Dyeing production process of cotton plain cloth

Cotton flat fabric dyeing should go through four processes: pre-treatment, dyeing, finishing, and finished product inspection.

(I) Pre-treatment part.

Stitching, desizing, burning, shaping, bleaching, mercerizing

(B) dyeing part.

Cotton fabric dyeing is now dominated by long car continuous rolling and dyeing, cylinder dyeing is no longer the mainstream.

Dyeing long car is divided into two parts, the front car dyeing, after the car solid color.

Dyeing methods vary according to the choice of dyestuff varieties, dyestuffs are generally reactive, shilling, vulcanization, coating.

(C) Finishing part.

Because the cotton fabric in the pre-treatment and dyeing over a lot of long car, warp lengthening, weft contraction, the feel is also rough, after finishing is to solve these problems:.

Soft and stretched: first soft to improve the feel, and then stretched. The contraction of the weft to pull away, there is a shaping machine can be done in one go.

Pre-shrinkage: pre-shrink the cloth to the production process elongated part of the rubber blanket through the pre-shrinkage machine, the principle of thermal expansion and contraction of the cloth shrinkage to the allowable range of clothing cutting, stretch fabric control in the warp 3%, weft 5%; non-stretch control in the warp 3%, weft 3% on.

Finishing for the requirements of the guests, the general flat cloth weft slope control within 3%. Factories can also be based on their own equipment, but also air soft wash fabrics.

(D) finished product inspection part.

After finishing the end of the cloth after testing the shrinkage rate, color fastness and other guest requirements of the internal indicators, color indicators qualified, you can finished product inspection. General guests are more agreeable to the U.S. four-point standard inspection, inspection of qualified products can be packaged.