In this study, carbon fibers were added as a reinforcement layer between wood veneers bonded with melamine-urea–formaldehyde (MUF) resin to improve properties of standard laminated composite. Two different fiber orientations tested, being parallel and perpendicular the veneers. addition, two locations evaluated. Internal, surrounding core veneer, external, below surface veneer. Flexural properties, water absorption, density, cutting force, tensile shear strength tested Results showed that...

Increasing demand for production of particleboard and environmental concerns drive to seek new sources lignocellulosic materials other than wood. Sugar beet pulp (SBP) is one the most common agro-residues, which remains after sugar production. Conducted investigation was determine suitability SBP as a raw material manufacturing. Three-layer particleboards with core layer made mixture industrial wood particles were prepared. Tested varied in proportions used layer. Investigation included...

The depletion of natural resources and increased demand for wood wood-based materials have directed researchers the industry towards alternative raw composite manufacturing, such as agricultural waste residues substitutes traditional wood. potential reusing walnut (Juglans regia L.) an material in particleboard manufacturing is investigated this work. Three-layer was manufactured laboratory with a thickness 16 mm, target density 650 kg∙m−3 three different levels (0%, 25% 50%) particles,...

Abstract In this study, wood plastic composites (WPC) made of poly(lactic acid) PLA and a bark-filler were manufactured. Two degrees bark comminution (10–35 mesh over 35 mesh) varied content (40, 50 60%) investigated. The studied panels compared with analogically manufactured HDPE boards. manufacture involved two stages: at first, WPC granules the appropriate formulation produced using extruder (temperatures in individual sections 170–180 °C) crushing hammer mill after cooling extruded...

Increased demand for wood affects its price and thus contributes to the growing interest in raw materials that can be used as a partial or total substitute production of particleboard. One particleboard Cannabis sativa or, more precisely, hemp shives. In this work, 7 variants panels with density 650 kg/m3 10 25% shives substitution different layers were produced. Particleboards containing characterized by lower compared conventional particleboards. The shares at levels 10% have slight impact...

The study aimed to determine the suitability of agricultural lignocellulosic biomass in form vine pruning waste for particleboard production. Two variants particleboards with densities 650 kg/m3 and 550 containing a varied amount (0, 25, 50 100%) were evaluated. strength (MOR, MOE IB), thickness swelling water absorption after immersion 2 24 h tested. results revealed that affected board thickening reduced properties. Boards 50% share met minimum requirements properties specified EN 312...

This study investigated the possibility of applying flat-pressed wood-polymer composites in conditions high humidity. The experiment involved three variants composite panels 16 mm thick, and 680 kg per m3 density. wood particles were bonded with polyethylene. share polyethylene core layer was fixed at 50%, while face layers content varied (40%, or 60%). following parameters examined: modulus rupture (MOR), elasticity (MOE), internal bond (IB), screw holding (SH), thickness swelling (TS),...

The objective of this work was to evaluate selected physical and mechanical properties experimental particleboards manufactured from pine spruce with charcoal particles in their core layer. For all the boards average density 750 kg m-3, while mass share layer changed (0%, 10% 50%). panels were tested respect properties, including formaldehyde emission. results indicated that significantly influenced swelling, water relations boards. In addition, a test on emission carried out, which revealed...

Wood–plastic composites (WPCs) increase the range of applications materials by creating new material solutions. As part this research, PLA (polylactic acid)- and HDPE (high-density polyethylene)-based were manufactured. Softwood sawdust or conifer bark with different sizes (large small) used as filler. In selected cases, addition 3% additives, such calcium oxide in case polyethylene-graft-maleic anhydride HDPE, tested. The manufactured examined for their density profile susceptibility to...

Influence of apple wood waste from the annual care cut on mechanical properties particleboards. As part work, influence share 3-layer particle boards was examined. Particleboards were prepared using two variants specific maximum pressing pressure 1.5 MPa and 2.5 mass particles at level 0%, 25%, 50% 75%. The results tests show a decrease in value modulus rapture elasticity with increase additive particleboard. In spite elasticity, all produced particleboards application MPa, met requirements...

1,3-dimethyl-4,5-dihydroxyethyleneurea (DDHEU) and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) were used as the binders in 3-mm high density fiberboard (HDF) manufacturing. The studies focus on physical mechanical properties of boards bonded with DDHEU or DMDHEU a potential substitute for typically urea-formaldehyde (UF) resins. adhesive loads 8% 12%. UF-bonded same resin load controls. Applied pressing time ranged between 4 5 minutes. results indicate that use enhanced boards. It was...

Due to the content of lignocellulosic particles, wood plastic composites (WPC) can be attacked by both domestic and mold fungi. Household fungi reduce mechanical properties composites, while aesthetics products changing their color surface decomposition substance. As part this study, impact fillers in form sawdust bark poly (lactic acid) (PLA)-based biocomposites on susceptibility growth was determined. The evaluation samples fouled with performed computer analysis image. For comparison,...

Influence of the filler on density profile wood polymer composites. WPC panels with HDPE matrix composites made in two stages were tested: 1 - obtaining granulate using extrusion method, 2 production by flat pressing form. As a filler, sawdust was used degrees fineness (about 10 35 mesh and below mesh) three levels content (40, 50 60%). In total, 6 panel variants created for which cross-section determined. It found that 40% are characterized uniform profile. The increase (up to 60%) affects...

The aim of this study was to investigate the effect storing methods woodchips from two species, pine (Pinus sylvestris L.) and alder (Alnus Mill.), on basic chemical composition sugar yield in liquid biofuel production. Two woody biomass were used study—an open pile a cover pile. wood felled at end November stored as industrial chips for eight months December onward. After time, material collected analyses enzymatic hydrolysis. results analysis both studied species showed influence type...

The possibility of using composite elements flooring pine veneers with knotholes for the production supporting layers has been determined. This assessment was made on basis Brinell hardness measurement face layer five-layer composites empty spots in their structure imitating various diameters (10, 20 and 50 mm). dependencies obtained from empirical determinations were supported by numerical analysis. It found that it is possible to use defects (empty spots) a diameter up mm produce three...

Two types of commercial 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) resins were used for the first time as binders in 3-ply plywood manufacturing. The studies aimed at assessment applicability DMDHEU substitute widely urea–formaldehyde (UF) resins. Applied press platen temperature was 120°C, 140°C, and 160°C pressing 300 s. results indicate that can be a binder plywood. mechanical properties: tensile shear strength, modulus rupture (MOR), elasticity (MOE) determined – i.e., > 1.0,...

An attempt to use „Tetra Pak” waste material in particleboard technology. The study investigates the effect of addition Tetra Pak core layer on physical and mechanical properties chipboard. Three-layer chipboards with a thickness 16 mm density 650 kg / m3 were manufactured. share boards was varied: 0%, 5%, 10% 25%. profile measured determine impact distribution. In addition, manufactured tested for strength (MOR, MOE, IB), swelling water absorption after immersion 2 24 hours. tests revealed...

The influence of temperature on selected strength properties furniture particleboard. As a part the study, particleboard was tested. P2 type industrial particleboards in three finishing options: raw boards (1), covered with melamine film white (2) and black (3) (10 samples per variant) have been subjected to temperatures from -20oC +120oC, at 10oC intervals. Time exposure for individual 7 days. MOR, MOE IB were determined tested boards. It has shown that above 50oC negative effect A large...

This study explores the possibilities of utilisation coniferous bark as a filler in wood–polymer composites (WPCs), its impact on properties such modulus rupture (MOR), elasticity (MOE), thickness swelling (TS) and water absorption (WA) after 2 h 24 immersion significance this compared to other factors. Six variants bark–polylactic acid (PLA) WPCs were manufactured, differentiated by their content particle size. As comparison, analogous filled with sawdust also manufactured. Bark-filled...

Porous wood-based boards, like any lignocellulosic material, are susceptible to biocorrosion caused by mold fungi. Their durability can be extended using biocides. Due the fact that porous boards considered an ecological it would beneficial also use natural agents protect them. For this purpose, surface of softboards was protected with a 30% solution cinnamon bark oil in ethanol. Three application levels were used: 75 g/m2, 120 and 200 g/m2 solution. It has been shown used at rate is...

The aim of this study was to investigate the applicability sugar beet pulp (SBP) in particleboard production as a substitute for wood material. Two variants board density, 650 kg/m3 and 550 kg/m3, containing 0%, 25% 50% SPB, were evaluated. During following features measured: modulus rupture (MOR), elasticity (MOE), thickness swelling (TS) water absorption (WA). results showed that boards up SBP meet standards general-purpose used dry conditions. Further increases content deteriorated some...

Wood plastic composites as a substitution for HDF. As part of the research, industrial HDF boards were used and WPC produced, differentiated in terms matrix (PLA HDPE) filler content (40%, 50% 60%). The density profile was measured to compare structure. In addition, manufactured tested strength (MOR, MOE), screw holding, thickness swelling water absorption after immersion 2 24 hours. characterized by higher than uniform profile. lower MOR MOE values boards. Compared boards, holding better...

Screw holding performance in WPC composites. In this research effort, the impact of fillers’ composition on wood-plastic composites (WPC) made poly (lactic acid) PLA was tested. The varied filler type (bark, sawdust) and its content boards (40, 50, 60%). were manufactured a two-stage process consisting extrusion flat pressing. Analogically prepared HDPE reference. Composites tested for density, density profile, screw-holding ability. Boards based performed better ability than HDPE. greatest...