Tsim Adhesive Layer Structure rau Wide-Temperature-Range PTFE High-Temperature Tapes

Qhov dav-kub-ntau PTFE daim kab xev yuav tsum muaj kev ntseeg siab ntawm -70 ° C (los yog qis dua) thiab muaj sia nyob tsis tu ncua ntawm 200-260 ° C - ib ntu ntawm tshaj 300 ° C. Qhov no thov kom muaj cov nplaum nplaum uas tseem hloov tau yam tsis muaj kev sib koom ua ke tsis ua haujlwm lossis kev cuam tshuam ntawm kev sib tshuam ntawm qhov kawg.

Cov nplaum txheej feem ntau yog tshwj xeeb silicone siab-rhiab nplaum nplaum (PSA) coated rau saum npoo-hloov PTFE films lossis PTFE-impregnated fiberglass ntaub. Tus yuam sij rau kev ua haujlwm ruaj khov nyob thoob plaws lub qhov rais qhov kub thiab txias yog nyob rau hauv kev tsim kom muaj kev sib haum xeeb - tus qauv tsim uas sib npaug ntawm qhov kub thiab txias, qhov kub thiab txias tsis kam, thiab thermal shock kam rau ua.

Aokai PTFE tau tsim dav-kub PTFE tapes siv cov qauv hauv qab no. Tsab ntawv xov xwm no piav qhia txog plaub lub ntsiab lus tseem ceeb: kev hloov txheej txheem, dej hiav txwv-kob biphasic microstructure, gradient crosslinking, thiab kub-stabilized composite fillers.

Hloov Cov Txheej Txheem Txheej Txheem ntawm Substrate thiab Adhesive Layer

1. Qhov kev sib tw tseem ceeb - PTFE nto zog

PTFE nta tsis tshua muaj zog nto (18-20 dynes / cm). Cov txheej txheem ncaj qha ntawm cov nplaum yuav tev tawm thaum lub sij hawm thermal cycling vim tsis sib haum xeeb thermal expansion coefficients - PTFE nthuav 30-40x ntau dua fiberglass.

2. Nto qhib thiab primer anchoring

Yuav kom daws tau qhov no, PTFE nto undergoes tshuaj etching nrog sodium-naphthalene complexes los yog plasma kev kho mob los qhia C = C ob daim ntawv cog lus thiab oxygen-muaj pawg polar. Tom qab ntawd, ib qho ultra-thin tshwj xeeb silicone primer (piv txwv li, vinyl-muaj silane coupling tus neeg sawv cev) yog siv los ua ib tug 'molecular choj' ntawm qhov sib txuas ntawm cov tshuaj sib txuas.

3. Stress-buffering interlayer

Nyob rau hauv tej yam formulations, ib tug tsawg-modulus, high-ductility elastic intermediate txheej (gel-zoo li silicone nrog saj zawg zog ntu) yog muab tso rau ntawm lub activated txheej thiab lub ntsiab nplaum txheej. Qhov no absorbs interfacial kev nyuaj siab induced los ntawm ntse kub hloov thiab tiv thaiv ntug lifting ntawm cov nplaum.

Hiav txwv-Island Biphasic Microstructure Regulation

Lub ntsiab nplaum matrix yog ib qho classic PSA system uas muaj MQ silicone resin (dispersed kob theem) thiab high-molecular-yuag polysiloxane (nruam hiav txwv theem).

1. MQ silicone resin – nyuaj kob theem

Muab cohesion, tuav lub zog, thiab siab-kub creep kuj. Kev tswj xyuas meej ntawm nws qhov M / Q molar ratio (feem ntau 0.6-0.9) thiab particle loj dispersion ua kom zoo ib yam embedding nyob rau hauv lub nruam theem los tsim lub cev crosslinking qhov chaw.

2. Polysiloxane nruam theem - mos hiav txwv theem

Muab cov tack ceev, tsis tshua muaj dej ntub dej, thiab yoog raws. High-molecular-weight methyl vinyl silicone roj hmab los yog methyl phenyl vinyl silicone roj hmab feem ntau xaiv.

3. Kev ua kom zoo tshwj xeeb rau qhov kub thiab txias

Ib qho me me ntawm high-phenyl-cov ntsiab lus siloxane ntu tau muab tso ua ke. Phenyl pawg inhibits qhov kub thiab txias crystallization ntawm polydimethylsiloxane, txo cov nplaum lub brittleness kub hauv qab -100 ° C. Lub caij no, phenyl pawg txhim kho thermal-oxidative degradation tsis kam ntawm qhov kub thiab txias, ua rau lub hiav txwv txuas ntxiv kom khaws tau siab elasticity hla lub qhov rais kub.

Multi-Layer los yog Gradient Crosslinking Tsim rau Thermal Shock Resistance

Ib txheej txheej txheej txheej txheej ob txheej yog saws kom sib npaug siab-kub creep tsis kam thiab qis-kub tackiness:

1. Sab hauv txheej (substrate sab)

Relatively high crosslink density , delivering robust high-temperature holding power and cohesive strength as a shear-resistant framework.

2. Txheej txheej (bonding nto)

Ultra-low crosslink ntom ntom nrog cov xov tooj ntawm tes molecular heev, ua kom ceev ceev wetting ntawm adherends ntawm qis kub thiab txaus pib tack.

Xwb, ib qho kev sib txuas tsis tu ncua ntawm crosslink ceev los ntawm sab hauv mus rau sab nrauv yog tsim nyob rau hauv ib txheej ntawm kev kho cov txheej txheem, seamlessly integrating nruj thiab saj zawg zog ua hauj lwm cheeb tsam.

Aokai PTFE siv gradient crosslinking thev naus laus zis los xyuas kom meej tias daim kab xev tseem hloov tau ntawm -70 ° C (ua kom pib tack thiab conformability) thaum tuav lub zog cohesive ntawm 260 ° C (tiv thaiv kev nkag mus thiab nplaum nplaum).

Thaum tshav kub kub-Stabilized Composite Fillers

Nano-scale fumed silica yog finely dispersed nyob rau hauv lub adhesive matrix rau ntxiv dag zog, ua ke nrog ob pawg ntawm functional fillers:

1. Thaum tshav kub kub-resistant additives

Cerium oxide, hlau oxide, thiab lwm yam radical scavengers inhibit oxidative hardening ntawm siloxane sab chains thiab pob txha degradation nyob rau hauv high kub. Cov tshuaj antioxidants no txuas ntxiv lub neej kev pab ntawm 260 ° C.

2. Thermal conductive fillers

Micron-loj aluminium nitride, alumina , thiab lwm yam., sai sai dissipate tshav kub kom txo tau cov cua sov sab hauv thiab qeeb aging. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov ntawv thov uas cov kab xev siv los ua cov thermal interface lossis qhov chaw ua kom sov los ntawm cov substrate tuaj yeem ua kom cov nplaum degradation.

Tag nrho cov fillers yuav tsum tau deg passivation los yog silane kev kho mob kom tsis txhob overmodulus nce thiab nplaum hardening ntawm tsawg kub.

Summary - Ib Qhov Kev Hloov Kho Network rau Cov Kev Cai Loj

Cov nplaum txheej ntawm qhov dav-kub-ntau PTFE tapes yog qhov tseem ceeb ntawm platinum-catalyzed ntxiv crosslinking microphase-sib cais network kos nrog MQ resin tshuaj anchoring qhov chaw thiab hybrid phenyl long-chain siloxanes. Los ntawm gradient crosslinking thiab co-crosslinking technologies, nws zoo kawg nkaus koom ua ke:

• Kev ntub dej nrawm thiab hloov tau yooj yim ntawm qhov kub thiab txias

• Muaj zog cohesion thiab anti-oxidation kev ua tau zoo ntawm qhov kub thiab txias

... nyob rau hauv ib txheej txheej elastic nplaum, ua tau raws li qhov xav tau ntawm kev siv dav dav-kub-ntau yam.

Aokai PTFE manufactures dav-kub PTFE tapes siv no nplaum system tsim. Kev cai tshwj xeeb - suav nrog thickness, crosslink gradient, thiab muab tub lim - muaj rau cov kev xav tau tshwj xeeb.

Tsab ntawv xov xwm no yog muab los ntawm Jiangsu Aokai Tshiab Khoom Siv Technology Co., Ltd.

Yog hais tias koj xav kawm cov ncauj lus kom ntxaws specifications, daim ntawv thov scenarios thiab customized kev daws teeb meem rau peb tag nrho cov khoom lineup, xws li PTFE high-temperature fabrics, PTFE adhesive tapes, PTFE mesh conveyor siv, seamless fusing tshuab siv, ib leeg-sided PTFE coated daim ntaub, high-temperature resistant conveyor txoj siv sia, thov hu rau peb ntawm high-temperature channel.

• Mr. Guo: +86 18944819998

• Mr. Liu: +86 13705266308

Peb ua raws li kev pabcuam lub tswv yim ntawm kev tshaj lij thiab kev ncaj ncees, mob siab rau muab koj nrog ib qho kev daws teeb meem thiab kev xav txhawb nqa!