Nplaim Retardants: Qhov thib ob loj tshaj roj hmab thiab yas additives
Nplaim retardantyog tus neeg sawv cev pabcuam siv los tiv thaiv cov ntaub ntawv los ntawm kev ignited thiab inhibit hluav taws propagation.Nws yog tsuas yog siv nyob rau hauv cov ntaub ntawv polymer.Nrog rau kev siv dav ntawm cov khoom siv hluavtaws thiab kev txhim kho ntawm cov qauv kev tiv thaiv hluav taws, cov nplaim hluav taws kub hnyiab tau siv dav hauv cov yas, roj hmab, txheej, thiab lwm yam. Raws li cov ntsiab lus tseem ceeb hauv FR, nws tuaj yeem muab faib ua peb pawg: cov nplaim taws inorganic. retardants, organic halogenated nplaim retardants thiab organic phosphorus nplaim retardants.
Inorganic nplaim retardantsua hauj lwm lub cev, uas muaj tsawg efficiency thiab loj npaum li cas ntxiv.Nws muaj qee yam cuam tshuam rau kev ua haujlwm ntawm cov khoom siv.Txawm li cas los xij, vim yog tus nqi qis nws tuaj yeem siv rau hauv cov khoom siv qis nrog cov kev xav tau ntawm kev ua tau zoo, xws li cov yas PE, PVC, thiab lwm yam. Siv aluminium hydroxide (ATH) ua piv txwv. mus txog 200 ℃.Cov txheej txheem decomposition absorbs tshav kub thiab dej evaporation, thiaj li yuav inhibit qhov kub ntawm cov khoom, txo qhov kub ntawm cov khoom nto, qeeb ceev ntawm thermal cracking cov tshuaj tiv thaiv.Nyob rau tib lub sijhawm, dej vapor tuaj yeem dilute cov pa oxygen concentration thiab tiv thaiv combustion.Lub alumina tsim los ntawm decomposition yog txuas nrog rau cov khoom nto, uas tuaj yeem cuam tshuam kev sib kis ntawm hluav taws.
Organic halogen nplaim retardantsfeem ntau yog siv tshuaj lom neeg txoj kev.Nws efficiency yog siab thiab qhov sib ntxiv yog samll nrog zoo compatibility nrog polymers.Lawv tau siv dav hauv cov khoom siv hluav taws xob, cov ntawv luam tawm hauv Circuit Court thiab lwm yam khoom siv hluav taws xob.Txawm li cas los xij, lawv yuav tawm cov pa phem thiab corrosive gases, uas muaj qee yam teeb meem kev nyab xeeb thiab kev tiv thaiv ib puag ncig.Brominated nplaim retardants (BFRs)Feem ntau yog hom halogenated nplaim retardants.Lwm tus yogchloro-series hluav taws kub retardants (CFRs).Lawv qhov decomposition kub zoo ib yam li cov ntaub ntawv polymer.Thaum cov polymers tau rhuab thiab decomposed, BFRs kuj pib decompose, nkag mus rau cov roj theem combustion cheeb tsam ua ke nrog thermal decomposition khoom, inhibit cov tshuaj tiv thaiv thiab tiv thaiv cov nplaim hluav taws.Nyob rau tib lub sijhawm, cov roj tso tawm npog lub ntsej muag ntawm cov khoom siv los thaiv thiab dilute cov pa oxygen concentration, thiab thaum kawg qeeb cov tshuaj tiv thaiv combustion kom txog thaum nws raug txiav.Tsis tas li ntawd, BFRs feem ntau yog siv ua ke nrog antimony oxide (ATO).ATO nws tus kheej tsis muaj nplaim hluav taws kub, tab sis tuaj yeem ua raws li lub zog ua kom nrawm nrawm ntawm bromine lossis chlorine decomposition.
Organic phosphorus nplaim retardants (OPFRs)ua haujlwm ob lub cev thiab tshuaj, nrog rau kev ua haujlwm siab thiab qhov zoo ntawm cov tshuaj lom neeg tsawg, ua haujlwm ntev thiab kev ua haujlwm siab.Tsis tas li ntawd, nws tseem tuaj yeem txhim kho kev ua haujlwm fluidity ntawm cov hlau, muab plasticizing muaj nuj nqi thiab kev ua haujlwm zoo heev. Nrog rau cov kev xav tau siab dua ntawm kev tiv thaiv ib puag ncig, OPFRs maj mam hloov BFRs ua cov khoom lag luam loj.
Txawm hais tias qhov sib ntxiv ntawm FR tsis tuaj yeem ua rau cov khoom siv tiv thaiv hluav taws, nws tuaj yeem zam qhov "flash burn" tshwm sim, txo qhov tshwm sim ntawm hluav taws thiab yeej muaj txiaj ntsig zoo rau cov neeg nyob hauv qhov hluav taws kub.Kev ntxiv dag zog rau lub teb chaws cov cai rau cov nplaim hluav taws xob thev naus laus zis kuj ua rau txoj kev vam meej ntawm FRs dav dua.
Post lub sij hawm: Nov-19-2021