Nyati sia ƒo nu tso alesi woawɔ ɖeka kple nutsyɔnu mɔ̃ ƒe ka ƒe duƒuƒu kple dzodoƒe ƒe didime be woakpɔ egbɔ be organosilicone adhesive ɖo taɖodzinu ƒe dɔyɔyɔ ƒe dzidzenu na dzoxɔxɔ gã PTFE tape. Gɔmeɖose vevi si sɔ kple wo nɔewo: ɣeyiɣi si woanɔ anyi katã t_total = dzodoƒe ƒe didime si wɔa dɔ nyuie L ÷ fli ƒe duƒuƒu v mele be wòaɖiɖi wu ɣeyiɣi suetɔ kekeake si wobia be woatsɔ ada dɔe o. Na dɔyɔyɔ ƒe nɔnɔmewo to DSC alo adhesive cure dodokpɔ siwo ɖo 'dzoxɔxɔ — dɔyɔɣi suetɔ kekeake' ƒe ƒomedodo anyi. Equivalent cumulative cure model: ma dzodoƒe ɖe akpa vovovowo me, bu ti=Li/v kple tcure(Ti), kpɔ egbɔ be ∑(ti/tcure(Ti)) ≥1. Akɔntabubu ƒe ɖoɖowo: ɖo dzoxɔxɔ ƒe teƒe siwo ƒe didime nye Li kple dzoxɔxɔ Ti; set line speed v, bu akɔnta le nuto ɖesiaɖe ƒe nɔƒe kple nudzɔdzɔ ƒe xexlẽme ŋu; gbugbɔ gblɔe vaseɖe esime wo katã nanye ≥1 (wokafu dedienɔnɔ ƒe vovototo 1.1-1.2).

Nyati sia tsɔ vovototo siwo le infrared keklẽŋusẽ dzoxɔxɔ kple ya dzodzoe ƒe tsatsam dzoxɔxɔ ƒe dɔyɔyɔ mɔnuwo dome sɔ kple wo nɔewo le crosslinked structure uniformity of silicone adhesive layers ŋu. Dzoxɔxɔ ƒe tsɔtsɔ yi teƒe bubu ƒe mɔnuwo: ya dzodzoe nɔa te ɖe convection-conduction dzi kple dzoxɔxɔ ƒe dziyiyi blewu, dzoxɔxɔ ƒe vovototo sue aɖe le ememe/gota; IR ƒe gege ɖe eme ƒe goglome seɖoƒe li na eye eƒe anyigba ƒe xɔxlɔ̃ sesẽ (micrometre ewo va ɖo alafa geɖe) si wɔnɛ be anyigba ƒe goglome yia eme ƒe ʋuʋu sesĩe. Ŋusẽkpɔɖeamedzi ɖe crosslink ƒe ɖekawɔwɔ dzi: ya dzodzoe wɔnɛ be woate ŋu awɔ dɔ le ɣeyiɣi ɖeka me le eme kple egodo kple crosslink density ɖeka; IR nana be anyigba ƒe ƒuƒoƒo wɔa 'ŋutilã film' si le ʋeʋẽm kabakaba si xea mɔ na dzoxɔxɔ ƒe tsɔtsɔ kple kɔsɔkɔsɔ ƒe ʋuʋu ememetɔ, si wɔnɛ be crosslink density dzi ɖena kpɔtɔna tso anyigba dzi yi ememe.

Nyati sia ƒo nu tso agbɔsɔsɔme ƒe sɔsɔ si le gel ƒe akpa sue kple cohesive ŋusẽ dome le silicone pressure-sensitive adhesives na Teflon tape. Gel ƒe akpa sue = agbɔsɔsɔme ƒe alafa memamã si le crosslinked network si me mekɔna le toluene me o (Soxhlet extraction, 24hr). Ŋusẽ si wɔa ɖeka si ƒe dzesi enye dzoxɔxɔ gã si léa nu ɖe ​​te (180°C, 1kg). Etɔ̃ dometsotso: le teƒe vevi te (<60%) — percolating network aɖeke meli o, si léa ŋusẽ ɖe zero gbɔ; practical range (60-85%) — cohesive ŋusẽ tsina exponentially kple gel fraction, 60%→70% doa ɣeyiɣi si woatsɔ alée ɖe dzi tso minitiwo va ɖo gaƒoƒo, 70%→80% naa 3-10x dzidziɖedzi; crosslinking kɔkɔ (>85%) — viɖewo blewu (85%→95% koe 20-50% dzina ɖe edzi), tack ɖiɖina ŋutɔ, >95% bu PSA ƒe nɔnɔmewo.

Nyati sia ƒo nu tso alesi woawɔ asɔ kple peroxide crosslinking agents (BPO kple DCP) ƒe gbegblẽ ƒe dzoxɔxɔ kple afã ƒe agbenɔƒe kple curing process window na Teflon tape. Nyatakaka veviwo: BPO — 1-min afã ƒe agbenɔƒe le ~ 131 ° C, 1-hr le ~ 92 ° C, 10-hr le ~ 72 ° C; DCP — miniti 1 le ~ 171 ° C, gaƒoƒo 1 le ~ 135 ° C, gaƒoƒo 10 le ~ 115 ° C. Susu si sɔ kple wo nɔewo: adhesive hiã 97-99% crosslinking = 5-7 afã-agbe; ɣeyiɣi si wotsɔ daa dɔe = 5-7 × afã ƒe agbenɔƒe le dzoxɔxɔ si woɖo taɖodzinu na me. Back-bu akɔnta dzoxɔxɔ tso production line ƒe nɔƒe alo megbe-bu akɔnta ɣeyiɣi tso dzoxɔxɔ si ŋu woɖe mɔ ɖo si sɔ gbɔ wu.

Nyati sia tsɔ vovototo siwo le infrared keklẽŋusẽ dzoxɔxɔ kple ya dzodzoe ƒe tsatsam dzoxɔxɔ dome sɔ kple wo nɔewo le crosslinked structure uniformity of silicone adhesive layer dzi. Dzoxɔxɔ ƒe tsɔtsɔ yi teƒe bubu ƒe mɔnuwo: ya dzodzoe nye convection-conduction, fafɛ eye wòyia ŋgɔ, si wɔnɛ be dzoxɔxɔ ƒe tɔtrɔ si sɔ; IR nye keklẽŋusẽ ƒe xɔxlɔ̃ kple yame ƒe xɔxlɔ̃ sesẽ (micrometers va ɖo milimeta) si wɔnɛ be anyigba ƒe gogloƒe yi eme ƒe ʋuʋudedi si le togbɛ dzi. Ŋusẽkpɔɖeamedzi ɖe crosslink density mama dzi: ya dzodzoe ɖea mɔ na ememe kple egodo ƒe akpawo be woage ɖe vulcanization ƒe dzoxɔxɔ ƒe domedome le ɣeyiɣi ɖeka kloe me, si naa crosslink density ɖeka le titrime dzi; IR nana be anyigba ƒe ƒuƒoƒo da gbe le ŋutigbalẽ si le ʋeʋẽm si dzɔna enumake si xea mɔ na dzoxɔxɔ ƒe tɔtrɔ, si wɔnɛ be crosslink density ƒe ʋuʋudedi si le ɖaɖɛ dzi ɖena kpɔtɔna tso anyigba dzi yia eme.

Nyati sia dzro ŋusẽkpɔɖeamedzi siwo web tension dziɖuɖu kpɔna le Teflon ƒe dzoxɔxɔ gã ƒe tape coating wɔna ɖe PTFE substrate flatness kple adhesive coating uniformity dzi. Dɔwɔwɔ ɖe substrate ƒe gbadzaƒe dzi: tete si wu elastic limit hea plastic ƒe keke kple kɔ si womate ŋu atrɔ o vɛ (longitudinal elongation, transverse narrowing), si wɔa slackness, wrinkles kple wavy patterns; PTFE creep le tension si nɔa anyi ɖaa te va zua 'frozen' le fafa megbe, si wɔnɛ be anyigba ƒe masɔmasɔ; uneven transverse tension tso roller parallelism manyomanyo gbɔ naa nugbɔ siwo le ƒoƒom, titina ʋuʋudedi, kple dzesi siwo me mekɔ tututu o ɣeaɖewoɣi.

Nyati sia ƒo nu tso alesi PTFE ƒe dzoxɔxɔ gã ƒe tape adhesive layer ƒe cohesive ŋusẽ trɔna le dzoxɔxɔ gã ƒe tsitsi megbe ŋu. Afɔɖeɖe etɔ̃ ƒe nɔnɔme: Le dɔyɔyɔ megbe ƒe dziyiyi ƒe afɔɖeɖe (dzoxɔxɔ gã ƒe dodo kaba le 200-260°C, ƒuƒoƒo siwo susɔ siwo wɔa dɔ la yia edzi le crosslinking, ɖekawɔwɔ dzina ɖe edzi ŋutɔ); Stable equilibrium stage (crosslinking gogo nuwuwu, ɖekawɔwɔ gakpɔtɔ li ke le ɣeyiɣi didi aɖe me); Gbegblẽ kple ɖiɖi ƒe afɔɖeɖe (ɣeyiɣi/dzoxɔxɔ si gbɔ eme hea kɔsɔkɔsɔ veviwo ƒe gbegblẽ vɛ, ɖekawɔwɔ dzi ɖena kpɔtɔna, adhesive fa eye wòzua tacky). Wodzroa nusiwo gbɔ cohesive ƒe kpododonu (ememe vuvu gblẽa nusiwo susɔ) kple squeeze-out (fafɛ si sina tso goawo me le modulus si dzi ɖe kpɔtɔ ta) me.

Nyati sia tsɔ mɔnu siwo dzi woato ana Teflon ƒe dzoxɔxɔ gã ƒe kasɛt si léa nu geɖe la ƒe tsitretsitsi ɖe ʋuʋudedi ŋu kple eƒe léle ɖe te ɣeyiɣi didi nanyo ɖe edzi la fia. Mɔnuwo dometɔ aɖewoe nye: Molekyul network topology optimization — MQ silicone resin/gum ratio si kɔkɔ (1.2:1–2:1) wɔa rigid hard-phase domains; phenyl ƒuƒoƒo (20-30 mol%) ƒe dede eme xea mɔ na kɔsɔkɔsɔ ƒe ʋuʋu; crosslink molecule ƒe kpekpeme si dzi wokpɔna le 5,000-15,000 g/mol; Gradient modulus multilayer adhesive structure — primer-anchoring layer (1-3μm) kple silane coupling agent, high-modulus cohesive layer (30-50μm) abe ƒunukpeƒe si te ŋu nɔa te ɖe lãɖeɖe nu, viscoelastic dɔwɔwɔ ƒuƒoƒo (3-8μm) na tsidzadza le anyigba dzi; Nanofillers — fumed silica (10-25 wt%) kple anyigba ƒe tɔtrɔ naa ŋutilã me crosslinking si woate ŋu atrɔ.

Nyati sia ƒo nu tso alesi microporous structure design of breathable Teflon (PTFE) high-temperature tape na ya ƒe gege ɖe eme kple nusiwo xea mɔ na ya kple nusiwo meléna o ƒe nɔnɔmewo da sɔ ŋu. Nu veviwo ƒe dzrewɔwɔ: ya ƒe gege ɖe eme bia be ʋuʋudedi naʋu, gake nusiwo xea mɔ na ya bia be woaƒo ƒu eye non-stick bia be woawɔ nusiwo le gbadzaa. Aɖaŋuɖoɖo ƒe mɔnu siwo da sɔ: akpɔ ʋuʋudedi ƒe didime le mama dedie nu (0.1-2μm, nyuitɔ kekeake <0.5μm) dzi be woaxe mɔ ɖe ʋuʋudedi ƒe gege ɖe eme nu eye woalé ʋuʋudedi ƒe ʋuʋudedi me ɖe asi; dziɖuɖu porosity le 50-70% (≈60% nyuitɔ kekeake) gbɔ ɖoɖo Gurley 20-100s / 100cc kple dielectric ŋusẽ ≥2kV na 0.13mm film; xɔ 3D network pore structure (τ≈2.5-4) si me tortuosity gã le be woatsɔ axe mɔ siwo dzi woɖea tsi le tẽe la nu; tu asymmetric gradient pore structure kple dense surface skin layer (1-5μm) na non-stick/insulation kple porous ememe na gbɔgbɔ; de super-oleophobic/hydrophobic anyigba dzi le atikewɔwɔ vɔ megbe evɔ pore blockage manɔmee.

Nyati sia na egbɔkpɔnu siwo wowɔ ɖe ɖoɖo nu hena mɔxexe ɖe adhesive ƒe nugbagbevi kple adhesive ƒe ʋu si dona nu ne wozã PTFE ƒe dzoxɔxɔ gã ƒe tape tsɔ kpɔa PCB sika asibidɛwo ta le SMT ƒe kpekpe me. Nusiwo gbɔ wòtso ƒe numekuku: nusiwo susɔ dzɔna tso cohesive kpododonu alo interfacial transfer me; ʋu dona tso viscosity drop kple adhesive overflow le reflow dzoxɔxɔ te. Core solution nye tape tiatia nyuie: silicone PSA kple ɣeyiɣi kpui aɖe ƒe taƒoƒo ≥300 ° C, yi edzi ≥260 ° C, blibo titrime 0.08-0.13mm kple tsɛ high-cohesion adhesive ƒuƒoƒo, kple anti-ʋu/nu susɔe-maɖe ɖaseɖigbalẽ. Afɔɖeɖe ade ƒe dɔwɔwɔ dzi kpɔkpɔ: dzadzɛnyenye do ŋgɔ na lamination kple IPA; zero-tension lamination kple ya ƒe ʋuʋu blibo; dzoxɔxɔ ƒe nɔnɔmetata si wowɔ nyuie wu le reflow me kple dzoxɔxɔ fafɛ (<2°C/s); vuvɔ ƒe ʋuʋu le 50°C te le 180° ƒe dzogoe dzi; dɔwɔwɔ enumake le gaƒoƒo 24 me eye woazãe zi ɖeka ko; kpododonu gbɔ kpɔkpɔ kple IPA tutu kple 40-50x magnifier ƒe ŋkuléle ɖe nu ŋu. Le PCB siwo ƒe axa eve le gome la, tsɔ kasɛt yeye ɖɔ li wo hafi nàwɔ dɔ le akpa evelia ŋu.