TOP 5 Elastomers YeGasket & Seal Application
Chii chinonzi elastomers? Izwi rinobva pa "elastic" -chimwe chezvinhu zvakakosha zverabha. Mazwi ekuti "rabha" uye "elastomer" anoshandiswa zvakafanana kureva mapolymer ane viscoelasticity-inowanzo kunzi "elasticity." Izvo zvemukati zvimiro zve elastomers zvinosanganisira kuchinjika, kurebesa kwepamusoro uye musanganiswa wekusimba uye kunyorova (kunyorovesa inzvimbo yerabha inoita kuti ishandure magetsi emagetsi kuti apise kana ichinge yakanganiswa). Iyi yakasarudzika seti yezvivakwa inoita kuti elastomer ive yakanakira zvinhu zvegaskets, zvisimbiso, isolat ors, nezvimwe.
Kwemakore, kugadzirwa kwe elastomer kwatama kubva ku rabha rechisikigo rakaburitswa kubva mumuti latex kuenda kune yakanyatso kugadzirwa rabha inosanganisa misiyano. Mukugadzira misiyano iyi, zvivakwa zvakati zvinowanwa nerubatsiro rwezvinowedzerwa senge mafirita kana mapurasitiki kana nekusiyana kwehuwandu hwemukati mukati meiyo copolymer chimiro. Iko kushanduka kwekugadzirwa kwe elastomer kunogadzira zviuru zve elastomer mikana inogona kugadzirwa, kugadzirwa uye kuwanikwa mukati memusika.
Kuti usarudze chinhu chakakodzera, munhu anofanirwa kutanga aongorora maitiro akajairwa ekuita elastomer mugasket uye seal application. Paunenge uchisarudza chinhu chinoshanda, mainjiniya anowanzo fanirwa kutora akawanda ezvikonzero mukutarisisa. Mamiriro ebasa senge tembiricha yekushanda, mamiriro ezvakatipoteredza, kusangana kwemakemikari, uye zvemuchina kana zvemuviri zvinodiwa zvese zvinoda kunyatsotariswa. Zvichienderana nekushandiswa, aya mamiriro esevhisi anogona kukanganisa zvakanyanya kuita uye tarisiro yehupenyu ye elastomer gasket kana chisimbiso.
Tiine pfungwa idzi mupfungwa, ngationgororei mashanu emaelastomers anonyanya kushandiswa egasket uye seal applications.
1)Buna-N/Nitrile/NBR
Mazwi ese anofanana, iyi yakagadzirwa rubber copolymer ye acrylonitrile (ACN) uye butadiene, kana Nitrile butadiene rubber (NBR), isarudzo yakakurumbira iyo inowanzotsanangurwa kana peturu, mafuta uye/kana magirisi aripo.
Main Properties:
Max Temperature Range kubva ~ -54°C kusvika 121°C (-65° – 250°F).
Yakanaka kwazvo kupikisa mafuta, solvents uye mafuta.
Kuramba kwakanaka kweabrasion, kutonhora kuyerera, kuramba kubvarura.
Inofarirwa kushandiswa neNitrogen kana Helium.
Kusagadzikana kupikisa UV, ozone, uye mamiriro ekunze.
Kusakwanisa kupikisa ketoni uye chlorinated hydrocarbons.
Kazhinji Inoshandiswa mu:
Aerospace & Automotive Fuel Handling Applications
Relative cost:
Yakaderera kusvika Pakati
2)EPDM
Kuumbwa kweEPDM kunotanga ne copolymerization ye ethylene uye propylene. Imwe yechitatu monomer, diene, inowedzerwa kuitira kuti zvinhu zvigone kusvibiswa nesarufa. Mushonga wakakohwa unozivikanwa se ethylene propylene diene monomer (EPDM).
Main Properties:
Max Temperature Range kubva ~ -59°C kusvika 149°C (-75° – 300°F).
Yakanakisa kupisa, ozone uye mamiriro ekunze kuramba.
Kuramba kwakanaka kune polar zvinhu uye steam.
Yakanakisa magetsi insulating properties.
Kuramba kwakanaka kumaketoni, akajairwa diluted acids, uye alkaline.
Kusamira zvakanaka kumafuta, peturu, neparafini.
Kusakwanisa kuramba kune aliphatic hydrocarbons, halogenated solvents, uye concentrated acids.
Kazhinji Inoshandiswa Mu:
Refrigerated/Cold-Room Environments
Yemotokari Kutonhodza System uye Mamiriro Ekunze-Kubvisa Zvikumbiro
Relative cost:
Kudzika – Pakati
3) Neoprene
Mhuri ye neoprene yemarubha ekugadzira inogadzirwa ne polymerization ye chloroprene uye inozivikanwawo se polychloroprene kana Chloroprene (CR).
Main Properties:
Max Temperature Range kubva ~ -57°C kusvika 138°C (-70° – 280°F).
Yakanakisa kukanganisa, abrasion uye inodzivirira murazvo zvivakwa.
Yakanaka kubvarura kuramba uye compression set.
Yakanakisa kudzivirira kwemvura.
Kuramba kwakanaka kuratidzwa zvine mwero kune ozone, UV, uye mamiriro ekunze pamwe nemafuta, magirisi, uye zvinyoro zvinonyungudutsa.
Kusakwanisa kupikisa kune yakasimba acids, solvents, esters, uye ketones.
Kusakwanisa kuramba kune chlorinated, inonhuhwirira, uye nitro-hydrocarbons.
Kazhinji Inoshandiswa Mu:
Aquatic Environment Applications
Electronic
Relative cost:
Low
4) Silicone
Silicone rubbers ndeyepamusoro-polymer vinyl methyl polysiloxanes, yakasarudzwa se (VMQ), inoita zvakanaka kwazvo munzvimbo dzinopisa dzinopisa. Nekuda kwekuchena kwavo, silicone rubber inonyanya kukodzera kune hutsanana application.
Main Properties:
Max Temperature Range kubva ~ -100°C kusvika 250°C (-148° – 482°F).
Excellent high temperature resistance.
Yakanakisa UV, ozone uye nemamiriro ekunze kuramba.
Inoratidza yakanakisa yakaderera tembiricha kuchinjika kwezvinhu zvakanyorwa.
Yakanaka kwazvo dielectric zvivakwa.
Kusasimba kwesimba uye kuramba kubvarura.
Kusagadzikana kunopesana nezvinonyungudutsa, mafuta, uye concentrated acids.
Kusakwanisa kupikisa kupfutidza.
Kazhinji Inoshandiswa Mu:
Chikafu & Chinwiwa Applications
Pharmaceutical Environment Applications (Kunze kwe sterilization)
Relative cost:
Pakati nepakati – High
5) Fluoroelastomer/Viton®
Viton® fluoroelastomers akaiswa pasi pezita rekuti FKM. Iri kirasi yeelastomers imhuri inoumbwa nemacopolymers ehexafluoropropylene (HFP) uye vinylidene fluoride (VDF kana VF2).
Terpolymers ye tetrafluoroethylene (TFE), vinylidene fluoride (VDF) uye hexafluoropropylene (HFP) pamwe neperfluoromethylvinylether (PMVE) ine hunyanzvi inocherechedzwa mumagiredhi epamusoro.
FKM inozivikanwa semhinduro yesarudzo kana tembiricha yakakwira pamwe nekupokana kwemakemikari kunodiwa.
Main Properties:
Max Temperature Range kubva ~ -30°C kusvika 315°C (-20° – 600°F).
Best high temperature resistance.
Yakanakisa UV, ozone uye nemamiriro ekunze kuramba.
Kusagadzikana kunopesana nemaketone, yakaderera molecular weight esters.
Kusagadzikana kunopesana nedoro uye nitro-ine makomisheni
Kusagadzikana kunopesana nekushisa kwakadzika.
Kazhinji Inoshandiswa Mu:
Aquatic / SCUBA Kuisa Chisimbiso Zvishandiso
Yemotokari Yemafuta Yekushandisa ine Yakakwira Concentrations yeBiodiesel
Aerospace Seal Applications muKutsigira Mafuta, Lubricant, uye Hydraulic Systems
Relative cost:
High
Nguva yekutumira: Kubvumbi-15-2020