Strength properties of moulding sands with chosen biopolymer binders

The article presents the results of primary researches of the IV generation moulding sands, in which as the binders are used different biodegradable materials. The bending and the tensile strength of the moulding sands with polylactide, poly (lactic-co-glycolic acid), polycaprolactone, polyhydroxybutyrate and cellulose acetate as binders were measured. The researches show that the best strength properties have the moulding sands with polylactide as binder. It was proved that the tested moulding sands’ strength properties are good enough for foundry practice.