Flame was applied for 5 minutes by the combustion test method according to the 45 ° C combustion test method and JIS L1091, and the back surface temperature, penetration, and after-flame time were measured. Evaluate performance based on mass reduction rate and unit price area. There was no penetration of the plasma-treated material on the surface, and it was possible to demonstrate flame retardancy due to the foaming phenomenon unique to sodium polyborate. The test lasted 5 minutes.

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