Engeri Silicone Adhesive Tg gy'ekosaamu PTFE Tape Performance ku Bbugumu Entono

Wali ogezezzaako okukozesa tape eya bulijjo mu firiiza? Kifuuka kikaluba, tekisigala nga kikwatagana ate nga kifukamidde kyatika. A PTFE high-temperature tape ekozesebwa mu mbeera za low temperature – okuva ku cold storage okutuuka ku cryogenic pipelines – adhesive’s glass transition temperature (Tg) ekola enjawulo yonna.

Silicone pressure-sensitive adhesive erina Tg entono ennyo nga -120°C . Eno y’ensonga enkweke lwaki PTFE tape esigala nga ekyukakyuka era nga yeekwata ku bbugumu erya wansi nga -70°C.

Aokai PTFE esomye nnyo ekifo kino. Ekiwandiiko kino kinnyonnyola ssaayansi ali emabega wa Tg n’engeri gy’akosaamu enkola ya tape mu mbeera ennyogovu.

Ebbugumu ly’okukyuka kw’endabirwamu (Tg) kye ki era Lwaki Kikulu?

Ebbugumu ly’enkyukakyuka y’endabirwamu (Tg) kye kifo polimeeri w’ekyuka okuva mu mbeera ennyogovu, eya kapiira okudda mu mbeera y’endabirwamu enkalu, enkaluba . Ebbugumu bwe likka wansi wa Tg, enjegere za molekyu za polimeeri zifuuka bbugumu, ne zifiirwa amazzi n’obusobozi bw’okunyweza.

Ku bizigo ebikwatagana ne puleesa:

• Waggulu wa Tg: Enjegere zitambula mu ddembe → ekyesiiga kisigala nga kigonvu, nga kikwatagana, era kisobola okufukirira ebifo

• Wansi wa Tg: Enjegere zifuuka bbugumu → adhesive ekaluba, efiirwa tack, era efuuka brittle

Lwaki silicone PSA ya njawulo: Tg yaayo eya -120°C ntono nnyo bw’ogeraageranya n’ebizigo bya acrylic (Tg around -20°C to -30°C). Kino kitegeeza nti silikoni asigala nga ye laasitiki era nga yeekwata mu bbugumu erigazi ennyo – okuva ku -70°C okutuuka ku 260°C.

Enkolagana wakati wa Tg n’omulimu gw’okusiiga si switch ya on/off ennyangu. Ne bwe kiba 30°C waggulu wa Tg, okutambula kwa molekyu kukyali kutono; ekisiiga kiyinza okuba ‘eky’amaliba’ okusinga okuba nga kya kapiira mu bujjuvu. Ku kukozesa PTFE tape wansi wa -50°C, ekyesiiga kirina okukuuma modulus ya ‘rubbery plateau’ wakati wa 104 ne 106 Pa. Silicone PSA kino kituuka ku nga -80°C olw’omugongo gwayo ogwa siloxane ogugonvu (–Si–O–Si–). Ebisiiga bya acrylic, ebirina emigongo gya kaboni-kaboni emikalu, mu bujjuvu bifiirwa tack wansi wa -30°C. Kino kye kinnyonnyola lwaki obutambi bwa PTFE obukozesebwa silikoni bwokka bwe busemba okukozesebwa mu firiiza (-30°C okutuuka ku 0°C) oba embeera za cryogenic.

Enkola y’okufuga kwa Tg ku PTFE Tape

Okutwalira awamu omulimu gw’ebbugumu ettono ogwa PTFE ttaapu ey’ebbugumu eringi gusalibwawo awamu byombi oluwuzi olusiiga n’ekintu ekiyitibwa PTFE substrate . PTFE yennyini nayo erina Tg nga -120°C – efaananako mu ngeri eyeewuunyisa ne silicone PSA.

Okutegeera okukulu: Kasita ebbugumu ly’obuweereza lisigala waggulu wala wa Tg (okugeza, -70°C, nga lino liri 50°C waggulu wa -120°C), byombi ekyesiiga n’ekisengejja bisigala mu mbeera ya laasitiki ey’amaanyi, ekikakasa okukyukakyuka okulungi ennyo mu bbugumu eri wansi n’okunyweza okunywevu.

Aokai PTFE’s thermal analysis lab ekakasizza nti silicone PSA ekuuma ebitundu ebisukka mu 80% ku maanyi gaayo ag’okusekula mu bbugumu ly’ekisenge ku -70°C, ate acrylic PSA efiirwa ebitundu ebisukka mu 90% wansi wa -30°C. Data eno ekwatagana n’enjawulo ya Tg.

Mu nkozesa entuufu eya cryogenic (okugeza, mask tape for low-temperature plasma spraying oba fixation okumala akaseera mu liquid nitrogen dewars), abakozesa batera mu bukyamu okunenya firimu ya PTFE olw’okukutuka so nga omusango omutuufu ye adhesive. Ekisiiga bwe kifuuka bbugumu wansi wa Tg yaakyo, kifiirwa okugoberera era tekisobola kunyiga situleesi ya kubeebalama. Olwo okusika kukyuka ne kidda mu PTFE substrate, ekiyinza okuba nga kikyali kigonvu, naye oluwuzi olukaluba olw’ekyesiiga kikola nga ekikuŋŋaanya situleesi, ne kitandika enjatika ku nsengekera y’ekyesiiga-substrate. Ekigonjoola si kukozesa firimu ya PTFE enzito, wabula okukakasa nti ekisiiga kisigala waggulu wa Tg yaakyo. Ku mbeera za cryogenic ezisukkiridde wansi wa -150°C, ne silicone PSA efuuka marginal. Mu mbeera ng’ezo, okusiba mu byuma (clamps, screws) oba obutambi bwa PTFE obutaliimu adhesive kirungi, kubanga tewali PSA esobola kukola wansi wa -180°C.

Enkosa ku kunyweza n’okukyukakyuka mu bbugumu erya wansi

1. Okunywerera ku bbugumu ery’enjawulo

2. Okukyukakyuka mu bbugumu erya wansi

Tg eya wansi ennyo (-120°C) esobozesa ekyesiiga okukuuma obugumu n’obugonvu ne ku -70°C, ekiziyiza obulungi enjatika ezikutuka. Teepu esobola okufukamira, okuzingibwa, n’okuziyizibwa mu ddembe awatali kumenya kwa bbugumu – okwawukana ku ttaapu eza bulijjo ezisiiga ezikutuka mu mbeera ennyogovu.

Mu bufunze & Enkola y'okukozesa

Ebbugumu eritono ery’okukyusa endabirwamu erya silicone PSA lisobozesa PTFE ttaapu ey’ebbugumu eringi okukuuma obuzito obutebenkevu n’okukyukakyuka mu mbeera z’ebbugumu entono.

Ekitabo ekilungamya okulonda okusinziira ku bbugumu:

Ebikwata ku kutereka n'okukozesa:

• Teeka tape mu ngeri ya hermetically mu bifo ebiyonjo era ebikalu okusinziira ku by’ekikugu

• Ku kusiiga ku bbugumu eritono (okugeza, okusiiga tepu mu mbeera ennyogovu), sooka bbugumu ttaapu n’oludda lw’okusiba okulongoosa okunyweza okusooka

• Weewale okusiiga tape wansi wa 0°C nga tobugumye – ne silicone PSA yeetaaga okusooka okukwatagana waggulu wa Tg okusobola okufukirira obulungi

In summary , ultra-low glass transition temperature (-120°C) ya silicone pressure-sensitive adhesive kye kifuula PTFE high-temperature tape ey’enjawulo okutuukagana n’embeera ennyogovu ne cryogenic. Nga obutambi bwa acrylic bulemererwa wansi wa -30°C, silicone-based PTFE tape esigala nga nnyangu era nga yeekwata okutuuka ku -70°C – era esobola okuwangaala ebbugumu erya wansi ennyo nga ekendedde okunywerera.

Ku bintu ebisinga obungi ebikozesebwa mu makolero (freezers, cold chain equipment, okuteekebwa ebweru mu kiseera eky’obutiti), standard PTFE tape ne silicone PSA ekola mu ngeri eyesigika. Ku mulimu gwa deep cryogenic, weebuuze ku mukugu – era lowooza ku mechanical fixation wansi wa -150°C.

Oyagala tape ya PTFE okukozesa ku bbugumu eritono? Aokai PTFE egaba ebigezo ebya mutindo n’ebikyusiddwa ku mbeera ez’enjawulo ezinnyogoga. Tuukirira ttiimu yaffe ey'ekikugu n'ebbugumu lyo n'omulimu gwo.

Efulumiziddwa kkampuni ya Jiangsu Aokai New Materials Technology Co., Ltd.

For detailed parameters, application scenarios, and customized solutions of full-series products including PTFE high temperature fabric, PTFE high temperature tape, PTFE mesh belt, seamless fusing belt, olugoye lwa PTFE oludda olumu, omusipi ogugumira ebbugumu eringi n'olugoye lwa fiberglass , tukusaba otuukirire:

• Mwami Guo: +86 18944819998 ye

• Mwami Liu: +86 13705266308 ye

Tunywerera ku bukugu n’obwesimbu, nga twewaddeyo okuwa eby’okugonjoola ebizibu mu kifo kimu n’obuweereza obufaayo.