Nyob rau hauv cov txheej txheem ntau lawm ntawmPP non-woven npuag, ntau yam yuav cuam tshuam rau lub cev ntawm cov khoom. Kev txheeb xyuas kev sib raug zoo ntawm cov khoom no thiab kev ua haujlwm ntawm cov khoom yuav pab tswj cov txheej txheem kom raug thiab tau txais cov khoom zoo thiab siv tau zoo PP non-woven fabrics. Hauv qab no, Chengxin's non-woven fabric editor yuav luv luv txheeb xyuas cov ntsiab lus cuam tshuam rau lub cev ntawm PP non-woven fabrics, thiab qhia rau txhua tus neeg:
1. Melt Performance index thiab molecular hnyav tis ntawm PP non-woven npuag polypropylene chips
Cov cim tseem ceeb ntawm polypropylene chips yog qhov hnyav molecular, molecular hnyav tis, tsis tu ncua, yaj Performance index, thiab cov hmoov tshauv. PP chips siv rau spinning muaj qhov hnyav ntawm 100000 thiab 250000, tab sis kev xyaum tau pom tias cov khoom rheological ntawm cov yaj yog qhov zoo tshaj plaws thaum qhov hnyav molecular ntawm polypropylene yog nyob ib ncig ntawm 120000, thiab nws qhov siab tshaj plaws pub spinning ceev kuj siab. Lub melt index yog ib qho parameter uas qhia txog cov khoom rheological ntawm cov yaj, thiab cov yaj index ntawm polypropylene chips siv rau.spunbondfeem ntau yog nyob nruab nrab ntawm 10 thiab 50. Thaum lub sij hawm spinning txheej txheem, lub filament tsuas yog tau txais ib tug airflow cua ntsawj ntshab, thiab cov cua ntsawj ntshab ratio ntawm cov filament yog txwv los ntawm lub rheological zog ntawm cov yaj.
Qhov loj dua qhov hnyav molecular, piv txwv li qhov me me ntawm qhov ntsuas kub, qhov tsis zoo ntawm nws cov khoom rheological. Qhov me me ntawm qhov sib piv tau txais los ntawm cov filament, qhov loj ntawm fiber ntau ntawm cov filament tau txais nyob rau hauv tib tus nqi ntawm yaj ejected los ntawm spinneret, uas ua rau ib tug nyuaj tes xav rau PP non-woven ntaub. Yog hais tias lub melt index yog siab, lub viscosity ntawm cov yaj yuav txo, cov rheological zog yog zoo, thiab cov kuj mus stretching txo. Nyob rau hauv tib yam stretching tej yam kev mob, ntau yam ntawm stretching nce. Raws li kev taw qhia ntawm macromolecules nce, lub zog tawg ntawm PP tsis-woven npuag yuav nce, thiab cov fiber ntau ntawm cov ntaub yuav txo qis, ua rau cov ntaub mos mos ntawm cov ntaub. Nyob rau hauv tib txoj kev, qhov siab dua qhov ntsuas ntawm polypropylene, qhov me dua nws cov fiber ntau, thiab ntau dua nws lub zog tawg.
Qhov hnyav molecular faib feem ntau ntsuas los ntawm qhov sib piv (Mw / Mn) ntawm qhov hnyav nruab nrab molecular hnyav (Mw) rau tus lej nruab nrab molecular hnyav (Mn) ntawm cov polymer, hu ua tus nqi molecular yuag. Qhov me me ntawm qhov hnyav molecular faib tus nqi, qhov ruaj khov ntawm cov khoom rheological ntawm nws cov yaj, thiab qhov ruaj khov dua cov txheej txheem spinning, uas yog qhov tsim nyog rau kev txhim kho cov spinning ceev. Nws kuj muaj qis dua yaj elasticity thiab tensile viscosity, uas tuaj yeem txo qhov kev ntxhov siab, ua rau PP yooj yim rau ncab thiab zoo, thiab tau txais cov fibers zoo dua. Ntxiv mus, lub uniformity ntawm lub web tsim yog zoo, nrog zoo tes xav thiab uniformity.
2. PP non-woven npuag spinning kub
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 rau lub cev ntawm cov khoom. Qhov siab dua qhov ntsuas qhov ntsuas ntawm cov khoom siv raw, qhov siab dua qhov sib xyaw spinning kub, 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 yog feem ntau saws. Qhov kub spinning muaj qhov cuam tshuam loj rau cov qauv thiab cov khoom ntawm fibers. Qhov qis dua qhov ntsuas kub, qhov siab dua qhov tensile viscosity ntawm cov yaj, qhov ntau dua qhov tensile kuj, thiab qhov nyuaj dua nws yog kom ncab cov filament kom tau txais tib lub fiber ntau.
Post lub sij hawm: Mar-16-2024