Non-woven fabrics muaj xws li polyester, polypropylene, nylon, spandex, acrylic, thiab lwm yam raws li lawv muaj pes tsawg leeg; Cov khoom xyaw sib txawv yuav muaj cov qauv sib txawv ntawm cov ntaub tsis-woven. Muaj ntau ntau cov txheej txheem rau kev tsim cov ntaub tsis-woven, thiab yaj tshuab tsis-woven yog txheej txheem ntawm yaj tshuab. Nws yog ib qho ntawm cov txheej txheem uas tsis yog-woven npuag ntau lawm thiab kuj yog ib txoj hauv kev ncaj qha polymer mesh txoj kev. Nws yog txheej txheem ntawm extruding polymer yaj los ntawm cov ntsia hlau extruders los ntawm high-speed thiab high-temperature airflow tshuab los yog lwm yam txhais tau tias yuav ua rau hnyav ncab ntawm cov yaj ntws thiab tsim cov fibers zoo heev, uas tom qab ntawd sib sau ua ke ntawm lub mesh tsim nruas los yog mesh kab hlau rhuav los tsim fiber ntau mesh, Thaum kawg, cov yaj tshuab fiber ntau nonwoven npuag yog ntxiv dag zog los ntawm kev sib txuas ntawm tus kheej.
Melt cua tshuab yog tsim los ntawm polypropylene ua cov khoom tseem ceeb, thiab cov kab fiber ntau tuaj yeem ncav cuag 1-5 microns. Cov fibers ultra-nplua nuj nrog cov qauv capillary tshwj xeeb, xws li ntau qhov khoob, cov qauv fluffy, thiab zoo wrinkle tsis kam, nce tus naj npawb thiab qhov chaw ntawm fibers hauv ib cheeb tsam, yog li ua rau cov ntaub nplaum yaj muaj qhov pom zoo, tiv thaiv, rwb thaiv tsev, thiab roj nqus cov khoom. Nws tuaj yeem siv rau hauv thaj chaw xws li cov ntaub ntawv huab cua thiab kua lim dej, cov ntaub ntawv cais tawm, cov ntaub ntawv nqus, cov ntaub ntawv npog, cov ntaub ntawv rwb thaiv tsev, cov ntaub ntawv roj absorbing, thiab cov ntaub so ntswg.
Lub fiber txoj kab uas hla ntawm lub yaj cua tshuab yog zoo heev, nyob ib ncig ntawm 2 microns (um), yog li nws tsuas yog ib feem kaum ntawm txoj kab uas hla ntawm spunbond txheej. Qhov finer lub yaj cua tshuab txheej, qhov ntau nws tuaj yeem thaiv qhov nkag ntawm cov khoom me me. Piv txwv li, lub npog ntsej muag KN95 yog hais txog tus nqi ntws ntawm 85L uas tuaj yeem thaiv 95% ntawm cov khoom me me (0.3um) nyob rau hauv ib txwm muaj. Qhov no ua lub luag haujlwm tseem ceeb hauv kev lim cov kab mob thiab tiv thaiv cov ntshav infiltration, uas yog vim li cas nws thiaj li hu ua lub plawv ntawm lub npog ntsej muag.
Nthuav cov txheej txheem ntws
Polymer pub → Melting extrusion → Fiber tsim → Fiber txias → Mesh tsim → Bonding (taw mesh) → Ntug txiav thiab winding → Post tiav los yog tshwj xeeb xov
Polymer pub - PP polymer raw cov ntaub ntawv feem ntau yog ua rau me me spherical los yog granular slices, ncuav rau hauv thoob los yog hoppers, thiab pub rau hauv cov ntsia hlau extruders.
Melt extrusion - Thaum kawg ntawm cov ntsia hlau extruder, cov khoom siv polymer yog tov nrog cov ntaub ntawv tsim nyog xws li stabilizers, whitening agents, thiab xim masterbatch. Tom qab sib tov sib xyaw thiab sib tov, lawv nkag mus rau hauv cov ntsia hlau extruder thiab yog rhuab ntawm qhov kub thiab txias los ua ib qho yaj. Thaum kawg, cov yaj yog pub rau hauv spinneret los ntawm lub lim los ntawm lub twj tso kua mis metering. Hauv cov txheej txheem yaj yaj, extruders feem ntau txo qhov hnyav molecular ntawm polymers los ntawm lawv cov shear thiab thermal degradation los.
Fiber tsim - Lub lim huv si yuav tsum mus los ntawm kev faib khoom thiab tom qab ntawd muab sib npaug rau hauv txhua pawg ntawm spinnerets, kom cov nyiaj extrusion ntawm txhua qhov spinneret zoo ib yam. Lub spinneret phaj rau yaj cua tshuab yog txawv los ntawm lwm txoj kev spinning nyob rau hauv hais tias lub spinneret qhov yuav tsum tau teem nyob rau hauv ib txoj kab ncaj nraim, nrog high-speed airflow spout qhov ntawm ob sab.
Fiber cooling - Ib tug loj npaum li cas ntawm chav tsev kub cua yog ib txhij nqus nyob rau hauv ob sab ntawm spinneret, tov nrog cov cua kub ntws uas muaj ultrafine fibers kom txias lawv, thiab cov melted ultrafine fibers yog txias thiab solidified.
Kev tsim lub vev xaib - Hauv kev tsim cov yaj tshuab fiber ntau nonwoven fabrics, spinneret tuaj yeem muab tso rau kab rov tav lossis ntsug. Yog hais tias muab tso rau kab rov tav, ces ultrafine fibers yog txau mus rau ib ncig lub nruas los tsim ib lub mesh; Yog hais tias muab tso rau vertically, cov fibers yuav poob mus rau ib tug kab rov tav txav mesh kab hlau rhuav thiab condense rau hauv ib lub mesh.
Adhesive (taw mesh) - Lub nplaum nplaum rau tus kheej tau hais los saum no yog qhov txaus rau qee lub hom phiaj ntawm cov khoom siv yaj, xws li xav tau cov fiber ntau mesh kom muaj cov qauv fluffy, zoo huab cua tuav lossis porosity, thiab lwm yam. Rau ntau lub hom phiaj, nws tus kheej nplaum reinforcement ib leeg tsis txaus, thiab kub dov bonding, ultrasonic bonding, los yog lwm yam kev txhawb zog.
Post lub sij hawm: Dec-15-2023