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Properties of Veneered Flat Pressed Wood Plastic Composites by One-Step Process Pressing

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Abstract

The aim of this study was to develop, manufacture and determine properties of veneer overlaid flat pressed wood plastic composite (WPC) panels from recycled low density polyethylene (rLDPE), wood particles and different kinds of veneer (rotary-cut birch veneer and sliced oak veneer) using various adhesives by one-step hot pressing. Food packaging polyethylene film (PE film) as recycled stretch wraps, recycled low density polyethylene (rLDPE) particles and phenol formaldehyde (PF) resin were applied as adhesive for the bonding of veneer to the surface of WPC. No modification additives were used for the manufacture of WPC. It was found that compared with non-veneered WPC, the panels sandwiched with natural veneers greatly improved their properties. The bending strength was improved in 1.9–2.6 and 7.9–10 times across and along veneer fibers respectively for both types of investigated veneer. The highest values of bending strength were observed in WPC panels veneered with rotary-cut birch veneer. However, the water resistance of veneered WPC panels was reduced in comparison with non-veneered. The WPC specimens veneered with both types of veneer using PE film had better mechanical properties and water resistance than those of the specimens made with other two types of adhesives. The veneering of WPC panels enables to significantly improve adhesion properties of these veneered surfaces for their further finishing. In addition, the veneering of WPC panels hides the surface defects and provides a uniform application of different paints, varnishes and films to the surface of such materials. Overlaying WPC panels with wood veneers improves their appearance and properties resulting in eco-friendly value-added products.

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Acknowledgements

The authors are grateful to the Slovak Academic Information Agency (SAIA) for financial support of this study.

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Authors and Affiliations

  1. Department of Wood-Based Composites, Cellulose and Paper, Ukrainian National Forestry University, Gen. Chuprynky 103, Lviv, 79057, Ukraine

    Pavlo Bekhta, Pavlo Lyutyy & Galyna Ortynska

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  1. Pavlo Bekhta
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  2. Pavlo Lyutyy
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  3. Galyna Ortynska
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Correspondence to Pavlo Bekhta.

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Bekhta, P., Lyutyy, P. & Ortynska, G. Properties of Veneered Flat Pressed Wood Plastic Composites by One-Step Process Pressing. J Polym Environ 25, 1288–1295 (2017). https://doi.org/10.1007/s10924-016-0904-2

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  • DOI: https://doi.org/10.1007/s10924-016-0904-2

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