Preliminary Study on Preparation of Magnesium Oxychloride Adhesive for Plywood
Orthogonal experiments were conducted to optimize the raw material ratio and plywood preparation process with magnesium oxychloride adhesive.The performance of the synthesized magnesium oxychloride adhesive and plywood were analyzed.The results showed that the selected magnesium oxychloride adhesive could be used as a wood adhesive,which penetrated the internal pores of poplar veneer,forming a mechanical bonding structure.However,the wet bonding strength of plywood did not yet reach the requirement of≥0.7 MPa for type Ⅲ plywood in the National Standard of GB/T 9846-2015 Ordinary Plywood.The analyses proved that the content of 518-phase crystals determined the strength and water resistance of magnesium oxychloride adhesive.The internal structure of the adhesive was relatively loose.The state of 518-phase crystals is an important influencing factor.It is necessary to change the crystal state of 518-phase crystals or block water molecule channels.It will prevent them from contacting water molecules,thereby improving the various properties of magnesium oxychloride adhesive and promoting industrial application.
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维普
