CHARGEABLE SHEATH-CORE STRUCTURED FIBER, NON-WOVEN FABRIC OBTAINED FROM THE FIBER, COMPOSITE NON-WOVEN FABRIC, NON-WOVEN FABRIC PRODUCT, AND MANUFACTURING METHOD OF NON-WOVEN FABRIC PRODUCT

To provide a chargeable sheath-core structured fiber capable of satisfying heat resistance and charge retention, in the usage such as an onboard filter.SOLUTION: A chargeable sheath-core structured fiber characterized in that polypropylene resin is used as the main resin in the sheath and the core portion, and in the sheath portion, (a) anhydrous carboxylic acid modified polyolefin 3 to 20 mass%, and (b) at least one kind of an antioxidant selected from an antioxidant formed by combining a phenolic antioxidant and a phosphorus based antioxidant, or a sulfur system antioxidant 0.5 to 3.0 mass% are contained, and, on the outer peripheral surface of the sheath, (c) as a finishing agent, an oil solution containing 50 mass% or larger of polyoxyalkylene alkyl ether represented by the general formula (I) is attached by 0.1 to 1.0 mass% to a total amount of the sheath-core structured fiber. (In the formula, R1 shows a saturated or unsaturated aliphatic hydrocarbon group having 10 to 30 carbon atoms. R2 shows hydrogen atom or methyl group, k is an integer of 1 to 4.)SELECTED DRAWING: None 【課題】車載用フィルターなどの用途において、耐熱性及び帯電保持性を満足できる帯電性鞘芯構造繊維を提供する。【解決手段】鞘部及び芯部においてポリプロピレン系樹脂を主体樹脂とし、前記鞘部には（ａ）無水カルボン酸変性ポリオレフィン３〜２０質量％と、（ｂ）フェノール系酸化防止剤及びリン系酸化防止剤を組み合わせてなる酸化防止剤、又は硫黄系酸化防止剤からなる群から選択される少なくとも１種の酸化防止剤０．５〜３．０質量％とを、含有するとともに、鞘部の外周表面には、（ｃ）仕上げ油剤として一般式（Ｉ）で表されるポリオキシアルキレンアルキルエーテルを５０質量％以上含む油剤を前記鞘芯構造繊維の全質量に対して、０．１〜１．０質量％付着させてなることを特徴とする帯電性鞘芯構造繊維。（式中、Ｒ１は炭素数１０〜３０の飽和もしくは不飽和の脂肪族炭化水素基を示す。Ｒ２は水素原子又はメチル基を示し、ｋは１〜４の整数である。）【選択図】なし