Sub-brand nitrile butadiene rubber is a non-key indicators in the production process of nitrile butadiene rubber due to small deviations in production batches, temporary conditions of production equipment and other reasons that do not meet the genuine standard of rubber, with the basic performance characteristics of genuine nitrile rubber, excellent oil resistance, wear resistance, heat resistance, aging resistance, can be used alone or combined with genuine nitrile rubber to produce various types of molded rubber products, effectively reduce the cost of raw materials.
1. Performance requirements for the production of molded rubber compounds of sub-brand nitrile butadiene rubber
When using sub-brand nitrile butadiene rubber to produce molded rubber products, the rubber compound is required to have the following four characteristics.
(1) Large plasticity: Before the vulcanization of the rubber material begins, the rubber material should be easy to flow in the model and can be mixed together evenly.
(2) The rubber material is not easy to scorch, and the storage time is long.
(3) The vulcanization speed is fast, and the rubber compound can achieve flat positive vulcanization in a short time, shorten the vulcanization cycle, and improve the utilization rate of the model.
(4) The rubber material is required to have small compression deformation and good heat aging resistance.
2. Key points of formula design of molded rubber products produced by sub-brand nitrile butadiene rubber
When using sub-brand nitrile butadiene rubber as the main raw material to produce molded rubber products, it is necessary to comprehensively consider the molding vulcanization method, vulcanization temperature and time, storage time of the rubber compound, product characteristics and specifications and other factors, and select the appropriate vulcanizing agent and accelerator, such as when using sulfur-accelerator system, the amount of sulfur is controlled among 1.25-1.5 parts, and 0.25-0.5 parts of accelerator TS are used with sulfur. A small amount of lubricant is used to effectively increase the fluidity of the rubber compound.
3. What kind of molded rubber products can be produced by sub-brand nitrile butadiene rubber?
Sub-brand nitrile rubber has good oil resistance, wear resistance, mechanical strength and processing performance, is an ideal raw material for the production of oil-resistant, wear-resistant molded products, can be used alone or with genuine nitrile butadiene rubber E4LYY95, neoprene rubber combined with the production of oil seals, O-rings, leather bowls, diaphragms, wear-resistant parts, shock absorbers, etc., to ensure the finished product oil resistance, wear resistance requirements while reducing production costs; Reasonable design of the formula can further optimize the quality of the finished product and meet the needs of more industries.
When using sub-brand nitrile butadiene rubber as the main raw material to produce molded rubber products for different use occasions, it is not only necessary to choose the appropriate sub-brand nitrile butadiene rubber, but also to reasonably design the formula, including vulcanization system, reinforcing filling system, softening and plasticizing system, anti-aging system, etc.; Appropriately adjust the production process parameters, especially the mixing process and vulcanization process, and continue to discuss relevant issues with you in the future.
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