Ubwino wazinthu:
Polyethylene seraali ndi ntchito yabwino yodzola koyambirira, yapakati komanso mochedwa, poyerekeza ndi sera yotsika ya polima, ili ndi zinthu zabwino za rheological komanso zabwino zotsika mtengo;pa waximagwira ntchito yobalalika, kukana zokanda komanso kukana kukanda mu zokutira zaufa.