Metswako ya rabara ke thepa e feto-fetohang e seng e le ya bohlokwa indastering ya sejwalejwale. Ka ho kopanya di-polymer tsa motheo le di-filler, di-plasticizer, di-curing agent, le di-additi tse ding, bahlahisi ba ka iketsetsa thepa ya mechine, ya mocheso le ya dikhemikhale ho fihlela ditlhoko tse ikgethang. Metswako ya rabara e arotswe ka bophara ka mekhahlelo e mmedi e meholo: rabara ya tlhaho (NR) le rabara ya maiketsetso. Dirabara tsa maiketsetso di arotswe ka mefuta ya merero e akaretsang le e ikgethang. Sehlopha se seng le se seng se bontsha dibopeho tse ikgethang tse etsang qeto ya hore na di loketse diindasteri tse fapaneng.
1. Rabara ea Tlhaho (NR)
E nkiloe ho latex ea sefate sa Hevea brasiliensis, rabara ea tlhaho e nkoa e le ea bohlokoa ka lebaka la matla a eona a ikhethang a ho thapolla, ho hanyetsa ho taboha le ho tenyetseha. E boetse e na le khanyetso e ntle ea mokhathala le ho bokellana ha mocheso o tlase tlas'a mojaro oa potoloho. Leha ho le joalo, NR e na le khanyetso e fokolang ho oli, li-solvents, ozone le mahlaseli a UV, 'me ts'ebetso ea eona ea fokotseha mochesong o phahameng.
Ditshebediso: Rabara ya tlhaho e sebediswa haholo mabiling bakeng sa dikoloi tsa bapalami, diteraka le difofane, haholo-holo maboteng a mahlakoreng le di-tread moo ho tenyetseha le ho mamella dikotsi di leng bohlokwa. Ditshebediso tse ding di kenyeletsa mabanta a tsamaisang thepa, di-damper tsa ho thothomela, di-spring tsa rabara, dikhomaretsi, diatlana tsa latex, dibalune le di-sole tsa dieta.
2. Rubber ea Maiketsetso - Mefuta ea Morero o Akaretsang
Lirabara tsa maiketsetso tse sebelisoang ka kakaretso li etselitsoe ho nkela kapa ho tlatsana le rabara ea tlhaho lits'ebetsong tse ngata, tse fanang ka khanyetso e betere khahlanong le botsofali, ho hohlana kapa mocheso.
· Rabara ea Styrene-Butadiene (SBR): Rabara ea maiketsetso e hlahisoang ka ho fetisisa, SBR e fana ka khanyetso e ntle ea ho khohlela, botsitso ba botsofali, le ho tšoara ka metsi, leha e na le matla a tlase a ho thaepa le ho tenyetseha ho feta NR. E laola indasteri ea mabili (li-treads), hammoho le mabanta a tsamaisang thepa, liphaephe, li-gasket, lithaele tsa fatše le lithaele tsa lieta.
· Rubber ea Polybutadiene (BR): Ka ho hanyetsa ho hoholo ha lehare, hysteresis e tlase (tahlehelo e tlase ea matla), le ho tenyetseha ho phahameng esita le mochesong o tlase, BR hangata e kopanngoa le NR kapa SBR ho ntlafatsa ho hanyetsa ho tsofala. Ts'ebeliso ea eona e kenyelletsa li-tread tsa mabili le mabota a mahlakoreng, libolo tsa kolofo, likoahelo tsa li-roller tsa conveyor, le li-impact modifiers bakeng sa polasetiki.
· Rubber ea Butyl (IIR): E tsebahala ka ho se kenelle ha eona moeeng le likhase, hammoho le thepa e ntle ea ho monya metsi le ho hanyetsa ozone. IIR e bohlokoa haholo liphaepheng tse ka hare, li-liner tsa ka hare tsa mabili, li-bladder tse phekolang, li-stopper tsa meriana le likarolo tsa maske ea khase.
3. Rubber ea Maiketsetso - Mefuta e Ikhethang
Lirabara tse khethehileng li entsoe bakeng sa libaka tse feteletseng tse nang le mocheso o phahameng, lik'hemik'hale tse matla, mafura, kapa maemo a leholimo a kantle. Li na le litheko tse holimo empa li nolofalletsa lits'ebetso tsa bohlokoa.
· Rabara ea Nitrile (NBR): E hanyetsa hantle oli, mafura le metsoako e thehiloeng ho peterole, hammoho le thepa e ntle ea mechini ho pholletsa le mocheso o pharaletseng (–35°C ho isa ho +120°C). NBR ke tekanyetso ea liphaephe tsa mafura, litiiso tsa oli, li-O-ring, li-gasket, liphaephe tsa hydraulic, liatlana bakeng sa ho sebetsana le lik'hemik'hale le li-roller tsa khatiso.
· Rabara ea Chloroprene (CR – Neoprene): Elastomer e leka-lekaneng e fanang ka khanyetso e itekanetseng ea oli, khanyetso e ntle ea boemo ba leholimo le ozone, ho lieha ha mollo, le thepa e tsitsitseng ea mechini. CR e sebelisoa haholo mabanteng a likoloi (mabanta a nako le a serpentine), lijakete tsa cable, lisutu tsa metsi, li-glue formulations, li-bridge bearing, le weather stripping.
· Rabara ea Ethylene-Propylene (EPM/EPDM): E hanyetsa mocheso ka tsela e ikhethang (ho fihlela ho 150°C), ozone, UV, mouoane le metsi a polar, empa ha e lumellane le oli le mafura. EPDM e laola liphaephe tsa sistimi ea ho pholisa ea likoloi, litiiso tsa boemo ba leholimo, lera la marulelo, insulation ea motlakase, li-liner tsa letamo le likarolo tsa sistimi ea brake.
· Rabara ea Silicone (Q): Ka mefuta ea litšebeletso ho tloha ho -60°C ho isa ho +230°C (kapa ho feta bakeng sa limaraka tse khethehileng), rabara ea silicone e fana ka ho tenyetseha ho hoholo, ho thibela motlakase, ho lumellana le lintho tse phelang, le ho hanyetsa ho ntšoa ha corona. E sebelisoa liphaepheng tsa bongaka, li-implant, li-nipple tsa botlolo ea masea, limmate tsa ho baka, li-insulator tse nang le motlakase o phahameng, litiiso tsa lifofane, le li-keypad tse hokahaneng.
· Li-fluoroelastomer (FKM, Viton®): Khetho ea bohlokoa bakeng sa khanyetso e feteletseng ea lik'hemik'hale le mocheso. Li-FKM li mamella mocheso o fihlang ho 250°C ka ho tsoelang pele 'me li hanela hoo e ka bang oli tsohle, mafura, li-acid le li-solvents. Lisebelisoa li kenyelletsa litiiso tsa enjene ea lifofane, li-O-ring tsa sistimi ea mafura a likoloi, li-gasket tsa limela tsa lik'hemik'hale, lisebelisoa tsa tlhahiso ea semiconductor, le likarolo tsa ho cheka oli.
4. Li-Elastomer tsa Thermoplastic (TPE)
Le hoja e se lirabara tsa thermoset tse tloaelehileng, li-TPE li kopanya ho tenyetseha ho kang rabara le ho sebetsa ho kang polasetiki. Li-TPE li ka sebelisoa hape 'me ha li hloke ho phekoloa. Mefuta e tloaelehileng e kenyelletsa li-copolymer tsa block tsa styrenic (SBS, SEBS) le li-polyurethane tsa thermoplastic (TPU). Li sebelisoa meheleng e bonolo, matlalong a kahare a likoloi, ho koahela lisebelisoa tsa bongaka, lithaele tsa lieta le ho kenya mocheso oa terata.
Kakaretso ea Indasteri
· Likoloi le Lipalangoang: Bareki ba bangata ba metsoako ea rabara. Lithaere (NR, SBR, BR, IIR), liphaephe (NBR, EPDM), litiiso (FKM, NBR), mabanta (CR, EPDM), le li-vibration mounts (NR) kaofela li itšetlehile ka mekhoa e itseng ea rabara ho netefatsa polokeho, katleho le ho tšoarella.
· Tlhahiso ea Liindasteri: Mabanta a Conveyor (NR, SBR), lirolara (NBR, PU), li-gasket (tse fapaneng), litiiso tsa hydraulic (TPU, NBR), le li-vibration isolation pads (NR) li boloka lifeme le mechini li sebetsa.
· Lifofane le Tšireletso: Lirabara tse sebetsang hantle tse kang FKM le silicone li sebelisoa bakeng sa litiiso tsa sistimi ea mafura, li-O-ring tsa hydraulic, likobo tsa thermal, le litiiso tsa khatello ea cabin, moo ho hloleha e seng khetho.
· Bongaka le Tlhokomelo ea Bophelo: Rabara ea silicone le rabara ea butyl li laola sebaka sena bakeng sa li-plunger tsa syringe, li-vial stopper, liphaephe le lithapo tsa lisebelisoa tse aparoang ka lebaka la ho lumellana ha tsona le ho se bolaee likokoana-hloko.
· Kaho le Meralo ea Motheo: Meralo ea marulelo a EPDM, li-gasket tsa lifensetere tsa CR, li-bearing pad tsa borokho ba NR, le li-silicone sealant li fana ka tšireletso ea boemo ba leholimo, bolulo ba katoloso, le bophelo bo bolelele mehahong le mererong ea boenjiniere ba sechaba.
· Thepa ea Bareki: Lieta tsa lieta (SBR, BR, TPE), thepa ea lipapali (libolo tsa kolofo, mapheo a ho qoela – NR/CR), liatlana tsa lapeng (NR, NBR), le mabokose a lisebelisoa tsa elektroniki (TPE) li bontša ho tenyetseha ha rabara bophelong ba letsatsi le letsatsi.
Qetello
Ho hlophisoa ha metsoako ea rabara ho ea ho li-elastomer tsa tlhaho, tsa maiketsetso tse sebelisoang ka kakaretso, tsa maiketsetso tse khethehileng, le tsa thermoplastic ho bontša mefuta e mengata ea litlhoko tsa ts'ebetso ho pholletsa le liindasteri. Ho tloha ho SBR e theko e tlaase mabiling a likoloi ho ea ho FKM e turang lienjeneng tsa jete, motsoako o mong le o mong oa rabara ke thepa e entsoeng ka hloko e tlatsetsang polokehong, bokgabaneng le boqaping. Ha lits'ebetso tse ncha li hlaha likoloing tsa motlakase, matla a nchafatsoang, le theknoloji e aparoang, nts'etsopele ea metsoako e tsoetseng pele ea rabara e tla tsoela pele ho bapala karolo ea bohlokoa saenseng ea thepa le boenjiniere.
Nako ea poso: Mots'eanong-14-2026
