Nukae nye agbɔsɔsɔme ƒe sɔsɔ le gel fraction index si le silicone pressure-sensitive adhesives kple adhesive layer ƒe cohesive ŋusẽ dome?

I. Dzesiwo ƒe Gɔmeɖeɖe kple Dzidzedzemɔnu

1. Gel ƒe akpa sue aɖe:

   Gel ƒe akpa suea fia agbɔsɔsɔme ƒe alafa memamã si le crosslinked network si le silicone pressure-sensitive adhesive si wofa ɖe edzi la me Teflon ƒe dzoxɔxɔ gã ƒe tape si me mekɔna le atike nyuiwo (abe toluene ene) me o. Dzidzenua bia be woaxatsa nusi wotsɔ léa nu dzadzɛa ɖe nusi wotsɔna tsia nu me, aɖee le Soxhlet-nuɖemɔ̃ me gaƒoƒo 24, eye emegbe woatsɔ nusiwo susɔ si me mekɔ o la aƒu gbe vaseɖe eƒe kpekpeme si nɔa anyi ɖaa hafi abu akɔnta.

2. Ŋusẽ si le ɖekawɔwɔ me:

   Le Teflon tape me la, ŋusẽ si le ɖekawɔwɔ me ƒe dzesi enye dzoxɔxɔ gã si léa nu ɖe ​​te (shear adhesion failure temperature alo shear holding time). Zi geɖe la, wowɔa dodokpɔa le dzoxɔxɔ 180 °C me le agba si ƒe kpekpeme nye kilogram 1 te, eye woŋlɔa ɣeyiɣi si woatsɔ awɔe vaseɖe esime nusi léna ɖe nu ŋu la ƒu alo do kpo nu. Asixɔxɔ sia ɖea ŋutete si le nusi wotsɔna léa nu ɖe ​​nu ŋu be wòatsi tre ɖe sisi kple mama ŋu fiana tẽ.

II. Agbɔsɔsɔme ƒe Sɔsɔ le Gel Fraction Kple Cohesive Ŋusẽ Dome

1. Le teƒe vevitɔa te (gel fraction < 60%):

   Nuɖoanyia mewɔ ɖoɖo si me tsi sina toa tsia me haɖe o; nusi léna ɖe nu ŋu la gakpɔtɔ le nɔnɔme si me tsi le si me tsi le me, eye ŋusẽ si léa nu ɖe ​​te gogo zero eye ŋusẽ si woate ŋu atsɔ ablae la meli o.

2. Nusiwo woate ŋu awɔ (60%-85%):

   Le nya vevitɔa godo la, elastic chain density si wɔa dɔ nyuie dzina ɖe edzi ŋutɔ ne gel ƒe akpaa le eme, eye cohesive ŋusẽ dzina ɖe edzi le mɔ si sɔ nu alo le ŋusẽ gã ƒe se aɖe dzi wɔwɔ me. Gel ƒe akpa suea dzi ɖeɖe kpɔtɔ tso 60% va ɖo 70% ate ŋu ana dzoxɔxɔ gã ƒe ɣeyiɣi si woatsɔ alée ɖe dzi tso miniti va ɖo gaƒoƒo; tso 70% va ɖo 80% la, ŋusẽ si wotsɔ léa nu ɖe ​​te ate ŋu adzi ɖe edzi zi gbɔ zi 3 va ɖo 10 bubu. Dodokpɔ ƒe nɔnɔmea trɔna vivivi tso kpododonu si keke ta si me ɖekawɔwɔ le gbɔ va zua kpododonu si wotsaka.

3. Crosslinking ƒe didime kɔkɔ (> 85%):

   Ŋusẽ si le ɖekawɔwɔ me ƒe dzidziɖedzi dzi ɖena kpɔtɔna. Gel ƒe akpa suea dodo ɖe dzi tso 85% va ɖo 95% dzia ɣeyiɣi si woatsɔ alée ɖe edzi 20%–50% ko, gake tack (gbãtɔ ƒe adhesion) ɖiɖina ŋutɔ le molecule ƒe kɔsɔkɔsɔ ƒe ʋuʋu si seɖoƒe li na ta. Ne gel ƒe akpa suea wu 95% la, nusi léna ɖe nu ŋu la gogo elastomer ƒe nɔnɔme dzadzɛ, eye nusi léna ɖe nu ŋu ƒe nɔnɔme siwo sea nyaƒoɖeamenu gɔme la buna vevietɔ.

III. Semi-Empirical Model kple Nyatakaka Siwo Wozãna Typical

Abe alesi Jiangsu Teflon avɔ siwo ƒe dzoxɔxɔ lolo wɔlawo gblɔe kpuie ene la, woate ŋu aɖe ƒomedodo si le nuteƒekpɔkpɔ me le shear holding time (t_shear) kple gel fraction (g) dome afia abe:

lg(t_shear) = A + B · g (si me B anɔ abe 0.1–0.2 ene), si fia be eɖoa ŋu ɖe xexlẽdzesiwo ŋu. A kple B ƒe asixɔxɔwo nɔ te ɖe MQ resin ƒe xexlẽme, adhesive layer ƒe titrime, kple dodokpɔ ƒe dzoxɔxɔ dzi.

Nyatakaka siwo sɔ kple wo nɔewo zi geɖe (180 °C static shear, normalized to a holding time of 1 le 65% gel fraction):

| Gel ƒe akpa sue aɖe | Ɣeyiɣi si Wolé Ðe Asi Le Ƒomedodo Me | Dodokpɔ ƒe Nɔnɔme |

|---------------|

| 55% ƒe xexlẽme | < 0.1 ƒe xexlẽme | 100% ɖekawɔwɔ ƒe kpododonu |

| 65% ƒe xexlẽme | 1 | ~80% ɖekawɔwɔ ƒe kpododonu |

| 75% ƒe xexlẽme | 8–15 ƒe ɣeyiɣiwo | Dodokpɔ si wotsaka |

| 85% ƒe xexlẽme | 50–100 ƒe xexlẽme | Nusiwo susɔ vie |

| 92% ƒe xexlẽme | 150–200 (si gogo saturation) | Dzadzɛ interfacial kpododonu |

 

Edze ƒã be le 60%–90% ƒe domedome la, gel ƒe akpa 5 ƒe dzidziɖedzi ɖesiaɖe si nye alafa memamã 5 ate ŋu ana dzoxɔxɔ gã ƒe ɖekawɔwɔ ƒe ŋusẽ nadzi ɖe edzi zi gbɔ zi geɖe.

IV. Mɔnu Siwo Wozãna Le Teflon Tape Wɔwɔ Me

1. Taɖodzinu gel ƒe akpa sue aɖe ƒe didime:

   Le taɖodzinu gbadzaa ƒe dzoxɔxɔ-tsitretsitsi ƒe ʋuʋudedi tapes tso Jiangsu Teflon dzoxɔxɔ gã avɔ wɔlawo, wokafu gel fraction nye 75%–85%, dadasɔ tack kple ɖekawɔwɔ. Le dzoxɔxɔ gã ƒe anti-stick conveyor belts (siwo woate ŋu atsɔ agba ɣeyiɣi didi le 200–260 °C) gome la, ele be gel ƒe akpa suea naɖo 85%–93% be woaxe mɔ ɖe adhesive ƒe nugbagbevi siwo tso adhesive layer ƒe mama ɖekae gbɔ.

2. Interface ƒe sɔsɔ ƒe nudidiwo:

   Teflon ƒe dzoxɔxɔ gã ƒe tape ƒe PTFE ƒe anyigba ƒe anyimeŋusẽ le sue ŋutɔ; eyata ele be nusi wotsɔ léa nu ɖe ​​nu ŋu ƒe ŋusẽ si léa nu ɖe ​​nu ŋu la nakɔ wu ŋusẽ si le nulénu si le wo nɔewo dome; ne menye nenema o la, ɖekawɔwɔ ƒe kpododonu adzɔ le nuteɖeamedzi te. Ne gel ƒe akpa suea wu 93% la, adhesive layer la sesẽna, si ɖea tsidzadza dzi kpɔtɔna eye wòsɔna ɖe PTFE substrate la nu, si ate ŋu ana woakɔ nugbɔ. Le ewɔwɔ me la, ele vevie be woakpɔ crosslinking dzoxɔxɔ, ɣeyiɣi, kple catalyst ƒe agbɔsɔsɔme dzi pɛpɛpɛ be woaxe gel ƒe akpa suea ɖe taɖodzinu ƒe didime nu, si ana woakpɔ tɔtrɔ si ŋu kakaɖedzi le tso cohesive kpododonu dzi ayi interfacial failure dzi.

Nyatakaka siwo le etame la tso... Jiangsu Okai Yeye Nuwo Mɔ̃ɖaŋununya Co., Ltd.

Ne èdi be yeanya nu geɖe tso nusiwo wowɔ tsitotsito, dɔwɔwɔ ƒe nɔnɔmewo, kple tiatia siwo woate ŋu atrɔ asi le na míaƒe adzɔnuwo ƒe hatsotso bliboa ŋu—siwo dometɔ aɖewoe nye Teflon avɔ siwo ƒe dzoxɔxɔ lolo, Teflon ƒe dzoxɔxɔ gã ƒe kasɛtwo, Teflon ƒe dzoxɔxɔ gã mesh belts, adhesive-free seamless belts for laminators, single-sided PTFE fabrics, high-temperature conveyor alidziblanu, avɔ siwo wotsɔa fiberglass wɔe siwo ƒe dzoxɔxɔ deŋgɔ, kple bubuwo—taflatse miate ŋu aƒo ka na mí faa to nya siwo gbɔna dzi:

Ƒo ka na míaƒe subɔsubɔdɔa ƒe kaƒoƒo:

- Aƒetɔ Guo: 18944819998

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Míeléa subɔsubɔ ƒe xexemenunya si wotu ɖe dɔnyala kple fɔmaɖimaɖi dzi me ɖe asi ɣesiaɣi, eye míetsɔ mía ɖokui na be míana egbɔkpɔnuwo le teƒe ɖeka kple subɔsubɔdɔ si me woalé ŋku ɖo la wò!