Melt blown method yog ib txoj hauv kev npaj cov fibers los ntawm kev nrawm nrawm ntawm polymer yaj los ntawm qhov kub thiab txias thiab siab ceev cua tshuab. Polymer slices yog rhuab thiab pressurized rau hauv lub xeev molten los ntawm ib tug ntsia hlau extruder, thiab ces dhau los ntawm lub yaj tis channel mus txog rau lub nozzle qhov nyob rau hauv pem hauv ntej kawg ntawm lub nozzle. Tom qab extrusion, lawv ntxiv refined los ntawm stretching ob converging high-speed thiab high-temperature airflows. Cov fibers refined yog txias thiab solidified nyob rau hauv lub mesh curtain ntaus ntawv los ua ib tug yaj uas tsis yog-woven ntaub.
Lub nruam yaj tshuab tsis-woven npuag ntau lawm tshuab tau undergone ntau tshaj 20 xyoo ntawm txoj kev loj hlob nyob rau hauv Tuam Tshoj. Nws daim ntawv thov teb tau nthuav dav los ntawm cov roj teeb cais, cov khoom lim dej, cov khoom siv roj absorbing, thiab cov ntaub ntawv rwb thaiv tsev rau kev kho mob, kev tu cev, kev kho mob, kev tiv thaiv, thiab lwm yam. Nws cov thev naus laus zis ntau lawm kuj tau tsim los ntawm tib lub tshuab ziab khaub ncaws rau kev coj ua sib xyaw. Ntawm lawv, yaj cov khoom sib xyaw uas tau ua tiav kev kho electrostatic polarization tuaj yeem siv dav rau kev ua kom huv hauv hluav taws xob, khoom noj khoom haus, dej haus, tshuaj lom neeg, tshav dav hlau, tsev so thiab lwm qhov chaw, nrog rau kev kho mob qhov ncauj qhov ntswg, kev lag luam thiab pej xeem cov plua plav collector lim hnab, vim lawv tsis tshua muaj zog, plua plav loj tuav, thiab pom kev ua haujlwm siab.
Lub yaj tshuab tsis-woven npuag ua los ntawm cov khoom siv polypropylene (ib hom ultra-fine electrostatic fiber ntau daim ntaub uas tuaj yeem ntes plua plav) cuam tshuam los ntawm cov khoom xws li fiber ntau pore loj thiab tuab, uas cuam tshuam rau cov nyhuv pom. Cov kab sib txawv ntawm cov kab sib txawv yog lim los ntawm cov qauv sib txawv, xws li cov ntim ntim, qhov cuam tshuam, cov qauv kev sib txawv ua rau fiber ntau blockage, thiab qee cov khoom raug lim los ntawm electrostatic fibers los ntawm electrostatic attraction hauv paus ntsiab lus. Kev kuaj pom kev ua tau zoo yog ua raws li qhov loj me uas tau teev tseg los ntawm tus qauv, thiab cov qauv sib txawv yuav siv cov khoom sib txawv ntawm qhov sib txawv rau kev sim. BFE feem ntau siv cov kab mob aerosol nrog qhov nruab nrab particle txoj kab uas hla ntawm 3 μ m, thaum PFE feem ntau siv cov khoom nrog sodium chloride txoj kab uas hla ntawm 0.075 μ m. Tsuas yog los ntawm kev pom ntawm kev pom kev ua haujlwm zoo, PFE muaj txiaj ntsig zoo dua li BFE.
Hauv kev ntsuas tus qauv ntawm KN95 qib qhov ncauj qhov ntswg, cov khoom siv aerodynamic txoj kab uas hla ntawm 0.3 μ m yog siv los ua cov khoom kuaj, vim hais tias cov khoom loj dua lossis me dua li cov kab no tau yooj yim cuam tshuam los ntawm cov lim fibers, thaum cov khoom uas muaj qhov nruab nrab ntawm 0.3 μ m yog qhov nyuaj rau lim. Txawm hais tias cov kab mob me me, lawv tsis tuaj yeem kis tau ib leeg hauv huab cua. Lawv xav tau cov tee dej thiab cov tee dej nuclei ua cov khoom xa mus rau hauv huab cua, ua rau lawv yooj yim lim tawm.
Lub hauv paus ntawm meltblown ntaub tshuab yog ua kom pom kev zoo thaum txo qhov ua pa tsis ua pa, tshwj xeeb tshaj yog rau N95 thiab saum toj no meltblown fabrics, VFE qib meltblown fabrics, nyob rau hauv cov nqe lus ntawm formulation ntawm polar masterbatch, kev ua tau zoo ntawm cov ntaub ntawv meltblown, cov nyhuv spinning ntawm meltblown kab, thiab tshwj xeeb tshaj yog ntxiv ntawm cov polar punctures, fiber ntau yuav cuam tshuam rau cov thickness ntawm cov polar masterbatch. Kev ua kom tsis muaj zog thiab ua haujlwm siab yog qhov tseem ceeb tshaj plaws technology.
Yam cuam tshuam rau qhov zoo ntawm meltblown fabrics
MFI ntawm polymer raw khoom
Meltblown ntaub, raws li cov txheej txheem zoo tshaj plaws rau lub qhov ncauj qhov ntswg, yog cov khoom siv zoo heev uas muaj ntau qhov sib cuam tshuam ultrafine fibers stacked hauv random cov lus qhia sab hauv. Siv PP ua piv txwv, qhov siab dua ntawm MFI, qhov zoo dua cov hlau rub tawm thaum lub sij hawm yaj tshuab ua, thiab qhov zoo dua qhov kev pom zoo.
Lub kaum sab xis ntawm lub dav hlau kub
Lub kaum sab xis ntawm cov cua kub txhaj tshuaj feem ntau cuam tshuam cov nyhuv stretching thiab fiber ntau morphology. Lub kaum sab xis me me yuav txhawb kev tsim cov kab sib txuas fiber ntau hauv cov kwj deg zoo, ua rau tsis zoo ntawm cov ntaub tsis-woven. Yog tias lub kaum sab xis txav mus rau 90 °, qhov sib txawv heev thiab cov cua tsis sib haum yuav raug tsim tawm, uas yog qhov tsim nyog rau kev faib tawm ntawm cov fibers ntawm cov ntaub thaiv npog, thiab cov ntaub yaj uas ua rau lub tshuab ziab khaub ncaws yuav muaj kev ua haujlwm zoo anisotropy.
Ntsia hlau extrusion ceev
Nyob rau hauv qhov kub thiab txias, qhov extrusion tus nqi ntawm cov ntsia hlau yuav tsum tau tswj nyob rau hauv ib tug tej yam ntau yam: ua ntej ib tug tseem ceeb point, qhov ceev ntawm extrusion ceev, qhov ntau dua qhov ntau thiab lub zog ntawm cov ntaub meltblown; Thaum tus nqi tseem ceeb tshaj, lub zog ntawm meltblown ntaub tiag tiag txo, tshwj xeeb tshaj yog thaum MFI> 1000, uas tej zaum yuav yog vim tsis txaus stretching ntawm cov filament los ntawm siab extrusion tus nqi, uas ua rau mob hnyav spinning thiab txo cov bonding fibers ntawm cov ntaub nto, ua rau kom txo tau lub zog ntawm meltblown ntaub.
Cua kub tshaj tawm thiab kub
Nyob rau tib lub sijhawm ntawm qhov kub thiab txias, ntsia hlau nrawm, thiab qhov tau txais kev ncua deb (DCD), qhov ceev ntawm huab cua kub, qhov me me ntawm fiber ntau txoj kab uas hla, thiab lub softer tes xav ntawm cov ntaub tsis-woven, ua rau muaj fiber ntau entanglement, uas ua rau ib tug denser, smoother, thiab muaj zog fiber web web.
Txais qhov nrug (DCD)
Qhov kev lees paub ntev ntev tuaj yeem ua rau txo qis hauv qhov ntev thiab lub zog transverse, nrog rau kev khoov lub zog. Cov ntaub ntawv uas tsis yog-woven muaj ib tug fluffy kev ntxhib los mos, uas yuav ua rau ib tug txo nyob rau hauv pom efficiency thiab kuj nyob rau hauv lub melt blown txheej txheem.
Melt tshuab mould taub hau (hard index)
Pwm cov khoom thiab txheej txheem kub qhov chaw. Siv qee qhov qis-kawg pwm hlau hloov pauv tuaj yeem ua rau cov kab nrib pleb uas tsis tuaj yeem pom ntawm lub qhov muag thaum siv, kev ua haujlwm tsis zoo, tsis zoo, thiab kev ua haujlwm ntawm lub tshuab ncaj qha yam tsis muaj kev kho polishing. Ua kom tsis sib xws, tsis muaj zog, tsis sib npaug ntawm cov tshuaj tsuag, thiab yooj yim crystallization.
Net hauv qab suction
Cov txheej txheem tsis xws li huab cua ntim thiab siab rau net hauv qab suction
Net ceev
Qhov ceev ntawm cov ntaub thaiv kab hlau rhuav yog qeeb, qhov hnyav ntawm cov ntaub meltblown yog siab, thiab pom kev ua haujlwm siab dua. Ntawm qhov tsis sib xws, nws kuj muaj tseeb.
Polarizing khoom
Cov tsis xws li polarization voltage, polarization lub sij hawm, polarization molybdenum xaim deb, thiab polarization ib puag ncig cov av noo tuaj yeem cuam tshuam rau kev pom zoo.
Dongguan Liansheng Nonwoven Technology Co., Ltd.tau tsim nyob rau hauv lub Tsib Hlis 2020. Nws yog ib tug loj-scale non-woven npuag ntau lawm enterprise integrating kev tshawb fawb thiab kev loj hlob, ntau lawm, thiab muag khoom. Nws tuaj yeem tsim ntau yam xim ntawm PP spunbond non-woven fabrics nrog qhov dav ntawm tsawg dua 3.2 meters los ntawm 9 grams mus rau 300 grams.
Post lub sij hawm: Nov-28-2024