【摘要】 用苯酚－甲醛（ＰＦ）和苯酚－尿素－甲醛（ＰＵＦ）树脂代替聚甲醛作交联剂配制单宁胶，系统地进行了交联剂用量、ｐＨ值及涂胶量、陈放时间、热压温度和时间等胶压工艺条件压板试验。在此基础上压制了６０×６０ｃｍ椴木、马尾松胶合板，证明该单宁胶压制的板符合ＧＢ９８４６．４－８８标准中Ⅰ类胶合板的质量要求。更多还原

【Abstract】 Wattle tannin adhesives were prepared by substituting paraformaldehyde with PF and PUFresins as cross-linking agent.The formulations(amount of cross-linking agent and pH value)and plywoodpressing conditions (glud spread,assembly time,hot press temperature and hot press time)were studied inlaboratory.Based on that,Tilia sp,and Pinus,massoniana plywoods of dimensio 60×60 cm were madewith wattle tannin adhesives. The results show that bonding strength of the plywoods meets the require-ments of GB 9846.4- 88 for the first grade plywood.更多还原