Application of UVLED light curing technology in textile printing and dyeing

Uvled的高速发展时期是在7，80年代的时候，在那个时候，基本所有涉及到固化的生产行业在在寻求着用uvled来进行固化的可能性。也涌现出很多行业因为uvled的使用得到了高速发展，甚至发展成了行业巨头。

Uvled high speed development period is in 80, 7 time, at that time, basically all related to the solidification of the production industry in the search for the possibility of curing with uvled. Also emerged in many industries because of the use of UVLED has been high-speed development, and even developed into a giant industry.

紫外线照射技术在纺织印染行业中的应用开始于20世纪90年代后期。主要应用在胶辊的表面处理、纤维种类的鉴别、纤维的表面改性和固化油墨领域。

The application of ultraviolet irradiation technology in textile printing and dyeing industry began in the late 1990s. Mainly used in roller surface treatment, surface identification, fiber type modification and curing inks.

胶辊是纺纱工艺过程中的主要牵伸部件，其性能直接影响成纱质量。国内外丁腈胶辊表面处理一般都是二次酸处理。但酸处理的丁腈胶辊使用寿命不长，且随着使用时间的延长会使成纱条干逐渐恶化。早在20世纪70年代，国外就开发了用紫外线照射胶辊表面处理技术，国内许多单位也先后进行了实验，结果显示经紫外线照射后胶辊的弹性增加，表面更加光滑，同时抗绕花性得到改善。紫外线照射可以改变橡胶分子的空间网状结构和分子的排列顺序，增加大分子链的内能，从而胶辊弹性增加;另外橡胶大分子吸收光量子能量后运动加剧，分子间距离缩短，分子颗粒度变小，表现为胶辊表面手感光滑;同时胶辊中的极性基团和电解质配合剂分子更为靠近，增强了消除外来静电的能力，使胶辊在纺纱时的抗绕花性能得到显著改善，从而提高纺纱质量。

Rubber roller is the main drafting components in the spinning process, its performance directly affects the quality of yarn. The outer surface processing generally domestic nitrile rollers two acid treatment. But the cots acid treatment service life is not long, and with the extension of time will make use of the yarn evenness deterioration. Back in the 70s of the 20th century, foreign developed by ultraviolet radiation rubber roller surface treatment technology, many domestic units has also conducted experiments. The results showed that the rollers elasticity increased after UV irradiation, the surface is more smooth, and anti wind flower is improved. Ultraviolet radiation can change the order of the rubber molecules of spatial reticulated structure and molecular, and increase the energy of the molecular chain, thereby increasing the elastic rubber roller; increases photon energy after exercise absorption also rubber molecules, intermolecular distance relationship, molecular particles of small form roller surface smooth to the touch; and rollers in the polar group and electrolyte complexing agent molecules closer, enhance the ability to eliminate foreign electrostatic to cots in spinning anti entangling performance are significantly improved, so as to improve the quality of spinning.

紫外线光量子具有较大的能量，当紫外线照射到很多物质上时使分子受激发而发射荧光，这种现象称为紫外线的荧光效应。当紫外线照射某些物质时，这些物质有选择地吸收后，发射出不同波长和不同强度的可见光。物质表面所发射的荧光能反映该物质的特性，凭此可对该物质进行定性和定量分析。当紫外线照射到纤维上时，由于各种纤维光致发光的性质不同，发射不同色泽的荧光，从而可以鉴别纤维种类。

Ultraviolet photons with great energy, when ultraviolet radiation to a lot of material on the molecular excited and emit fluorescence. This phenomenon called for UV fluorescence effect. When the ultraviolet light is irradiated with certain substances, these substances are selectively absorbed and emit different wavelengths and different intensity of visible light. The fluorescence emitted by the material surface can reflect the characteristics of the material, which can be used for the qualitative and quantitative analysis of the substance. When the ultraviolet radiation to the fiber, due to the nature of a variety of fiber photoluminescence is different, the emission of different color fluorescence, so as to identify the type of fiber.

紫外线的能量根据其波长的长短而有所差异，其能量大小与大多数有机物的化学结合能基本上属同一个范畴，当能量超过高分子化学结合能时，紫外线照射高分子纤维材料的分子链产生裂解，在有氧的大气条件下，大气中的氧分子变成臭氧、活性氧，高分子纤维材料被氧化，其表面生成羧基、醛基、羟基和羰基等。经紫外线处理后的高分子纤维材料可引入丰富的极性基团，如—OH、—NH2 等，从而提高高分子纤维材料的亲水性、吸湿性、抗静电性;引入消臭、抗菌物质，则可使高分子纤维材料具有消臭、抗菌性。紫外线对纤维的作用只发生在其表面几十至数千埃深度范围内，因此不影响纤维的基本物理性能及力学特性。

Ultraviolet energy according to the length of the wavelength difference, the size of its energy and most of the organic matter of chemical binding basically belong to the same category, when more energy than the polymer chemical binding energy, molecular chain of ultraviolet irradiation of polymer fiber material produce cracking, under atmospheric conditions in the aerobic and oxygen molecules in the atmosphere become ozone, reactive oxygen species, polymer fiber material is oxidized, the surface generated carboxyl and aldehyde, hydroxyl and carbonyl. After UV treatment after polymer fibers can introduce rich polar groups, such as - Oh, - NH2, etc., so as to improve the hydrophilicity, hygroscopicity and antistatic polymer fiber material; cancellation is employed odor, antibacterial substances, can make polymer fibers with eliminating odor, anti bacteria. The effect of ultraviolet radiation on the fibers only occurs in the range of tens to thousands of depth, so it does not affect the basic physical properties and mechanical properties of the fibers.

目前喷墨印花技术所使用的油墨主要有水性油墨和溶剂型油墨。水性和溶剂型油墨的应用和发展已经基本成熟。水性油墨的缺点在于干燥时间长，对底材的适应性小;溶剂型油墨虽不存在干燥问题，但由于含有挥发性的有机溶剂，易造成环境污染，因此其使用均受到限制。为了避免上述油墨的缺陷，紫外线固化技术被引入喷墨印花油墨中。紫外光固化油墨使用光活性预聚物作为油墨的基料，在波长200～450 nm的紫外光照射下，由光引发剂产生自由基，引起基料聚合和交联反应，使油墨从液态转成固态，得以固化。同样的机理还可以应用于紫外光固化胶黏剂、紫外光固化涂料羊、毛织物的固化防缩处理等技术中。

At present, the ink used in the ink jet printing technology mainly has the water ink and the solvent type ink. The application and development of water-based and solvent based inks have been basically mature. The shortcomings of the water-based ink is drying time is long, the adaptability to the substrate is small; the solvent based inks, though not a dry, but due to containing volatile organic solvents, easy cause environmental pollution, so its use were restricted. In order to avoid the defects of the ink, UV curing technology is introduced into the ink of the ink jet printing ink. UV curing inks using optically active pre polymers as the base material of ink, under the irradiation of UV light of wavelength of 200 to 450 nm, by light initiator to produce free radicals, binders polymerization and cross-linking reaction caused by, so that the ink from liquid to turn into solid can be cured. The same mechanism can also be used in UV curing adhesives, UV curing coating sheep, wool fabric cured shrinkproof processing technology.

虽然对于油墨的固化是一项传统的固化技术，但是除了在纸张上进行固化之外，人们还希望能够在更多的材质上将油墨的固化效果做得更好。现在已经出现了人们在石头，木头，布料上的固化应用。Uvled光固化的应用越来越广泛。

Although the ink curing is a traditional curing technology, but in addition to curing on the paper, people also want to be able to more material in the ink curing effect is better. Now there have been people in stone, wood, cloth on the solidification of the application. The application of Uvled light curing is more and more extensive.