Preventing contamination and color staining is a common and difficult problem in production management of printing and dyeing factories. Modern management factories have strengthened scientific management trends and eliminated them. Contamination and staining are a “chronic problem” that plagues dyeing factories. How can dyeing factories completely solve the problem of contamination and staining? This needs to be improved from the management system, and contamination prevention should be taken as a major issue in daily production site management. All employees are required to attach great importance to it ideologically, and must not have the preconceived idea that “a little contamination does not matter”. Whether the contamination and coloring problem can be completely solved also reflects the management level of a dyeing factory.
1. Find the root cause of the problem and seek a complete solution
First find out the process and problems that cause staining and staining. Here are some dyeing factories: Frequently occurring situations:
1. The gray fabric loading and unloading truck and the blank are stained when stored. Some people don’t pay much attention to the contamination of gray fabrics that will bring contamination to dyed finished products. An accidental footprint will still remain on the finished product even after pre-treatment when dyeing light colors, especially white.
2. The dyeing and incoming cloth trucks are not rinsed clean or are dropped on the ground during the transportation of cloth in and out, causing contamination.
3. Contamination and discoloration caused by unclean processing equipment (such as dye vats, auxiliary vats, dehydrators, expanders, dryers, setting machines, etc.) and the working environment.
4. When taking out additives in each process of pre-treatment, dyeing and post-treatment, the inner wall of the barrel is stained with dye that has not been washed away, causing staining.
5. Oil pollution caused by mechanical failure during the dyeing and finishing process.
6. In each process of pre-treatment, dyeing and finishing, the cloth is pulled out after blocking and finishing, and the cloth is accidentally stained.
7. During the storage process after the cloth is released, the plastic film box cover is not covered or not covered properly, and is stained by flying materials from the environment or sewage dripping from the roof.
8. The dyer’s hands were stained with dye (because he was blocking several machines at the same time), and he accidentally got it on some light-colored cloths during operation, causing staining.
2. Take corresponding and effective preventive measures against the above causes of contamination
1. Be careful when loading, unloading and landing the gray cloth in the factory, and take good care of the gray cloth. , to prevent floor contamination.
2. Strengthen the management of blank inventory. Blank cloths should be stacked in a neat and orderly manner to facilitate finding cloths, preparing pots, and taking cloths, and avoid “footprints” contamination caused by random searching. .
3. If stains are found before putting the cloth in, such as bleached cloth or light-colored cloth, it should be washed first and then put into the vat. It is worth mentioning that if “weaving contamination” is discovered during the fabric distribution, sewing and feeding processes, the customer should be informed immediately so that the customer can take measures to avoid similar contamination problems and reduce the “responsibility” of the dyeing factory for this. .
4. Keep the working environment clean and no colored sewage should remain on the floor of the dyeing workshop.
5. When dyeing a dark color vat with a light color, the vat should be washed clean, including the auxiliary vat, filter screen, cloth inlet and outlet window, cloth outlet rack, etc., to prevent staining , stained hair. Dyeers should develop a good habit of changing and rinsing filters frequently.
6. The cloth loading truck should be rinsed and wiped clean when entering and exiting the cloth.
7. When the cloth needs to be removed from the gap due to clogged cloth, pay attention to flushing the pedals and the ground. It is best to use the cloth collected and sorted by the car. Sometimes during the dyeing process, when the cloth is tied or broken and the cloth is punched out, the dyeing residue flies out and splashes onto the gray cloth or finished product stacked next to the vat, causing staining. If the dyer’s hands are stained after arranging the cloth, they should be washed before direct contact with the gray cloth.
8. The bucket for collecting dyes and chemical additives must be rinsed clean.
9. It is strictly prohibited to bring powdery dye into the dyeing workshop to prevent staining caused by flying materials.
10. The dye room and chemical room should not be located upstream of the dyeing workshop or finishing workshop. Prevent the wind from blowing the powdered dye into the workshop, causing the flying materials to be stained. In addition, gray fabrics cannot be stored close to the dye room or chemical room.
11. When dehydrating dark colors to light colors or red, emerald blue, emerald green and other colors that are easy to fade, rinse the inner wall of the dehydrator.
12. Keep the work surface and equipment after finishing clean, and pay attention to the “transition” when drying, drying and setting the color of the dryer and setting machine to prevent staining. When the blanket cylinder is being shaped, lint and flying debris on the blanket must be cleaned regularly.
13. When discharging and storing cloths, they must be strictly covered with plastic film.
14. There is a marked plastic rope tied to the end of the blanket when it is released for shaping. It should be untied and taken out before it can be shaped. Our factory has had several cases where the plastic rope melted during shaping. Lessons from stained cloth.
15. No matter which link you are in, once you find contamination, try to clean it immediately and don’t let it go by chance.
16. Strengthen the operation and management of silicone oil softness to prevent the formation of a kind of special “contamination” that is particularly difficult to clean – silicone spots. Once silicon plaque occurs, the consequences can be disastrous.
17. The packaging bag of the finished cloth should be strong. Contamination due to rupture of packaging bags often occurs. </p
