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Hydroscopic polyester fiber and preparation method thereof

A technology of polyester fiber and hygroscopicity, which is applied in the field of hygroscopic polyester fiber and its preparation, and can solve the problems of poor moisture absorption durability, insufficient hygroscopicity, and sheath cracking

Inactive Publication Date: 2013-12-18
SUZHOU LONGJIE SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method solves the problem of cracking of the sheath caused by the expansion of the core due to moisture absorption, it has the disadvantages of insufficient moisture absorption and poor moisture absorption durability.

Method used

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  • Hydroscopic polyester fiber and preparation method thereof
  • Hydroscopic polyester fiber and preparation method thereof
  • Hydroscopic polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A certain amount of polyester raw materials dimethyl terephthalate and ethylene glycol, catalysts and auxiliary agents are added to the first reaction tank, and the reaction is carried out for 4 to 6 hours to obtain polyethylene terephthalate.

[0063] Polyvinylpyrrolidone (hereinafter referred to as PVP) with a K value of 30 and polyethylene terephthalate are used in a two-screw extruder (ψ44mm, L / D: 45), and the temperature is set to 260°C at the melting part , The kneading section is at 200°C, and the feeding section is controlled at 80°C for extrusion. The amount of PVP added is based on 5% of the polyester weight in the final polyester fiber, and the extrusion condition is good. The average dispersion diameter of PVP in the obtained composition was 80 nm. The composition was subjected to a spinning experiment. The spinning temperature was 270° C., the temperature of the heating cylinder at the mouthpiece was set at 290° C., and the spinning speed was 1000 m / min to...

Embodiment 2～4

[0065] Change the addition amount of PVP, make PVP account for 5%, 15%, 20% of polyester weight respectively in the final polyester fiber, other are the same as embodiment 1. There were no problems with mixing stability and spinning,

[0066] The specific results are shown in Table 1.

Embodiment 5

[0072] PVP and polybutylene terephthalate with a K value of 30 are used in a two-screw extruder (ψ44mm, L / D: 52), and the temperature is set at 240°C in the melting section, 180°C in the mixing section, and The material part is controlled at 60°C for extrusion. The amount of PVP added is based on the fact that PVP accounts for 10% of the polyester weight in the final polyester fiber, and the extrusion condition is good. The average dispersion diameter of PVP in the obtained composition was 50 nm. The composition was subjected to a spinning experiment. The spinning temperature was 245° C., the temperature of the heating cylinder at the mouthpiece was set at 280° C., and the spinning speed was 1000 m / min to obtain primary fibers. Then, through 4.3 times of stretch processing, the stretched yarn with a tensile strength product of 23.0 was obtained. After testing, the moisture absorption difference ΔMR of the stretched yarn is 2.2%, the fiber tone b value is 3.0, and the dissolu...

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Abstract

The invention discloses a preparation method of a hydroscopic polyester fiber. The preparation method is characterized by comprising the following steps of on a biaxial extruder with the length-diameter ratio L / D being more than 40, carrying out low-temperature blending on polyester and polyvinylpyrrolidone with the K value being 15-90 under the vacuum condition, thus obtaining a composition of the polyester and the polyvinylpyrrolidone with the average dispersing diameter of the polyvinylpyrrolidone being below 200nm metered by that the adding amount of the polyvinylpyrrolidone in the polyester fiber accounts for 2%-20% of the weight of the polyester; and making yarns from the composition by melt spinning to obtain primary fibers, and further drawing the primary fibers to obtain extended yarns.

Description

technical field [0001] The invention relates to a hygroscopic polyester fiber and a preparation method thereof. Background technique [0002] Polyester is a typical thermoplastic synthetic fiber. Since its invention, it has been widely used in clothing and industrial applications due to its excellent mechanical strength, chemical resistance, and heat resistance. [0003] However, the hygroscopicity of polyester fiber is extremely low. When it is used for underwear, sports clothing, etc. that are in direct contact with the skin or worn close to the skin, it will feel sticky because the skin sweats and cannot be discharged in time. Natural fibers are poor, thus limiting the development of polyester fibers in clothing applications. [0004] In order to improve the hygroscopicity of polyester, the most commonly used method is to copolymerize hygroscopic components in polyester or add hygroscopic compounds. Known copolymerized hygroscopic components include diols containing hyd...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10D01F8/14D01F8/10D01D5/08D01D5/12
Inventor 徐醒我关乐赵满才
Owner SUZHOU LONGJIE SPECIAL FIBER