The silica gel of the kettle is the white one that is waterproof and leaked out
Isoprene rubber (IR) is a kind of CIS structural rubber polymerized from isoprene monomer. The chemical composition and solid structure are similar to those of natural rubber, and the properties are very close to natural rubber. Therefore, synthetic rubber is called. It has most of the advantages of natural rubber, aging resistance is better than natural rubber, elasticity and strength is slightly lower than natural rubber, poor processing performance, higher cost. Temperature range: about 50 DEG C + 100 can be used instead of natural rubber production of tires, rubber shoes, rubber hose, tape and other general products.
Polybutadiene rubber (BR) is a cis structure by polymerization of butadiene rubber. The utility model has the advantages of good elasticity and wear resistance, good aging resistance, excellent low-temperature resistance, small heat generation under dynamic load and easy metal bonding. The disadvantage is low strength, poor tearing resistance, poor processability and self adhesion. Temperature range: about 60 + 100 DEG C. Usually used in combination with natural rubber or styrene butadiene rubber. It mainly produces tyres, tread, conveyor belts and special cold resistant products.
Butadiene styrene rubber (SBR) copolymer of butadiene and styrene. Performance is close to natural rubber, is the largest yield of general-purpose synthetic rubber, characterized by wear resistance, aging resistance and heat resistance, more than natural rubber, texture is more natural rubber uniform. Disadvantages are: low elasticity, anti bending, anti tear performance is poor; the processing performance is poor, especially the poor, low strength self adhesive rubber. Temperature range: about 50 DEG C + 100. Mainly used instead of natural rubber to make tires, rubber sheets, hose, rubber shoes and other general products.
Natural rubber (NR) is mainly composed of rubber hydrocarbons (polyisoprene), containing a small amount of protein, water, resin acids, sugars and inorganic salts. The utility model has the advantages of large elasticity, high extension strength, high tear resistance and electrical insulation, good abrasion resistance and drought resistance, good processability, easy adhesion to other materials, and superior performance in synthetic rubber in comprehensive performance. The disadvantage is that oxygen and ozone resistance is poor, easy aging, metamorphism, oil and solvent resistance is bad, resistance to acid and base corrosion is low; heat resistance is not high. Temperature range: about 60 DEG C 80. Make tires, rubber shoes, hose, tape, wire and cable insulation and sheath, and other general products. The utility model is especially suitable for making torsional vibration eliminator, engine shock absorber, machine support, rubber metal suspension element, diaphragm and molded product.
Silica gel is a highly active adsorption material, belongs to the amorphous substance, and its chemical formula is mSiO2. NH2O. Insoluble in water and any solvent, non-toxic, tasteless, chemical stability, in addition to strong alkali and hydrofluoric acid, do not react with any substance. Different types of silica gel have different microporous structures because of their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics which are difficult to be replaced by other similar materials: high adsorption properties, good thermal stability, stable chemical properties, high mechanical strength, etc..
