Activity Technology Of Spandex Printed Fabric

The operation steps of the active technology are as follows: first, mix the starch ether slurry and sodium alginate slurry according to the prescription, add six sodium partial phosphate, salt and water, stir 30 ~ 60min.

Add soda powder and white powder to uniform.

The prepared dilute pulp was quantitatively analyzed by iodine solution titration and recorded.

For mixing correctly when mixing.

According to the needs of factories, various factories have formulated several kinds of diluted pulp with different proportions, creating convenient conditions for making printing process paste.

If neutral whiten is used, the dosage of soda in the prescription can be reduced to 2%.

Pure cotton knitwear VAT whitening paste formulation is used for carving the bottom color. The white pulp of bottom pulp can ensure the whiteness. Because both starch and sodium alginate contain yellow pigment. This will affect the whiteness of the undercut. The white pulp will get the desired effect. However, many printing factories have not cooked the pot now, so if the starch ether or sodium alginate is used directly, the whiteness of the white pulp will not be achieved. The whitening agent in the white pulp must be a reducing agent and electrolyte.

The specific printing process has been elaborated in the previous article on the production practice of reactive dyes printing and discharge process for pure cotton knitwear, which is not repeated here.

In order to control the drying room temperature strictly, we must also consider the high temperature to restore the vat dyes early and affect the hair color.

The process of printing and printing with steaming and long drying will cause the first part of the dye exposed to the air to oxidize first, resulting in permanent color difference. For the smooth printing process of polyester fabric, although there is a paste with high solid content, it is also impossible to exclude the possibility that the pulp layer is easy to drag.

After washing cloth, it can not be extruded, and Spandex Knitted Fabric washes more carefully than ordinary knitted fabric.

Rope like cylinder drawing is the most traditional washing equipment. It is more suitable for washing knitted fabrics. However, in the process of carving and printing, the flat width knitted fabric can easily expand the size of the fabric, wash the alkali agent on the fabric and part of the floating color and enter the rope soaping or reducing cleaning process.

The width of the Spandex Knitted fabric after water washing is much smaller than that of the finished product. A soft setting on the shaping machine often fails to meet the expected requirements. It needs to be dried in a loose dryer, so that it is naturally precompressed and then overfed, and the high setting temperature not only makes the noodles yellowing or makes some softeners yellowing, but also makes the spandex lose some elasticity and produce bad effects.

The rotary screen printing process of Spandex Knitted fabric, especially the discharge printing process, has always been a production restricted area, which is related to the improper process from the processing of color manuscript to the printing process, and the problems of dimensional stability, twist and skew are followed.

Through our practice, this problem has been solved now. The rotary screen printing machine can produce elastic knitted fabric containing spandex.

In the process of manufacturing, the most important thing is to grasp the wrinkles that are not produced in each process.

The requirements for the quality, width, shrinkage and twist of the knitted fabrics containing spandex knitted fabric must be satisfied from the precondition.

Otherwise, the same weaving specifications will produce different mass, width, shrinkage and twist due to different processing methods.

The width control and temperature and velocity of predetermined shape play a decisive role.