Yakakura-tembiricha-yakasiyana-siyana PTFE tepi inoda silicone PSA inochengetedza kunamatira kubva -70°C kusvika 260°C. Makiyi ekugadzira zvinhu: primer-anchored transition layer (inodzivirira delamination), sea-island microstructure (MQ resin zvitsuwa + polysiloxane inoenderera nhanho), gradient crosslinking (yakakwirira-density yemukati layer yezvinokambaira, yakaderera-density yekunze layer kune yakaderera-temp tack), uye kupisa-yakagadzikana mafiritsi (cerium oxide). Phenyl-modified siloxane segments inodzvinyirira yakaderera-tembiricha crystallization, ichigonesa kuchinjika pazasi -100°C.

Munguva yePTFE tepi yekuputira, iyo inonyungudutsa volatilization mwero wesilicone pressure-sensitive adhesive ndiyo yakakosha process parameter. Kunyanya kukurumidza → kukwenya pamusoro, kusaenzana zvakanaka, mapini (akavharirwa solvent), uye craters (condensation kana contaminant-induced). Kunyanya kunonoka → kuderera, makobvu macheto, uye kunyorova pane yakaderera-pamusoro-simba PTFE. Iro zano rakakodzera: kunonoka kwekutanga kuvhuvhuta kwekuenzanisa uye kupukunyuka kwebubble, wobva wawedzera kuomesa kuumbwa. Shandisa zvinonyungudutsa zvakasanganiswa (toluene/xylene + kukurumidza kuomesa) uye tembiricha yehovhoni yegradient (yakaderera → yepakati → yakakwirira).

PTFE high-temperature tepi inorasikirwa nekunamatira mushure mekushandisa kakawanda nekuda kwekusvibiswa kwepamusoro (guruva, silicone mafuta), kusungirirwa kwakabatana kukundikana (kusara), kana kusimba kwe substrate bonding. Mhinduro: high-crosslink silicone PSA (yakaderera kutama, kuenzanisa tack / kubata simba), primer treatment paPTFE substrate, dense fiberglass backing, uye kubata kwakakodzera (nzvimbo dzakachena, ganda rinotonhorera, 180 ° angle). Quantitative test inosimbisa kuvandudzwa.

PTFE high-temperature matepi akachengetwa ari roll form anogona kutambura kubva interlayer adhesion (kuvharira) uye adhesive kutamisa kune isiri-tsvimbo divi. Midzi inokonzeresa: PTFE firimu elastic memory uye silicone PSA inokambaira pasi pekumanikidzwa uye kupisa. Solution: gradient winding tension - yakasimba pamatanda ekunze, yakasununguka pazvikamu zvemukati - uchishandisa yakavharwa-loop tension control. Inopindirana nekuvhara kwekuburitsa, kuchengetedza kwakaringana (15-40 ° C, 30-70% RH), kuiswa kwakachinjika, uye kutenderera kwekota.

PTFE high-temperature tepi inoshandiswa mukubata chikafu inofanira kuremekedza miganhu yetembiricha yakasimba: ≤260 ° C kuti irambe ichishandiswa (hapana muganhu wenguva), 260-300 ° C kusvika kumaminitsi makumi matatu chete, uye > 300 ° C inorambidzwa. Iyo tepi ndeyekubata zvisina kunanga chete (tray liners, heat sealer inovhara), kwete yakananga yekuputira chikafu. Usamboshanda pasina mutoro wekudya (dry heat). Tsiva kana yakatsvuka, yakatsvuka, kana yakasakara.

Silicone pressure-sensitive adhesives (PSA) yePTFE high-temperature matepi anosiyana zvakanyanya mukuchembera kwakanyanya. Methylphenyl silicone PSA inochengetedza > 85% peel simba mushure me250 ° C / 7 mazuva, nepo standard methyl mhando inodonha kusvika 50-70%. Kuwedzera-kuporeswa (hydrosilylation) masisitimu anopa kugadzikana kuri nani pane peroksidi-yakarapwa. Nekuenderera mberi kwe200°C+ sevhisi, sarudza magiredhi ekuwedzera-akarapwa epamusoro-phenyl.

Thermally conductive PTFE pressure-sensitive adhesive (PSA) matepi anofanira kuitisa kupisa achiramba akanamatira. Kuwedzera mafirita kunonatsiridza kupisa conductivity asi kunokanganisa kunamatira. Optimal balance inoshandisa spherical coarse particles (se conductive skeleton) yakasanganiswa neakanaka zvimedu (kuzadza voids), ichichengeta yakazara mafirita kurodha pamusoro pechikumbaridzo chepercolation. Dzivisa flakes uye fibers; vanouraya simbi.

PTFE high-temperature tepi inoshandira PV indasitiri mumabasa maviri akasiyana: process consumable (inodzivirira EVA kufashukira adhesion pane laminators, solder mask) uye refu-hupenyu insulation (kuputira bhasi, junction bhokisi fixation). Nechigarire kushandiswa kwemukati, matepi anofanira kupfuura IEC 61215: 1000-2000h yakanyorova kupisa, UV, thermal cycling (-40 ° C kusvika + 85 ° C), ine silicone PSA uye shrinkage <1%.

PTFE high-temperature tepi inoiswa kune kupisa-sealing mapanga uye sealing strips inopa mana anokosha adhesion: inodzivirira yakanyungudutswa yepurasitiki adhesion (inobvisa downtime), inodzivirira inodhura yekuisa chisimbiso inofa, homogenizes kupisa / kudzvanywa kwezvisimbiso zvinowirirana, uye inoderedza kukwesha kwefirimu. Fiberglass-backed tape (0.13-0.25 mm) ine silicone PSA (≥260 ° C) inokurudzirwa. Anti-static nhema tepi yemitsetse inomhanya-mhanya.

The water vapour barrier property yePTFE adhesive tepi inotariswa zvakanyanya nekukoira (micropores, microcracks, fiber wicking) pane PTFE's intrinsic hydrophobicity. Yakachena PTFE firimu inopa chete yepakati WVTR. Multi-layer coating uye lamellar fillers (mica, girazi flakes) inogadzira labyrinth mhedzisiro, inoderedza zvakanyanya kutapurirana kwemhute. Kuti uvhare hunyoro hwepamusoro, tsanangura densified coatings.