Ekwandiseni imixube ye-sealant, i-ammonium polyphosphate (APP) idlala indima ebalulekileyo ekwandiseni ukuxhathisa umlilo.
I-APP idla ngokusetyenziswa njengesithinteli somlilo ekwandiseni imixube yesitywina.Xa iphantsi kobushushu obuphezulu ngexesha lomlilo, i-APP ifumana ukuguqulwa kweekhemikhali eziyinkimbinkimbi.Ubushushu bubangela ukukhululwa kwe-asidi ye-phosphoric, ephendula kunye ne-radicals yamahhala eyenziwa yinkqubo yokutsha.Le mpendulo yeekhemikhali ikhuthaza ukubunjwa kwe-dense char layer.Olu luhlu lwe-char lusebenza njengesithintelo se-insulating, ngokufanelekileyo ukunciphisa ukuhanjiswa kobushushu kunye ne-oksijini kwizinto eziphantsi, ngaloo ndlela kuthintela ukusasazeka kwamadangatye.
Ukongeza, i-APP isebenza njenge-intumescent flame retardant ekwandiseni imixube yesitywina.Xa ibonakaliswe emlilweni, izongezo ze-intumescent, ezibandakanya i-APP, zihamba kwinkqubo yokuvuvukala, i-charring, kunye nokwenza i-insulating layer yokukhusela.Olu luhlu lunegalelo ekunciphiseni ukuhanjiswa kobushushu kunye nokukhululwa kweegesi ezingatshayo, ngaloo ndlela kubambezeleka ngokufanelekileyo ukusasazeka komlilo.
Ngaphaya koko, ubukho be-APP ekwandiseni izitywini kwandisa ukuxhathisa kwabo komlilo ngokubanzi kwaye ihlangabezana nemigangatho engqongqo yokhuseleko lomlilo.I-char eyenziwe ngenxa yokusabela kwe-APP ikhusela ngokufanelekileyo izinto ezisisiseko, inika ixesha elongezelelweyo lokuphendula ngokukhawuleza kunye nokukhutshwa kwimeko yomlilo.
Ekugqibeleni, ekwandiseni i-sealant formulations, ukufakwa kwe-ammonium polyphosphate kwandisa kakhulu ukumelana nomlilo ngokukhuthaza ukubunjwa kwe-char layer ekhuselayo, ukunciphisa ukushisa kunye nokuhanjiswa kwe-oksijeni, kunye nokubonelela ngomqobo osebenzayo malunga nokusasazeka kwamadangatye.Oku kunegalelo kukhuseleko lomlilo ngokubanzi kunye nokusebenza kokwandisa iimveliso ze-sealant kwizicelo ezahlukeneyo.
Ixesha lokuposa: Dec-22-2023
