Chinyorwa ichi chinosuma iyo yakakwana yekutanga maitiro ekupfekedza jira refiberglass nePTFE emulsion. Matanho manomwe akakosha: ① Pretreatment (dewaxing/desizing) pa350-400°C kubvisa machira ekuisa saizi; ② Emulsion formulation ine 40-55% yakasimba yemukati uye ma surfactants ekuvandudza weti; ③ Impregnation kuburikidza nedhip-kusvina nzira kana chiremba blade coating; ④ Kuomesa pa 100-150 ° C kuti zvinyoro zvinyorove mvura uye uite yakaoma PTFE firimu; ⑤ Sintering pa 360-390 ° C (kusvika 400 ° C) kunyungudutsa PTFE zvimedu kuita firimu rinoenderera; ⑥ Multi-cycle impregnation-drying-sintering inodzokororwa 2-4 nguva kusvika kune chinangwa chakakora uye resin content (45-65%); ⑦ Kurapwa mushure mekurapa kunosanganisira kurapwa kwekorona, kuchekerera kwemupendero, kumonereka uye kuongororwa kwemhando. Core control point: dewaxing yakazara, yakazara emulsion wetting, zvishoma nezvishoma kuomeswa, chaiyo sintering tembiricha, uye inowirirana coating density. Zvigadzirwa zvinoshandisa high-frequency copper-clad laminates, high-temperature conveyor mabhandi uye architectural membrane zvinhu.

Ichi chinyorwa chinovhara core performance indicators yePTFE high-temperature tepi inoshandiswa muvacuum coating, vacuum heat treatment uye nharaunda dzakafanana. Zvinodiwa zvakakosha zvinosiyana zvakanyanya nekushandiswa kwemuchadenga: kubuda kunze kunonyanya kukosha (TML≤1%, CVCM≤0.1%; aerospace / optical mamakisi anoda TML≤0.5%, CVCM≤0.01%); tembiricha kuramba kunofanira kusimbiswa kune ese ari maviri PTFE substrate (260 ° C) uye adhesive layer; yakanyatsocheneswa yakaderera-outgassing silicone PSA inodiwa kudzivirira siloxane kusvibiswa; high-temperature inobata simba inodzivirira kukambaira uye kusimudza kumucheto; utsanana hunoda kusabvisa fiber uye pasi ionic content; anti-static tepi (pamusoro resistivity 10⁶-10⁹ Ω/sq) inodzivirira ESD kukuvara; plasma kuramba kunofanirwa kuongororwa kune sputtering / PECVD maitiro; thermal shrinkage pazasi 2% inovimbisa masking chaiyo.

Ichi chinyorwa chinozivisa organic solvents iyo PTFE yakakwirira-tembiricha jira inogona kumira. PTFE-yakavharidzirwa fiberglass jira rinoratidza kusaenzana kwekemikari inertness, ichipikisa zvinenge zvese zvakajairika organic zvinonyungudutsa pasi pemamiriro ekushanda akajairwa pasina kuparara, kuzvimba kana kemikari kuita. Zvikamu zvinoshivirika zvinosanganisira: doro (methanol, ethanol, isopropanol), ketoni (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (peturu, toluene, xylene, hexane), halogenated hydrocarbons (dichloromethylene), carbon dioxide, tether. THF), organic acids (glacial acetic acid, formic acid), amines uye amides (triethylamine, DMF), phenols, uye zvimwe zvakaita secarbon disulfide, pyridine, silicone mafuta uye brake fluid.

Ichi chinyorwa chinobata kutonhora chiyero zvinodiwa panguva yePTFE yakakwirira-tembiricha jira sintering. Mushure mekupisa pa 380-400 ° C, jira rinofanira kukurumidza kupfuura nepakati pe 310-315 ° C crystallization-sensitive zone. Inokurudzirwa kutonhora chiyero ingangoita 30-50 ° C / min (jira rakatetepa rinogona kuwana 100-200 ° C / min kuburikidza nemhepo kutonhora). Kukurumidza kutonhora (kudzima) kunogadzira yakaderera crystallinity (45-50%), ichiburitsa yakapfava, yakaoma machira ane nzvimbo yakatsetseka, kunamatira kwakasimba, kuita kwakanakisa kusiri tsvimbo, uye kuramba delamination uye kuputika. Kunonoka kutonhora (kutonhora kwechoto) kunoguma nehupamhi hwekristaro (60-70%), zvichikonzera kuomarara, brittle coatings inowanzoita shrinkage, peeling uye microcracks.

Ichi chinyorwa chinofananidza kamuri-tembiricha uye yakakwirira-tembiricha maturation yesilicone pressure-sensitive adhesive yePTFE tepi. High-temperature maturation (120-180 ° C) inogadzira dense crosslinked network ine simba rakasimba rakabatana, kudzivirira zvakasara zvakanamatira mushure mekusvuura. Iyo inoumba makemikari anchoring zvisungo nePTFE substrates kuburikidza ne primer co-kurapa, kubvisa delamination njodzi. High-temperature maturation inobvisawo low-molecular volatiles isati yasununguka, kudzivirira kuputika uye kusvibiswa kwesilicone mafuta panguva yekutanga kupisa.

Iri gwara rinovhara PTFE yakakwira-tembiricha tepi kusarudzwa kwejekiseni kuumba kudhonzwa uye anti-stick application. Kusarudzwa kwekushisa-based: ≤260 ° C kune mapurasitiki akawanda (standard silicone PSA tape, 0.13-0.18mm); 260-300 ° C yepamusoro-tembiricha engineering mapurasitiki sePC, PA66, POM (yakakwirira-temp silicone adhesive, 0.18-0.25mm); 300-400 ° C yePEEK, LCP, PPS pedyo nevamhanyi vanopisa (tepi yekunamatira inokundikana; shandisa jira risina pepa rePTFE kana PFA firimu). Material-based sarudzo: tacky zvinhu zvinoda yakakwirira-kuburitsa yakachena PTFE nzvimbo; girazi/mineral yakazadzwa zvinhu zvinoda inorema-basa 0.25mm+ kupfeka-resistant tepi; corrosive additives inoda makemikari anonamira uye dense substrate; static-sensitive applications inoda anti-static black PTFE tepi.

Mucheka wepamusoro wePTFE wepamusoro-tembiricha unogadzirwa nekuputira PTFE pane yakakwirira-simba refiberglass jira, rinopa simba rakasimba, kusapisa kupisa, kusanamatira zvivakwa, makemikari kuramba, uye kuderera kwakaderera. Zvishandiso zvakakosha zvinosanganisira: kufambiswa kweindasitiri (kupisa kupisa kudikitira, kubika chikafu, machira ekuomesa, mapepa/kuomesa firimu); composite molding kuburitsa jira uye inopisa yekutsikisa cushion liners; welding ekudzivirira maketeni uye thermal insulation jackets; motokari yemagetsi uye transformer insulation; kuvaka mabhengi ekutsvedza uye zvitsigiro zvepombi; kemikari kusefa uye kuvhara vharafu munzvimbo dzinoora. Yakakwira tensile simba inovimbisa kusimba pasi pekunetsekana, kubvaruka, kudzokororwa kuchinjika, uye yakakwirira-tembiricha yemagetsi kushushikana mukati meaya akasiyana anorema-basa maapplication.

Panguva yekunyunguduka, PTFE zvimedu pajira refiberglass zvinonyunguduka pamusoro pe327°C, zvichiparadza cheni yakapetwa-cheni lamellae uye miganhu kuti iite amorphous kunyungudika. Pakutonhora, PTFE inodzokorora kuita spherulites inoumbwa neradially oriented lamellae, ine crystallinity inotangira 50-70%. Chiyero chekutonhora chinogadzirisa kukwana kwekristaro: kunonoka kutonhora kunobereka crystallinity yakakwirira, spherulites yakakura, kuoma kukuru; kukurumidza kudzima kunopa yakanakisa spherulites uye yakagadziridzwa kuchinjika.

PTFE-yakavharidzirwa fiberglass jira rinoshandiswa zvakanyanya mukugadzira rabha nekuda kwekupisa kwayo, isiri-tsvimbo pfuma, uye yakaderera friction. Zvishandiso zvakakosha zvinosanganisira: kuburitsa liner dzeplate/vacuum vulcanization uye kuumba matayi; mabhandi ekutakura asina tsvimbo ezvigayo zvakavhurika, makarenda, uye mitsetse yekutonhodza; jira rinopindirana rekuchengetedza semi-yakapedza rubber; kunyanya kubata silicone uye fluororubber; uye matireyi ovheni ekuti apedze kupora. Mabhenefiti anosanganisira kubvisa mold adhesion, kudzikisa kuburitsa mumiriri kushandiswa, kudzivirira kuputira roller, uye kuve nechokwadi chekudhirowa kwakanaka.

Low sintering inosiya PTFE isina kunyungudika, zvichikonzera micro-pores, kusanamatira zvakanaka, nzvimbo dzakashata, simba remagetsi rakaderera, uye kutaridzika kwemukaka. Kupisa zvakanyanya kunokanganisa PTFE, kuburitsa mapinho, maturu, brittleness, yero-kusvika-dema ruvara, uye muchetura utsi. Ose ari maviri anoparadza compactness, isiri-tsvimbo kuita, kuchinjika, insulation, uye dimensional kugadzikana. Optimal range 370–400°C inobereka semi-transparent, smooth, tan coating. Cheki chekuona: matte white = pasi-sintered; yellow/brittle = over-sintered. (296 mavara)