Chinthu chachikulu cha masks ndipolypropylene sanali nsalu nsalu(yomwe imadziwikanso kuti nsalu yosalukidwa), yomwe ndi yopyapyala kapena yowoneka ngati yopangidwa kuchokera ku ulusi wansalu kudzera kulumikiza, kuphatikizika, kapena njira zina zamankhwala ndi makina. Masks opangira opaleshoni nthawi zambiri amapangidwa ndi zigawo zitatu za nsalu zosalukidwa, zomwe ndi nsalu ya spunbond yosalukidwa S, nsalu yosungunula yopanda nsalu M, ndi nsalu ya spunbond yosalukidwa S, yomwe imadziwika kuti kamangidwe ka SMS; Wosanjikiza wamkati amapangidwa ndi nsalu wamba yopanda nsalu, yomwe imakhala ndi khungu lokondana komanso lopatsa chinyezi; Chosanjikiza chakunja chimapangidwa ndi nsalu yopanda madzi yopanda madzi, yomwe imakhala ndi ntchito yotsekereza zakumwa ndipo imagwiritsidwa ntchito makamaka kutsekereza zakumwa zopopera ndi wovala kapena ena; Wosanjikiza wapakati nthawi zambiri amapangidwa ndi polypropylene melt yowombedwa yopanda nsalu yomwe yakhala ndi polarized polarized, yomwe imatha kusefa mabakiteriya ndikuchitapo kanthu potsekereza ndi kusefa.
Mzere wopanga chigoba chodzipangira chokha umathandizira kwambiri kupanga masks. Mipukutu ikuluikulu ya nsalu zopanda nsalu za polypropylene zimadulidwa kukhala masikono ang'onoang'ono ndikuyikidwa pamzere wopanga chigoba. Makinawa amayika ngodya yaying'ono ndikuchepetsa pang'onopang'ono ndikusonkhanitsa kuchokera kumanzere kupita kumanja. Malo a chigoba amapanikizidwa ndi piritsi, ndipo njira monga kudula, kusindikiza m'mphepete, ndi kukanikiza kumachitika. Pogwiritsa ntchito makina opanga makina, zimangotenga pafupifupi masekondi 0.5 kuti mzere wolumikizira fakitale upange chigoba. Pambuyo popanga, masks amathiridwa mankhwala ophera tizilombo toyambitsa matenda ndi ethylene oxide ndikusiyidwa kuti akhazikike kwa masiku 7 asanasindikizidwe, kupakidwa, kuikidwa m'bokosi, ndikutumizidwa kuti akagulitse.
Chinthu chachikulu cha masks - polypropylene fiber
Zosanjikiza zosefera (M wosanjikiza) pakati pa masks azachipatala ndi nsalu yosungunula yowombedwa, yomwe ndi yofunika kwambiri pachimake, ndipo chinthu chachikulu ndi polypropylene melt blown zida zapadera. Nkhaniyi ili ndi mawonekedwe othamanga kwambiri, osasunthika otsika, komanso kugawa kwapang'onopang'ono kwa maselo. Zosefera zomwe zimapangidwa zimakhala ndi zosefera zolimba, zotchingira, zotsekereza, komanso kuyamwa kwamafuta, zomwe zimatha kukwaniritsa milingo yosiyanasiyana ya kuchuluka kwa ulusi pagawo lililonse komanso malo oyambira a masks azachipatala. Toni imodzi ya polypropylene fiber yosungunuka imatha kupanga pafupifupi 250000 polypropylene N95 masks oteteza kuchipatala, kapena masks 900000 mpaka 1 miliyoni otayira.
Mapangidwe a zinthu zosefera za polypropylene zosungunula zimapangidwa ndi ulusi wambiri wodutsa wokhazikika molunjika, wokhala ndi ulusi wapakati wa 1.5 ~ 3 μ m, pafupifupi 1/30 ya m'mimba mwake mwa tsitsi la munthu. Makina osefera a polypropylene kusungunula zosefera zomwe zimawombedwa makamaka zimaphatikizapo zinthu ziwiri: chotchinga chamakina ndi ma electrostatic adsorption. Chifukwa cha ulusi wa ultrafine, malo akuluakulu enieni, porosity yayikulu, ndi kukula kwa pore pang'ono, zosefera za polypropylene zosungunuka zili ndi chotchinga chabwino cha bakiteriya komanso kusefera. Zosefera za polypropylene zimasungunuka zili ndi ntchito ya electrostatic adsorption pambuyo pa chithandizo cha electrostatic.
Kukula kwa buku la coronavirus ndilaling'ono kwambiri, pafupifupi 100 nm (0.1 μ m), koma kachilomboka sikungakhaleko palokha. Zimapezeka makamaka mumadzimadzi ndi m'malovu pamene mukuyetsemula, ndipo kukula kwa madontho kumakhala pafupifupi 5 μ m. Pamene kachilombo munali m'malovu kuyandikira meltblown nsalu, iwo adzakhala electrostatically adsorbed padziko, kuwalepheretsa kudutsa wandiweyani wapakatikati wosanjikiza ndi kukwaniritsa chotchinga kwenikweni. Chifukwa chakuti kachilomboka ndi kovuta kwambiri kuchotsa kuyeretsa pambuyo kugwidwa ndi ultrafine electrostatic ulusi, ndipo kusamba kungathenso kuwononga electrostatic kuyamwa luso, mtundu wa chigoba angagwiritsidwe ntchito kamodzi kokha.
Kumvetsetsa kwa Polypropylene Fiber
Ulusi wa polypropylene, womwe umadziwikanso kuti PP CHIKWANGWANI, nthawi zambiri umatchedwa polypropylene ku China. Ulusi wa polypropylene ndi ulusi wopangidwa ndi polymerizing propylene ngati zopangira kuti apange polypropylene, kenako ndikudutsa njira zingapo zopota. Mitundu yayikulu ya polypropylene imaphatikizapo ulusi wa polypropylene, polypropylene short fiber, polypropylene split fiber, polypropylene expanded filament (BCF), polypropylene industrial thorn, polypropylene non-woven fabric, polypropylene ndudu tow, etc.
Ulusi wa polypropylene umagwiritsidwa ntchito makamaka pama carpets (pansi pa carpet ndi suede), nsalu zokongoletsera, nsalu za mipando, zingwe zosiyanasiyana, maukonde osodza, kumva mafuta, zida zomangirira, zida zomangira, ndi nsalu zamakampani monga nsalu zosefera, thumba lachikwama, etc. Ulusi wa polypropylene ultrafine ukhoza kugwiritsidwa ntchito kupanga nsalu zapamwamba za zovala; Ulusi wopangidwa ndi polypropylene hollow ulusi ndi wopepuka, wofunda, komanso wosalala bwino.
Kukula kwa Polypropylene Fiber
Ulusi wa polypropylene ndi mtundu wa fiber womwe unayamba kupanga mafakitale m'ma 1960. Mu 1957, Natta et al. woyamba anapanga isotactic polypropylene ndi kukwaniritsa mafakitale kupanga. Posakhalitsa, kampani ya Montecatini inagwiritsa ntchito kupanga ulusi wa polypropylene. Mu 1958-1960, kampaniyo idagwiritsa ntchito polypropylene kupanga CHIKWANGWANI ndipo idatcha Meraklon. Pambuyo pake, kupanga kudayambanso ku United States ndi Canada. Pambuyo pa 1964, ulusi wa polypropylene wogawanika kuti amangirire adapangidwa ndikupangidwa kukhala ulusi wansalu ndi ulusi wa carpet kudzera mu fibrillation yopyapyala ya filimu.
M'zaka za m'ma 1970, njira zazifupi zopota ndi zida zinathandizira kupanga ulusi wa polypropylene. Pa nthawi yomweyo, kukodzedwa mosalekeza filament anayamba kugwiritsidwa ntchito mu makampani pamphasa, ndi kupanga ulusi wa polypropylene anayamba mofulumira. Pambuyo pa 1980, chitukuko cha polypropylene ndi matekinoloje atsopano opangira ulusi wa polypropylene, makamaka kutulukira kwazitsulo za metallocene, kunasintha kwambiri utomoni wa polypropylene. Chifukwa chakusintha kwa stereoregularity (isotropy mpaka 99.5%), mtundu wamkati wa ulusi wa polypropylene wakula kwambiri.
Chapakati pa zaka za m'ma 1980, ulusi wa polypropylene Ultra-fine unalowa m'malo mwa ulusi wina wa thonje wa nsalu zansalu ndi nsalu zopanda nsalu. Pakalipano, kafukufuku ndi chitukuko cha ulusi wa polypropylene akugwiranso ntchito m'mayiko osiyanasiyana padziko lonse lapansi. Kutchuka ndi kuwongolera kwaukadaulo wosiyanasiyana wopanga ulusi wakulitsa kwambiri magawo ogwiritsira ntchito ulusi wa polypropylene.
Mapangidwe a polypropylene fibers
Polypropylene ndi molekyulu yayikulu yokhala ndi maatomu a kaboni monga unyolo waukulu. Kutengera makonzedwe apakati a magulu ake a methyl, pali mitundu itatu yamitundu itatu: mwachisawawa, iso wokhazikika, ndi meta wokhazikika. Ma atomu a carbon omwe ali pamndandanda waukulu wa mamolekyu a polypropylene ali mu ndege imodzi, ndipo magulu awo amtundu wa methyl amatha kukonzedwa m'malo osiyanasiyana mkati ndi pansi pa ndege yayikulu.
Kupanga ulusi wa polypropylene kumagwiritsa ntchito isotactic polypropylene yokhala ndi isotropy yoposa 95%, yomwe imakhala ndi crystallinity yayikulu. Mapangidwe ake ndi unyolo wozungulira wokhazikika wokhala ndi mawonekedwe atatu. Unyolo waukulu wa molekyulu umapangidwa ndi maunyolo opindika a atomu ya kaboni pa ndege yomweyo, ndipo magulu am'mbali a methyl ali mbali imodzi ya ndege yayikulu. Izi crystallization si dongosolo wokhazikika unyolo munthu, komanso ali ndi unyolo wokhazikika stacking mu mbali yoyenera ya unyolo olamulira. Kuwala kwa ulusi woyamba wa polypropylene ndi 33% ~ 40%. Pambuyo kutambasula, crystallinity imawonjezeka kufika 37% ~ 48%. Pambuyo pa chithandizo cha kutentha, crystallinity imatha kufika 65% ~ 75%.
Ulusi wa polypropylene nthawi zambiri umapangidwa ndi njira yosungunulira yozungulira. Nthawi zambiri, ulusiwo ndi wosalala komanso wowongoka munjira yotalikirapo, yopanda mikwingwirima, ndipo imakhala ndi gawo lozungulira. Amalutidwanso kukhala ulusi wosakhazikika komanso ulusi wophatikiza.
Mawonekedwe a ulusi wa polypropylene
Kapangidwe
Chinthu chachikulu cha polypropylene ndi mawonekedwe ake opepuka, okhala ndi kachulukidwe ka 0.91g/cm ³, omwe ndi opepuka kuposa madzi komanso 60% yokha ya kulemera kwa thonje. Ndi mitundu yopepuka kwambiri yopepuka pakati pa ulusi wamankhwala wamba, 20% yopepuka kuposa nayiloni, 30% yopepuka kuposa poliyesitala, ndi 40% yopepuka kuposa ulusi wa viscose. Ndizoyenera kupanga zovala zamasewera amadzi.
Thupi katundu
Polypropylene imakhala ndi mphamvu zambiri komanso kutalika kwa 20% -80%. Mphamvu imachepa ndi kuwonjezeka kwa kutentha, ndipo polypropylene imakhala ndi modulus yapamwamba kwambiri. Kutha kwake kuchira kumafanana ndi nayiloni 66 ndi poliyesitala, komanso kuposa acrylic. Makamaka, mphamvu yake yochira zotanuka mwachangu ndiyokulirapo, kotero kuti nsalu ya polypropylene imakhalanso yosamva kuvala. Nsalu ya polypropylene simakonda kukwinya, chifukwa chake imakhala yolimba, kukula kwa zovala kumakhala kokhazikika, komanso sikupunduka mosavuta.
Kuyamwa kwachinyontho ndi ntchito yopaka utoto
Pakati pa ulusi wopangidwa, polypropylene imakhala ndi mayamwidwe oyipa kwambiri, ndipo pafupifupi chinyezi chimabwereranso pansi pamikhalidwe yamlengalenga. Choncho, mphamvu zake zowuma ndi zonyowa komanso mphamvu zothyoka zimakhala zofanana, zomwe zimapangitsa kuti zikhale zoyenera kupanga maukonde ophera nsomba, zingwe, nsalu zosefera, ndi zopyapyala zopangira mankhwala. Polypropylene imakonda kukhala ndi magetsi osasunthika komanso ma pilling pakagwiritsidwa ntchito, ndikuchepa kwapang'onopang'ono. Nsaluyo ndi yosavuta kuchapa ndi kuuma mwamsanga, ndipo imakhala yolimba. Chifukwa cha kusayamwa bwino kwa chinyezi komanso kunyowa akavala, polypropylene nthawi zambiri imasakanizidwa ndi ulusi wokhala ndi chinyezi chambiri ikagwiritsidwa ntchito munsalu.
Polypropylene imakhala ndi mawonekedwe a macromolecular nthawi zonse komanso crystallinity yayikulu, koma ilibe magulu ogwira ntchito omwe amatha kulumikizana ndi mamolekyu a utoto, zomwe zimapangitsa kuti utoto ukhale wovuta. Utoto wamba sungathe kuukongoletsa. Kugwiritsa ntchito utoto wobalalika popaka utoto wa polypropylene kumatha kubweretsa mitundu yopepuka komanso kusathamanga kwamtundu. Kupititsa patsogolo ntchito ya utoto wa polypropylene kumatha kutheka kudzera m'njira monga kumezanitsa copolymerization, utoto woyambirira wamadzimadzi, ndi kusinthidwa kwazitsulo.
Mankhwala katundu
Polypropylene imatsutsana kwambiri ndi mankhwala, tizilombo toyambitsa matenda, ndi nkhungu. Kukhazikika kwake motsutsana ndi asidi, alkali, ndi mankhwala ena kumaposa ulusi wina wopangidwa. Polypropylene ali ndi kukana kwabwino kwa dzimbiri mankhwala, kupatula moyikira nitric asidi ndi moyikira caustic koloko. Ili ndi kukana bwino kwa asidi ndi alkali, ndikupangitsa kuti ikhale yoyenera kugwiritsidwa ntchito ngati zosefera komansozonyamula katundu.Komabe, kukhazikika kwake kwa zosungunulira za organic ndizovuta pang'ono.
Kukana kutentha
Polypropylene ndi ulusi wa thermoplastic wokhala ndi malo ocheperako komanso malo osungunuka kuposa ulusi wina. Kutentha kwa malo ochepetsetsa ndi 10-15 ℃ kutsika kuposa malo osungunuka, zomwe zimapangitsa kuti kutentha kusakhale kovuta. Pakupaka utoto, kumaliza, ndi kugwiritsa ntchito polypropylene, ndikofunikira kusamala ndi kutentha kuti mupewe kupunduka kwa pulasitiki. Mukatenthedwa pakauma (monga kutentha kopitilira 130 ℃), polypropylene imasweka chifukwa cha okosijeni. Choncho, anti-aging agent (heat stabilizer) nthawi zambiri amawonjezeredwa popanga polypropylene fiber kuti apititse patsogolo kukhazikika kwa polypropylene fiber. Koma polypropylene imakhala yabwino kukana chinyezi ndi kutentha. Wiritsani m'madzi otentha kwa maola angapo popanda mapindikidwe.
Magwiridwe Ena
Polypropylene imakhala ndi kuwala kosakwanira komanso kukana kwa nyengo, imakonda kukalamba, siilimbana ndi kusita, ndipo iyenera kusungidwa kutali ndi kuwala ndi kutentha. Komabe, katundu woletsa kukalamba akhoza kupangidwa bwino powonjezera anti-aging agent panthawi yozungulira. Kuphatikiza apo, polypropylene imakhala ndi magetsi abwino, koma imakonda kukhala ndi magetsi osasunthika panthawi yokonza. Polypropylene sizovuta kuwotcha. Ulusiwo ukachepa ndi kusungunuka m’lawi lamoto, lawilo likhoza kuzimitsa lokha. Ikatenthedwa, imapanga chipika chowoneka bwino chokhala ndi fungo la asphalt pang'ono.
Dongguan Liansheng Non Woven Technology Co., Ltd.idakhazikitsidwa mu Meyi 2020. Ndi bizinesi yayikulu yopanda nsalu yopanga nsalu kuphatikiza kafukufuku ndi chitukuko, kupanga, ndi malonda. Itha kupanga mitundu yosiyanasiyana ya nsalu za PP spunbond zosalukidwa ndi m'lifupi mwake osakwana 3.2 metres kuchokera ku 9 magalamu mpaka 300 magalamu.
Nthawi yotumiza: Oct-14-2024