阅读说明：本技术 一种防固色斑的染色工艺 (Dyeing process for preventing color spots ) 是由 许金升 谢贵华 周行志 朱艳丽 胡文广 于 2021-08-09 设计创作，主要内容包括：本发明涉及纺织染整技术领域,具体指一种防固色斑的染色工艺,该工艺以含有锦纶的织物为待染织物,其特征在于：包括以下步骤：步骤一：对织物进行前处理；步骤二：对步骤一处理后的织物进行染色；步骤三：对步骤二处理后的织物进行固色,其固色工艺的助剂包括：固色剂,冰醋酸和分散剂；步骤四：对步骤三固色后的锦纶织物采用清水洗涤并烘干。本发明本工艺减少了生产步骤,有效减低了水、电、起汽、化学助剂的用量,控制了生产成本,为企业提升了竞争力,同时固色后无需用碱和酸清洗,不仅提高了生产效率,节约了生产时间和能源,且降低了污水排放,也起到了节能减排的作用。(The invention relates to the technical field of textile dyeing and finishing, in particular to a dyeing process for preventing color spots, which takes a fabric containing chinlon as a fabric to be dyed and is characterized in that: the method comprises the following steps: the method comprises the following steps: pretreating the fabric; step two: dyeing the fabric treated in the step one; step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: a color fixing agent, glacial acetic acid and a dispersant; step four: and (5) washing the nylon fabric subjected to color fixation in the step three by using clean water and drying. The process provided by the invention reduces production steps, effectively reduces the consumption of water, electricity, steam and chemical additives, controls the production cost, improves the competitiveness of enterprises, and simultaneously does not need alkali and acid cleaning after color fixation, thereby improving the production efficiency, saving the production time and energy, reducing the sewage discharge, and playing a role in energy conservation and emission reduction.)

1. A dyeing process for preventing color spots from being fixed takes a fabric containing chinlon as a fabric to be dyed, and is characterized in that: the method comprises the following steps:

the method comprises the following steps: pretreating the fabric;

step two: dyeing the fabric treated in the step one;

step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: a color fixing agent, glacial acetic acid and a dispersant;

step four: and (5) washing the fabric subjected to color fixing in the step three by using clean water and drying.

2. The dyeing process for preventing color stains according to claim 1, wherein the dyeing process comprises the following steps: in the third step, the dosage of the color fixing agent is 2-5g/L, the dosage of the glacial acetic acid is 0.5-3g/L, and the dosage of the dispersant is 0.2-0.8 g/L.

3. The dyeing process for preventing color stains according to claim 2, wherein: in the third step, the color fixing agent is a sulfonic acid condensation compound.

4. The dyeing process for preventing color stains according to claim 2, wherein: in the third step, the dispersant is Niccasunsyllts dispersant for daily use.

5. The dyeing process for preventing color stains according to claim 2, wherein: in the third step, the color fixing temperature in the color fixing process is 60-80 ℃, and the color fixing time is 15-40 min.

6. The dyeing process for preventing color stains according to claim 2, wherein: in the second step, the dyeing process comprises the following steps: preparing a dye solution, placing the polyamide fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise an acidic leveling agent, glacial acetic acid and an acidic dye, heating the fabric to 65-95 ℃ at a constant speed, preserving heat for 70-90min, and cooling to 60-70 ℃ at a constant speed after finishing, and discharging the liquor.

7. The process of claim 6, wherein the stain is prevented from being fixed by: the temperature rising speed of the dye liquor is 1-1.5 ℃/min, and the temperature reducing speed of the dye liquor is 1.5-2.5 ℃/min.

8. The process of claim 6, wherein the stain is prevented from being fixed by: in the second step, the dye solution also comprises sodium acetate, and the pH value of the dyeing is 4.5-6.5.

9. The process of claim 6, wherein the stain is prevented from being fixed by: in the fourth step, the water is washed at 50-70 ℃ and then at 20-40 ℃.

10. A process according to any one of claims 1 to 9 for dyeing with stain repellence, characterised in that: the process is applied to dyeing of the nylon fabric, the nylon blended yarn fabric or the nylon yarn interwoven fabric for preventing color spots from being fixed.

Technical Field

The invention relates to the technical field of textile dyeing and finishing, in particular to a dyeing process for preventing color spots.

Background

As most of shoe material fabrics are formed by blending terylene, modified terylene, chinlon and other fabrics, a color fixing process after chinlon dyeing is needed in the aspect of chinlon dyeing. However, color fixing spots of different degrees often appear when polyamide acid dye is used for color fixing, and in the color fixing process, adhesive condensate of different degrees is generated to be attached to the surface of fabric. After the fixing, the formation of dark spots (lumps) on the surface which are difficult to remove is called fixed spots.

The color fixing spots are common problems in nylon dyeing and occur more frequently in a dry season and a rich season. And also relates to the color fixing agent used. In most cases, the better the fixing, the higher the chance of a fixed stain.

Nylon acidic fixing agents are typically anionic sulfonic acid condensates. The wet fastness and staining fastness of the nylon are improved by bridging with dyes and fiber molecules.

When the nylon acid color fixing agent is used, color fixing agent spots often appear, so that the dyeing quality is reduced. The mechanism of the nylon acid dye color fixing agent is as follows:

the rationale for nylon fixation is believed to be the film-forming theory. The color fixing agent is a macromolecular compound, contains a plurality of sulfonate groups and is bonded with the tail end amino group of the nylon fiber to form a net structure to coat the dye, so that the washing fastness can be ensured and improved.

1. The use process of the nylon fixing agent is as follows:

temperature: 70-80 deg.C

②PH:3.5-4.5

Time: 20-30min

The color fixing effect is negatively influenced by too high or too low color fixing temperature, and the color fixing agent is not completely absorbed when the temperature is too low. At too high a temperature, too much dye fixing agent penetrates into the fibers, compromising the film forming effect, both affecting the fastness.

2. The main reason for the generation of nylon fixation spots

The total hardness of the water (Ca + +, Mg + +) is too high

Secondly, because the attachments of the fabric can not be removed completely, many weaving mills now aim at improving efficiency. The oil agent/lake agent used for reducing the cost is changed, so the used refining agent is selected, and the oil agent on the fabric is removed completely and then the subsequent dyeing process is carried out.

Thirdly, the residue of weak cation auxiliary agent on the dyed cloth surface.

Reason for the fixing agent itself: such as poor water solubility, poor acid resistance, and poor storage stability.

The generation of color fixing spots can seriously affect the quality of the fabric and bring technical troubles to dyeing and finishing production.

Disclosure of Invention

In order to solve the technical problems, the invention provides a dyeing process for preventing color spots, which effectively prevents color spots from being generated by adding an auxiliary agent in the color fixing process of the fabric.

A dyeing process for preventing color spots from being fixed takes a fabric containing chinlon as a fabric to be dyed, and comprises the following steps:

the method comprises the following steps: pretreating the fabric;

step two: dyeing the fabric treated in the step one;

step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: a color fixing agent, glacial acetic acid and a dispersant;

step four: and (5) washing the fabric subjected to color fixing in the step three by using clean water and drying.

Furthermore, in the third step, the dosage of the color fixing agent is 2-5g/L, the dosage of the glacial acetic acid is 0.5-3g/L, and the dosage of the dispersing agent is 0.2-0.8 g/L.

Further, in the third step, the color fixing agent is a sulfonic acid condensation compound.

Further, in the third step, the dispersant is Niccasunsyllts daily chemical dispersant.

Further, in the third step, the color fixing temperature in the color fixing process is 60-80 ℃, and the color fixing time is 15-40 min.

Further, in the second step, the dyeing process is as follows: preparing a dye solution, placing the polyamide fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise an acidic leveling agent, glacial acetic acid and an acidic dye, heating the fabric to 65-95 ℃ at a constant speed, keeping the temperature for 70-90min, and cooling to 60-70 ℃ at a constant speed to discharge liquid after the temperature is up.

Further, the temperature rising speed of the dye solution is 1-1.5 ℃/min, and the temperature reducing speed of the dye solution is 1.5-2.5 ℃/min.

Further, in the second step, the dye solution also comprises sodium acetate, and the pH value of the dyeing is 4.5-6.5.

Furthermore, in the fourth step, the washing is carried out at 50-70 ℃ and then at 20-40 ℃.

Further, the process is applied to dyeing of the nylon fabric, the nylon blended yarn fabric or the nylon yarn interwoven fabric for preventing color fixing spots.

Compared with the prior art, the invention has the beneficial effects that:

1. compared with the traditional process, the process has the advantages that: the traditional process is completed by 6 steps from dyeing to cloth discharging, namely dyeing, cleaning, color fixing, alkali cleaning, acid neutralizing, cleaning and cloth discharging, and can cause color instability, the process is completed by 4 steps, namely dyeing, cleaning, color fixing, cleaning and cloth discharging are only needed, and no subsequent alkali treatment and acid treatment are needed, so that the color is not influenced.

2. The cost of water, electricity, steam, auxiliary agents and the like is saved in the aspect of cost, and the dyeing efficiency is also improved. The production time is saved by about 1-2 hours, and the competitiveness of the company is improved in the aspect of market competition.

3. The operation is very simple, and the acidic color fixing agent is easy to coagulate and generate precipitate when being mixed with acid. And the color fixing agent is adhered to the cloth surface to form color fixing spots during color fixing. During material melting, the high-concentration color fixing agent is not completely dissolved and is fed, so that great trouble is caused to the operation of production workers. The dispersing agent is added during the material melting process, so that the material melting process is easier to operate, and the material melting process also has an auxiliary effect during operation.

4. The production cost can also well improve the competitiveness, and the production efficiency is improved because the process reduces the production steps and does not need to be washed by alkali and acid. The saving of production time and acid and alkali also play a role in energy conservation and emission reduction on sewage environmental protection.

5. When finishing the fixation, traditional technology need add the alkaline washing and prevent the production of solid color spot, but in the cleaning process, because staff's misoperation often can cause the loss of colour to make the colour that originally accords with customer's requirement appear the deviation, causes to restore the colour again. The process avoids the defects of the traditional process, can well ensure that the color accuracy is not lost, and improves the one-time success rate.

Detailed Description

The invention will be further illustrated with reference to the following examples.

Embodiment one

The embodiment provides a dyeing process for preventing color spots of pure nylon warp-knitted fabric, which takes the nylon-containing fabric as the fabric to be dyed and comprises the following steps:

the method comprises the following steps: pretreating the fabric;

step two: dyeing the fabric treated in the step one;

step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: a color fixing agent, glacial acetic acid and a dispersant;

step four: and (5) washing the nylon fabric subjected to color fixation in the step three by using clean water and drying.

Example 1

In this embodiment, the color fixing spot prevention dyeing is performed on the layer warp-knitted nylon fabric woven by 150D nylon, and the process is as follows:

the method comprises the following steps: pretreating the fabric; the procedure is the same as the conventional dyeing process;

step two: dyeing the fabric treated in the first step, firstly preparing a dye solution, placing the polyamide fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise 1.2g/L of an acidic leveling agent, 2.0g/L of glacial acetic acid and 4% (owf) of an acidic dye, heating the fabric to 85 ℃ at a constant speed, preserving heat for 70min, and cooling to 65 ℃ at a constant speed after finishing, and discharging liquid; the temperature rising speed of the dye liquor is 1 ℃/min, and the temperature reducing speed of the dye liquor is 1.5-DEG C/min; in order to keep the pH value of the dye liquor stable, sodium acetate can be added into the dye liquor, and the pH value of the dye liquor is stably controlled to be 5-5.5.

Step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: the dye-fixing agent comprises a color fixing agent, glacial acetic acid and a dispersing agent, wherein the color fixing agent is an acidic color fixing agent, the specific type of the color fixing agent is a sulfonic acid condensation compound, the dosage of the color fixing agent is 2.5g/L, and the dosage of the glacial acetic acid is 1.5 g/L; the dispersant is NiccasunsylLTCS dispersant, and the dosage of the dispersant is 0.4 g/L; and in the color fixing process, the color fixing temperature is controlled at 70 ℃, and the color fixing time is 25 min.

Step four: and (3) washing the nylon fabric subjected to color fixation in the third step by using clean water and drying, wherein the washing is carried out at 50-70 ℃ and then at 20-40 ℃.

After washing, the fabric can be subjected to after-finishing processes such as shaping and the like, then subjected to QC goods inspection, and finally rolled, packaged and warehoused.

Example 2

In this embodiment, the color fixing spot prevention dyeing is performed on the double-layer warp-knitted nylon fabric woven by 250D nylon, and the process thereof is as follows:

the method comprises the following steps: pretreating the fabric; the procedure is the same as the conventional dyeing process;

step two: dyeing the fabric treated in the first step, firstly preparing a dye solution, placing the polyamide fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise 1.5g/L of an acidic leveling agent, 2.0g/L of glacial acetic acid and 3% (owf) of an acidic dye, heating the fabric to 85 ℃ at a constant speed, preserving heat for 80min, and cooling to 70 ℃ at a constant speed after finishing, and discharging liquid; the temperature rising speed of the dye liquor is 1 ℃/min, and the temperature reducing speed of the dye liquor is 1.5 ℃/min; in order to keep the pH value of the dye liquor stable, sodium acetate can be added into the dye liquor, and the pH value of the dye liquor is stably controlled to be 4.5-5.5.

Step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: the dye-fixing agent comprises a color fixing agent, glacial acetic acid and a dispersing agent, wherein the color fixing agent is an acidic color fixing agent, the specific type of the color fixing agent is a sulfonic acid condensation compound, the dosage of the color fixing agent is 2.5g/L, and the dosage of the glacial acetic acid is 1.5 g/L; the dispersant is NiccasunsylLTCS dispersant, and the dosage of the dispersant is 0.5 g/L; and in the color fixing process, the color fixing temperature is controlled at 75 ℃, and the color fixing time is 30 min.

Step four: and (3) washing the nylon fabric subjected to color fixation in the third step by using clean water and drying, wherein the washing is carried out at 50-70 ℃ and then at 20-40 ℃.

After washing, the fabric can be subjected to after-finishing processes such as shaping and the like, then subjected to QC goods inspection, and finally rolled, packaged and warehoused.

Example 3

The embodiment aims at carrying out color fixation spot prevention dyeing on a double-layer weft-knitted nylon fabric woven by 200D nylon, and the process comprises the following steps:

the method comprises the following steps: pretreating the fabric; the procedure is the same as the conventional dyeing process;

step two: dyeing the fabric treated in the first step, firstly preparing a dye solution, placing the polyamide fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise 1.5g/L of an acidic leveling agent, 2.5g/L of glacial acetic acid and 2.5% (owf) of an acidic dye, heating the fabric to 90 ℃ at a constant speed, preserving the temperature for 70min, and cooling to 70 ℃ at a constant speed after finishing draining; the temperature rising speed of the dye liquor is 1 ℃/min, and the temperature reducing speed of the dye liquor is 1.5 ℃/min; in order to keep the pH value of the dye liquor stable, sodium acetate can be added into the dye liquor, and the pH value of the dye liquor is stably controlled to be 4.5-5.5.

Step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: the dye-fixing agent comprises a color fixing agent, glacial acetic acid and a dispersing agent, wherein the color fixing agent is an acidic color fixing agent, the specific type of the color fixing agent is a sulfonic acid condensation compound, the dosage of the color fixing agent is 2.0g/L, and the dosage of the glacial acetic acid is 1 g/L; the dispersant is Niccasunsoltcs daily chemical dispersant, and the dosage of the dispersant is 0.3 g/L; and in the color fixing process, the color fixing temperature is controlled at 75 ℃, and the color fixing time is 20 min.

Step four: and (4) washing the chinlon fabric subjected to color fixation in the step three by using clean water and drying, wherein the washing is carried out at 65 ℃ firstly and then at 35 ℃.

After washing, the fabric can be subjected to after-finishing processes such as shaping and the like, then subjected to QC goods inspection, and finally rolled, packaged and warehoused.

Second embodiment

The embodiment provides a dyeing process for preventing color spots of a warp-knitted fabric interwoven by nylon and polyester, which takes the fabric containing the nylon as a fabric to be dyed and comprises the following steps:

the method comprises the following steps: pretreating the fabric;

step two: dyeing the fabric treated in the step one;

step three: and (3) fixing the color of the fabric treated in the step (II), wherein the auxiliary agent of the color fixing process comprises the following steps: a color fixing agent, glacial acetic acid and a dispersant;

step four: and (5) washing the nylon fabric subjected to color fixation in the step three by using clean water and drying.

Example 1

The embodiment is a dyeing process for preventing color spots of nylon and cotton blended fabric, which comprises the following steps:

the method comprises the following steps: pretreating the fabric; soaking a fabric containing viscose fibers and nylon fibers in a pretreatment solution, performing pretreatment for 30-50min at the temperature of 95-100 ℃, and then performing acid washing;

step two: dyeing the fabric treated in the first step, firstly preparing a dye solution, placing the fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise 25 percent (owf) of acid dye, 2.5 percent (owf) of reactive dye, 1.0g/L of acid leveling agent, 3g/L of anhydrous sodium sulphate and 1.5g/L of glacial acetic acid, uniformly heating the fabric to 75 ℃ and preserving heat for 50min, then uniformly heating to 90-95 ℃ and preserving heat for 20-40min, and uniformly cooling to 60-70 ℃ after finishing, and discharging liquid; the temperature rising speed of the dye liquor is 1-1.5 ℃/min, and the temperature reducing speed of the dye liquor is 1.5-2.5 ℃/min; in order to keep the pH value of the dye liquor stable, sodium acetate can be added into the dye liquor to stably control the pH value of the dye at 5.5-6.5.

Step three: and (3) soaping the fabric treated in the step (II) and then fixing color, wherein the soaping process is soaping at the temperature of 50-70 ℃ for 20-30min, and the color fixing process comprises the following steps: the auxiliary agent comprises: the dye fixing agent comprises a color fixing agent, glacial acetic acid and a dispersing agent, wherein the color fixing agent is an acidic color fixing agent, the specific type of the color fixing agent is a sulfonic acid condensation compound, the dosage of the color fixing agent is 3g/L, and the dosage of the glacial acetic acid is 1.5 g/L; the dispersant is NiccasunsylLTCS dispersant, and the dosage of the dispersant is 0.5 g/L; and in the color fixing process, the color fixing temperature is controlled at 70 ℃, and the color fixing time is 30 min.

Step four: and (4) washing the fabric subjected to color fixing in the third step by using clean water and drying, wherein the fabric is washed by using 50-70 ℃ water firstly and then by using 20-40 ℃.

After washing, the fabric can be subjected to after-finishing processes such as shaping and the like, then subjected to QC goods inspection, and finally rolled, packaged and warehoused.

Example 2

The embodiment is a dyeing process for preventing color spots of nylon and polyester interwoven fabric, which comprises the following steps:

the method comprises the following steps: pretreating the fabric; pretreating at 90-100 ℃ for 20-60 min, and then carrying out acid washing;

step two: dyeing the fabric treated in the first step, firstly preparing a dye solution, placing the fabric pretreated in the first step into the dye solution, wherein auxiliaries in the dye solution comprise 1.0g/L of an acidic leveling agent, 1.25g/L of glacial acetic acid and 3% (owf) of an acidic dye, and 2% (owf) of a disperse dye, heating the fabric to 125 ℃ at a constant speed, preserving heat for 50min, and cooling to 60-70 ℃ at a constant speed after finishing, and discharging liquid; the temperature rising speed of the dye liquor is 1-1.5 ℃/min, and the temperature reducing speed of the dye liquor is 1.5-2.5 ℃/min; in order to keep the pH value of the dye liquor stable, sodium acetate can be added into the dye liquor, and the pH value of the dye liquor is stably controlled to be 4.5-5.5.

Step three: and (3) fixing the color of the fabric treated in the step (II), wherein the color fixing process comprises the following steps: the auxiliary agent comprises: the dye-fixing agent comprises a color fixing agent, glacial acetic acid and a dispersing agent, wherein the color fixing agent is an acidic color fixing agent, the specific type of the color fixing agent is a sulfonic acid condensation compound, the dosage of the color fixing agent is 3g/L, and the dosage of the glacial acetic acid is 1.5 g/L; the dispersant is NiccasunsylLTCS dispersant, and the dosage of the dispersant is 0.5 g/L; and in the color fixing process, the color fixing temperature is controlled at 70 ℃, and the color fixing time is 30 min.

Step four: and (4) washing the fabric subjected to color fixing in the third step by using clean water and drying, wherein the fabric is washed by using 50-70 ℃ water firstly and then by using 20-40 ℃.

After washing, the fabric can be subjected to after-finishing processes such as shaping and the like, then subjected to QC goods inspection, and finally rolled, packaged and warehoused.

The fabric of the embodiment adopts a national standard test method, and the dyeing result of the fabric is as follows:

from the dyeing results, the fabric dyeing fastness meets or exceeds the technical requirements under the dyeing process, and the fabric dyeing process has good dyeing quality and no solid spots.

The process is applied to dyeing of solid stain prevention of pure nylon fabrics, nylon blended yarn fabrics or nylon yarn interwoven fabrics, wherein the nylon blended yarn or nylon yarn interwoven fabrics comprise but are not limited to fabrics blended or interwoven with terylene, cotton, viscose, wool and the like.

It should be noted that the basic principles and essential features of the invention and the advantages thereof have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.