Nylon fiber has better performance than polyester fiber in terms of flexibility, elastic recovery rate, wear resistance, alkali resistance, moisture absorption and lightness, but its cost is about double that of polyester fiber, and nylon 66 It is 20~40% higher than nylon 6, so the future development of nylon fiber and whether it can surpass polyester fiber.
1. Electrical conductivity: antistatic is one of the necessary properties for clothing and carpet applications. In the early stage, polyether was added, but it was not ideal at low temperatures. Recently, conductive particles such as carbon black can be coated or internally eliminated to eliminate static electricity , The use of this carpet has been rapidly expanded ‧
2. High-strength and high-modulus fibers: the cords used in tire cords have the characteristics of high strength and high modulus and fatigue resistance. Due to the polyamide molecules bonded into a folded structure, currently nylon 66 and nylon 6 The actual strength and modulus of the polyamide fiber only reach 10% of the theoretical value, so there is the development of liquid crystal spinning.
3. Silk-like silk material for clothing and apparel: The fiber for clothing and apparel requires comfortable and delicious appearance. In addition to the antistatic properties mentioned above, gloss, softness, and hygroscopicity need to be improved, and gloss improvement has increased matting The amount of titanium dioxide added to the agent is 2~3% to achieve the effect of dull light similar to cotton fiber. It has a luster similar to silk spun with triangular particles or star-shaped cross-section. Because the elastic recovery rate of nylon fiber is higher than that of polyester fiber Good, and its modulus (Yang Di coefficient) is low, so it has a softer and richer feel‧Nylon blended fibers with different shrinkage rates (such as 40d/68f+30d/12f high shrinkage), after dyeing and finishing The surface of 0.6d fine denier appears on the surface, so the fabric has a soft luster and a soft feel. Fine denier nylon improves the softness of the fabric, and the different shrinkage blending improves the richness and vividness of the fabric. Fiber processing of fibers must develop towards this trend.
4. Lightweight new nylon material: the ratio of nylon fiber is more important than polyester, so the fabric has lightness characteristics. If it is spun with a hollow section, the fiber has a lighter feel, the fluffy feeling after processing is also better, and it has thermal insulation Therefore, how to develop nylon fibers with high hollowness is an important research topic for nylon fiber factories.
