PTFE high-themperature cloth insulating gaskets kopanya matla a dielectric a phahameng (a tsitsitse tlas'a mongobo), -70 ° C ho 260 ° C mocheso oa mocheso, lik'hemik'hale tsa bokahohleng (ntle le tšepe ea alkali e qhibilihisitsoeng), holim'a metsi a sa tsitsang (thibela creepage), anti-creep (fiberglass reinforcement vs. friction e tlaase μ5, 0 0.0 . 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, insulation motor, 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 tlase ho 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 emulsion viscosity, dikahare tse tiileng, tsitsipano ea lesela, likheo tse petetsang, le li-profiles tse ngata tsa ho omisa / tsa sintering.

PTFE lesela la mocheso o phahameng oa mocheso le fetoha 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 nyenyane, ho senyeha ka potlako, botebo bo fokolang), le phekolo ea laser (ho nepahala ha micro-patterning, ho laoloa ke 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.

Ho hloeka ha 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 fokotsoa ha motlakase (tahlehelo ea dielectric, matla a tlase a ho senyeha), ho fokolisa matla a mochine (stress coloring), ho fokotseha ha 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. Ntlafatso ea ts'ebetso: sebelisa li-trackers tsa mocheso oa sebōpi, etsa tlhahlobo ea pono (e hlakileng, e tenyetsehang), '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 mahlahahlaha (boea ba tšepe bo senya bokaholimo bo sa thunngoeng), 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 meralo bakeng sa katoloso ea mahala, qoba ho tsitsipana ka har'a lithempereichara tsa phetoho, sebelisa li-tensioner tsa othomathiki mabanta a conveyor, 'me u sebelise moralo oa anti-buckling overlap. Ho hlahlojoa khafetsa bakeng sa ho phalla ha serame ke habohlokoa.

PTFE lesela la mocheso o phahameng oa mocheso oa ho baka limmete li fana ka melemo e mene ea bohlokoa: ts'ebetso e se nang thupa (ha ho na oli kapa phofo e hlokahalang, li-pastry tse bonolo li lokolloa ka mokhoa o hloekileng), mocheso o pharaletseng (-70 ° C ho ea ho 260 ° C, o 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.