Fig. 5
From: Modifying elastic modulus of two-component polyurethane adhesive for structural hardwood bonding
Boxplots of tensile shear strength (mean value marked as cross) and wood failure (triangle) after treatment A1, A2, A4 and A5 for the adhesives 2C PUR modified with 60% filler, 1C PUR, PRF and the solid wood reference (\(n\) = 15). Boxplots indicate median, interquartile range and minimum and maximum are shown as whiskers. Red line marks standards requirement for each treatment according to EN 302-1