UHMWPE yog ib qho tseem ceeb ntawm cov khoom siv fiber ntau nrog qhov zoo xws li lub zog siab, siab modulus, siab toughness, thiab tsawg ntom. Nws yog dav siv hauv aerospace, tub rog, khoom siv ua kis las, thiab lwm yam. Cov txheej txheem tsim khoom feem ntau suav nrog cov kauj ruam xws li kev npaj cov khoom siv raw, cov tshuaj tiv thaiv polymerization, spinning, thiab ncab.
Kev tsim cov txheej txheem ntawm UHMWPE ua ntej yuav tsum tau npaj cov ntaub ntawv tsim nyog. Polyethylene yog polymerized los ntawm ethylene monomers, thaum UHMWPE yuav tsum tau tshwj xeeb polymerization txoj kev. Txoj kev siv feem ntau yog Ziegler Natta catalyst polymerization, qhov twg ethylene monomers undergo polymerization cov tshuaj tiv thaiv los tsim polyethylene chains nyob rau hauv qhov kev txiav txim ntawm catalyst.
Cov tshuaj tiv thaiv Polymerization yog ib kauj ruam tseem ceeb hauv kev tsim UHMWPE. Polymerization cov tshuaj tiv thaiv feem ntau yog ua tiav nyob rau hauv qhov kub thiab txias siab kom ntseeg tau tias kev nce qib ntawm cov tshuaj tiv thaiv thiab nce qib ntawm polymerization. Kev xaiv thiab ntau npaum li cas ntawm cov catalysts muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm cov tshuaj tiv thaiv polymerization. Cov catalysts uas nquag siv muaj xws li cov ntsiab lus xws li titanium, aluminium, thiab chlorine. Hauv cov tshuaj tiv thaiv polymerization, cov catalyst plays lub luag haujlwm hauv kev pib cov tshuaj tiv thaiv polymerization thiab ua kom cov txheej txheem polymerization ntawm ethylene monomers.
Tom qab cov tshuaj tiv thaiv polymerization tiav lawm, nws yuav tsum tau tig lub polymer. Spinning yog txheej txheem ntawm melting ib tug polymer thiab tsim fibers los ntawm ib tug spinning pore phaj. Cov duab thiab qhov pore loj ntawm spinning orifice daim hlau muaj qhov cuam tshuam loj rau kev tsim thiab cov khoom ntawm fibers. Feem ntau hais lus, qhov pore loj ntawm spinning pore board yuav tsum me dua li cov molecular loj ntawm cov polymer los xyuas kom meej lub uniformity thiab stretchability ntawm cov fibers. Thaum lub sij hawm spinning, nws yog ib qho tsim nyog los tswj qhov kub thiab txias ceev kom paub tseeb tias cov fibers zoo.
Tom qab spinning tiav, nws yog ib qho tsim nyog yuav tau ncab cov fibers. Stretching yog los txhim kho lub zog thiab modulus ntawm fibers ntxiv. Thaum lub sij hawm ncab, nws yog ib qho tsim nyog los tswj qhov kub thiab ceev kom tsis txhob muaj fiber ntau tawg. Cov fibers stretched undergo cov txheej txheem xws li txias thiab winding, thaum kawg tsim UHMWPE fibers.
Hauv cov ntsiab lus, kev tsim cov txheej txheem ntawm UHMWPE fibers suav nrog cov kauj ruam xws li kev npaj cov khoom siv raw, cov tshuaj tiv thaiv polymerization, spinning, thiab ncab. Cov tsis muaj thiab cov xwm txheej ntawm cov kauj ruam no muaj kev cuam tshuam loj rau qhov zoo thiab kev ua haujlwm ntawm fibers. Los ntawm kev tswj cov txheej txheem tsim nyog thiab cov xwm txheej, kev ua haujlwm siab UHMWPE fibers tuaj yeem tsim ua kom tau raws li qhov xav tau ntawm ntau qhov chaw.