Porous superfine denier polyester pre-oriented yarn and preparation method thereof

Abstract

The invention relates to a porous superfine denier polyester pre-oriented yarn and a preparation method of the porous superfine denier polyester pre-oriented yarn. Terephthalic acid and ethylene glycol are adopted to be used as raw materials of polyester, and the existing production equipment of pre-oriented yarn (POY) is adopted. The main technological parameter of the porous superfine denier polyester pre-oriented yarn is: the diameter of spinneret plate microporous is 0.10-0.15 millimeter, the height of a slow cooling area is 80-150 millimeters, and the slow cooling area is combined with ring windchill; two nozzle oiling systems and reasonable winding tension and speed are adopted, the porous superfine denier polyester pre-oriented yarn which is 44-55 dtex / 192f is obtained, and the filament number of the porous superfine denier polyester pre-oriented yarn is 0.23-0.29 dtex. The porous superfine denier polyester pre-oriented yarn has the advantages of being plural in pore number, small in filament number, low in absolute intensity, small in bending rigidity, large in specific surface area and voidage, soft, light in weight and the like. Moreover, the porous superfine denier polyester pre-oriented yarn further has the advantages that filament aggregation has a good capillary core absorption effect and a better ventilation wet guiding function, added value is high, quality is good, production cost is low, the advantage of cost performance is obvious and application prospect is broad.

Description

technical field [0001] The invention relates to a polyester spinning process, in particular to a porous superfine polyester pre-oriented yarn and a preparation method thereof. Background technique [0002] Microfiber raw materials have become a hot spot in the development of light and thin microfiber clothing, high-density fabric products, and jeanette and other textiles. At present, polyester pre-oriented yarns with a linear density above 0.50dtex / f that have been industrialized are generally used as the first choice. Fiber raw materials are well received by consumers in the field of clothing due to their good strength, elasticity, easy washing, quick drying, and non-iron properties, but they also have low moisture absorption, poor moisture permeability, and easy dyeing. Poor durability, hard hand feeling, waxy feeling, aurora and other obvious deficiencies, the wearing comfort of the fabric is difficult to meet people's needs, thus limiting its application in clothing, esp...

AI Technical Summary

Problems solved by technology

[0004] At present, it is still difficult to solve the problems of many yarn breakages, poor spinnability, and production problems in the preparation of porous ultra-fine polyester pre-oriented yarn products with a monofilament linear density below 0.29dtex / f by using domestic and foreign supporting POY equipment and processing technologies. The problem of instability

This is because the porous ultra-fine denier polyester pre-oriented filament fiber of 44dtex-55dtex / 192f (single-filament linear density is 0.23dtex-0.29dtex / f) is prepared by high-speed direct spinning. Due to the large number of fiber holes, the single fiber fineness is relatively small. And the specific surface area is large, the ejection amount of the melt is small, the temperature of the spinneret plate surface is difficult to ensure, and it is easy to cause the spinneret plate surface to be unsmooth. After the spinning melt is extruded, the melt fineness is correspondingly increased. The friction between the flow and the air increases the spinning tension, which leads to a decrease in the tensile tension that the fiber can withstand, resulting in an increase in broken ends of the wool and deterioration of the post-drawing processing performance; at the same time, it is still impossible to solve the problem of There are poor melt mixing uniformity and cooling uniformity in filament forming, porous ultra-fine and poor fiber strip structure uniformity, poor yarn drying unevenness, and poor dyeing uniformity. Effective control of yarn density to improve the stability of spinning operation