Roj hmab yog ib hom khoom siv polymer uas muaj zog heev, nyob rau hauv qhov kev ua ntawm lub zog sab nraud me me, nws tuaj yeem ua rau muaj kev hloov pauv ntau, thiab tom qab lub zog sab nraud raug tshem tawm, nws tuaj yeem rov qab mus rau nws cov duab qub. Vim yog lub zog ntawm roj hmab, nws yog siv dav hauv kev ua kom lub hauv paus ruaj khov, tiv thaiv kev co, kev sib khi dynamic, thiab lwm yam. Daim ntawv thov hauv kev lag luam luam ntawv suav nrog ntau yam roj hmab dov thiab cov pam luam ntawv. Nrog rau kev nce qib ntawm kev lag luam roj hmab, cov khoom roj hmab tau tsim los ntawm kev siv roj hmab ntuj ib zaug mus rau ntau yam roj hmab hluavtaws.
1. Roj hmab ntuj
Cov roj hmab ntuj yog cov roj hmab hydrocarbons (polyisoprene), uas muaj me ntsis protein, dej, resin acids, suab thaj thiab inorganic ntsev. Cov roj hmab ntuj muaj elasticity loj, lub zog tensile siab, tiv taus kua muag zoo heev thiab rwb thaiv hluav taws xob, tiv taus hnav zoo thiab tsis muaj kev kub ntxhov, ua tau zoo, cov roj hmab ntuj yooj yim sib txuas nrog lwm cov ntaub ntawv, thiab nws cov kev ua tau zoo dua li feem ntau cov roj hmab synthetics. Qhov tsis zoo ntawm cov roj hmab ntuj yog tsis kam rau oxygen thiab ozone, yooj yim laus thiab puas tsuaj; tsis kam rau roj thiab cov kuab tshuaj, tsis kam rau acid thiab alkali, tsis kam rau corrosion; tsis kam kub. Qhov kub ua haujlwm ntawm cov roj hmab ntuj: txog -60℃~+80℃Cov roj hmab ntuj siv los ua cov log tsheb, khau roj hmab, cov kav dej, cov ntaub nplaum, cov txheej rwb thaiv tsev thiab cov ntaub thaiv ntawm cov xov hlau thiab cov cables, thiab lwm yam khoom dav dav. Cov roj hmab ntuj tsim tshwj xeeb rau kev tsim cov torsional vibration eliminators, engine shock absorbers, tshuab txhawb nqa, roj hmab-hlau ncua cov ntsiab lus, diaphragms, thiab cov khoom pwm.
2. SBR
SBR yog ib qho copolymer ntawm butadiene thiab styrene. Kev ua tau zoo ntawm styrene-butadiene roj hmab yog ze li ntawm cov roj hmab ntuj, thiab tam sim no nws yog qhov loj tshaj plaws ntawm cov roj hmab hluavtaws dav dav. Cov yam ntxwv ntawm styrene-butadiene roj hmab yog tias nws txoj kev tiv thaiv kev hnav, kev laus tiv thaiv thiab kev tiv thaiv cua sov tshaj li cov roj hmab ntuj, thiab nws cov qauv yog sib xws dua li cov roj hmab ntuj. Qhov tsis zoo ntawm styrene-butadiene roj hmab yog: qis elasticity, tsis zoo flex tsis kam thiab tear tsis kam; kev ua haujlwm tsis zoo, tshwj xeeb tshaj yog tsis zoo tus kheej-adhesiveness thiab qis ntsuab roj hmab zog. Qhov kub ntawm styrene-butadiene roj hmab: txog -50℃~+100℃Cov roj hmab styrene butadiene feem ntau yog siv los hloov cov roj hmab ntuj los ua cov log tsheb, cov ntawv roj hmab, cov hoses, khau roj hmab thiab lwm yam khoom dav dav.
3. Cov roj hmab nitrile
Cov roj hmab nitrile yog ib qho copolymer ntawm butadiene thiab acrylonitrile. Cov roj hmab nitrile yog tus cwj pwm los ntawm nws qhov kev tiv thaiv zoo rau roj av thiab aliphatic hydrocarbon roj, thib ob tsuas yog polysulfide roj hmab, acrylic ester thiab fluorine roj hmab, thaum cov roj hmab nitrile zoo dua li lwm cov roj hmab dav dav. Kev tiv thaiv kub zoo, huab cua nruj zoo, hnav tsis kam thiab dej tsis kam, thiab lo rau zoo. Qhov tsis zoo ntawm cov roj hmab nitrile yog kev tiv thaiv txias tsis zoo thiab ozone tsis kam, lub zog qis thiab elasticity, tsis kam acid tsis zoo, rwb thaiv tsev tsis zoo, thiab tsis kam rau cov kuab tshuaj polar. Qhov kub ntawm cov roj hmab nitrile: txog -30℃~+100℃Cov roj hmab nitrile feem ntau yog siv los tsim ntau yam khoom uas tiv taus roj, xws li cov hoses, cov khoom sealing, cov roj hmab rollers, thiab lwm yam.
4. Cov roj hmab nitrile hydrogenated
Cov roj hmab hydrogenated nitrile yog ib qho copolymer ntawm butadiene thiab acrylonitrile. Cov roj hmab hydrogenated nitrile tau los ntawm kev hydrogenating tag nrho lossis ib feem ntawm cov bonds ob npaug hauv butadiene ntawm NBR. Cov roj hmab hydrogenated nitrile yog tus cwj pwm los ntawm lub zog siab thiab kev tiv thaiv kev sib txhuam, kev tiv thaiv cua sov zoo dua NBR thaum crosslinked nrog peroxide, thiab lwm yam khoom zoo ib yam li cov roj hmab nitrile. Qhov tsis zoo ntawm cov roj hmab hydrogenated nitrile yog nws tus nqi siab dua. Qhov kub ntawm cov roj hmab hydrogenated nitrile: txog -30℃~+150℃Cov roj hmab nitrile hydrogenated feem ntau yog siv rau cov khoom siv sealing uas tiv taus roj thiab kub thiab txias.
5. Ethylene propylene roj hmab
Roj hmab ethylene propylene yog ib qho copolymer ntawm ethylene thiab propylene, thiab feem ntau muab faib ua ob yuan ethylene propylene roj hmab thiab peb yuan ethylene propylene roj hmab. Roj hmab ethylene-propylene yog tus cwj pwm los ntawm kev tiv thaiv ozone zoo heev, tiv thaiv ultraviolet, tiv thaiv huab cua thiab tiv thaiv kev laus, qeb duas thawj zaug ntawm cov roj hmab dav dav. Roj hmab ethylene-propylene muaj kev rwb thaiv hluav taws xob zoo, tiv thaiv tshuaj lom neeg, cuam tshuam elasticity, tiv thaiv acid thiab alkali, qhov hnyav tshwj xeeb qis, thiab tuaj yeem siv rau kev sau siab. Kev tiv thaiv kub tuaj yeem ncav cuag 150°C, thiab nws tiv taus cov kuab tshuaj polar-ketones, esters, thiab lwm yam, tab sis ethylene propylene roj hmab tsis tiv taus aliphatic hydrocarbons thiab aromatic hydrocarbons. Lwm yam khoom siv lub cev thiab cov khoom siv kho tshuab ntawm ethylene propylene roj hmab qis dua me ntsis rau cov roj hmab ntuj thiab zoo dua rau styrene butadiene roj hmab. Qhov tsis zoo ntawm ethylene-propylene roj hmab yog tias nws muaj kev nplaum tsis zoo thiab kev sib txuas ua ke, thiab nws tsis yooj yim rau kev sib txuas. Qhov kub thiab txias ntawm ethylene propylene roj hmab: txog -50℃~+150℃Cov roj hmab ethylene-propylene feem ntau yog siv ua cov khoom siv tshuaj lom neeg, cov hlau thiab cov hlua khi, cov kav dej ua pa, cov siv thauj khoom kub-resistant, cov khoom siv roj hmab hauv tsheb thiab lwm yam khoom lag luam.
6. Cov roj hmab silicone
Cov roj hmab silicone yog cov roj hmab tshwj xeeb uas muaj silicon thiab cov pa oxygen nyob rau hauv cov saw hlau tseem ceeb. Cov khoom silicon ua lub luag haujlwm tseem ceeb hauv cov roj hmab silicone. Cov yam ntxwv tseem ceeb ntawm cov roj hmab silicone yog ob qho tib si kub siab (txog li 300°C) thiab tsis kub heev (qis tshaj -100)°C). Tam sim no nws yog cov roj hmab zoo tshaj plaws uas tiv taus kub thiab txias; tib lub sijhawm, roj hmab silicone muaj kev rwb thaiv hluav taws xob zoo heev thiab ruaj khov rau thermal oxidation thiab ozone. Nws yog qhov tiv taus heev thiab tshuaj lom neeg inert. Qhov tsis zoo ntawm cov roj hmab silicone yog lub zog tsis tshua muaj zog, tsis kam roj, tsis kam tshuaj, tsis kam kua qaub thiab alkali, nyuaj rau vulcanize, thiab kim dua. Silicone roj hmab ua haujlwm kub: -60℃~+200℃Cov roj hmab silicone feem ntau yog siv los ua cov khoom tiv taus kub thiab qis (cov hoses, cov ntsaws ruaj ruaj, thiab lwm yam), thiab cov hlau thiab cable rwb thaiv tsev kub thiab txias. Vim tias nws tsis muaj tshuaj lom thiab tsis muaj saj, cov roj hmab silicone kuj tseem siv rau hauv kev lag luam khoom noj thiab kev kho mob.
7. Cov roj hmab polyurethane
Cov roj hmab polyurethane muaj ib qho elastomer tsim los ntawm polymerization ntawm polyester (lossis polyether) thiab diisocyanate compounds. Cov roj hmab polyurethane yog tus cwj pwm los ntawm kev tiv thaiv zoo, uas yog qhov zoo tshaj plaws ntawm txhua hom roj hmab; cov roj hmab polyurethane muaj lub zog siab, elasticity zoo thiab tiv thaiv roj zoo heev. Cov roj hmab polyurethane kuj zoo heev hauv kev tiv thaiv ozone, kev laus tiv thaiv, thiab cua nruj. Qhov tsis zoo ntawm cov roj hmab polyurethane yog qhov tsis kam kub tsis zoo, tsis kam dej thiab alkali tsis zoo, thiab tsis kam rau aromatic hydrocarbons, chlorinated hydrocarbons, thiab cov kuab tshuaj xws li ketones, esters, thiab cawv tsis zoo. Qhov kub ntawm kev siv cov roj hmab polyurethane: txog -30℃~+80℃. Cov roj hmab polyurethane yog siv los ua cov log tsheb ze rau cov khoom, gaskets, cov khoom tiv taus kev co, cov menyuam roj hmab, thiab cov khoom siv roj hmab uas tsis yooj yim hnav, muaj zog thiab roj.
Lub sijhawm tshaj tawm: Lub Xya Hli-07-2021
