[< 전시-P-66 >] The Effect of Spraying Adhesive Technique on Particleboard Properties = [< 전시-P-66 >] The Effect of Spraying Adhesive Technique on Particleboard Properties

다국어 초록 (Multilingual Abstract)

The objective of the research was to evaluate the effect of technical spraying adhesive on physical and mechanical particleboard using UF and Isocyanat mixture. UF/Isocyanat ratio used in this experiment was 70/30 (%w/w). There were five type of technical spraying for the treatments namely A (UF resin was applied in core resin and Isocyanat for surface resin), B (Isocyanat resin was applied as core resin and UF for surface resin), C (Isocyanat resin was sprayed in the first then followed by UF resin), D (UF resin was sprayed in the first then followed by Isocyanat resin), and the last E (UF and Isocyanat had mixed before spray). Boards produced with size of 25 by 25㎠, the density and board thickness target were 0.75gcm^-3 and 1cm respectively. Hot press was set in 140℃ temperature for 10 minutes and 30kgcm^-2 pressures. Seven days required for conditioning of board after pressing process. The results showed that board type of D resulted the best dimensional stability. It was described by the smallest value of thickness swelling and water absorption. For the mechanical properties parameters, board type of “B” resulted the best bending and internal bond properties. The present of Isocyanat in UF resin resulted in improvement of dimensional stability and mechanical properties of particleboard.