sweat-absorbent, breathable, strong warmth retention, easy to dye and print. Participate in chemical fiber in cotton, suitable for adjustable underwear, not only breathable, but also supporting effect. But cotton is easy to fade and is susceptible to damage from mildew and silverfish. When exposed to water, the size of the cotton shrinks or becomes larger, the stretch elasticity is poor and it is easy to wrinkle. Sweat acid also reduces the strength of cotton and causes yellowing. Cotton is simply tired and deformed, and it is not easy to evaporate after absorbing sweat. Because of these objective disadvantages, cotton cannot be used in the ultrasonic process of underwear, as long as nylon and spandex can.
Lycra is a kind of excellent spandex, its stretch can reach 4-7 times, and it can be completely restored to its original shape, and it has very little binding force on people. Lycra can use any fabric together, but it cannot be woven into fabric alone. Because Lycra is inherently flexible, comfortable and bearing capacity, it gives the fabric a special resilience. When used on underwear, it not only makes the underwear more elastic, but also fits the body. The upper body effect is more comfortable and beautiful, not easy to lose shape, and difficult to show. Wrinkles, etc., also have a fine and smooth texture.
Modal is a fiber made by spinning natural wood or other materials. Because the fiber itself and the materials used in the production process can be recycled and reused, it is an environmentally friendly product in the new era and is also called regenerated cellulose fiber. It is breathable and hygroscopic. Its soft, ventilating, and delicate characteristics make the fabric smooth as silk and extremely comfortable to wear. It is not easy to fade after repeated washing. But it is easy to pilling, poor in shape retention and wear resistance, and has strong flammability.
The scientific name of nylon is polyamide, which is the nylon fiber that is often said in daily life. Nylon is made by drawing nylon materials into very fine fibers and then weaving them. According to different nylon materials, nylon 6 and nylon 66 are common. Nylon fabric has good elasticity and elastic recovery. Its wear resistance ranks first among all kinds of fabrics, many times higher than other fiber fabrics of similar products, so it has good durability. Moreover, the moisture absorption of nylon fabric is a better type among synthetic fiber fabrics, so clothes made of nylon are comfortable to wear.