Influência da geometria das partículas da camada interna nas propriedades de painéis particulados de três camadas

• Autor(a) principal: Araújo, Cristiane Karyn de Carvalho [UNESP]
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/157026; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-08-30/000906561.pdf
• topic: Chapa de madeira aglomerada; Compensados de madeira; Particulas; Plywood

Recent studies indicate that the demand for composite wood products such as plywood, oriented sheet chips, hardboard, particleboard, medium density fiberboard, and composite plates blades substantially increased worldwide. The objective of this work was to produce MDP (Medium Density Panel) with three particles of grain size percentages in the inner layer and thus verify the influence of the compositions in the physical and mechanical properties. The panels were produced consisting of three layers, with the outer bottom and top layers with composition of 20% particles from 35 to 60 mesh, amounting to 40% of the panel composition and varying the particle size percentage of the constituent particles of the inner layer, the remaining 60% of the particles, which are 9 to 16 mesh. The production of panels took place in the Materials Properties Laboratory of Unesp, Campus Experimental de Itapeva. The physical-mechanical characterization was based on normative document of the Brazilian Association of Technical Standards ABNT NBR 14810-2 / 2013. The data on the physical and mechanical tests were arranged in tables and statistical analysis was performed, compared with the standard and technical literature data. Of the three treatments obtained, Treatment 1 (30% 9 mesh and 70% 16 mesh) in the inner layer exhibiting superior results in all tests, possibly due to less amount of voids in its inner layer and greater surface area of contact between particles. Treatments 2 and 3 in most tests did not meet the normative specifications. It can be seen that the slenderness ratio did not influence the results obtained in the physico-mechanical tests