Rubber industry commonly uses inorganic fillers such as calcium carbonate, talc, clay, etc., to improve the functionality of some rubber products. While it improves some functionality, it also weakens some of the performance. But use of mica powder products in rubber products as multi-functional filler improves the overall performance. The rubber manufacturers who manufacture tyre, tape, rubber sheet, hose, automotive rubber accessories and other products use mica powder which has good processing performance and can replace 30-50% of the semi-reinforcing or other coarse particles like carbon black and can also improve the friction properties of products. For example: the use of wet ground mica powder can enhance the greenhouse vulcanized silicone rubber (RTV silicone rubber) tensile strength, elongation at break and other mechanical properties, while the process performance is also better. 

Performance of Mica powder used in rubber products is as follows:  

  • Greatly improves the strength of the product. Reinforcement effect can be achieved as close as to the level of silica.       
  • Mica can be used to improve the dimensional stability of products, resistance to stress cracking, and enhance the toughness of products, anti-aging, anti-cracking, and enhance the wear resistance of products.     
  • Has excellent acid and alkali resistance, at the same time it has flame retardant and corrosion resistance and other characteristics.   
  • To improve the heat resistance of products and reduce shrinkage. Mica powder can improve the products resistance to gas swelling.  
  • The insulation properties of mica powder can improve the electrical properties of rubber products.

    Plastic : Improve rigidity and heat-resistance, reduce warpage and shrinkage, provide vibration suppression and barriers

    Rubber : Improving hardness and heat-resistance, provide vibration suppression, improving heat-resistance and performance of mold release