The manufacturer of pneumatic ball valve asked you about the common classification
-I believe that everyone must be familiar with it. Today, our editor also introduces us to the common classification in our life. Please see the following:
1. Natural (NR) is mainly hydrocarbon (polyisoprene), containing a small amount of protein, water, resin acid, sugar and inorganic salt. High elasticity, high tensile strength, excellent tear resistance and electrical insulation, good abrasion resistance and drought resistance, good processability, easy to bond other materials, and superior to most composites in comprehensive performance. The defect is poor oxygen and ozone resistance, easy to aging and metamorphosis; Poor oil and solvent resistance, low ability to resist acid and alkali corrosion; The heat resistance is not high. Operating temperature range: about - 60 ℃~+80 ℃. Manufacture tires, rubber shoes, rubber hoses, adhesive tapes, insulating layers and sheaths of wires and cables and other general products. Especially suitable for manufacturing torsional vibration eliminator, pneumatic ball valve of starter, machine support, metal suspension components, diaphragms and molded products.
2. Copolymer of styrene butadiene (SBR) and styrene. Its performance is close to nature, and it is currently the largest general synthesis. Its characteristics are abrasion resistance, aging resistance and heat resistance beyond nature, and its texture is more natural and average. The defects are: low elasticity, poor bending resistance and tear resistance; Poor processability, especially poor self adhesion and low raw rubber strength. Operating temperature range: about - 50 ℃~+100 ℃. It is mainly used to replace natural tires, rubber plates, rubber hoses, rubber shoes and other general products.
3. cis butyl (BR) is a cis structure polymerized from butadiene. Advantages: excellent elasticity and wear resistance, good aging resistance, good low temperature resistance, low heat under dynamic load, easy metal bonding. The defects are low strength, poor tear resistance, poor processing performance and self adhesion. Operating temperature range: about - 60 ℃~+100 ℃. It is mainly used for manufacturing tire tread, conveyor belt and special cold resistant products.
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