powder can form chemical bonds with the polymers in rubber, making the molecular structure of rubber more stable, thus improving the aging resistance of rubber products. In the process of long-term use, rubber products are easily affected by oxygen, ultraviolet rays, heat and other factors and aging, resulting in performance degradation. The addition of micro-silica powder can enhance the anti-aging ability of rubber and prolong the service life of rubber products.

- Absorb ultraviolet rays: Micro silica powder can absorb ultraviolet rays and reduce the damage of ultraviolet rays to rubber molecules. This is especially important for rubber products that are exposed to the outdoor environment for a long time, such as rubber pipes, rubber waterproofing rolls, etc. The addition of micro silica powder can improve their weather resistance and prevent aging and performance degradation due to ultraviolet radiation.

3. Improve the processing performance of rubber:

- Reducing viscosity and stickiness: micro silica powder can reduce the viscosity and stickiness of rubber and improve its fluidity. During rubber processing, this helps the rubber to fill the molds better, improving productivity and product quality. For example, in rubber extrusion molding and injection molding processes, adding micro silica powder can make rubber easier to extrude and inject, reducing energy consumption and scrap rate during processing.

- Improve dispersibility: micro-silica powder has fine particles, large specific surface area and good dispersibility in rubber. It can make all kinds of additives in rubber evenly dispersed and improve the performance stability of rubber products. At the same time, good dispersion is also conducive to improving the compatibility of rubber and other materials, such as rubber and fiber, metal and other materials in the composite products, micro-silica powder can improve the combination of rubber and other materials.

4. Applied to specific rubber products:

- Wear-resistant rubber products: including rubber sheets, pipes, belts, rolls and so on. Mixed rubber filled with micro silica powder has the unique properties of thin rubber, good permeability, good dispersion, strong adhesion, etc., which is conducive to the mixed rubber rubbing on the canvas, enhancing the adhesive strength between the film and the canvas, and the mechanical properties of the products such as tearing strength and permanent deformation have been significantly improved.

- Silicone rubber products: micro-silica powder in silicone rubber products, when applied, has a very low water content and very good insulating properties, its maximum particle size of less than 5μm, has a certain reinforcing properties, can improve the strength and electrical properties of silicone rubber products.