Flame retardant fabric supplier introduces how to judge […]
Flame retardant fabric supplier introduces how to judge the pros and cons of flame-retardant performance:
1. Judge the burning rate of the fabric. That is, the flame-retardant finished fabric is in contact with the flame for a certain period of time according to the prescribed method, and then the flame is removed, and the time for the fabric to continue to burn with and without flame, and the extent to which the fabric is damaged. The shorter the flame burning time and the flameless burning time and the lower the degree of damage, the better the flame retardant performance of the fabric; otherwise, the flame retardant performance of the fabric is poor.
2. Judging from the oxygen index: fabric combustion requires oxygen. The oxygen index is the expression of the oxygen required for fiber combustion. Therefore, the flame retardant performance of the fabric can be judged by measuring the oxygen index. The higher the oxygen index, the maintenance required for combustion. The higher the oxygen concentration, the more difficult it is to burn: this index can be expressed as the minimum volume percentage of oxygen required for the sample to maintain candle-like combustion in a mixed gas of nitrogen and oxygen. An oxygen index of less than 20% is a combustible fiber; an oxygen index of 20 to 26% is a combustible fiber; an oxygen index of 26 to 34% is a flame-retardant fiber; an oxygen index of more than 35% is a non-combustible fiber.