As the saying goes, “doing one thing and loving one's line†requires the industry to do well and do a good job. This is actually not simple. It requires a strong interest and solid basic knowledge is the most important thing. A good salesman not only can play a good job in the work of communication, professional knowledge has a solid foundation, but also for the salesman's comprehensive ability a lot of points. Although professional basic knowledge is important, most things will be ignored or forgotten. The types of products are not familiar with, the specifications are too many do not understand, the advantages and disadvantages of various types of products are not clear, there are product quality problems can not analyze the reasons, etc., are the most direct consequences of not knowing the basic knowledge of the professional. Therefore, understanding and in-depth knowledge of professional basics is particularly important for every salesperson. Cotton and spandex form spandex core-spun yarn. Spandex (alias: polyurethane fiber), spandex core-spun yarn is a high-quality raw material for the production of health-care stretch fabrics, which consists of two parts: cotton and spandex. Spandex is the inner line (covered), spandex core-spun yarn can be used as a covering line from a variety of fibers, such as cotton T/C, CVC, T/R including wool, modal, according to the customer's needs for different fabrics for spinning. Spandex: Lycra, Iles State, Eastland, the current brand has a number of factories in the country. At present, the commonly used yarns have 16+70D, 10+40D, 12+70D, 12+40D, 16+40D, 16+70D, 21+40D, 21+70D, 32+20D, 40+40D, 40+20D, 50+20D, 60+20D. Spandex core spun yarns are widely used. The market is one of the main raw materials for stretch denim, corduroy, strong poplin, and women's fabrics. The fabrics made are also widely used for the production of commonly used items because of their unique characteristics. Second, the advantages of spandex yarn Spandex core-spun yarn has the advantages of elastic durability, air permeability, and hygroscopicity. Spandex core-spun yarn has its own unique advantages, high technological content, strict requirements for spinning technology, and excellent elastic durability, breathability, and strong moisture absorption. Therefore, it is widely used in the market, and the finished fabric made with it is deeply loved by a large number of manufacturers and consumers. Elastic yarn is divided into two categories: covered elastic yarn and elastic core-covered yarn. The covered elastic yarn is made of a polyester filament and an spandex. It is mechanically connected in spandex and polyester filaments to form a stretch yarn. . The main ones are: 100D+40D 200+70D 300+40D 300+70D. The covered yarns are divided into empty bags, machine bags and nylon bags. Spandex-cored elastic yarn is formed by covering the spandex filaments with outer fibers. Because of the difference between the two, the use will be different. Third, the spandex yarn in the weaving, printing and dyeing process prone to problems Different yarn draw ratios and uneven strips are the main causes of fabric problems. Spandex core-spun yarns generally have more wefts in the weaving process. There are several kinds of wefts in the finished products: the width of the fabric is narrow and irregular, the fabric surface is uneven, the elasticity is poor, the rebound is not in place, and the fabric is formed. Wide leak (white point). The reasons for the uneven width and unevenness of fabrics are: In the same batch number, the yarn drafting ratio is different and the yarns are uneven; there are also uneven widths and irregularities on the air-jet looms. The reason is uneven. When double jets are used, the double jets have different amounts of gas, which are faster and slower during the yarn feeding process. This results in differences in the rebound of the spandex core-spun yarns on the cloth; mixed batch is the most serious one. Ninety-nine percent of the width of the width of the door will be narrow; there is no spandex yarn in the spandex core yarn (we call it hollow yarn). The main reason is that during the spinning process, the wire on the godet is broken and the roller is always Rovings are formed in the yarn. On the fabric surface, the white spots that appear after dyeing are spandex core-spun yarns. During the production process, the flares and guidewires are not on the same line to form a spandex filament. This is called eccentric yarn; The web did not meet the requirements. The narrowing of the door width was mainly due to the elasticity of the spandex core-spun yarn and the too thin warp yarn density. Width widens and the principle is reversed. When the above situation occurs, it is necessary to communicate with the customer when receiving orders or sales of elastic yarns. It is considered to be good for the width of the machine and the width of the machine door to achieve a wide range of warp and weft density. During the production process, spandex yarn mill will adjust the drafting rate of spandex yarn on the surface of the fabric so that it will not affect the finished width in weaving.  Changxing Xinyang Textile Co., Ltd. , https://www.xinyangtextiles.com
A, spandex yarn profile
October 14, 2021