The cause of rubber blooming phenomenon and the influence
Blooming phenomenon, is a common quality problem in rubber processing. It refers to the phenomenon that unvulcanized rubber or compounding agents contained in vulcanized rubber migrate to the surface and precipitate. There are three types of spraying: powder spraying, wax spraying, and oil spraying.
Blooming has the following effects on rubber:
1. Blooming affects the apparent quality of products; it makes the surface of rubber products appear white, yellow, gray, etc., and sometimes bright spots appear to make the surface lose luster.
2. Blooming affects the performance of rubber; it will reduce the self-adhesiveness of the rubber, affect the adhesion of the rubber to fiber materials and metal materials, and cause difficulties in molding.
3. If the main components of the Blooming are vulcanizing agents and accelerators, it will increase the concentration of vulcanizing agents and accelerators on the surface of the rubber. During storage and processing, the rubber will scorch, which will cause the degree of vulcanization of the vulcanized rubber to be poor. In both cases, the physical and mechanical properties are degraded.
To solve the Blooming problem, we must first find out the reason for the rubber frosting, and give different solutions according to different reasons. The solubility of the same accelerator in different rubbers is different; the solubility of different accelerators in the same rubber is also very different. Adding accelerators after lowering the temperature of the rubber compound is conducive to uniform mixing. Fully vulcanized vulcanized rubber greatly reduces the risk of blooming. For the blooming caused by improper compounding of the compounding agent, it is enough to reduce the amount of the compounding agent appropriately.
GJ Bush Factory pays special attention to the rubber formula and vulcanization time when producing rubber bushings and rubber pads to prevent blooming from affecting the use of products.
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The cause of rubber blooming phenomenon and the influence
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