I-Silicone Adhesive Tg Ikuthinta Kanjani Ukusebenza Kwetheyiphu ye-PTFE Emazingeni Okushisa Aphansi

Uke wazama ukusebenzisa itheyiphu evamile efrijini? Iphenduka iqine, ilahlekelwe ukunamathela, futhi iyaqhekeka lapho igobile. Ngoba Itheyiphu ye-PTFE yokushisa ephezulu esetshenziswa ezindaweni ezinezinga lokushisa eliphansi - ukusuka endaweni ebandayo ukuya kumapayipi e-cryogenic - izinga lokushisa lengilazi elinamathelayo (Tg) lenza umehluko.

Ingcina ye-silicone ezwela ukucindezela ine-Tg ephansi kakhulu ecishe ibe -120°C . Lesi yisizathu esifihliwe esenza ukuthi itheyiphu ye-PTFE ihlale iguquguquka futhi inamathela emazingeni okushisa aphansi njenge -70°C.

I-Aokai PTFE isifunde kabanzi lesi sakhiwo. Lesi sihloko sichaza isayensi ngemuva kwe-Tg nokuthi ithinta kanjani ukusebenza kwe-tape ezimweni ezibandayo.

Yini I-Glass Transition Temperature (Tg) futhi Kungani Ibalulekile?

Izinga lokushisa lokushintsha kwengilazi (Tg) indawo lapho ipholimeri ishintsha khona ukusuka esimweni esithambile, esiyiraba ukuya esimweni esiyingilazi esiqinile . Lapho izinga lokushisa lehla ngaphansi kwe-Tg, amaketanga e-polymer molecular aba yiqhwa, alahlekelwe uketshezi kanye nekhono lokunamathela.

Okunamathelayo okuzwela ukucindezela:

• Ngenhla kwe-Tg: Amaketango ahamba ngokukhululeka → ingcina ihlala ithambile, inamathela, futhi ingaba manzi indawo

• Ngezansi kwe-Tg: Amaketanga aba yiqhwa → ingcina iyaqina, ilahlekelwa ukunamathelana, futhi iba brittle

Kungani i-silicone PSA ikhethekile: I-Tg yayo engu -120°C iphansi kakhulu uma iqhathaniswa nezinamatheliso ze-acrylic (Tg cishe -20°C kuya ku-30°C). Lokhu kusho ukuthi i-silicone ihlala inwebeka futhi inamathele ebangeni lokushisa elibanzi kakhulu - ukusuka ku-70°C kuya ku-260°C.

Ubudlelwano phakathi kwe-Tg nokusebenza kwe-adhesive akuyona into elula yokuvula/ukuvala. Ngisho no-30 ° C ngaphezu kwe-Tg, ukuhamba kwamangqamuzana kusalinganiselwe; okunamathelayo kungase kube 'isikhumba' kunokuba kube injoloba ngokugcwele. Kuzinhlelo zokusebenza zetheyiphu ye-PTFE ngaphansi -50°C, okunamathelayo kufanele kugcine i-'rubbery plateau' modulus phakathi kuka-10⁴ no-10⁶ Pa. I-Silicone PSA ifinyelela lokhu phansi cishe ku- -80°C ngenxa yomgogodla wayo we-siloxane oguquguqukayo (–Si–O–Si–). Izinamatheliso ze-Acrylic, ezinomgogodla we-carbon-carbon oqinile, ngokuvamile zilahlekelwa ukunamathela ngaphansi -30°C. Lokhu kuchaza ukuthi kungani kunconyelwa kuphela amateyipu e-PTFE asekelwe ku-silicone okufakwa efrijini (-30°C kuya ku-0°C) noma ezindaweni ezikhalayo.

I-Microscopic Influence Mechanism ye-Tg ku-PTFE Tape

Konke ukusebenza kwezinga lokushisa eliphansi kwe- PTFE itheyiphu yokushisa okuphezulu kunqunywa ngokuhlanganyela kokubili ungqimba olunamathelayo kanye ne- PTFE substrate . I-PTFE ngokwayo nayo ine-Tg ecishe ibe -120°C - efana ngokuphawulekayo ne-silicone PSA.

Ukuqonda okubalulekile: Inqobo nje uma izinga lokushisa lesevisi lihlala lingaphezu kwe-Tg (isb, -70°C, elingu-50°C ngaphezu kuka-120°C), kokubili okunamathelayo ne-substrate kuhlala kusesimweni esinwebeka kakhulu, okuqinisekisa ukuguquguquka okuhle kakhulu kwezinga lokushisa eliphansi nokunamathela okuzinzile.

Ilebhu yokuhlaziya okushisayo ye-Aokai PTFE iqinisekise ukuthi i-silicone PSA igcina ngaphezu kuka-80% wamandla ekhasi lezinga lokushisa legumbi ku -70°C, kuyilapho i-acrylic PSA ilahlekelwa ngaphezu kuka-90% ngaphansi -30°C. Le datha ihambisana nomehluko we-Tg.

Ekusetshenzisweni kwangempela kwe-cryogenic (isb., itheyiphu yemaski yokufafaza kweplasma yezinga lokushisa eliphansi noma ukulungiswa kwesikhashana ku-liquid nitrogen dewars), abasebenzisi bavame ukusola ngephutha ifilimu ye-PTFE ngokuqhekeka lapho umlandu wangempela kuwukunamathela. Lapho okunamathelayo kuba yiqhwa ngaphansi kwe-Tg yayo, ilahlekelwa ukuthobela futhi ayikwazi ukumunca ingcindezi egobile. I-strain bese idlulela ku-PTFE substrate, engase isaguquguquka, kodwa ungqimba oluqinile lwe-adhesive lusebenza njengesigxili sokucindezeleka, siqala ukuqhekeka kusixhumi esibonakalayo se-adhesive-substrate. Isixazululo akukona ukusebenzisa ifilimu ye-PTFE ewugqinsi, kodwa ukuqinisekisa ukuthi ingcina ihlala ngaphezu kwe-Tg yayo. Ezimweni ezimbi kakhulu ze-cryogenic ezingaphansi kuka -150 ° C, ngisho ne-silicone PSA iba i-marginal. Ezimweni ezinjalo, kunconywa ukubopha ngomshini (ama-clamps, izikulufu) noma amateyipu we-PTFE anganamatheli, njengoba ayikho i-PSA engasebenza ngaphansi kuka -180°C.

Umthelela Ekunamatheleni Kwezinga Lokushisa Eliphansi Nokuvumelana nezimo

1. Ukunamathela Emazingeni Okushisa Ahlukene

2. Ukuguquguquka Kwezinga Eliphansi

I-Ultra-low Tg (-120°C) yenza okunamathelayo kugcine ukunwebeka nokuthambile ngisho naku-70°C, kuvimbele ngempumelelo ukuqhekeka okuphukayo. Itheyiphu ingagotshwa, isongwe, futhi ilimaze ngokukhululekile ngaphandle kokuphuka okuphukayo - ngokungafani namateyipu anamathelayo ajwayelekile aqhekeka ezindaweni ezibandayo.

Isifinyezo Nezinkombandlela Zokusebenza

Izinga lokushisa eliphansi lengilazi yokuguqulwa kwe-silicone PSA yenza i-PTFE itheyiphu yokushisa ephezulu igcine i-viscosity ezinzile kanye nokuguquguquka ngaphansi kwezimo zezinga lokushisa eliphansi.

Umhlahlandlela wokukhetha ngokwebanga lokushisa:

Amanothi Okugcina Nokusebenzisa:

• Gcina itheyiphu ngokwe-hermetically ezindaweni ezipholile, ezomile ngokwemininingwane yobuchwepheshe

• Uma ufaka izinga lokushisa eliphansi (isb, ukufaka itheyiphu endaweni ebandayo), shisa kuqala kokubili itheyiphu nendawo yokubopha ukuze uthuthukise ukunamathela kokuqala.

• Gwema ukufaka itheyiphu ngaphansi kuka-0°C ngaphandle kokufudumala - ngisho ne-silicone i-PSA idinga ukuthintana kokuqala ngenhla kwe-Tg ukuze imanzise kahle.

Kafushane , izinga lokushisa eliphansi lengilazi eliphansi kakhulu (-120°C) lokunamathelisa okuzwela ukucindezela kwe-silicone yikho okwenza i-PTFE itheyiphu yezinga lokushisa eliphezulu ifaneleke ngokukhethekile indawo ebandayo ne-cryogenic. Nakuba amateyipu e-acrylic ehluleka ngaphansi -30°C, itheyiphu ye-PTFE esekelwe ku-silicone ihlala iguquguquka futhi inamathela kuze kufike ku--70°C - futhi ingasinda emazingeni okushisa aphansi kakhulu ngokunamathela okuncishisiwe.

Eziningi zezinhlelo zokusebenza ezibandayo zasembonini (iziqandisi, okokusebenza kweketango elibandayo, ukufakwa kwangaphandle ebusika), itheyiphu ye-PTFE ejwayelekile ene-silicone PSA isebenza ngokuthembekile. Ngomsebenzi ojulile we-cryogenic, thintana nochwepheshe - futhi ucabange ukulungisa imishini ngaphansi kuka -150°C.

Udinga itheyiphu ye-PTFE ukuze usebenzise izinga lokushisa eliphansi? I-Aokai PTFE inikeza amamaki ajwayelekile naguquliwe ezindaweni ezibandayo ezahlukahlukene. Xhumana nethimba lethu lezobuchwepheshe ngebanga lokushisa lakho kanye nomjikelezo womsebenzi.

Ikhishwe yi-Jiangsu Aokai New Materials Technology Co., Ltd.

Ukuze uthole imingcele enemininingwane, izimo zohlelo lokusebenza, nezixazululo ezenziwe ngokwezifiso zemikhiqizo yochungechunge olugcwele kufaka phakathi indwangu yokushisa ephezulu ye-PTFE, itheyiphu yokushisa ephezulu ye-PTFE, ibhande le-PTFE elinenetha, ibhande lokuhlanganisa elingenamthungo, indwangu ye-PTFE enohlangothi olulodwa, ibhande lokuhambisa elimelana nokushisa okuphezulu nendwangu ye-fiberglass , sicela usithinte:

• UMnu. Guo: +86 18944819998

• UMnu. Liu: +86 13705266308

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