Tsarin fuskar ƙarshen yanke na tef ɗin zafin zafin jiki na PTFE kai tsaye yana shafar manne da ɗagawa a lokacin aikace-aikacen. Rashin tsagawa (rauni mara kyau, kusurwa mara kyau) yana haifar da filaments na manne, yana ɓata gefen gefen gefen, kuma yana fallasa burbushin fiberglass - yana haifar da zub da jini, haɗin gwiwa mai rauni, da ɗagawa ƙarƙashin zafi ko tashin hankali. Fuskokin ƙarshen da ba bisa ka'ida ba (wavy, protruding) suna haifar da rarrabawar matsatsi mara daidaituwa, tuƙi mai raɗaɗi yayin ajiya. Maƙasudin ƙarshen fuska yana da santsi, mai laushi, kuma ba tare da lalacewa ba - yana aiki azaman hatimi wanda ke kulle manne kuma yana tabbatar da cikakken haɗin kai.

A lokacin PTFE tef shafi, da sauran ƙarfi volatilization kudi na silicone matsa lamba-m m ne m tsari siga. Sauri da yawa → Fatar jiki, rashin daidaituwa, raƙuman raƙuman ruwa (maganin tarko), da raƙuman ruwa (magudanar ruwa ko gurɓatawa). Jinkirin → sagging, kauri gefuna, da dewetting a kan ƙananan-makamashi PTFE. Kyakkyawan dabara: jinkirin jujjuyawar farko don daidaitawa da kumfa kumfa, sannan hanzarta bushewa don siffata. Yi amfani da gauraye masu kaushi (toluene/xylene + bushewa da sauri) da zafin jiki na gradient (ƙananan → matsakaici → high).

PTFE high-zazzabi tef yana da kyau kwarai gishiri fesa juriya, amma rauni maki ne m Layer da fiberglass substrate gefuna. Hanyoyin kimantawa: Gwajin gishiri mai tsaka-tsaki na 1000h (NSS), auna ma'aunin ƙarfin kwasfa (≥80% da ake buƙata), lahani na gani (ɗagawa, blistering), da lalata substrate na ƙarfe. Don mahalli na ruwa da gishiri-gishiri mai tsayi: yi amfani da PSA silicone (ba acrylic) ba, PTFE mai cike da ciki, gefuna da hatimin hatimi mai jure yanayin, da shafa firam a saman saman ƙarfe.

Tef mai zafin jiki na PTFE yana rasa mannewa bayan amfani da shi akai-akai saboda gurɓatar ƙasa (ƙura, man silicone), gazawar haɗin gwiwa (raguwa), ko haɗin kai mai rauni. Magani: high-crosslink silicone PSA (ƙananan ƙaura, daidaitaccen madaidaicin / ikon riƙewa), jiyya na farko akan PTFE substrate, goyan bayan fiberglass mai yawa, da kulawa mai kyau (tsaftace saman, kwasfa mai sanyi, kusurwar 180°). Gwajin ƙididdiga yana tabbatar da haɓakawa.

Tef mai zafin jiki na PTFE da aka adana a ƙarƙashin ƙayyadaddun yanayi (10-25 ° C, 40-70% RH, nesa da UV/matsi mai nauyi) yana da daidaitaccen rayuwar rayuwar watanni 3-6 (makin ƙima har zuwa watanni 12). Maɓallin lalatawar maɓalli: ƙarfin kwasfa ba dole ba ne ya faɗi ƙasa da 70% na ƙimar farko; babu ragowar mannewa bayan cirewar zafi mai zafi; babu carbonization ko fatattaka a rated zafin jiki. Dubawa mai sauri: jin kwancewar hannu, gwajin ragowar 260°C, da gwajin raguwar lamination.

Tef ɗin PTFE ɗin da aka yi birgima zai iya haɓaka mannewar interlayer (tarewa) da canja wurin m yayin ajiya na dogon lokaci. Dalilai: PTFE film na roba ƙwaƙwalwar ajiya da silicone PSA creep karkashin matsa lamba / zafi. Rigakafin: tashin hankali mai jujjuyawa (tsatsewa na waje, sako-sako na ciki) yayin masana'anta, tare da sakin shafi akan gefen mara mannewa. Ajiye a -15°C zuwa 40°C, 30-70% RH, a kwance akan tarukan, jujjuya jujjuyawar kwata-kwata. Don maki mai kauri mai kauri, ƙara takardan saki tsakanin yadudduka.

PTFE high-zazzabi kaset da aka adana a cikin siffan nadi zai iya sha wahala daga interlayer adhesion (tarewa) da kuma canja wurin m zuwa ga mara sanda gefe. Tushen haddasawa: PTFE fim na roba ƙwaƙwalwar ajiya da silicone PSA creep karkashin matsa lamba da zafi. Magani: tashin hankali mai jujjuyawar gradient - matsewa a kan yadudduka na waje, sako-sako da yadudduka na ciki - ta amfani da sarrafa tashin hankali na rufaffiyar madauki. Cikawa tare da suturar saki, ma'auni mai dacewa (15-40 ° C, 30-70% RH), jeri a kwance, da jujjuyawar kwata-kwata.

Tef mai zafin jiki na PTFE da aka yi amfani da shi a cikin hulɗar abinci dole ne ya mutunta ƙayyadaddun zafin jiki: ≤260°C don ci gaba da amfani (ba iyaka), 260-300°C har zuwa mintuna 30 kawai, kuma> 300°C haramta. Tef ɗin don tuntuɓar kai tsaye ne kawai (masu linin tire, murfin zafi), ba nade abinci kai tsaye ba. Kada a taɓa yin aiki ba tare da nauyin abinci ba (bushewar dumama). Sauya idan blish, yellowed, ko sawa.

Silicone matsa lamba-sensitive adhesives (PSA) don PTFE high-zazzabi kaset bambanta yadu a cikin high-zazzabi na aikin tsufa. Methylphenyl silicone PSA yana riƙe> 85% ƙarfin kwasfa bayan kwanaki 250 ° C/7, yayin da daidaitaccen nau'in methyl ya faɗi zuwa 50-70%. Tsarukan da aka warkar da su (hydrosilylation) suna ba da kwanciyar hankali fiye da warkewar peroxide. Don ci gaba da sabis na 200°C+, zaɓi ƙarin makin da aka warkar da babban-phenyl.

Tef ɗin PTFE masu ɗaukar zafi na zafin jiki (PSA) dole ne su gudanar da zafi yayin tsayawa tsayin daka. Ƙara filaye yana inganta haɓakar zafin jiki amma yana cutar da mannewa. Mafi kyawun ma'auni yana amfani da ƙananan barbashi (kamar kwarangwal) wanda aka haɗe tare da ɓangarorin masu kyau (don cika ɓatacce), adana jimlar abubuwan filler sama da madaidaicin ƙofa. Ka guji flakes da zaruruwa; suna kashe wuta.