Polyamide is commonly known as nylon, full-course Polyamide (PA).
The main varieties of nylon are nylon 6 and nylon 66, occupying an absolute dominant position, followed by nylon 11, nylon 12, nylon 610, nylon 612, in addition to nylon 1010, nylon 46, nylon 7, nylon 9, nylon 13, new There are nylon 6I, nylon 9T and special nylon MXD6 (barrier resin), etc. There are many modified varieties of nylon, such as reinforced nylon, monomer cast nylon (MC nylon), reaction injection molding (RIM) nylon, and aromatic nylon , Transparent nylon, high impact (super tough) nylon, electroplated nylon, conductive nylon, flame-retardant nylon, nylon and other polymer blends and alloys, etc., to meet different special requirements, widely used as a substitute for traditional materials such as metal and wood Supplies, as various structural materials.
Nylon is the most important engineering plastic, and its output ranks first among the five general engineering plastics.
Nylon is a tough angular translucent or milky white crystalline resin. The molecular weight of nylon as an engineering plastic is generally 15,000 to 30,000. Nylon has high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, and self-lubricating. Resistance, shock absorption and noise reduction, oil resistance, weak acid resistance, alkali resistance and general solvent resistance, good electrical insulation, self-extinguishing, non-toxic and odorless, good weather resistance, and poor dyeability. The disadvantage is that the water absorption is large, which affects the dimensional stability and electrical properties. Fiber reinforcement can reduce the water absorption rate of the resin, so that it can work under high temperature and high humidity.
The compatibility of nylon and glass fiber is very good.
Among nylon, nylon 66 has the highest hardness and rigidity, but the toughest. All kinds of nylon are sorted by 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 degrees Celsius, and spontaneous combustion will occur at 449-499 degrees Celsius.
Nylon has good melt fluidity, so the wall thickness of the product can be as small as 1mm.
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