Gulu la PP ndi zabwino ndi zovuta zake:
Polypropylene (PP) imagawidwa kukhala homo-polymer polypropylene (PP-H), chipika (impact) co-polymer polypropylene (PP-B) ndi mwachisawawa (mwachisawawa) co-polymer polypropylene (PP-R).Kodi ubwino, kuipa ndi ntchito za PP ndi ziti?Gawani nanu lero.
1. Homo-polymer polypropylene (PP-H)
Imapangidwa ndi polymerized kuchokera ku propylene monomer imodzi, ndipo unyolo wa maselo ulibe ethylene monomer, kotero kukhazikika kwa unyolo wa ma cell kumakhala kwakukulu, kotero kuti zinthuzo zimakhala ndi crystallinity yayikulu komanso kusagwira bwino ntchito.Pofuna kukonza brittleness ya PP-H, ena opanga zinthu zopangira amagwiritsanso ntchito njira yophatikizira mphira wa polyethylene ndi ethylene-propylene kuti zinthuzo zikhale zolimba, koma sizingathetse kukhazikika kwanthawi yayitali kwa PP. -H.ntchito
Ubwino: mphamvu zabwino
Zoyipa: kukana kukhudzidwa (kuwonongeka kwambiri), kusalimba mtima, kusakhazikika bwino, kukalamba kosavuta, kusakhazikika kwanthawi yayitali kwa kutentha.
Ntchito: Extrusion kuwomba kalasi, lathyathyathya thonje kalasi, jekeseni akamaumba kalasi, CHIKWANGWANI kalasi, kuwomberedwa filimu kalasi.Itha kugwiritsidwa ntchito pomanga, kuwomba mabotolo, maburashi, zingwe, zikwama zoluka, zoseweretsa, zikwatu, zida zamagetsi, zinthu zapakhomo, mabokosi a microwave, mabokosi osungira, kukulunga mafilimu.
Njira ya tsankho: moto ukayaka, waya ndi wophwanyika, ndipo siutali.
2. Mwachisawawa (mwachisawawa) copolymerized polypropylene (PP-R)
Iwo akalandira ndi co-polymerization wa propylene monoma ndi pang'ono ethylene (1-4%) monomer pansi zochita za kutentha, mavuto ndi chothandizira.Ethylene monomer imagawidwa mwachisawawa komanso mwachisawawa mu unyolo wautali wa propylene.Kuwonjezera mwachisawawa kwa ethylene kumachepetsa crystallinity ndi kusungunuka kwa polima, ndipo kumapangitsa kuti zinthu zitheke potengera zotsatira zake, kukana kwa nthawi yaitali kwa hydrostatic pressure, kukalamba kwa mpweya wotentha kwa nthawi yaitali, ndi kukonza chitoliro ndi kuumba.PP-R maselo unyolo dongosolo, ethylene monoma okhutira ndi zizindikiro zina zimakhudza mwachindunji kukhazikika kwa nthawi yaitali matenthedwe bata, mawotchi katundu ndi processing katundu wa zinthu.Kugawidwa kwachisawawa kwa ethylene monomer mu tcheni cha propylene molecular, ndikofunika kwambiri kusintha kwa zinthu za polypropylene.
Ubwino: magwiridwe antchito abwino, mphamvu zambiri, kukhazikika kwakukulu, kukana kutentha kwabwino, kukhazikika kwapakatikati, kulimba kwa kutentha kochepa (kusinthasintha kwabwino), kuwonekera bwino, gloss yabwino
Zoyipa: Kuchita bwino kwambiri mu PP
Ntchito: Extrusion kuwomba kalasi, filimu kalasi, jekeseni akamaumba kalasi.Machubu, mafilimu ocheperako, mabotolo odontha, zotengera zowonekera kwambiri, zinthu zapakhomo zowonekera, ma syringe otaya, mafilimu omata
Njira yozindikiritsira: sichikhala chakuda ikayaka, ndipo imatha kutulutsa waya wozungulira wautali
3. Block (impact) co-polymer polypropylene (PP-B)
Zomwe zili ethylene ndizokwera kwambiri, nthawi zambiri 7-15%, koma chifukwa chotheka kulumikiza ma ethylene monomers ndi ma monomers atatu mu PP-B ndiwambiri, zikuwonetsa kuti popeza ethylene monomer imangopezeka mugawo la block, The nthawi zonse. ya PP-H yafupika, kotero sichingakwaniritse cholinga chowongolera ntchito ya PP-H potengera malo osungunuka, kukana kwanthawi yayitali kwa hydrostatic pressure, kukalamba kwanthawi yayitali kwa okosijeni komanso kukonza mapaipi ndi kupanga.
Ubwino: kukana kwabwinoko, kusasunthika kwina kwina kumakulitsa mphamvu yakukhudzidwa
Zoipa: kutsika pang'ono, gloss yochepa
Ntchito: Extrusion kalasi, jekeseni akamaumba kalasi.Mabampa, zinthu zokhala ndi mipanda yopyapyala, zoyenda, zida zamasewera, katundu, ndowa za penti, mabokosi a batire, zotchingira zopyapyala
Njira yozindikiritsira: sichikhala chakuda ikayaka, ndipo imatha kutulutsa waya wozungulira wautali
Mfundo zodziwika: anti-hygroscopicity, asidi ndi kukana kwa dzimbiri zamchere, kukana kusungunuka, kukana kwa okosijeni pa kutentha kwakukulu.
Kuthamanga kwa MFR kwa PP kuli pakati pa 1-40.Zida za PP zokhala ndi MFR zotsika zimakhala ndi kukana kwabwinoko koma kutsika kwa ductility.Kwa zinthu zomwezo za MFR, mphamvu ya mtundu wa co-polymer ndi yapamwamba kuposa ya mtundu wa homo-polymer.Chifukwa cha crystallization, kuchepa kwa PP ndikokwera kwambiri, nthawi zambiri 1.8-2.5%.
