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China Wood plastic wall panels wpc wall panel cheapest Factory，China Wood plastic wall panels wpc wall panel cheapest Factory，China Wood plastic wall panels wpc wall panel cheapest Factory
The pollution period of different decorative materials is not the same. Three kinds of commonly used decorative materials, floor, paint and wallpaper, have been tracked and measured in China. It is found that the pollution period of these three materials is 1 month, 2 months and 3 months respectively. 2, radionuclides, radionuclides in building materials are mainly radium, thorium, uranium. Domestic scholars reported that granite and cinder block had the highest internal and external exposure index of wall building materials, while limestone and concrete had the lowest.
Marble brick, tile and other decoration building materials radioactivity level is also higher, tile radioactive glaze is higher than the back. 3. Radon, indoor radon mainly comes from the building foundation, indoor ground and its surrounding soil,
rocks, building materials, water supply and outdoor air. Indoor radon pollution has been reported in the United States, Japan, France, Germany, Denmark, Switzerland and other countries. Radon is the main source of radiation that people are exposed to in their lifetime. 40% of the annual effective dose of natural radiation that people receive comes from radon and its daughters.