The main type of nylon is aliphatic polyamide fiber, which can be composed of a monomer such as lactam or amino acid. At this moment, the Arabic numerals after the nylon name indicate the number of carbon atoms in the lactam or amino acid used, such as nylon 6, nylon 11, etc; It can also be composed of two monomers, namely a diamine and a diacid. At this moment, the two sets of Arabic numerals after the nylon title, the first set represents the number of carbon atoms in the diamine, and the second set represents the number of carbon atoms in the dicarboxylic acid, such as nylon 66, nylon 610, nylon 1010, etc. It is difficult to distinguish between nylon 6 and nylon 66 on the surface.

Nylon 6 products have characteristics such as high strength, wear resistance, softness, and a warm touch to the skin. They have a wide range of uses in the fields of clothing, silk, umbrellas, fishnet silk, curtain silk, BCF carpet silk, and engineering plastics. Generally speaking, the hand feel of nylon 66 is better than nylon 6, and the comfort of other nylon 66 is also better than nylon 6.

The polymerization degree of nylon 6 is 140-200, and the polymerization degree of nylon 66 is 55-77. The molecular chain of nylon contains a large number of amide groups, which can form attractive hydrogen bonds with the amide groups of adjacent molecular chains. The CH2-CH2- segment has excellent flexibility, and the molecular chain structure is relatively regular without large side groups. When the molecular chain is stretched, it is easy to form crystals with a crystallinity of 50% to 60%. Nylon is made by melt spinning method, and its shape under the microscope is similar to polyester, with a circular cross-section and a smooth and straight longitudinal direction. The density is relatively small, about 1.14g/cm3.

Article source: Nylon colored yarn

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