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Sharing of cationic dye dyeing and dyeing process to prevent the production of color -colored stains

Views: 2     Author: Site Editor     Publish Time: 2023-01-24      Origin: Site Inquire

Dyeing method

(1) Most of the pyrum -in -dye -in -law pure texture products are dyed with immersion infection. Dye baths usually contain dyes, cationic mild dyes, sodium sulfate, acetate, sodium acetate, etc. The cedic slow -dyes and sodium sulfate are used to improve the dye dyeing performance. The acetic acid and sodium acetate form a buffer solution, so that the dye solution is kept within the appropriate pH range (usually about 4 to 5) dyes. Stir half well, then add a certain amount of water to make the flowing pulp, add boiling water to dissolve the dye to get the solution, add the remaining half of the acetic acid and sodium acetate to the dye bath, add 0-20%(fiber weight) Sodium-free sodium sulfate and cationic slow-dyed agent, filter dye solution into the dye bath, stir well, stain the Louobi from 50-60 ° C, heat up to 70 ° C, then heat up at about 1 ° C per minute, about 1 ° C per minute The rate of heating up to boiling is boiled according to the form of color and dye, slowly cooling (1-2 ℃ min) to 50 ° C, and then washing and other treatment.

At present, the commonly used cedic slow -dyeing agent has 1227 surfactants and 1631 surfactants (also known as even dye PAN). The dosage of cation with ions should be determined based on the dye concentration, the dye performance dye saturation value (saturated coefficient) of the dye, the performance of cation slowly dye, and equipment conditions.

If the dyeing rate of dyeing is high, and the cycle rate of the dye solution is relatively low, the amount of sustained dyeing agent is more. (In addition to the above -mentioned cationic sustained dyeing agent, there are some auxiliary agents with weak dyeing effects, such as evenly dyed salt An and even dye agents SN.) Actual production is generally used

70 ℃ dye, dye 5mn,

At a heating rate of 1C/3min, heating up to 90C;

After dyeing 30-60min,

At a rate of 1 ℃/2-3min, heating up to boiling, boiling dyeing 30-60min;

Then cool down at a rate of 1 ℃/min to 80 ° C,

Continue to cool down to 50-60 ° C.

The performance of the first dyeing temperature visual fiber depends on the performance and dyeing rate, and it is generally advisable to transform the temperature of the fiber glass. Slowly heating up near the glass conversion temperature.

When the dyeing is light, the initial dyeing temperature should be lower, and the heating rate should be slower. When dyeing dark color, the temperature can be higher, and the temperature increase rate can be appropriately accelerated. Due to the poor diffusion performance of cationic dyes on acrylic, boiling dyeing is conducive to the full diffusion of dyes in the fiber, reducing the ring dye, and making the upper dye of the dye more fully to increase the percentage of the upper dye. This temperature is high, which is conducive to the dye dye and evenly dye.

2) The form of the rolling dye table and the depth of the color of the dyeing solution are similar to that of the dyeing solution. In addition to containing dyes, there are also acetic acid, sodium acetic acid, Yuanming powder, and cation with cation. The dissolution of dyes and the preparation of dyeing liquids are as before. 60 ° C began to dye, and after 4, the temperature was increased to 98-100 ° C. The boiling dyeing time was maintained with the number of lanes required for 6090 minutes. The rolled dyeing machine used should be an equivalent roll -up machine. When dyeing, the tension of the fabric may be small, otherwise it will affect the fabric feel

(3) Dyeing method feels by the machine. When dyeing, the tension and dyeing of the fabric are mainly used for acrylic silk beams and less, so rarely use rolling dyes. The dyeing process has two sections of the second part of the dyeing process and the heat solubility method. Process process of steaming method:

After soaking, pass through 100-103 ℃

Steaming 10-45min,

Wash and wait for it. The rolling solution contains dyes, solvents, dyes, acid or strong acid or weak alkali salts, and a small amount of anti -rolling agent. The dyes used for rolling dyes should have good solubility and diffusion. To help dissolve dyes, appropriate solvents can be used. The diffusion of cationic dyes in acrylic is slow. In order to obtain uniform dyes, there must be a long steam time. Steaming time depends on factors such as the diffusion of dyes, dyeing concentration, steam temperature, and dyeing.

Generally speaking, the longer the steaming time, the more solid the color. The purpose of using dye promotional agents is to shorten the steam time. The role is mainly to make acrylic swelling, which is conducive to the diffusion of dyes. The infected agents include carbonate, carbonate, carbonate, urea/oil (1: 1), pyrethiamine, and phenylphenol. Ethyl carbonate is a solvent for acrylics, and the amount should not be too much, otherwise it will damage the fiber and make it feel hard. The pH value of the dyeing liquid is generally adjusted with acetic acid. Because the acetic acid is easy to volatilize when the temperature is high, it can add appropriate ammonium salt, such as ammonium sulfate, ammonia to escape when steaming, so that when the fabric is washing a certain pH, it can be washed. Adding an appropriate amount of acetic acid to the sink is conducive to cleaning the floating color, especially when the dye concentration is high. Thermal solubility rolling dyeing is mainly used for dyeing of polyester pupae mixed textiles. Pure acrylic fabrics or acrylics and other fiber-mixed textiles-do not use thermal solubility and thermal solubility method to roll dyeing polyesterly textile fabrics. Generally, decentralized dyes and cationic dyes are bathing in the same bath, that is, one bathing method is rolled.

Because the decentralized dye contains a large amount of nagnine -type decentralizers, which can be combined with cationic dyes to make the dye solution unstable, so the cationic dye is preceded into a scattered cationic dye, so that the dispersed cationic dyes and decentralized dyes are scattered at the same time in the same time. The process of dyeing dyeing in the dye dyeing in the water is similar to the dyeing method of dyeing dyes. Its process is soaking> drying-> hot solubility> post -treatment. The hot-soluble conditions are 190-200 ° C. 1-min dye contains decentralized cationic dyes, acetic acid, infected agents, acid release agents, non-ion surfactants, and a small amount of paste. The principle and purpose of the dyeing agent for dyeing thermal dyeing method is the same as the dyeing method. The use of dyeing agents can reduce thermal solution time, improve solidification and transmission. After experimentation, the use of urea and carbonate has a good effect. When using urea, color and permeability increased as the amount of urea increased. According to reports, the amount of urea needs to be more than 70gl before it can have a good effect. If 40gl of urea and 5glβ-phenol are used, the basic effects can be achieved. However, the B-forbids must be fully dissolved with ethanol before the dyeing solution can be added, otherwise it will cause precipitation. The pH value of the dyeing liquid with acetic acid is 4-5. Due to the volatile of acetic acid, the pH value can be used to stabilize the pH during the dyeing process. 19. The effect of using ammonium sulfate is poor. The non -ion surface active agent is used to improve the stability and permeability of the dye liquid, and it is not advisable to use anion type, so as not to combine with some cationic dyes to generate a binding binding. Dye color fixation rate.

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