Tungsten trioxide has promising applications in the fields of balcony thermal insulating film. And such a heat insulation film can be a functional transparent PVB film material, which is obtained by blending nano tungsten oxide material with PVB. This is a new type of heat insulation film, which solves the difficulty of large haze of functionalized PVB transparent film material, with the characteristics of environmental protection.

Tungsten trioxide is a functional material that can absorb light of a specific wavelength - mainly near-infrared light (heat radiation in the sunlight), so it can be used to produce living room thermal insulating film. With its popularization and application in the field of heat insulation, the preparation of tungsten trioxide powder has attracted much attention from the scholars. And the following is a method for preparing ultrafine tungsten trioxide.

Tungsten trioxide for preparing bedroom thermal insulating film is not pure tungsten trioxide powder, but doped tungsten trioxide nano powder. And the prepared heat insulation film is a new type of energy-saving material, which is environmentally friendly with long service life.

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%.