9 types of defects in the printing and dyeing of notes and dyes

Keywords: Singeing Track printing Wax strips Alkaline spot Alkali mud Bad Cotton Spot One dyeing success rate

Printing and dyeing enterprises to improve product quality in order to save energy, a success rate of dyeing, the production of each process must be strictly controlled process, product quality. According to the production of a variety of reasonable production processes, prevention of common defects is critical to the success rate of dyeing . Shade stability indicators dyeing and bleaching quality is directly related to the practice of semi-finished products of dyeing cloth, uniform cloth of fullness, luster, hand flu. Thus practicing each step bleaching process should be ground inspection, so that good penetration of the cloth before and after the same semi-finished good, uniform front and rear sides of whiteness, no residue clean cotton cloth heteroaryl, dead cotton, cotton and other adhesions, desizing clean and consistent. The development process should strive to secure strong tolerance, in order to maximize minimize adverse impacts on the dyeing process, produce customer satisfaction with the quality products. Identify problems dyeing process to take reasonable and effective method of early treatment to avoid unnecessary losses and waste, so as to improve the success rate once stained, produce quality and cheap products. Here stained spot color defects during recurrent problem summarize, and given the appropriate treatment and preventive measures.

1 Singeing and Forming and Processing

In the dyeing process, sometimes there are two or more black folds on the surface of the fabric after the padding and there are hairy white tops next to the black folds . This kind of fold is a singe-folded fold. After this kind of zigzag baking, a white print appears, and after the reduction of color , it is a dark, deep trace. Singeing singeing suriko is due to uneven fabric cloth passes catch bankbook crater, due to the high temperature of the crater formed bankbook burns where the formed due to folds which can not burn, so the next to leave the black bankbook White tops.

To prevent the emergence of singeing bankbook, not the first time singeing bankbook, and to develop a reasonable production process depending on the fabric, for thick pile fabric should be boiled before singeing the fabric into flat singeing reduced singeing machine possibility bankbook, addition is burned off the hair wet cloth drop cloth to prevent high temperatures exacerbated suriko degree.

Suriko found singeing must be pretreated before dyeing if dyeing refurbished, once the temerity to drive the production of dyed black suriko will not be processed. The method of singeing pretreatment refurbished bankbook is as simple as heat setting the wool cloth was then leveled reburn show mordenite to eliminate low alkali singeing bankbook.

2 The formation and treatment of boiled and folded

Common practice to rinse off the sub-high-density polyester fabric and cotton tissue, the formation of scale in the production of steam wash water hardness easily adhere to the guide roller, will form scale production of long grooves, so that guide roller injustice whole, it is easy to play suriko fabric. Production Cache clean up once and found suriko should be found when staining semi-finished products have suriko, should be reasonable process refurbished.

Here are some ways to deal with remnants:

(1) Drifting to cloth if it is not smooth temporary creases or mercerized drying folds , lighter than the direct dyeing does not consider the impact of dyeing, if relatively heavy as long as the predetermined type can dye production.

(2) If there is a clear fold in the cloth, no fabric damage will be formed, and the dyeing machine will be a black fold. If the fold breaks down the fabric, it will be a white fold. For this kind of fold, high-temperature ultra-widening and mercerizing can be used for repair.

(3) bleaching cloth practice to severe death bankbook, and a fold has been formed fabric surface aurora printing, such bankbook processing more difficult, only the future light sanding cloth then ultra high temperature process widening web, the fold Aurora printing is ground flat, then boiled and bleached, and the damaged fabric fibers are expanded and repaired. Finally, the creases are leveled by a high concentration of alkali mercerizing treatment.

Here we emphasize that, for the first refurbished bankbook bankbook to accurately determine the causes is critical, Zhezi different treatment of different methods of prevention in order to avoid unnecessary wastage process. For example, mercerized dried creases are better found, they should be treated in time after discovery, and do not leave the problem before dyeing. If the drying process can play a bankbook is not good when the silk cloth beam falls, so that the drying with a drop cloth spreading fight off the residual heat bankbook ironing, so you can save the setting before dyeing. (Before dyeing given type have several drawbacks: high temperature drop cloth easily formed crease setting off needle bankbook ineffective prone to color sensitive amorphous white side gusset prone to defects like fine styling pre nonwoven fabric staining. increase the rain shadow-stripe fabric noodles, so best not to drift to practice semi-fixed type before dyeing, if necessary require setting temperature should be controlled at 170-180 ℃ for good.)

3 Crawler Printing Formation and Processing

Crawler prints appear more often in heavy fabrics, and are also tracked during dyeing. However, due to the different forms of formation , the appearance after dyeing on the fabric is not the same (black print, white print). Typically we see printed track cluttered zonal black printing crosspiece, which is due to the crawler track printed pile fabric in case of too thick cause the stacking indentation, if this track may be printed lighter do not consider dyeing the plane will not be too obvious, too obvious if this Zhezi long hot heap and re-wash can be removed. But another white striped caterpillar India we may rarely encountered, it is not clear why this track is caused. For the production of a large family known scouring and bleaching safety track box with a saturated steam, superheated steam heating track tank water tank to produce saturated steam by treating the fabric, if the low water level in the water tank track too, the tank will be filled with the track ( 240 ℃ high temperature superheated steam, so that the track plate (roll) temperature will be too high to burn the fabric contact surface formed by dye exclusion IOUs spots, but the more severe streaks Landrace stacking time, once the machine equipment failure time IOUs Spots will be difficult to repair, so I think the white stripe is also caused by crawlers. We will classify it as trackprints.

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