Aerosol tuaj yeem tawm tswv yim Tetrafuoroethane 134A: siv, hom, thiab nws ua haujlwm li cas

Aerosol cov khoom -}}} los ntawm kev ua kws kho mob tshuab {}}}}}} sib xyaw ua ke: lub aerosol propellant. Cov tshuaj no ua rau lub siab xav tau kom thawb cov khoom (kua, ua npuas ncauj, lossis hmoov) tawm ntawm lub thawv ntim khoom lossis tshuaj tsuag. Ntawm cov ntsiab lus dav tshaj plaws hauv cov kaus poom hauv niaj hnub no yog Tetrafuoroethane 134A (Case} 97-2), tseem hu ua HFC-134A. Nws cov khoom tshwj xeeb ua rau nws xaiv qhov zoo tshaj plaws rau kev nyab xeeb-tseem ceeb thiab cov neeg siv khoom zoo ib yam nkaus. Hauv qab no, peb tawg cia cov proposol twg yog, lub luag haujlwm ntawm TetraToroetoroetoroetoroetoreane 134A, nws siv, thiab nws muab piv rau lwm txoj kev xaiv.

 

Cov kws lij choj AEROSOL yog roj av roj lossis cov kua uas tsis muaj zog uas tsim kom muaj kev ntxhov siab sab hauv ib lub aerosol tuaj yeem propellant system. Thaum lub tau lub valve yog nias, lub siab no rog cov khoom (piv txwv li, cov tshuaj, lossis tshuaj pleev xim, at ua ke rau hauv daim foos siv tau. Propellants yog categorized los ntawm lawv cov tshuaj lom neeg muaj pes tsawg leeg thiab theem coj cwj pwm, nrog plaub lub ntsiab aerosol propellant hom kev ua lag luam:

Compressed gases:Inert gases zoo li cov pa roj carbon dioxide (co₂), nitrogen (n₂), lossis nitrous oxide (n₂o). Cov no nyob twj ywm gaseous nyob rau hauv chav tsev kub thiab cia siab rau kev kub siab (300-1,000 PSI) rau cov khoom lag luam. Lawv muaj ntau yam nyob rau hauv cov khoom lag luam zoo li whipped cream lossis huab cua fresheners tab sis tsis muaj vapor siab xav tau rau kev ua txhaum.

Hydrocarbons (HCS):Cov kua dej ua kua xws li propane, Butane, lossis Isobutane. Lawv vaporize tau yooj yim nyob rau hauv chav tsev kub thiab raug nqi-}}}}}} }amm lim Txwv siv hauv cov ntawv thov ntawm cov ntaub ntawv (piv txwv li, kho mob).

Chlorofluorocarbons (CFCS):Thaum nrov, cov no tau phased tawm thoob plaws hauv qab montreal raws cov kevcai lij choj vim lawv lub luag haujlwm hauv Ozone txheej depetion.

Hydrofluorocarbons (HFCS):Hloov pauv niaj hnub rau CFCS. Tetrafluoroethane 134a ntog rau hauv pawg no-}}} Tus phooj ywg, thiab nrog cov kev siv hluav taws xob zoo rau cov kev siv thev naus laus zis.

Tetrafluoroethane 134A (feem ntau shortened rau 1 1 1 2 tetrosia} Lub neej ntawm kev nyab xeeb, kev ua tau zoo, thiab ib puag ncig ua raws. Ntawm no yog dab tsi ua rau nws tshwj xeeb:

Tsis - nplej:Tsis zoo li hydrocarbon propellants, nws tsis muaj flash point, tshem tawm hluav taws lossis tawg thaum cia, thauj khoom, lossis siv. Qhov no yog qhov tseem ceeb rau cov khoom siv nyob ze Electronics (piv txwv li, roj av plua plav) lossis hauv cov chaw kho mob (piv txwv li, nqus tau).

Xoom ozone depletion muaj peev xwm (ODP):Tsis zoo li CFCS lossis HCFCS (hydrochlorofluorocarbons), HFC-134A muaj tsis muaj chlorine, yog li nws tsis ua kev puas tsuaj ozone txheej. Qhov no ua kom haum nrog cov kev cai thoob ntiaj teb ib puag ncig.

Tswj vapor siab:Nyob rau hauv chav tsev kub, nws muaj li kua {{vapor sib tov sab hauv lub tau, feem ntau 70-90 psi) siv sijhawm. Qhov no ua kom pom tseeb cov qauv tshuaj tsuag - tsis muaj sputtering lossis tsis muaj khoom lag luam.

Tshuaj lom neeg inertness:Nws tsis hnov ​​qab yam nrog cov khoom lag luam feem ntau (piv txwv li, cov tshuaj, plastics, lossis tu cov tshuaj tiv thaiv), khaws cia lub neej ua kom ncaj ncees thiab txee. Piv txwv li, hauv cov tshuaj txau tshuaj, nws yuav tsis tawg cov khoom xyaw ua ke xws li Albuterol.

Lub luag haujlwm ntawm TetraToroetoroethane 134A hinges ntawm nws theem hloov pauv khoom. Ntawm no yog ib kauj ruam - - kauj ruam} sib tawg ntawm nws cov iterosol propellant Mechanism:

Tuaj yeem sau: ib qho AEROSOL tuaj yeem ua ntej tau sau nrog cov khoom lag luam (piv txwv li, cov tshuaj noj ua kua lossis ntxuav cov tshuaj). Tetrafuoroethane 134A yog tom qab ntawd ntxiv rau hauv siab {{4 {}} txaus kom muaj roj rau hauv cov kua. Sab hauv lub kaw tuaj yeem, ib daim foos sib npaug: qee cov kua 134A vaporizes rau hauv cov roj, tsim kev ntxhov siab uas luam tawm cov khoom.

Valve ua kom muaj: thaum tus neeg siv nias lub peev xwm lub valve, lub foob tawg, thiab lub siab sab hauv tee. Qhov no cuam tshuam cov kua - vapor 134a rau cov kua 134A kom sov sai (rhaub) yog -26.3 Qib F).

Cov khoom lag luam: Lub vaporizing 134a tsim lub siab- Cov roj av loj uas thawb cov khoom lag luam uas tau tso tseg thiab tawm ntawm lub nozzle. Raws li cov khoom tawm, nws sib xyaw nrog 134A roj, tawg rau hauv cov tee dej me me (atomization) rau kev pab them nqi.

Kev ua tau zoo ib yam: raws li cov neeg tuaj yeem, cov kua ua kua 134a tseem ua kom muaj kev ruaj ntseg kom txog thaum ze txhua yam khoom yog discensed. Qhov no zam lub "tshuaj tsuag tsis muaj zog" teeb meem nrog rau cov processed roj teeb.

Tetrafluoroethane 134A cov versatility ua rau nws staple hauv Aerosol cov kws tshaj lij siv thoob plaws cov neeg siv khoom, 医药, thiab cov haujlwm. Hauv qab no yog cov Aerosol cov kws lij choj ua piv txwv uas muaj cov kab ke no:

1. Nqus tshuaj (MDIS)

Metered -} Koob tshuaj (MDIS) rau mob hawb pob (COPD, lossis kev ua xua rau ntawm TetraToroethane 134A xa cov tshuaj kho mob. Lub tswv yim tsis yog - reactivity ua kom cov tshuaj (piv txwv li nws cov tshuaj tiv thaiv txhua lub zog (feem ntau 50-100 mcg). Rau cov neeg mob, qhov no txhais tau tias kev kho kom tau kev kho kom zoo- Tsis muaj nyob rau hauv {{10} {{} dosing.

2. Cov Neeg Siv Khoom thiab Hluav Taws Xob Cov Khoom Ntxuav

"Cov roj av plua plav" (feem ntau hu ua huab cua hauv kaus poom Nws tsis -} {{{kua dej muaj kev nyab xeeb rau cov khoom siv hluav taws xob tawm ntawm cov khoom siv hluav taws xob yoojyim tsis muaj chaw nyob. Nws kuj tseem siv nyob rau hauv cov cawv rawg Cork Duaj: Tus ntxig lub siab thawb lub koob rau hauv lub cork, tso roj tso kom xoob nws yam tsis muaj lub raj mis.

3. Kev lag luam thiab tshuaj tsuag tshwj xeeb​

Hauv chaw muaj kev muaj, nws tau siv los ua cov lus sib txuas rau qis - voc (xws li xws li lubricants, xws li anti- corrosion txau. Nws inertness tiv thaiv cov tshuaj lom neeg nrog hlau chaw, thiab nws cov yeeb yaj kiab zoo kom muaj kev thov. Nws tseem pom hauv cov tshuaj pleev ib ce (piv txwv li, chaw tshuaj tsuag) qhov twg tsis {} Cov tawv nqaij thiab tawv nqaij {}} Cov tawv nqaij muaj kev nyab xeeb.

Thaum Tetrafluoroethan 134A yog ozone-}} Tus phooj ywg sov, nws muaj qhov kub ntxhov hauv ntiaj teb (GWP): Qhov no tau coj los tswj cov tshuaj ntsuam xyuas:

EU lub f - cov roj kev txwv HFC siv hauv Aerosols, thawb cov khoom lag luam zoo li HFO-1234YF (GWP {}) lossis cua compressed.

Hauv Asmeskas, EPA tus txheej txheem xaiv tshiab (SNAP) kom hloov hfc {}} 134a nrog cov ntawv thov uas tsis tseem ceeb.

Txawm li cas los xij, TetraThane 134A tseem tseem ceeb nyob rau hauv cov pa nqus tau zoo {}} Tsis muaj kev xaiv tsis tau muaj qhov yuam kev. Kev tswj hwm lub cev (piv txwv li, FDA) tau tso cai zam rau kev siv kho mob, paub txog nws lub luag haujlwm hauv kev saib xyuas neeg mob.

Tetrafluoroethane 134AYog lub hauv paus ntawm cov neeg aerosol niaj hnub tuaj yeem propellant technology, kev sib tham, kev nyab xeeb, thiab ib puag ncig ua raws. Raws li cov Aerosol cov roj av, nws txawj nyob hauv kev kho mob, khoom siv hluav taws xob, thiab cov chaw muaj kev kho lwm yam zoo li cov roj av lossis cov roj teeb hluav taws xob. Thaum tswj cov kev ntsuas yog tsav tsheb rau qis- kev hloov chaw, nws lub neej nyob rau hauv kev nqus tau pa) kom nws yuav nyob nrog rau xyoo tom ntej. Rau cov neeg siv khoom thiab kev lag luam sib txawv, nkag siab tias nws muaj nuj nqi thiab cov txiaj ntsig yog qhov tseem ceeb los xaiv cov khoom lag luam zoo, muaj kev nyab xeeb Aerosol cov khoom lag luam.

Rau kev lag luam nrhiav Tetrafuoroethane 134A, peb lub tuam txhab muab cov nqi sib tw, txhim khu kev qha ntawv, thiab kev txhawb nqa. Tiv tauj peb hnub no rau Tetrafluoroethanetoroethane roj nqe!

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