UV method for producing textile fabrics

UV fabric , there are two methods, one fiber-forming polymer in the polymerization process or added to a molten state composition having an ultraviolet shielding performance . Choose a suitable UV absorbers with fiber-forming polymer with a monomer copolymer prepared by the UV copolymer , and then spun into UV fibers. Second, in the fiber manufacturing process or any stage UV shielding agent into the fibers. UV manufacturing fiber spinning can be obtained by blending the UV- screening agent or an ultraviolet absorber polymer powder added to the polymer blend or direct spinning , can be made ​​of anti-UV masterbatch then spun .
UV shielding agent through the coating or impregnation processing methods for finishing of textiles . Coating method is generally added in the amount of coating agents ultraviolet shielding agent , the surface of the fabric with the applicator for precision thin coating , and after drying , and the necessary heat treatment, a thin film formed on the surface of the fabric . Dipping the shielding agent is usually combined with the fiber , organic screening agent and fiber bonding is mainly masked by crosslinking agent molecules to macromolecules and fiber links , inorganic screening agent with the fibers primarily by adhesive binding shielding agent stuck in the textile fibers.
UV radiation UV shielding agent mainly rely on the reflection and absorption of the UV radiation on the fabric by triple shielding against UV , which is to go through the surface of the inorganic screening agent reflection , through sub-layer absorbs organic screening agent , and finally by the inner fiber its absorption , can achieve the purpose of shielding ultraviolet radiation . Cross-linking agent can be crosslinked organic UV screening agent on the fiber , the inorganic mask by an adhesive agent adhered to the fabric surface . If the fabric through double shielded , can achieve the desired results , usually only after a finishing can be.
According to the information abroad , the fabric UV shielding rate of about 90%, in order to achieve practical requirements. Therefore, the need through a certain process, improve the fabric UV absorption properties.
Textile fiber itself has a certain UV shielding effect absorption , UV textile raw materials should be preferred to absorb UV shielding itself has a certain function of the fiber. Differences in the structure of the fiber , various fibers to UV shielding effect are quite different . Polyester molecules containing benzene , wool, silk and other protein fibers molecules containing aromatic amino acids, strong UV absorption ; cotton , rayon and other fibers to UV absorption is weak. Bamboo fiber contained sodium copper chlorophyll is safe , good UV absorbers , UV its antibacterial deodorizing effect is cotton fabric 20 times .

In addition , bamboo fiber also has strong moisture absorption , antimicrobial resistance, good dyeing and breathable performance, delicate and smooth , cool feeling , light , wearable , beautiful color, good drape properties. So, choose anti-acid fabric has some excellent shielding ultraviolet absorbing bamboo fiber as raw material .
Inorganic zinc oxide UV shielding agent reflection wavelength 240-380nm, shielding effect, and inexpensive , non-toxic. With bamboo fiber contained sodium copper chlorophyll absorption wavelength of 180-290nm play a complementary effect.
The organic ultraviolet shielding agents are salicylic acid lipid compound, a metal ion compound , benzene, ketones , and benzotriazole . Salicylic acid lipids low melting point, easy sublimation and the absorption wavelength distribution in the short side of the compound of the metal ions , often used as a chelate , benzene, ketones high prices . Therefore, the choice benzotriazoles .
The impregnation method , a dipping process has little effect on the texture of the product . Summer apparel fabrics to light the main varieties , with the impregnation method of processing is more appropriate.
As a benzotriazole ultraviolet absorber is insoluble in water , such as the shield is dissolved in a nonaqueous solvent finishing , only the operation inconvenient , and pollution of the environment , the use of benzotriazole UV absorbers for emulsification , the shielding agent is uniformly dispersed in the aqueous phase , with a crosslinking agent treatment liquid epoxy dubbed . Then by dipping, drying and curing process .