The resin used in this study was linear low-density polyethylene (LLDPE). The melt flow index of the
polymer was measured at 5.0. The measurement was conducted on a Kayness melt flow indexer, according to the ISO 1133 standard. The resin was available in spherical particles with a diameter of around 3 mm, and was ground into powder by a local grinding agent. Table 1 lists the particle size distribution of the polymeric powder.