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An example of Corporate Social Responsibility of university – activity of Faculty of Wood Technology WULS – SGGW. The goal of the paper was to analyse the level and range of Corporate Social Responsibility (CSR) of university. As an example the meeting with key employers was examined, to support the development of faculty’s didactics by adjusting the teaching program and the profile of graduate to...
The article attempts to analyze the process of plywood production of a Polish plywood manufacturer. The aim is to describe the possibility of change in the production process in order to optimize production and minimize waste. It also indicates the possibility of minimizing production costs. Costs reduction could be achieved by modernization of technology and production equipment, as well as through...
The aim of this research was to investigate formaldehyde content in and volatile organic compounds release from particleboards produced from fibrous chips. The object of the tests were panels produced from fibrous chips of black locust Robinia Pseudoacacia L. and willow Salix Viminalis L., as well as from typical industrial particles. The results show that formaldehyde content in the panels produced...
The aim of the research was to investigate the face screw withdrawal resistance of panels produced from fibrous chips of willow Salix Viminalis L. and black locust Robinia Pseudoacacia L. A series of laboratory 3-layer panels were produced from fibrous chips as well as from industrial particles. The results were compared to commercial industrial panel performance. The investigation shows that the...
Strongly hydrophobic ammonium ionic liquids penetrating the wood structure and protecting solid wood from water absorption were developed. By covering the surface of wood with ammonium ionic liquid the wood is hydrophobically and antiseptically protected for a long time. As it was mentioned above, swelling and water absorption of protected wood is several times less compared to unprotected wood. The...
The aim of this study was to determine the influence of relative humidity on the form and mass of composite panels produced from wood-based panels covered with aluminium plate on one side. Part of the samples was additionally covered with aluminium foil on the side opposite to aluminium plate. HDFs, MDFs and particleboards were used as base material. The results of experiments show that relative humidity...
The increasing demands concerning formaldehyde content in/emission from particleboards force search after alternative bonding agents. One of such bonding agents can be polivinyloacetate (PVAc) glue. Unfortunately its high viscosity makes it difficult to apply the glue using methods for urea-formaldehyde glues. The viscosity change as dry mass decreases can be the reason for low strength of particleboards...
The aim of the research was to investigate the possibilities of partial substitution of conventional wood with alternative raw materials without raising the costs. One of the advantage of this kind of materials is that chips with different geometry can be made from agricultural lignocellulosic materials in contrast to wood waste commonly used for wood based panels production. Results of investigation...
The aim of the investigations was to determine the influence of the feed speed during drilling on the multi-spindle drilling machine on the affluence height of the machined laminated particleboards. It was noticed that the affluence height got lower with the feed speed increase up to about 0.4 m/min, above this value the affluence height was stable till the speed reached about 2 m/min and above this...
Chips for particleboard production are mainly characterized by two parameters: dimensions (length, width and thickness) and shape. Shape of a chip is usually described by chosen dimensions ratios. The most commonly used parameters are the slimness ratio and flatness ratio. But the above-mentioned parameters are insufficient to characterize technological chips, especially in the light of their further...
The aim of this work was an investigation of the influence of a tool's material and tool's geometry (blade angle) on wear of the tool when milling medium density fiberboards. As material for the tool the high-speed steel and carbide were used. Four types of blades of angles of 25, 40, 45 and 55 degrees were produced from each of these materials. The investigation of MDF milling shows that commercial...
The aim of this work was to characterize the form of the tool wear during milling of two different materials: particleboards produced from wooden chips and particleboards produced from rape straw parts. Research shows that even when the average bluntness is similar the form of the bluntness is different. The wear of tools which machine particleboards from wooden chips was more irregular with clearly...
The aim of this work was to examine the influence of the height of the cut layer on the forces and work of cutting in milling of laminated particleboards. The feeding force at the crack initiation and the maximum feeding force were measured, as well as the maximum of normal force. Specific work of cutting, specific work of new surface creation and specific work of chip deformation were calculated...
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