CN112281511A - Dyeing process for improving dyeability of polyester fabric - Google Patents
Dyeing process for improving dyeability of polyester fabric Download PDFInfo
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- CN112281511A CN112281511A CN201910675639.2A CN201910675639A CN112281511A CN 112281511 A CN112281511 A CN 112281511A CN 201910675639 A CN201910675639 A CN 201910675639A CN 112281511 A CN112281511 A CN 112281511A
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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
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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
-
- 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
- D06P1/667—Organo-phosphorus compounds
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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
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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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
Abstract
The invention relates to the technical field of fabric dyeing processes, in particular to a dyeing process for improving the dyeability of a polyester fabric, which comprises the following steps: sequentially pretreating the terylene fabric, adding the pretreated terylene fabric into a swelling agent solution, carrying out reduced pressure permeation treatment, piling, washing, adding the terylene fabric into a refined solution, carrying out ultrasonic oscillation, adding the terylene fabric into a dye vat filled with a dyeing solution in advance, carrying out ultrasonic dyeing, carrying out microwave heating, shaping by a shaping press roller, and rolling to obtain a finished product. The invention solves the problem that the polyester fabric is poor in dyeing performance and difficult to color in the prior art. The dyeing process provided by the invention improves the dyeability of the polyester fabric by pretreating the polyester fabric, carrying out ultrasonic dyeing, microwave heating fixation and the like in the dyeing process.
Description
Technical Field
The invention relates to the technical field of fabric dyeing processes, in particular to a dyeing process for improving the dyeability of a polyester fabric.
Background
The terylene fabric is a chemical fiber garment fabric which is used in daily life. Its advantages are high wrinkle resistance and shape retention. Therefore, the product is suitable for outdoor articles such as coat clothes, various bags and tents. Dacron has a wide range of applications and is used in a large number of articles of clothing and industry. The flame-retardant polyester has permanent flame retardance and wide application range, and plays a plurality of roles in the field of protective clothing besides playing a role of no substitution in industrial textiles, building interior decoration, vehicle interior decoration and the like.
The terylene fabric has the following advantages: the terylene fabric has outstanding functions of resisting various chemicals, has small damage degree by acid and alkali, and is not afraid of mould and worm damage; the terylene is the cloth with the best heat resistance in the synthetic fiber fabric and has thermoplasticity; the terylene fabric has higher strength and elastic recovery capability, thereby having the characteristics of fastness, durability, crease resistance and no-iron; the terylene fabric has good light resistance, and the sun-proof capability of the terylene fabric is better than that of a natural fiber fabric, and the terylene fabric and the acrylic fabric sit flat. The terylene fabric has the following defects: the moisture absorption is poor, so that the polyester clothes are hot when worn, are simply charged with static electricity and infected with dust, influence the beauty and the comfort level, but are simple and dry after cleaning, almost do not reduce the wet strength, do not deform, and have excellent wearable function; the dyeing property is poor, and because no specific dyeing gene is arranged on a polyester molecular chain and the polarity is small, the dyeing is difficult, the dyeability is poor, dye molecules are not easy to enter fibers, but the color fastness after dyeing is excellent and the color is not easy to fade; the pilling is easy to occur, the polyester fabric is one of the artificially synthesized fiber commodities, but the pilling scene exists in the artificially synthesized fiber cloth, so the pilling scene exists in the polyester fabric commodity after the polyester fabric commodity is used for a period of time; the polyester fabric has poor meltability, holes are simply formed when the polyester fabric meets sparks, cigarette ash and the like, and therefore, the polyester fabric is required to avoid touching of cigarette ends, sparks and the like when being worn.
In the prior art, the dyeing performance of the polyester fabric is poor, and the polyester fabric is difficult to color, so that the condition of low coloring degree is easy to occur in the dyeing process of the polyester fabric, and the quality of the fabric is reduced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a dyeing process for improving the dyeing easiness of a polyester fabric, which is used for solving the problem that the polyester fabric in the prior art is poor in dyeing performance and difficult to dye. The dyeing process provided by the invention improves the dyeability of the polyester fabric by pretreating the polyester fabric, carrying out ultrasonic dyeing, microwave heating fixation and the like in the dyeing process.
In order to attain the above and other related objects,
the invention provides a dyeing process for improving the dyeability of a polyester fabric, which comprises the following steps:
step one, sequentially carrying out alkali washing, acid washing, freezing and drying on a polyester fabric to obtain a pretreated polyester fabric;
step two, adding the polyester fabric pretreated in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, adding a swelling agent solution for permeation treatment, piling, washing with water, adding the polyester fabric into an ultrasonic vibrator, adding a refining solution for ultrasonic oscillation, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance for ultrasonic dyeing, and dehydrating to obtain a dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, shaping by a shaping press roller, and rolling to obtain a finished product.
In the dyeing process, the oligomer of the polyester fabric is discharged as much as possible through pretreatment, so that the content of the oligomer in the dyeing process is reduced, and the problem of difficult coloring caused by excessive oligomer is avoided; the swelling agent is permeated through decompression, and then ultrasonic vibration is carried out, so that the polyester fabric is refined more thoroughly, and the polyester fabric is colored more easily; carrying out ultrasonic dyeing in the dyeing process to improve the dyeing rate, finally further dyeing dyed micromolecules which are not dyed on the surface through microwave heating, and finally shaping through a compression roller, wherein the obtained fabric has high chroma; the dyeability of the polyester fabric is improved on the whole.
Further, the alkali washing in the step one is specifically as follows: putting the polyester fabric into an alkaline detergent with the pH value of 8.5-9.5, washing for 3-5 min at the temperature of 30-40 ℃, heating to 50-60 ℃, washing for 5-10 min, continuously heating to 80-90 ℃, washing for 3-5 min, and cooling to 20-30 ℃ to obtain the polyester fabric after alkaline washing;
the acid washing in the step one is specifically as follows: putting the polyester fabric subjected to alkali washing into an acidic washing agent with the pH value of 5.5-6.5, washing for 3-5 min at the temperature of 30-40 ℃, heating to 50-60 ℃, washing for 5-10 min, continuously heating to 80-90 ℃, washing for 3-5 min, and cooling to 20-30 ℃ to obtain the polyester fabric subjected to acid washing;
the freezing in the first step is as follows: putting the acid-washed terylene fabric into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to 20-30 ℃ to obtain the frozen terylene fabric;
the drying in the first step specifically comprises the following steps: and heating the frozen polyester fabric to 80-100 ℃ and drying for at least 30min to obtain the dried polyester fabric.
In the pretreatment process, alkali washing is firstly carried out, the temperature is gradually increased in the alkali washing process, partial oligomers can be effectively removed, the pH value of the alkali washing is controlled to be weaker, and the oligomers are easier to remove at the moment; the principle is similar in the acid washing process, and the pH value is controlled to be easier to remove the rest of the oligomer.
Further, the refining treatment in the second step is specifically as follows: and (3) performing infiltration treatment by using a swelling agent solution for at least 30min at the vacuum degree of 400-600 mmHg and the temperature of 80-100 ℃, stacking at normal temperature for at least 3h, washing with water, performing ultrasonic oscillation by using a refining solution for at least 30min at the ultrasonic frequency of 30-50 kHz and the temperature of 80-100 ℃, and dehydrating to obtain the refined polyester fabric.
In the refining process, the swelling agent is adopted for decompression and permeation, and then ultrasonic oscillation is carried out, so that the refining effect is improved. The vacuum degree and the temperature are controlled in the decompression and permeation process, the water absorption rate of the fabric is high in the range, and the permeation effect is good; if the vacuum degree is less than 400mmHg, the water absorption rate is low and the infiltration effect is poor, and the water absorption rate does not change greatly when the vacuum degree is more than 60 mmHg.
Further, the swelling agent solution comprises the following components in parts by weight: 1-2 parts of sodium bicarbonate and 2-5 parts of phosphate; the refining solution comprises the following components in parts by weight: 10-20 parts of a refining agent, 1-5 parts of sodium hydroxide and 10-20 parts of purified water.
Further, the pH value of the dyeing solution in the third step is 9.2-9.5. The pH value of the dyeing solution is adjusted to 9.2-9.5, the dyeing rate is high, and the dyeing solution contains dyes and also contains some conventional auxiliary agents, so that the problem is not described excessively. The coloring effect is not very good when the pH value is lower than 9.2, and the coloring effect is similarly poor when the pH value is higher than 9.5.
Further, the ultrasonic dyeing in the third step is specifically as follows: heating to 120-140 ℃ at the ultrasonic frequency of 30-50 kHz and at the heating rate of 0.5-1.0 ℃, and dyeing at constant temperature for at least 30 min. By ultrasonic dyeing, the dyeing effect is better and more uniform, and the dyeing is easier. The coloring can be better realized by controlling the temperature rising rate in the dyeing process.
Furthermore, the microwave heating power in the fourth step is 400-500W, and the heating time is 3-5 min. The dyed small molecules with no surface coloring are further dyed by microwave heating.
Further, the temperature of the shaping press roll in the fourth step is 40-50 ℃, and the running speed of the shaping press roll is 10-20 m/min. After dyeing is finished, the fabric can be smoother by the preheated shaping compression roller at a certain temperature, and the dyed fabric can be obtained by rolling by controlling the running speed.
As mentioned above, the dyeing process for improving the dyeability of the polyester fabric has the following beneficial effects: in the dyeing process, the oligomer of the polyester fabric is discharged as much as possible through pretreatment, so that the content of the oligomer in the dyeing process is reduced, and the problem of difficult coloring caused by excessive oligomer is avoided; the swelling agent is permeated through decompression, and then ultrasonic vibration is carried out, so that the polyester fabric is refined more thoroughly, and the polyester fabric is colored more easily; carrying out ultrasonic dyeing in the dyeing process to improve the dyeing rate, finally further dyeing dyed micromolecules which are not dyed on the surface through microwave heating, and finally shaping through a compression roller, wherein the obtained fabric has high chroma; the dyeability of the polyester fabric is improved on the whole.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Example 1
A dyeing process for improving the dyeability of polyester fabrics comprises the following steps:
firstly, sequentially processing a polyester fabric as follows:
a, alkaline washing: putting the terylene fabric into an alkaline detergent with the pH value of 8.5, washing for 5min at the temperature of 30 ℃, heating to 50 ℃ for washing for 10min, continuously heating to 80 ℃ for washing for 5min, and cooling to 20 ℃ to obtain the terylene fabric after alkaline washing;
b, acid washing: putting the polyester fabric subjected to alkali washing into an acid detergent with the pH value of 5.5, washing at the temperature of 30 ℃ for 5min, heating to 50 ℃ for washing for 10min, continuing heating to 80 ℃ for washing for 5min, and cooling to 20 ℃ to obtain the polyester fabric subjected to acid washing;
c, freezing: putting the polyester fabric after acid washing into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to room temperature to obtain the frozen polyester fabric;
d, drying: heating the frozen terylene fabric to 80 ℃ and drying for at least 30min to obtain the dried terylene fabric;
step two, adding the dried polyester fabric in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, performing permeation treatment by using a swelling agent solution at a vacuum degree of 400mmHg and a temperature of 80 ℃ for at least 30min, then stacking at normal temperature for at least 3h, washing with water, performing ultrasonic vibration by using a refining solution at an ultrasonic frequency of 30kHz and a temperature of 80 ℃ for at least 30min, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance, wherein the pH value of the dyeing solution is 9.2, heating to 120 ℃ at the ultrasonic frequency of 30kHz and at the heating rate of 0.5 ℃, dyeing at constant temperature for at least 30min, and dehydrating to obtain the dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, wherein the microwave heating power is 400W, the heating time is 3min, then carrying out setting by a setting press roller, wherein the temperature of the setting press roller is 40 ℃, the running speed of the setting press roller is 10m/min, and rolling to obtain a finished product.
Specifically, the swelling agent solution comprises the following components in parts by weight: 1 part of sodium bicarbonate and 2 parts of phosphate; the refining solution comprises the following components in parts by weight: 10 parts of refining agent, 1 part of sodium hydroxide and 10 parts of purified water.
The water absorption rate of the polyester fabric dyed in the embodiment is 850% in the permeation process, the dyeing degree is high, and the color fastness is 4-5 grade.
Example 2
A dyeing process for improving the dyeability of polyester fabrics comprises the following steps:
firstly, sequentially processing a polyester fabric as follows:
a, alkaline washing: putting the terylene fabric into an alkaline detergent with the pH value of 9.5, washing for 3min at the temperature of 40 ℃, heating to 60 ℃, washing for 5min, continuously heating to 90 ℃, washing for 3min, and cooling to 30 ℃ to obtain the terylene fabric after alkaline washing;
b, acid washing: putting the polyester fabric subjected to alkali washing into an acidic detergent with the pH value of 6.5, washing for 3min at the temperature of 40 ℃, heating to 60 ℃, washing for 5min, continuously heating to 90 ℃, washing for 3min, and cooling to 30 ℃ to obtain the polyester fabric subjected to acid washing;
c, freezing: putting the polyester fabric after acid washing into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to room temperature to obtain the frozen polyester fabric;
d, drying: heating the frozen polyester fabric to 100 ℃ and drying for at least 30min to obtain the dried polyester fabric;
step two, adding the dried polyester fabric in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, performing permeation treatment by using a swelling agent solution at a vacuum degree of 600mmHg and a temperature of 100 ℃ for at least 30min, then stacking at normal temperature for at least 3h, washing with water, performing ultrasonic vibration by using a refining solution at an ultrasonic frequency of 50kHz and a temperature of 100 ℃ for at least 30min, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance, wherein the pH value of the dyeing solution is 9.5, heating to 140 ℃ at the ultrasonic frequency of 50kHz and the heating rate of 1.0 ℃, dyeing at constant temperature for at least 30min, and dehydrating to obtain the dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, wherein the microwave heating power is 500W, the heating time is 5min, then carrying out setting by a setting press roller, wherein the temperature of the setting press roller is 50 ℃, the running speed of the setting press roller is 20m/min, and rolling to obtain a finished product.
Specifically, the swelling agent solution comprises the following components in parts by weight: 2 parts of sodium bicarbonate, 5 parts of phosphate; the refining solution comprises the following components in parts by weight: 20 parts of refining agent, 5 parts of sodium hydroxide and 20 parts of purified water.
The polyester fabric dyed in the embodiment has the water absorption rate of 900% in the permeation process, the dyeing degree is high, and the color fastness is 4-5 grade.
Example 3
A dyeing process for improving the dyeability of polyester fabrics comprises the following steps:
firstly, sequentially processing a polyester fabric as follows:
a, alkaline washing: putting the polyester fabric into an alkaline detergent with the pH value of 9.0, washing for 4min at the temperature of 35 ℃, heating to 55 ℃, washing for 8min, continuously heating to 85 ℃, washing for 4min, and cooling to 25 ℃ to obtain the polyester fabric after alkaline washing;
b, acid washing: putting the polyester fabric subjected to alkali washing into an acid detergent with the pH value of 6.0, washing for 4min at the temperature of 35 ℃, heating to 55 ℃, washing for 8min, continuously heating to 85 ℃, washing for 4min, and cooling to 25 ℃ to obtain the polyester fabric subjected to acid washing;
c, freezing: putting the polyester fabric after acid washing into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to room temperature to obtain the frozen polyester fabric;
d, drying: heating the frozen polyester fabric to 90 ℃ and drying for at least 30min to obtain the dried polyester fabric;
step two, adding the polyester fabric pretreated in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, performing permeation treatment by using a swelling agent solution at a vacuum degree of 500mmHg and a temperature of 90 ℃ for at least 30min, then stacking at normal temperature for at least 3h, washing with water, performing ultrasonic vibration by using a refining solution at an ultrasonic frequency of 40kHz and a temperature of 90 ℃ for at least 30min, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance, wherein the pH value of the dyeing solution is 9.3, heating to 130 ℃ at the ultrasonic frequency of 40kHz and at the heating rate of 0.5 ℃, dyeing at constant temperature for at least 30min, and dehydrating to obtain the dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, wherein the microwave heating power is 450W, the heating time is 4min, then carrying out setting by a setting press roller, wherein the temperature of the setting press roller is 45 ℃, the running speed of the setting press roller is 15m/min, and rolling to obtain a finished product.
Specifically, the swelling agent solution comprises the following components in parts by weight: 2 parts of sodium bicarbonate, 3 parts of phosphate ester; the refining solution comprises the following components in parts by weight: 15 parts of refining agent, 3 parts of sodium hydroxide and 15 parts of purified water.
The water absorption rate of the polyester fabric dyed in the embodiment is 880%, the dyeing degree is high, and the color fastness is 4-5 levels in the permeation process.
Example 4
A dyeing process for improving the dyeability of polyester fabrics comprises the following steps:
firstly, sequentially processing a polyester fabric as follows:
a, alkaline washing: putting the polyester fabric into an alkaline detergent with the pH value of 9.0, washing for 4min at the temperature of 35 ℃, heating to 55 ℃, washing for 8min, continuously heating to 85 ℃, washing for 4min, and cooling to 25 ℃ to obtain the polyester fabric after alkaline washing;
b, acid washing: putting the polyester fabric subjected to alkali washing into an acid detergent with the pH value of 6.0, washing for 4min at the temperature of 35 ℃, heating to 55 ℃, washing for 8min, continuously heating to 85 ℃, washing for 4min, and cooling to 25 ℃ to obtain the polyester fabric subjected to acid washing;
c, freezing: putting the polyester fabric after acid washing into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to room temperature to obtain the frozen polyester fabric;
d, drying: heating the frozen polyester fabric to 90 ℃ and drying for at least 30min to obtain the dried polyester fabric;
step two, adding the polyester fabric pretreated in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, performing permeation treatment by using a swelling agent solution at a vacuum degree of 500mmHg and a temperature of 100 ℃ for at least 30min, then stacking at normal temperature for at least 3h, washing with water, performing ultrasonic vibration by using a refining solution at an ultrasonic frequency of 50kHz and a temperature of 80 ℃ for at least 30min, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance, wherein the pH value of the dyeing solution is 9.4, heating to 120 ℃ at the ultrasonic frequency of 50kHz and at the heating rate of 0.5 ℃, dyeing at constant temperature for at least 30min, and dehydrating to obtain the dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, wherein the microwave heating power is 400W, the heating time is 5min, then carrying out setting by a setting press roller, wherein the temperature of the setting press roller is 50 ℃, the running speed of the setting press roller is 10m/min, and rolling to obtain a finished product.
Specifically, the swelling agent solution comprises the following components in parts by weight: 2 parts of sodium bicarbonate, 5 parts of phosphate; the refining solution comprises the following components in parts by weight: 12 parts of refining agent, 4 parts of sodium hydroxide and 15 parts of purified water.
The polyester fabric dyed in the embodiment has the water absorption rate of 890 percent in the permeation process, high dyeing rate and color fastness of 4-5 grades.
In conclusion, the dyeing process provided by the invention improves the dyeability of the polyester fabric by means of pretreatment of the polyester fabric, ultrasonic dyeing, microwave heating fixation and the like in the dyeing process. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A dyeing process for improving the dyeability of polyester fabrics is characterized by comprising the following steps:
step one, sequentially carrying out alkali washing, acid washing, freezing and drying on a polyester fabric to obtain a pretreated polyester fabric;
step two, adding the polyester fabric pretreated in the step one into a clean water tank for water absorption and dehydration, putting the dehydrated polyester fabric into a reduced pressure permeation machine, adding a swelling agent solution for permeation treatment, piling, washing with water, adding the polyester fabric into an ultrasonic vibrator, adding a refining solution for ultrasonic oscillation, and dehydrating to obtain the refined polyester fabric;
step three, adding the refined polyester fabric in the step two into a dye vat which is filled with a dyeing solution in advance for ultrasonic dyeing, and dehydrating to obtain a dyed polyester fabric;
and step four, carrying out microwave heating on the polyester fabric dyed in the step three, shaping by a shaping press roller, and rolling to obtain a finished product.
2. The dyeing process for improving the dyeability of the polyester fabric according to claim 1, characterized in that: the alkali washing in the first step is specifically as follows: putting the polyester fabric into an alkaline detergent with the pH value of 8.5-9.5, washing for 3-5 min at the temperature of 30-40 ℃, heating to 50-60 ℃, washing for 5-10 min, continuously heating to 80-90 ℃, washing for 3-5 min, and cooling to 20-30 ℃ to obtain the polyester fabric after alkaline washing;
the acid washing in the step one is specifically as follows: putting the polyester fabric subjected to alkali washing into an acidic washing agent with the pH value of 5.5-6.5, washing for 3-5 min at the temperature of 30-40 ℃, heating to 50-60 ℃, washing for 5-10 min, continuously heating to 80-90 ℃, washing for 3-5 min, and cooling to 20-30 ℃ to obtain the polyester fabric subjected to acid washing;
the freezing in the first step is as follows: putting the acid-washed terylene fabric into a freezer at the temperature of-5-0 ℃ for freezing for at least 20min, and heating to 20-30 ℃ to obtain the frozen terylene fabric;
the drying in the first step specifically comprises the following steps: and heating the frozen polyester fabric to 80-100 ℃ and drying for at least 30min to obtain the dried polyester fabric.
3. The dyeing process for improving the dyeability of the polyester fabric according to claim 1, characterized in that: the refining treatment in the step two is specifically as follows: and (3) performing infiltration treatment by using a swelling agent solution for at least 30min at the vacuum degree of 400-600 mmHg and the temperature of 80-100 ℃, stacking at normal temperature for at least 3h, washing with water, performing ultrasonic oscillation by using a refining solution for at least 30min at the ultrasonic frequency of 30-50 kHz and the temperature of 80-100 ℃, and dehydrating to obtain the refined polyester fabric.
4. The dyeing process for improving the dyeability of the polyester fabric according to claim 1 or 3, characterized in that: the swelling agent solution comprises the following components in parts by weight: 1-2 parts of sodium bicarbonate and 2-5 parts of phosphate; the refining solution comprises the following components in parts by weight: 10-20 parts of a refining agent, 1-5 parts of sodium hydroxide and 10-20 parts of purified water.
5. The dyeing process for improving the dyeability of the polyester fabric according to claim 1, characterized in that: and the pH value of the dyeing solution in the third step is 9.2-9.5.
6. The dyeing process for improving the dyeability of the polyester fabric according to claim 1 or 5, which is characterized in that: the ultrasonic dyeing in the third step is specifically as follows: heating to 120-140 ℃ at the ultrasonic frequency of 30-50 kHz and at the heating rate of 0.5-1.0 ℃, and dyeing at constant temperature for at least 30 min.
7. The dyeing process for improving the dyeability of the polyester fabric according to claim 1, characterized in that: in the fourth step, the microwave heating power is 400-500W, and the heating time is 3-5 min.
8. The dyeing process for improving the dyeability of the polyester fabric according to claim 1 or 7, which is characterized in that: in the fourth step, the temperature of the shaping press roll is 40-50 ℃, and the running speed of the shaping press roll is 10-20 m/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114164683A (en) * | 2021-12-01 | 2022-03-11 | 江苏珈诚纺织有限公司 | Finishing and dyeing method for producing anti-static hydrophobic fabric |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164683A (en) * | 2021-12-01 | 2022-03-11 | 江苏珈诚纺织有限公司 | Finishing and dyeing method for producing anti-static hydrophobic fabric |
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Application publication date: 20210129 |