Roj hmab yog ib yam ntawm cov khoom siv siab elastic polymer, nyob rau hauv qhov kev ua ntawm ib qho me me sab nraud quab yuam, nws muaj peev xwm qhia tau ib tug high degree ntawm deformability, thiab tom qab lub sab nraud quab yuam raug tshem tawm, nws muaj peev xwm rov qab mus rau nws cov qub duab.Vim lub siab elasticity ntawm roj hmab, nws yog dav siv hauv cushioning, shockproof, dynamic sealing, thiab lwm yam. Daim ntawv thov nyob rau hauv kev lag luam luam ntawv muaj xws li ntau yam roj hmab rollers thiab luam ntawv pam.Nrog rau kev nce qib ntawm kev lag luam roj hmab, cov khoom siv roj hmab tau tsim los ntawm ib qho kev siv cov roj hmab ntuj rau ntau hom roj hmab hluavtaws.
1. Cov roj hmab ntuj
Cov roj hmab ntuj yog cov roj hmab hydrocarbons (polyisoprene), muaj ib qho me me ntawm cov protein, dej, resin acids, suab thaj thiab inorganic ntsev.Cov roj hmab ntuj muaj elasticity loj, siab tensile lub zog, zoo heev tsim kua muag kuj thiab hluav taws xob rwb thaiv tsev, zoo hnav tsis kam thiab drought tsis kam, zoo processability, ntuj roj hmab yog ib qho yooj yim rau kev sib raug zoo nrog lwm cov ntaub ntawv, thiab nws tag nrho cov kev ua tau zoo tshaj li feem ntau hluavtaws roj hmab.Qhov tsis zoo ntawm cov roj hmab ntuj yog qhov tsis zoo rau cov pa oxygen thiab ozone, yooj yim rau kev laus thiab deterioration;tsis zoo rau cov roj thiab cov kuab tshuaj, tsis kam tiv thaiv acid thiab alkali, tsis muaj corrosion kuj;Tsawg kub tsis kam.Kev khiav hauj lwm kub ntawm cov roj hmab ntuj: txog -60℃~ + 80℃.Cov roj hmab ntuj yog siv los ua cov log tsheb, khau roj hmab, hoses, tapes, insulating txheej thiab sheaths ntawm cov xov hlau thiab cables, thiab lwm yam khoom siv dav dav.Cov roj hmab ntuj tshwj xeeb yog tsim rau kev tsim cov torsional vibration eliminators, engine shock absorbers, machine support, rubber-metal suspension elements, diaphragms, and molded products.
2. SIB
SBR yog copolymer ntawm butadiene thiab styrene.Kev ua tau zoo ntawm styrene-butadiene roj hmab yog ze rau ntawm cov roj hmab ntuj, thiab tam sim no yog qhov loj tshaj plaws ntawm cov khoom siv hluavtaws roj hmab.Cov yam ntxwv ntawm styrene-butadiene roj hmab yog tias nws hnav tsis kam, kev laus ua haujlwm thiab kub tsis kam tshaj cov roj hmab ntuj, thiab nws qhov kev ntxhib los mos yog ntau dua li cov roj hmab ntuj.Qhov tsis zoo ntawm styrene-butadiene roj hmab yog: tsis tshua muaj elasticity, tsis zoo flex kuj thiab tsim kua muag;kev ua haujlwm tsis zoo, tshwj xeeb tshaj yog tsis zoo rau tus kheej-adhesiveness thiab qis ntsuab roj hmab muaj zog.Qhov kub ntawm styrene-butadiene roj hmab: txog -50℃~ + 100℃.Styrene butadiene roj hmab yog siv los hloov cov roj hmab ntuj los ua cov log tsheb, cov ntawv roj hmab, hoses, khau roj hmab thiab lwm yam khoom siv dav dav.
3. Nitrile roj hmab
Nitrile roj hmab yog copolymer ntawm butadiene thiab acrylonitrile.Nitrile roj hmab yog tus cwj pwm los ntawm nws cov kev tiv thaiv zoo heev rau roj av thiab aliphatic hydrocarbon roj, thib ob tsuas yog cov roj hmab polysulfide, acrylic ester thiab fluorine roj hmab, thaum cov roj hmab nitrile zoo dua rau lwm cov roj hmab uas siv dav.Cov cua kub zoo, zoo huab cua nruj, hnav tsis kam thiab dej tsis kam, thiab muaj zog adhesion.Qhov tsis zoo ntawm cov roj hmab nitrile yog qhov tsis zoo rau kev txias txias thiab ozone tsis kam, tsis muaj zog thiab elasticity, tsis zoo acid tsis kam, tsis muaj hluav taws xob rwb thaiv tsev, thiab tsis zoo rau cov kuab tshuaj polar.Qhov ntsuas kub ntawm nitrile roj hmab: txog -30℃~ + 100℃.Nitrile roj hmab yog siv los tsim ntau yam khoom siv roj-resistant, xws li hoses, sealing khoom, roj hmab rollers, thiab lwm yam.
4. Hydrogenated nitrile roj hmab
Hydrogenated nitrile roj hmab yog copolymer ntawm butadiene thiab acrylonitrile.Cov roj hmab hydrogenated nitrile tau txais los ntawm tag nrho lossis ib nrab hydrogenating ob daim ntawv cog lus hauv butadiene ntawm NBR.Hydrogenated nitrile roj hmab yog tus cwj pwm los ntawm cov neeg kho tshuab siab zog thiab kev puas tsuaj, kev tiv thaiv tshav kub zoo dua NBR thaum sib txuas nrog peroxide, thiab lwm yam khoom zoo ib yam li cov roj hmab nitrile.Qhov tsis zoo ntawm hydrogenated nitrile roj hmab yog nws tus nqi siab dua.Qhov ntsuas kub ntawm hydrogenated nitrile roj hmab: txog -30℃~ + 150℃.Hydrogenated nitrile roj hmab yog tsuas yog siv rau roj-resistant thiab high-temperature-resistant sealing khoom.
5. Ethylene propylene roj hmab
Ethylene propylene roj hmab yog copolymer ntawm ethylene thiab propylene, thiab feem ntau muab faib ua ob yuan ethylene propylene roj hmab thiab peb yuan ethylene propylene roj hmab.Ethylene-propylene roj hmab yog tus cwj pwm los ntawm kev ua haujlwm zoo ozone, tiv thaiv ultraviolet, huab cua tsis kam thiab kev laus ua haujlwm, qeb duas ntawm cov roj hmab dav dav.Ethylene-propylene roj hmab muaj hluav taws xob rwb thaiv tsev zoo, tshuaj lom neeg tsis kam, cuam tshuam elasticity, acid thiab alkali tsis kam, tsis tshua muaj lub ntiajteb txawj nqus, thiab tuaj yeem siv rau siab filling.Lub tshav kub kuj tuaj yeem ncav cuag 150°C, thiab nws yog resistant rau polar solvents-ketones, esters, thiab lwm yam, tab sis ethylene propylene roj hmab tsis resistant rau aliphatic hydrocarbons thiab aromatic hydrocarbons.Lwm cov khoom siv lub cev thiab cov khoom siv ntawm ethylene propylene roj hmab yog me ntsis qis dua cov roj hmab ntuj thiab zoo dua rau cov roj hmab styrene butadiene.Qhov tsis zoo ntawm ethylene-propylene roj hmab yog tias nws muaj qhov tsis zoo ntawm tus kheej-adhesion thiab kev sib nrig sib adhesion, thiab nws tsis yooj yim rau kev sib raug zoo.Qhov kub ntawm ethylene propylene roj hmab: txog -50℃~ + 150℃.Ethylene-propylene roj hmab yog siv los ua cov khoom siv tshuaj lom neeg hauv ob sab phlu, xaim thiab cable sheathing, chav hose, tshav kub-resistant conveyor siv, tsheb roj hmab khoom thiab lwm yam khoom lag luam.
6. Silicone roj hmab
Silicone roj hmab yog cov roj hmab tshwj xeeb nrog silicon thiab oxygen atoms hauv cov saw tseem ceeb.Silicon element plays lub luag haujlwm tseem ceeb hauv silicone roj hmab.Cov yam ntxwv tseem ceeb ntawm silicone roj hmab yog ob qho tib si kub tsis kam (txog 300°C) thiab kub tsis kam (qis tshaj -100°C).Nws yog tam sim no qhov zoo tshaj plaws kub resistant roj hmab;Nyob rau tib lub sijhawm, silicone roj hmab muaj cov rwb thaiv tsev zoo heev thiab ruaj khov rau thermal oxidation thiab ozone.Nws yog heev resistant thiab chemically inert.Qhov tsis zoo ntawm cov roj hmab silicone yog cov tshuab tsis muaj zog, tsis muaj roj tsis zoo, hnyav tsis kam, acid thiab alkali tsis kam, nyuaj rau vulcanize, thiab kim dua.Silicone roj hmab ua haujlwm kub: -60℃~ + 200℃.Silicone roj hmab feem ntau yog siv los ua cov khoom kub thiab tsis kub resistant (hoses, seals, thiab lwm yam), thiab kub resistant hlau thiab cable rwb thaiv tsev.Vim tias nws tsis muaj tshuaj lom thiab tsis qab, silicone roj hmab kuj siv rau hauv cov khoom noj thiab kev kho mob kev lag luam.
7. Polyurethane roj hmab
Polyurethane roj hmab muaj elastomer tsim los ntawm polymerization ntawm polyester (los yog polyether) thiab diisocyanate tebchaw.Polyurethane roj hmab yog tus cwj pwm los ntawm kev puas tsuaj zoo, uas yog qhov zoo tshaj plaws ntawm txhua yam roj hmab;polyurethane roj hmab muaj lub zog siab, zoo elasticity thiab zoo heev roj kuj.Polyurethane roj hmab kuj zoo heev nyob rau hauv ozone kuj, aging kuj, thiab huab cua nruj.Qhov tsis zoo ntawm cov roj hmab polyurethane yog qhov tsis zoo ntawm qhov kub thiab txias, dej tsis zoo thiab alkali tsis kam, thiab tsis zoo rau cov ntxhiab hydrocarbons, chlorinated hydrocarbons, thiab cov kuab tshuaj xws li ketones, esters, thiab cawv.Kev siv kub ntau ntawm polyurethane roj hmab: txog -30℃~ + 80℃.Polyurethane roj hmab yog siv los ua cov log tsheb ze rau ntawm qhov chaw, gaskets, cov khoom siv shockproof, roj hmab rollers, thiab hnav-resistant, high-strength thiab roj-resistant khoom.
Lub sij hawm xa tuaj: Plaub Hlis-07-2021