Wannan taƙaitaccen bayani na fasaha daga Jiangsu Aokai yayi nazarin yadda ƙananan ƙarancin zafin jiki ko babban zafin jiki ke lalata zane mai zafin jiki na PTFE. Low sintering bar barbashi unnalk, haifar micro-pores, rauni shafi-substrate bonding, m saman, matalauta inji ƙarfi, da madara opaque bayyanar. Tsananin zafi yana haifar da lalata yanayin zafi na PTFE, samar da raƙuman ruwa, kumfa, raguwa, launin rawaya-zuwa-baƙi, da sakin hayaki mai guba. Dukkanin matsananci biyu suna lalata ƙaƙƙarfan aiki, rashin aiki, sassauci, rufi, da kwanciyar hankali.

PTFE high-zazzabi zane insulating gaskets hada high dielectric ƙarfi (barga a karkashin zafi), -70 ° C zuwa 260 ° C zafin jiki kewayon, duniya sinadaran juriya (sai narkakkar alkali karafa), ba sanda surface (hana creepage), anti-creep (fiberglass ƙarfafa vs. tsarki PTFE), high tensile ƙarfi = 0 flaction.5-μme, low flaction. rating. Idan aka kwatanta da mica, roba, da gaskets PTFE mai tsabta, zane na PTFE yana ba da sassauci mafi girma, iya aiki, da kwanciyar hankali na tsawon lokaci. Mafi dacewa don masu canzawa, rufin mota, sinadari flange sealing, da semiconductor kayan aiki.

Farashin emulsion na PTFE yana tasiri da abubuwan da ke cikin dukkan sarkar masana'antu. Haɓakawa na sama (haƙar ma'adinai na fluorite, ƙimar firiji R22) saita bene farashin tushe. Buƙatun ƙasa daga masu ɗaure batirin lithium shine babban direban haɓaka haɓaka. Abubuwan da ake samarwa (yawan aikin masana'antu, kulawar shuka) da ingancin samfur (m abun ciki mai ƙarfi, girman barbashi, ƙimar tsabta) suna haifar da tiers farashin. Dokokin Muhalli (Hanyoyin PFOA/PFAS) suna haɓaka farashin yarda. Ƙididdiga ( sufurin sarkar sanyi ) yana ƙara kashe kuɗi mai yawa. Hanyoyin farashi suna biye da ainihin ma'ana: fluorite/hydrofluoric acid halin kaka = bene; sabon buƙatun baturin makamashi = alƙawarin yanayin; Ƙididdigar aiki da manufofi = abubuwan da ke haifar da rashin ƙarfi na gajeren lokaci.

Tef ɗin PTFE don bututun sinadari / jigila anti-lalata, mara sanda, da kariyar rufewa yana buƙatar madaidaicin ma'auni, tsarin mannewa, da kafofin watsa labarai na sinadarai. Silicone PSA ana bada shawarar don 200-260 ° C tare da acid / alkalis; acrylic PSA yana tsayayya da kaushi na halitta amma yana iyakance zafin jiki zuwa ≤150°C. Don HF, tafasa> 80% alkali, ko chlorine trifluoride, yi amfani da rufin PTFE-kawai (babu mannen kwayoyin halitta). Mahimmanci: m shine hanyar haɗi mafi rauni, ba PTFE kanta ba.

PTFE shimfidar tufa a lokacin sintering yana buƙatar madaidaicin tashin hankali, zafin jiki, da kulawar kamewa. Hanyoyi masu mahimmanci: na'ura mai mahimmanci (filin faranti suna kula da nisa, hana raguwar weft), bayanin martabar zafin jiki (jinkirin zafi → 380-400 ° C riƙe → jinkirin sanyaya ƙasa 310 ° C kafin sakin tashin hankali), pre-shrunk substrate (yana kawar da damuwa na saƙa kafin sutura), da kauri mai launi (hana narke bambanci). Dole ne a kiyaye kamewar senter har sai an sanyaya ƙasa da ma'aunin crystallization na PTFE (kimanin 310°C) don hana wargin.

Rufe uniformity a lokacin PTFE emulsion impregnation na fiberglass masana'anta ne lifeline na samfurin ingancin. Rashin daidaituwa yana haifar da: gazawar rashin sanda (maidowa a wuraren bakin ciki), rauni na injiniya (ƙaramar damuwa, tsagewa), rashin kwanciyar hankali na lantarki (ƙaramar wutar lantarki ta ragu zuwa 1/10), shigar da sinadarai (lalata pinhole), al'amurra masu girma (warpage), da lahani (yawan belt, bambancin kauri). Rubutun Uniform yana buƙatar daidaitaccen sarrafa emulsion danko, m abun ciki, masana'anta tashin hankali, matsi gibba, da Multi-zone bushewa/sintering profiles.

PTFE tef rike ikon da aka inganta via shafi da kuma curing tsari ingantawa. Rufe: Layer na farko (0.5-2μm silane primer yana hana kwasfa mai ɗaure), kauri mai maɗaukaki 30-60μm (mafi dacewa don riƙe da iko), ɓarna ɓarna, da tacewa 5-10μm. Curing: stepwise dumama (80-100 ° C sauran ƙarfi cire → 120-140 ° C siffata → 150-220 ° C zurfin crosslinking), post-curing (40-60 ° C for 24-48h don shakata danniya), da kuma low-tashin isarwa don hana ciki danniya daga substrate shrinkage. Fim ɗin yana da mahimmanci don ƙarancin ƙarfin saman PTFE.

Tufafin zafin jiki na PTFE yana jurewa matakai huɗu na canjin tsari yayin da zafin jiki ya tashi: ƙasa da 260 ° C - jinkirin micro-cracking da ragowar ƙari; a 327 ° C (ma'anar narkewa) - crystalline-to-amorphous miƙa mulki, shafi mai laushi, delaminates daga fiberglass; 400-500 ° C - PTFE depolymerizes (saki gas mai guba), shafi ya ɓace; sama da 500°C – Fiberglass yana laushi (840°C wurin laushi) kuma ya rasa daidaiton tsari. Tsaya ƙasa da 260°C ci gaba, guje wa kololuwar 300°C don amintaccen aiki.

PTFE high-zazzabi zane da aka samar via ko dai guda-tsoma impregnation (daya pass: azumi, low-cost, bakin ciki shafi, m surface tare da pinholes) ko Multi-tsoma impregnation (2-3+ wucewa: santsi, m, filhole-free shafi, PTFE abun ciki 50-70%, premium yi, mafi girma kudin). Tsoma guda ɗaya ya dace da ƙananan gaskets, tabarma na wucin gadi, da kayan numfashi. Ana buƙatar tsomawa da yawa don zanen burodin abinci, bel ɗin jigilar da ba na sanda ba, manyan abubuwan da'irar da'ira, masu layin sinadarai, da membranes na gine-gine.

PTFE high-zazzabi zane surface jiyya karya sinadaran inertness ga bonding / bugu. Hanyoyi hudu: sinadaran etching (sodium-naphthalene, surface makamashi 20→40-50 dyn / cm, m duhu Layer, micro-porous tsarin), plasma jiyya (nano-roughening, aikin kungiyar grafting, short aiki taga), corona jiyya (na bakin ciki-fim, sauri lalata, iyaka zurfin), da kuma Laser jiyya (madaidaici micro-patterning, sarrafa carbonization). Duk hanyoyin da za a yi su ta jiki da kuma suna gabatar da ƙungiyoyin polar (C=O, -OH, -COOH) don ba da damar haɗin kai.