Causes and solutions of problems with dyed fabrics and printed and dyed fabrics

Mar 27,2023


  1 Weaving defects

  Main reasons:

  ② The yarn is poorly sized (light or heavy).

  ④ The repair of the off-machine grey cloth is not complete.

  Solution: Strengthen the repair.

  For woven fabrics and knitted fabrics with 2% weft slant/weft arc, and all fabrics with more than 3% crooked can not be classified as first-class products.

  ① Poor weaving equipment (when the weaving equipment fails, it will cause a lot of downtime, resulting in weft inclination/weft arc)

  ③ Poor finishing (weft inclination/weft arc caused by the operator's irresponsibility during finishing).

  3 The shrinkage rate is large

  Main reasons:

  ② Poor pre-shrinkage equipment.

  4 The feel is not consistent with the standard

  Main reasons:

  ② The raw materials are incorrect.

  Solution: Reorganize/reproduce.

  The color fastness of fabrics (yarn-dyed fabrics and dyed fabrics) cannot be consistent with the requirements

  ① Poor dyeing process.

  ③ Poor sorting after finishing.

  Solution: re-fixing finishing/re-producing fabrics/re-dyeing (dyed cloth is OK)/color repairing (paint scraping/paint dyeing fabrics are OK).

  The style of the fabric is obviously different from the standard sample (bamboo style/segment dyeing style/thickness, etc.).

  ① The raw materials are incorrect (the slub yarn is incorrect/the yarn count is incorrect)

  ③ The post-finishing process is incorrect (when the raw materials and organization are correct, whether the post-finishing process is correct or not will affect the style of the fabric)

  Causes and solutions of printing and dyeing cloth defects (dyeing problems)

  The wrinkles are parallel to each other and flush head and tail.

  Skirt wrinkles mostly occur on fabrics containing chemical fibers, and are not easy to find on the original grey cloth. It only appears after printing and dyeing.

  ① The difference in the performance of the chemical fiber itself or the inconsistency of the high temperature set twist temperature in the textile factory, resulting in different weft shrinkage rates;

  Solution: re-cast the original grey cloth production.

  The wrinkles are connected to the seam head, one or more of different lengths. Some are at one end of the seam head, and some are at both ends of the seam head.

  Solution: Together with the seam head opening and cutting, make the next zero cloth treatment.

  Generally, there are not many strips on the cloth surface, usually straight or oblique strips, with different lengths and widths. The wrinkles produced before printing and dyeing or during the printing and dyeing process are quite different from normal, and the color of the cloth surface is quite different; the color difference of the wrinkles produced during the washing process after printing and dyeing is fixed is small.

  ① There are original wrinkles in the first half of the product before printing and dyeing;

  ③ The preparation is not well done for cleaning.

  4 mercerized wrinkles

  Main reasons:

  ② The tension adjustment of the mercerizer is improper;

  Solution: supplementary production.

  The exposed part of the printing and dyeing fabric is different from the normal color of the cloth surface. Irregular light-colored stops or strips generally appear on the folds of the cloth or on both sides of the cloth web.

  Some printing and dyeing semi-products used for reactive dyes and disperse dyes, alkali on the cloth of the product, or the action of reducing gas in the air affects the fixation of the fabric and the dye, and the exposed part produces a light color profile. Reactive dyes are prone to wind marks.