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There are three combustibility types: flammable (combustible); flame retardant (difficult to burn); and nonflammable (does not burn).
Although there are many indices for evaluating flame retardance, we use the “UL-94 VTM method” and “oxygen index”.
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| ■ UL-94 (VTM method: thin material test) |
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This is a flame retardance test of plastic materials created by US-based Underwriters Laboratories, Inc.
The scale for flame retardance is as follows. Good: VTM-0 > VTM-1 > VTM-2 > failure: Poor. |
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| ■ Oxygen index |
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This indicates the minimum oxygen concentration (percent volume) to maintain combustion of materials specified by the ASTM D 2863 and JIS K 7201 standards. An oxygen index of 26 or higher is generally understood to be in the flame-retardant range. |
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| ■ Burn test |
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This is a video of a burn test of “TARDON NC-02AS” using a gas burner.
TARDON is highly flame resistant, and does not catch fire even when exposed to a gas burner. |
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