Roughness and color evaluation of wood polymer composites filled by household waste of mate-tea
de Cademartori, Pedro H. G(Federal University of Paraná Wood and Forestry Science Center) | Missio, André L(Federal University of Santa Maria Forest Products Laboratory Center for Rural Sciences) | Mattos, Bruno D(Federal University of Paraná College of Materials Science & Engineering Polytechnic Center) | Gatto, Darci A(Federal University of Santa Maria Forest Products Laboratory Center for Rural Sciences,Federal University of Pelotas Faculty of Materials Engineering) | Magalhães, Washington L. E(Federal University of Paraná College of Materials Science & Engineering Polytechnic Center,Embrapa Forestry) | Lima, Edson A(Embrapa Forestry)
This study presents the preparation of polypropylene composites filled with mixtures of household waste of mate-tea and wood particles to increase the economic value chain of mate-tea, especially in Latin America. Filler mixtures in proportions ranging from 0 to 60% depending on the type of particle were used. The polypropylene matrix was fixed at 40% and roughness surface and color evaluation were performed. The highest mean roughness (Ra) was observed for the composite with 30:30% proportion of filler mixture, which denotes the difficulty of homogenizing a mixture of fillers with different shapes and dimensions. Nevertheless, even with higher roughness for composites with a balanced blend of filler, this does not imply the presence of large peaks and valleys. In general, all the composites presented a dark color. Variation of color composites was more evident for higher proportions of household waste of mate-tea.
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