Combined with the previous discussion about the advantages and disadvantages of talc in rubber applications, here is the professional English version: Advantages of Talc in Rubber 1. Relying on its inherent hydrophobic properties, talc can improve the impermeability and anti-swelling performance of rubber, enhance the aging resistance of rubber compounds. It balances reinforcing effect and processability, reduces the compound viscosity of rubber materials, increases the speed and quality of extrusion production, and alleviates mold expansion and shrinkage deformation issues. 2. It improves the profile stability of rubber products, enhances their tensile strength, shear strength and tear resistance, lowers the thermal expansion coefficient and permanent deformation rate of rubber, and optimizes the overall mechanical properties of finished products. 3. Talc has excellent thermal insulation and electrical insulation properties, which can boost the heat resistance and electrical insulation performance of rubber products, making it suitable for the production of special rubber items such as cable insulation layers. Disadvantages of Talc in Rubber 1. Talc has a relatively high oil absorption value, which will consume a large amount of plasticizers and rubber matrix in the rubber formula. If the addition ratio is too high, it will make the rubber compound harden, significantly reduce the processing fluidity, and increase the difficulty of mixing and molding. 2. Natural talc ore is often associated with asbestos. Unqualified talc products may contain residual carcinogenic asbestos fibers, which not only affects the safety of rubber products in use, but also violates relevant industry safety standards and brings compliance risks. 3. Talc itself has an extremely low Mohs hardness. Excessive addition will reduce the wear resistance of rubber products, making it unable to meet the usage requirements of high-wear rubber items. 4. Ordinary talc without surface modification has poor compatibility with the organic rubber matrix. It is prone to agglomeration in the rubber compound, forming stress concentration points inside the rubber product, which will instead reduce the impact resistance of the finished product.