Cov qauv ntawm PP melt-blown lim caij yog cov qauv nrog tuab txheej fibers, nyias sab hauv fibers, xoob txheej txheej, thiab nruj txheej txheej. Qhov tshwj xeeb gradient qhov tob pom ua rau peb-dimensional lim residue nyhuv, uas muaj cov yam ntxwv ntawm siab porosity, siab tuav tus nqi, loj av tuav peev, loj txaus tus nqi thiab tsis tshua muaj siab poob.
Cov txheej txheem yaj-tshuab yog ib yam ntawm cov txheej txheem tsis-woven ntawm extruding polymers. Nws tshwm sim nyob rau hauv thaum ntxov 1950s. Txhawm rau sau cov khoom siv hluav taws xob uas tsim los ntawm kev sim nuclear, US Naval Laboratory tau pib tsim cov ntaub ntawv lim nrog cov txiaj ntsig zoo tshaj plaws. Xyoo 1954 tau tshaj tawm cov kev tshawb fawb. kuv lub teb chaws cov tshuab meltblown pib thaum xyoo 1950s thiab thaum ntxov 1960s, thiab cov khoom siv tau kawm tsis tu ncua. Los ntawm lig 1960s thiab thaum ntxov 1970s, tus naj npawb ntawm batch meltblown khoom nyob rau hauv Tuam Tshoj tau mus txog ntau tshaj 200. Nruam ntau lawm kab tau qhia los ntawm Teb Chaws Asmeskas thiab lub teb chaws Yelemees nyob ib ncig ntawm 1992-94. Txog tam sim no, nws tau kwv yees tias tseem muaj ntau dua 300 cov khoom siv hluav taws xob sib cuam tshuam hauv kev ua haujlwm thoob plaws tebchaws.
Nyob rau hauv txoj kev xav, txhua yam thermoplastic (siab kub melting, tsis kub curing) polymer nti raw cov ntaub ntawv yuav siv tau nyob rau hauv cov txheej txheem ntawm meltblown lim ntsiab. Polypropylene yog cov khoom siv dav siv ntau tshaj plaws rau cov txheej txheem yaj. Tsis tas li ntawd, cov khoom siv feem ntau siv polymer chip raw khoom rau yaj cov txheej txheem muaj xws li polyester, polyamide, polyethylene, PTFE, polystyrene, PBT, EMA, EVA, thiab lwm yam. Olefin polymer raw cov ntaub ntawv (xws li polypropylene) muaj qib siab ntawm polymerization, yog li Cov cua kub kub yog 100 degree siab tshaj nws cov ntsiab lus melting kom muaj peev xwm yaj tau zoo, thaum lub cua sov kub ntawm polyester yog me ntsis siab dua nws melting point. Olefin feedstocks feem ntau tsis xav kom qhuav.
Cov yam ntxwv ntawm PP meltblown lim caij yog tias cov fiber ntau zoo kuj yog me me, feem ntau tsawg dua 10 microns, thiab feem ntau ntawm fiber ntau fineness yog nyob nruab nrab ntawm 1 thiab 4 microns.
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