Cov khoom siv raw rau cov roj hmab expansion pob qij txha muaj xws li EPDM roj hmab, roj hmab nitrile, chloroprene roj hmab, roj hmab ntuj, fluororubber, thiab lwm yam. Cov hauv qab no yuav qhia cov yam ntxwv thiab qhov zoo ntawm txhua yam khoom.
1. EPDM expansion sib koom ua ke
Kev ua tau zoo heev, nrog rau ozone tsis kam, huab cua tsis kam, kub tsis kam, tsis kub tsis kam, tshuaj lom neeg tsis kam, ntau yam tshuaj tiv thaiv, thiab tsis tshua muaj txheeb ze. Qhov tsis zoo yog tias nws muaj kev nthuav dav loj hauv cov roj thiab cov roj nplua nyeem, thiab feem ntau yog cov khoom siv xim tsaus nti. Qhov ntsuas kub ntawm kev siv yog -60 ~ +150 degree, uas yog tsim rau kub kub, txias txias, ntug hiav txwv dej, thaj chaw uas muaj zog ultraviolet hluav taws xob, thiab nruab nrab mus rau high-sawv vaj tse. Nws muaj ntau yam kev siv thiab kev ua tau zoo tshaj plaws.
2. Neoprene expansion sib koom ua ke
Piv nrog rau lwm cov roj hmab, qee qhov ntawm lawv muaj kev ua haujlwm tsis zoo, tab sis qhov kev ua tau zoo tag nrho yog qhov zoo. Lawv muaj cov huab cua zoo heev, ozone tsis kam, kub laus tiv thaiv, roj thiab hnyav tsis kam, tshuaj lom neeg ua haujlwm zoo, nplaim taws ua haujlwm zoo, zoo adhesion, tsis zoo cia ruaj khov, thiab tej zaum yuav muaj hardening thaum lub sij hawm cia, ua rau tsis txias txias. Cov tuab tuab, feem ntau yog xim dub, haum rau cov roj thiab cov cua sov tiv thaiv ib puag ncig, haum rau qhov kub thiab txias ntawm -30 ~ +120 degree .
3. NBR expansion sib koom ua ke
Cov yam ntxwv tseem ceeb yog roj thiab hnyav tsis kam, tab sis nws tsis tiv taus cov xov xwm xws li ketones, lipids, thiab chlorinated hydrocarbons. Nws elasticity thiab mechanical zog yog zoo, tab sis nws qhov tsis zoo yog yooj yim aging thiab tawg hauv ozone thiab oxidation, tsis txias tsis kam, thiab kub tsis kam. Qhov ntsuas kub rau kev siv yog -30 ~ +120 degree
4. Fluorine roj hmab expansion sib koom ua ke
Fluorine roj hmab (FPM) yog ib qho organic elastomer tsim los ntawm copolymerization ntawm fluorinated monomers, tus yam ntxwv los ntawm kev kub siab mus txog 300 degree, acid thiab alkali tsis kam, roj tsis kam, hluav taws xob tsis kam, thiab lub tshuab nqus tsev zoo; Hluav taws xob rwb thaiv tsev, kev ua haujlwm zoo, tshuaj tiv thaiv corrosion, ozone tsis kam, thiab atmospheric aging kuj yog txhua yam zoo, tab sis qhov tsis zoo yog cov txheej txheem tsis zoo, tus nqi kim, tsis zoo txias, tsis tshua muaj elasticity thiab breathability, thiab kev siv kub ntau yog {{1} } ~ +200 degree
5. Ntuj roj hmab expansion sib koom ua ke
Siab elasticity, nyob ntawm tus qauv, qhov siab tshaj plaws elasticity tuaj yeem ncav cuag 80%. High elongation, mus txog 1000%. Lub elastic modulus thiab shear modulus yog qhov tsawg, qis dua li qee cov khoom tsis zoo xws li hlau. Vim cov roj hmab ntuj yog cov roj hmab crystalline, nws lub zog muaj zog heev hauv cov roj hmab, thiab nws muaj qhov txias txias. Cov iav hloov pauv kub yog -72 degree . Tsawg ntom ntom ntom, Raw roj hmab density tsawg dua 1g / cm ^ 3. Tsis tau hloov kho, tab sis cov roj hmab kuj tseem ua tau zoo thiab roj ua kom kub. Cov roj tsis zoo thiab tshuaj lom neeg tsis kam (tshwj tsis yog alkali). Hauv cov concentrated hydrochloric acid, roj hmab yuav hnov mob nrog HCl los tsim cov yeeb yaj kiab tiv thaiv ntawm qhov chaw, tiv thaiv cov tshuaj tiv thaiv ntxiv.
