Factors affecting the color difference between the left, middle and right of polyester webbing dyeing
(1) The quality of the blank belt semi-finished product, the fabric structure, the warp and weft density, the warping tension, and the thickness of the polyester webbing will cause dyeing color differences. Because of the difference in the output power of looms and dyeing machines, the belts produced by different looms are dyed in the same dyeing machine, and even different batches of ribbons are dyed in the same dyeing machine. In order to minimize the impact of the quality of the blank belt on the color difference of dyeing, it is necessary to coordinate the weaving and dyeing, coordinate the production plan, and do a good job in the inventory management of the blank belt, and try to achieve “first in, first out”.
(2) Machine management The oven should be regularly repaired and maintained by the webbing manufacturer to ensure the normal operation of heating equipment (such as heating tubes, burners, etc.), and normal heating and temperature control. In the actual production process, we must insist on dredging the air duct in the box and cleaning the filter screen. The dyeing machine’s belt-in equipment is very important to adjust the tension of the blank belt. The tension of the blank belt before entering the dyeing tank must be basically the same in order to ensure the commonness of its liquid rate, and then the commonality of colors. The tension exerted by the dyeing machine on the webbing is also important. Because webbing dyeing machines usually use frequency conversion control to adjust the tension of all the dyeing machines, it is necessary to ensure the normal frequency control signals of each process point, and timely repair of malfunctioning equipment.
(3) The selection of the compatibility of dyestuffs and dyes has a greater influence on the chromatic aberration of the front and back sides of the webbing. When different formulas produce the same color number, the color difference between the front and back of the webbing is quite different. Usually choose to improve the fastness and type (S, SE, E) the same or similar disperse dyes for compatibility, the dyeing effect is better. In addition, the auxiliary use of anti-migration agents, penetrants and leveling agents, etc., also has a certain effect on the control of dyeing color difference, but it needs to be used rationally.