PTFE high-temperature nsalu insulating gaskets kuphatikiza mkulu dielectric mphamvu (khola pansi chinyezi), -70 °C kwa 260 °C kutentha osiyanasiyana, chilengedwe mankhwala kukana (kupatula zitsulo za alkali wosungunuka), non-ndodo pamwamba (amaletsa creepage), anti-creep (fiberglass reinforcement vs. koyera PTFE, μ=01), mkulu tensi (50 .01) . Mtengo wa V-0. Poyerekeza ndi mica, mphira, ndi ma gaskets oyera a PTFE, nsalu ya PTFE imapereka kusinthasintha kwapamwamba, kusinthika, komanso kukhazikika kwanthawi yayitali. Zoyenera ma thiransifoma, kutchinjiriza kwa mota, kusindikiza ma flange amankhwala, ndi zida za semiconductor.

PTFE nsalu flatness pa sintering amafuna ndendende mavuto, kutentha, ndi kudziletsa. Njira zazikuluzikulu: makina a stenter (mbale za pini zimasunga m'lifupi, zimateteza kuchepa kwa weft), mbiri ya kutentha kwa gradient (kutentha kwapang'onopang'ono → 380-400 ° C kugwira → kuziziritsa pang'onopang'ono pansi pa 310 ° C musanatulutse kukangana), gawo lapansi lomwe lisanadulidwe (kuchotsa kupsinjika kwa kuluka musanakutidwe), ndi makulidwe a yunifolomu ❖ kuyanika (kuletsa kusungunuka kwa kusiyana). Kuletsa kwamphamvu kuyenera kusungidwa mpaka kuzizirira pansi pa PTFE crystallization point (pafupifupi 310 ° C) kuti muteteze tsamba lankhondo.

Kuphimba mofanana pa PTFE emulsion impregnation wa fiberglass nsalu ndi njira ya moyo wa mankhwala khalidwe. Zosafanana zokutira zimayambitsa: kulephera kwa ndodo (kumamatira pa malo oonda), kufooka kwamakina (kupsinjika kwamalingaliro, kung'ambika), kusakhazikika kwamagetsi (kuwonongeka kwamagetsi kumatsikira mpaka 1/10), kulowa kwamankhwala (kuwonongeka kwa pinhole), zovuta zamtundu (warpage), ndi zolakwika pakukonza (kuzungulira kwa lamba, kusiyanasiyana kwa makulidwe). Kupaka yunifolomu kumafuna kuwongolera bwino kwa kukhuthala kwa emulsion, kulimba kolimba, kukangana kwa nsalu, mipata yofinya, ndi mbiri yowumitsa zone / sintering.

Nsalu ya PTFE yotentha kwambiri imakhala ndi magawo anayi a kusintha kwapangidwe pamene kutentha kumakwera: pansi pa 260 ° C - pang'onopang'ono kung'amba pang'onopang'ono ndi kuwonjezereka kotsalira kowonjezera; pa 327 ° C (malo osungunuka) - kusintha kwa crystalline-to-amorphous, kupaka kumafewetsa, kumadetsedwa kuchokera ku fiberglass; 400-500 ° C - PTFE depolymerizes (imatulutsa mpweya wapoizoni), zokutira zimatha; pamwamba pa 500 ° C - fiberglass imafewetsa (840 ° C kufewetsa malo) ndipo imataya kukhulupirika kwadongosolo. Khalani pansi pa 260°C mosalekeza, pewani nsonga>300°C kuti mugwire ntchito motetezeka.

PTFE pamwamba kutentha nsalu pamwamba mankhwala amaswa inertness mankhwala kwa kugwirizana/kusindikiza. Njira zinayi: etching mankhwala (sodium-naphthalene, pamwamba mphamvu 20→ 40-50 dyn/cm, wosanjikiza mdima wokhazikika, micro-porous structure), mankhwala a plasma (nano-roughening, ntchito gulu Ankalumikiza, lalifupi yogwira zenera), corona mankhwala (woonda-filimu, mofulumira kuwola, pang'ono kuya), ndi laser mankhwala (molondola yaying'ono-patterning, controlled carbonization). Njira zonse zimakhala zowawa ndikuyambitsa magulu a polar (C=O, -OH, -COOH) kuti athe kumamatira.

Kuyera kwazinthu zopangira ndiye maziko oyambira amtundu wa PTFE wotentha kwambiri. Zonyansa (zoyambira zotsalira, zopangira zinthu, ma ayoni achitsulo, zinthu zoipitsidwa) zimayambitsa kuwonongeka kwa kutentha msanga (mathovu, matuza opitilira 260 ° C), malo osamata (malo omatira), kuchepetsa kutchinjiriza kwa magetsi (kutayika kwa dielectric, kutsika kwamagetsi), kufowoketsa mphamvu zamakina (ndi kupsinjika kwachikasu), kufooka kwa makina (ndi kupsinjika kwachikasu). Zopangira zoyera kwambiri zimatsimikizira kuti FDA imagwirizana, imakhala ndi moyo wautali, nsalu ya PTFE yogwira ntchito kwambiri.

PTFE- TACHIMATA fiberglass nsalu nsalu sintering amafuna yeniyeni kugwira nthawi pa 370-400 °C. Ng'anjo zopitilira: 30-90s (zoonda) mpaka 3-5+ min (zokhuthala). Ng'anjo zamagulu: 5-15 min. Pansi-sintering kumayambitsa opaque, zokutira zaukali zomwe zimasenda; Kuchuluka kwa sinter kumayambitsa chikasu, brittleness, ndi kutulutsa mpweya wapoizoni wa fluoride. Kukhathamiritsa kwa njira: gwiritsani ntchito zowunikira kutentha kwa ng'anjo, fufuzani zowoneka (zowoneka bwino, zosinthika), ndikuyesa kuyesa kukoka matepi. Nthawi zonse onetsetsani kutentha kokwanira.

Nsalu ya PTFE yotentha kwambiri imafuna kusamala mosamala kuti zitsimikizire chitetezo ndi moyo wautali. Njira zazikulu zodzitetezera: musapitirire 260 ° C (pamwamba pa 320 ° C imatulutsa utsi wapoizoni), pewani zowomba (zopaka ming'alu, zowonetsa magalasi a fiberglass), osatsuka ndi abrasive (ubweya wachitsulo umawononga malo osamangira ndodo), sungani chilolezo chokulitsa kutentha (kuletsa kung'ambika), ndikusintha pamene matuza kapena kusenda. Sitolo idagubuduzika, kutali ndi UV. Valani magolovesi oteteza kutentha mukamagwira ntchito.

Nsalu ya PTFE yotentha kwambiri imakhala ndi coefficient of thermal expansion (CTE) ya 30-60 ppm/°C (warp/weft) - yapamwamba kuposa fiberglass yokha koma yotsika kwambiri kuposa PTFE yoyera (100-200 ppm/°C). PTFE imasintha modzidzimutsa (1-2%) pa 19 ° C ndi 30 ° C kusintha kwa gawo. Kupewa kung'ung'udza, kung'ambika, ndi kung'ambika: zilolezo zamapangidwe kuti zikulitseni kwaulere, pewani kupindika ndi kutentha kwa gawo, gwiritsani ntchito ma tensioner pa malamba otumizira, ndipo gwiritsani ntchito anti-buckling overlop design. Kuyendera pafupipafupi kwa kuzizira ndikofunikira.

PTFE zowotchera nsalu zotentha kwambiri za PTFE zimapereka maubwino anayi ofunikira: kusagwira ntchito (palibe mafuta kapena ufa wofunikira, makeke osakhwima amamasulidwa bwino), kutentha kwakukulu (-70 ° C mpaka 260 ° C, otetezeka ku uvuni mpaka mufiriji), kugwiritsiridwanso ntchito (zikwizikwi, zosavuta kuyeretsa), komanso ngakhale kuwongolera kutentha (kuletsa kuyaka, bulauni moyenera). Mogwirizana ndi chakudya cha FDA, amatulutsa zikopa ndi kupitilira mateti a silikoni okhala ndi kutentha kwabwinoko komanso mawonekedwe owoneka bwino.