Litiiso tsa rabara tsa polyurethane, e entsoeng ka thepa ea rabara ea polyurethane, ke likarolo tsa bohlokoa mefuteng e mengata ea liindasteri. Litiiso tsena li tla ka mefuta e fapaneng, ho kenyeletsoa li-O-rings, V-rings, U-rings, Y-rings, litiiso tse khutlonnetsepa, litiiso tse bōpehileng joaloka tloaelo, le li-washer tse tiisang.
Rabara ea polyurethane, polymer ea maiketsetso, e koala lekhalo pakeng tsa rabara ea tlhaho le polasetiki e tloaelehileng. E sebelisoa haholo ts'ebetsong ea khatello ea pampiri ea tšepe, rabara ea polyurethane eo ho buuoang ka eona ke ea mofuta oa polyester casting. E entsoe ho tloha ho adipic acid le ethylene glycol, e hlahisang polymer e nang le boima ba molek'hule e ka bang 2000. Polymer ena e tsoela pele ho itšoara ho etsa prepolymer e nang le lihlopha tsa ho qetela tsa isocyanate. Joale prepolymer e kopantsoe le MOCA (4,4′-methylenebis(2-chloroaniline)) ebe e kenngoa ka har'a hlobo, e lateloa ke vulcanization ea bobeli ho hlahisa lihlahisoa tsa rabara tsa polyurethane tse nang le maemo a thata a sa tšoaneng.
Ho thatafala ha litiiso tsa rabara ea polyurethane ho ka etsoa ho kopana le litlhoko tse khethehileng tsa ts'ebetso ea tšepe, ho tloha ho 20A ho ea ho 90A ka sekhahla sa boima ba Shore.
Litšobotsi tsa Bohlokoa tsa Ts'ebetso:
- Khanyetso e Ikhethileng ea ho Wear: rabara ea polyurethane e bonts'a khanyetso e phahameng ka ho fetisisa ea ho apara har'a mefuta eohle ea rabara. Liteko tsa laboratori li bonts'a hore khanyetso ea eona ea ho sesa ke makhetlo a 3 ho isa ho a 5 ho feta ea rabara ea tlhaho, 'me lits'ebetso tsa lefats'e hangata li bonts'a makhetlo a 10 ho tšoarella.
- Matla a Phahameng le Matla a Matla: Ka har'a sebaka se thata sa Shore A60 ho isa ho A70, rabara ea polyurethane e bonts'a matla a holimo le elasticity e ntle haholo.
- Superior Cushioning and Shock Absorption: Mocheso oa kamore, likaroloana tsa rabara ea polyurethane li ka monya 10% ho isa ho 20% ea matla a ho sisinyeha, ka litekanyetso tse phahameng tsa ho monya ka maqhubu a eketsehileng a thothomela.
- Ho hanyetsa Lik'hemik'hale ka ho Fetisisa: Rabara ea polyurethane e bontša kamano e fokolang bakeng sa oli ea liminerale e seng polar 'me e lula e sa amehe haholo ke mafura (joaloka parafine le peterole) le oli ea mechine (joaloka hydraulic le oli e tlotsang), li-rabara tse sebetsang ka kakaretso le rabara ea nitrile e loantšanang. Leha ho le joalo, e bontša ho ruruha ho hoholo ha lino tse tahang, li-ester le li-hydrocarbon tse nkhang hamonate.
- High Friction Coefficient: Hangata ka holimo ho 0.5.
- Lintho tse Eketsehileng: Ho hanyetsa mocheso o tlase, ho hanyetsa ozone, ho hanyetsa mahlaseli, ho kenya motlakase le thepa ea ho khomarela.
Lisebelisoa:
Ka lebaka la thepa ea eona e phahameng ea 'mele le ea mechine, rabara ea polyurethane e atisa ho sebelisoa lits'ebetsong tse phahameng tsa ts'ebetso, ho kenyelletsa le lihlahisoa tse sa senyeheng, lintho tse matla tse hanyetsanang le oli, le likarolo tse phahameng tsa modulus tse thata haholo. E fumana tšebeliso e pharaletseng ho liindasteri tse fapaneng:
- Mechini le Likoloi: Ho etsa lintho tse thibelang mariki a maqhubu a phahameng, likarolo tsa rabara tse thibelang ho thothomela, liliba tsa rabara, likhokahano le likarolo tsa mochini oa masela.
- Lihlahisoa tse Hanyetsang Oli: Ho hlahisa lirolara tsa khatiso, litiiso, lijana tsa mafura le litiiso tsa oli.
- Tikoloho ea Harsh Friction: E sebelisoa liphaepheng tse tsamaisang thepa, lilaneng tsa lisebelisoa tse silang, li-skrini, li-filters, li-soles tsa lieta, mabili a khohlano, lihlahla, li-brake pads le lithaere tsa libaesekele.
- Cold Pressing le ho Kobeha: E sebetsa e le sesebelisoa bakeng sa lits'ebetso tse ncha tsa ho hatella le ho kobeha, ho nkela litšepe tse nkang nako le tse jang chelete e ngata.
- Foam Rubber: Ka ho matlafatsa karabelo ea lihlopha tsa isocyanate ka metsi ho lokolla CO2, rabara ea foam e bobebe e nang le thepa e ntle ea mochini e ka hlahisoa, e loketseng ho kenya letsoho, ho kenya mocheso, ho thibela molumo, le lits'ebetso tse thibelang ho thothomela.
- Lisebelisoa tsa Bongaka: E sebelisoa likarolong tse sebetsang tsa rabara, methapo ea mali ea maiketsetso, letlalo la maiketsetso, li-tubes tsa infusion, lisebelisoa tsa ho lokisa, le lisebelisoa tsa meno.
Nako ea poso: Sep-17-2025