Kusintha Kwamapangidwe a PTFE Nsalu Yotentha Kwambiri Pansi pa Kutentha Kwambiri

PTFE mkulu-kutentha nsalu ndi gulu la PTFE ❖ kuyanika ndi fiberglass gawo lapansi. Ikakumana ndi kutentha kowonjezereka, zinthuzi sizimangosungunuka 'panthawi imodzi' - zimasintha pang'onopang'ono thupi ndi makemikolo pamitundu inayi yosiyana ya kutentha.

Kuchokera pakuphwanyidwa kwapang'onopang'ono pa 260 ° C mpaka kuwonongeka kwathunthu pa 500 ° C +, kusintha kwapangidwe kumakhudza kupaka PTFE poyamba, ndiye gawo lapansi la fiberglass. Kumvetsetsa magawowa ndikofunikira kuti pakhale ntchito yotetezeka komanso yodalirika.

Aokai PTFE yasanthula momwe nsalu zokutidwa ndi PTFE zimatenthedwa pamatenthedwe onse. Bukhuli likufotokoza magawo anayi ofunikira a kusintha kwapangidwe ndipo limapereka malire othandiza a kutentha.

Kutentha kwa Utumiki Wanthawi Yaitali - Pansi pa Pafupifupi 260 ° C

Kapangidwe kake kamakhala kokhazikika pomwe kusintha kwapang'onopang'ono, kowoneka bwino kumachitika pang'onopang'ono.

1. Kupumula kwa PTFE unyolo wa maselo ndi kusintha kwa crystallinity

Kutentha kwa nthawi yayitali kumayambitsa kusuntha kwapang'onopang'ono kwa unyolo wa ma polima a molekyulu ndipo pang'onopang'ono kumakweza kukongola kwa crystallinity. Chophimbacho chimasanduka chophwanyika pang'ono ndikuwonjezeka kuuma kwapamwamba. Iyi ndi njira yapang'onopang'ono - yoyezedwa pambuyo pa mazana kapena masauzande a maola.

2. Kuchulukana kwapakati pakutentha kwapakati

PTFE imakhala ndi mphamvu yowonjezera kutentha kwa pafupifupi 10×10⁻⁵/°C , yomwe ndi yokwera kwambiri kuposa fiberglass pafupifupi 5×10⁻⁶/°C . Kupalasa njinga mobwereza bwereza kumapangitsa kuti pakhale kupsinjika kwamkati kumalire a gawo lapansi, kenako kupanga ming'alu yaying'ono pakapita nthawi. Iyi ndiye njira yoyamba yokalamba mkati mwa njira zotetezeka zogwirira ntchito.

3. Volatilization ya zotsalira zowonjezera

Zotsalira zotsalira ndi zonyowetsa zomwe zatsala popanga zimawola pang'onopang'ono, zomwe zimapangitsa kuti pakhale mdima wandiweyani pamwamba pa nsalu. Izi nthawi zambiri zimakhala zopanda vuto koma zikuwonetsa kuti zinthuzo zikukalamba.

Kutentha Kuyandikira ndi Kupitilira Malo Osungunuka - Pafupifupi 327 ° C

PTFE ikafika kutentha kwake, kusintha kwakukulu kwa thupi kumachitika.

1. Kusungunuka kwa kristalo-chigawo

Semi-crystalline opaque milky-white PTFE imasandulika kukhala amorphous gel-ngati madzi otsatizana ndi kukula kwakuthwa kwa voliyumu . Chophimbacho chimataya mphamvu zonse zamakina ndikuyamba kufewetsa ndikuyenda. Panthawiyi, nsaluyo imataya kukhazikika kwake komanso kukhazikika kwapangidwe.

2. Delamination pakati zokutira ndi gawo lapansi

Kuchepetsa mphamvu yolumikizirana komanso kupsinjika komwe kumapangitsa kuti PTFE yosungunuka isungunuke, isungunuke, ndikuyenderera kutali ndi nsalu ya fiberglass, zomwe zimapangitsa kuti pakhale delamination ndi kulephera kwadongosolo. Popanda ndodo pamwamba pake amawonongeka. Pamene delamination ichitika, sichingasinthe.

3. Fiberglass imasunga mawonekedwe ake a mafupa

Nsalu ya fiberglass imakhalabe yokhazikika panthawiyi. Popanda zoteteza PTFE wosanjikiza, opanda galasi filaments kukhala pangozi makutidwe ndi okosijeni ndi kukokoloka mankhwala.

Chenjezo la Aokai PTFE: Ngakhale maulendo afupiafupi pamwamba pa 327°C amachititsa kuti zinthu zisamasinthe. Nsaluyo imatha kuwoneka bwino ikazizira, koma zokutira za PTFE zasiyanitsidwa ndi galasi la fiberglass, kutaya umphumphu wonse wamakina.

Kuyamba kwa Kuwola kwa Matenthedwe - 400 ° C mpaka 500 ° C

Misana ya PTFE ya mamolekyulu imayamba kung'ambika kwa mankhwala, kubweretsa kuwonongeka kosasinthika.

1. Dominant depolymerization reaction

Pansi pa malo opanda mpweya, PTFE imawonongeka ngati zipper . CC covalent bond pa unyolo waukulu akusweka, kutulutsa mpweya monomers makamaka opangidwa tetrafluoroethylene (kuposa 95%) ndi hexafluoropropylene. Kulemera kwa mamolekyulu kumatsika kwambiri, ndipo zokutira za PTFE zimaphwanyidwa ndikuwonongeka.

2. Kuwonongeka kwa okosijeni pansi pazikhalidwe za aerobic

Oxygen imaukira ma radicals opanda mpweya ndipo imatulutsa mpweya wapoizoni monga carbonyl fluoride (COF₂) ndi trifluoromethane, womwe umatsagana ndi fungo lakuthwa lowawasa. Hydrogen fluoride (HF) ndi perfluoroisobutylene (PFIB) amathanso kutulutsidwa pansi pazifukwa zina.

3. Tsatani carbon zotsalira

PTFE yoyera imasungunuka pafupifupi popanda zotsalira za kaboni. Kusanduka kwakuda pansalu nthawi zambiri kumachokera ku carbonization ya fiberglass sizing agents, zoyipitsa pamwamba, kapena ma comonomer ang'onoang'ono mu PTFE yosinthidwa.

4. Kuwotchedwa kwa fiberglass sizing agents

organic sizing agents yokutidwa pa fiberglass filaments kuwola pamwamba 350 ° C. Ulusi wagalasi umataya kumatirana, zomwe zimapangitsa kuti nsaluyo ikhale yofewa komanso sachedwa kunjenjemera.

(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）物的

Mawu: PTFE Nsalu pambuyo pa 450 ° C kukhudzana - ❖ kuyanika kwathunthu kuwonongeka, kusiya zotsalira za carbonized ndi poyera, fluffy fiberglass.

Malo Owonongeka Kwambiri - Pamwamba pa 500 ° C

Chophimba cha PTFE chazimiririka, ndikungotsala gawo limodzi lokhalo lopanda kanthu lokhala ndi katundu wotentha kwambiri.

1. Kufewetsa kwa E-glass fiber

Chingwe chokhazikika cha E-glass chili ndi kufewetsa kwa pafupifupi 840 ° C. Komabe, kulimba kwake kumatsika kwambiri kuposa 500 ° C. Ikatenthedwa kupitirira 800 ° C, nsalu yonse ya fiberglass imafewetsa, imapindika, ndikunyowa ndikutaya mphamvu zothandizira.

2. Kutentha kwambiri kukwawa ndi devitrification

Kutentha kwanthawi yayitali kumapangitsa kuti ulusi wagalasi uwonjezeke, kutsatiridwa ndi devitrification ndi pulverization yomwe imagwetsa kapangidwe ka nsalu. Panthawiyi, nsaluyo siidziwikanso ngati nsalu - imakhala yotayirira, yosalimba ya ulusi wa galasi.

Mwachidule - Magawo a Kutentha ndi Malire Ovuta

Aokai PTFE imalimbikitsa mosamalitsa kuwongolera kutentha kwanthawi yayitali pansi pa 260 ° C ndikuchepetsa nsonga zazifupi mpaka 300 ° C pazipita kuti mupewe kulephera kwa magwiridwe antchito komanso zoopsa zomwe zingachitike chifukwa cha delamination ndi kuwonongeka kwa kutentha.

Zomwe zanenedwa pamwambapa zaukadaulo zimaperekedwa ndi Malingaliro a kampani Jiangsu Aokai New Materials Technology Co., Ltd.

Ngati mukufuna kudziwa zambiri zaukadaulo, zochitika zamagwiritsidwe ntchito ndi njira zosinthira makonda athu onse, kuphatikiza nsalu ya PTFE yotentha kwambiri, tepi yomatira ya PTFE, lamba wotentha kwambiri wa PTFE, lamba wosakanizira kutentha, lamba wambali imodzi PTFE, nsalu yosagwirizana ndi magalasi apamwamba komanso osatentha kwambiri. nsalu, chonde tipezeni kudzera mwatsatanetsatane pansipa:

• Bambo Guo: +86 18944819998

• Bambo Liu: + 86 13705266308

Timalimbikitsa ukatswiri ndi kukhulupirika monga filosofi yathu yayikulu yamabizinesi, odzipereka kupereka mayankho amafakitale amodzi ndi ntchito zoganizira makasitomala!