CN109778376B - Dyeing sizing process of tencel/Coolmax fiber elastic core-spun yarn - Google Patents
Dyeing sizing process of tencel/Coolmax fiber elastic core-spun yarn Download PDFInfo
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- CN109778376B CN109778376B CN201811610240.8A CN201811610240A CN109778376B CN 109778376 B CN109778376 B CN 109778376B CN 201811610240 A CN201811610240 A CN 201811610240A CN 109778376 B CN109778376 B CN 109778376B
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Abstract
The invention discloses a dyeing sizing process of tencel/Coolmax fiber elastic core-spun yarn, which comprises the following steps: step S1 warping, step S2 beam dyeing pretreatment, step S3 beam dyeing, step S4 soaping fixation and step S5 foam slashing. The process related by the invention effectively solves the quality problems of warping kinking, dyeing shaft explosion, color difference, inconsistent elasticity of inner and outer layers and the like by adjusting parameters of blank yarn warping, dyeing pretreatment and dyeing process, and realizes the warp beam dyeing of the elastic core-spun yarn. Before the dyeing pretreatment process, the circulation mode of the previous pretreatment full positive pump is changed, the warp beam is placed into a dye vat and is soaked in water, and then the warp beam is circulated by starting a reverse pump, so that the problem of warp beam dyeing explosion is solved. After warping, a layer of low permeability coefficient material is coated on the outer side of the warp beam to solve the problem of inconsistent color patterns, inner and outer layers and elasticity. And compared with the slashing which is dyed and then warped, the hairiness and neps of the yarn can be reduced.
Description
Technical Field
The invention relates to the technical field of yarn slashing, in particular to a dyeing slashing process of tencel/Coolmax fiber elastic core-spun yarn.
Background
The yarn dyeing mode mainly comprises three modes of hank yarn dyeing, cheese dyeing and warp beam dyeing. Compared with other two dyeing modes, the warp beam dyeing is to wind the yarns on the warp beam, directly dye the warp beam and then size the yarns, so that the process flow is greatly shortened, and the purposes of reducing energy consumption and improving production efficiency are achieved. The method has the outstanding characteristics that when the high-difficulty yarn-dyed variety is produced, the color difference streaks and the defects of uneven dyeing are greatly reduced, and the method has an obvious effect on improving the product quality. At present, the dyeing of the stretch yarn is mainly carried out on cheese dyeing, but the color difference of the inner layer and the outer layer of the stretch yarn dyed in a cheese dyeing mode is serious, stripes are easy to appear, the dyeing is particularly obvious on full-color cloth, and the cloth cover quality is seriously influenced. However, the elastic core-spun yarn has a uniaxial weight of less than 20Kg, a cotton yarn count of greater than or equal to 50/1 and some non-pure cotton yarns, when a sizing process of a warp beam dyeing process is performed, two or more yarns are easily twisted together, so that warp adhesion and twisting phenomena are easily generated in the weaving process of the manufactured yarns, warp breakage weaving defects are generated, the cloth cover style of the fabric is affected, cloth cover defects are generated, some cloth cover holes are generated, and cloth degradation and other problems of inferior fabrics are caused by serious people. The warp beam dyeing sizing process of the tencel/Coolmax fiber elastic covering yarn is not reported.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a dyeing sizing process of a tencel/Coolmax fiber elastic core spun yarn.
In order to solve the technical problem, the invention aims to realize that:
the invention relates to a dyeing sizing process of tencel/Coolmax fiber elastic core-spun yarn, which comprises the following steps:
step S1, warping: the elastic core-spun yarn is warped by adopting an elastic yarn warping machine of Karmeier DSE21NC or DSE50/21N, a warp beam on the elastic yarn warping machine is driven by a direct current motor controlled by a silicon controlled rectifier connected in parallel, and an unwinding bobbin creel is driven by a PIV type stepless speed change mechanism through a vertical shaft; the unwinding bobbin creel is provided with a tension sensor for detecting the tension of the elastic core-spun yarn; during warping, the tension rod of the bobbin creel of the elastic warping machine is adjusted to a position close to the bobbin so as to change a yarn passing route and shorten the closing time of a tension sheet to 0.2-0.4 s; the elastic warping machine is also provided with a yarn tension compensation device, so that the tension of the elastic core-spun yarn is changed along with the reduction of the diameter of a yarn bobbin in the warping process;
the coating layer of the selected elastic core-spun yarn is a tencel/Coolmax mixed fiber layer, and the core yarn is spandex or T400; placing the elastic core-spun yarn for 36-48 hours under the same temperature and humidity condition, wherein the humidity is 65%; the warping speed is 300-400m/min, and the axial pressure is 0.3-0.5 mPa; the yarn density of the warp beam is 0.3-0.4g/cm3And gradually decreases from the inside to the outside; coating a layer of low permeability coefficient on the outer side of the warp beam after warpingMaterial, the position of the end fixing ring of the warp beam is 20-30% of the height of the fabric package;
step S2, beam dyeing pretreatment: putting the warp beam into a dye vat of a warp beam dyeing machine, and adding water at 45 ℃ until the bath ratio is 1: 8-10min, running for 8-15min, adding 1-2g/L scouring agent, 4-8g/L caustic soda, 6-10g/L hydrogen peroxide, running for 5-10min, adding 2-5g/L chelating dispersant and 3-5g/L penetrating agent, heating to 55-60 ℃ at the rate of 0.7-1 ℃/min, running at constant temperature for 40-60min, discharging the liquid, washing with clear water at the temperature of 60-65 ℃ for 10-15min, pickling with acetic acid solution with the pH value of 5.5-6 at 45-50 ℃ for 8-10min, discharging the acetic acid solution, and washing with clear water at normal temperature for 10-20 min;
step S3, beam dyeing: adding water into the pretreated beam until the bath is 1: 10-15, adding 1-2g/L leveling agent, 2-3g/L defoaming agent AF and 3-5g/L penetrant JFC according to the proportion of 1-2g/L at the temperature of 40 ℃, adjusting the pH value to 4.5-5 by using acetic acid, and running for 10-15 min; adding a dyeing guide agent NP and 0.2-0.5% o.w.f Maxion type dye according to the proportion of 2-3g/L, operating for 5-10min, adding 0.3-0.6% o.w.f Nylosan type dye according to the proportion of 0.3-0.7% o.w.f, heating to 65-70 ℃ at the speed of 1-2 ℃/min, heating to 105 ℃ at the speed of 0.5-0.7 ℃/min, operating at constant temperature for 60-90min, cooling to 60-65 ℃ at the speed of 2-3 ℃/min, discharging liquid, and washing twice by using clean water at the temperature of 60-65 ℃; dyeing is carried out by alternating forward circulation and reverse circulation, wherein the forward circulation is carried out for 3min, and the reverse circulation is carried out for 5 min;
step S4, soaping and fixing color: and adding clear water into the dyed warp beam to achieve a bath ratio of 1: 6-10, adding hydrogen peroxide according to the proportion of 3-5g/L at normal temperature, operating for 8-15min, heating to 45-55 ℃, adding a soaping agent and an anion synthetic tannin fixing agent according to the proportion of 1-2g/L, heating to 90-100 ℃ according to the speed of 1-2 ℃/min, operating for 10-20min, and then washing and discharging liquid to obtain a dyed warp beam; placing the dyed warp beam in a pre-drying device, and drying at the temperature of 100-110 ℃ to control the water content of the warp yarn to be 30-35% so as to ensure the smooth proceeding of the subsequent foaming process;
step S5, foam sizing: placing the foaming slurry and the foaming agent in a foaming device, and adding clear water; wherein, the concentration of the foaming agent is 0.5-2%, the foaming ratio is 4: 1-6: 1, grouting force is 20-25 kN; the added foaming slurry comprises 20-30 parts by mass of phosphate starch slurry, 30-40 parts by mass of high-performance starch slurry, 2-5 parts by mass of wax flakes, 5-10 parts by mass of acrylic acid, 3-5 parts by mass of grease and 5-8 parts by mass of solid butylene; the unwinding tension is 400-800N, the winding tension is 1500-2000N, and the moisture regain is 5-8%.
As a further illustration of the above solution, the low permeability coefficient material used is made of polypropylene fibers.
As a further illustration of the above scheme, the blowing agent used was sodium lauryl sulfate.
The invention has the beneficial effects that: the dyeing sizing process of the tencel/Coolmax fiber elastic core-spun yarn related by the invention effectively solves the quality problems of warping kinking, dyeing shaft explosion, color difference, inconsistent elasticity of inner and outer layers and the like by adjusting parameters of blank yarn warping, dyeing pretreatment and dyeing process, and realizes warp beam dyeing of the elastic core-spun yarn. Specifically, the blank yarn warping solves the problem of kinking of elastic yarns in the warping process by adjusting a bobbin creel tension rod of the elastic yarn warping machine, changing the yarn passing path and shortening the closing reaction time of a tension sheet; before the dyeing pretreatment process, the circulation mode of the previous pretreatment full positive pump is changed, the warp beam is placed into a dye vat and is soaked in water, and then the warp beam is circulated by a reverse pump, so that the problem of warp beam dyeing shaft explosion is solved; the yarn density of the warp beam is 0.3-0.4g/cm before dyeing3And gradually decreases from the inside to the outside. After warping, a layer of low permeability coefficient material is coated on the outer side of the warp beam to solve the problem of inconsistent color patterns, inner and outer layers and elasticity. And compared with the slashing which is dyed and then warped, the hairiness and neps of the yarn can be reduced.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example one
The dyeing sizing process of the tencel/Coolmax fiber elastic covering yarn related by the embodiment comprises the following steps: step S1 warping, step S2 beam dyeing pretreatment, step S3 beam dyeing, step S4 soaping fixation and step S5 foam slashing.
In step S1, the elastic core-spun yarn is warped by using an elastic yarn warping machine of Karl Meyer DSE21NC or DSE50/21N, and the upper beam of the elastic yarn warping machine is driven by a direct current motor controlled by a silicon controlled rectifier connected in parallel.
The unwinding bobbin creel adopts a PIV type stepless speed change mechanism to transmit through a vertical shaft. The creel for bearing the elastic yarns consists of a plurality of independent creels, and the number of the creels can be increased or decreased according to the number of warping. The creels are fan-shaped towards the machine, so that the difference between yarn paths on the front creel and the rear creel is reduced as much as possible, and the uneven tension between single yarns is reduced. And the active let-off device is mainly composed of active let-off rollers on each bobbin creel. The active yarn feeding roller drives the elastic yarn bobbin contacted with the active yarn feeding roller through the rotation of the active yarn feeding roller, so that the unwinding speed of the surface of all the elastic yarn bobbins is consistent with the linear speed of the surface of the yarn feeding roller, the size of the yarn feeding amount can be changed by adjusting the rotation speed of the yarn feeding roller, and the yarn feeding roller is driven by a vertical shaft through a PIV type stepless speed change mechanism.
The unwinding creel is provided with a tension sensor for detecting the tension of the elastic core-spun yarn. During warping, the tension rod of the bobbin creel of the elastic warping machine is adjusted to be close to the bobbin so as to change the yarn passing route and shorten the closing time of the tension sheet to 0.2 s. The elastic warping machine is also provided with a yarn tension compensation device, so that the tension of the elastic core-spun yarn is changed along with the reduction of the diameter of the yarn bobbin in the warping process. As the bobbin diameter decreases during the warping process, the unwinding tension will also change and affect the elongation of the yarn. In order to ensure the stable tension, a tension sensor is used, the stretching is automatically and timely changed according to the extension difference of the elastic yarns on the yarn drum in the warping process, the tension compensation is carried out, and the extension difference of the elastic yarns on the pan head is reduced to the minimum degree. And an image type warping broken yarn detection system is arranged on the elastic yarn warping machine, an industrial camera is adopted to collect dynamic images of elastic yarn pieces during warping, a weighted average method is adopted to convert the elastic yarn images into gray images, the gray images are converted into simple binary images through a threshold segmentation algorithm, and then the number of the elastic yarns in the images is calculated. Compared with a common warping broken yarn detection system, the system adopts a non-contact detection method, can avoid the operation caused by the contact of the detection system on target yarns, and is convenient to maintain and timely and accurate in detection.
The sheath of the selected elastic core spun yarn was a layer of mixed tencel/Coolmax fiber and the core yarn was T400. The content of Coolmax fibers in the mixed fiber layer was 50%, the fineness of the mixed fiber layer was 21S, and the fineness of the core yarn used was 40D. The elastic core-spun yarn was left to stand under the same temperature and humidity conditions for 36 hours at a humidity of 65%. The warping speed was 300m/min and the axial pressure was 0.3 mPa. The yarn density of the warp beam is 0.3-0.4g/cm3And gradually decreases from the inside to the outside. In consideration of the physical properties and production characteristics of the elastic yarns, the elastic cheese on each batch of frames should be finished by warping once. The warping length of each beam must therefore be predetermined before the warping can be started, according to the economic features on the bobbins. First, randomly weighing 15 bobbins on a creel, and calculating the warping length by taking the bobbin with the lightest weight as a calculation standard.
Before the wire sheet is cut off by the pan head, the wire sheet is pressed by a wire pressing rubber roller, otherwise, the wire sheet retracts, and the pasted wire sheet is bound by a rope. And after warping, a layer of low permeability coefficient material is coated on the outer side of the warp beam, and the position of a tail end fixing ring of the warp beam is 20% of the package height of the fabric. The low permeability coefficient material used is made of polypropylene fibers. The covering position of the end fixing ring of the beam on the beam has important influence on the leveling property.
In the step S2 warp beam dyeing pretreatment, the warp beam is put into a dye vat of a warp beam dyeing machine, water is added under the condition of 45 ℃ until the bath ratio is 1: 8, running for 8min, adding 1g/L scouring agent, 4g/L caustic soda and 6g/L hydrogen peroxide, running for 5min, adding 2g/L chelating dispersant and 3g/L penetrant, heating to 55 ℃ at the speed of 0.7 ℃/min, running for 40min at constant temperature, discharging the liquid, washing with clear water at the temperature of 60 ℃ for 10min, washing with acetic acid solution with the pH value of 5.5 at the temperature of 45 ℃ for 8min, discharging the acetic acid solution, and washing with clear water at normal temperature for 10 min. The dyeing adopts positive and negative circulation alternation, wherein the positive circulation is 3min, and the negative circulation is 5 min.
In step S3 beam dyeing, the pretreated beam is added with water to a bath of 1: 10, adding 1g/L leveling agent, 2g/L defoaming agent AF and 3g/L penetrant JFC according to the proportion of 1g/L at the temperature of 40 ℃, adjusting the ph value to 4.5 by using acetic acid, and running for 10 min; then adding a dyeing guide agent NP according to the proportion of 2g/L, and 0.2% o.w.f of Maxion type dye, operating for 5min, then adding 0.3% o.w.f of Nylosan type dye, heating to 65 ℃ according to the speed of 1 ℃/min, then heating to 100 ℃ according to the speed of 0.5 ℃/min, operating for 60min at constant temperature, then cooling to 60 ℃ according to the speed of 2 ℃/min, discharging the liquid, and washing twice by using clean water at the temperature of 60 ℃. When the low-density warp beam is coated by the low-permeability material, the flow resistance of the low-density warp beam is obviously improved, the influence of the pressure difference of the inlet and the outlet of the dye vat on the liquid flow is also obviously reduced, and the dye liquor can permeate the fabrics more uniformly. Therefore, the outer layer of the low-density fabric is coated by using a low-permeability material such as polypropylene fiber, so that the leveling property of the material can be effectively improved.
In the step of S4 soaping and color fixing, the dyed beam is added with clear water to reach a bath ratio of 1: 6, adding hydrogen peroxide according to the proportion of 3g/L at normal temperature, operating for 8min, heating to 45 ℃, adding a soaping agent and an anion synthetic tannin fixing agent according to the proportion of 1g/L, heating to 90 ℃ according to the speed of 1 ℃/min, operating for 10min, and then washing and discharging liquid to obtain a dyed warp beam; and the dyed warp beam is placed in a pre-drying device and dried within the range of 100 ℃ to control the water content of the warp yarn at 30% so as to ensure the smooth proceeding of the subsequent foaming process.
In step S5, the foam slashing is to place the foaming slurry and the foaming agent in a foaming device and add clean water; wherein the foaming agent used is sodium lauryl sulfate. The concentration of the foaming agent is 0.5%, the foaming ratio is 4: 1, grouting force of 20 kN; the added foaming slurry comprises 20 parts by mass of phosphate starch slurry, 30 parts by mass of high-performance starch slurry, 2 parts by mass of wax flakes, 5 parts by mass of acrylic acid, 3 parts by mass of grease and 5-8 parts by mass of solid butylene; the unwinding tension was 400N, the winding tension was 1500N, and the moisture regain was 5%. And drying is performed during the winding process.
Example two
The dyeing sizing process of the tencel/Coolmax fiber elastic covering yarn related by the embodiment comprises the following steps: step S1 warping, step S2 beam dyeing pretreatment, step S3 beam dyeing, step S4 soaping fixation and step S5 foam slashing.
In step S1, the elastic core-spun yarn is warped by using an elastic yarn warping machine of Karl Meyer DSE21NC or DSE50/21N, and the upper beam of the elastic yarn warping machine is driven by a direct current motor controlled by a silicon controlled rectifier connected in parallel.
The unwinding bobbin creel adopts a PIV type stepless speed change mechanism to transmit through a vertical shaft. The unwinding creel is provided with a tension sensor for detecting the tension of the elastic core-spun yarn. During warping, the tension rod of the bobbin creel of the elastic warping machine is adjusted to be close to the bobbin so as to change the yarn passing route and shorten the closing time of the tension sheet to 0.4 s. The elastic warping machine is also provided with a yarn tension compensation device, so that the tension of the elastic core-spun yarn is changed along with the reduction of the diameter of the yarn bobbin in the warping process. And an image type warping broken yarn detection system is arranged on the elastic yarn warping machine.
The coating layer of the selected elastic core-spun yarn is a mixed fiber layer of tencel/Coolmax, and the core yarn is spandex. The content of Coolmax fibers in the mixed fiber layer was 65%, the fineness of the mixed fiber layer was 40S, and the fineness of spandex used was 70D. The elastic core-spun yarn was left to stand under the same temperature and humidity conditions for 48 hours at a humidity of 65%. The warping speed was 400m/min and the axial pressure was 0.5 mPa. The yarn density of the warp beam is 0.3-0.4g/cm3And gradually decreases from the inside to the outside.
And after warping, coating a layer of low-permeability coefficient material on the outer side of the warp beam, wherein the position of a tail end fixing ring of the warp beam is 30% of the package height of the fabric. The low permeability coefficient material used is made of polypropylene fibers.
In the step S2 warp beam dyeing pretreatment, the warp beam is put into a dye vat of a warp beam dyeing machine, water is added under the condition of 45 ℃ until the bath ratio is 1: 10, running for 15min, adding 2g/L scouring agent, 8g/L caustic soda and 10g/L hydrogen peroxide, running for 10min, adding 5g/L chelating dispersant and 5g/L penetrant, heating to 60 ℃ at the speed of 1 ℃/min, running for 60min at constant temperature, discharging liquid, washing for 15min by using clean water at the temperature of 65 ℃, pickling for 10min by using an acetic acid solution with the pH value of 6 at the temperature of 50 ℃, discharging the acetic acid solution, and washing for 20min by using clean water at normal temperature.
In step S3 beam dyeing, the pretreated beam is added with water to a bath of 1: 15, adding 2g/L leveling agent, 3g/L defoaming agent AF and 5g/L penetrant JFC according to the proportion of 2g/L at the temperature of 40 ℃, adjusting the ph value to be 5 by using acetic acid, and running for 15 min; adding a dye-guiding agent NP according to the proportion of 3g/L, operating 10min with 0.5% o.w.f Maxion type dye, adding 0.6% o.w.f Nylosan type dye, heating to 70 ℃ at the speed of 2 ℃/min, heating to 105 ℃ at the speed of 0.7 ℃/min, operating for 90min at constant temperature, cooling to 65 ℃ at the speed of 3 ℃/min, discharging the liquid, and washing twice with clean water at the temperature of 65 ℃; the dyeing adopts positive and negative circulation alternation, wherein the positive circulation is 3min, and the negative circulation is 5 min.
In the step of S4 soaping and color fixing, the dyed beam is added with clear water to reach a bath ratio of 1: 10, adding hydrogen peroxide according to the proportion of 5g/L at normal temperature, operating for 15min, heating to 55 ℃, adding a soaping agent and an anion synthetic tannin fixing agent according to the proportion of 2g/L, heating to 100 ℃ according to the speed of 2 ℃/min, operating for 20min, and then washing and discharging liquid to obtain a dyed warp beam; and placing the dyed warp beam in a pre-drying device, and drying at the temperature of 110 ℃ to control the water content of the warp yarn to be 35% so as to ensure the smooth operation of the subsequent foaming process.
In step S5, the foam slashing is to place the foaming slurry and the foaming agent in a foaming device and add clean water; wherein the foaming agent used is sodium lauryl sulfate. The concentration of the foaming agent is 2 percent, and the foaming ratio is 6: 1, grouting force 25 kN; the added foaming slurry comprises 30 parts by mass of phosphate starch slurry, 40 parts by mass of high-performance starch slurry, 5 parts by mass of wax flakes, 10 parts by mass of acrylic acid, 5 parts by mass of grease and 8 parts by mass of solid butylene; the unwinding tension was 800N, the winding tension was 2000N, and the moisture regain was 8%. And drying is performed during the winding process.
The first and second examples were compared with a warp beam prepared by a process of bobbin dyeing and then warping and sizing, and the yarn on the prepared warp beam was subjected to neps and hairiness tests as follows.
| Example one | Example two | Comparative example | |
| Hairiness | 224 | 283 | 405 |
| Cotton knots | 74 | 65 | 213 |
Wherein, the hairiness is more than 3mm hairiness of 10m yarn, and the neps are the number of neps of kilometer yarn.
As can be seen from the above table, the hairiness and neps on the yarns of the beams prepared in examples one and two are much smaller than those of the comparative example.
And the warp beams produced by the warp beams produced in the first embodiment and the second embodiment adopt the same weft yarns and the fabrics prepared by the same post-treatment process, and the color fastness is tested by adopting the corresponding test standards.
The fabric prepared by the warp beam in the proportion is subjected to color fastness test, and the test results are shown in the following table.
From the above table, it can be seen that the fabrics prepared by warping, dyeing and sizing are superior to the fabrics prepared by conventional cheese dyeing and warping, sizing and other processes in color fastness.
For the fabric prepared in the first example, the color difference Δ E of the fabric samples of the inner layer and the outer layer was measured. A Data-color measuring and matching system is adopted to take 5 points from each sample to calculate an average value under the conditions of large aperture and D65 light source, and the color difference delta E is measured. The woven swatches were sampled every 200m from the outside of the beam, the first sample being a1, in order a2, A3, a4, a5, a6, a 7. A7 is the innermost layer, A1 is the outermost layer, and the color difference Delta E is measured at the middle position of the sample by computer color measurement and color matching instrument respectively by taking the middle layer A4 as a standard. The test results are shown in the following table.
| A1 | A2 | A3 | A5 | A6 | A7 | |
| ΔE | 0.41 | 0.29 | 0.15 | 0.09 | 0.28 | 0.40 |
And the cloth sample prepared in the first embodiment is tested for left, middle and right color difference delta E. The swatches were sampled every 10cm from left to right across the width, the first sample being a1 followed by a2 to a 15. After the sample was taken, the color difference Δ E was measured by a computer color measuring and matching instrument using the intermediate sample a8 as a standard.
| Inner layer Delta E | Intermediate Delta E | Outer layer Δ E | |
| a1 | 0.42 | 0.43 | 0.45 |
| a2 | 0.32 | 0.30 | 0.33 |
| a3 | 0.29 | 0.23 | 0.20 |
| a4 | 0.18 | 0.13 | 0.11 |
| a5 | 0.14 | 0.11 | 0.10 |
| a6 | 0.08 | 0.11 | 0.12 |
| a7 | 0.06 | 0.08 | 0.10 |
| a9 | 0.15 | 0.16 | 0.14 |
| a10 | 0.17 | 0.16 | 0.17 |
| a11 | 0.14 | 0.12 | 0.16 |
| a12 | 0.18 | 0.19 | 0.15 |
| a13 | 0.21 | 0.23 | 0.24 |
| a14 | 0.38 | 0.35 | 0.36 |
| a15 | 0.44 | 0.43 | 0.46 |
As can be seen from the above two tables, the color difference Δ E is both small by 0.5, satisfying the requirements.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (3)
1. A dyeing sizing process of tencel/Coolmax fiber elastic core-spun yarn comprises the following steps:
step S1, warping: the elastic core-spun yarn is warped by adopting an elastic yarn warping machine of Karmeier DSE21NC or DSE50/21N, a warp beam on the elastic yarn warping machine is driven by a direct current motor controlled by a silicon controlled rectifier connected in parallel, and an unwinding bobbin creel is driven by a PIV type stepless speed change mechanism through a vertical shaft; the unwinding bobbin creel is provided with a tension sensor for detecting the tension of the elastic core-spun yarn; during warping, the tension rod of the bobbin creel of the elastic yarn warping machine is adjusted to a position close to the bobbin so as to change the yarn passing route and shorten the closing time of a tension sheet to 0.2-0.4 s; the elastic yarn warping machine is also provided with a yarn tension compensation device, so that the tension of the elastic core-spun yarn is changed along with the reduction of the diameter of a yarn bobbin in the warping process;
the coating layer of the selected elastic core-spun yarn is a tencel/Coolmax mixed fiber layer, and the core yarn is spandex or T400; placing the elastic core-spun yarn at the same temperature and humidity for 36-48 hours, wherein the humidity is 65%; the warping speed is 300-400m/min, and the axial pressure is 0.3-0.5 mPa; the yarn density of the warp beam is 0.3-0.4g/cm3And gradually decreases from the inside to the outside; coating a layer of low permeability coefficient material on the outer side of the warp beam after warping, wherein the position of a tail end fixing ring of the warp beam is 20-30% of the package height of the fabric;
step S2, beam dyeing pretreatment: putting the warp beam into a dye vat of a warp beam dyeing machine, and adding water at 45 ℃ until the bath ratio is 1: 8-10min, running for 8-15min, adding 1-2g/L scouring agent, 4-8g/L caustic soda, 6-10g/L hydrogen peroxide, running for 5-10min, adding 2-5g/L chelating dispersant and 3-5g/L penetrating agent, heating to 55-60 ℃ at the rate of 0.7-1 ℃/min, running at constant temperature for 40-60min, discharging the liquid, washing with clear water at the temperature of 60-65 ℃ for 10-15min, pickling with acetic acid solution with the pH value of 5.5-6 at 45-50 ℃ for 8-10min, discharging the acetic acid solution, and washing with clear water at normal temperature for 10-20 min;
step S3, beam dyeing: adding water into the pretreated beam until the bath ratio is 1: 10-15, adding 1-2g/L leveling agent, 2-3g/L defoaming agent AF and 3-5g/L penetrant JFC at 40 ℃, adjusting the pH value to 4.5-5 by using acetic acid, and running for 10-15 min; adding a dyeing guide agent NP and 0.2-0.5% o.w.f Maxion type dye according to the proportion of 2-3g/L, operating for 5-10min, adding 0.3-0.6% o.w.f Nylosan type dye according to the proportion of 0.3-0.7% o.w.f, heating to 65-70 ℃ at the speed of 1-2 ℃/min, heating to 105 ℃ at the speed of 0.5-0.7 ℃/min, operating at constant temperature for 60-90min, cooling to 60-65 ℃ at the speed of 2-3 ℃/min, discharging liquid, and washing twice by using clean water at the temperature of 60-65 ℃; dyeing is carried out by alternating forward circulation and reverse circulation, wherein the forward circulation is carried out for 3min, and the reverse circulation is carried out for 5 min;
step S4, soaping and fixing color: and adding clear water into the dyed warp beam to achieve a bath ratio of 1: 6-10, adding hydrogen peroxide according to the proportion of 3-5g/L at normal temperature, operating for 8-15min, heating to 45-55 ℃, adding a soaping agent and an anion synthetic tannin fixing agent according to the proportion of 1-2g/L, heating to 90-100 ℃ according to the speed of 1-2 ℃/min, operating for 10-20min, and then washing and discharging liquid to obtain a dyed warp beam; placing the dyed warp beam in a pre-drying device, and drying at the temperature of 100-110 ℃ to control the water content of the warp yarn to be 30-35% so as to ensure the smooth proceeding of the subsequent foaming process;
step S5, foam sizing: placing the foaming slurry and the foaming agent in a foaming device, and adding clear water; wherein, the concentration of the foaming agent is 0.5-2%, the foaming ratio is 4: 1-6: 1, grouting force is 20-25 kN; the added foaming slurry comprises 20-30 parts by mass of phosphate starch slurry, 30-40 parts by mass of high-performance starch slurry, 2-5 parts by mass of wax flakes, 5-10 parts by mass of acrylic acid, 3-5 parts by mass of grease and 5-8 parts by mass of solid butylene; the unwinding tension is 400-800N, the winding tension is 1500-2000N, and the moisture regain is 5-8%.
2. The process for dyeing and sizing tencel/Coolmax fiber elastic core spun yarn of claim 1, wherein the low permeability coefficient material used is polypropylene fiber.
3. The process for dyeing slashing of a tencel/Coolmax fiber elastic core spun yarn according to claim 1, wherein the foaming agent used is sodium lauryl sulfate.
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