Kusiyana pakati pa matumba a PE ndi PP

Zida zosiyanasiyana, PE: polyethylene, PP: polypropylene

PP ndi pulasitiki yotambasuka ya polypropylene, yomwe ndi mtundu wa thermoplastic.Matumba a PP kwenikweni ndi matumba apulasitiki.Makhalidwe a matumba a PP ndi opanda poizoni komanso opanda kukoma.Pamwamba pa thumba PP ndi yosalala ndi mandala, ndipo chimagwiritsidwa ntchito mu ma CD zodzoladzola, chakudya, zidole, zovala, stationery, zamagetsi, hardware mankhwala ndi mafakitale ena.Mtundu wa thumba la PP ndi wowonekera, wabwinobwino, wolimba bwino, wamphamvu, ndipo sungathe kukanda.Mitengo yopangira matumba a PP ndi yotsika mtengo kwambiri, ndipo makhalidwe ake ndi awa: osavuta kuwotcha, lawi lamoto limasungunuka ndi kudontha, pamwamba ndi chikasu ndipo m'munsi ndi buluu, mutasiya moto, pali utsi wochepa ndipo kuyaka kumapitirira.

PE ndi chidule cha polyethylene, womwe ndi mtundu wa utomoni wa thermoplastic wopangidwa ndi polymerization wa ethylene.Polyethylene ndi yopanda fungo, yopanda poizoni, imakhala ngati sera, imakhala ndi kutentha kochepa kwambiri (kutentha kotsika kwambiri kumatha kufika -70～-100℃), imakhala ndi kukhazikika kwa mankhwala, ndipo imatha kupirira ma acid ambiri ndi alkalis (osagonjetsedwa ndi oxidizing katundu) Acid), osasungunuka mu zosungunulira zonse kutentha kwa chipinda, kuyamwa kwamadzi otsika, zinthu zabwino kwambiri zamagetsi zamagetsi;koma polyethylene imakhudzidwa kwambiri ndi kupsinjika kwa chilengedwe (mankhwala ndi mawotchi), ndipo imakhala ndi kukana kutentha kwaukalamba.Makhalidwe a polyethylene amasiyana mitundu ndi mitundu, makamaka kutengera kapangidwe ka maselo ndi kachulukidwe.Njira zosiyanasiyana zopangira zitha kugwiritsidwa ntchito kupeza zinthu zokhala ndi makulidwe osiyanasiyana (0.91 ~ 0.96g/cm3).Kuphatikiza apo, kukulunga kwa pulasitiki kwa zinthu za PE kumatha kutchedwanso thumba la PE.Zindikirani kuti zokutira zapulasitiki zomwe zimalumikizana mwachindunji ndi chakudya ziyenera kupangidwa ndi zinthu za PE, zomwe ndizotetezeka mthupi la munthu.