Ensengeka ya ffeesi y’enkomerero esaliddwa eya PTFE ey’ebbugumu eringi ekosa butereevu okukulukuta kw’okusiiga n’okusitula ku mbiriizi mu kiseera ky’okusiiga. Okusala obubi (ebiso ebizibu, enkoona etali ntuufu) kuleeta ebiwuzi bya kalaamu, kugonza oluwuzi olusiiga ku mabbali, n’okubikkula ebiwujjo bya fiberglass – ekivaako okukulukuta, okukwatagana okunafu, n’okusitula wansi w’ebbugumu oba okusika omuguwa. Feesi z’enkomerero ezitali za bulijjo (amayengo, ezifuluma) zireeta okusaasaana kwa puleesa okutali kwenkanankana, okuvuga okuseeyeeya kw’okusiiga mu kiseera ky’okutereka. Feesi y’enkomerero ennungi ebeera nnyonjo, efuumuuka, era teyonoona – ekola nga seal esiba ekyesiiga n’okukakasa okukwatagana mu bujjuvu.

Mu kiseera ky’okusiiga ttaapu ya PTFE, omuwendo gw’okuwunya kw’ekizimbulukusa (solvent volatilization rate) gwa silicone pressure-sensitive adhesive is a critical process parameter. Mangu nnyo → okuzimba olususu ku ngulu, okutereera obubi, ebituli bya ppini (ekizimbulukusa ekikwatiddwa), n’ebinnya (okufuumuuka oba okuleetebwa obucaafu). Mpola nnyo → okugwa, empenda enzito, n’okuggyamu amazzi ku PTFE ey’amasoboza amatono ku ngulu. Enkola ennungi: okufuumuuka empola okusooka okusobola oku leveling n’okutoloka mu bubble, olwo okukala amangu okusobola okubumba. Kozesa ebizimbulukusa ebitabuddwa (toluene/xylene + okukala amangu) n’ebbugumu lya oven erya gradient (low→medium→high).

PTFE high-temperature tape erina okuziyiza okufuuyira omunnyo okulungi ennyo, naye ebinafu ye adhesive layer ne fiberglass substrate edges. Enkola z’okwekenneenya: okugezesa 1000h neutral salt spray (NSS), okupima okusigala kw’amaanyi g’ebikuta (≥80% kyetaagisa), obulema mu kulaba (okusitula, okuzimba ebizimba), n’okukulukuta kw’ekyuma wansi. Ku mbeera z’ennyanja n’ez’omunnyo omungi: kozesa silicone PSA (si acrylic), PTFE substrate efumbiddwa mu bujjuvu, ssinga ku mbiriizi n’ekiziyiza embeera y’obudde, era osiige primer ku byuma.

PTFE tape ya bbugumu eringi efiirwa okunywerera oluvannyuma lw’okugikozesa enfunda eziwera olw’obucaafu obw’okungulu (enfuufu, amafuta ga silikoni), okulemererwa kw’okukwatagana kw’okusiiga (ebisigadde), oba okusiba kwa substrate okunafu. Ebigonjoolwa: high-crosslink silicone PSA (okusenguka okutono, balanced tack/holding power), okujjanjaba primer ku PTFE substrate, dense fiberglass backing, n’okukwata obulungi (okuyonja kungulu, cool peel, 180° angle). Okukebera mu bungi kukakasa okulongoosa.

Teepu ya PTFE ey’ebbugumu eringi eterekeddwa mu mbeera eziragiddwa (10-25°C, 40-70% RH, ewala okuva ku UV/puleesa enzito) erina obulamu obw’omutindo obw’okutereka emyezi 3-6 (ebigezo ebya waggulu okutuuka ku myezi 12). Ebikulu ebipima okuvunda: amaanyi g’okusekula tegalina kukka wansi wa 70% ku muwendo ogwasooka; tewali bisigalira bya kwesiiga oluvannyuma lw’okuggyawo ku bbugumu eringi; tewali kaboni oba enjatika ku bbugumu erigereddwa. Okukebera amangu: okuwulira okusumulula mu ngalo, okugezesa ebisigadde ku 260°C, n’okugezesa okukendeera kwa lamination.

Rolled PTFE tape esobola okukulaakulanya interlayer adhesion (blocking) n’okutambuza adhesive mu kiseera ky’okutereka okumala ebbanga eddene. Ebivaako: PTFE film elastic memory ne silicone PSA creep wansi wa puleesa/ebbugumu. Okuziyiza: gradient winding tension (ebweru tight, inner loose) nga okola, nga kwogasse n’okufulumya okusiiga ku ludda olutali lwa kwesiiga. Teeka ku -15°C okutuuka ku 40°C, 30-70% RH, mu bbanga ku racks, kyusakyusa emizingo buli luvannyuma lwa myezi esatu. Ku ddaala ly’okusiiga enzito, ssaako empapula ezifulumya wakati wa layers.

PTFE obutambi obw’ebbugumu eringi obuterekeddwa mu ngeri y’omuzingo busobola okutawaanyizibwa okunywerera wakati wa layeri (okuzibikira) n’okukyusa okwesiiga ku ludda olutakwata. Ebikoola ebivaako: PTFE film elastic memory ne silicone PSA creep wansi wa puleesa n’ebbugumu. Ekigonjoola: okusika omuguwa okw’okutambula (gradient winding tension) – okunywevu ku layers ez’ebweru, okusumululwa ku layers ez’omunda – nga okozesa okufuga okusika okwa closed-loop. Okujjuliza n’okusiiga okusumulula, okutereka obulungi (15-40°C, 30-70% RH), okuteeka mu bbanga, n’okukyusakyusa omuzingo buli luvannyuma lwa myezi esatu.

PTFE ttaapu ey’ebbugumu eringi ekozesebwa mu kukwatagana n’emmere erina okussa ekitiibwa mu kkomo ly’ebbugumu erikakali: ≤260°C okukozesebwa obutasalako (tewali kkomo ku budde), 260-300°C okumala eddakiika eziwera 30 zokka, ne >300°C ekugirwa. Tape eno ya kukwatagana butereevu kwokka (tray liners, heat sealer covers), so si kuzinga mmere butereevu. Tokolangako nga tolina mmere (dry heating). Kikyuseemu singa oba olina ebizimba, ebya kyenvu oba ebyambala.

Silicone pressure-sensitive adhesives (PSA) ku PTFE obutambi obw’ebbugumu eringi zaawukana nnyo mu kukola kw’okukaddiwa okw’ebbugumu eringi. Methylphenyl silicone PSA ekuuma amaanyi g’ebikuta >85% oluvannyuma lwa 250°C/ennaku 7, ate ekika kya methyl ekya bulijjo kikka okutuuka ku 50-70%. Enkola eziwonyezebwa (addition-cured) (hydrosilylation) ziwa okutebenkera okulungi ennyo okusinga okuwonyezebwa perokisayidi. Okusobola okuweereza obutasalako ku 200°C+, londa ebika bya phenyl ebingi ebiwonye n’okugattako.

Obutambi obutambuza ebbugumu obwa PTFE pressure-sensitive adhesive (PSA) bulina okutambuza ebbugumu nga busigala nga bukwatagana. Okwongerako ebijjuza kiyamba okutambuza ebbugumu naye kiruma okunyweza. Bbalansi ennungi ekozesa obutundutundu obunene obw’enkulungo (nga conductive skeleton) obutabuddwamu obutundutundu obutono (okujjuza ebifo ebitaliimu), okukuuma omugatte gw’okutikka okujjuza waggulu ddala w’omusingi gw’okukulukuta. Weewale ebikuta n’ebiwuziwuzi; batta tack.