CN111748418A - Low-temperature cleaning agent and application thereof in washing process after dyeing of polyester knitted fabric - Google Patents
Low-temperature cleaning agent and application thereof in washing process after dyeing of polyester knitted fabric Download PDFInfo
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- CN111748418A CN111748418A CN202010719451.6A CN202010719451A CN111748418A CN 111748418 A CN111748418 A CN 111748418A CN 202010719451 A CN202010719451 A CN 202010719451A CN 111748418 A CN111748418 A CN 111748418A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/825—Mixtures of compounds all of which are non-ionic
-
- 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
-
- 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
- D06P5/04—After-treatment with organic compounds
- D06P5/08—After-treatment with organic compounds macromolecular
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
Abstract
The invention relates to the technical field of dyeing and finishing of polyester fabrics, and particularly discloses a low-temperature cleaning agent and application thereof in a washing process after dyeing of polyester knitted fabrics, wherein the low-temperature cleaning agent is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to the mass ratio of (0.5-3): 1, the concentration is 0.5-4.0 g/L when the low-temperature cleaning agent is applied, the cleaning time is 5-60 min, the cleaning temperature is 50-90 ℃, and the pH value of the cleaning agent is adjusted to be more than 8. The low-temperature cleaning agent is suitable for cleaning the polyester knitted fabric at low temperature under the alkaline condition, can efficiently remove the floating color on the surface of the fiber, suspends the dye which is not dyed in the aqueous solution, is an odorless environment-friendly safe cleaning agent, can replace the conventional vat-cleaned sodium hydrosulfite, can eliminate the potential safety hazards of the sodium hydrosulfite such as burning when meeting water, flying dust and pungent smell, achieves equivalent color fastness and obviously reduces the COD value of the residual liquid.
Description
Technical Field
The invention belongs to the technical field of dyeing and finishing of polyester fabrics, and particularly relates to a low-temperature cleaning agent and application thereof in a washing process after dyeing of polyester knitted fabrics.
Background
The dyeing post-treatment of deep color in the polyester knitted fabric is carried out by using sodium hydrosulfite/caustic soda for reduction cleaning in most of current dye factories. The method has long process time consumption, high cost, large water consumption, high COD of the residual liquid and great potential safety hazard of the sodium hydrosulfite. Therefore, it is necessary to develop a novel environment-friendly, energy-saving and safe low-temperature cleaning agent to replace sodium hydrosulfite.
Disclosure of Invention
The invention aims to provide a washing process after dyeing of a polyester knitted fabric and a low-temperature cleaning agent thereof, which replace the traditional sodium hydrosulfite, are environment-friendly, energy-saving and safe, meet the requirement on color fastness and can reduce the COD value of residual liquid discharge.
In order to achieve the purpose, the invention adopts the technical scheme that:
the low-temperature cleaning agent is prepared from fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of (0.5-3): 1 and a proper amount of deionized water.
In addition, the invention also provides the application of the low-temperature cleaning agent in the washing process after the dyeing of the polyester knitted fabric, wherein the concentration of the low-temperature cleaning agent is 0.5-4.0 g/L, the cleaning time is 5-60 min, the cleaning temperature is 50-90 ℃, and the pH value of the cleaning agent is adjusted to be more than 8.
The water washing process after dyeing of the polyester knitted fabric comprises the following specific steps:
step a), cleaning with a low-temperature cleaning agent: draining liquid and feeding water after dyeing, adding 0.5-4.0 g/L of the low-temperature cleaning agent, adjusting the pH value to be more than 8, then heating to 50-90 ℃, keeping the temperature and cleaning for 5-60 min, and draining liquid;
step b), primary water washing: feeding water, washing with water at normal temperature for 5-20 min, and then discharging liquid;
step c), acid washing: adding glacial acetic acid into water, heating to 50-60 ℃, keeping the temperature for 5-20 min, and discharging the liquid;
step d), secondary water washing: and (4) feeding water, washing with water at normal temperature for 5-20 min, and then discharging the liquid.
Wherein: in the step a), caustic soda, calcined soda or baking soda is used for adjusting the pH value.
Compared with the prior art, the invention has the following beneficial effects:
the low-temperature cleaning agent is suitable for cleaning the polyester knitted fabric at low temperature under the alkaline condition, can efficiently remove the floating color on the surface of the fiber, suspends the dye which is not dyed in the aqueous solution, is an odorless environment-friendly safe cleaning agent, can achieve the soaping color fastness and the rubbing color fastness which are equivalent to those of the traditional alkaline reduction cleaning, obviously reduces the COD value of residual liquid, can replace the traditional reduction cleaning sodium hydrosulfite, and can eliminate the potential safety hazards of the sodium hydrosulfite such as water burning, dust flying and pungent smell. Moreover, the washing cycle of the dyed polyester knitted fabric is shorter than that of the traditional reduction washing, the hot washing step is omitted, and the energy is saved and the consumption is reduced.
Detailed Description
Example 1
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 1: 1.
The embodiment utilizes the low-temperature cleaning agent to carry out water washing after carrying out bright red dyeing on 32s polyester staple fiber single jersey, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 3.0g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 12.9 by using 1g/L of caustic soda, then heating to 70 ℃, keeping the temperature, cleaning for 20min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 2
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 3: 2.
In this embodiment, the low-temperature cleaning agent is used for washing 32s polyester staple fiber single jersey after black dyeing, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 12 after dyeing, adding 3.0g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 12.9 by using 1g/L of caustic soda, then heating to 70 ℃, keeping the temperature, cleaning for 20min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 3
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 1: 1.
The embodiment utilizes the low-temperature cleaning agent to carry out water washing after carrying out fluorescent orange dyeing on 32s polyester staple fiber single jersey, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquid and water after dyeing, adding 3.0g/L of the low-temperature cleaning agent at a bath ratio of 1: 15, adjusting the pH value of the cleaning liquid to 12.9 by using 1g/L of caustic soda, then heating to 70 ℃, keeping the temperature, cleaning for 20min, and then discharging liquid;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 4
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 5: 3.
In this embodiment, the low-temperature cleaning agent is used for washing 150D +75D polyester spandex double-sided fabric after black dyeing, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 2.5g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 12.5 by using 1g/L of caustic soda, then heating to 80 ℃, keeping the temperature, cleaning for 30min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 0.5g/L glacial acetic acid, heating to 60 deg.C, keeping the temperature for 15min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 5
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 2: 1.
In this embodiment, the low-temperature cleaning agent is used for washing 150D +75D polyester spandex double-sided fabric after black dyeing, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 4.0g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 11.2 by using 1g/L of soda ash, then heating to 70 ℃, keeping the temperature, cleaning for 20min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 6
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 3: 2.
The embodiment utilizes the low-temperature cleaning agent to carry out water washing after carrying out fluorescent orange dyeing on 32s polyester staple fiber single jersey, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 2.5g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 9.5 by using 1g/L of soda ash, then heating to 90 ℃, keeping the temperature, cleaning for 10min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 7
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 5: 2.
The embodiment utilizes the low-temperature cleaning agent to carry out water washing after carrying out bright red dyeing on 32s polyester staple fiber single jersey, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 4.0g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 10.5 by using 1g/L of soda ash, then heating to 60 ℃, keeping the temperature, cleaning for 50min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Example 8
The embodiment provides a low-temperature cleaning agent which is prepared by adding a proper amount of deionized water into fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of 4: 5.
In this embodiment, the low-temperature cleaning agent is used for washing 150D +75D polyester spandex double-sided fabric after black dyeing, and the specific steps are as follows:
step a), cleaning with a low-temperature cleaning agent: discharging liquor and feeding water at a bath ratio of 1: 10 after dyeing, adding 1.0g/L of the low-temperature cleaning agent, adjusting the pH value of the cleaning solution to 11 by using 1g/L of soda ash, then heating to 70 ℃, keeping the temperature, cleaning for 60min, and then discharging liquor;
step b), primary water washing: water is fed, the mixture is washed for 10min at normal temperature, and then liquid is discharged;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 15min, and discharging liquid;
step d), secondary water washing: and (4) feeding water, washing for 10min at normal temperature, and then discharging liquid.
Comparative example 1
This comparative example 3 differs from the above example 4 only in that: in the step a), 0.5g/L of glacial acetic acid is adopted as a pH regulator, and the pH value of the cleaning solution is regulated to 4.12.
Comparative example 2
The comparative example 2 adopts the conventional alkaline reduction cleaning process to carry out bright red dyeing on 32s polyester staple fiber single jersey and then carries out water washing, and the specific steps are as follows:
step a), reduction cleaning: draining, feeding water at a bath ratio of 1: 10, adding sodium hydrosulfite 3.0g/L and 1g/L caustic soda, heating to 85 deg.C, cleaning for 20min, and draining;
step b), primary water washing: feeding water, heating to 60 deg.C, washing for 10min, and discharging liquid;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), hot water washing: feeding water, heating to 95 ℃, keeping the temperature, washing for 10min, and discharging liquid;
and e), washing with water at normal temperature for 10min, and then discharging liquid.
Comparative example 3
The comparative example 3 adopts a conventional alkaline reduction cleaning process to carry out black dyeing on 32s polyester staple fiber single jersey and then carries out water washing, and the specific steps are as follows:
step a), reduction cleaning: draining, feeding water at a bath ratio of 1: 10, adding sodium hydrosulfite 3.0g/L and 1g/L caustic soda, heating to 85 deg.C, cleaning for 20min, and draining;
step b), primary water washing: feeding water, heating to 60 deg.C, washing for 10min, and discharging liquid;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), hot water washing: feeding water, heating to 95 ℃, keeping the temperature, washing for 10min, and discharging liquid;
and e), washing with water at normal temperature for 10min, and then discharging liquid.
Comparative example 4
The comparative example 4 adopts a conventional alkaline reduction cleaning process to carry out fluorescent orange dyeing on 32s polyester staple fiber single jersey and then carries out water washing, and the specific steps are as follows:
step a), reduction cleaning: discharging liquid and feeding water after dyeing, adding sodium hydrosulfite 3.0g/L and caustic soda 1g/L according to a bath ratio of 1: 10, heating to 85 ℃, keeping the temperature, cleaning for 20min, and discharging liquid;
step b), primary water washing: feeding water, heating to 60 deg.C, washing for 10min, and discharging liquid;
step c), acid washing: feeding water, adding 1.5g/L glacial acetic acid, heating to 60 ℃, keeping the temperature for 10min, and discharging liquid;
step d), hot water washing: feeding water, heating to 95 ℃, keeping the temperature, washing for 10min, and discharging liquid;
and e), washing with water at normal temperature for 10min, and then discharging liquid.
After the dyeing and washing are carried out according to the process formula, the six-fiber soaping color fastness, the rubbing color fastness and the COD value of the washing residual liquid are tested. Wherein: measuring the soaping resistance color fastness according to a GB/T3921-2008(C3) color fastness test; and (4) determining the color fastness to rubbing according to a GB/T3920-2008 color fastness test.
The COD value is measured by a potassium dichromate method: dissolving the dye auxiliary agent by using distilled water, taking 5ml of water sample, 5ml of potassium dichromate standard solution, 5ml of silver sulfate catalyst and a small amount of mercury sulfate, and shaking uniformly. Turning the microwave oven for 6 minutes at high temperature, cooling, transferring into a titration flask (washing the digestion tank with a little clear water), adding 2-3 drops of ferronium sulfate indicator into the flask, titrating with a standard solution of ferrous ammonium sulfate until the solution turns from yellow to blue-green, and recording the volume V of the standard solution of ferrous ammonium sulfate1. Meanwhile, 5ml of distilled water is used for replacing a water sample, other steps are the same as the operation of measuring the sample, and the volume V of the standard solution for consuming the ferrous ammonium sulfate is recorded0。
And (3) calculating:
c- - -ferrous ammonium sulfate standard solution concentration, mol/l;
V0-blank consumption ferrous ammonium sulfate standard solution volume, ml;
V1-water sample consumption ferrous ammonium sulfate standard solution volume, ml;
V2volume of water sample, ml:
8-represents the molar mass g/mol of oxygen;
the test results are shown in Table 1.
Table 1: results of soaping color fastness, rubbing color fastness and COD value tests of examples 1 to 7 and comparative examples 1 to 6 of the invention
The analysis of test data in Table 1 shows that the soaping color fastness tested by the low-temperature cleaning agent disclosed by the invention is basically consistent with red and black, fluorescent orange except cotton, terylene and acrylic fibers is consistent with sodium hydrosulfite, and the others are higher by 0.5 grade; the low-temperature cleaning agent is slightly better than sodium hydrosulfite in color fastness to rubbing; the COD value of the cleaning residual liquid is about 10 percent lower than that of sodium hydrosulfite, so that the COD value of the residual liquid discharge can be reduced.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (5)
1. The low-temperature cleaning agent is characterized in that: the low-temperature cleaning agent is prepared from fatty alcohol-polyoxyethylene ether and polyoxyethylene alkyl aryl ether according to a mass ratio of (0.5-3): 1 and a proper amount of deionized water.
2. The application of the low-temperature cleaning agent as claimed in claim 1 in the washing process after dyeing of the polyester knitted fabric is characterized in that: the concentration of the low-temperature cleaning agent is 0.5-4.0 g/L, the cleaning time is 5-60 min, the cleaning temperature is 50-90 ℃, and the pH value of the cleaning solution is adjusted to be more than 8.
3. The application of the low-temperature cleaning agent as claimed in claim 2 in the washing process after dyeing of the polyester knitted fabric is characterized in that: the concentration of the low-temperature cleaning agent is 2.5 g/L-3.0 g/L, the cleaning time is 20 min-30 min, the cleaning temperature is 70-80 ℃, and the pH value of the cleaning solution is adjusted to be more than 12.
4. The post-dyeing washing process of the polyester knitted fabric as claimed in claim 2, which is characterized in that: the method comprises the following specific steps:
step a), cleaning with a low-temperature cleaning agent: draining liquid and feeding water after dyeing, adding 0.5-4.0 g/L of the low-temperature cleaning agent, adjusting the pH value to be more than 8, then heating to 50-90 ℃, keeping the temperature and cleaning for 5-60 min, and draining liquid;
step b), primary water washing: feeding water, washing with water at normal temperature for 5-20 min, and then discharging liquid;
step c), acid washing: adding glacial acetic acid into water, heating to 50-60 ℃, keeping the temperature for 5-20 min, and discharging the liquid;
step d), secondary water washing: and (4) feeding water, washing with water at normal temperature for 5-20 min, and then discharging the liquid.
5. A cryogenic cleaning formulation as claimed in claim 4 wherein: in the step a), caustic soda, calcined soda or baking soda is used for adjusting the pH value.
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| CN202010719451.6A CN111748418A (en) | 2020-07-23 | 2020-07-23 | Low-temperature cleaning agent and application thereof in washing process after dyeing of polyester knitted fabric |
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