根据我省许多专县地方木材部门大量生产胶合犁辕,胶合犁脖胶合木制品的情况,在我们探索以树皮粉作尿醛胶活动性增量剂用于胶合板生产,初获成功的基础上,作了一系列冷压试验,以期扩大树皮粉活性增量剂在冷压胶合木制品方面的运用.在所作过的试验中,采用100目兴安落叶松、紫果云杉和冷杉树皮粉,这些物质之所以能作为活性增量剂,是因为这些树皮中的鞣质(即单宁)均系多元酚衍生物,它们能和尿醛胶 According to the local timber industry in many counties in our province, mass production of glued plowshares and glued glulam glued wood products was explored in our initial exploration of the successful application of bark powder as a urea formaldehyde flexible extender for plywood production , Made a series of cold pressure test, with a view to expanding the activity of bark flour extender in the cold-glued wood products in the use of the test made by 100 mesh Hyssop larch, purple spruce and fir trees Powder, the reason why these substances can be used as an extender of activity, because these bark tannins (tannin) are polyphenol derivatives, they can and urine glue