摘要
设计了3种超低游离甲醛含量的三聚氰胺-尿素-甲醛(MUF)树脂基本工艺配方,合成和调配MUF树脂胶黏剂,用于生产超低甲醛释放量地板基材,并压贴强化木地板,检测分析树脂、地板基材及其强化木地板质量指标。结果表明,采用物质的量之比F/(U+1.5M)=0.83、三聚氰胺添加量7.0%~8.0%(占液体树脂的总质量)、尿素与三聚氰胺分3次添加的工艺配方,合成MUF树脂,其综合性能最佳,对应的地板基材的内结合强度(IB)、静曲强度(MOR)、吸水厚度膨胀率(TS)均达到现行地板基材标准要求,甲醛释放量能够稳定控制在3.5 mg/100 g以下,对应的强化木地板的吸水厚度膨胀率在14%以下,甲醛释放量为0.3~0.4 mg/L。
Tliree kinds formulae for MUF resin with low free formaldehyde content were prepared for MDF flooring samples.The quality performance for the resins,substrates and the laminate floorings were tested and analyzed.The results indicated that the optimum synthesis condition for MUF resin were obtained as follows:molar ratio of formaldehyde to urea and 1.5 times melamine0.83:1.weight fraction of melamine 7.0%~8.0%.adding urea and melamine three times over.The performance of the corresponding fiberboard,such as IB,MOR and TS,all met the standard requirement,and the formaldehyde emission was less than 3.5 mg/100 g.TS of the corresponding laminate flooring was less than 14%,and formaldehyde emission was within 0.3~0.4 mg/L.
出处
《中国人造板》
2016年第9期10-13,共4页
China Wood-Based Panels
