阅读说明：本技术 一种纯棉筒纱高反应活性染料染色方法 (High-reactivity dye dyeing method for pure cotton cone yarn ) 是由 李秀兰 张在成 贾李锋 陈晓 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种纯棉筒纱高反应活性染料染色方法：(a)化料缸加入清水,升温到38～42℃,加入染料搅拌20～30min；(b)预备缸内加清水,加入柠檬酸搅拌均匀；(c)将染色工作液抽入主缸,38～42℃循环4～8min；(d)把染料抽入主缸,匀速加料,循环10～15min；(e)将主缸内的料液回水,升温到38～42℃加入元明粉,溶解后匀速加入主缸；(f)主缸内的筒纱与染色液慢慢升温到55～65℃,然后保温循环15～25min；(g)固色剂纯碱分两次加入(h)加完固色剂后,55～65℃保温循环25～65min,排液；(i)后处理。本发明用于筒纱染色,能获得极高的匀染性、颜色重现性和极低的返修率。(The invention discloses a method for dyeing pure cotton cone yarn by using high-reactivity dye, which comprises the following steps: (a) adding clear water into the material melting cylinder, heating to 38-42 ℃, adding a dye, and stirring for 20-30 min; (b) adding clear water into the preparation cylinder, adding citric acid, and stirring uniformly; (c) pumping the dyeing working solution into a main cylinder, and circulating for 4-8 min at 38-42 ℃; (d) pumping the dye into a main cylinder, feeding at a constant speed, and circulating for 10-15 min; (e) returning feed liquid in the main cylinder, heating to 38-42 ℃, adding anhydrous sodium sulphate, dissolving, and then adding into the main cylinder at a constant speed; (f) slowly heating the cone yarn and the dyeing solution in the main cylinder to 55-65 ℃, and then carrying out heat preservation circulation for 15-25 min; (g) adding the color fixing agent sodium carbonate twice (h), then, performing heat preservation circulation at the temperature of 55-65 ℃ for 25-65 min, and discharging liquid; (i) and (5) post-treatment. The invention is used for dyeing the cone yarn, and can obtain extremely high level-dyeing property, color reproducibility and extremely low repair rate.)

1. A method for dyeing pure cotton cone yarn by using high-reactivity dye is characterized by comprising the following steps:

(a) dye dissolution: adding clear water into a material dissolving tank of a cylinder dyeing machine, heating to 38-42 ℃, slowly adding the dye according to the set dye concentration, simultaneously turning on stirring, and stirring for 20-30 min;

(b) preparing a dyeing working solution: adding clear water into a preparation cylinder of a cylinder dyeing machine, heating to 38-42 ℃, adding citric acid to adjust the pH value to 6-7, and uniformly stirring;

(c) feeding a dyeing working solution: starting a main pump, pumping the prepared dyeing working solution into a main cylinder, and circulating for 4-8 min at 38-42 ℃;

(d) dye feeding: pumping the dissolved dye into a main cylinder, feeding at a constant speed with a feeding curve of 0%, wherein the feeding time is 25-35 min, and circulating for 10-15 min;

(e) charging anhydrous sodium sulphate: returning the feed liquid in the main cylinder, heating to 38-42 ℃, adding anhydrous sodium sulphate, simultaneously opening stirring, and stirring for 2-5 min; adding the dissolved anhydrous sodium sulphate into a main cylinder, wherein the feeding curve is 0%, feeding at a constant speed, the feeding time is 25-35 min, and circulating for 10-15 min;

(f) dyeing: the bath ratio of the cheese and the dyeing liquid in the main cylinder is 1: 6-8, the temperature is slowly increased to 55-65 ℃ according to the temperature increase rate of 0.8-1.2 ℃/min, and then the heat preservation circulation is carried out for 15-25 min;

(g) feeding a color fixing agent: adding the color fixing agent sodium carbonate twice, returning water from a main cylinder to a material dissolving cylinder in the first feeding, adding the sodium carbonate, stirring and dissolving for 2-5 min, slowly adding the dissolved sodium carbonate into the main cylinder, wherein the feeding time is 15-25 min, the feeding curve is 68-72%, adding the sodium carbonate solution, and circulating for 3-8 min; adding clean water into the material melting cylinder for the second feeding, heating to 50-60 ℃, adding soda ash, stirring for 4-8 min, slowly adding the dissolved soda ash into the main cylinder, wherein the feeding time is 25-35 min, and the feeding curve is 68-72%;

(h) and (3) fixation: after the color fixing agent is added twice, the temperature is kept at 55-65 ℃ for 25-65 min in a circulating mode, and then liquid is discharged;

(i) and (3) post-treatment: the cone yarn after color fixation is sequentially subjected to post-treatment steps of washing, neutralization, soap boiling and softening;

in the above steps, step (a) and step (b) may be performed simultaneously, alternately or sequentially; the order of step (d) and step (e) may be interchanged.

2. The method for dyeing pure cotton cone yarn with high reactive dye according to claim 1, characterized in that: when the concentration of the dye is low concentration of owf percent less than or equal to 0.5 percent, the sequence of the step (d) and the step (e) is carried out in sequence; when the concentration of the dye is high as owf% is more than 0.5%, the steps (d) and (e) are performed in the order of (e) and (d).

3. The method for dyeing pure cotton cone yarn with high reactive dye according to claim 1, characterized in that: in the dye feeding step, the speed of a circulating pump of a main pump is 80-90%, wherein forward rotation is carried out for 4-6 min, and reverse rotation is carried out for 6-10 min.

4. The method for dyeing pure cotton cone yarn with high reactive dye according to claim 1, characterized in that: in the color fixing agent feeding step, the adding amount of the first sodium carbonate is 0.3-0.8 g/l; the addition amount of the secondary sodium carbonate is 4.5-19.5 g/l.

Technical Field

The invention relates to the technical field of textile printing and dyeing, in particular to a high-reactivity dye dyeing technology for pure cotton cone yarns.

Background

The pure cotton cone yarn is usually dyed by common reactive dyes, the common reactive dyes generally consist of chromophore and single active group or double active groups, the reaction is slow, and the dye uptake is about 60%. In order to solve the problem of slow dye-uptake, novel AVITERA Red SE reactive dyes are used at present, the reactive dyes are composed of chromophores and three active groups, the reaction is fast during dyeing, and the dye-uptake is high and is generally about 90%. However, because the reaction speed is too fast, the problem of color and pattern of the cone yarn is easy to appear when the conventional active dyeing process curve is used for feeding and dyeing, and the quality problem of color difference of the inner layer and the middle layer is caused when the problem is serious. And the quality of the cone yarn is influenced by dark color dyeing or the coagulation quality problem of cone yarn dye.

In view of the current situation, the improvement of the conventional cone yarn dyeing method is urgently needed to adapt to the popularization and application of the novel reactive dye and improve the quality of the dyed cone yarn.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the method for dyeing the pure cotton cone yarn by using the high-reactivity dye can obtain extremely high level-dyeing property, color reproducibility and extremely low repair rate.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a method for dyeing pure cotton cone yarn by using high-reactivity dye comprises the following steps:

(a) dye dissolution: adding clear water into a material dissolving tank of a cylinder dyeing machine, heating to 38-42 ℃, slowly adding the dye according to the set dye concentration, simultaneously opening stirring, covering a material dissolving tank cover with the added dye, and stirring for 20-30 min;

(b) preparing a dyeing working solution: adding clear water into a preparation cylinder of a cylinder dyeing machine, heating to 38-42 ℃, adding citric acid to adjust the pH value to 6-7, and uniformly stirring;

(c) feeding a dyeing working solution: starting a main pump, pumping the prepared dyeing working solution into a main cylinder, and circulating for 4-8 min at 38-42 ℃;

(d) dye feeding: pumping the dissolved dye into a main cylinder, feeding at a constant speed with a feeding curve of 0%, wherein the feeding time is 25-35 min, and circulating for 10-15 min;

(e) charging anhydrous sodium sulphate: returning the feed liquid in the main cylinder, wherein the amount of the returned water is 10% of the volume of the main cylinder, heating to 38-42 ℃, adding anhydrous sodium sulphate, simultaneously opening stirring, covering a material melting cylinder cover with the added anhydrous sodium sulphate, and stirring for 2-5 min; adding the dissolved anhydrous sodium sulphate into a main cylinder, wherein the feeding curve is 0%, feeding at a constant speed, the feeding time is 25-35 min, and circulating for 10-15 min;

(f) dyeing: the bath ratio of the cheese and the dyeing liquid in the main cylinder is 1: 6-8, the temperature is slowly increased to 55-65 ℃ according to the temperature increase rate of 0.8-1.2 ℃/min, and then the heat preservation circulation is carried out for 15-25 min;

(g) feeding a color fixing agent: adding the color fixing agent sodium carbonate twice, returning water from a main cylinder to a material dissolving cylinder in the first feeding, wherein the amount of the returned water is 10% of the volume of the main cylinder, adding the sodium carbonate, stirring and dissolving for 2-5 min, slowly adding the dissolved sodium carbonate into the main cylinder, wherein the feeding time is 15-25 min, the feeding curve is 68-72%, adding the sodium carbonate solution completely, and circulating for 3-8 min; adding clean water into the material melting cylinder for the second feeding, wherein the water adding amount is 10% of the volume of the main cylinder, heating to 50-60 ℃, adding soda ash, stirring for 4-8 min, slowly adding the dissolved soda ash into the main cylinder, wherein the feeding time is 25-35 min, and the feeding curve is 68-72%;

(h) and (3) fixation: after the color fixing agent is added twice, the temperature is kept at 55-65 ℃ for 25-65 min in a circulating mode, and then liquid is discharged;

(i) and (3) post-treatment: the cone yarn after color fixation is sequentially subjected to post-treatment steps of washing, neutralization, soap boiling and softening;

in the above steps, step (a) and step (b) may be performed simultaneously, alternately or sequentially; the order of step (d) and step (e) may be interchanged.

As an improved technical scheme, when the concentration of the dye is low concentration of owf percent less than or equal to 0.5 percent, the sequence of the step (d) and the step (e) is carried out in sequence; when the concentration of the dye is high as owf% is more than 0.5%, the steps (d) and (e) are performed in the order of (e) and (d).

As an improved technical scheme, in the step of feeding the dye, the speed of a circulating pump of a main pump is 80-90%, wherein forward rotation is carried out for 4-6 min, and reverse rotation is carried out for 6-10 min. If the power of the main pump is 50KW, the output power, i.e. the speed of the circulating pump, is 40-45 KW.

As an improved technical scheme, in the color fixing agent feeding step, the adding amount of the first sodium carbonate is 0.3-0.8 g/l; the addition amount of the secondary sodium carbonate is 4.5-19.5 g/l.

As a preferable technical scheme, when the concentration of the dye is low concentration which is less than or equal to 0.5% owf%, the adding amount of the first sodium carbonate is 0.3-0.8 g/l; the adding amount of the secondary sodium carbonate is 4.5-10 g/l; when the concentration of the dye is high with owf percent more than 0.5 percent, the adding amount of the first sodium carbonate is 0.3-0.8 g/l; the addition amount of the secondary sodium carbonate is 8-19.5 g/l.

As an improved technical scheme, when the concentration of the dye is low concentration with owf percent less than or equal to 0.5 percent, the heat preservation cycle time in the color fixing step is 25-35 min; when the concentration of the dye is high, namely owf% is more than 0.5%, the heat preservation cycle time in the color fixing step is 35-65 min.

As a preferable technical scheme, the feeding amount of the anhydrous sodium sulphate is 25-65 g/l. When the concentration of the dye is low concentration of owf percent less than or equal to 0.5 percent, the feeding amount of the anhydrous sodium sulphate is 25-35 g/l; when the concentration of the dye is high, wherein the concentration of the dye is owf percent and is more than 0.5 percent, the feeding amount of the anhydrous sodium sulphate is 35-65 g/l.

The charging amount of the sodium carbonate and the anhydrous sodium sulphate is the content of the sodium carbonate and the anhydrous sodium sulphate in the dye solution of the main cylinder after being added into the main cylinder.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

according to the dyeing method of the high-reactivity pure cotton cone yarn dye, when the dyeing working solution is prepared, citric acid is added to adjust the pH value to be 6-7, so that the pH value of water is effectively reduced, the dye is effectively uniformly dyed on fibers before alkali is added, and the quality problem of color difference of the inner layer and the outer layer of the cone yarn during dyeing of the high-reactivity reactive dye is solved; the color fixing agent is added twice, and the clear water is used for adding alkali for the second time, so that the aggregation of the hydrolyzed dye caused by the fact that the high-reactivity reactive dye is hydrolyzed too fast under the high-alkali condition that the main cylinder returns water can be effectively avoided, and particularly for deep colors, the problem of the aggregation of the hydrolyzed dye on the surface layer of the cone yarn caused by the fact that the backwater is added with alkali is effectively solved. The cone yarn dyeing method provided by the invention can be used for processing dyed cone yarns to obtain extremely high level-dyeing property, color reproducibility and extremely low repair rate.

The invention solves the problems of poor quality of colored layers and dyeing coagulation of the cone yarn during dyeing by using the high-activity dye, the quality of the cone yarn completely meets the specified requirements of first-class products or superior products, and the quality of the yarn is improved.

Detailed Description

The invention is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1

Color: light gray, dye formula:

AVITERA Red SE：0.0905％

AVITERA Gold Yellow SE：0.133％

AVITERA Blue SE：0.22％

using high-temperature high-pressure cylinder dyeing machines

(a) Dye dissolution: adding clear water into a material dissolving tank of a cylinder dyeing machine, adding water at a water level of 10% of the volume of a main tank, heating to 40 ℃, slowly adding dye according to a set dye concentration, simultaneously opening stirring, covering a material dissolving tank cover with the added dye, and stirring for 25 min;

(b) preparing a dyeing working solution: adding clear water into a preparation cylinder of a cylinder dyeing machine while dissolving the dye, adding water according to 10% of the volume of a main cylinder, heating to 40 ℃, adding citric acid to adjust the pH value to 6.5, and uniformly stirring;

(c) feeding a dyeing working solution: starting a main pump, pumping the prepared dyeing working solution into a main cylinder, and circulating for 5min at 40 ℃;

(d) dye feeding: pumping the dissolved dye into a main cylinder, feeding at a constant speed with a feeding curve of 0%, feeding for 30min, and circulating for 10 min; the speed of a circulating pump of the main pump is 85%, wherein the main pump rotates forwards for 4min and rotates backwards for 6 min;

(e) charging anhydrous sodium sulphate: returning feed liquid in the main cylinder, wherein the return water amount is 10% of the volume of the main cylinder, heating to 40 ℃, and adding anhydrous sodium sulphate, wherein the feeding amount of the anhydrous sodium sulphate is 30 g/l; simultaneously, opening stirring, adding anhydrous sodium sulphate, covering a material melting cylinder cover, and stirring for 3 min; adding the dissolved anhydrous sodium sulphate into a main cylinder, wherein the feeding curve is 0%, feeding at a constant speed, the feeding time is 30min, and the circulation time is 10 min;

(f) dyeing: the bath ratio of the cheese and the dyeing liquid in the main cylinder is 1:7, the temperature is slowly raised to 60 ℃ according to the temperature rise rate of 1 ℃/minute, and then the heat preservation circulation is carried out for 20 min;

(g) feeding a color fixing agent: the color fixing agent sodium carbonate is added in two times, and the adding amount of the first sodium carbonate is 0.5 g/l; returning water from a main cylinder to a material melting cylinder for the first feeding, wherein the amount of the returned water is 10% of the volume of the main cylinder, adding the dissolved sodium carbonate into the main cylinder slowly after stirring and melting the materials for 3min, wherein the feeding time is 20min, the feeding speed curve is 70% by adopting a gradually accelerated feeding mode, the sodium carbonate solution is added, and the circulation is carried out for 5 min; the addition amount of the secondary sodium carbonate is 9.5 g/l; adding clear water into a material melting cylinder, wherein the water adding amount is 10% of the volume of a main cylinder, heating to 55 ℃, adding soda ash, stirring for 5min, slowly adding the dissolved soda ash into the main cylinder, wherein the material adding time is 30min, and the material adding speed curve is 70% by adopting a gradual acceleration material adding mode;

(h) and (3) fixation: after the color fixing agent is added twice, the temperature is kept at 60 ℃ for 30min, and then the liquor is discharged;

(i) and (3) post-treatment: and the cone yarn after color fixation is sequentially subjected to the post-treatment steps of washing at 60 ℃ for 10min, neutralizing at 60 ℃ for 10min, soaping at 75 ℃ for 10min, washing at 50 ℃ for 8min and softening.

Example 2

Color: bright red, formula:

AVITERA Cardinal SE：2.03％,

AVITERA Red SE：0.0905％

using high-temperature high-pressure cylinder dyeing machines

(a) Dye dissolution: adding clear water into a material dissolving tank of a cylinder dyeing machine, adding water at a water level of 10% of the volume of a main tank, heating to 41 ℃, slowly adding dye according to a set dye concentration, simultaneously opening stirring, covering a material dissolving tank cover with the added dye, and stirring for 28 min;

(b) preparing a dyeing working solution: adding clear water into a preparation cylinder of a cylinder dyeing machine while dissolving the dye, adding water according to 10% of the volume of a main cylinder, heating to 41 ℃, adding citric acid to adjust the pH value to 6.6, and uniformly stirring;

(c) feeding a dyeing working solution: starting a main pump, pumping the prepared dyeing working solution into a main cylinder, and circulating for 4min at 41 ℃; the speed of a circulating pump of the main pump is 86 percent, wherein the main pump rotates forwards for 5min and rotates backwards for 7 min;

(d) charging anhydrous sodium sulphate: returning feed liquid in the main cylinder, wherein the return water amount is 10% of the volume of the main cylinder, heating to 41 ℃, and adding anhydrous sodium sulphate, wherein the feeding amount of the anhydrous sodium sulphate is 55 g/l; simultaneously, opening stirring, adding anhydrous sodium sulphate, covering a material melting cylinder cover, and stirring for 4 min; adding the dissolved anhydrous sodium sulphate into a main cylinder, wherein the feeding curve is 0%, feeding at a constant speed, the feeding time is 28min, and circulating for 12 min;

(e) dye feeding: pumping the dissolved dye into a main cylinder, feeding at a constant speed for 32min according to a feeding curve of 0%, and circulating for 12 min;

(f) dyeing: the bath ratio of the cheese and the dyeing liquid in the main cylinder is 1:7, the temperature is slowly raised to 62 ℃ according to the temperature rise rate of 1 ℃/minute, and then the heat preservation circulation is carried out for 18 min;

(g) feeding a color fixing agent: the color fixing agent sodium carbonate is added in two times, and the adding amount of the first sodium carbonate is 0.6 g/l; returning water from the main cylinder to the material melting cylinder for the first feeding, wherein the amount of the returned water is 10% of the volume of the main cylinder, adding the dissolved sodium carbonate into the main cylinder slowly after 2.5min of stirring and melting the materials, feeding for 20min, adopting a gradually accelerated feeding mode, feeding a sodium carbonate solution at a feeding rate curve of 70%, and circulating for 6 min; the amount of soda added in the second time is 19 g/l. Adding clean water into the material melting cylinder for the second feeding, wherein the water adding amount is 10% of the volume of the main cylinder, heating to 56 ℃, adding the sodium carbonate, stirring for 6min, slowly adding the dissolved sodium carbonate into the main cylinder, wherein the feeding time is 32min, and the feeding speed curve is 70% by adopting a gradually accelerated feeding mode;

(h) and (3) fixation: after the color fixing agent is added twice, the temperature is kept at 62 ℃ for 50min, and then the liquor is discharged;

(i) and (3) post-treatment: and (3) washing the fixed cheese by 70 ℃ for 10min, washing by 70 ℃ for 10min, neutralizing by 70 ℃ for 10min, soaping by 85 ℃ for 10min, washing by 70 ℃ for 10min, washing by 50 ℃ for 8min and softening in sequence.

Comparative example 1

The difference between comparative example 1 and example 1 is: in the step of preparing the dyeing working solution, citric acid is not added for value adjustment; the method specifically comprises the following steps: adding clear water into a preparation cylinder of the cylinder dyeing machine, adding water in a water level of 10% of the volume of a main cylinder, and heating to 40 ℃. The rest steps are the same.

Comparative example 2

The difference between comparative example 2 and example 2 is: in the step of preparing the dyeing working solution, citric acid is not added for value adjustment; the method specifically comprises the following steps: clean water is added into a preparation cylinder of the cylinder dyeing machine, the water level is added according to 10 percent of the volume of a main cylinder, and the temperature is raised to 41 ℃. The rest steps are the same.

Comparative example 3

The difference between comparative example 3 and example 2 is: in the step of charging the color fixing agent, the second alkali addition still uses backwater, which specifically comprises the following steps: the color fixing agent sodium carbonate is added in two times, and the adding amount of the first sodium carbonate is 0.6 g/l; returning water from the main cylinder to the material melting cylinder for the first feeding, wherein the amount of the returned water is 10% of the volume of the main cylinder, adding the dissolved sodium carbonate into the main cylinder slowly after stirring the materials for melting for 2.5min, wherein the feeding time is 20min, the feeding curve is 70%, the sodium carbonate solution is added, and the circulation is carried out for 6 min; the amount of soda added in the second time is 19 g/l. Returning water from the main cylinder to the material melting cylinder for the second feeding, wherein the amount of the returned water is 10% of the volume of the main cylinder, heating to 56 ℃, adding the dissolved sodium carbonate into the main cylinder slowly after stirring for 6min, wherein the feeding time is 32min, and the feeding curve is 70%. The rest steps are the same.

The dyed yarns of the example 1, the example 2, the comparative example 1, the comparative example 2 and the comparative example 3 are subjected to dyeing grade evaluation under a light source of D65, and the results are shown in the following table 1.

TABLE 1

Item	Color evaluation light source	Difference in layer	Cylinder difference	Dyeing quality of cheese
					Example 1	D65 light source	4-5 stages	4-5 stages	Superior product
Example 2	D65 light source	4-5 stages	4-5 stages	Superior product
					Comparative example 1	D65 light source	3	3-4	Fail to be qualified
Comparative example 2	D65 light source	3	3-4	Fail to be qualified
					Comparative example 3	D65 light source	3	3-4	Fail to be qualified

Therefore, the bobbin yarn dyeing method provided by the invention has a good dyeing effect, the dyed bobbin yarn reaches the high-grade product standard, and the bobbin yarn is not added with citric acid for value adjustment or is added with alkali for the second time to use the bobbin yarn after backwater in the step of preparing the dyeing working solution, so that the dyeing quality of the bobbin yarn is greatly reduced.