Ichi chinyorwa chinobata 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-yakavharwa nefiberglass jira rinoratidza kusaenzana kwekemikari inertness, ichipikisa zvinenge zvese zvakajairika organic zvinonyungudutsa pasi pezvakajairwa mamiriro ekushanda pasina kuparara, kuzvimba kana kemikari kuita. Zvikamu zvinoshivirira 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 kusingabatike, 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 yakakwirira-tembiricha tepi kusarudzwa kwejekiseni rekugadzira dhizaini 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-kuburitswa 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 zvimiti, 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 yekushushikana kwemagetsi pane izvi zvakasiyana-siyana zvinorema-basa kunyorera.

Panguva yekunyungudika, tFE zvidimbu 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 chekutonhodza chinogadzirisa kukwana kwekristaro: kunonoka kutonhora kunopa crystallinity yakakwirira, spherulites yakakura, kuoma kukuru; kukurumidza kudzima kunopa yakanakisa spherulites uye yakagadziridzwa kuchinjika.

Mucheka unofema zvikuru wePTFE wepamusoro-tembiricha unobatanidza zvinhu zvisina tsvimbo, kugadzikana kwekupisa, uye kupenya kwemhepo. Chinyorwa ichi chinoongorora mashandisirwo ayo akakosha mukuomesa machira, kugadzira chikafu, kugadzirwa kwemusanganiswa, zvemagetsi, pneumatic conveying, kuchengetedza kwezvakatipoteredza, uye zvekuvakisa.

Ichi chinyorwa chinotsanangura kuti sei alkali-isina fiberglass jira riri iro rinofarirwa substrate yePTFE yakakwirira-tembiricha jira. Inovhara kemikari kusungirirwa kuburikidza ne silane coupling agents uye akakosha emuviri zvimiro senge kugadzikana kwemafuta, kugadzikana kwedimensional, uye kuramba kwecorrosion - kuve nechokwadi chekuita kwenguva refu munzvimbo dzakaoma.

Senyanzvi yekugadzira PTFE machira epamusoro-tembiricha, Jiangsu Aokai New Materials inokutora iwe kuti udzidze zvakawanda. Kazhinji, glue yakarapwa uye resin inogona kupepetwa kubva pamucheka wepamusoro wePTFE wepamusoro-tembiricha uye pasina chasara chasara. Zvisinei, chigumisiro ichi hachisi mhedziso. Iwo chaiwo