单板/HDF复合木地板的制造工艺与产品性能研究

单板/高密度纤维板(HDF)复合木地板结合了实木地板和浸渍纸层压木质地板的优点,是地板产业发展的新方向之一。文中以12mm厚HDF为基材、复合意杨单板,试制了"耐磨纸-单板-HDF基材-平衡纸"四层结构地板用复合板材。研究了不同单板厚度、胶黏剂种类(聚氨酯-PU,脲醛树脂-UF)及涂布量对板材翘曲度、吸水厚度膨胀率、内结合强度及机加工性能的影响。结果表明:1)单板与HDF复合制造木地板是可行的;2)复合木地板的翘曲度随单板厚度和施胶量的提高而递增,最高可达约0.6%;3)贴面采用聚氨酯胶黏剂,产品性能优于脲醛树脂胶合板材,但冷压周期偏长。推荐工艺条件为:单板1.2mm,PU或UF胶黏剂均可,涂布量控制在100g/m~2左右。

A Study on Manufacture and Performances of Veneer/HDF Composite Laminate Flooring

Veneer/HDF composite laminate flooring(VCLF) is a new floor product in collection of advantages of both solid wood and impregnated paper overlaid laminate flooring(IPLF).Four-layer VCLF was made of wear-resisting paper,poplar veneers,12mm-thiek HDF,and balance paper.Influences of different veneer thickness,adhesive types(PU,UF),and resin contents on the flooring properties(including warping,thickness swelling,inner bond strength,and machining performance) were explored.Test results showed that:(1) manufacture of VCLF was technically feasible;(2) warping of the flooring was increased with veneer thickness and/or resin content increasing, its max value was up to about 6%;(3) PU-glued VCLFs showed better performances than UF-bonded products, while it costs longer cold pressing time.Recommended processing conditions were:veneer thickness 1.2mm, PU or UF adhesive at a content spread of about 100g/m~2.