Ðe nète kpɔ be yeazã kasɛt dzro aɖe le nufamɔ̃ me kpɔa? Etrɔna sẽna, megaléna ɖe nu ŋu o, eye wògbãna ne wobɔbɔe. Elabena PTFE ƒe dzoxɔxɔ gã ƒe tape si wozãna le dzoxɔxɔ sue ƒe nɔnɔmewo me – tso nufamɔ̃ dzi va ɖo cryogenic pipelines dzi – adhesive’s glass transition temperature (Tg) ye wɔa vovototoa katã.
Silicone-sensitive-sensitive adhesive ƒe Tg si bɔbɔ ŋutɔ si ade -120°C . Esiae nye susu ɣaɣla si tae PTFE tape gakpɔtɔ te ŋu trɔna eye wòléna ɖe nu ŋu le dzoxɔxɔ si bɔbɔ abe -70°C ene me.
Aokai PTFE srɔ̃ nu tso nunɔamesi sia ŋu vevie. Nyati sia ɖe dzɔdzɔmeŋutinunya si le megbe na Tg kple alesi wòkpɔa ŋusẽ ɖe kasɛt ƒe dɔwɔwɔ dzi le vuvɔŋɔli me.
Nukae Nye Glass Transition Temperature (Tg) Eye Nukatae Wòle Vevie?
Glass ƒe tɔtrɔ ƒe dzoxɔxɔ (Tg) nye afisi polymer trɔna tso nɔnɔme fafɛ si le abe rababa ene me va zua glass ƒe nɔnɔme sesẽ si megbãna le . Ne dzoxɔxɔ ɖiɖi wu Tg la, polymer molecule ƒe kɔsɔkɔsɔwo tsia tsikpe, si wɔnɛ be tsi ƒe sisi kple nuléle ƒe ŋutete meganɔa wo ŋu o.
Le nusiwo wotsɔna léa nu ɖe nu ŋu siwo sea nyaƒoɖeamenu ŋu gome la:
Le Tg dzi: Kɔsɔkɔsɔwo ʋãna faa → nusi léna ɖe nu ŋu nɔa fafɛ, léna ɖe nu ŋu, eye wòte ŋu tsia anyigba
Le Tg te: Kɔsɔkɔsɔwo tsia tsikpe → nusi léna ɖe nu ŋu la sesẽna, megasẽna o, eye wòzua gbagbã
Nusita silicone PSA nye etɔxɛ: Eƒe Tg si nye -120°C le sue ŋutɔ ne wotsɔe sɔ kple acrylic adhesives (Tg si anɔ -20°C va ɖo -30°C). Esia fia be silicone gakpɔtɔ nɔa te sesĩe eye wòléna ɖe nu ŋu le dzoxɔxɔ si keke wu sã me – tso -70°C va ɖo 260°C.
Ƒomedodo si le Tg kple adhesive ƒe dɔwɔwɔ dome menye on/off switch bɔbɔe o. Ne èle 30°C dzi wu Tg gɔ̃ hã la, molecule ƒe ʋuʋu gakpɔtɔ le sue; nusi wotsɔna léa nu ɖe nu ŋu ate ŋu anye ‘lãgbalẽ’ tsɔ wu be wòanye goma bliboe. Le PTFE tape zazã le -50°C te la, ele be aŋenu la nalé ‘rubbery plateau’ modulus si le 104 kple 106 Pa dome la me ɖe asi. Silicone PSA te ŋu ɖoa esia gbɔ va ɖoa abe -80°C ene le eƒe siloxane megbeƒu si te ŋu trɔna bɔbɔe (–Si–O–Si–) ta. Zi geɖe la, acrylic-nulénu siwo ƒe megbeƒu siwo nye carbon-carbon sesẽ wu la megasẽna le -30°C te o. Esia ɖe nusitae wokafu PTFE kasɛt siwo wotu ɖe silicone dzi ko na nufamɔ̃ (-30°C va ɖo 0°C) alo nuto siwo me dzoxɔxɔ le me.
Nusuekpɔmɔ̃ ƒe Ŋusẽkpɔɖeamedzi Mɔnu si Tg le PTFE Tape dzi
ƒe dzoxɔxɔ si mebɔ o ƒe dɔwɔwɔ bliboa PTFE nye esi wotsɔa nusi léna ɖe nu ŋu kple PTFE ƒe anyigba siaa ɖoa kpe edzi . PTFE ŋutɔ hã ƒe Tg anɔ abe -120°C ene – eɖi silicone PSA le mɔ ɖedzesi aɖe nu.
Dzoxɔxɔ ƒe Agbɔsɔsɔme
Adhesive Nɔnɔme
PTFE Substrate ƒe Nɔnɔme
Tape ƒe Nuwɔna bliboa
Le Tg dzi (>-120°C, le kpɔɖeŋu me, -70°C) .
Rubbery, nusi léna ɖe nu ŋu
Si bɔbɔ
Adhesion nyui, ate ŋu abɔbɔ evɔ magbã o
Le Tg gbɔ (anɔ abe -120°C ene) .
Trɔtrɔ ƒe nuto
Trɔtrɔ ƒe nuto
Woɖe edzi gake egakpɔtɔ le dɔ wɔm
Le Tg te (<-120°C, le kpɔɖeŋu me, -180°C) .
Glassy, si le gbagbãm
Dzeti
Adhesion bu vevietɔ; tape va zua nusi gbãna
Gɔmesese vevi: Zi alesi subɔsubɔ ƒe dzoxɔxɔ nɔa Tg dzi sã (le kpɔɖeŋu me, -70°C, si nye 50°C wu -120°C) la, nusi léna ɖe nu ŋu kple nusi le ete siaa nɔa nɔnɔme si me woate ŋu abla nu le ŋutɔ me, si naa kakaɖedzi be dzoxɔxɔ si bɔbɔ ƒe asitɔtrɔ nyuie ŋutɔ eye wòléna ɖe nu ŋu si li ke.
Aokai PTFE’s thermal analysis lab ɖo kpe edzi be silicone PSA léa eƒe xɔme dzoxɔxɔ ƒe ʋuʋudedi ƒe ŋusẽ si wu 80% ɖe te le -70°C, gake acrylic PSA ya bu wu 90% le -30°C te. Nyatakaka sia sɔ kple Tg ƒe vovototoa.
Le cryogenic zazã ŋutɔŋutɔ me (le kpɔɖeŋu me, mask tape tsɔ ƒua gbe ɖe plasma si ƒe dzoxɔxɔ mede o alo ɣeyiɣi kpui aɖe ƒe fixation le tsi nitrogen dewars me), zi geɖe la, ezãlawo bua fɔ PTFE film la vodadatɔe be egbã esime fɔɖila ŋutɔŋutɔe nye nusi léna ɖe eŋu. Ne nusi léna ɖe nu ŋu la xɔ dzo le eƒe Tg te la, megate ŋu wɔa ɖe edzi o eye mete ŋu xɔa nuteɖeamedzi si le eƒe bɔbɔ me o. Emegbe teteɖeanyia trɔna yia PTFE ƒe anyigba, si ate ŋu atrɔ ɖe nɔnɔmewo ŋu kokoko, gake nusi léna ɖe nu ŋu ƒe akpa sesẽa wɔa dɔ abe nuteɖeamedzi ƒe nutete ene, si dzea gbagbã gɔme le aŋenu kple nusi wotsɔ blaa nu ƒe domedome. Menye egbɔkpɔnuae nye be woazã PTFE film si le kpekpem wu o, ke boŋ be woakpɔ egbɔ be nusi léna ɖe nu ŋu la gakpɔtɔ le eƒe Tg dzi. Le cryogenic nɔnɔme siwo gbɔ eme siwo le -150°C te gome la, silicone PSA gɔ̃ hã va zua nu sue aɖe ko. Le nɔnɔme mawo me la, wokafui be woatsɔ mɔ̃ ablae (clamps, screws) alo PTFE tape siwo me nulénu mele o, elabena PSA aɖeke mate ŋu awɔ dɔ le -180°C te o.
Ŋusẽkpɔɖeamedzi ɖe Dzoxɔxɔ si Mebɔ O ƒe Adhesion Kple Trɔtrɔ Ðe Nɔnɔmewo Ŋu Dzi
Kɔsɔkɔsɔwo xɔ dzo keŋkeŋ kloe; PSA ƒe nuwɔna nu yina
2. Dzoxɔxɔ si le bɔbɔe ƒe asitɔtrɔ le nɔnɔmewo ŋu
Tg si bɔbɔ ŋutɔ (-120°C) nana be nusi wotsɔna léa nu ɖe nu ŋu la léa eƒe teteɖeanyi kple fafɛ me ɖe asi le -70°C gɔ̃ hã me, si xea mɔ na gbagbãƒe ƒe gbagbã nyuie. Woateŋu abɔbɔ kaƒomɔ̃a, axatsae, eye woablae faa evɔ womagbãe wòagbã o – to vovo na kasɛt dzro siwo léna ɖe nu ŋu siwo gbãna le teƒe siwo fa miamiamia.
Kpuie & Mɔfiame Siwo Ku Ðe Dɔwɔwɔ Ŋu
Silicone PSA ƒe glass ƒe tɔtrɔ ƒe dzoxɔxɔ si bɔbɔ na be PTFE ƒe dzoxɔxɔ gã ƒe tape te ŋu léa eƒe ʋeʋẽ li ke eye wòte ŋu trɔna ɖe nɔnɔmewo ŋu le dzoxɔxɔ sue ƒe nɔnɔmewo me.
Etɔxɛe trɔ asi le ultra-low dzoxɔxɔ tsitretsitsi PTFE kasɛt
Ðewohĩ abia be woawɔ atike si wowɔ ɖe ɖoɖo nu
≤ -180°C ƒe dzoxɔxɔ
Adhesive-maɖemaɖe dzadzɛ PTFE film + mɔ̃ fixation
PSA ƒe adhesion va zua nusi dzi womate ŋu aka ɖo o
Nudzraɖoƒe & Zazã Ŋuti Nyatakakawo:
Dzra tape ɖo hermetically le teƒe fafɛ, ƒuƒui le mɔ̃ɖaŋununya ƒe nɔnɔmewo nu
Ne èdi be yeatsɔe awɔ dɔ le dzoxɔxɔ si mebɔ o me (le kpɔɖeŋu me, nàtsɔ tape asisi ɖe teƒe si fa miamiamia) la, do dzo na kaƒomɔ̃a kple eƒe kadodoa siaa do ŋgɔ be wòalé ɖe eŋu le gɔmedzedzea me nanyo ɖe edzi
Ƒo asa na tape sisi ɖe 0°C te dzoxɔxɔ manɔmee – silicone PSA gɔ̃ hã hiã na kadodo gbãtɔ si wu Tg hena tsidede nyuie
In summary , ultra-low glass transition temperature (-120°C) silicone pressure-sensitive adhesive nye nusi na PTFE high-temperature tape sɔ etɔxɛe na vuvɔ kple cryogenic nɔnɔmewo. Togbɔ be acrylic tapes doa kpo nu le -30°C te hã la, PTFE tape si wotu ɖe silicone dzi gakpɔtɔ te ŋu trɔna eye wòléna ɖe nu ŋu vaseɖe -70°C – eye ateŋu anɔ agbe le dzoxɔxɔ si bɔbɔ wu sã me ne woɖe woƒe alé ɖe wo nɔewo ŋu dzi kpɔtɔ.
Le dɔwɔƒewo ƒe vuvɔ zazã akpa gãtɔ gome (nufamɔ̃wo, fafa kɔsɔkɔsɔ dɔwɔnuwo, gota xɔwo le dzomeŋɔli), PTFE tape si wozãna ɖaa si me silicone PSA le wɔa dɔ kakaɖedzitɔe. Ne èdi cryogenic dɔwɔwɔ goglo la, yi eŋutinunyala bibi aɖe gbɔ – eye nàbu mɔ̃ɖaŋununya ƒe fixation le -150°C te ŋu.
Èhiã PTFE kasɛt na zazã le dzoxɔxɔ si mebɔ o mea? Aokai PTFE naa dzeside siwo sɔ kple esiwo ŋu wotrɔ asi le na vuvɔ ƒe nɔnɔme vovovowo. Te ɖe míaƒe mɔ̃ɖaŋudɔwɔlawo ŋu nàgblɔ wò dzoxɔxɔ ƒe didime kple dɔwɔwɔ ƒe ɣeyiɣi.
Jiangsu Aokai Nu Yeyewo Mɔ̃ɖaŋununya Co., Ltd. ye ɖee ɖe go.
