What calls ultrafine fiber: the definition of ultrafine fiber is different, the fiber with fineness of 0.3 denier (diameter of 5 microns) or less is called ultrafine fiber. The 0.00009 denier superfilament has been produced abroad, and if such a filament were pulled from the earth to the moon, its weight would not exceed 5 grams. China has been able to produce 0.13-0.3 denier microfiber.Because of the extremely fine fiber size, greatly reduce the stiffness of the silk, into the fabric feel is very soft, the fiber can also increase the layered structure of the silk, increase the specific surface area and capillary effect, so that the internal reflection of the fiber on the surface distribution more delicate, so that it has a silk elegant luster, and good moisture absorption and dispersion. With the superfine fiber clothing, comfortable, beautiful, warm, breathable, good drapability and fullness, the hydrophobic and antifouling sex has obviously improved, using the large specific surface area and loose, can design different organizational structure, make it more to absorb sunlight, heat, or faster lost temperature is warm in winter and cool in summer.Ultrafine fiber has a wide range of USES: the fabric made with it, after sand-washing, fleece grinding and other advanced finishing, forms a layer of surface similar to the appearance of peach skin fuzz, and is very loose, soft, smooth, made of this fabric high-end fashion, jacket, T-shirt, underwear, skirt, such as cool and comfortable, sweat absorption is not close-fitting, rich youth beauty; Foreign use microfiber to make the advanced artificial suede, both the appearance that resembles genuine leather, feel, style, have low price again; Because the microfiber is thin and soft, it can be used to make clean cloth decontamination effect is very good, can wipe all kinds of glasses, film and television equipment, precision instruments on the mirror without damage; The ultra-fine fiber can also be made into ultra-high density fabric with extremely smooth surface, which can be used to make sports clothes such as skiing, skating and swimming, which can reduce resistance and help athletes to create good results. In addition, microfiber can also be used in filtration, health care, labor protection and other fields.