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CN-121992672-A - Printed acrylic fabric and production process thereof

CN121992672ACN 121992672 ACN121992672 ACN 121992672ACN-121992672-A

Abstract

The invention relates to a novel printed acrylic fabric and a production process thereof, comprising the following steps: pulp preparation, printing, drying, steaming, water washing and shaping. Compared with the prior art, the method is characterized in that the acrylic fabric is steamed after being printed. Under the steaming damp-heat condition, the acrylic fiber is puffed, and the positively charged dye ions are strongly and quantitatively combined with the negatively charged fiber acid groups through ionic bonds, so that the cationic dye diffuses into the fiber to be combined and cured with the acid groups, thereby meeting the requirement of color fastness.

Inventors

  • WU ZIWEI

Assignees

  • 福建华峰新材料有限公司

Dates

Publication Date
20260508
Application Date
20251229

Claims (10)

  1. 1. The production process of the printed acrylic fabric is characterized by comprising the following steps of: the preparation method comprises mixing soft water and modified starch to obtain starch paste, adding tartaric acid, glacial acetic acid and glycerol into the starch paste while stirring to obtain modified starch paste with viscosity of 8000-10000 CPS; printing, namely printing the acrylic fabric with printing paste to obtain printed fabric; drying, namely drying the printed fabric to obtain a dried fabric; steaming, namely steaming the dried fabric for 20-30min by using 102-105 ℃ saturated steam to obtain the steamed fabric; Washing, namely washing the steamed fabric to obtain a washed fabric; and (3) shaping, namely drying the washed fabric, and performing heat shaping to obtain the printed acrylic fabric.
  2. 2. The process according to claim 1, wherein the sizing step comprises 80-85% modified starch slurry, 0-6% cationic dye, and the balance soft water.
  3. 3. The process according to claim 1, wherein the modified starch slurry comprises 10-15% modified aleurone, 0.8-1% tartaric acid, 0.8-1% glacial acetic acid, 4-5% glycerol, and the balance soft water.
  4. 4. The process according to claim 1, wherein the printing step is performed by rotary screen printing.
  5. 5. The process according to claim 4, wherein the printing step is carried out at a speed of 20-30M/min.
  6. 6. The process according to claim 1, wherein the drying step is carried out at a drying temperature of 120-130 ℃.
  7. 7. The production process according to claim 1, wherein the washing step comprises cold water washing, hot water washing, clean water washing, and dehydration drying in this order.
  8. 8. The production process according to claim 7, wherein the concentration of the soaping agent is 2g/L, the washing time is 8-12min, the washing is 2 times, the concentration of the soaping agent is 2g/L, the washing is 15-20 min at 60 ℃, the washing is 2 times, and the washing time of the washing is 3-5min, the washing is 1 time.
  9. 9. The process according to claim 1, wherein the shaping step is carried out at a heat-shaping temperature of 130-140 ℃.
  10. 10. A printed acrylic fabric, characterized in that it is produced by the production process according to any one of claims 1 to 9.

Description

Printed acrylic fabric and production process thereof Technical Field The invention relates to the textile field, in particular to a printed acrylic fabric and a production process thereof. Background Acrylic is an important synthetic fiber, which is known as "artificial wool" because of its properties similar to wool. Because acrylic fibers incorporate negatively charged acid groups (known as "dye holders") during the manufacturing process, cationic dyes are used primarily for dyeing. The cationic dye ionizes in water to produce positively charged pigment cations. In the dye bath, the two are combined through ionic bonds, so that the purpose of dyeing is achieved. At the same time, dye molecules can also enter the amorphous regions of the fiber by van der Waals forces. Acrylic has an important temperature parameter, called the glass transition temperature, which is typically between 75 and 85 ℃. When the temperature is lower than Tg, the fiber molecular chain segment is frozen, the dye is hard to enter the fiber, and when the temperature exceeds Tg, the fiber macromolecular chain segment starts to move violently, the micro gap is increased instantaneously, and the dye can be diffused into the fiber rapidly. If the temperature rises too fast, the dye can fully rush into the fiber in a very short time, the diffusion speed of the dye cannot catch up with the adsorption speed, the surface of the fiber can be instantly full of the dye, the inside of the fiber is not colored, so that "color patterns" (uneven dyeing) are caused, and once the cationic dye is combined with the fiber, the cationic dye is difficult to desorb again. Therefore, once the temperature rises too fast around Tg, resulting in a color bloom, it is difficult to repair later by an extended time. Therefore, in the acrylic fiber dyeing, the heating speed needs to be strictly controlled, and the condition of color bloom is avoided. The dyeing control requires longer time and more precise time control, and has higher requirements on dyeing equipment. Disclosure of Invention In view of the above problems, the application provides a novel printed acrylic fabric and a production process thereof, which can achieve dyeing of acrylic fibers and color fastness requirements by a simple steaming mode. The first aspect of the application provides a production process of printed acrylic fabric, which comprises the following steps: the preparation method comprises mixing soft water and modified starch to obtain starch paste, adding tartaric acid, glacial acetic acid and glycerol into the starch paste while stirring to obtain modified starch paste with viscosity of 8000-10000 CPS; printing, namely printing the acrylic fabric with printing paste to obtain printed fabric; Drying, namely drying the printed fabric, removing moisture and preventing pattern infiltration to obtain a dried fabric; steaming, namely steaming the dried fabric for 20-30min by using 102-105 ℃ saturated steam to obtain the steamed fabric; Washing, namely washing the steamed fabric to obtain a washed fabric; and (3) shaping, namely drying the washed fabric, and performing heat shaping to obtain the printed acrylic fabric. Compared with the prior art, the technical scheme is used for steaming the acrylic fabric after printing. Under the steaming damp-heat condition, the acrylic fiber is puffed, and the positively charged dye ions are strongly and quantitatively combined with the negatively charged fiber acid groups through ionic bonds, so that the cationic dye diffuses into the fiber to be combined and cured with the acid groups, thereby meeting the requirement of color fastness. Further, the printing paste contains 80-85% of modified starch paste, 0-6% of dye and the balance of soft water. Further, the modified starch slurry contains 10-15% of modified starch powder, 0.8-1% of tartaric acid, 0.8-1% of glacial acetic acid, 4-5% of glycerol and the balance of soft water. Further, in the printing step, a rotary screen printing mode is adopted for printing. Further, in the printing step, the speed of the vehicle is 20-30M/min. Further, in the drying step, the drying temperature is 120-130 ℃. Further, in the steaming step, the dried fabric is steamed for 20-30min by using 102-105 ℃ saturated steam. Further, the water washing step sequentially comprises cold water soaping, hot water soaping, clean water washing, dehydration and drying. Further, the concentration of the cold water soaping agent is 2g/L, the cleaning time is 8-12min, the washing is 2 times, the concentration of the hot water soaping agent is 2g/L, the soaping is carried out for 15-20 min at 60 ℃, the washing is 2 times, and the cleaning time of the clean water washing is 3-5min, and the washing is 1 time. Further, the heat setting temperature in the setting step is 130-140 ℃. The second aspect of the application provides a printed acrylic fabric which is produced by adopting the production process of the first aspect of the applicati