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Double-yarn air-spliced high-color-fastness polyester staple fiber and preparation method

A polyester staple fiber, high color fastness technology, applied in the dyeing method, fiber treatment, hollow filament manufacturing, etc., can solve the problems of color flowering, accelerated adsorption rate, low color fastness of polyester staple fiber dyeing, etc., to achieve enhanced Fiber elasticity, increase the contact area, and avoid the effect of color and flower problems

Active Publication Date: 2021-09-28
浙江光乾纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a double-yarn air-spliced ​​polyester staple fiber with high color fastness and its preparation method, which solves the problem that the dyeing color fastness of polyester staple fiber is low, and the use of dyeing auxiliaries increases the temperature of polyester fiber at low temperature. The amount of dye adsorption and the adsorption rate will cause the problem of color flower, and because the fiber absorbs the dye faster, too much dye is only adsorbed on the surface of the fiber and does not enter the interior of the fiber, resulting in an increase in the rate of defective products. The prepared Double-yarn air-spliced ​​polyester staple fiber with high color fastness has excellent performance indicators and meets application requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Double-yarn air-spliced high-color-fastness polyester staple fiber and preparation method
  • Double-yarn air-spliced high-color-fastness polyester staple fiber and preparation method
  • Double-yarn air-spliced high-color-fastness polyester staple fiber and preparation method

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preparation example Construction

[0025] The invention provides a kind of high color fastness polyester staple fiber and preparation method of double yarn air splicing, refer to figure 1 , the process flow diagram of the preparation process of high color fastness polyester staple fiber of double yarn air splicing provided by a specific embodiment of the present invention, the process comprises the following steps:

[0026] a) Mix and stir dimethyl phthalate, ethylene glycol, polypropylene glycol, and potassium hydroxide, heat up until methanol distills, control the reaction temperature at 170°C to 180°C, and wait for the amount of methanol to be distilled to be 93% of the theoretical amount %~97%, the transesterification reaction is over. Add dipropylene glycol isophthalate-5-sodium sulfonate (1% to 3% of the total mass of dimethyl phthalate), ethylene glycol antimony and Mn(OAc)2 blend system, and introduce sodium sulfonate Dye seat, so as to combine with cationic dyes, introduce the meta-position structure...

example 1

[0030] a) Mix and stir dimethyl phthalate, ethylene glycol, polypropylene glycol, and potassium hydroxide, heat up until the methanol distills out, control the reaction temperature at 170°C, and wait for the distilled amount of methanol to be 93% of the theoretical amount. The exchange reaction is complete. Add dipropylene glycol isophthalate-5-sodium sulfonate (1% of the total mass of dimethyl phthalate), ethylene glycol antimony and Mn(OAc)2 blend system, and introduce sodium sulfonate dye base, In this way, it combines with cationic dyes, introduces meta-position structure, destroys the regular structure of macromolecules, and makes dye molecules easy to enter polyester. When the temperature of the kettle reaches 230°C, depressurize the system, and gradually raise the temperature of the kettle to 280°C, and control the vacuum pressure below 80 Pa for 1.42 hours. After the reaction is completed, pressurize with nitrogen and discharge the material.

[0031]b) Dry by hot air ...

example 2

[0034] a) Mix and stir dimethyl phthalate, ethylene glycol, polypropylene glycol, and potassium hydroxide, heat up until methanol distills out, control the reaction temperature at 180°C, and wait until the amount of methanol distilled is 97% of the theoretical amount. The exchange reaction is complete. Add dipropylene glycol isophthalate-5-sodium sulfonate (3% of the total mass of dimethyl phthalate), ethylene glycol antimony and Mn(OAc)2 blend system, and introduce sodium sulfonate dye base, In this way, it combines with cationic dyes, introduces meta-position structure, destroys the regular structure of macromolecules, and makes dye molecules easy to enter polyester. When the temperature of the kettle reaches 240°C, depressurize the system, and gradually raise the temperature of the kettle to 290°C, and control the vacuum pressure below 100 Pa for 1.42 hours. After the reaction is completed, pressurize nitrogen and discharge the material.

[0035] b) Dry by hot air flow. Af...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to double-yarn air-spliced high-color-fastness polyester staple fiber and a preparation method. The double-yarn air-spliced high-color-fastness polyester staple fiber comprises an outer layer, a core layer and a leaf part for connecting the outer layer and the core layer; the cross section of the outer layer is in a circular ring shape; the leaf part is composed of six leaf-shaped connecting pieces; the connecting pieces are distributed on the outer side of the core layer in an annular array mode; and the center of the core layer is a hexagonal cavity. High-color-fastness polyester staple fiber is prepared from dimethyl terephthalate, ethylene glycol, potassium hydroxide, dipropylene glycol isophthalate-5-sodium sulfonate and other raw materials; double-yarn air splicing operation is carried out through an air splicer; bicarbonate, ammonium salt and distilled water are mixed and stirred; dye and a complexing agent are added, a mixture is stirred uniformly to form a standby dye liquor; and a fabric and the dye liquor are put into a dye cup with a sealing effect to obtain the double-yarn air-spliced high-color-fastness polyester staple fiber. The method has an obvious dyeing accelerating effect on polyester and blended fabrics thereof, has high color fastness, and is low in toxicity and environment-friendly.

Description

technical field [0001] The invention belongs to the field of synthetic fiber production methods, in particular to double-yarn air-spliced ​​polyester staple fibers with high color fastness and a preparation method. Background technique [0002] At present, polyester staple fibers are mainly dyed with disperse dyes. However, due to the different particle sizes of disperse dyes, small particles can easily enter the interior of the fiber, and large particles can enter the interior of the fiber after a certain period of time and temperature, which can easily cause surface floating. And as the baking temperature rises, the dye sublimates, which will cause the polyester fiber to be darkened. Under alkaline conditions, some groups with poor alkali resistance and stability in the molecular structure of the dye, such as ester groups, cyano groups, amide groups, etc. Hydrolysis will occur, destroying the color system of the dye. [0003] The existing Chinese patent No. ZL 20171040935...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/688D06P1/41D06P3/52D01D5/088D01D5/24D01D5/253D01H4/02
CPCD01F6/84C08G63/6886D01D5/253D01D5/088D01H4/02D01D5/24D06P1/41D06P3/522
Inventor 李鹤
Owner 浙江光乾纺织有限公司
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