Kwambika uburinganire mugihe cya PTFE emulsiyasi yimyenda ya fiberglass nubuzima bwiza bwibicuruzwa. Impamvu zidahwanye zitera: kunanirwa kudakomeye (gukomera ku mwanya muto), intege nke za tekinike (kwibanda ku guhangayika, gutanyagura), guhungabana kw'amashanyarazi (kugabanuka kwa voltage kumanuka kugera kuri 1/10), kwinjira mu miti (kwangirika kwa pinhole), ibibazo bipima (warpage), hamwe no gutunganya inenge (kuzerera umukandara, gutandukanya umubyimba). Igipfundikizo kimwe gisaba kugenzura neza ubwiza bwa emulsiyo, ibirimo bikomeye, impuzu yimyenda, gukuramo icyuho, hamwe na zone nyinshi yumisha / umwirondoro.

Imyenda ya PTFE yubushyuhe bwo hejuru ifite coefficient yo kwagura ubushyuhe (CTE) ya 30-60 ppm / ° C (warp / weft) - hejuru ya fiberglass yonyine ariko iri munsi cyane ya PTFE (100-200 ppm / ° C). PTFE ihinduka muburyo butunguranye (1-2%) kuri 19 ° C na 30 ° C. Kugira ngo wirinde gukomeretsa, gutanyagura, no gusibanganya: ibishushanyo mbonera byo kwaguka ku buntu, irinde guhagarika umutima binyuze mu bushyuhe bw’inzibacyuho, koresha ibyuma byikora byikora ku mukandara wa convoyeur, hanyuma ushyireho igishushanyo mbonera cyo kurwanya. Kugenzura buri gihe imbeho ni ngombwa.

Imyenda yo gutekesha PTFE yubushyuhe bwo hejuru itanga inyungu enye zingenzi: imikorere idakomeye (nta mavuta cyangwa ifu ikenewe, imigati yoroshye irekura neza), ubushyuhe bwagutse (-70 ° C kugeza 260 ° C, umutekano w’itanura kugeza kuri firigo), kongera gukoreshwa (ibihumbi byikiziga, byoroshye koza), ndetse no gutwara ubushyuhe (birinda gutwika, kuringaniza neza). Ibiribwa byo mu rwego rwa FDA byujuje ubuziranenge, biruta impapuro zimpu kandi biruta materi ya silicone hamwe no guhererekanya ubushyuhe bwiza hamwe nubutaka bwiza.

Imyenda ya PTFE yubushyuhe ni ngombwa mu nganda zihuza imyenda. Ibyingenzi byingenzi: imikandara ya convoyeur itagira iherezo kumashini ikomeza guhuza (irinda gushonga gushushe gufatana, kwizirika ku minkanyari), gupfundikira inkoni hamwe nigitambaro cyo gupakira kumashanyarazi ashyushye (kurinda platine kwanduza), umukandara wa convoyeur utudomo twa paste / ifu yipfundikizo mugihe cyo gukama / gushiramo icyuma). Umubyimba uri hagati ya 0.13mm (padi yoroheje) kugeza 0.55mm (imikandara iremereye cyane).

Fiberglass umwenda wo kugabanya ubushyuhe nintandaro yambere ya PTFE kaseti ihindagurika. Ku bushyuhe bwa PTFE (360-400 ° C), impungenge zo kuboha zisigaye. Niba bidakumiriwe, imyenda iragabanuka; niba bikumiriwe, guhangayika byihishe bifunze, bigatera kugabanuka nyuma mugihe cyo gukiza (150-200 ° C) no gushyushya-kurangiza. Igisubizo: koresha fiberglass mbere yubushyuhe hamwe na <0.5% kugabanuka kuri 400 ° C, ukuraho imihangayiko isigaye mbere yo gutwikira.

Imyenda yubushyuhe bwo hejuru ya PTFE (fibre yububiko bwa PTFE) itanga imiti idasanzwe yo kurwanya imiti, hamwe na acide yibanze (harimo na aqua regia), alkalis ikomeye (mubushyuhe bwicyumba), ibishishwa kama, hamwe na okiside. Ibidasanzwe: ibyuma bya alkali byashongeshejwe hamwe nubushyuhe bwo hejuru bwa halogene yibasira PTFE. Kwangirika kwifata byerekana fiberglass kuri acide hydrofluoric na alkalis zishyushye cyane. Ubushyuhe buri hejuru ya 260 ° C bugabanya kurwanya. Kubintu byinshi byimiti, imyenda ya PTFE ikomeza guhagarara neza kandi yizewe.

PTFE emulsiyasi yimyenda ya fiberglass isaba abafasha batandukanye kugirango bagere kumyenda imwe, gufatana gukomeye, hamwe nubuso butagira inenge. Ibintu byingenzi byongeweho harimo: ibikoresho byo guhanagura (kugabanya ubukana bwubutaka, kunoza kwinjira), kubyimbye (kugenzura ububobere nuburemere bwa coating), kugenzura pH (guhagarika emulioni kuri pH 9-10), ibikoresho byo guhuza silane (kongera imbaraga kumirahuri), imfashanyo zikora firime (PFA / FEP yo gucumura), kuzuza imikorere (kwangirika kwangiza) Guhitamo biterwa na substrate nibisabwa.

Igitambaro cyagutse cya fiberglass (igitambara kinini cyane) gitandukanye cyane nigitambara gisanzwe cya fiberglass muburyo bwimyenda. Binyuze mu kirere cyumuvuduko ukabije windege, ibirahuri bikomeza ibirahuri biratandukana, bigahondagurwa, kandi bigahinduka mubudodo bunini, bumeze nkipamba. Ibi birema umwenda mwinshi, woroshye hamwe nubushyuhe bwo hejuru bwumuriro (umuyaga wugarije ikirere), guhuza neza, gushungura neza, no kunoza amarira / flex - kubiciro byimbaraga nkeya. Ikoreshwa kuri gasketi yubushyuhe bwo hejuru, gupfunyika imiyoboro, imifuka yo kuyungurura, hamwe na kashe ya ziko.

Imyenda ya PTFE yubushyuhe bwo hejuru (PTFE isize fiberglass) hafi ya chimique, ariko ibintu bimwe na bimwe bitera kwangirika mubihe byihariye. Igitero cya PTFE kiziguye kibaho hamwe na metero ya alkali yashongeshejwe (sodium, potasiyumu), imiti ikomeye ya fluor (F₂, ClF₃) ku bushyuhe bwinshi, hamwe na alkalis ikomeye yashonga hejuru ya 300 ° C. Kwangirika mu buryo butaziguye bibaho iyo aside hydrofluoric (HF), alkalis ishyushye cyane, cyangwa aside fosifori ishyushye yinjira mu nenge kandi igatera substrate ya fiberglass. Kumurimo ukabije wimiti, koresha firime nziza ya PTFE idafite fiberglass.

Imyenda ya PTFE yubushyuhe bwo hejuru (PTFE isize fiberglass) ifite imbaraga zo guhangana nubushyuhe bwumuriro murwego rusanzwe rukora -70 ° C kugeza 260 ° C. Irashobora kwihanganira umuvuduko ukabije w'amagare, urugero, kuva kuri firigo -50 ° C ukagera kuri 260 ° C. Impamyabumenyi ya premium niyo irokoka ubukonje butunguranye kuva 260 ° C kugeza mumazi 10 ° C. Ariko, gutangaza ibikoresho biturutse ku bushyuhe buri hejuru ya 300 ° C (hafi ya PTFE ya 327 ° C yo gushonga) bizatera guhita bisenyuka. Fiberglass substrate itanga ihame ryimiterere; igifuniko cya PTFE nicyo kintu kigabanya.