Ŋusẽ si léa nu ɖe asi – ŋutete si le adhesive tape ŋu be wòatsi tre ɖe shear stress ŋu eye wòanɔ teƒea le agba madzudzɔmadzudzɔe te, vevietɔ le dzoxɔxɔ si kɔ me – nye dɔwɔwɔ ƒe xexlẽdzesi vevitɔwo dometɔ ɖeka na PTFE ƒe dzoxɔxɔ gã si wotsɔ léa nu ɖe nu ŋu ƒe kasɛt . Ŋusẽ si meléa nu ɖe te nyuie o hea kasɛt la ƒua du, nusiwo léna ɖe nu ŋu ƒe nugbagbevi susɔe, kple ɖiƒoƒo dɔwɔnuwo.
Gɔmeɖose vevitɔ si woatsɔ ana ŋusẽ si léa nu nanyo ɖe edzi la nye nu eve: woado ŋusẽ si le nulénu ƒe ƒuƒoƒoa ƒe ɖekawɔwɔ ŋu eye woado ŋusẽ ŋusẽ si le nulénu la kple PTFE ƒe gɔmeɖoanyi dome le dometsotso me.
Aokai PTFE trɔ asi le nutsyɔtsyɔ kple dɔyɔyɔ siaa ƒe mɔnuwo ŋu nyuie wu be woakpɔ asiléle ƒe dɔwɔwɔ si de ŋgɔ wu gbɔ. Mɔfiame sia ƒo nu tso egbɔkpɔnu siwo wowɔ ɖe ɖoɖo nu le nuwo wɔwɔ ƒe akpa vevi eve siawo me ŋu.
Coating Process Optimization – Gɔmeɖoanyia tutu
Nutsyɔtsyɔ ƒe ɖoɖoa ɖoa wɔwɔme, titrime ƒe ɖekawɔwɔ, kple kadodoŋusẽ kple nusi le ete la tẽ – gɔmeɖoanyi na ŋusẽ nyuitɔ kekeake si léa nu.
1. Primer coating – egbɔkpɔnu vevitɔ na PTFE ƒe adhesion manyomanyo
PTFE ɖea ŋusẽ si le anyigba dzi si bɔbɔ ŋutɔ (18-20 dynes/cm) fiana, si wɔnɛ be nusi léna ɖe nu ŋu la te ŋu ƒua gbe vevie le dzoxɔxɔ gã ƒe lãɖeɖe ƒe nuteɖeamedzi te. Ele be woawɔ primer coating process hafi woatsɔ adhesive atsyɔ edzi.
Primer tiatia: Woxɔa silane coupling agents alo silicone primers tɔxɛwo (solution siwo wotsɔ tackifying resin kple reactive silane tsaka) le afisiafi. Le silicone PSA si wotsɔ da dɔe si wotsɔ kpe ɖe eŋu gome la, wolɔ̃a vinyl alo epoxy functional silane-based primers.
Dɔwɔwɔ dzi kpɔkpɔ ƒe nya veviwo:
Ultra-thin primer film: Kpɔ dry film ƒe titrime dzi le 0.5–2 μm me – primer si gbɔ eme wɔa liƒo ƒe ƒuƒoƒo si gbɔdzɔ si ɖea ŋusẽ si léa nu dzi kpɔtɔna.
Do ŋgɔ na ƒuƒu si sɔ: Tsɔ atike si wotsɔna ƒoa tsii la ƒu gbe bliboe eye nàtsɔe awɔ gbãtɔ ƒe tsinyenye/crosslinking bliboe hafi nàtsɔe atsyɔ edzi, si axe mɔ na primer solvent ƒe ʋuʋu yi etame adhesive la me.
In-line surface treatment + primer coating: Wɔ internet dzi plasma alo corona dɔdamɔnu ɖe PTFE substrate dzi enumake hafi primer zazã be nàƒo asa na attenuation of surface activation.
Zi geɖe la, ŋusẽ si léa nu ɖe asi dzina ɖe edzi ne nusi léna ɖe nu ŋu ƒe titrime, ke hã, nutsyɔnu si le kpekpem akpa nana nulénu ƒe ʋuʋu nu sẽna ɖe edzi le dzoxɔxɔ gã me eye wògbɔdzɔa nuléle ƒe dɔwɔwɔ me le mɔ si trɔna nu.
Adhesive ƒuƒu ƒe titrime nyuitɔ: Silicone PSA kpɔa ŋusẽ nyuitɔ kekeake si léa nu ɖe te le titrime ƒuƒu si nye 30–60 μm.
Mɔnu siwo wozãna tsɔ blaa nu pɛpɛpɛ: Zã comma coating, slot die coating, alo micro gravure coating si sɔ pɛpɛpɛ ŋutɔ be wòana didime kple axadzi ƒe titrime ƒe mɔɖeɖe ɖe nu ŋu nanɔ ±2 μm . Titrime si mesɔ o hea nuteɖeamedzi ƒe ƒuƒoƒo vɛ, si wɔnɛ be gbagbã dzea egɔme tso teƒe si le tsɛ wu le ŋusẽ si léa nu ƒe dodokpɔ me.
3. Adhesive tsi pretreatment kple nuɖuɖu ɖoɖo
Vacuum defoaming: Degas adhesive liquid le vacuum te le wo tsakatsaka vɔ megbe alo hafi woatsyɔ edzi be woaƒo asa na ʋuʋudedi siwo kekena le wo dada me, siwo wɔa dɔ abe teƒe siwo wodzea gbagbã gɔme le le agba si nɔa anyi ɖaa te.
Le fli me tsakatsaka kple tsitsi: Le akpa eve silicone adhesive gome la, de static mixer na nuɖuɖu tẽ eye nàkpɔ tsi ƒe nɔƒe ɣeyiɣi dzi be nàkpɔ egbɔ be gbãtɔ ƒe nuwɔna ɖekae eye nàɖe nutoa me gbɔdzɔgbɔdzɔ cohesive teƒewo ɖa.
Dzadzɛnyenye dzi kpɔkpɔ: De nutsyɔnu ƒe tawo ŋu kple nusiwo me ke mate ŋu age ɖo o eye nàɖe tsi si léna ɖe nu ŋu to 5–10 μm filter cartridges dzi be woaxe mɔ ɖe ɖiƒoƒo suesuesue siwo hea nuteɖeamedzi ƒe ƒuƒoƒo vɛ nu.
Volatilize solvent kple ɣeyiɣi si sɔ; ƒo asa na anyigbadzi ŋutigbalẽ ɖeɖe kabakaba si léa ememe solvent
Dzoxɔxɔ si le titina ƒe nɔnɔmewɔwɔ
120–140°C ƒe dzoxɔxɔ
Wɔ gbãtɔ crosslink network, na gbãtɔ mɔ̃ɖaŋu ŋusẽ, yi ŋgɔe ɖe residual solvent ɖa
Dzoxɔxɔ gã ƒe crosslinking goglo
150–220°C (woate ŋu atrɔ asi le eŋu le nusi wotsɔna léa nu ɖe nu ŋu ƒe ƒomevi nu)
Crosslinking bliboe bliboe; dzoxɔxɔ dzi kpɔkpɔ pɛpɛpɛ le vevie ŋutɔ
Gɔmesese vevi aɖe: Dzoxɔxɔ afɔɖeɖe ɖesiaɖe nana be woate ŋu awɔ akpa etɔ̃ ƒe kadodo ɖeka, si le ʋeʋẽm le aŋea me, si naa nuléle ƒe ŋutete si de ŋgɔ sã wu ne wotsɔe sɔ kple abolomegba si wowɔna le dzoxɔxɔ gã me le afɔɖeɖe ɖeka me. Dzoxɔxɔ si mesɔ gbɔ o hea crosslinking si mesɔ o kple cohesive layer falɛfalɛ vɛ; dzoxɔxɔ si gbɔ eme ate ŋu ahe adhesive tsitsi alo ememe nuteɖeamedzi gã aɖe tso dzoxɔxɔ ƒe ʋuʋu si mesɔ o gbɔ.
2. Atikewɔwɔ le dɔyɔyɔ kple tsitsi megbe
In-line post-curing: Ðo dzodoƒe ƒe akpa si keke hafi nàƒoe kple dzoxɔxɔ si bɔbɔ vie wu crosslinking ƒe dzoxɔxɔ si de ŋgɔ wu be wòadidi dzoxɔxɔ ŋutinya ɖe edzi eye nàwɔ crosslinking reaction bliboe.
Roll maturation curing: De abi ƒe tape rolls dzodoƒe si ƒe dzoxɔxɔ nɔa anyi ɖaa ( 40–60°C hena gaƒoƒo 24–48 ) be woadzra wo ɖo le teƒe ɖeka. Dɔwɔwɔ sia:
Ewua crosslinking ƒe nuwɔna susɔea nu blewu
Eɖea nuteɖeamedzi ememetɔ si dzoxɔxɔ ƒe kekeɖenudɔwɔwɔ si mesɔ o si le substrate kple adhesive dome hena vɛ la dzi kpɔtɔna
Enaa agbatsɔtsɔ ƒe dɔwɔwɔ ɣeyiɣi didi le dzoxɔxɔ gã me nyona ɖe edzi ŋutɔ
Staged tension annealing: De cyclic tension vi aɖe ɖe rolled tape dzi le tsitsi me be wòakpe ɖe nuteɖeamedzi ƒe dodo ŋu.
3. Yame ƒe nɔnɔme kple nutome dzi ɖuɖu ƒe dɔyɔyɔ
Nutoa me si me fafa mele o dzi kpɔkpɔ: Le silicone adhesive si daa tsidzadza me gome la, tsi si le yame si sɔ la kpɔa gome le crosslinking me, gake fafa si gbɔ eme nana eƒe ŋutigbalẽ ƒuna kabakaba eye wòxea mɔ na eƒe dɔyɔyɔ goglo. Silicone-nulénu si wotsɔ daa dɔe bia be woaɖe sulfur kple atike siwo me nitrogen le ɖe vovo vevie be woaxe mɔ ɖe aɖi si naa nu ʋãna la nu.
PTFE film la te ŋu didina eye dzoxɔxɔ ƒe ʋuʋu le dzoxɔxɔ gã me.
Low-tension conveyance: Na substrate tension ɣesiaɣi eye wòanɔ sue wu le dzodoƒea me be nàƒo asa na curing le adhesive nɔnɔme si keke me. Le fafa megbe la, substrate shrinkage subjects adhesive to persistent compressive/shear ememe nuteɖeamedzi – si ɖea ŋusẽ si léa nu dzi kpɔtɔna ŋutɔ.
Dzoxɔxɔ do ŋgɔ na anyigba: Do dzo na PTFE anyigba la wòakɔ vie wu tsi si wotsɔ léa nu ɖe nu ŋu ƒe dzoxɔxɔ hafi nàtsyɔ edzi be wòana nusi wotsɔ blae ƒe tsidzadza nanyo ɖe edzi eye wòaɖe dzoxɔxɔ ƒe ʋuʋu sesẽ si le dzodoƒea ƒe gege ɖe eme dzi akpɔtɔ.
Kpuie ko la – Coating kple Curing Optimization Checklist
Esɔ gbɔ na condensation-cure; ƒo asa na aɖi siwo naa nu ʋãna hena atike si wotsɔ kpe ɖe eŋu
Tension dzi ɖuɖu
Dzodoƒe ƒe teteɖeanyi
Nu suetɔ kekeake, ɣesiaɣi (ƒo asa na keke ɖe enu le dɔyɔɣi) .
Substrate ƒe dzoxɔxɔ do ŋgɔ
Hafi woatsɔ nu atsyɔ nu edzi
Ewu dzoxɔxɔ si wotsɔ léa nu ɖe nu ŋu vie
Aokai PTFE zãa nutsyɔtsyɔ kple dɔyɔyɔ ƒe mɔnu siawo siwo wowɔ nyuie wu tsɔ wɔa PTFE adhesive tape si ƒe ŋusẽ de ŋgɔ wu be wòalé wo ɖe te. Le asisi siwo hiã be woawɔ dɔ tɔxɛ aɖe le asiléle le dzoxɔxɔ si kɔ me gome la, míate ŋu atrɔ asi le primer ƒe atikewo, adhesive ƒe titrime, kple curing profiles ŋu be wòawɔ ɖe wò nudidiwo dzi.
