Abstract This research focuses on recycling rubber tire waste through pyrolysis to produce recovered carbon black (rCB). The rCB is combined with recycled low-density polyethylene (rLDPE), calcium carbonate (CaCO 3 ), fatty acid, metallic stearate, and (PE) wax create an masterbatch for household packaging. Surface modification of CaCO particles using stearic acid improves the compatibility LDP...