Wood obtained by pressurized injection of fire retardant. Industrial standards include provisions for fire retardant for construction. Fire retardant agents are often used as mixtures since a single agent is unlikely to be effective. Mixed fire retardant agents consist of a mixture of phosphate compounds, phosphorus nitrogen compounds, phosphorus halogen compounds, boron compounds, antimony compounds, etc. Fire retardant effects are divided into flame retardant and dust retardant effects. These agents have a flame retardant effect by performing dilution, chemical bonding, and dehydration/carbonization actions through physical coating, insulation, heat absorption, and non-flammable gas generation. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
防火薬剤の加圧注入処理により得られる木材。工業規格には建築用防火薬剤の規定がある。防火薬剤は単一の薬剤では効果を示しにくく,混合薬剤として使われることが多い。混合防火薬剤はリン酸系化合物,リン窒素化合物,リンハロゲン化合物,ホウ素化合物,アンチモン化合物などの混合物からなる。防火効果は防炎効果と防塵効果に分かれる。これらの薬剤は,防炎効果にかかわるものとして,物理的被覆,断熱,吸熱,不燃性ガス発生などにより希釈作用,化学的結合作用,脱水炭化作用を行う。
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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