Nkan yii ṣe alaye awọn ohun elo ti aṣọ gilaasi ti a bo PTFE ni ẹrọ itanna ati ile-iṣẹ itanna. Awọn agbegbe pataki mẹfa: Idabobo iwọn otutu giga ati aabo - motor inter-turn/ Iho / idabobo ipele, idabobo Layer transformer, murasilẹ okun, ipinya ohun elo alapapo ina; Ejò-agbada laminate ati PCB ẹrọ - Tu asọ ni PCB lamination, prepreg ati CCL mimọ conveying; Itanna ẹrọ itanna - ohun boju solder fun igbi / isọdọtun soldering (idaabobo ika ika goolu), awọn beliti gbigbe adiro isọdọtun, awọn maati ibi iṣẹ iṣẹ, awọn ideri aabo ibon afẹfẹ gbona; Cable ati onirin ijanu - ga-otutu USB murasilẹ teepu, gbona apa aso ati fireproof ideri, ooru-isunki ọpọn iwẹ imugboroosi processing conveyor beliti; Anti-aimi ati mimọ yara - cleanroom conveyor beliti ati awọn maati iṣẹ, semikondokito ati Fọtovoltaic ga-otutu gbigbe.

Nkan yii ṣe afihan awọn ọna igbelewọn fun egboogi-sticing ati awọn ohun-ini mimọ-rọrun ti aṣọ gilaasi ti PTFE ti a bo lodi si awọn abawọn epo ati eruku. Awọn ọna pẹlu: Igun olubasọrọ ati idanwo agbara dada — igun olubasọrọ omi ni deede> 110°, igun yiyi 越小越好, agbara dada bojumu 18-20 mN/m; Idanwo peeli ẹrọ - agbara peeli 180 ° pẹlu teepu boṣewa, bojumu <0.1 N/25 mm; Awọn idanwo idawọle epo ti a ṣe afiwe - idoti epo sisun / ọna aloku, ṣiṣe imukuro pipo iwọn lilo iyatọ awọ ΔE wiwọn (kere ΔE = mimọ to dara julọ), ati idanwo asami epo ni iyara (inki inki tọkasi ilodisi to dara); Idanwo eruku-ekuru - ọna gbigbe eruku pẹlu itupalẹ aworan, yiyọ eruku afẹfẹ afẹfẹ wiwọn iyara fifun-pipa ti o kere ju, ati igbelewọn adsorption electrostatic nipasẹ resistivity dada; Igbelewọn agbara - tun ṣe gbogbo awọn idanwo lẹhin ti ogbo iwọn otutu giga (260°C/300°C) tabi abrasion Taber lati rii daju iduroṣinṣin iṣẹ ṣiṣe igba pipẹ.

Nkan yii ni wiwa awọn ohun elo ti Teflon aṣọ otutu otutu (PTFE-coated fiberglass fabric) ni aaye aerospace. Awọn agbegbe ohun elo bọtini: iṣelọpọ ohun elo idapọmọra - itusilẹ asọ / fiimu ni idọti autoclave, awọn ipele ipinya, awọn beliti gbigbe iwọn otutu giga fun iṣelọpọ prepreg; Enjini ati aabo igbona otutu-giga - awọn ibora idabobo igbona, didi ogiriina, awọn asopọ iwọn otutu to rọ; Itanna idabobo ati waya ijanu Idaabobo - USB murasilẹ ni engine compartments ati ibalẹ jia bays; Awọn inu inu ọkọ ofurufu ati aabo ina - awọn aṣọ-ikele ina / awọn idena ẹfin ti o ni ibamu pẹlu awọn iṣedede FST, ibora ibora gbona / akositiki; Awọn aaye ati awọn ohun elo aerospace - awọn apejọ ọpọ-Layer idabobo (MLI), awọn ila-iṣan lubrication anti-tutu-weld fun awọn ilana imuṣiṣẹ ti oorun ati awọn mitari eriali, asọ iṣakoso gbona.

Nkan yii ṣe alaye bii awọn iwe ifowopamosi PTFE ti a bo si sobusitireti aṣọ gilaasi ni asọ otutu otutu Teflon. Isopọpọ kemikali taara ko ṣee ṣe nitori agbara dada ultra-kekere PTFE. Isopọmọra ti waye nipasẹ: Idapọmọra ẹrọ (isopọmọra ti ara) - PTFE emulsion wọ inu awọn ela okun ati awọn idii okun fifẹ lẹhin sisọ; Silane asopo ohun pretreatment - awọn fọọmu molikula Afara laarin inorganic gilasi awọn okun ati Organic alakoko; Layer iyipada alakoko kemikali - lilo PAI, PPS, PES tabi awọn resin PEEK pẹlu micropowder PTFE, ti a lo lẹhin itọju idapọ lati ṣẹda Layer iyipada to lagbara; Gbona-yo alemora film lamination - FEP tabi PFA fiimu (melting ojuami 260-310 ° C) mnu ami-akoso PTFE fiimu to fabric; Ipilẹ-diẹdiwọn nipasẹ ọpọ impregnation ati awọn iyipo sintering - dilute akọkọ kọja pẹlu asopo / asopo pọ jin sinu awọn okun, atẹle nipa PTFE impregnations mimọ, ṣiṣẹda tiwqn gradient lati gilaasi to funfun PTFE.

Nkan yii n ṣalaye bii apẹrẹ igbekalẹ microporous ti Teflon breathable (PTFE) teepu iwọn otutu iwọn otutu ṣe iwọntunwọnsi permeability afẹfẹ pẹlu idabobo ati awọn ohun-ini ti kii-stick. Rogbodiyan mojuto: permeability afẹfẹ nilo awọn pores ṣiṣi, lakoko ti idabobo nbeere iwuwo ati ti kii-igi nilo awọn aaye didan. Awọn ilana apẹrẹ iwọntunwọnsi: iṣakoso iwọn ila opin pore apapọ (0.1-2μm, apere <0.5μm) lati ṣe idiwọ ilọwu yo ati ṣetọju foliteji didenukole; iṣakoso porosity ni 50-70% (≈60% ti o dara julọ) ṣiṣe aṣeyọri Gurley 20-100s / 100cc ati agbara dielectric ≥2kV fun fiimu 0.13mm; gba eto pore nẹtiwọki 3D giga-tortuosity (τ≈2.5-4) lati dinku ni taara-nipasẹ awọn ikanni idasilẹ; òrùka aibaramu gradient pore be pẹlu ipon dada ara Layer (1-5μm) fun ti kii-stick / idabobo ati la kọja inu ilohunsoke fun breathability; Waye Super-oleophobic / hydrophobic dada lẹhin-itọju lai pore blockage.

Nkan yii ṣafihan awọn anfani ti aṣọ otutu otutu PTFE bi media àlẹmọ iwọn otutu giga. Awọn agbara bọtini mẹfa: Idaabobo iwọn otutu ti o tayọ (itẹsiwaju 260 ° C, tente ~ 300 ° C), ti o pọju PPS (190 ° C) ati aramid (200 ° C); Inertness kemikali ti o ga julọ lodi si awọn acids, alkalis, awọn olomi ati awọn oxidants, hydrolysis-sooro, ti o jade aramid ati P84 ni gaasi flue ibajẹ; Iṣẹ ṣiṣe mimọ eruku ti o ga julọ pẹlu agbara dada kekere-kekere ti n mu irọrun yiyọ akara oyinbo eruku ati idaduro titẹ kekere silẹ; Imudara sisẹ ti o dara julọ pẹlu awọn iwọn pore 0.1-3μm yiya lori 99.99% ti awọn patikulu PM2.5; Ti kii-flammability pẹlu LOI loke 95%, pẹlu awọn aṣayan egboogi-aimi ti o wa; Agbara ẹrọ ti o ga lati imuduro fiberglass, pẹlu media fiber PTFE mimọ ti o funni ni irọrun ati> igbesi aye iṣẹ ọdun 4. Ṣe afiwera si PPS, aramid, Nomex, P84 ati media àlẹmọ fiberglass kọja iwọn otutu, resistance kemikali, resistance hydrolysis ati iṣẹ mimọ.

Nkan yii n pese awọn solusan eto fun idilọwọ iyoku alemora ati ẹjẹ alemora nigba lilo teepu iwọn otutu giga PTFE lati daabobo awọn ika ọwọ goolu PCB lakoko apejọ SMT. Itupalẹ okunfa gbongbo: iyoku waye lati ikuna iṣọpọ tabi gbigbe interfacial; ẹjẹ waye lati inu iki iki ati aponsedanu alemora labẹ ooru atunsan. Ojutu mojuto jẹ yiyan teepu to dara: silikoni PSA pẹlu tente igba kukuru ≥300°C, lemọlemọfún ≥260°C, lapapọ sisanra 0.08-0.13mm pẹlu tinrin ga-isokan alemora fẹlẹfẹlẹ, ati egboogi-bleed/ iyokù-free iwe eri. Iṣakoso ilana-igbesẹ mẹfa: mimọ lamination pẹlu IPA; odo-ẹdọfu lamination pẹlu ni kikun air sisilo; profaili iwọn otutu atunsan iṣapeye pẹlu alapapo onírẹlẹ (<2°C/s); peeling tutu ni isalẹ 50 ° C ni igun 180 °; sisẹ lẹsẹkẹsẹ laarin awọn wakati 24 ati lilo ẹyọkan; mimu ikuna pẹlu IPA wiping ati 40-50x magnifier ayewo. Fun awọn PCB ti o ni apa meji, rọpo pẹlu teepu tuntun ṣaaju ṣiṣe sisẹ ẹgbẹ keji.

Nkan yii n pese itọnisọna eto lori idilọwọ awọn wrinkles lori asọ otutu otutu PTFE lakoko sisọ. Wrinkles ti wa ni taa ṣẹlẹ nipasẹ uneven gbona isunki ati aisedede wahala. Awọn ojutu bo iṣan-iṣẹ ni kikun: iṣakoso sobusitireti ohun elo aise (pipe dewaxing / eto ooru lati yọkuro aapọn inu); impregnation ati gbigbe (ọpọ tinrin ti a bo, onírẹlẹ otutu ite, ti nṣiṣe lọwọ rollers); Iṣakoso ileru sintering (1-3% overfeed fun igbanilaaye isunki gbigbona, iṣakoso micro-ẹdọfu ti o ni pipade, isokan otutu iwọn otutu laarin ± 5 ° C, igbi ti iṣaju iṣaju-sintering-itutu agbaiye, awọn ileru afẹfẹ-flotation bi ojutu ti o dara julọ, awọn rollers ti ntan kaakiri); itutu agbaiye ati eto (itutu agba lọra mimu, ṣetọju itankale titi di isalẹ 100 ° C, itutu agbaiye ni kikun ṣaaju ki o to yika); ibojuwo ori ayelujara pẹlu ayewo ina to lagbara ati ọlọjẹ infurarẹẹdi.

Nkan yii ṣe itupalẹ bii iyanrin tabi itọju ipari matt ṣe ni ipa lori eto dada ti asọ iwọn otutu giga PTFE. Awọn ayipada waye ni awọn iwọn mẹta: Mofoloji airi yipada lati didan digi-bi si sojurigindin gully ti o ni inira pẹlu awọn iye Ra / rz ti o pọ si, ṣiṣẹda awọn ẹya ara ẹrọ anchoring 3D fun isọpọ atẹle. Iduroṣinṣin ti a bo dojukọ awọn ewu: PTFE Layer thinning, ifihan agbara ti sobusitireti fiberglass (nfa isonu ti ohun-ini ti kii ṣe igi, ilaluja ọrinrin, ati agbara ẹrọ ti o dinku), pẹlu awọn microcracks ati iran idoti.

Nkan yii ṣafihan ilana ipilẹ ti o pe fun impregnating fiberglass fabric pẹlu emulsion PTFE. Awọn igbesẹ bọtini meje: ① Pretreatment (dewaxing/desizing) ni 350-400°C lati yọ awọn aṣoju wiwọn aṣọ; ② Ilana Emulsion pẹlu 40-55% akoonu ti o lagbara ati awọn surfactants fun imudara wetting; ③ Impregnation nipasẹ ọna dip-squeeze tabi ibora abẹfẹlẹ dokita; ④ Gbigbe ni 100-150 ° C lati rọra yọ omi kuro ki o si ṣe fiimu PTFE ti o gbẹ; ⑤ Sintering ni 360-390 ° C (titi di 400 ° C) lati yo awọn patikulu PTFE sinu fiimu ti o tẹsiwaju; ⑥ Multi-cycle impregnation-gbígbẹ-sintering tun 2-4 igba lati de ọdọ afojusun sisanra ati resini akoonu (45-65%); ⑦ Itọju lẹhin-itọju pẹlu itọju corona, gige eti, yikaka ati ayewo didara. Awọn aaye iṣakoso koko: dewaxing pipe, rirọ emulsion ni kikun, gbigbe mimu mimu, iwọn otutu sintering deede, ati iwuwo bora deede. Awọn ọja sin ga-igbohunsafẹfẹ Ejò-agbada laminates, ga-otutu conveyor beliti ati ayaworan awọn ohun elo awo.