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This study used a vibration test method to show that grain angles of face veneer have substantial effects on sound velocities and dynamic Young’s moduli of three types of wood-based composites. The sound velocity at 0° grain angle of face veneer was the highest, and it decreased with increasing grain angle in the range of 0° to 90°. This tendency was similar to that for dynamic Young’s modulus. The...
Wood plastic plywood (WPPW), composed of veneer and styrofoam, was manufactured without special adhesives such as urea–formaldehyde or phenol–formaldehyde resins, and its vibrational properties were investigated. WPPW can be produced at 1 MPa and 160°C for 9 min (three-ply) and 12 min (five-ply). The dynamic Young’s modulus reached its highest value when the styrofoam thickness was 30 mm. The sound...
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