Carded yarn
Combed yarns are generally high-grade products, requiring a good appearance, even drying, and neat impurities. The combing process can eliminate a large number of short fibers and some impurities, and it is difficult to exclude neps. Therefore, combing cotton requires as low as possible the raw cotton linters and nep, poor maturity, and high tax-inclusive rates. Produce nep, use as little as possible. Because combing products are used for making high-grade fabrics, they require a higher dyeing effect on the cloth surface. Therefore, raw cotton is selected from raw cotton with good color and good uniformity, and long-staple cotton is sometimes required.
Single yarn and strands
Generally, the single yarn adopts a backhand twist and the strands adopt a forward twist. The angle between the fibers in the strand and the strand axis is small, so the utilization rate of the fibers is high, the strength is also greatly enhanced, the strips are improved, and the strips are generally dried. Levels can be increased by 2-3%, hairiness and defects are mostly wrapped in the line, which reduces the chance of exposure to the yarn, so the number of hairiness and flaws is also greatly improved. The use of strands is generally used for warp yarns, so the grade and quality of cotton can be reduced.
Warp and weft
Warp yarns are subjected to more tension and friction in use, so the warp yarns have higher strength requirements. When blending with cotton, the slender fibers should be used, the single fiber strength is high, the maturity is moderate, and the raw cotton with good uniformity is prepared. The weaving process has many opportunities for the removal of neps and impurities on the yarn, and it also needs to go through the sizing process, so the requirements for the color and impurity of the raw cotton are low, the weft yarn is not sized, the preparation process is simple, there is less opportunity to remove impurities, and the weft yarn Exposed on the surface of the fabric, the weft yarns have a great influence on the color, appearance and feel of the fabric, but the weft yarns do not require strong strength. Therefore, raw cotton with good color, less impurities, shorter and slightly less tension can be used.
Knitting yarn
Knitwear is made by weaving a single or multiple yarns with a knitting machine. It has high requirements for yarn breakage, defects, strength and dyeing. Knitting yarns are generally made of underwear and require softness and comfort. Smaller twist, knitted yarns have high requirements on the evenness of the strips, and the yarns with uneven thickness are particularly obvious on the fabrics. Therefore, when the cotton is blended, the strength of the yarns, the dryness, the defects, and the number of broken ends must all be satisfied. Take care of, so should choose the slender fiber, good uniformity, normal maturity, low cashmere rate, less raw cotton, napped fabric knit yarn, should choose good maturity, good elasticity, shorter length of raw cotton .
Dyeing yarn
Generally, cotton fabrics are subjected to post-finishing dyeing. The color-removing ability of fabrics is closely related to the properties of fibers. Light-colored fabrics do not require high-quality raw cotton, but raw cotton with low maturities and large differences cannot be used. Can cause the fiber to mix unevenly, after the fabric dyeing will appear the spot or the strip flower, therefore the light color cloth requests to use the raw cotton which has less impurities, the color is better. Dark-colored fabrics have high requirements for the ability of fibers to absorb color, require a good maturity of raw cotton, the requirements of the printed cloth on the raw cotton can be reduced, because after printing, can cover some of the yarn on the cotton yarn and cross-file, for yarn dyeing yarn, requirements The highest yarn for a colored cloth fabric, also known as Mitengbu, is a dyed yarn that is used to weave high-end decorative or apparel fabrics. Because the yarn is dyed through multiple processes and dyed, the yarn is required to be hairless, yarn free, and free from joints. At present, there are fewer yarns that can achieve high-grade one-color cloth yarns in China.
Special yarn
The types of special yarns are many, such as the curtain yarns for tires, high-grade sewing threads, decorative fabric yarns, and handkerchief yarns, etc. It is required to select cotton according to the quality requirements and must not cause the phenomenon of universal cotton blending.
According to the carding process to divide: combed cotton JC, semi-combed BJ, carding. According to the adding method: Sæ», Zæ». Divided by yarn count: coarse (1-16S), normal (18-36s), high (40s, 60s, 80s, 100s, 120s). According to the degree of twist points: knitting yarn and woven yarn. According to the number of points: single yarn, twisted yarn (two single yarns tied together), strands (three or more single yarns tied together). According to the spinning process: ring spinning and air spinning.
According to spinning process points: ring spinning, air spinning, dust cage spinning and many other. The most common is ring spinning, but the output of air spinning is high, such as OE yarn used on denim, which is air spinning
There are also blended yarns, AB yarns, special coarse yarns, and loop yarns.
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