Hauv cov txheej txheem tsim khoom ntawm spunbond nonwoven npuag, ntau yam yuav cuam tshuam rau lub cev ntawm cov khoom. Kev txheeb xyuas kev sib raug zoo ntawm cov khoom no thiab cov khoom ua tau zoo tuaj yeem pab tswj cov txheej txheem kom raug thiab tau txais cov khoom zoo thiab siv tau zoo siv polypropylene spunbond non-woven fabric products. Ntawm no, peb yuav luv luv txheeb xyuas cov ntsiab lus cuam tshuam rau lub cev lub cev ntawm spunbond nonwoven fabrics thiab qhia rau txhua tus.
Melt index thiab molecular hnyav faib ntawm polypropylene slices
Lub ntsiab zoo ntawm polypropylene slices yog molecular hnyav, molecular hnyav tis, isotropy, yaj Performance index, thiab tshauv ntsiab lus. Qhov hnyav molecular ntawm PP chips siv rau spinning yog nyob nruab nrab ntawm 100000 thiab 250000, tab sis kev xyaum qhia tau hais tias cov rheological zog ntawm cov yaj yog qhov zoo tshaj plaws thaum lub molecular hnyav ntawm polypropylene nyob ib ncig ntawm 120000, thiab qhov siab tshaj plaws pub spinning ceev kuj siab. Lub melt index yog ib tug parameter uas qhia txog lub rheological zog ntawm cov yaj, thiab cov yaj index ntawm polypropylene slices siv nyob rau hauv spunbond feem ntau yog nyob nruab nrab ntawm 10 thiab 50. Nyob rau hauv tus txheej txheem ntawm spinning rau hauv ib lub vas sab, cov filament tsuas tau txais ib daim qauv ntawm cov cua ntws, thiab cov qauv ntawm cov filament yog txwv los ntawm cov rheological zog ntawm cov yaj. Qhov loj dua qhov hnyav molecular, uas yog, qhov me me ntawm lub yaj qhov ntsuas, qhov ua tau zoo dua, thiab qhov me dua qhov sib piv tau txais los ntawm cov filament. Nyob rau hauv tib yam kev mob ntawm yaj ejection los ntawm lub nozzle, fiber ntau ntawm cov filament tau kuj loj dua, ua rau ib tug nyuaj tes xav rau spunbond nonwoven fabrics. Yog hais tias lub melt index yog siab, lub viscosity ntawm cov yaj yuav txo, cov rheological zog yog zoo, cov kuj mus stretching txo, thiab nyob rau hauv tib lub stretching tej yam kev mob, lub stretching piv nce. Raws li cov kev taw qhia ntawm macromolecules nce, lub zog tawg ntawm spunbond nonwoven npuag yuav nce ntxiv, thiab qhov zoo ntawm cov filaments yuav txo qis, uas ua rau lub ntsej muag muag ntawm cov ntaub. Nyob rau hauv tib txoj kev, qhov siab dua qhov melt index ntawm polypropylene, qhov me me nws fineness thiab ntau dua nws lub zog tawg.
Qhov hnyav molecular faib feem ntau ntsuas los ntawm qhov sib piv ntawm qhov hnyav nruab nrab molecular hnyav (Mw) rau tus lej nruab nrab molecular hnyav (Mn) ntawm cov polymer (Mw / Mn), hu ua tus nqi molecular yuag. Qhov me me ntawm qhov hnyav molecular faib tus nqi, qhov ruaj khov ntawm cov khoom rheological ntawm cov yaj, thiab qhov ruaj khov dua cov txheej txheem spinning, uas yog qhov tsim nyog rau kev txhim kho spinning ceev. Nws kuj tseem muaj qis dua yaj elasticity thiab tensile viscosity, uas tuaj yeem txo qis kev ntxhov siab, ua rau PP yooj yim rau ncab thiab ua kom zoo dua, thiab tau txais cov fibers zoo dua. Ntxiv mus, lub uniformity ntawm lub network yog zoo, nrog zoo tes xav thiab uniformity.
Spinning kub
Qhov kev teeb tsa ntawm qhov ntsuas kub yog nyob ntawm qhov ntsuas qhov ntsuas ntawm cov khoom siv raw thiab qhov yuav tsum tau ua rau lub cev ntawm cov khoom. Qhov siab dua qhov melt index ntawm cov khoom siv raw, qhov siab dua qhov kub ntawm spinning, thiab vice versa. Lub spinning kub yog ncaj qha ntsig txog lub viscosity ntawm cov yaj, thiab qhov kub thiab txias yog tsawg. Lub viscosity ntawm cov yaj yog siab, ua rau spinning nyuaj thiab nquag ua rau tawg, txhav lossis coarse fibers, uas cuam tshuam rau qhov zoo ntawm cov khoom. Yog li ntawd, txhawm rau txo cov viscosity ntawm cov yaj thiab txhim kho nws cov khoom rheological, txoj kev nce qhov kub thiab txias feem ntau yog siv. Qhov kub spinning muaj qhov cuam tshuam loj rau cov qauv thiab cov khoom ntawm fibers. Qhov qis dua qhov kub spinning, qhov siab dua qhov stretching viscosity ntawm cov yaj, qhov ntau dua qhov stretching tsis kam, thiab qhov nyuaj nws yog stretching filament. Yuav kom tau txais fibers ntawm tib lub fineness, qhov ceev ntawm stretching airflow yuav tsum tau kuj siab nyob rau hauv qis kub. Yog li ntawd, nyob rau hauv tib txoj kev mob, thaum lub spinning kub yog tsawg, cov fibers yog nyuaj rau stretch. Cov fiber ntau muaj lub siab zoo thiab tsis tshua muaj molecular orientation, uas yog manifested nyob rau hauv spunbond nonwoven fabrics uas tsis muaj zog tawg, siab elongation ntawm so, thiab ib tug nyuaj tes xav; Thaum lub spinning kub yog siab, lub fiber stretching yog zoo dua, lub fiber fineness yog me me, thiab lub molecular orientation yog siab dua. Qhov no tau tshwm sim nyob rau hauv lub siab tawg lub zog, me me tawg elongation, thiab mos tes xav ntawm spunbond nonwoven fabrics. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias nyob rau hauv qee qhov txias txias, yog tias qhov kub ntawm qhov kub siab dhau lawm, qhov tshwm sim ntawm filament yuav tsis txias txaus nyob rau lub sij hawm luv luv, thiab qee cov fibers yuav tawg thaum lub sij hawm ncab, uas yuav ua rau muaj teeb meem. Nyob rau hauv qhov tseeb ntau lawm, qhov kub spinning yuav tsum tau xaiv ntawm 220-230 ℃.
Kev ua kom txias txias
Cov cua txias ntawm cov filament muaj feem cuam tshuam rau lub cev lub cev ntawm spunbond nonwoven fabric thaum lub sij hawm tsim cov txheej txheem. Yog tias cov molten polypropylene tuaj yeem ua kom txias sai thiab sib npaug tom qab tawm ntawm lub spinneret, nws cov crystallization qeeb thiab crystallinity tsawg. Cov qauv tsim fiber ntau yog qhov tsis ruaj khov disc-zoo li kua siv lead ua qauv, uas tuaj yeem ncav cuag qhov sib piv loj dua thaum lub sijhawm ncab. Kev taw qhia ntawm cov saw hlau molecular yog qhov zoo dua, uas tuaj yeem ua kom cov crystallinity ntxiv, txhim kho lub zog ntawm cov fiber ntau, thiab txo nws cov elongation. Qhov no yog manifested nyob rau hauv spunbond nonwoven fabrics nrog ntau dua puas lub zog thiab qis elongation; Yog tias maj mam txias, cov txiaj ntsig fibers muaj qhov ruaj khov monoclinic siv lead ua qauv, uas tsis tsim nyog rau fiber ntau stretching. Qhov no yog manifested nyob rau hauv spunbond nonwoven fabrics nrog qis tawg lub zog thiab ntau dua elongation. Yog li ntawd, nyob rau hauv cov txheej txheem molding, ua kom cov cua txias ntim thiab txo qhov kub ntawm lub spinning chamber feem ntau yog siv los txhim kho lub zog tawg thiab txo cov elongation ntawm spunbond nonwoven fabrics. Tsis tas li ntawd, qhov sib txawv ntawm qhov txias ntawm cov filament yog ze rau nws qhov kev ua tau zoo. Hauv kev tsim cov spunbond nonwoven fabrics, qhov txias nyob deb feem ntau xaiv ntawm 50-60cm.
Kev kos duab
Kev taw qhia ntawm cov saw hlau molecular hauv cov kab lo lo ntxhuav yog qhov tseem ceeb cuam tshuam rau lub zog tensile thiab elongation ntawm kev tawg ntawm ib qho filaments. Qhov ntau dua qhov kev taw qhia, qhov muaj zog ntawm ib qho filament thiab qhov me dua qhov elongation ntawm kev tawg. Cov degree ntawm kev taw qhia tuaj yeem sawv cev los ntawm birefringence ntawm filament, thiab qhov loj dua tus nqi, qhov siab dua qhov kev taw qhia. Cov thawj fibers tsim thaum polypropylene yaj tawm ntawm lub spinneret muaj kuj tsis tshua muaj crystallinity thiab orientation, siab fiber ntau brittleness, yooj yim puas, thiab tseem ceeb elongation ntawm tawg. Txhawm rau hloov cov khoom ntawm fibers, lawv yuav tsum tau ncab mus rau qhov sib txawv raws li qhov xav tau ua ntej tsim lub vev xaib. Hauvspunbond ntau lawm, lub zog tensile fiber ntau yog nyob ntawm qhov loj ntawm cov cua txias ntim thiab nqus cua ntim. Qhov loj dua qhov txias thiab nqus cua ntim, qhov nrawm nrawm dua, thiab cov fibers yuav ncav cuag. Lub molecular orientation yuav nce, lub fineness yuav ua finer, lub zog yuav nce, thiab lub elongation ntawm so yuav txo. Ntawm qhov nrawm nrawm ntawm 4000m / min, polypropylene filament ncav cuag nws tus nqi saturation ntawm birefringence, tab sis nyob rau hauv cov huab cua ntws stretching txheej txheem ntawm spinning mus rau hauv lub web, qhov tseeb ceev ntawm cov filament feem ntau nyuaj tshaj 3000m / min. Yog li ntawd, nyob rau hauv cov xwm txheej uas muaj zog xav tau siab, lub stretching ceev yuav ua siab loj nce. Txawm li cas los xij, nyob rau hauv qhov xwm txheej ntawm qhov ntim cua txias tas li, yog tias qhov nqus cua ntim ntau dhau lawm thiab qhov txias ntawm cov filament tsis txaus, cov fibers nquag tawg ntawm qhov chaw extrusion ntawm qhov tuag, ua rau kev puas tsuaj rau lub taub hau txhaj tshuaj thiab cuam tshuam rau kev tsim khoom thiab cov khoom zoo. Yog li ntawd, kev kho kom tsim nyog yuav tsum tau ua hauv kev tsim khoom tiag tiag.
Lub cev muaj zog ntawm spunbond nonwoven fabrics tsis tsuas yog cuam tshuam nrog cov khoom ntawm fibers, tab sis kuj rau lub network qauv ntawm cov fibers. Qhov zoo dua cov fibers, qhov siab dua qhov kev tsis sib haum xeeb hauv kev teeb tsa ntawm cov fibers thaum nteg cov net, qhov sib txawv ntawm lub net yog, ntau fibers muaj nyob rau hauv ib cheeb tsam, qhov me dua qhov longitudinal thiab transverse zog piv ntawm lub vas, thiab ntau dua lub zog tawg. Yog li nws muaj peev xwm txhim kho qhov sib xws ntawm spunbond non-woven npuag khoom thiab txhim kho lawv lub zog tawg los ntawm kev ua kom lub tshuab nqus tsev ntim. Txawm li cas los xij, yog tias qhov nqus cua ntim loj dhau, nws yooj yim ua rau cov hlau tawg, thiab qhov ncab yog muaj zog heev. Kev taw qhia ntawm cov khoom siv polymer zoo li ua tiav, thiab crystallinity ntawm cov polymer yog siab dhau, uas yuav txo qhov cuam tshuam lub zog thiab elongation ntawm kev tawg, nce brittleness, thiab yog li ua rau txo qis zog thiab elongation ntawm cov ntaub tsis-woven. Raws li qhov no, nws tuaj yeem pom tias lub zog thiab elongation ntawm spunbond nonwoven fabrics nce thiab txo qis tsis tu ncua nrog qhov nce ntawm nqus cua ntim. Hauv kev tsim khoom tiag tiag, nws yog qhov yuav tsum tau kho cov txheej txheem kom tsim nyog raws li qhov xav tau thiab qhov xwm txheej tiag tiag kom tau txais cov khoom zoo.
Kub dov kub
Lub web fibers tsim los ntawm stretching fibers yog nyob rau hauv ib tug xoob lub xeev thiab yuav tsum tau kub-dov thiab bonded los ua ntaub. Kub dov kev sib raug zoo yog txheej txheem uas cov fibers hauv lub vev xaib yog qee qhov muag thiab yaj los ntawm cov dov kub nrog qee qhov siab thiab kub, thiab cov fibers tau sib koom ua ke los tsim cov ntaub. Qhov tseem ceeb yog tswj qhov kub thiab txias kom zoo. Kev ua haujlwm ntawm cua sov yog kom muag thiab yaj cov fibers. Qhov kev faib ua feem ntawm softened thiab melted fibers txiav txim lub cev lub zog ntawmspunbond nonwoven ntaub. Ntawm qhov kub thiab txias, tsuas yog ib feem me me ntawm fibers nrog qis molecular hnyav soften thiab yaj, thiab muaj ob peb fibers sib txuas ua ke nyob rau hauv siab. Cov fibers hauv lub vev xaib fiber ntau yog plam, thiab cov ntaub tsis-woven muaj qis dua lub zog tab sis ntau dua elongation. Cov khoom zoo li mos, tab sis nws yooj yim rau fuzzing; Raws li qhov kub dov kub maj mam nce, tus nqi ntawm softened thiab melted fibers nce, lub fiber web daim ntawv cog lus yuav nruj dua, cov fibers tsis tshua muaj plam, lub zog tawg ntawm non-woven npuag nce, thiab elongation tseem kuj loj. Ntxiv mus, vim muaj zog affinity ntawm fibers, elongation me ntsis nce; Thaum qhov kub nce siab, feem ntau ntawm cov fibers ntawm lub siab taw tes yaj, thiab cov fibers ua yaj lumps, pib ua nkig. Lub sijhawm no, lub zog ntawm cov ntaub tsis-woven pib txo qis, thiab elongation kuj txo qis. Cov tes xav tias nyuaj heev thiab nkig, thiab lub zog tsim kua muag kuj tsawg. Tsis tas li ntawd, cov khoom sib txawv muaj qhov sib txawv ntawm qhov hnyav thiab tuab, thiab qhov kub thiab txias ntawm qhov kub dov zeb kuj txawv. Rau cov khoom nyias, muaj cov fibers tsawg dua ntawm qhov kub dov, thiab cov cua sov tsawg yog xav tau rau softening thiab melting, yog li qhov yuav tsum tau kub dov kub yog qis dua. Raws li txoj cai, rau cov khoom tuab, qhov kub dov kub yuav tsum tau siab dua.
Kub dov siab
Nyob rau hauv cov txheej txheem kub dov kev sib txuas, lub luag hauj lwm ntawm cov kub dov zeb kab siab yog kom compact lub web fibers, ua rau cov fibers nyob rau hauv lub web mus rau ib co deformation tshav kub thiab tag nrho exert cov nyhuv ntawm tshav kub conduction thaum lub sij hawm kub dov txheej txheem, ua lub softened thiab melted fibers nruj nreem bonded ua ke, ua rau adhesion quab yuam ntawm fibers, thiab ua rau nws nyuaj rau fibers. Thaum lub kub dov kab siab tsis tshua muaj, fiber ntau compaction ceev ntawm lub siab taw tes nyob rau hauv lub fiber web yog tsis zoo, lub fiber bonding zog tsis siab, tuav quab yuam ntawm fibers yog tsis zoo, thiab cov fibers kuj yooj yim rau plam. Lub sijhawm no, txhais tes xav ntawm spunbond non-woven npuag yog qhov muag, qhov tawg elongation kuj loj, thiab lub zog tawg yog qhov tsawg; Ntawm qhov tsis sib xws, thaum txoj kab siab yog qhov siab, qhov tshwm sim spunbond non-woven npuag muaj qhov nyuaj dua txhais tes, qis elongation thaum tawg, tab sis muaj zog tawg ntau dua. Txawm li cas los xij, thaum txoj kab siab ntawm cov kub dov zeb siab dhau lawm, cov softened thiab melted polymer ntawm qhov kub dov point ntawm lub web fiber yog nyuaj rau ntws thiab diffuse, uas kuj txo qhov nro ntawm cov ntaub tsis-woven. Tsis tas li ntawd, qhov teeb tsa ntawm txoj kab siab kuj tseem cuam tshuam nrog qhov hnyav thiab tuab ntawm cov ntaub tsis-woven. Hauv kev tsim khoom, kev xaiv tsim nyog yuav tsum tau ua raws li qhov xav tau txhawm rau tsim cov khoom lag luam uas ua tau raws li qhov yuav tsum tau ua.
Nyob rau hauv xaus, lub cev thiab mechanical zog ntawmpolypropylene spunbond non-woven npuagcov khoom tsis yog txiav txim los ntawm ib qho tseem ceeb, tab sis los ntawm kev sib xyaw ua ke ntawm ntau yam. Hauv kev tsim khoom tiag tiag, cov txheej txheem tsim nyog yuav tsum raug xaiv raws li qhov xav tau tiag tiag thiab cov xwm txheej tsim khoom txhawm rau tsim cov khoom lag luam zoo spunbond non-woven npuag uas tuaj yeem ua tau raws li ntau yam kev xav tau. Tsis tas li ntawd, kev tswj hwm nruj nruj ntawm cov kab ntau lawm, ua tib zoo saib xyuas cov khoom siv, thiab kev txhim kho cov neeg ua haujlwm zoo thiab kev ua haujlwm zoo kuj yog qhov tseem ceeb hauv kev txhim kho cov khoom 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-29-2024