Posachedwapa, kasitomala anafunsa mtengo wa polypropylene chingwe, kasitomala ndi Mlengi wa nsomba ukonde kunja, kawirikawiri ntchito polyethylene chingwe, koma polyethylene chingwe ndi wosakhwima, zosavuta kumasula pambuyo knotting, ndipo ubwino wa chingwe waya lathyathyathya ndi kuti chingwe cha monofilament ndi chovuta, kuluka sikophweka kuzembera.Koma polypropylene ndi yolemera kuposa polyethylene.Mwachidziwitso, mamolekyu a propylene ndi CH3CH2CH3, ndipo mawonekedwe a ethylene ndi CH3CH3.Polypropylene ili ndi atomu imodzi ya carbon kuposa polyethylene, kotero kulemera kwa chingwe cha polypropylene ndi cholemera kuposa polyethylene.

Kapangidwe ka polyethylene ndi motere:

—(CH2-CH2-CH2-CH2)n—-

Kapangidwe ka polypropylene ndi motere:

—(CH2-CH(CH3)-CH2-CH(CH3)-CH2-CH(CH3))n—-

Zitha kuwoneka kuchokera pamapangidwe kuti polypropylene ili ndi unyolo wanthambi kuposa polyethylene.Pambuyo popanga chingwe, chifukwa cha udindo wa unyolo wa nthambi, chingwe cha polypropylene chimakhala ndi mphamvu yamphamvu kuposa polyethylene, ndipo sizovuta kuzembera.Kachulukidwe ka polypropylene ndi 0.91 ndipo kachulukidwe ka polyethylene ndi 0.93, motero polyethylene iyenera kukhala yolemera.

Chingwe cha polyethylene chimasinthasintha, chosalala komanso chofewa kuposa polypropylene.