CREATING DURABLE WOOD GLUE STRUCTURES BASED ON PHYSICOMODIFIED ADHESIVES

In the past few decades, gluing technologies have been widely used in woodworking, which significantly expand the range of new products. Bonding of products with adhesives is used in the manufacture of furniture, parquet, load-bearing and enclosing structures, door and window blocks, prefabricated houses and many other products. The main criteria for the quality of glued wood joints is the cohesive and adhesive strength of the glued joint. To date, a number of technologies have been developed to improve the strength of glued wood joints. In order to increase the strength of the adhesive bond of wood, technologists propose methods of variation by such factors as temperature, pressure during curing of the adhesive joint, the purity of the surface treatment of substrates, and the thickness of the adhesive layer. A large amount of work and substantial financial costs are spent on creating new brands of adhesives. However, the requirements for glued timber products are not solved by the proposed gluing technologies and new brands of glues. First of all, this concerns the widely used glue wood structures (CDC), as a rule, operating in difficult conditions with high mechanical loads. To solve the problem of increasing the reliability of glue wood structures, instead of domestic imported, but more expensive adhesives are often used. To a certain extent, the creation of more high-strength adhesive joints has recently also been solved by the use of methods for modifying domestic adhesives exposed to irradiation with magnetic and electric fields, as well as ultrasound.