Bajzova L. Substantiation of the structure and pressing mode of lightweight particleboard using polystyrene

The object of research is the technological process of lightweight particleboards manufacturing by using expanded polystyrene. The aim is to substantiate the structure and modes of pressing lightweight particleboards using expanded polystyrene. Research methods: mathematical statistics, nonlinear programming, mathematical planning of experiments and processing of experimental data, comparative analysis, gravitational, drying-weight, laminar flow of liquid, refractometric, potentiometric, flat hot pressing, direct and equilibrium transformation, randomization. Scientific novelty: for the first time the regularities of the expanded polystyrene influence on the process of heating the particle-polymer package during the pressing of lightweight particleboards using of expanded polystyrene were experimentally established. A method for calculating the parameters of thermal conductivity and specific heat of conductive heating of a particle-polymer package has been developed, on the basis of which a model has been developed to determine the duration of heating of such a package. A new structure of lightweight particleboard and a method of its production are proposed, the novelty of which is confirmed by the patent of Ukraine for a utility model. For the first time, the properties of the proposed lightweight particleboards using expanded polystyrene to the requirements of the standard for lightweight particleboards was experimentally proved. Practical significance: lightweight particleboard with a new structure and method of its production is proposed and protected by a security document, which expands the range of wood composite materials and will allow to increase the number of design solutions in furniture and interior design. A model of the process of heating a particle-polymer package in the process of pressing lightweight particleboards using expanded polystyrene has been developed. Using of this method allows to increase the manufacturing technology efficiency. The manufacturing calculation method of lightweight particleboards application, using expanded polystyrene on the basis of which expediency of their introduction in production and production efficiency is offered. The results of the work are used in the educational process and accepted for implementation in production at the chipboard factory, which is specified in the relevant acts. The area - woodworking.