PTFE high-themperature cloth insulating gaskets kopanya matla a dielectric a phahameng (a tsitsitseng tlas'a mongobo), -70 ° C ho 260 ° C mocheso oa mocheso, lik'hemik'hale tsa bokahohleng (ntle le litšepe tsa alkali tse qhibilihantsoeng), holim'a metsi a sa tsitsang (thibela creepage), anti-creep (fiberglass reinforcement vs. friction e tlaase μ5 = 0.0 . Tekanyo ea mollo ea V-0. Ha ho bapisoa le mica, rabara, le li-gaskets tse hloekileng tsa PTFE, lesela la PTFE le fana ka maemo a holimo, a sebetsang hantle, le botsitso ba nako e telele. E loketse li-transformer, ho kenya motlakase, ho tiisa flange ea lik'hemik'hale, le lisebelisoa tsa semiconductor.

PTFE lesela flatness nakong sintering hloka e nepahetseng tsitsipano, mocheso, le taolo ya thibelo. Mekhoa ea mantlha: mochini oa stenter (lipoleiti tsa pin li boloka bophara, li thibela ho fokotseha ha weft), profil ea mocheso oa gradient (ho futhumala butle → 380-400 ° C tšoara → ho pholile butle ka tlase ho 310 ° C pele ho lokolla tsitsipano), substrate e senyehileng pele (e tlosa khatello ea ho loha pele e roaloa), le botenya ba ho roala junifomo (ho thibela ho qhibiliha ho fapaneng). Thibelo e tsitsitseng e tlameha ho bolokoa ho fihlela ho pholile ka tlas'a ntlha ea crystallization ea PTFE (hoo e ka bang 310 ° C) ho thibela ntoa.

Ho apara ho tšoana nakong ea PTFE emulsion impregnation ea lesela la fiberglass ke mokhoa oa bophelo oa boleng ba sehlahisoa. Lisosa tse sa tšoaneng tsa ho roala: ho hlōleha ha lithupa (ho khomarela libakeng tse tšesaane), bofokoli ba mochine (khatello ea maikutlo, ho taboha), ho se tsitse ha motlakase (ho theoha ha motlakase ho ea ho 1/10), ho kenella ka lik'hemik'hale (pinhole corrosion), litaba tsa dimensional (warpage), le liphoso tsa ho sebetsa (ho lelera ka lebanta, ho fetoha ha botenya). Ho roala ka mokhoa o ts'oanang ho hloka taolo e nepahetseng ea viscosity ea emulsion, dikahare tse tiileng, tsitsipano ea masela, likheo tse petetsang, le li-profiles tsa multi-zone drying / sintering.

Lesela la mocheso o phahameng oa PTFE le kena ka mekhahlelo e mene ea phetoho ea mohaho ha mocheso o ntse o phahama: ka tlase ho 260 ° C - butle-butle ho phunyeha ha micro-cracking le ho salla ho eketsa matla; ka 327 ° C (sebaka sa ho qhibiliha) - phetoho ea crystalline-to-amorphous, ho roala ho kokobetsa, ho senya ho tloha fiberglass; 400-500 ° C - PTFE depolymerizes (e lokolla likhase tse chefo), ho roala hoa nyamela; ka holimo ho 500 ° C - fiberglass e nolofatsa (840 ° C e nolofatsa ntlha) mme e lahleheloa ke botšepehi ba sebopeho. Lula ka tlase ho 260°C kamehla, qoba >300°C tlhoro bakeng sa ts'ebetso e sireletsehileng.

Phekolo ea lesela la mocheso o phahameng oa PTFE e senya ho se sebetse ha lik'hemik'hale bakeng sa bonding/printing. Mekhoa e mene: etching ea lik'hemik'hale (sodium-naphthalene, matla a holim'a 20→ 40-50 dyn / cm, lera le lefifi le sa feleng, sebopeho sa micro-porous), phekolo ea plasma (nano-roughening, grafting ea sehlopha se sebetsang, fensetere e khutšoanyane e sebetsang), phekolo ea corona (filimi e tšesaane, ho senyeha ka potlako, botebo bo fokolang), le phekolo ea laser (ho nepahala micro-patterning, controlled carbonization). Mekhoa eohle ea 'mele e hlabang le ho hlahisa lihlopha tsa polar ka lik'hemik'hale (C=O, -OH, -COOH) ho etsa hore ho khonehe ho kopanya.

Bohloeki ba lintho tse tala ke motheo oa motheo oa boleng ba lesela la mocheso o phahameng oa PTFE. Litšila (masala a qalang, li-surfactants, li-ion tsa tšepe, li-agent tse silafetseng) li baka ho senyeha ha mocheso pele ho nako (lipulunyana, ho phatloha ka holimo ho 260 ° C), libaka tse sa tsitsang tse sa tsitsang (lintlha tse khomarelang), ho fokotsa motlakase (tahlehelo ea dielectric, ho fokotseha ha matla), ho fokolisa matla a mochine, ho fokolisa matla a mochine (stress coloring), Lisebelisoa tse tala tse phahameng li netefatsa hore lesela la PTFE le lumellana le FDA, le phela nako e telele, le sebetsa hantle haholo.

Ho roala lesela la fiberglass e koahetsoeng ke PTFE ho hloka nako e nepahetseng ea ho tšoara 370-400°C. Libōpi tse tsoelang pele: 30-90s (e tšesaane) ho 3-5 + min (e teteaneng). Libōpi tsa lihlopha: 5-15 min. Tlas'a sintering etsa hore opaque, le mahoasheng lira hore ebola; ho tebela ho feta tekano ho baka bosehla, ho brittleness le ho tsoa ha khase e chefo ea fluoride. Ts'ebetso ea ts'ebetso: sebelisa li-trackers tsa mocheso oa sebōpi, etsa tlhahlobo ea pono (e hlakileng, e bonolo), 'me u etse liteko tsa ho hula tepi. Kamehla etsa bonnete ba ho lumellana ha mocheso o feletseng.

Lesela la mocheso o phahameng oa PTFE le hloka ho tšoaroa ka hloko ho netefatsa polokeho le bophelo bo bolelele. Litlhokomelo tsa bohlokoa: le ka mohla u se ke ua feta 260 ° C (ka holimo ho 320 ° C e ntša mosi o chefo), qoba likheo tse bohale (ho roala mapetsong, ho pepesa fiberglass), ho se hloekisoe ka mokhoa o senyang (boea ba tšepe bo senya bokaholimo bo se nang thupa), boloka sebaka sa ho atolosa mocheso (ho thibela ho taboha), 'me u nke sebaka ha se entsoe kapa se eboloa. Lebenkele le phuthiloe, hole le UV. Apara liatlana tse thibelang mocheso nakong ea ho tšoara.

PTFE lesela la mocheso o phahameng oa mocheso le na le coefficient ea ho atolosa mocheso (CTE) ea 30-60 ppm / ° C (warp / weft) - e phahameng ho feta fiberglass feela empa e le tlase haholo ho feta PTFE e hloekileng (100-200 ppm / ° C). PTFE e etsa liphetoho tse potlakileng tsa molumo (1-2%) ho 19°C le 30°C phato ea liphetoho. Ho qoba ho phunya, ho taboha le ho qhekella: tumello ea moralo bakeng sa katoloso ea mahala, qoba tsitsipano ka har'a lithempereichara tsa phetoho, sebelisa li-tensioner tse ikemetseng mabanta a conveyor, 'me u sebelise moralo oa anti-buckling overlap. Ho hlahloba khafetsa ho phalla ha serame ho bohlokoa.

Masela a ho baka a mocheso a phahameng a PTFE a fana ka melemo e mene ea bohlokoa: ts'ebetso e sa tsitsang (ha ho na oli kapa phofo e hlokahalang, li-pastry tse bonolo li lokolloa ka mokhoa o hloekileng), mefuta e mengata ea mocheso (-70 ° C ho ea ho 260 ° C, e bolokehile bakeng sa ontong ho ea sehatsetsing), ho sebelisoa hape (li-cycles tse likete, ho bonolo ho hloekisa), esita le conduction ea mocheso (e thibela ho chesa, ho leka-lekana ho sootho). E tsamaellana le FDA ea boemo ba lijo, e ntša pampiri e entsoeng ka letlalo 'me e feta limmete tsa silicone tse nang le mocheso o betere le sebopeho se setle sa bokaholimo.