Kungani I-PTFE Tape Ingagcina Ukunamathela kwayo Ngaphandle Kokwehluleka Ezimweni Zezinga Lokushisa Eziphezulu?

Itheyiphu ye-PTFE yokushisa okuphezulu ekhiqizwe i-Jiangsu Aokai New Materials isebenzisa okunamathelisa okuzwela ukucindezela kwe-silicone, okungasebenza ngokuzinza ku-250°C isikhathi eside. Izizathu ezibalulekile zikula maphuzu amathathu alandelayo:

1. Iketango Eliyinhloko Liqukethe Amabhondi e-Si–O Anezinga Lokushisa Eliphezulu Lokubola

Iketango eliyinhloko le-molecular ye-silicone enamathelayo ezwela ukucindezela ku-PTFE itheyiphu yezinga lokushisa eliphezulu inesakhiwo se-Si O Si O. Amandla ebhondi ebhondi ye-Si–O cishe acishe abe ngu-445 kJ/mol, aphakeme kakhulu kunebhondi ye-C–C (cishe ama-348 kJ/mol) noma ibhondi ye-C–H (cishe 413 kJ/mol) kuma-polymers avamile afana nama-acrylate namarubha.

Emazingeni okushisa aphezulu, amabhondi e-C–C aphuka kalula futhi abangele ukuwohloka kweketango, kuyilapho amabhondi e-Si–O edinga amandla aphezulu kakhulu ukuze aqhume. Ngakho-ke, iketango eliyinhloko lamangqamuzana e-silicone PSA lihlala liqinile ku-250 ° C, ligwema ukulahlekelwa ukunamathela okubangelwa ukuwohloka kwe-thermal-oxidative.

2. Inethiwekhi Ye-Chemical Cross-Linking Ivimbela Ukuthamba Nokugeleza Emazingeni Okushisa Aphezulu

Irabha ye-silicone engaxhunywanga iphenduka uketshezi lwe-viscous emazingeni okushisa aphezulu futhi ilahlekelwe ngokuphelele amandla ahlangene. Nokho, i-silicone PSA ku-PTFE itheyiphu yokushisa okuphezulu ixhunywe nge-peroxide crosslinking noma i-platinum-catalyzed addition crosslinking, ixhuma amaketanga emolekyuli aqondile kunethiwekhi ezinzile yezinhlangothi ezintathu.

Lesi sakhiwo esixhumene sivumela ungqimba olunamathelayo ukuthi lugcine ukuziphatha okunwebekayo okuqinile ku-250°C ngaphandle kokuncibilika noma ukugeleza njengezinto ezisetshenziswayo ze-thermoplastic. Ngisho nokuncipha kancane kwe-modulus, isagcina amandla anele okuhlangana ukuze imelane nokuxebuka.

3. Izinga lokushisa eliphansi le-Glass Transition (Tg ~ −120°C)

I-silicone PSA ku-PTFE itheyiphu yokushisa okuphezulu ine-Tg ephansi kakhulu (cishe −120°C), okusho ukuthi amaketanga ayo amangqamuzana ahlala esesimweni esinwebeka kakhulu ebangeni elibanzi lokushisa ukusuka ku-−70°C kuya ku-300°C, kunesimo esiyingilazi esiphukayo.

Ngakho, emazingeni okushisa aphezulu, ungqimba olunamathelayo aluqini ukuze lulahlekelwe amandla okumanzisa noma luthambe lube ukugeleza ngokweqile. Igcina imodulus emaphakathi (imodulus yesitoreji G' ≈ 10⁴–10⁶ Pa), okuyiwindi elilungile lokunamathela okuzwela ukucindezela.

I-Silicone PSA ngokwayo inamandla aphansi angaphezulu (azungeze u-22 mN/m), eyivumela ukuba imanzise ama-substrates angaphansi komhlaba afana ne-PTFE kanye nerabha ye-silicone kahle ngisho nasezingeni eliphezulu lokushisa - ivimbela ukubola okubangelwa ukufana kwamandla angaphezulu.

Ulwazi olungenhla lunikezwe i-Jiangsu Aokai New Materials Technology Co., Ltd.

Ukuze uthole imingcele enemininingwane, izimo zohlelo lokusebenza nezixazululo ezenziwe ngokwezifiso zohlu lwethu olugcwele lomkhiqizo - kufaka phakathi indwangu ye-PTFE yokushisa ephezulu, i-PTFE itheyiphu yokushisa ephezulu, ibhande le-PTFE elinezinga eliphezulu lokushisa, ibhande elingenamthungo lemishini yokugcoba, indwangu ye-PTFE enohlangothi olulodwa, i-high-temperature resistant tape nge-glass-conveyor - sicela uxhumane nathi.

·  Inombolo Yezinkonzo: Mnu. Guo 18944819998 Mr. Liu 13705266308

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