What should we pay attention to in ribbon dyeing 2?

4. Infrared Pre-drying Temperature Affects the Ribbon. After the pretreatment and pad-dyeing process, the polyester ribbon is usually pre-baked by infrared (line) before entering the dye box to prevent dye migration during the drying process and to avoid dyeing defects such as color difference between the front and the back. When the infrared pre-drying temperature is below 80 C, the color difference between the front and back sides of the ribbon is large, and it is difficult to meet the customer's requirements. When the infrared pre-drying temperature is above 100 C, the color difference between the positive and negative sides of the ribbon is greatly improved. This is due to the fact that when the pre-baking temperature is above 100 C, the moisture of the ribbon evaporates basically, which greatly reduces the possibility of dye migration. Considering the Dyeing Practice and energy consumption, it is more appropriate to control the infrared pre-drying temperature between 100 and 150 C. In production, it is generally decided by the thickness of the strip and the liquid-carrying rate. The higher the liquid-carrying rate of the strip, the higher the infrared pre-drying temperature. In actual production, the color difference between the positive and negative sides of ribbon dyeing can not be controlled only by infrared pre-baking temperature, especially the sensitive color numbers such as coffee and dark green. The good dyeing effect can only be achieved by the combination of anti-swimming agent and other additives.

5. The influence of fixing temperature of baking oven on dyeing. Baking color is an important part of continuous thermosol dyeing. The uniformity of fixing temperature of baking oven plays a key role in controlling the left, middle and right color difference of ribbon. After the polyester ribbon is pre-baked by infrared ray and then enters the oven, it is necessary to ensure the same temperature, otherwise it will produce obvious color difference. The test shows that the temperature difference between left, middle and right of the oven is more than 2 C, and the color of the ribbon changes obviously. Therefore, dyeing production must ensure that the oven temperature is uniform.

6. The influence of moisture content on the color difference between left, middle and right of the ribbon. The polyester filament will be treated by degreasing before dyeing. Before and after dyeing, the ribbon is usually dried, and the uneven surface temperature of the drying barrel will cause the difference of moisture content of the blank ribbon, and serious color difference of the left, middle and right ribbon will be caused. In the dyeing process, in order to avoid the left, middle and right color difference caused by the different moisture content of the blank strip, it is necessary to ensure that the blank strip is thoroughly dried before the dipping pad dye solution, and the drying drum is regularly overhauled.

Changle Reet Trading Co., Ltd is a ribbon manufacturer from 2003, main products cover satin ribbon, grosgrain ribbon and Nylon organza ribbon, elastics, artifical flowers, ribbon bow, personalized ribbon,metallic ribbon, scotch ribbon, gingham ribbon, tartain ribbon, national ribbons and stripes.

Our dyeing dry rub fastness can reach 4.4-5 degree. It is safe to white boxes.