Both Engage 8402 and HDPE pellets were hot-pressed into sheets with dimensions of 1.75 mm thick by 100 mm length and 100 mm width under a load of approximately 5000 kg for 15 min at 150 °C. The sheets were subsequently air-cooled to room temperature, as shown in Figure . Rectangular strips of 25.4 mm width (~ 1 inch) were cut from these sheets, as exhibited in Figure . Two rectangular strips were partially stacked to an overlap area of 25.4 mm × 12.7 mm (1 inch × 0.5 inch), with the non-overlapping regions separated using aluminum foil. The partially overlapped strips, covered by Teflon sheets, were then embedded into mold slots, as illustrated in Figure ). The HDPE specimens were heated in the oven at 140 ℃ for 40, 80, 120, and 160 seconds, while the Engage 8402 specimen were heated at 140 ℃ for 20, 40, and 60 seconds, before being cooled to room temperature. During heating, the flow of melt was constrained by the slot dimensions (100 mm length × 25.4 mm width × 5 mm depth). Moreover, a load of 1000 kg was applied to facilitate the HDPE diffusion.