Uma kuziwa ekukhetheni impahla efanele yephrojekthi yakho, kubalulekile ukucabangela izakhiwo zenketho ngayinye. Kulokhu okuthunyelwe kwebhulogi, sizoqhathanisa izakhiwo zenjoloba ye-silicone ne-Ethylene-Propylene Diene Monomer (EPDM) ukuze sikusize unqume ukuthi iyiphi inketho ekulungele wena.
Iyini irabha ye-silicone ne-EPDM?
Irabha ye-Silicone kanye ne-EPDM (i-ethylene propylene diene monomer) yizinhlobo ezimbili zenjoloba ezaziwa kakhulu. Zombili zinezinhlobonhlobo zezinhlelo zokusebenza, kodwa kukhona umehluko omkhulu phakathi kwazo.
Irabha ye-Silicone ne-EPDM yizinhlobo ezimbili zenjoloba yokwenziwa. Zombili zenziwe ngemikhiqizo ye-petroleum futhi zinezicelo eziningi embonini nasekukhiqizeni. Irabha ye-Silicone yaziwa ngokumelana nokushisa nokuvumelana nezimo, kuyilapho i-EPDM yaziwa ngokumelana nesimo sezulu kanye nokuqina. Zombili izinto ezisetshenziswayo zisetshenziswa kakhulu embonini yezokwakha, njengolwelwesi lokufulela, i-flooring kanye nesembozo saphansi. Banokumelana okuhle kakhulu kwamanzi namakhemikhali, ngakho-ke bavame ukusetshenziselwa izinhlelo zokusebenza ezihlukahlukene.
IYINI IRHABU YE-SILICONE?
Irabha ye-Silicone iyirabha yokwenziwa eyenziwe nge-silicon, umoya-mpilo, namanye amakhemikhali. Iyakwazi ukumelana nokushisa futhi inebanga lokushisa elibanzi, okuyenza ifanelekele izinhlelo zokusebenza lapho amanye amarabha angaphuka khona. Irabha ye-silicone nayo inezindawo ezinhle zokuvikela ugesi futhi imelana namanzi namakhemikhali. Le rabha yaziwa ngokumelana namazinga okushisa aphezulu kanye nokuguquguquka kwayo. Ingasetshenziswa ezinhlelweni ezahlukahlukene, kufaka phakathi ukufakwa kukagesi, izingxenye zezimoto, i-cookware, namadivayisi wezokwelapha. Irabha ye-Silicone iyi-elastomer ekwazi ukumelana nokushaqeka okushisayo ekwazi ukumelana namazinga okushisa aphezulu. Ingasetshenziswa ezinhlelweni ezidinga ukumelana namakhemikhali namanzi, njengokupakishwa kokudla. Iphinde ibe nezindawo ezinhle kakhulu zokumelana nemihuzuko kanye nezindawo zokuvikela ugesi, okuyenza ilungele ukusetshenziswa ekufakeni ugesi.
IYINI I-EPDM?
I-EPDM iyirabha yokwenziwa enikeza ukumelana okuhle ne-ozone, ukukhanya kwelanga kanye nesimo sezulu. Futhi inokumelana okuhle namakhemikhali futhi ingamelana namazinga okushisa aphakeme. I-EPDM ijwayele ukusetshenziswa ekufakeni uphahla, kodwa futhi ingatholakala kuma-gaskets, seal kanye namapayipi. I-EPDM inefomula yamakhemikhali ethi CH2=CH(CH3)2, futhi izinga lokushisa elincibilikayo licishe libe ngu-40°C. Izingxenye eziyinhloko ze-EPDM yi-dimethylpentadiene ne-dimethylisoprene. I-Dimethylisoprene iyingxenye ebaluleke kakhulu futhi inikeza i-EPDM ukumelana kwayo ne-ozone, ukukhanya kwelanga, isimo sezulu kanye namazinga okushisa abandayo.
Uyini umehluko omkhulu phakathi kwerabha ye-silicone ne-EPDM?
Kunezinhlobo eziningi zenjoloba, ngayinye enezici zayo ezihlukile. Izinhlobo ezimbili zenjoloba ezivame kakhulu irabha ye-silicone ne-Ethylene Propylene Diene Monomer (EPDM) irabha. Nakuba zombili izinto ezisetshenziswayo zingama-elastomer (okungukuthi, zingabuyela esimweni sazo sangempela ngemva kokunwetshwa noma ukucindezelwa), zinokuhluka okubalulekile okuningana.
I-rubber ye-rubber i-synthetic material eyenziwe nge-silicone, i-siloxane (i-molecule equkethe i-silicon nama-athomu omoya-mpilo). Amarabha e-Silicone amelana nokushisa okuphezulu futhi anezindawo ezinhle zokuvikela ugesi. Zivame ukusetshenziswa lapho lezi zakhiwo zidingeka khona, njengalapho kufakwe amandla kagesi aphezulu, ama-gasket kanye nama-seal ezinjini neminye imishini, izitsha zokupheka, nezigxivizo zezokwelapha.
Ijubane le-EPDM iphinde ibe yinto yokwenziwa, eyenziwe nge-copolymer ye-ethylene kanye ne-synthetic diene (inhlanganisela equkethe ama-athomu amabili ekhabhoni). Amarabha e-EPDM anokumelana okuhle nokushisa, isimo sezulu, namakhemikhali. Avame ukusetshenziswa ezinhlelweni zangaphandle ezifana nezigxivizo eminyango yemoto namafasitela, amapayipi, amashubhu, kanye nokufakwa kwezintambo.
Kukhona omunye umehluko obalulekile phakathi kwerabha ye-silicone nerabha ye-EPDM. Amarabha e-Silicone anokumelana nezinyembezi okumpofu kunama-rubber e-EPDM; kodwa-ke, banokuphikiswa okungcono kwesethi yokucindezelwa (okungukuthi, bagcina umumo wabo kangcono uma becindezelwe ngokuhamba kwesikhathi). Amarabha e-Silicone nawo ane-density ephansi kunama-rubber e-EPDM; nokho, zinamandla okushisa athile aphezulu (okungukuthi, zingamunca ukushisa okwengeziwe ngaphambi kokuba zishise ngokwazo).
Irabha ye-Silicone ne-EPDM kokubili kuyizinto eziguquguqukayo ezinezinhlelo zokusebenza ezihlukahlukene. Womabili angama-elastomer, okusho ukuthi anamandla okubuyela esimweni sawo sangempela ngemuva kokunwetshwa noma ukucindezelwa. Nokho, kukhona umehluko omkhulu phakathi kwalezi zinto ezimbili.
Irabha ye-Silicone kanye ne-EPDM Umehluko ezindaweni: ukuguquguquka, ukumelana nokushisa, ukumelana namakhemikhali
Irabha ye-Silicone ne-EPDM yizinhlobo ezimbili zenjoloba yokwenziwa. Zombili zisetshenziswa ezinhlobonhlobo zezinhlelo zokusebenza, kepha kukhona umehluko obalulekile phakathi kwalokhu okubili. Irabha ye-Silicone ivumelana nezimo futhi inokumelana nokushisa okungcono kune-EPDM. Irabha ye-silicone inebanga lokushisa eliphakeme kakhulu kune-EPDM. Irabha ye-Silicone ingasetshenziswa emazingeni okushisa afinyelela ku-400 degrees Fahrenheit, kuyilapho i-EPDM iqala ukuwohloka cishe ku-200 degrees Fahrenheit. Lokhu kwenza irabha ye-silicone ibe ukukhetha okungcono kwezinhlelo zokusebenza lapho amazinga okushisa aphezulu ebandakanyeka. Iphinde imelane kancane namakhemikhali nemisebe ye-UV. Lokhu kwenza kube ukukhetha okuhle kwezinhlelo zokusebenza lapho izohlangana khona namakhemikhali anokhahlo noma izincibilikisi. Irabha ye-Silicone nayo ikhombisa ukumelana nowoyela namafutha, okwenza kube ukukhetha okuhle kwezinhlelo zokusebenza lapho ukungcola nemfucumfucu kukhathazeka khona. Iphinde imelane nama-asidi, ama-alkali, ne-chlorine. Irabha ye-Silicone inokunamathela okungcono, ngisho nasezindaweni ezihlukahlukene, kuhlanganise nezinsimbi, ingilazi kanye ne-ceramic. Iphinde ibe ne-hysteresis ephansi.
Irabha ye-Silicone kanye nomehluko we-EPDM ku-Weathering
Isimo sezulu inqubo yokudiliza nokuguqula izinto ngokusebenza komoya, amanzi, iqhwa, nezinye izimo zomkhathi. Isimo sezulu singaba inkinga ezintweni eziningi ezahlukene, kodwa ikakhulukazi inkinga yerabha ye-silicone ne-EPDM. Lezi zinto ezimbili zivame ukusetshenziswa ekusetshenzisweni lapho ukumelana nesimo sezulu kubalulekile, ngakho-ke kubalulekile ukuqonda umehluko phakathi kwazo.
Irabha ye-Silicone inokumelana nesimo sezulu esihle kakhulu ngenxa yesakhiwo sayo samakhemikhali esiyingqayizivele. Iketango eliyinhloko le-polymer lakhiwe i-silicon nama-athomu omoya-mpilo, anama-athomu e-carbon ambalwa uma kuqhathaniswa. Lokhu kwenza impahla imelane ne-oxidation kanye nokuwohloka kwe-UV. Ngaphezu kwalokho, irabha ye-silicone ayimumbi amanzi, ngakho-ke ayithinteki umswakama noma imvula.
I-EPDM nayo inokumelana nesimo sezulu esihle, kodwa ngezizathu ezahlukene.
I-Ethylene propylene diene monomer, noma i-EPDM, iwuhlobo lwerabha yokwenziwa. Isetshenziswa ezinhlobonhlobo zezinhlelo zokusebenza, njengakuma-seal namapayipi. I-EPDM inokumelana nesimo sezulu esihle, kodwa ngezizathu ezihlukile kunezinye izinhlobo zenjoloba.
I-EPDM imelana nakho kokubili ukukhanya kwe-ultraviolet ne-ozone. Lezi zakhiwo zikwenza kube kuhle ezinhlelweni zokusebenza zangaphandle. Ezinye izinhlobo zenjoloba, njengenjoloba yemvelo, azikwazi ukumelana nalezi zakhi futhi zizolulazeka ngokuhamba kwesikhathi.
I-EPDM futhi inokumelana okuhle kwamakhemikhali. Akuthintwa ama-acids noma ama-alkali. Lokhu kuyenza ilungele ukusetshenziswa ezindaweni lapho ezinye izinto zingagqwala ngamakhemikhali akhona.
Sekukonke, i-EPDM iwumsebenzi oguquguqukayo ongasetshenziswa ezinhlelweni eziningi ngenxa yesimo sezulu esingcono kakhulu nokumelana namakhemikhali.
Irabha ye-Silicone kanye Nomehluko we-EPDM Ezindlekweni
Irabha ye-Silicone ibiza kakhulu kunerabha ye-EPDM ngoba kuthatha isikhathi namandla amaningi ukukhiqiza.
Yiziphi ukusetshenziswa kwerabha ye-silicone ne-EPDM?
Kokubili irabha ye-silicone ne-EPDM isetshenziswa ezinhlelweni ezihlukahlukene, njengezigxivizo nama-gaskets, ukufakwa kukagesi, nanjenge-coating yezindwangu.
Irabha ye-Silicone ivame ukusetshenziswa ekucubunguleni ukudla nasekusetshenzisweni kwezokwelapha ngenxa yokumelana kwayo okuphezulu nezinga lokushisa namakhemikhali. Iphinde isetshenziswe ezinhlelweni lapho amazinga aphansi okukhishwa kwe-volatile organic compound (VOC) edingeka.
I-EPDM inokumelana okuhle kakhulu nokukhanya kwe-UV, okuyenza ibe ukukhetha okudumile ezinhlelweni zangaphandle ezifana nokufulela nezingxenye zezimoto. Ibuye isetshenziswe kaningi ekufakweni kwamanzi ashisayo ngenxa yokumelana nokuwohloka emazingeni okushisa aphezulu.
Yiziphi izinzuzo kanye nokubi kwerabha abicah kanye EPDM?
Kokubili irabha ye-silicone ne-EPDM zingama-elastomer, okusho ukuthi zombili ziyakwazi ukuguquguquka futhi zinobubanzi obufanayo bezinhlelo zokusebenza. Ngakho, yiziphi izinzuzo nezingozi zendaba ngayinye?
Irabha ye-Silicone yaziwa ngokumelana namazinga okushisa aphezulu, okuyenza ilungele ukusetshenziswa lapho ukushisa kuyisici. Futhi inokumelana okuhle ne-ozone, ukukhanya kwe-UV, kanye nesimo sezulu ngokujwayelekile, okuyenza ilungele ukusetshenziswa kwangaphandle. Kodwa-ke, irabha ye-silicone inezinkinga ezithile. Ayinamandla njengerabha ye-EPDM futhi ingadabula kalula. Iphinde ibize kakhulu kunerabha ye-EPDM.
Irabha ye-EPDM yaziwa ngokumelana kwayo okuhle kakhulu namakhemikhali ne-ozone. Iphinde imelane ne-UV futhi inezindawo ezinhle zesimo sezulu ngokujwayelekile. Enye inzuzo i-EPDM enayo ngaphezu kwerabha ye-silicone ukuthi ishibhile. Kodwa-ke, i-EPDM ayimelani nokushisa njengerabha ye-silicone futhi ingaphuka emazingeni okushisa aphezulu.
I-silicone irabha ne-EPDM iqhathaniswa kanjani ngokwezindleko?
Ayikho impendulo elula uma kuziwa ekuqhathaniseni izindleko ze-silicone rubber vs EPDM. Zombili izinto zokwakha zinezinhlobonhlobo zamanani, kuye ngekhwalithi kanye nenani lomkhiqizo. Ngokuvamile, irabha ye-silicone ibiza kakhulu kune-EPDM, kodwa kunezici eziningi ezingathinta intengo yanoma iyiphi into.
Kubalulekile ukuqaphela ukuthi izindleko akuyona into kuphela okufanele icatshangelwe lapho ukhetha impahla. Ukufaneleka kwempahla yohlelo oluthile kufanele kube ukucatshangelwa okuyinhloko. Sekushiwo lokho, ake sibhekisise ukuqhathanisa izindleko zerabha ye-silicone vs EPDM.
Irabha ye-Silicone ngokuvamile ibiza kakhulu kunerabha ye-EPDM ngoba inenani lezinzuzo kune-EPDM. Okokuqala, irabha ye-silicone inebanga lokushisa eliphakeme kakhulu eliphakeme kune-EPDM (-55°C kuya ku-+300°C uma kuqhathaniswa no -40°C kuya +125°C ku-EPDM). Okwesibili, amarabha e-silicone nawo anokumelana okukhulu ne-ozone nokukhanya kwe-UV, okuwenza alungele ukusetshenziswa kwangaphandle. Okokugcina, amarabha e-silicone anezakhiwo ezinhle kakhulu zokuvala ugesi, okuwenza alungele ukusetshenziswa ezinhlelweni zikagesi.
Ububi obukhulu berabha ye-silicone amandla ayo okudabula aphansi uma kuqhathaniswa ne-EPDM. Lokhu kusho ukuthi imikhiqizo yenjoloba ye-silicone kungenzeka ukuthi idabuke noma yonakale ngokuhamba kwesikhathi kunemikhiqizo ye-EPDM.
Irabha ye-EPDM ibiza kancane kunerabha ye-silicone ngoba ayinazo izinzuzo eziningi njengerabha ye-silicone. Kodwa-ke, i-EPDM inezinzuzo ezithile ngaphezu kwerabha ye-silicone. Okokuqala, i-EPDM inebanga lokushisa eliphansi kakhulu eliphansi kunerabha ye-silicone (-40°C uma kuqhathaniswa no -55°C). Okwesibili, amarabha e-EPDM nawo anokumelana kwamakhemikhali okungcono kune-silicon rubber (yize zombili izinto ezisetshenziswayo zimelana namakhemikhali amaningi). Okokugcina, nakuba amarabha e-EPDM engenazo izinto ezinhle zokuhlanganisa ugesi njenge-assilicone rubber, asafaneleka ukusetshenziswa ezinhlelweni eziningi zikagesi.
Iyiphi impahla elungele kangcono izinhlelo zokusebenza ezithile - irabha ye-silicone noma i-EPDM?
Kuyinkulumo-mpikiswano evamile embonini yenjoloba - iyiphi impahla efaneleka kangcono izinhlelo zokusebenza ezithile, irabha ye-silicone noma i-EPDM? Lesi sihloko sokuqhathanisa sibheka izinzuzo kanye nezithiyo zento ngayinye ukuze ikusize wenze isinqumo unolwazi.
Irabha ye-Silicone wuhlobo lwe-elastomer yokwenziwa enikeza ukumelana okuphakeme namazinga okushisa aphezulu. Iphinde imelane nokukhanya kwe-UV, i-ozone, nomswakama, okuyenza ibe inketho ekahle ezinhlelweni zokusebenza zangaphandle.
I-EPDM enye i-elastomer yokwenziwa eyabelana ngezinto eziningi ezifanayo njengerabha ye-silicone. Kodwa-ke, i-EPDM iphinde imelane nama-alkali nama-asidi, okwenza kube ukukhetha okungcono lapho lezi zinto zikhona.
I-silicone irabha ne-EPDM iqhathaniswa kanjani ngokusimama?
Kunezici ezimbalwa okufanele zicatshangelwe uma uqhathanisa irabha ye-silicone ne-EPDM ngokusimama. Umehluko owodwa oyinhloko ukuthi irabha ye-silicone yenziwe ngesisetshenziswa esivuselelekayo, kuyilapho i-EPDM yenziwe nge-petroleum. Irabha ye-silicone nayo inokuphila okude kakhulu kune-EPDM, okusho ukuthi izokhipha imfucuza encane ngokuhamba kwesikhathi. Ukwengeza, irabha ye-silicone ingasetshenziswa kabusha, kuyilapho i-EPDM ingakwazi.
Ngokuphathelene nomthelela wemvelo, irabha ye-silicone ine-carbon footprint ephansi kune-EPDM. Irabha ye-Silicone nayo ayinawo ama-halogen noma amanye amakhemikhali angaba yingozi emvelweni.
Okokugcina, kufanelekile ukucabangela imithelela yezempilo nokuphepha yakho kokubili okubalulekile. Irabha ye-Silicone ayikhiphi igesi noma amakhemikhali avuzayo, okuyenza ibe ukukhetha okuphephile ukusetshenziswa emikhiqizweni ehlangana nokudla noma isikhumba.
Yiziphi izici ezibalulekile lapho ukhetha phakathi kwerabha ye-silicone ne-EPDM?
Kunokucatshangelwa okuningana okubalulekile lapho ukhetha phakathi kwerabha ye-silicone ne-EPDM (ethylene propylene diene terpolymer) yohlelo lokusebenza. Lokhu kucatshangelwa kufaka ukumelana namazinga okushisa aphezulu, ukumelana namakhemikhali, ukumelana ne-UV, kanye nokuvumelana nezimo.
Irabha ye-Silicone iyakwazi ukumelana namazinga okushisa aphezulu kune-EPDM, okuyenza ibe ukukhetha okungcono ezinhlelweni ezizochayeka ekushiseni. Ukwengeza, irabha ye-silicone inokumelana okungcono kwe-UV futhi ivumelana nezimo kune-EPDM. Kodwa-ke, i-EPDM inokumelana kangcono namakhemikhali futhi ayidingi ukunakekelwa okuningi njengerabha ye-silicone.
