Chlorinated butyl reclaimed rubber is mostly processed from the main raw materials of medical butyl bottle stopper, which can directly replace chlorinated butyl rubber or be used with chlorinated butyl rubber, butyl rubber, EPDM rubber, etc. to produce various rubber products, effectively reducing production costs. When producing rubber products with chlorinated butyl reclaimed rubber as the main raw material, the reinforcing agent directly affects the physical and mechanical properties of the finished rubber products. Xiao Bian will share with you today the role and adding skills of carbon black and white carbon black in chlorinated butyl reclaimed rubber products.
1. Skills of using carbon black in chlorinated butyl reclaimed rubber products
Carbon black is the most widely used reinforcing agent in the chlorinated butyl reclaimed rubber products. Different types of carbon black have different effects in the chlorinated butyl reclaimed rubber products.
In actual production, fine particle carbon black, such as high wear-resistant carbon black, medium and super wear-resistant carbon black and mixed trough carbon black, has good reinforcement effect in the chlorinated butyl reclaimed rubber products, which can give the vulcanizate higher tensile strength. The tensile stress and hardness increase with the increase of carbon black content, while the elongation at break of the vulcanizate decreases with the increase of carbon black content; The elongation of chlorobutyl reclaimed rubber vulcanizate using fine particle hot cracking carbon black is greater. With super wear-resistant carbon black, high wear-resistant carbon black and mixed furnace black, the tear strength of chlorinated butyl reclaimed rubber vulcanizate is higher.
In addition, the variety and amount of carbon black will also affect the ozone resistance, compression set, vulcanization performance and extrusion performance of the reclaimed chlorinated butyl rubber vulcanizate. In general, the less carbon black is used in the chlorinated butyl reclaimed rubber 2SLYY13, the better the ozone resistance of the vulcanizate is, and the furnace black and hot cracking carbon black are better than the tank black; The furnace black can give better compression set resistance to the reclaimed chlorinated butyl rubber vulcanizate than the tank black. During the vulcanization of chlorinated butyl reclaimed rubber, the chlorinated butyl reclaimed rubber with tank method carbon black is more prone to scorch than furnace black. The chlorinated butyl reclaimed rubber with high wear-resistant carbon black, super wear-resistant carbon black and fast press furnace black has better extruding performance.
2. Techniques of using white carbon black in chlorinated butyl reclaimed rubber products
White reinforcing filler commonly used for chlorinated butyl reclaimed rubber is white carbon black. The reinforcing effect of white carbon black in chlorobutyl reclaimed rubber is the best. With the increase of the amount of silica, the chlorinated butyl reclaimed rubber vulcanizate will harden and delay vulcanization; It is suggested to adopt heat treatment process to improve the reinforcement effect and the processing properties and softness of the compound, such as using magnesium oxide to heat treat the white carbon black compound.
In addition, when the chlorobutyl reclaimed rubber is vulcanized, silica will delay vulcanization. It is recommended to increase the amount of vulcanizing agent appropriately, or add a small amount of polyethylene glycol or diethylene glycol.
The reclaimed chlorinated butyl rubber retains the basic performance characteristics of chlorinated butyl rubber. It has good air tightness, water tightness, heat resistance, shock absorption and bending resistance. It can be used in automobile and motorcycle inner tubes, damping damping blocks, sealing rings, rubber sheets, fenders, sealing strips, chemical anti-corrosion, building waterproof materials, etc; The following small series will continue to share with you the design points of chlorinated butyl reclaimed rubber curing system, reinforcement filling system, softening system and anti-aging system.
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