Chapter TPU ring rolling

The reasons why the ribbon is bent are as follows: 1. Uneven wear of the reed, 2. Uneven drawing of the coil, 3. Wrong position of the reed, 4. Wrong way of yarn connection

Precautions: 1. The reed must be threaded according to the regular way, 1 group or 2 groups. 2. The larger and looser side should be pulled away until it is as flat as the other side or less than 1-5 turns. 3. The reed is generally within the distance from the knitting needle, and the reed can be as far as one reed is free. 4, according to the needs of the ribbon, the upper and lower levels, or points, about the connection, generally points up and down, if there are two or more methods on a belt or grain, separate connection.

The pressure of the cylinder at both ends of the dyeing tank roller is large or small. Ribbon continuation of hot - melt dyeing machine rolling car popular use of pneumatic pressure, roll on both sides of a cylinder. When the rolling car running for a period of time, because of the effect of water in compressed air, the pressure at both ends of the cylinder will be different, resulting in blank belt liquid rate is not even, the color difference in the edge. In addition, the rolling mill roll pressure at both ends, the inevitable deflection, the formation of the edge of the rolling surplus, will also form the left center right color difference.

Sew the cloth into tube shape. Divide the cloth and elastic into two equal parts. Use the needle firmly in the middle. Sew the elastic belt on the edge of the cloth with Z shape, then fold the elastic belt into the inside, sew a straight line, remember to pull the cloth straight when sewing. This is the same as the second method, except that the last line is sewn with a thin elastic band. Gently wrap the jacquard elastic around the shuttle in the same manner as the bottom line. Sew the jacquard elastic bottom line on the opposite side of the cloth. This is what the last picture looks like.

Effect of curing temperature on hair color in baking oven. Baking color is the main component of continuous thermal-soluble dyeing, and the average temperature of baking oven fixation plays a key role in controlling the color difference between left, middle and right. After the polyester ribbon is pre-baked by infrared ray and then put into the oven, make sure the temperature is not right, otherwise clear color difference will occur. The test indicated that the temperature difference between left, middle and right of the oven exceeded 2℃, and the color of the woven ribbon changed clearly. Therefore, it is necessary to ensure that the oven temperature is even when dyeing.

The influence of moisture content on the left, middle and right color difference of weaving belt. Polyester filament yarn in the spinning process will participate in the necessary oil, so the dyeing before the oil treatment. Woven ribbon dyeing before the treatment of popular stop drying, and drying cylinder appearance temperature will form the difference in moisture content of the blank belt, serious when the formation of ribbon left right color difference. In the process of dyeing cost, in order to prevent the color difference between left, middle and right due to the difference in moisture content of the blank strip, it is necessary to ensure that the blank strip is completely dried before the dip dyeing solution, and stop the current inspection of the drying cylinder.