2.1. PPW films
The actual light weight PPW films about 1 kg have been
collected in household plastic waste recycling plant in Japan and
analyzed. Samples were shredded before wet gravity separation,
the size distribution of shredded sample was about 3–50 mm,
but most of the sample was about 1 cm 1 cm size. These light
plastic films originated from the container and packaging, and
mainly consist of PE and PP films, however some other films (like
PVC, PVDC, PET, PS, etc.) contamination also occur.