Ekwandiseni ukwakheka kwezinsimbi, i-ammonium polyphosphate (APP) idlala indima ebalulekile ekwandiseni ukumelana nomlilo.
I-APP ivamise ukusetshenziswa njengesivimbeli ilangabi ekwandiseni ukwakheka kwezinsimbi. Uma ingaphansi kwamazinga okushisa aphezulu ngesikhathi somlilo, i-APP iba noguquko lwamakhemikhali oluyinkimbinkimbi. Ukushisa kubangela ukukhululwa kwe-phosphoric acid, esabela ngama-radicals mahhala akhiqizwa inqubo yokuvutha. Lokhu kusabela kwamakhemikhali kukhuthaza ukwakheka kwe-dense char layer. Lesi singqimba se-char sisebenza njengesithiyo sokuvikela, sikhawulela ngempumelelo ukudluliswa kokushisa nomoya-mpilo ezintweni ezingaphansi, ngaleyo ndlela kuvimbele ukubhebhetheka kwamalangabi.
Ukwengeza, i-APP isebenza njenge-intumescent flame retardant ekwandiseni ukwakheka kwezinsimbi. Uma zivezwe emlilweni, izithasiselo ze-intumescent, okuhlanganisa i-APP, ziba nenqubo yokuvuvukala, ukusha, nokwenza isendlalelo esivikelayo. Lolu ungqimba lunomthelela ekwehliseni ukudluliswa kokushisa nokukhululwa kwamagesi angashi, ngaleyo ndlela kubambezeleke ngempumelelo ukusabalala komlilo.
Ngaphezu kwalokho, ukuba khona kwe-APP ekukhuliseni ama-sealant kuthuthukisa ukumelana kwazo nomlilo kukonke futhi kuhlangabezana nezindinganiso eziqinile zokuphepha emlilweni. I-char eyakhiwe ngenxa yokusabela kwe-APP ivikela ngempumelelo izinto eziyisisekelo, inikeze isikhathi esengeziwe sokusabela okuphuthumayo kanye nokuphuma uma kwenzeka kuba nomlilo.
Ekuphetheni, ekwandiseni ukwakheka kwe-sealant, ukufakwa kwe-ammonium polyphosphate kuthuthukisa kakhulu ukumelana nomlilo ngokukhuthaza ukwakheka kwe-char layer evikelayo, ukunciphisa ukushisa nokudlulisa umoya-mpilo, futhi kunikeze umgoqo ophumelelayo ngokumelene nokusabalala kwamalangabi. Lokhu kunomthelela ekuphepheni komlilo okuphelele nokusebenza kokwandisa imikhiqizo yama-sealant ezinhlelweni ezihlukahlukene.
Isikhathi sokuthumela: Dec-22-2023
