Mixing appropriate amount of butyl rubber in EPDM rubber can not only improve the air tightness and damping performance of rubber products, but also alleviate the problem of aging, hardening and brittleness of rubber products, and extend the service life of rubber products. In order to further reduce the production cost of EPDM products, many rubber product manufacturers expect to use butyl reclaimed rubber in the formulation of EPDM products. Is it feasible? If so, how effective? How much butyl reclaimed rubber is better?
1. Butyl recycled rubber and EPDM rubber
The solubility of butyl rubber and EPDM rubber is close, the polarity and unsaturation are very small, and it has thermodynamic compatibility. When the two are used together, the vulcanization can be easily achieved through appropriate adjustments. Butyl reclaimed rubber is a regenerated resource processed from waste butyl inner tubes. It retains the basic performance characteristics of butyl rubber. It has better compatibility and vulcanization performance with other types of rubber than butyl rubber. It can replace butyl rubber in three In the production of EPDM rubber products, the cost of raw materials is reduced under the premise of ensuring quality.
2. The advantages of EPDM rubber products in choosing butyl recycled rubber
From the point of view of product performance, butyl reclaimed rubber has good air tightness, water tightness, shock absorption performance, and stable chemical performance. When mixed with EPDM rubber products, it can improve the overall performance of the products and extend the service life of rubber products. From the perspective of production process, the mixing performance and vulcanization performance of butyl reclaimed rubber are better; it can reduce the extrusion expansion rate of the rubber compound, improve the dimensional stability of the product, and reduce the probability of bubble generation.
From the cost point of view, the price of butyl reclaimed rubber is much lower than that of butyl rubber and EPDM rubber. Substituting raw rubber can reduce the raw material cost of rubber products; it can reduce the power consumption in the production process of rubber products and save processing costs.
3. Defects of EPDM rubber products using butyl reclaimed rubber
The use of butyl reclaimed rubber in EPDM rubber products can improve the rubber material processing technology, improve the overall performance of the product, and reduce production costs; but the strength of butyl reclaimed rubber itself is slightly lower than that of butyl original rubber, especially small butyl inner tube reclaimed rubber Therefore, rubber product manufacturers need to reasonably control the amount of butyl reclaimed rubber. If the cost permits, use high-strength butyl reclaimed rubber processed from branded waste butyl inner tubes as much as possible.
4. Dosage of butyl recycled rubber in EPDM rubber products
When using butyl reclaimed rubber in EPDM rubber products, the rubber product must reasonably control the blending ratio of reclaimed rubber 2LLYY713 according to actual needs. Under normal circumstances, 40 parts of butyl reclaimed rubber (including 20% butyl rubber) can replace about 20% of EPDM rubber; with the use of appropriate amount of silica, calcium carbonate and other reinforcing filling systems, physical and mechanical properties can be prepared Higher EPDM rubber products.
In actual production, butyl reclaimed rubber can be incorporated into various types of EPDM rubber products, which can improve the process performance of rubber compounds and extend the service life of rubber products while reducing more raw material costs. Later editors will have the opportunity to continue to share with you the formulation design skills and processing techniques of butyl recycled rubber and EPDM rubber to produce rubber products.