Effects of Chip Type on the Properties of Chip-Sawdust Boards Glued with Polymeric Diphenyl Methane Diisocyanate.

Radosław Mirski,Marek Wieruszewski,Adam Derkowski,Dorota Dukarska,Dorota Dziurka

doi:10.3390/ma13061329

Radosław Mirski, Marek Wieruszewski + Show 3 more

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https://doi.org/10.3390/ma13061329

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Journal: Materials	Publication Date: Mar 14, 2020
Citations: 11	License type: CC BY 4.0

Affiliation: University of Life Sciences in Poznań

Abstract

This study investigates the effects of chip type and sawdust percentage on physical and mechanical properties of chip–sawdust boards. The used wood chips varied in linear dimensions and original source. The origin determined the wood quality, which translated into the chips’ linear dimensions. The used materials were chips from sawmill waste processing, aggregate processing of sawmill wood, and chips intended for medium-density boards. The experiment demonstrated that the best boards in terms of mechanical properties were obtained from 4-mm-thick chips with 30% sawdust content and a density of 850 kg/m3. These boards meet the requirements of the EN 312 (2010) standard for P5 boards.

Highlights

Wood-based materials are mostly made from wood-derived products, such as particles or strands joined with glue
This study investigated the option of using wood materials generated in various sawmill facilities without further processing for chip–sawdust board production
The modulus of rupture (MOR) showed a considerably greater variability, which was probably due to the uneven distribution of sawdust among the chips

Summary

Introduction

Wood-based materials are mostly made from wood-derived products, such as particles or strands joined with glue. Their properties depend on the quality of the used particles or strands and, on their linear dimensions. The particles’ geometry determines the mechanical properties of wood-based materials, while the adhesive determines their resistance or durability under specific process conditions. Wood-based materials are classified depending on the particle size and orientation. The linear dimensions of wood particles considerably affect the mechanical and physical properties of the boards made from them [4,5,6] The main goal of machining is obtaining appropriate material for further production, i.e., retaining as many wood characteristics as possible, which is usually related to particle geometry [1,2,3].

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