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Dyeing agent for disperse dyeing of polyimide fiber products

A polyimide fiber and disperse dye technology, applied in the field of dyeing and finishing, can solve the problems of increasing waste water treatment, difficulty in industrial application, increasing dyeing cost, etc., and achieve the effects of shortening production cycle, convenient source of raw materials, and convenient dyeing method.

Active Publication Date: 2017-09-15
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires complex pretreatment of polyimide fibers, the process is cumbersome, the cost of dyeing is increased, the problem of wastewater treatment is increased, and industrial application is difficult

Method used

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  • Dyeing agent for disperse dyeing of polyimide fiber products
  • Dyeing agent for disperse dyeing of polyimide fiber products
  • Dyeing agent for disperse dyeing of polyimide fiber products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: the preparation of dye-inducing agent

[0033] Polyimide Hansen Solubility Parameter δ t Calculate the solubility parameter δ of polyimide fiber by using the group contribution method proposed by Hoftyzer-Van Krevelen t =21.2(J / cm 3 ) 1 / 2 . The group contribution constants required to calculate the polyimide solubility parameters are shown in Table 1; the main equation is as follows:

[0034]

[0035]

[0036]

[0037] Where: V m is the molar volume of the substance molecule; F di , F pi and E hi are the dispersion term, dipole term and hydrogen bond term of the group contribution constant; δ d ,δ p and δ h and are the dispersion term, dipole term and hydrogen bond term of the Hansen solubility parameter calculated by the group contribution method, respectively.

[0038] Table 1 Group contribution value of solubility parameter components

[0039]

[0040]The dye-introducing agent of the present invention is selected according to t...

Embodiment 2

[0047] At a bath ratio of 1:20, the amount of disperse blue dye is 3.5% o.w.f, the amount of dye guide agent is 75g / L, the amount of penetrant is 2mL / L, and the amount of acetic acid is 0.5g / L (pH=5-6). After the dye solution is prepared, pour it into the dyeing cup, add polyimide fiber or fabric wetted with deionized water, and place the sealed dyeing cup in the dyeing machine for high-temperature and high-pressure dyeing. Wherein the dyeing agent is obtained by mixing n-octanol and 2-ethylbutanol in a certain proportion, and the solubility parameter after mixing is 21.3 (J / cm 3 ) 1 / 2 about.

[0048] The dyeing process is as follows: dyeing at room temperature, heating up to 130°C at 3°C / min, then holding for 30 minutes, then cooling down to 80°C at 4°C / min, taking out, washing with water, reduction cleaning, washing with water, and drying. The reduction cleaning process is: hydrosulfite 2g / L, sodium carbonate 2g / L, bath ratio 1:50, temperature 80°C, time 10min.

Embodiment 3

[0050] At a bath ratio of 1:20, the amount of disperse red dye is 3.5% o.w.f, the amount of dye guide agent is 75g / L, the amount of penetrant is 2mL / L, and the amount of acetic acid is 0.5g / L (pH=5-6). After the dye solution is prepared, pour it into the dyeing cup, add polyimide fiber wetted with deionized water, and place the sealed dyeing cup in the dyeing machine for high-temperature and high-pressure dyeing. Among them, the dye-inducing agent is obtained by mixing cyclohexanol and methyl isobutyl carbinol in a certain proportion, and the solubility parameter after mixing is 20.8 (J / cm 3 ) 1 / 2 about.

[0051] The dyeing process is as follows: dyeing at room temperature, heating up to 130°C at 3°C / min, then holding for 30 minutes, then cooling down to 80°C at 4°C / min, taking out, washing with water, reduction cleaning, washing with water, and drying. The reduction cleaning process is: hydrosulfite 2g / L, sodium carbonate 2g / L, bath ratio 1:50, temperature 80°C, time 10min....

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Abstract

The invention relates to a dye-conducting agent for disperse dye dyeing of polyimide fiber products, which belongs to the technical field of dyeing and finishing. The dye-conducting agent of the present invention is convenient, effective, safe, eco-friendly and has a high boiling point, can be used for high-temperature and high-pressure dyeing, promotes the swelling of polyimide fibers, increases the dissolved amount of dyes, improves the dye uptake rate of dyes, and is suitable for polyimides. Fiber dyeing has the effect of promoting dyeing, and it is easy to dye darker colors. It can realize high-temperature and high-pressure dyeing of polyimide, with high color yield and excellent color fastness, which meets national standards, making the industrialization of polyimide dyeing a possible.

Description

technical field [0001] The invention relates to a dye-conducting agent for disperse dye dyeing of polyimide fiber products, which belongs to the technical field of dyeing and finishing. Background technique [0002] Polyimide (PI) refers to a class of high-performance polymers containing imide rings on the main chain, and its molecular structure is as follows: [0003] [0004] The fiber is natural yellow-brown, has good thermal oxidation stability, excellent mechanical properties, radiation resistance and insulation properties, and has a wide range of applications. PI fiber has excellent high temperature resistance, radiation resistance, high strength and high modulus, and has good comprehensive applicability compared with aramid fiber and polyphenylene sulfide fiber. Its limiting oxygen index is >38%, and it has non-melting properties. , and self-extinguishing away from the fire; high and low temperature resistance, can be used stably in high and low temperature env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/16D06P3/02D06P1/651D06P1/642
Inventor 王树根伍双燕钱俊许长海孙昌吴敏蒋静田秀枝
Owner JIANGNAN UNIV
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