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What is the role of fillers in rubber seal products

Release time:

2019-04-24 12:30

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What is the role of fillers in rubber seal products?
What is the role of filler in rubber seal products? Rubber seal products industry uses a large number of fillers as compounding agents, and its reinforcing fillers are used in rubber, which can not only improve the strength of rubber products, but also improve the processing performance of rubber materials,
The processed rubber material gives good wear resistance, tear resistance, heat resistance, cold resistance, oil resistance and other properties, which can extend the service life of the product.
Non-reinforcing filler for rubber, mainly from the role of filling capacity, some varieties also have the role of isolation, demoulding or coloring.
What are the requirements for the amount of 1. filler used in rubber seal products? Filler is the raw material second only to rubber and synthetic rubber.
In the seal product formulation, if the amount of synthetic raw rubber is 100, the amount of reinforcing filler is about 50, and the amount of non-reinforcing filler is about 25, which is the sum of all kinds of rubber products.
Taking the main product formula as an example, specific to each product, some fillers even exceed rubber, and some are lower than the total average amount.
2., therefore, what are the requirements of rubber seal products for fillers? 1. Generally, the surface of reinforcing filler particles should have strong chemistry, and the mechanical properties, aging resistance and adhesion properties of vulcanized rubber should be improved.
The surface of non-reinforcing filler particles is chemically inert, and does not produce chemical combination with rubber, and does not affect the mechanical properties and weather resistance, acid and alkali resistance and water resistance of vulcanized rubber;
2, not volatile, odorless, tasteless, has good storage stability; 3, for white, light color and color rubber products filler, but also requires no pollution, no discoloration;
4, has a high chemical purity, fineness to be uniform, the rubber has good wettability and dispersion.
What are the performance requirements for the use of 3. fillers in rubber seal products?
1. Generally speaking, the finer the reinforcing filler particles, the larger the specific surface area, the larger the contact area with the rubber, and the better the effect.
2, particle shape and crystal type, filler particle shape to spherical better, sheet or needle shaped filler in vulcanized rubber stretching is easy to produce directional arrangement, resulting in increased deformation, tear resistance performance decreased. Rubber products with good wear resistance and tear resistance are required, and it is not suitable to use non-axial crystalline materials as reinforcing fillers.
3. The powder filler with surface properties is mixed with rubber, and its particles are surrounded by rubber molecules. The degree of wetting of the particle surface by rubber has a great influence on the performance. Not easy to wet particles, in the rubber is not easy to disperse, easy to agglomerate, reduce its effectiveness.
This situation can be improved by adding certain substances that help to increase wetting. For example, the efficiency of very small calcium carbonate, after adding fatty acids, reduce the surface tension, increase the degree of wetting, improve the effect"

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