Eka tifektri to lulamisa swakudya, tifektri ta switirhisiwa swa vutshunguri ni le tindhawini to karhi ta tiindasitiri, ku tirhisiwa miseve ya gamma kumbe miseve ya tielektroni leswaku ku dlayiwa switsongwatsongwana. Loko u lava ku tirhisa Thepi ya mahiselo yale henhla ya PTFE eka tindzhawu leti – kumbe ku biha ngopfu, eka xitirhisiwa xa gezi ra nyutliya – ufanele ku twisisa swipimelo swa yona swo lwisana na radiation.
Nhlamulo yo koma: PTFE yi olova swinene eka miseve ya ionizing. Yitirha kahle eka switirhisiwa swale hansi (kufana na food sterilization) kambe yi tsandzeka hi ndlela ya khombo eka mimpimo yale henhla.
Aokai PTFE yi ringetile tithepi ta PTFE ehansi ka swiyimo swo hambana swa radiation. Xihloko lexi xi hlamusela tindlela to onha, swipimelo swa mpimo, na laha u nga fanelangiki u tirhisa thepi ya PTFE.
Ntiyiso wa Nkoka – PTFE Yina ku Tiyisela ka Radiation lokunene
Xiphemu xa nkoka xa thepi ya mahiselo yale henhla ya PTFE i polytetrafluoroethylene (PTFE). Kuhambana na ku tiya ka yona ka kahle swinene ka mahiselo na tikhemikhali, PTFE yiva na khombo swinene eka ionizing radiation yofana na gamma rays na electron beams.
Hikokwalaho ka yini? Radiation yi herisa swihlanganisi swa carbon-fluorine (CF) na nkolo wa polymer, leswi endlaka leswaku ti molecular chain scission. Nchumu lowu wu hundzuka brittle naswona wu lahlekeriwa hi matimba ya michini.
Nhlamuselo leyi tirhaka: Thepi ya PTFE yi lulamerile ntsena eka tindzhawu letingana mimpimo yale hansi ya radiation. Hi ntolovelo swi yirisiwile eka swiyimo swa high-radiation swofana na ti nuclear reactor cores kumbe ti primary loops.
Ku Onhiwa ka Matirhelo Ehansi ka Radiation – Hi Tinhlayo
Loko yi hlangana na radiation, ti molecular chains ta PTFE ti tshoveka, leswi endlaka leswaku kuva na kuhunguteka lokukulu eka swivumbeko swa michini. Ku cinca loku kongomeke ku kombisiwile laha hansi:
Mpimo wa Radiation
Mbango
Vuyelo eka PTFE
1 kGy (0,1 Mrad) .
Moya
Matimba ya tensile ya hunguteka kuya eka ~25% wa nkoka wosungula
10 kGy
Moya
Ku tshoveka lokukulu; ku pandzeka ka le henhla ka misava ku sungula
100 kGy ya xirhendzevutani
Moya
Ku onhaka lokukulu; thepi yi nga ha tshoveka loko yi khomiwa
1 MGy (1000 wa tikhilogiramu) .
Moya
Ku lahlekeriwa hi ku leha ku fika eka 87% ; ku lahlekeriwa hi matimba ya ku tsana 54% .
Data yo engetela:
Eka xibakabaka lexi nga tirhiki (vacuum, nitrogen kumbe deuterium), ku onhaka ku nonoka kambe swa ha papalateki.
Thermal-radiation coupling (mahiselo yale henhla + radiation) yi hatlisisa ku dyuhala kuya emahlweni.
Aokai PTFE yi tsundzuxa vaxavi leswaku thepi ya hina ya PTFE ya ntolovelo yi fanelekile eka ku sterilization ka swakudya (≤10 kGy) na ku sterilization ka switirhisiwa swa vutshunguri swa xirhendzevutani xin’we (≤50 kGy). Eka mimpimo leyi hlengeletiweke yale henhla ka 100 kGy kumbe swirhendzevutani swotala swa sterilization, hi ringanyeta ku cincela eka polyimide tape.
Swilo Swa Ntivo-mbango Leswi Hatlisisaka Ku Onhaka
Nghenisa
Vuyelo eka PTFE Ehansi ka Radiation
Xibakabaka (oxygen) .
Oxygen yi hatlisisa ku onhaka – ti free radicals ti endla reaction na O2, leswi endlaka leswaku kuva na chain scission yotala
Thermal-radiation coupling effect – ku dyuhala swi hatlisa swinene
Nkahelo
Kutsakama kunga hlohletela surface hydrolysis, leswi nyanyisaka embrittlement
Nkongomiso lowu tirhaka: Loko u fanele ku tirhisa thepi ya PTFE eka ndhawu ya mpimo wa le hansi wa miseve leyi nga na moya, yi cinca nkarhi na nkarhi. Eka vacuum kumbe inert gas, vutomi byi lehisiwa kambe a byi nga pimiwi.
✅ Swi amukeleka – cinca endzhaku ka xirhendzevutani xin’wana na xin’wana ku tirhisiwa hi ndlela ya nkoka
Tindhawu leti nga riki ta nkoka ta tipulani ta nyutliya (xikombiso, ku lulamisiwa ka ku pfaleriwa ka tiphayiphi) .
Mpimo wa le hansi, PTFE leyi cinciweke ya laveka
⚠️ Ntsena loko yi cinciwile hi ndlela yo hlawuleka – standard PTFE a yi bumabumeriwi
Swiendlakalo swa Radiation ya le Henhla leswi faneleke ku Papalata (>100 kGy) .
Xikombelo
Mpimo lowu Hlengeletiweke
Ha Yini PTFE Yi Hluleka
Ndlela Yin’wana Yo Antswa
Xiphemu xa xitirhisiwa xa nyutliya
>1 MGy
Swilo leswi vonakaka swi tshoveka
Polyimide (Kapton) kumbe PEEK
Swiphemu swa xirhendzevutani xa le henhla
100 kGy – 1 MGy
Ku tshoveka lokukulu
Polyimide / XITLHANYI
Xihahampfhuka xa le xibakabakeni ehandle
Radiation ya swiphemuphemu ya eneji ya le henhla
A swi koti ku tiyisela ku hlangana na swona nkarhi wo leha
Polyimide / XITLHANYI
Ku sterilization ka gamma hi mpimo wa le henhla (>100 kGy) .
>100 wa tikhilogiramu
Ku lahlekeriwa hi matimba >80% .
Polyimide ya xirhendzevutani
Nkatsakanyo – Tiva Xipimelo
Xiyimo xa Mpimo wa Radiation
Matirhelo ya Thepi ya PTFE
Xitsundzuxo
< 10 kGy (ku sterileriwa ka swakudya) .
Ku hava ku onhaka loku vonakaka; swivumbeko swa michini ngopfu-ngopfu swi hlayisiwile
✅ Swi hlayisekile ku tirhisiwa
10 – 50 kGy (ku sterileriwa hi swa vutshunguri) .
Ku tshoveka kun’wana; matimba ya tensile ya hungutiwile hi 30-50% .
⚠️ Tirhisa kan'we, kutani u cinca
50 – 100 wa tikhilogiramu
Ku tshoveka lokukulu; ku pandzeka ka le henhla
❌ A swi bumabumeriwi
> 100 wa tikhilogiramu
Swilo leswi vonakaka swi tshoveka; yi humesa tigasi leti onhaka
❌ Swi yirisiwile – tirhisa polyimide kumbe PEEK
Xilotlelo lexi tekiwaka: Ku tiya ka miseve leyi tsaneke i xipimelo lexikulu xa thepi ya mahiselo ya le henhla ya PTFE . Yi faneleka ntsena eka tindzhawu ta radiation ya dose yale hansi (swakudya na sterilization ya swa vutshunguri). Yi tisa ku tiya lokunene ka mahiselo yale henhla xikan’we naku tiya ka ti khemikhali eka swiyimo sweswo. Eka tinsimu letingana miseve yale henhla yofana na ti nuclear reactors kumbe swihahampfhuka swale xibakabakeni, switirhisiwa swa xiphurofexinali leswi lwisanaka na radiation swifanele ku amukeriwa.
Hi ku komisa , thepi ya PTFE a hi nchumu lowu nga ngheniwiki hi miseve ya miseve. Eka 1 kGy ntsena ya gamma exposure, matimba ya yona ya tensile ya hunguteka kuya eka 25% wa original. Yi lulamerile ntsena eka switirhisiwa swa mpimo wale hansi kufana na swakudya na sterilization ya swa vutshunguri (≤50 kGy). Eka mimpimo leyi hlengeletiweke yale henhla ka 100 kGy – kufana na ti nuclear reactor cores, ti primary loops, kumbe ehandle ka xihahampfhuka xale xibakabakeni – PTFE ya yirisiwile.
Loko xikombelo xa wena xi katsa radiation, rhanga hi ku kumisisa mpimo lowu languteriweke lowu hlengeletiweke. Ehansi ka 10 kGy, PTFE tape yi tirha kahle. Exikarhi ka 10-50 kGy, tirhisa kan’we kutani u cinca. Ehenhla ka 50 kGy, cincela eka polyimide kumbe PEEK.
Xana u lava mpfuno wo hlawula thepi leyi faneleke ya ndhawu ya miseve? Aokai PTFE yi nga nyika datha ya xikambelo lexi kongomisiweke eka mpimo na switsundzuxo swin’wana. Tihlanganise na hina hi xihlovo xa wena xa radiation, mpimo lowu languteriweke, na vuxokoxoko bya xikombelo.
Loko u lava ku tiva swo tala hi tipharamitha ta vuxokoxoko, swiyimo swa ku tirhisiwa, na swintshuxo leswi endleriweke layini ya hina ya swikumiwa leswi heleleke, ku katsa na lapi ra mahiselo ya le henhla ya PTFE, thepi ya mahiselo ya le henhla ya PTFE, bandi ra mesh ra mahiselo ya le henhla ya PTFE, bandi ra muchini wo fusa leri nga riki na swirhabyani, lapi ra PTFE ra tlhelo rin’we, bandi ro fambisa leri nga lwisaniki na mahiselo ya le henhla na fiberglass leyi nga tiyangiki hi mahiselo ya le henhla cloth , hi kombela u ntshunxeka ku hi tihlanganisa:
