The objective of this research is to evaluate the effect of adhesive types on dimensional stability of bamboo-oriented particleboard. The materials used in this research are bamboo tali(Gigantochloa apus J.A & J.H. Schult. Kurz), UF/MDI(8, 10, 12 % level), and MF, MDI, and PF at 7 % level. Particle and adhesive are mixed using a blending machine; then, mat forming and hot pressing processes are performed using adhesive-suitable temperature and time references. MDI resin is set at 160 ºC temperature for 5 minutes. PF resin and MF resin are pressed at 170 ºC for 10 minutes, and 140 ºC for 10 minutes, respectively, while UF/MDI sets at temperature of 140 ºC for 10 minutes. The results show that particleboard using PF resin produces the lowest thickness swelling value. The particleboard using UF/MDI resin also produces good response for thickness swelling value. Interesting things happen in that UF/MDI adhesive produces a thickness swelling value better than that of MDI resin. FTIR analysis on particleboard bonded by UF/MDI resin combination shows the presence of carbonyl group C=O vibration on multi substitution of urea at wave number of around 1,700 cm-1.

Abstract
 1. Introduction
 2. Experimental
  2.1 Materials
  2.2 Methods
 3. Results and Discussions
  3.1 Density and Moisture Content(MC) of Boards
  3.2 Thickness Swelling(TS) and Water Absorption(WA)
  3.3 Internal Bond
 4. Conclusion
 References

• Apri Heri Iswanto(Universitas Sumatera Utara, Padang Bulan) Corresponding author
• Rensus Munthe(Universitas Sumatera Utara, Padang Bulan)
• Atmawi Darwis(School of Life Sciences Technology, Institut Teknologi Bandung)
• Irawati Azhar(Universitas Sumatera Utara, Padang Bulan)
• Arida Susilowati(Universitas Sumatera Utara, Padang Bulan)
• Dita Sari Prabuningrum(Graduated School of Bogor Agricultural University)
• Widya Fatriasari(Research Center for Biomaterials LIPI)