Martin Zachar

Evaluate the flammability of a PU foam with double-scale analysis

Two-scale tests, microscale and bench scale, are conducted to analyze the flammability of a flexible polyurethane foam. Microscale tests include simultaneous thermal analysis coupled to Fourier transform infrared spectroscopy, and microscale combustion calorimeter (MCC). Evolved gas components, heat release rate per unit mass, total heat release, derived heat release capacity, and minimum ignition temperature are obtained. Bench scale tests are performed on cone calorimeter. Peak heat release rate per unit area, effective heat of combustion, minimum incident heat flux for ignition, and total heat release per unit area of different incident heat fluxes are obtained. FO-category of the PU foam is estimated by multiple discriminant function analysis based on the results of cone calorimeter test. The relationship between the two-scale tests is analyzed. The minimum ignition temperatures derived from multi heating rate MCC tests are used to predict the time to ignition and compared with the results from cone calorimeter tests. This PU foam is evaluated as a high fire hazard polymer having low heat release capacity, low ignition temperature, and short ignition time.

Modified Method of Evaluation the Effect of the Protection Retardant Coatings Applied on the Surface of the Wood Building Construction

The paper deals with the protection of wood in wooden building constructions, in accordance to the current trends in the use of organic materials in the construction sector and also in the woodworking industry. The attention is paid to the assessment of the effectiveness of selected retardant protective substances applied to spruce wood that was thermally loaded for prediction of flammability properties and assessing the suitability of their application. In the experiment, there was used the modified testing method with evaluation of the characteristics of thermal degradation. At the same time, there were evaluated selected material characteristics, in relation to the adhesion of retarding coatings applied.

The New Progressive Polymeric Materials for the Reduction of VOC in the Woodworking Industry

The paper deals with the preparation of new type of progressive polymer blends created from bicomponent synthetic fibres (PP/PA6) with addition of interfacial agent maleine-anhydrid (MAH) and polymeric mixtures with varying content of the polyamide component for the purpose of subsequent production of a highly efficient filters for collection of hazardous chemical (VOC) in processes surface finishing and treatment of wood products. Morphological parameters were studied in relation to the supramolecular structure of the mechanical properties and the specific rheological characteristics in terms of their experimental process of spinning of bicomponent fibres.