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CN-117248368-B - Processing method for improving formaldehyde content of tencel A100 fabric

CN117248368BCN 117248368 BCN117248368 BCN 117248368BCN-117248368-B

Abstract

The invention belongs to the technical field of textile finishing, and particularly relates to a processing method for improving formaldehyde content of a tencel A100 fabric. The processing method for improving the formaldehyde content of the tencel A100 fabric comprises the following steps of grey cloth, singeing, desizing, scouring, bleaching, tentering, preshrinking and rolling, wherein the grey cloth contains tencel A100 with the mass content of more than 50%, and the bleaching step comprises the step of adding ethanol into a bleaching steaming box. The tentering process comprises padding bleached fabric with a treatment fluid, wherein the treatment fluid comprises softening agent SMI-62, softening agent TUBINGAL PURE and formaldehyde scavenger FDS. The bleaching finishing process and the tentering treatment liquid are reasonable in component configuration, and have good permeability for more than 50% of the fabric containing the tencel A100. The crosslinked auxiliary agent can be protected to the maximum extent, free formaldehyde is captured, and the formaldehyde content of the fabric is within 30 ppm.

Inventors

  • WANG HUI
  • ZHANG ZHANQI
  • QI YUANZHANG
  • Ge Qinglong
  • SANG LI
  • WANG GUIYAN
  • LI NA
  • GENG FEI

Assignees

  • 鲁丰织染有限公司

Dates

Publication Date
20260512
Application Date
20230920

Claims (7)

  1. 1. The processing method for improving the formaldehyde content of the tencel A100 fabric is characterized by comprising the following steps of: Grey cloth, singeing, desizing, scouring, bleaching, tentering, preshrinking and rolling; the grey cloth contains more than 50% of tencel A100 by mass; The bleaching process comprises the steps of adding ethanol into a bleaching steaming box; The tentering procedure comprises padding bleached fabric with a treatment fluid, wherein the treatment fluid comprises 10-40 g/L of softening agent SMI-62, 20-40 g/L of softening agent TUBINGAL PURE and 20-30 g/L of formaldehyde scavenger FDS, and then drying; The bleaching process comprises the steps of bleaching ethanol concentration in a steaming box of 10-20 mL/L and NaClO 2 -40 g/L; the bleaching process comprises the step of bleaching, wherein the saturated steam temperature in a steaming box is 102-104 ℃.
  2. 2. The processing method for improving formaldehyde content of the tencel A100 fabric according to claim 1 is characterized in that the desizing procedure comprises 2-4 g/L of desizing enzyme, 3-6 g/L of penetrating agent, 1-2 g/L of refining enzyme, and the temperature is 95-98 ℃ and the time is 15-20 min.
  3. 3. The processing method for improving formaldehyde content of the tencel A100 fabric according to claim 1, wherein the scouring process comprises 10-20 g/L of NaOH, 2-4 g/L of refining agent, 4-6 g/L of penetrating agent, 3-5 g/L of chelating agent, and the temperature is 100-102 ℃ for 20-25 min.
  4. 4. The processing method for improving formaldehyde content of the tencel A100 fabric according to claim 1, wherein the padding residual rate is 60-65%.
  5. 5. The processing method for improving formaldehyde content of the tencel A100 fabric according to claim 1, wherein the drying temperature is 120-130 ℃ and the drying time is 30-60 s.
  6. 6. The process for improving formaldehyde content of a tencel a100 fabric of claim 1, wherein the concentration of ethanol is 95wt.%.
  7. 7. The processing method for improving formaldehyde content of the tencel A100 fabric according to claim 1, wherein the bleaching process time is 20-30 min.

Description

Processing method for improving formaldehyde content of tencel A100 fabric Technical Field The invention belongs to the technical field of textile finishing, and particularly relates to a processing method for improving formaldehyde content of a tencel A100 fabric. Background In order to improve fibrillation of tencel fibers in the market, a method for introducing a cross-linking agent in a fiber production process is adopted by manufacturers of tencel fibers to carry out cross-linking on the surfaces of the fibers so as to attach hairiness. The crosslinking reaction is easy to break under the acid and alkali conditions in the subsequent finishing process, so that fibrillation is regenerated and a large amount of formaldehyde is released. After the fabric containing the crosslinked tencel is made into clothing, the fabric is easy to cause itching due to the fact that the formaldehyde content exceeds the standard, and causes a certain harm to the body. At present, most dyeing enterprises make the formaldehyde detection index of the finished fabric product lower than 75ppm through a full water washing mode, but the formaldehyde release of the fabric in the taking process cannot be ensured, and the harm to human bodies is caused. Patent CN104562688a discloses a preparation method of environment-friendly textile for reducing formaldehyde, wherein polyol is added into finishing liquid to reduce the formaldehyde emission to below 400ppm, but the formaldehyde emission is still too high to meet the standard. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the processing method for improving the formaldehyde content of the tencel-containing A100 fabric, and the special processing technology is adopted to ensure that the formaldehyde and formaldehyde release of the finished fabric product are far lower than 75ppm standard, the free formaldehyde and the formaldehyde release content are both within 30ppm, so that the safety and environmental protection performance of the fabric are improved. The processing technology is convenient and fast, the quality is stable, the energy-saving and environment-friendly development concept at the present stage is met, and the method has good popularization prospect. The processing method for improving the formaldehyde content of the tencel A100 fabric comprises the following steps: Grey cloth, singeing, desizing, scouring, bleaching, tentering, preshrinking and rolling; the grey cloth contains more than 50% of tencel A100 by mass; And the bleaching process is to add ethanol into a bleaching steaming box. The desizing process comprises 2-4 g/L of desizing enzyme, 3-6 g/L of penetrating agent, 1-2 g/L of refining enzyme, and 15-20 min of temperature of 95-98 ℃. The scouring process comprises 10-20 g/L of NaOH, 2-4 g/L of refining agent, 4-6 g/L of penetrating agent, 3-5 g/L of chelating agent, and 20-25 min at the temperature of 100-102 ℃. The tentering process comprises the steps of padding bleached fabric with a treatment fluid, wherein the treatment fluid comprises 10-40 g/L of softening agent SMI-62, 20-40 g/L of softening agent TUBINGAL PURE and 20-30 g/L of formaldehyde scavenger FDS, and the treatment fluid is obtained by fully dissolving the components in water and uniformly mixing the components, and then drying the mixture. The padding residual rate of the padding is 60-65%. The temperature of the drying is 120-130 ℃ and the time is 30-60 s. The concentration of ethanol was 95wt.%. The bleaching process comprises the steps of enabling the concentration of ethanol in a bleaching steaming box to be 10-20 mL/L and enabling NaClO 2 to be 35-40 g/L. The bleaching process comprises the step of bleaching, wherein the saturated steam temperature in a steaming box is 102-104 ℃. The bleaching process time is 20-30 min. Compared with the prior art, the invention has the following beneficial effects: (1) The bleaching finishing process and the tentering treatment liquid are reasonable in component configuration, and have good permeability for more than 50% of the fabric containing the tencel A100. The crosslinked auxiliary agent can be protected to the maximum extent, free formaldehyde is captured, and the formaldehyde content of the fabric is far lower than 75ppm and is within 30 ppm. (2) The invention not only can protect the existing crosslinking reaction on the fiber, but also can lead the fabric to have lower formaldehyde content, thereby greatly improving the wearing safety performance of the fabric. Detailed Description The present invention is further illustrated by the following examples, but the scope of the present invention is not limited thereto. All materials used in the examples are commercially available, except as specified. Ethanol purchased from Zibolan chemical industry Co., ltd, concentration 95wt.%; soft agents SMI-62 were purchased from Bo Lu Rui fine chemical Co., ltd; Softening agent TUBINGAL PURE was purchased from C