(1) Common process methods
The anti-ultraviolet finishing process of fiber or textile is related to the characteristics of the finishing agent and the final use of the product. Commonly used process methods are: high temperature and high pressure exhaustion method, atmospheric exhaustion method, padding method, coating method, printing method and so on.
(2) Microencapsulation technology
Microcapsule technology has been widely used in industrial fields. It is a special packaging form. The substance in the capsule can be solid particles, liquid or air bubbles. The ultraviolet absorber is injected into the capsule, and the capsule is adsorbed on the clothing. The outer layer of the capsule ruptures due to friction during the consumption process, achieving the effect of slow release of the anti-ultraviolet finishing agent, which can resist long-term ultraviolet radiation.
(3) Sol-gel technology
Sol-gel technology refers to the process in which metal alkoxides are used as precursors to hydrolyze and condense into sols under mild conditions, and the sols are converted into oxide gels with a network structure by solvent volatilization or heating treatment. Treating fabrics with silica or other metal oxide nano sols can form a porous oxide xerogel film on the surface of the fabric, and the original nano sol particles form a three-dimensional network structure. Nanosols are easy to be chemically or physically modified, which can greatly improve the wearability of fabrics, make them multifunctional, and have excellent UV resistance.
(4) Foam method
The foam finishing process can replace the conventional padding process for anti-ultraviolet finishing of the fabric. The process greatly reduces the liquid rate of the fabric, has a significant effect of energy saving and consumption reduction, and increases the production speed, saves dyeing materials and reduces waste water discharge, which is in line with the development direction of today's green dyeing and finishing.
(5) Supercritical carbon dioxide
Since the first patent invention of textile supercritical fluid dyeing in 1988, the application research of supercritical carbon dioxide fluid in the textile industry has mainly focused on dyeing, especially for dyeing polyester fibers with disperse dyes. The study found that when the dosage is 1.0% benzotriazole ultraviolet absorber UV-234, the pressure is 20 MPa, and the processing temperature is 120 ℃ (393 K), the degree of opening of the polyester fiber is greater, and more ultraviolet absorbers are adsorbed. , UPF value can reach 60 and fiber physical properties are good.
(6) Nano photocatalyst
According to the anti-ultraviolet mechanism of textiles, nano-photocatalyst is mainly used as an ultraviolet reflector (shielding agent) to achieve the purpose of anti-ultraviolet radiation by reflecting incident ultraviolet rays.
The anti-ultraviolet fabrics produced by Yulong Textile in Xinxiang City are commonly all-cotton anti-ultraviolet fabrics and polyester-cotton anti-ultraviolet fabrics. Other fabrics can also add anti-ultraviolet functions.
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