Flammable fibers include vegetable fibers such as cotton and rayon, as well as polypropylene, acrylic, and polyester, which burn up in a short time when ignited. In contrast, flame-retardant fibers, which are difficult to burn, burn while exposed to flame, but have the property of naturally extinguishing when removed from the flame. Wool has the property of naturally extinguishing, so it is classified as semi-flame-retardant. Vinyl chloride, polychlor (a copolymer of vinyl chloride and vinyl alcohol), and modacrylic, which have chlorine in their molecules, are flame-retardant fibers that burn in a semi-molten state. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
燃えやすい繊維としては綿やレーヨンのような植物繊維,およびポリプロピレン,アクリル,ポリエステルがあり,これらは着火すると短時間で燃えつきる。これに対して,燃えにくい繊維である難燃繊維は炎が当たっている間は燃えるが,炎から離すと自然に消火する性質をもっている。羊毛は自然に消火する性質があるので,準難燃性に分類される。塩素を分子内に有する塩化ビニル,ポリクラール(塩化ビニルとビニルアルコールの共重合体),およびモダクリルは半溶融状態で燃焼する難燃繊維である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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