Cov Khoom Siv Filament Spunbond Nonwoven

I. Cov txheej txheem ntws ntawm Filament spunbond Nonwoven Fabric

Kev tsim cov ntaub filament spunbond nonwoven yog ib qho txheej txheem meej uas koom ua ke cov khoom siv polymer ua thiab cov thev naus laus zis kub dov. Changshu Yongdeli Spunlaced Nonwoven Fabric Co., Ltd. ua raws li cov txheej txheem tsim khoom raws li tus qauv, saib xyuas txhua theem ntawm cov khoom siv raw mus rau cov khoom tiav kom ntseeg tau tias muaj kev ruaj khov ntawm txhua pawg. Cov txheej txheem tshwj xeeb yog raws li nram no:

Kev xaiv cov khoom siv raw thiab tsim cov mis: Lub tuam txhab xaiv cov khoom siv polymer zoo ua cov khoom siv raw, suav nrog polypropylene (PP) thiab polyethylene terephthalate (PET), thiab lwm yam. Pab pawg kws tshaj lij tsim cov qauv khoom siv raw raws li qhov yuav tsum tau ua ntawm cov khoom (xws li lub zog, mos, tiv taus cua sov, thiab lwm yam), piv txwv li, los ntawm kev kho qhov sib piv ntawm cov polymers sib txawv lossis ntxiv cov neeg sawv cev ua haujlwm (xws li cov neeg sawv cev tiv thaiv static, cov neeg sawv cev antibacterial), kom muab cov khoom tshwj xeeb, tso lub hauv paus rau kev tsim khoom tom ntej.

Kev sib hloov yaj: Cov khoom siv raw ua ntej xa mus rau lub tshuab extruder ntsia hlau, qhov chaw uas lawv yaj ntawm qhov kub teem tseg (PP cov khoom siv raw feem ntau yog 200-230 ℃, PET cov khoom siv raw feem ntau yog 260-290 ℃). Tom qab ntawd, cov khoom siv yaj dhau los ntawm lub spinneret hauv lub spinning Cheebtsam thiab raug extruded ntawm kev kub ceev los ua filament. Tus lej thiab qhov loj ntawm cov qhov hauv lub spinneret tau tsim tshwj xeeb raws li qhov hnyav thiab qhov zoo ntawm cov khoom kom ntseeg tau tias cov fiber sib npaug thiab ua raws li cov qauv zog.

Kev ncab cua thiab kev tsim lub vas: Cov fibers extruded raug ncab nyob rau hauv qhov kev ua ntawm kev ua haujlwm ntawm kev ceev ceev cua. Qhov ceev ntawm cua tuaj yeem hloov kho raws li qhov xav tau ntawm qhov zoo ntawm cov fiber kom ncab cov fibers thiab txhim kho lawv cov khoom siv kho tshuab. Cov fibers ncab raug coj los ntawm cua thiab nthuav dav sib npaug ntawm lub log tsim lub vas kom tsim cov fibers txuas ntxiv, fluffy, thiab tuab sib npaug. Thaum lub sijhawm tsim lub vas, lub tuam txhab tswj hwm qhov ceev ntawm lub log tsim lub vas thiab qhov loj ntawm cua kom ntseeg tau tias qhov hnyav sib npaug thiab kev ruaj khov ntawm lub vas fiber, npaj rau kev txhawb nqa tom qab.

Kev txhawb nqa kub dov (txheej txheem tseem ceeb): Qhov no yog kauj ruam tseem ceeb uas sib txawv ntawm cov ntaub filament kub dov tsis yog woven los ntawm lwm cov txheej txheem ntaub tsis yog woven. Cov fiber web tsim tau xa mus rau lub tshuab kub dov, uas muaj ob lub tshuab cua sov. Qhov chaw ntawm lub roller tuaj yeem tsim ua qhov chaw du lossis nrog cov qauv tshwj xeeb. Nyob rau hauv qhov kub teem (feem ntau 120-180 ℃, qhov kub tshwj xeeb raug kho raws li hom khoom siv raw), siab (feem ntau 5-20 MPa), thiab qhov ceev, cov fibers hauv lub fiber web yaj ntawm cov ntsiab lus sib cuag vim yog cua sov nias, txias kom tsim cov qauv ruaj khov. Cov neeg ua haujlwm txawj ntse yuav tswj hwm cov kev ntsuas kub dov raws li lub zog thiab tes xav tau ntawm cov khoom, piv txwv li, siv lub tshuab qauv los ua kom cov pa thiab peb-dimensionality ntawm cov khoom, thiab siv lub tshuab du los txhim kho qhov tiaj tus ntawm cov ntaub.

Kev txias thiab kev ua kom zoo nkauj: Cov ntaub spunbond nonwoven muaj qhov kub siab thiab yuav tsum nkag mus rau hauv lub tshuab txias tam sim ntawd. Los ntawm kev txias cua txias lossis kev sib cuag txias los ntawm cov menyuam txias, qhov kub ntawm cov ntaub tsis yog woven raug txo qis sai sai rau qhov kub hauv chav kom ntseeg tau tias cov qauv ruaj khov thiab zam cov teeb meem xws li shrinkage thiab deformation thaum lub sijhawm ua tiav lossis siv tom qab. Thaum lub sijhawm txias, qhov kub thiab qhov tiaj tiaj ntawm cov ntaub tsis yog woven raug saib xyuas lub sijhawm tiag tiag kom ntseeg tau tias qhov txias ua tau raws li cov qauv.

Kev Ua Tom Qab Kho: Raws li cov kev xav tau ntawm cov neeg siv khoom, lub tuam txhab yuav ua cov txheej txheem tom qab kho rau ntawm cov ntaub tsis yog woven uas txias. Cov txheej txheem tom qab kho feem ntau suav nrog: kev kho kom mos (los ntawm kev txau cov tshuaj mos lossis los ntawm kev ua kom mos, txhim kho qhov zoo ntawm cov khoom), kev kho tiv thaiv hluav taws xob (siv cov tshuaj tiv thaiv hluav taws xob lossis ua kev kho plasma kom txo cov hluav taws xob static ntawm cov ntaub), kev kho kab mob antibacterial (ntxiv cov tshuaj tua kab mob kom tiv thaiv kev loj hlob ntawm cov kab mob), kev kho hydrophilic (txhim kho cov khoom nqus dej noo, haum rau cov khoom siv tu cev) thiab lwm yam. Kev ntxiv cov txheej txheem tom qab kho ntxiv nthuav dav cov xwm txheej ntawm cov khoom siv.

Kev Txiav thiab Kev Tshuaj Xyuas: Thaum kawg, cov ntaub tsis-woven uas tau kho tom qab raug xa mus rau cov khoom siv txiav, txiav ua cov yob lossis cov ntawv raws li qhov dav thiab ntev uas cov neeg siv khoom xav tau. Tom qab txiav, cov neeg tshuaj xyuas zoo yuav ua qhov kev tshuaj xyuas tag nrho ntawm cov khoom, suav nrog qhov tsos (tshuaj xyuas seb puas muaj qhov tsis zoo, qhov sib txawv ntawm xim, cov qauv tsis sib xws), cov khoom siv lub cev (kev sim lub zog tensile, elongation thaum tawg, breathability), thiab kev ua haujlwm (xws li tus nqi antibacterial, kev ua haujlwm tiv thaiv static), xyuas kom meej tias txhua pawg khoom ua tau raws li cov qauv hauv tebchaws thiab cov neeg siv khoom xav tau, thiab tsuas yog cov khoom tsim nyog tuaj yeem khaws cia thiab xa mus rau kev xa khoom.

II. Cov txiaj ntsig ntawm Filament Spunbond Non-Woven Fabric

Muaj zog thiab ruaj khov zoo heev: Cov ntaub ntev spunbond tsis-woven siv cov qauv fiber ntev txuas ntxiv thiab tau txhawb nqa los ntawm kev nias kub kom ntseeg tau tias muaj kev sib txuas zoo ntawm cov fibers. Lub zog tensile ntawm cov khoom yog qhov zoo heev, muaj peev xwm tiv taus cov zog sab nraud loj yam tsis muaj kev rhuav tshem. Tib lub sijhawm, nws txoj kev tiv thaiv kev hnav thiab kev laus zoo heev, tswj kev ua haujlwm ruaj khov txawm tias siv ntev lossis nyob rau hauv ib puag ncig hnyav (xws li dej noo, kev sib txhuam me me), nrog rau lub neej ua haujlwm ntev dua li cov ntaub luv luv tsis-woven.

Kev ua pa tau zoo heev thiab cov dej noo permeability: Thaum lub sijhawm ua cov txheej txheem spunbond reinforcement, los ntawm kev ua kom zoo dua qhov kev tsim ntawm cov menyuam cua sov cov qauv thiab cov kev ntsuas siab, cov qauv microporous sib xws tuaj yeem tsim rau ntawm qhov chaw ntawm cov ntaub. Cov micropores no tsis yog tsuas yog ua kom muaj huab cua zoo, muab cov khoom ua pa tau zoo, tab sis kuj tso cai rau cov pa dej nkag mus, zam kev xav tsis zoo, tsim nyog rau cov khoom siv tu cev, cov ntaub hauv qab, thiab lwm yam xwm txheej uas kov lub cev tib neeg.

Kev ruaj khov ntawm qhov ntev: Vim yog cov txheej txheem ua kom zoo li spunbond, cov ntaub filament spunbond non-woven tau dhau los ntawm kev kho cua sov txaus thaum lub sijhawm tsim khoom. Hauv kev ua tiav tom qab (xws li txiav, xaws) lossis siv, txawm tias tom qab hloov pauv kub lossis ntxuav me ntsis, nws yuav tsis pom tseeb tias yuav ntsws lossis hloov pauv, ua kom ntseeg tau tias qhov ntev ntawm cov khoom sib xws, muab kev yooj yim rau cov neeg siv khoom tsim khoom.

Kev ua haujlwm zoo thiab tus nqi zoo dua: Cov txheej txheem tsim khoom ntawm filament spunbond non-woven fabric yog txuas ntxiv mus, los ntawm kev sib hloov yaj mus rau kev nias kub, ua rau kev ua haujlwm txuas ntxiv mus. Changshu Yongdeli spunlaced Non-Woven Fabric Co., Ltd. tau txhim kho kev ua haujlwm ntau ntxiv los ntawm kev ua kom zoo dua cov kev teeb tsa ntau lawm thiab cov khoom siv. Piv rau qee cov txheej txheem nyuaj tsis-woven fabrics, cov txheej txheem filament spunbond muaj kev siv cov khoom siv raw thiab kev siv hluav taws xob tsim nyog, ua kom ntseeg tau tias cov khoom zoo thaum muab cov txiaj ntsig zoo dua, ua rau cov neeg siv khoom tau txais cov khoom zoo, pheej yig.

Cov ntaub ntawv hloov kho tau dav thiab muaj peev xwm hloov kho tau: Lub tuam txhab tuaj yeem hloov kho cov khoom raws li cov neeg siv khoom xav tau los ntawm kev siv ntau hom khoom siv siab (xws li PP, PET) lossis ntxiv cov neeg sawv cev ua haujlwm. Txawm hais tias kho qhov muaj zog, mos ntawm cov khoom, lossis ntxiv cov haujlwm tshwj xeeb xws li antibacterial, anti-static, txhua yam tuaj yeem ua tiav los ntawm kev ua kom zoo dua qub. Lub peev xwm hloov kho tau muaj zog, muaj peev xwm ua tau raws li ntau yam kev xav tau ntawm ntau yam lag luam.

III. Cov yam ntxwv ntawm Filament Spunbond Non-Woven Fabric

Cov ntaub tiaj tiaj thiab sib xws, zoo nkauj: Los ntawm kev tswj hwm qhov tseeb ntawm ntau yam kev ntsuas hauv kev sib hloov, kev sib txuas thiab kev nias kub, qhov hnyav sib xws ntawm cov ntaub ntawm cov ntaub filament spunbond tsis-woven yog siab, tsis muaj qhov sib txawv ntawm qhov tuab lossis cov fiber sib sau ua ke. Yog tias siv lub tshuab nias kub du, cov ntaub ntawm qhov chaw tuaj yeem nthuav tawm qhov zoo nkauj, tiaj tus; yog tias siv lub tshuab dov qauv, nws tuaj yeem tsim cov qauv zoo nkauj, txhim kho cov qauv pom ntawm cov khoom, haum rau cov xwm txheej uas muaj qhov xav tau siab rau qhov tsos. Tsis muaj cov tshuaj nplaum, tus phooj ywg ib puag ncig thiab muaj kev nyab xeeb: Cov ntaub ntev filament kub-nias tsis-woven yog sib txuas los ntawm kev yaj thiab sib xyaw ntawm cov fibers los ntawm kev nias kub. Thaum lub sijhawm tsim khoom, tsis tas yuav ntxiv cov kua nplaum, resin, lossis lwm yam tshuaj nplaum, zam kev puas tsuaj ntawm cov tshuaj lom neeg rau tib neeg kev noj qab haus huv thiab txo cov pa phem ib puag ncig. Cov khoom tau raug sim los ntawm cov koom haum muaj cai thiab tsis muaj ntxhiab lossis cov khoom phom sij, ua tau raws li cov qauv tiv thaiv ib puag ncig hauv tebchaws (xws li GB 18401-2010 "National Basic Safety Technical Specifications for Textiles"), thiab tuaj yeem siv tau zoo hauv kev tu cev thiab kev kho mob.

Kev ua haujlwm zoo heev: Cov khoom muaj cov khoom ua haujlwm zoo heev xws li kev txiav, xaws, kev sib txuas cua sov, thiab luam ntawv. Thaum txiav, tsis muaj qhov tshwm sim ntawm cov npoo xoob lossis cov fiber poob; thaum lub sijhawm sib txuas cua sov, nws tuaj yeem sib txuas nrog lwm cov ntaub ntawv (xws li zaj duab xis, lwm cov ntaub tsis-woven), thiab lub zog sib txuas siab; tib lub sijhawm, qhov chaw ntawm cov ntaub yog du thiab tiaj tus, pab txhawb kev ua haujlwm luam ntawv, thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm cov neeg siv khoom rau cov duab thiab cov qauv tsim khoom.

Muaj zog tiv taus tshuaj lom neeg xeb: Cov khoom siv tseem ceeb ntawm cov ntaub filament spunbond non-woven (xws li PP, PET) muaj kev ruaj khov tshuaj lom neeg zoo thiab muaj zog tiv taus cov tshuaj lom neeg xws li kua qaub, alkalis, thiab ntsev. Hauv cov xwm txheej uas nws kov cov tshuaj lom neeg me me (xws li kev so hauv kev lag luam thiab ntim khoom), kev ua haujlwm ntawm cov khoom tsis cuam tshuam thiab tuaj yeem tswj tau qhov xwm txheej siv ruaj khov.

Plaub. Qhov hnyav ntawm Filament Spunbond Non-Woven Fabric

Cov ntaub filament spunbond non-woven uas tsim los ntawm Changshu Yongdeli Spunlaced Non-Woven Fabric Co., Ltd. muaj ntau yam qhov hnyav, ua tau raws li qhov xav tau ntawm ntau yam lag luam thiab cov xwm txheej siv. Qhov hnyav tshwj xeeb yog 10g / ㎡ - 150g / ㎡, thiab tuaj yeem hloov kho thiab kho raws li qhov xav tau tshwj xeeb ntawm cov neeg siv khoom. Cov yam ntxwv thiab cov xwm txheej siv ntawm txhua qhov hnyav ntawm cov khoom yog raws li nram no:

Cov khoom hnyav tsawg (10g/㎡ - 30g/㎡): Cov khoom no sib dua thiab ua pa tau zoo heev, nrog rau qhov chaw mos thiab pob tshab (cov khoom siv PP). Nws feem ntau yog siv rau qhov chaw lossis txheej ntws ntawm cov khoom siv tu cev (xws li qhov chaw ntawm cov ntaub so ntswg huv, txheej ntws ntawm cov ntaub so ntswg), cov ntaub sab hauv ntawm cov khaub ncaws (xws li sab hauv ntawm cov khaub ncaws sib dua, txheej sab hauv ntawm lub ntsej muag), thiab cov ntaub ntawv ntim khoom (xws li sab hauv ntawm cov khoom siv hluav taws xob uas tiv thaiv plua plav) thiab lwm yam xwm txheej uas tsis tas yuav tsum muaj cov khoom tuab thiab qhov hnyav.

Cov khoom hnyav nruab nrab (31g/㎡ - 80g/㎡): Cov khoom muaj ob qho tib si sib dua thiab muaj zog, nrog rau kev ua tau zoo sib npaug, ua pa tau zoo heev thiab ruaj khov. Nws yog siv dav hauv cov khoom siv tu cev (xws li cov ntaub so ntub rau menyuam yaus, txheej sab nraud ntawm cov khoom siv rau cov neeg laus), cov khoom tiv thaiv kev kho mob (xws li lub kaus mom kho mob, khau kho mob, txheej sab nraud ntawm cov ntaub pua chaw pw pov tseg), cov khoom siv hauv tsev (xws li cov ntaub pua chaw pw pov tseg, hnab khw, hnab khaws khoom), thiab cov teb ua liaj ua teb (xws li daim ntaub npog cov noob, cov ntaub tiv thaiv nyom) thiab lwm yam xwm txheej uas muaj qhov xav tau siab rau lub zog thiab tuab ntawm cov khoom.

Cov khoom hnyav (81g/㎡ - 150g/㎡): Cov khoom muaj tuab loj, muaj zog siab, thiab zoo nruj. Nws muaj kev tiv thaiv kev hnav thiab kev cuam tshuam zoo heev. Nws yog qhov tsim nyog rau cov teb kev lag luam (xws li daim ntaub so kev lag luam, cov ntaub ntawv hauv paus rau cov ntaub ntawv lim dej, cov ntaub qhwv cable), cov ntaub ntawv ntim khoom (xws li daim ntaub ntim khoom hnyav, hnab ntim khoom plig), kho kom zoo nkauj hauv tsev (xws li cov ntaub thaiv pov tseg tuab, cov ntaub pua plag), thiab cov teb ua liaj ua teb (xws li daim ntaub npog cov noob, cov ntaub tiv thaiv nyom) thiab lwm yam xwm txheej uas muaj qhov xav tau siab rau cov khoom muaj zog thiab tuab.

Ⅴ. Daim Ntawv Thov Scope ntawm Filament Spunbond Non-Woven Fabric

Kev lag luam khoom siv tu cev: Raws li daim teb thov tseem ceeb ntawm filament Spunbond non-woven fabric, cov khoom no, nrog nws lub teeb, ua pa tau, thiab kev phooj ywg ib puag ncig, yog siv dav hauv cov khoom siv tu cev (xws li cov ntaub so ntswg ntws, txheej saum npoo, sab tiv thaiv kev xau ntawm cov ntaub so ntswg huv), cov khoom siv tu cev rau poj niam (txheej saum npoo ntawm cov ntaub so ntswg huv, ntaub qhwv, txheej saum npoo ntawm cov ntaub so ntub dej), thiab cov khoom siv rau cov neeg laus tsis tuav (txheej sab nraud ntawm cov ntaub so ntswg pov tseg rau cov neeg laus, txheej saum npoo ntawm cov ntaub so ntswg saib xyuas). Piv txwv li, hauv cov ntaub so ntswg huv, cov ntaub filament spunbond non-woven uas tsis hnyav tuaj yeem siv ua txheej ntws kom sai sai coj cov zis tawm thiab ua kom qhov chaw qhuav; cov khoom hnyav nruab nrab tuaj yeem siv ua txheej sab nraud, nrog kev ua pa tau zoo heev thiab kev ua haujlwm tiv thaiv kev xau, txhim kho kev nplij siab ntawm kev siv. Kev lag luam tiv thaiv kev kho mob: Hauv kev kho mob, filament spunbond non-woven fabric, vim nws tus cwj pwm zoo rau ib puag ncig, tsis muaj ntxhiab, tiv taus tshuaj lom neeg, thiab yooj yim ntawm kev ua tiav, tau dhau los ua cov khoom siv raw tseem ceeb rau cov khoom siv tiv thaiv kev kho mob. Nws siv tau los ua lub kaus mom kho mob, cov khau npog kho mob, cov ntaub ntawv kho mob pov tseg, cov ntaub npog hauv ncoo, cov khaub ncaws phais mob sab hauv uas tsis huv, cov txheej sab nraud ntawm lub ntsej muag (kom tiv thaiv kev sib kis ntawm cov tee dej), thiab lwm yam. Piv txwv li, cov kaus mom kho mob siv cov ntaub spunbond tsis-woven uas muaj qhov hnyav nruab nrab, uas tsis tsuas yog ua kom muaj pa tau xwb tab sis kuj tiv thaiv kev poob plaub hau thiab tiv thaiv kev ua qias tuaj ntawm ib puag ncig kho mob; cov khau npog kho mob vam khom lawv qhov kev tiv thaiv zoo, tiv thaiv cov neeg ua haujlwm kho mob ko taw los ntawm kev ua qias tuaj.

Kev lag luam hauv tsev thiab cov khoom siv niaj hnub: Nrog rau kev loj hlob ntawm cov neeg siv khoom xav tau cov khoom siv hauv tsev yooj yim thiab huv si, kev siv cov ntaub filament spunbond tsis-woven hauv kev lag luam no txuas ntxiv nthuav dav. Nws tuaj yeem siv los ua cov khoom siv hauv tsev pov tseg (xws li cov ntaub pua rooj pov tseg, cov ntaub thaiv qhov rai, cov ntaub npog rooj zaum), ntim rau cov khoom siv niaj hnub (xws li cov ntaub so ntub, cov ntaub sab hauv ntawm lub thawv ntaub so ntswg, hnab khw), cov khoom khaws cia (xws li cov hnab khaws cia, cov hnab tiv thaiv plua plav khaub ncaws), thiab lwm yam. Piv txwv li, cov ntaub pua rooj pov tseg siv cov khoom hnyav nruab nrab, uas yog lub teeb thiab tsis muaj dej (qee qhov kho nrog kev tiv thaiv dej), thiab tuaj yeem pov tseg tom qab siv, yooj yim thiab ceev; cov hnab khw, nrog lawv lub zog siab thiab kev luam tawm, dhau los ua qhov kev xaiv zoo tshaj plaws rau cov hnab khw uas tsis muaj kuab paug.

Kev lag luam thiab ntim khoom: Hauv kev tsim khoom lag luam, lub zog siab thiab kev tiv thaiv hnav ntawm cov ntaub filament spunbond tsis-woven yog siv tag nrho, tsim nyog rau cov ntaub so hauv kev lag luam (xws li cov roj pleev xim hauv kev ua khoom siv thiab kev lag luam hluav taws xob), cov khoom siv lim dej (xws li cov txheej txheem txhawb nqa rau cov lim cua thiab cov lim dej), cov ntaub qhwv cable (los tiv thaiv cov cables los ntawm kev hnav sab nraud thiab xeb), thiab lwm yam. Hauv kev ntim khoom, cov khoom hnyav tuaj yeem siv rau kev ntim khoom hnyav (xws li rooj tog thiab cov khoom siv hauv tsev rau kev ntim khoom thauj) thiab ntim khoom plig (xws li cov hnab ntaub khoom plig zoo), tiv thaiv cov khoom ntim khoom thaum txhim kho qhov zoo nkauj ntawm cov ntim khoom.

Kev ua liaj ua teb thiab kev cog qoob loo: Kev siv cov ntaub filament spunbond non-woven hauv kev ua liaj ua teb kuj maj mam nthuav dav, ua haujlwm ua daim ntaub npog cov noob (rau kev rwb thaiv tsev thiab khaws cov dej noo, txhawb kev cog noob), cov ntaub tiv thaiv cov nroj tsuag (tom qab kev kho tshwj xeeb, nws tuaj yeem tiv thaiv cov nroj tsuag loj hlob thaum tso cai rau dej nkag mus), thiab daim ntaub qhwv cov nroj tsuag (los tiv thaiv cov noob thaum thauj mus los ntawm kev puas tsuaj). Piv txwv li, daim ntaub npog cov noob siv cov khoom hnyav nruab nrab-qis, nrog rau kev nkag tau zoo ntawm huab cua, muab ib puag ncig kev loj hlob zoo rau cov noob hluas, thiab tiv taus kev laus, tso cai rau kev siv rov qab ntau zaus ntawm ntau lub voj voog kev loj hlob.

Changshu Yongdeli Spunlaced Non-Woven Fabric Co., Ltd. ib txwm ua raws li cov neeg siv khoom xav tau, vam khom kev ua tau zoo tshaj plaws thiab ruaj khov ntawm filament spunbond non-woven fabric, muab cov kev daws teeb meem rau ntau yam lag luam. Yav tom ntej, lub tuam txhab yuav txuas ntxiv nqis peev rau kev tshawb fawb thiab kev txhim kho, ua kom zoo dua cov txheej txheem tsim khoom, nplua nuj cov haujlwm khoom thiab cov xwm txheej siv, muab kev ua lag luam nrog cov khoom lag luam zoo dua, pheej yig filament spunbond non-woven fabric, thiab ua tiav kev txhim kho yeej-yeej nrog cov neeg siv khoom.