What is the characteristics and main uses of polyamide PA - polyamide, PA, features - the plastics industry

Polyamide PA, commonly known as Nylon , Is the first developed for the U.S. company DuPont fiber resin, in 1939 to achieve industrialization. 50 years of the 20th century began developing and manufacturing plastic products, replacing the downstream industrial products meet the lightweight metal, reduce the cost. Polyamide main chain amide containing many repetitive, as nylon plastic, said, when we call for synthetic fiber nylon, polyamide by diamines and diacids extraction, -amino acids can also be used, or ring lactams synthesized. According to diamines, and dicarboxylic acid or amino acids containing different number of carbon atoms can be obtained by a variety of polyamide, polyamide now, dozens of varieties, of which polyamide -6, -66, and polyamide The most widely used polyamide -610.

Polyamide -6, -66 and polyamide polyamide chain segment structure -610, respectively [NH (CH2) 5CO], [NH (CH2) 6NHCO (CH2) 4CO], and [NH (CH2 ) 6NHCO (CH2) 8CO]. Polyamide -6, and -66 is mainly used for spinning polyamide fiber, nylon called nylon -6 and -66. Nylon -610 is a kind of excellent mechanical properties of thermoplastic Engineering Plastics .

PA has a good overall performance, including mechanical properties, heat resistance, wear resistance, chemical resistance and self lubricating and low friction coefficient, a certain degree of flame resistance, ease of processing, appropriate on glass fiber and Other Fillers enhance the modification, improve performance and expand applications. PA's variety, there is PA6, PA66 , PAll, PAl2, PA46, PA610, PA612, PAl010, as well as in recent years the development of semi-aromatic nylon PA6T and special nylon and many other new varieties. Nylon -6 Plastic Products Sodium metal can be used, the main catalyst such as sodium hydroxide, N-acetyl caprolactam as the catalyst, so that -caprolactam in the model directly by anion ring-opening polymerization and obtained, as casting nylon. In this way facilitate the manufacture of large plastic workpieces.

Performance polyamide PA Toughness angular translucent nylon or white crystalline resin, as the molecular weight of nylon engineering plastics typically 1.5-3 million nylon with high mechanical strength, high softening point, heat resistance, low friction coefficient wear resistance, self lubrication, shock absorption and mute resistance, oil resistance, weak acid, alkali and general solvents, electrical insulation and good, there is self-extinguishing, non-toxic, odorless, weather resistance, dyeability difference. Disadvantage is that large water absorption, dimensional stability and electrical properties affected, fiber-reinforced resins can reduce water absorption, it can be at a high temperature, high humidity to work. Nylon and glass fiber affinity is very good.

The use of polyamide PA Polyamide fibers used, the most prominent advantage is that wear resistance than all other fibers, 10 times higher wear resistance than cotton, wool and 20 times higher than in the mixed Textile Matter slightly to include some of polyamide fiber, can significantly improve the wear resistance; when the stretch to 3-6%, the elastic recovery rate of up to 100%; able to withstand the million flex without breaking off. Polyamide fiber is 1-2 times stronger than cotton, wool and 4-5 times higher than it is 3 times the viscose fiber. However, heat-resistant polyamide fibers and light is poor, too poor to keep sex, clothes made of polyester and keeps better. In addition, the nylon used for clothing and nylon -6 -66 there have poor moisture absorption and dyeing, this has developed new varieties of polyamide fibers?? Nylon -3 and -4 of the new polyamide fiber nylon with a quality Light, wrinkle-free nature of good, good air permeability and good durability, dyeing and heat setting, etc., so is considered promising. As the polyamide

with non-toxic, light weight, good mechanical strength, wear resistance and good corrosion resistance, it is widely used in place of copper and other metals in the machinery, Chemical industry , Instrumentation, automotive and other industries in the manufacturing of bearings, gears, pumps leaves and other parts. Polyamide melt spun into yarn after the high intensity, mainly made of synthetic fibers can be used as medical sutures.

Nylon can be blended in civilian or plain spun into a variety of medical and knitwear. Nylon filaments are used for knitting and silk industries, such as weaving single stockings, wear elastic stockings and other nylon interpretation of socks, nylon scarf, mosquito nets, nylon lace, elastic nylon jackets, all kinds of nylon silk or woven silk goods. Nylon staple fiber is mostly used with wool or other wool products of chemical fiber blend, made from a variety of wear after wear clothing.

I am an expert from chinadrillingequipment.com, while we provides the quality product, such as CFA Equipment , Diaphragm Wall Equipment, drilling rigs,drilling equipment,and more.