Nini I-PTFE high-temperature adhesive tape isetshenziswa ezinhlelweni ezibandakanya ukungezwani okuqhubekayo, amandla okuqinisa, noma umthwalo oqhubekayo - njengokubamba i-insulation endaweni epayipini elishisayo, noma ukusebenza njengesibopho sesakhiwo ngaphansi kwengcindezi engaguquki - inkinga efihliwe ingavela: ukukhasa..
I-Creep ukuwohloka okuhamba kancane, okuhlala njalo kwento engaphansi komthwalo oqhubekayo ngokuhamba kwesikhathi. Ezingeni lokushisa legumbi, itheyiphu ye-PTFE ingase ibonakale izinzile. Kodwa ku-200°C noma ngisho no-260°C - ububanzi bayo obujwayelekile bokusebenza - ungqimba olunamathelayo lungathamba futhi lugeleze, futhi i-PTFE substrate ingangena 'ukugeleza okubandayo' (ingene ngaphansi kwendawo yayo yokuncibilika).
I-Aokai PTFE ihlole ukuziphatha okunyakazayo ezinkulungwaneni zamahora. Lesi sihloko sichaza ukuthi i-creep ihlolwa kanjani, ukuthi ungqimba olunamathelayo kanye ne-substrate ngayinye inikela kanjani, nokuthi yiziphi izakhiwo zetheyiphu ezimelana nokuhamba kahle.
Yini I-Creep ku-PTFE Tape - Ubukhulu obubili
I-Creep ibhekisela ekuphenduleni kwe-viscoelastic yezinto zokwakha. Isendlalelo sokunamathisela nomsebenzi we-substrate ngezindlela ezihlukene, nokho zombili zithinta kakhulu ukumelana nokuguquguquka okuphelele.
Isakhi |
I-Creep Mechanism |
Izici Eziyinhloko |
Isendlalelo esinamathelayo (i-silicone PSA) |
Ukugeleza kwe-viscous ngaphansi kwengcindezi ye-shear eqhubekayo |
Ukuminyana kwe-Crosslink, isisindo samangqamuzana, ukuqiniswa kokugcwalisa, ukujiya kokunamathela |
I-Substrate (indwangu ehlanganisiwe ye-PTFE) |
Ukugeleza okubandayo (i-polymer chain sliding) |
Ukuqiniswa kwe-Fiberglass, ukuguqulwa kwesigcwalisi, ikhwalithi yokungena |
Inselele yesimo sokusebenza: Amateyipu e-PTFE avame ukubhekana nemithwalo engashintshi ku-200-260°C, kude kakhulu nomkhawulo wezinto ezinamathelayo ezizwela ingcindezi. Kudingeka ukuhlolwa okunwetshiwe kwezinga lokushisa eliphezulu.
I-Adhesive Layer Properties - I-Silicone PSA
Amateyipu amaningi anamathelayo e-PTFE athatha izinto ezinamathelayo ezizwela ukucindezela ezisekelwe ku-silicone, ukumelana kwazo nezinga lokushisa eliphezulu kuncike ezintweni ezilandelayo:
Isici |
Umthelela ku-Creep Resistance |
Isiqondiso Esilungile |
Ukuminyana kwe-Crosslink |
Amafomu okuxhumanisa okuphezulu agcwalisa inethiwekhi enwebekayo → ukuwohloka okuphansi okungapheli |
Khulisa (kodwa hhayi phezulu kangangokuthi i-tack yokuqala ilahlekile) |
Isisindo samangqamuzana nokwakheka |
Isisindo samangqamuzana aphezulu + ukuguqulwa kwe-vinyl/phenyl → amandla okuhlangana athuthukisiwe |
I-MW ephakeme, i-phenyl silicone yokushisa okuphezulu |
Ukuqiniswa kokugcwalisa (isb, i-silica evuthayo) |
Ithuthukisa kakhulu amandla okuhlangana, yenza i-elastic rebound (njengerabha) iqhathaniswa nokugeleza kwe-viscous (njengoshingamu) |
Engeza u-5-15% wokugcwalisa ukuqinisa |
Ukujiya okunamathelayo |
Isendlalelo esiwugqinsi sivumela ukushelela kwe-shear okwengeziwe → ukuhamba okuphezulu ngaphansi komthwalo ofanayo |
Sebenzisa i-coat encane, efana ne-anti-creep applications |
Ukunamathela kobuso |
Ukungahlanganisi kahle kubangela ukuxebuka okunamathelayo ku-substrate → ukushelela phakathi kobuso (hhayi ukukhahlaza okuningi) |
Sebenzisa i-silicone primer, qinisekisa indawo ehlanzekile |
I-takeaway engukhiye: I-adhesive ye-silicone exhunywe ngaphansi kwe-crosslink inenkinga yokukhuphuka ngokushesha emazingeni okushisa aphakeme. Amateyipu e-Premium anti-creep asebenzisa i-silicone ye-crosslink-density ephezulu enezigcwalisi eziqinisayo kanye ne-coating elawulwayo emincane.
Itheyiphu ye- Aokai PTFE yokushisa okuphezulu isebenzisa i-silicone ye-PSA ephezulu ye-crosslink-density enokuqiniswa kwe-silica evuthayo. Ukuhlola okuzimele kwe-shear ku-260°C (umthwalo ongu-1000g, ukugqagqana okungu-12.5×25 mm) kubonisa > amahora angu-150 ukwehluleka – kulungele ukufuna izinhlelo zokusebenza ezilayisha njalo izinga lokushisa eliphezulu.
Izakhiwo Ze-Substrate – PTFE Coated Fiberglass vs. Pure PTFE Film
Ama-substrates amabili ajwayelekile asetshenziselwa amateyipu e-PTFE, asebenza ngokunyenya okuhluke kakhulu:
Uhlobo lwe-Substrate |
I-Creep Resistance |
Indlela |
Ifilimu ye-PTFE ehlanzekile |
Impofu - ijwayele okwaziwayo ukugeleza okubandayo (i-cold creep). Ngisho nangaphansi kwemithwalo ethambile engaguquki ngaphansi kwendawo yokuncibilika (327°C), ukuguga okukhulu okungalungiseki kwenzeka ngenxa yokushelela kweketango lamangqamuzana. |
I-polymer engaqinisiwe → amaketango ayashelela adlula amanye ngaphansi kwengcindezi eqhubekayo |
Indwangu ye-Fiberglass efakwe i-PTFE (ebusa itheyiphu yokushisa okuphezulu) |
Okuhle kakhulu - i-fiberglass skeleton elukiweyo ivimbela ngempumelelo ukugeleza okubandayo kwe-PTFE |
Isakhiwo esiyinhlanganisela: imicu yengilazi ithwala umthwalo, i-PTFE inikeza i-non-stick |
Nge-fiberglass-reinforced substrate, ukumelana ne-creep kunqunywa yilokhu:
Isici |
Umphumela |
Weave ukuminyana kanye ukushuba |
Izindwangu eziminyene kakhulu, ezinesisindo esisindayo → imodulus eqinile ephezulu → ukukhasa okuphansi |
I-PTFE egcwalisiwe elungisiwe |
Izithasiselo (impushana ye-fiberglass, i-graphite, i-carbon fibre) zikhawulela ukunyakaza kwamangqamuzana e-PTFE → zikhuphula ukuqina kwe-substrate kanye nokumelana nokukhuphuka |
Ukwelashwa kwendwangu nokufakwa ngokugcwele |
I-PTFE ene-sintered ngokugcwele encapsulating ngokuphelele i-fiberglass amafomu ayinhlanganisela ehlanganisiwe ukugwema ukushelela kwe-interlayer shear. Ukufaka okunganele → i-PTFE esele ngaphakathi kwendwangu yendwangu ingena ngaphansi komthwalo |
Ubukhulu be-substrate & flatness |
Ama-substrates awugqinsi, ayisicaba ngokulinganayo → ukuqina okuguquguqukayo okuphezulu → ngisho nokusatshalaliswa kwengcindezi → kuvimbela ukungena kwasendaweni ngaphambi kwesikhathi ekugxiliseni ingcindezi |
Ukhiye wokuthatha: Kuzinhlelo zokusebenza ezilayisha njalo izinga lokushisa eliphezulu, ungalokothi usebenzise itheyiphu yefilimu ye-PTEF emsulwa - izonyonyobela ngokungenakuhlehliswa. Njalo khetha itheyiphu ye-PTFE eqiniswe yi-fiberglass.
Isifinyezo - Ungakuqinisekisa Kanjani Ukuphikiswa Kwe-Creep ku-PTFE Tape
Isici |
Okufanele Ukubheke |
Okufanele Ukugweme |
Uhlobo lokunamathela |
I-silicone ye-PSA ephezulu ye-crosslink-density ene-fumed silica filler |
I-silicone e-under-crosslinked, i-acrylic PSA (ikhasa emazingeni okushisa aphansi) |
Ukujiya okunamathelayo |
Izacile, i-uniform coating (thagethi 0.02-0.05 mm) |
Isendlalelo esinamathelayo esiwugqinsi (>0.08 mm) - sivumela ukushelela kwe-shear |
Uhlobo lwe-substrate |
I-PTFE eqiniswe nge-Fiberglass |
Ifilimu ye-PTFE ehlanzekile (ama-cold creeps) |
Ikhwalithi ye-substrate |
I-high-density weave, ifakwe ngokugcwele, ifakwe ngokuphelele |
I-loose weave, ukumilisa okunganele, i-sintered kancane |
Ukuxhumana phakathi kobuso |
Ukwelashwa kokuqala phakathi kwe-adhesive ne-substrate |
Ayikho i-primer → ukucwecwa okunamathelayo esikhundleni sokukhasa ngobuningi |
Isincomo esisebenzayo: Kuzinhlelo zokusebenza ezilayisha njalo izinga lokushisa eliphezulu (isb., ukugoqa kwepayipi lokufakwa ngaphansi kwengcindezi, ukubamba izingxenye zamapuleti ashisayo), cela idatha ye-shear emile ezingeni lokushisa lakho elithile kanye nomthwalo wakho. Cacisa itheyiphu ye-PTFE eqiniswe yi-fiberglass, hhayi itheyiphu yefilimu. Qinisekisa ukuthi i-adhesive iyi-silicone ye-high-crosslink-density ene-filler.
Ngamafuphi , ukumelana nokunyakaza kwetheyiphu yokunamathela yezinga eliphezulu ye-PTFE ngaphansi komthwalo ongaguquki wesikhathi eside kuncike ezingxenyeni ezimbili. Isendlalelo se-silicone se-PSA kufanele sibe nokuminyana okuphezulu kwe-crosslink, izigcwalisi eziqinisayo (i-silica evuthayo), kanye nokwembozwa kweyunifomu emincane ukumelana nokugeleza kwe-viscous. I-substrate kumele ibe yi-fiberglass-reinforced PTFE - ifilimu ye-PTFE ehlanzekile izongena emanzini abandayo angenakulungiseka emazingeni okushisa aphezulu. I-fiberglass skeleton ithwala umthwalo futhi igcina inhlanganisela zizinzile ngokwengxenye.
Uma ukhetha itheyiphu ye-PTFE yezinhlelo zokusebenza ezilayisha njalo izinga lokushisa eliphezulu, ungalokothi uvumele itheyipu yefilimu ye-PTFE emsulwa. Hlala ucela idatha ye-shear emile ezingeni lokushisa lakho lokusebenza. Futhi khumbula: isibopho phakathi kwe-adhesive kanye ne-substrate nezindaba - izindawo zokusebenzelana ezilashwe nge-primer zivimbela ukushelela kobuso.
Udinga itheyiphu ye-PTFE enganqamuki ukuze ulayishe njalo izinga lokushisa eliphezulu? I-Aokai PTFE inikeza itheyipu eqiniswe nge-fiberglass ene-silicone ye-PSA ephezulu ye-crosslink-density, eqinisekiswe ngokuhlolwa kwe-shear okumile okungu-260°C. Xhumana nathi ngezidingo zakho zomthwalo, izinga lokushisa, nobude besikhathi.
Isihloko sinikezwe ngu I-Jiangsu Aokai New Materials Technology Co., Ltd.
Uma udinga ukucaciswa okwengeziwe, imihlahlandlela yohlelo lokusebenza, nezixazululo ezenziwe ngokwezifiso zohlelo lwethu oluphelele lomkhiqizo ohlanganisa i-PTFE indwangu esezingeni lokushisa eliphezulu, iteyiphu enamathelayo ye-PTFE, ibhande le-PTFE mesh conveyor, ibhande le-fuser elingenamthungo, indwangu ye-PTFE enohlangothi olulodwa, ibhande lokuhambisa elimelana nezinga lokushisa eliphezulu kanye ne-fiberglass engashisi ukuze usithinte:
Sithobela ubungcweti nobuqotho, esizinikezele ekuletheni izixazululo ezenziwe ngokwezifiso endaweni eyodwa kanye nokwesekwa okucabangelayo kwangemva kokuthengisa!
