Finger jointing of freshly sawn Norway Spruce side boards : a comparative study of fracture properties of joints glued with phenol-resorcinol and one-component polyurethane adhesive
Finger jointing of unseasoned Norway Spruce was studied with respect to tensile strength, adhesive penetration and durability. Finger joints were manufactured with 1) unseasoned wood and one component polyurethane (PUR) adhesive, 2) dried wood and PUR adhesive and 3) dried wood and phenol resorcinol formaldehyde (PRF) adhesive. Two levels of wood density were used. The tensile strength of the fing