A feasibility study on boards from wood and plastic waste: bending properties, dimensional stability and recycling of the board

Abstract

plastic waste: recycling of the boardThe increasing obligation to manage and to recycle industrial and municipal solid waste leads to the developing of new recycled products. In this paper, the possibility to make boards from wood residues and plastic waste (weight-to-weight ratio: 3:1), has been studied. They are obtained by simpIy heating and compressing. The mechanical tests show that the resistance to static bending are close to those of commercial particleboards. The dimensional stability of recycled wood-plastic composites appears to be particularly encouraging compared to traditional boards. Furthermore, the thermoplastic nature of the waste materials used allows the recycling of the resultant waste, or of the products once at the end of their useful life: tests of runs of successive recycling without any additional supply show a slight decrease in the mechanical properties of the boards obtained, when compared to the original boards. Untersuchungen zur Herstellung von Platten aus Holz-und Kunststoffabfi~llen: Biegefestigkeit, Dimensionsstabilit~t und Wiederverwertung der PlattenDie steigende Verpflichtung, industrielle und kommunale Abffille wiederzuverwerten ffihrt zur Entwicklung neuer Produkte. In dieser Studie wird die M6glichkeit untersucht, Platten aus Holz-und Kunststoffresten im Verh~iltnis 3:1 herzustellen. Die Platten wurden einfach durch Erhitzen und Verpressen hergestellt. Ihre statische Biegefestigkeit lag nahe der yon kommerziellen Spanplatten. Die Dimensionsstabilit~it erscheint vielversprechend im Vergleich mit traditionellen Platten. Dariiberhinaus erlaubt das thermoplastische Verhalten der Abfiille sowohl eine Wiederverwendung der Reste bei der Herstellung als auch der produzierten Platten nach ihrem Gebrauch. Nach mehrmaliger Wiederwertung solcher Platten ohne sonstige Zus~itze ergab sich eine nur geringfiigige Abnahme der mechanischen Eigenschaften.

Effect of chemical modification of wood on the mechanical and adhesion properties of wood fiber/polypropylene fiber and polypropylene/veneer composites

“…Evidence of the mechanical interlocking of the components in particleboards bonded with recycled polyethylene has been obtained by means of SEM micrographs which showed wood cell lumina ®lled with the plastic. Furthermore, particleboards bonded with recycled polyole®ns have been proved to reach mechanical properties comparable to those of commercial particleboards (Boeglin et al 1997, Pecina et al 1998. Similarly, mechanical tests of composites composed of alternating layers of recycled paper and polyethylene sheets have shown that the bending properties of the composites do not differ much from those of commercial particleboards (Ellis et al 1993).…”

Wood production, wood technology, and biotechnological impacts

“…Research has also demonstrated that fibres released from particle board, OSB, and MDF can be recycled in MDF production (Dix et al 2001a,b, Schoo et al 2003see above). Furthermore, wood-fibre plastic compounds might be produced (WPC; Boeglin et al 1997, Balatinecz & Sain 1998, Balasuriya et al 2003, or wood cement composites and light-weight bricks (Stahl et al 2002. With WPC, repeated material recycling has recently been tested.…”

Características de compósitos laminados manufaturados com polietileno de alta densidade (PEAD) e diferentes proporções de casca de arroz e partículas de madeira.

“…Constatou-se também que, com o aumento da porcentagem de PEAD, diminuiu o inchamento do compósito em ambos os casos. Boeglin et al (1997) obtiveram valores de 1 a 10% de inchamento em compósitos com 75% de partículas de madeira. Isso pode ser explicado pela maior proporção de partículas de madeira no composto, o que resulta em uma maior quantidade de sítios disponíveis para a penetração da água no interior do compósito (Teixeira et al, 2002).…”

“…Teixeira et al (2002), trabalhando com proporções de 40, 50 e 60% de polietileno de baixa densidade (PEBD), encontraram valores entre 2,77 e 25,50%. Boeglin et al (1997) obtiveram resultados em torno de 50% após 24 horas em compósitos com menor porcentagem de plástico.…”