Ne a Wozãa PTFE ƒe dzoxɔxɔ gã ƒe adhesive tape le teƒe si dzoxɔxɔ le – ne míagblɔe la, 200°C kwasiɖa alo ɣleti geɖe – silicone pressure-sensitive adhesive (PSA) ateŋu atrɔ. Peel ƒe ŋusẽ ate ŋu akɔ, aɖiɖi, alo atsɔ nusiwo susɔ la ayi teƒe bubu. Ðekawɔwɔ ate ŋu adzi ɖe edzi (brittleness) alo aɖiɖi (cohesive failure).
Menye silicon PSAwo katãe wɔa nu ɖekae o. Vovototoawo va ɖo polymer ƒe wɔwɔme (methyl vs. methylphenyl), crosslinking mechanism (peroxide vs. addition cure), kple MQ resin kple rubber ƒe sɔsɔme gbɔ.
Aokai PTFE zãa silicone PSA ƒe dzesi geɖewo le míaƒe kasɛtwo me. Mɔfiame sia ɖe nusi dzɔna ɖe lãgbalẽ ƒe ŋusẽ kple ɖekawɔwɔ dzi le tsitsi le dzoxɔxɔ gã me megbe na klass ɖesiaɖe, kple alesi nàtia esi sɔ na wò dɔwɔwɔ.
Nusi Dzɔna Ðe Silicone PSA Dzi Le Dzoxɔxɔ Te – Dodokpɔ ƒe Mɔnu Eve
Ne wotsi le dzoxɔxɔ gã (200-250°C) me la, silicone PSAwo ate ŋu ato tɔtrɔ eve siwo tsi tre ɖe wo nɔewo ŋu me:
1. Post-crosslinking (hea brittleness vɛ) .
Dɔwɔha siwo mewɔa nu o yi edzi le nu wɔm, si wɔnɛ be crosslink density dzina ɖe edzi. Ŋusẽ si le lãgbalẽa ŋu le gɔmedzedzea me ate ŋu adzi ɖe edzi hena ɣeyiɣi aɖe, emegbe wòadze anyi vevie ne nusi léna ɖe nu ŋu la va le sesẽm akpa. Edze abe static shear strength dzina ɖe edzi ene, gake holding power kple impact resistance gblẽna. Film si wotsɔ léa nu ɖe nu ŋu la sesẽna eye wògbãna.
Crosslink density kple dɔyɔyɔ ƒomevi (addition cure vs. peroxide cure) .
MQ resin kple silicone rababa ƒe sɔsɔme
Dzesidede ƒe hatsotsowo le atikewo ƒe wɔwɔme nu
1. Polydimethylsiloxane si wozãna ɖaa (methyl-ƒomevi silicone PSA) .
Aŋɔ ƒe léle ɖe te le tsitsi megbe (200-250°C): Aŋe ƒe ŋusẽ dzina ɖe edzi vie le gɔmedzedzea me, emegbe edzi ɖena kpɔtɔna. Le ŋkeke 7 megbe le dzoxɔxɔ 250°C me la, koe lãgbalẽa ƒe léle ɖe asi 50-70% . Dɔwɔwɔ dzi ɖena kpɔtɔna kabakaba le dzoxɔxɔ si kɔ wu me. Nusiwo gblẽna tsoa dimethyl siloxane ƒe megbeƒu ƒe cyclization gbɔ.
Cohesion stability: Peroxide-cured versions (le kpɔɖeŋu me, KR-101) ƒe gɔmedzenu susɔewo le esi si hea post-curing si dzi womeɖu o vɛ – adhesive sesẽna eye wògbãna. Gbãtɔ ƒe ʋuʋudedi ƒe ŋusẽ nyona ɖe edzi, gake ŋusẽ si léa nu ɖe asi dzi ɖena kpɔtɔna, eye cohesive ƒe kpododonu dzɔna le dzoxɔxɔ te. Nusiwo wotsɔ kpe ɖe eŋu da gbe le wo ŋu la nyo vie gake wogakpɔtɔ seɖoƒe li na le esi dimethyl ƒe megbeƒu ƒe dzoxɔxɔ si le dzɔdzɔme nu mete ŋu nɔa te ɖe enu nyuie o ta.
2. Methylphenyl polysiloxane (si te ŋu nɔa te ɖe dzoxɔxɔ si nu sẽ nu) .
Peel ƒe léle ɖe te le tsitsi megbe: Phenyl ƒe axadzi kɔsɔkɔsɔwo gblẽa dimethyl ƒe akpawo ƒe babla edziedzi me eye wotsia cyclization ƒe gbegblẽ nu. Le ŋkeke 7 megbe le dzoxɔxɔ 250°C me la, lãgbalẽ ƒe ŋusẽ léle ɖe te wu 85% . Phenyl geɖe ƒe atikewo léa lãgbalẽ ƒe nɔnɔme siwo li ke me ɖe asi le dzoxɔxɔ 260-288°C gɔ̃ hã me.
Ðekawɔwɔ ƒe liƒo: Enyo ŋutɔ. Ŋusẽ si wotsɔ lãa lãe metrɔna boo o; ŋusẽ léle ɖe asi wu 80%. Nusi wotsɔ léa nu ɖe nu ŋu la nɔa te ɖe nɔnɔme sesẽwo nu ɣeyiɣi didi aɖe evɔ megbãna alo nu susɔe aɖeke manɔmee. Phenyl deŋgɔ ƒe hatsotso siwo wotsɔ kpe ɖe eŋu lae nye silicone PSA si te ŋu nɔa te ɖe dzoxɔxɔ nu nyuitɔ kekeake.
3. Etɔxɛ high-peel kple low-peel custom grades
High-peel grades (le . Woɖea lãgbalẽ ƒe ɖiɖi si lolo wu fiana le tsitsi megbe eye wote ŋu xɔa nusiwo susɔ bɔbɔe le aŋɔ ƒe dzoxɔxɔ ƒe gbegblẽ ta. Zãe na dzoxɔxɔ si mebɔ o zazã ɣeaɖewoɣi ko.
Low-peel, high-cohesion protective film grades: Crosslink density si lolo naa peel ƒe dɔwɔwɔ si li ke eye tsitsi ƒe liƒo nyo ŋutɔ, gake tack gbãtɔ si bɔbɔ. Ne wotsi vɔ la, wogawɔa ɖeka gake wosẽna, si wɔnɛ be womete ŋu wɔa ɖeka kple anyigba siwo dzi ƒu kplakplakpla o.
Crosslinking Mechanism – Peroxide kple Atikewɔwɔ si Wotsɔ Kpe Ðe Eŋu (Methyl Base Ma ke) .
Ne wozã methyl polymer ma ke gɔ̃ hã la, atikewɔwɔmɔnua trɔa tsitsi ƒe nɔnɔme ŋutɔ.
1. Peroxide-cured (dzidzime gbãtɔ si bɔ) .
Peroxide si susɔ la hea crosslinking megbe si dzi womeɖu o vɛ le tsitsi le dzoxɔxɔ si nu sẽ me.
Ðekawɔwɔ dzina ɖe edzi hena ɣeyiɣi aɖe, eye elektrikŋusẽ ƒe gbagbã kple elektrikŋusẽ si léa nu la kplɔnɛ ɖo.
Batch-to-batch tsitsi ƒe ɖekawɔwɔ menyo o.
2. Atikewɔwɔ si wotsɔ kpe ɖe eŋu (hydrosilylation curing) .
Atikewɔwɔ mewɔa nusiwo dona tso eme o; crosslink network nye nusi dzi woate ŋu aɖu pɛpɛpɛ.
Tɔtrɔ siwo vaa nunɔamesiwo ƒe tsitsi megbe la kplɔa flitete ƒe nɔnɔme si woate ŋu agblɔ ɖi la ɖo.
Peel retention kple cohesion stability si nyo wu sã ne wotsɔe sɔ kple peroxide ƒe atikewo.
Mɔfiame le Dzeside Tiatia Ŋu
Subɔsubɔdɔ ƒe Nɔnɔme
Dzeside si Wokafu
Nu ka ta
Dzoxɔxɔ gã si yia edzi (>200°C), lãgbalẽ si li ke, nu susɔe aɖeke mele eŋu o
Wotsɔ atike si wotsɔ kpe ɖe eŋu da dɔe, si me phenyl sɔ gbɔ ɖo (le kpɔɖeŋu me, Dow 7388, Q2-7406) .
>85% peel retention, no embrittlement, >80% holding ŋusẽ léle ɖe asi
Dzoxɔxɔ sesẽ si nɔa anyi ɣeyiɣi kpui aɖe si nɔa anyi ɣeaɖewoɣi, si me gazazã mele o
Standard methyl-ƒomevi, si wotsɔ kpe ɖe eŋu, si woda gbe le le abolome vɔ megbe (le kpɔɖeŋu me, 7657) .
Woda asi ɖe edzi gake kpɔ mɔ be lãgbalẽa ƒe gbegblẽ aɖewo eye wòate ŋu agbã le tsatsam didiwo me
Gbãtɔ ƒe lãgbalẽ si kɔkɔ ŋutɔ hiã, dzoxɔxɔ si bɔbɔ ko
Methyl grade si ƒe aŋgbawo sɔ gbɔ
Menye dzoxɔxɔ sesẽ si yia edzi ta o; kpɔ mɔ be nusiwo susɔ le tsitsi megbe
Film si kpɔa ame ta, ɖekawɔwɔ gã, tack si le bɔbɔe
Kɔkɔ-crosslink bɔbɔe-peel grade
Tsitsi ƒe liƒo nyuie ŋutɔ gake esesẽ eye mewɔ ɖeka kple wo nɔewo boo o
Aokai PTFE kafukafu : Le PTFE kasɛt ɖesiaɖe si akpɔ dzoxɔxɔ si anɔ anyi ɖaa si wu 200°C gome la, gblɔ methylphenyl silicone PSA si wotsɔ kpe ɖe eŋu. Ga si wogblẽna do ŋgɔ la lolo wu, gake exea mɔ na agblea ƒe kpododonu si aŋenu ƒe nugbagbevi alo kadodo ƒe bublu hena vɛ.
Kpuie ko la – Silicone PSA ƒe Dzeside ƒe sɔsɔ kple Dzoxɔxɔ ƒe Didi
Methyl-ƒomevi silicone PSA (vevietɔ si wotsɔ peroxide da dɔe) sɔ na zazã ɣeaɖewoɣi alo le dzoxɔxɔ si mebɔ o me ko. Le ŋkeke 7 megbe le 250°C megbe la, kpɔ mɔ be 30-50% ƒe lãgbalẽ ƒe bu eye wòate ŋu agbã.
Methylphenyl (high-phenyl) silicone PSA léa >85% ƒe lãgbalẽ ƒe ŋusẽ kple kadodo si te ŋu trɔna bɔbɔe le tsitsi ma ke megbe. Enye tiatia na 200-250°C subɔsubɔdɔ si yia edzi.
Crosslinking mechanism le vevie ŋutɔ: addition cure (hydrosilylation) li ke sã wu peroxide cure.
High-peel grades tsɔ tsitsi ƒe liƒo ɖɔlia tack gbãtɔ – ƒo asa na wo le dzoxɔxɔ ƒe dɔwɔwɔwo me.
Le dzoxɔxɔ gã ƒe kadodo si bia ta la, Aokai PTFE zãa methylphenyl silicone PSA siwo wotsɔ kpe ɖe wo ŋu. Míate ŋu ana peel retention data le 1000h megbe le 250°C ne wobia.
Esi míeléa dɔwɔwɔ nyuie kple fɔmaɖimaɖi me ɖe asi ta la, míenaa egbɔkpɔnu siwo wowɔ ɖe ɖoɖo nu le teƒe ɖeka kple nudzadzra megbe dɔwɔna siwo ŋu wobu nyuie.
