The scientific name of dragon fiber is polyamide fiber. Polyamide fiber is the first commercialized synthetic fiber product of synthetic polymer. What are its characteristics? Let’s learn about it with the editors of nylon thermal fuse, Yizhengzhi and special chemical fibers.
Wear resistance: The wear resistance of polyamide fiber is the best among all textile fibers.
Breaking strength: The breaking strength of polyamide long fiber for clothing is 5.0~6.4g/d, while the breaking strength of high-strength yarn for industrial use is 7~9.5g/d or even higher. The breaking strength in the wet state is about that of the dry state. 85%~90%.
Elongation at break: The elongation at break of polyamide fiber varies according to different varieties. The elongation of strong yarn is as low as 10~25%. The elongation of general clothing yarn is 25~40%. The elongation at break in wet state is It is about 3~5% higher than the dry state.
Elastic recovery rate: Polyamide fiber has good resilience. When the elongation of long fiber is 10%, its elastic recovery rate is 99%, while polyester is 67% under the same conditions, and rayon is only 32%.
Fatigue resistance: Because polyamide fiber has good elastic recovery rate, its fatigue resistance is also good.
Hygroscopicity: Polyamide fiber has the highest hygroscopicity among synthetic fibers.
Dyeability: The dyeability of polyamide fiber is more difficult than that of natural fibers and rayon, but it is still easier to dye than other synthetic fibers. It is usually dyed with acid dyes.
Optical properties: Polyamide fiber has birefringence, and the birefringence changes greatly with the elongation ratio.
Optical rotation resistance: Polyamide fiber has poor optical rotation resistance. Adding a light-resistant agent during polymerization to make the fiber can improve the optical rotation resistance.
Heat resistance: Polyamide fiber has poor heat resistance.
Chemical resistance: Polyamide fiber has good alkali resistance, but poor acid resistance.
Post time: Jul-17-2024