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脲(niào)醛(quán)树脂胶是木材加工行业用量最大的粘合剂。传统方法生产的胶、游离甲醛高出国外4-5倍。严重损害人体健康和污染环境,多年来国内诸多厂家和科研院所采用甲醛与脲素的克分子比时,加入及其过量的脲素后仍然难以达到降低游离甲醛气味效果。加之胶不溶解于水、涂刷性能、粘接力及耐水性差等弊端,国外已禁止使用。由于价格低廉,我国仍然大量的生
Urea resin is the largest amount of binder in the wood processing industry. Traditional methods of production of plastic, free formaldehyde 4-5 times higher than abroad. Serious damage to human health and environmental pollution, many domestic manufacturers and research institutes over the years by the molar ratio of formaldehyde and urea, adding urea and its excess is still difficult to achieve the effect of reducing free formaldehyde odor. In addition, the glue does not dissolve in water, brushing performance, adhesion and poor water resistance and other drawbacks, foreign countries have banned the use. Due to low prices, our country is still a large number of students