What is the use of common rubber flexible joints - fluoroelastomer flexible joints - materials?

What is the use of common rubber flexible joints - fluoroelastomer flexible joints - materials?
Rubber is very common in manufacturing In addition to rubber, it is made of graphite, PTFE and various sealants in production. Rubber products joints are commonly used at home and abroad. More commonly used industries include chemical industry, national defense, coal, transportation, etc. It can be a common basic part in various industries. 1. Nitrile rubber is a commonly used material in oil resistance. Nitrile rubber (NBR) has excellent resistance to flammable oil and aromatic solvents, but not resistant to ketones, esters, hydrogen chloride and other media.
 
Joint head better dense, especially for transporting vapor high-pressure hose. Nuclear has better adaptability to conveyed substances, such as petroleum pipeline hose stipulates solubility resistance, chemical plant hose stipulates corrosion resistance, fine sand hose stipulates abrasion resistance, food hose stipulates non-toxic and odorless. Rubber joints have certain elasticity, flexibility and temperature resistance. Rubber joint processing process requirements, rubber joints and other components vulcanization rate pairing, that is, close to the outer rubber, but slower than the cloth layer rubber. Than suitable for processing process performance requirements, such as semi-finished products processed with sufficient stiffness, small expansion and contraction, press out, die-casting surface finish, easy to form. Can bend rubber, plastic and use; can also use rubber and plastic products co-mingled, and can use the appropriate amount of recycled rubber. Industrial areas have rubber joints and bendable rubber joints, the general rate of rubber content is 25 percent -30 percent. Than the vulcanization management system generally uses sulfur and vulcanization accelerator traditional vulcanization management system. The dose of sulfur is 1.5~2.5 parts, and the vulcanization accelerator is better with thiazoles and their sulfonamides.
 
Chloroprene rubber neoprene has good corrosion resistance to inorganic acids. Chloroprene rubber has good flexibility and impermeability, can be made into film and vacuum sealing products. Neoprene has good oil resistance and solvent resistance, but not aromatic oil resistance. The cross-linking break temperature of neoprene is above 200℃, which is usually used to make door and window seals. 3. Compared with most synthetic rubber, natural rubber has good overall mechanical properties, more resistant to cold, higher resilience and wear resistance. Natural rubber is not resistant to mineral oil, but is stable in vegetable oil and alcohol. General sealants are usually made of natural rubber. 4. Fluoroelastomer has excellent heat resistance and oil resistance. It can be used to make cylinder liner seals, rubber bowls and rotary lip seals, which can significantly improve the service time.