近几年来,世界各国都在积极采取措施来减少游离甲醛的含量,但因甲醛的价格低廉,估计在近期内“三醛胶”不会取消而仍然使用。目前各国也都在大力发展其他水基胶黏剂,木材工业胶黏剂中使用最多的是聚醋酸乙烯酯乳液、丙烯酸酯乳液、聚氨酯等;还有无污染、无毒的蛋白质胶。后者在上世纪50年代在木材工业中占相当大的比例,但因蛋白质胶耐水性差,逐步由合成树脂胶所代替。近年来,美国为了环保安全,努 In recent years, all countries in the world are actively taking measures to reduce the content of free formaldehyde, but because of the low price of formaldehyde, it is estimated that in the near future “” three aldehyde rubber "will not be canceled and still be used. At present, all countries are also vigorously develop other water-based adhesives, wood adhesives used in the industry is the largest polyvinyl acetate emulsion, acrylic emulsion, polyurethane, etc .; there is no pollution, non-toxic protein glue. The latter accounted for a considerable proportion of the wood industry in the 1950s but was gradually replaced by synthetic gums due to poor water resistance of the protein gums. In recent years, the United States has made efforts to protect the environment