When using fiber bone to improve the mechanical strength of natural rubber / reclaimed rubber, with the continuous increase of the amount of short fiber, there are different changes in the tensile strength, elongation at break, tear strength, resilience and wear resistance of the rubber. Therefore, when improving a single index, it is necessary to comprehensively consider the changes of other mechanical properties. In addition, the addition of fiber skeleton will also affect the vulcanization and aging resistance of natural rubber / 7lyy232y reclaimed rubber. Xiaobian will continue to discuss with you today.
3. Effect of short fiber on processability of NR / RR blends
In actual production, when short fiber is used to improve the mechanical strength of natural rubber / reclaimed rubber blend, the vulcanization time of blend will decrease with the increase of short fiber content; In other words, the use of short fibers can improve the vulcanization rate of natural rubber / reclaimed rubber. However, with the increase of the amount of fiber skeleton, the matrix in the compound will be more restrained, which will have a negative effect on the processing, so the amount of fiber should not be too high.
4. Effect of short fiber on aging resistance of NR / RR blends
When short fiber reinforced NR / RR blends, the reinforcement effect of longitudinal fiber was better than that of transverse fiber. The elongation at break of blends reinforced by longitudinal fiber had little change after aging, and the elongation at break in longitudinal direction was higher than that in transverse direction. Compared with natural rubber, the rubber hydrocarbon of reclaimed rubber processed through several intense processes has been in a stable state and has better aging resistance. Therefore, the aging resistance of NR / NR blends is due to the aging resistance of pure Nr.
At present, polyester fiber, aramid fiber, nylon fiber and cotton fiber are commonly used in the production of rubber products. Nylon fiber is nylon fiber, which has high strength, high elongation at break, good elasticity, flexing resistance and wear resistance, and is widely used in the production of bias tire products. When using natural rubber / reclaimed rubber and rubber to prepare tire tread, rubber pipe, rubber V-belt, conveyor belt, seal and other products, nylon short fiber can be used for reinforcement.
The combination of recycled rubber and high priced natural rubber has become the mainstream way of rubber product production. The finished product has good comprehensive performance, low cost and higher cost performance. When preparing various rubber products with natural rubber / recycled rubber, selecting appropriate short fiber skeleton materials, comprehensively considering the influence of fiber materials on the mechanical properties, vulcanization properties and aging resistance of the rubber, and reasonably controlling the amount of short fiber can further improve the comprehensive index of rubber products and improve the market competitiveness.
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