How to prevent the production of the willow in water jet weaving

The willow fingers are straight or irregular strips along the warp direction on the cloth surface, and they appear as refraction differences on the weaving cloth. Jingliu is one of the most common and difficult to cure rickets in waterjet weaving mills, and has a negative impact on the quality and economic benefits of the company. Therefore, how to overcome this rickety has always been one of the themes explored in the field of production technology of weaving enterprises.

The main reason for the production of the willow

1, the factors of the original silk

The influence of the raw silk is very complicated, mainly including the unevenness of thickness, the shape of the cross section, the difference in the number of single fibers and the difference in the content of TiO2. In the spinning process, the difference in the actual process technical conditions between each spindle and the difference in ambient temperature and humidity and processing time will cause differences in fiber crystallinity and polymerization degree.

2, weaving processing factors

There are also many factors in the process of weaving the process in the weaving factory, but it can be summarized as three aspects:

First, the difference in tension, the difference in tension causes the elongation between the wires to be different, and the refractive index is different.

Second, the surface of the wire is damaged, resulting in different reflection of the wire or damage to the surface of the wire.

The third is environmental factors. The environment, including temperature, humidity and light, make the physical properties of the wires different. Under the same tension, the degree of deformation is different and the difference of refraction is brought about.

3. Post-staining factors

There are two main points: First, the desizing is not clean, causing the paste to color. Second, the improper dyeing control is caused by the difference in color between the threads.

Solve the measures that Jing Liu should take

1, the original silk aspect

Strengthen the physical properties of the raw silk to determine whether to feed or not. Strictly dye the sample on the cloth head and find the problem in time for adjustment. Under the premise of time, the upper wire can wait for the small axis sample to decide whether to continue the warping.

2, weaving aspects

For weaving production, we must do prevention first, can not wait for problems to occur, and then look back at the reasons. First of all, it is necessary to strengthen the batch number management of the raw silk and the balanced management of the upper row. It is necessary to ensure an equilibrium time of more than 24 hours before the warping is started, so that the original yarn stored under the condition of large difference in temperature and humidity of the environment is subjected to moisture balance. The upper wire also requires the production date interval to be as short as possible and the size of the tube to be uniform. The tension of each process is evenly regulated. And the silk pipe's configuration integrity and clean control, such as the creel tensioner, expansion joints, each tooth, each roller and other guide wire components should be clean and clean.

In short, there are no factors that cause tension unevenness. Thirdly, it is necessary to strengthen the management of temperature and humidity, especially warping creels, and the temperature and humidity of the shaft and weaving site should be equipped with appropriate air conditioning systems (including ventilation and humidification devices according to the actual conditions of the factory and the fiber characteristics of the leading products). Wait). The heald density is reduced as much as possible, and the process parameters of the loom are set to ensure that the water stream cannot impinge on the warp yarn. The slurry should select a slurry with stable performance, good film formation, strong adhesion but low viscosity, and the manufacturer should increase the Tg value of the film to 20 °C or more in the summer.

3. Dyeing processing

It should be noted that the dye with good leveling property should be selected, and the moisturizing time should be extended appropriately to make the gap inside the fiber expand as much as possible to ensure the entry of dye molecules. In addition, leveling agents should be used as appropriate to improve the uniformity of dyeing.