• PRODUCTION OF LAYERED MDF PANEL HAVING FINE FIBERS IN FACE LAYERS AND COARSE FIBERS IN CORE LAYER FOR FURNITURE INDUSTRY

    Machines. Technologies. Materials., Vol. 10 (2016), Issue 5, pg(s) 46-47

    MDF (Medium Density Fiberboard) which is one of the wood-based panels used for industrial applications such as furniture, building materials, and laminate flooring the conventional MDF panels are produced using single layer in the mat forming machine. In this study, it is aimed to produce layered MDF panel for the furniture industry. The surface layers of the MDF consist of fine while the core layers consist of coarse fibers. The MDF panels having different face and core layer ratios could be produced using different defibrator disc gap, which results in different fiber sizes. In the production of layered MDF production, the MDF companies should change their mat forming system, which look like the mat forming of three layers particleboard. The MDF companies having the layered mat forming machine can also use the conventional production which is one layer mat forming production in the MDF. The advantages of three layer MDF are as follows; (1) The amounts of wood and adhesive can be decreased by using the cores fibers used in the core layer of the MDF, (2) The fiber production capacity of the defibrator can be increased using cores fibers, which positively affect the energy saving in the defibrator, (3) The splitting caused by side screw withdrawal resistance can be prevented using core layer consist of coarse fibers.

  • MECHANICAL PROPERTIES OF WOOD POLYPROPYLENE COMPOSITES PRODUCED BY USING RESIN IMPREGNATED PAPER WASTE

    Machines. Technologies. Materials., Vol. 10 (2016), Issue 5, pg(s) 38-40

    In this study, it was evaluated some mechanical properties of polypropylene composites reinforced with resin impregnated paper waste (MIPW) obtained from the particleboard and fiberboard factories. To meet this objective, resin impregnated paper waste and pine wood flour were compounded with polypropylene with coupling agent (MAPP) in a twin screw co-rotating extruder and then was manufactured by injection molding process. Injection molded composites were prepared from the wood flour, MIPW powder and polypropylene with maleic anhydride-grafted polypropylene (MAPP) at 10, 20, 30, 40, and 50 wt% contents of the MIPW powder. The tensile and flexural properties of wood polypropylene composites filled with resin impregnated paper waste were decreased. But still, the test results showed that the MIPW can be efficiently used as reinforcing filler for polypropylene composite due to satisfactory mechanical properties of the composites.

  • SURFACE QUALITY OF WOOD PLASTIC COMPOSITES COATED WITH SOLVENT AND WATER BASED PAINTS

    Machines. Technologies. Materials., Vol. 10 (2016), Issue 4, pg(s) 33-35

    This study investigated surface hardness, roughness, and abrasion resistance of hot press molded wood plastic composite (WPCs) panels coated two types paints, water- or solvent-based paints. The WPC panels are produced from different amounts of pine wood flour (30 to 60 wt%), virgin polypropylene (37 to 67 wt%) and 3 wt% maleic anhydride polypropylene (MAPP). The surface abrasion resistance and hardness of the WPC panels painted with water or solvent based paints increased up to 50 wt% wood flour content, but further increment in the wood flour content decreased the abrasion resistance and hardness. The surface roughness of the painted WPCs increased with increasing wood flour content. The WPCs painted with solvent-based paints showed better surface quality as compared to the WPCs painted with water- based paints.