In recent years, the application of luminescent materials in clothing has attracted attention, and clothing containing luminescent materials has begun to play an important role in the fields of transportation, fire protection, UV protection, clothing design, and stage performances.
Luminescent fiber is a special fiber that absorbs energy through light or ultraviolet radiation, and then converts it into light radiation. Generally, polyester, nylon or polypropylene is used as the base material, and rare earth long-lasting luminescent materials and nano-level functional additives are added. Light conversion functional fiber made by spinning process. The fiber has various colors when there is visible light, and when there is no visible light, it can emit light of various colors. According to the different luminescent materials added, luminescent fibers are mainly divided into luminous fibers and fluorescent fibers.
Luminous fiber is a non-toxic, harmless, non-radioactive, and recyclable functional fiber. Its biggest feature is its excellent afterglow performance. The afterglow performance of the currently developed luminous fiber still does not reach the brightness of night lighting, and its brightness decays rapidly after leaving the excitation light source. The color of the long afterglow material is rich and colorful, but the material used in the fiber is very few. The luminous fiber produced is yellow-green at night, which is relatively simple.
Fluorescent fibers can be divided into infrared fluorescent fibers and ultraviolet fluorescent fibers according to different excitation light sources. Infrared fluorescent fiber means that it can emit light of different colors under the excitation of infrared light (the wavelength is usually between 0.7 and 1.6μm). It uses up-conversion phosphors, which are accumulated and converted into high-level light with low-level light sources. Because the wavelength of the excitation light source is invisible light, infrared fluorescent fibers are often used in the field of anti-counterfeiting technology. Ultraviolet fluorescent fiber refers to a fiber that can emit a variety of different colors under the excitation of ultraviolet light and can return to its original color when the ultraviolet light disappears.
The coating method uses cotton, polyester/cotton or polyester fabric as the base fabric to mix the luminescent material with the binder to form a coating, and a new functional fabric is obtained after the coating treatment. The commonly used ultra-long afterglow phosphor SrO2Al2O3 (MSiO2): Eu2+ excitation wavelength and emission wavelength are around 510nm, daily light sources have an excitation effect on it, and its emission wavelength is in the visible light range. Such phosphors are chemically stable, non-toxic, non-radioactive, and safe to humans. Rare earth luminescent materials are specially treated and added to the dyeing bath and printing paste in the form of additives, which can significantly improve the color depth and color vividness of dyed and printed fabrics.
In the production of luminescent material dyes, fluorescent dyes are mainly added to the dye solution for dyeing. This method can make printed and dyed fabrics brighten and brighten, and emit fluorescence under ultraviolet light. Due to the different dyeing mechanisms of different fiber fabrics, fluorescent dyes are also diverse. For example, nylon is mainly dyed with disperse or acid fluorescent dyes, and cotton and polyester/cotton blended fabrics are dyed with reactive fluorescent dyes.
The fiber optic fabric is woven into a fabric using textile technology combined with plastic optical fibers. Through the high permeability of the fiber, light-emitting diodes are added at the end to become a self-luminous fiber optic fabric after power on. Because the fiber optic fabric is blended with fiber and textile fiber, the fabric presents the same effect as ordinary fabric during the day, but it emits dazzling light at night when it is energized. This kind of fabric is light and thin, soft and comfortable, and has a variety of colors.