摘要
以聚乙烯醇(PVA)和三聚氰胺为改性剂,制备出一种环保型UF(脲醛树脂)胶粘剂。探讨了三聚氰胺的添加方式(包括其添加量、初期和中期投入比例等)对UF性能的影响。结果表明:在试验工艺条件下,当w(总三聚氰胺)=6%(相对于尿素质量而言)、w(前期三聚氰胺)=1%和w(中期三聚氰胺)=5%时,胶合板的甲醛释放量(0.27 mg/L)相对最低,胶接强度(0.71 MPa)达到II类板的标准要求;当w(前期三聚氰胺)=w(中期三聚氰胺)=3%时,胶合板的胶接强度(0.76 MPa)相对最高,但甲醛释放量(0.56 mg/L)只能达到E1级标准要求。
With polyvinyl alcohol （PVA） and melamine as modifiers, an environment-friendly UF （urea-formaldehwte resin） adhesive was prepared. The influences of feeding mode of melamine（including adding contents, adding proportions of initial and medium term） on properties of UF were discussed. The resuhs showed that the formaltehyde release （0.27 mg/L） was relatively lowesl, and bonding strength （0.71 MPa） could meet standard requirement of Ⅱ class board for plywood under process conditions of experiment when mass h＇aetion of total melamine was 6% in urea,and mass fractions of melamine at initial and medium term were 1% and 5% respectively. The bonding strength （0.76 MPa） was the relatively highest but its formaldehyde release（0.56 mg/l,） could only meet standard requirement of E, grade for plywood when mass fractions of w （melamine at initial term） and w（melamine at medium term） were all 3%.
出处
《中国胶粘剂》
CAS
北大核心
2012年第12期37-40,共4页
China Adhesives
基金
黑龙江省博士后科研启动资助项目(415181)
关键词
三聚氰胺
添加方式
脲醛树脂
胶粘剂
甲醛释放量
胶接强度
melamine
feeding mode
urea-formaldehyde resin（UF）
adhesive
formaldehyde release
bonding strength
