Kusiyana pakati pa polyethylene chingwe ndi polypropylene chingwe

Posachedwapa, kasitomala anafunsa za mtengo wa PP danline chingwe.Makasitomala ndi wopanga yemwe amatumiza maukonde osodza kunja.Kawirikawiri, amagwiritsa ntchito chingwe cha polyethylene.Koma chingwe cha polyethylene chimakhala chosalala komanso chabwino komanso chosavuta kumasula pambuyo popanga mfundo.Ubwino wa chingwe cha PP danline ndi kapangidwe kake ka fiber.Ulusi wake ndi waukali ndipo mfundo yake siterera.

Mwachidziwitso, njira ya molekyulu ya propylene ndi: CH3CH2CH3, ndipo mamolekyu a ethylene ndi: CH3CH3.

Kapangidwe ka polypropylene ndi motere:

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

Kapangidwe ka polyethylene ndi motere:

— (CH2-CH2-CH2-CH2) n —-

Zitha kuwoneka kuchokera pamapangidwe kuti polypropylene ili ndi chingwe chimodzi cha nthambi kuposa polyethylene.Chingwe chikapangidwa, chifukwa cha ntchito ya unyolo wanthambi, chingwe cha polypropylene chimakhala ndi mphamvu yolimba kwambiri kuposa polyethylene ndipo mfundoyo siimaterera.

Chingwe cha polyethylene chimasinthasintha komanso chosalala kuposa polypropylene, ndipo chimamveka chofewa.

Kachulukidwe wa polypropylene ndi 0.91, ndipo kachulukidwe ka polyethylene ndi 0.93.Kotero chingwe cha PE ndi cholemera kuposa chingwe cha PP.