UF/PMDI与PMDI胶黏剂制备轻质刨花板性能对比研究  

Study on the Performance of UF/PMDI and PMDI Adhesives for Preparing Light-weight Particleboards

作　　者：孙萍 张健 刘红光[1] 李黎[1] 罗斌[1] SUN Ping;ZHANG Jian;LIU Hong-guang;LI Li;LUO Bin(College of Material Science and Technology,Beijing Forestry University,Beijing 100083,P.R.China)

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《林产工业》2021年第6期7-12,共6页China Forest Products Industry

基　　金：中央高校基本科研业务费专项资金(2017JC11);国家自然科学基金项目(31770602)。

摘　　要：轻质刨花板常用聚合异氰酸酯(PMDI)作为胶黏剂,但其价格较高,因此研究采用脲醛树脂/聚合异氰酸酯(UF/PMDI)组合胶黏剂,与以杨木为主的不同形态的杂木刨花,制备8种不同结构形式的轻质刨花板,并对两种用胶情况下制备的轻质刨花板性能进行对比。结果表明:PMDI胶黏剂制备的轻质刨花板静曲强度、内结合强度、2 h和24 h吸水厚度膨胀率均优于组合胶黏剂制备的轻质刨花板,组合胶黏剂制备的单板贴面结构型轻质刨花板性能达到GB/T 4897—2015《刨花板》标准要求。Currently,diphenylmethane diisocyanate(PMDI)was usually used as adhesive in light-weight particleboards,but it was comparatively more expensive.Therefore,UF/PMDI composite adhesive was used to prepare eight kinds of light-weight particleboards,with different shapes of poplar-dominated wood particles as raw materials and the properties of light-weight particleboards prepared with two kinds of glue were compared.The results showed that the modulus of rupture(MOR),internal bonding(IB),2 h and 24 h thickness swelling(TS)of light-weight particleboards prepared by PMDI adhesive were better than that prepared by composite adhesive.The properties of light-weight particleboards with veneer structure prepared by composite adhesive could meet the requirements of GB/T 4897-2015 Particleboard.

关 键 词：轻质刨花板 脲醛树脂 聚合异氰酸酯 单板贴面 性能分析 

分 类 号：TS653[轻工技术与工程]