Determining the Resistance to Delamination of Wood Adhesives using a Vacuum Pres- sure Impregnation Method

to Oy. The purpose of the thesis was to study the delamination of glued solid timber and glulam, glued with moisture cured one component polyurethane adhesives (1K PUR) and an emulsion polymer isocyanate adhesive (EPI) using the new easyQ DLA appliance. Delamination is the failure of the adhesive layer between wood lamellae, used to produce glued solid timber and glued laminated timber (glulam). Delamination tests are accelerated weather exposure tests which aim to simulate the stresses over the lifetime of a glued timber structure. From July 2013, glued solid timber and glulam produced in Finland has to be CE-marked. This means production must be covered by the harmonized EN 14080 standard, which includes the quality control standard EN 391 as well as the adhesive evaluation standard EN 302-2. Currently, 1K PUR adhesives can be used for glued solid timber and glulam production. In the final draft of the FprEN 14080:2013 standard, EPI adhe-sives can also be used, though only for service class 1 & 2 applications. Parallel EN 391 quality control samples, provided by Kontio, were tested in two differ-ent drying chambers and four different conditions. The objective was, to evaluate th