High-color-fastness small-bath-ratio airflow dyeing and finishing method

Abstract

The invention relates to the field of dyeing and finishing of polyester-cotton knitwear, and discloses a high-color-fastness small-bath-ratio airflow dyeing and finishing method, which omits four procedures of oil removal in a cylinder before polyester dyeing, dehydration after polyester dyeing reduction, scutching, and reduction after middle setting, and adopts oil removal, water washing and pre-setting as continuous one-time operation, so that the production time is saved, and the production cost is reduced; after the gray fabric is pre-shaped, polyester molecules are arranged more regularly and compactly, disperse dye coloring is more stable, cylinder difference is more stable, the cylinder difference repair rate is reduced, the finished product shaping temperature is effectively reduced, the color fastness of a finished product is effectively controlled, and the requirement for color matching of ready-made clothes is met.

Description

Technical Field

[0001] The invention relates to the field of dyeing and finishing of polyester-cotton knitwear, in particular to an airflow dyeing and finishing method with high color fastness and small bath ratio. Background Art

[0002] The polyester-covered cotton knitted fabric is dyed and processed according to the samples, which is mostly used in the production of school uniforms and sportswear. Because the clothes are matched, the color fastness of soap-washed nylon such as black, dark navy blue, and wine red is required to be above level 4. If the conventional color fastness disperse dyes and conventional dyeing and finishing processes are used, the color fastness is generally only 3-3.5. If high-fastness dyes are used, the dye cost will increase by 1-2 times, exceeding the normal quotation. The polyester-covered cotton knitted fabric has a tight texture and the width shrinks severely under high-temperature dyeing and washing conditions, which is very easy to wrinkle. In order to improve color fastness and prevent wrinkles, the traditional method of the dyeing factory adopts a process of first degreasing with a large bath ratio, then dyeing and washing, and then fixing. After dyeing and washing reduction, this process requires dehydration, opening, fixing, secondary reduction and cleaning, then dyeing, and then fixing. This not only makes the process cumbersome, but also makes the color fastness of soap-washed nylon extremely poor due to the poor sublimation fastness of disperse dyes after fixation. If the reduction process is not implemented properly, such as the temperature, heating speed, insulation time, amount of reducing additives, etc., it is also very easy to cause poor color fastness, color depth, and reduction tank difference, such as patent document CN216610332U. At present, domestic polyester-covered cotton orders with high color fastness requirements mainly use the following two traditional dyeing and finishing schemes: Option 1: Dye with high color fastness dyes and then fix once.

[0003] 1. Production process:

[0004] Step 1: Degreasing, dyeing and reduction of high color fastness disperse dyes in a large bath ratio J-type tank.

[0005] Step 2: Dyeing cotton with air flow dyeing machine.

[0006] Step 3: Finished product is shaped at 160-165℃.

[0007] 2. The total time required for the whole process per ton of cloth is as follows: the dyeing and washing process first takes 90 minutes for degreasing and washing, 180 minutes for dyeing and washing, 30 minutes for reduction and cleaning after dyeing, and 300 minutes for cotton dyeing, for a total of 600 minutes.

[0008] 3. This solution has a simple process and a short time, but the dye cost is relatively high. Due to the large molecular structure of this type of dye, the coloring stability is worse than that of conventional disperse dyes. At the same time, in order to prevent the cloth from wrinkling, it must be dyed and washed in a large bath ratio dyeing machine, which consumes a lot of water and steam. Since there is no intermediate setting process, the finished product setting temperature is low and wrinkles on the cloth are prone to occur. The color fastness of nylon washed with soap at 160°C barely reaches level 4 or above. However, if there are creases on the semi-finished cloth before setting, the setting temperature must exceed 165°C, and the color fastness of nylon will drop significantly, failing to meet the high color fastness order requirements.

[0009] Option 2: The currently more commonly used process uses conventional color fastness disperse dyes.

[0010] Production process:

[0011] Step 1: Degreasing, disperse dyeing and washing, and reduction in a J-type tank with a large bath ratio.

[0012] The second step: dehydration, opening, and centering.

[0013] The third step: fix at 190℃. At this time, the disperse dye has poor color fastness due to fixation, so it needs to be restored in a large bath ratio dyeing machine at 90℃ / 20 minutes, and then dyed in an air flow dyeing machine.

[0014] The total time taken for the entire process per ton of cloth is as follows: the dyeing and washing stages first require 90 minutes of degreasing and washing, 180 minutes of dyeing and washing, 30 minutes of reduction and cleaning after dyeing, 50 minutes of dehydration, 60 minutes of opening, 120 minutes of setting, 40 minutes of reduction after setting, and 300 minutes of cotton dyeing, for a total of 870 minutes.

[0015] This solution has the disadvantages of complicated procedures and long time consumption. In addition, the polyester-covered cotton grey fabric is compact and prone to wrinkles. It must also be dyed in a high bath ratio dyeing machine. The high bath ratio degreasing, dyeing and reduction leads to high water, electricity and steam costs. Moreover, the sublimation fastness of the dye deteriorates after the fixation, and the subsequent reduction will lead to cylinder difference. Summary of the invention

[0016] In view of the problems of long dyeing process flow, high energy consumption and high dye cost in the prior art, the purpose of the present invention is to provide a high color fastness small bath ratio airflow dyeing and finishing method, which can continuously produce degreasing, water washing and pre-forming in one time, reduce the generation of lateral indentation, greatly improve production efficiency, and at the same time control the degreasing agent and washing water amount according to the meter weight of the grey cloth to achieve energy saving and environmental protection, use small bath ratio airflow dyeing, reduce the volume of the grey cloth, and save water, electricity and gas costs.

[0017] The technical solution provided by the present invention is a high color fastness polyester-cotton knitted small bath ratio airflow energy-saving dyeing and finishing method, the specific steps are: 1. A high color fastness small bath ratio air flow dyeing and finishing method, characterized in that it comprises the following steps: 1) After the grey cloth is degreased and washed, it enters the setting machine for presetting. The degreasing and presetting are continuous operations, and the presetting temperature is 190-195°C; 2) placing the pre-shaped grey fabric into an air flow dyeing machine for air flow dyeing, with the air flow dyeing to polyester bath ratio being 1:4 and the air flow cotton to polyester bath ratio being 1:4; 3) Soaping the dyed grey cloth; 4) Fixing and dehydrating the soap-washed grey cloth; 5) The grey cloth after color fixing and dehydration is shaped into a finished product to obtain the product.

[0018] The invention reduces the generation of transverse indentations by combining degreasing, washing and pre-setting in a continuous one-time production process, and omits the four processes of degreasing in the cylinder before dyeing and washing, dehydration after dyeing and washing reduction, opening, and resetting after centering, thereby saving more than 200 minutes of time cost and 10-20% of the overall cost. At the same time, only conventional color fastness disperse dyes can be used to obtain a smoother cloth surface in the same process time, saving overall cost; before dyeing and washing, the grey cloth is pre-set to make the polyester molecules more regularly and closely arranged, the disperse dye coloring more stable, the cylinder difference more stable, and the cylinder difference return repair rate reduced. The setting temperature of the finished product is effectively reduced, the color fastness of the finished product is effectively controlled, and the color matching requirements of the ready-made garment are met.

[0019] Furthermore, in step 1), 0.5-1% of the weight of the grey cloth is added with non-ionic penetrant DS-1230 and 0.5-1% of the weight of the grey cloth is added with degreasing agent DS-1130; the degreasing temperature is 80-95°C.

[0020] Preferably, the reducing agent is accurately weighed and the temperature is accurately controlled so as to stably control the cylinder difference and color fastness.

[0021] Furthermore, the parameters of the water washing equipment are: water intake volume 80-100 L / min; vehicle speed 22-25 m / min.

[0022] Furthermore, the parameters of the setting machine in step 1) are: temperature of 190-195° C.; overfeed of 20-25%; fan speed of 1300-1500 r / min; and the vehicle speed is the same as that of the washing equipment.

[0023] Preferably, the grey cloth is degreased and washed in a six-tank open-width washing machine at one time, wherein the first and second tanks are degreasing units, and the third to sixth tanks are washing units. 0.5-1wt% of DS-1130 degreaser and 0.5-1wt% of DS-1230 non-ionic penetrant are continuously added to the second tank and water is automatically replenished. The first tank is a step-by-step recycling, and the water intake is automatically controlled to prevent overflow in the first tank, wherein the temperature of the first tank is 80-85°C, and the temperature of the second tank is 90-95°C; in the washing unit, water enters the sixth tank, and is recycled in a step-by-step manner to the fifth tank, the fourth tank to the third tank until it overflows.

[0024] Furthermore, in step 2), DS-1230 non-ionic penetrant is added before dyeing and washing, and the amount of DS-1230 non-ionic penetrant added is 1-2wt%.

[0025] Furthermore, in step 2), dyeing and washing specifically include dyeing, cooling, and reduction cleaning; the dyeing temperature is 135-137°C, and the dyeing time is 40-50min; the cooling rate is 1-1.2°C / min, cooling to 85-87°C; the reduction temperature is 90-92°C, and the reduction time is 20-25min; the reducing agent is 2-2.5wt% of liquid alkali and 2-3wt% of insurance powder.

[0026] Preferably, during air flow dyeing, 1 to 2 wt% of DS-1230 nonionic penetrant is added to increase the permeability of the polyester fiber whose molecular gaps have become smaller after pre-setting, which is beneficial for the adsorption of disperse dyes from the dye solution to the fiber, thereby increasing the dye diffusion rate, increasing the dye air flow dyeing migration rate, and reducing dye hydrolysis.

[0027] Preferably, after dyeing is completed, the temperature is lowered to 85° C., and then a reagent is added for reduction cleaning.

[0028] Furthermore, in step 4), pickling is performed before soaping; the pickling agent is 0.5-0.6% glacial acetic acid, and the pickling time is 15-18 minutes.

[0029] Furthermore, in step 4), the pH of soap washing is 6 to 6.5; the time of soap washing is 20 to 23 minutes; and the temperature of soap washing is 85 to 90°C.

[0030] Furthermore, the soaping agents are M-260 soaping agent and LS-RT polyester soaping agent.

[0031] Furthermore, it is characterized in that, in step 5), the parameters of the shaping equipment are: temperature 130-135°C; vehicle speed 20-25m / min; overfeed 20-25%; fan speed 1300-1500r / min.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. Through process adjustment, compared with the mid-setting process, four processes, namely, degreasing in the cylinder before dyeing and washing, dehydration after dyeing and washing reduction, width opening, and reduction after mid-setting, are omitted. Degreasing, washing and pre-setting are performed as a continuous one-time operation, which saves more than 200 minutes of production time per ton of cloth and saves 10-20% of the comprehensive cost.

[0034] 2. The grey cloth flat-width degreasing and washing process replaces the degreasing and washing before dyeing and washing in the large bath ratio dyeing vat to remove polyester oligomers and oil stains and prevent color marks during dyeing and washing. At the same time, the width is pre-shrunk significantly to ensure the stability of the width and gram weight during pre-forming. The flat-width degreasing and pre-forming process ensures that the grey cloth surface style is close to the traditional pre-dyeing and washing process. Through process adjustment, conventional color fastness disperse dyes are used. The higher color fastness disperse dye process has lower dye costs, the same process time, and a smoother cloth surface is obtained, saving 10-20% of the overall cost.

[0035] 3. After the grey fabric is pre-shaped, the polyester molecules are arranged more regularly and tightly, the disperse dyeing is more stable, the cylinder difference is more stable, and the cylinder difference repair rate is reduced. The shaping temperature of the finished product is effectively reduced, the color fastness of the finished product is effectively controlled, and the requirements of the color matching of the finished garment are met.

[0036] 4. By controlling the soaping temperature of reactive dyeing and adding two soaping agents, it can not only meet the soaping requirements of reactive dye floating color, but also effectively prevent the soaping temperature from being too high and the heat transfer fastness of disperse dyes from decreasing. DETAILED DESCRIPTION

[0037] The present invention is further described in detail by way of examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples. The agents and raw materials used in the present invention can be purchased from the market, wherein DS-1230 nonionic penetrant is purchased from Demei Chemical, and LS-RT polyester soaping agent is purchased from Shanghai Langsi. All materials are calculated by percentage of grey fabric mass (OWF).

[0038] Example 1

[0039] A high color fastness and small bath ratio air flow dyeing and finishing method for preparing 190G wine red polyester-covered cotton knitted mesh fabric comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0040] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0041] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0042] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0043] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0044] (2) Airflow dyeing: First, add 1.5wt% of DS-1230 nonionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0045] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0046] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0047] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0048] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0049] Comparative Example 1

[0050] The difference between this comparative example and Example 1 is that this example does not perform pre-setting before dyeing and washing, and the remaining steps are the same as those of Example 1. The specific steps are as follows: A method for preparing a 190G wine red polyester-covered cotton knitted mesh fabric comprises the following steps: (1) Pretreatment The grey cloth is degreased and washed in a six-trough open-width washing machine to obtain the grey cloth to be dyed and washed.

[0051] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0052] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0053] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0054] (2) Airflow dyeing First, add 1.5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid, and keep the temperature for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0055] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0056] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0057] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0058] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0059] Comparative Example 2

[0060] The difference between this comparative example and the embodiment is that, in this comparative example, the pre-forming temperature is 100° C., and the rest of the process is the same as that of embodiment 1, and the specific steps are as follows: A method for preparing 190G wine red polyester-covered cotton knitted mesh cloth comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0061] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0062] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0063] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0064] Specifically, the parameters of the setting machine are: temperature 100°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0065] (2) Airflow dyeing: First, add 1.5wt% of DS-1230 nonionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0066] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0067] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0068] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0069] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0070] Comparative Example 3

[0071] The difference between this comparative example and Example 1 is that in step (1), the pre-forming temperature is 250° C., and the rest of the process is the same as that of Example 1. The specific steps are as follows: A method for preparing 190G wine red polyester-covered cotton knitted mesh cloth comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0072] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0073] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0074] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0075] Specifically, the parameters of the setting machine are: temperature 250°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0076] (2) Airflow dyeing: First, add 1.5wt% of DS-1230 nonionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0077] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0078] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0079] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0080] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0081] Table 1 Effect of pre-setting temperature on fabric properties Pre-order type Color fastness to soaping Light fastness Cylinder difference Example 1 Yes / 190℃ 4-5 4-5 4-5 Comparative Example 1 no 3-4 3-4 3-4 Comparative Example 2 Yes / 100℃ 3-4 3-4 3-4 Comparative Example 3 Yes / 250℃ 4-5 4-5 4 From the data in Table 2, we can conclude that if the grey fabric is degreased and washed without pre-setting, the color fastness and light fastness of the final fabric will decrease, and the cylinder difference will increase; when the pre-setting temperature is too high or too low, the color fastness and light fastness of the final fabric will decrease, and the cylinder difference will increase. The reason is speculated to be: pre-setting the grey fabric after degreasing and washing the flat width makes the polyester molecules more regular and compact, makes the disperse dye coloring more stable, the cylinder difference more stable, and reduces the cylinder difference repair rate. Effectively reduce the setting temperature of the finished product, effectively control the color fastness of the finished product, and meet the requirements of garment color matching.

[0082] Comparative Example 4

[0083] The difference between this comparative example and Example 1 is that in step (2), DS-1230 nonionic penetrant is not added into the airflow dyeing machine, and the remaining steps are the same as those in Example 1. The specific steps are as follows: A method for preparing 190G wine red polyester-covered cotton knitted mesh cloth comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0084] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0085] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0086] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0087] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0088] (2) Airflow dyeing: First, add 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid, and keep the temperature for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0089] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0090] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0091] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0092] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0093] Comparative Example 5

[0094] The difference between this comparative example and Example 1 is that in step (2), 0.5% of DS-1230 nonionic penetrant is added into the air flow dyeing machine, and the remaining steps are the same as those in Example 1. Specifically, the steps are as follows: A method for preparing 190G wine red polyester-covered cotton knitted mesh cloth comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0095] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0096] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0097] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0098] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0099] (2) Airflow dyeing: First, add 0.5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0100] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0101] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0102] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0103] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0104] Comparative Example 6

[0105] The difference between this comparative example and Example 1 is that in step (2), 5% of DS-1230 nonionic penetrant is added into the air flow dyeing machine, and the remaining steps are the same as those in Example 1. The specific steps are as follows: A method for preparing 190G wine red polyester-covered cotton knitted mesh cloth comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0106] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0107] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0108] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0109] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0110] (2) Airflow dyeing: First, add 5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0111] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0112] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0113] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0114] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0115] Table 2 Effect of DS-1230 non-ionic penetrant on fabric properties It can be concluded from the data in Table 2 that in step (2), adding 1-2% DS-nonionic penetrant in the airflow dyeing machine greatly improves the final fabric in terms of soap staining fastness, light fastness and color fastness. The reason is presumably that the addition of 1-2% DS-nonionic penetrant increases the permeability of the polyester fiber, which originally has molecular gaps after pre-setting, and is conducive to the adsorption of disperse dyes from the dye solution to the fiber, thereby increasing the diffusion rate of the fuel, increasing the fuel airflow dyeing migration rate, reducing dye hydrolysis, and realizing small bath ratio airflow dyeing.

[0116] Comparative Example 7

[0117] The difference between this comparative example and Example 1 is that the dyeing time in step (2) is 15 min, and the remaining steps are the same as those in Example 1. The specific steps are: A high color fastness and small bath ratio air flow dyeing and finishing method for preparing 190G wine red polyester-covered cotton knitted mesh fabric comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0118] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0119] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0120] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0121] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0122] (2) Airflow dyeing First, add 1.5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep warm at 135℃ for 15min; after cooling to 85℃, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep warm at 90℃ for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid, and keep warm for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0123] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0124] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0125] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0126] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The color-fixed rough cloth obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0127] Comparative Example 8

[0128] The difference between this comparative example and Example 1 is that the dyeing time in step (2) is 60 minutes, and the remaining steps are the same as those in Example 1. The specific steps are: A high color fastness and small bath ratio air flow dyeing and finishing method for preparing 190G wine red polyester-covered cotton knitted mesh fabric comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0129] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0130] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0131] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in turn before overflowing. The water intake is 80 L / min and the vehicle speed is 25 m / min.

[0132] Specifically, the parameters of the setting machine are: temperature 190°C, machine speed 25m / min, overfeed 21%, and fan speed 1300r / min.

[0133] (2) Airflow dyeing: First, add 1.5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 0.33wt% of disperse dye S-2G dispersed navy blue, 1.7wt% of H-5BL dispersed ruby ​​and 0.085wt% of ECO-4R dispersed orange, and keep the temperature at 135°C for 90min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 0.42wt% K-BF active blue, 1wt% HB active red, and 0.29wt% HB active yellow were added into the air flow dyeing machine, followed by 20wt% glauber salt, and the mixture was kept at 60°C for 30min; 10wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0134] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0135] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0136] (4) Color fixation 3 wt % of S4000 film and 3 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0137] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 50 seconds.

[0138] Table 3 Effect of dyeing time on fabric properties Dyeing time / min Color fastness to soaping Light fastness Cylinder difference Example 1 50 4-5 4-5 4-5 Comparative Example 7 15 3-4 3-4 3-4 Comparative Example 8 90 4-5 4-5 4-5 From the data in Table 3, we can conclude that when the dyeing time is too short (Comparative Example 7), the final fabric has a larger vat difference, and its color fastness to staining and light fastness decrease to varying degrees compared with Example 1. When the dyeing time is too long (Comparative Example 8), the vat difference, soaping color fastness and light fastness are not much different from the performance of the fabric produced with normal dyeing time.

[0139] Example 2

[0140] A high color fastness and small bath ratio air flow dyeing and finishing method for preparing 300G dark navy blue polyester-covered cotton knitted double-sided fabric comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0141] Specifically, the temperature of the first tank was set at 85° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0142] Specifically, the temperature of the second tank was set at 95° C., 1 wt % of DS-1130 degreasing agent and 0.8 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0143] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in sequence before overflowing. The water intake is 100 L / min and the vehicle speed is 25 m / min.

[0144] Specifically, the parameters of the setting machine are: temperature 193°C, machine speed 20m / min, overfeed 21%, and fan speed 1500r / min.

[0145] (2) Airflow dyeing: First, add 1.8wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 2.8wt% of disperse dye S-2G dispersed navy blue, 1.5% of BB dispersed dazzling blue and 0.045wt% of H-5BL dispersed ruby, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 1.2 wt% KN-B active black and 0.23 wt% HB active red were added into the air flow dyeing machine, followed by 22 wt% glauber salt, and the mixture was kept at 60°C for 30 min; 10 wt% soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30 min to obtain a dyed cloth sample.

[0146] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0147] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0148] (4) Color fixation 3 wt % of S400 film and 2 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 3 minutes to obtain the fixed grey cloth.

[0149] (5) Finalization The setting machine is operated at 130° C., a speed of 25 m / min, an overfeed of 20%, and a fan speed of 1300 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 40 seconds.

[0150] Example 3

[0151] A high color fastness and small bath ratio air flow dyeing and finishing method for preparing 270G black polyester-covered cotton knitted mesh fabric comprises the following steps: (1) Pretreatment After the grey cloth is degreased and washed in a six-trough open-width washing machine, it is then sent to a setting machine for high-temperature setting.

[0152] Specifically, the temperature of the first tank was set at 82° C., and the liquid in the second tank was recycled in a step-by-step manner.

[0153] Specifically, the temperature of the second tank was set at 92° C., 0.5 wt % of DS-1130 degreasing agent and 0.5 wt % of DS-1230 non-ionic penetrant were continuously added, and water was automatically added.

[0154] Specifically, water enters the sixth tank and is recycled to the fifth tank, the fourth tank, and the third tank in sequence before overflowing. The water intake is 90 L / min and the vehicle speed is 25 m / min.

[0155] Specifically, the parameters of the setting machine are: temperature 12°C, machine speed 25m / min, overfeed 21%, and fan speed 1400r / min.

[0156] (2) Airflow dyeing: First, add 1.5wt% of DS-1230 non-ionic penetrant, 0.5wt% of MF diffusant, 0.6wt% of sodium acetate and 0.5wt% of glacial acetic acid into the airflow dyeing machine, mix well, add 3wt% of disperse dyes ECT disperse black, 0.03wt% of H-5BL disperse ruby ​​and 0.2wt% of ECO-4R disperse orange, and keep the temperature at 135°C for 50min; after cooling to 85°C, add 3wt% of caustic soda and 3wt% of hydrosulfite into the dyeing machine, and keep the temperature at 90°C for 20min; wash with water for 15min, add 0.5wt% of glacial acetic acid and keep it for 10min; 4.6wt% of RXF active black, 0.1wt% of 3BS active red and 0.1wt% of HB active yellow were added into the air flow dyeing machine, followed by 36wt% of glauber salt, and the mixture was kept at 60°C for 30min; 13wt% of soda ash was added, the temperature was raised to 70°C and kept at this temperature for 30min to obtain a dyed cloth sample.

[0157] Specifically, the bath ratio of air flow dyeing is 1:4; the bath ratio of air flow dyeing cotton is 1:4.

[0158] (3) Soap washing The dyed fabric sample obtained in step (2) is washed with water for 30 minutes, then 0.5wt% of glacial acetic acid is added to react for 10 minutes, then 1wt% of M-260 soaping agent and 1wt% of LS-RT polyester soaping agent are added, and the mixture is kept warm at 90°C for 20 minutes, then washed with water for 20 minutes, and then washed with water at 60°C for 10 minutes. After changing the water once, the mixture is taken out of the vat to obtain the soaped fabric sample.

[0159] (4) Color fixation 3 wt % of S4000 film and 5 wt % of HF-8 color fixing agent were continuously added into the soft feeding machine for 2 minutes to obtain the fixed grey cloth.

[0160] (5) Finalization The setting machine is operated at 130° C., a speed of 22 m / min, an overfeed of 20%, and a fan speed of 1400 r / min. The fixed grey fabric obtained in step (4) is placed in the setting machine for setting for 60 s.

[0161] The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

[0162] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A high color fastness small bath ratio air flow dyeing and finishing method, characterized in that: The following steps are involved: 1) Continuously degrease, wash and pre-form the grey cloth in open width, and the pre-forming temperature is 190~195℃; 2) Air-dye the pre-shaped grey fabric, with the dyeing-to-polyester bath ratio being 1:4~5 and the dyeing-to-cotton bath ratio being 1:4~5; 3) Wash the dyed grey cloth with water and soap in turn; 4) Fix the color and dehydrate the soap washed grey cloth; 5) The grey cloth after color fixing and dehydration is shaped into a finished product to obtain the product.

2. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, characterized in that: In step 1), 0.5-1% of the weight of the grey fabric is added to the non-ionic penetrant DS-1230 and 0.5-1% of the weight of the grey fabric is added to the degreasing operation; The degreasing temperature is 80~95℃.

3. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, characterized in that: In step 1), the parameters of the water washing equipment are: Water inlet: 80~100L / min; water washing temperature: 30-50℃ The vehicle speed is 22~25m / min.

4. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, 2 or 3, characterized in that: The parameters of the setting machine used for pre-setting in step 1) are: Temperature is 190~195℃; Overfeed 20-25%; The fan speed is 1300~1500r / min; The vehicle speed is the same as that of the water washing equipment.

5. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, characterized in that: In step 2), add 1~2% DS-1230 non-ionic penetrant based on the weight of the grey fabric before dyeing and washing.

6. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1 or 5, characterized in that: In step 2), dyeing and washing specifically include dyeing, cooling, and reduction washing; The dyeing temperature is 135~137℃ and the dyeing time is 40~50min; The cooling rate is 1~1.2℃ / min, and the temperature drops to 85~87℃; The reduction temperature is 90~92℃, and the reduction time is 20~25min; The reducing agent is 2~2.5wt% of liquid alkali and 2~3wt% of hydrosulfite.

7. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, characterized in that: In step 4), acid washing is performed before soap washing; The pickling reagent is 0.5~0.6% glacial acetic acid, and the pickling time is 15~18 minutes.

8. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 1 or 7, characterized in that: In step 4), The pH of soap washing is 6 to 6.5; Soap washing time is 20-23 minutes; The soap washing temperature is 85~90℃.

9. A high color fastness small bath ratio air flow dyeing and finishing method according to claim 7, characterized in that: The soaping agent is one or both of M-260 soaping agent and LS-RT polyester soaping agent.

10. The high color fastness small bath ratio air flow dyeing and finishing method according to claim 1, characterized in that: In step 5), the parameters of the finished product shaping equipment are: Temperature 130~135℃; Vehicle speed: 20~25m / min; Overfeed 20-25%; The fan speed is 1300~1500r / min.

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