ABSTRACT

Recently, research and development works have expanded to include the application of electrostatic powder coatings on non-conductive materials such as plastic, wood, and wood-based composite panels. Within the scope of this research, low temperature curing (120–130°C) was applied to wood-based composite panels of medium-density fiberboard (MDF), particleboard, and plywood panels to facilitate conductivity. Epoxy, polyester, and hybrid (epoxy-polyester) types of powder coating and waterborne acrylic liquid coating were applied to the surface of the materials. The panels coated with the powder coatings were compared to the panels coated with the waterborne acrylic resin coating (control group). Combustion behaviors was determined according to ISO 13927 standard, formaldehyde emission according to TS EN 717-2, and color and gloss changes after accelerated weathering according to ASTM G151 and ASTM G154. The best results for combustion behavior were obtained with the plywood panels and MDF panels coated with waterborne acrylic coating, for formaldehyde emission with plywood panels coated with epoxy powder coating and waterborne acrylic coating and plywood panels, MDF panels, and particleboard coated with polyester powder coating. The least color change and gloss loss were detected in the plywood panels, particleboard, and MDF panels groups with polyester-based powder coating.

摘要

最近，研究和开发工作已经扩展到包括静电粉末涂料在塑料、木材和人造板复合板等非导电材料上的应用。在这项研究的范围内，低温固化（120-130°C）被应用于中密度纤维板（MDF）、刨花板和胶合板的木质复合板，以促进导电性。环氧树脂、聚酯和混合（环氧树脂-聚酯）类型的粉末涂料和水性丙烯酸液体涂料应用于材料表面。将涂有粉末涂料的面板与涂有水性丙烯酸树脂涂料的面板（对照组）进行比较。燃烧行为根据 ISO 13927 标准确定，甲醛释放量根据 TS EN 717-2，根据 ASTM G151 和 ASTM G154，加速风化后颜色和光泽会发生变化。涂有水性丙烯酸涂料的胶合板和中密度纤维板的燃烧性能最好，涂有环氧粉末涂料和水性丙烯酸涂料的胶合板和涂有聚酯粉末涂料的胶合板、中密度纤维板和刨花板的甲醛释放量最好. 在具有聚酯基粉末涂层的胶合板、刨花板和 MDF 面板组中检测到的颜色变化和光泽损失最少。涂有环氧粉末涂料和水性丙烯酸涂料的胶合板和涂有聚酯粉末涂料的胶合板、中密度纤维板和刨花板的甲醛释放量。在具有聚酯基粉末涂层的胶合板、刨花板和 MDF 面板组中检测到的颜色变化和光泽损失最少。涂有环氧粉末涂料和水性丙烯酸涂料的胶合板和涂有聚酯粉末涂料的胶合板、中密度纤维板和刨花板的甲醛释放量。在具有聚酯基粉末涂层的胶合板、刨花板和 MDF 面板组中检测到的颜色变化和光泽损失最少。