Multifunctional hollow polyester fiber production method

Abstract

The invention discloses a multifunctional hollow polyester fiber production method, which includes the steps: grinding tourmaline powder and far infrared ceramic powder to obtain functional powder; sufficiently mixing the functional powder with polyester melt to manufacture multifunctional master batches; mixing and heating the multifunctional master batches and polyester chips to form functional master batch polyester mixed melt, and pumping the mixed melt into a primary static mixer through a metering pump; pumping the polyester melt into the primary static mixer; and feeding the formed mixed melt into a spinning nozzle to form hollow fiber yarns sequentially through a melt filter and a secondary static mixer under the action of a booster pump. The production method can be used for simultaneously evenly scattering various functional additives into the polyester melt, and is stable in product quality, reasonable in process flow and suitable for large-scale production.

Description

technical field [0001] The invention relates to a polyester fiber preparation process, in particular to a polyester fiber production method with composite functions such as negative ions and far infrared rays. Background technique [0002] Polyester hollow fiber is a differentiated fiber product that develops rapidly in my country. In addition to its special luster, stain resistance, anti-pilling properties, and the ability to improve the elasticity and bulkiness of the fiber, it also has a small relative density, The advantage of good hand feeling is widely used in home textile products, textile filling materials, artificial fur and non-woven fabrics and other industries. Polyester hollow fiber is made by mixing polyester raw materials PTA (terephthalic acid) and EG (ethylene glycol) in proportion, and under the action of a catalyst, undergoes two stages of esterification, two stages of precondensation polymerization and one stage of final polycondensation reaction. Po...

AI Technical Summary

Problems solved by technology

[0004] Although there are many techniques for the production of functional fibers, the physical modification method is the most simple and easy, with stable performance and long-lasting effect. This technique mixes functional additives into polymers for spinning, but the actual production It also gradually showed many deficiencies. First of all, most of the process methods are mixed with functional additives such as polyester chips and tourmaline powder or infrared ceramics, and then melted into the indirect spinning production method of the spinning box. This production method not only exists The disadvantages of long process flow, high labor, energy consumption and material consumption, and the fact that the raw materials are difficult to remove after absorbing water, make the high polymers in the melting process of polyester chips prone to thermal cracking, thermal oxidative cracking and hydrolysis at high temperatures. The quality of the final fiber product will be greatly reduced, and the vaporization of the water in the melt will also increase the spinning breakage rate, and even make the spinning impossible in severe cases; at the same time, there are too many impurities and powder in the melt in this indirect spinning. It also directly affects the quality of fiber products; even if the direct spinning production process of adding functional additives directly to the polyester melt for spinning is used, the solid functional powder is concentrated or even lumpy in the melt Distribution, poor dispersibility, insufficient compatibility between functional powder and polyester melt, not only can not guarantee the quality of functional fibers, but also increase the amount of functional additives

Furthermore, the existing functional fibers only have the function of releasing negative ions or emitting far-infrared rays. The cross-sectional shape of the fiber is also a solid structure, with a single function and structure, which cannot meet the comprehensive needs of textiles for differentiated fibers and functional fibers.

In particular, the existing melt spinning process path, the parameters of each process and the correlation between the parameters are not reasonable, and the mutual coordination and proportioning between the various processes are rarely considered; although various functional additive materials can be used at the same time in theory Mixed into the polyester melt, but the actual production is difficult and costly, and it is difficult to evenly mix a variety of functional additives into the polyester fiber material