Iyi ngingo ikubiyemo imyenda ya Teflon yubushyuhe bwo hejuru (umwenda wa PTFE ushyizweho na fiberglass) mu kirere. Ahantu h'ingenzi hasabwa: Gukora ibikoresho - gusohora imyenda / firime muburyo bwa autoclave, ibice byitaruye, imikandara yubushyuhe bwo hejuru kugirango ikorwe mbere; Moteri hamwe nubushyuhe bwo hejuru bwo kurinda ubushyuhe - ibiringiti byo kubika ubushyuhe, gutwika firewall, guhuza ubushyuhe bworoshye; Gukingira amashanyarazi no kurinda insinga - gupfunyika insinga mu bice bya moteri hamwe n’ibikoresho byo kugwa; Imbere mu ndege no kurinda umuriro - umwenda utwika / inzitizi z'umwotsi zujuje ubuziranenge bwa FST, igitambaro cyo gutwika ubushyuhe / acoustic; Ikoreshwa mu kirere no mu kirere - guteranya ibyiciro byinshi (MLI), inteko zirwanya ubukonje-weld amavuta yo gukoresha imirasire y'izuba hamwe na antenna hinges, igitambaro cyo kugenzura ubushyuhe.

Iyi ngingo isobanura uburyo PTFE itwikiriye imigozi ya fiberglass substrate mu mwenda wo hejuru wa Teflon. Guhuza imiti itaziguye ntibishoboka kubera ingufu za PTFE zidasanzwe. Guhuza bigerwaho binyuze muri: Guhuza imashini (guhuza umubiri) - Emulion ya PTFE yinjira mu cyuho cya fibre hanyuma igafata fibre nyuma yo gucumura; Kwiyubaka kwa Silane - gukora ikiraro cya molekuline hagati ya fibre idafite ibirahuri na primer organic; Imiti ya primer yinzibacyuho - ukoresheje PAI, PPS, PES cyangwa PEEK isigarana na micropowder ya PTFE, ikoreshwa nyuma yo guhuza imiti kugirango habeho urwego rwinzibacyuho rukomeye; Amashanyarazi ashyushye ashyushye - FEP cyangwa PFA (gushonga ingingo 260-310 ° C) inkwano yabanje gukora firime ya PTFE kumyenda; Imiterere ya Gradient ikoresheje uburyo bwinshi bwo gutera akabariro hamwe no kuzunguruka - gusibanganya inzira ya mbere hamwe na binder / guhuza ibikoresho byinjira cyane muri fibre, hanyuma bigakurikirwa no guterwa kwa PTFE, bigakora gradient igizwe kuva fiberglass ikagera kuri PTFE.

Iyi ngingo irerekana uburyo imiterere ya microporome igishushanyo cya Teflon ihumeka (PTFE) kaseti yubushyuhe bwo hejuru iringaniza imyuka ihumeka hamwe nubushakashatsi hamwe nibidafite inkoni. Amakimbirane yibanze: umwuka wogusaba bisaba imyenge ifunguye, mugihe insulasiyo isaba ubucucike naho kutaba inkoni bisaba ubuso bworoshye. Ingamba zishushanyije: kugenzura impuzandengo ya pore diameter (0.1-2μm, nibyiza <0.5μm) kugirango wirinde gushonga no gukomeza voltage yameneka; kugenzura ububobere kuri 50-70% (≈60% optimal) kugera kuri Gurley 20-100s / 100cc nimbaraga za dielectric ≥2kV kuri firime 0.13mm; fata imiyoboro ihanitse ya 3D imiyoboro ya pore (τ≈2.5-4) kugirango uhagarike imiyoboro inyuramo; kubaka imiterere ya asimmetric gradient pore ifite uruhu rwuzuye rwuruhu (1-5μm) kubutari inkoni / insulasiyo hamwe nimbere imbere kugirango ihumeke; koresha super-oleophobic / hydrophobic hejuru yubutaka nyuma yo kuvurwa nta pore ifunze.

Iyi ngingo itanga ibisubizo byuzuye muburyo bwo gukumira ibisigazwa bifata hamwe no kuva amaraso yumuti mugihe ukoresheje kaseti ya PTFE yubushyuhe bwo hejuru kugirango urinde intoki za zahabu PCB mugihe cyo guterana kwa SMT. Isesengura ry'imizi: ibisigara bibaho biturutse ku kunanirwa gufatanya cyangwa kwimura intera; kuva amaraso bibaho biturutse ku kugabanuka kwijimye no gufatira hejuru yubushyuhe. Igisubizo cyibanze ni uguhitamo kaseti ikwiye: silicone PSA ifite impinga yigihe gito ≥300 ° C, ikomeza ≥260 ° C, uburebure bwuzuye 0.08-0.13mm hamwe nudusimba twinshi twa cohesion adhesive, hamwe nicyemezo cyo kurwanya amaraso / ibisigisigi. Igenzura ryintambwe esheshatu: gusukura mbere ya lamination hamwe na IPA; zero-tension lamination hamwe no guhumeka ikirere cyuzuye; uburyo bwiza bwo kwerekana ubushyuhe hamwe n'ubushyuhe bworoheje (<2 ° C / s); gukonjesha gukonje munsi ya 50 ° C kuri 180 °; guhita gutunganya mumasaha 24 no gukoresha rimwe gusa; kunanirwa gukemura hamwe no guhanagura IPA no kugenzura magnifier 40-50x. Kubice bibiri PCBs, usimbuze kaseti nshya mbere yo gutunganya uruhande rwa kabiri.

Iyi ngingo itanga ubuyobozi bufatika bwo kwirinda inkari ku mwenda wo hejuru wa PTFE mugihe cyo gucumura. Iminkanyari iterwa ahanini no kugabanuka k'ubushyuhe hamwe no guhangayika bidahuye. Ibisubizo bikubiyemo ibikorwa byuzuye: kugenzura ibikoresho fatizo kugenzura (dewaxing / ubushyuhe bwuzuye kugirango ukureho imihangayiko y'imbere); gutera akabariro no gukama (impuzu nyinshi zoroshye, ubushyuhe bworoheje buhoro buhoro, imashini ikora); kugenzura itanura (1-3% birenze urugero kumafaranga yo kugabanya ubushyuhe bwumuriro, gufunga-gufunga micro-tension kugenzura, guhuza ubushyuhe buringaniye muri ± 5 ° C, buhoro buhoro preheating-sintering-gukonjesha umurongo, itanura ryumuyaga nkibisubizo byiza, ibizunguruka bikwirakwiza); gukonjesha no gushiraho (buhoro buhoro gukonjesha, komeza gukwirakwira kugeza munsi ya 100 ° C, gukonjesha kwuzuye mbere yo kuzunguruka); gukurikirana kumurongo hamwe nubugenzuzi bukomeye bwumucyo hamwe na scan ya infragre.

Iyi ngingo ikubiyemo igipimo cyo gukonjesha mugihe cya PTFE yubushyuhe bwo hejuru. Nyuma yo gucumura kuri 380-400 ° C, umwenda ugomba guhita unyura muri 310-315 ° C ya kristu. Igipimo cyo gukonjesha gisabwa nibura 30-50 ° C / min (umwenda muto urashobora kugera kuri 100-200 ° C / min ukoresheje gukonjesha ikirere). Gukonjesha byihuse (kuzimya) bitanga ububobere buke (45-50%), butanga impuzu zoroshye, zikomeye hamwe nubuso bworoshye, gufatana gukomeye, gukora neza kutari inkoni, no kurwanya gusiba no guturika. Gukonjesha gahoro (gukonjesha itanura) bivamo kristu nyinshi (60-70%), bigatera impuzu zikomeye, zoroshye zoroshye kugabanuka, gukuramo na microcrack.

Iyi ngingo igereranya icyumba-ubushyuhe nubushyuhe bwo hejuru bwo gukura kwa silicone yumuvuduko ukabije wa kaseti ya PTFE. Gukura k'ubushyuhe bwo hejuru (120-180 ° C) bituma habaho imiyoboro ihuza imiyoboro ifite imbaraga zifatika, ikarinda ibisigazwa bifata nyuma yo kuyikuramo. Ikora imiti ihuza imiti hamwe na PTFE ikoresheje primer co-curing, ikuraho ingaruka zo gusiba. Gukura k'ubushyuhe bwo hejuru kandi bikuraho imbaraga za molekile nkeya mbere yo kubyara, birinda amavuta menshi ya silicone mugihe cyo gushyushya bwa mbere.

Aka gatabo karimo PTFE yubushyuhe bwo hejuru bwo gutoranya kaseti yo gutera inshinge no kurwanya anti-stick. Guhitamo bishingiye ku bushyuhe: 60260 ° C kuri plastiki rusange (kaseti ya silicone isanzwe ya PSA, 0.13-0.18mm); 260-300 ° C kuri plastiki yubushyuhe bwo hejuru yubushakashatsi nka PC, PA66, POM (yometse hejuru ya tempic silicone, 0.18-0.25mm); 300-400 ° C kuri PEEK, LCP, PPS hafi yiruka ashyushye (kaseti ifata birananirana; koresha umwenda wa PTFE udafite amavuta cyangwa firime ya PFA). Guhitamo bishingiye ku bikoresho: ibikoresho byoroshye bikenera-kurekura hejuru ya PTFE yuzuye; ibirahuri / minerval yuzuye ibikoresho bisaba uburemere-0.25mm + kaseti idashobora kwambara; inyongeramusaruro yangiza isaba imiti irwanya imiti hamwe nubutaka bwuzuye; porogaramu ihamye-ikenera anti-static umukara PTFE kaseti.

Imyenda myinshi ya PTFE yubushyuhe bwo hejuru ikozwe mugusiga PTFE kumyenda ikomeye ya fiberglass, itanga imbaraga zingana, kurwanya ubushyuhe, ibintu bidafite inkoni, kurwanya imiti, hamwe no guterana amagambo. Ibyingenzi byingenzi birimo: gutanga inganda (gupakira ubushyuhe, gupakira ibiryo, kumisha imyenda, impapuro / gukama firime); guhimba ibishushanyo bisohora imyenda hamwe no gukanda bishyushye; gusudira imyenda ikingira hamwe namakoti yo kubika ubushyuhe; moteri y'amashanyarazi na insimburangingo; kubaka ibyuma bitembera hamwe n'inkunga y'umuyoboro; gushungura imiti hamwe na valve bifunga ibidukikije byangirika. Imbaraga zingana zituma umuntu aramba mugihe cyo guhagarika umutima, kurira, guhindagurika inshuro nyinshi, hamwe nubushyuhe bwo hejuru bwubushyuhe bwo hejuru murwego rwo hejuru rukomeye.

Mugihe cyo gucumura, ibice bya PTFE kumyenda ya fiberglass bishonga hejuru ya 327 ° C, bigasenya umwimerere wafunzwe-urunigi lamellae nimbibi zingana kugirango bibe amorphous. Iyo imaze gukonja, PTFE yongeye kwisubiramo muri spherulite igizwe na lamellae yerekanwe na radiyo, hamwe na kristu ya 50-70%. Igipimo cyo gukonjesha kigena gutunganirwa neza: gukonjesha buhoro bitanga kristu nyinshi, spherulite nini, ubukana bwinshi; kuzimya byihuse bitanga spherulite nziza kandi byoroshye guhinduka.