Industrial scrap of WPC profiles was collected for this study. The profiles for floor and deck applications were extruded from PVC filled with 20 phr of wood flour. The collected scrap consisted mainly of waste from the start-up process and the profiles rejected during quality inspection. The scrap of PVC/wood flour profiles was ground to sizes close to that of the freshfeed pellets, ranging from about 3–5 mm. The experimental work on recycling wood plastic profiles of PVC/wood flour composites consisted of two parts as detailed below.
2.1.1. Part 1: To evaluate the appropriate ratio for recycling of WPC scrap:WPC freshfeed
Different weight ratio of the ground WPC scrap:WPC freshfeed pellets was dry blended and re-extruded as recycled WPC profiles at 0:100, 20:80, 30:70, 40:60, 60:40, 80:20 and 100:0. Re-processing of the WPC profiles was conducted by using an industrial scale twin screw extruder. The most appropriate mix ratio of WPC scrap:WPC freshfeed was determined based on the mechanical and physical properties of the recycled profiles.
Industrial scrap of WPC profiles was collected for this study. The profiles for floor and deck applications were extruded from PVC filled with 20 phr of wood flour. The collected scrap consisted mainly of waste from the start-up process and the profiles rejected during quality inspection. The scrap of PVC/wood flour profiles was ground to sizes close to that of the freshfeed pellets, ranging from about 3–5 mm. The experimental work on recycling wood plastic profiles of PVC/wood flour composites consisted of two parts as detailed below.2.1.1. Part 1: To evaluate the appropriate ratio for recycling of WPC scrap:WPC freshfeedDifferent weight ratio of the ground WPC scrap:WPC freshfeed pellets was dry blended and re-extruded as recycled WPC profiles at 0:100, 20:80, 30:70, 40:60, 60:40, 80:20 and 100:0. Re-processing of the WPC profiles was conducted by using an industrial scale twin screw extruder. The most appropriate mix ratio of WPC scrap:WPC freshfeed was determined based on the mechanical and physical properties of the recycled profiles.
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