用电子显微镜研究干法无胶硬质纤维板的结构

用扫描电子显微镜对未浸水和浸水后的干法无胶硬质纤维板进行观察，以获得有关无胶纤维板内在结构的变化，这可以更好地了解无胶纤维板的强度和耐水性能，在制造纤维板过程中，通过热磨使木材纤维在胞间层分离，并在热压时受压力作用再次结合，纤维重新结合的状况决定了纤维板的物理力学性能，经电镜观察的无胶纤维板，纤维间相互交织且结合紧密，即使是浸水后，纤维间的结合仍未出现松散现象，这表明不施加胶粘剂制造的干法硬质纤维板可以具有优越的强度和耐水性能。

THE STRUCTRE OF DRY-PROCESSED BINDERLESS HARDBOARDS STUDIED BY ELECTRON MICROSCOPY

Water-unsoakes and Water-soaked dry-procesed binderless hsrdboards sre observed by scanning electron microsope to acquire informations on the binderless hardboardinternal structure.This may be helpful in a beter understanding of strength and water proof properties of the binderless hardboard.In nanufacturing hardboard ,he wood fibers break apart at the middle lamella and come in contact again when subjected to pressure during hot-pressing.The physical and mechanical properties of the haraboaed areconditioned bg coming in conact extent again of wood fibers.Electron microscopical observations on the inderless hardboards show that the wood fibers are omtercrossed and bonded xlosely.even if water-soaked,he bond of the wood fibers does not appera a loose siuation.The result of the electron microscopy study shows the dry-procesed hardboard winthout any adhesive Subtances can possess superior strength and waterproof properties.