Qhov sib txawv tseem ceeb ntawm meta thiab para aramid yog meta aramid yog ib nrab-crystalline, whereas para aramid yog crystalline.
Aramid (aromatic + amide) yog cov khoom siv polymer uas muaj ntau cov ntawv cog lus amide raws li rov ua dua. Yog li ntawd, peb tuaj yeem categorize nws li polyamide. Nws muaj tsawg kawg yog 85% ntawm nws cov ntawv cog lus amide txuas nrog cov nplhaib uas muaj ntxhiab. Muaj ob hom aramids li meta aramid, thiab para aramid thiab ob pawg no muaj cov khoom sib txawv nyob ntawm tus qauv.
Meta Aramid yog dab tsi?
Meta aramid yog ib qho polyamide uas muaj kev kub ntxhov siab. Cov meta aramid feem ntau hu ua Nomex®. Feem ntau, peb tsim cov khoom siv polymer no los ntawm kev ntub dej. Cov khoom ntawm txoj kev no yog cov khoom siv semi-crystalline fiber. Cov yam ntxwv tseem ceeb tshaj plaws ntawm meta aramid yog cov cua sov ua haujlwm, ua kom tsis muaj zog thiab ua haujlwm ntawm cov tshuaj degradation. Qhov siab tiv thaiv tshav kub ua rau meta aramid yog ib qho khoom siv zoo rau hluav taws xob rwb thaiv tsev kub tiv thaiv hauv tsheb. Ntxiv mus, peb feem ntau siv cov khoom siv no los tsim cov khaub ncaws tiv thaiv rau cov neeg tua hluav taws.
Daim duab 01: Nomex®
Tsis tas li ntawd, muaj ob hom kev sib txawv ntawm meta aramid raws li spun thiab nruam filament meta aramids. Daim ntawv spun-daim ntawv muaj txiaj ntsig zoo hauv kev tsim cov khaub ncaws thiab lwm yam kev siv xaws thaum daim ntawv txuas ntxiv yog qhov muaj txiaj ntsig zoo hauv daim ntawv thov kev txhawb zog.
Para Aramid yog dab tsi?
Para aramid yog hom polyamide muaj lub zog siab. Cov piv txwv feem ntau ntawm cov khoom siv no yog Kevlar®. Ntxiv mus, para aramid yog incredibly muaj zog. Cov txheej txheem ntau lawm rau cov khoom siv no yog qhuav-dav hlau ntub spinning txoj kev. Nws muab cov khoom siv crystalline zoo li cov khoom, uas ua rau lub zog siab ntawm cov khoom siv no.
Figure 02: Kevlar®
Para aramid kuj tuaj nyob rau hauv ob hom sib txawv raws li spun thiab nruam filaments. Tsis tas li ntawd, kev siv cov khoom siv no suav nrog kev tsim cov hnab looj tes tiv thaiv, hose reinforcement, thiab lwm yam.
Qhov txawv ntawm Meta thiab Para Aramid yog dab tsi?
Meta aramid yog polyamide muaj lub siab kub ua haujlwm thaum para aramid yog polyamide muaj lub zog siab. Qhov sib txawv tseem ceeb ntawm meta thiab para aramid yog meta aramid yog ib nrab-crystalline, thaum para aramid yog crystalline. Ntxiv mus, meta aramid yog tsim los ntawm ntub-spinning thaum para aramid yog tsim los ntawm qhuav-jet ntub spinning. Qhov piv txwv tshaj plaws rau meta aramid yog Nomex® thaum rau para aramid nws yog Kevlar®.
Hauv qab infographic qhia cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm meta thiab para aramid.
Summary – Meta vs Para Aramid
Meta aramid yog polyamide muaj lub siab kub ua haujlwm thaum para aramid yog polyamide muaj lub zog siab. Qhov sib txawv tseem ceeb ntawm meta thiab para aramid yog meta aramid yog ib nrab-crystalline, whereas para aramid yog crystalline.
