Kutheni le nto i-PTFE iTeyiphu iGcina ukuncamathela kwayo ngaphandle kokusilela kwimo engqongileyo yobushushu obuphezulu?

I-PTFE iteyiphu yobushushu obuphezulu obuveliswe yi-Jiangsu Aokai New Materials isebenzisa i-adhesive ye-silicone yoxinzelelo, enokusebenza ngokuzinzileyo kwi-250 ° C ixesha elide. Ezona zizathu zisisiseko zezi ngongoma zintathu zilandelayo:

1. Ikhonkco eliPhambili liqulathe iiBond ze-Si–O ezinoBubushushu obuphezulu bokuBoleka kweThermal

Ikhonkco eliphambili le-molecular ye-silicone ye-adhesive-sensitive adhesive in PTFE high-temperature tape ine-Si O Si O isakhiwo. Amandla ebhondi yebhondi yeSi-O malunga ne-445 kJ / mol, ephezulu kakhulu kune-C-C bond (malunga ne-348 kJ / mol) okanye i-C-H bond (malunga ne-413 kJ / mol) kwiipolymers eziqhelekileyo ezifana ne-acrylates kunye neerubha.

Kubushushu obuphezulu, iibhondi ze-C-C ziqhawuka ngokulula kwaye ziqalise ukuthotywa kwekhonkco, kanti iibhondi ze-Si-O zifuna amandla aphezulu kakhulu ukuze zigqabhuke. Ngoko ke, i-molecular chain chain ye-silicone ye-PSA ihlala ihambelana ne-250 ° C, ukuphepha ukulahleka kokunamathela okubangelwa ukuchithwa kwe-thermal-oxidative.

2. I-Chemical Cross-Linking Network inqanda ukuthambisa kunye nokuhamba kwiqondo lokushisa eliphezulu

Irabha ye-silicone engaxutywanga ijika ibe lulwelo lwe-viscous kumaqondo obushushu aphezulu kwaye ilahlekelwe ngokupheleleyo amandla abambeneyo. Nangona kunjalo, i-silicone ye-PSA kwi-PTFE i-tape yobushushu obuphezulu idityanisiwe nge-peroxide crosslinking okanye i-platinum-catalyzed Ukongeza i-crosslinking, idibanisa i-linear chain chain kwi-network ene-dimensional stable.

Esi sakhiwo sinqamlezileyo sivumela umaleko wokubambelela ukuba ugcine ukuziphatha okuqinileyo kwe-elastic kwi-250 ° C ngaphandle kokunyibilika okanye ukugeleza njengezinto ze-thermoplastic. Nokuba iyancipha kancinci kwimodyuli, isawagcina amandla awoneleyo okubamba ukuxhathisa.

3. Ubushushu beGlasi ePhantsi (Tg ~ −120°C)

I-silicone ye-PSA kwi-PTFE iteyiphu yobushushu obuphezulu ine-Tg ephantsi kakhulu (malunga -120 ° C), okuthetha ukuba amatyathanga ayo emolekyuli ahlala ekwimo enwebekayo kakhulu kuluhlu olubanzi lobushushu ukusuka ku- -70 ° C ukuya kwi-300 ° C, kunokuba i-brittle glassy state.

Ngoko ke, kumaqondo obushushu aphezulu, i-adhesive layer ayiqini ukuze iphulukane namandla okumanzisa okanye ithambe ihambe ngokugqithisileyo. Igcina imodyuli ephakathi (imodyuli yogcino G' ≈ 10⁴–10⁶ Pa), eyona festile ilungileyo yokuncamathela okunoxinzelelo.

I-Silicone PSA ngokwayo inamandla aphantsi komhlaba (malunga ne-22 mN / m), eyenza ukuba imanzise ama-substrates asezantsi-amandla afana ne-PTFE kunye nerabha ye-silicone kakuhle nakwiqondo lokushisa eliphezulu - ukuthintela ukudibanisa okubangelwa ukuhambelana kwamandla omgangatho ophantsi.

Olu lwazi lungasentla lunikezelwe nguJiangsu Aokai New Materials Technology Co., Ltd.

Iiparameters ezineenkcukacha, iimeko zesicelo kunye nezisombululo ezicwangcisiweyo zoluhlu lwethu olupheleleyo lwemveliso - kubandakanywa i-PTFE i-high-temperature cloth, i-PTFE high-temperature tape, i-PTFE high-temperature mesh belt, ibhanti elingenamthungo lomatshini wokulambisa, ilaphu le-PTFE elinecala elinye, i-high-temperature resistant-conveyor-conveyor-conveyor-conveyor-iglasi

INombolo  yomnxeba weNkonzo: Mnu. Guo 18944819998 Mnu. Liu 13705266308

Ukubambelela kwifilosofi yenkonzo yobungcali kunye nemfezeko, sizinikele ekukuboneleleni ngezisombululo kunye nenkonzo enomdla!