Influence of technological factors on the bonding strength of wood joints, formed on the basis magnetically treated adhesives

Abstract

In modern wood processing enterprises a significant amount of the finished product is products made of laminated wood. Gluing operations are used for the production of plywood, boards flooring, furniture, bearing and protecting designs and especially housing construction. The main requirement for the products of laminated wood is the strength of the bond. The currently used technologies of gluing of wood joints do not meet the requirements of the customer on the strength characteristics of the finished product. In this paper the technological method is considered, which is on the basis of the effect of increasing the bonding strength of wood joints, formed on the basis of the adhesives used in wood processing subjected to modification by exposing the adhesive by constant magnetic field. The influence of the main technological factors is studied influencing the formation of adhesive joints based on adhesives modified by the influence of the magnetic field. The effect of the field strength, the time of its exposure, pressure and temperature was established experimentally. It is shown that magnetic field intensity has the dominant influence on the strength of adhesives. It was also found that during the action of the magnetic field on the glue with a hardener from 2 to 10% by weight, limit of the bonding strength is higher than for the untreated adhesive. These data shown in the research allow the creation of laminated wood with increased strength.