Also known as safety shoes outsole bottom, depending on the material can be simply divided into: natural rubber or synthetic rubber. There are common rubber, vulcanized rubber, or polyvinyl chloride. The function of the sole is mainly abrasion resistance, chemical resistance, heat insulation and oil resistance, but due to the different characteristics of various materials, the function is also different. The steel plate is installed on the safety shoe's midsole to prevent the sole from being punctured by nails or hard objects. In addition, soles made of certain materials can reduce the generation of static electricity or relieve the speed of electrostatic discharge. This controls the potential for static electricity to cause an explosion or fire. In addition to using a non-slip rubber sole, the design of the sole is also important for anti-slip functions. Rubber soles not only have good abrasion resistance, but also have good anti-slip properties. Classification of leather used in safety shoes leatherette artificial leather: recycled leather is also called imitation leather or plastic material, is a generic term for PVC and PU and other artificial materials. It is made on the basis of textile or non-woven fabrics, and is made of various formulas such as PVC and PU, which can be foamed or coated. It can be based on different strength, wear resistance, cold resistance, color, luster, and pattern. Patterns and other requirements for processing, with a variety of colors, waterproof performance, neat trim, high utilization and cheaper than the price of leather, but most of the artificial leather, its feel and flexibility can not achieve the effect of leather; its vertical Cut surface, you can see the fine bubble hole, cloth or surface film and dry dry man-made fibers. It is a type of material that has been very popular since the early days and is widely used to make leather products, or parts of leather materials. Its increasingly advanced production technology is being widely used in the processing of two-layer leather. Today, it resembles leather. 3Pc Flanged Ball Valves,3Pc Flanged Ball Valve ,3 Flanged Ball Valve,3 Piece Flanged Ball Valve WENZHOU DIYE VALVE&FITTINGS CO.,LTD , https://www.diye-valve.com