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 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.

Raw material kuchena ndiyo hwaro hwakakosha hwePTFE yakakwirira-tembiricha machira mhando. Kusachena (zvakasara zvekutanga, ma surfactants, maion simbi, macontainated sizeng agents) anokonzera kushatisa nguva isati yakwana (mafuru, kuturuka kupfuura 260°C), kusaenzana kusiri kwetsvimbo (adhesion anchor points), kuderedzwa kwemagetsi ekuisa (dielectric loss, low breakdown voltage), kuderera kwesimba remagetsi (stressing yero/stress). Yakakwirira-kuchena mbishi zvinhu inovimbisa FDA-inoenderana, hupenyu hurefu, yakakwirira-inoshanda PTFE jira.

PTFE-yakavharwa nefiberglass jira sintering inoda chaiyo kubata nguva pa370-400°C. Mavhiri anoenderera mberi: 30-90s (yakaonda) kusvika 3-5+ min (yakakora). Batch furnaces: 5-15 min. Under-sintering inokonzera opaque, rough coatings kuti peel; kunyanya-sintering kunokonzera kutsvuka, brittleness, uye muchetura fluoride gasi kusunungurwa. Maitiro ekugonesa: shandisa tembiricha yekutevera tembiricha, ita yekutarisa yekuona (semi-pachena, inochinjika), uye ita tepi kudhonza bvunzo. Nguva dzose iva nechokwadi chekuzara-kuzara kwekushisa kufanana.

PTFE high-temperature jira inoda kungwarira kubata kuti ive nechokwadi chekuchengetedza uye hupenyu hurefu. Chengetedzo yakakosha: usambopfuura 260°C (pamusoro pe320°C inoburitsa utsi hune muchetura), dzivirira kutsemuka (pakatsemuka kuvharwa, kufumura fiberglass), hapana kuchenesa (simbi inokuvadza nzvimbo isina tsvimbo), chengetedza kupisa kwekuwedzera clearance (inodzivirira kubvaruka), uye kutsiva kana yaputika kana kusvunurwa. Chitoro chakakungurutswa, kure neUV. Pfeka magirovhosi anodzivirira kupisa panguva yekubata.

PTFE high-temperature jira ine coefficient of thermal expansion (CTE) ye 30-60 ppm/°C (warp/weft) - yakakwirira kudarika fiberglass chete asi yakaderera zvikuru pane yakachena PTFE (100-200 ppm/°C). PTFE inongoerekana yachinja vhoriyamu (1-2%) pa19°C uye 30°C shanduko yechikamu. Kuti udzivise kuputika, kubvarura, uye delamination: dhizaini yedhizaini yekuwedzera mahara, dzivirira kushushikana kuburikidza nechikamu chekuchinja tembiricha, shandisa otomatiki tensioner pamabhandi ekutakura, uye shandisa anti-buckling overlap dhizaini. Kugara uchiongorora kutonhora kuyerera kwakakosha.

PTFE high-temperature machira ekubikisa mabheti anopa mana akakosha mabhenefiti: kusashanda kwetsvimbo (hapana mafuta kana hupfu hunodiwa, mabheki akapfava anoburitswa zvakachena), tembiricha yakakura (-70 ° C kusvika 260 ° C, yakachengeteka muhovhoni kusvika mufiriji), kushandiswazve (zviuru zvemajini, zviri nyore kuchenesa), uye kunyange kupisa conduction (kunodzivirira kupisa, kudzikamisa brown). Chikafu-giredhi FDA inoenderana, ivo vanobuda kunze bepa rematehwe uye kupfuura e-silicone mats ane zvirinani kutamisa kupisa uye kunaka kwepamusoro magadzirirwo.