Nsalu yotentha kwambiri ya PTFE (PTFE-yokutidwa ndi fiberglass) imapereka kukana kwamankhwala kwapadera, kupirira ma acid (kuphatikiza aqua regia), alkali amphamvu (kutentha kwachipinda), zosungunulira organic, ndi ma oxidizing agents. Kupatulapo: zitsulo zosungunuka za alkali ndi ma halogen otenthetsera kwambiri amaukira PTFE. Kuwonongeka kwa zokutira kumawonetsa magalasi a fiberglass ku hydrofluoric acid ndi ma alkali otentha kwambiri. Kutentha pamwamba pa 260 ° C kumachepetsa kukana. Pazinthu zambiri zama mankhwala, nsalu ya PTFE imakhalabe yokhazikika komanso yodalirika.

Nsalu zotentha kwambiri za PTFE zimakhala ndi magalasi apamwamba kwambiri a fiberglass ndi PTFE zokutira. Ntchito zazikuluzikulu zotumizira mafakitale (kuphika chakudya, kuyanika nsalu, zoyendera za PCB), chitetezo chowotcherera (zophimba zotchingira kutentha, zishango za spatter), kugwetsa ndi kupanga atolankhani otentha (kuumba mphira, PV lamination), kutchinjiriza magetsi (motor slot liners, zokutira zingwe), zomanga (madenga apabwalo, 30 + corrosion yazaka), mlengalenga (mabulangete otentha), ndi ntchito zapadera (kudula laser, kusindikiza kwa 3D).

Kuyanika ndi gawo lofunika kwambiri pakupanga nsalu za PTFE zotentha kwambiri. Zowonongeka zodziwika bwino ndi izi: kung'amba (kuyanika mwachangu, kupukuta khungu), kusuntha (tinthu tating'onoting'ono tating'onoting'ono), mapini / matuza (mpweya wotsekeka kapena nthunzi), mawanga oyera ndi choko (kusuntha kwa surfactant kapena kusakanizika kosakwanira), chikasu / kuphika (kutenthedwa kwa zowonjezera), delamination (kutsika kwapang'onopang'ono) shrinkage), pamwamba youma koma mkati monyowa (kukopa misampha chinyezi), ndi m'mbali zokhuthala (khofi-ring effect). Zothetserazo zimaphatikizapo mbiri yowumitsa bwino, mpweya wabwino, ndi kusamalidwa bwino kwa gawo lapansi.

PTFE emulsion impregnation wa fiberglass nsalu amafuna othandizira osiyanasiyana kukwaniritsa ❖ kuyanika yunifolomu, adhesion amphamvu, ndi malo opanda chilema. Zowonjezera zazikulu ndizo: zonyowetsa (kuchepetsa kupsinjika kwa pamwamba, kupititsa patsogolo kulowa), thickeners (kuwongolera kukhuthala ndi kulemera kwa zokutira), zowongolera pH (kukhazikika emulsion pa pH 9-10), ma silane coupling agents (owonjezera kumamatira kugalasi), zida zopangira mafilimu (PFA/FEP ya sintering), zodzaza ntchito (zoletsa kubisala), zoletsa kubisala (kuchedwetsa kuyanika). Kusankhidwa kumatengera gawo lapansi komanso zofunikira pakuchita.

Nsalu yagalasi yowonjezera ya fiberglass (nsalu ya ulusi wochuluka) imasiyana kwambiri ndi nsalu wamba ya fiberglass mu kapangidwe ka ulusi. Kupyolera mu chithandizo cha jeti ya mpweya wothamanga kwambiri, zitsulo zamagalasi zopitirira zimalekanitsidwa, zopindika, ndi kufinyidwa kukhala ulusi wowala, wonga thonje. Izi zimapanga nsalu zokulirapo, zofewa zokhala ndi kutenthetsa kwapamwamba kwambiri (zosanjikiza mpweya), kufananiza bwino, kusefera kwapamwamba, komanso kukana kung'ambika / kusinthasintha - pamtengo wa mphamvu yotsika pang'ono. Amagwiritsidwa ntchito popanga ma gaskets otentha kwambiri, zokutira mapaipi, zikwama zosefera, ndi zisindikizo za uvuni.

Kuyera kwazinthu zopangira ndi maziko a PTFE ntchito ya nsalu yotentha kwambiri. Emulsion yoyera kwambiri ya PTFE (palibe ma ion zitsulo, palibe zotsalira zochepetsera ma molekyulu) zimatsimikizira kukana kutentha (palibe chikasu mpaka 260 ° C), osasunthika osasunthika, komanso mphamvu yayikulu ya dielectric. Kwa magalasi a fiberglass, E-glass yopanda alkali (Na₂O <0.8%) imasunga mphamvu ndi kutsekemera pa kutentha kwakukulu; magalasi apakati/apamwamba-alkali amachititsa kuwonongeka. Kuchotsa kwathunthu kwa zoluka zoluka kumalepheretsa carbonization ndi delamination. Kuyera kumakhudza mwachindunji moyo wautumiki, kutsata chakudya, komanso kudalirika kwamagetsi.

Kuyanika koyenera kwa nsalu ya fiberglass ndikofunikira pakupaka kwa PTFE, kuyika utomoni, kapena kuyanika. Mankhwala atatu akuluakulu: kuchotsa chinyezi pa 105-120 ° C (10-30 min malinga ndi kulemera kwake), kuyeretsa kwa dewaxing / kutentha kwa 300-450 ° C (LOI <0.1%, kupewa> 500 ° C), ndi kutentha kwa 60-100 ° C musanayambe kupaka. Yang'anirani kutentha kwa uvuni (± 5 ° C), kukakamiza kutulutsa chinyezi, ndikuteteza nsalu zothira silane pansi pa 110 ° C. Sungani nsalu zouma m'matumba osindikizidwa kapena zipinda zouma (<30 ° C, <40% RH).

Nsalu ya PTFE yotentha kwambiri (PTFE-yokutidwa ndi fiberglass) imakhala yocheperako, koma zinthu zina zimayambitsa dzimbiri nthawi zina. Kuukira kwachindunji kwa PTFE kumachitika ndi zitsulo zosungunuka za alkali (sodium, potaziyamu), ma fluorinating agents amphamvu (F₂, ClF₃) pa kutentha kwambiri, ndi alkalis amphamvu osungunuka pamwamba pa 300 ° C. Kudzimbiri kosalunjika kumachitika pamene hydrofluoric acid (HF), alkali yotentha kwambiri, kapena asidi wotentha wa phosphoric alowa ndi zopindika ndikuukira gawo lapansi la fiberglass. Pakuti kwambiri mankhwala utumiki, ntchito koyera PTFE filimu popanda fiberglass.

Nsalu yotentha kwambiri ya PTFE (PTFE-yokutidwa ndi fiberglass) imakhala ndi kukana kwamphamvu kwa kutentha kwapakati pa -70°C mpaka 260°C. Imatha kulekerera kutentha kwapang'onopang'ono, mwachitsanzo, kuchoka pa -50 ° C mufiriji kupita ku makina osindikizira otentha a 260 ° C. Maphunziro apamwamba amapulumuka ngakhale kuzizira kwadzidzidzi kuchokera ku 260 ° C mpaka 10 ° C madzi. Komabe, kugwedeza zinthu kuchokera kutentha pamwamba pa 300 ° C (pafupi ndi PTFE's 327 ° C melting point) kungayambitse kusweka ndi delamination mwamsanga. Gawo la fiberglass limapereka bata laling'ono; Chophimba cha PTFE ndiye cholepheretsa.

PTFE mkulu-kutentha nsalu chimagwiritsidwa ntchito makampani mankhwala kwa ntchito zisanu ndi ziwiri zofunika: flange gaskets ndi linings chitoliro (amakana zidulo amphamvu / alkalis), riyakitala ndi linings thanki (kupewa dzimbiri zitsulo, kuyeretsa mosavuta), matumba fyuluta kwa dzimbiri chitoliro mpweya (mpaka 260 ° C), odana dzimbiri kukulitsa, zomangira zomangira, zomangira zomangira, zomangira zomangira, zomangira zomangira, zomangira zomangira zolumikizira. composite akamaumba, ndi magetsi / matenthedwe kutchinjiriza wraps. FDA ndi UL magiredi alipo.