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Possibility of manufacturing of wooden briquettes with the addition of leaves. In this study, the influence of the addition of oak leaves on the properties of briquettes made from pine wood in the form of cubs with dimensions 155 mm x 102 mm x 65 mm was described. Five variants of briquettes were prepared. These variants were different in terms of wood/leaves ratio: 100% / 0%, 25% / 75%, 50% / 50%,...
An attempt to use postconsumer MDF as a raw material for the manufacture of particleboards. The aim of the study was to determine the influence of addition of mechanically grinded postconsumer MDF to the inner layer of particleboards on its properties. Three-layer particleboards with a predetermined density of 650 kg/m3 and a thickness of 16 mm and a weight fraction of MDF particles of 10, 20, 30...
The paper presents original data concerning one aspect of the machinability of special, wood particle boards bonded with waste thermoplastics. The study focused on the measurement of drilling torque and thrust force. The classic ideaof machinability indexes was used. The experimental plastic particle boards (with a nominal density of 650 kg/m3) were made of industrial grade core-layer pine wood particles...
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 paper presents original data concerning one aspect of the machinability of special, wood particle boards bonded with waste thermoplastics. The study focused on the measurement of drilling torque and thrust force. The classic idea of machinability indexes was used. The experimental plastic particle boards (with a nominal density of 650 kg/m3) were made of industrial grade core-layer pine wood particles...
Insulation boards from thermoplastic bonded bark. Within this work, boards from thermoplastic bonded bark were made. Grinded bark of coniferous species and recycled polyethylene were used. Four variants of boards were manufactured: three of varying polyethylene weight ratio: 30, 40 and 50%, and fourth UF resin bonded. Assumed density of boards was 300 kg/m3, and thickness of 18 mm. Manufactured boards...
Strength properties of structurally reinforced plywood. The study determined the degree of improvement of mechanical properties of 19 layer beech plywood with a thickness of 10 mm by introducing two layers of structural reinforcement in the form of aramid, glass and carbon fabric. For manufactured plywood, density, static bending strength and modulus of elasticity in static bending, toughness strength...
Screw holding ability of the lignin-bonded biocomposites. Biocomposites derived from the unmodified and enzymatically modified lignin, hemp shives and shellac were manufactured in injection moulding process. The boards were characterized by hardness and screw holding ability. It was found that screw holding ability of the tested boards was comparable to those for particleboard and MDF. Moreover, addition...
Possibilities of single-stage pressing of veneered particleboards. Following work describes possibility of single-stage pressing of veneered particleboards. Three variants of the 16mm thick boards of 620kg/m3 density were manufactured for the test: (1) single-layer particleboard, (2) single-layer double-stage pressed veneered particleboard (3) single layer single-stage pressed veneered particleboard...
Flammability of plywood made from veneers protected with flame retardant based on diammonium hydrogen phosphate, citric acid and sodium benzoate. In this study the impact of pine and beech veneer protection with flame retardant based on diammonium hydrogen phosphate, citric acid and sodium benzoate on the flammability of plywood made from them has been determined. Retention of the agent in veneers...
Bonding quality of veneers protected with fireproofing preservation based on diammonium hydrogen phosphate, citric acid and sodium benzoate. In the study, joints strength in three-layer plywood glued with ureaformaldehyde resin, made from pine and beech veneers impregnated with fireproofing preservation based on diammonium hydrogen phosphate ammonium phosphate, citric acid and sodium benzoate, was...
Characteristics of selected fireproof properties of particleboard made from particles impregnated with salt agent. This paper presents results of selected fireproof properties of three-layer particleboard made from pine particles impregnated with open for general use bio- and salt fireproof agent for wood protection, based on quaternary ammonium compounds and boric acid. It leads to conclusion that...
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