Production process and equipment for whitened low-shrinkage and medium-fine-denier polyamide yarns

Abstract

The invention discloses production process and equipment for whitened low-shrinkage and medium-fine-denier polyamide yarns. The process comprises the following steps of stirring and mixing dried polyamide 66 and an auxiliary agent according to a ratio by a high-speed stirrer, adding a mixture into a screw extruder for melting, enabling melts to pass through a static mixer, further mixing the melts in the static mixer, connecting the static mixer to a metering pump through a pipeline, and uniformly distributing the melts into a plurality of branch pipes by the metering pump; enabling molten polyamide 66 to enter a spinning box for spinning, and protecting extruded polyamide 66 nascent fiber tows by steam and anti-oxidation equipment to avoid high-temperature oxidation discoloration, so that the whiteness of the yarns is improved; performing oiling treatment on the polyamide tows extruded from a spinning manifold through an oiling roller in the vertical direction and then entering a setting machine for multi-section preheating, stretching and setting, so that the heat shrinkage rate is improved; and inspecting the set polyamide yarns, performing winding through an automatic winding machine, performing packaging and warehousing to obtain the whitened low-shrinkage and medium-fine-denier polyamide yarns.

Description

technical field [0001] The invention relates to the technical field of textile yarns, in particular to a production process and equipment for whitening low-shrinkage medium-fine-denier nylon yarns. Background technique [0002] Nylon 66 fiber is a kind of polyamide fiber, which has the advantages of high strength, good wear resistance, soft touch, light texture, good drapability, breathable and moisture absorption, etc. It is a high value-added fiber. Nylon 66 industrial yarn has the characteristics of high strength, high temperature resistance, and stable size. It is an excellent synthetic fiber material widely used in cord fabrics, canvas, conveyor belts, wool packaging bags, etc. It can also be used in airbags, tires, aviation tires , special tires, parachutes, military tents, conveyor belts, industrial filter cloths, ropes, safety belts and military products, etc. At the same time, it is widely used as sewing thread raw materials for high-end clothing because of its soft...

AI Technical Summary

Problems solved by technology

Nylon 66 industrial yarn has the characteristics of high strength, high temperature resistance, and stable size. It is an excellent synthetic fiber material widely used in cord fabrics, canvas, conveyor belts, wool packaging bags, etc. It can also be used in airbags, tires, aviation tires , special tires, parachutes, military tents, conveyor belts, industrial filter cloths, ropes, safety belts and military products, etc. At the same time, it is widely used as sewing thread raw materials for high-end clothing because of its soft feel and light texture. Currently, nylon yarn In production, it is easy to cause oxidative discoloration due to high temperature after spinning, which leads to a decrease in whiteness, and when setting the shape directly, the heat shrinkage is large, and shrinkage and deformation are easy to occur in later use. Therefore, we propose whitening and low shrinkage. The production process and equipment of fine denier nylon yarn are used to solve the above problems

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