Chidule chaukadaulo ichi chochokera ku Jiangsu Aokai chikuwunika momwe kutentha kotsika kwambiri kapena kutentha kwambiri kumawonongera nsalu ya PTFE yotentha kwambiri. Low sintering masamba particles osasungunuka, kuchititsa micro-pores, ofooka ❖ kuyanika-gawo lapansi mgwirizano, zaukali pamalo, osauka makina mphamvu, ndi yamkaka opaque maonekedwe. Kutentha kwambiri kumapangitsa kuti PTFE iwonongeke, imapanga mapini, thovu, brittleness, kusinthika kwachikasu ndi wakuda, ndi kutulutsa utsi wapoizoni. Zonsezi zimawononga kulimba, kusagwira ntchito, kusinthasintha, kusungunula, ndi kukhazikika kwa dimensional.

PTFE high-temperature nsalu insulating gaskets kuphatikiza mkulu dielectric mphamvu (khola pansi chinyezi), -70 °C kwa 260 °C kutentha osiyanasiyana, chilengedwe mankhwala kukana (kupatula zitsulo za alkali wosungunuka), non-ndodo pamwamba (amaletsa creepage), anti-creep (fiberglass reinforcement vs. koyera PTFE, μ=01), mkulu tensi (50 .01) . Mtengo wa V-0. Poyerekeza ndi mica, mphira, ndi ma gaskets oyera a PTFE, nsalu ya PTFE imapereka kusinthasintha kwapamwamba, kusinthika, komanso kukhazikika kwanthawi yayitali. Zoyenera ma thiransifoma, kutchinjiriza kwa mota, kusindikiza ma flange amankhwala, ndi zida za semiconductor.

Mitengo ya emulsion ya PTFE imakhudzidwa ndi zinthu zonse zamafakitale. Mtengo wokwera (migodi ya fluorite, ma R22 refrigerant quotas) amakhazikitsa mtengo woyambira. Kufuna kwapansi kwa mabatire a lithiamu ndizomwe zimayendetsa kukula. Zinthu zomwe zimaperekedwa (mitengo yoyendetsera mafakitale, kukonza mbewu) ndi mtundu wazinthu (zolimba, kukula kwa tinthu, kalasi yoyera) zimapanga magawo amitengo. Malamulo azachilengedwe (PFOA/PFAS zoletsa) amakweza mtengo wotsatira. Logistics (zoyendera zozizira) zimawonjezera ndalama zambiri. Mayendedwe amitengo amatsata mfundo yayikulu: mtengo wa fluorite/hydrofluoric acid = pansi; kufunikira kwa batri yatsopano yamphamvu = mayendedwe; mitengo ya ntchito ndi ndondomeko = zoyambitsa kusakhazikika kwakanthawi kochepa.

PTFE tepi ya mankhwala chitoliro/chiwiya odana ndi dzimbiri, osati ndodo, ndi kusindikiza chitetezo amafuna kufananitsa gawo lapansi, dongosolo zomatira, ndi mankhwala media. Silicone PSA ikulimbikitsidwa 200-260 ° C ndi zidulo / alkalis; acrylic PSA imalimbana ndi zosungunulira za organic koma imachepetsa kutentha mpaka ≤150°C. Pa HF, kuwira > 80% alkali, kapena chlorine trifluoride, gwiritsani ntchito PTFE-only lining (palibe zomatira organic). Zovuta: zomatira ndiye ulalo wofooka kwambiri, osati PTFE yokha.

PTFE nsalu flatness pa sintering amafuna ndendende mavuto, kutentha, ndi kudziletsa. Njira zazikuluzikulu: makina a stenter (mbale za pini zimasunga m'lifupi, zimateteza kuchepa kwa weft), mbiri ya kutentha kwa gradient (kutentha kwapang'onopang'ono → 380-400 ° C kugwira → kuziziritsa pang'onopang'ono pansi pa 310 ° C musanatulutse kukangana), gawo lapansi lomwe lisanadulidwe (kuchotsa kupsinjika kwa kuluka musanakutidwe), ndi makulidwe a yunifolomu ❖ kuyanika (kuletsa kusungunuka kwa kusiyana). Kuletsa kwamphamvu kuyenera kusungidwa mpaka kuzizirira pansi pa PTFE crystallization point (pafupifupi 310 ° C) kuti muteteze tsamba lankhondo.

Kuphimba mofanana pa PTFE emulsion impregnation wa fiberglass nsalu ndi njira ya moyo wa mankhwala khalidwe. Zosafanana zokutira zimayambitsa: kulephera kwa ndodo (kumamatira pa malo oonda), kufooka kwamakina (kupsinjika kwamalingaliro, kung'ambika), kusakhazikika kwamagetsi (kuwonongeka kwamagetsi kumatsikira mpaka 1/10), kulowa kwamankhwala (kuwonongeka kwa pinhole), zovuta zamtundu (warpage), ndi zolakwika pakukonza (kuzungulira kwa lamba, kusiyanasiyana kwa makulidwe). Kupaka yunifolomu kumafuna kuwongolera bwino kwa kukhuthala kwa emulsion, kulimba kolimba, kukangana kwa nsalu, mipata yofinya, ndi mbiri yowumitsa zone / sintering.

Mphamvu ya tepi ya PTFE imapangidwa bwino kudzera pakuyala ndi kukhathamiritsa kwa njira yochiritsa. ❖ kuyanika: zoyambira wosanjikiza (0.5-2μm silane primer kupewa zomatira peeling), zomatira makulidwe 30-60μm (mulingo woyenera kwambiri akugwira mphamvu), zingalowe defoaming, ndi 5-10μm kusefera. Kuchiza: Kutentha kwapang'onopang'ono (80-100 ° C kuchotsa zosungunulira → 120-140 ° C kuumba → 150-220 ° C deep crosslinking), post-curing (40-60 ° C kwa 24-48h kuti mupumule kupsinjika maganizo), ndi kutsika kwapakati kuti muteteze kupsyinjika kwamkati kuchokera ku kuchepa kwa gawo lapansi. The poyambirira ndi zofunika PTFE a otsika pamwamba mphamvu.

Nsalu ya PTFE yotentha kwambiri imakhala ndi magawo anayi a kusintha kwapangidwe pamene kutentha kumakwera: pansi pa 260 ° C - pang'onopang'ono kung'amba pang'onopang'ono ndi kuwonjezereka kotsalira kowonjezera; pa 327 ° C (malo osungunuka) - kusintha kwa crystalline-to-amorphous, kupaka kumafewetsa, kumadetsedwa kuchokera ku fiberglass; 400-500 ° C - PTFE depolymerizes (imatulutsa mpweya wapoizoni), zokutira zimatha; pamwamba pa 500 ° C - fiberglass imafewetsa (840 ° C kufewetsa malo) ndipo imataya kukhulupirika kwadongosolo. Khalani pansi pa 260°C mosalekeza, pewani nsonga>300°C kuti mugwire ntchito motetezeka.

Nsalu yotentha kwambiri ya PTFE imapangidwa kudzera mumiyezo imodzi yokha (chiphaso chimodzi: chofulumira, chotsika mtengo, chophikira chopyapyala, cholimba chokhala ndi mapini) kapena kulowetsedwa kwamitundu yambiri (2-3+ kudutsa: zosalala, zowuma, zokutira zopanda pinhole, PTFE zili 50-70%, magwiridwe antchito apamwamba, okwera mtengo). Dip imodzi imagwirizana ndi ma gaskets otsika, mateti osakhalitsa, ndi zinthu zopumira. Ma dip ambiri amafunikira pamapepala ophikira zakudya, malamba onyamula osamata, magawo ozungulira othamanga kwambiri, ma liner a mankhwala, ndi nembanemba zamamangidwe.

PTFE pamwamba kutentha nsalu pamwamba mankhwala amaswa inertness mankhwala kwa kugwirizana/kusindikiza. Njira zinayi: etching mankhwala (sodium-naphthalene, pamwamba mphamvu 20→ 40-50 dyn/cm, wosanjikiza mdima wokhazikika, micro-porous structure), mankhwala a plasma (nano-roughening, ntchito gulu Ankalumikiza, lalifupi yogwira zenera), corona mankhwala (woonda-filimu, mofulumira kuwola, pang'ono kuya), ndi laser mankhwala (molondola yaying'ono-patterning, controlled carbonization). Njira zonse zimakhala zowawa ndikuyambitsa magulu a polar (C=O, -OH, -COOH) kuti athe kumamatira.