Kuchinja Kwemaitiro ePTFE High-Temperature Mucheka Pasi peMamiriro Epamusoro-Tembiricha

PTFE high-temperature jira inoumbwa nePTFE coating uye fiberglass substrate. Kana ichinge yasangana nekuwedzera tembiricha, chinhu ichi hachingo 'nyungudika' pane imwe nguva - chinopinda munhevedzano yekuchinja kunofambira mberi kwemuviri nekemikari muzvikamu zvina zvakasiyana zvakasiyana.

Kubva micro-cracking pa 260 ° C kusvika kupedzisa kuora pa 500 ° C +, kuchinja kwemaitiro kunobata PTFE coating kutanga, ipapo fiberglass substrate. Kunzwisisa matanho aya kwakakosha pakushanda kwakachengeteka uye kwakavimbika.

Aokai PTFE yakaongorora maitiro ekupisa kwePTFE-akavharwa machira pamatembiricha ese. Gwaro iri rinotsanangura matanho mana akakosha ekuchinja kwemaitiro uye rinopa miganhu yetembiricha inoshanda.

Yenguva Yakareba Yebasa Tembiricha Range - Pazasi Inosvika 260°C

Chimiro chese chinoramba chakadzikama asi zvishoma nezvishoma, microscope shanduko inoitika zvishoma nezvishoma.

1. Kuzorora kwePTFE molecular cheni uye crystallinity kugadzirisa

Kuratidzwa kwenguva refu kwekupisa kunokonzeresa kufamba zvishoma nezvishoma kwepolymer molecular cheni uye zvishoma kunosimudza crystallinity. Iyo yekupfeka saka inoshanduka zvishoma brittle nekuwedzera kuoma kwepamusoro. Iyi inzira inononoka - inogona kuyerwa mushure memazana kana zviuru zvemaawa.

2. Kuunganidza kwe interfacial thermal stress

PTFE ine kudziya-yekuwedzera coefficient inosvika 10×10⁻⁵/°C , iri kureba kupfuura fiberglass inosvika 5×10⁻⁶/°C . Kudzokororwa kupisa-kutonhora bhasikoro kunounza kushushikana kwemukati pamuganho wecoating-substrate, pakupedzisira kugadzira micro-cracks nekufamba kwenguva. Iyi ndiyo yekutanga nzira yekuchembera mukati meiyo yakachengeteka inoshanda renji.

3. Volatilization yezvakasara zvinowedzera

Asara ma surfactants uye wetting agents asara kubva mukugadzirwa anoora zvishoma nezvishoma, zvichikonzera kusviba kufenda pamusoro pejira. Izvi kazhinji hazvikuvadze asi zvinoratidza kuti zvinhu zvacho zviri kuchembera.

Tembiricha Kusvika uye Kupfuura Nzvimbo Inonyungudika - Kutenderedza 327°C

Kamwe PTFE yasvika pakunyungudika kwayo, shanduko inoshamisa yemuviri-yechimiro inoitika.

1. Crystalline-dunhu kunyunguduka

Semi-crystalline opaque milky-white PTFE inoshandura kuita amorphous gel-semvura inoperekedzwa nekupinza kwevhoriyamu kuwedzera . Iyo yekupfekedza inorasikirwa nesimba rose remagetsi uye inotanga kupfava uye kuyerera. Panguva ino, jira rinorasikirwa nekugadzikana kwayo kwechidimbu uye kutendeseka kwemaitiro.

2. Delamination pakati pekuvhara uye substrate

Kuderedza simba rakabatana uye kupisa-kuwedzera-kunokonzera kushungurudzika kunokonzera PTFE yakanyungudutswa kuita blister, kuputika, uye kuyerera kubva pamucheka wefiberglass, izvo zvinoguma nekombiji delamination uye kukanganisa kwemaitiro. Iyo isiri-tsvimbo yepamusoro inokuvadzwa nekudaro. Kana delamination yaitika, haidzoreki.

3. Fiberglass inochengetedza skeleton yayo

Iyo fiberglass jira rinoramba rakagadzikana padanho iri. Pasina iyo inodzivirira PTFE layer, isina girazi filaments inova panjodzi yeoxidation uye kukukurwa kwemakemikari.

Yambiro yeAokai PTFE: Kunyangwe nzendo pfupi dziri pamusoro pe327°C zvinokonzeresa kusadzoreka. Iro jira rinogona kutaridzika rakakwana kana ratonhorera, asi iyo PTFE coating yakaparadzaniswa zvachose kubva kune fiberglass, ichirasikirwa nese mechanical kutendeseka.

Kutanga kweKuora Kwekupisa - 400°C kusvika 500°C

PTFE molecular backbones inotanga kemikari cleavage, zvichiunza kuparara kusingadzoreki kwemaitiro.

1. Dominant depolymerization reaction

Pasi penzvimbo dzisina mweya weokisijeni, PTFE inosangana nemhando ye zipper . CC covalent zvisungo pacheni huru inoputsika, ichiburitsa gaseous monomers kunyanya inosanganisira tetrafluoroethylene (inopfuura 95%) uye hexafluoropropylene. Huremu hwemamorekuru hunodonha zvakanyanya, uye iyo PTFE yekuputira inopwanya uye inoparara.

2. Oxidative decomposition pasi pemamiriro e-aerobic

Oxygen inorwisa kabhoni isina radicals uye inogadzira magasi ane muchetura senge carbonyl fluoride (COF₂) uye trifluoromethane, inoperekedzwa nekunhuhwirira kwakapinza kwehuva. Hydrogen fluoride (HF) uye perfluoroisobutylene (PFIB) inogonawo kuburitswa mune mamwe mamiriro.

3. Tevera carbon residu

Yakachena PTFE inopfungaira inenge yakazara isina kabhoni inosara. Kusviba kwemavara pajira kazhinji kunobva kucarbonization yefiberglass sizing agents, zvinosvibisa pamusoro, kana madiki macomonomers mune yakagadziridzwa-giredhi PTFE.

4. Kupiswa kwefiberglass sizing agents

Organic sizing agents akaputirwa pafiberglass filaments inoora pamusoro pe350°C. Girazi filaments inorasikirwa nekubatana, izvo zvinoita kuti jira rive fluffy uye rinowanzoita 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物

Caption: PTFE jira mushure mekuratidzwa kwe450 ° C - kupfekedza kwakaora zvachose, kuchisiya chete kabhoni yakasara uye pachena, fluffy fiberglass.

High-Temperature Destruction Zone – Pamusoro pe500°C

Iyo PTFE yekuputira yanyangarika zvachose, ichisiya chete isina fiberglass substrate iine inoenderera yakakwirira-tembiricha mutoro.

1. Kupfava kweE-girazi fiber

Standard E-glass fiber ine poindi yekupfava inosvika 840°C . Zvakadaro, simba rayo rekusimba rinodzikira zvakanyanya kupfuura 500 ° C. Kana ichipisa kupfuura 800 ° C, jira refiberglass rose rinopfava, rinokanganisa, uye rinopera simba uye rinorasikirwa nerutsigiro rwechimiro.

2. High-tembiricha zvinokambaira uye devitrification

Kuratidzwa kwenguva refu-yepamusoro-tembiricha kunokonzeresa kutambanudza-kutambanudza kwegirazi fibers, kuteverwa ne devitrification uye pulverization iyo inopunzika zvizere chimiro chejira. Panguva ino, jira racho harichazivikanwi semucheka - rinova rakasununguka, risina kusimba guru regirazi fibers.

Pfupiso - Matanho eTembiricha uye Miganho Yakakosha

Aokai PTFE inokurudzira zvakasimba kudzora tembiricha yenguva refu yekushanda iri pasi pe260°C uye kudzikisira nhongonya dzenguva pfupi kusvika pa300°C zvakanyanya kudzivirira kutadza kuita basa uye njodzi dzinogona kuitika dzinokonzerwa nekuderera uye kuora kwemafuta.

Izvo zvakataurwa pamusoro pehunyanzvi zvemukati zvinopihwa ne Jiangsu Aokai New Materials Technology Co., Ltd.

Kana iwe uchida kuwana yakadzama tekinoroji paramita, mamiriro ekushandisa uye yakagadziridzwa mhinduro kune yedu yakazara-range chigadzirwa portfolio, kusanganisira PTFE yakakwirira-tembiricha jira, PTFE yakakwirira-temperature adhesive tepi, PTFE yakakwirira-temperature mesh bhandi, seamless kupisa-press bhandi, single-sided PTFE jira rekudzivirira, high-temperature-fiber-resistant jira, ndapota svika kwatiri kuburikidza neruzivo rwepazasi:

• VaGuo: +86 18944819998

• Mr. Liu: +86 13705266308

Isu tinosimudzira hunyanzvi uye kutendeseka sehuzivi hwebhizinesi redu rekutanga, rakazvipira kupa imwe-yekumira maindasitiri mhinduro uye ine kufunga-inotungamirwa nevatengi!