Ɣe ka ɣi Wozãa PTFE ƒe dzoxɔxɔ gã ƒe adhesive tape le dɔwɔwɔ siwo lɔ teteɖeanyi si nɔa anyi didi, clamping force, alo agba si nɔa anyi ɖaa ɖe eme – abe insulation léle ɖe teƒe si le pɔmpi dzodzoe dzi, alo dɔwɔwɔ abe xɔtuɖaŋu ƒe kadodo ene le nuteɖeamedzi madzudzɔmadzudzɔe te – kuxi ɣaɣla aɖe ateŋu ado mo ɖa: creep.
Creep nye nu aɖe ƒe tɔtrɔ blewuu, si nɔa anyi ɖaa le agba madzudzɔmadzudzɔe te le ɣeyiɣi aɖe megbe. Le xɔme ƒe dzoxɔxɔ nu la, adze abe PTFE kasɛt la li ke ene. Gake le 200°C alo 260°C gɔ̃ hã me – eƒe dɔwɔwɔ ƒe didime si bɔ – adhesive layer ateŋu afa eye wòasi, eye PTFE substrate ateŋu ato 'cold flow' (creep below its melting point).
Aokai PTFE do creep ƒe nuwɔna kpɔ le gaƒoƒo akpe geɖe me. Nyati sia ɖe alesi wodaa creep kpɔ, alesi adhesive layer kple substrate ɖesiaɖe kpena ɖe eŋu, kple tape ƒe xɔtutu siwo te ŋu nɔa te ɖe creep nu nyuie wu la me.
Nusi Nye Creep le PTFE Tape – Eve Dimensions
Creep fia koŋ nuwo ƒe viscoelastic ŋuɖoɖo. Adhesive layer kple substrate wɔa dɔ to mɔnu vovovowo dzi, ke hã wo ame evea siaa kpɔa ŋusẽ ɖe deformation resistance bliboa dzi vevie.
Layer si le kpekpem wu ɖea mɔ na shear slippage geɖe → creep si kɔkɔ wu le agba ɖeka te
Zã nusi le tsɛ, si sɔ ɖe enu hena nusiwo tsi tre ɖe ʋuʋudedi ŋu
Nusiwo le wo nɔewo dome ƒe adhesion
Kadodo nyuie o nana be adhesive peeling tso substrate → interfacial slippage (menye bulk creep o) .
Zã silicone primer, kpɔ egbɔ be eƒe anyigba le dzadzɛ
Nu vevi siwo woatsɔ ayi: Silicone adhesive si wometsɔ crosslink o te la kpea fu le creep failure kabakaba me le dzoxɔxɔ si kɔ me. Premium anti-creep tapes zãa silicone si ƒe crosslink-density lolo si me wotsɔa nusiwo doa ŋusẽe kple nusiwo wotsɔ blaa nu tsɛ siwo dzi wokpɔna.
Aokai PTFE dzoxɔxɔ gã ƒe kasɛt zãa silicone PSA si ƒe crosslink-density gã si me fumed silica ŋusẽdodo le. Independent static shear testing le 260°C (1000g agba, 12.5×25 mm overlap) ɖee fia be >150 gaƒoƒo vaseɖe kpododonu – si sɔ na didi na dzoxɔxɔ gã ƒe agba madzudzɔmadzudzɔe dɔwɔwɔwo.
Substrate Nɔnɔmewo – PTFE Coated Fiberglass vs. Dzadzɛ PTFE Film
Wozãa substrate vevi eve na PTFE kasɛtwo, eye woƒe creep ƒe dɔwɔwɔ to vovo kura:
Substrate Ƒomevi
Creep Tsitretsitsi
Mɔ̃ si wozãna
PTFE sinima dzadzɛ
Dahe – te ŋu si wonya nyuie xɔa vuvɔ (cold creep). Le agba fafɛ siwo nɔa anyi ɖaa si le anyigba ƒe dzoxɔxɔ (327°C) teƒe sã te gɔ̃ hã la, tɔtrɔ gã si womate ŋu atrɔ o dzɔna le molecule ƒe kɔsɔkɔsɔ ƒe ʋuʋu ta.
Polymer → kɔsɔkɔsɔ siwo ŋu womedo ŋusẽe o la ƒua du toa wo nɔewo ŋu le nuteɖeamedzi si nɔa anyi didi me
Fiberglass avɔ si wotsɔ PTFE de tsii (si xɔ aƒe ɖe dzoxɔxɔ gã ƒe kasɛt dzi)
Enyo ŋutɔ – fiberglass ƒunukpeƒe si wolɔ̃ xea mɔ na PTFE vuvɔ ƒe sisi nyuie
Bliboe sintered PTFE keŋkeŋ encapsulating fiberglass ƒomeviwo ƒo ƒu ɖekae be woaƒo asa na interlayer shear slip. Impregnation si mesɔ gbɔ o → PTFE susɔe si le avɔ meshes me ƒua du le agba te
Substrate ƒe titrime & gbadzaƒe
Substrates ɣi siwo le gbadzaa ɖekae → flexural rigidity si lolo → stress distribution gɔ̃ hã → xea mɔ na localized premature creep tso stress concentration me
Nu vevi siwo woatsɔ ayi: Le dzoxɔxɔ si me agba le ɣesiaɣi ƒe dɔwɔwɔwo gome la, mègazã PTEF film tape dzadzɛ gbeɖe o – aʋuʋu le mɔ si womate ŋu atrɔ o nu. Tia PTFE kasɛt si ŋu wotsɔ fiberglass do ŋusẽe ɣesiaɣi.
Kpuie ko la – Alesi Nàkpɔ egbɔ be Creep Resistance le PTFE Tape me
Memanu
Nusi Nàdi
Nusiwo Wòle Be Woaƒo Asa na
Adhesive ƒomevi
Silicone PSA si ƒe crosslink-density lolo kple silica filler si me dzo le
Silicone si wometsɔ crosslink o, acrylic PSA (eʋuʋuna le dzoxɔxɔ si bɔbɔ wu me) .
Adhesive ƒe titrime
Nu tsɛ, ɖekawɔwɔ ƒe nutsyɔnu (taɖodzinu 0.02-0.05 mm) .
Adhesive layer si le kpekpem (>0.08 mm) – ɖea mɔ na shear slippage
Substrate ƒomevi
PTFE si wotsɔ fiberglass do ŋusẽe
PTFE film dzadzɛ (fafɛ creeps) .
Substrate ƒe nyonyome
High-density weave, si me wode tsii bliboe, si wotsɔ tsi ƒoe bliboe
Loose weave, impregnation si mesɔ gbɔ o, sintered ƒe akpa aɖe
Kadodo si le wo nɔewo dome
Primer atikewɔwɔ le adhesive kple substrate dome
No primer → adhesive peeling ɖe bulk creep teƒe
Kafukafu nyui: Le agba si nɔa anyi ɖaa ƒe dzoxɔxɔ gã dɔwo gome (le kpɔɖeŋu me, pɔmpi ƒe xɔtunu babla le teteɖeanyi te, akpawo léle ɖe platen siwo me dzo le dzi), bia static shear data le wò dzoxɔxɔ kple agba tɔxɛa nu. Gblɔ PTFE kasɛt si ŋu wotsɔ fiberglass do ŋusẽe, ke menye film tape o. Kpɔe ɖa be nusi wotsɔna léa nu ɖe nu ŋu la nye silicone si ƒe crosslink-density lolo kple filler.
In summary , PTFE ƒe dzoxɔxɔ gã ƒe adhesive tape ƒe creep tsitretsitsi le ɣeyiɣi didi ƒe agba madzudzɔmadzudzɔe te nɔ te ɖe akpa eve dzi. Ele be silicone PSA ƒe ƒuƒoƒoa nanye crosslink density si lolo, reinforcing fillers (fumed silica), kple tsɛ si wotsɔ blae ɖekae be wòatsi tre ɖe viscous sisi ŋu. Ele be substrate la nanye fiberglass-reinforced PTFE – PTFE film dzadzɛ ato vuvɔ ƒe ʋuʋu si womate ŋu atrɔ o me le dzoxɔxɔ gã me. Fiberglass ƒunukpeƒea tsɔa agbaa eye wònana nusi wotsɔ wɔe la nɔa te sesĩe le eƒe didime nu.
Ne èle PTFE kasɛt tiam na dzoxɔxɔ gã ƒe dɔwɔwɔ siwo me agba ɣesiaɣi la, mègakpɔ dzidzɔ ɖe PTFE film tepe dzadzɛ ŋu gbeɖe o. Bia static shear data ɣesiaɣi le wò dɔwɔwɔ ƒe dzoxɔxɔ nu. Eye ɖo ŋku edzi be: kadodo si le adhesive kple substrate dome hã le vevie – primer-treated interfaces xea mɔ na interfacial slip.
Èhiã PTFE-ka si te ŋu nɔa te ɖe ʋuʋudedi nu na agba si nɔa anyi ɖaa si ƒe dzoxɔxɔ loloa? Aokai PTFE naa fiberglass-do ŋusẽ tape kple high-crosslink-density silicone PSA, si ŋu woda asi ɖo to 260°C static shear dodokpɔ me. Te ɖe mía ŋu nàgblɔ wò agba, dzoxɔxɔ, kple ɣeyiɣi didime ƒe nudidiwo.
Ne èhiã na nyatakaka bubuwo, dɔwɔwɔ ƒe mɔfiamewo, kple egbɔkpɔnu siwo wowɔ ɖe ɖoɖo nu na míaƒe adzɔnuwo ƒe ƒuƒoƒo bliboa si me PTFE dzoxɔxɔ gã avɔ, PTFE adhesive tape, PTFE mesh conveyor belt, seamless fuser belt, ɖeka-afã PTFE avɔ, kɔkɔ-dzoxɔxɔ tsi tre ɖe conveyor belt kple dzoxɔxɔ-tsitretsitsi fiberglass avɔ , se le ɖokuiwò me faa be yeate ɖe mía ŋu:
Míeléa dɔnyala kple fɔmaɖimaɖi me ɖe asi, míetsɔ mía ɖokui na be míana egbɔkpɔnu siwo wowɔ ɖe ɖoɖo nu le teƒe ɖeka eye míebua kpekpeɖeŋu le nudzadzra megbe ŋu!
