Polyamide, commonly known as nylon (Nylon), English name Polyamide (abbreviated as PA), is a generic term for thermoplastic resins containing a repeating amide group - [NHCO] in the molecular backbone. These include aliphatic PA, fat-aromatic PA and aromatic PA. Among them, there are many aliphatic PA varieties, large yield, and wide application, and the name is determined by the specific carbon number of the synthetic monomer.
The main varieties in nylon wheels are nylon 6 and nylon 66, which are absolutely dominant, followed by nylon 11, nylon 12, nylon 610, nylon 612, nylon 1010, nylon 46, nylon 7, nylon 9, nylon 13, New varieties include nylon 6I, nylon 9T and special nylon MXD6 (barrier resin). Nylon has a wide variety of modified varieties, such as reinforced nylon, monomer cast nylon (MC nylon), reaction injection molding (RIM) nylon, aromatic Nylon, transparent nylon, high impact (super tough) nylon, electroplated nylon, conductive nylon, flame retardant nylon, nylon and other polymer blends and alloys, to meet different special requirements, widely used as traditional materials such as metal, wood, etc. Substitutes, as a variety of structural materials.
Performance: Nylon is a tough horny translucent or milky white crystalline resin. As a engineering plastic, the molecular weight of nylon is generally 1.5 to 30,000. The nylon has high mechanical strength, high softening point, heat resistance, low friction coefficient of traditional nylon wheel, and resistance. Wear, self-lubricating, shock absorption and sound absorbing, oil resistant, weak acid resistant, alkali resistant and general solvent, good electrical insulation, self-extinguishing, non-toxic, odorless, weather resistant, poor dyeability. The disadvantage is that the water absorption is large, affecting the dimensional stability and electrical properties, and the fiber reinforcement can reduce the water absorption rate of the resin, so that it can work under high temperature and high humidity. Nylon has a very good affinity with glass fiber.
Nylon nylon 66 has high hardness and rigidity but poor toughness. The various nylons are ordered according to the toughness: PA66<PA66/6<PA6<PA610<PA11<PA12.
The flammability of nylon is UL94v-2, the oxygen index is 24-28, the decomposition temperature of nylon is >299 °C, and spontaneous combustion occurs at 449~499 °C.
One of the types of engineering plastics: polyphenylene ether
The consumption of polyphenylene ether has always been very large, and it has gradually replaced stainless steel to manufacture surgical medical devices. It also involves the production of gears, blower blades, pipes, valves, and parts in some electrical and electronic industries. .
Introduction to the types of engineering plastics: polyphenylene sulfide
Polyphenylene sulfide (PPS) is also a relatively high-grade plastic in engineering plastics. It is often mixed with other materials during use. It has good heat resistance and can resist corrosion to a certain extent. Has a certain flame retardant properties.
Introduction to the types of engineering plastics: polyamide
Polyamide is actually a kind of nylon that people often say, and it is also popular in engineering plastics. The elevator nylon wheel has good mechanical properties, durability, corrosion resistance and heat resistance. What is important is that its processing is also very good. Convenient, it has been widely used in the automotive, electrical and electronic industries.
Introduction to the types of engineering plastics: polycarbonate
Polycarbonate is characterized by its metallic strength and good ductility and toughness. It looks very like glass and has very good transparency. It is often used for lighting glass, lampshades, signal lights, Windshield, etc., is one of the most widely used engineering plastics.
Introduction to the types of engineering plastics: polyoxymethylene
POM is one of the promising plastics in engineering plastics. Because of its hardness and strength like metal, it has gradually replaced some metal-made parts, already in electrical, mechanical, instrumentation, and day. It is widely used in industries such as light industry, automobile, building materials and agriculture, and it is believed that its future development will be better.