Hauv cov txheej txheem tsim khoom ntawm spunbonded nonwovens, ntau yam yuav cuam tshuam rau lub cev ntawm cov khoom.
Kev tsom xam ntawm cov ntsiab lus tseem ceeb cuam tshuam rau cov khoom siv ntaub yog pab tau los tswj cov txheej txheem kom raug thiab tau txais zoo PP spunbonded nonwovens nrog zoo zoo kom haum rau cov neeg siv khoom.
1.Polypropylene hom: yaj index thiab molecular hnyav
Lub ntsiab zoo indexes ntawm polypropylene cov khoom yog molecular hnyav, molecular hnyav tis, isotacticity, yaj Performance index thiab tshauv.
Polypropylene cov chaw muag khoom yog nyob rau sab saud ntawm cov saw yas, muab cov khoom siv polypropylene rau ntau qib thiab cov lus qhia tshwj xeeb.
Ua spunbond nonwoven, polypropylene molecular hnyav feem ntau yog nyob ntawm thaj tsam 100,000-250,000.Txawm li cas los xij, nws tau raug pov thawj tias cov cuab yeej yaj ua tau zoo tshaj plaws thaum qhov hnyav molecular yog li 120000. Qhov siab tshaj plaws spinning ceev kuj siab ntawm qib no.
Melt Performance index yog ib qho parameter qhia txog rheological zog ntawm yaj.Lub melt index ntawm PP particle rau spunbond yog feem ntau ntawm 10 thiab 50.
Qhov me me yaj Performance index yog, qhov hnyav dua qhov fluidity yog, qhov me me ntawm qhov sib piv yog, thiab qhov loj ntawm cov fiber ntau uas nyob rau hauv cov xwm txheej ntawm tib lub yaj tso tawm los ntawm spinneret, yog li cov nonwovens qhia ntau zog txhais tes.
Thaum yaj index loj dua, cov viscosity ntawm cov yaj yuav txo qis, cov cuab yeej rheological tuaj zoo dua, thiab cov kev tsim tawm kuj txo.Nyob rau hauv tib txoj kev ua haujlwm, cov ntawv sau ntau ntxiv.Nrog rau kev nce qib ntawm kev taw qhia ntawm macromolecules, lub zog tawg ntawm nonwoven yuav raug txhim kho, thiab cov xov paj loj yuav raug txo qis, thiab cov ntaub yuav zoo li softer. Nrog rau cov txheej txheem tib yam, qhov siab dua qhov ntsuas kub, lub zog tawg ua haujlwm zoo dua. .
2. Kev kub ceev
Qhov kev teeb tsa ntawm qhov kub thiab txias yog nyob ntawm qhov ntsuas qhov ntsuas ntawm cov khoom siv raw thiab cov kev xav tau ntawm lub cev ntawm cov khoom.Qhov siab dua qhov melt index yuav tsum tau siab dua spinning kub, thiab vice versa.Lub spinning kub yog ncaj qha ntsig txog cov yaj viscosity.Vim lub siab viscosity ntawm yaj, nws yog ib qho nyuaj rau tig, ua rau tawg, txhav lossis ntxhib xov paj, uas cuam tshuam rau cov khoom zoo.
Yog li ntawd, txhawm rau txo cov viscosity ntawm cov yaj thiab txhim kho cov khoom rheological ntawm yaj, nce qhov kub thiab txias feem ntau yog siv.Qhov kub spinning muaj qhov cuam tshuam zoo rau cov qauv thiab cov khoom ntawm fibers.
Thaum lub spinning kub teem dua, lub zog tawg yog siab dua, qhov tawg elongation yog me me, thiab ntaub zoo li mos.
Nyob rau hauv kev xyaum, lub spinning kub feem ntau teem 220-230 ℃.
3. Txias tus nqi
Hauv kev tsim cov txheej txheem ntawm spunbonded nonwovens, qhov cua txias ntawm cov xov paj muaj kev cuam tshuam zoo rau lub cev ntawm spunbonded nonwovens.
Yog tias fiber ntau txias maj mam, nws tau ruaj khov monoclinic siv lead ua qauv, uas tsis yog qhov tsim nyog rau cov fibers los kos. Yog li ntawd, nyob rau hauv cov txheej txheem molding, txoj kev ua kom cov cua txias ntim thiab txo qhov kub ntawm lub spinning chamber feem ntau yog siv los txhim kho lub rhuav lub zog thiab txo qhov elongation ntawm spunbonded non-woven npuag.Tsis tas li ntawd, qhov txias txias ntawm cov xov paj kuj tseem cuam tshuam nrog nws cov khoom.Nyob rau hauv kev tsim cov spunbonded non-woven fabrics, qhov txias deb yog feem ntau ntawm 50 cm thiab 60 cm.
4. Cov xwm txheej ntawm kev kos duab
Lub orientation degree ntawm molecular saw nyob rau hauv filament yog ib qho tseem ceeb uas cuam tshuam rau lub breaking elongation ntawm monofilament.
Lub uniformity thiab tawg lub zog ntawm spunbonded nonwovens tuaj yeem txhim kho los ntawm kev ua kom lub tshuab nqus tsev ntim.Txawm li cas los xij, yog tias qhov nqus cua ntim loj dhau lawm, nws yooj yim rau kev tawg cov xov paj, thiab cov cua ntsawj ntshab hnyav dhau lawm, kev taw qhia ntawm cov polymer zoo li ua tiav, thiab cov crystallinity ntawm cov polymer yog siab dhau, uas yuav txo tau cov khoom siv. cuam tshuam lub zog thiab elongation ntawm kev tawg, thiab ua rau kom brittleness, ua rau txo qis ntawm lub zog thiab elongation ntawm cov ntaub tsis-woven.Nws tuaj yeem pom tias lub zog thiab elongation ntawm spunbonded nonwovens nce thiab txo qis tsis tu ncua nrog qhov nce ntawm nqus cua ntim.Hauv kev tsim khoom tiag tiag, cov txheej txheem yuav tsum tau hloov kho raws li qhov xav tau thiab qhov xwm txheej tiag tiag thiaj li yuav tau txais cov khoom zoo.
5. Kub dov kub
Tom qab lub vev xaib tsim los ntawm kev kos duab, nws yog xoob thiab yuav tsum tau sib koom ua ke los ntawm kub dov.Tus yuam sij yog tswj qhov kub thiab txias.Kev ua haujlwm ntawm cua sov yog ua kom mos thiab yaj cov fiber ntau.Qhov kev faib ua feem ntawm softened thiab fused fibers txiav txim lub cev muaj zog ntawm PP spunbond nonwoven ntaub.
Thaum qhov kub thiab txias pib qis heev, tsuas yog ib feem me me fibers uas tsis tshua muaj molecular hnyav soften thiab yaj, ob peb fibers yog sib koom ua ke nyob rau hauv lub siab.Cov fibers nyob rau hauv lub web yog yooj yim rau plam, lub zog tawg ntawm cov ntaub tsis-woven yog me me thiab lub elongation yog loj, thiab cov ntaub zoo li mos tab sis ua tau los ua fuzz;
Thaum qhov kub dov kub nce, qhov nyiaj ntawm softened thiab melted fiber ntau nce, lub web fiber yog sib txuas zoo, tsis yooj yim rau plam.Lub zog tawg ntawm cov ntaub tsis-woven nce, thiab elongation tseem loj.Ntxiv mus, vim muaj zog affinity ntawm cov fibers, lub elongation nce me ntsis;
Thaum kub nce siab heev, lub zog ntawm nonwovens pib txo, qhov elongation kuj txo qis heev, koj xav tias cov ntaub ua tawv thiab nkig, thiab lub zog tsim kua muag txo.Rau cov khoom tuab tuab, muaj cov fibers tsawg dua ntawm qhov kub dov thiab tsawg dua. cua sov yuav tsum tau rau softening thiab melting, yog li kub dov kub yuav tsum tau txo qis.Sib piv, rau cov khoom tuab, qhov kub dov kub yog siab dua.
6. Kub dov siab
Nyob rau hauv cov txheej txheem ntawm kev sib txuas ntawm kub dov, kev ua haujlwm ntawm kub dov zeb kab siab yog ua kom cov softened thiab melted fibers daim ntawv cog lus ua ke nyob ze, ua kom cov cohesion ntawm cov fibers, thiab ua rau cov fibers tsis yooj yim rau plam.
Thaum qhov kub-dov kab siab tsis tshua muaj, qhov ntom ntom ntawm fiber ntau ntawm qhov nias yog qhov tsis zoo, qhov sib txuas ntawm fiber ntau tsis siab, thiab kev sib koom ua ke ntawm fibers tsis zoo.Lub sijhawm no, txhais tes xav ntawm spunbonded non-woven npuag yog qhov muag, qhov elongation ntawm kev tawg yog qhov loj, tab sis lub zog tawg yog qhov tsawg;
ntawm qhov tsis sib xws, thaum txoj kab siab yog qhov siab, txhais tes xav ntawm spunbonded non-woven npuag yog qhov nyuaj, thiab qhov elongation ntawm kev tawg yog qhov qis tab sis lub zog tawg yog siab dua.Qhov chaw kub dov siab muaj ntau yam ua rau qhov hnyav thiab tuab ntawm cov ntaub tsis-woven.Txhawm rau tsim cov khoom uas ua tau raws li qhov yuav tsum tau ua, nws yog ib qho tsim nyog los xaiv qhov tsim nyog kub dov siab raws li qhov xav tau.
Hauv ib lo lus, cov khoom siv lub cev ntawm cov ntaub tsis-woven yog qhov tshwm sim ntawm kev sib cuam tshuam ntawm ntau yam.Txawm tias tib cov ntaub tuab, kev siv ntaub sib txawv yuav xav tau cov txheej txheem tech sib txawv.Yog li cov neeg siv khoom tsis txaus ntseeg tau nug cov ntaub siv. npaj ntau lawm nrog lub hom phiaj tshwj xeeb thiab muab cov neeg siv khoom txaus siab tshaj plaws nonwoven ntaub.
Raws li 17 xyoo chaw tsim khoom, Fuzhou Heng Hua New Material Co., Ltd.muaj kev ntseeg siab muab ntaub raws li cov neeg siv khoom xav tau.Peb tau xa tawm mus rau ntau lub teb chaws thiab cheeb tsam thiab tau txais kev qhuas los ntawm cov neeg siv khoom.
Txais tos sab laj peb thiab pib kev koom tes ntev nrog Henghua Nonwoven!
Post lub sij hawm: Apr-16-2021
