Dab tsi yog cov txheej txheem ntau lawm ntawm ePTFE membrane?

1. Raw khoom xaiv thiab npaj:
Xaiv qhov tsim nyog PTFE resin raws li cov khoom siv raw, thiab ntxiv cov khoom siv extrusion (xws li roj nplua nyeem) raws li xav tau los pab txhawb kev ua haujlwm tom ntej.
2. Extrusion molding:
Tom qab sib tov PTFE resin thiab extrusion pab, nws yog extruded rau hauv ib zaj duab xis los ntawm ib tug extruder. Thaum lub sij hawm tus txheej txheem no, cov yeeb yaj kiab extruded tuaj yeem calendered kom tau qhov xav tau tuab thiab cov khoom nto.
3. Kev kho kom qhuav:
Cov yeeb yaj kiab extruded yuav tsum tau qhuav kom tshem tawm cov roj nplua nyeem thiab lwm yam khoom tsis zoo hauv nws los npaj rau cov txheej txheem txuas ntxiv thiab sintering.
4. Unidirectional lossis bidirectional ncab:
Cov zaj duab xis qhuav yog longitudinally stretched ntawm qhov kub thiab txias (feem ntau tsawg dua 320 degree) los tsim ib qho qauv ePTFE uas muaj cov nodes thiab microfibers. Cov kauj ruam no yog tus yuam sij rau kev tsim cov qauv microporous ntawm ePTFE membrane. Cov txheej txheem ncab yog muab faib ua unidirectional stretching thiab bidirectional stretching:
Unidirectional stretching: Zaj duab xis yog stretched raws lub tshuab kev taw qhia (MD).
Bidirectional stretching: Tom qab cov zaj duab xis yog longitudinally stretched, nws yog stretched nyob rau hauv lub transverse kev taw qhia (TD) los txhim kho lub mechanical zog thiab porosity ntawm daim nyias nyias.
5. Sintering fixation: Lub stretched zaj duab xis yog sintered ntawm ib tug tej yam kub los kho lub microporous qauv. Sintering feem ntau yog nqa tawm hauv qab lub melting point ntawm PTFE los xyuas kom meej ib feem orientation ntawm cov molecules nyob rau hauv lub stretching kev taw qhia.
6. Txias thiab winding: Lub sintered ePTFE membrane yuav tsum tau txias rau hauv chav tsev kub thiab tom qab ntawd kis mus rau hauv ib lub yob rau kev ua thiab daim ntawv thov.
7. Kev kho tom qab: Lub npoo ntawm ePTFE membrane tuaj yeem kho plasma raws li xav tau los hloov cov khoom nto, xws li ua rau nws hydrophilic. Tsis tas li ntawd, ePTFE membrane tuaj yeem muab cov khoom siv tshwj xeeb los ntawm cov txheej txheem los yog cov tshuaj sib txuas.