Raws li cov khoom siv tseem ceeb rau lub qhov ncauj qhov ntswg, cov ntaub meltblown tsis ntev los no tau dhau los ua cov khoom kim heev hauv Suav teb, nce siab li huab cua. Kev lag luam tus nqi ntawm siab yaj Performance index polypropylene (PP), raw khoom rau meltblown fabrics, kuj skyrocketed, thiab lub domestic petrochemical kev lag luam tau sparked ib nthwv dej ntawm kev hloov mus rau siab yaj Performance index polypropylene cov ntaub ntawv.
Los ntawm txoj kev, nws yuav tsum tau muab sau tseg tias cov ntaub ntawv meltblown tiag tiag yog biodegradable. Feem ntau siv 2040 hauv kev ua lag luam tsuas yog cov khoom siv PP nkaus xwb, thiab cov ntaub ntawv PP tiag tiag yog txhua yam hloov kho. Tam sim no, rau cov tshuab me me (hloov extruders) ntawm kev ua lag luam, siv cov khoom siv fluidity meltblown siab tsis ruaj khov. Lub tshuab loj dua, qhov zoo dua ntawm kev siv cov khoom siv meltblown PP siab. Cov teeb meem zoo ntawm cov tshuab me me lawv tus kheej suav nrog ntau qhov laj thawj. Cov ntaub meltblown tsis tu ncua yuav tsum tau siv 1500 yaj ntiv tes tshwj xeeb meltblown cov ntaub ntawv, nrog rau kev sib ntxiv ntawm cov polar masterbatch thiab cov txheej txheem kev kho polar los ntxiv txhim kho pom kev ua haujlwm.
Niaj hnub no, tus editor tau sau ib tsab xov xwm hais txog cov yam ntxwv ntawm kev hloov khoPP cov ntaub ntawv meltblown, vam tias yuav pab tau txhua tus. Yog tias koj xav tsim cov ntaub meltblown uas ua tau raws li lub teb chaws tus qauv KN90, KN95, thiab KN99, koj yuav tsum muaj kev nkag siab txog tag nrho cov txheej txheem tsim khoom, txheeb xyuas cov txheej txheem omissions, thiab ua rau lawv. Ua ntej, cia peb pib nrog cov khoom siv yaj yaj.
Cov ntsiab lus siab melting yog hais txog cov khoom siv PP yaj
Kev tsim lub ntsej muag tsis tuaj yeem ua yam tsis muaj spunbond npuag thiab cov ntaub meltblown, ob qho tib si yog cov khoom siv PP siab melting point tom qab degradation. Qhov siab dua qhov ntsuas qhov ntsuas ntawm PP siv los ua cov ntaub meltblown, qhov zoo dua cov fibers tshuab tawm, thiab qhov zoo dua qhov pom kev ua haujlwm ntawm cov ntaub meltblown. PP nrog qis molecular hnyav thiab nqaim molecular hnyav faib yog yooj yim dua los tsim fibers nrog zoo uniformity.
Cov khoom siv raw rau kev tsim S-txheej (spunbond npuag) ntawm lub qhov ncauj qhov ntswg feem ntau yog siab yaj Performance index PP nrog lub yaj Performance index ntawm 35-40, thaum cov khoom tsim M-txheej (meltblown ntaub) yog meltblown qib PP nrog ib tug ntau dua melt index (1500). Kev tsim tawm ntawm ob hom kev siab melting point PP tsis tuaj yeem sib cais los ntawm cov khoom siv tseem ceeb, uas yog cov organic peroxide degradation tus neeg sawv cev.
Vim tias qhov qis qis qis ntawm cov PP zoo tib yam, nws cov dej ntws hauv lub xeev molten tsis zoo, uas txwv nws daim ntawv thov hauv qee thaj chaw. Los ntawm kev ntxiv cov organic peroxides los hloov cov polypropylene, cov yaj index ntawm PP tuaj yeem nce ntxiv, nws qhov hnyav molecular tuaj yeem txo qis, thiab qhov hnyav molecular faib ntawm PP tuaj yeem nqaim, ua rau muaj kev ntws zoo dua thiab siab dua cov duab kos. Yog li, PP hloov kho los ntawm cov organic peroxide degradation tuaj yeem siv dav hauv cov phab ntsa nyias nyias thiab cov ntaub tsis-woven.
Muaj ntau cov tshuaj peroxide degrading
Organic peroxides yog Chav Kawm 5.2 cov tshuaj lom neeg uas muaj kev txwv nruj heev rau kev tsim khoom, khaws cia, kev thauj mus los, thiab siv. Tam sim no, tsuas muaj ob peb cov organic peroxides tsuas yog siv rau PP degradation hauv Suav teb. Nov yog qee qhov:
Tom ntej: Butyl Peroxide DTBP
Nws cov yam ntxwv tseem ceeb yog raws li nram no:
Tsis pom zoo los ntawm FDA rau ntxiv rau hauv PP, tsis pom zoo rau kev tsim khoom noj khoom haus qib thiab cov khoom noj huv huv.
Lub teeb nyem tsuas yog 6 ℃, thiab nws yog qhov tsis tshua muaj hluav taws xob zoo li qub. 0.1MJ ntawm lub zog yog txaus rau ignite nws vapor, ua rau nws yooj yim rau flash thiab tawg ntawm chav tsev kub; Txawm tias muaj kev tiv thaiv nitrogen, nws tseem tuaj yeem nyem thiab tawg hauv ib puag ncig saum 55 ℃.
Lub conductivity coefficient yog tsawg heev, ua rau nws yooj yim mus sau nqi thaum lub sij hawm khiav.
DTBP tau raug cais tawm los ntawm European Chemicals Agency (ECHA) hauv 2010 raws li Qib 3 ua rau cov noob hloov pauv thiab tsis tuaj yeem pom zoo siv los ua ib qho ntxiv hauv kev sib cuag zaub mov thiab kev sib cuag ncaj qha nrog tib neeg cov khoom, vim tias muaj kev pheej hmoo siab ua rau biotoxicity.
2,5-dimethyl-2,5-bis (tert butylperoxy) hexane (xa mus rau "101")
Tus neeg saib xyuas degradation no yog ib qho ntawm cov peroxides ntxov tshaj plaws siv hauv kev ua haujlwm ntawm PP degradation. Vim nws qhov kub thiab txias ntau thiab cov ntsiab lus siab ntawm cov pa oxygen reactive, nrog rau nws qhov kev pom zoo los ntawm FDA hauv Tebchaws Meskas thiab BfR kev pom zoo hauv Tebchaws Europe, nws tseem yog tus neeg sawv cev degradation siv dav hauv daim teb no. Vim muaj cov ntsiab lus siab ntawm cov khoom tsis sib haum xeeb hauv nws cov khoom decomposition, uas feem ntau yog volatile tebchaw nrog muaj zog pungent tsw, lub resulting siab melting point PP muaj ib tug muaj zog saj. Tshwj xeeb tshaj yog rau cov ntaub ntawv meltblown siv hauv kev tsim daim npog ntsej muag, qhov sib ntxiv ntawm cov tshuaj degradation ntau tuaj yeem ua rau muaj teeb meem tsw tsw phem rau cov ntaub ntub dej hauv qab.
3,6,9-Triethyl-3,6,9-Trimethyl-1,4,7-Triperoxynonane (xa mus rau "301")
Piv nrog rau lwm cov degradation agents, 301 muaj kev ruaj ntseg zoo heev thiab degradation efficiency, nrog rau tsis tshua muaj ntxhiab tsw, ua rau nws yog ib qho kev xaiv rau degrading PP. Nws qhov zoo yog raws li nram no:
● Muaj kev nyab xeeb dua
Tus kheej accelerating decomposition kub yog 110 ℃, thiab lub flash point kuj siab li 74 ℃, uas muaj peev xwm tiv thaiv kom txhob decomposition thiab flash ignition ntawm degradation tus neeg saib xyuas thaum lub sij hawm pub mis. Nws yog cov khoom lag luam peroxide uas muaj kev nyab xeeb tshaj plaws ntawm cov neeg ua haujlwm degradation paub.
● Ua haujlwm ntau dua
Vim muaj peb daim ntawv cog lus peroxide nyob rau hauv ib lub molecule, qhov sib ntxiv ntawm tib qho kev faib ua feem ntawm cov pa oxygen reactive tuaj yeem muab cov dawb radicals ntau dua, txhim kho kev ua haujlwm ntawm degradation.
Tsawg tsw
Piv nrog "Ob chav 25", cov tshuaj tsis haum uas tsim los ntawm nws cov decomposition tsuas yog ib feem kaum ntawm lwm cov khoom, thiab hom volatile tebchaw yog cov tsis tshua muaj ntxhiab esters, tsis muaj irritating volatile tebchaw. Yog li ntawd, nws muaj peev xwm heev txo cov tsw ntawm cov khoom, uas yuav pab tau kom tsim high-end kev lag luam nrog nruj ntxiv tsw ntawm cov khoom yuav txo tau tus nqi ntxiv. degrading PP cov khoom thaum lub sij hawm cia thiab kev thauj mus los, yog li zoo txhim kho kev nyab xeeb.
Txawm hais tias DTBP tsis raug pom zoo los ua tus neeg sawv cev degradation rau kev hloov kho PP, tseem muaj qee cov tuam txhab tsim khoom siv DTBP ua tus neeg sawv cev degradation los tsim cov siab yaj index PP, uas ua rau muaj kev nyab xeeb ntau hauv cov txheej txheem tsim khoom thiab cov chaw siv tom ntej. Cov khoom uas tau tshwm sim kuj muaj teeb meem tsw ntxhiab, thiab muaj kev pheej hmoo siab ntawm kev tsis lees paub lossis tsis ua tiav kev xeem thaum xa tawm mus rau thoob ntiaj teb kev ua lag luam.
Dongguan Liansheng Nonwoven Technology Co., Ltd.tau tsim nyob rau hauv lub Tsib Hlis 2020. Nws yog ib tug loj-scale non-woven npuag ntau lawm enterprise integrating kev tshawb fawb thiab kev loj hlob, ntau lawm, thiab muag khoom. Nws tuaj yeem tsim ntau yam xim ntawm PP spunbond non-woven fabrics nrog qhov dav ntawm tsawg dua 3.2 meters los ntawm 9 grams mus rau 300 grams.
Post lub sij hawm: Nov-09-2024