Caractérisation des papiers de finition et des panneaux de fibres de bois de haute densité (HDF) utilisés dans la production de plancher flottant
|Advisor:||Cloutier, Alain; Koubaa, Ahmed|
|Abstract:||Abstract The lamination of HDF panels is an important step in laminate flooring production. This operation involves technical challenges which require knowledge regarding HDF panel warping occurring during lamination. In this regard, the determination of the physical and mechanical properties of saturated lamination papers and HDF panels used in the production of laminate flooring is strategic. The specific objectives of this study were the determination of the contraction coefficient and modulus of elasticity in traction of saturated papers, in addition to the evaluation of HDF thermal conductivity. Three types of papers were studied (overlay, decorative paper, backer) in two directions (machine direction and cross direction) and at three pressing times (0, 10 and 20 seconds). For each combination, ten repetitions were made. The determination of thermal conductivity was established on 7 and 8 mm boards, which had a density of 871 and 918 kg/m3 respectively. Three temperatures were studied (100, 150 and 200°C) for the same temperature difference of 25°C. Three samples were analysed three times for each experimental condition. The type of paper had a highly significant impact on the contraction coefficient, which is higher in cross direction and increases with pressing time. This study has also shown that for a given paper, the modulus of elasticity in traction is higher in the machine direction and increases with pressing time. We have also established that the modulus of elasticity increases linearly with paper basic weight before impregnation and decreases linearly with resin content. Temperature had a significant impact on the thermal conductivity of HDF panels most likely due to panel moisture content variation during testing. Thickness and density of HDF panels did not have a significant effect on thermal conductivity.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||12 April 2018|
|Collection:||Thèses et mémoires|
All documents in CorpusUL are protected by Copyright Act of Canada.