Iyo yakachekwa yekupedzisira kumeso chimiro chePTFE yakakwira-tembiricha tepi inokanganisa zvakananga kunama kuyerera uye kusimudza kumucheto panguva yekushandisa. Kutsemura kusina kunaka (mablades akagomara, kona isina kufanira) kunogadzira glue filaments, kutetepa kumucheto kwenamira layer, uye kunofumura mabhura efiberglass - zvichitungamira mukuyerera, kusimba kusungirirana, uye kusimudza mukupisa kana kunetsana. Zviso zvisina kujairika zviso (wavy, protruding) zvinokonzeresa kusaenzana kwekudzvanywa, kutyaira kunamira kunokwira panguva yekuchengetedza. Iyo yakanakira magumo chiso yakatsetseka, inotsvedza, uye isina kukuvara - ichiita sechisimbiso chinokiya chinonamira uye chinova nechokwadi chese kumucheto kusungirirwa.

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 ine yakanakisa munyu kupfapfaidza kuramba, asi iyo isina simba mapoinzi ndiyo inonamira layer uye fiberglass substrate mipendero. Nzira dzekuongorora: 1000h neutral salt spray (NSS) bvunzo, kuyera peel simba retention (≥80% inodiwa), urema hwekuona (kusimudza, blistering), uye simbi substrate corrosion. Kunzvimbo dzemugungwa uye dzakakwirira-munyu-mhute: shandisa silicone PSA (kwete acrylic), yakanyudzwa zvizere PTFE substrate, chisimbiso mipendero nemamiriro ekunze-resistant sealant, uye shandisa primer panzvimbo dzesimbi.

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 tepi yakachengetwa pasi pemamiriro akatarwa (10-25 ° C, 40-70% RH, kure neUV / heavy pressure) ine mararamiro esherufu emwedzi 3-6 (makirasi ekutanga kusvika kumwedzi gumi nemiviri). Key degradation zvikumbaridzo: simba repeel harifanire kudonha pasi pe70% yekutanga kukosha; hapana masara ekunamatira mushure mekubviswa kwekushisa kwepamusoro; hapana carbonization kana kutsemuka pane yakatarwa tembiricha. Macheki anokurumidza: manyore kusunungura kunzwa, 260 ° C yasara bvunzo, uye lamination shrinkage bvunzo.

Yakakungurutswa PTFE tepi inogona kugadzira interlayer adhesion (kuvharira) uye adhesive kutamisa panguva yekuchengetedza kwenguva refu. Zvinokonzera: PTFE firimu elastic memory uye silicone PSA inokambaira pasi pekumanikidza / kupisa. Kudzivirirwa: gradient winding tension (yekunze yakamanikana, yemukati yakasununguka) panguva yekugadzira, pamwe nekuburitsa coating padivi risinganamire. Chengetedza pa -15 ° C kusvika 40 ° C, 30-70% RH, yakatwasuka pamaracks, tenderera rolls per quarterly. Kune akakora adhesive mamakisi, wedzera kuburitsa bepa pakati pematanho.

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.