论文部分内容阅读
一、前言木材酸度(pH值)是木材的化学特性之一,也是胶合板与刨花板生产工艺中的一个重要指标。木材的pH值对于胶合剂的固化和决定固化剂的加入量起着重大的作用。木材中的碱性物质不利于脲醛树脂胶的固化,而酸性物质含量却与刨花板上垂直于板面的拉伸强度成直线关系,即酸性物质含量多(或pH值小)时,其拉伸强度大。木材的酸度对于决定木材的使用范围有很大的影响。Gray发现低pH值的木材可以腐蚀金属构件
I. Introduction Wood acidity (pH) is one of the chemical properties of wood, but also plywood and particleboard production process is an important indicator. The pH of the wood plays a significant role in the curing of the cement and in the amount of curing agent added. Alkali wood in the material is not conducive to the curing of urea formaldehyde resin, but the acidic material content with the particleboard perpendicular to the tensile strength of the board has a linear relationship, that is, when the content of acidic substances (or pH value), the tensile Strong intensity. The acidity of wood has a great influence on the range of wood used. Gray found that low pH wood can corrode metal components