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Polyamide: A Multi-purpose Chemical


Published On Dec. 13, 2016 By Madhu

Polyamide (PA), commonly known as nylon, is a polymer with a large number of pharmaceutical and industrial applications. Chemically, the polymer backbone is composed of repetitive units of diamines and dicarboxylic acids that contain different numbers of carbon atoms, imparting a variety of material properties. Commercialized in the 1940s, polyamides have entered the market place on a large scale for the manufacturing of fibres for clothing or thermoplastics for carpets, cogs, car parts, tire reinforcements and other products.

Currently, the global market requires 6.6 million tons per annum, making polyamides one of the most important industrial polymers. Its good biocompatibility has further led to its implementation in medical applications, such as providing a scaffold for tissue cultures, foil for orbital implants, and bone support in arthroplasty.

Novel developments extend the application range of polyamides to diagnostics and cellular control devices in molecular medicine

The properties of the polyamides (nylons) include high strength, abrasion resistance, and resilience making them crucial for making clothing and carpets. Although these polyamides account for 95% of the overall material that is used in women's hosiery, it only accounts for about 5% of the total fibres used to make clothing. Nevertheless, this is more than either the polypropionates (acrylics) or wool but it is substantially less than either cotton or polyesters.

Bio-Polyamide is a polymer that is used for a wide range of applications that require plastic materials with high melting temperature. Its properties are diverse and adaptable to suit varied applications areas owing to the availability of bio-Polyamides variants. It is a highly flexible material that can be combined with different materials.

The low-friction property of bio-PA is useful for many large volume standard products in addition to gears, bushings, and plastic bearings. Also, in applications where the chances of wear are high, bio-PA is preferred over other engineering plastics and commodity plastics.

Bio-PA is widely used in consumer products such as toys, furniture points of impact, and applications involving extreme temperatures.

Moulded Polyamide Cover Cuts Weight in Toyota Engine Application. In a recent example, Toyota has developed an improved method of covering a power transmission timing belt with a complicated plastic enclosure. The timing belt transmits the power from a crank shaft to a cam shaft. The moulding is particularly tricky because it holds an oil-sealing gasket that creates problems of heat, pressure, and creep.

Polyamide is mostly used in auto mobile industry widely, research says Polyamide industry will be around US$32 bn by 2025.

Another good part of Polyamide is its availability, It can be obtained naturally and by man-made methods too. Polyamide is pure plastic engineering and its uses are still getting discovered day by day.