Canje-canjen Tsarin PTFE Tufafin Maɗaukakin Zazzabi Ƙarƙashin Yanayin Zazzabi

PTFE high-zazzabi zane ne a hada da PTFE shafi da fiberglass substrate. Lokacin da aka fallasa zuwa ƙarin yanayin zafi, wannan kayan ba wai kawai ''narke''' bane a lokaci ɗaya - yana fuskantar jerin sauye-sauye na zahiri da sinadarai a cikin jeri huɗu daban-daban na zafin jiki.

Daga micro-cracking a 260 ° C don kammala bazuwa a 500 ° C +, sauye-sauyen tsarin suna shafar shafi na PTFE da farko, sannan fiberlass substrate. Fahimtar waɗannan matakan yana da mahimmanci don aiki mai aminci da aminci.

Aokai PTFE ya bincikar yanayin zafi na yadudduka masu rufin PTFE a duk kewayon zafin jiki. Wannan jagorar yana bayyana mahimman matakai guda huɗu na canjin tsari kuma yana ba da iyakokin zafin jiki mai amfani.

Matsakaicin Zazzabin Sabis na Tsawon Lokaci - Kasa Kimanin 260°C

Tsarin gabaɗaya yana da ɗan kwanciyar hankali yayin da a hankali, gyare-gyare na ƙananan ƙananan abubuwa na faruwa a hankali.

1. shakatawa na sassan kwayoyin PTFE da daidaitawar crystallinity

Bayyanar zafi na dogon lokaci yana haifar da motsi a hankali na sarƙoƙi na kwayoyin polymer kuma yana ɗaga kristal kaɗan kaɗan. Rufin ta haka ya juya dan kadan tare da ƙãra taurin saman. Wannan tsari ne a hankali - ana iya aunawa bayan daruruwan ko dubban sa'o'i.

2. Taruwar damuwa na thermal interfacial

PTFE yana da ma'aunin haɓakar thermal-expansion na kusan 10 × 10⁻⁵/°C , wanda yafi girman fiberglass a kusan 5 × 10⁻⁶/°C . Maimaita hawan keke mai zafi-sanyi yana haifar da damuwa na ciki a kan iyakar abin da ya shafa, a ƙarshe yana haifar da ƙananan fasa cikin lokaci. Wannan shine farkon tsarin tsufa a cikin amintaccen kewayon aiki.

3. Volatilitelisation na sauran additives

Ragowar abubuwan da suka rage da abubuwan da suka rage daga samarwa suna lalacewa kaɗan da kaɗan, suna haifar da duhun duhu a saman masana'anta. Wannan yawanci bashi da lahani amma yana nuna kayan yana tsufa.

Yanayin zafi yana Gabatowa da Wucewa Wurin narkewa - Kusan 327°C

Da zarar PTFE ta kai ga zafinta na narkewa, canji na zahiri-tsari yana faruwa.

1. Crystalline-yanki narke

Semi-crystalline opaque milky-white PTFE yana jujjuyawa zuwa wani ruwa mai kama da gel mai kama da ƙari mai kaifi . Rufin ya rasa duk ƙarfin injiniya kuma ya fara yin laushi da gudana. A wannan lokacin, masana'anta sun rasa daidaiton girman girmansa da daidaiton tsari.

2. Delamination tsakanin shafi da substrate

Rage ƙarfin haɗin kai da haɓakar zafin zafi yana haifar da narkakkar PTFE zuwa blister, barewa, da gudana daga masana'anta na fiberglass, wanda ke haifar da haɓakar haɗin gwiwa da gazawar tsari. Wurin da ba na sanda ba ya lalace saboda haka. Da zarar delamination ya faru, ba zai iya jurewa ba.

3. Fiberglass yana kula da tsarin kwarangwal

Gilashin fiberglass ya kasance mai tsayi sosai a wannan matakin. Ba tare da kariyar PTFE mai kariya ba, filaments na gilashin danda ba su da haɗari ga oxidation da yashwar sinadarai.

Gargadi na Aokai PTFE: Ko da taƙaitaccen balaguron balaguro sama da 327°C yana haifar da ɓarna da ba za a iya jurewa ba. Yaduwar na iya zama daidai lokacin da sanyi, amma murfin PTFE ya rabu har abada daga fiberglass, ya rasa duk amincin injina.

Farkon Rushewar Thermal - 400 ° C zuwa 500 ° C

PTFE kwayoyin bayan kasusuwa suna fara tarwatsewar sinadarai, suna kawo rushewar tsarin da ba za a iya jurewa ba.

1. Mahimman ra'ayi na depolymerization

Ƙarƙashin mahalli marasa oxygen, PTFE yana fuskantar lalata irin nau'in zik din . CC covalent bonds a kan babban sarkar ya rushe, yana sakin gas monomers da farko wanda ya ƙunshi tetrafluoroethylene (sama da 95%) da hexafluoropropylene. Nauyin kwayoyin halitta yana faɗuwa sosai, kuma murfin PTFE yana jujjuyawa kuma ya ɓace.

2. Bazuwar Oxidative a ƙarƙashin yanayin aerobic

Oxygen yana kai hari ga carbon-free radicals kuma yana haifar da iskar gas mai guba kamar carbonyl fluoride (COF₂) da trifluoromethane, tare da kaifi mai ɗanɗano mai tsami. Ana iya fitar da sinadarin hydrogen fluoride (HF) da perfluoroisobutylene (PFIB) a ƙarƙashin wasu sharuɗɗa.

3. Gano ragowar carbon

Tsaftataccen PTFE yana vaporizes kusan gaba ɗaya ba tare da ragowar carbon ba. Baƙar fata a kan masana'anta yakan samo asali ne daga carbonization na ma'auni na fiberglass, gurɓataccen yanayi, ko ƙananan masu haɗin gwiwa a cikin PTFE da aka gyara.

4. Kone-kashe na fiberglass masu girman girman

Ma'auni masu girma dabam waɗanda aka lulluɓe akan filaye na fiberglass suna lalacewa sama da 350 ° C. Filayen gilashi suna rasa mannewa juna, wanda ke sa masana'anta su yi laushi kuma suna iya jurewa.

(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本节末尾，展示PTFE在400°C以上分解后仅剩碳化残留物和裸霤物和裸霤物和裸霤物和裸霤的：

Bayani: PTFE masana'anta bayan bayyanar 450 ° C - shafi gaba ɗaya bazuwa, yana barin ragowar carbonized da fallasa, fiberglass mai laushi.

Yankin Lalacewar Zazzabi Mai Girma - Sama da 500 ° C

Shafi na PTFE ya ɓace gaba ɗaya, yana barin ƙaramin fiberglass kawai wanda ke ɗauke da nauyin zafin jiki mai ci gaba.

1. Taushi na E-glass fiber

Standard E-glass fiber yana da wurin laushi na kusan 840 ° C. Duk da haka, ƙarfin ƙarfinsa yana raguwa sosai sama da 500 ° C. Lokacin da zafi ya wuce 800°C, gabaɗayan tufafin fiberglass yana laushi, ya lalace, da sags kuma ya rasa ƙarfin tallafi na tsari.

2. High-zazzabi mai rarrafe da karkatar da hankali

Tsawaita yanayin zafi mai tsayi yana haifar da zazzaɓi-miƙen filayen gilashin, wanda ke biye da ɓarna da ɓarkewa wanda ke rugujewar tsarin masana'anta gaba ɗaya. A wannan mataki, masana'anta ba za a iya gane su a matsayin kayan yadi ba - ya zama sako-sako, ƙananan ƙwayar gilashin gilashi.

Takaitawa - Matakan Zazzabi da Mahimman Iyakoki

Aokai PTFE yana ba da shawarar tsananin sarrafa zafin aiki na dogon lokaci ƙasa da 260°C da iyakance kololuwar ɗan gajeren lokaci zuwa matsakaicin 300°C don gujewa gazawar aiki da yuwuwar haɗarin aminci da ke haifar da delamination da lalatawar thermal.

Abubuwan fasaha da aka bayyana a sama an bayar da su ta Jiangsu Aokai New Materials Technology Co., Ltd.

Idan kuna son samun cikakkun sigogin fasaha, yanayin aikace-aikacen da mafita na musamman don babban fayil ɗin samfurin mu mai cikakken kewayon, gami da zane mai zafin jiki na PTFE, PTFE high-zazzabi manne tef, PTFE high-zazzabi raga bel, m zafi-latsa bel, guda-gefe PTFE masana'anta, high-resistant fiber-tsalle-tsare mu ta hanyar da za a iya amfani da fiberglass, high-resistant fiber-glazing mu. cikakken bayani a kasa:

• Mr. Guo: +86 18944819998

• Malam Liu: +86 13705266308

Muna ɗaukan ƙwararru da mutunci a matsayin ainihin falsafar kasuwancinmu, da himma don samar da mafita na masana'antu na tsayawa ɗaya da sabis na abokin ciniki mai tunani!