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Abstract
In order to determine the best curing conditions of silicate wood adhesive, three different curing conditions, i.e. room temperature, moderate temperature, and high temperature were chosen to prepare poplar plywood with silicate adhesive and poplar veneer as raw materials. The optimised curing technology was obtained based on a lot of experimental analysis using the single factor test method and orthogonal test method. The research results showed that the curing conditions have obvious influence on the bonding properties. Compared with the samples which were cured at moderate or high temperature, the specimens cured at room temperature have higher bonding strength and water resistance. The dry and wet bonding strength of poplar plywood prepared from optimised curing technology was 0·89 and 0·61 MPa, respectively, and 24 h thickness swelling rate was 5·6%, these properties reached the Chinese National Standard of II Grade Plywood.
Acknowledgements
This work was supported by National Forestry Significant Special Fund for Public Welfare Industry (Grant No. 201204704), National Natural Science Foundation of China (Grant No. 31300485), Specialised Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20124321120001), Hunan Provincial Natural Science Foundation of China (Grant No. 13JJ4085), China Postdoctoral Science Foundation funded project (Grant No. 2012M521570), Hunan Provincial Science and Technology Planning Project Foundation (Grant No. 2012NK3108), and Youth Scientific Research Foundation of Central South University of Forestry and Technology (Grant No. QJ2011011A).