Polyester DTY (Draw texturing yarn), that is, draw texturing yarn, is a finished yarn that is continuously or simultaneously stretched on a texturing machine and subjected to false twisting and texturing. It can be directly used for weaving, so the dyeing uniformity of DTY directly affects the quality of the finished fabric. Among them, the dyeing rate is one of the important indicators for testing the quality of DTY . The uniformity of dyeing will be directly reflected on the woven fabric. If the dyeing rate is M The lower rate indicates poor dyeing uniformity and more defective dyed yarns, which not only reduces the DTY manufacturer’s excellent rate, but DTY defective dyed yarns will cause hundreds of thousands of meters of The downgrading of fabrics seriously affects the economic benefits of enterprises. Analyzing and solving the causes of poor DTY dyeing can help improve product quality and reduce unnecessary losses.
Morphological characteristics of poor DTY staining
The uniformity of DTY dyeing directly affects the yield of DTY and affects the economic benefits of the manufacturer. The dyeing rate is commonly used in production, and defective silk is determined based on the color depth of the dyed socks and the length of the spots. The main forms of poor staining include the following.
1. F Silk, also known as segmented silk
F silk (segmented silk) is horizontal striped silk (see Figure 1), which refers to stripes with obvious color differences mixed in the dyed garters of the same sample. Extracting the silk sliver and analyzing it found that the network nodes are normally and evenly distributed, and the sliver has intermittent deep color-absorbing sections with varying lengths, indicating that unfavorable factors vary, such as intermittent dark stripes appearing on the fabric.
Postscript
In order to improve the DTY dyeing M rate, it is necessary to consider the polyester, POY spinning process conditions and the DTY production process. , find reasonable control basis and formulate reasonable process conditions.
1. Use PTA raw materials with stable batch numbers, while controlling the contents of TiO2 Yao and diethylene glycol and maintaining stable values to enable DTY dyeing M rate remains at a good level.
2. During the spinning process, select the appropriate cooling air process and clustering position, select the appropriate spinning tension, and maintain the uniformity of oiling, so that a smaller CV value can be obtained, which can make DTY staining M rate is improved.
3. During the DTY production process, reasonable selection of the deformation hot box temperature, production speed, D/Y ratio, draw ratio and other processes can maintain a high dyeing M Rate.
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Postscript
In order to improve the DTY dyeing M rate, it is necessary to consider the polyester, POY spinning process conditions and the DTY production process. , find reasonable control basis and formulate reasonable process conditions.
1. Use PTA raw materials with stable batch numbers, while controlling the contents of TiO2 Yao and diethylene glycol and maintaining stable values to enable DTY dyeing M rate remains at a good level.
2. During the spinning process, select the appropriate cooling air process and clustering position, select the appropriate spinning tension, and maintain the uniformity of oiling, so that a smaller CV value can be obtained, which can make DTY staining M rate is improved.
3. During the DTY production process, reasonable selection of the deformation hot box temperature, production speed, D/Y ratio, draw ratio and other processes can maintain a high dyeing M Rate.
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Postscript
In order to improve the DTY dyeing M rate, it is necessary to consider the polyester, POY spinning process conditions and the DTY production process. , find reasonable control basis and formulate reasonable process conditions.
1. Use PTA raw materials with stable batch numbers, while controlling the contents of TiO2 Yao and diethylene glycol and maintaining stable values to enable DTY dyeing M rate remains at a good level.
2. During the spinning process, select the appropriate cooling air process and clustering position, select the appropriate spinning tension, and maintain the uniformity of oiling, so that a smaller CV value can be obtained, which can make DTY staining M rate is improved.
3. During the DTY production process, reasonable selection of the deformation hot box temperature, production speed, D/Y ratio, draw ratio and other processes can maintain a high dyeing M Rate.
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