Hardness and micro-indentation hardness comparison of recycled modified HDPE

This research paper deals with the possible utilization of irradiated high-density polyethylene (HDPE) after its service life. Powder of recycled irradiated HDPE is used as filler into virgin low-density polyethylene (LDPE) in concentrations from 10 to 60 %. Two combinations of materials were tested - granules LDPE/powder HDPE and powder LDPE/powder HDPE. Influence of the filler of the resulting blends on hardness and micro-indentation hardness was investigated. Shore D hardness test and instrumented micro-indentation hardness test were performed and results compared. According to the measured data both tested material characteristics are significantly influenced by the amount of the filler. Hardness increased with increasing amount of the filler at both material combinations; however results of micro-indentation test shows little inconsistency in hardness of surface layer. © (2014) Trans Tech Publications, Switzerland