Document Type : Research Paper

Authors

• asghar tarmian ¹
• Kazem Doosthosseini ²
• Seeyed Ahmad Mirshokraie ³
• Mohammadmehdi Faezi poor ²

¹ Associate Proffesor

² wood and paper science and technology department, of natural Resources faculty, university of Tehran. IRAN

³ Professor , Chemistry Department, Payame noor Univrsity.

Abstract

Beneficial utilization of large quantity of paper sludge from Mazandaran Wood & Paper Industry in particleboard manufacturing has been studied. Single-layer and three-layer particleboard (paper sludge as a surface layer) were produced. Urea-formaldehyde resin at two levels of 10 and 12 percent and paper sludge content at 4 levels, 0, 15, 30 and 45 percent were studied. Other factors such as press temperature (160^oC), press time (6minutes), mat moisture (12%), board density (0.75g/cm³) and etc were constant factors. Mechanical and physical properties including bending strength, shear strength, thickness swelling and water absorption after 2 and 24 hours immersion were evaluated. The results indicated that application of paper sludge reduced mechanical properties and improved thickness swelling .The particleboard produced with 15%paper sludge had the least water absorption, but by using more paper sludge, water absorption increased. Single-layer particleboard had higher bending strength. However, there was no significant different in shear strength between single and three layer particleboard. Three-layer particleboard showed lower thickness swelling.




 

Keywords

• Particleboard
• UREA-FORMALDEHYDE
• PAPER SLUDGE
• Bending strength
• Shear strength
• water absorption
• Thickness swelling

Main Subjects

• Pulp and paper
• Composite wood products