Dab tsi yog microstructural yam ntxwv ntawm Teflon high-temperature ntaub?

I. Substrate Skeleton: iav Fiber Weaving Texture

1. Warp-Weft Interwoven Structure

Cov npuag yog woven los ntawm ntau cov iav fiber ntau yarns hauv tiaj, twill, los yog lwm yam weaves los ua ib tug mesh skeleton, nrog ib tug monofilament diameters xws li los ntawm ob peb microns mus rau ntau tshaj kaum microns, thiab ib tug du nto.

2. Siab Porosity

Ua ntej txheej, muaj ntau micron-scale pores ob qho tib si nyob rau hauv lub fiber bundles thiab ntawm warp-weft kev sib tshuam nodes, muab chaw rau PTFE impregnation tom ntej.

II. Txheej Morphology: Lub 'Island-Coating' Structure ntawm PTFE

1. Tag nrho Impregnation Encapsulation

PTFE resin nkag mus rau hauv qhov sib txawv ntawm txhua tus neeg filament, tsim ib 'reinforced qhob'-type composite, qhov twg cov iav fibers ua hauj lwm raws li lub reinforcing theem thiab PTFE ua hauj lwm raws li lub nruam matrix. Hauv ntu ntu, cov fibers tuaj yeem pom tusyees kos rau hauv cov resin.

2. Nto Nodular Microstructure

Cov ntshiab PTFE nto nthuav tawm qhov sib txawv network morphology ntawm nodules (particles) interconnected los ntawm zoo fibrils, tsim los ntawm kev sib sau ua ke ntawm folded-chain lamellae thaum lub sij hawm sintering txheej txheem, uas imparts non-stick thiab nws tus kheej-lubricating zog rau cov khoom.

3. Nruam daim tawv nqaij txheej

Cov txheej txheej saum npoo yog enriched nrog ntshiab PTFE, tsim ib tug ntom, iav-fiber-dawb daim tawv nqaij zaj duab xis ob peb mus rau kaum ntawm microns tuab, uas ua hauj lwm raws li qhov tseem ceeb barrier rau tshuaj inertness, tsis-stick zog, thiab hluav taws xob rwb thaiv tsev.

III. Qhov tseem ceeb tsis xws luag: Microporosity thiab Interface yam ntxwv

1. Residual Micropores

Tsis tiav impregnation los yog shrinkage thaum lub sij hawm sintering yuav tawm micron-scale voids los yog tawg nyob rau hauv nruab nrab ntawm fiber bundles thiab interweaving nodes, ua rau txo qis kev ua tau zoo thiab tshuaj tiv thaiv.

2. Interface Bonding

Cov iav fibers thiab PTFE yog incompatible; microscopically, du pits tshuav los ntawm fiber ntau rub tawm tuaj yeem pom. Los ntawm kev sib txuas tus neeg saib xyuas kev kho mob lossis kev sib cuam tshuam kev sib txuas, PTFE nruj nreem khi cov fibers, txhim kho interfacial bond zog.

IV. Condensed State Yam ntxwv: Semi-Crystalline Structure

1. Spherulites thiab Banded Crystals

PTFE yog semi-crystalline polymer. Tom qab ib txwm sintering, nws nthuav tawm kev sib koom ua ke ntawm spherulites thiab banded crystals, nrog crystallinity feem ntau yog li ntawm 50% mus rau 70%, thiab zoo-ordered molecular saw saw.

2. Cov nyhuv ntawm Crystallinity

High crystallinity endows cov khoom nrog lub sij hawm ntev tshav kub tsis kam mus txog 260 ° C thiab tsis tshua muaj kub-kub creep. Over-sintering los yog under-sintering tuaj yeem ua rau cov crystalline txawv txav, ua rau lub neej ua haujlwm luv.

Cov ntaub ntawv saum toj no yog muab los ntawm Jiangsu Aokai Tshiab Khoom Siv Technology Co., Ltd.

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