Ngesikhathi sokumbozwa kwetheyiphu ye-PTFE, izinga le-solvent volatilization ye-adhesive ezwela ukucindezela kwe-silicone iyipharamitha yenqubo ebalulekile. Kushesha kakhulu → ukuhlikihlwa kwesikhumba, ukungaleveli kahle, amaphinifa (i-solvent evalelekile), nama-craters (ukujiya noma okubangelwa ukungcola). Iyanensa kakhulu → ukuwohloka, imiphetho ewugqinsi, kanye nokumanzisa ku-PTFE yamandla aphansi. Isu elilungile: ukuvuthwa kancane kwasekuqaleni kokulinganisa nokuphunyuka kwebhamuza, bese kusheshiswa ukomiswa ukuze kubunjwe. Sebenzisa izincibilikisi ezixubile (i-toluene/xylene + ukomisa ngokushesha) nezinga lokushisa likahhavini we-gradient (eliphansi→elimaphakathi→phezulu).

Itheyiphu ye-PTFE yokushisa okuphezulu ilahlekelwa ukunamathela ngemva kokusetshenziswa okuphindaphindiwe ngenxa yokungcoliswa kwendawo (uthuli, uwoyela we-silicone), ukwehluleka kokunamathela okunamathelayo (insalela), noma ukubopha okubuthakathaka kwe-substrate. Izisombululo: i-silicone ye-high-crosslink i-PSA (ukufuduka okuphansi, i-balance tack/amandla okubamba), ukwelashwa kwe-primer ku-PTFE substrate, ukusekelwa kwe-fiberglass ecinene, nokubamba okufanele (indawo ehlanzekile, ikhasi elipholile, i-engeli engu-180°). Ukuhlolwa komthamo kuqinisekisa ukuthuthuka.

Amateyipu e-PTFE okushisa okuphezulu agcinwe efomini lokugoqa angahlushwa ukunamathela kwe-interlayer (ukuvinjwa) kanye nokudluliselwa okunamathelayo ohlangothini olunganamathele. Imbangela: PTFE ifilimu inkumbulo nokunwebeka futhi abicah PSA creep ngaphansi kwengcindezi nokushisa. Isixazululo: I-gradient winding tension - iqinile ezingqimbeni ezingaphandle, iyaxega ezingqimbeni zangaphakathi - kusetshenziswa isilawuli sokuqina sokuqina kwe-loop. Ihambisana nokumbozwa kokukhishwa, isitoreji esifanele (15-40°C, 30-70% RH), ukubekwa okuvundlile, nokuzungezisa ngekota.

Itheyiphu yezinga lokushisa eliphezulu ye-PTFE esetshenziswa ekuthintaneni nokudla kufanele ihloniphe imikhawulo eqinile yezinga lokushisa: ≤260°C ukuze isetshenziswe ngokuqhubekayo (akukho mkhawulo wesikhathi), 260-300°C kufika kumaminithi angu-30 kuphela, futhi >300°C kunqatshelwe. Itheyiphu eyokuthintana nabantu abangaqondile kuphela (ama-tray liners, amakhava okushisa), hhayi ukugoqa ukudla okuqondile. Ungalokothi usebenze ngaphandle komthwalo wokudla (ukushisa okomile). Shintsha uma enamabhamuza, aphuzi, noma agugile.

Izinamathiselo ezizwela ukucindezela kwe-Silicone (PSA) zamateyipu we-PTFE wezinga lokushisa eliphezulu ziyahlukahluka kakhulu ekusebenzeni kokuguga okuphezulu kwezinga lokushisa. I-Methylphenyl silicone PSA igcina >85% amandla ekhasi ngemva kwezinsuku ezingu-250°C/7, kuyilapho uhlobo lwe-methyl olujwayelekile lwehla luye ku-50-70%. Izinhlelo ze-addition-cured (hydrosilylation) zinikeza ukuzinza okungcono kakhulu kunokwelashwa nge-peroxide. Ngesevisi eqhubekayo engu-200°C+, khetha amamaki e-phenyl aphezulu alaphelwe ngokwengezwa.

Amateyipu e-PTFE anamathela ngokushisayo (i-PSA) kufanele aqhube ukushisa ngenkathi enamathela. Ukwengeza ama-filler kuthuthukisa ukuqhutshwa kokushisa kodwa kulimaza ukunamathela. Ibhalansi ekahle isebenzisa izinhlayiya eziyindilinga ezimahhadla (njengohlaka lwamathambo) oluhlanganiswe nezinhlayiya ezinhle (ukugcwalisa izikhala), okugcina isamba silayishwa ngaphezu nje komkhawulo we-percolation. Gwema ama-flakes nama-fibers; babulala i-tack.

Itheyiphu ye-PTFE yokushisa okuphezulu isebenzela imboni ye-PV ngezindima ezimbili ezihlukene: inqubo esebenzisekayo (ivimbela ukunamathela okuchichima kwe-EVA kuma-laminator, imaski ye-solder) kanye nokufakwa kwempilo ende (ukugoqa kwebhasi, ukulungiswa kwebhokisi lokuhlangana). Ngokusetshenziswa kwangaphakathi unomphela, amateyipu kufanele adlule ku-IEC 61215: ukushisa okumanzi okungu-1000-2000h, i-UV, ukuhamba ngebhayisikili okushisayo (-40°C kuya ku-+85°C), ne-silicone PSA kanye nokuncipha kuka-<1%.

Itheyiphu ye-PTFE yokushisa okuphezulu esetshenziswa emimeseni evala ukushisa nemicu yokuvala iletha amanani amane abalulekile: ivimbela ukunamathela kwepulasitiki okuncibilikisiwe (iqeda isikhathi sokuphumula), ivikela ukufa kokuvalwa okumba eqolo, yenza kube lula ukushisa/ingcindezi yezivalo ezingaguquki, futhi inciphisa ukungqubuzana kwefilimu. Kunconywa itheyiphu ye-Fiberglass-backed (0.13-0.25 mm) ene-silicone PSA (≥260°C). I-Anti-static black tape yemigqa enesivinini esikhulu.

Isici sokuvimbela umhwamuko wamanzi wetheyiphu yokunamathisela ye-PTFE sinqunywa ngokuyinhloko ngokulimala kokumboza (ama-micropores, ama-microcracks, ama-fiber wicking) kune-PTFE's intrinsic hydrophobicity. Ifilimu ye-PTFE ehlanzekile inikeza i-WVTR emaphakathi kuphela. I-Multi-layer coating kanye ne-lamellar fillers (i-mica, ama-glass flakes) yenza umphumela we-labyrinth, unciphisa kakhulu ukuhanjiswa komphunga. Ukuze uvale uphawu lomswakama ophezulu, cacisa ama-coatings aminyene.

Ukumelana ne-Creep ye-PTFE high-temperature adhesive tape ngaphansi komthwalo ongaguquki wesikhathi eside (ikakhulukazi ku-200-260 ° C) kunqunywa izici ezimbili: i-silicone PSA crosslink density (i-crosslinking ephakeme ivimbela ukugeleza) kanye nohlobo lwe-substrate (i-fiberglass-reinforced PTFE imelana nokukhasa okubandayo; ifilimu ye-PTFE ehlanzekile iyakhasa). Ingcina engaxhunywanga ihluleka ngokushesha ekushiseni okuphezulu. Izendlalelo zokunamathela eziqinile zandisa ingozi yokukhuphuka.