CN102877285B - Desizing method of fabric - Google Patents

Abstract

The invention provides a fabric desizing method, comprising the following steps: a) performing plasma treatment on the fabric to be treated; b) desizing the fabric obtained in the step a). In the present invention, before desizing the fabric to be treated, it is subjected to plasma treatment, and the high-energy particles in the plasma can etch the surface of the textile fabric, so that the continuous covering state of the size and wax on the fiber is oxidized and destroyed. The molecular chain of the slurry is cut off, and pores and cracks are formed on the surface of the serous film, which is conducive to the infiltration of the desizing working fluid; at the same time, the plasma introduces hydrophilic groups such as hydroxyl and carboxyl groups, which is beneficial to the dissolution of the serous film and the removal of impurities, thereby Improve the desizing rate of the fabric. Experimental results show that the desizing method provided by the invention can make the desizing rate of the fabric more than 85%, and the wool effect and mechanical properties of the obtained fabric are all improved.

Description

A kind of desizing method of fabric

technical field

The invention relates to the technical field of dyeing and finishing, in particular to a fabric desizing method.

Background technique

The desizing treatment of traditional textile printing and dyeing refers to the process of removing the size on the fabric and the impurities attached to the fabric fiber. The warp yarns of fabrics such as cotton, viscose and various synthetic fibers are mostly sizing before weaving. The size in the sizing process can affect the wettability of the fabric during the dyeing and finishing process and hinder the contact of chemicals to the fiber. Therefore, the fabric must be desized before dyeing and finishing. Commonly used desizing methods include: alkali desizing method, enzyme desizing method, oxidant desizing method and alkali-oxygen one-bath desizing method.

Alkali desizing method is suitable for starch or starch-based fabrics with low sizing rate and fabrics mixed with chemical sizing (such as polyacrylic sizing) and other sizing. The advantage of this process is that the cost is low, and the caustic soda can be used for scouring or mercerizing waste caustic soda without damaging the cotton fiber. However, the alkali desizing method has a poor desizing effect on PVA sizing, and it is easy to cause "coagulation" of PVA sizing to adhere to the fabric or cloth guide roller, forming hard-to-remove sizing spots, which are very easy to produce printing and dyeing Defects; In addition, the effect of alkali desizing on fabrics sized with starch is not as good as that of enzymatic desizing. However, the enzymatic desizing method is only applicable to fabrics sized with pure starch or starch-based, low-PVA-content sizing. If the PVA content in the mixed pulp is high or the fabric is mainly sized with PVA size, other desizing methods must be used. The oxidant desizing method is suitable for PVA and synthetic fiber blended and pure textiles that are mainly PVA mixed with other sizing, and can remove all sizing. The oxidants used for desizing generally include sodium bromite, H ₂ O ₂ , NaClO, persulfate, etc. At present, hydrogen peroxide and persulfate are mainly used. The feature of this process is rapid desizing and good effect. If desizing with hydrogen peroxide, there is also partial bleaching effect. Hydrogen peroxide desizing not only has a good desizing effect on various types of starch, but also has a good desizing effect on PVA size, but the disadvantages are high cost, poor process control and easy oxidation holes. If persulfate desizing is used, the cellulose fiber will be damaged, the strength of the fabric will be seriously reduced, and the desizing effect on PVA will be lacking.

Because the scope of application of the above-mentioned desizing method is relatively narrow and there are many shortcomings, the alkali-oxygen one-bath desizing method is currently the main method in industrial production. This is because the main advantages of this method are low cost and helpful The removal of cottonseed hulls and some fiber symbionts reduces the burden of scouring, and the whiteness and permeability of semi-finished products after treatment are good; and it is applicable to all kinds of pulp. However, there is a problem of low desizing rate in this method, which can only reach 50%-70%.

Contents of the invention

The object of the present invention is to provide a method for desizing fabrics. The method provided by the present invention enables the fabrics to have a higher desizing rate and improves the desizing quality of the fabrics.

The invention provides a kind of desizing method of fabric, comprises the following steps:

a) subjecting the fabric to be treated to plasma treatment;

b) Desizing the fabric obtained in step a).

Preferably, the frequency of the plasma in the step a) plasma treatment is 18000 Hz to 25000 Hz.

Preferably, the distance between the electrode and the fabric in step a) of the plasma treatment is 1 mm to 5 mm.

Preferably, the number of plasma treatments in step a) is 5 to 10 times.

Preferably, the number of times of plasma treatment in step a) is 5 to 10 times on the front and back sides of the fabric respectively.

Preferably, the number of discharge electrodes treated with plasma in step a) is 15-20.

Preferably, the speed of the fabric in the step a) plasma treatment is 25m/min-50m/min.

Preferably, the step b) is specifically:

b1) The fabric obtained in the step a) is sequentially subjected to the first hot water washing treatment, the room temperature water washing treatment and the first water rolling treatment;

b2) immersing the fabric obtained in the step b1) into the desizing working solution for desizing treatment;

b3) The fabric obtained in the step b2) is sequentially subjected to padding, steaming treatment, second hot water washing treatment and second water rolling treatment.

Preferably, the temperature of the first hot water washing treatment is 90°C to 96°C;

The temperature of the second hot water washing treatment is 93°C-95°C.

Preferably, the steaming temperature is 98°C to 100°C;

The steaming time is 25min~45min.

The invention provides a fabric desizing method, comprising the following steps: a) performing plasma treatment on the fabric to be treated; b) desizing the fabric obtained in the step a). In the present invention, before desizing the fabric to be treated, it is subjected to plasma treatment, and the high-energy particles in the plasma can etch the surface of the textile fabric, so that the continuous covering state of the size and wax on the fiber is oxidized and destroyed. The molecular chain of the slurry is cut off, and pores and cracks are formed on the surface of the slurry film, which is conducive to the penetration of caustic soda; at the same time, the plasma introduces hydrophilic groups such as hydroxyl and carboxyl groups, which promotes the decomposition of the slurry and improves the solubility of the slurry. Impurities are also easy to remove; plasma treatment can also chemically modify the fiber surface: ions and free radicals can be generated on the fiber surface to change the ratio of the crystalline region and the amorphous region on the fiber macromolecular surface, thereby changing the fiber surface Water absorption and permeability of surfaces. Therefore, the method provided by the invention improves the desizing rate of the fabric, and the wool effect and mechanical properties of the fabric are also improved. Experimental results show that the desizing method provided by the invention can make the desizing rate of the fabric reach more than 85%, which is about 20% higher than that of the traditional process, which ensures the quality of the fabric in the subsequent printing and dyeing, and improves the hand feeling of the fabric and improves the quality of the fabric. the physical level.

Detailed ways

The invention provides a kind of desizing method of fabric, comprises the following steps:

a) subjecting the fabric to be treated to plasma treatment;

b) Desizing the fabric obtained in step a).

The research of the present invention shows that the sizing material forms a size film on the surface of the fiber. During the desizing process of the traditional technology, it is difficult to remove the size film because the size film is relatively complete. Play a role, so that the desizing effect is poor. The invention provides a fabric desizing method. First, the fabric to be treated is subjected to plasma treatment, and then the obtained plasma-treated fabric is subjected to desizing treatment. During the plasma treatment process of the fabric, the plasma The high-energy particles in the medium will etch the surface of the fabric, oxidize and destroy the continuous covering state of the size and wax on the fiber, cut off the molecular chain of the size, and form pores and cracks on the surface of the size film, which is beneficial to the desizing work At the same time, the plasma introduces hydrophilic groups such as hydroxyl and carboxyl groups, and the desizing working solution quickly swells and decomposes the slurry, which improves the solubility of the slurry, and the wax containing more C-H bonds is also oxidized, making the C=O bond As the content increases, impurities are easy to be removed; plasma treatment can also chemically modify the surface of the fiber: it can generate ions and free radicals on the surface of the fiber, and change the ratio of the crystalline region and the amorphous region on the surface of the fiber macromolecules, thereby Change the water absorption and permeability of the fiber surface. Therefore, the fabric obtained by the method provided by the invention has a higher desizing rate, and also improves the wool effect and strength of the fabric.

In the invention, the fabric to be treated is first treated with plasma to obtain the plasma-treated fabric. In order to adapt to the needs of industrial production and further improve the quality of the fabric, the present invention preferably performs turning, stitching and singeing on the fabric to be treated before the plasma treatment. The method of the present invention has no special limitation to the method of cloth turning, seaming and singeing, and the technical solutions of cloth turning, seaming and singeing well known to those skilled in the art can be adopted. In the present invention, the process of turning over the fabric and seaming head is as follows: turn the fabric to be processed into the trolley according to the principle that the front and back are consistent, and then connect the obtained fabric according to the end-to-end connection;

After obtaining the fabric that has been turned over and seamed, the present invention performs singeing on the obtained fabric. The specific process is as follows: the obtained fabric is rubbed over a flame or a hot metal surface to burn off the fluff on the surface of the fabric. , to obtain the fabric after singeing treatment. The present invention has no special restrictions on the type and temperature of the flame or hot metal, and the flame or hot metal can be used in the singeing treatment well known to those skilled in the art.

After finishing the singeing treatment of the fabric, the present invention performs plasma treatment on the obtained fabric. The present invention has no special limitation on the way of generating plasma, and the way of generating plasma well-known to those skilled in the art can be adopted. In order to make the cloth surface treatment effect uniform, the present invention preferably removes the wrinkles of the cloth surface before the said fabric is subjected to plasma treatment. In the present invention, it is preferable to remove the wrinkles on the cloth surface by applying a spreader roll or a bending roll; in the present invention, the obtained fabric is preferably passed through a plasma device for plasma treatment. In the present invention, the plasma in the plasma treatment is the plasma obtained by exciting the air; the voltage of the exciting air is preferably 10000V~15000V; the frequency of the plasma in the plasma treatment is preferably 18000 Hz~25000V Hertz, more preferably 20,000 Hz to 22,000 Hz; the distance between the electrode that generates plasma and the fabric is preferably 1 mm to 5 mm, more preferably 1 mm to 3 mm; the discharge electrode that generates plasma in the plasma treatment is preferably 15 to 20, more preferably 16; the number of times of the plasma treatment is preferably 5 to 10, more preferably 6 to 9, most preferably 8; more preferably the front and back of the fabric The two sides are subjected to plasma treatment 5 to 10 times respectively, most preferably the fabric is subjected to plasma treatment 5 to 10 times in the manner of one front and one reverse; the time of the plasma treatment is preferably 0.4 seconds to 1 second;

The present invention can adopt plasma treatment machine to carry out plasma treatment to fabric, and its parameter setting is preferably: input voltage is preferably 380V ~ 400V; Input current is preferably 75A ~ 85A; Input power is preferably 28KW ~ 35KW; Vehicle speed is preferably 25m/ min~50m/min. In the present invention, in order to prevent the fabric from being punctured by high-voltage electricity to cause holes and defects on the fabric, the distance between the discharge electrode on the plasma processor and the insulating rubber is preferably 2 mm to 8 mm, more preferably 3 mm to 5 mm.

After the plasma treatment of the fabric to be treated is completed, the present invention performs desizing treatment on the obtained fabric to complete the desizing treatment of the fabric to be treated. In the present invention, the desizing treatment preferably includes the following steps:

b1) The fabric obtained in the step a) is sequentially subjected to the first hot water washing treatment, the room temperature water washing treatment and the first water rolling treatment;

b2) immersing the fabric obtained in step b2) into the desizing working solution;

b3) The fabric obtained in the step b2) is sequentially subjected to padding, steaming treatment, second hot water washing treatment and second water rolling treatment.

After the plasma treatment of the fabric is completed, the present invention preferably sequentially performs the first hot water washing treatment, room temperature water washing treatment and the first water rolling treatment on the obtained fabric, and the present invention treats the first hot water washing treatment, room temperature water washing treatment and the second water washing treatment. There is no special limitation on the method of the first water-squeezing treatment, and the technical solutions of the first hot water washing treatment, the room temperature water washing treatment and the first water-squeezing treatment well known to those skilled in the art can be used. In the present invention, the temperature of the hot water in the first hot water washing treatment is preferably 90°C to 96°C, more preferably 92°C to 94°C; Remove water to improve efficiency and save steam. In the present invention, after the water padding treatment, it is preferable to make the scraping rate of the obtained fabric be 60%~65%;

After the fabric is subjected to the first water squeeze treatment, the present invention enters the obtained fabric into the desizing working solution for desizing treatment. The present invention has no special restrictions on the composition of the desizing working solution. The well-known desizing working fluid can be used. The present invention can adopt the alkali desizing working fluid in the lye desizing method, or the biological enzyme desizing working fluid in the enzyme desizing method. In the present invention, if the desizing Slurry working liquid, which preferably includes the following components in mass concentration: caustic soda of 2g/L~12g/L and refining agent of 2g/L~3g/L; if biological enzyme desizing working liquid is used, it preferably includes the following mass concentration Components: 2g/L~5g/L desizing enzyme, more preferably 3g/L~4g/L; 1g/L~2g/L penetrant. The present invention has no special restrictions on the types of the desizing biological enzyme, penetrating agent and refining agent. The desizing biological enzyme and penetrating agent used in the enzymatic desizing method well known to those skilled in the art and the alkaline desizing method are adopted. For example, the desizing enzyme can use the wide temperature and high-efficiency desizing enzyme JN-160 produced by Zaozhuang Jienuo Bioenzyme Co., Ltd., and the penetrant can use the model CG provided by Liyan Chemical Co., Ltd. Penetrant and refining agent can use refining agent SA-23 provided by Suzhou Liansheng Chemical Co., Ltd.;

When the present invention adopts the alkali desizing working liquid, the concentration of caustic soda in it is relatively low, thereby reducing the pH value of the desizing wastewater, making its treatment simpler, reducing the treatment cost of the wastewater, and being beneficial to environmental protection; moreover, the present invention provides The method can be carried out at normal temperature and pressure, thereby avoiding the "oxidation hole" defect caused by metal impurities, and improving the mechanical properties of the fabric.

In the present invention, the fabric is taken out from the desizing working solution described in the above technical scheme, and it is sequentially subjected to material rolling, steaming treatment, second hot water washing treatment and second water rolling treatment. The method of steaming treatment, the second hot water washing treatment and the second water rolling treatment is not particularly limited, and the technical solutions of material rolling, steaming treatment, the second hot water washing treatment and the second water rolling treatment well known to those skilled in the art are adopted. Can. In the present invention, the obtained fabric is preferably passed through rolling material to make the excess rate of 100%~105%; in the present invention, the temperature of the steam in the steaming process is preferably 98°C~100°C; the steaming time It is preferably 25min~45min, more preferably 30min~40min; the temperature of the hot water used in the second hot water washing treatment is preferably 93°C~95°C; the scrapping rate of the second water rolling treatment is preferably 60%~ 65%;

In the present invention, after finishing the second water squeeze treatment on the obtained fabric, the obtained fabric is preferably dried to complete the desizing treatment on the fabric. The present invention has no special limitation on the drying method, and the drying technical solution well known to those skilled in the art can be adopted.

After the present invention completes the desizing treatment of the fabric, the desizing rate, gross effect and mechanical properties of the fabric obtained by detection, the desizing rate represents a basic technical index of the size removal degree on the fabric, which can be calculated by the following formula: desizing Rate=[(fabric size content before desizing-fabric size content after desizing)/fabric size content before desizing]×100%. In production, it is generally required that the desizing rate of the fabric is above 80%, or the desizing level is around 8, and the remaining residual size will be removed in the next refining process. The present invention has no special limitation on the detection method of the desizing rate, and the detection technical scheme of the desizing rate well-known to those skilled in the art can be adopted, such as the chemical quantitative determination method disclosed in the prior art or the "TEGEWA" rating method, The present invention adopts "TEGEWA" rating method to detect the desizing rate of the fabric, and the specific process is as follows:

Soak the tested fabric sample in N/200 iodine solution for 2 minutes, then rinse it in water for a short time, dry it with filter paper, and place it in a wet state for 5 minutes, then use the purple standard sample card to judge the rating. The purple evaluation sample card is divided into grades 1 to 9, wherein the desizing effect of grade 1 is the worst, and the desizing effect of grade 9 is the best. The relationship between the evaluation grade and quantitative determination of the fabric desizing rate is shown in Table 1, and Table 1 is the result of the present invention. The relationship between the evaluation level of the medium desizing rate and the quantitative measurement value:

The relationship between desizing rate evaluation level and quantitative determination value in table 1 the present invention

Capillary effect, that is, capillary effect, is also an important technical index for evaluating the desizing effect of fabrics. Generally, the capillary effect of cotton fabrics is required to be above 8cm. The measurement is to hang the desized sample cloth vertically and tightly on the bracket, and there is a water storage box filled with deionized water or pure water under the bracket. Before the measurement, first mark a marking line at the lower end of the cloth sample parallel to the water surface, then immerse the lower end of the cloth sample in deionized water or pure water so that the marking line coincides with the water surface, and wait for the deionized water or pure water within a specified time. After the water rises to a certain height along the capillary, make a horizontal marking line from the lowest position (water mark) where the water reaches on the cloth surface, and then use a ruler to measure the distance from the marking line at the lower end of the cloth sample to the marking line at the upper end of the cloth sample. The distance between them, measured in centimeters, is the gross value. The present invention has no special limitation on the above-mentioned time, and the time used when measuring the capillary effect well known to those skilled in the art can be used. The present invention preferably adopts the 30-minute method to measure the capillary effect of the fabric, that is, the liquid is measured within 30 minutes along the capillary. The height of the rise is expressed in cm, and the sample is 30×5cm to obtain the gross effect of the fabric;

Fabric strength is generally divided into breaking strength (or tensile strength) and tearing strength. There are many ways to measure it. In the existing technology, there are two methods to measure the breaking strength: the strip method and the grab sample method. The tearing strength includes the single-tongue method and the double-tongue method. Standard methods, such as AATCC, ASTM, ISO, etc. implementation. According to the national standard GB/T 3923.1 of the People's Republic of China "Textile Fabric Tensile Properties" Part 1: Determination of Breaking Strength and Elongation at Break, the present invention carries out the determination of the fabric strength of the fabric obtained by the present invention;

The result shows that the desizing rate of the fabric obtained by the method provided by the invention is more than 85%, about 25% higher than that of the traditional process, and the fabric obtained has higher gross effect and mechanical properties, which is beneficial to the carrying out of the subsequent printing and dyeing process, ensuring The quality of subsequent printing and dyeing is improved; and the hand feeling of the fabric is improved due to the removal of the size, which improves the physical level.

The invention provides a fabric desizing method, comprising the following steps: a) performing plasma treatment on the fabric to be treated; b) desizing the fabric obtained in the step a). In the present invention, before desizing the fabric to be treated, it is subjected to plasma treatment, and the high-energy particles in the plasma can etch the surface of the textile fabric, so that the continuous covering state of the size and wax on the fiber is oxidized and destroyed. The molecular chain of the slurry is cut off, pores and cracks are formed on the surface of the slurry film, which is conducive to the penetration of caustic soda; at the same time, the plasma introduces hydrophilic groups such as hydroxyl and carboxyl groups, and the caustic soda quickly swells and decomposes the slurry, improving the solubility of the slurry, containing C-H The wax with more bonds is also oxidized, which increases the content of C=O bonds, and the impurities are easy to be removed; plasma treatment can also chemically modify the surface of the fiber: it can generate ions and free radicals on the surface of the fiber, making the fiber larger The ratio of crystalline and amorphous regions of the molecular surface changes, thereby changing the water absorption and permeability of the fiber surface. Due to the above reasons, a lower dosage of NaOH can greatly improve the water absorption of cotton fabrics, which is conducive to the realization of cleaning and desizing of fabrics. Experimental results show that the desizing method provided by the invention makes the desizing rate of the fabric up to more than 85%, ensures the quality of the fabric in subsequent printing and dyeing, improves the hand feeling of the fabric, and improves the real level.

In order to further illustrate the present invention, the desizing method of the fabric provided by the present invention is described in detail below in conjunction with the examples, but they cannot be interpreted as limiting the protection scope of the present invention.

In the following examples, the plasma treatment machine is a textile fabric plasma treatment machine whose model is SZW-1800, the model of the combined descouring and bleaching machine is LMH022-200, and the refining agent SA-23 is purchased from Suzhou Liansheng Chemical Co., Ltd. Desizing enzyme JN-160 was purchased from Zaozhuang Jienuo Bioenzyme Co., Ltd., and penetrant CG was purchased from Liyan Chemical Co., Ltd.

Example 1

The all-cotton carding that specification is 8S * 8S 48 * 3263 " is turned over and seamed, then the all-cotton carding that obtains is placed in the singeing treatment machine and carries out singeing treatment, and the parameter of described singeing treatment is : Vehicle speed is 120±2m/min; 1 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

The present invention places the obtained cotton carded through the singeing treatment in a plasma treatment machine for plasma treatment, and the parameters of the plasma treatment machine are set as follows: the input voltage is 350V ~ 400V, the current is 75A ~ 85A, and the power is 25KW~30KW, the frequency is 20000 Hz~25000 Hz, the speed is 30±2/min;

In the present invention, the obtained plasma-treated cotton carded is placed in a combined descouring and bleaching machine of model LMH022-200 for alkali desizing treatment, the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler temperature It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash with hot water at 93±3°C, and cycle wash with hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 10g/L caustic soda and 1g/L refining agent SA-23, 1#~2#, 4# The pressure applied by ~7# roll is 0.24±0.02Mpa, the pressure of 3# roll is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, and the pressure of each washing tank and drying cylinder tension frame is 0.2±0.1Mpa, the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9±0.1m ³ / h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

In the present invention, the obtained cotton carded through the above-mentioned desizing treatment is subjected to an index test, and the results are shown in Table 2. Table 2 shows the test results obtained in Example 1 and Comparative Example 1 of the present invention.

Comparative example 1

The all-cotton carding that specification is 8S * 8S 48 * 3263 " is turned over and seamed, then the all-cotton carding that obtains is placed in the singeing treatment machine and carries out singeing treatment, and the parameter of described singeing treatment is : Vehicle speed is 120±2m/min; 1 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed cotton carded is placed in a combined descouring and bleaching machine of model LMH022-200 for alkali desizing treatment. It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash with hot water at 93±3°C, and cycle wash with hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 40g/L caustic soda and 2g/L refining agent SA-23, 1#~2#, 4# The pressure applied by ~7# roll is 0.24±0.02Mpa, the pressure of 3# roll is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, and the pressure of each washing tank and drying cylinder tension frame is 0.2±0.1Mpa, the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9±0.1m ³ / h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

In the present invention, the obtained cotton carded through the above-mentioned desizing treatment is subjected to an index test, and the results are shown in Table 2. Table 2 shows the test results obtained in Example 1 and Comparative Example 1 of the present invention.

Table 2 Test results obtained in Example 1 and Comparative Example 1 of the present invention.

As can be seen from Table 2, the desizing method provided by the present invention has a better desizing rate, which has increased by about 20% compared with traditional techniques, and the gross effect and breaking strength of the fabric obtained have also been improved; in addition, the present invention The alkali consumption of the method provided by the invention is reduced by about 70%, which is beneficial to realize clean desizing.

Example 2

The all-cotton carding that specification is 8S * 8S 48 * 3263 " is turned over and seamed, then the all-cotton carding that obtains is placed in the singeing treatment machine and carries out singeing treatment, and the parameter of described singeing treatment is : Vehicle speed is 120±2m/min; 1 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

The present invention places the obtained cotton carded through the singeing treatment in a plasma treatment machine for plasma treatment, and the parameters of the plasma treatment machine are set as follows: the input voltage is 350V ~ 400V, the current is 75A ~ 85A, and the power is 25KW~30KW, the frequency is 20000 Hz~25000 Hz, the speed is 30±2/min;

In the present invention, the obtained plasma-treated cotton carded is placed in a combined descouring and bleaching machine of model LMH022-200 for alkali desizing treatment, the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler temperature It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash with hot water at 93±3°C, and cycle wash with hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 12g/L caustic soda and 2g/L refining agent SA-23, 1#~2#, 4# The pressure applied by ~7# roll is 0.24±0.02Mpa, the pressure of 3# roll is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, and the pressure of each washing tank and drying cylinder tension frame is 0.2±0.1Mpa, the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9±0.1m ³ / h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

The results show that the method provided by the invention makes the fabric have a higher desizing rate, and the capillary effect and strength of the obtained fabric are also improved, which is beneficial to the subsequent process.

Comparative example 2

The all-cotton carding that specification is 8S * 8S 48 * 3263 " is turned over and seamed, then the all-cotton carding that obtains is placed in the singeing treatment machine and carries out singeing treatment, and the parameter of described singeing treatment is : Vehicle speed is 120±2m/min; 1 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2 ^# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed cotton carded is placed in a combined descouring and bleaching machine of model LMH022-200 for alkali desizing treatment. It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash with hot water at 93±3°C, and cycle wash with hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 42g/L caustic soda and 3g/L refining agent SA-23, 1#~2#, 4# The pressure applied by ~7# roll is 0.24±0.02Mpa, the pressure of 3# roll is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, and the pressure of each washing tank and drying cylinder tension frame is 0.2±0.1Mpa, the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9±0.1m ³ / h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

By comparing with the results of Example 2, the results show that the desizing rate of the fabric obtained by the method provided by the invention has increased by about 20%; and the method provided by the invention has reduced the amount of alkali by about 70%, realizing clean desizing .

Example 3

The full cotton carded with a specification of 21S×21S 108×5863″ is turned over and stitched, and then the obtained full cotton carded is placed in a singeing treatment machine for singeing treatment, and the parameters of the singeing treatment are set It is: vehicle speed is 125±2m/min; 1# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar. The singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

The present invention places the obtained cotton carded through the singeing treatment in a plasma treatment machine for plasma treatment, and the parameters of the plasma treatment machine are set as follows: the input voltage is 350V ~ 400V, the current is 75A ~ 85A; the power is 25KW~30KW; frequency is 20000 Hz~25000 Hz; vehicle speed is 35±2m/min;

In the present invention, the obtained plasma-treated cotton carded is placed in a combined descouring and bleaching machine for desizing treatment, and the conditions for desizing treatment are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 2g/L high-efficiency desizing enzyme JN-160 and 0.5g/L penetrant CG, 1#~ The pressure exerted by 2#, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the high-efficiency rolling car pressure is 3.5bar, the water discharge valve pressure is 0.4±0.1MPa, each washing tank and drying cylinder The pressure of the tension frame is 0.2±0.1Mpa, and the pressure of falling cloth and rolling is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9 ±0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of carded cotton is completed.

In the present invention, the obtained cotton carded through the above-mentioned desizing treatment is subjected to an index test, and the results are shown in Table 3. Table 3 shows the test results obtained in Example 3 and Comparative Example 3 of the present invention.

Comparative example 3

The full cotton carded with a specification of 21S×21S 108×5863″ is turned over and stitched, and then the obtained full cotton carded is placed in a singeing treatment machine for singeing treatment, and the parameters of the singeing treatment are set It is: vehicle speed is 125±2m/min; 1# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar. The singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

In the present invention, the whole cotton carded obtained through the singeing treatment is placed in the descaling and bleaching combined machine for desizing treatment, and the conditions of the desizing treatment are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler belt temperature It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 2g/L high-efficiency desizing enzyme JN-160 and 2g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

In the present invention, the obtained cotton carded through the above-mentioned desizing treatment is subjected to an index test, and the results are shown in Table 3. Table 3 shows the test results obtained in Example 3 and Comparative Example 3 of the present invention.

Table 3 The test result that embodiment 3 of the present invention and comparative example 3 obtain

As can be seen from Table 3, the desizing rate obtained by the method provided by the present invention is 85.55%, which is increased by about 27% compared with the traditional process, which shows that the method provided by the present invention can effectively improve the desizing rate.

Example 4

The full cotton carded with a specification of 21S×21S 108×5863″ is turned over and stitched, and then the obtained full cotton carded is placed in a singeing treatment machine for singeing treatment, and the parameters of the singeing treatment are set It is: vehicle speed is 125±2m/min; 1# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar. The singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

The present invention places the obtained cotton carded through the singeing treatment in a plasma treatment machine for plasma treatment, and the parameters of the plasma treatment machine are set as follows: the input voltage is 350V ~ 400V, the current is 75A ~ 85A; the power is 25KW~30KW; frequency is 20000 Hz~25000 Hz; vehicle speed is 35±2m/min;

In the present invention, the obtained plasma-treated cotton carded is placed in a combined descouring and bleaching machine for desizing treatment, and the conditions for desizing treatment are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 3g/L high-efficiency desizing enzyme JN-160 and 1g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

The present invention conducts a performance test on the obtained all-cotton carded that has undergone the above-mentioned desizing treatment, and the results show that the all-cotton carded obtained by the method provided by the present invention has a relatively high desizing rate.

Comparative example 4

The full cotton carded with a specification of 21S×21S 108×5863″ is turned over and stitched, and then the obtained full cotton carded is placed in a singeing treatment machine for singeing treatment, and the parameters of the singeing treatment are set It is: vehicle speed is 125±2m/min; 1# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar; 2# burner air pressure is 29±1mbar, natural gas pressure is 25±1mbar. The singeing method is through burning ( Two positive and two reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; 0.05Mpa, so that the singeing level of the fabric is 4 or above;

In the present invention, the whole cotton carded obtained through the singeing treatment is placed in the descaling and bleaching combined machine for desizing treatment, and the conditions of the desizing treatment are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler belt temperature It is 99±1℃. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 3g/L high-efficiency desizing enzyme JN-160 and 3g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the same level as the elbow, and the desizing treatment of the carded cotton is completed.

By comparing with the result of Example 4, the results show that the desizing rate of the fabric obtained by the method provided by the invention has increased by about 30%, and its mechanical properties have also been improved, which shows that the method provided by the invention carries out Desizing can improve the desizing rate and mechanical strength of the fabric, which is beneficial to the subsequent dyeing and finishing process and improving the dyeing and finishing level of the fabric.

Example 5

The polyester-cotton blended T65/C35 carded 21S×21S 108×5863″ is turned over and stitched, and then the obtained fabric is placed in a singeing machine for singeing treatment. The parameters of the singeing machine are set as follows: 135±2m/min; 1# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar; 2# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar. reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; tension frame pressure is 0.25±0.05Mpa , so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed fabric is placed in a plasma treatment machine for plasma treatment, and the parameters of the plasma machine are set as follows: the input voltage is 350V~400V, the current is 75A~85A; the power is 25KW~30KW; The frequency is 20000 Hz~25000 Hz; the speed is 35±2m/min;

In the present invention, the obtained plasma-treated fabric is placed in a combined descouring and bleaching machine for desizing treatment. The working parameters of the combined descouring and bleaching machine are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 2g/L high-efficiency desizing enzyme JN-160 and 0.5g/L penetrant CG, 1#~ The pressure exerted by 2#, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the high-efficiency rolling car pressure is 3.5bar, the water discharge valve pressure is 0.4±0.1MPa, each washing tank and drying cylinder The pressure of the tension frame is 0.2±0.1Mpa, and the pressure of falling cloth and rolling is 0.5±0.1Mpa; the flow rate of the water-filled rotameter in the No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the water-filled rotameter in the No. 8 tank is controlled at 0.9 ±0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the level of the elbow, and the desizing treatment of the fabric is completed.

In the present invention, the obtained fabrics subjected to the above-mentioned desizing treatment are tested for performance, and the results are shown in Table 4. Table 4 shows the test results obtained in Example 5 and Comparative Example 5 of the present invention.

Comparative Example 5

The polyester-cotton blended T65/C35 carded 21S×21S 108×5863″ is turned over and stitched, and then the obtained fabric is placed in a singeing machine for singeing treatment. The parameters of the singeing machine are set as follows: 135±2m/min; 1# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar; 2# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar. reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; tension frame pressure is 0.25±0.05Mpa , so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed fabric is placed in a combined descouring and bleaching machine for desizing treatment, and the working parameters of the combined descouring and bleaching machine are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the track The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 2g/L high-efficiency desizing enzyme JN-160 and 2g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the level of the elbow, and the desizing treatment of the fabric is completed.

In the present invention, the obtained fabrics subjected to the above-mentioned desizing treatment are tested for performance, and the results are shown in Table 4. Table 4 shows the test results obtained in Example 5 and Comparative Example 5 of the present invention.

The test result that table 4 embodiment 5 of the present invention and comparative example 5 obtain

As can be seen from Table 4, the desizing rate of the fabric obtained by the method provided by the invention is increased to 92.35%, which is about 23.6% higher than that of the traditional process, which shows that the fabric obtained by the method provided by the invention has a higher desizing rate Sizing rate, but also improve the mechanical properties of the fabric.

Example 6

The polyester-cotton blended T65/C35 carded 21S×21S 108×5863″ is turned over and stitched, and then the obtained fabric is placed in a singeing machine for singeing treatment. The parameters of the singeing machine are set as follows: 135±2m/min; 1# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar; 2# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar. reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; tension frame pressure is 0.25±0.05Mpa , so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed fabric is placed in a plasma treatment machine for plasma treatment, and the parameters of the plasma machine are set as follows: the input voltage is 350V~400V, the current is 75A~85A; the power is 25KW~30KW; The frequency is 20000 Hz~25000 Hz; the speed is 35±2m/min;

In the present invention, the obtained plasma-treated fabric is placed in a combined descouring and bleaching machine for desizing treatment. The working parameters of the combined descouring and bleaching machine are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the crawler The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 3g/L high-efficiency desizing enzyme JN-160 and 1g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the level of the elbow, and the desizing treatment of the fabric is completed.

The present invention conducts a performance test on the fabric obtained through the above-mentioned desizing treatment, and the result shows that the fabric obtained by the method provided by the present invention has a higher desizing rate.

Comparative Example 6

The polyester-cotton blended T65/C35 carded 21S×21S 108×5863″ is turned over and stitched, and then the obtained fabric is placed in a singeing machine for singeing treatment. The parameters of the singeing machine are set as follows: 135±2m/min; 1# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar; 2# burner air pressure: 29±1mbar, natural gas pressure: 25±1mbar. reverse); natural gas pressure is 0.11±0.01Mpa; dryer steam pressure is 0.10±0.05Mpa; fire extinguisher steam pressure is 0.02±0.01Mpa; rolling car pressure is 0.3±0.05Mpa; tension frame pressure is 0.25±0.05Mpa , so that the singeing level of the fabric is 4 or above;

In the present invention, the obtained singed fabric is placed in a combined descouring and bleaching machine for desizing treatment, and the working parameters of the combined descouring and bleaching machine are set as follows: the vehicle speed is 60±2m/min, the stacking time is 40min, and the track The temperature is 99±1°C. Use 93±3°C hot water circulating water in the 1st to 2nd compartment washing tank, 80±5 °C hot water circulation washing in the 3rd compartment washing tank, and use in the 4th to 7th compartment washing tank Wash in hot water at 93±3°C, and cycle wash in hot water at 80±5°C in the 8th grid washing tank. The temperature of the desizing working fluid in the trough is 80±5°C, and the desizing working fluid includes the following mass concentration components: 3g/L high-efficiency desizing enzyme JN-160 and 3g/L penetrant CG, 1#~2 The pressure exerted by #, 4#~7# rollers is 0.24±0.02Mpa, the pressure of 3# roller is 0.2±0.02Mpa, the pressure of high-efficiency rolling car is 3.5bar, the pressure of water discharge valve is 0.4±0.1MPa, each washing tank and drying cylinder The force frame pressure is 0.2±0.1Mpa, and the cloth falling and rolling pressure is 0.5±0.1Mpa; the flow rate of the rotameter in No. 2 tank is controlled at 0.6±0.1m ³ /h; the flow rate of the rotameter in No. 8 tank is controlled at 0.9± 0.1m ³ /h, the liquid level of the scale window of the steamer is kept at the level of the elbow, and the desizing treatment of the fabric is completed.

By comparing with the result of Example 6, the results show that the desizing rate of the fabric obtained by the method provided by the invention has increased by about 25%, and its mechanical properties have also been improved, which illustrates that the method provided by the invention carries out Desizing can improve the desizing rate and mechanical strength of the fabric, which is beneficial to the subsequent dyeing and finishing process and improving the dyeing and finishing level of the fabric.

It can be seen from the above examples that the present invention provides a fabric desizing method, comprising the following steps: a) performing plasma treatment on the fabric to be treated; b) performing desizing treatment on the fabric obtained in step a). In the present invention, before desizing the fabric to be treated, it is subjected to plasma treatment, and the high-energy particles in the plasma can etch the surface of the textile fabric, so that the continuous covering state of the size and wax on the fiber is oxidized and destroyed. The molecular chain of the slurry is cut off, pores and cracks are formed on the surface of the slurry film, which is conducive to the penetration of caustic soda; at the same time, the plasma introduces hydrophilic groups such as hydroxyl and carboxyl groups, and the caustic soda quickly swells and decomposes the slurry, improving the solubility of the slurry, containing C-H The wax with more bonds is also oxidized, which increases the content of C=O bonds, and the impurities are easy to be removed; plasma treatment can also chemically modify the surface of the fiber: it can generate ions and free radicals on the surface of the fiber, making the fiber larger The ratio of crystalline and amorphous regions of the molecular surface changes, thereby changing the water absorption and permeability of the fiber surface. Due to the above reasons, when the desizing working solution used contains caustic soda, the lower dosage of NaOH can greatly improve the water absorption of cotton fabrics, which is conducive to the realization of clean desizing of fabrics. Experimental results show that the desizing method provided by the invention makes the desizing rate of the fabric up to more than 85%, ensures the quality of the fabric in subsequent printing and dyeing, improves the hand feeling of the fabric, and improves the real level.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. a method for desizing fabric, comprising the following steps: a) The fabric to be treated is subjected to plasma treatment, the distance between the electrode and the fabric in the plasma treatment is 1 mm to 3 mm, the time of the plasma treatment is 0.4 s to 1 s, and the number of times of the plasma treatment is 5 to 10 times; b) Desizing the fabric obtained in step a). 2. The method according to claim 1, characterized in that the frequency of the plasma in the step a) plasma treatment is 18000 Hz-25000 Hz. 3. The method according to claim 1, characterized in that, the number of times of plasma treatment in the step a) is 5 to 10 times on the front and back of the fabric. 4. The method according to claim 1, characterized in that, the number of discharge electrodes treated with plasma in the step a) is 15-20. 5. The method according to claim 1, characterized in that the speed of the fabric in the step a) plasma treatment is 25m/min˜50m/min. 6. The method according to claim 1, characterized in that, said step b) is specifically: b1) sequentially performing the first hot water washing treatment, room temperature water washing treatment and the first water rolling treatment on the fabric obtained in the step a); b2) immersing the fabric obtained in the step b1) into the desizing working solution for desizing treatment; b3) The fabric obtained in the step b2) is sequentially subjected to rolling, steaming treatment, second hot water washing treatment and second water rolling treatment. 7. The method according to claim 6, characterized in that, the temperature of the first hot water washing treatment is 90°C-96°C; The temperature of the second hot water washing treatment is 93°C-95°C. 8. The method according to claim 7, characterized in that, the steaming temperature is 98°C to 100°C; The steaming time is 25min-45min.