Rabara ke mofuta oa thepa ea polymer e tenyetsehang haholo, tlas'a ts'ebetso ea matla a manyane a kantle, e ka bontša boemo bo phahameng ba ho se sebetse hantle, 'me ka mor'a hore matla a kantle a tlosoe, e ka khutlela sebopehong sa eona sa pele. Ka lebaka la ho tenyetseha ho phahameng ha rabara, e sebelisoa haholo ho cushion, shockproof, dynamic tial, jj. Ts'ebeliso indastering ea khatiso e kenyelletsa lirolara tse fapaneng tsa rabara le likobo tsa khatiso. Ka tsoelo-pele ea indasteri ea rabara, lihlahisoa tsa rabara li ntlafalitsoe ho tloha tšebelisong e le 'ngoe ea rabara ea tlhaho ho ea ho mefuta e fapaneng ea rabara ea maiketsetso.
1. Rabara ea tlhaho
Rabara ea tlhaho e laoloa ke li-hydrocarbon tsa rabara (polyisoprene), tse nang le protheine e nyane, metsi, li-acid tsa resin, tsoekere le letsoai le sa tloaelehang. Rabara ea tlhaho e na le ho tenyetseha ho hoholo, matla a ho thapolla, ho hanyetsa meokho ho hoholo le ho thibela motlakase, ho hanyetsa ho tsofala hantle le ho hanyetsa komello, ho sebetsa hantle, rabara ea tlhaho e bonolo ho hokahanngoa le lisebelisoa tse ling, 'me ts'ebetso ea eona ka kakaretso e betere ho feta rabara e ngata ea maiketsetso. Mefokolo ea rabara ea tlhaho ke ho hanyetsa ho fokola ha oksijene le ozone, ho tsofala habonolo le ho senyeha; ho hanyetsa ho fokolang ha oli le li-solvents, ho hanyetsa ho tlase ha asiti le alkali, ho hanyetsa ho tlase ha kutu; ho hanyetsa mocheso o tlase. Mefuta ea mocheso oa ts'ebetso ea rabara ea tlhaho: hoo e ka bang -60℃~+80℃Rabara ea tlhaho e sebelisetsoa ho etsa mabili, lieta tsa rabara, liphaephe, litheipi, likarolo tse sireletsang mocheso le likhetla tsa lithapo le likhoele, le lihlahisoa tse ling tse akaretsang. Rabara ea tlhaho e loketse haholo tlhahiso ea li-eliminator tsa ho thothomela ha torsional, li-absorber tsa enjene, litšehetso tsa mochini, likarolo tsa ho emisoa ha rabara le tšepe, li-diaphragm le lihlahisoa tse bōpiloeng.
2. SBR
SBR ke copolymer ea butadiene le styrene. Tshebetso ea rabara ea styrene-butadiene e batla e tšoana le ea rabara ea tlhaho, 'me hajoale ke eona tlhahiso e kholo ka ho fetisisa ea rabara ea maiketsetso e sebelisoang ka kakaretso. Litšobotsi tsa rabara ea styrene-butadiene ke hore ho hanyetsa ha eona ho tsofala, ho hanyetsa botsofali le ho hanyetsa mocheso ho feta rabara ea tlhaho, 'me sebopeho sa eona se tšoana ho feta rabara ea tlhaho. Mathata a rabara ea styrene-butadiene ke: ho tenyetseha ho tlase, ho hanyetsa ho fokola ha ho tenyetseha le ho hanyetsa ho taboha; ts'ebetso e fokolang ea ts'ebetso, haholo-holo ho khomarela ho fokolang le matla a tlase a rabara e tala. Mefuta ea mocheso ea rabara ea styrene-butadiene: hoo e ka bang -50℃~+100℃Rabara ea styrene butadiene e sebelisoa haholo ho nkela rabara ea tlhaho sebaka ho etsa mabili, maqephe a rabara, liphaephe, lieta tsa rabara le lihlahisoa tse ling tse akaretsang.
3. Rabara ea Nitrile
Rabara ea Nitrile ke copolymer ea butadiene le acrylonitrile. Rabara ea Nitrile e khetholloa ka ho hanyetsa ha eona hantle peterole le oli ea hydrocarbon ea aliphatic, e latelang rabara ea polysulfide, acrylic ester le rabara ea fluorine feela, ha rabara ea nitrile e phahametse rabara tse ling tse sebelisoang ka kakaretso. Ho hanyetsa mocheso hantle, ho tiea hantle ha moea, ho hanyetsa ho tsofala le ho hanyetsa metsi, le ho khomarela ho matla. Mathata a rabara ea nitrile ke ho hanyetsa serame ho fokolang le ho hanyetsa ozone, matla a tlase le ho tenyetseha, ho hanyetsa asiti e fokolang, ho thibela motlakase ho fokolang, le ho hanyetsa ho fokolang ha li-solvents tsa polar. Mefuta ea mocheso ea rabara ea nitrile: hoo e ka bang -30℃~+100℃Rabara ea nitrile e sebelisoa haholo ho etsa lihlahisoa tse fapaneng tse hanang oli, tse kang liphaephe, lihlahisoa tsa ho koala, lirolara tsa rabara, jj.
4. Rabara ea nitrile e nang le hydrogenated
Rabara ea nitrile e nang le hydrogen ke copolymer ea butadiene le acrylonitrile. Rabara ea nitrile e nang le hydrogen e fumanoa ka ho eketsa hydrogen ka botlalo kapa ka karolo litlamo tse peli ho butadiene ea NBR. Rabara ea nitrile e nang le hydrogen e khetholloa ka matla a phahameng a mechini le ho hanyetsa ho khohlela, ho hanyetsa mocheso ho molemo ho feta NBR ha e kopantsoe le peroxide, 'me litšobotsi tse ling li tšoana le rabara ea nitrile. Bothata ba rabara ea nitrile e nang le hydrogen ke theko ea eona e phahameng. Mefuta ea mocheso ea rabara ea nitrile e nang le hydrogen: hoo e ka bang -30℃~+150℃Rabara ea nitrile e nang le hydrogen e sebelisoa haholo-holo bakeng sa lihlahisoa tsa ho koala tse hanelang oli le tse hanelang mocheso o phahameng.
5. Rabara ea propylene ea ethylene
Rabara ea propylene ea ethylene ke copolymer ea ethylene le propylene, 'me ka kakaretso e arotsoe ka rabara tse peli tsa yuan ethylene propylene le rabara tse tharo tsa yuan ethylene propylene. Rabara ea ethylene-propylene e khetholloa ka khanyetso e ntle ea ozone, khanyetso ea ultraviolet, khanyetso ea boemo ba leholimo le khanyetso ea botsofali, e leng ea pele har'a liraba tse sebelisoang ka kakaretso. Rabara ea ethylene-propylene e na le insulation e ntle ea motlakase, khanyetso ea lik'hemik'hale, ho tenyetseha ha tšusumetso, khanyetso ea asiti le alkali, matla a khoheli a tlase, 'me e ka sebelisoa bakeng sa ho tlatsa haholo. Khanyetso ea mocheso e ka fihla ho 150°C, 'me e hanela li-solvents tsa polar - li-ketone, li-ester, jj., empa rabara ea ethylene propylene ha e hanele li-hydrocarbon tsa aliphatic le li-hydrocarbon tse nkhang hamonate. Litšobotsi tse ling tsa 'mele le tsa mechine tsa rabara ea ethylene propylene li tlase hanyane ho rabara ea tlhaho 'me li phahametse rabara ea styrene butadiene. Bothata ba rabara ea ethylene-propylene ke hore e na le ho itšoarella ho fokolang le ho khomarelana, 'me ha ho bonolo ho e kopanya. Mocheso oa rabara ea ethylene propylene: hoo e ka bang -50℃~+150℃Rabara ea ethylene-propylene e sebelisoa haholo-holo e le lesela la lisebelisoa tsa lik'hemik'hale, terata le sekwahelo sa thapo, hose ea mouoane, lebanta la conveyor le sa futhumatseng, lihlahisoa tsa rabara ea likoloi le lihlahisoa tse ling tsa indasteri.
6. Rabara ea silicone
Rabara ea silicone ke rabara e khethehileng e nang le liathomo tsa silicon le oksijene ketane e kholo. Karolo ea silicon e bapala karolo e kholo ho rabara ea silicone. Litšobotsi tse ka sehloohong tsa rabara ea silicone ka bobeli ke ho hanyetsa mocheso o phahameng (ho fihlela ho 300).°C) le khanyetso e tlase ea mocheso (e tlase ka ho fetisisa -100°C). Hona jwale ke rabara e ntle ka ho fetisisa e hanelang mocheso o phahameng; ka nako e ts'oanang, rabara ya silicone e na le ho thibela motlakase ho hoholo mme e tsitsitse ho oxidation ya mocheso le ozone. E hanela haholo mme ha e na dikhemikhale. Mathata a rabara ya silicone ke matla a tlase a mechini, ho hanyetsa oli hampe, ho hanyetsa solvent, ho hanyetsa asiti le alkali, ho thata ho e ntsha, mme e bitsa tjhelete e ngata. Mocheso wa tshebetso wa rabara ya silicone: -60℃~+200℃. Rabara ea silicone e sebelisoa haholo-holo ho etsa lihlahisoa tse hanyetsang mocheso o phahameng le o tlase (liphaephe, litiiso, jj.), le ho thibela terata le thapo tse thibelang mocheso o phahameng. Hobane ha e na chefo ebile ha e na tatso, rabara ea silicone e boetse e sebelisoa indastering ea lijo le ea bongaka.
7. Rabara ea polyurethane
Rabara ea polyurethane e na le elastomer e entsoeng ka ho polymerization ea polyester (kapa polyether) le metsoako ea diisocyanate. Rabara ea polyurethane e khetholloa ka ho hanyetsa ho hoholo ha moferefere, e leng eona e ntle ka ho fetisisa har'a mefuta eohle ea rabara; rabara ea polyurethane e na le matla a phahameng, ho tenyetseha ho hoholo le ho hanyetsa oli ho hoholo. Rabara ea polyurethane e boetse e ntle haholo ho hanyetseng ozone, ho hanyetsa botsofali, le ho tiea ha moea. Mathata a rabara ea polyurethane ke ho hanyetsa mocheso ho fokolang, ho hanyetsa metsi le alkali ho fokolang, le ho hanyetsa ho fokolang li-hydrocarbon tse nkhang hamonate, li-hydrocarbon tse nang le chlorine, le li-solvents tse kang li-ketone, li-ester le li-alcohols. Mefuta ea mocheso oa tšebeliso ea rabara ea polyurethane: hoo e ka bang -30℃~+80℃Rabara ea polyurethane e sebelisoa ho etsa mabili a haufi le likarolo, li-gasket, lihlahisoa tse sa thekeseleng, li-roller tsa rabara, le lihlahisoa tsa rabara tse sa tsofaleng, tse matla haholo le tse sa keneleng oli.
Nako ea poso: Phupu-07-2021
