The main aspects affecting the color difference of the left, center, and right of the polyester webbing.
(1) Semi-manufactured quality of semi-finished fabrics The difference in fabric structure, warp and weft density, warping tension and thickness will cause color difference. Due to the difference in the production efficiency of the needle loom machine and the dyeing machine, the green belts produced by different ribbon machine are dyed in the same dyeing machine, and even when different batches of the webbing are dyed in the same dyeing machine, a color difference occurs. In order to minimize the influence of the difference in the quality of the blanks on the color difference of dyeing, it is required that the weaving and dyeing must coordinate and plan the production plan. At the same time, the inventory management of the blanks must be carried out to achieve “first in, first out”.
(2) The machine management baking oven should be regularly inspected and maintained to ensure the normal operation of the heating equipment (such as heat pipes, burners, etc.), normal temperature increase and temperature control. In the actual production process, the air duct in the box and the filter screen should be kept clean. It is very important for the dyeing machine to enter the tape device to adjust the tension of the tape. Before entering the dyeing tank, the tension of the tape must be basically the same, so as to ensure the consistency of the tape rate and ensure the consistency of color. It is also important to control the tension applied by the dyeing machine to the webbing. Since the webbing dyeing machine generally uses the frequency conversion control method to adjust the tension of the entire dyeing machine, it is necessary to ensure that the frequency conversion control signals of each process point are normal, and that the failed devices should be repaired in time.
(3) The compatibility of dyes with dyes has a great influence on the color difference between the front and back of the webbing. When the different formulas produce the same color number, the color difference between the front and back of the webbing is quite different. Generally, sublimation dyes with the same or similar sublimation fastness and type (S, SE, E type) are selected for compatibility, and the dyeing effect is good. In addition, the use of auxiliary agents such as anti-migration agents, penetrating agents, and leveling agents also has a certain effect on the control of the color difference, but it should be used rationally.