Nini I-PTFE i-adhesive tape ephezulu yokushisa isetyenziswe kwizicelo ezibandakanya ukunyanzeliswa okuqhubekayo, ukunyanzeliswa kwamandla, okanye umthwalo oqhubekayo - njengokubamba i-insulation endaweni kumbhobho oshushu, okanye usebenze njengebhondi yesakhiwo phantsi koxinzelelo oluzinzileyo - ingxaki efihliweyo inokuvela: i-creep..
I-Creep kukucotha, ukuguqulwa okusisigxina kwemathiriyeli phantsi komthwalo oqhubekayo ngokuhamba kwexesha. Kwiqondo lobushushu begumbi, i-PTFE tape inokubonakala izinzile. Kodwa kwi-200 ° C okanye kwi-260 ° C - uluhlu oluqhelekileyo lokusebenza - i-adhesive layer ingathambisa kwaye ihambe, kwaye i-substrate ye-PTFE inokuhamba 'i-cold flow' (i-creep ngaphantsi kwendawo yayo yokunyibilika).
I-Aokai PTFE ivavanye indlela yokuziphatha erhubuluzayo kumawakawaka eeyure. Eli nqaku licacisa indlela i-creep evavanywa ngayo, indlela i-adhesive layer kunye ne-substrate nganye enegalelo ngayo, kunye nolwakhiwo lweteyiphu oluxhathisayo.
Yintoni iCreep kwi-PTFE Tape - Imilinganiselo emibini
I-Creep ibhekiselele kwimpendulo ye-viscoelastic yezinto. Umaleko wokuncamathelisa kunye nomsebenzi we-substrate ngeendlela ezahlukeneyo, ukanti zombini zichaphazela kakhulu ukuchasana noguquko.
Icandelo |
I-Creep Mechanism |
Imiba ephambili |
Umaleko wokuncamathelisa (isilicone PSA) |
Ukuhamba kweViscous phantsi koxinzelelo oluzinzileyo lokucheba |
Uxinaniso lweCrosslink, ubunzima bemolekyuli, ukomelezwa kokugcwalisa, ukutyeba kokutyabeka |
I-Substrate (ilaphu eligqunywe nge-PTFE) |
Ukuhamba okubandayo (i-polymer chain sliding) |
Ukuqiniswa kwe-Fiberglass, ukuguqulwa kokugcwalisa, umgangatho wokungena |
Umngeni wemeko yokusebenza: Iiteyiphu ze-PTFE zihlala zijongana nemithwalo rhoqo kwi-200-260 ° C, kude ngaphaya komda wokuncamathelisa okuqhelekileyo koxinzelelo. Uvavanyo olongezelelweyo lobushushu obuphezulu luyafuneka.
IiPropathi ezincamathelayo zomaleko-Silicone PSA
Uninzi lweeteyiphu ezincamathelayo ze-PTFE zamkela izinto zokuncamathelisa ezisekelwe kuxinzelelo lwe-silicone, ezinokumelana nokunyuka kobushushu obuphezulu kuxhomekeke kwezi zinto zilandelayo:
Umba |
Impembelelo kwiCreep Resistance |
Ulwalathiso olululo |
Uxinaniso lweCrosslink |
Iifom ezidityanisiweyo eziphezulu zigqibezela uthungelwano olulastiki → deformation esezantsi esisigxina |
Yandisa (kodwa hayi phezulu kangangokuba i-tack yokuqala ilahleke) |
Ubunzima bemolekyuli kunye nesakhiwo |
Ubunzima obuphezulu bemolekyuli + ivinyl/phenyl ukuguqulwa → ukuphuculwa kwamandla adibeneyo |
I-MW ephezulu, i-silicone ye-phenyl yobushushu obuphezulu |
Ukomelezwa kwesihluzi (umzekelo, isilica efumileyo) |
Yandisa kakhulu ukomelela okudityanisiweyo, yenza ukuba i-elastic rebound (efana nerabha) vs. flow viscous (njengetshungama) |
Yongeza i-5-15% yokuqinisa ukuzalisa |
Ukuncamathelisa ukutyabeka ubukhulu |
Umaleko otyebileyo uvumela ukutyibilika okungaphezulu kokucheba → ukuchwechwa okuphezulu phantsi komthwalo omnye |
Sebenzisa i-coat ebhityileyo, efanayo kwizicelo ezichasene ne-creep |
Ukunamathela kobuso |
Unxulumano olungekho mgangathweni lubangela ukuxobuka okuncamathelayo kwi-substrate → ukutyibilika kobuso obuphakathi (hayi ukurhubuluza okuninzi) |
Sebenzisa i-silicone primer, qinisekisa ubuso obucocekileyo |
Into ephambili yokuthatha: I-adhesive ye-silicone edityanisiweyo engaphantsi komnqamlezo inengxaki yokungaphumeleli ngokukhawuleza kumaqondo obushushu aphakamileyo. Iiteyiphu eziphambili ezichasene ne-creep zisebenzisa i-silicone ye-high-crosslink-density ene-reinforce fillers kunye ne-coating ephantsi elawulwayo.
I-Aokai PTFE iteyiphu yobushushu obuphezulu isebenzisa i-silicone ye-PSA enoxinano oluphezulu olunoxinzelelo lwe-silica. Uvavanyo oluzimeleyo lwe-shear ye-static kwi-260 ° C (umthwalo we-1000g, i-12.5 × 25 mm i-overlap) ibonisa> iiyure ze-150 ukungaphumeleli - zilungele ukufuna izicelo zokulayisha rhoqo ubushushu obuphezulu.
IiPropati zeSubstrate – PTFE Coated Fiberglass vs. IFilimu yePTFE enyulu
Ii-substrates ezimbini eziphambili zisetyenziselwa iiteyiphu ze-PTFE, ezinentsebenzo eyohluka kakhulu:
Uhlobo lweSubstrate |
I-Creep Resistance |
Inkqubo |
Ifilimu ye-PTFE ecocekileyo |
Ihlwempu - ilungele okwaziwayo ukuhamba okubandayo (ukuhamba okubandayo). Naphantsi kwemithwalo ethambileyo engagungqiyo engaphantsi kweqondo lokunyibilika (327°C), uguquko olukhulu olungajikiyo lwenzeka ngenxa yokutyibilika kwetsheyini yemolekyuli. |
Iipolymer ezingaqiniswanga → amatyathanga atyibilika adlulana phantsi koxinzelelo oluzinzileyo |
Ilaphu le-Fiberglass efakwe kwi-PTFE (eyona iphambili kwiteyiphu yobushushu obuphezulu) |
Okugqwesileyo - i-fiberglass skeleton ephothiweyo inqanda ngokufanelekileyo ukuhamba okubandayo kwe-PTFE |
Isakhiwo esihlanganisiweyo: iifiber zeglasi zithwala umthwalo, i-PTFE ibonelela ngokungahambi |
Kwi-fiberglass-reinforced substrate, ukuxhathisa kwe-creep kumiselwa ngu:
Umba |
Isiphumo |
Ubuninzi be-weave kunye nobukhulu |
Uxinaniso oluphezulu, amalaphu anobunzima obunzima → imodyuli ephezulu yokuqina → inkungu ephantsi |
I-PTFE elungisiweyo izaliswe |
Izongezo (i-fiberglass powder, igraphite, i-carbon fiber) ithintela i-PTFE intshukumo yemolekyuli → yomeleza ukuqina kwe-substrate kunye nokuxhathisa |
Unyango lwelaphu kunye nokumiliselwa ngokupheleleyo |
I-PTFE ene-sintered ngokupheleleyo igquma i-fiberglass iifom ezidityanisiweyo ezidityanisiweyo ukunqanda ukutyibilika kwe-interlayer shear. Ungenelelo olungonelanga → intsalela ye-PTFE ngaphakathi kwimesh zelaphu irhubuluza phantsi komthwalo |
Ubukhulu be-Substrate & flatness |
Iisubstrates ezityebileyo, ezithe tyaba ngokulinganayo → ubulukhuni obuphezulu obuguquguqukayo → nokusasazwa koxinzelelo → kuthintela ukurhubuluza kwalapha kwangaphambi kwexesha kuxinzelelo |
I-away takeaway: Ukulayisha rhoqo ubushushu obuphezulu, ungaze usebenzise iteyiphu yefilimu ye-PTEF esulungekileyo - iya kurhubuluza ngokungenakujikwa. Soloko ukhetha iteyiphu ye-PTFE ye-fiberglass-yomelezwe.
Isishwankathelo-Ukuqinisekisa njani ukuxhathisa kwi-PTFE Tape
Umba |
Yintoni omawuyijonge |
Yintoni Omele Uyiphephe |
Uhlobo lokuncamathelisa |
I-silicone ye-PSA ephezulu ye-crosslink ene-fumed silica filler |
I-silicone edityanisiweyo ngaphantsi, i-acrylic PSA (ihamba ngesantya esisezantsi) |
Ubungqingqwa bokuncamathelisa |
I-Thin, i-uniform coating (ithagethi 0.02-0.05 mm) |
Umaleko oncamathelayo otyebileyo (> 0.08 mm) - uvumela ukutyibilika kwe-chear |
Uhlobo lweSubstrate |
I-Fiberglass-yomelezwe i-PTFE |
Ifilimu ye-PTFE ecocekileyo (izinto ezibandayo ezibandayo) |
Umgangatho weSubstrate |
I-High-density weave, ifakwe ngokupheleleyo, i-sintered ngokupheleleyo |
I-weave ekhululekileyo, ukufakwa okunganelanga, i-sintered kancinci |
Ukudibanisa ubuso |
Unyango oluphambili phakathi kwe-adhesive kunye ne-substrate |
Akukho primer → ukuncamathelisa ukuxobula endaweni yokurhubuluza isambuku |
Isindululo esisebenzayo: Kusetyenziso olungaguquguqukiyo lobushushu obuphezulu (umzekelo, ukugqunywa kombhobho wokugquma phantsi koxinzelelo, ukubamba amalungu kwiiplateni ezishushu), cela idatha yokucheba engatshintshiyo kubushushu obuthile kunye nomthwalo wakho. Cacisa iteyiphu ye-PTFE ye-fiberglass, hayi iteyiphu yefilimu. Qinisekisa ukuba i-adhesive yi-silicone ephezulu ye-crosslink-density ene-filler.
Isishwankathelo , ukuxhathisa kwe-PTFE yobushushu obuphezulu be-adhesive tape phantsi komthwalo oqhubekayo wexesha elide kuxhomekeke kumacandelo amabini. Umaleko we-silicone we-PSA kufuneka ube noxinaniso oluphezulu lwe-crosslink, i-filters yokuqinisa (i-silica evuthayo), kunye ne-coat uniform ebhityileyo ukuxhathisa ukuhamba kwe-viscous. I-substrate kufuneka ibe yi-fiberglass-reinforced PTFE - ifilimu esulungekileyo ye-PTFE iya kungena kwindawo ebandayo engapheliyo kumaqondo obushushu aphezulu. I-fiberglass skeleton ithwala umthwalo kwaye igcina idimensional dimensional izinzile.
Xa ukhetha iteyiphu ye-PTFE yezicelo eziqhubekayo zobushushu obuphezulu, ungaze uzinze kwiteyiphu yefilimu ye-PTFE esulungekileyo. Soloko ucela idata yokucheba engatshintshiyo kwiqondo lobushushu lakho lokusebenza. Kwaye khumbula: ikhonkco phakathi kwe-adhesive kunye ne-substrate imicimbi nayo - i-interfaces ephathwayo inqanda ukutyibilika kobuso.
Ngaba ufuna iteyiphu yePTFE enganyangekiyo yomthwalo wobushushu obuphezulu? I-Aokai PTFE ibonelela ngetape eqiniswe nge-fiberglass ene-silicone ye-PSA ephezulu ye-crosslink-density, engqinwe ngovavanyo lwe-260 °C lokucheba oluzinzileyo. Qhagamshelana nathi ngomthwalo wakho, ubushushu, kunye neemfuno zobude bexesha.
Inqaku linikezelwe ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba ufuna ezinye iinkcukacha, izikhokelo zesicelo, kunye nezisombululo ezilungiselelwe ulungelelwaniso lwethu olupheleleyo lwemveliso kubandakanya i-PTFE ilaphu elinobushushu obuphezulu, i-PTFE iteyiphu encamathelayo, ibhanti lokuhambisa umnatha we-PTFE, ibhanti le-fuser elingenamthungo, ilaphu le-PTFE elinecala elinye, ibhanti lokuhambisa elinobushushu obuphezulu kunye ne-fiberglass enganyangekiyo kwilaphu lokunxibelelana nathi,
Sibambelela kubuchwephesha kunye nemfezeko, ezinikeleyo ekuhambiseni izisombululo ezilungiselelweyo kunye nenkxaso emva kokuthengisa!
