Dab tsi yog kev tsim khoom lag luam ntawm pp meltblown lim keeb?

Tus qauv ntawm PP yaj cov tshuab lim lub ntsej muag yog cov tuab tuab fiber sab, txheej sab hauv nyias daim nyias nyias, cov txheej hauv lub ntsej muag, thiab lub hau kaw ntawm lub taub. Cov cim xim sib sib zog nqus txheej txheem tsim cov duab lim dej peb zaug, uas muaj cov yam ntxwv ntawm kev ua kom muaj siab, muaj qhov tsis lees txais siab, cov av loj tuav tau, cov dej ntws loj, thiab lub siab poob qis.

Cov txheej txheem meltblown yog hom ntawm cov txheej txheem tsis-woven polymer extrusion txheej txheem. Nws tshwm sim thaum xyoo 1950. Txhawm rau txhawm rau khaws cov pa hluav taws xob uas tsim los ntawm kev sim tshuaj nuclear hauv US Naval Laboratory, nws tau pib tsim cov ntawv lim dej ultrafine. Cov kev tshawb fawb tshaj tawm hauv lub xyoo. Tuam Tshoj lub meltblown thev naus laus zis pib xyoo 1950 thiab thaum 1960, thiab cov cuab yeej siv kawm tau cuam tshuam nrog. Thaum xyoo 1960 thiab thaum xyoo 1970, cov xov tooj ntawm Tuam Tshoj cov khoom siv sib xyaw tau mus txog ntau dua 200. Cov kab txuas ntxiv tau tsim los ntawm Tebchaws Asmeskas thiab Yelemes thaj tsam ntawm 92-94. Txog tam sim no, kwv yees tias tseem muaj ntau tshaj 300 lub sij hawm sib txuas ntawm cov khoom siv meltblown hauv kev ua haujlwm thoob plaws teb chaws.

Hauv cov tswv yim, txhua qhov thermoplastic (kub txias melting, tsis tshua muaj kev kub nyhiab tua) polymer nti raw cov ntaub ntawv tuaj yeem siv rau hauv kev tsim cov txheej txheem ntawm meltblown lim ntsiab. Polypropylene yog cov feem ntau siv cov khoom siv raw rau cov txheej txheem meltblown. Tsis tas li ntawd, cov khoom siv sib xyaw ua ke polymer rau cov txheej txheem meltblown yog polyester, polyamide, polyethylene, polytetrafluoroethylene, polystyrene, PBT, thiab EMA. , EVA, thiab lwm yam. Olefin polymer cov ntaub ntawv raw (xws li polypropylene) muaj qhov sib txawv ntawm polymerization, yog li ntawd yog tias qhov cua sov kub dua nws cov taw tes los ntawm 100 ° C, nws tuaj yeem yaj tau yooj yim, thaum polyester tuaj yeem yaj tau yog tias cov cua sov kub dua me ntsis siab dua nws cov taw tes melting. Olefins feem ntau tsis tas yuav tsum tau muab ziab.

Cov qauv ntawm PP meltblown lim keeb yog tias cov khoom siv fiber zoo yog tsawg, feem ntau tsawg dua 10 microns, thiab feem ntau ntawm cov xim fiber ntau ntawm 1 ~ 4 microns.

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