CN115710830A - One-bath two-step treatment method for pre-treatment and dyeing of polyester-cotton fabric - Google Patents
One-bath two-step treatment method for pre-treatment and dyeing of polyester-cotton fabric Download PDFInfo
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- CN115710830A CN115710830A CN202211447797.0A CN202211447797A CN115710830A CN 115710830 A CN115710830 A CN 115710830A CN 202211447797 A CN202211447797 A CN 202211447797A CN 115710830 A CN115710830 A CN 115710830A
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- 238000002203 pretreatment Methods 0.000 title claims abstract description 17
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 69
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 64
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- 239000003795 chemical substances by application Substances 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 238000010438 heat treatment Methods 0.000 claims description 28
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- 235000011121 sodium hydroxide Nutrition 0.000 claims description 23
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- MHXFWEJMQVIWDH-UHFFFAOYSA-N 1-amino-4-hydroxy-2-phenoxyanthracene-9,10-dione Chemical compound C1=C(O)C=2C(=O)C3=CC=CC=C3C(=O)C=2C(N)=C1OC1=CC=CC=C1 MHXFWEJMQVIWDH-UHFFFAOYSA-N 0.000 description 1
- VGKYEIFFSOPYEW-UHFFFAOYSA-N 2-methyl-4-[(4-phenyldiazenylphenyl)diazenyl]phenol Chemical compound Cc1cc(ccc1O)N=Nc1ccc(cc1)N=Nc1ccccc1 VGKYEIFFSOPYEW-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention belongs to the field of textile fabric dyeing and finishing, and particularly discloses a one-bath two-step treatment method for pre-treatment and dyeing and washing of polyester-cotton fabric. The invention improves the multi-bath multi-step process of pretreatment, dyeing and washing and reduction cleaning in the traditional process into a bath two-step process, greatly shortens the process flow and the treatment time, reduces the liquid discharge times, the sewage discharge amount and the energy consumption, and has the effects of reducing cost, improving efficiency, saving energy and reducing emission.
Description
Technical Field
The invention belongs to the field of textile fabric dyeing and finishing, and particularly relates to a one-bath two-step treatment method for polyester-cotton fabric pretreatment and dyeing-polyester.
Background
The cotton and the polyester fibers are textile fabrics which are used most, and have the advantages and the disadvantages respectively, and the cotton is hydrophilic, soft and comfortable to wear, but has poor fastness, easy ageing and low wear resistance; the terylene has good strength, high fastness, difficult ageing, no hydrophily, no sweat absorption and easy static.
In order to make the advantages and disadvantages of the two fibers complementary, the two fibers are mainly treated by a polyester-cotton blended fabric at present, but the dyeing process of the polyester-cotton blended fabric is very complicated, the traditional process flow generally comprises the steps of pretreatment, neutralization, washing, dyeing and washing, reduction cleaning, washing, dyeing, soaping, over-soft fixation and the like, and the whole process is long in time, large in energy consumption, large in sewage discharge and high in production cost.
In order to solve the problems, further research needs to be carried out in the field to obtain a brand-new treatment process for the polyester-cotton blended fabric, so that the treatment time of the process is shortened, the energy consumption is saved, and the sewage discharge amount is reduced.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a one-bath and two-step treatment method for pre-treatment and dyeing and washing of polyester-cotton fabric, which improves the multi-bath and multi-step process of pre-treatment, dyeing and washing and reduction cleaning in the traditional process into a one-bath and two-step process by designing the treatment mode, greatly shortens the process flow and the treatment time, reduces the liquid discharge times, the sewage discharge amount and the energy consumption, and has the effects of reducing cost, improving the effect, saving energy and reducing emission.
In order to achieve the purpose, the invention provides a one-bath two-step treatment method for pre-treatment and dyeing and washing of polyester-cotton fabric, which comprises the steps of firstly boiling off part of cotton in the dyeing and washing process, then further boiling off the cotton under the condition of no liquid drainage after the dyeing and washing are finished, and simultaneously washing the washing part in the further boiling off process, thereby realizing the pre-treatment and dyeing and washing of the polyester-cotton fabric in a one-bath two-step mode.
As a further preference, the method comprises the steps of:
s1, allowing polyester-cotton fabric to be treated to enter a dye vat for high-temperature dyeing and washing treatment, and boiling cotton by using the temperature condition of the dyeing and washing treatment;
and S2, cooling after the dyeing and washing are finished, further scouring the cotton part under the condition that the dye vat does not discharge liquid, and simultaneously cleaning the dye of the washing part, so that the pretreatment of the polyester-cotton fabric and the one-bath two-step treatment of the dyeing and washing are realized.
As a further preference, said S1 comprises the following sub-steps:
s11, introducing water into a dye vat, adding a leveling agent and a refining agent into the dye vat after the polyester-cotton fabric to be treated enters the dye vat, adding acetic acid to adjust the pH value to 4.0-5.0, and then adding a disperse dye;
s12, carrying out stepped temperature rise on the dyeing vat to realize high-temperature dyeing and washing treatment: heating to 80 ℃ at a first heating speed, then reducing the heating speed to a second heating speed and continuing to heat to 100 ℃, then reducing the heating speed to a third heating speed and continuing to heat to 130-135 ℃, keeping the temperature for 40-50 minutes, thereby realizing high-temperature dyeing and washing treatment, and simultaneously realizing scouring of cotton parts by using high-temperature conditions.
As a further preference, in step S11, the amount of the leveling agent: the dosage of the refining agent: volume of water (0.25 g-1 g): (0.5 g-1 g): 1L of the compound.
More preferably, the first temperature raising rate is 5 ℃/min or more, the second temperature raising rate is 2 ℃/min to 3 ℃/min, and the third temperature raising rate is 1 ℃/min or less.
As a further preference, said S2 comprises the following sub-steps:
s21, after dyeing and washing, carrying out stepped cooling on the dye vat: reducing the temperature to 100 ℃ at a first cooling speed, and reducing the temperature to 80-90 ℃ at a second cooling speed;
s22, keeping the dye vat at 80-90 ℃, adding caustic soda and a low-temperature scouring agent under the condition that the dye vat does not discharge liquid, adding hydrogen peroxide after a certain time, keeping for 40-50 minutes, realizing further scouring of the cotton part, and simultaneously realizing cleaning of the polyester part.
More preferably, the first cooling rate is 1 ℃/min to 2 ℃/min, and the second cooling rate is 2.5 ℃/min to 3.5 ℃/min.
As further preferred, the amount of caustic soda used is: the dosage of the low-temperature scouring agent is as follows: the dosage of hydrogen peroxide: the volume of water introduced into the dye vat is (2 g-4 g): (1 g-2 g): (3 g-8 g): 1L of the total amount of the active ingredients.
As a further preference, the temperature of the dye vat is reduced to 90 ℃ after the completion of the dyeing and washing and is maintained at this temperature; the dosage of caustic soda is as follows: the dosage of the low-temperature scouring agent is as follows: the dosage of hydrogen peroxide: the volume of water introduced into the dye vat was 2g:1g:4g:1L; adding hydrogen peroxide and keeping for 40 minutes.
Further preferably, the following steps are included after step S2:
and S3, dyeing the cotton part after neutralizing and deoxidizing the dyeing vat.
As a further preference, said S3 comprises the following sub-steps:
s31, emptying the dye vat, adding water and acetic acid into the dye vat for neutralization treatment, and then emptying the dye vat;
and S32, adding water into the dye vat, adding deoxyenzyme to remove residual hydrogen peroxide, emptying the dye vat again, and then carrying out dyeing treatment on a cotton part.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the one-bath two-step treatment method for pre-treatment and dyeing and washing of the polyester-cotton fabric, provided by the invention, realizes partial scouring of cotton in the dyeing and washing process, further scouring of the cotton under the condition of no liquid discharge after the dyeing and washing are finished, and washing of the washing part is realized at the same time, so that the multi-bath multi-step process of pre-treatment, dyeing and washing and reduction washing in the traditional process is improved into a one-bath two-step process, the process flow and the treatment time are greatly shortened, the liquid discharge times and the sewage discharge amount are reduced, the energy consumption is reduced, and the effects of cost reduction, efficiency improvement, energy conservation and emission reduction are achieved.
2. The invention adopts a step-type heating mode to realize the increase of the high-temperature dyeing and washing treatment temperature, so that the proper dyeing and washing temperature can be quickly reached by adopting an optimal heating mode, and the dyeing uniformity is ensured; and the temperature is reduced by adopting a stepped cooling mode after the dyeing and the washing are finished so as to ensure the dyeing uniformity of the disperse dye and ensure that the cotton part has enough whiteness and capillary effect on the premise of not influencing the color light of the washing.
3. According to the invention, through the design of various process parameters, namely the design of the addition amount of each raw material, the design of the treatment temperature and the treatment time of each step, and the design of the heating and cooling process, the one-bath two-step thought of the invention is matched, so that the treatment process and the treatment time of the polyester-cotton fabric can be shortened, the whiteness and the capillary effect of a cotton part and the color light of a polyester part can be effectively ensured, the cotton part can obtain the whiteness and the capillary effect which are the same as those of the traditional process under the new process condition, and the influence on the color light of the polyester part is small.
Drawings
FIG. 1 is a flow chart of a two-step treatment method of pre-treatment and dyeing-washing of polyester-cotton fabric;
FIG. 2 is a flow chart of a manufacturing process of example 1 of the present invention;
FIG. 3 is a flow chart of a manufacturing process of comparative example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
For polyester-cotton fabric, the traditional process is that the scouring pretreatment (high-temperature scouring and bleaching) is firstly carried out on the cotton part, then washing, neutralization and deoxidation are carried out, then high-temperature dyeing and washing are carried out, reduction washing is carried out after dyeing and washing, the fastness of the washing part is improved, then neutralization washing is carried out, and then the steps of dyeing, soaping, color fixation and the like are carried out on the cotton part. The treatment process has the advantages of long integral process time, high energy consumption, high sewage discharge and high production cost. Especially, the treatment steps of high-temperature scouring and bleaching, neutralization and deoxidation, high-temperature dyeing and washing, reduction and cleaning and the like in the early-stage treatment of the polyester-cotton fabric need to be completed through multiple baths, so that the treatment time of the process is greatly prolonged, and the sewage discharge and energy consumption are increased.
Based on the background, the invention provides a two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric, which comprises the steps of firstly, boiling off the cotton part in the dyeing process of the polyester part of the polyester-cotton fabric; then the cotton part is further boiled without draining after the dyeing of the polyester part is finished, and the cleaning of the polyester part is simultaneously realized in the process of further boiling. As the liquid discharge treatment is not carried out in the whole treatment process, the one-bath two-step treatment of the pretreatment (boiling) and the dyeing and washing of the polyester-cotton fabric can be realized. The method provided by the invention improves the multi-bath multi-step process of pretreatment, dyeing and washing and reduction cleaning in the traditional process of the polyester-cotton fabric into a one-bath two-step process, greatly shortens the process treatment time, reduces the liquid discharge times, and further reduces the sewage discharge and the energy consumption.
The method mainly comprises two steps of high-temperature dyeing and washing and low-temperature scouring and bleaching (scouring), wherein the two steps are carried out under the condition that liquid drainage is not needed in a dye vat, namely, one bath is completed, the pre-scouring of a cotton part can be realized in the high-temperature dyeing and washing process, the subsequent low-temperature scouring and bleaching time is reduced, and the scouring effect of the cotton part is enhanced. In addition, the residual fuel in the dyeing process of the washing part can be cleaned in the low-temperature scouring and bleaching process, so that the subsequent reduction cleaning step is omitted, and the process of multiple baths and multiple steps required by pretreatment, dyeing and washing and reduction cleaning of the traditional process can be realized by one bath through two simple steps. Greatly shortens the treatment time, reduces the sewage discharge and reduces the cost.
As shown in figure 1, the two-step treatment method of the polyester-cotton fabric pretreatment and dyeing-washing comprises the following steps:
s1, allowing polyester-cotton fabric to be treated to enter a dye vat for high-temperature dyeing and washing treatment, and simultaneously boiling cotton by using the temperature of the dyeing and washing treatment; the scouring of the dyeing of the polyester part is not needed, and the dyeing and washing are carried out under the high-temperature condition, so that the condition can be used as the treatment condition of the dyeing and washing, and the scouring of the cotton part can be realized by fully utilizing the condition, and the scouring of the cotton part can be carried out by utilizing the high temperature and the time of the dyeing and washing in the high-temperature dyeing and washing treatment process;
s2, cooling the dye vat, further scouring the cotton part under the condition that the dye vat does not discharge liquid, and simultaneously cleaning the polyester part dye, so as to realize one-bath two-step treatment of pretreatment and dyeing and washing of the polyester-cotton fabric; in the cotton scouring process, the raw materials for realizing cotton scouring can effectively clean the dyes of the polyester part, so that the reduction cleaning step after dyeing and washing can be omitted.
Specifically, S1 includes the following substeps:
s11, introducing water into a dye vat, then introducing the polyester-cotton fabric to be treated into the dye vat, adding a leveling agent and a refining agent into the dye vat, simultaneously adding acetic acid to adjust the pH value to 4.0-5.0, preferably 4.5, and then adding a disperse dye, wherein the dye uptake rate is high in the pH range;
s12, carrying out stepped heating on the dyeing vat to realize high-temperature dyeing and washing treatment: heating to 80 ℃ at a first heating speed, then reducing the heating speed to a second heating speed, continuing to heat to 100 ℃, then reducing the heating speed to a third heating speed, continuing to heat to 130-135 ℃, keeping the temperature for 40-50 minutes, thereby realizing high-temperature dyeing and washing treatment, and simultaneously realizing scouring of cotton parts by using heat.
Further, in step S12, the first temperature-raising rate is 5 ℃/min or more, the second temperature-raising rate is 2 ℃/min to 3 ℃/min, and the third temperature-raising rate is 1 ℃/min or less. The uniformity of dyeing of the disperse dye is ensured by adopting the gradually reduced temperature rise speed. The temperature rise rate has obvious influence on the uniformity of dyeing and washing, and long-term research shows that when the temperature is below 80 ℃, the molecular structure of the polyester fiber is not opened, the dye is difficult to enter the fiber, when the temperature is between 80 and 100 ℃, the fiber structure of the polyester fiber starts to be gradually opened but is not completely opened, the speed of the dye entering the fiber is slow, and when the temperature is higher than 100 ℃, the fiber structure is basically opened, and the dye dyeing speed is high. Based on the discovery, the invention carries out targeted design on the temperature rising process of the dyeing and washing, and when the temperature is lower than 80 ℃, because the dye is difficult to enter the fiber, the temperature rising speed is as fast as possible at the temperature, so as to save the temperature rising time, and the temperature rising speed is set to be more than 5 ℃/min; at the temperature of 80-100 ℃, the dye can enter the fiber, but the speed of the dye entering the fiber is slower, the heating rate is properly reduced, and the heating rate is set to be 2-3 ℃/min; when the temperature is higher than 100 ℃, the dye-uptake speed is relatively high, and the temperature rise rate is continuously reduced at the moment, so that the problem of uneven dyeing caused by the excessively fast dye-uptake is prevented, and the temperature is set to be lower than 1 ℃/min. Finally, the temperature is raised to 130-135 ℃ and the temperature is preserved for 40-50 minutes to ensure that enough dye is dyed on the fiber, on one hand, the dye is fully utilized, and on the other hand, the color stability is ensured.
More specifically, in step S11, the leveling agent, the refining agent, and the disperse dye may be products commonly used in the market, and the present invention is not limited thereto, and any existing product capable of realizing dyeing, refining, and dyeing is suitable for the present invention. In the embodiment of the invention, a chemical product TF-212K of an infectious chemical company is adopted as the leveling agent, a chemical product TF-1291A of the infectious chemical company is adopted as the scouring agent, and a conventional product sold in the market is adopted as the disperse dye. Preferably, in step S11, the amount of the leveling agent is 0.25g to 1g/L, and the amount of the scouring agent is 0.5g to 1g/L, that is, 1L of water is introduced into the dye vat in step S11, 0.25g to 1g of the leveling agent and 0.5g to 1g of the refining agent, that is, the amount of the leveling agent, are added: the dosage of the refining agent: volume of water (water passed into the dye vat in step S11) = (0.25 g-1 g): (0.5 g-1 g): 1L of the compound. The leveling agent with the addition amount can effectively promote the dye to be uniformly dyed on the fiber, and uneven dyeing is prevented. The refining agent with the dosage can fully utilize the high temperature in the dyeing and washing process to refine the cotton part so as to ensure the capillary effect of the cotton part. The addition amount of the acetic acid is determined according to the requirement, and the pH value of the dyeing and washing raw material is controlled to be between 4 and 5. The amount of the disperse dye is set according to the actual color requirement, and the invention is not limited. Through the matching of the parameters, the polyester-cotton fabric can be effectively ensured to have sufficient level-dyeing property, dye yield and scouring effect.
Specifically, S2 includes the following substeps:
s21, after dyeing and washing, carrying out stepped cooling on the dye vat: reducing the temperature to 100 ℃ at a first temperature reduction speed, reducing the temperature to 80-90 ℃ at a second temperature reduction speed, reducing the temperature in a stepped temperature reduction mode to ensure the dyeing uniformity of disperse dyes, and simultaneously reducing the temperature to 80-90 ℃ to ensure that the cotton part has enough whiteness and capillary effect on the premise of not influencing the color light of polyester;
s22, keeping the temperature of the dye vat at 80-90 ℃, adding caustic soda and a low-temperature scouring agent under the condition that the dye vat does not discharge liquor, adding hydrogen peroxide after a certain time (preferably 5 min), and keeping for 40-50 min to realize further scouring of the cotton part, wherein the caustic soda and the hydrogen peroxide can effectively clean the dye of the polyester part, and the sufficient whiteness and capillary effect of the cotton part can be ensured under the process.
More specifically, the first cooling rate in S21 is 1 ℃/min to 2 ℃/min, preferably 1 ℃/min, and the first cooling rate is 2.5 ℃/min to 3.5 ℃/min, preferably 3 ℃/min. The uniformity of dyeing of the disperse dye can be ensured by adopting the gradually increased cooling rate.
Specifically, the low-temperature scouring agent may be a product commonly used in the market, and the present invention is not particularly limited. In the examples of the present invention, TF-179B, a chemical product of a chemical company, is used. Preferably, the addition amount of the low-temperature scouring agent is 1g-2g/L; the caustic soda is NaOH solution with the mass percentage concentration of 50 percent, and the addition amount is 2g-4g/L; hydrogen peroxide is H with the mass percentage concentration of 50 percent 2 O 2 The addition amount of the solution is 3g-8g/L. Namely, in the step S11, 1L of water is introduced into the dye vat, and 1g to 2g of low-temperature scouring agent, 2g to 4g of caustic soda and 3g to 8g of hydrogen peroxide are required to be added. Namely, the amount of caustic soda used: is low inDosage of Wen Jinglian agent: the dosage of hydrogen peroxide: the volume of the water introduced into the dye vat (the water introduced into the dye vat in step S11) is (2 g-4 g): (1 g-2 g): (3 g-8 g): 1L of the compound. At this parameter, it is further ensured that the cotton fraction has sufficient whiteness and capillary effect.
Preferably, S2 comprises the following substeps:
s21, carrying out stepped cooling on the dye vat: the temperature is reduced to 100 ℃ at the speed of 1.5 ℃/min, and then is reduced to 90 ℃ at the speed of 3 ℃/min;
s22, keeping the temperature of the dye vat at 90 ℃, adding 50% of NaOH and a low-temperature scouring agent under the condition that the dye vat does not discharge liquor, adding 50% of hydrogen peroxide after 5min, and keeping for 40 min, wherein the dosage of caustic soda is as follows: the dosage of the low-temperature scouring agent is as follows: the dosage of hydrogen peroxide: the volume of water introduced into the dye vat is 2g:1g:4g:1L of the compound. The steps and the process are the optimal scouring process, and the whiteness of the cotton can be fully ensured under the optimal scouring process, so that the whiteness of the cotton is optimal.
Further, the present invention further includes the following steps after step S2: and S3, dyeing the cotton part after neutralizing and deoxidizing the dyeing vat.
Further, S3 includes the following substeps:
s31, emptying the dye vat, adding water and acetic acid into the dye vat for neutralization treatment, and then emptying the dye vat;
s32, feeding water into the dye vat, adding deoxyenzyme into the dye vat to remove residual hydrogen peroxide, emptying the dye vat again, and then carrying out dyeing treatment on a cotton part. The dyeing of the cotton part is followed by the steps of soaping and fixing, which are the same as the conventional process and are not described herein.
Specifically, the deoxyenzyme may be a commercially available product, and the present invention is not particularly limited. In the examples of the present invention, TF-160C, a chemical product of a chemical company, is used. Preferably, the addition amount of the deoxyenzyme is 0.2g-0.5g/L, and the addition amount of the acetic acid is 0.5g-0.8g/L, namely, 1L of water is introduced into the dye vat in the step S31, and 0.5g-0.8g of acetic acid is required to be added; in step S32, 1L of water is introduced into the dye vat, and 0.2g-0.5g of deoxyenzyme is required to be added. Namely, the dosage of acetic acid: the volume of water in the dye vat (water added to the dye vat in step S31) was (0.5 g-0.8 g): 1L, dosage of the deoxyenzyme: the volume of water in the dye vat (water added to the dye vat in step S32) was (0.2 g-0.5 g): 1L of the total amount of the active ingredients. Under the parameters, residual hydrogen peroxide during cotton refining can be effectively removed, subsequent cotton dyeing is not influenced, and the problem that reactive dyes used for subsequent cotton dyeing are damaged to influence the stability of cotton dyeing due to incomplete hydrogen peroxide removal is avoided.
Compared with the traditional process, the novel process needs to pay attention to three indexes, namely the whiteness of the cotton part, the capillary effect of the cotton part and the color light of the polyester part. Specifically, the whiteness of the cotton part is ensured by the combination of the boiling temperature, the dosage of sodium hydroxide (caustic soda), the dosage of a low-temperature scouring agent, the dosage of hydrogen peroxide and the boiling time (corresponding to the step S2). According to the invention, the scouring agent is added in the process of dyeing and washing, the dyeing and washing are carried out at 130-135 ℃, the scouring effect is carried out on the cotton part, then the temperature is reduced to 80-90 ℃, and the scouring is further carried out, so that the scouring effect is further enhanced, and the wool effect of the cotton part is better than that of the traditional process. According to the invention, researches show that under the condition that the temperature is lower than 90 ℃, the polyester fiber structure is hardly opened (only a few parts are opened), the dye is locked in the fiber and cannot be discharged, and if the temperature is higher than 90 ℃, the polyester fiber has a part of amorphous region structure to be opened, part of the dye can be discharged from the fiber to influence the polyester light, so the scouring temperature (scouring temperature) after dyeing and washing cannot be higher than 90 ℃, and when the temperature is lower than 80 ℃, the whiteness and capillary effect of cotton can be influenced, and the chromatic light can not be obviously improved, so that the scouring temperature is kept between 80 ℃ and 90 ℃ in the scouring step, and the low-temperature refining agent is matched to effectively ensure the polyester chromatic light.
The following are specific examples of the present invention.
Example 1 (shown in fig. 2):
s1, high-temperature dyeing and washing: after 1000L of water is fed into a main cylinder of the dye vat and enters the polyester-cotton fabric, 250g of a leveling agent TF-212K and 1000g of a refining agent TF-1291A are added from an auxiliary cylinder, 500g of acetic acid is added to adjust the pH value to 4.5, and then 0.5 percent of owf disperse blue 2BLN is added; the dye vat is continuously operated, the temperature is raised to 80 ℃ at the speed of 5 ℃/min, then the temperature raising rate is reduced to 2 ℃/min, the temperature is continuously raised to 100 ℃, the temperature raising rate is further reduced to 1 ℃/min, the temperature is raised to 130 ℃, the dye vat is operated for 45 min at the temperature of 130 ℃, and the dyeing of the washing part is completed;
s2, low-temperature scouring and bleaching (scouring): after dyeing and washing, reducing the temperature to 100 ℃ at a cooling rate of 1.5 ℃/min, then reducing the temperature to 90 ℃ at a cooling rate of 2.5 ℃/min, adding 50 percent NaOH 2000g and 1000g of low-temperature scouring agent TF-179B under the condition of no liquid discharge, adding 8000g of 50 percent hydrogen peroxide after running for 5min, and then running for 40 min to finish scouring of the cotton part;
s3, neutralizing and deoxidizing: draining, adding 1000L of water into a dye vat, adding 500g of acetic acid for neutralization, and draining; and (3) adding 500g of deoxyenzyme TF-160C into the dye vat after 1000L of water is added into the dye vat, removing residual hydrogen peroxide and discharging liquid.
As can be seen from FIG. 2, the preparation time of the whole preparation process of this example is 255min, the neutralization, deoxidation and drainage steps are removed, and the whole treatment process only drains once.
Example 2:
s1, high-temperature dyeing and washing: after 1000L of water is fed into a main cylinder of the dye vat and enters the polyester-cotton fabric, 500g of a leveling agent TF-212K and 500g of a refining agent TF-1291A are added from an auxiliary cylinder, 800g of acetic acid is added to adjust the pH value to 4.8, and then 0.4% owf disperse yellow 3GE is added; the dye vat is continuously operated, the temperature is increased to 80 ℃ at the speed of 6 ℃/min, then the temperature increase rate is reduced to 2.5 ℃/min, the temperature is continuously increased to 100 ℃, the temperature increase rate is further reduced to 0.8 ℃/min and the temperature is increased to 132 ℃, the dye vat is operated for 43 minutes at the temperature of 132 ℃, and the dyeing of the washing part is completed;
s2, low-temperature scouring and bleaching (scouring): after dyeing and washing, reducing the temperature to 100 ℃ at a cooling rate of 1 ℃/minute, then reducing the temperature to 80 ℃ at a cooling rate of 3 ℃/minute, adding 3000g of 50% NaOH and 1500g of low-temperature scouring agent TF-179B under the condition of no liquid discharge, adding 3000g of 50% hydrogen peroxide after running for 5 minutes, and then running for 48 minutes to finish scouring of a cotton part;
s3, neutralizing and deoxidizing: draining liquor from a dye vat, adding 1000L of water, adding 800g of acetic acid for neutralization, and then draining liquor; adding 200g of deoxyenzyme TF-160C into a dye vat after 1000L of water is fed into the dye vat, removing residual hydrogen peroxide, and discharging liquor from the dye vat;
s4, cotton dyeing: dyeing of the cotton portion is carried out, the subsequent process being the same as the conventional process.
Example 3:
s1, high-temperature dyeing and washing: after 1000L of water enters a main cylinder of a dye vat and enters a polyester-cotton fabric, 1000g of a leveling agent TF-212K and 800g of a refining agent TF-1291A are added from an auxiliary cylinder, 1000g of acetic acid is added to adjust the pH value to 4.8, and then disperse red FB is added; the dye vat is continuously operated, the temperature is raised to 80 ℃ at the speed of 7 ℃/min, then the temperature raising rate is reduced to 3 ℃/min, the temperature is continuously raised to 100 ℃, the temperature raising rate is further reduced to 1 ℃/min and raised to 135 ℃, the dye vat is operated for 40 min at 135 ℃, and the dyeing of the washing part is finished;
s2, low-temperature scouring and bleaching (scouring): after dyeing and washing, reducing the temperature to 100 ℃ at a cooling rate of 2 ℃/min, then reducing the temperature to 85 ℃ at a cooling rate of 3.5 ℃/min, adding 4000g of 50% NaOH and 2000g of low-temperature scouring agent TF-179B under the condition of no liquid discharge, adding 5000g of 50% hydrogen peroxide after running for 5min, and then running for 45 min to finish scouring of a cotton part;
s3, neutralizing and deoxidizing: draining liquor from a dye vat, adding 650g of acetic acid into the dye vat after 1000L of water is added into the dye vat for neutralization, and then draining liquor; adding 300g of deoxyenzyme TF-160C after 1000L of water is added into the dye vat, removing residual hydrogen peroxide, and discharging liquor from the dye vat;
s4, cotton subsequent treatment: the dyeing, soaping and color fixing treatment of the cotton part are carried out by adopting the traditional process.
Comparative example 1:
as shown in fig. 3, the conventional process is used for polyester-cotton treatment, and in order to ensure the accuracy of comparison, the same parts in high-temperature dyeing and neutralization deoxidation as those in the invention adopt the process parameters of the embodiment 1 of the invention, which specifically include:
s1, high-temperature scouring and bleaching: introducing 1000L of water into a dye vat, adding 4000g of 50% NaOH,1000g of scouring agent TF-1291A and 500g of hydrogen peroxide stabilizer TF-122F, operating for 10 minutes, adding 3000g of 50% hydrogen peroxide, operating for 5 minutes, heating to 98 ℃ at the heating rate of 3 ℃/minute, operating for 45 minutes at 98 ℃, cooling to 80 ℃ and discharging liquid;
s2, neutralizing and deoxidizing: adding 1000L of water into a dye vat, adding 500g of acetic acid for neutralization, and discharging liquid; adding 500g of deoxyenzyme TF-160C into a dye vat after 1000L of water is added into the dye vat, removing residual hydrogen peroxide and discharging liquid;
s3, high-temperature dyeing and washing: after 1000L of water was supplied to the main tank of the dye vat and polyester-cotton fabric was supplied, 250g of the leveling agent TF-212K was added from the sub tank, 500g of acetic acid was added to adjust the pH to 4.5, and then 0.5% of disperse blue 2BLN was added; the dye vat is continuously operated, the temperature is raised to 80 ℃ at the speed of 5 ℃/min, then the temperature raising rate is reduced to 2 ℃/min, the temperature is continuously raised to 100 ℃, the temperature raising rate is further reduced to 1 ℃/min and raised to 130 ℃, the dye vat is operated for 45 min at 130 ℃, and the dyeing of the washing part is finished; after dyeing and washing, reducing the temperature to 100 ℃ at the speed of 1.5 ℃/minute, reducing the temperature to 90 ℃ at the speed of 2.5 ℃/minute, and discharging liquid;
s4, reduction cleaning: running the dye vat for 10 minutes after 1000L of water enters the dye vat, and then discharging liquid; adding 1000LL of water into the dye vat, heating to 70 ℃, adding 4000g of sodium hydrosulfite and 4000g of 50 percent NaOH, and discharging after running for 20 minutes; then 1000L of water is added into the dye vat, 800g of acetic acid is added, and drainage is carried out after 15 minutes of operation.
As can be seen from FIG. 3, the total time length of the production flow of this comparative example was 355min, and the number of times of liquid discharge was 7. The preparation time of the invention is 255min, the preparation time is shortened by more than 28%, and the drainage times are only 3 times by the neutralization and deoxidation step, compared with the comparative example, the drainage times are greatly reduced, the water consumption can be saved by more than 50%, and the sewage discharge is reduced by more than 50%. And through the application and the accounting of the actual production line, the novel process can save more than 38% of steam, save more than 32% of production cost, and save more than 740 yuan per ton of fabric. Therefore, the novel process has a good application prospect.
The invention mixes the pretreatment, dyeing and washing and reduction washing multi-bath multi-step processes in the traditional process of the polyester-cotton fabric into a one-bath two-step process, because the dyeing of the washing part does not need scouring, and the dyeing and washing are carried out under the high-temperature and high-pressure state, and the cotton part has better scouring effect at the moment, the invention creatively provides that the high temperature and the time of the dyeing and washing are fully utilized to scour the cotton part in the dyeing and washing process, and the caustic soda, the hydrogen peroxide and the low-temperature refining agent are added to scour the cotton further after the temperature is reduced without discharging the liquid after the dyeing and washing are finished, so that the cotton part obtains sufficient scouring effect. As caustic soda and hydrogen peroxide are added in the scouring process, the dye of the washing part can be effectively cleaned, so that the reduction cleaning step after the dyeing washing is omitted. The invention fully utilizes the conditions of the dyeing, washing and scouring processes through technological innovation, so that the treatment steps of the invention are realized under the conditions, and other treatment functions are realized at the same time, thereby effectively shortening the process treatment flow and time and greatly reducing the production cost and energy consumption. Compared with the traditional process, the novel process can save water by more than 50 percent, save treatment time by more than 28 percent, save steam by more than 38 percent, save cost by more than 32 percent, and save production cost by more than 740 yuan per ton of fabric.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The method is characterized in that partial scouring of cotton is realized in the dyeing and washing processes, then further scouring of the cotton is realized under the condition that liquid is not discharged after dyeing and washing are finished, and washing of the washing part is realized simultaneously in the further scouring process, so that the pretreatment and dyeing and washing of the polyester-cotton fabric are realized in a one-bath two-step mode.
2. The two-step treatment method of polyester-cotton fabric pretreatment and dyeing-washing as claimed in claim 1, which comprises the following steps:
s1, allowing polyester-cotton fabric to be treated to enter a dye vat for high-temperature dyeing and washing treatment, and simultaneously boiling cotton by using the temperature condition of the dyeing and washing treatment;
and S2, cooling after the dyeing and washing are finished, further scouring the cotton part under the condition that the dye vat does not discharge liquid, and simultaneously cleaning the dye of the washing part, so that the pretreatment of the polyester-cotton fabric and the one-bath two-step treatment of the dyeing and washing are realized.
3. The two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric as claimed in claim 2, wherein said S1 comprises the following substeps:
s11, introducing water into a dye vat, adding a leveling agent and a refining agent into the dye vat after the polyester-cotton fabric to be treated enters the dye vat, adding acetic acid to adjust the pH value to 4.0-5.0, and then adding a disperse dye;
s12, carrying out stepped heating on the dyeing vat to realize high-temperature dyeing and washing treatment: heating to 80 ℃ at a first heating speed, then reducing the heating speed to a second heating speed and continuing to heat to 100 ℃, then reducing the heating speed to a third heating speed and continuing to heat to 130-135 ℃, keeping the temperature for 40-50 minutes, thereby realizing high-temperature dyeing and washing treatment, and simultaneously realizing scouring of cotton parts by using high-temperature conditions.
4. The two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric as claimed in claim 3, wherein in step S11, the dosage of said leveling agent is: the dosage of the refining agent: volume of water (0.25 g-1 g): (0.5 g-1 g): 1L of the compound.
5. The two-step treatment method of polyester-cotton fabric pretreatment and dyeing-washing as claimed in claim 3, wherein the first temperature rise speed is above 5 ℃/min, the second temperature rise speed is 2 ℃/min to 3 ℃/min, and the third temperature rise speed is below 1 ℃/min.
6. The two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric as claimed in claim 2, wherein said S2 comprises the following substeps:
s21, after dyeing and washing, carrying out stepped cooling on the dye vat: reducing the temperature to 100 ℃ at a first cooling speed, and reducing the temperature to 80-90 ℃ at a second cooling speed;
s22, keeping the dye vat at 80-90 ℃, adding caustic soda and a low-temperature scouring agent under the condition that the dye vat does not discharge liquid, adding hydrogen peroxide after the preset time, and keeping for 40-50 minutes to realize further scouring of the cotton part and cleaning of the polyester part.
7. The two-step treatment method of the pre-treatment and the dyeing and washing of the polyester-cotton fabric as claimed in claim 6, wherein the first cooling rate is 1 ℃/min to 2 ℃/min, and the second cooling rate is 2.5 ℃/min to 3.5 ℃/min.
8. The two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric as claimed in claim 6, wherein the amount of caustic soda is as follows: the dosage of the low-temperature scouring agent is as follows: the dosage of hydrogen peroxide: the volume of water introduced into the dye vat is (2 g-4 g): (1 g-2 g): (3 g-8 g): 1L of the total amount of the active ingredients.
9. The two-step pretreatment and dyeing-washing method for polyester-cotton fabric according to claim 8, wherein the temperature of the dye vat is reduced to 90 ℃ and kept at the temperature after the dyeing and washing are finished; the dosage of caustic soda is as follows: the dosage of the low-temperature scouring agent is as follows: the dosage of hydrogen peroxide: the volume of water introduced into the dye vat is 2g:1g:4g:1L; adding hydrogen peroxide and keeping for 40 minutes.
10. The two-step treatment method of pre-treatment and dyeing and washing of polyester-cotton fabric as claimed in claim 2, wherein step S2 is followed by the following steps: s3, dyeing the cotton part after neutralizing and deoxidizing the dyeing vat; preferably, the S3 includes the following sub-steps:
s31, emptying the dye vat, adding water and acetic acid into the dye vat for neutralization treatment, and then emptying the dye vat;
and S32, adding water into the dye vat, adding deoxyenzyme to remove residual hydrogen peroxide, emptying the dye vat again, and then carrying out dyeing treatment on the cotton part.
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