The effects of short-term thermomechanical (STTM) densification temperature and pressure on the changes in surface roughness, wettability, mass loss (ML), thickness density alder, beech, birch, pine wood veneer with low moisture content (~5%) were investigated. anatomical structure veneers was also observed. Veneer sheets densified using levels 4, 8 12 MPa at three temperatures: 100°C, 150°C 200°C for 4 min. results compared those non-densified veneers. obtained show that STTM similarly to...

Thermo-mechanical densification of wood is performed to improve physical and mechanical properties wood. During this treatment aesthetic wood, including gloss, also change. Therefore, the purpose study was determine effect short-term thermo-mechanical (STTM) in different species (alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), pine (Pinus sylvestris L.)) on their gloss changes. Commercial veneers were densified a hot plate press for 4 min at...

The effect of short-term thermomechanical densification veneer on the surface roughness and anatomical changes in four wood species – alder (Alnus glutinosa Gaertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), pine (Pinus sylvestris L.) was studied. Veneer sheets were densified at a temperature 100, 150, or 200°C pressure 4, 8, 12 MPa for 4 minutes. Seven parameters such as Ra, Rz, Rq, Rp, Rv, Rsk, Rku determined. Profile recorded using modified Carl Zeiss ME-10 profile...

The objective of this study was to evaluate the glossiness black alder wood (Alnus glutinosa L.) samples coated with two varnish types as a function exposure dry heat and artificial aging. chemical resistance cold liquids also evaluated. Based on findings in work, it appears that their structural differences influenced overall samples. UV exhibited higher gloss values than those water-borne product within range silky matte grades. surface UV-coated more varnish. decreased time aging,...

The objective of this study was to evaluate the adhesion strength and glossiness black alder wood (Alnus glutinosa Gaertn. L.) coated with water-borne UV varnishes by two application systems. Prior coating, samples were prepared sanding four combinations grit size sandpapers, 180 being final grit. surface quality specimens measured a white light profilometer. Any increase in gradually reduced roughness, which further influenced overall coating performance samples. varnish applied roller...

The study investigated the effects of short-term thermo-mechanical (STTM) densification temperature and pressure on changes in surface wettability alder (Alnus glutinosa), beech (Fagus sylvatica), birch (Betula verrucosa) pine (Pinus sylvestris) wood veneer.Veneer sheets were densified using levels 4 MPa, 8 MPa 12 at three temperatures: 100°C, 150°C 200°C for a short time min.Wettability was determined by measuring contact angles with distilled water.The results compared those non-densified...

The objective of this study was to optimize the sanding and coating processes black alder wood promote support its use in furniture manufacturing. Two criteria have been applied for process optimization, namely, minimum surface roughness samples power consumption during as a function various systems. sanded specimens strongly depends on grit size used. eco-varnishes were by spraying. Moreover, effect preparation varnish type properties expressed layer adherence substrate glossiness...

The aim of this pioneering study was to compare and evaluate two different pre-treatment processes wooden surfaces prior varnishing by sanding or thermal compression in terms the impact on color characteristics varnished surface. In experiment, a wood veneer black alder birch before subjected with sandpaper 180 grit size, at temperatures 210 °C. Three kinds commercially manufactured transparent varnish (water-based (WB) varnish, polyurethane (PUR) UV-cured (UV) varnish) were applied prepared...

The choice of surface finishing technology for floorboards can significantly influence the risk slipping. This study aimed to assess impact on likelihood slippage, focusing lacquered made northern red oak (Quercus rubra L.). Four methods were applied floorboard surfaces, with primary distinction between tested variants being level glossiness in top layer, ranging from 3 20 gloss units (GU). To evaluate slip risk, tests conducted using British portable skid resistance tester (BSRT), providing...

One of the most important properties surface wood-based panels is their roughness. This property determines way working with material in processes gluing and varnishing. The aim this study was to determine effect various sanding belt configurations feeding speed conveyor during grinding on roughness high-density fiberboards (HDF). research prepared under industrial conditions. Three types boards were selected for tests. After grinding, parameters measured both transversely longitudinally...

The temperature resistance of glued timber, which is crucial for wood construction, represents a significant assessment criterion. To gain insights into this aspect, study utilized methods such as shear strength test in accordance with EN 302-1:2013-06 under thermal loading (from 20 °C to 200 °C), and Differential Scanning Calorimetry (DSC) determine the glass transition (Tg). An increase load resulted decrease an breakage. A hierarchy adhesive groups was established based on performance...

The study presents the hydrophobic effect of silane-modified protective systems on wood resistance to aging factors (water and UV radiation).This paper is focused conventional low VOC emulsion for exterior use, which were improved with silanes such as methyltrimethoxysilane (MTMOS), aminoethylaminopropyltrimethoxysilane (AEAPTMOS) glycidoxypropyltrimethoxysilane (GPTMOS).The performance new systems, applied pine by surface impregnation, was demonstrated through an accelerated weathering test...

This paper investigated the effects of heat treatment in open (atmospheric pressure) and a closed (under system on shear adhesion strength Scots pine (Pinus sylvestris) wood. In addition, pull-off adherence testing was carried out coatings with water-based, polyurethane-based oil/wax-based varnishes. Shear decreased significantly after (31 % to 39 %) system, while it between 2 38% without glue. The wood samples glued glue higher than at laboratory scale. lower modified could be attributed...

Wood remains one of the most attractive building materials [...]

Surface roughness is an important factor during the processes of wood gluing and finishing. This study proposed a new approach for preparation veneer surfaces before varnishing through use thermal compression instead sanding. The quality pre-treated surface was examined using measurements. In experiment, black alder birch, varnishing, subjected to sanding with sandpaper 180 grit size, at temperatures 210 °C. Three different types commercially manufactured varnishes (water-based (WB),...

This article concerns research into the influence of energy dose distributed by UV lamps on selected parameters varnish coatings formed during varnishing process lightweight cellular panels. The board used in study was made according to an innovative solution. surface finishing boards carried out using roller method combination with digital and analogue printing under industrial conditions. Contact angle measurements obtained were out, from which free calculated. In addition, interlayer...

In this study European ash wood (Fraxinus excelsior L.) was Poland; and at 212ºC in Termogenik®, Spain.After modification, samples were characterized by wet chemistry according to standard methods (TAPPI) instrumental (FT-IR); addition, surface physical properties measured (density, acidity, moisture, water uptake, contact angle, colour) order quantify changes due treatment temperature.The results showed that chemical composition of modified presents a gradual variation the heating regime,...

Rotary-cut veneer is characterised by two sides, namely loose and tight surface, which have different properties.The information concerning dynamic contact angle behaviour of sides plays an important role in effi cient use veneer.Therefore, the objective this study was to investigate infl uence compression temperatures pressures on various wetting birch veneer.Veneer sheets were compressed a hot press at 150 180 °C using seven pressure levels from 0.5 3.5 MPa.Wettability thermally evaluated...