复合胶合板的研究——Ⅰ.组成部分对复合胶合板特性的影响

<正>本文主要是研究在实验室条件下,Ⅰ-69杨作为复合胶合板原料的可能性以及单板、刨花和胶粘剂等复合胶合板组成部分对其特性的影响。 研究结果表明:1)Ⅰ-69杨作为复合胶合板的原料是可行的。2)表板厚度、刨花尺寸和施胶量对复合胶合板的特性有着显著的影响,其合适工艺参数为:单板厚度1.2-1.8mm,刨花尺寸0.45×5-7×70mm,施胶量 9％。 本文还对试件静曲破坏形式进行了初步探讨。

A STUDY OF COMPOSITE PLYWOOD I. INFLUENCES OF MATERIALS ON PROPERTIES OF COMPOSITE PLYWOOD

Tests at a laboratory-scale of a hybrid poplar, I-69 (Populus deltoides cv. ’Lux’ I -69/55) as the raw material of composite plywood have been made and influences of materials such as veneer, strand, resin, etc., on the properties of composite plywood studied.By orthogonal joint, single-layer veneers were used for both surfaces, oriented single-layer mat was used for core and urea-formaldehyde resin for binder, and then a composite plywood of 300×300×10mm was made by one step. Seven basic properties, i. e., moisture content, specific gravity, MOR, MOE, IB, thickness swell after water absorption and relative nail-holding power were tested.Experimental results show: 1, It is feasible to use I -69 as raw materials of composite plywood. 2, Properties of composite plywood can be considerably affected by three factors: surface veneer thickness, strand size and resin content. Suitable technological parameters should be: face veneer thickness 1.2-1.8mm, length × width × thickness of strand 70×5-7×0.45mm, resin content 9%.Analyses have also been made for the types for failure in static bend.