A process method for improving the inner quality uniformity of coarse denier porous special-shaped filament pet-poy

Abstract

The invention relates to a process method for improving the inner quality uniformity of coarse denier porous special-shaped filament PET-POY, comprising the following steps: preparation of a spinning melt stream, slow cooling, cooling and solidification, oiling, and winding. The invention controls the lower spinning temperature by selecting the low-viscosity polymer melt, avoiding the melt degradation, improving the strength of the product, and reducing the strength CV value; and heating the thread through slow cooling to control the elongation of the product CV value; through cooling and solidification, the cooling air flow is stabilized, and the uniformity of cooling is improved; through the design of the special-shaped degree of the spinneret hole, the special-shaped degree of the product is improved; through the oiling step, the thread is stable and the thread is reduced. Dry CV value, thereby improving the quality uniformity of the coarse denier porous profiled filament PET-POY product, making the manufactured product with high dyeing rate, less appearance defects, high profile degree, and yarn when used on a wide-width water jet loom. Uniform tension, consistent density, excellent style, and strong functionality.

Description

technical field [0001] The invention relates to the field of fiber preparation, in particular to a process method for improving the internal quality uniformity of coarse denier porous special-shaped filament PET-POY. Background technique [0002] In recent years, the use of special-shaped fibers has become increasingly widespread. Special-shaped fibers have broad market prospects in the three fields of clothing, decoration and industrial textiles, and are also ideal raw materials for non-woven fabrics and imitation leather coatings. Because it has been found that shaped fibers are increasingly showing the unparalleled superiority of ordinary fibers. For example, in the field of carpets, the specialties of shaped fibers are elasticity, no pilling, high bulkiness, coverage and antifouling effect. In the field of non-woven fabrics, the adhesion of shaped fibers is much greater than that of round fibers. In the field of industrial hygiene, brushes made of X and H-shaped fibers...

AI Technical Summary

Problems solved by technology

[0005] At the same time, during the production of chemical fiber spinning, the monomers and oligomers in the melt will volatilize, the tow will be cooled immediately, the fluidity and tensile properties of the tow will deteriorate, and the filaments will be easily broken. In order to ensure the quality of spinning, it is necessary to spray The silk coming off the wire plate is added with slow cooling and heat preservation treatment before entering the side blowing cooling. Some slow cooling heaters are used in the existing ones. For example, the application number CN201320565542.4 discloses a slow cooling heater, but this slow cooling heating If the temperature sensor is set in the middle, it cannot sense the temperature change around each air duct hole, and cannot accurately control the temperature, making the temperature around each air duct hole different, resulting in uneven heating of the entire slow cooling heater. At the same time, this kind of slow cooling heater is relatively simple. Once the heating wire is damaged, it is not easy to replace, and it does not have the function of recycling, and the environmental protection is poor. Therefore, it is necessary to propose a new slow cooling heater.

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