COMPOSITE STRUCTURE

To provide a novel improved polymer unwoven fabric material.SOLUTION: There is provided a composite structure containing at least 2 unwoven polymer layers adhered to each other, in which at least one unwoven polymer layer contains inorganic particulate filler in amount of 40 mass% or less of the unwoven fabric layer, each unwoven fabric polymer layer contains a polymer resin, the polymer resin contains polypropylene, and which is coated with the inorganic particulate filler, and the structure having following physical properties and mechanical properties: (i) hydrostatic head in a range of 400 mm to 1000 mm: (ii) air permeation rate in a range of 400 l/ms to 900 l/ms; (iii) MD tensile strength in a range of 95.0 N/5 cm to 120.0 N/5 cm; (iv) CD tensile strength in a range of 40.0 N/5 cm to 60.0 N/5 cm; (v) MD elongation in a range of 60% to 120%; and (vi) CD elongation in a range of 60% to 120%.SELECTED DRAWING: None 【課題】新規の改善されたポリマー不織布材料の提供。【解決手段】互いに接着された少なくとも２つの不織布ポリマー層を含み、少なくとも１つの不織布ポリマー層が当該不織布層の４０質量％以下の量で無機粒子状充填剤を含む複合構造体であって、各不織布ポリマー層がポリマー樹脂を含み、前記ポリマー樹脂がポリプロピレンを含み、前記無機粒子状充填剤が被覆されており、以下の物理特性および機械特性：（ｉ）４００ ｍｍ〜１０００ ｍｍの範囲の静水頭；（ｉｉ）４００ ｌ／ｍ2ｓ〜９００ ｌ／ｍ2ｓの範囲の空気透過率；（ｉｉｉ）９５．０ Ｎ／５ｃｍ〜１２０．０ Ｎ／５ｃｍの範囲のＭＤ引張強度；（ｉｖ）４０．０ Ｎ／５ｃｍ〜６０．０ Ｎ／５ｃｍの範囲のＣＤ引張強度；（ｖ）６０％〜１２０％の範囲のＭＤ伸長；および（ｖｉ）６０％〜１２０％の範囲のＣＤ伸長のうちの１つ以上を有する、複合構造体。【選択図】なし