PROBLEM TO BE SOLVED: To provide a polyolefin-based spun-bonded nonwoven fabric, in which crystal orientation and cloth toughness is maintained by evenly dispersing carbon dioxide generation suppressor particles in polyolefin-based resin fibers and optimizing spinning condition and carbon dioxide generation during combustion is suppressed.SOLUTION: A polyolefin-based spun-bonded nonwoven fabric is made from polyolefin-based resin fibers. In the nonwoven fabric, carbon dioxide generation suppressor particle with 150 nm to 250 nm of particle diameter is dispersed and contained at 0.03 to 0.30 weight % in the polyolefin-based resin. Sanitary material including the nonwoven fabric is also provided in this invention.SELECTED DRAWING: None【課題】二酸化炭素発生量抑制剤の粒子をポリオレフィン系樹脂の繊維中に均一に分散し、かつ、紡糸条件を最適化することにより結晶配向性・布タフネスを維持し、さらに燃焼時二酸化炭素発生量を抑制したポリオレフィン系スパンボンド不織布の提供。【解決手段】ポリオレフィン系樹脂の繊維から構成されるポリオレフィン系スパンボンド不織布であって、該ポリオレフィン系樹脂に、粒子径１５０ｎｍ～２５０ｎｍの二酸化炭素発生量抑制剤の粒子が分散され、０．０３～０．３０重量％で含有されていることを特徴とする前記不織布、及び該不織布を含む衛生材料。【選択図】なし
