Ka 1958, Goodrich Chemical Company (eo hona joale e bitsoang Lubrizol) e ile ea ngolisa lets'oao la TPU la Estane lekhetlo la pele.Lilemong tse 40 tse fetileng, ho bile le mabitso a marang-rang a fetang 20 lefatšeng ka bophara, 'me mofuta o mong le o mong o na le letoto la lihlahisoa tse' maloa.Hajoale, baetsi ba thepa e tala ba TPU ba kenyelletsa haholo BASF, Covestro, Lubrizol, Huntsman Corporation, Wanhua Chemical Group, Shanghai Heng'an, Ruihua, Xuchuan Chemical, jj.
1, Sehlopha sa TPU
Ho ea ka sebopeho sa karolo e bonolo, e ka aroloa ka mofuta oa polyester, mofuta oa polyether, le mofuta oa butadiene, oo ka ho latellana o nang le sehlopha sa ester, sehlopha sa ether, kapa sehlopha sa butene.
Ho latela sebopeho sa karolo e thata, e ka aroloa ka mofuta oa urethane le mofuta oa urethane urea, tse fumanoang ka ho latellana ho tsoa ho ethylene glycol chain extenders kapa diamine chain extenders.Sehlopha se tloaelehileng se arotsoe ka mofuta oa polyester le mofuta oa polyether.
Ho latela boteng kapa ho se be teng ha cross-linking, e ka aroloa ka thermoplastic e hloekileng le semi thermoplastic.
Ea pele e na le sebopeho se hloekileng sa linear 'me ha se na li-cross-linking bond;Ea ho qetela e na le palo e nyane ea li-bond tse amanang le sefapano tse kang Allophanic acid ester.
Ho latela ts'ebeliso ea lihlahisoa tse feliloeng, li ka aroloa ka likarolo tse hlophisitsoeng (likarolo tse fapaneng tsa Mochini), liphaephe (li-sheaths, li-bar profiles), lifilimi (maqephe, lipoleiti tse tšesaane), likhomaretsi, likhoele, likhoele, jj.
2, Tšimoloho ea TPU
TPU ke ea polyurethane ho latela sebopeho sa limolek'hule.Joale, e ile ea kopana joang?
Ho latela mekhoa e fapaneng ea ho kopanya, e arotsoe haholo ka bongata ba polymerization le tharollo ea polymerization.
Ka polymerization e ngata, e ka aroloa ka mokhoa oa pele oa polymerization le mokhoa oa mohato o le mong ho latela boteng kapa ho se be teng ha karabelo ea pele:
Mokhoa oa prepolymerization o kenyelletsa ho sebetsana le diisocyanate ka macromolecular diols ka nako e itseng pele o eketsa katoloso ea ketane ho hlahisa TPU;
Mokhoa oa mohato o le mong o kenyelletsa ka nako e le 'ngoe ho kopanya le ho sebetsana le li-macromolecular diols, diisocyanate, le li-extensions tsa ketane ho theha TPU.
Polymerization ea tharollo e kenyelletsa ho qala ka ho qhaqha diisocyanate ka har'a solvent, ebe o eketsa li-macromolecular diols ho itšoara ka nako e itseng, 'me qetellong e kenye li-extensions tsa ketane ho hlahisa TPU.
Mofuta oa karolo e bonolo ea TPU, boima ba limolek'hule, likarolo tse thata kapa tse bonolo, 'me boemo ba ho kopanya ba TPU bo ka ama letsoalo la TPU, ka boima ba hoo e ka bang 1.10-1.25,' me ha ho na phapang e kholo ha e bapisoa le liraba le lipolasetiki tse ling.
Ka boima bo ts'oanang, boima ba mofuta oa polyether TPU bo tlase ho feta ba mofuta oa polyester TPU.
3. Ts'ebetso ea TPU
Likaroloana tsa TPU li hloka lits'ebetso tse fapaneng ho theha sehlahisoa sa ho qetela, haholo ho sebelisoa mekhoa ea ho qhibiliha le tharollo bakeng sa ts'ebetso ea TPU.
Ts'ebetso ea ho qhibiliha ke mokhoa o sebelisoang hangata indastering ea polasetiki, joalo ka ho kopanya, ho roala, ho extrusion, ho bopa le ho bopa;
Tharollo ea tharollo ke mokhoa oa ho lokisetsa tharollo ka ho qhibiliha likaroloana ka har'a solvent kapa ka ho toba polymerizing bona ka solvent, ebe ho roala, ho ohla, joalo-joalo.
Sehlahisoa sa ho qetela se entsoeng ka TPU ka kakaretso ha se hloke karabelo ea vulcanization crosslinking, e ka khutsufatsang potoloho ea tlhahiso le ho sebelisa litšila hape.
4. Ts'ebetso ea TPU
TPU e na le modulus e phahameng, matla a phahameng, bolelele bo phahameng le elasticity, khanyetso e ntle ea ho roala, ho hanyetsa oli, ho hanyetsa mocheso o tlase, le ho hanyetsa botsofali.
Matla a phahameng a matla, bolelele bo phahameng, le sekhahla se tlase sa nako e telele sa khatello ea nako e telele ke melemo ea bohlokoa ea TPU.
XiaoU e tla qaqisa haholo ka thepa ea mochini ea TPU ho tsoa likarolong tse joalo ka matla a thata le bolelele, botsitso, boima, jj.
Matla a phahameng a tsitsipano le bolelele bo phahameng
TPU e na le matla a matla a ho tsitsa le bolelele.Ho tsoa ho data e setšoantšong se ka tlase, re ka bona hore matla le bolelele ba polyether mofuta oa TPU li molemo haholo ho feta tsa polasetiki ea polyvinyl chloride le rabara.
Ntle le moo, TPU e ka fihlela litlhoko tsa indasteri ea lijo ka li-additives tse nyane kapa tse se nang letho tse kentsoeng nakong ea ts'ebetso, tseo hape ho leng thata hore lisebelisoa tse ling tse kang PVC le rabara li fihlelle.
Resilience e ameha haholo mochesong
Ho tiea ha TPU ho bolela tekanyo eo ka eona e khutlelang kapele ho boemo ba eona ba pele ka mor'a hore khatello ea deformation e imolohe, e hlahisoang e le matla a ho hlaphoheloa, e leng karolelano ea mosebetsi oa ho khutlisa deformation mosebetsing o hlokahalang ho hlahisa deformation.Ke ts'ebetso ea modulus e matla le khohlano ea ka hare ea 'mele o otlolohileng mme e na le kutloelo-bohloko haholo ho mocheso.
Rebound e fokotseha ka ho fokotseha ha mocheso ho fihlela mocheso o itseng, 'me elasticity e eketseha ka potlako hape.Mocheso ona ke mocheso oa crystallization oa karolo e bonolo, e khethiloeng ke sebopeho sa macromolecular diol.TPU ea mofuta oa polyether e tlase ho feta mofuta oa polyester TPU.Ka mocheso o ka tlase ho mocheso oa crystallization, elastomer e ba thata haholo 'me e lahleheloa ke elasticity ea eona.Ka hona, ho tiea ho tšoana le ho khutla ho tloha holim'a tšepe e thata.
Mofuta oa boima ke Shore A60-D80
Ho thatafala ke sesupo sa bokhoni ba thepa ea ho hana ho fetoha, ho hlaba le ho ngoapa.
Ho thatafala ha TPU hangata ho lekanngoa ho sebelisoa lisebelisoa tsa ho thatafala tsa Shore A le Shore D, moo Shore A e sebelisetsoang li-TPU tse bonolo le Shore D e sebelisetsoang li-TPU tse thata.
Ho thatafala ha TPU ho ka fetoloa ka ho lokisa karolo ea likarolo tse bonolo le tse thata tsa ketane.Ka hona, TPU e na le mefuta e mengata ea boima ba 'mele, ho tloha Shore A60-D80, e nkang boima ba rabara le polasetiki, 'me e na le elasticity e phahameng ho pholletsa le mefuta eohle ea boima.
Ha boima bo ntse bo fetoha, likarolo tse ling tsa TPU li ka fetoha.Ka mohlala, ho eketsa boima ba TPU ho tla fella ka liphetoho tsa ts'ebetso tse kang ho eketseha ha modulus le matla a ho taboha, ho eketseha ho tsitsitseng le khatello ea kelello (bokhoni ba mojaro), ho fokotseha ha bolelele, ho eketseha ha sekhahla le ho hlahisa mocheso o matla, le ho eketseha ha khanyetso ea tikoloho.
5. Tšebeliso ea TPU
Joalo ka elastomer e ntle haholo, TPU e na le mefuta e mengata e fapaneng ea litaelo tsa sehlahisoa 'me e sebelisoa haholo litlhoko tsa letsatsi le letsatsi, thepa ea lipapali, lintho tsa ho bapala, lisebelisoa tsa mekhabiso le likarolo tse ling.
Lisebelisoa tsa lieta
TPU e sebelisoa haholo-holo bakeng sa lisebelisoa tsa lieta ka lebaka la elasticity ea eona e babatsehang le ho hanyetsa ho apara.Lihlahisoa tsa lieta tse nang le TPU li phutholohile ho feta lihlahisoa tsa lieta tse tloaelehileng, kahoo li sebelisoa haholo lihlahisoa tsa lieta tsa boemo bo phahameng, haholo-holo lieta tse ling tsa lipapali le lieta tse tloaelehileng.
hose
Ka lebaka la bonolo ba eona, matla a matle a ho tsitsa, matla a tšusumetso, le ho hanyetsa mocheso o phahameng le o tlaase, li-hose tsa TPU li sebelisoa haholo Chaena e le liphaephe tsa khase le oli bakeng sa lisebelisoa tsa mechine tse kang lifofane, litanka, likoloi, lithuthuthu le lisebelisoa tsa mochine.
thapo
TPU e fana ka khanyetso ea meokho, ho hanyetsa ho roala, le litšoaneleho tsa ho kobeha, ka ho hanyetsa mocheso o phahameng le o tlase e le senotlolo sa ts'ebetso ea cable.Kahoo 'marakeng oa Chaena, lithapo tse tsoetseng pele tse kang lithapo tsa taolo le likhoele tsa motlakase li sebelisa li-TPU ho sireletsa lisebelisoa tsa ho roala tsa meralo e rarahaneng ea likhoele,' me lits'ebetso tsa bona li ntse li ata haholo.
Lisebelisoa tsa bongaka
TPU ke thepa e nkelang sebaka sa PVC e bolokehileng, e tsitsitseng le ea boleng bo holimo, e ke keng ea ba le Phthalate le lintho tse ling tse kotsi tsa lik'hemik'hale, 'me e tla fallela maling kapa lino tse ling tse ka har'a catheter ea bongaka kapa mokotla oa bongaka ho baka litla-morao.Hape ke sehlopha sa extrusion se ntlafalitsoeng ka ho khetheha le sehlopha sa ente ea TPU.
filimi
Filimi ea TPU ke filimi e tšesaane e entsoeng ka thepa ea granular ea TPU ka mekhoa e khethehileng e kang ho roala, ho lahla, ho butsoela le ho roala.Ka lebaka la matla a eona a phahameng, ho hanyetsa ho roala, elasticity e ntle, le ho hanyetsa boemo ba leholimo, lifilimi tsa TPU li sebelisoa haholo indastering, thepa ea lieta, ho kenya liaparo, likoloi, lik'hemik'hale, tsa elektroniki, tsa bongaka le tse ling.
Nako ea poso: Feb-05-2020