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Publikācija: Feasibility of Reinforcing Birch Plywood with Hemp Fibres

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Nosaukums oriģinālvalodā Feasibility of Reinforcing Birch Plywood with Hemp Fibres
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.5. Materiālzinātne
Autori Gints Upītis
Jānis Dolacis
Atslēgas vārdi Reinforced plywood, hemp, phenol-formaldehyde resin, polyvinyl acetate glue
Anotācija The present paper reflects searches for solving the problems of enhancing the strength of plywood, reinforced with hemp fibres. A radical possibility of obtaining a new environmentally friendly material with enhanced strength characteristics is shown. The modern developing society has faced the problem of ever increasing demands for the energy intensity of production and the limited potentialities of meeting them. Recently, the worldwide demand for the sources of natural renewable resources has grown, governed by the energy saving and environmentally friendly technologies of their production, and the feasibility of their processing to environmentally friendly, biodegradable materials with a high added value due to the decrease of material and energy costs. One of such resources is hemp, which is rather profitable, requires much less amounts of artificial fertilisers than other cultures, has a favourable effect on the agroecosystem, improves the soil structure, and inhibits weeds, pests and diseases. Hemp fibre is one of the strongest natural fibres and its characteristics (high tensile strength, wet state strength, etc.) make it technically feasible for the production of different industrial products. It is shown that the reinforcement of birch five-layer plywood by hemp textiles with a cell size of 8 mm makes it possible to produce an environmentally friendly composite material. Optimal ratios of the components and the binder for producing a composite material of birch plywood, reinforced by hemp textiles, with enhanced mechanical characteristics in bending σbend up to 13.2 % and modulus of elasticity up to 10.3 % have been found. The given composite material can be used for the production of curved-glued furniture and other goods from plywood.
Hipersaite: http://www.iaws-web.org/files/file/Zborn%C3%ADk%202012.pdf 
Atsauce Upītis, G., Dolacis, J. Feasibility of Reinforcing Birch Plywood with Hemp Fibres. No: Proceedings of the 5th International Symposium “Interaction of Wood with Various Forms of Energy”, Slovākija, Zvolen, 26.-28. septembris, 2012. Zvolen: 2012, 89.-91.lpp. ISBN 978-80-968868-6-9.
ID 14299