Drvna industrija, Vol. 69 No. 4, 2018.
Izvorni znanstveni članak
https://doi.org/10.5552/drind.2018.1768
Investigation of the Effects of Heat Treatment Applied to Beech Plywood
Aurel Lunguleasa
; Fakultet drvne industrije, Transilvanijsko sveučilište Brašov, Brašov, Rumunjska
Nadir Ayrilmis
; Šumarski fakultet, Sveučilište u Istanbulu-Cerrahpassa, Istanbul, Turska
Cosmin Spirchez
; Fakultet drvne industrije, Transilvanijsko sveučilište Brašov, Brašov, Rumunjska
Ferhat Özdemir
; Šumarski fakultet, Kahramanmaras Sutcu Imam Sveučilište, Kahramanmaras, Turska
Sažetak
The aim of this study is to determine the effects of heat treatment on some physical and mechanical properties of beech plywood boards. The 3-layered beech plywood boards with a thickness of 3.9 mm were subjected to heat treatment for 1, 2 and 3 hours at temperatures of 160, 180 and 200 °C. These beech plywood boards were tested for physical properties such as density, water absorption and thickness swelling, mechanical property tests such as modulus of rupture (MOR) and Brinell hardness, and mass loss rates according to the relevant standards. The results obtained show that the hydrophobicity of beech plywood boards is improved but the strength and weight loss are adversely affected, depending on the temperature and duration of heat treatment. It has been found that beech plywood boards heat-treated at 200 °C for 3 hours can be used in very humid environments for average mechanical stresses of wood parts with a reduced thickness swell of 4 % and a reduced water absorption rate of more than 12 %.
Ključne riječi
plywood; heat treatment; mass loss; swelling; Brinell hardness; water absorption
Hrčak ID:
214045
URI
Datum izdavanja:
28.12.2018.
Posjeta: 1.615 *