The principle of fluorescence in textile fluorescent fabrics
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Fluorescent fabric Fluorescent cloth Special work clothes Anti-static fabric Flame retardant fabric Anti-oil and water-repellent fabric
Fluorescence is the luminescence of light. When ultraviolet light, or some kind of light, shines on a fluorescent substance, the substance will absorb energy consistent with its characteristic frequency, and then transition from the ground state to an excited state with higher energy. Molecules in an unstable excited state will transfer to a lower vibrational energy level of the excited state in a short period of time, balance the excited state, and then fall back to a higher vibrational energy level of the ground state. In the process of falling back, the energy is attenuated in the form of fluorescence, and the fluorescence disappears immediately when the irradiation is stopped. It seems that the emission of fluorescence is the reverse process of light absorption. The fluorescence spectrum has a mirror-like relationship with the absorption spectrum, but the main reasons why the fluorescence spectrum is always red-shifted compared to the corresponding absorption spectrum are: 1. Excitation of the transition to a high vibrational energy level in the excited state The state molecules first undergo vibrational relaxation at a faster rate, dissipating part of the energy and reaching the zero vibrational energy level. 2. In order to achieve a stable state at a lower energy level, the configuration of the excited molecules can be adjusted quickly, thereby causing some energy loss. 3. The essence is that the energy of the fluorescence quantum is lower than the energy of the absorbed photon. The degree of this change is often characterized by fluorescence efficiency and fluorescence quantum yield. This can be defined as the ratio of fluorescence emission intensity to absorbed light intensity. The visual effects of fluorescent dyes include both the color produced by selective absorption of visible light and the fluorescence they emit. In terms of spectrum, it absorbs visible light and emits visible light in a larger wavelength range. And there is a certain interface area between absorption and emission! The spectrum can be divided into 4 parts. The absorption zone reabsorbs and re-emits light (junction zone), and the emission zone (emission) has no influence.
100% cotton fluorescent fabric produced by textiles, fluorescent cloth: This fluorescent fabric is a 100% cotton woven fabric with a soft hand feel, making the wearer feel comfortable and comfortable, and at the same time, it also adds a fluorescent function. , improving the wearer’s safety working factor. It can also meet the international test report of European standard EN471. This fabric is processed and dyed using imported dyes and auxiliaries, which is environmentally friendly and has bright colors. It can be used to make various work clothes, with bright colors and comfortable wear. On this basis, anti-static, flame retardant, oil and water repellent functions can also be added.
：Textile
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