TECHNOLOGICAL ASPECTS OF PRODUCTION OF POLYURETHANE FOAM BY THE FILLING METHOD

Abstract

The paper presents a study of the peculiarities of the technology for producing polyurethane foams (PUF) by pouring into molds. The method of obtaining polyurethane foam compositions based on a two-component system (polyol and polyisocyanate) with different weight ratios of the components is described. The characteristics of the initial components are presented and a basic technological scheme for the production of polyurethane foam is given. The technological parameters of the polyurethane foaming process are determined. The appearance of rigid and soft (elastic) polyurethane foam compositions and their differences are presented. The morphological features and the regularity of changes in porosity and properties due to the variation of the weight ratio of the initial components are described. A conclusion is made about the optimal combination of the weight fractions of the system components to obtain PU foam compositions of satisfactory shape, morphology, and uniform porosity of the material