Spandex yarn characteristics and uses

Spandex yarn, elastic fiber is also a synthetic fiber, medium polyurethane fiber, and mid-section polyurethane fiber. It is versatile and can be used as a swimsuit due to its strong stretchability. Diapers; strong recovery power, can be used as underwear. Outerwear; strong retention, can be used as tights. Hosiery; highly moldable and can be used as outerwear, etc.

Elastic fiber is also a synthetic fiber , polyurethane fiber (POLYURETHANE), segmented polyurethane fiber (Segmented polyurethane FIber). Among them, for example: LYCRA Spanzelle Vyrene elastic fiber is collectively known as: SPANDEX , which is produced in various countries, among which ‘Du PONT’ DuPont Company is the leader, and its product is called LYCRA , generally called LYCRA. It must be a DuPont product, otherwise it will be classified as ‘SPANDEX’ (ten feet long). The cross section of the DuPont tension frame is round, and the number of strips is 10-15d/piece; The cross-section of Korean root is round, and the number of strips is 10-15d/root; it can be inspected with a 100x magnifying glass. Distinguishing;

Characteristics

The drawstring is used to combine with other fibers to form other yarns Or cloth, its characteristics are high stretchability, recovery force, and retention force, making the fabric straight. Stretchable and quick to restore shape; use

It has a wide range of uses and can be used as a swimsuit due to its strong stretchability. Diapers; strong recovery power, can be used as underwear. Outerwear; strong retention, can be used as tights. Stockings; strong formability, can be used as outerwear, etc.; general pull frame (collectively referred to as light root) must use a special device (draw frame reel) when weaving to make the traction and drawing tension even. The cylinder machine uses a positive yarn feeding device, and the The knitting machine is equipped with a finishing machine; the stretch frame can be mixed with other yarns and spun into other products, such as being covered with other fibers; the expansion rate is suppressed to 2-3 times, collectively referred to as root wrapping. When weaving this kind of root wrap, no special device is required, just the original braiding method can be followed; “Bale wrap” means that the outer layer is covered with other yarns Wrapping. If it is wrapped with only one layer, it is called single-pass wrapping. If it is wrapped with two layers, it is called double-pass wrapping. If cotton or wool is used in the weaving process, the stretch frame is wrapped in the center to form a core spun yarn (CORE SPUN YARN). Characteristics of the stretch frame:

Model brightness and fiber D) Cutting elongation (%) Cutting strength (8/d) 100% force (g) Elongation unloading force (g) Low characteristics and uses (T-127 matte40420 530530 0.840.77 2.51.3 0.55.9 High whiteness retention, high elasticity stockings, diapers in contact with skin, etc. High resistance T-127C Transparent 40420 580560 0.750.88 2.521.1 0.6.5.3 Transparency and T-127 Same tights. Stockings. Work pants. jeans. Underwear Thermal T-153C Transparent 40 540 0.72 2.4 0.6 Transparent. High whiteness retention. Optical resistance. Highly elastic outerwear and underwear) T-902C Transparent 180 670 0.61 9.8 3.1 Transparency. High stretch and softness. Recovery tights in fine woven fabric (high T-152C Transparent 40420 580550 0.750.89 3.422.4 0.65.7 Transparency. Moderate heat setting Moderate elastic stockings. Socks. Bodysuits. Hosiery heat resistance) T-152B Bright 40 530 0.91 3.4 0.6 Resistance to knocking. Same as T-152C. High swimsuit outerwear (high heat resistance) T-178C Transparent 18 410 1.34 1.4 0.2 Transparency. Heat setability. Softness Stockings. coat. High heat resistance of underwear: high temperature will weaken the elasticity of the stretch frame, so the stretch frame is usually divided into: high heat resistance. Medium heat resistant. There are three types of low heat resistance, and their heat resistance degrees are as follows

Respective varieties Dry heat treatment Dyeing temperature Warm heat treatment

High T -127 T-127C.T-902C.T-153C 180-190OC 125 220-120 Medium T-152C.T-152B 175-185OC 120 105-225 low T-178C 140-160OC 95 100-220

Whiteness maintenance: The rack will turn yellow when exposed to pollutant gases in the atmosphere, NOx and sunlight, so it is necessary to choose a rack with strong light resistance;

Durability

　: The tensile frame will suffer from elongation, wear and embrittlement due to sunlight and time, or the friction in the swimming pool will also cause damage to the tensile frame, so it is necessary to choose a durable tensile frame;

Dyeing processing: 1. Dyes can be acidic dyes or disperse dyes. When dark colors are limited to dyes with high fastness, please choose transparent stretchers;

　2. The pH value of dyeing processing should be 3-22. It is difficult for dyeing additives to have high resistance, but bleaching agents cannot be used;

Washing: 1. The stretch fabric can be washed with soap or neutral detergent; 2. The bleaching power of alkaline bleach is very strong and will make the stretch fabric brittle, so it is best not to use it; 3. It is not suitable for washing. The acidic whitening agent used together with the agent has no effect on the stretch fabric and can be used; 4. When dry cleaning after washing, avoid direct sunlight;