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CN-122013562-A - Weaving and dyeing integrated process method for cationic cotton-like polyester composite filament fabric

CN122013562ACN 122013562 ACN122013562 ACN 122013562ACN-122013562-A

Abstract

The invention discloses a weaving and dyeing and finishing integrated process method of a cationic cotton-like polyester composite filament fabric. The method comprises the steps of weaving cationic polyester composite filaments into grey cloth, continuously finishing scouring, relaxation preshrinking and presetting in the same dyeing equipment, selectively dyeing cationic dye to a set exhaustion rate at 80-95 ℃ and pH 4.0-5.0 under the condition that the cloth is not taken out and the cylinder is not replaced, adding disperse dye and raising the exhaustion rate to 120-130 ℃ for fixation, then adjusting the alkali adding agent in real time according to the weight loss rate under the same dyeing bath condition, stopping adding after the weight loss rate reaches a preset target value, and obtaining a finished product through neutralization and water washing, hydrophilic soft antistatic finishing and low-tension heat setting. The method can stably form the diffuse reflection cotton-like appearance and soft hand feeling, improves the consistency of double-color layers and batches, and reduces chromatic aberration and decrement fluctuation.

Inventors

  • ZHAO XIANLIANG
  • MAO GUOLIANG
  • ZHAO XIANJUAN
  • ZHANG GUORONG
  • SHEN QIUHUA
  • WU ZHENGDONG

Assignees

  • 浙江旭龙新材料有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The method for integrating weaving and dyeing of the cationic cotton-like polyester composite filament fabric is characterized by comprising the following steps of: S1, false twisting or air deformation is carried out on cationic dyeable polyester filaments and conventional or high-shrinkage polyester filaments in the same deformation channel, and a nozzle is used for interlacing to form a strand of composite filaments, wherein the interlacing point is 60-180/m; S2, weaving grey cloth by taking the composite yarn as warp yarn or weft yarn; S3, sequentially refining, relaxing, preshrinking and preshrinking the grey cloth in the same jet dyeing machine; S4, under the condition that the cloth is not discharged and the cylinder is not replaced, the cationic dye is firstly dyed to a set exhaustion rate on the cationic component selectively at 80-95 ℃ and pH 4.0-5.0, and then the disperse dye is added and is raised to 120-130 ℃ for fixation; and S5, under the same dye bath condition, adding an alkaline agent in real time according to the weight loss rate obtained by online detection or calculation, stopping adding after the weight loss rate reaches a preset target value, and performing neutralization and water washing, hydrophilic soft antistatic finishing and low Zhang Lire setting to obtain the cationic cotton-like composite filament fabric with diffuse reflection on the surface, cotton-like hand feeling and stable double-color layering.
  2. 2. The method according to claim 1, wherein the cationic dyeable polyester filaments in the step S1 are cationic dyeable polyester filaments, the conventional or high shrinkage polyester filaments are FDY or POY textured filaments, the linear density ratio of the two components is (30-70): (70-30), and the overfeed rate in air deformation is 5-25%.
  3. 3. The method according to claim 1, wherein the grey fabric in the step S2 is one of plain weave, twill weave or satin weave, warp density is 60 to 140 yarns/inch, weft density is 50 to 120 yarns/inch, and the composite yarn is at least one of warp yarn and weft yarn.
  4. 4. The method according to claim 1, wherein the scouring temperature in the step S3 is 60-90 ℃, the relaxing preshrinking is performed under the condition of 2-10% overfeeding under low tension, and the preshaping temperature is 150-190 ℃ and the time is 20-60S.
  5. 5. The method according to claim 1, wherein the exhaustion rate is set to 70-95% in the step S4, the pH of the dye bath is adjusted to 3.0-4.0 after the exhaustion rate is set, the disperse dye, the dispersing agent and the leveling agent are added, the temperature is raised to 120-130 ℃ at 1-2 ℃ per min, and the temperature is kept for 30-60 min.
  6. 6. The method according to claim 1, wherein the weight loss ratio of the weight loss corresponding to the preset target value in step S5 is 3-8%, and the on-line detection or calculation is determined based on at least two or more parameters of fabric in-out cloth weight difference, bath alkalinity or conductivity, and treatment time.
  7. 7. The method of claim 1, wherein the number of interlacing points of the composite yarn is 80-150/m, and the boiling water shrinkage difference of the two components is 3-12%, so as to form a cotton-like volume feeling and a surface diffuse reflection appearance in the relaxation pre-shrinking and low-tension heat setting stages.
  8. 8. The method according to claim 1, wherein the hydrophilic softening antistatic finishing comprises a compound finishing of a polyether modified silicone oil softener and a hydrophilic antistatic agent, and the finishing temperature is 60-90 ℃ and the finishing time is 10-30 min.
  9. 9. The weaving and dyeing and finishing integrated control system for implementing the method according to any one of claims 1-8 is characterized by comprising a temperature range and feeding sequence control module, a pH control module, a weight loss weight rate online detection or calculation module and a low-tension heat setting control module, wherein the weight loss weight rate online detection or calculation module is used for outputting a weight loss end point and controlling alkali agent feeding to stop in a linkage mode.
  10. 10. A cationic cotton-like polyester composite filament fabric is characterized by being prepared by the method of any one of claims 1-8, and comprises interlaced composite filaments composed of a cationic dyeable polyester component and a conventional or high-shrinkage polyester component, wherein the number of the interlaced composite filaments is 60-180/m, and the composite filaments are subjected to one-bath sectional selective dyeing and alkali weight reduction treatment with 3-8% weight loss ratio control to present cotton-like hand feeling and stable double-color gradation.

Description

Weaving and dyeing integrated process method for cationic cotton-like polyester composite filament fabric Technical Field The invention belongs to the technical field of textile dyeing and finishing, and particularly relates to a weaving and dyeing and finishing integrated process method for a cationic cotton-like polyester composite filament fabric. Background The comfort, appearance and dyeing and finishing properties of textiles, especially of clothing fabrics, are important research directions in the current textile industry. With the continuous improvement of the demands of consumers on wearing comfort, hygroscopicity and aesthetic effects, the traditional pure polyester filament fabric cannot meet the pursuit of 'cotton feel', 'comfort', 'imitation cotton vision and touch' in the market due to the problems of poor hygroscopicity, hard hand feeling, bright luster and the like. Therefore, the modification of the filament polyester fiber and the dyeing and finishing process of the fabric are studied to realize the appearance and touch of the cotton-like polyester fabric, and the cotton-like polyester fabric becomes a hot spot in textile scientific research and industry. The Chinese patent CN103437103A proposes a dyeing and finishing process for polyester filament super-imitation cotton fabric, wherein the fabric is steamed and preshrinked to make the fiber fluffy, then alkali deweighting treatment is carried out to make the surface part of the polyester fiber corroded by alkali to generate diffuse reflection effect, so that the fabric is soft in luster, the optical characteristics and the hand feeling of the cotton fabric are simulated, and finally the fabric is subjected to post-shaping and drying at a proper temperature to have a moderately soft hand feeling, so that the comfort standard of the cotton fabric is achieved. The processing effect of the technology not only enables the fabric to approach to cotton textiles in appearance and touch sense, but also improves the moisture-conducting quick-drying property, the strength and the antistatic property of the fabric, and has obvious advantages compared with common cotton fabrics. In the technology, alkali deweighting treatment is an important processing mode, and forms a fine rough structure by chemically and selectively corroding the surface of polyester fibers, so that the luster of the polyester fibers is reduced, the softness of hand feeling is improved, and the functions of moisture absorption, sweat release and the like are enhanced. Although the process is widely applied in textile dyeing and finishing engineering, the treatment is generally carried out based on conventional filament fabrics, and the structure and dyeing strategy of the product are not optimized more deeply, so that the double-color layering effect, the consistency among batches and the production efficiency are further improved to a certain extent. On the other hand, in terms of dyeability of fiber bodies, dyeing methods of cationic dyeable polyester fibers and composite fabrics thereof are also attracting attention. As a modified polyester, the cationic dyeable polyester fiber can be selectively adsorbed with the cationic dye in the dyeing and finishing process due to the introduction of active groups capable of being combined with the cationic dye in the molecular chain, so that the dyeing dyeability and the dyeing fastness of the polyester fiber are greatly improved. Related researches show that by adopting a dyeing and finishing scheme combining cationic dye and disperse dye, different fiber components can be dyed in the same bath liquid, so that a double-color or double-color-level dyeing design is realized, and the dyeing and finishing scheme has remarkable advantages in the aspect of improving the color expressive force of products. As in WO2018010356A1, a dyeing process of cationic dyeable polyester/nylon composite fabric is proposed, comprising a stepwise adjustment of pH and temperature to adapt the fixation conditions of different dye systems respectively, but it is mainly focused on the dyeing process design of conventional fabrics. In addition, the existing dyeing and finishing process generally carries out the steps of scouring, preshrinking, dyeing, alkaline treatment, finishing and the like of the fabric in a segmented manner, and has the problems of complex procedures, frequent equipment switching, unstable chromatic aberration, high energy consumption, low production efficiency and the like. Therefore, how to realize continuous pretreatment, sectional selective dyeing, alkali decrement and finishing integrated process of the woven fabric in the same dye bath system so as to achieve stable cotton-like visual effect, good double-color layering performance and higher production efficiency is a technical problem which is not fully solved in the prior art. In summary, the prior art has achieved a certain result in dyeing and finishing of the cotton-like polyester f