Nkhaniyi ikuyang'ana zotsatira za kugwedezeka kwa intaneti panthawi ya Teflon yotentha kwambiri ya tepi pa PTFE gawo lapansi la flatness ndi zomatira zofanana. Zotsatira pa kutsetsereka kwa gawo lapansi: kukanikiza kopitilira malire zotanuka kumapangitsa kuti pulasitiki ikhale yotambasuka ndi makongono osasinthika (kutalika kwakutali, kupendekeka kopingasa), kupanga kufooka, makwinya ndi mawonekedwe a wavy; PTFE imalowa pansi pa kukanidwa kosalekeza kumakhala 'kuzizira' pambuyo pozizira, kuchititsa kusamvana pamwamba; Kukangana kosiyana kosiyana kochokera ku kusafanana kwa ma roller kumapangitsa m'mbali zopindika, matuza apakati, komanso malekezero anthawi ndi nthawi.

Nkhaniyi ikuyang'ana kusintha kwapangidwe mu nsalu za PTFE zotentha kwambiri panthawi ya ukalamba. Zinayi: PTFE ❖ kuyanika microstructure - molecular unyolo scission ndi makutidwe ndi okosijeni (carbonyl/carboxyl gulu mapangidwe), crystallinity kusintha (kunyamuka koyambirira kenako kugwa), yaying'ono mng'alu ndi pinhole mapangidwe, pamwamba ufa; Galasi CHIKWANGWANI gawo lapansi ndi mawonekedwe - kusang'ana/kulumikiza wothandizila kuchititsa kuwonongeka kwa zomangira, kugwirizana pakati pa nkhope ndi delamination (matuza, malo oyera), kukokoloka kwa ukonde wa magalasi ndi kusungunula, mpweya wa alkali chitsulo okusayidi womwe umayambitsa kupsinjika; Maonekedwe a macroscopic - kusintha kwa mtundu (woyera → beige → bulauni → wakuda), mapindikidwe opindika ndi kupindika, kukwiyitsa pamwamba ndi gloss kutayika, kukhala ufa ukakhudza, kutaya kwathunthu kusinthasintha. Mkhalidwe wa ukalamba: njira yopita patsogolo ya 'kuwonongeka kwa zokutira → kulephera kwa mawonekedwe → kuwonongeka kwa gawo lapansi.'

Nkhaniyi ikufotokoza mmene kulamulira sintering nthawi PTFE mkulu-kutentha nsalu. Kore control njira: mzere liwiro kusintha. Sintering nthawi = chigawo chotenthetsera chogwira ntchito kutalika ÷ liwiro la kuyenda kwa nsalu. Kutentha kokwanira kwa sintering ndi 350 ° C (pamwambapa kutentha kumawerengedwa ngati nthawi ya sintering). Kugawa kwa kutentha kwamitundu yambiri: kutentha (100-250 ° C), sintering (360-395 ° C), kutentha kwapamwamba (380-390 ° C), kuzizira (pansi pa 300 ° C). Nthawi zolozera pa 380-390 ° C: opepuka (0.08-0.13mm) masekondi 30-60; muyezo (0.18-0.25mm) 1.5-3 mphindi; kulemera (≥0.35mm) 3-5 mphindi. Chizindikiritso ndi kusintha: pansi-sintering (mphamvu yotsika, kukhetsa ufa, ming'alu yaying'ono) → kuchepetsa liwiro kukulitsa nthawi; kutentha mopitirira muyeso (chikasu, kuphulika, utsi woyera) → onjezerani liwiro kuti mufupikitse malo okhala. Kufanana kwa nthawi ya kutentha kumalola kutentha kwambiri (395-405 ° C, masekondi) kapena kutsika pang'onopang'ono (360-375 ° C, 5-8 mphindi).

Nkhaniyi ikufotokoza chitsanzo cha kusintha kwa mgwirizano mphamvu ya PTFE mkulu-kutentha tepi zomatira wosanjikiza pambuyo kukalamba kutentha. Mawonekedwe a magawo atatu: Pambuyo pochiritsa kukwera siteji (kutentha koyambirira kwa kutentha kwa 200-260 ° C, magulu otsalira otsalira akupitirizabe kuphatikizika, kugwirizana kumawonjezeka kwambiri); Gawo lokhazikika lokhazikika (njira zolumikizirana zimatsirizika, mgwirizano umakhalabe wokhazikika kwa nthawi yayitali); Kuwonongeka ndi kutsika siteji (nthawi yochulukirapo / kutentha kumayambitsa kuwonongeka kwakukulu kwa unyolo, mgwirizano umachepetsa, zomatira zimafewetsa ndikukhala zovuta). Zomwe zimayambitsa kulephera kwa mgwirizano (zotsalira zamkati zong'ambika) ndi kufinya (kuzizira kochokera m'mbali chifukwa cha kuchepa kwa modulus) zimawunikidwa.

Nkhaniyi ikufotokoza za ntchito ya nsalu ya Teflon yotentha kwambiri pamakampani amagetsi adzuwa. Kugwiritsa ntchito kwambiri mu module lamination: kutulutsa nsalu yoyikidwa pamwamba / pansi pa ma PV modules kumalepheretsa EVA yosungunuka (140-150 ° C) kuti asamamatire ndi mbale zotenthetsera kapena mbale ya mphira, kuteteza zipangizo ndi kuonetsetsa kuti pali malo osalala; malamba onyamula laminator kuti azitsitsa / kutsitsa; Nsalu zodzitchinjiriza za rabara zomwe zimakulitsa moyo wautumiki. Ma cell stringer soldering: malamba onyamula ma cell ndi riboni kudzera m'malo otenthetsera, okhala ndi malo osasunthika omwe amakana kutulutsa ndi ma solder splashes; Kutenthetsa nsanja cushioni kwa soldering workstations. Kutentha kwapamwamba: kukulunga kwa machubu otentha, ma thermocouples, zingwe mu laminator ndi ma uvuni ochiritsira; zida zotchingira matenthedwe makatani ndi zishango.

Nkhaniyi chimakwirira masitepe pretreatment chofunika kwa fiberglass nsalu pamaso PTFE emulsion impregnation. Khwerero 1: Kutenthetsa kutentha/kutsuka phula pa 300-450°C kuchotsa sera ya parafini ndi mafuta onse pamwamba (parafini sera, zotumphukira za wowuma), zotsalira zotsala zofunika kuchepera pa 0.2%, kupanga 'nsalu yothira phula.' Gawo 2: Mankhwala opangira mankhwala apamtunda - kupaka silane,KH-50 couping,KH-50 KH-50 A-174) kupanga filimu yolumikizana ndi mankhwala pamtunda, ndikupangitsa mlatho wa molekyulu pakati pa ulusi wagalasi ndi organic PTFE; Nsalu zomwe zidagulitsidwa kale zitha kudumpha izi koma ziyenera kutsimikiziridwa. Khwerero 3: Kuyanika ndi kutentha kusanayambe - kuyanika pa 80-120 ° C kwa maola 1-2 kuti muchepetse chinyezi pansi pa 0.1%, kupewa kupangika kwa thovu / zopanda kanthu pochiritsa.

Nkhaniyi ikupereka njira zowonjezerera kukana ndi kukhazikika kwa nthawi yayitali kwa tepi ya Teflon yotentha kwambiri. Njira zikuphatikizapo: Kukhathamiritsa kwa ma molekyulu a ma netiweki - high MQ silicone resin / chingamu chiŵerengero (1.2: 1–2: 1) imapanga madera okhwima olimba; kuphatikizidwa kwa magulu a phenyl (20-30 mol%) kumalepheretsa kuyenda kwa unyolo; crosslink molecular kulemera kulamulidwa pa 5,000-15,000 g / mol; Gradient modulus multilayer zomatira dongosolo - woyamba-anangula wosanjikiza (1-3μm) ndi silane lumikiza wothandizila, mkulu-modulus cohesive wosanjikiza (30-50μm) monga kukameta ubweya zosagwira mafupa, viscoelastic zinchito wosanjikiza (3-8μm) kwa pamwamba kunyowetsa; Nanofillers - silika woyaka (10-25 wt%) wokhala ndi kusinthika kwapamtunda kumapangitsa kulumikizana kosinthika.

Nkhaniyi ikuyang'ana kusintha kwapangidwe kwa nsalu ya PTFE-yakutidwa ndi fiberglass m'malo owononga kwambiri. Kupaka kwa PTFE kumakhala kokhazikika pama media ambiri (kuphatikiza aqua regia, ma acid acids, zosungunulira za organic) - unyolo wa maselo amakhalabe osasinthika. Kupatulapo: zitsulo zosungunuka za alkali zimatulutsa fluorine zomwe zimayambitsa carbonization (bulauni / wakuda, wonyezimira); amphamvu fluorinating agents (F₂, ClF₃) kuswa mpweya mpweya msana; zosungunulira zina zamtundu wa Freon zimayambitsa kutupa; otentha ndende oxidizing zidulo pang'onopang'ono kuyambitsa magulu polar pamwamba.

Nkhaniyi ikufotokoza za kagwiritsidwe ntchito ka nsalu za PTFE-zokutidwa ndi fiberglass pamagetsi ndi zamagetsi. Madera akuluakulu asanu ndi limodzi: Kutentha kwapamwamba ndi chitetezo - kutsekemera kwa injini / kagawo / gawo, kutsekemera kwa transformer wosanjikiza, kuzimata koyilo, kudzipatula kwa zipangizo zamagetsi zamagetsi; Copper-clad laminate ndi PCB kupanga - kumasula nsalu mu PCB lamination, prepreg ndi CCL woyera kutumiza; Electronic soldering - masking solder for wave/reflow soldering (kuteteza chala cha golide), malamba otumiziranso ng'anjo yamoto, mphasa zogwirira ntchito, zotchingira zoteteza mfuti zamoto; Chingwe ndi zomangira mawaya - tepi yokulunga yotentha kwambiri, manja otentha ndi zovundikira zosayaka moto, malamba otumizira machubu otenthetsera kutentha kwambiri; Anti-static and cleanroom - malamba otumizira oyeretsa ndi mateti ogwirira ntchito, semiconductor ndi photovoltaic kutentha kwambiri.

Nkhaniyi ikupereka njira zowunikira zotsutsana ndi zomatira komanso zotsuka mosavuta za nsalu za PTFE zokutidwa ndi fiberglass motsutsana ndi madontho amafuta ndi fumbi. Njira zikuphatikizapo: Kuyesa kwapang'onopang'ono komanso kuyesa mphamvu - madzi okhudzana ndi madzi nthawi zambiri > 110 °, ngodya yozungulira 越小越好, mphamvu ya pamwamba 18-20 mN/m; Kuyesa kwa peel yamakina - 180 ° mphamvu ya peel yokhala ndi tepi yokhazikika, yabwino <0.1 N/25 mm; Kuyesa kukana kwa mafuta - njira yotsalira ya mafuta, kupukuta kochulukira pogwiritsa ntchito kusiyana kwa mitundu ΔE muyeso (yaing'ono ΔE = kuyeretsa bwino), ndi kuyesa chizindikiro cha mafuta mwamsanga (kuchepa kwa inki kumasonyeza bwino kutsutsa); Kuyesa kolimbana ndi fumbi - njira yokhazikitsira fumbi ndi kusanthula kwazithunzi, kuchotsa fumbi lakuyenda kwa mpweya kuyeza kuthamanga kwapang'onopang'ono, ndikuwunika kwa electrostatic adsorption kudzera pa resistivity pamwamba; Kuunikira kulimba — bwerezani zoyeserera zonse mukakalamba kwambiri (260°C/300°C) kapena abrasion ya Taber kuti mutsimikizire kukhazikika kwa magwiridwe antchito kwanthawi yayitali.