Processing methods and finishing of UV-resistant textiles
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UV resistant textiles UV resistant fabrics textiles
(1) Commonly used process methods
Fiber or< TheUV-resistant finishing process of strong>textilesis related to the characteristics of the finishing agent and the final use of the product. Commonly used process methods include: high temperature and high pressure exhaust method, normal pressure exhaust method, padding method, coating method, printing method, etc.
(2) Microcapsule technology
Microcapsule technology has been widely used in industry Field, it is a special form of packaging, and the material inside the capsule can be solid particles, liquid or bubbles. The ultraviolet absorber is injected into the capsule, and the capsule is adsorbed on the clothing. Due to friction during the taking process, the outer layer of the capsule ruptures, achieving the effect of slow-release anti-UV finishing agent and resisting long-term ultraviolet radiation.
(3) Sol-gel technology
Sol-gel technology refers to metal Alkoxy compounds as precursors are hydrolyzed and condensed into sol under mild conditions, and the sol is transformed into an oxide gel with a network structure through solvent evaporation or heating treatment. Treating fabrics with silica or other metal oxide nanosols can form a porous oxide xerogel film on the surface of the fabric, and the original nanosol particles form a three-dimensional network structure. Nanosol is easy to carry out chemical or physical modification, which can greatly improve the wearing properties of fabrics, make them multi-functional, and have excellent UV resistance.
(4) Foam method
The foam finishing process can replace the conventional padding process UV-resistant finishing of fabrics. This process greatly reduces the liquid-carrying rate of fabrics, has significant energy-saving and consumption-reducing effects, increases production speed, saves dyeing materials and reduces wastewater emissions, which is in line with the current development direction of green dyeing and finishing.
(5)Supercritical carbon dioxide
Supercritical fluid dyeing of textiles since 1988 Since the invention of the first patent, research on the application of supercritical carbon dioxide fluid in the textile industry has mainly focused on dyeing, especially for polyester fiber dyeing with disperse dyes. The study found that when the dosage of benzotriazole ultraviolet absorber UV-234 is 1.0%, the pressure is 20 MPa, and the processing temperature is 120°C (393 K), the polyester fiber is more open and absorbs more ultraviolet absorber. , the UPF value can reach 60 and the fiber physical properties are good.
(6) Nanophotocatalyst
According to the anti-UV mechanism of textiles, nanophotocatalysts mainly As a UV reflector (shielding agent), it achieves the purpose of resisting UV radiation by reflecting incident UV rays.
Ultraviolet-resistant fabrics produced by City Textile are commonly made of cotton anti-UV fabrics and polyester-cotton anti-UV fabrics, and other fabrics are also UV protection function can be added.
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