IiRetardants zomlilo: Eyesibini enkulu yeRubber kunye nezongezo zePlastiki
Ukubuyiswa komliloi-arhente encedisayo esetyenziselwa ukuthintela izinto ezivuthayo kunye nokuthintela ukwanda komlilo.Isetyenziswa kakhulu kwizinto zepolymer.Ngokusetyenziswa okubanzi kwezinto zokwenziwa kunye nokuphuculwa ngokuthe ngcembe kwemigangatho yokukhusela umlilo, i-retardants yomlilo isetyenziswa ngokubanzi kwiiplastiki, irabha, i-coatings, njl njl. Ngokwezinto eziphambili zeekhemikhali eziluncedo kwi-FR, inokwahlulwa ibe ngamacandelo amathathu: ilangatye elingaphiliyo. iiretardants, i-organic halogenated flame retardants kunye neorganic phosphorus flame retardants.
Iinorganic retardants ilangatyeisebenza ngokwasemzimbeni, enokusebenza okuphantsi kunye nomthamo omkhulu wokongezwa.Inempembelelo ethile ekusebenzeni kwezinto.Nangona kunjalo, ngenxa yexabiso eliphantsi linokusetyenziswa kwiimveliso eziphantsi kunye neemfuno eziphantsi zokusebenza, ezifana neeplastiki ze-PE, i-PVC, njl. Thatha i-aluminium hydroxide (ATH) njengomzekelo.Iya kuphelelwa ngamanzi kunye nokubola emva kokutshisa. ukuya kuthi ga kuma-200 ℃.Inkqubo yokubola ifunxa ubushushu kunye nokunyuka kwamanzi, ukuze kuthintele ukunyuka kweqondo lokushisa kwezinto, ukunciphisa ubushushu bomhlaba wezinto eziphathekayo, ukucotha isantya sokusabela kokuqhekeka kwe-thermal.Kwangaxeshanye, umphunga wamanzi unokunciphisa i-oksijini yoxinaniso kwaye uthintele ukutsha.I-alumina eveliswa ngokubola iqhotyoshelwe kumphezulu wezinto eziphathekayo, ezinokuthi zithintele ngakumbi ukusasazeka komlilo.
Organic halogen idangatye retardantsubukhulu becala bamkele indlela yeekhemikhali.Ukusebenza kwayo kuphezulu kwaye ukongezwa isamll kunye nokuhambelana kakuhle kunye neepolymers.Zisetyenziswa ngokubanzi kwi-electronic castings, iibhodi zeesekethe eziprintiweyo kunye nezinye izinto zombane.Nangona kunjalo, baya kukhupha iigesi ezinobuthi kunye ne-corrosive, ezineengxaki ezithile zokhuseleko kunye nokhuseleko lokusingqongileyo.Iiretardants zeBrominated flame (BFRs)ikakhulu zinobubele halogenated flame retardants.Omnye nguyeii-chloro-series retardants (CFRs).Ubushushu babo bokubola bufana nelo lezinto zepolymer.Xa iipolymers zifudumala kwaye zibola, ii-BFR nazo ziqala ukubola, faka indawo yokutshisa igesi yesigaba kunye nemveliso yokubola kwe-thermal, inqanda ukusabela kunye nokuthintela ukwanda komlilo.Ngelo xesha, igesi ekhutshiweyo igubungela umphezulu wezinto eziphathekayo ukuze ivimbe kwaye idibanise i-oksijeni yoxinaniso, kwaye ekugqibeleni iyancipha ukutshiswa kokutsha kuze kube yilapho iphelile.Ukongeza, ii-BFR zidla ngokusetyenziswa ngokudibeneyo ne-antimony oxide (ATO).I-ATO ngokwayo ayinayo i-flame retardancy, kodwa inokusebenza njenge-catalyst ukukhawulezisa ukubola kwe-bromine okanye i-chlorine.
Iiretardants zomlilo ze-phosphorus (OFRs)isebenza ngokubili ngokomzimba nangokwekhemikhali, ngobuchule obuphezulu kunye neengenelo zobutyhefu obuphantsi, ukuqina kunye nokusebenza kweendleko eziphezulu.Ukongeza, kunokuphucula ukusetyenzwa kwe-fluidity ye-alloy, ukubonelela ngomsebenzi weplastiki kunye nokusebenza okugqwesileyo.Ngeemfuno eziphezulu zokukhuselwa kwendalo, i-OPFR ithatha indawo ye-BFR ngokuthe ngcembe njengemveliso eqhelekileyo.
Nangona ukongezwa kwe-FR akukwazi ukwenza izinto ezichasene ngokupheleleyo nomlilo, kunokuphepha ngokufanelekileyo "i-flash burn" isenzeko, ukunciphisa ukwenzeka komlilo kwaye uphumelele ixesha elixabisekileyo lokubalekela abantu kwindawo yomlilo.Ukuqiniswa kweemfuno zelizwe zobuchwepheshe obunqande amalangatye kwenza ukuba ithemba lophuhliso lwe-FRs libe banzi.
Ixesha lokuposa: Nov-19-2021