不同热压方式下桦木重组材的密度分布  

Density Distribution of Reconstituted Birch Lumber with Different Hot Pressing Processes

作　　者：陈勇平[1] 王金林[1] 李春生[1] 

机构地区：[1]中国林科院木材工业研究所；国家林业局木材科学与技术重点实验室,北京100091

出　　处：《木材工业》2010年第1期8-10,22,共4页China Wood Industry

基　　金：“十一五”国家科技支撑计划(2006BAD18B06);引进国际先进林业科学技术创新项目(2006-4-C04)

摘　　要：以人工林桦木单板为试材,浸渍三聚氰胺甲醛树脂、组坯后,采用高频和接触两种方式热压成型,探讨热压方式对重组材密度分布的影响。研究结果表明:不同热压方式下,重组材在长度、宽度方向,以及厚度方向上的密度分布存在一定差异。综合考虑剥离强度指标,制备厚度>30mm重组材,宜采用高频热压方式。Birch veneers impregnated with melamine-formaldehyde resin （MF） were used to make reconstituted lumber. Two hot pressing methods, high-frequency and traditional hot-platen, were used and their influences on the density distribution of reconstituted birch lumber was analyzed. The results showed different heat transfer due to the different hot pressing methods and had considerable impact on the density distribution in the length, width and the thickness directions. Thus, when producing reconstituted lumber with thickness above 30 mm, we recommend using a high frequency hot-pressing method to maintain a uniform density distribution.

关 键 词：桦木重组材 高频热压 接触式热压 密度分布 

分 类 号：TS653[轻工技术与工程]