Basic Introduction of Polyamide

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What is polyamide?

Polyamide is commonly known as nylon which is the general term for polymers containing amide groups in the repeating units of the main chain of macromolecules. Polyamides can be obtained by ring-opening polymerization of lactic acid amines, or by polycondensation of diamines and dibasic acids. Polyamide (PA) refers to a polymer whose main chain contains polar amide groups (-CO-NH-). Originally used as a raw material for making fibers, PA later became a widely used engineering plastic in the industry due to its toughness, wear resistance, self-lubrication, and wide temperature range. PA is widely used to replace copper and other non-ferrous metals to make machinery, electrical parts, such as diesel engine fuel pump gears, water pumps, high pressure seals, oil pipes, etc.

Features of polyamide

As a large amount of engineering plastics, polyamide is widely used in machinery, automobiles, electrical appliances, textile equipment, chemical equipment, aviation, metallurgy and other fields. It has become an indispensable structural materials in various industries, and its main features are as follows.

Excellent mechanical properties

Nylon has high mechanical strength and good toughness.

Good self-lubrication and friction resistance

Nylon has good self-lubricating properties and low friction coefficient, so as a transmission component, its service life is long.

Excellent heat resistance

Such as nylon 46 and other highly crystalline nylon, the heat distortion temperature is very high, and it can be used for a long time at 150℃. After PA66 is reinforced by glass fiber, its heat distortion temperature reaches above 250℃.

Excellent electrical insulation properties

Nylon has high volume resistance and high breakdown voltage, and is an excellent electrical insulating material.

Water absorption

Nylon has high water absorption, and the saturated water can reach more than 3%. To a certain extent, it affects the dimensional stability of the product.

Types of polyamide

The main varieties of polyamide are nylon 6, nylon 66, nylon 11, nylon 12, nylon 610, nylon 612, nylon 46, nylon 1010 and so on. Among them, nylon 6 and nylon 66 have the largest output, accounting for more than 90% of nylon output. Nylon 11 and nylon 12 have outstanding low temperature toughness. Nylon 46 has excellent heat resistance and has developed rapidly. Nylon 1010 is a unique variety produced by castor oil as raw material.

Purchase polyamide from us

Dongguan Shengwen Plastic Trading Co., Ltd. is a comprehensive company specialized in production, sales and service of special engineering plastic. If you want to purchase polyamide, please kindly contact us immediately. We look forward to cooperating with you!


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