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Table 1 Average results of the shear strength and percent of wood failure for the treatments, dry, humid, boiling and cycle

From: Evaluation of pressing time in the production of edge glued panel with adhesive polyurethane derived from castor oil

Treatment Pressing time (h) Shear strength (MPa) Wood failure (%)
Average 5th percentile lower
Dry 2 2.38 c (49.16) 1.38 1
4 8.60 b (12.03) 7.53 99
8 9.53 ab (10.24) 8.34 79
24 9.96 a (10.06) 8.43 83
Humid 2 2.97 b (52.28) 1.32 8
4 5.16 a (6.12) 4.31 26
8 5.01 a (13.90) 4.42 30
24 5.47 a (10.15) 5.09 34
Boiling 2 1.54 c (49.50) 0.74 2
4 4.01 b (15.85) 2.99 27
8 4.93 a (11.88) 4.12 39
24 4.64 ab (5.54) 4.34 36
Cycle 2 1.68 b (51.80) 0.56 5
4 4.19 a (14.05) 3.40 35
8 4.85 a (17.09) 3.71 41
24 4.46 a (12.97) 3.76 10
  1. Averages followed by the same letter in each pre-treatment did not differ significantly by Tukey test at the level of 95 % reliability
  2. Results in parentheses refer to the coefficient of variation
  3. Values in italics meets the requirements of EN 13354: 2003 (5th percentile ≥2.5 MPa)