Polyurethane
Abbrevant meidence of polyurethane. The resin of the high polymer contains a repeating-HNCO-O-group resin, typically polymerized by a polyisocyanate, a polyol polymer or an aromatic diamine or the like.Since the polyurethane contains a strongly proportion of atrial urethane group, the ratio of NCO / OH in the formulation can be obtained, and different products of thermosetted polyurethane and thermoplastic polyurethane can be obtained. According to its molecular structure, it can be divided into line type and body type. Due to the different crosslink density, the body structure can exhibit a hard, soft or in the characteristics of high strength, high resistance, and solvent resistance. It is the main component constituting the rubber compressed air tube.
PBT
Polyethylene terephthalikanol ester, English name Polybutylece Terephthalate (PBT), PBT is milky white translucent to opaque, crystalline thermoplastic polyester. High heat resistance, toughness, intrinsic, self-lubrication, low friction coefficient, weather resistance, low water absorption, only 0.1%, still maintain various physical properties (including electrical properties), electrical insulation, and electrical insulation in wet environments. However, the volume resistance, the dielectric loss is large. Heat water, alkali, acid, oil, but is susceptible to halogenated hydrocarbon erosion, poor water resistance, fast crystallization, good moldability.
POM
POM (polyol resin) Definition: Polymethylene is a linear polymer having no side chain, high density, high crystalline. According to the chemical structure in its molecular chain, two types can be divided into homogeneal formaldehyde and copolymetaldehyde. The important difference between the two is: homogenate density, crystallinity, high melting point, but the thermal stability is narrow (about 10 ° C), which is slightly low for acid-base stability; and copolydee density, crystallinity, The melting point, the strength is low, but the thermal stability is good, it is not easy to decompose, and the processing temperature range is wide (about 50 ° C), which is better for acid base stability. It is an engineering plastic with excellent comprehensive performance. There is a good physical, mechanical and chemical performance, especially those with excellent resistance resistance. Commonly known as the steel or scoring steel, it is the third larger engineering plastic. Suitable for producing parts for reducing wear parts, transmission parts, and chemical, instrumentation.
One of the synthetic resin, also known as polyformaldehyde resin, POM plastic, steel material, etc. is a white or black plastic particle with high hardness, high steel, high resistance. Mainly used in gears, bearings, automotive parts, machine tools, instrumental internal parts and other products.
