Shanghai Huayingtong E-commerce Co., Ltd. is one of the leading Polyethylene Terephthalate (PET) suppliers in China and a professional Polyethylene Terephthalate (PET) manufacturer. Welcome to purchasePolyethylene Terephthalate (PET) from our factory.pls contact tom :service@skychemwin.com
Lebitso la Sehlahiswa:Polyethylene Terephthalate
Sebopeho sa molek'hule:C10H6O2
Nomoro ea CAS:25038-59-9
Sebopeho sa limolek'hule tsa sehlahisoa:
Polyethylene terephthalate (PET) ke polymer ea semi crystalline e nang le khanyetso e ntle ea lik'hemik'hale, ho qhibiliha ho sisinyeha le ho bilika. Polymer e entsoe ka likarolo tse pheta-phetoang joalokaha ho bontšitsoe setšoantšong sa 1. Sehlopha se seng le se seng se nang le bolelele ba 'mele bo ka bang 1.09 nm le boima ba molek'hule ~200. Ha e hlahisoa ka karabelo ea terephthalic acid le ethylene glycol, e kenngoa ka ho le letšehali ke H- le ho le letona ke -OH. Polymerization ka hona e tsamaisana le tlhahiso ea metsi a tlosoang tlas'a mocheso o phahameng le vacuum. Ka lebaka leo, ho ba teng ha metsi sebakeng se entsoeng ka ho qhibilihisoa ho tla senya sebopeho ka potlako e le hore ho omisoa ka botlalo ha polymer pele ho qhibiliha ho ohla ha likhoele ho hlokahala.
Lesale le monko o monate le kopantsoeng le ketane e khuts'oane ea aliphatic e etsa hore polymer e be molek'hule e thata ha e bapisoa le li-polymer tse ling tse kang polyolefin kapa polyamide. Ho haella ha segmental mobility liketane tsa polymer ho fella ka botsitso bo batlang bo le holimo ba mocheso. Polymer ea boemo ba masela e tla ba le palo e tloaelehileng ea li-unit tse 100 tse pheta-phetoang molek'hule ka 'ngoe e le hore bolelele bo atolositsoeng ba ketane e tloaelehileng ea polymer e ka ba 100nm ka boima ba molek'hule bo ka bang 20,000. Maemo a phahameng a polymerization a hlahisa likhoele tsa matla a phahameng empa ho qhibiliha ha viscosity le botsitso ba ho qhibiliha ho isa ho mongobo o monyane ho baka ho senyeha ha hydrolytic. Tekanyo ea tekanyo e tloaelehileng ea polymerization e etsoa ka viscosity e entsoeng ka ho qhibiliha (ka ho lekanya ho theoha ha khatello ka sekoti se lekantsoeng) kapa viscosity ea polymer e hlapolotsoeng ka har'a motsoako o loketseng. Ea ho qetela ke tekanyo ea bolelele ba ketane ea polymer e tsejoang e le Intrinsic viscosity kapa IV 'me boleng ba polymer e tloaelehileng ea fiber ke 0.6 dl/g ho 60/40 w/w motsoako oa phenol le tetrachloroethane solvent. IV ho solvent ea ho qetela e amana le Mv (Viscosity karolelano boima ba molek'hule) ea polymer ka Mark Howink equation (Equation 1).
Polyethylene terephthalate, eo hangata e bitsoang PET, ke setho sa lelapa la polyester ea li-polymers.Motsoako oa thepa e kang ho thatafala le ho tiea, ho tsitsa ha dimensional, lik'hemik'hale tse hanyetsanang le boima bo bobebe, ho etsa hore PET e be thepa e feto-fetohang e sebelisoang haholo lits'ebetsong tse ngata tse kang likhoele, maqephe. , lifilimi le lijana tsa lino tse tahang. E sebelisoa likarolong tsa motlakase ho kenyelletsa le metheo ea li-relay le li-sockets tsa mabone, matlo a pompo, likere, li-sprockets, matsoho a setulo, li-caster le lisebelisoa tsa thepa ea ka tlung.
Joalo ka li-polyester tse ling, PET e hlahisoa indastering ka esterification e tobileng ea li-dicarboxylic acid tse nang le diols. Mekhoa e tloaelehileng ea tlhahiso e thehiloe ho polymerization ea ethylene glycol (MEG) e nang le purifiedterephthalic acid (PTA) kapa dimethyl terephthalate (DMT) ka pel'a sesebelisoa sa tšepe. .
Chemwin e ka fana ka mefuta e mengata ea li-hydrocarbon tse ngata le li-solvents tsa lik'hemik'hale bakeng sa bareki ba indasteri.Pele ho moo, ka kopo bala lintlha tse latelang mabapi le ho etsa khoebo le rona:
1. Tshireletso
Tšireletseho ke eona ntho e tlang pele bophelong ba rona. Ntle le ho fa bareki tlhahisoleseling mabapi le ts'ebeliso e sireletsehileng le e baballang tikoloho ea lihlahisoa tsa rona, re boetse re ikemiselitse ho netefatsa hore likotsi tsa polokeho ea basebetsi le borakonteraka li fokotsoa ho ba bonyane bo utloahalang le bo ka khonehang. Ka hona, re hloka hore moreki a etse bonnete ba hore litekanyetso tse nepahetseng tsa ho laolla le ho boloka polokeho li fihlelleha pele ho tlisoa ha rona (ka kopo sheba sehlomathiso sa HSSE ho latela maemo le maemo a kakaretso a thekiso a ka tlase). Litsebi tsa rona tsa HSSE li ka fana ka tataiso mabapi le litekanyetso tsena.
2. Mokhoa oa ho fana
Bareki ba ka odara le ho fana ka lihlahisoa ho tsoa ho chemwin, kapa ba ka fumana lihlahisoa ho tsoa femeng ea rona ea tlhahiso. Mekhoa e teng ea lipalangoang e kenyelletsa lipalangoang tsa literaka, terene kapa mefuta e mengata (maemo a arohaneng a sebetsa).
Tabeng ea litlhoko tsa bareki, re ka hlakisa litlhoko tsa likepe kapa litanka mme ra sebelisa litekanyetso tse khethehileng tsa polokeho / tlhahlobo le litlhoko.
3. Palo e fokolang ea taelo
Haeba u reka lihlahisoa sebakeng sa rona sa marang-rang, palo e tlase ea odara ke lithane tse 30.
4.Tefo
Mokhoa o tloaelehileng oa ho lefa ke ho fokotsa ka kotloloho matsatsing a 30 ho tsoa ho invoice.
5. Litokomane tsa thomello
Litokomane tse latelang li fanoe ka thomello ka 'ngoe:
· Bill of Lading, CMR Waybill kapa tokomane e 'ngoe e amehang ea lipalangoang
· Setifikeiti sa Tlhahlobo kapa Tumellano (haeba ho hlokahala)
· Litokomane tse amanang le HSSE tumellanong le melaoana
· Litokomane tsa meetlo ho latela melaoana (haeba ho hlokahala)
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