Warp-knitted sofa fabrics are mainly velvet, which can be classified according to the way of velvet, including brushed fabric, sheared fabric, split fabric, sanded fabric, and cut fabric. The type that can best highlight the high-speed characteristics of warp knitting is in Product woven on a high-speed tricot machine and then brushed.
Brushed fabric is one of the main products of tricot warp knitting machines. It is mostly produced on tricot warp knitting machines with machine numbers E28 and E32. Generally, 2 to 4 bars are used for weaving. Usually, the velvet yarn is arranged in the front comb. In the finishing process, the fleece floating thread on the back surface of the fabric process is pulled up into loops or broken to form a suede effect through the card clothing of the napping machine. Longitudinal stretching is strong, and the lateral shrinkage of the fabric is relatively large. Common varieties include loop fleece, corduroy, suede, and golden velvet.
Shearing fabric is a kind of suede fabric that obtains the yarn-broken suede effect by shearing warp-knitted terry fabrics by shearing machines. Warp-knitted terry fabrics that are sheared are generally sold in machine numbers E24 and E28. Produced on a tricot machine with terry sinkers, the texture of the fabric is usually formed by a back comb. The back traverse distance or traverse direction is different from that of the pile sinker, so the pile yarn will span the pile sinker and form piles on the edge of the sinker. In this type of sheared pile fabric, the pile yarn is mainly braided chain Weave, the ground yarn is a two-needle warp flat or three-needle warp satin weave, and the loop sinker is moved horizontally by one stitch.
It is also possible to shear the terry fabric knitted on a warp-knitting towel machine or a double-needle bed terry warp knitting machine with a single needle bed. In addition, the shrinkage of the elastic yarn can also be used to make the reverse side of the fabric process more The velvet yarn with long extension thread is looped and then sheared, such as elastic velvet. Compared with other warp-knitted velvet fabrics, sheared fabric has the disadvantage of large loss of velvet yarn due to the need to cut off the loops, so it is currently less used .
The short-pile, medium-long-pile and long-pile fabrics produced by the double-needle bed Raschel warp knitting machine occupy a large proportion in the warp-knitted fleece family, and are mainly produced on the machine with the machine number E22. The 1~2 bars at the front and the back of the machine knit two separate single-jersey fabrics on the front and rear needle beds respectively, and then use the 1~4 velvet bars in the middle to alternately form a fabric on the front and rear needle beds. loop, connect the separated two single-sided fabrics, and finally split the connecting yarn on the slitting machine to form a plush fabric with the same pile height. The height of plush can be adjusted by the distance between them. At present, it is mainly used as Raschel warp knitted cotton blanket, acrylic blanket, faux fur coat fabric, toy plush and car seat fabric, sofa release, etc.
In addition to the above three commonly used raising methods, there are some other raising methods such as: sanding, cutting pile, etc. Sanding refers to breaking the extension line of the coil through the action of abrasive grains on the grinding roller of the grinding machine. Broken yarn suede effect. Cut pile fabric refers to a kind of suede with broken yarn suede effect formed by knitting on a double-needle bed terry warp knitting machine with a circular cutter and a grooved needle in the needle bed. fabric.
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