Tungsten trioxide can be made into tungsten trioxide nano slurry first, and then used together with other components to produce bathroom thermal insulating film. Some experts have prepared a high-performance PVB thermal insulation film, whose composition and mass percentage are: tungsten trioxide nano slurry of 0.1?0.5%, wherein tungsten trioxide particle diameter in the slurry is less than 20nm; PVB resin powder of 50?50.80%; plasticizer of 18?45%; antioxidant of 0.1?1%; UV absorber of 0.05?1%.
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It is reported that the high-performance PVB bathroom thermal insulating film prepared using nano particle size tungsten trioxide as dingal particles has high visible light transmittance and infrared shielding coefficient, especially the ability to shield infrared rays in the near-infrared region with a wavelength below 1000 nm is far greater than the PVB heat insulation film prepared using nano ATO or ITO slurry as dingal material.
