Ntuj Roj Hmab (NR)
Ntuj Roj Hmab yog tsim los ntawm latex sau los ntawm cov ntoo roj hmab thiab yog ib tug polymer ntawm isoprene. Nws muaj kev ua haujlwm zoo heev, siab elasticity, tensile zog, thiab elongation. Nws muaj hnub nyoog yooj yim hauv huab cua, ua nplaum thaum cua sov, thiab yooj yim swells thiab yaj hauv cov roj ntxhia lossis roj av. Nws yog alkali - resistant tab sis tsis resistant rau muaj zog acids. Nws yog cov khoom siv raw rau kev ua cov kab xev, hoses, thiab khau roj hmab, thiab yog tsim rau kev poob siab- nqus cov khoom thiab cov khoom siv hauv tsheb nres tsheb, ethanol, thiab lwm yam hydroxyl- muaj kua.
Styrene-Butadiene Roj Hmab (SBR)
Styrene-butadiene roj hmab (SBR) yog ib copolymer ntawm butadiene thiab styrene. Piv rau cov roj hmab ntuj, nws muaj qhov zoo sib xws thiab tsawg dua impurities, tab sis nws lub zog txhua yam tsis muaj zog. Nws tuaj yeem sib xyaw nrog cov roj hmab ntuj.
Butyl Roj Hmab (IIR)
Butyl roj hmab yog polymerized los ntawm isobutylene thiab ib qho me me ntawm isoprenes. Nws khaws ib tug me me ntawm unsaturated pawg rau vulcanization. Vim yog qhov steric hindrance ntawm methyl pawg, nws cov molecular motion yog tsawg dua li lwm cov polymers, uas ua rau cov roj permeability tsawg. Nws muaj kev tiv thaiv siab rau tshav kub, tshav ntuj, thiab ozone, thiab zoo heev hluav taws xob rwb thaiv tsev. Nws kuj qhia tau hais tias muaj zog tiv thaiv cov kuab tshuaj polar xws li cawv, ketones, thiab esters. Nws qhov kev khiav hauj lwm kub yog -54 ~ 110 degree.
Ethylene Propylene Roj Hmab (EPDM)
Ethylene propylene roj hmab yog copolymerized los ntawm ethylene thiab propylene. Nws cov saw tseem ceeb tsis muaj ob txoj hlua khi, ua rau muaj kev kub ntxhov zoo heev, kev laus ua haujlwm, ozone tsis kam, thiab ruaj khov. Txawm li cas los xij, nws tsis tuaj yeem ua vulcanized. Txhawm rau daws qhov teeb meem no, ib qho me me ntawm cov khoom thib peb nrog ob lub saw hlau yog nkag rau hauv EP cov saw tseem ceeb, tso cai rau vulcanization, yog li tsim EPDM. Nws qhov kev khiav hauj lwm kub yog -50 ~ 150 degree. Nws muaj qhov ua tau zoo heev rau cov kuab tshuaj polar xws li cawv, ketones, ethylene glycol, thiab phosphate ester hydraulic kua.
Nitrile Roj Hmab (NBR)
Nitrile roj hmab yog copolymerized los ntawm acrylonitrile thiab butadiene. Cov ntsiab lus acrylonitrile yog li ntawm 18% mus rau 50%. Cov ntsiab lus acrylonitrile siab dua muab kev tiv thaiv zoo dua rau cov roj petrochemical thiab hydrocarbon fuels, tab sis qis qis dua - qhov kub thiab txias. Qhov kev khiav hauj lwm kub yog -25 txog 100℃. Nitrile roj hmab yog ib qho ntawm cov roj hmab feem ntau siv rau cov roj foob thiab O-rings.
Chlorosulfonated Polyethylene Rubber
Chlorosulfonated polyethylene (Hypalon, Polyethylene) yog patented hluavtaws roj hmab los ntawm DuPont. Nws muaj kev tiv thaiv kub zoo, huab cua tsis kam, thiab ozone kuj; Nws kuj muaj cov kua qaub zoo thiab feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum tau ua rau cov neeg ua haujlwm oxidizing (nitric acid, sulfuric acid). Qhov kev khiav hauj lwm kub yog -45 txog 120 degree.