Abstract
The paper presents the impact of biodegradable material - polycaprolactone (PCL) on selected properties of moulding sands. A self-hardening
moulding sands with phenol-furfuryl resin, which is widely used in foundry practice, and an environmentally friendly self-hardening
moulding sand with hydrated sodium silicate where chosen for testing. The purpose of the new additive in the case of synthetic resin moulding
sands is to reduce their harmfulness to the environment and to increase their “elasticity” at ambient temperature. In the case of moulding
sands with environmentally friendly hydrated sodium silicate binder, the task of the new additive is to increase the elasticity of the tested
samples while preserving their ecological character. Studies have shown that the use of 5% PCL in moulding sand increases their flexibility
at ambient temperature, both with organic and inorganic binders. The influence of the new additive on the deformation of the moulding
sands at elevated temperatures has also been demonstrated.
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