Yarn-dyed fabric production process
Take woven yarn-dyed fabric as an example:
Dyeing yarn
There are basically two ways to dye yarn for yarn-dyed fabrics: package dyeing and hank dyeing.
Traditionally, skein dyeing is used, and there are methods such as vat dyeing and chain rope dyeing. Compared with hank yarn dyeing, cheese yarn dyeing has the advantages of short process flow, less yarn waste, less pollution, low labor intensity, saving time and labor, etc. Weaving
1. Preparation before weaving of woven fabrics
Woven fabric is formed by interweaving warp and weft yarns on a loom. During the weaving process, longitudinal and transverse friction and bending occur repeatedly between warp yarns, between warp and weft yarns, and between warp yarns and various objects on the loom. In order to make the yarn have sufficient strength, wear resistance and elasticity, to ensure that the yarn will not break due to the above-mentioned various destructive forces during the weaving process; in order to reduce yarn defects and improve the smoothness, to ensure that the weaving Production efficiency, to obtain excellent products; in order to increase the package length of the yarn and facilitate continuous production, the warp and weft yarns must be prepared before weaving to improve the process performance of the warp and weft yarns.
1. Winding
The winding process is carried out on the winding machine. Its task is to splice the spun yarn bobbins obtained in the spinning process, so that the yarn can obtain appropriate and uniform tension; in accordance with the specified requirements, inspect and remove yarn defects such as thick details on the yarn , impurities and dust, small and strong knots are formed during the cleaning process; it is rolled into a bobbin with uniform density, sufficient capacity, good shape, and easy unwinding.
2. Warping
Warping is carried out on the warping machine. The task of the warping process is to draw out a piece of yarn from the bobbin on the creel behind the warping machine according to the number of warp yarns specified in the process design, and according to the length and width specified in the design, ensure that the yarn root and The tension between the roots, between the pieces, and between the front and back is uniform. If appropriate, the yarn pieces are wound in parallel into a well-formed warp beam.
3. Sizing
Sizing is a key process in preparation before weaving, and is carried out on the sizing machine. The main task of the sizing process is to improve the weavability of the yarn, and at the same time, wind the sized yarn pieces into a well-shaped weaving beam under the condition of uniform tension, uniform arrangement and uniform winding density. Improving the weavability of yarns is mainly reflected in three aspects: First, enhancement – through sizing, part of the sizing liquid penetrates into the interior of the yarn, reducing the possibility of slippage between fibers inside the yarn, thereby increasing Yarn strength improves the ability to withstand tensile and impact loads. The second is to maintain stretch – during the sizing and drying process, the elasticity and elongation of the yarn are maintained, so as to prevent the yarn from becoming brittle and stiff and increasing the breakage of the yarn during weaving. The third is to reduce friction – during sizing, a part of the slurry is covered on the surface of the yarn to form a layer of sizing film, and the hair on the surface of the yarn is attached to the yarn stem to reduce the friction between the yarns and the friction between the yarns. The friction coefficient between machine parts improves the yarn’s ability to withstand friction.
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