Title: Study on bonding properties of ACQ preserved plywood
Abstract: The aim of this work is to investigate the effect of preservative ammoniacal copper quaternary(ACQ) treated wood(masson pine and poplar veneer) on adhesion properties of phenolic formaldehyde(PF) adhesive and urea formaldehyde(UF) adhesive.It was found that the effect of preservative retention of veneers on bonding strength was insignificant when preserved veneers bonded with PF.The ACQ retention in masson pine veneer and poplar veneer were 7.81 and 15.54 kg · m-3,the optimum bonding strength reached up to 1.50 and 1.69 MPa,respectively.The effect of preservative retention of poplar veneers on bonding strength was insignificant but preservative had negative effect on masson pine when preserved veneers bonded with UF.The optimum bonding strength of poplar plywood was 1.60 MPa when ACQ retention was 8.75 kg · m-3,while all the masson pine plywood had bonded failure vs.the Chinese National Standard for interior plywood when the masson pine veneer was soaked in ACQ solution.When soaked in boiling water or dried in oven at low temperature after soaked in ACQ solution,the highest bonding strength of plywood which produced from such masson pine veneer bonded with UF adhesive had significantly improved to 1.32 MPa and 1.03 MPa,respectively.This is due to the extractives of masson pine veneer were removed or some chemical reactions between ACQ and extractives were stopped during the treatment process.Hence,the effects of ACQ on masson pine plywood bonded by UF adhesive were decreased.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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