8. Other features

Figure 1 - The three cutting planes of a tree trunk

Figure 2 - Growth rings and woody rays

Figure 3 - Wood anisotropy

Figure 4 - Equilibrium wood moisture

Figure 5 - Wood warping during drying

Figure 6 - Panel structures to reduce or eliminate wood deformation during drying. The further down the figure, the more stable the panels.

Figure 7 - Wooden board assemblies

Figure 8 - Notched wood joints

Figure 9 - Substrate wetting, connection angle

Figure 10 - Strong hydrogen bonds between cellulose fibers and the —OH groups of a phenolic glue (dotted line).

Figure 11 - Chemical reaction of isocyanates with hydroxyl groups (—OH) in cellulose

Figure 12 - Characteristic diagrams of the various rheological behaviors of fluids

Figure 13 - Cold glue application tools for the wood industry

Figure 14 - Variation in the reactivity of a urea-formaldehyde adhesive mixed with two types of hardener

Figure 15 - Edgebander using hot-melt adhesive

Figure 16 - Progression of bond strength during setting time

Figure 17 - Effect of pressure and grammage on setting speed and mechanical strength when bonding with polyvinyl acetate glue (white vinyl glue)

Figure 18 - Wemhöner heating presses with multiple heating platens (source: Wemhöner, Germany)

Figure 19 - The five modes of mechanical stress on adhesive bonds

Figure 20 - Solid beech shear specimen (dimensions in mm) (in accordance with EN 205)

Figure 21 - Mixed assemblies of wooden parts