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 zifite ubuso 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.

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 bwo gupakira, guteka ibiryo, kumisha imyenda, impapuro / gukama firime); guhimba ibishushanyo bisohora imyenda hamwe nigitutu gishyushye cyo kwisiga; 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, byangiza urunigi rwiziritse rwumunyururu lamellae nimbibi zingingo kugirango zishire 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.

Iyi tekinike ngufi ya Jiangsu Aokai isesengura uburyo ubushyuhe bukabije cyangwa bukabije bwangiza PTFE igitambaro cyo hejuru. Gucumura gake gusiga ibice bidashongeshejwe, bigatera micro-pore, guhuza imbaraga-substrate guhuza, hejuru yimiterere, imbaraga zumukanishi, no kugaragara kwamata. Ubushyuhe bukabije butera PTFE kwangirika k'ubushyuhe, kubyara pinholes, ibibyimba, ubukana, ibara ry'umuhondo-umukara, no kurekura imyotsi y'ubumara. Izi ntagondwa zombi zisenya ubwitonzi, imikorere idakomeye, guhinduka, guhindagurika, no guhagarara neza.

Imyenda yubushyuhe bwo hejuru ya PTFE ikomatanya gasketi ihuza imbaraga nyinshi za dielectric (itajegajega munsi yubushuhe), -70 ° C kugeza kuri 260 ° C yubushyuhe bwubushyuhe, kurwanya imiti yisi yose (usibye ibyuma bya alkali byashongeshejwe), hejuru yinkoni (birinda kunyerera), anti-creep (imbaraga za fiberglass imbaraga na PTFE yera), imbaraga zingana cyane, 0 / 0-0. Ugereranije na mika, reberi, hamwe na gaseke ya PTFE isukuye, umwenda wa PTFE utanga ibintu byoroshye guhinduka, gutunganywa, hamwe nigihe kirekire cyo guhagarara. Nibyiza kuri transformateur, moteri ya moteri, gufunga imiti ya flange, nibikoresho bya semiconductor.

Imyenda ya PTFE mugihe cyo gucumura isaba guhagarika neza, ubushyuhe, no kugenzura. Uburyo bwibanze: imashini ya stenter (plaque pin igumana ubugari, irinde kugabanuka kwa weft), ubushyuhe bwikigereranyo (ubushyuhe buhoro → 380-400 ° C gufata → gukonjesha buhoro munsi ya 310 ° C mbere yo kurekura impagarara), substrate yabanje kugabanuka (ikuraho impungenge zo kuboha mbere yo gutwikira), hamwe nuburinganire bwububiko bumwe (birinda gushonga gutandukanye). Kwifata neza bigomba gukomeza kugeza bikonje munsi ya PTFE ya kristu (hafi 310 ° C) kugirango wirinde intambara.

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 yubushyuhe bwo hejuru ya PTFE ikora ibyiciro bine byimpinduka zuburyo uko ubushyuhe buzamuka: munsi ya 260 ° C - gahoro gahoro-guturika no guhindagurika kwinyongera; kuri 327 ° C (gushonga) - kristaline-kuri-amorphous inzibacyuho, gutwikira byoroshe, biva muri fiberglass; 400-500 ° C - PTFE depolymerize (irekura imyuka yubumara), igifuniko kirashira; hejuru ya 500 ° C - fiberglass yoroshya (840 ° C yoroshye) kandi itakaza ubunyangamugayo. Guma munsi ya 260 ° C uhoraho, irinde> 300 ° C impinga kugirango ikore neza.

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 yimyenda yubushyuhe bwo hejuru ivura ubusembwa 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.