Method for producing t400, spandex double core wrap yarn beam

Abstract

This invention belongs to the field of textile dyeing technology, specifically relating to a method for producing warp beams of T400, spandex elastic double-core spun yarn. The method includes the following steps: Raw yarn steaming: T400, spandex elastic double-core spun yarn (1-1.1 kg / piece) is placed in a steaming cylinder for steaming, and after steaming, the cylinder is opened and cooled to room temperature; the steamed yarn is then rewinded on a tight winding machine; Raw yarn warping: A warp beam is selected, and a sandwich-type composite material is wrapped around it. The warping machine parameters are adjusted, and warping is performed; Warp beam dyeing: The warp beam is placed on a vacuum dewatering machine for dehydration, and the moisture content of the warp beam after dehydration is 60-65%. The method for producing T400, spandex elastic double-core spun yarn warp beams provided by this invention shortens the production process, improves production efficiency, and produces core-spun yarn that maintains high elastic elongation and recovery rate, with uniform elasticity, color, and fastness of the inner and outer layers.

Description

Technical Field

[0001] This invention belongs to the field of textile dyeing technology, specifically relating to a method for producing warp beams of T400 and spandex elastic double-core spun yarn. Background Technology

[0002] Traditional elastic fabrics typically use ordinary cotton spandex core-spun yarn to give the fabric elasticity. However, as the wear time and number of washes increase, these fabrics may experience problems such as loss of elasticity, localized bulging, and pilling, affecting the fabric's shape and appearance. Currently, double-core yarn technology is being used in denim fabrics. However, when applied to yarn-dyed fabric production, it faces challenges such as elasticity loss due to dyeing and color differences between the inner and outer layers. If conventional beam dyeing is used, the elastic elongation of the dyed yarn is only 2%-5%, far below the elasticity requirements for warp yarns in yarn-dyed elastic fabrics (elongation not less than 15%). The reasons are as follows: First, the yarn experiences high tension when dyeing with cone yarns or beam yarns, especially beam dyeing. Second, T400 requires high-temperature, high-pressure dyeing with disperse dyes, which also damages elasticity. Third, double-core yarn uses composite filament T400 and spandex as the supporting and elastic cores respectively, with short fibers such as cotton and regenerated cellulose fibers as the outer sheath. It requires a two-bath dyeing process, which is lengthy and further exacerbates elasticity damage. Simultaneously, due to the high elasticity of the raw yarn, the yarn tightens significantly after warping or winding, resulting in insufficient flow during dyeing and leading to differences in color and fastness between the inner and outer layers.

[0003] To address issues of elasticity damage and color difference between inner and outer layers, dyeing is typically performed using a combination of bread yarn and spring tubes. However, this method suffers from low production efficiency, low dyeing machine load, and numerous defective yarns, resulting in significant waste. Furthermore, if cone yarn dyeing is used for the warp direction of yarn-dyed fabrics, the cone yarn must be dried, spun into individual cones, and then warped again, leading to a lengthy production process and a high risk of defects such as discolored warp yarns, impacting product quality. The challenge lies in ensuring both production efficiency and maintaining high elastic elongation and recovery rate in the dyed yarn, along with uniform elasticity, color, and fastness across the inner and outer layers. This is the key challenge in applying T400+spandex elastic double-core core-spun yarn to the warp direction of yarn-dyed fabrics.

[0004] CN105586687A discloses a cotton-wrapped spandex T400 double-core elastic fabric. First, spandex and polyester T400 filaments are drawn together and bundled to form the core yarn, pre-twisted at 120 twists / m. Then, using a spinneret method, a filament feeding device is added to a traditional ring spinning machine to maintain a certain distance between the filaments and the normally drawn sliver. The core yarn tension is controlled at 30cN, and the pre-draft ratio is 3 times, resulting in cotton-wrapped spandex T400 double-core elastic yarn. After yarn configuration, warping, dyeing, and sizing, it is woven. This fabric combines the various characteristics of cotton, spandex, and T400 fibers, leveraging their strengths and compensating for their weaknesses. It not only possesses the ultra-high elasticity and extensibility of spandex but also combines the excellent heat resistance, fatigue resistance, and oxidation resistance of polyester T400 fibers. After being wrapped with cotton fibers on the outermost layer, it also retains the feel and moisture absorption of cotton fibers. This fabric is a coarse-count yarn used for denim, with a coarse yarn count (16 count). The leather provides better coverage of the core material than conventional yarn counts. At the same time, denim fabric has lower requirements for the dyeing consistency between the leather and the core material. Therefore, a ring-type indigo dyeing method is used, which only dyes the cotton and does not dye the core material T400 or the spandex yarn. This dyeing method avoids dyeing T400 under high temperature and high pressure, and does not involve the problem of high temperature dyeing polyester damaging the elasticity of spandex. However, it cannot guarantee that the fabric color is completely consistent, and there will be defects such as uneven dyeing of the fabric surface due to the core being exposed.

[0005] CN116288861A discloses a double-core elastic fabric made of regenerated cellulose fiber yarn and its finishing method. The core yarn raw material is a mixture of T400 and spandex elastic yarn. The process involves bleaching and dyeing the warp yarns, and steaming the core yarns at a high temperature of 120℃-130℃ for 30-40 minutes, followed by dyeing for further setting. The core sheath of the weft yarns is bleached and dyed at a normal low temperature of 90-110℃. The yarn weaving process has a warp yarn density of 130-150 ends / inch and a weft yarn density of 80-100 ends / inch. The yarn weaving is carried out using a rapier loom with a speed of 400r-450r, a loom tension of 3.0-3.2KN, a heddle flattening time of 320°-330°, a back beam height of 0-4 grids, and a back beam depth of 4-6 grids. Fabric finishing: singeing → desizing → stretching → pre-shrinking; stretching agent is BP-230, with a concentration of 10g / L-30g / L, and softener is 530F, with a concentration of 10g / L-30g / L. This method uses regenerated cellulose fiber as the warp raw material and does not involve the production of warp beams for double-core yarns. Although the weft yarn uses double-core yarns of regenerated cellulose wrapped with T400 + spandex, it employs a high-temperature steam setting followed by dyeing at 90-110℃. This process causes significant damage to yarn elasticity and is only suitable for medium-low weft elastic fabrics with low weft elasticity requirements. This process is not suitable for warp beam dyeing, leading to two problems: firstly, after steam setting, tight bobbin splitting is required, increasing the process steps, and uneven bobbin tension can easily cause bubbling on the fabric surface; secondly, during warp beam dyeing, due to the high warp beam tension, the yarn elasticity loss during the dyeing process is significant. After high-temperature setting followed by high-temperature dyeing, the yarn elasticity cannot meet the 15% elasticity recovery rate requirement for warp yarns in four-way stretch fabrics. Summary of the Invention

[0006] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide a method for producing warp beams of T400 and spandex elastic double-core spun yarn. This method achieves the purpose of warp beam dyeing of T400 + spandex elastic double-core spun yarn, shortens the production process, improves production efficiency, and the prepared core-spun yarn maintains high elastic elongation and recovery rate, with uniform elasticity, color and fastness of the inner and outer layers, thereby meeting the requirements of high elastic elongation and recovery in the warp direction of yarn-dyed fabrics.

[0007] The method for producing T400, spandex elastic double-core spun yarn warp beams according to the present invention includes the following steps:

[0008] 1) Steaming of raw yarn:

[0009] T400, spandex elastic double-core core-spun yarn is placed in a steaming cylinder at a density of 1-1.1KG / piece and steamed. After steaming, the cylinder is opened and the temperature is lowered to room temperature.

[0010] 2) Rewinding the original yarn:

[0011] The steamed yarn is then rewinded on a tight winding machine;

[0012] 3) Warping of raw yarn:

[0013] Select a warp beam, cover it with a sandwich-type composite material, adjust the warping machine parameters, and perform warping.

[0014] 4) Pre-treatment of the shaft:

[0015] The warp beam is fixed on the beam frame and suspended into the dyeing vat. When the leather material is regenerated cellulose, add refining agent SA-E 1-3g / L and degreasing agent TF-109H 1-2g / L. Heat to 90-100℃ and maintain for 15-20 minutes before draining. Alternatively, add warm water and heat to 55-60℃ and maintain for 7-10 minutes before draining. When the leather material is pure cotton or cotton blend, add mixed auxiliaries after adding warm water, circulate for 5-10 minutes, then reflux and add hydrogen peroxide. Heat at 2-2.5℃ / min to 70-85℃ and maintain for 40-50 minutes before draining. Alternatively, add warm water and heat to 55-60℃ and maintain for 7-10 minutes before draining. Add room temperature water, add deoxygenating enzyme and neutralizing acid, heat to 50-55℃, maintain for 15-20 minutes, and then drain.

[0016] 5) Axial staining:

[0017] Add warm water and 1-2 g / L of dispersing and leveling agent DL-PL to the main tank. Adjust the pH to 4-5 with acid. After that, add disperse dye to the main tank and heat to 115-125℃ at a rate of 0.8-1℃ / min, hold for 30-40 minutes, and then drain. Add warm water and heat to 70-80℃, hold for 7-10 minutes, and then drain. Add room temperature water and 5-80 g / L of sodium sulfate to the main tank, hold for 5-10 minutes, and then add leveling agent LARLR to the main tank. Add 1-2 g / L of reactive dye to the main tank, keep it warm for 10-20 min, then raise the temperature to 55-60℃ at a rate of 1-1.5℃ / min and hold for 10-20 min. Add 10-25 g / L of soda ash to the main tank, completing the addition over 20-30 min, keep it warm for 40-50 min, and then drain the liquid. Add warm water, raise the temperature to 55-60℃ and hold for 7-10 min, and then drain the liquid. Add hot water to the main tank, then add 1-2 g / L of non-reducing cleaning soaping agent GIN, raise the temperature to 95-100℃ and hold for 15-20 min, and then drain the liquid. After soaping, add warm water, rinse with water, and then drain the liquid.

[0018] 6) Dehydration:

[0019] The warp shaft is placed on a vacuum dehydrator for dehydration. After dehydration, the moisture content of the warp shaft is 60-65%.

[0020] Preferably, the air pressure during steaming in step 1) is not less than 6 bar, the steaming temperature is 90-100℃, the steaming time is 40-60 min, and 2-3 cycles are performed.

[0021] Preferably, in step 2), the re-turning is performed using a conical paper tube, with the tension plate lifted, the machine speed at 600-700 m / min, and the spacing at 0.2-0.3 mm.

[0022] Preferably, the sandwich composite material in step 3) consists of two layers of polyester fabric with plastic filaments in the middle, and has a specification of 540-600 g / m². 2 × Width 1600mm, thickness 7-8mm.

[0023] Preferably, the tension of the warping in step 3) is 0-4 mm, the pressure is 15-30 daN, and the speed is 500-600 m / min.

[0024] Preferably, the warp beam in step 4) is a medium or large beam, with a height of 1600 mm, a diameter of 160-226 mm, and a density of 0.48-0.50 g / cm³. 3 The density deviation of a single batch of yarn cones or warp beams is within 0.02 g / cm³. 3 Within.

[0025] Preferably, the bath ratio for warp dyeing in step 5) is 1:10-20, and the pump speed of the dyeing machine is 75-85%.

[0026] Preferably, the disperse dye in step 5) is an SE type dye or / and an S type dye, and the reactive dye is a medium-temperature reactive dye.

[0027] Preferably, the ambient water temperature is 20-30℃, the warm water temperature is 45-55℃, and the hot water temperature is 80-90℃.

[0028] Preferably, the dehydration time in step 6) is 10-15 min. The refining agents SA-E (lauryl alcohol polyoxyethylene ether, Lurui Fine Chemical Co., Ltd.), TF-109H (a mixture of aliphatic products of polyethylene glycol ether and fatty amine oxidation agents, Transfar Smart Chemical Co., Ltd.), dispersing and leveling agent DL-PL (a compound of organic esters and surfactants, Lurui Fine Chemical Co., Ltd.), leveling agent LARLR (a polycarboxylic acid modified polymer, Lurui Fine Chemical Co., Ltd.), and original cleaning soaping agent GIN (a glucose preparation containing dispersants, Jiahe Chemical Co., Ltd.) are mentioned.

[0029] Specifically, the method for producing the T400, spandex elastic double-core spun yarn warp beam includes the following steps:

[0030] 1) Steaming of raw yarn:

[0031] Place T400 and spandex elastic double-core core-spun tight yarns at 1-1.1KG / piece in the steaming cylinder of the vacuum yarn humidity adjuster and steamer. The air pressure during steaming should not be lower than 6 bar, the steaming temperature should be 90-100℃, and the steaming time should be 40-60 minutes. After steaming for 2-3 cycles, open the cylinder and cool it to room temperature before taking out the yarn.

[0032] 2) Rewinding the original yarn:

[0033] The steamed yarn is then rewinded on a tight winding machine. During the rewinding, a conical paper tube is used, the tension plate is lifted, the machine speed is 600-700m / min, and the spacing is 0.2-0.3mm.

[0034] 3) Warping of raw yarn:

[0035] Based on the order quantity and number of warp beams, select the appropriate warp beam and coat it with a sandwich-type composite material. Adjust the warping machine parameters: warping tension set to 0-4mm, pressure to 15-30daN, and machine speed to 500-600m / min. Use medium or large warp beams with a height of 1600mm, a diameter of 160-226mm, and a density of 0.48-0.50g / cm³. 3 The density deviation of a single batch of yarn cones or warp beams is within 0.02 g / cm³. 3 The sandwich-type composite material used consists of two layers of polyester fabric with a plastic filament in the middle, and a specification of 540-600g / m². 2 × Width 1550-1600mm, thickness 7-8mm.

[0036] 4) Pre-treatment of the shaft:

[0037] Fix the warp beam on the beam frame and suspend it in the dyeing vat. Add warm water. When the leather material is regenerated cellulose, add refining agent SA-E 1-3g / L and degreasing agent TF-109H 1-2g / L. Heat to 90-100℃ and hold for 15-20 minutes before draining. Add warm water and heat to 55-60℃ and hold for 7-10 minutes before draining. When the leather material is pure cotton or cotton blend, add mixed auxiliaries after adding warm water, circulate for 5-10 minutes, then add hydrogen peroxide back to the reflux. Heat at 2-2.5℃ / min to 70-85℃ and hold for 40-50 minutes before draining. Add warm water and heat to 55-60℃ and hold for 7-10 minutes before draining. Add room temperature water, add deoxygenating enzyme and neutralizing acid, heat to 50-55℃, hold for 15-20 minutes before draining. The warp beams are medium and large, with a height of 1600mm, a diameter of 160-226mm, and a density of 0.48-0.50g / cm³. 3 The density deviation of a single batch of yarn cones or warp beams is within 0.02 g / cm³. 3 Within.

[0038] 5) Axial staining:

[0039] Add warm water and 1-2 g / L of dispersing and leveling agent DL-PL to the main tank. Adjust the pH to 4-5 with acid. After that, add disperse dye to the main tank and heat to 115-125℃ at a rate of 0.8-1℃ / min, hold for 30-40 minutes, and then drain. Add warm water and heat to 70-80℃, hold for 7-10 minutes, and then drain. Add room temperature water and 5-80 g / L of sodium sulfate to the main tank, hold for 5-10 minutes, and then add leveling agent LARLR to the main tank. Add 1-2 g / L of reactive dye to the main tank, keep warm for 10-20 min, then heat to 55-60℃ at a rate of 1-1.5℃ / min and hold for 10-20 min. Add 10-25 g / L of soda ash to the main tank over 20-30 minutes, keep warm for 40-50 min, then drain. Add warm water, heat to 55-60℃ and hold for 7-10 min, then drain. Add hot water to the main tank, then add 1-2 g / L of non-reducing cleaning soaping agent GIN, heat to 95-100℃ and hold for 15-20 min, then drain. Depending on the concentration of disperse and reactive dyes, perform one, two, or multiple soaping washes. After completion, rinse with warm water for 10 min and then drain. The bath ratio for shaft dyeing is 1:10-20, the dyeing machine pump speed is 75-85%, and one to three types of SE or S disperse dyes and one to three types of medium-temperature reactive dyes are used.

[0040] 6) Dehydration:

[0041] The warp shaft is placed on a vacuum dehydrator for dehydration for 10-15 minutes. After dehydration, the moisture content of the warp shaft is 60-65%.

[0042] Throughout the entire process, the ambient water temperature is 20-30℃, the warm water temperature is 45-55℃, and the hot water temperature is 80-90℃.

[0043] The T400+spandex dual-core elastic yarn fabric of this invention combines the superior elasticity of spandex with the stable and excellent elastic recovery of T400 bicomponent composite filaments. It also has the advantages of outer short fiber, T400, and spandex, overcoming some of the drawbacks of spandex core-spun yarn fabrics, such as the elasticity of the garment weakening and the garment becoming increasingly bulky with each wash; the tendency for spandex filaments to pull or break at seams; and the bulging of elastic pants at stress points such as the knees and buttocks. The present invention provides a method for producing warp beams of T400+spandex elastic double-core spun yarn. By steaming, rewinding, warping, and dyeing the T400+spandex elastic double-core spun yarn, the warp beam of the yarn is dyed, shortening the production process and improving production efficiency. During the production process, the warp beam is covered with a sandwich-type composite material and a special dyeing process is used to ensure that the dyed yarn maintains a high elastic elongation and recovery rate, and the elasticity, color, and fastness of the inner and outer layers are uniform, thereby meeting the requirements of high elastic elongation and recovery in the warp direction of yarn-dyed fabrics.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] The present invention discloses a method for producing warp beams of T400 and spandex elastic double-core core-spun yarn. By steaming, rewinding, warping, and dyeing the T400+spandex elastic double-core core-spun yarn, the warp beam of T400+spandex elastic double-core core-spun yarn is achieved. The production process is short and efficient. During the production process, the inner layer of the warp beam is covered with a sandwich-type composite material and a special dyeing process is used to ensure that the dyed yarn maintains a high elastic elongation and recovery rate, thereby meeting the requirements of high elastic elongation and recovery in the warp direction of yarn-dyed fabrics and ensuring stable production quality. Detailed Implementation

[0046] The present invention will be further described below with reference to embodiments. The ambient water temperature described below is 20-30℃, the warm water temperature is 45-55℃, and the hot water temperature is 80-90℃. Therefore, these will not be discussed further.

[0047] Example 1

[0048] Variety 1: AKQ0G0G1-2200007-1, Specifications: MODAL / TENCEL40(30DT400+40DLYCRA)*MODAL / TENCEL40(30DT400+40DLYCRA)*120*90*53 / 54, warp dyeing shaft, specific steps are as follows:

[0049] 1) The raw yarn steaming process is as follows: T400+ spandex elastic double core-spun yarn is placed in the steaming cylinder of the vacuum yarn humidity adjustment and steaming machine at a rate of 1KG / piece. The air pressure is 6 bar, the steaming temperature is 100℃, and the steaming time is 60 minutes. After steaming for 2 cycles, the cylinder is opened and the temperature is lowered to room temperature. The yarn is then taken out.

[0050] 2) The original yarn rewinding process is as follows: the steamed yarn is rewinded on a tight winding machine. During rewinding, a conical paper tube is used, the tension plate is lifted, the machine speed is 600m / min, and the interval is 0.3mm.

[0051] 3) The raw yarn warping process is as follows: Based on the order batch length, the designed warping length is 2256m, with 643 warping heads and 10 warping ends. Based on the warping weight of a single warp beam being 24.63KG, a large warp beam with a height of 1600mm and a diameter of 226mm is selected for warping. Before warping, a layer of sandwich-type composite material is wrapped around the warp beam. The warping tension is adjusted to 0mm, the pressure to 20daN, the machine speed to 550m / min, and the warping density to 0.494-0.496g / cm³. 3 The sandwich-type composite material used consists of two layers of polyester fabric with a plastic filament in the middle, and a specification of 600g / m². 2 × Width 1600mm, thickness 8mm.

[0052] 4) The pretreatment process of the warp shaft is as follows: fix the warp shaft on the shaft frame and suspend it into the dyeing vat. After adding warm water, add refining agent SA-E 2g / L and degreasing agent TF-109H 1g / L. Heat to 100℃ and maintain for 15 minutes before draining the liquid. Add warm water and heat to 55℃ and maintain for 7 minutes before draining the liquid.

[0053] 5) The dyeing process is as follows: Add warm water and 1 g / L of dispersing and leveling agent DL-PL to the main tank. Adjust the pH to 4.5 with acid. After that, add 0.128% Blue SE-RPD, 0.025% Red SE-RPD, and 0.003% Yellow SE-RPD to the main tank. Heat to 115℃ at a rate of 1℃ / min and maintain for 30 minutes, then drain. Add warm water and heat to 70℃ and maintain for 7 minutes, then drain. Add room temperature water and 5 g / L of sodium sulfate to the main tank. Maintain for 5 minutes, then add 2 g / L of leveling agent LARLR and 0.058% Blue K-HL, 0.013% Red K-3BS150%, and Yellow SE-RPD to the main tank. K-3RS 150% 0.009%, held at temperature for 10 min, then heated to 60℃ at a rate of 1℃ / min and held for 20 min. Add 10 g / L of soda ash to the main tank over a 20-minute interval, hold for 40 min, then drain. Add warm water, heat to 55℃ and hold for 7 min, then drain. Add hot water to the main tank, then add 1 g / L of non-reducing cleaning soap (GIN), heat to 95℃ and hold for 15 min, then drain. Finally, add warm water and rinse for 10 min, then drain. The bath ratio for shaft dyeing is 1:12, and the dyeing machine pump speed is 75%.

[0054] 6) The dehydration process is as follows: the warp shaft is placed on a vacuum dehydrator for dehydration for 15 minutes. After dehydration, the moisture content of the warp shaft is 62%.

[0055] Example 2

[0056] Variety 2: AKQ0G0G1-2200007-2, Specifications: MODAL / TENCEL40(30DT400+40DLYCRA)*MODAL / TENCEL40(30DT400+40DLYCRA)*120*90*53 / 54, warp dyeing shaft, specific steps are as follows:

[0057] 1) The raw yarn steaming process is as follows: T400+ spandex elastic double core-spun yarn is placed in the steaming cylinder of the vacuum yarn humidity adjustment and steaming machine at a density of 1.1KG / piece. The air pressure is 6bar, the steaming temperature is 100℃, and the steaming time is 60min. After steaming for 2 cycles, the cylinder is opened and the temperature is lowered to room temperature. The yarn is then taken out.

[0058] 2) The original yarn rewinding process is as follows: the steamed yarn is rewinded on a tight winding machine. During rewinding, a conical paper tube is used, the tension plate is lifted, the machine speed is 600m / min, and the interval is 0.3mm.

[0059] 3) The raw yarn warping process is as follows: Based on the order batch length, the designed warping length is 1352m, with 643 warping heads and 10 warping ends. Based on the warping weight of a single warp beam being 14.76KG, a warp beam with a height of 1600mm and a diameter of 160mm is selected for warping. Before warping, a layer of sandwich-type composite material is wrapped around the warp beam. The warping tension is adjusted to 0mm, the pressure to 25daN, the machine speed to 550m / min, and the warping density to 0.491-0.495g / cm³. 3 The sandwich-type composite material used consists of two layers of polyester fabric with a plastic filament in the middle, and a specification of 600g / m². 2 × Width 1600mm, thickness 8mm.

[0060] 4) The pretreatment process of the warp shaft is as follows: fix the warp shaft on the shaft frame and suspend it into the dyeing vat. After adding warm water, add refining agent SA-E 2g / L and degreasing agent TF-109H 2g / L. Heat to 90℃ and maintain for 20 minutes before draining the liquid. Add warm water and heat to 60℃ and maintain for 10 minutes before draining the liquid.

[0061] 5) The dyeing process is as follows: Add warm water and DL-PL 2g / L dispersing and leveling agent to the main tank. Adjust the pH to 4.6 with acid. After that, add Navy Blue S-WF 0.75%, Red S-WF 0.12%, and Yellow S-WF 0.30% disperse dyes to the main tank. Heat to 125℃ at a rate of 0.8℃ / min and maintain for 40 minutes, then drain. Add warm water and heat to 80℃ and maintain for 10 minutes, then drain. Add room temperature water and 35g / L sodium sulfate to the main tank. Maintain for 10 minutes, then add LARLR 2g / L leveling agent and AVITERA DEEP BLUE SE 2.2%, AVITERA RED SE 0.62%, and AVITERA YELLOW SE to the main tank. 0.45%, hold at this temperature for 20 minutes, then increase the temperature to 60℃ at a rate of 1℃ / min and hold for another 20 minutes. Add 20g / L of soda ash to the main tank at a ratio of 30 minutes, hold for 50 minutes, then drain. Add warm water, increase the temperature to 60℃ and hold for 10 minutes, then drain. Add hot water to the main tank, then add 2g / L of non-reducing cleaning soap (GIN), increase the temperature to 98℃ and hold for 20 minutes, then drain. Perform two soaping cycles. After washing, add warm water for 10 minutes and drain. The liquor ratio for shaft dyeing is 1:20, and the dyeing machine pump speed is 80%.

[0062] 6) The dehydration process is as follows: the warp shaft is placed on a vacuum dehydrator for dehydration for 15 minutes. After dehydration, the moisture content of the warp shaft is 60%.

[0063] Example 3

[0064] Variety 3: AK9L9L1-2300004-4, Specifications: Egyptian cotton 50 (30DT400+40DLYCRA) * Egyptian cotton 50 (30DT400+40DLYCRA) * 240 * 160 * 53 / 54, warp dyeing beam, specific steps are as follows:

[0065] 1) The raw yarn steaming process is as follows: T400+ spandex elastic double core-spun yarn is placed in the steaming cylinder of the vacuum yarn humidity adjustment and steaming machine at a rate of 1KG / piece. The air pressure is 7bar, the steaming temperature is 90℃, and the steaming time is 40min. After steaming for 3 cycles, the cylinder is opened and the temperature is lowered to room temperature. The yarn is then taken out.

[0066] 2) The process of rewinding the raw yarn is as follows: the steamed yarn is rewinded on a tight winding machine. During rewinding, a conical paper tube is used, the tension plate is lifted, the machine speed is 700m / min, and the interval is 0.2mm.

[0067] 3) The raw yarn warping process is as follows: Based on the order batch length, the designed warping length is 626m, the warping head portion is 644 heads, and the number of warping heads is 4. Based on the warping weight of a single warp beam being 5.47KG, a warp beam with a height of 1600mm and a diameter of 160mm is selected for warping. Before warping, a layer of sandwich-type composite material is wrapped around the warp beam. The warping tension is adjusted to 4mm, the pressure to 25daN, the machine speed to 600m / min, and the warping density to 0.481-0.490g / cm³. 3 The sandwich-type composite material used consists of two layers of polyester fabric with a plastic filament in the middle, and a specification of 540g / m². 2 × Width 1600mm, thickness 7mm.

[0068] 4) The pretreatment process before shaft entry is as follows: After entering warm water, add mixed additives, circulate for 7 minutes, then reflux and add hydrogen peroxide, raise the temperature to 80℃ at 2℃ / min and maintain for 40 minutes before draining; after entering warm water, raise the temperature to 60℃ and maintain for 10 minutes before draining; after entering room temperature water, add 0.15g / L of deoxygenase and 0.7g / L of neutralizing acid, raise the temperature to 55℃ and maintain for 15 minutes before draining.

[0069] 5) The dyeing process is as follows: Add warm water and DL-PL 2g / L dispersing and leveling agent to the main tank. Adjust the pH to 4.5 with acid. After that, add Navy Blue S-WF 2.0%, Red S-WF 0.01%, and Black S-WF 1.0% disperse dyes to the main tank. Heat to 125℃ at a rate of 0.8℃ / min and maintain for 40 minutes, then drain. Add warm water and heat to 80℃ and maintain for 10 minutes, then drain. Add room temperature water and 70g / L sodium sulfate to the main tank. Maintain for 10 minutes, then add LARLR 2g / L leveling agent and AVITERA DEEP BLUE SE 2.85%, AVITERARED SE 0.80%, and AVITERAYELLOW SE to the main tank. 0.38%, after holding at this temperature for 20 minutes, increase the temperature to 60℃ at a rate of 1℃ / min and hold for another 20 minutes. Add 20g / L of soda ash to the main tank at a ratio of 30 minutes, hold for 50 minutes, and then drain. Add warm water, increase the temperature to 60℃ and hold for 10 minutes, and then drain. Add hot water to the main tank, then add 2g / L of non-reducing cleaning soap (GIN), increase the temperature to 100℃ and hold for 20 minutes, and then drain. Repeat the soaping process three times. After completion, add warm water, rinse for 10 minutes, and then drain. The liquor ratio for shaft dyeing is 1:10, and the dyeing machine pump speed is 85%.

[0070] 6) The dehydration process is as follows: the warp shaft is placed on a vacuum dehydrator for dehydration for 10 minutes. After dehydration, the moisture content of the warp shaft is 65%.

[0071] Comparative Example 1

[0072] The yarn specification is a MODAL / TENCEL blend, 40 count, packaged as 30DT400+40DLYCRA, and the preparation process using conventional warp beam dyeing is as follows:

[0073] 1) Raw yarn warping: Based on the warping weight of a single warp beam, select a suitable warp beam for raw yarn warping, with a warping density of 0.48-0.50 g / cm³. 3 The density deviation of a single batch of warp beams is within 0.02 g / cm³. 3 Inside

[0074] 2) Pre-processing:

[0075] The pretreatment process and parameters are the same as in Example 1.

[0076] 3) Staining:

[0077] The staining process and parameters are the same as in Example 1.

[0078] 4) Post-processing:

[0079] The post-processing procedure is the same as in Example 1.

[0080] 5) Dehydration:

[0081] The dehydration process is the same as in Example 1.

[0082] Comparative Example 2

[0083] The yarn specification is MODAL / TENCEL blend, 40 count, packaged as 30DT400+40DLYCRA. The preparation process, which involves pre-shrinking and setting followed by conventional warp beam dyeing, is as follows:

[0084] 1) Loose winding:

[0085] T400+spandex double-core yarn is wound onto a loose-type winding machine. After winding, the individual weight is 1.0 kg, and the yarn density is 0.38 g / cm³. 3 The yarn cones are regular cylinders, and the density deviation of a single batch of yarn cones is ±0.02 g / cm³. 3 Within.

[0086] 2) Pre-shrinkage shaping:

[0087] After the yarn cones are fixed on the yarn rack, they are suspended into the dyeing vat, filled with warm water, heated to 130℃ and kept at that temperature for 20 minutes, and then drained.

[0088] 3) Dehydration and drying in separate drums:

[0089] After dehydration, the yarn is dried in an RF dryer. After drying, it is placed for 24 hours to reach equilibrium, and then divided into coils according to the specified length and number of heads on a winding machine.

[0090] 4) Raw yarn warping: Based on the warping weight of a single warp beam, select a suitable warp beam for raw yarn warping, with a warping density of 0.48-0.50 g / cm³. 3 The density deviation of a single batch of warp beams is within 0.02 g / cm³. 3 Inside

[0091] 5) Pre-processing:

[0092] The pretreatment process and parameters are the same as in Example 2.

[0093] 6) Staining:

[0094] The staining process and parameters are the same as in Example 2.

[0095] 7) Post-processing:

[0096] The post-processing procedure is the same as in Example 2.

[0097] 8) Dehydration:

[0098] The dehydration process is the same as in Example 2.

[0099] Comparative Example 3

[0100] The yarn specifications are Egyptian cotton 50 count 30DT400+40DLYCRA. The preparation process, which involves reducing the pre-shrinking setting temperature and then reducing the warp beam dyeing temperature, is as follows:

[0101] 1) Loose winding:

[0102] T400+spandex double-core yarn was rewinded on a loose-type winding machine. After rewinding, the individual weight was 1.1 kg, and the yarn density was 0.39 g / cm³. 3 The yarn cones are regular cylinders, and the density deviation of a single batch of yarn cones is ±0.02 g / cm³. 3 Within.

[0103] 2) Pre-shrinkage shaping:

[0104] After the yarn cones are fixed on the yarn rack, they are suspended into the dyeing vat, filled with warm water, heated to 125℃ and kept at that temperature for 20 minutes, and then drained.

[0105] 3) Dehydration and drying in separate drums:

[0106] After dehydration, the yarn is dried in an RF dryer. After drying, it is placed for 24 hours to reach equilibrium, and then divided into coils according to the specified length and number of heads on a winding machine.

[0107] 4) Raw yarn warping: Based on the warping weight of a single warp beam, select a suitable warp beam for raw yarn warping, with a warping density of 0.48-0.50 g / cm³. 3 The density deviation of a single batch of warp beams is within 0.02 g / cm³. 3 Inside

[0108] 5) Pre-processing:

[0109] The pretreatment process and parameters are the same as in Example 3.

[0110] 6) Staining:

[0111] Add warm water and dispersing agent to the main tank, adjust the pH with acid, then add disperse dye to the main tank, heat to 120°C at a rate of 0.8°C / min and maintain for 40 minutes before draining; the subsequent dyeing process and parameters are the same as in Example 3.

[0112] 7) Post-processing:

[0113] The post-processing procedure is the same as in Example 3.

[0114] 8) Dehydration:

[0115] The dehydration process is the same as in Example 3.

[0116] The elastic elongation and recovery rate of the inner and outer layers of the warp beam after dyeing were tested in Examples 1-3 and Comparative Examples 1-3. The color difference value of the inner layer yarn was tested with the color of the outer layer yarn as the standard. The test results are shown in Table 1. The rubbing fastness, washing fastness and migration fastness of the inner and outer layers of the warp beam were tested. The test results are shown in Table 2.

[0117] Table 1

[0118]

[0119] The internal control standards for color difference values ​​between the inner and outer colors in Table 1 are as follows: a color difference value within 0.5 (inclusive) is classified as level 4 / 5; a color difference value between 0.5 and 1.3 (inclusive) is classified as level 4; a color difference value between 1.3 and 2.1 (inclusive) is classified as level 3 / 4; a color difference value between 2.1 and 3.0 (inclusive) is classified as level 3; a color difference value between 3.0 and 4.1 (inclusive) is classified as level 2 / 3; and a color difference value between 4.1 and 5.6 (inclusive) is classified as level 2. Level 3 and below are considered to have large inner and outer color differences, and the warp shaft cannot be used.

[0120] Table 2

[0121]

[0122] Of course, the above description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the embodiments of the present invention. The present invention is also not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. A method for producing a warp beam of T400, spandex elastic double-core yarn, characterized in that: Includes the following steps: 1) Steaming of raw yarn: T400 and spandex elastic double-core core-spun yarns are placed in a steaming cylinder at a density of 1-1.1 kg / piece. After steaming, the cylinder is opened and the temperature is lowered to room temperature. 2) Rewinding the original yarn: The steamed yarn is then rewinded on a tight winding machine; the rewinding uses a conical paper tube, with the tension plate lifted, at a speed of 600-700m / min and a spacing of 0.2-0.3mm. 3) Warping of raw yarn: Select a warp beam and wrap it with a sandwich composite material. Adjust the warping machine parameters and perform warping. The upper and lower layers of the sandwich composite material are polyester fabric, and the middle layer is plastic filament. 4) Pre-treatment of the shaft: The warp beam is fixed on the beam frame and suspended into the dyeing vat. When the leather material is regenerated cellulose, add refining agent SA-E 1-3g / L and degreasing agent TF-109H 1-2g / L. Heat to 90-100℃ and maintain for 15-20 minutes before draining. Alternatively, add warm water and heat to 55-60℃ and maintain for 7-10 minutes before draining. When the leather material is pure cotton or cotton blend, add mixing auxiliaries after adding warm water, circulate for 5-10 minutes, then reflux and add hydrogen peroxide. Heat at 2-2.5℃ / min to 70-85℃ and maintain for 40-50 minutes before draining. Alternatively, add warm water and heat to 55-60℃ and maintain for 7-10 minutes before draining. Add room temperature water, add deoxygenating enzyme and neutralizing acid, heat to 50-55℃, maintain for 15-20 minutes, and then drain. 5) Axial staining: Add warm water and 1-2 g / L of dispersing and leveling agent DL-PL to the main tank. Adjust the pH to 4-5 with acid. After that, add disperse dye to the main tank and heat to 115-125℃ at a rate of 0.8-1℃ / min, hold for 30-40 minutes, and then drain. Add warm water and heat to 70-80℃, hold for 7-10 minutes, and then drain. Add room temperature water and 5-80 g / L of sodium sulfate to the main tank, hold for 5-10 minutes, and then add leveling agent LARLR to the main tank. Add 1-2 g / L of reactive dye to the main tank, keep warm for 10-20 min, then heat to 55-60℃ at a rate of 1-1.5℃ / min and hold for 10-20 min. Add 10-25 g / L of soda ash to the main tank, completing the addition over 20-30 min, keep warm for 40-50 min, then drain. Add warm water, heat to 55-60℃ and hold for 7-10 min, then drain. Add hot water to the main tank, then add 1-2 g / L of non-reducing cleaning soaping agent GIN, heat to 95-100℃ and hold for 15-20 min, then drain. After soaping, add warm water, rinse, and then drain. The disperse dye is a SE type dye and / or an S type dye, and the reactive dye is a medium-temperature reactive dye. 6) Dehydration: The warp shaft is placed on a vacuum dehydrator for dehydration. After dehydration, the moisture content of the warp shaft is 60-65%.

2. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: Step 1) The air pressure during yarn steaming should not be lower than 6 bar, the steaming temperature should be 90-100℃, the steaming time should be 40-60 minutes, and 2-3 cycles should be performed.

3. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: Step 3) The warping pressure is 15-30 daN, and the machine speed is 500-600 m / min.

4. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: The sandwich composite material in step 3) has a specification of 540-600 g / m³. 2 × Width 1600mm, thickness 7-8mm.

5. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: Step 4) uses medium and large warp beams, with a height of 1600mm, a diameter of 160-226mm, and a density of 0.48-0.50g / cm³. 3 .

6. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: Step 5) The bath ratio for shaft dyeing is 1:10-20, and the pump speed of the dyeing machine is 75-85%.

7. The method for producing T400, spandex elastic double-core spun yarn warp beams according to claim 1, characterized in that: The normal temperature for water is 20-30℃, the warm temperature for water is 45-55℃, and the hot temperature for water is 80-90℃.

8. The method for producing T400, spandex elastic double-core core-spun yarn warp beams according to claim 1, characterized in that: The dehydration time for step 6) is 10-15 minutes.

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