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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 4 Comparison between fibrillated bark slurry adhesives and fibrillated and freeze-dried bark adhesives

From: Plywood adhesives using PF resin with fibrillated bark slurry from radiata pine (Pinus radiata D. Don): utilization of flavonoid compounds from bark and wood. IV

Adhesives Fibrillated bark slurry adhesivefibrillated and freeze-dried bark adhesive2
CF11-11-21-31-41-51-62-12-22-32-42-52-6
Total solids content (%)55393330272421363530272421
Reactive components in adhesive (%)
 PF resin content32.027.319.815.010.87.24.225.221.015.010.87.24.2
 Polyflavanoid content0.06.26.97.98.58.98.95.77.47.98.58.88.8
Bonding test results
 Average of shear strength30.84 ± 0.21c1.06 ± 0.25ab1.07 ± 0.32a0.88 ± 0.25bc0.82 ± 0.21c0.81 ± 0.19c0.77 ± 0.22c1.04 ± 0.28ab1.13 ± 0.30a0.74 ± 0.15c0.71 ± 0.13c0.74 ± 0.24c0.70 ± 0.13c
 Average wood failure ratio387.2 ± 9.9ab72.2 ± 35.3abc76.9 ± 27.2abc65.3 ± 37.6bcd56.0 ± 26.0cde52.2 ± 39.0de78.1 ± 20.7abc89.1 ± 15.5ab90.9 ± 13.3a72.0 ± 33.3abcd32.5 ± 35.3ef21.9 ± 25.6f27.8 ± 28.6f
 Judgment of test results (JAS)4PASSPASSPASSPASSPASSPASSPASSPASSPASSPASSPASSPASSPASS
  1. 1“CF” means “Commercial formulation” refers to a composition of a commercial adhesive using PF resin for plywood
  2. 2All the results are described in the previous paper [13]
  3. 3ANOVA for analysis of variance showed that the means are significantly different (p < 0.001). The same letter within a row are not significantly different as determined by Tukey’s test (p < 0.05)
  4. 4“PASS” means met the criteria of JAS