1. Effect on rubber tensile properties
The greater the chemical activity of carbon black, the greater the amount of bonded rubber during mixing, which increases the Mooney viscosity of the compound, increases the die expansion rate and shrinkage rate of the semi-finished product during extrusion, and slows down the extrusion speed. The higher the tensile strength, tear strength and abrasion resistance of the vulcanized rubber.
2. Influence on the processing performance of rubber
N700 series carbon black can be filled into rubber in large quantities, and the processing performance of rubber is good. This kind of carbon black endows the rubber with high elongation, low heat generation, high elasticity and good aging resistance, increases the processing fluidity of the rubber, improves the bonding effect between the product and other materials, and improves the appearance quality of the product.
3. Influence on the tearing properties of rubber
The smaller the particle size of carbon black, the higher the tensile strength, tear strength, constant elongation stress, wear resistance, and hardness of the vulcanized rubber, the better the flex cracking resistance, and the lower the resilience and elongation at break. . However, if the particle size is too small, it will be difficult to disperse during mixing due to the large cohesion force between the particles and easy to agglomerate, which will reduce the plasticity and extrusion performance.
4. Effect on physical and mechanical properties of rubber
The degree of carbon black dispersion has a great influence on the physical and mechanical properties of the rubber compound. Carbon black that is not well dispersed will cause the rubber to break easily and be difficult to shape. Carbon black is beneficial to the adjustment of rubber properties and can change its comprehensive mechanical properties and physical and chemical properties.
5. Effect on rubber reinforcement performance
Carbon black is the most commonly used reinforcing filler. Carbon black is added to many rubber products to improve the reinforcing performance of the product.
6. Effect on rubber resistance performance
When the carbon black content is 35% and the copper powder content is 30%, the resistance of the conductive silicone rubber is the smallest, and the stability of the piezoresistive properties of the conductive silicone rubber is very good; as the pressure increases, the resistance relaxation time and relaxation amplitude Both decrease, and the resistance of conductive silicone rubber decreases gradually with the increase of copper powder fineness.
The impact of carbon black on rubber is comprehensive, not only on the various properties of rubber but also on the density of rubber, and different carbon blacks have different effects on rubber. It can be said that what type of carbon is added to rubber products Black is a systemic problem that requires professional engineers to adjust accordingly. If you have any questions, welcome to contact us. Linde Polymer will give you a professional answer!
