Thermal deformation of moulding sands with biopolymer binders

Investigations concerning an application of biopolymer materials as binders for moulding sands are presented in the paper. These investigations constitute the continuation of examinations related to applications of various biopolymers as binding agents. The results of strength tests, obtained for the investigated sands (with the PLA2 biopolymer binder) prepared in a self-hardening sands technology and air as well as microwave hardened, are presented. Examinations of sand thermal deformations based on the hot distortion measurements and on the basis of thermogravimetric investigations of sands with selected biopolymer binders were performed.