Cesium doped tungsten oxide powder may be applied to produce thermal insulation paper, which is a kind of environmentally friendly transparent heat insulation film. The obtained heat insulating thin paper can be used as a building heat insulation film to shield ultraviolet rays and near infrared rays. And it also has a high visible light transmittance.
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It is well known that long-term exposure can also cause fading of articles and aging of plastic rubber parts although ultraviolet rays account for only 3% of sunlight. And excessive UV exposure can also cause cancer in human skin. According to experts, the thermal insulating film can block more than 99% of ultraviolet rays. In other words, it not only can effectively prevent people in the car from being burned by excessive ultraviolet rays, but also protect the car's audio and other interiors from being sunburned. For visible light, the visible light transmittance of the cesium doped tungsten oxide heat insulation paper can reach more than 70%, which does not affect indoor lighting.
