3.Machining and processing HPL
Dispersion adhesives generally use water as the mobile phase (dispersing agent) which contains the adhesive components as a dispersion. The water content generally lies between 40 and 70 weight percent. After application to the surface to be bonded, the dispersing agent penetrates into the work pieces or evaporates into the environment or the pH value changes, causing the dispersion to break. This causes the adhesive components to make contact and form a film which can connect the two work pieces. Today, aqueous dispersion adhesives are often used as a substitute for solvent adhesives. They are neither a fire or explosion hazard nor do they release solvents. However, water-based adhesives require more time or more energy for hardening
Dispersion adhesives are e. g.:
Low and even application of adhesives as well as compliance with the pressing temperatures and times have to be ensured.
