阅读说明：本技术 一种高牢度的染色工艺 (Dyeing process with high fastness ) 是由 许金泰 谢贵华 周行志 朱艳丽 胡文广 于 2021-07-19 设计创作，主要内容包括：本发明涉及纺织染整技术领域,具体指一种高牢度的染色工艺。该工艺为涤纶面料的染色工艺,包括以下步骤：A、面料前处理；B、面料染色：在染缸中加水,将匀染剂、冰醋酸和染料稀释后加入染缸运行,而后按照分段升温保温的方式进行染色；C、面料还原清洗：将染色后的面料在染缸中加入氢氧化钠、保险粉、酸性固色剂进行还原清洗；D、面料脱水开幅：将还原清洗后的面料取出并进行脱水,在开幅机上进行开幅；E、面料定型：将开幅后的面料先经阳离子固色剂溶液,而后在定型机上进行定型。本发明通过合理的染色工艺参数调整,以及在定型工艺中加入阳离子固色剂,使得涤纶面料的色泣牢度得到明显提高,大大提升了面料的印染品质。(The invention relates to the technical field of textile dyeing and finishing, in particular to a dyeing process with high fastness. The process is a dyeing process of polyester fabrics, and comprises the following steps: A. preprocessing the fabric; B. dyeing the fabric: adding water into a dye vat, diluting a leveling agent, glacial acetic acid and dye, adding the diluted leveling agent, glacial acetic acid and dye into the dye vat for running, and then dyeing according to a sectional heating and heat preservation mode; C. fabric reduction and cleaning: adding sodium hydroxide, sodium hydrosulfite and an acidic color fixing agent into the dyed fabric in a dye vat for reduction cleaning; D. dewatering and scutching fabric: taking out the fabric subjected to reduction cleaning, dehydrating, and scutching on a scutching machine; E. fabric sizing: and (3) firstly, the fabric after being opened is subjected to a cationic color fixing agent solution, and then is shaped on a shaping machine. According to the invention, through reasonable dyeing process parameter adjustment and addition of the cationic color fixing agent in the sizing process, the color fastness of the polyester fabric is obviously improved, and the printing and dyeing quality of the fabric is greatly improved.)

1. A dyeing process with high fastness is characterized in that: the process is a dyeing process of polyester fabrics, and comprises the following steps:

A. pretreatment of the fabric: adding water into a dye vat, heating to 80-90 ℃ at the speed of 2 ℃/L, adding a pretreatment auxiliary agent into the water, continuously heating to 120 ℃ of 100-; the front assistant auxiliary agent comprises 0.5-1g/L of refining agent, 2-4g/L of sodium hydroxide, 2-4g/L of sodium carbonate and 1-2g/L of sodium hydrosulfite;

B. dyeing the fabric: adding water into a dye vat, diluting a leveling agent, glacial acetic acid and dye, adding into the dye vat, running for 5-10min, dyeing according to a sectional heating and heat preservation mode, and discharging liquor from the dye vat after dyeing is finished;

C. fabric reduction and cleaning: cooling the dyed fabric to 10-40 ℃, adding sodium hydroxide, sodium hydrosulfite and an acidic color fixing agent into a dye vat, and carrying out reduction cleaning at the temperature of 80-90 ℃ for 30-40 min;

D. dewatering and scutching fabric: taking out the fabric subjected to reduction cleaning, dehydrating, and scutching on a scutching machine;

E. fabric sizing: and (3) firstly, the fabric after being opened is subjected to a cationic color fixing agent solution, and then is shaped on a shaping machine.

2. High-fastness dyeing process according to claim 1, characterized in that: the dyeing process of the fabric further comprises the steps of quality inspection and packaging of the fabric, and the step is arranged after the fabric shaping process.

3. High-fastness dyeing process according to claim 1 or 2, characterized in that: in the step E, the mass fraction of the cationic color fixing agent is 2-5%, the liquid carrying rate of the fabric is 50-60% during setting, the pressure of a roller groove is 2.0-2.5Pa during setting, the upper wind power is 90-120cfm, the lower wind power is 90-120cfm, the setting speed is 20-25m/min, and the setting temperature is 160-200 ℃.

4. High-fastness dyeing process according to claim 3, characterized in that: the color fastness at the bottom of the fabric dyed by the dyeing process is not lower than 4.5 grades, and the color fastness at the top of the fabric dyed by the dyeing process is not lower than 3.5 grades.

5. High-fastness dyeing process according to claim 4, characterized in that: the dyed fabric is warp-knitted jacquard black polyester fabric, and the knitting yarn of the fabric is polyester DTY 150D/72F.

6. High-fastness dyeing process according to claim 5, characterized in that: the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.6g/L and efficient leveling agent 1.2g/L, running for 10min, adding 4g/L dye, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 105 deg.C at 1.0 deg.C/min, holding for 10min, heating to 135 deg.C at 1.5 deg.C/min, and holding for 40 min;

and C, adding 4g/L of sodium hydroxide and 4g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, draining water, washing, adding 4g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, discharging liquid, washing with water until the water is clear.

7. High-fastness dyeing process according to claim 5, characterized in that: the fabric shaping process in the fabric step E comprises the steps of firstly soaking the fabric into a solution with the mass fraction of the cationic color fixing agent being 4%, wherein the liquid carrying rate of the fabric is 50% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper air force is 100cfm, the lower air force is 100cfm, the shaping speed is 20m/min, and the shaping temperature is 185 ℃, and shaping is carried out on the fabric.

8. High-fastness dyeing process according to claim 4, characterized in that: the dyed fabric is warp-knitted double-sided blue polyester fabric, and the knitting yarn of the fabric is polyester DTY 100D/72F.

9. High-fastness dyeing process according to claim 8, characterized in that: the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.4g/L and efficient leveling agent 0.8g/L, running for 10min, adding dye 2g/L, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 100 deg.C at 1.0 deg.C/min, holding for 10min, heating to 130 deg.C at 1.5 deg.C/min, and holding for 30 min;

and C, adding 3g/L of sodium hydroxide and 3g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, then preserving heat for 30min, draining water and washing after finishing, adding 3g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, preserving heat for 30min, draining liquid and washing until water is clear.

10. High-fastness dyeing process according to claim 8, characterized in that: the fabric shaping process in the fabric step E comprises the steps of firstly soaking the fabric into a solution with the mass fraction of 2% of a cationic color fixing agent, wherein the liquid carrying rate of the fabric is 60% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper wind power is 95cfm, the lower wind power is 95cfm, the shaping vehicle speed is 23m/min, and the shaping temperature is 180 ℃, and shaping is carried out on the fabric.

Technical Field

The invention relates to the technical field of textile dyeing and finishing, in particular to a dyeing process with high fastness.

Background

With the rapid development of textile production technology, the quality requirements of textile products are higher and higher. Color fastness is directly related to the health safety of human body and the appearance quality of fabric, and is particularly concerned by people. 4 detection items in 8 detection items of national mandatory standard GB1840-2010 national textile product basic safety technical Specification relate to color fastness detection. The color fastness to water, the color fastness to perspiration and the color fastness to saliva are the same, but in recent years, the problem that the current color fastness detection items cannot be well characterized is revealed in the quality management of consumer complaints production enterprises. Particularly, the increase of export trade drives China to strengthen the research of new projects, and for example, the color fastness requirements of some products exported from Japan in 2004 are increased. The color fastness test method in Japan is also called the bolus method. However, there are many technical problems with respect to fastness to colour in the context of shoe materials. The project is an improvement research on color fastness of the current shoe materials.

The cationic color fixing agent is added into the setting machine, so that the color fastness of the polyester dyed by the disperse dye can be improved, and the traditional process is to perform reduction cleaning and wash off the loose color part of the disperse dye to improve the color fastness. However, the finished product needs to be subjected to the processes of shaping and sublimating the disperse dye, so that various fastness of the polyester material is reduced, and particularly the color fastness of the Japanese large-pill method cannot be well solved.

The color fastness was measured by sewing a long woven cotton cloth to a colored cloth, immersing the cloth in distilled water for 2 hours, allowing the distilled water to climb to a certain height, and observing the staining on the watermark, wherein the darker the staining and the worse the fastness, the lighter the staining and the better the fastness, and it was predicted that the dye moved from the dyed portion to the white and light portions in a wet state due to rain or washing, and appeared as a phenomenon of bleeding. Poor color fastness greatly degrades the quality of the fabric, and brings production troubles to printing and dyeing factories and shoe factories.

Disclosure of Invention

In order to solve the technical problems, the invention provides a dyeing process with high fastness, which is a dyeing process of a polyester fabric, and comprises the following steps:

A. pretreatment of the fabric: adding water into a dye vat, heating to 80-90 ℃ at the speed of 2 ℃/L, adding a pretreatment auxiliary agent into the water, continuously heating to 120 ℃ of 100-; the front assistant auxiliary agent comprises 0.5-1g/L of refining agent, 2-4g/L of sodium hydroxide, 2-4g/L of sodium carbonate and 1-2g/L of sodium hydrosulfite;

B. dyeing the fabric: adding water into a dye vat, diluting a leveling agent, glacial acetic acid and dye, adding into the dye vat, running for 5-10min, dyeing according to a sectional heating and heat preservation mode, and discharging liquor from the dye vat after dyeing is finished;

C. fabric reduction and cleaning: cooling the dyed fabric to 10-40 ℃, adding sodium hydroxide, sodium hydrosulfite and an acidic color fixing agent into a dye vat, and carrying out reduction cleaning at the temperature of 80-90 ℃ for 30-40 min;

D. dewatering and scutching fabric: taking out the fabric subjected to reduction cleaning, dehydrating, and scutching on a scutching machine;

E. fabric sizing: and (3) firstly, the fabric after being opened is subjected to a cationic color fixing agent solution, and then is shaped on a shaping machine.

Furthermore, the dyeing process of the fabric also comprises the steps of quality inspection and packaging of the fabric, and the step is arranged after the fabric shaping process.

Further, in the step E, the mass fraction of the cationic color fixing agent is 2-5%, the liquid carrying rate of the fabric is 50-60% during setting, the pressure of a roller groove is 2.0-2.5Pa during setting, the upper wind power is 90-120cfm, the lower wind power is 90-120cfm, the setting speed is 20-25m/min, and the setting temperature is 160-200 ℃.

Furthermore, the color fastness at the bottom of the fabric dyed by the dyeing process is not lower than 4.5 grade, and the color fastness at the top of the fabric dyed by the dyeing process is not lower than 3.5 grade.

Further, the dyed fabric is warp-knitted jacquard black polyester fabric, and the knitting yarn of the fabric is polyester DTY 150D/72F.

Further, the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.6g/L and efficient leveling agent 1.2g/L, running for 10min, adding 4g/L dye, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 105 deg.C at 1.0 deg.C/min, holding for 10min, heating to 135 deg.C at 1.5 deg.C/min, and holding for 40 min.

And C, adding 4g/L of sodium hydroxide and 4g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, draining water, washing, adding 4g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, discharging liquid, washing with water until the water is clear.

Further, the fabric shaping process in the fabric step E is that the fabric is firstly immersed into a solution with the mass fraction of the cationic color fixing agent being 4%, the liquid carrying rate of the fabric is 50% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper wind power is 100cfm, the lower wind power is 100cfm, the shaping vehicle speed is 20m/min, and the shaping temperature is 185 ℃, and the fabric is shaped.

Further, the dyed fabric is warp-knitted double-sided blue polyester fabric, and the knitting yarn of the fabric is polyester DTY 100D/72F.

Further, the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.4g/L and high-efficiency leveling agent 0.8g/L, running for 10min, adding dye 2g/L, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 100 deg.C at 1.0 deg.C/min, holding for 10min, heating to 130 deg.C at 1.5 deg.C/min, and holding for 30 min.

And C, adding 3g/L of sodium hydroxide and 3g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, then preserving heat for 30min, draining water and washing after finishing, adding 3g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, preserving heat for 30min, draining liquid and washing until water is clear.

Further, the fabric shaping process in the fabric step E is that the fabric is firstly immersed into a solution with the mass fraction of 2% of the cationic color fixing agent, the liquid carrying rate of the fabric is 60% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper wind power is 95cfm, the lower wind power is 95cfm, the shaping vehicle speed is 23m/min, and the shaping temperature is 180 ℃, and the fabric is shaped.

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

1, through reasonable dyeing process parameter adjustment and addition of the cationic color fixing agent in the sizing process, the color fastness of the polyester fabric is obviously improved, and the printing and dyeing quality of the fabric is greatly improved.

2 the cationic color fixing agent is added after dyeing the terylene, the color change is not influenced, various color fastness indexes can be improved in the blended fiber, and particularly, the color fastness is increased by 1-2 levels.

Drawings

FIG. 1 is a process flow diagram for dyeing a fabric according to an embodiment of the present invention;

FIG. 2 is a process diagram for dyeing fabric according to example 1 of the present invention;

fig. 3 is a process diagram of fabric dyeing according to embodiment 2 of the present invention.

Detailed Description

The invention will be further explained with reference to the following examples and the accompanying drawings.

The invention provides a dyeing process with high fastness, which is a dyeing process of a polyester fabric and comprises the following steps as shown in figure 1:

A. pretreatment of the fabric: adding water into a dye vat, heating to 80-90 ℃ at the speed of 2 ℃/L, adding a pretreatment auxiliary agent into the water, continuously heating to 120 ℃ of 100-; the front assistant auxiliary agent comprises 0.5-1g/L of refining agent, 2-4g/L of sodium hydroxide, 2-4g/L of sodium carbonate and 1-2g/L of sodium hydrosulfite;

B. dyeing the fabric: adding water into a dye vat, diluting a leveling agent, glacial acetic acid and dye, adding into the dye vat, running for 5-10min, dyeing according to a sectional heating and heat preservation mode, and discharging liquor from the dye vat after dyeing is finished;

C. fabric reduction and cleaning: cooling the dyed fabric to 10-40 ℃, adding sodium hydroxide, sodium hydrosulfite and an acidic color fixing agent into a dye vat, and carrying out reduction cleaning at the temperature of 80-90 ℃ for 30-40 min;

D. dewatering and scutching fabric: taking out the fabric subjected to reduction cleaning, dehydrating, and scutching on a scutching machine;

E. fabric sizing: and E, sizing the fabric after scutching by using a cationic color fixing agent solution on a sizing machine, wherein in the step E, the mass fraction of the cationic color fixing agent is 2-5%, the liquid carrying rate of the fabric during sizing is 50-60%, the pressure of a roller groove during sizing is 2.0-2.5Pa, the upward wind power is 90-120cfm, the downward wind power is 90-120cfm, the sizing vehicle speed is 20-25m/min, and the sizing temperature is 160-200 ℃.

The color fastness at the bottom of the fabric dyed by the dyeing process is not lower than 4.5 grades, and the color fastness at the top of the fabric dyed by the dyeing process is not lower than 3.5 grades.

In the invention, the adopted color fastness test method comprises the following steps:

[ 1 ] JIS L0803 stain test white cloth (No. 3 gold towel), beaker (50m1/100m1/200ml, etc.), and nonionic surfactant 5 sample preparation and treatment.

The specification of the sample is 30-25 mm, the side with color is tested, if two sides have different colors, the two sides are tested, and the quantity is determined according to the color.

(iii) white cloth gauge 250 × 25mm, the number being 1 more than the number of samples, this block being used to measure siphon height.

And fourthly, sewing the colored side of the sample with the white cloth according to a right pattern.

Preparation of 0.05% aqueous solution of nonionic surfactant at least 100ml of 200m1, 500m1 or 1L of the solution was prepared according to the amount tested

A. The solution proportion is that each 100ml of solution contains 0.05g of nonionic surfactant, and the nonionic surfactant is added according to the proportion.

B. When preparing the solution, air bubbles, if any, are removed by a blower or a suction bulb.

C. The prepared solution can be stored for 1 week, and must be stirred before each use.

Test step

A. In a 50ml beaker equal to the number of samples, 50ml of solution were added:

B. in another 2 beakers of 50m, one also added 50ml of solution and the other 50m ] of distilled water. (weighing A1)

C. At normal temperature. The bottom end 15m of the combined sample is soaked in the solution, and the extra white cloth is soaked in 1u of the solution and is placed for 2 hours.

D. After two hours, the beaker was removed in situ and the sample was left hanging in situ and allowed to dry.

E. The weight of the beaker containing 50ml of distilled water was immediately weighed (A2).

F. The white cloth was immediately tested for siphon height.

Expression of result

A. The evaporation rate was A1-A2, and the result was required to be 0.15-0.3 g.

B. The siphon height was measured from the bottom, requiring 15.5 cm. + -. 3 cm.

C. Rank of 2 positions with gray card: from bottom to 2cm down from the top and 2cm down from the top, the two ranges, i.e. bottom and top fastness, respectively.

Example 1

This example shows a warp-knitted jacquard black polyester fabric, the knitting yarn of which is polyester DTY 150D/72F.

As shown in fig. 2, the fabric pretreatment process in step a of the fabric comprises the following steps: adding water into a dye vat, heating to 85 ℃ at the speed of 2 ℃/L, adding a pretreatment auxiliary agent into the water, continuously heating to 105 ℃, treating for 10min, and then discharging liquid; the front assistant auxiliary agent comprises 1g/L of refining agent, 3g/L of sodium hydroxide, 3g/L of sodium carbonate and 1g/L of sodium hydrosulfite;

the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.6g/L, high-efficiency leveling agent 1.2g/L, running for 10min, adding dye 4g/L, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 105 deg.C at 1.0 deg.C/min, holding for 10min, heating to 135 deg.C at 1.5 deg.C/min, holding for 40min, and discharging;

and C, adding 4g/L of sodium hydroxide and 4g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, draining water, washing, adding 4g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, keeping the temperature for 30min, discharging liquid, washing with water until the water is clear.

The fabric shaping process in the fabric step E comprises the steps of firstly soaking the fabric into a solution with the mass fraction of the cationic color fixing agent being 4%, wherein the liquid carrying rate of the fabric is 50% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper air force is 100cfm, the lower air force is 100cfm, the shaping speed is 20m/min, and the shaping temperature is 185 ℃, and shaping is carried out on the fabric.

The detection results of the fabric of this embodiment are as follows:

test items	Technical requirements	Test results
			Alkali for color fastness to perspiration	≥3.0	3.5
Color shifting paste six-fiber	≥4.0	4.0
			Bottom of color qi	≥4.0	4.5
Color top	≥3.0	3.5

The test result shows that all the color fastness of the fabric is greater than or equal to the technical requirement value, and the fabric meets the technical requirement.

Example 2

This embodiment provides a dyeing process for warp-knitted double-sided blue polyester fabric, the knitting yarn of the fabric is polyester DTY100D/72F, and compared with embodiment 1, the fabric has a lower gram weight and a lighter color depth.

As shown in fig. 3, the fabric pretreatment process in step a of the fabric comprises the following steps: adding water into a dye vat, heating to 80 ℃ at the speed of 2 ℃/L, adding a pretreatment auxiliary agent into the water, continuously heating to 100 ℃, treating for 10min, and then discharging liquid; the front assistant auxiliary agent comprises 0.8g/L of refining agent, 2g/L of sodium hydroxide, 2g/L of sodium carbonate and 1g/L of sodium hydrosulfite;

the dyeing process of the fabric in the step B comprises the following steps: adding auxiliary agent glacial acetic acid 0.4g/L and high-efficiency leveling agent 0.8g/L, running for 10min, adding dye 2g/L, running for 10min, heating to 90 deg.C at 3 deg.C/min, heating to 100 deg.C at 1.0 deg.C/min, holding for 10min, heating to 130 deg.C at 1.5 deg.C/min, and holding for 30 min.

And C, adding 3g/L of sodium hydroxide and 3g/L of sodium hydrosulfite, heating to 80 ℃ at a speed of 4 ℃/min, then preserving heat for 30min, draining water and washing after finishing, adding 3g/L of an acidic color fixing agent, heating to 70 ℃ at a speed of 4 ℃/min, preserving heat for 30min, draining liquid and washing until water is clear.

The fabric shaping process in the fabric step E comprises the steps of firstly soaking the fabric into a solution with the mass fraction of 2% of a cationic color fixing agent, wherein the liquid carrying rate of the fabric is 60% during shaping, the pressure of a roller groove is 2.0Pa during shaping, the upper wind power is 95cfm, the lower wind power is 95cfm, the shaping vehicle speed is 23m/min, and the shaping temperature is 180 ℃, and shaping is carried out on the fabric.

The detection results of the fabric of this embodiment are as follows:

the test result shows that all the color fastness of the fabric is greater than or equal to the technical requirement value, and the fabric meets the technical requirement.

After the fabric in the embodiment is shaped, QC quality inspection is often required before the fabric leaves a factory, and the fabric is rolled and packaged.

In the invention, the pretreatment process can be added with relaxation processing according to requirements, which is arranged before the dyeing process of the step B, and the assistant for the relaxation processing comprises: 30% of sodium hydroxide 5%, 0.6% of sodium phosphate and 0.1% of degreaser; the processing is carried out on a continuous open width washing machine, and the technological parameters are as follows: padding the auxiliary agent, steaming at 80-95 ℃, treating for 50-60S, washing with hot water and cold water, wherein the hot water temperature is 60-85 ℃, and the cold water temperature is 20-40 ℃.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of 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. Any reference sign in a claim should not be construed as limiting the claim concerned.

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.