Ekwandiseni iifomyula ze-sealant, i-ammonium polyphosphate (APP) idlala indima ebalulekileyo ekwandiseni ukumelana nomlilo.
I-APP isetyenziswa kakhulu njengesithinteli-langatye ekwandiseni iifomyula ze-sealant. Xa iphantsi kobushushu obuphezulu ngexesha lomlilo, i-APP itshintsha iikhemikhali ngendlela entsonkothileyo. Ubushushu bubangela ukukhululwa kwe-phosphoric acid, esabela kwii-free radicals eziveliswa yinkqubo yokutsha. Le mpendulo yeekhemikhali ikhuthaza ukwakheka komaleko we-char oxineneyo. Le komaleko we-char usebenza njengomqobo wokukhusela, uthintela ngempumelelo ukudluliselwa kobushushu kunye ne-oksijini kwizinto ezingaphantsi, ngaloo ndlela uthintela ukusasazeka kwamalangatye.
Ukongeza, i-APP isebenza njengesithinteli-langatye esingaphakathi kwe-intumescent ekwandiseni iifomyula zesitywina. Xa zichatshazelwa ngumlilo, izongezo ezingaphakathi kwe-intumescent, kuquka i-APP, zifumana inkqubo yokudumba, ukutsha, nokwenza umaleko okhuselayo wokugquma. Lo maleko unegalelo ekunciphiseni ukudluliselwa kobushushu kunye nokukhululwa kweegesi ezingatshiyo, ngaloo ndlela uthintela ukusasazeka komlilo ngempumelelo.
Ngaphezu koko, ukubakho kwe-APP kwizitywini ezikhulayo kwandisa ukumelana kwazo nomlilo kwaye kuyahlangabezana nemigangatho yokhuseleko lomlilo oluqinileyo. Umlilo owenziwe ngenxa yempendulo ye-APP ukhusela ngokufanelekileyo izinto ezingaphantsi, ubonelela ngexesha elongezelelweyo lokuphendula ngokukhawuleza kunye nokuphuma xa kukho umlilo.
Ukuqukumbela, ekwandiseni iifomyula ze-sealant, ukufakwa kwe-ammonium polyphosphate kuphucula kakhulu ukumelana nomlilo ngokukhuthaza ukwakheka komaleko we-char okhuselayo, ukunciphisa ubushushu kunye nokudluliselwa kweoksijini, kunye nokubonelela ngomqobo osebenzayo ngokuchasene nokusasazeka kwamalangatye. Oku kuncedisa kukhuseleko lomlilo ngokubanzi kunye nokusebenza kweemveliso ze-sealant ezikhulayo kwizicelo ezahlukeneyo.
Ixesha lokuthumela: Disemba-22-2023
