人造板用脲醛树脂甲醛污染及低醛化途径

Pollution and Control of Formaldehyde from Urea-formaldehyde Resin Used in Making Artificial Wood Board

该文分析了国内人造板生产和使用状况,介绍了人造板用脲醛树脂在应用过程中甲醛释放的主要原因并概述了甲醛对人体健康的危害。讨论了通过降低甲醛与尿素的摩尔比,采用二次或多次缩聚工艺,开发各种各样的甲醛捕捉剂和树脂改性剂,真空脱水抽提游离甲醛等途径来降低脲醛树脂中游离甲醛的含量,生产符合环保要求的脲醛树脂胶粘剂,使用该胶粘剂的人造板可以减轻室内空气中的甲醛污染。

The present state of industrial production and usage of the artificial wood board, the main cause of formaldehyde release in its applications, the adverse effects of formaldehyde on human health and the method of lowering formaldehyde emission were discussed in the present paper. Through decreasing the mole ratio of F/U, using two or many times condensation technology, adding formaldehyde scavenger and modifier to the urea-formaldehyde adhesive resin, eliciting free formaldehyde by vacuum dehydration, the urea-formaldehyde (UF) resin adhesive that reaches the environmental standard will be developed.