International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The objective of the present study was to investigate the effect of adhesive type on physical and mechanical properties of particleboard. Three types of adhesives, urea-formaldehyde, melamine-urea formaldehyde adhesive, and acrylic adhesive, were used in the production of lab scale particleboards with three layers. The particleboards produced with the acrylic adhesive had the best physical and mechanical properties, followed by MUF adhesive, and UF adhesive, respectively. The lowest formaldehyde emission was observed for the acrylic bonded particleboards, followed by MUF, and UF adhesive bonded particleboards, respectively. Based on the findings obtained from the present study, the acrylic adhesive can be efficiently used in the production of particleboard.

The objective of the present study was to investigate the effect of adhesive type on physical and mechanical properties of particleboard. Three types of adhesives, urea-formaldehyde, melamine-urea formaldehyde adhesive, and acrylic adhesive, were used in the production of lab scale particleboards with three layers. The particleboards produced with the acrylic adhesive had the best physical and mechanical properties, followed by MUF adhesive, and UF adhesive, respectively. The lowest formaldehyde emission was observed for the acrylic bonded particleboards, followed by MUF, and UF adhesive bonded particleboards, respectively. Based on the findings obtained from the present study, the acrylic adhesive can be efficiently used in the production of particleboard.

The waste powder produced during the manufacture of marble, which is presently mostly discarded in landfills, has the potential for higher-valued usage. Recycling marble waste powder will contribute to the protection of nature as well as economic gain. The goal of this study is to investigate the potential use of marble waste powder as filler in the thermoplastic composites with wood. Thermoplastic composites were manufactured by adding marble factory waste powder and wood powder in different ratios to polypropylene (PP). Maleic anhydride grafted polypropylene (MAPP) were used as coupling agent to improve interfacial adhesion between hydrophilic wood–fibers and hydrophobic polypropylene. The waste marble powder and wood powder were mixed by weight of with polypropylene in the percentage of 0%, 10%, 20%, 30%, 40%, and 50%. Physical and mechanical tests were performed on the specimens prepared from the thermoplastic composites. Although mechanical properties of the composites decreased with increasing content of the marble powder, the water absorption of the composites significantly decreased with increasing content of the marble powder.

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.

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.

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.