Nylon has better hygroscopicity and dyeability than polyester, and is alkali-resistant but not acid-resistant. After long-term sun exposure, its fiber strength will decrease. Nylon has the characteristics of heat setting, which can keep the bending deformation formed when heated.
Extended data
The morphological structure of nylon prepared by melt spinning method observed under microscope is circular cross-section and has no special longitudinal structure. Filamentous fibril structure can be observed under electron microscope, and the fibril width of nylon 66 is about 10- 15nm. If special-shaped spinneret is used, it can be made into nylon with various special cross-sectional shapes, such as polygon, multi-leaf and hollow cross-section. Its focusing structure is closely related to stretching and heat treatment during spinning.
Special-shaped fiber can change the elasticity of fiber, make fiber have special luster and bulkiness, improve the cohesion and covering ability of fiber, resist pilling and reduce static electricity. For example, triangular fibers have a flashing effect; Five-leaf fiber has fat luster, good hand feeling and anti-pilling; Hollow fiber has a cavity inside, so it has low density and good warmth retention.
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