PP classification le thepa melemo le go tlhoka mesola:
Polypropylene (PP) e arotsoe ka homo-polymer polypropylene (PP-H), block (impact) co-polymer polypropylene (PP-B) le random (random) co-polymer polypropylene (PP-R).Melemo, mathata le ts'ebeliso ea PP ke efe?E arolelane le uena kajeno.
1. Homo-polymer polypropylene (PP-H)
E entsoe ka polymerized ho tloha ho propylene monomer e le 'ngoe,' me ketane ea molek'hule ha e na ethylene monomer, kahoo ho tloaeleha ha ketane ea limolek'hule ho phahame haholo, kahoo thepa e na le crystallinity e phahameng le ts'ebetso e mpe ea ts'ebetso.Bakeng sa ho ntlafatsa brittleness ea PP-H, barekisi ba bang ba thepa e tala le bona ba sebelisa mokhoa oa ho kopanya rabara ea polyethylene le ethylene-propylene ho ntlafatsa ho tiea ha thepa, empa ha e khone ho rarolla botsitso ba nako e telele ba PP. -H.tshebetso
Melemo: matla a matle
Mefokolo: ho hanyetsa tšusumetso e mpe (ho brittle ho feta), ho se sebetse hantle, botsitso bo fokolang, ho tsofala habonolo, ho se tsitse ha mocheso nako e telele.
Kopo: Kereiti ea "Extrusion blowing", kereiti ea khoele e bataletseng, kereiti ea ho bopa ente, kereiti ea faeba, kereiti ea filimi e phatlohileng.E ka sebelisoa bakeng sa likhoele, libotlolo tse buloang, borashe, liropo, mekotla e lohiloeng, lintho tsa ho bapala, lifoldara, lisebelisoa tsa motlakase, lintho tsa ntlo, mabokose a lijo tsa motšeare oa microwave, mabokose a polokelo, lifilimi tsa pampiri tse phuthelang.
Mokhoa oa khethollo: ha mollo o chesoa, terata e bataletse, 'me ha e telele.
2. Random (random) copolymerized polypropylene (PP-R)
E fumanoa ka co-polymerization ea propylene monomer le e nyenyane ethylene (1-4%) monomer tlas'a ketso ea mocheso, khatello le catalyst.Ethylene monomer e aroloa ka mokhoa o sa reroang le ka mokhoa o sa reroang ka har'a ketane e telele ea propylene.Ho eketsoa ka mokhoa o sa reroang ha ethylene ho fokotsa kristale le ntlha ea ho qhibiliha ha polymer, 'me ho ntlafatsa ts'ebetso ea thepa ho latela tšusumetso, ho hanyetsa khatello ea nako e telele ea hydrostatic, botsofali ba nako e telele ea oksijene ea mocheso, le ho sebetsa ha pipe le ho bōptjoa.Sebopeho sa ketane ea limolek'hule tsa PP-R, litaba tsa ethylene monomer le matšoao a mang li na le tšusumetso e tobileng holim'a botsitso ba nako e telele ea mocheso, thepa ea mechine le thepa ea ho sebetsa ea thepa.Ha ho ajoa ka tšohanyetso ha ethylene monomer ka ketane ea limolek'hule tsa propylene, ho bohlokoa le ho feta phetoho ea thepa ea polypropylene.
Melemo: ts'ebetso e ntle e felletseng, matla a phahameng, ho tiea ho hoholo, ho hanyetsa mocheso o motle, botsitso bo botle ba sebopeho, ho tiea ha mocheso o tlase (ho fetoha habonolo), pepeneneng e ntle, gloss e ntle.
Mefokolo: ts'ebetso e ntle ka ho fetisisa ho PP
Kopo: Kereiti ea ho phatloha ha Extrusion, sehlopha sa filimi, kereiti ea ho bopa ente.Li-tubes, lifilimi tse nyenyefatsang, libotlolo tsa marotholi, lijana tse bonaletsang haholo, lihlahisoa tsa ntlo tse pepeneneng, li-syringe tse lahliloeng, lifilimi tsa pampiri tse phuthelang.
Mokhoa oa ho tsebahatsa: ha e fetohe e ntšo ka mor'a ho khantša, 'me e ka ntša terata e telele e chitja
3. Thibela (tšusumetso) co-polymer polypropylene (PP-B)
Likahare tsa ethylene li batla li phahame, ka kakaretso ke 7-15%, empa hobane monyetla oa ho hokahanya monomers tse peli tsa ethylene le li-monomers tse tharo ho PP-B li phahame haholo, ho bontša hore kaha ethylene monomer e teng feela karolong ea block, The regularity. ea PP-H e fokotsehile, ka hona e ke ke ea finyella morero oa ho ntlafatsa ts'ebetso ea PP-H mabapi le ntlha ea ho qhibiliha, ho hanyetsa khatello ea nako e telele ea hydrostatic, botsofali ba nako e telele ea mocheso oa oksijene le ho sebetsa ha pipe le ho theha.
Melemo: ho hanyetsa tšusumetso e ntle, tekanyo e itseng ea ho tiea e ntlafatsa matla a tšusumetso
Mefokolo: pepeneneng e tlase, khanya e tlase
Kopo: Kereiti ea Extrusion, kereiti ea ho bopa ente.Li-bumpers, lihlahisoa tsa marako a masesaane, li-stroller, lisebelisoa tsa lipapali, thōtō, libakete tsa pente, mabokose a betri, lihlahisoa tsa marako a masesaane.
Mokhoa oa ho tsebahatsa: ha e fetohe e ntšo ka mor'a ho khantša, 'me e ka ntša terata e telele e chitja
Lintlha tse tloaelehileng: anti-hygroscopicity, acid le alkali corrosion resistance, ho hanyetsa ho qhibiliha, ho hanyetsa oxidation e fokolang mocheso o phahameng.
Sekhahla sa phallo ea MFR ea PP e boemong ba 1-40.Lisebelisoa tsa PP tse nang le MFR e tlase li na le matla a ho hanyetsa empa li na le ductility e tlase.Bakeng sa lisebelisoa tse tšoanang tsa MFR, matla a mofuta oa co-polymer a phahame ho feta a mofuta oa homo-polymer.Ka lebaka la kristale, shrinkage ea PP e phahame haholo, ka kakaretso ke 1.8-2.5%.
