Cov Npog Ncaujyog cov ntaub tsis-woven, uas yog cov ntaub tsis-woven piv rau cov ntaub textile, thiab yog tsim los ntawm cov fibers directional lossis random.
Feem ntau cov ntaub npog qhov ncauj kho mob yog cov qauv ntau txheej, feem ntau hu ua SMS qauv (2 S thiab 1 M txheej). Tam sim no, cov txheej ntau tshaj plaws hauv Suav teb yog 5, uas yog SMMMS (2 S txheej thiab 3 M txheej).
SMS yog dab tsi?
Ntawm no, S sawv cev rau Spunbond txheej. Lub txoj kab uas hla ntawm cov fiber yog qhov tuab, txog li 20 microns (m). Lub luag haujlwm tseem ceeb ntawm 2 S Spunbond txheej yog los txhawb tag nrho cov qauv ntaub tsis-woven, uas tsis muaj kev cuam tshuam loj rau qhov thaiv. Qhov tseem ceeb tshaj plaws ntawm lub npog ntsej muag yog txheej thaiv lossis Meltblown txheej M (Meltblown txheej). Lub txoj kab uas hla ntawm cov tshuaj tsuag molten yog qhov nyias nyias, txog li 2 microns (M), yog li nws tsuas yog ib feem kaum ntawm txoj kab uas hla ntawm spunbonding txheej, uas ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov kab mob thiab cov ntshav nkag mus.
Feem ntau, cov ntaub npog qhov ncauj kho mob siv daim ntaub yaj uas hnyav 20 grams, thiab cov ntaub npog qhov ncauj N95 khob siv daim ntaub yaj uas hnyav 40 grams lossis ntau dua.
Raws li cov ntaub ntawv ntawm Tuam Tshoj Industrial Textile Industry Association, thaum kawg ntawm xyoo 2018, muaj 1,477 txoj kab tsim khoom hauv tsev spunbonded, ntau dua 65 dua li xyoo dhau los, nrog rau kev nce xyoo-rau-xyoo ntawm 4.6%, ntawm cov uas, PP spunbonded non-wovens ntau ntxiv los ntawm 3.38%, SMS composite ntau ntxiv los ntawm ze li ntawm 13%, thiab PET spunbonded non-wovens ntau ntxiv los ntawm 9.32%. Tus naj npawb ntawm cov tuam txhab uas muaj cov zis txhua xyoo tshaj 50,000 tons kuj tau nce ntxiv los ntawm 2017. Spunbonded cov lag luam tab tom ua kom lawv txoj kev loj hlob mus rau qhov loj me, kev sib zog thiab qib siab kom tau raws li kev thov ua lag luam ntawm kev txhim kho khoom thiab kev txhim kho thev naus laus zis.
Txij li xyoo 2018, ntau lub tuam txhab lag luam hauv tsev tau tsim lawv cov khoom lag luam hauv kev coj ua kom sib dua, nyias dua thiab ua tau zoo dua, thiab tau txais txiaj ntsig zoo. SSMMS spunbonded / molten shotcreting composite txheej txheem 600m / min lossis siab dua kev ua haujlwm ceev ceev; Kwv yees li 10 grams ib square meter super mos lub teeb ruaj khov cov khoom lag luam zoo txuas ntxiv tawm.
Cov ntaub SMS tsis yog woven los qhov twg los?
Cov ntaub SMS tsis yog wovenfeem ntau yog ua los ntawm polypropylene PP (nrog cov khoom ntuj tsim bacteriostatic thiab hydrophobicity), thiab lub cheeb tsam ntawm cov fibers tuaj yeem ncav cuag 0.5-10 microns. Cov fibers ultrafine nrog cov capillarity tshwj xeeb ua rau kom muaj ntau thiab thaj chaw ntawm cov fibers ib cheeb tsam, yog li ua rau cov ntaub yaj-tshuaj tsuag muaj cov khoom lim cua zoo, ua rau lawv yog cov khoom siv npog ntsej muag zoo.
Tam sim no, muaj peb txoj kev tseem ceeb rau kev tsim cov khoom SMS (SMS non-woven fabric): "ib kauj ruam", "ob kauj ruam" thiab "ib kauj ruam thiab ib nrab".
Ib kauj ruam nta yog siv cov khoom siv raw ntawm cov txheej txheem no, siv ob lub tshuab spun-bonded, melt-blown, cov khoom siv raw spinning ncaj qha tom qab yaj rau hauv cov nets, tsuav yog kev npaj tsim nyog ntawm cov txheej txheem sib txawv ntawm kev tsim kho tshuab spinning, thiab tuaj yeem ua cov khoom nrog cov qauv sib txawv, txhua txheej ntaub laminated composite, feem ntau yog nrog lub tshuab kub dov consolidation rau hauv daim ntaub. "Ib kauj ruam txoj kev" yog tus cwj pwm los ntawm kev yaj ncaj qha spinning rau hauv lub net, lub xeev ntawm txhua lub tshuab spinning tuaj yeem hloov kho tau ywj pheej, cov txheej txheem ntau lawm ntawm kev tswj hwm muaj zog, kev noj qab haus huv zoo, kev kub ceev, tuaj yeem hloov kho qhov sib piv ntawm txhua txheej ntawm fiber net, tuaj yeem tsim cov khoom SMS hom ntawm ntau yam kev qhia, yog cov thev naus laus zis niaj hnub no.
Cov txheej txheem ob kauj ruam: Thaum siv cov txheej txheem ob kauj ruam los tsim cov khoom SMS, cov khoom tiav ntawm cov ntaub spunbonded thiab cov ntaub yaj-sprayed yog unrolled nyob rau hauv ib qho kev txiav txim, thiab tom qab ntawd laminated nyob rau hauv ib qho kev txiav txim, thiab tom qab ntawd consolidated nrog lub zeb kub, thiab compounded rau hauv cov khoom SMS. Txoj kev ob kauj ruam yog characterized los ntawm cov khoom siv yooj yim thiab tus nqi qis. Qhov tseeb, cov txheej txheem "ob kauj ruam" yog cov txheej txheem lamination composite siv dav dav, tab sis kuj tuaj yeem ua ke ntawm lwm cov ntaub ntawv, nrog rau lwm cov ntaub ntawv sib txawv, thiab nrog ntau txoj kev, xws li ultrasonic, kub yaj nplaum peb txheej ntawm cov ntaub ntawv ua ke.
Txoj kev ib-thiab-ib-nrab kauj ruam: hauv txoj kev ob-kauj ruam, nws tseem ua tau los hloov cov ntaub txau uas yaj nrog cov txheej txau uas yaj tsim tawm hauv daim teb, yog li tau txais cov txheej txheem sib xyaw ua ke "ib-nrab kauj ruam". Cov ntaub spunbonded siv ua txheej hauv qab thiab txheej saum npoo los ntawm ob lub cuab yeej unwinding, thiab cov ntaub txau yaj ntawm txheej nruab nrab yog ncaj qha mus rau hauv lub vas los ntawm lub kaw lus txau yaj, pw rau ntawm txheej hauv qab ntawm daim ntaub spunbonded, thiab tom qab ntawd npog nrog txheej sab saud ntawm daim ntaub spunbonded, nws zoo dua los siv lub tshuab zeb kub sib sau ua ke rau hauv cov khoom SMS.
Lub sijhawm tshaj tawm: Cuaj hlis-14-2020