甲醛来源
Source of formaldehyde
室内空气中的甲醛主要来源于装修材料及新的组合家具使用的人造木板，如胶合板、大心板、中纤板、创花板(碎料板)中的粘合剂。遇热、潮解时，粘合剂中甲醛就释放出来。用做房屋防热、御寒的绝缘材料—池沫，在光和热的作用下，老化后也可释放出甲醛。用甲醛做防腐剂的涂料、化纤地毯、化妆品、地板胶等产品，也可缓慢释放甲醛。每支香烟的烟雾中也含甲醛20-88微克。此外，还有少量甲醛来自室外的工业废气、汽车尾气及光化学烟等。
Formaldehyde in indoor air mainly comes from decoration materials and wood-based panels used in new combination furniture, such as plywood, coreplate, medium fiberboard, and adhesive in scrap board. Formaldehyde in the adhesive is released when it is heated and deliquescent. Pool foam, used as insulation material for heat and cold protection of houses, can also release formaldehyde after aging under the action of light and heat. Formaldehyde can also be slowly released from coatings, chemical fibre carpets, cosmetics, floor glue and other products using formaldehyde as preservative. The smoke of each cigarette also contains 20-88 micrograms of formaldehyde. In addition, a small amount of formaldehyde comes from outdoor industrial exhaust, automobile exhaust and photochemical smoke.