摘要
用１５５ＭＰａ的饱和蒸汽分别对刨花处理４分钟，对纤维处理２５分钟后模压凸型刨花板和纤维板。试验表明，采用蒸汽预处理的刨花和纤维压制的凸型板，其尺寸稳定性大大提高；当酚醛树脂用量在２５％～７５％之间时，随着树脂用量增加，凸型刨花板经冷水浸泡后的吸水厚度膨胀率降低，而线性膨胀率基本与树脂用量无关。
In this paper,molded panels made of particles or fibers pre treated with steam was studied.Wood particles and fibers were treated with saturated steam at a pressure of 1 55 MPa for 4 min and 2 5 min respectively before molding.Testing results showed that the molded panels made of steam pre treated furnish had higher dimensional stability than that of control panels.Linear expansion of the panels made of treated particles,after cold water soaking treatment,was virtually dependent on resin consumption.Thickness swelling rate of the panels made of treated particles was reduced along with resin consumption increased in the range of 2 5%～7 5%。
出处
《木材工业》
北大核心
1998年第5期40-42,共3页
China Wood Industry
关键词
蒸汽预处理
凸型板
尺寸稳定性
人造板
刨花
Steam pretreatment
Molded wood based panels
Dimensional stability
