Method for dyeing aramid fiber without carrier

A dyeing method and carrier-free technology, which is applied in the field of textile printing and dyeing, can solve the problems of increased yarn or fabric cost, increased dyeing cost, and inability to recycle, and achieve the effects of reducing dyeing cost, ideal dyeing effect, and protecting the environment

Active Publication Date: 2013-04-17
CHANGSHU BAOFENG SPECIAL FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the glass transition temperature of aramid fiber can be reduced by adding such a carrier, it has the following defects: one is that the cost of dyeing is increased due to the higher price of the carrier, which eventually increases the cost of aramid fiber, yarn or fabric; Carriers are organic substances such as aromatic ketones (Armatic Ketones) are organic chemical raw materials that cannot be easily oxidized by weak oxidants and cannot be recycled, thus polluting the environment

Method used

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  • Method for dyeing aramid fiber without carrier
  • Method for dyeing aramid fiber without carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Take the dyeing of 1313 fiber as an example.

[0028] A) To prepare a dyeing bath, first pour water into the dyeing container, control the bath ratio to 1:50, then add disperse dye, disperse red 3B, into the dyeing container, the amount of disperse red 3B is 15% (o.w.f) and used as a leveling agent Add O (alkyl polyoxyethylene ether) 10g / L to Pingping, and then use acetic acid as a buffer to adjust the pH of the dye bath to 6;

[0029] B) Dyeing, first soak the aramid 1313 fiber in clean water, then squeeze the water dry and put it into the dyeing bath, then put the dyeing container into the dyeing machine for dyeing, the dyeing temperature of the dyeing machine is controlled at 150°C and the dyeing time The dyeing pressure is controlled at 90min, and the dyeing pressure is controlled at 0.43MPa. After leaving the dyeing machine, the dyed aramid 1313 fiber is taken out of the dyeing container, and then washed, reduced and washed with water in sequence according to the co...

Embodiment 2

[0044] Take the dyeing of aramid 1313 yarn as an example.

[0045]Only change the bath ratio in step A) to 1:10, change the dye to disperse blue 2BLN, and change the dosage to 0.02% (o.w.f), change the dosage of leveling agent O to 20g / L, and change the buffer Use citric acid instead, and change the pH value to 5.6; only change the dyeing temperature, dyeing time, and dyeing pressure in step B) to 220°C, 30min, and 2.3MPa, respectively, to obtain blue aramid 1313 yarn, and the rest are Same as the description of embodiment 1.

Embodiment 3

[0047] Take the dyeing of aramid 1313 fabric as an example.

[0048] Only change the bath ratio in step A) to 1:35, change the dye to cationic red 2GL, and change the dosage of cationic red 2GL to 10% (o.w.f), change the dosage of Pingpingjiao to 5g / L, change Change the buffer to formic acid and change the pH value to 4; only change the dyeing temperature, dyeing time and dyeing pressure in step B) to 170°C, 45min and 0.9MPa respectively to obtain a red aramid 1313 fabric, and the rest are the same Description of Example 1.

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Abstract

The invention relates to a method for dyeing aramid fiber without a carrier, belonging to the technical field of spinning, printing and dyeing. The method comprises the following steps of: preparing a dyeing bath: injecting water into a dyeing container, controlling the bath ratio, adding 0.01-15% (by o.w.f) of dye and 5-20g/L of a levelling agent into the dyeing container, and adding a buffering agent to adjust the pH value to 4-6; and dyeing: soaking the aramid fiber into water, removing the water in the aramid fiber, putting the aramid fiber in the dyeing bath, putting the dyeing container into a dyeing machine to dye, controlling the dyeing temperature, time and pressure of the dyeing machine, taking the dyeing container out of the dyeing machine, taking the aramid fiber out of the dyeing container, and washing with water, cleaning by reducing, washing with water and drying in sequence to obtain the dyed aramid fiber. Because the dyeing bath is prepared reasonably, the aramid fiber is soaked before being introduced into the dyeing bath, is dried after being soaked and is dyed under the set dyeing temperature, time and pressure, the defect of using the carrier in the prior art is avoided. The method can not cause pollution to the environment and achieves an ideal aramid fiber dyeing effect, and the aramid fiber dyeing cost is reduced due to the adoption of the method.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and in particular relates to a carrierless dyeing method for aramid fiber. Background technique [0002] The full name of aramid fiber is aromatic polyamide, which is a high-strength, high-modulus, low-density and high-temperature-resistant flame-retardant material with good wear resistance. Due to its good chemical stability and excellent mechanical and physical properties, it is not only It can be used as structural material and functional material alone, and can also be used in combination with other materials. [0003] Aramid is the collective name of meta-aramid and para-aramid. The chemical name of meta-aramid is polyisophthalamide m-phenylene diamine fiber. In my country, it is called aramid 1313. Its limiting oxygen index (LO1) is 29. There will be no droplet phenomenon in the flame, and it will self-extinguish when it leaves the flame. At a high temperature of around...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/04D06P1/16D06B21/00D06B23/00D06B23/22
Inventor 王树根钱俊陆宏波蒋静田秀枝华江楠王梦琴
Owner CHANGSHU BAOFENG SPECIAL FIBER
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