Melt-blown lim feem ntau yog tsim los ntawm polypropylene (PP) fibers uas ua los ntawm kev siv cov txheej txheem melt-blown manufacturing. Polypropylene yog cov thermoplastic polymer paub txog nws cov khoom pom zoo, nrog rau kev ua haujlwm siab hauv kev ntes cov khoom ntawm ntau qhov ntau thiab tsawg.
Nyob rau hauv cov txheej txheem yaj-blown, polypropylene resin yog yaj thiab extruded los ntawm me me nozzles ntawm siab tshaj tawm, tsim ultrafine fibers. Cov fibers no tau txias sai heev thiab sau los ua ib lub vev xaib ntawm cov khoom siv sib txawv uas muaj qhov chaw siab thiab qhov porosity.
Lub resulting melt-blown lim xov xwm muaj ob peb yam tseem ceeb uas ua rau nws zoo-haum rau pom daim ntaub ntawv:
Cov qauv zoo fiber ntau: Melt-blown lim muaj cov fibers ultrafine nrog cov diameters feem ntau ntawm ob peb micrometers mus rau kaum micrometers. Cov qauv zoo fiber ntau no muab thaj chaw loj rau kev ntes cov khoom thiab impurities.
High porosity: Melt-blown cov ntxaij lim dej muaj cov qauv ntxeem tau nrog ntau qhov sib cuam tshuam qhov tsis muaj qhov sib txawv ntawm cov fibers. Qhov porosity siab no tso cai rau kom muaj txiaj ntsig zoo ntawm cov kua dej thaum cuab thiab khaws cov khoom.
Cov ntxaij lim dej zuj zus: melt-tshuab lim dej tuaj yeem ua rau muaj kev sib zog ua kom muaj qhov loj dua thiab ua kom muaj zog me dua thiab ua kom muaj zog me dua thiab ua kom muaj zog me dua rau hauv cov lim xov xwm mus ntes cov khoom noj kom zoo. Qhov gradient ntom ntom no txhim kho kev pom kev ua haujlwm thiab av-tuav lub peev xwm.
Kev ntes cov khoom siv tau zoo: Cov ntxaij lim dej Melt-blown muaj peev xwm ntes tau ntau yam khoom, nrog rau cov plua plav, paj ntoos, kab mob, kab mob, thiab lwm yam kab mob hauv huab cua. Lawv feem ntau siv hauv cov tshuab lim cua, lim dej, lub ntsej muag lub ntsej muag, lub tshuab ua pa, thiab lwm yam kev siv lim.
Thermal stability: Polypropylene inherently resistant rau tshav kub thiab tshuaj degradation, ua melt-blown lim haum rau siv nyob rau hauv cov ntaub ntawv uas raug rau kub los yog hnyav tshuaj tej zaum yuav tshwm sim.
