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CN-121381411-B - Short-process dyeing and finishing process for polyester-cotton school uniform fabric

CN121381411BCN 121381411 BCN121381411 BCN 121381411BCN-121381411-B

Abstract

The application relates to the field of dyeing and finishing processes of textiles, and particularly discloses a dyeing and finishing process of polyester-cotton school uniform fabric with a short process, which comprises the following steps of S1, adding enzyme and glacial acetic acid into knitted double-sided fabric for enzyme treatment, and obtaining a pretreated fabric without washing the fabric and draining liquid; S2, adding dyeing auxiliary agent and water into the pretreated cloth, adding acid to adjust pH, adding dye to carry out dyeing treatment, refining to obtain dyed cloth, and S3, carrying out reduction cleaning and washing on the dyed cloth, and drying to obtain the finished fabric.

Inventors

  • CHEN FANYI
  • LI ZHENZHUO

Assignees

  • 通亿（泉州）轻工有限公司

Dates

Publication Date
20260508
Application Date
20251226

Claims (5)

  1. 1. A dyeing and finishing process of a short-flow polyester-cotton school uniform fabric is characterized by comprising the following steps of: S1, soaking double sides to be treated in polyethylene glycol composite liquid, carrying out pressurizing treatment, taking out double sides to be treated, heating to 60-65 ℃ and completing pretreatment to obtain knitted double sides, adding enzyme and glacial acetic acid into the knitted double sides to carry out enzyme treatment, and carrying out no washing and no liquid discharging to obtain pretreated fabrics, wherein the polyethylene glycol composite liquid consists of polyethylene glycol aqueous solution with the mass ratio of 20:1-3:1-3, polycaprolactone modified nanocellulose and carrier polymethyl methacrylate, the polycaprolactone modified nanocellulose is prepared by adopting the following method that a cetylether hard alcohol solution is uniformly sprayed in the nanocellulose, polycaprolactone is added, and uniformly mixed and stirred to obtain polycaprolactone modified nanocellulose, the mass ratio of the nanocellulose, the cetylether hard alcohol solution to the polycaprolactone is 1:0.2-0.3:0.2-0.3, the carrier polymethyl methacrylate is prepared by adopting the following method that pentaerythritol ester liquid is uniformly hydrogenated on the surface of the polymethyl methacrylate for two times, the hydrogenated pentaerythritol ester liquid and the polymethyl methacrylate are uniformly dispersed on the surface, the hydrogenated pentaerythritol ester is 1:1-2/L-3, and the amino-2 g of an amino-2-3 g dye is obtained by using a dye aid of a micro-3L dye; s2, adding a dyeing auxiliary agent and water into the pretreated cloth, adding acid to adjust pH, adding dye to carry out dyeing treatment, and refining to obtain dyed cloth; S3, carrying out reduction cleaning and cloth washing on the dyed cloth, and drying to obtain the finished fabric.
  2. 2. The dyeing and finishing process of short-process polyester-cotton school wear fabric according to claim 1, wherein the S1 enzyme is neutral cellulase, the enzyme treatment temperature is 50-55 ℃ and the enzyme treatment time is 45-60min.
  3. 3. The dyeing and finishing process of the short-process polyester-cotton school uniform fabric according to claim 1, wherein the S2 is added with acid to adjust the pH value to 4-5, and the operation is carried out for 8-12min.
  4. 4. The dyeing and finishing process of the short-process polyester-cotton school uniform fabric according to claim 1, wherein the S2 dyeing treatment specifically comprises the steps of treating for 30-50min at 120-135 ℃ and then cooling to 72-80 ℃ at a cooling rate of 1.5-2 ℃ per min.
  5. 5. The process for dyeing and finishing a short-process polyester-cotton school uniform according to claim 1, wherein the dye is a disperse dye with an owf of 1-1.4%.

Description

Short-process dyeing and finishing process for polyester-cotton school uniform fabric Technical Field The application relates to the field of dyeing and finishing processes of textiles, in particular to a dyeing and finishing process of a polyester-cotton school uniform fabric with a short flow. Background The polyester-cotton knitted double-sided fabric is one of main school wear fabrics, and the polyester-cotton school wear fabric has high quality, long dyeing and finishing production process of the original polyester-cotton double-sided fabric, and large consumption and unstable quality. The polyester cotton knitted double-sided fabric has one side containing polyester and one side being cotton, one part of school clothes requiring single dyeing polyester, the cotton side being the color after cotton pretreatment, the polyester cotton being polyester dyeing, without short fiber bare fiber of cotton leaking on the polyester cotton, the common process is that after pretreatment oxygen bleaching, the fiber enzyme is used for eliminating wool and then dyeing the polyester, three steps of three-stage treatment prolong the treatment time, and the treatment time is increased. Therefore, how to develop a high-efficiency dyeing and finishing process, which can shorten the processing time and improve the working efficiency of preparing the filter cotton school wear fabric, is a problem to be solved urgently. Disclosure of Invention In order to prepare the high-efficiency dyeing and finishing process, the application provides the dyeing and finishing process for the polyester cotton school uniform fabric with short flow, which can shorten the treatment time and improve the working efficiency of preparing the filter cotton school uniform fabric. The application provides a dyeing and finishing process of a short-flow polyester-cotton school uniform fabric, which adopts the following technical scheme: A dyeing and finishing process of a short-flow polyester-cotton school uniform fabric comprises the following steps: S1, adding enzyme and glacial acetic acid into knitted double-sided cloth to perform enzyme treatment, and obtaining a pretreated fabric without washing the cloth and draining liquid; s2, adding a dyeing auxiliary agent and water into the pretreated cloth, adding acid to adjust pH, adding dye to carry out dyeing treatment, and refining to obtain dyed cloth; S3, carrying out reduction cleaning and cloth washing on the dyed cloth, and drying to obtain the finished fabric. By adopting the technical scheme, the knitted double-sided fabric is of a structure with one cotton fiber side and one polyester fiber side, the knitted double-sided fabric is firstly contacted with enzyme and glacial acetic acid for enzyme treatment, hairiness and fluff on the surface of the cotton fiber are removed, the surface of the fabric is smoother and clear in texture, the glacial acetic acid can also adjust the subsequent dyeing effect, the obtained pretreated fabric is not washed by water and directly contacts with dyeing auxiliary agents and dyes, the dyeing and finishing process efficiency is improved, the dyeing effect of the dyes on the knitted double-sided fabric is ensured while the processing time is shortened, the problem that excessive loss of polyester strength is not caused by overlong high-temperature dyeing time is solved, and finally the steps are saved by refining, reduction cleaning and the like, so that the quality of the finished fabric is also ensured. Preferably, the S1 enzyme is neutral cellulase, and the enzyme treatment temperature is 50-55 ℃ and the enzyme treatment time is 45-60min. By adopting the technical scheme, the neutral cellulase hydrolyzes beta-1, 4 glycosidic bonds gradually from the tail end of a cotton fiber molecular chain, removes an amorphous region on the surface of cotton fiber, reduces the fiber crystallinity, limits the enzyme treatment temperature and time, can further remove fluff on the surface of the knitted double-sided fabric, ensures soft touch feeling of the fabric, and proves the quality of the finished fabric. Preferably, the pH value of the S2 is adjusted to 4-5 by adding acid, and the operation is performed for 8-12min. Through adopting above-mentioned technical scheme, under acidic environment, can keep disperse dye granule suspension state, prevent the gathering to avoid polyester ester bond to hydrolyze, prevent fiber damage ‌, guarantee the dyestuff simultaneously to the diffusion of county commission inside and fixation, ensure the homogeneity of dyeing. Preferably, the S2 dyeing treatment specifically comprises the steps of treating for 30-50min at 120-135 ℃ and then cooling to 72-80 ℃ at a cooling rate of 1.5-2 ℃ per min. By adopting the technical scheme, the polyester fiber is structurally relaxed at high temperature, disperse dye molecules can be diffused into the fiber, the dye is ensured to be fully permeated and fixed in the fiber through the combination of hydrog