Thermo-veneer for improving Teak (Tectona grandis L. fil.) ply-wood product made from plantation in Lao. P.D.R

Name: Douangta Bouaphavong

LCSH: Kasetsart University -- Dissertations. Ph.D. (Forestry) 2022

Classification :.LCCS: SD397.T4

LCSH: Kasetsart University. -- Faculty of Forestry -- Dissertations

LCSH: Teak

LCSH: Teak -- Plantation -- Laos

LCSH: Wood products

Abstract: Douangta Bouaphavong 2022: Thermo-Veneer for Improving Teak (Tectona grandis) Plywood from Plantation in Lao. P.D.R. Doctor of Philosophy (Forestry), Major Field: Forestry, Faculty of Forestry, Kasetsart University. Thesis Advisor: Associate Prof. Songklod Jarusombuti. M.Sci. 104 pages. The teak thermal treatment in high temperatures is environmentfriendly. This study focuses on 1) Assessing teak log recovery rate by spindles lathe, 2) To investigate the effects of teak veneer thermal treatment, 3) To assess of physical and mechanical properties of thermal teak plywood, and 4) To assess biological resistances of thermal teak plywood. The age of teak logs plantation was 18 years old, peeled by spindleless lathe machiner, the tolerance conducted by TCVN 10316:2014 and LYT 1599:2011. The veneer peeled was cutting size 40x40 cm and thermal treatment by hot press machine in different level of temperature at 180, 200, 220, and 240 °C, based on length of time on 4, 8, and 12 min The two adhesives including PF and UF. Teak thermal treatment plywood was testing density, swelling, water absorption, SG, MOR, MOE, shearing strength, hardness, chemical composition, and termite. The Data analysis used One-way ANOVA, linear regression, and a multiple regression model. The result showed recovery rate was 56.07% according to conversion factor CF was 1.91(50.23%) in average yield between input volume of log and veneer volume, teak logs thinned from plantation first thinning and thinning were low quality as too many knots, most logs irregularly and some log was decay. The temperatures were 180, 200, 220, and 240 °C applied at three different lengths of time, i.e., 4, 8, and 12 min on teak veneer sheets. The results showed that the mass loss at the temperature of 180, 200, 220, and 240 °C was not significantly different. Thermal plywood density for PF the control decreased significantly at different levels of temperature and UF was not significant. WA was not improving plywood product, and swelling was less than 5 %, MOR control was significantly different with different levels of temperature and length of time. MOE effected decreasing significant differences in different levels of temperature and time length. Shearing strength was length of time significantly different. The hardness is not significant.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Songklod Jarusombuti

Role: Thesis Advisor

Name: Teera Veenin

Role: Thesis CO-Advisor

Name: Khamtan Phonetip

Role: Thesis CO-Advisor

Created: 2022

Modified: 2025-07-27

Issued: 2025-07-27

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2565/douangta-bou-all.pdf

CallNumber: SD397.T4 .D681

eng

Spatial: Laos

DegreeName: Doctor of Philosophy

Level: Doctoral Degraee

Descipline: Forestry

Grantor: Kasetsart University

©copyrights Kasetsart University

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