CN108486854B - Desizing method of fabric - Google Patents
Desizing method of fabric Download PDFInfo
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- CN108486854B CN108486854B CN201810228280.XA CN201810228280A CN108486854B CN 108486854 B CN108486854 B CN 108486854B CN 201810228280 A CN201810228280 A CN 201810228280A CN 108486854 B CN108486854 B CN 108486854B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/14—De-sizing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/20—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents combined with mechanical means
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses a desizing method of fabric, which comprises the following steps: the method comprises the following steps of sequentially carrying out plasma treatment, drying treatment and desizing treatment in the process of conveying a fabric to be treated on a conveying mechanism; wherein the moisture regain of the fabric is controlled to be 3-8% before plasma treatment, the moving speed of the fabric on the conveying mechanism is 50-70m/min, and the moisture regain of the fabric after plasma treatment is controlled to be 2-7% in drying treatment; the invention can realize the continuous production of the plasma treatment and the desizing treatment process, and has the advantages of high desizing rate, high desizing speed, great reduction of the use amount of chemicals in the desizing liquid, further reduction of pollution and the like.
Description
Technical Field
The invention belongs to the field of textile dyeing and finishing processing, and particularly relates to a desizing method of a fabric.
Background
The desizing treatment of traditional textile printing and dyeing refers to a process for removing sizing agent on a fabric and impurities attached to fabric fibers, wherein the sizing agent on the fabric (mainly including starch sizing agent, polyvinyl alcohol, polyacrylic acid sizing agent and the like, and after warp sizing, the sizing agent can form a sizing film with a smooth surface, a compact structure and hydrophobicity on the surface of yarns) can influence the wettability of the fabric in the dyeing and finishing process and prevent dyes such as chemicals from contacting the fabric, so that the fabric needs to be subjected to desizing treatment before dyeing and finishing.
The desizing treatment method mainly comprises enzyme desizing, alkali desizing, oxidant desizing and the like at present, the desizing process mainly comprises swelling, dissolving and washing of sizing agent, and a compact size film on the surface of the fabric greatly increases the difficulty of removing the sizing agent from the fabric. For most of the slurries, the alkaline desizing method is widely used, and in order to improve the desizing and scouring efficiency, sodium hydroxide, a refining agent, a penetrant, etc. are used in large amounts, and further, the slurries are swelled and washed away in the desizing liquid, and most of the impurities are removed, while chemicals such as sodium hydroxide, etc. used in large amounts, and slurries such as polyvinyl alcohol, etc. which are difficult to degrade, are present in the desizing wastewater, causing great environmental pollution. In the printing and dyeing wastewater, the COD amount generated by the pretreatment wastewater accounts for 60-70% of the total COD discharge amount, wherein the desizing accounts for about 80%, namely, the desizing accounts for 50-55% of the total COD discharge amount of a printing and dyeing mill. Therefore, the fabric desizing link is improved, the COD (chemical oxygen demand) emission is reduced, the energy consumption is reduced, and the fabric desizing method has important significance for saving energy, reducing consumption and reducing pollution in the whole printing and dyeing industry.
At present, the plasma treatment technology is applied to a desizing method, namely, a fabric is subjected to plasma treatment firstly and then placed in desizing liquid for desizing treatment, the method can help to reduce the using amount of chemicals in the desizing liquid, reduce the discharge amount of pollutants and improve the desizing rate, however, the application process has discontinuous treatment processes, namely the plasma treatment and the desizing liquid treatment are completed step by step, and the intermittent processing causes low production efficiency and higher cost, and is extremely not beneficial to industrial mass production.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide an improved fabric desizing method, which can realize continuous production in the plasma treatment and desizing treatment processes, has high desizing rate and high desizing speed, can greatly reduce the use amount of chemicals in the desizing liquid so as to reduce pollution, and can further improve the mechanical property of the treated fabric.
In order to solve the technical problems, the invention adopts a technical scheme as follows:
a method of desizing a fabric, said desizing method comprising the steps of: the method comprises the following steps of sequentially carrying out plasma treatment, drying treatment and desizing treatment in the process of conveying a fabric to be treated on a conveying mechanism; wherein the moisture regain of the fabric is controlled to be 3-8% before the plasma treatment, the moving speed of the fabric on the conveying mechanism is 50-70m/min, and the moisture regain of the fabric treated by the plasma is controlled to be 2-7% in the drying treatment.
According to some preferred aspects of the present invention, the moisture regain of the fabric is controlled to be 4-8% before the plasma treatment is performed.
According to some preferred aspects of the present invention, the moisture regain of the plasma-treated fabric in the drying process is controlled to be 3 to 6%.
According to some preferred aspects of the present invention, the drying treatment is performed at a temperature of 30 to 75 ℃.
According to the invention, the plasma treatment is carried out by a double-medium barrier subluminescence discharge atmospheric pressure plasma device, wherein the working gas is one or more of air, argon, helium, nitrogen and oxygen, the flow rate of the working gas is 1-10L/min, the power supply power is 8-12kw, the input voltage is 10000-50000V, and the current is 3-20A.
According to some preferred aspects of the present invention, the double-dielectric barrier sub-glow discharge atmospheric pressure plasma device comprises at least one set of working electrodes arranged in parallel, an insulating material coated on each of the working electrodes, a gas supply mechanism for supplying gas between the working electrodes, and a working power supply connected with the working electrodes, wherein a channel for the fabric to pass through is formed between each set of the working electrodes.
According to some specific and preferred aspects of the invention, the device has at least 30 sets of working electrodes arranged in opposing parallel.
According to some preferred aspects of the present invention, a height of a gap between the fabric and the working electrode is 0.5 to 3 mm.
According to some preferred aspects of the invention, the temperature of the desizing liquid in the desizing treatment is 60-100 ℃.
According to some particular and preferred aspects of the invention, the desizing treatment is in particular: sequentially carrying out boiling-off treatment and padding treatment on the dried fabric through a plurality of desizing liquid padding grooves, steaming and washing; and controlling the rolling residual rate of the fabric subjected to padding treatment in each desizing liquid padding groove to be different.
According to the invention, 8 desizing liquid immersion rolling tanks are arranged, and water washing is divided into hot water washing and cold water washing. The padding treatment is used for controlling the rolling residual rate of the boiled fabric.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the fabric desizing method can realize continuous desizing production, wherein the desizing rate of the fabric is well improved on the basis of continuous production by controlling the moisture regain, controlling the moving speed of the fabric in the continuous production process and controlling the environment condition (keeping dry) of the fabric moving between plasma treatment and desizing treatment, the desizing rate is high, the use amount of chemicals in the desizing liquid can be greatly reduced, the pollution is further reduced, meanwhile, the mechanical property of the treated fabric is improved to a certain extent, the production cost is reduced, and the fabric desizing method is suitable for continuous industrial large-scale production.
Drawings
FIG. 1 is a process flow diagram of a method of desizing a fabric according to the present invention;
FIG. 2 is a schematic diagram of a dual-dielectric barrier sub-glow discharge atmospheric pressure plasma apparatus used in the present invention;
wherein, 1, fabric; 2. a moisture regain preprocessing device; 3. a double-medium barrier sub-glow discharge atmospheric pressure plasma device; 31. a working electrode; 32. an insulating material; 33. a working power supply; 34. an air supply mechanism; 4. a drying device; 5-1, a first desizing liquid soaking and rolling tank; 5-7, a seventh desizing liquid soaking and rolling tank; 5-8, an eighth desizing liquid soaking and rolling tank; 6. a steaming device; 7. a hot water washing device; 8. a cold water washing device; 9-1, conveying rollers.
Detailed Description
At present, a method for treating a fabric by using plasma exists in a fabric desizing method in the prior art, but continuous production cannot be realized, however, if a plasma treatment device and a desizing treatment process are directly connected through a guide roller, and then the fabric after plasma treatment is directly fed into the desizing liquid for desizing treatment, and continuous processing production is realized, the desizing rate is not ideal, and practical requirements are difficult to meet. Through a large amount of research, the following findings are obtained: the reason why the above phenomenon occurs is that both the plasma treatment and the desizing treatment need treatment as long as possible to improve the desizing effect, but hydrophilic groups formed after the plasma treatment are unstable and gradually decrease in effect with the lapse of time, that is, continuous production requires the same speed of the moving fabric in the processes of the plasma treatment and the desizing treatment, so that the desizing effect is difficult to meet; based on this finding, if the moisture regain of the fabric 1 before the plasma treatment and the moving speed of the fabric 1 are effectively controlled, and the environmental conditions for the movement of the fabric 1 between the plasma treatment and the desizing treatment are controlled (keeping dry, preferably at 30 to 75 ℃, can greatly delay the attenuation of active particles such as free radicals generated in the plasma treatment), so that the plasma can modify the surface of the fabric more thoroughly to enhance the stability of hydrophilic groups, and further prolong the time for maintaining high wettability of the fabric 1 in the desizing treatment, the problem of undesirable desizing rate can be expected to be solved.
Based on the technical problems found above, the present invention provides a fabric desizing method, comprising the steps of: the method comprises the following steps of sequentially carrying out plasma treatment, drying treatment and desizing treatment in the process of conveying a fabric 1 to be treated on a conveying mechanism; wherein the moisture regain of the fabric 1 is controlled to be 3-8% before the plasma treatment, the moving speed of the fabric 1 on the conveying mechanism is 50-70m/min, and the moisture regain of the fabric 1 after the plasma treatment is controlled to be 2-7% in the drying treatment.
According to the present invention, the conveying mechanism, for example, may be a conveying mechanism formed by a plurality of sets of conveying rollers 9-1, such that the fabric 1 moves on the conveying rollers 9-1, and then the conveying movement of the fabric 1 can be realized by the cooperation of the unwinding mechanism and the winding mechanism.
According to the invention, as shown in figure 1, a fabric 1 can be firstly subjected to moisture regain control before plasma treatment by a moisture regain pretreatment device 2, then subjected to plasma treatment by a double-medium blocking sub-glow discharge atmospheric pressure plasma device 3, then subjected to boiling treatment and padding treatment (which can be realized by a roller) by a drying device 4, and finally subjected to steaming treatment (steaming time is preferably 25-40min), hot water washing treatment (temperature is 60-90 ℃), cold water washing treatment (temperature is 15-30 ℃), respectively, by a steaming device 6, a hot water washing device 7 (preferably a plurality of) and a cold water washing device 8 in sequence, wherein the steaming treatment (steaming time is preferably 25-40min), the cold water washing treatment (temperature is 60-90 ℃), the desizing treatment of the fabric 1 can be completed.
According to the invention, the plasma treatment is carried out by a double-medium barrier sub-glow discharge atmospheric pressure plasma device 3, wherein the working gas is one or more of air, argon, helium, nitrogen and oxygen, the flow rate of the working gas is 1-10L/min, the power supply power is 8-12kw, the input voltage is 10000-50000V, and the current is 3-20A.
As shown in fig. 2, the dual-dielectric barrier sub-glow discharge atmospheric pressure plasma device 3 includes at least one set of working electrodes 31 arranged in parallel, an insulating material 32 coated on each of the working electrodes 31, a gas supply mechanism 34 for supplying gas between the working electrodes 31, and a working power supply 33 connected to the working electrodes 31, and a channel for the fabric 1 to pass through is formed between each set of the working electrodes 31.
More preferably, the device 3 has at least 30 sets of working electrodes 31 arranged in relatively parallel.
Further preferably, the height of the gap between the fabric 1 and the working electrode 31 is 0.5-3 mm.
According to the present invention, the dual-dielectric barrier sub-glow discharge atmospheric pressure plasma device 3 may further include a gap adjusting mechanism (not shown) for adjusting the height of the gap between the fabric 1 and the working electrode 31, for example, the gap may be adjusted by driving the working electrode 31 to displace by a cylinder.
According to the invention, the sub-glow discharge plasma generated by the plasma device can carry out efficient and uniform physical and chemical modification on the serous membrane on the surface of the fabric 1, and the physical modification can damage the serous membrane surface and loosen the structure; a large number of polar groups are introduced on the surface of the serous membrane through chemical modification, so that the wettability of the serous membrane is obviously improved, and the serous membrane is easy to absorb desizing liquid.
The above-described scheme is further illustrated below with reference to specific examples; it is to be understood that these embodiments are provided to illustrate the general principles, essential features and advantages of the present invention, and the present invention is not limited in scope by the following embodiments; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions in routine experiments. In the following examples, all starting materials are either commercially available or prepared by conventional methods in the art, unless otherwise specified. Caustic soda is purchased from Rongqing chemical Co., Ltd, Cangzhou city, and refining agent is purchased from Fei Jian chemical Co., Ltd, Zhejiang province.
Example 1
The embodiment provides a desizing method of a fabric (the fabric 1 is specifically an all-cotton grey fabric, and the specification is that the all-cotton grey fabric is a 20 x 16 x 128 x 60 yarn card), which specifically comprises the following steps:
1) controlling the moisture regain of the all-cotton grey cloth to be treated to be 7%;
2) starting a conveying mechanism, controlling the moving speed of the all-cotton grey cloth to be 55 +/-2 m/min, and sequentially carrying out plasma treatment, drying treatment and desizing treatment on the all-cotton grey cloth treated in the step 1);
the method specifically comprises the following steps: the plasma treatment is carried out through a double-medium barrier sub-glow discharge atmospheric pressure plasma device 3, the double-medium barrier sub-glow discharge atmospheric pressure plasma device 3 comprises 36 groups of working electrodes 31 which are arranged in parallel relatively, an insulating material 32 which is coated on each working electrode 31, an air supply mechanism 34 which is used for supplying air between the working electrodes 31, and a working power supply 33 which is connected with the working electrodes 31, and a channel for the all-cotton grey cloth to pass through is formed between each group of the working electrodes 31; the flow rate of working gas in the device is 8 +/-1L/min, the power supply power is 9kw, the input voltage is 20000V, the current is 8A, and the height of a gap between the all-cotton grey cloth and the working electrode is 2.5 mm;
drying the all-cotton grey cloth subjected to the plasma treatment at 35 +/-2 ℃, and controlling the moisture regain of the all-cotton grey cloth to be 6%;
desizing the dried all-cotton gray cloth, sequentially boiling and padding the dried all-cotton gray cloth in 8 desizing liquid padding grooves, steaming, washing with hot water (at the temperature of 70 +/-2 ℃) and washing with cold water (at the temperature of 20 +/-2 ℃), controlling the different ginning rates of the all-cotton gray cloth after padding treatment in each desizing liquid padding groove, wherein the desizing liquid temperature is 65 +/-5 ℃, the liquid carrying rates of a first desizing liquid padding groove to a seventh desizing liquid padding groove are respectively 80 +/-2%, 74 +/-2%, 79 +/-2%, 75 +/-2%, 78 +/-2%, 76 +/-2% and 77 +/-2%, the liquid carrying rate of an eighth desizing liquid padding groove is controlled to be 90 +/-2%, the steaming temperature is 98 +/-2 ℃, and the steaming time is 30 +/-2 min; desizing fluid comprises: 18g/L of caustic soda and 2g/L of refining agent, namely finishing desizing treatment on the all-cotton gray cloth.
Comparative examples 1 to 1
Basically, the only difference is that there is no drying process between the plasma treatment and the desizing treatment as in example 1.
Comparative examples 1 to 2
Basically, the method is the same as example 1 except that the moving speed of the all-cotton gray fabric is controlled to 80 + -1 m/min.
Comparative examples 1 to 3
Essentially the same as example 1, except that there is only a desizing step.
Performance testing
The treated all-cotton greige goods of example 1, comparative examples 1-2 and comparative examples 1-3 were subjected to the following performance tests, see in particular table 1.
TABLE 1
Example 2
The embodiment provides a desizing method of a fabric (the fabric 1 is specifically polyester-cotton blended grey fabric, and the polyester-cotton blended fabric is 65T/35c, 42/2 × 21 × 124 × 69), which specifically comprises the following steps:
1) controlling the moisture regain of the polyester-cotton blended gray fabric to be treated to be 8%;
2) starting a conveying mechanism, controlling the moving speed of the polyester-cotton blended gray fabric to be 60 +/-2 m/min, and sequentially carrying out plasma treatment, drying treatment and desizing treatment on the polyester-cotton blended gray fabric treated in the step 1);
the method specifically comprises the following steps: the plasma treatment is carried out by a double-medium barrier sub-glow discharge atmospheric pressure plasma device, the double-medium barrier sub-glow discharge atmospheric pressure plasma device 3 comprises 36 groups of working electrodes 31 which are arranged in parallel relatively, an insulating material 32 which is coated on each working electrode 31, an air supply mechanism 34 which is used for supplying air between the working electrodes 31, and a working power supply 33 which is connected with the working electrodes 31, and a channel for the polyester-cotton blended gray fabric to pass through is formed between each group of the working electrodes 31; the flow rate of working gas in the device is 8 +/-1L/min, the power supply power is 10kw, the input voltage is 15000V, the current is 5A, and the height of a gap between the polyester-cotton blended gray fabric and the working electrode is 1.5 mm;
drying the polyester-cotton blended gray fabric subjected to the plasma treatment at 50 +/-3 ℃, and controlling the moisture regain of the polyester-cotton blended gray fabric to be 5%;
desizing the polyester-cotton blended gray fabric subjected to drying treatment, sequentially performing boiling-off treatment and padding treatment on the polyester-cotton blended gray fabric subjected to drying treatment through 8 desizing liquid padding grooves, steaming, hot water washing (at the temperature of 75 +/-2 ℃) and cold water washing (at the temperature of 20 +/-2 ℃), controlling the ginning rates of the polyester-cotton blended gray fabric subjected to padding treatment in each desizing liquid padding groove to be different, wherein the desizing liquid temperature is 75 +/-5 ℃, the liquid carrying rates of the first to seventh desizing liquid padding grooves are respectively 80 +/-2%, 74 +/-2%, 79 +/-2%, 75 +/-2%, 78 +/-2%, 76 +/-2% and 77 +/-2%, the liquid carrying rate of the eighth desizing liquid padding groove is controlled to be 90 +/-2%, the steaming temperature is 97 +/-2 ℃, and the steaming time is 30 +/-2 min; desizing fluid comprises: and (3) 20g/L of caustic soda and 2g/L of refining agent, namely finishing desizing treatment on the polyester-cotton blended gray fabric.
Comparative example 2-1
Basically, the only difference is that there is no drying process between the plasma treatment and the desizing treatment as in example 2.
Comparative examples 2 to 2
Basically, the method is the same as the method in the embodiment 2, and the moving speed of the polyester-cotton blended grey cloth is controlled to be 80 +/-1 m/min.
Comparative examples 2 to 3
Essentially the same as example 2, except that there is only a desizing step.
Performance testing
The polyester-cotton blended gray fabric obtained after the treatment of example 2, comparative example 2-1, comparative example 2-2 and comparative example 2-3 was subjected to the following performance tests, see table 2 specifically.
TABLE 2
Example 3
The embodiment provides a desizing method of a fabric (the fabric 1 is specifically polyester-cotton blended grey fabric, and the polyester-cotton blended fabric is 65T/35c, 42/2 × 21 × 124 × 69), which specifically comprises the following steps:
1) controlling the moisture regain of the polyester-cotton blended gray fabric to be treated to be 7%;
2) starting a conveying mechanism, controlling the moving speed of the polyester-cotton blended gray fabric to be 65 +/-2 m/min, and sequentially carrying out plasma treatment, drying treatment and desizing treatment on the polyester-cotton blended gray fabric treated in the step 1);
the method specifically comprises the following steps: the plasma treatment is carried out by a double-medium barrier sub-glow discharge atmospheric pressure plasma device, the double-medium barrier sub-glow discharge atmospheric pressure plasma device 3 comprises 36 groups of working electrodes 31 which are arranged in parallel relatively, an insulating material 32 which is coated on each working electrode 31, an air supply mechanism 34 which is used for supplying air between the working electrodes 31, and a working power supply 33 which is connected with the working electrodes 31, and a channel for the polyester-cotton blended gray fabric to pass through is formed between each group of the working electrodes 31; the flow rate of working gas in the device is 8 +/-1L/min, the power supply power is 10kw, the input voltage is 30000V, the current is 10A, and the height of a gap between the polyester-cotton blended gray fabric and the working electrode is 2 mm;
drying the polyester-cotton blended gray fabric subjected to the plasma treatment at 65 +/-2 ℃, and controlling the moisture regain of the polyester-cotton blended gray fabric to be 3%;
desizing the polyester-cotton blended gray fabric subjected to drying treatment, sequentially performing boiling-off treatment and padding treatment on the polyester-cotton blended gray fabric subjected to drying treatment through 8 desizing liquid padding grooves, steaming, hot water washing (at the temperature of 80 +/-2 ℃) and cold water washing (at the temperature of 20 +/-2 ℃), controlling the ginning rates of the polyester-cotton blended gray fabric subjected to padding treatment in each desizing liquid padding groove to be different, wherein the desizing liquid temperature is 75 +/-5 ℃, the liquid carrying rates of the first to seventh desizing liquid padding grooves are respectively 80 +/-2%, 74 +/-2%, 79 +/-2%, 75 +/-2%, 78 +/-2%, 76 +/-2% and 77 +/-2%, the liquid carrying rate of the eighth desizing liquid padding groove is controlled to be 90 +/-2%, the steaming temperature is 98 +/-2 ℃, and the steaming time is 35 +/-2 min; desizing fluid comprises: 22g/L of caustic soda and 3g/L of refining agent, namely finishing desizing treatment on the polyester-cotton blended gray fabric.
Comparative example 3-1
Basically, the only difference is that there is no drying process between the plasma treatment and the desizing treatment as in example 3.
Comparative examples 3 to 2
Basically, the method is the same as the method in the embodiment 3, and the moving speed of the polyester-cotton blended grey cloth is controlled to be 80 +/-1 m/min.
Comparative examples 3 to 3
Essentially the same as example 3, except that there is only a desizing step.
Performance testing
The polyester-cotton blended gray fabric obtained after the treatment of example 3, comparative example 3-1, comparative example 3-2 and comparative example 3-3 was subjected to the following performance tests, see table 3 for details.
TABLE 3
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (5)
1. A method of desizing a fabric, comprising the steps of: the method comprises the following steps of sequentially carrying out plasma treatment, drying treatment and desizing treatment in the process of conveying a fabric to be treated on a conveying mechanism; wherein the moisture regain of the fabric is controlled to be 3-8% before the plasma treatment, the speed of the fabric moving on the conveying mechanism is 50-70m/min, the moisture regain of the fabric treated by the plasma is controlled to be 2-7% in the drying treatment, the moisture regain of the fabric treated by the plasma is smaller than the moisture regain of the fabric treated by the plasma before the plasma treatment, and the drying treatment is carried out at a temperature of 30-75 ℃;
the plasma treatment is carried out by a double-medium blocking sub-glow discharge atmospheric pressure plasma device, wherein the working gas is one or more of air, argon, helium, nitrogen and oxygen, the flow rate of the working gas is 1-10L/min, the power supply power is 8-12kw, the input voltage is 10000-50000V, and the current is 3-20A; the double-dielectric-barrier sub-glow discharge atmospheric pressure plasma device comprises at least 30 groups of working electrodes which are arranged in parallel relatively, insulating materials which are coated on the working electrodes, an air supply mechanism which is used for supplying air between the working electrodes, and a working power supply which is connected with the working electrodes, wherein a channel for the fabric to pass through is formed between the working electrodes of each group, and the height of a gap between the fabric and the working electrodes is 0.5-3 mm.
2. The method of desizing a fabric according to claim 1, wherein the moisture regain of said fabric is controlled to be 4-8% before said plasma treatment.
3. The method of desizing a fabric according to claim 1, wherein the moisture regain of said plasma treated fabric is controlled to be 3-6% in said drying process.
4. A method for desizing a fabric according to claim 1, wherein the temperature of the desizing liquid in the desizing treatment is 60-100 ℃.
5. The method for desizing fabric according to claim 1, characterized in that said desizing treatment is in particular: sequentially carrying out boiling-off treatment and padding treatment on the dried fabric through a plurality of desizing liquid padding grooves, steaming and washing; and controlling the rolling residual rate of the fabric subjected to padding treatment in each desizing liquid padding groove to be different.
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