Ku Cinca ka Xivumbeko xa Lapi ra PTFE ra Mahiselo ya le Henhla Ehansi ka Swiyimo swa Mahiselo ya le Henhla

Lapi ra mahiselo yale henhla ya PTFE i xivumbeko xa PTFE coating na fiberglass substrate. Loko yi langutane na mahiselo lawa ya tlakukaka, nchumu lowu awu 'melt' ntsena eka nkarhi wun’we – wu hundza eka nxaxamelo wa ku cinca loku yaka emahlweni ka physical na ti khemikhali eka mune wa ti temperature ranges to hambana.

Kusuka eka micro-cracking eka 260°C kuya eka ku bola loku heleleke eka 500°C+, ku cinca ka xivumbeko ku khumba PTFE coating kusungula, kutani fiberglass substrate. Ku twisisa switeji leswi i swa nkoka eka matirhelo lama hlayisekeke no tshembeka.

Aokai PTFE yi kambisisile mahanyelo ya mahiselo ya malapi lawa ya pfanganisiweke na PTFE eka tindzhawu hinkwato ta mahiselo. Nkongomiso lowu wu hlamusela switeji swa mune swa nkoka swa ku cinca ka xivumbeko naswona wu nyika swipimelo swa mahiselo leswi tirhaka.

Ndzhawu ya Mahiselo ya Vukorhokeri bya Nkarhi woleha – Ehansi ka Kwalomu ka 260°C

Xivumbeko hinkwaxo xitshama xitshamisekile swinene loko ku cinca hiku nonoka, ka microscopic ku humelela hakatsongotsongo.

1. Ku olovisiwa ka tikhetane ta timolekhuli ta PTFE na ku lulamisiwa ka crystallinity

Ku hlangana na mahiselo ya nkarhi woleha swi hlohletela ku famba famba hakatsongotsongo ka ti polymer molecular chains naswona swi tlakusa nyana crystallinity. Xisweswo xifunengeto xi hundzuka xiri brittle nyana hiku tlakuka ka ku tiya ka le henhla. Leri i endlelo ro nonoka – leri pimiwaka endzhaku ka madzana kumbe magidi ya tiawara.

2. Ku hlengeletiwa ka ntshikelelo wa mahiselo ya le xikarhi

PTFE yi na thermal-expansion coefficient ya kwalomu ka 10×10−5/°C , leyi tlakukeke swinene kutlula fiberglass kwalomu ka 5×10−6/°C . Ku phindha-phindha ku rhendzeleka ka thermal-cold swi humesa ntshikelelo wa le ndzeni eka ndzilakano wa coating-substrate, eku heteleleni swi endla ti micro-cracks hi ku famba ka nkarhi. Leyi i endlelo rosungula ro dyuhala endzeni ka ndzhawu leyi hlayisekeke yo tirha.

3. Ku khuluka ka swiengeteri leswi saleke

Ti surfactants letinga sala na ti wetting agents letinga sala eka vuhumelerisi ti bola hakatsongotsongo, leswi endlaka leswaku kuva na munyama lowuntsongo eka vuandlalo bya lapi. Leswi hi ntolovelo aswi na khombo kambe swikomba leswaku nchumu lowu wa dyuhala.

Mahiselo lawa ya tshinelaka no tlula mpimo wa Melting Point – Kwalomu ka 327°C

Loko PTFE yifika eka mahiselo ya yona ya melting-point, ku cinca lokukulu ka physical-structural ku humelela.

1. Ku n’oka ka crystalline-region

Semi-crystalline opaque milky-white PTFE yi hundzuka mati yo fana na gel lama nga riki na xivumbeko lama fambisanaka na ku andzisiwa ka vholumo leyi tlhavaka . Xifunengeto lexi xi lahlekeriwa hi matimba hinkwawo ya michini naswona xi sungula ku olova ni ku khuluka. Eka nkarhi lowu, lapi ri lahlekeriwa hi ku tiya ka rona ka dimensional na vutshembeki bya xivumbeko.

2. Delamination exikarhi ka coating na substrate

Kuhunguteka ka matimba yo hlangana xikan’we na ntshikelelo lowu vangiwaka hi thermal-expansion swiendla leswaku PTFE leyi n’okiweke yiva na swirhumbana, yi rhurhumela, naswona yi khuluka kusuka eka lapi ra fiberglass, leswi endlaka leswaku kuva na composite delamination xikan’we naku tsandzeka ka xivumbeko. Xiphemu lexi nga namarheliki xi onhaka hikwalaho ka sweswo. Loko delamination yi humelerile, a yi hundzuki.

3. Fiberglass yi hlayisa xivumbeko xa yona xa marhambu

Lapi ra fiberglass ritshama riri na dimensionally stable eka xiyimo lexi. Handle ka leyara ya PTFE leyi sirhelelaka, ti bare glass filaments tiva ekhombyeni ra oxidation xikan’we na erosion ya ti khemikhali.

Xilemukiso xa Aokai PTFE: Hambi kuri maendzo yo koma yale henhla ka 327°C yavanga delamination leyinga hundzukiki. Lapi ri nga ha languteka ri nga onhakanga loko ri kufumela, kambe xifunengeto xa PTFE xi hambanile hi laha ku nga heriki na fiberglass, xi lahlekeriwa hi vutshembeki hinkwabyo bya michini.

Kusungula ka Thermal Decomposition – 400°C kuya eka 500°C

Ti molecular backbones ta PTFE ti sungula ku hambanisiwa ka tikhemikhali, leswi tisaka ku tshoveka ka xivumbeko loku nga hundzukiki.

1. Ku angula ka depolymerization loku lawulaka

Ehansi ka tindhawu leti nga riki na okisijini, PTFE yi hundza eka ku onhaka ka muxaka wa zipper . CC covalent bonds eka chain leyikulu ya tshoveka, yi humesa ti gaseous monomers ngopfu ngopfu leti vumbiwaka hi tetrafluoroethylene (ku tlula 95%) na hexafluoropropylene. Ndzilo wa molekhuli wu hunguteka swinene, naswona xifunengeto xa PTFE xa pfotlosa naswona xa hangalaka.

2. Ku bola ka oxidative ehansi ka swiyimo swa aerobic

Oxygen yi hlasela ti carbon free radicals naswona yi humesa tigasi letingana chefu tofana na carbonyl fluoride (COF2) na trifluoromethane, leswi fambisanaka na nun’hwelo wo kariha wo bava wo tshwuka. Hydrogen fluoride (HF) na perfluoroisobutylene (PFIB) na swona swinga humesiwa ehansi ka swiyimo swokarhi.

3. Landzelela masalela ya khaboni

Pure PTFE yi vaporizes kwalomu ka hiku hetiseka handle ka masalela ya carbon. Ku cinca ka muhlovo wa ntima eka lapi hi ntolovelo swi huma eka carbonization ya ti fiberglass sizing agents, swilo leswi thyakeke ehenhla, kumbe ti comonomers letintsongo eka modified-grade PTFE.

4. Ku hisiwa ka switirhisiwa swo pima vukulu bya fiberglass

Ti organic sizing agents leti pfanganisiweke eka ti fiberglass filaments ti bola ehenhla ka 350°C. Ti filaments ta nghilazi ti lahlekeriwa hi ku namarhelana, leswi endlaka leswaku lapi ri va na swirhumbana naswona ri tala ku fuzzing.

(配图4插入位置:本节末尾,展示PTFE在400°C以上分解后仅剩碳化残留物和裸露玻纤的照片

Caption: Lapi ra PTFE endzhaku ka 450°C – coating yi bola hiku hetiseka, yi sala ntsena masalela ya carbonized xikan’we na fiberglass leyi nga erivaleni, yo tsindziyela.

Ndzhawu yo onha ya mahiselo yale henhla – Ehenhla ka 500°C

Ku pfariwa ka PTFE ku nyamalarile hi ku helela, ku sala ntsena substrate ya fiberglass leyi nga ambalangiki nchumu leyi rhwalelaka ndzhwalo lowu yaka emahlweni wa mahiselo ya le henhla.

1. Ku olovisa ka fibre ya E-glass

Fibre ya E-glass leyi tolovelekeke yina ndzhawu yo olova ya kwalomu ka 840°C . Hambi swiritano, matimba ya yona yo tsana ya hunguteka swinene ehenhla ka 500°C. Loko ri hisiwa ku tlula 800°C, lapi hinkwaro ra fiberglass ra olova, ra onhaka naswona ra hunguteka naswona ri lahlekeriwa hi vuswikoti byo seketela xivumbeko.

2. Creep ya mahiselo yale henhla na devitrification

Ku tshama nkarhi woleha eka mahiselo yale henhla swi hlohletela creep-stretching ya ti fibre ta nghilazi, leswi landzeriwaka hi devitrification na pulverization leswi wisa xivumbeko xa lapi hiku hetiseka. Eka xiyimo lexi, lapi leri ari ha tiviwi tani hi xiambalo – ri hundzuka nhlayo leyi ntshunxekeke, leyi nga tiyangiki ya ti fibre ta nghilazi.

Nkatsakanyo – Switeji swa Mahiselo na Swipimelo swa Nkoka

Aokai PTFE yi ringanyeta ku lawula swinene mahiselo ya nkarhi woleha ya ntirho ehansi ka 260°C xikan’we naku ringanyeta tinhlohlorhi ta nkarhi woleha kuya eka 300°C maximum ku papalata ku tsandzeka ka matirhelo xikan’we na makhombo lawa yanga vaka kona ya vuhlayiseki lawa ya vangiwaka hi delamination na thermal decomposition.

Vuxokoxoko bya xithekiniki lebyi boxiweke laha henhla byi nyikiwa hi Jiangsu Aokai Switirhisiwa Leswintshwa Thekinoloji Co., Ltd.

Loko u lava ku kuma vuxokoxoko bya tipharamitha ta xithekiniki, swiyimo swa xikombelo na swintshuxo leswi endleriweke photifoliyo ya hina ya swikumiwa swa nxaxamelo lowu heleleke, ku katsa na lapi ra mahiselo ya le henhla ya PTFE, thepi yo namarhela ya mahiselo ya le henhla ya PTFE, bandi ra mesh ra mahiselo ya le henhla ya PTFE, bandi ra mesh leri nga na swirhabyani, lapi ra PTFE ra tlhelo rin’we, bandi ra conveyor leri tiyiselaka mahiselo ya le henhla na ku tiyisela ku hisa lapi ra fiberglass, hi kombela u hi fikelela hi vuxokoxoko bya vuhlanganisi lebyi nga laha hansi:

• Nkulukumba Guo: +86 18944819998

• Nkulukumba Liu: +86 13705266308

Hi seketela vutshila na vutshembeki tanihi filosofi ya hina ya nkoka ya bindzu, hi tinyiketerile ku nyika swintshuxo swa tiindasitiri swa xiyimo xin’we na vukorhokeri lebyi anakanyisisiweke lebyi kongomisiweke eka vaxavi!