几种树种木材制造石膏刨花板的适应性

本文论述了挪威云杉、山杨、白桦和柞木及山杨、白桦、柞木的混合刨花制造石膏刨花板的适应性。结果表明,在工艺参数相同的情况下,木材密度越大的树种制成的板材强度越低,挪威云杉板强度最大,山杨板次之,柞木板极低。挪威云杉和山杨是制造石膏刨花板的优质树种。改变木膏比、刨花体积和对刨花进行水抽提均没有使白桦和柞木制成合格的石膏刨花板。混合刨花干扰石膏刨花板的凝固时间,致使板子强度低劣,在生产中应予避免。

Compatibility of some wood species to the manufacfura of gypsum-bonded particleboard

In this article, the compatibility of Populus davidiana, Betula plotyphylla, Quercus mongolica and Picea abies as well as the mixture of the former three species with the manufacture of gypsum-bonded particleboard was studied At same technical parameters, the gypsum-bonded partieleboard made of the lower density species with higher MOR, i. e. spruce board is the strongest, then poplar and birch, the board made of oak is the weakest. Spruce and poplar are suitable species for the manufacture of gypsum-bonded particle-board But the qualified birch and oak boards were not obtained even through the change of wood-gypsum ratio and wood particle Volume, water extraction of wood particle. Mixture of various wood species will not only offset the hydration time, but also make the quality of gypsum-bonded partieleboard unstable, which should be avoided in practice.