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.

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.

Ichi chipfupi chehunyanzvi kubva kuJiangsu Aokai chinoongorora kuti tembiricha yakadzikira zvakanyanya kana yakakwira sintering inokuvadza sei PTFE jira rekushisa. Low sintering inosiya zvimedu zvisina kunyungudutswa, zvichikonzera micro-pores, isina kusimba coating-substrate bonding, hutsinye hwepamusoro, husina simba hwemagetsi, uye kutaridzika kwemukaka. Kupisa kwakanyanya kunokonzeresa PTFE kushatisa kwemafuta, kuburitsa mapinhole, mabubbles, brittleness, yero-kune-dema discoloration, uye kuburitsa muchetura utsi. Zvese zviri zviviri zvakanyanyisa zvinoparadza compactness, kwete-tsvimbo kuita, kuchinjika, insulation, uye dimensional kugadzikana.

PTFE high-temperature jira insulating gaskets inobatanidza simba guru re dielectric (yakagadzikana pasi pehunyoro), -70 ° C kusvika 260 ° C tembiricha yakasiyana, universal chemical resistance (kunze kwesimbi alkali yakanyungudutswa), kwete-stick surface (inodzivirira creepage), anti-creep (fiberglass reinforcement vs. friction μ-501), high ten μ-50. V-0 murazvo chiyero. Kuenzaniswa ne mica, rabha, uye yakachena PTFE gaskets, PTFE jira rinopa kuchinjika kwepamusoro, kurongeka, uye kwenguva refu dimensional kugadzikana. Yakanakira ma transformer, mota insulation, kemikari flange yekuisa chisimbiso, uye semiconductor midziyo.

PTFE jira flatness panguva sintering inoda chaiyo tension, tembiricha, uye kuzvidzora kudzora. Nzira dzepakati: stenter machine (mapini epini anochengetedza upamhi, kudzivirira weft shrinkage), gradient tembiricha profile (inononoka kupisa → 380-400 ° C bata → inononoka kutonhora pazasi 310 ° C isati yaburitsa tension), pre-shrunk substrate (inobvisa kuruka kushushikana isati yapfekedzwa), uye yunifomu yekupfeka ukobvu (inodzivirira kunyungudika kwakasiyana). Stenter kuzvidzora kunofanirwa kuchengetedzwa kusvika kutonhora pasi pePTFE crystallization point (approx. 310 ° C) kudzivirira warpage.

Kupfekedza kufanana panguva yePTFE emulsion impregnation ye fiberglass jira ndiyo nzira yehupenyu yemhando yechigadzirwa. Kusaenzana kupfekedza kunokonzera: kutadza kwetsvimbo (kunamira panzvimbo dzakatetepa), kushaya simba kwemuchina (kunetsekana, kubvaruka), kusagadzikana kwemagetsi (kuparara kwemagetsi kunodonha kusvika 1/10), kupinda kwekemikari (pinhole corrosion), nyaya dzedimensional (warpage), uye kukanganisa kwekugadzirisa (bhandi kudzungaira, kusiyana kwakakora). Uniform coating inoda kunyatso kudzora emulsion viscosity, yakasimba yemukati, machira kudhonzerana, kusvina mapundu, uye akawanda-zone drying / sintering profiles.

PTFE high-temperature jira inopinda matanho mana ekushanduka kwemaitiro sezvo tembiricha inokwira: pasi pe260 ° C - inononoka micro-cracking uye residual additive volatilization; pa 327 ° C (kunyunguduka) - crystalline-to-amorphous shanduko, kupfeka kunonyorovesa, kunopera kubva kune fiberglass; 400-500 ° C - PTFE depolymerizes (inosunungura magasi ane chepfu), kuvhara kunopera; pamusoro pe500 ° C - fiberglass inopfava (840 ° C inonyorovesa nzvimbo) uye inorasikirwa nekuvimbika kwechimiro. Ramba uri pasi pe260°C uchienderera, dzivirira >300°C peaks kuti ushande zvakachengeteka.

PTFE high-temperature jira inogadzirwa kuburikidza ne-single-dip impregnation (imwe pass: inokurumidza, yakaderera-mutengo, yakaonda yakapfava, yakaoma pamusoro ine pinholes) kana yakawanda-dip impregnation (2-3+ inopfuura: yakatsetseka, dense, pinhole-isina coating, PTFE yemukati 50-70%, premium performance, mutengo wakakwira). Single-dip inokodzera yakaderera-giredhi gaskets, mameti echinguvana, uye zvinhu zvinofema. Multi-dip inodiwa kune chikafu-giredhi yekubikira mashiti, asiri-tsvimbo conveyor mabhandi, high-frequency circuit substrates, makemikari liner, uye architectural membranes.

PTFE yakakwirira-tembiricha jira pamusoro kurapwa inotyora kemikari inertness ye bonding/kudhinda. Nzira ina: kemikari etching (sodium-naphthalene, simba repamusoro 20→ 40-50 dyn/cm, rima risingaperi, micro-porous structure), kurapwa kweplasma (nano-roughening, kushanda kweboka rekubatanidza, hwindo pfupi rinoshanda), corona kurapwa (mutete-firimu, kuparara kwekukurumidza, kudzika zvishoma), uye laser kurapwa (chaiyo micro-pattering, controlled carbonization). Nzira dzese dzinoita roughen mumuviri uye nemakemikari dzinounza mapoka epolar (C=O, -OH, -COOH) kuti akwanise kunamira kubatana.