室内甲醛的来源
Sources of indoor formaldehyde
用作室内装饰的胶合板、细木工板、中密度纤维板和刨花板等人造板材中含有甲醛。因为甲醛具有较强的粘合性，还具有加强板材的硬度及防虫、防腐的功能，所以用来合成多种粘合剂如：脲醛树脂，三聚氰甲醛，胺基甲醛树酯，酚醛树脂。含有甲醛成分并有可能向外界散发的其他各种装饰建筑材料，比如用脲醛泡沫树酯作为隔热材料的预制板、贴墙布、贴墙纸、化纤地毯、泡沫塑料、油漆和涂料等。目前生产人造板使用的胶粘剂以甲醛为主要成分的脲醛树脂，板材中残留的和未参与反应的甲醛会逐渐向周围环境释放，是形成室内空气中甲醛的主体。装修材料及新的组合家具是造成甲醛污染的主要来源。
Plywood, joinery board, MDF and particleboard used for interior decoration contain formaldehyde. Because formaldehyde has strong adhesiveness, it also has the function of strengthening the hardness of the board, preventing insects and corrosion, so it is used to synthesize various adhesives such as: urea formaldehyde resin, cyanuric formaldehyde, amino formaldehyde resin, phenolic resin. Other decorative building materials that contain formaldehyde and may be distributed to the outside world, such as precast boards made of urea formaldehyde foam resin, thermal insulation materials, wall covering, wallpaper, chemical fiber carpet, foam plastics, paint and coatings, etc. At present, urea formaldehyde resin with formaldehyde as the main component is used in the production of wood-based panel. The residual and non reactive formaldehyde in the panel will gradually release to the surrounding environment, which is the main body of forming formaldehyde in the indoor air. Decoration materials and new combined furniture are the main sources of formaldehyde pollution.