Polyethylene terephthalate Foromo ea lik'hemik'hale ke -OCH2-CH2OCOC6H4CO- Lebitso la Senyesemane: polyethylene terephthalate, e khutsufalitsoeng e le PET, ke polymer e phahameng, e nkiloeng karabelong ea ho fifala ha metsi ea ethylene terephthalate. Ethylene terephthalate e fumanoa ka karabelo ea esterification ea terephthalic acid le ethylene glycol. PET ke polymer e tšoeu joaloka lebese kapa e mosehla o bobebe, e nang le kristale e ngata e nang le bokaholimo bo boreleli le bo benyang. E na le litšobotsi tse ntle tsa 'mele le tsa mechini maemong a fapaneng a mocheso. Mocheso oa tšebeliso ea nako e telele o ka fihla ho 120°C. Ho thibela motlakase ho hotle haholo. Esita le mochesong o phahameng le maqhubung a phahameng, litšobotsi tsa eona tsa motlakase li ntse li le ntle, empa khanyetso ea corona e fokola. Khanyetso ea ho thekesela, khanyetso ea mokhathala, khanyetso ea khohlano, le botsitso ba litekanyo kaofela li ntle haholo.
monyetla
1, e na le thepa e ntle ea mechini, matla a tšusumetso a makhetlo a 3-5 ho feta lifilimi tse ling, 'me khanyetso ea ho mena e ntle.
2, e hanela oli, mafura, e fokotsa asiti, e fokotsa alkali le boholo ba dihlapolli.
3, e na le khanyetso e ntle ea mocheso o phahameng le o tlase. E ka sebelisoa nako e telele mochesong oa 120℃, 'me e ka mamella mocheso o phahameng oa 150℃ le mocheso o tlase oa -70℃ ts'ebelisong ea nako e khuts'oane, 'me litšobotsi tsa mechini tsa mocheso o phahameng le o tlase ha li na phello e kholo.
4, ho kenella ha mouoane oa khase le metsi ho tlase, ke hore, ho na le khanyetso e ntle ea khase, metsi, oli le monko.
5, ponaletso e phahameng, e ka thibela mahlaseli a ultraviolet, e benya hantle.
6, ha e na chefo, ha e na tatso, e na le bohloeki bo botle le polokeho, e ka sebelisoa ka ho toba bakeng sa ho paka lijo.
PET ke polymer e tšoeu kapa e mosehla o bobebe e nang le kristale e ngata e nang le bokaholimo bo boreleli le bo benyang. Ho hanyetsa ho hasana hantle, ho hanyetsa mokhathala, ho hanyetsa khohlano le botsitso ba litekanyo, ho taboha ho tlase le ho thatafala ho hoholo, ka ho tiea ho hoholo har'a thepa ea thermoplastic: ho thibela motlakase hantle, tšusumetso e tlase mochesong, empa ho hanyetsa corona ho fokola. Mocheso, ho hanyetsa boemo ba leholimo, botsitso bo botle ba ho hanyetsa lik'hemik'hale, ho monya metsi a fokolang, ho hanyetsa li-acid tse fokolang le li-solvents tsa organic, empa ha li qoelisoe metsing a chesang le alkali. Resin ea PET e na le mocheso o phahameng oa phetoho ea khalase, lebelo le liehang la kristale, potoloho e telele ea ho bopa, potoloho e telele ea ho bopa, ho fokotseha ho hoholo ha ho bopa, botsitso bo fokolang ba litekanyo, ho robeha ha ho bopa kristale, le ho hanyetsa mocheso o tlase. Ka ntlafatso ea moemeli oa nucleating, moemeli oa kristale le matlafatso ea fiber ea khalase, PET e na le litšobotsi tse latelang ho phaella ho thepa ea PBT:
1, mocheso oa ho sotha mocheso le mocheso oa tšebeliso ea nako e telele ke tsona tse phahameng ka ho fetisisa har'a thepa ea thermoplastic e sebelisoang ka kakaretso.
2, ka lebaka la ho hanyetsa mocheso o phahameng, PET e matlafalitsoeng e qoelisoa ka bateng ea solder ka mocheso oa 250°C metsotsoana e 10, 'me hoo e batlang e sa fetole' mala. E loketse haholo bakeng sa ho lokisa likarolo tsa elektroniki le tsa motlakase tse soldered.
3, matla a ho kobeha ke 200Mpa, modulus e tenyetsehang ke 4000Mpa, ho hanela ho thekesela le mokhathala le hona ho hotle haholo, bothata ba bokaholimo bo phahame, 'me thepa ea mechini e tšoana le ea polasetiki ea thermosetting.
4, kaha ethylene glycol e sebelisoang tlhahisong ea PET e batla e le halofo ea theko ea butylene glycol e sebelisoang tlhahisong, resin ea PET le PET e matlafalitsoeng ke theko e tlase ka ho fetisisa har'a polasetiki ea boenjiniere 'me li na le ts'ebetso e phahameng ea litšenyehelo.