Ndi zinthu ziti zomwe zili bwino, PET kapena PP?

Poyerekeza ndi zipangizo za PET ndi PP, PP idzakhala yopambana kwambiri pakuchita.
1. Kusiyana ndi tanthauzo
PET(Polyethylene terephthalate) Dzina lasayansi ndi polyethylene terephthalate, yomwe imadziwika kuti polyester resin, ndi utomoni.
PP(polypropylene) dzina lasayansi ndi polypropylene, lomwe ndi polima lopangidwa ndi kuwonjezera polymerization ya propylene, ndipo ndi thermoplastic synthetic resin.
2.Kuchokera ku makhalidwe a kusiyana
(1) PET
①PET ndi polima yoyera yamkaka kapena yachikasu yopepuka kwambiri yokhala ndi malo osalala komanso owala.
②PET zinthu zili ndi kukana kutopa kwabwino, kukana kwa abrasion ndi kukhazikika kwa mawonekedwe, kuvala kochepa komanso kuuma kwakukulu, mphamvu yopindika ya 200MPa, ndi zotanuka modulus ya 4000MPa.
③Zinthu za PET zimakhala ndi ntchito yabwino kwambiri komanso yotsika kwambiri yokana kutentha, yomwe imatha kugwiritsidwa ntchito kwa nthawi yayitali kutentha kwa 120 ° C, ndipo imatha kupirira kutentha kwa 150 ° C pakanthawi kochepa komanso kutentha kochepa kwa -70 ° C.
④ Ethylene glycol yomwe imagwiritsidwa ntchito popanga PET imakhala yotsika mtengo komanso yotsika mtengo.
⑤Zinthu za PET sizikhala ndi poizoni, zimakhala ndi kukhazikika bwino kwa mankhwala, komanso zimalimbana ndi ma acid ofooka ndi zosungunulira za organic, koma sizilimbana ndi kumizidwa m'madzi otentha ndi alkali.
(2) PP
①PP ndi zinthu zoyera za waxy zowoneka bwino komanso zopepuka. Ndiwo mtundu wopepuka kwambiri wa ma resin omwe amagwiritsidwa ntchito kwambiri.
②PP zakuthupi zili ndi zida zabwino zamakina komanso kukana kutentha kwabwino, ndipo kutentha kosalekeza kogwiritsa ntchito kumatha kufika 110-120 °C.
③PP zinthu zili ndi kukhazikika kwa mankhwala ndipo sizimalumikizana ndi mankhwala ambiri kupatula ma oxidants amphamvu.
④PP zinthu zili ndi kutentha kwapamwamba kosungunuka ndi mphamvu yokhazikika, ndipo kuwonekera kwa filimuyi ndikwambiri.
Zinthu za ⑤PP zili ndi zotchingira bwino kwambiri zamagetsi, koma ndizosavuta kukalamba komanso zimakhala ndi mphamvu zochepa pakutentha kochepa.
3. Kusiyana kwa ntchito
PET imagwiritsidwa ntchito kwambiri, monga kupota mu polyester fiber, ndiko kuti, polyester; monga pulasitiki, imatha kuwomberedwa m'mabotolo osiyanasiyana; monga zida zamagetsi, mayendedwe, magiya, ndi zina.
Zinthu za PP zimagwiritsidwa ntchito kwambiri popanga jakisoniakamaumba mankhwala, mafilimu, mapaipi, mbale, ulusi, zokutira, etc., komanso zipangizo zapakhomo, nthunzi, mankhwala, zomangamanga, mafakitale kuwala ndi zina.