At present, there are more and more tubeless tires. How to produce low-cost, high-quality tire inner liners is a problem that rubber tire manufacturers are thinking about. Compared with butyl rubber, chlorinated butyl rubber has greatly improved vulcanization performance and compatibility with other rubbers. It is widely used in the production of inner liners of large, medium and small tires. The use of chlorinated butyl rubber and chlorinated butyl recycled rubber to produce tire inner liners has become the first choice for many rubber product manufacturers. What should be paid attention to when producing chlorinated butyl rubber inner liners?
Chlorobutyl recycled rubber is mostly processed with waste medical bottle caps and stoppers as the main raw material. It inherits the basic performance characteristics of chlorobutyl rubber and has a much lower price. It is used to replace chlorobutyl rubber to produce tire airtightness. Layers can significantly reduce raw material costs. When using chlorinated butyl rubber to produce inner liners of tires, pay attention to the following issues to ensure quality and reduce costs.
1. Pay attention to the amount of chlorinated butyl rubber
The main role of the tire inner liner is to prevent the leakage of compressed gas, and the air tightness of the rubber is particularly high. Many tire inner liners use chlorinated butyl rubber together with natural rubber. The amount of chlorinated butyl rubber directly affects the tire air tightness. Generally, the amount of chlorinated butyl rubber 2LLYY0107 cannot be less than 60%. When using chlorinated butyl recycled rubber to replace part of chlorinated butyl rubber, rubber product factories need to calculate the replacement ratio and replacement amount of recycled rubber based on the rubber content of the recycled rubber to ensure the air permeability and heat resistance of the inner liner , Flex resistance and so on.
2. Pay attention to the types of compounding agents in the compounding system
When chlorinated butyl rubber / recycled rubber is used to produce the inner liner of tires, the type and amount of compounding agents affect the inner liner, adhesion and flex resistance of the rubber compound. Its general-purpose carbon black, high abrasion-resistant carbon black, clay, and heavy calcium can improve the air-tightness, heat resistance, flex resistance, and adhesion of chlorinated butyl compounds; thiazole based on zinc oxide The vulcanization system is suitable for inner tubes with high chlorinated butyl content. The alkylphenol disulfide vulcanization system is suitable for systems with a lower ratio of chlorinated butyl rubber / natural rubber, which improves the adhesion and flex resistance of dingji airtight layers. Sex.
The type and amount of plasticizer in the chlorinated butyl inner liner formula will affect the adhesive strength of the rubber compound. Phenolic resin, hydrocarbon resin or phenol acetylene resin can be used.
3. Pay attention to production process conditions
When using chlorinated butyl rubber, chlorinated butyl rubber / recycled rubber, chlorinated butyl rubber / natural rubber or chlorinated butyl rubber / recycled rubber / natural rubber and use rubber to produce tire inner liners, rubber product manufacturers need to combine The processing performance of chlorinated butyl rubber, the molecular structure and processing characteristics of chlorinated butyl recycled rubber, and the basic performance characteristics of natural rubber adjust the production process conditions reasonably, especially the mixing process parameters and vulcanization process parameters.
Chlorinated butyl rubber is used in the preparation of inner liners of tires. Rubber product manufacturers choose to mix the appropriate amount of chlorinated butyl recycled rubber is a good way to reduce costs; in the actual production process, we must master the above points, in Reduce the cost of raw materials while ensuring the quality of the inner liner.