Silica has a certain reinforcing performance, which can replace carbon black to reinforce the rubber compound, especially in white, light-colored and colored rubber products, which can improve the overall performance of the tire and prolong the service life of the tire And so on, what role does rubber silica have in tires?
1. Reinforcement: The rubber compound reinforced with silica can resist tearing. Adding silica to large-scale tire tread rubber can improve the performance of anti-cutting cracks, but attention should be paid to the reasonable dosage. Otherwise, the effect will be counterproductive.
2. Adhesion: The active silanol on the surface of silica is an important component of the m-methyl white adhesive system, which can improve the adhesive strength between rubber and skeleton materials.
In a word, adding rubber silica to tires can significantly improve various performances of tires, especially in terms of tire wear resistance and rolling resistance.
The addition of silica to tires also has disadvantages: when silica is used to reinforce rubber tires, it has poor affinity with rubber and is easy to agglomerate, which makes the dispersion during mixing worse and delays vulcanization.
Tips for using rubber silica:
It is recommended to use silane coupling agent to modify the silica, change its hydrophilicity to hydrophobicity, and further improve the reinforcing performance. Using silane coupling agent to modify silica in tire tread, the tear resistance and wear resistance of tread rubber are obviously improved. In the actual production process, the reinforcing performance of silane coupling agent modified silica in vulcanizate is close to that of carbon black.