The main criteria for evaluating the flammability of Oxford fabrics
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1. It is the ignitability, which is the high fire point. The low one indicates the difficulty of the fabric catching fire.
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2. It is the burning performance of the fabric, that is, the flame retardancy.
On the other hand, it depends on the burning performance of the fabric: one is to judge based on the burning rate of the fabric. It means that the fabric after flame retardant finishing 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 burning with fire and the time for burning without flame is measured, as well as the degree of damage to the fabric. 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 fabric has poor flame retardant performance. [600D Oxford cloth]
The other is to judge by the oxygen index: fabric burning requires oxygen, and the oxygen index is the fiber burning The expression of the oxygen required, so the flame retardant performance of the fabric can be determined by measuring the oxygen index. The higher the oxygen index, the higher the oxygen concentration required to maintain combustion, which means the more difficult it is to burn: this index can be used with samples mixed with nitrogen and oxygen. The minimum volume percentage of oxygen required to maintain candle-like combustion in a gas is expressed. If the oxygen index is less than 20%, it is a flammable fiber; if the oxygen index is between 20 and 26%, it is a flammable fiber; if the oxygen index is between 26 and 34%, it is a flame-retardant fiber; if the oxygen index is above 35%, it is a non-flammable fiber.
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