Polypropylene, hu ua PP, yog ib qho thermoplastic resin siv ua raw khoom rau spinning los ntawm synthetic fibers, uas yog tau los ntawm polymerization ntawm allomorphic polypropylene ntawm propylene. Ntau yam khoom siv niaj hnub yog ua los ntawm polypropylene yas, xws li cov thawv noj su pov tseg pob tshab, cov thawv microwave, qee cov khob kis las, thiab lwm yam.
Keeb kwm ntawm polypropylene
Thaum ntxov, txoj kev polymerization ntawm propylene tsuas yog tuaj yeem tau txais cov khoom lag luam branched nrog qib qis ntawm polymerization, uas yog ib qho amorphous txo cov tshuaj thiab tsis muaj txiaj ntsig zoo hauv Suav teb.
Xyoo 1954,
Ziegler thiab Natta tau tsim cov catalyst zieglei-natta thiab ua cov polypropylene crystalline nrog cov qauv zoo sib xws, hu ua isomorphic polypropylene lossis isotactic polypropylene.
Cov txiaj ntsig tshawb fawb ntawm qhov teeb meem no tau qhib cov kev taw qhia tshiab hauv kev ua cov ntaub ntawv polymerization thiab tso lub hauv paus rau kev txhim kho kev lag luam loj ntawm polypropylene muaj peev xwm tsim khoom thiab nws daim ntawv thov dav hauv kev tsim khoom thiab kev tswj hwm cov ntaub ntawv yas thiab lwm yam khoom siv fiber hauv Suav teb.
Kev tsim khoom lag luam ntawm isostatic polypropylene tau pom thawj zaug hauv xyoo 1957 los ntawm lub tuam txhab Italian Momecatini. Txij xyoo 1958 txog 1960, lub tuam txhab siv polypropylene rau kev tsim fiber thiab tsim polypropylene fiber, hu ua Meraklon, uas kuj tau tsim nyob rau hauv Tebchaws Meskas thiab Canada.
Xyoo 1963,
Xibfwb ziegler thiab natta yeej qhov khoom plig Nobel. Tom qab xyoo 1964, peb tau tsim cov polypropylene zaj duab xis fibers rau strapping thiab ua textile fibers thiab cov ntaub pua plag yarns. Xyoo 1970, cov txheej txheem spinning luv luv thiab cov khoom siv tau txhim kho cov thev naus laus zis ntawm polypropylene fiber hauv Suav teb.
Interphase, bulk continuous filament (BCF) siv tau thaum pib los ntawm cov ntaub pua plag thiab kev lag luam. Tam sim no, 90% ntawm lub ntiaj teb cov ntaub pua plag thiab 25% ntawm cov ntaub pua plag yog ua los ntawm polyene fibers.
Xyoo 1980,
Nrog rau kev tsim cov thev naus laus zis tshiab rau kev tsim cov polypropylene thiab polypropylene fibers, tshwj xeeb tshaj yog cov catalysts metalliferous thiab kev tsim cov cuminskine, qhov zoo ntawm polypropylene resins tau zoo dua qub.
Vim nws cov qauv zoo dua qub (txhua yam muaj tib qho kev ua haujlwm ntawm 99.5%), qhov zoo ntawm polypropylene fiber tau zoo dua heev. Los ntawm nruab nrab xyoo 1980, tshwj xeeb, cov fiber polypropylene zoo hloov qee cov paj rwb fibers, cov ntaub rau textiles thiab nonwovens, cov iav fibers uas muaj zog dua es tsis yog paj rwb lossis los ntawm polypropylene fibers tau ua tiav zoo heev.
Tebchaws Meskas, Western Europe pib siv kev lag luam tsim kho. Ntxiv BCF spinning tshuab, cua texturing tshuab thiab composite spinning tshuab thiab nonwoven ntaub thiab kev loj hlob sai ntawm kev tshwm sim ntawm ib kauj ruam kev loj hlob hauv kev siv cov kho kom zoo nkauj thiab kev lag luam ntawm polypropylene fiber ntxiv nthuav dav.
Ntxiv rau kev tshawb fawb thoob ntiaj teb thiab kev txhim kho ntawm polypropylene fiber, kev txhim kho ntawm cov thev naus laus zis ntawm cov fiber sib txawv yog qhov ua haujlwm heev, uas tau nthuav dav daim ntawv thov ntawm polypropylene fiber. Vim tias Tuam Tshoj polypropylene muaj cov khoom siv kho tshuab zoo, tsis muaj tshuaj lom, qis tus nqi sib piv, kub, tshuaj lom neeg tsis kam;
Polypropylene tau dhau los ua ib lub tuam txhab tsim khoom tshiab thiab tsim khoom tshiab uas loj hlob sai tshaj plaws thiab nquag tshaj plaws ntawm tsib lub tuam txhab tsim khoom dav dav hauv Suav teb vim nws cov yam ntxwv kab lis kev cai xws li kev yooj yim ntawm kev ua, thev naus laus zis, prototyping thiab rov siv dua, thiab nws cov kev ua tau zoo thiab tus nqi.
Polypropylene siv tau dav hauv kev ntim khoom noj, khoom siv hauv tsev txhua hnub, tsheb, khoom siv hauv tsev, khaub ncaws, kev ua liaj ua teb, kev lag luam tshuaj fiber, khoom siv kho mob thiab kev lag luam dav dav.
Xyoo 2004,
Lub peev xwm tsim khoom polypropylene thoob ntiaj teb tau txog 42080kt, ntawm cov khoom siv fiber 12435kt, kwv yees li 31.7%, peb lub teb chaws kuj yog qib kev loj hlob ntawm kev tsim khoom polypropylene sai tshaj plaws.
Polypropylene muaj dab tsi ua nrog cov ntaub yaj-sprayed?
Cov tshuaj tsuag yaj uas tsis yog woven
Cov tshuaj tsuag yaj (yaj tshuab molding) yog cov txheej txheem tsis yog woven extruded los ntawm polymer. Nws yog cov khoom siv lim dej tsim los ntawm US navy hauv xyoo 1954 los sau cov khoom siv radioactive los ntawm kev sim nuclear. Tom qab ntawd nyob ib puag ncig xyoo 1965, exxon, 3M thiab lwm tus tau tsim thawj tiam ntawm cov khoom siv yaj tsuag tsis yog woven.
Lub hauv paus ntsiab lus ntawm kev ua cov qauv nozzle orifice qhov polymer nyias nyias ntawm huab cua kub extruded los ntawm melting muaj qhov ceev ceev kom tsim cov superfine fiber lossis mesh screen ntawm sab saud solidification thiab coalescing nruas.
Cov ntaub ntawv fusion-spraying yog cov ntaub tsis-woven uas tsim los ntawm fusion-spraying nrog cov tuab tuab dua, thiab qhov kev npaj random thiab interlayer ntawm cov fibers tsim cov qauv ntaub ntawv ntau-bending channel ntawm cov ntaub ntawv fusion-spraying. Tsuas yog txoj kev no thiaj li cov khoom me me (tus kab mob coronavirus tshiab los ntawm aerosol) tuaj yeem ua rau muaj kev sib tsoo kab lis kev cai nrog lwm cov fibers thiab raug ntes.
Cov txheej txheem lim dej ntawm cov ntaub npog qhov ncauj phais yog xim av diffusion, interception, inertia collision, gravity deposition thiab electrostatic adsorption. Plaub thawj zaug yog cov yam ntxwv ntawm lub cev, uas yog, cov ntaub tsis-woven tsim los ntawm txoj kev melting spray muaj tus yam ntxwv ntawm kev lim dej txog li 35%; Qhov no tsis ua tau raws li qhov yuav tsum tau ua ntawm cov ntaub npog qhov ncauj phais. Peb yuav tsum polarize cov khoom, cia cov fiber them, thiab ntes cov kab mob coronavirus tshiab hauv aerosol nrog hluav taws xob static.
Daim ntaub tsuag yaj yog dab tsi?
Nws yog ib hom ntaub uas tsis yog ntaub uas yaj. Qhov laj thawj uas koj feem ntau pom lub npe ntawm lub ntsej muag "yaj tsuag" tsis ntev los no hauv kev sib tham yog vim tias feem ntau lub ntsej muag ua tiav qhov kev lim dej zoo los ntawm cov txheej txau.
Yog li ntawd, cov lus hais ntawm cov ntsiab lus tsis yog, polypropylene yog ib hom khoom siv kawm, thiab daim ntaub txau yaj yog ib hom ntaub tsis-woven, ob qho no tsis sib npaug.
Qhov tseeb, muaj qee qhov kev sib raug zoo ntawm ob qho no, kwv yees li 70% ~ 80% ntawm kev ua lag luam yog ua los ntawm polypropylene. Cov ntaub npog qhov ncauj ib txwm muaj, txhua yam yog ua los ntawm polypropylene. Tab sis ua ntej, yog tias lub ntaub npog qhov ncauj yog ua los ntawm polypropylene, qhov muaj tsis tas yuav yog txheej txau molten.
Lub Npog Ncauj Tiv Thaiv Ib Zaug Xwb
Daim ntaub tsuag uas yaj lawm yog lub plawv ntawm lub npog ntsej muag
Peb tuaj yeem muab ib qho piv txwv, N95 lub ntsej muag rau cov lag luam dav dav kom txais yuav cov qauv network ntau txheej, hu ua SMS qauv: sab hauv thiab sab nraud ob sab ntawm ib txheej spunbonded (S); Nruab nrab yog txheej molten tsuag (M), uas feem ntau muab faib ua ib txheej lossis los ntawm ntau txheej.
Zaj duab xis ntsej muag dav hlau yog PP spunbond yaj tsuag PP spunbond feem ntau, kuj tuaj yeem ua ib txheej ntawm cov fiber luv luv, txhawm rau txhim kho kev kov ntawm daim tawv nqaij. Peb-seem goblet lub ntsej muag feem ntau yog PET polyester koob paj rwb + fused tsuag + koob paj rwb lossis PP spunbonded.
Feem ntau siv los cais cov tee dej ntawm cov neeg mob; Cov ntaub tsis-woven uas tau kho tshwj xeeb muaj kev lim dej zoo, tiv thaiv, rwb thaiv tsev thiab nqus roj, uas yog cov khoom siv tseem ceeb rau kev tsim lub ntsej muag. Cov txheej sab hauv yog cov ntaub tsis-woven uas siv ntau. Txawm hais tias cov txheej spunbonded (S) thiab cov txheej fused spray (M) ntawm lub ntsej muag yog cov ntaub tsis-woven ua los ntawm polypropylene, cov txheej txheem tsim khoom txawv.
Ntawm lawv, cov hlwb fibrous spunbonded ntawm ob sab ntawm sab hauv thiab sab nraud yog cov tuab tuab, txog li 20 microns hauv txoj kab uas hla. Cov fibers nruab nrab fusion-spray txheej feem ntau tsuas yog 2 microns hauv txoj kab uas hla thiab yog ua los ntawm cov khoom siv polypropylene composite uas tuaj yeem hu ua cov fibers siab-fusion-fat.
Saum toj no txog kev qhia txog melting spray polypropylene, peb yog cov kws tshaj lij tsis-woven ntaub tsim khoom, cov khoom: koob weaving nonwoven ntaub,cov ntaub tsis-woven spunbonded,cov ntaub geotextile tsis woven, thiab lwm yam, txais tos sab laj! ~
Lub sijhawm tshaj tawm: Plaub Hlis-14-2020