Cotton warp knitted underwear is often used only for coarse warp knitting, and most of them are mesh products, which has been changed. The use of combed, singed and knotless cotton yarn has made 28e warp knitted cotton yarn possible. We have seen 80s cotton yarn and 40d Spandex Knitted on 28e tricot warp knitting machine in Germany. And the cotton yarn can be put in the front comb, can also be put in the back comb. Fabrics are used as high-end lingerie. In China, we have mass produced 28e cotton yarn and polyester low elastic yarn interwoven products. The appearance after dyeing is similar to that of denim, which was once named chivalry. The fundamental problem of cotton yarn warp knitting is hairiness. The difficulty has been basically solved by using high noil combed, singed and NEP free yarns. If necessary, we can consider chemical sizing. It seems that warp knitting technicians are not used to it, but in weaving, isn't it normal? Now the new raw material of cotton yarn is wrapping cotton yarn with nylon monofilament. Basically remove the cotton yarn hairiness, and make the product has the corresponding style. But this kind of raw material is expensive and needs to be customized.
2. Simplex women's underwear is made of 32e simplex warp knitting machine (tongue needle or slot needle double needle bed) with nylon filament, two sides of the front coil, soft and smooth, as high-grade underwear.
3. Elastic warp knitted underwear and tights are very popular. They are usually made of nylon and spandex. Powernet, the most famous of them, is produced on Raschel type four bar warp knitting machines marked 28e, 32e or higher. Because the holes of the fabric mesh are difficult to weave with tricot four card machine. Generally, the first two combs are knitted with nylon filament, and the second one is knitted with spandex as weft lining. The amount of spandex filament is 10-12%. This kind of fabric has high two-way elasticity, very comfortable to wear, and has the function of tightening to modify the body shape, so it is widely used in women's underwear. Sardines are also commonly used for elastic women's underwear fabric, whose name must be satin appearance. In general, it has three combs. The first two combs are woven with nylon filament, and the last combs are lined with spandex. The amount of spandex is generally 6-10%. This kind of fabric can also be woven on tricot machine. Elastic warp knitted lingerie is a kind of high-grade fabric, so it has the trend of high machine number. In addition to the common 28e and 32e, 36e and 40e products have been seen.
Warp knitting material for brassiere the edge type warp knitting material with many combs, especially the elastic type, has been widely used in brassiere. Two years ago, a large number of raw materials of elastic lace were used to produce bras in one area, which had a great impact on the original Embroidered Bra. In recent years, the use of double needle bed spaced fabric bra cup has been put on the agenda. In the past, most of the bra cups were made of foam plastics, which were not washable, fragile, and difficult to deal with waste. Now the spacer fabrics with certain thickness and compressed projectile will solve these problems well. The raw materials used for warp knitted underwear fabrics must have good moisture conductivity, so as to keep the underwear dry and comfortable after contacting with human body. In the past, there have been discussions on the use of polypropylene fiber. Now the so-called ultra-fine denier polypropylene fiber, in fact, DPF is about 0.8, which belongs to the fine denier range, and its performance can not satisfy people, so it is difficult to be popularized. At present, some chemical fiber companies, such as Tactel series launched by DuPont, are PA type. Aquato is a trilobal section with good moisture permeability. It is recommended to be used as inner layer and inner layer of sportswear. Diabob is a kind of four channel shape. In addition to good moisture permeability, its products have unique luster, smooth handle and good drapability. Interwoven with spandex for elastic underwear, very ideal. The recently launched Coolmax is PE type, which also has a four channel structure. It has a good function of moisture absorption and drainage, and has the washability of PE. It is a suitable raw material for underwear, sportswear and casual wear. In the interweaving of Coolmax fiber and spandex, it is difficult to dye. Because when the dyeing temperature exceeds 120 ℃, the spandex will be seriously damaged, even broken, and the elastic recovery rate will be greatly lost. In order to dye Coolmax fiber well at 120 ℃, lambergal DSP can be used in recent research.