The Development Of UV-Protective, Heat Insulated And Cooling Umbrella Fabric Finished By Nano-Materials

With the improvement of people's living standard, the properties of textiles are highly demanded more and more. And for sunshade, people hope that it can not only keep out the light from the sun, but also can stop the ultraviolet even has the effect of heat insulation and cooling. Appropriate nano materials were used to be mixed with the coatings to shield the ultraviolet and infrared. They can not only prevent ultraviolet radiation from damaging to human body, but also reduce the temperature under an umbrella, and give a person comfortable feeling in sorching summer. This paper will mix the ultrafine TiO2 and nano ATO with the aqueous polyurethane coatings, and then coat on the polyester and nylon fabrics. The results show that the composite powder of ultrafine TiO2 and nano ATO can effectively screen ultraviolet radiation and reduce the temperature under cloth.In this paper, the ultrafine TiO2 and nano ATO were used as the ultraviolet protective and heat insulated powders, and were dispersed in the water through the ball mill and ultrasonic wave.The zeta potential, average particle size, and depositional height were analyzed. The results show that ultrafine TiO2 and nano ATO can be stably dispersed in the water by the action of carboxylic acid sodium.In this paper, the ultrafine TiO2 and nano ATO were blended into aqueous polyurethane coatings and coated on the polyester and nylon fabircs finished by waterproof agent.The SEM, ultraviolet protection, heat insulation, and water presure resistance were tested. The results show that nanoparticles can evenly dispersed in coating. The effect of ultraviolet prevention can get to UPF> 50, UVA< 5% which meet up with the GB/T 18830-2009; It can lower the temperature by 8-9℃through the homemade airtight chamber test system, and by 3℃through the open test system.This subject adopts aqueous polyurethane coatings, and add the properties of the ultraviolet protection and heat insulation to the sunshade cloth, It can not only screen ultraviolet radiation but also reduce the temperature under an umbrella and give it a variety of functions. The aqueous polyurethane coatings were used instead of solvent coatings, It can prevent the organic solvent from polluting the environment, and may have a good development prospect in the industrial production.