PTFE tef reusability ya dogara da dalilai hudu: m tsari (high crosslink yawa, low silicone hijirarsa, microphase tsarin for repositionable tack), substrate anchoring (surface kunnawa + firamare don hana cikakken m canja wurin), backside shafi (saki Layer don kare m a lokacin unwinding), da kuma dacewa handling (tsaftace-tsaftacewa m surface). Abubuwan adhesives da za a iya wanke ruwa na iya murmurewa> 90% tack bayan tsaftacewa.

Ƙunƙashin zafin jiki na fiberglass shine babban dalilin rashin kwanciyar hankali na tef na PTFE. A PTFE sintering yanayin zafi (360-400 ° C), saura danniya saƙa da aka saki. Idan ba a tsare ba, masana'anta suna raguwa; idan an kame, damuwa na ɓoye yana kulle a ciki, yana haifar da raguwa daga baya yayin maganin manne (150-200°C) da dumama amfani ta ƙarshe. Magani: yi amfani da fiberglass da aka saita pre-zafi tare da <0.5% raguwa a 400 ° C, kawar da ragowar damuwa kafin sutura.

Tef ɗin PTFE mai faɗin zafin jiki yana buƙatar PSA silicone wanda ke kiyaye mannewa daga -70°C zuwa 260°C. Maɓallin ƙira mai mahimmanci: Layer na tsaka-tsakin tsaka-tsaki (hana delamination), microstructure na tsibirin teku (MQ resin tsibiran + polysiloxane ci gaba da lokaci), gradient crosslinking (high-density Layer Layer for creep juriya, low-density m Layer for low-temp tack), da zafi-stabilized fillers (cerium oxide for oxide for oxide). ɓangarorin siloxane da aka gyaggyara Phenyl suna hana ƙarancin zafin jiki, yana ba da damar sassauci a ƙasa -100°C.

Tsarin fuskar ƙarshen yanke na tef ɗin zafin zafin jiki na PTFE kai tsaye yana shafar manne da ɗagawa a lokacin aikace-aikacen. Rarrashin tsagawa (rauni mara kyau, kusurwa mara kyau) yana haifar da filaments na manne, yana ɓatar da gefen gefen gefe, 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).

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

PTFE babban tef ɗin zafin jiki 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 lalata 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 rage 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.