Table 1. Adhesives used in this study

Adhesive Brand name Manufacturer
Polyurethane (PU) MPU500/HH60 Okong
Poly(vinyl acetate) (PVAc) Ssangkom 701 Ssangkom
Phenol-resorcinol-formaldehyde (PRF) resins
Melamine-formaldehyde (MF) resins M-60 Taeyang Chem.
Urea-formaldehyde (UF) resin UR 40 Taeyang Chem.