Views: 8 Author: Site Editor Publish Time: 2021-10-29 Origin: Site
1. Paraffin wax: the phenomenon of wax filaments and wax spots (the emulsified melted paraffin has little effect) will cause rejection of dyeing in the back.
2. Silicone oil: The proportion of silicone oil in the slurry is too large, which will affect the quality of scouring and bleaching.
3. PVA and other chemical pulps: The selection of PVA pulp is not standardized, and some PVA pulps are difficult to remove before printing and dyeing. Affect the feel, color and fastness of dyed fabrics.
4. Mildew spots: In the rainy season, the air is more humid. Cotton cloth is susceptible to damp and mildew. The mildewed cloth will be defective after printing and dyeing. Unless the degree is very light, it is not visible on the surface, but the strength decreases with the degree of mildew. It is best to add some preservatives when sizing, but improper addition of preservatives will cause environmental problems if the entire dyeing and finishing process is not handled cleanly.
The quality of the edge structure has a great impact on the printing and dyeing process, mainly causing wrinkles, curling, and gaps.
1. Rotten edges and tight edges:
The skein yarn used for the seaming is broken. Tight edges, etc. are easy to cause gaps in the printing and dyeing process, resulting in wrinkles and even cloth breaks during production.
2. Unreasonable local organization and side organization
Improper adjustment of tightness can cause defects such as hemming: especially for straight tributes in stretch fabrics, it is best to widen the selvage of twill fabrics by 1.5 to 2cm, and appropriately add reinforcing ribs. Special specifications are particularly prone to curling fabrics that can be woven with more than two reinforcing ribs (commonly known as tank edges), and the tightness of the edge organization is slow and excessive to achieve the best anti-curling effect.
3. The left and right chromatic aberration caused by the organization
When this kind of fabric goes to the dyeing assembly line of the printing and dyeing factory, the color difference between left and right is frequently adjusted due to the mixing and turning of the cloth together, resulting in serious left and right difference of the finished product, which seriously affects the quality of the product. The reason for this may be that the air-feeding of the air-jet loom makes the yarn untwisted, causing the yarn twists on the inlet side and the outlet side to be inconsistent, causing the color absorption rate of the two sides to be different, resulting in color difference. It is recommended that weaving mills with such complaints mark the edges of the cloth. Such as adding a colored yarn to the import side. The printing and dyeing factory recognizes the edge and turns the cloth and then uses the adjustment function of the even rolling car to solve the problem.
1. Inconsistent warp tension can easily cause rain ribbons, and stretch fabrics can cause inconsistent door widths.
2. The rust on the reed on the machine may cause local sporadic small oxidized holes in the printing and dyeing process.
3. When considering the weight design of elastic fabrics, the weight is increased by adding warp density. Sometimes the warp density is too large to affect the weft processing coefficient and cause the width of the door to be too wide.
4. Edge rejection: Because the edge structure is prone to problems, wax is often applied near the edge during weaving to increase slippage, which will cause rejection defects during low-temperature dyeing.
5. Sparse and dense files, yellow and white files: This reflects the weaving and yarn management level of the weaving factory. After dyeing, it forms obvious shades, which are more obvious when used in blue, gray, grass green and other colors. The yellow-brown series is slightly better.
The blending ratio must meet the customer's requirements. It is not visible on the surface when the same color is used, and it will be exposed when testing the composition. When doing special dark single dyeing, the content of this component is insufficient and the color cannot be improved. Product design should consider the feasibility of printing and dyeing processing. When multi-fiber functions are superimposed, it is necessary to consider the difficulty of printing and dyeing processing and whether the printing and dyeing processing will damage the fiber functionality. The nylon yarn raw material used in the cotton-nylon fabric must be a batch number to avoid the phenomenon of inconsistent dyeing shades.
The above situation is limited to the frequent problems encountered by surrounding enterprises. Because the processing varieties of each printing and dyeing enterprise are different, the production conditions and the environment are different, and the requirements for upstream textile enterprises are also different, which requires upstream and downstream enterprises to maintain Regular communication in order to improve each other, improve together, and form a win-win situation.
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