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Normal-pressure dyeing method of meta-aramid yarn

A aramid yarn, atmospheric dyeing technology, applied in the field of textile printing and dyeing, can solve the problems of strict equipment requirements, fragile and fiber, waste of energy, etc., to achieve ideal flame retardancy, excellent heat resistance, physical and chemical Stable performance

Active Publication Date: 2012-01-11
CHANGSHU BAOFENG SPECIAL FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the pretreatment step and dyeing step of the aforementioned CN100467712C adopt high pressures of 8-10MPa and 0.7-1MPa respectively, and use a high temperature of 150-180°C in the dyeing step, so there are also harsh equipment requirements, cumbersome processes, fragile and fiber and energy-wasting technical problems

Method used

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  • Normal-pressure dyeing method of meta-aramid yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A) Coarsening of meta-aramid yarns, the roughening process is: sodium hydroxide 20g / L, penetrating agent JFC 2g / L, bath ratio 1:20, temperature 95°C, time 30min, after roughening, heat Washing with water to a pH of 9-10 to obtain a meta-aramid yarn with a roughened fiber surface. This step can roughen and etch the surface of the meta-aramid fiber, increase the surface area of ​​the fiber, and at the same time relieve the fiber itself;

[0032] B) Activation of the meta-aramid yarn, the activation of the meta-aramid yarn whose fiber surface is roughened by step A), the specific process is: adding a cationic modifier (polyepichlorohydrin aminate) 15g / L, liquor ratio 1:20, temperature 60°C, and time 40min. After activation, the preferred solution is to fully wash with water to obtain meta-aramid yarn to be dyed. The function of this step is to Cationic groups are introduced into the rayon yarn, so that the surface of the meta-aramid yarn is positively charged, and the elec...

Embodiment 2

[0035]A) Coarsening of meta-aramid yarns, the roughening process is: sodium hydroxide 10g / L, penetrant JFC 1g / L, bath ratio 1:15, temperature 98°C, time 20min, and the rest are the same as in Example 1 a description of step A);

[0036] B) Activation of meta-aramid yarn, the activation process is as follows: the amount of cationic modifier is changed to 20g / L, the bath ratio is 1:25, the temperature is changed to 90°C, and the time is changed to 30min. After the activation, this step The content not involved in is all the same as the description to step B) of embodiment 1;

[0037] C) Dyeing of meta-aramid yarn, this step adopts direct dye for dyeing, and the specific process is: direct brown 5G dye 4% (o.w.f), Yuanming powder 12g / L, pH control is 6, liquor ratio 1: 20. The dyeing temperature is 92° C., the dyeing time is 60 min, and the rest are the same as the description of step C) in Example 1.

Embodiment 3

[0039] A) Coarsening of meta-aramid yarns, the roughening process is: mass percentage concentration is 85% phosphoric acid 15g / L, bath ratio 1: 12, temperature 90 ℃, time 25min, all the other are the same as step A of embodiment 1 )description of;

[0040] B) Activation of meta-aramid yarn, the activation process is: cationic modifier 10g / L, bath ratio 1:30, temperature 80°C, time 35min, the content not involved in this step is the same as that of Example 1 a description of step B);

[0041] C) Dyeing of meta-aramid yarns, the specific process is: Nylon mountain red N-3BL dye 5% (o.w.f), adjust pH to 6 with glacial acetic acid, sodium sulfate 20g / L, bath ratio 1: 15, The dyeing temperature is 98° C., and the dyeing time is 40 min. The content not involved in this step is the same as the description of step C) of Example 1.

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Abstract

The invention relates to a normal-pressure dyeing method of a meta-aramid yarn, belonging to the technical field of textile printing and dyeing. The method comprises the following steps: coarsening the meta-aramid yarn, wherein the coarsening process is as follows: acid or alkali is 10-20 g / L, a penetrant is no more than 2 g / L, the bath ratio is 1:10-20, the temperature is 90-100 DEG C, and the time is 20-30 min; then, washing with water to obtain the meta-aramid yarn with a coarsened fiber surface; activating the meta-aramid yarn with coarsened fiber surface, wherein the activating process of the meta-aramid yarn with a coarsened fiber surface is as follows: a cation modifier is 10-20 g / L, the bath ratio is 1:20-30, the temperature is 60-90 DEG C, and the time is 30-40 min; and finally, dyeing the meta-aramid yarn, i.e. dyeing the meta-aramid yarn to be dyed under the normal pressure to obtain a colored meta-aramid yarn. The invention is beneficial to saving energy, avoids damage to fibers, has no stringent requirements on the dyeing device and facilitates the operation. Besides, the invention realizes that the fabric subjected to subsequent processing can be provided with required patterns in accordance with the weaving process.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and in particular relates to an atmospheric pressure dyeing method for meta-aramid yarns. Background technique [0002] Aramid fiber is called aromatic polyamide fiber. It is a kind of high-strength, high-modulus, low-density and high-temperature-resistant flame-retardant fiber 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 (L01) is 29. There will be no droplet phenomenon in the flame, and it will self-extinguish when it leaves the flame. At a high temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/24D06P1/39D06P1/38D06M11/70D06M11/38D06M15/53D06M101/36
Inventor 钱世荣
Owner CHANGSHU BAOFENG SPECIAL FIBER
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