ADHESIVE PENETRATION IN LAMINATED OIL PALM TRUNK VENEER

• Published in: Journal of tropical forest science Vol. 25; no. 4; pp. 467 - 474
• Main Authors: Zalifah, M Siti, Hamid, S Abdul, Izran, K, Mansur, A, Nazip, S Mohd
• Format: Journal Article
• Language: English
• Published: Forest Research Institute Malaysia 01-10-2013
• Subjects: Adhesive bonding; Adhesives; Hot pressing; Parenchyma; Phenols; Plywood; Timber; Tree trunks; Tropical forests; Veneers
• ISSN: 0128-1283

This study investigated the bond formation of formaldehyde adhesives impregnated into laminated oil palm trunk (OPT) veneer. Adhesives used for the study were phenol formaldehyde (PF) and urea formaldehyde (UF). The adhesive penetration was determined through effective penetration, average penetration and maximum penetration at different hot pressing temperatures (125 and 130 °C for PF, 115 and 125 °C for UF), OPT portions (top and bottom) and OPT veneer parts (outer and inner). In general, adhesive penetrations using PF and UF adhesives were significantly different between veneer parts, hot pressing temperatures and portions. These results showed that temperature and porosity of veneer surfaces influenced adhesive penetration. Kajian ini menyiasat pembentukan ikatan perekat formaldehid dalam venir batang kelapa sawit berlaminasi. Perekat yang digunakan dalam kajian ini ialah fenol formaldehid (PF) dan urea formaldehid (UF). Penembusan perekat ditentukan melalui penembusan berkesan, purata penembusan dan penembusan maksimum pada suhu penekanan panas yang berbeza (125 °C dan 130 °C untuk PF, 115 °C dan 125 °C untuk UF), bahagian batang kelapa sawit (atas dan bawah) dan bahagian venir (luar dan dalam). Secara umum, penembusan perekat menggunakan PF dan UF berbeza dengan signifikan antara bahagian venir, suhu penekanan panas dan bahagian batang kelapa sawit. Keputusan menunjukkan bahawa suhu dan keliangan permukaan venir mempengaruhi penembusan perekat.