Itheyiphu ye-PTFE yepayipi lamakhemikhali/isitsha sokunqanda ukugqwala, ukungagxili, nokuvikelwa kokuvala kudinga i-substrate ehambisanayo, isistimu yokunamathela, kanye nemidiya yamakhemikhali. I-Silicone PSA inconywa ku-200-260 ° C ngama-acids / alkali; I-acrylic PSA imelana nezinyibilikisi eziphilayo kodwa ikhawulela izinga lokushisa libe ngu-≤150°C. Ku-HF, ukubilisa >80% alkali, noma i-chlorine trifluoride, sebenzisa i-PTFE-only lining (akukho okunamathelayo okuphilayo). Okubalulekile: i-adhesive iyisixhumanisi esibuthakathaka, hhayi i-PTFE ngokwayo.

Itheyiphu ye-PTFE yobubanzi obubanzi bezinga lokushisa idinga i-silicone PSA egcina ukunamathela ukusuka -70°C kuya ku-260°C. Izakhi eziyinhloko zokuklama: ungqimba lwenguquko olunama-primer-anchored (lugwema i-delamination), i-sea-island microstructure (i-MQ resin Islands + i-polysiloxane isigaba esiqhubekayo), i-gradient crosslinking (ungqimba olungaphakathi olunomthamo omkhulu wokumelana nokukhasa, ungqimba lwangaphandle olunobukhulu obuphansi bokudonswa kwezinga lokushisa eliphansi), kanye nezigcwali ezizinzile ze-oxid oxide (i-oxid oxide). Amasegimenti e-phenyl-modified siloxane acindezela i-crystallization yezinga lokushisa eliphansi, evumela ukuguquguquka okungaphansi -100°C.

Isakhiwo sobuso esisikiwe se-PTFE itheyiphu yokushisa okuphezulu sithinta ngokuqondile ukunamathela okunamathelayo nokuphakamisa unqenqema ngesikhathi sokufaka isicelo. Ukusika okungalungile (izindwani ezibuthuntu, i-engeli engafanele) kudala imicu yeglue, kwenze kube mncane ungqimba olunamathelayo olusemaphethelweni, futhi kuveza obala ama-fiberglass burrs - okuholela ekuphumeni, ekuhlanganisweni okubuthakathaka, nasekuphakamiseni ngaphansi kokushisa noma ukushuba. Ubuso obungajwayelekile bokuphela (okunamagagasi, obuphumela ngaphandle) bubangela ukusakazwa kwengcindezi engalingani, ukushayela okunamathelayo kukhase ngesikhathi sokulondoloza. Ubuso obufanele ekugcineni bushelelezi, buyashesha, futhi abunamonakalo - busebenza njengesivalo esikhiya okunamathelayo futhi siqinisekise ukubopha okugcwele emaphethelweni.

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 (ukuvimbela) kanye nokudluliselwa okunamathelayo ohlangothini olunganamathela. Imbangela: PTFE ifilimu inkumbulo nokunwebeka futhi abicah PSA creep ngaphansi kwengcindezi nokushisa. Isixazululo: I-gradient winding tension - iqine ezingqimbeni ezingaphandle, ixege 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-fillers kuthuthukisa i-thermal conductivity 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%.