Since May, the temperature has gradually increased and sales of anti-UV products such as sun protection clothing and parasols have risen. However, the reporter found that consumers’ enthusiasm for importing UV protection products is much higher than that of domestic products. Is the quality of domestically produced products really inferior to imported products, or is there any blindness in the tendency of consumers to buy? This has become the most perplexing issue for domestic manufacturers of UV protection products.
Domestic product quality comparable to shoulder international
It is undeniable that Japan has always been an international leader in the development of UV-resistant fabrics. At present, UV-resistant sportswear, shirts, hats, umbrellas, and other protective equipment that have a high reputation in the international market and a stable customer base are all from Japan.
Although the depth of research on anti-ultraviolet fabrics in Japan is not as deep as in Japan, the achievements of domestic research workers can not be underestimated: Shandong Julong Chemical Co., Ltd. combines UV absorbers and shielding agents, and successfully develops anti-ultraviolet rays for cotton fabrics. Finishing agent; Nano-class ceramic cotton textile developed by Xiamen Huapu High-tech Industry Co., Ltd., which also has anti-ultraviolet, antibacterial and far-infrared heat preservation function; clothes made of functional hybrid materials developed by Donghua University can block 99.7% of the Ultraviolet and ultraviolet protection coefficient is more than 50; the cotton fiber with permanent anti-ultraviolet function developed by the laboratory of spinning material of Wuhan Textile University has applied for national technical patent and will be used for fabric production, and it is expected to achieve real permanent protection of clothing. UV function.
Professor Wang Ran from Nanjing University of Technology pointed out that from the point of view of the finishing process, the quality of domestic UV protection products is not worse than that of international products, and the cost is relatively low. The main problem of poor sales is that the promotion of the market is not enough, and the awareness of consumers is insufficient. Product sales are not ideal.
Five types of new processing technology become popular
Xu Jie, general manager of Shandong Hongxin New Material Co., Ltd., who has nearly 10 years of experience in anti-ultraviolet textiles, stated that at present, there are roughly four ways to improve the UV protection performance of textiles in China. One is to directly select textiles with good UV resistance as raw materials for the production of textiles, such as linen, polyester fibers, etc.; second is to change the structure of the fabric, such as increasing the thickness, density, etc. of the fabric; thirdly, when the textile fiber is spinning Adding ceramic particles to reflect ultraviolet rays to achieve the effect of UV protection; Fourth, the fabric after finishing UV protection, such as the fabric padding UV absorber or blocking agent, or on the surface of the fabric UV protection coating finishing. However, these four processes have different degrees of defects in terms of environmental protection, cost, and product performance durability. If they are not improved, they will become a burden on enterprises in the near future.
According to Xu Jie, magnetron sputtering technology, electrospinning technology, plasma nanotechnology, microcapsule technology, and sol-gel technology are the latest popular technologies for UV protection fabric processing. Fortunately, these five kinds of technology, domestic manufacturers also have the ability to produce.
After comprehensively comparing the production processes and industrial development costs of each process, Xu Jie believes that electrospinning technology is the best way to improve the UV resistance of textiles. Xu Jie said that the UV-resistant fabrics produced by electrospinning technology will have a shielding rate of more than 95%, which can effectively prevent ultraviolet rays from invading and damaging the human body and have the properties of being non-toxic, non-irritating and wash-resistant. At the same time, these products have no irritation to the skin, no allergic reaction, and have good moisture permeability.
Electrospinning processes that can be used to increase the UV protection of textiles can be divided into jet coating processes and direct spinning processes. Spray coating method is to add ultraviolet shielding agent in the electrospinning solution and spray it onto the fabric through electrospinning to form a layer of nano-level anti-ultraviolet film on the surface of the fabric to achieve anti-ultraviolet effect. In the direct spinning method, an anti-ultraviolet finishing agent is added to the electrospinning solution to directly fabricate a fabric with an anti-ultraviolet effect. Xu Jie said that in addition to the excellent performance of the manufactured products, the cost of this process is not the highest, within the scope of the enterprise can bear.
Wang Ran very much agrees with Xu Jie. He said that although the industrialization of electrospinning process has yet to be improved, its market value is immeasurable, and researchers at Nanjing University of Technology and Tianjin Polytechnic University have made certain breakthroughs in the key technology of electrospinning. Wang Ran also stated that in the preparation of UV-resistant textiles by electrospinning, special attention should be paid to selecting suitable UV-resistant additives. The selected additive needs to have the ability to selectively and strongly absorb ultraviolet rays having a wavelength of 290 nm to 400 nm in order to effectively prevent and inhibit UV penetration. In addition, such additives should also have properties such as low volatility, good thermal stability, resistance to hydrolysis, and resistance to water extraction.
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