Synergistic Flame Retardancy of Aluminium Dipropylphosphinate and Melamine in Polyamide 6

Table 1

Effect of the weight ratios of ADPP to Me on its flame retardance in PA6.

𝑤 (ADPP) : 𝑤 (ME)	LOI/%	UL 94 class	Combustion phenomenon
100 : 0	33.2	FV-0	Difficult ignition, self-extinguishing, no drips
85 : 15	35.4	FV-0	Difficult ignition, self-extinguishing, no drips
75 : 25	36.3	FV-0	Difficult ignition, self-extinguishing, no drips
65 : 35	36.4	FV-0	Difficult ignition, self-extinguishing, no drips
55 : 45	36.5	FV-0	Difficult ignition, self-extinguishing, no drips
45 : 55	36.6	FV-0	Difficult ignition, self-extinguishing, no drips
35 : 65	35.2	FV-0	Difficult ignition, self-extinguishing, no drips
25 : 75	34.0	FV-0	Difficult ignition, self-extinguishing, no drips
15 : 85	31.1	FV-1	Gentle combustion, self-extinguishing, no drips
0 : 100	28.3	—	Sustained combustion, later severe, drips