CN108589329B - Dacron fabric disperse dyeing reduction-free cleaning process - Google Patents
Dacron fabric disperse dyeing reduction-free cleaning process Download PDFInfo
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- CN108589329B CN108589329B CN201810293924.3A CN201810293924A CN108589329B CN 108589329 B CN108589329 B CN 108589329B CN 201810293924 A CN201810293924 A CN 201810293924A CN 108589329 B CN108589329 B CN 108589329B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/16—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/653—Nitrogen-free carboxylic acids or their salts
- D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/34—Material containing ester groups
- D06P3/52—Polyesters
- D06P3/54—Polyesters using dispersed dyestuffs
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
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Abstract
The invention relates to the field of dyeing and finishing processing of textiles, in particular to a polyester fabric disperse dyeing reduction-free cleaning process. According to the polyester fabric disperse dyeing reduction-free cleaning process provided by the invention, the dyeing polyester fabric is not required to be reduced and cleaned by using a reducing agent, so that the loose color and the color spots on the surface of the fabric can be effectively removed, the dyed fabric obtains stable color light and excellent color fastness to washing, the process is simpler and more environment-friendly, the enterprise cost is reduced, and the enterprise benefit is improved.
Description
Technical Field
The invention relates to the field of textile dyeing and finishing processing, in particular to a polyester fabric disperse dyeing reduction-free cleaning process.
Background
The polyester fabric is usually dyed by using disperse dye under the condition of pH 5-6 at high temperature and high pressure. After dyeing is finished, besides the dye attached to the surface of the fabric causes flooding, the oligomer contained in the terylene can be dissolved out in the high-temperature and high-pressure dyeing process, and can be deposited on the surface of the fabric to form color spots in the cooling process, so that the quality of the dyed terylene fabric is influenced. The reduction cleaning of dyed polyester fabrics by using a reducing agent such as sodium hydrosulfite and the like is the most common and effective method for removing floating and color spots on the surfaces of the fabrics at present. However, the reducing agent removes the stain on the basis of destroying the dye, and the removal of the stain has the defect of destroying the dye.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a polyester fabric disperse dyeing reduction-free cleaning process, which adopts alkaline treatment on a polyester fabric dyed by high-alkali-resistance disperse dye, wherein the alkaline treatment can remove the surface flooding of the fabric on one hand, and can hydrolyze oligomers deposited on the surface of the fabric on the other hand, thereby achieving the reduction-free cleaning effect on the basis of not damaging the dye.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a polyester fabric disperse dyeing reduction-free cleaning process comprises the steps of firstly dyeing a polyester fabric by using a high-alkali-resistant disperse dye, then treating the dyed polyester fabric by using an alkaline solution, and then soaping and washing.
Compared with the conventional disperse dye, the high alkali-resistant disperse dye can keep excellent color light stability in a wider pH range under the condition. Surprisingly, the soaping treatment is carried out after the alkali treatment is carried out on the polyester fabric dyed by the high-alkali-resistant disperse dye, so that on one hand, the loose color on the surface of the fabric can be removed, on the other hand, the oligomer deposited on the surface of the fabric can be hydrolyzed, the dyeing on the fabric is not damaged, and the effect of reducing-free cleaning is achieved.
According to the polyester fabric disperse dyeing reduction-free cleaning process provided by the invention, the dyeing polyester fabric is not required to be reduced and cleaned by using a reducing agent, so that the loose color and the color spots on the surface of the fabric can be effectively removed, the dyed fabric obtains stable color light and excellent color fastness to washing, the enterprise cost can be reduced, and the enterprise benefit can be improved.
Further, the highly alkali-resistant disperse dye maintains excellent color light stability under high temperature and high pressure conditions and at a pH range of 4 to 14.
Further, the high alkali-resistant disperse dye is an HA type alkali-resistant disperse dye.
Further, the dosage of the high alkali-resistant disperse dye is 0.1-10% of the weight of the polyester fabric, and preferably 1-5% of the weight of the polyester fabric, so as to achieve a better dyeing effect.
As in the different embodiments, the amount of the high alkali-resistant disperse dye is 0.1%, 0.5%, 1%, 2%, 3%, 5%, 7%, 8%, 9%, 10% and so on of the weight of the polyester fabric according to the shade of the color required.
Further, the high-alkali-resistance disperse dye is used for dyeing the polyester fabric at high temperature and high pressure in a dye liquor mode.
Further, the dye solution also contains a leveling agent.
Furthermore, the concentration of the leveling agent in the dye solution is 0.5-3 g/L. The concentration of the leveling agent is generally selected based on the amount of dye used, and in various embodiments, the concentration of the leveling agent can be 0.5g/L, 1g/L, 1.5g/L, 02g/L, 2.5g/L, 3g/L, and the like.
Further, the weight ratio of the dye liquor to the polyester fabric is 3-30: 1. In order to achieve better dyeing effect, the weight ratio of the dye liquor to the polyester fabric is preferably 10-30: 1. As in the different embodiments, the weight ratio of the dye liquor to the polyester fabric may be 3:1, 5:1, 6:1, 7:1, 8:1, 10:1, 12:1, 13:1, 15:1, 17:1, 18:1, 20:1, 25:1, 28:1, 30:1, and so on.
Further, the leveling agent is an anionic surfactant or a nonionic surfactant or a compound surfactant.
The high-temperature high-pressure dyeing in the present invention means a pressure formed under a certain temperature condition in a dyeing apparatus.
Further, the high-temperature high-pressure dyeing process comprises the following steps:
heating at a heating rate of 0.5-4 deg.C/min to 70-100 deg.C for 5-20 min, and heating to 105-135 deg.C for 30-60 min.
As in the different embodiments, the ramp rate can be 0.5 ℃/minute, 1 ℃/minute, 1.5 ℃/minute, 2 ℃/minute, 2.5 ℃/minute, 3 ℃/minute, 4 ℃/minute, and the like; further, heating to 70-100 deg.C, and maintaining for 5-20 min, such as 70 deg.C for 20min, 80 deg.C for 15min, 85 deg.C for 10min, 90 deg.C for 10min, 100 deg.C for 5min, etc.; further heating to 105-.
Further, after the high-temperature high-pressure dyeing is finished, the temperature is reduced to be below 80 ℃ at the cooling rate of 0.5-4 ℃/min, and residual liquid is discharged.
As in the different embodiments, after the high temperature and high pressure dyeing is finished, the temperature can be reduced to below 80 ℃ at the cooling rate of 0.5 ℃/minute, 1 ℃/minute, 1.5 ℃/minute, 2 ℃/minute, 2.5 ℃/minute, 3 ℃/minute, 4 ℃/minute, and the like.
Further, the polyester fabric comprises polyester woven, knitted pure-spun or blended fabric.
The alkaline agent used in the alkaline solution is generally strong base, such as caustic soda, potassium hydroxide, etc., and preferably, the alkaline agent used in the alkaline solution is caustic soda. The caustic soda is adopted, so that the cost is low, and the sewage generated by the caustic soda is easy to treat.
Further, the concentration of the alkaline solution is 0.5-20 g/L. As in various embodiments, the concentration of the basic solution can be 0.5g/L, 1g/L, 1.5g/L, 2g/L, 3g/L, 5g/L, 8g/L, 10g/L, 13g/L, 15g/L, 18g/L, 20g/L, and so forth.
In the present invention, the alkaline solution simultaneously performs the effects of reducing the amount of alkali and removing floating color and color spots, and in order to achieve a better effect, the concentration of the alkaline solution is preferably 2 to 10 g/L.
Further, the weight ratio of the alkaline solution to the polyester fabric is 3-30:1, preferably 10-25:1, and more preferably 10-20: 1.
As in the different embodiments, the weight ratio of the alkaline solution to the polyester fabric may be 3:1, 5:1, 8:1, 10:1, 12:1, 15:1, 18:1, 20:1, 22:1, 25:1, 28:1, 30:1, and so on.
Further, the process of treating the dyed polyester fabric by the alkaline solution comprises the following steps: keeping the temperature for 30-60 minutes from 80-130 ℃ at the heating rate of 0.5-4 ℃/minute; then the temperature is reduced to below 80 ℃ at the cooling rate of 0.5-4 ℃/min, and the dye liquor is discharged.
As in the different embodiments, the ramp rate can be 0.5 ℃/minute, 1 ℃/minute, 1.5 ℃/minute, 2 ℃/minute, 2.5 ℃/minute, 3 ℃/minute, 4 ℃/minute, and the like; heating to 80-130 deg.C, and maintaining for 30-60 min, such as 80 deg.C for 60min, 90 deg.C for 50 min, 100 deg.C for 35 min, and 130 deg.C for 30 min; further, the cooling rate can be 0.5 deg.C/minute, 1 deg.C/minute, 1.5 deg.C/minute, 2 deg.C/minute, 2.5 deg.C/minute, 3 deg.C/minute, 4 deg.C/minute, and the like.
In the invention, the soaping mainly has the function of removing floating color.
Further, the agent used for soaping is a soaping agent.
Further, the soaping is carried out by adopting a soaping solution, and the concentration of the soaping agent in the soaping solution is 0.5-3 g/L. The concentration of soaping agent may be 0.5g/L, 1g/L, 1.5g/L, 2g/L, 3g/L, etc., as in various embodiments.
Further, the weight ratio of the soap washing liquor to the polyester fabric is 10-30: 1. As in various embodiments, the weight ratio of the soaping liquid to the polyester fabric may be 10:1, 12:1, 15:1, 18:1, 20:1, 22:1, 25:1, 27:1, 30:1, and so on.
Further, the soaping process comprises the following steps:
soaping for 10-30 minutes at the temperature rising rate of 0.5-4 ℃/minute to 80-100 ℃, adjusting the pH of the solution to 7 +/-0.5, continuously treating for 10-30 minutes, and discharging residual liquid.
After soaping by the procedure, the loose color on the surface of the fabric is effectively removed, so that the dyed fabric obtains stable color light and excellent color fastness to washing.
Further, the adjustment of the pH of the solution to 7. + -. 0.5 is carried out using an acidic substance.
Further, the acidic substance is a weakly acidic substance.
Further, the weakly acidic substance is acetic acid.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the polyester fabric disperse dyeing reduction-free cleaning process provided by the invention, by adjusting the sequence of dyeing and alkali treatment, the reduction cleaning step can be omitted, namely, the fabric can have stable color light and excellent color fastness to washing without using a reducing agent for cleaning.
(2) The polyester fabric disperse dyeing reduction-free cleaning process provided by the invention omits a reduction cleaning step, so that the consumption of chemicals is saved, the cost of a printing and dyeing enterprise is reduced, the benefit of the printing and dyeing enterprise is improved, the water pollution caused by the step is saved, and the process is more environment-friendly.
(3) Compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the method provided by the invention has darker color and equivalent color fastness to washing, and the consumption of dye can be saved.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Disperse bright red HA-G dyed polyester knitted fabric
The invention provides a polyester fabric disperse dyeing reduction-free cleaning process, which comprises the following steps:
(1) dyeing the polyester knitted fabric at high temperature and high pressure: the dye dosage is 2% of the weight of the fabric, and the leveling agent is 1g/L (NICAC SUNSOLT 7000Z, Rihua chemical Co., Ltd.); preparing a dye solution according to the weight ratio of the dye solution to the fabric of 10:1, heating to 100 ℃ on a high-temperature high-pressure dyeing machine at a speed of 1 ℃/min, and preserving heat for 10 min; heating to 130 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 30 min; and after dyeing is finished, cooling to below 80 ℃ at a cooling rate of 4 ℃/min, and discharging dye liquor.
(2) Alkali washing of the dyed polyester knitted fabric: injecting 2.5g/L of caustic soda solution into the dye vat, wherein the weight ratio of the caustic soda solution to the fabric is 10:1, heating to 80 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 60 min; after the alkaline cleaning is finished, the temperature is reduced to below 80 ℃ at the cooling rate of 4 ℃/min, and residual liquid is discharged.
(3) Soaping and washing the dyed polyester fabric: injecting soaping liquid into the dye vat, wherein the soaping liquid contains 1g/L soaping agent, and the weight ratio of the soaping liquid to the polyester fabric is 20:1, heating to 100 ℃ at a heating rate of 1 ℃/min, soaping for 10min, neutralizing pH to 7 +/-0.5 with glacial acetic acid, continuously treating for 10min at 100 ℃, and discharging residual liquid; washing with clear water.
The conventional process is as follows:
(1) alkali treatment: washing with water to neutrality in the same step (2);
(2) dyeing, which is the same as the step (1);
(3) reduction and cleaning: injecting reduction cleaning fluid into the dye vat, wherein the reduction cleaning fluid contains 3g/L sodium hydrosulfite, 2g/L sodium hydroxide and 2g/L penetrant JFC (Texas German chemical engineering), raising the temperature to 90 ℃ at the temperature raising speed of 2 ℃/min, and carrying out reduction cleaning for 20 min;
(4) soaping and water washing, the same as the step (3).
The color characteristics and the fastness to washing of the polyester fabric dyed with disperse bright red HA-G are shown in tables 1 and 2.
TABLE 1 color characteristics of disperse bright red HA-G dyed polyester knit fabrics
TABLE 2 color fastness to washing of disperse bright red HA-G dyed polyester knitted fabric
As can be seen from the table, compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the dyeing method provided by the invention has darker color and equivalent color fastness to washing, but a reduction cleaning solution is not used, so that the process is simpler, the reagent is saved, the pollution caused by the reagent is prevented, and the process is more environment-friendly.
Example 2
Disperse bright red HA-G dyed polyester knitted fabric
The invention provides a polyester fabric disperse dyeing reduction-free cleaning process, which comprises the following steps:
(1) dyeing the polyester knitted fabric at high temperature and high pressure: the dye dosage is 0.1% of the weight of the fabric, and the leveling agent is 0.5g/L (NICAC SUNSOLT 7000Z, Rihua chemical Co., Ltd.); preparing a dye solution according to the weight ratio of the dye solution to the fabric of 30:1, heating to 70 ℃ on a high-temperature high-pressure dyeing machine at the speed of 0.5 ℃/min, and preserving heat for 20 min; then the temperature is raised to 105 ℃ at the heating rate of 0.5 ℃/min, and the temperature is kept for 60 min; and after dyeing is finished, cooling to below 80 ℃ at a cooling rate of 4 ℃/min, and discharging dye liquor.
(2) Alkali washing of the dyed polyester knitted fabric: injecting 0.5g/L of caustic soda solution into the dye vat, wherein the weight ratio of the caustic soda solution to the fabric is 30:1, heating to 80 ℃ at the heating rate of 0.5 ℃/min, and keeping the temperature for 60 min; after the alkaline cleaning is finished, the temperature is reduced to be below 80 ℃ at the cooling rate of 0.5 ℃/min, and residual liquid is discharged.
(3) Soaping and washing the dyed polyester fabric: injecting soaping liquid into the dye vat, wherein the soaping liquid contains 0.5g/L soaping agent, and the weight ratio of the soaping liquid to the polyester fabric is 30:1, heating to 80 ℃ at a heating rate of 0.5 ℃/min, soaping for 30min, neutralizing pH to 7 +/-0.5 with glacial acetic acid, continuously treating for 30min at 80 ℃, and discharging residual liquid; washing with clear water.
The conventional process is as follows:
(1) alkali treatment: washing with water to neutrality in the same step (2);
(2) dyeing, which is the same as the step (1);
(3) reduction and cleaning: injecting reduction cleaning fluid into the dye vat, wherein the reduction cleaning fluid contains 3g/L sodium hydrosulfite, 2g/L sodium hydroxide and 2g/L penetrant JFC (Texas German chemical engineering), raising the temperature to 90 ℃ at the temperature raising speed of 2 ℃/min, and carrying out reduction cleaning for 20 min;
(4) soaping and water washing, the same as the step (3).
The result shows that compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the dyeing method provided by the invention has darker color and equivalent color fastness to washing, but a reduction cleaning solution is not used, the process is simpler, the reagent is saved, the pollution caused by the reagent is prevented, and the process is more environment-friendly.
Example 3
Disperse bright red HA-G dyed polyester knitted fabric
The invention provides a polyester fabric disperse dyeing reduction-free cleaning process, which comprises the following steps:
(1) dyeing the polyester knitted fabric at high temperature and high pressure: the dye dosage is 10% of the fabric weight, and the leveling agent is 3g/L (NICAC SUNSOLT 7000Z, Rihua chemical Co., Ltd.); preparing a dye solution according to the weight ratio of the dye solution to the fabric of 3:1, heating to 100 ℃ on a high-temperature high-pressure dyeing machine at a speed of 4 ℃/min, and preserving heat for 5 min; heating to 135 deg.C at a rate of 4 deg.C/min, and maintaining for 30 min; and after dyeing is finished, cooling to below 80 ℃ at a cooling rate of 4 ℃/min, and discharging dye liquor.
(2) Alkali washing of the dyed polyester knitted fabric: injecting 20g/L of caustic soda solution into the dye vat, wherein the weight ratio of the caustic soda solution to the fabric is 3:1, heating to 130 ℃ at the heating rate of 4 ℃/min, and keeping the temperature for 30 min; after the alkaline cleaning is finished, the temperature is reduced to below 80 ℃ at the cooling rate of 4 ℃/min, and residual liquid is discharged.
(3) Soaping and washing the dyed polyester fabric: injecting soaping liquid into the dye vat, wherein the soaping liquid contains 3g/L soaping agent, and the weight ratio of the soaping liquid to the polyester fabric is 10:1, heating to 100 ℃ at a heating rate of 4 ℃/min, soaping for 10min, neutralizing pH to 7 +/-0.5 with glacial acetic acid, continuously treating for 10min at 100 ℃, and discharging residual liquid; washing with clear water.
The conventional process is as follows:
(1) alkali treatment: washing with water to neutrality in the same step (2);
(2) dyeing, which is the same as the step (1);
(3) reduction and cleaning: injecting reduction cleaning fluid into the dye vat, wherein the reduction cleaning fluid contains 3g/L sodium hydrosulfite, 2g/L sodium hydroxide and 2g/L penetrant JFC (Texas German chemical engineering), raising the temperature to 90 ℃ at the temperature raising speed of 2 ℃/min, and carrying out reduction cleaning for 20 min;
(4) soaping and water washing, the same as the step (3).
The result shows that compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the dyeing method provided by the invention has darker color and equivalent color fastness to washing, but a reduction cleaning solution is not used, the process is simpler, the reagent is saved, the pollution caused by the reagent is prevented, and the process is more environment-friendly.
Example 4
Disperse yellow-brown HA-2R dyed polyester knitted fabric
The invention provides a polyester fabric disperse dyeing reduction-free cleaning process, which comprises the following steps:
(1) dyeing the polyester knitted fabric at high temperature and high pressure: the dye dosage is 2% of the fabric weight, and the leveling agent is 2g/L (NICAC SUNSOLT 7000Z, Rihua chemical Co., Ltd.); preparing a dye solution according to the weight ratio of the dye solution to the fabric of 20:1, heating to 100 ℃ on a high-temperature high-pressure dyeing machine at the speed of 2 ℃/min, and preserving heat for 10 min; heating to 130 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 45 min; and after dyeing is finished, cooling to below 80 ℃ at a cooling rate of 4 ℃/min, and discharging dye liquor.
(2) Alkali washing of the dyed polyester knitted fabric: injecting 5g/L of caustic soda solution into the dye vat, wherein the weight ratio of the caustic soda solution to the fabric is 20:1, heating to 100 ℃ at the heating rate of 2 ℃/min, and keeping the temperature for 40 min; after the alkaline cleaning is finished, the temperature is reduced to below 80 ℃ at the cooling rate of 4 ℃/min, and residual liquid is discharged.
(3) Soaping and washing the dyed polyester fabric: injecting soaping liquid into the dye vat, wherein the soaping liquid contains 2g/L soaping agent, and the weight ratio of the soaping liquid to the polyester fabric is 15:1, heating to 90 ℃ at a heating rate of 2 ℃/min, soaping for 15min, neutralizing pH to 7 +/-0.5 with glacial acetic acid, continuously treating for 15min at 90 ℃, and discharging residual liquid; washing with clear water.
The conventional process is as follows:
(1) alkali treatment: washing with water to neutrality in the same step (2);
(2) dyeing, which is the same as the step (1);
(3) reduction and cleaning: injecting reduction cleaning fluid into the dye vat, wherein the reduction cleaning fluid contains 3g/L sodium hydrosulfite, 2g/L sodium hydroxide and 2g/L penetrant JFC (Texas German chemical engineering), raising the temperature to 90 ℃ at the temperature raising speed of 2 ℃/min, and carrying out reduction cleaning for 20 min;
(4) soaping and water washing, the same as the step (3).
The color characteristics and the fastness to washing of the polyester fabric dyed with disperse yellow-brown HA-2R are shown in tables 3 and 4.
TABLE 3 color characteristics of disperse yellow-brown HA-2R dyed polyester knit fabrics
TABLE 4 color fastness to washing of disperse yellow-brown HA-2R dyed polyester knitted fabric
As can be seen from the table, compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the dyeing method provided by the invention has darker color and equivalent color fastness to washing, but a reduction cleaning solution is not used, so that the process is simpler, the reagent is saved, the pollution caused by the reagent is prevented, and the process is more environment-friendly.
Example 5
Disperse blue HA-RL dyed polyester knitted fabric
The invention provides a polyester fabric disperse dyeing reduction-free cleaning process, which comprises the following steps:
(1) dyeing the polyester knitted fabric at high temperature and high pressure: the dye dosage is 2% of the fabric weight, and the leveling agent is 1.5g/L (NICAC SUNSOLT 7000Z, Rihua chemical Co., Ltd.); preparing a dye solution according to the weight ratio of the dye solution to the fabric of 30:1, heating to 100 ℃ on a high-temperature high-pressure dyeing machine at a speed of 1.5 ℃/min, and preserving heat for 10 min; heating to 130 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 60 min; and after dyeing is finished, cooling to below 80 ℃ at a cooling rate of 4 ℃/min, and discharging dye liquor.
(2) Alkali washing of the dyed polyester knitted fabric: injecting 7.5g/L of caustic soda solution into the dye vat, wherein the weight ratio of the caustic soda solution to the fabric is 30:1, heating to 130 ℃ at the heating rate of 1.5 ℃/min, and keeping the temperature for 30 min; after the alkaline cleaning is finished, the temperature is reduced to below 80 ℃ at the cooling rate of 4 ℃/min, and residual liquid is discharged.
(3) Soaping and washing the dyed polyester fabric: injecting soaping liquid into the dye vat, wherein the soaping liquid contains 3g/L soaping agent, and the weight ratio of the soaping liquid to the polyester fabric is 10:1, heating to 80 ℃ at a heating rate of 2 ℃/min, soaping for 20min, neutralizing pH to 7 +/-0.5 with glacial acetic acid, continuously treating at 80 ℃ for 10min, and discharging residual liquid; washing with clear water.
The conventional process is as follows:
(1) alkali treatment: washing with water to neutrality in the same step (2);
(2) dyeing, which is the same as the step (1);
(3) reduction and cleaning: injecting reduction cleaning fluid into the dye vat, wherein the reduction cleaning fluid contains 3g/L sodium hydrosulfite, 2g/L sodium hydroxide and 2g/L penetrant JFC (Texas German chemical engineering), raising the temperature to 90 ℃ at the temperature raising speed of 2 ℃/min, and carrying out reduction cleaning for 20 min;
(4) soaping and water washing, the same as the step (3).
The color characteristics and the fastness to washing of the polyester fabric dyed with disperse blue HA-RL are shown in tables 5 and 6.
TABLE 5 color characteristics of disperse blue HA-RL dyed polyester knit fabrics
TABLE 6 color fastness to washing of disperse blue HA-RL dyed polyester knitted fabric
As can be seen from the table, compared with the polyester fabric treated by the conventional method, the polyester fabric treated by the dyeing method provided by the invention has darker color and equivalent color fastness to washing, but a reduction cleaning solution is not used, so that the process is simpler, the reagent is saved, the pollution caused by the reagent is prevented, and the process is more environment-friendly.
In the implementation of the invention, the color fastness to washing is determined by referring to AATCC test method 61-2010 'color fastness to washing of textiles'; in the invention, color characteristic values L, a, b, C and h of the dyed polyester knitted fabric are related parameters used for expressing the fabric color in a CIE1976L a b color expression system, wherein L represents lightness, C represents saturation, h represents hue, a represents red and green, and positive values are red and negative values are green; b represents yellow blue, wherein the positive value is yellow, and the negative value is blue; Δ E is the color difference value calculated from the color-related parameters and used to represent the difference in color perception between the two samples.
In the present invention, the solvent of the solution is not particularly described, and all solvents are water.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (9)
1. A polyester fabric disperse dyeing reduction-free cleaning process is characterized in that firstly, high-alkali-resistant disperse dyes are used for dyeing polyester fabrics, then, alkaline solutions are used for treating the dyed polyester fabrics, and then, soaping and water washing are carried out;
the high-alkali-resistance disperse dye is used for dyeing the polyester fabric at high temperature and high pressure in a dye liquor mode;
the dye solution also contains a leveling agent;
in the dye solution, the concentration of a leveling agent is 0.5-3 g/L;
the weight ratio of the dye liquor to the polyester fabric is 10-30: 1;
the leveling agent is an anionic surfactant or a nonionic surfactant or a compound surfactant;
the high-temperature high-pressure dyeing process comprises the following steps:
heating at a heating rate of 0.5-4 deg.C/min to 70-100 deg.C for 5-20 min, and heating to 105-135 deg.C for 30-60 min;
after the high-temperature high-pressure dyeing is finished, cooling to below 80 ℃ at a cooling rate of 0.5-4 ℃/min, and discharging residual liquid;
the high alkali-resistant disperse dye is HA type alkali-resistant disperse dye;
the dosage of the high alkali-resistant disperse dye is 0.1-10% of the weight of the polyester fabric;
the alkaline agent used in the alkaline solution is caustic soda; the concentration of the alkaline solution is 0.5-20 g/L;
the process of treating the dyed polyester fabric by the alkaline solution comprises the following steps: keeping the temperature for 30-60 minutes from 80-130 ℃ at the heating rate of 0.5-4 ℃/minute; then the temperature is reduced to below 80 ℃ at the cooling rate of 0.5-4 ℃/min, and the dye liquor is discharged.
2. The disperse dyeing reduction-free cleaning process for polyester fabrics as claimed in claim 1, wherein the amount of the high alkali-resistant disperse dye is 1-5% of the weight of the polyester fabrics.
3. The disperse dyeing reduction-free cleaning process for the polyester fabric as claimed in claim 1, wherein the polyester fabric comprises a polyester woven, knitted pure or blended fabric.
4. The disperse dyeing reduction-free cleaning process for the polyester fabrics as claimed in any one of claims 1 to 3, wherein the concentration of the alkaline solution is 2 to 10 g/L.
5. The disperse dyeing reduction-free cleaning process for the polyester fabric as claimed in claim 4, wherein the weight ratio of the alkaline solution to the polyester fabric is 3-30: 1.
6. The disperse dyeing reduction-free cleaning process for the polyester fabric as claimed in claim 4, wherein the weight ratio of the alkaline solution to the polyester fabric is 10-25: 1.
7. The disperse dyeing reduction-free cleaning process for the polyester fabric as claimed in claim 4, wherein the weight ratio of the alkaline solution to the polyester fabric is 10-20: 1.
8. The polyester fabric disperse dyeing reduction-free cleaning process according to any one of claims 1 to 3, wherein the reagent for soaping is a soaping agent;
the soaping is carried out by adopting a soaping solution, and the concentration of the soaping agent in the soaping solution is 0.5-3 g/L;
the weight ratio of the soap lotion to the polyester fabric is 10-30: 1.
9. The disperse dyeing reduction-free cleaning process for polyester fabrics as claimed in claim 8, wherein the soaping process is as follows:
soaping for 10-30 minutes at the temperature rising rate of 0.5-4 ℃/minute to 80-100 ℃, adjusting the pH of the solution to 7 +/-0.5, continuously treating for 10-30 minutes, and discharging residual liquid;
the pH value of the solution is adjusted to 7 +/-0.5 by adopting an acidic substance;
the acidic substance is a weakly acidic substance;
the weak acidic substance is acetic acid.
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| CN113026387B (en) * | 2021-03-12 | 2022-07-01 | 杭州福莱蒽特股份有限公司 | Energy-saving emission-reducing dyeing method |
| CN113062131B (en) * | 2021-03-25 | 2022-10-11 | 蓬莱嘉信染料化工股份有限公司 | Short-flow processing technology for polyester-cotton knitted fabric |
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| CN102619099A (en) * | 2012-04-11 | 2012-08-01 | 太仓荣文合成纤维有限公司 | Dyeing method of white bamboo charcoal terylene fiber |
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Effective date of registration: 20210107 Address after: 265600 No.1 Jiaxin Road, Beigou chemical industry park, Penglai City, Yantai City, Shandong Province Patentee after: PENGLAI JIAXIN DYES & CHEMICAL Co.,Ltd. Address before: 214000 1800 Lihu Avenue, Binhu District, Wuxi, Jiangsu Patentee before: Jiangnan University Patentee before: PENGLAI JIAXIN DYES & CHEMICAL Co.,Ltd. |