Imyenda ya PTFE yubushyuhe bwo hejuru ikorwa hifashishijwe gutera inshuro imwe (pass imwe: yihuta, igiciro gito, igifuniko cyoroshye, hejuru yikinini hamwe na pinholes) cyangwa gutera inshuro nyinshi (2-3 + passes: yoroshye, yuzuye, ipine idafite pinhole, ibirimo PTFE 50-70%, imikorere yambere, igiciro kinini). Kwibiza-umwe bikwiranye gasketi yo mu rwego rwo hasi, matelo yigihe gito, nibikoresho bihumeka. Multi-dip irakenewe kumpapuro zo gutekesha ibyokurya, imikandara ya convoyeur idafite inkoni, insimburangingo yumuzunguruko mwinshi, imirongo yimiti, hamwe nubwubatsi.

PTFE yubushyuhe bwo hejuru yubushyuhe bwo kuvura bica ubudahangarwa bwimiti yo guhuza / gucapa. Uburyo bune: gufata imiti (sodium-naphthalene, ingufu zubutaka 20 → 40-50 dyn / cm, igicucu cyijimye gihoraho, imiterere ya micro-porous), kuvura plasma (nano-roughening, gukora amatsinda akora, idirishya rigufi), kuvura corona (firime yoroheje, kubora vuba, ubujyakuzimu buke), no kuvura lazeri (micro-patterning, kugenzura karubone). Uburyo bwose bwakomanze kumubiri no muburyo bwa shimi butangiza amatsinda ya polar (C = O, -OH, -COOH) kugirango ashoboze guhuza.

Ibikoresho bitanduye ni ishingiro ryibanze rya PTFE yubushyuhe bwo hejuru. Umwanda (abatangiriyeho ibisigisigi, surfactants, ion ibyuma, ibikoresho byanduye byanduye) bitera kwangirika kwubushyuhe bwigihe kitaragera (ibibyimba, guhuha hejuru ya 260 ° C), hejuru yumutambiko udafite inkoni (ingingo zifatika), kugabanya amashanyarazi (gutakaza dielectric, voltage yamenetse hasi), imbaraga zumukanishi (guhangayikishwa no guhagarika umutima). Ibikoresho fatizo bifite isuku nyinshi byemeza FDA yubahiriza, kuramba, gukora cyane PTFE.

PTFE yometseho fibre yububiko bwa fibre ikenera igihe cyo gufata neza kuri 370-400 ° C. Itanura rihoraho: 30-90s (inanutse) kugeza 3-5 + min (umubyimba). Amatanura yuzuye: 5-15 min. Kutarenza-gucumura bitera impuzu zidasobanutse neza; kurenza urugero bitera umuhondo, ubunebwe, hamwe na gaze ya fluor ya toxic. Gukoresha uburyo bwiza: koresha ubushyuhe bwamashyiga, ukore igenzura ryerekanwa (igice-kibonerana, cyoroshye), kandi ukore ibizamini byo gukurura kaseti. Buri gihe urebe neza ko ubushyuhe bwuzuye bwuzuye.

Imyenda ya PTFE yubushyuhe bwo hejuru isaba gufata neza kugirango umutekano urambe. Icyitonderwa cyingenzi: ntuzigere urenga 260 ° C (hejuru ya 320 ° C irekura imyotsi yuburozi), irinde ibishishwa bikarishye (gutwikiriye ibice, byerekana fiberglass), ntugire isuku ikabije (ubwoya bwibyuma byangiza ubuso butari inkoni), kubika ububiko bwagutse bwumuriro (birinda gushwanyagurika), kandi bigasimburwa mugihe byavunitse cyangwa bikonje. Ububiko bwazungurutse, kure ya UV. Wambare uturindantoki twangiza ubushyuhe mugihe cyo gukora.

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).

Imyenda irwanya static ya PTFE igerwaho hakoreshejwe uburyo bubiri bwingenzi: gutwikira doping (kuvanga ibyuzuza ibintu nka karuboni yumukara muri emulioni ya PTFE, gukora umuyoboro wa percolation kuri concentration ikomeye) hamwe no kuboha insimburangingo (gushyiramo fibre ikora mumyenda ya fiberglass). Kurwanya ubuso bigenzurwa kuri 10⁵ - 10⁹ Ω. Ihame: shiraho inzira iyobora itwara ibicuruzwa bihagaze ako kanya, birinda kwirundanya kwangiza. Impamvu ni itegeko kubikorwa byiza.

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.