Ichi chinyorwa chinobata mashandisirwo ePTFE yakakwirira-tembiricha jira mune kabhoni fiber flat composite zvigadzirwa. Compression molding: yakaiswa pakati pezviumbwa uye prepregs kudzivirira epoxy resin adhesion, zvichiita kuti nyore kudhiza; sandwiched pakati peakawanda matete mapaneru kudzivirira kunamatirana. Vacuum bag molding: reusable kuburitsa firimu pakati pe prepreg uye jira rekufema, kubvumira gasi / resin ndima uku ichigonesa kupepeta nyore mushure mekurapa; textured side inotamisa kunaka kwepamusoro kugadzirwa kuti ivandudze bonding roughness, kubvisa jecha. Kuramba kuchigadzirwa: mabhandi ekutakura asina musono asina tsvimbo anotakura prepregs kuburikidza nekudziya / kudzvanya nzvimbo; cushion layer inogovera kudzvanywa zvakaenzana kuderedza indentations yenzvimbo.

Ichi chinyorwa chinoongorora kugona kwemurazvo kurapwa kwePTFE pamusoro pekugadzirisa uye inoenzanisa mhedzisiro ne corona uye plasma kurapwa. Zvinogoneka: murazvo unogona kushandura PTFE asi isingawanzo shandiswa mumaindasitiri - njodzi dzekuchengetedza (PTFE inoora ichiburitsa chepfu HF uye perfluoroisobutylene); kushanda zvishoma (simba repamusoro chete 30-35 mN / m, inoumba muganhu usina simba). Maitiro ekushanda: murazvo - kwenguva pfupi yakakwirira-tembiricha oxidation (> 1000 ° C), zvishoma etching, mashoma mapoka eokisijeni; corona - high-voltage discharge inogadzira ozone / inoshanda okisijeni, nyoro oxidation, yakaderera simba density haigone kutyora CF zvisungo; plasma - yakakwirira-simba zvidimbu / maerekitironi / emahara radicals anotsemura zvakananga CF zvisungo uye kubatanidza polar mapoka (hydroxyl, carboxyl, amino).

Ichi chinyorwa chinobata mabasa ePTFE mukupisa kwekuvharidzira kuvharika kweinjini dze missile. Nzira ina: Endothermic decomposition - PTFE depolymerizes pa ~ 400 ° C kusvika kune tetrafluoroethylene (yakanyanya endothermic, ~ 3,000 ° C inopisa gasi exposure), inotora kupisa kukuru uye kubvisa simba rinopisa kubva pamadziro. Transpiration cooling uye gasi film insulation - decomposition magasi (tetrafluoroethylene) inopinda kunze kuburikidza ne micro-pores, kubvisa kupisa kwepamusoro; inoyerera gasi firimu inoparadzanisa yakakwirira-tembiricha yekupisa gasi kubva pamadziro, ichidzikisa pedyo-madziro kupisa flux ne> 50%; Gasi firimu rinogadzirisa muganho mbiru velocity/tembiricha, kuderedza kukukurwa kwechikamu.

Ichi chinyorwa chinobata mhedzisiro ye gamma-ray irradiation pane PTFE chimiro uye zvivakwa. Chimiro chemakemikari chinoshanduka: gamma rays inotyora CC main cheni uye CF side cheni (G-value 3.0-3.5), zvichikonzera hombe cheni scission uye drastic molecular weight drop; muokisijeni, mahara radicals anoumba peroxy radicals achiunza acyl fluoride uye carboxylic acid yekupedzisira mapoka (hydrolyzing kuHF). Condensed structure inoshanduka: crystallinity inosimuka pakutanga (yakaderera dose, mafupi maketani anogadzirisazve) zvino inowira (yakakwirira dose, kukanganisa kunokanganisa makristasi); lamellar crystals fragment kuita madiki macrystallites ane akanyangarika kureba kwehurongwa. Kuparara kwepfuma: kureba panguva yekuzorora kunoderera kubva pa0.1 kGy mumhepo, kurasikirwa > 90% pa ~ 1kGy - zvinhu zvinova zvakaoma uye brittle; kunyungudika kunodonha kubva pa327°C kusvika pasi pe310°C; polar mapoka anosimudza zvishoma dielectric kugara / kurasikirwa; kushanduka kwepamusoro kubva kuchena kuenda kune grey / dema nekurasikirwa nekupenya.

Ichi chinyorwa chinovhara nzira dzekudzora crystallinity yePTFE coating paTeflon yepamusoro-tembiricha jira. Kutonhodza mwero wakarongeka wakananga uye unoshanda: Kukurumidza kutonhora (kudzima) kuburikidza nemhepo inotonhora maketeni, roller yekutonhodza kana matangi emvura - cheni dzemamorekuru anoomesa chando asati arairwa kuronga, achigadzira makristasi madiki asina kukwana; kukoira kwakapfava, kuomarara nekuita kwakagadziridzwa kusiri kwetsvimbo, kuderedzwa zvishoma kuomarara / kusapfeka. Kutonhora zvishoma nezvishoma (annealing) kuburikidza nechikamu chekuchengetedza kupisa pa10-50 ° C / h kana kutonhora kwechoto - cheni dzemamorekuru dzinoronga zvizere kuita maspherulites makuru akazara; Coating ine kuomarara kwakanyanya, yakasarudzika kupfeka kuramba, yakagadzikana zviyero, kuderedzwa kuchinjika uye kuwedzera brittleness.

Ichi chinyorwa chinovhara mashandisirwo eTeflon yakakwirira-tembiricha jira mune inopisa-mhepo inotenderera sintering mavira. Zvinogoneka: inogona kushandiswa senge isina-tsvimbo cushion pamabhandi mesh kana tireyi kana tembiricha yevira ≤260 ° C (yakaderera-kupisa kuomesa, binder kubviswa, slurry kupora) - inovandudza dhizaini uye kunhonga kugona. Zvakanyanya kurambidzwa panguva dzepakati/pamusoro tembiricha (300-950°C) — PTFE inoora ichiburitsa chepfu HF uye perfluoroisobutylene, midziyo inoora uye ichikonzera chepfu inouraya. Nheyo yekuchengetedza: kana tembiricha yevira isina kujeka kana isingakwanise kuvimbiswa pazasi 260 ° C, usashandise. Zvinhu zvakakosha: kuenderera mberi kwebasa -70 ° C kusvika 260 ° C, kwenguva pfupi 300 ° C; yakanyanyisa isina-tsvimbo uye inertness yemakemikari; yakanakisa magetsi ekudzivirira; kukweshana kwakaderera (~ 0.04); fiberglass base inopa yakakwira tensile simba.

Ichi chinyorwa chinofananidza mutsauko pakati pe infrared radiation kudziyisa uye kupisa-mhepo kutenderera kudziyisa nzira dzekurapa pane dzakachinjika chimiro kufanana kwesilicone adhesive layer. Maitiro ekutamisa kupisa: mhepo inopisa inotsamira pane convection-conduction ine tembiricha inokwira, diki mukati / kunze kwekushisa kusiyana; IR ine kudzika kushoma kwekupinda nekunyura kwakasimba kwepasi (makumi kusvika kumazana emamicrometer) ichigadzira mawere-kusvika-mukati gradient. Mhedzisiro pakufanana kwecrosslink: mhepo inopisa inoita kuti synchronous kurapa mukati nekunze neuniform crosslink density; IR inokonzeresa kuti nzvimbo yepasi igadzire 'ganda firimu' rakakora iro rinotadzisa kupisa kupisa uye kufamba kwemukati cheni, zvichiita kuti crosslink density ichidzike kubva pamusoro kuenda mukati.

Ichi chinyorwa chinovhara yakajairika mutsara wekumhanyisa renji yeTeflon yakakwirira-tembiricha yejira impregnation yekugadzira mutsara. Nhanho dzekukurumidza: zvigadzirwa zvakajairika (0.08-0.30mm) pa 0.5-3 m / min, yakagadzikana pa 1-3 m / min; zvigadzirwa zvakakora / zvakawanda-zvakaiswa (≥0.4mm) pa 0.3-1 m/min; mitsetse yepamusoro-soro ine mahovhoni marefu inogona kusvika 3-6 m/min asi inoda midziyo. Nzira yezvipingamupinyi: kuomeswa uye sintering inoda nguva yekugara (PTFE inoda 1-3 min pa 380-400 ° C; kusakwana kunokonzera kukanganisa kunamatira / kuputika); kumhanya kunotemerwa nekushomeka kwekuomesa / sintering nguva pasi pehurefu hweovheni yakagadziriswa. Zvipingamupinyi zvezvinhu: yakakwirira yakasimba / viscosity dispersions inopinda zvishoma nezvishoma; machira akakora/akakora anotora mvura uye anotamisa kupisa zvishoma nezvishoma; machira akafara akarerekera kumucheto-pakati mavara akasiyana anoda kukurumidza kudzikiswa. Zvishandiso uye zvemhando yekutengeserana-offs: refu-multi-zone oveni inobvumira kumhanya kwakanyanya.

Ichi chinyorwa chinobata misiyano pakati pePTFE emulsions inogadzirwa nekumisa polymerization vs dispersion polymerization. Kujekesa: kumiswa kwepolymerization hakugone kuburitsa zvakananga PTFE emulsion; yechokwadi PTFE emulsion inouya chete kubva kupararira kwepolymerization. 'Suspension-method emulsion' inonyatso kumiswa kwevhu kumiswa-polymerized resin micropowders. Dispersion polymerization (primary emulsion): spherical particles (0.1-0.3μm, yakamanikana kugovera), yakagadzikana neperfluorinated surfactants, yakanyanya kukwira molecular uremu (> 94% crystallinity), yakasimba fibrillation, inoda 380 ° C sintering kuti iite inoenderera yakaoma firimu.

Ichi chinyorwa chinovhara mikana yekushandiswa kweTeflon yakakwirira-tembiricha jira mune inobuda yakasimba-state bhatiri indasitiri. Nharaunda ina: Dry electrode / electrolyte membrane kugadzira - high-temperature anti-stick conveyor mabhandi ekupisa roll pressing (150-250 ° C) zvichiita kuti kupenengura kwakatsetseka kwemafirimu anozvitsigira; inopisa roller inovhara layer semi-permanent anti-stick layer; inochengetedza firimu yakatsetseka pamusoro, inoderedza kukanganisa, inovandudza goho. Kusunungura liners uye cushioning pads yekupisa-kudzvanya densification - sulfide / polymer mabhatiri anoda inopisa isostatic / flat pressing (100-300 ° C, makumi eMPa); PTFE jira rakaiswa pakati pebhatiri stack uye mold inodzivirira kunamatira, inogonesa yunifomu yekumanikidza kugovera kuburikidza ne micro-elasticity, inodzivirira kupisa mahwendefa.