Studies of the Cracking Behaviour of High-Pressure Laminates

The European standard EN 438-2 (2019) describes a method to assess the resistance cracking of high-pressure laminate (HPL). In setup, samples’ shrinkage at temperature 50 °C for 6 h is restrained by metal clamp. resulting tensile stress may lead laminate. With intention gain additional insight into parameters and influencing factors test, 43 laminates was tested in accordance with prolonged testing time. Additionally, strength were determined under conditions test. test uses free (laminates not glued carrier board), so order correlate results applications that are close real-life situations, four also when boards size furniture doors. this full factorial particle board gypsum used as boards, UF PVAc adhesives, possible adjusted two moisture laminates. turned out be mainly influenced composition Thin pure paper backing especially prone setup. Within storage did reach equilibrium. Prolonged until equilibrium reached (which took up 10 days) allowed an improved differentiation resistance, thicker Four on wooden mineral-based either or adhesive contents following identified critical combination cracking: low according non-hygroscopic board, increased before being use adhesive.