O-ring Rubber Seal Formula Design Principles
Oct 30, 2022
The formula design occupies an important position in the processing of rubber products. A reasonable formula design can ensure the excellent performance of the rubber seal, the good processing performance of the rubber compound and the low production cost.
To properly solve the problems of the production quality and service life of the O-shaped rubber sealing ring, the design of the compound formula is the key.
The rubber formulation is generally composed of raw rubber, vulcanization system, protection system, reinforcement system and softening system. The purpose of formula design is to seek the best combination of various components in order to obtain good comprehensive performance. The formula design should be based on the requirements of product use, in line with the principle of economy and practicality, reasonably select various raw materials and their dosages, and finally achieve the following goals:
(1) Meet the performance requirements of the sealing ring. It is impossible for any kind of raw rubber to be perfect. Through formula design and formula test, we strive to make the sealing ring have the best comprehensive performance.
(2) The processing technology of rubber compound has good performance. On the basis of satisfying the performance of the product, consider the processing performance of the rubber compound. Good processing performance facilitates the manufacture of rubber compounds and sealing rings to meet the needs of mass production.
(3) Under the premise of ensuring product quality, try to choose raw materials that are cheap, rich in sources, non-toxic or low-toxic, and stable in performance, so as to reduce costs, improve economic benefits, do not pollute the environment and ensure safe production.
Studies have shown that there is a correlation between the components of the rubber formulation and the vulcanizate and rubber compound. There is also a correlation between the properties of the final product depending on the properties of the vulcanizate. These related principles form the basic framework for the design of rubber formulations.
Rubber formulations can be divided into experimental formulations and practical formulations according to their uses. The test formula is generally to study or identify the relationship between a certain material and the properties of vulcanized rubber and compound rubber, and strive to be simple in composition. The practical formula mainly studies the relationship between the performance of the vulcanizate and the actual practical performance of the product and the technological performance of the compounding rubber. Although the research contents of the two are different, they are interrelated and inseparable. The formulating process of the practical formula is as follows: the environmental conditions of the product, the analysis of the manufacturing process, the selection of the rubber species and the various compounding agents that make up the formula, the composition test formula, the performance evaluation test, the component adjustment and improvement, and the expansion test to determine the practical formula.
