A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
WHOLLY AROMATIC POLYAMIDE FIBER
To provide a fiber for reinforcing a concrete composition, which has rust prevention, high strength, a high elastic modulus, and excellent sizeability.SOLUTION: In a wholly polyamide fiber, a shape of a cross section satisfies the following requirements a) and b): a) a shape of cross section in the fiber has 2 or more and 12 or less concave portions; and b) in the cross section, flatness, a degree of multi-lobe, and concavity respectively shown by the following formula (1)-(3) are satisfied: flatness (A/B)=1.5-3.0...(1); a degree of multi-lobe (C/B)=0.4-0.8...(2); and concavity (D/E)=0.2-4.5...(3), wherein: the maximum value in a length of a long side of the cross section is A; the maximum value in a length of a short side thereof is B; the length of the shortest line segment is C among two line segments by which the bottom surfaces of concave portions adjacent to B are connected; the length between contact points of tangent lines is D, the tangent lines being drawn respectively on 2 convex parts that are formed on both sides of the concave part; and the length of a perpendicular line drawn from the center of the tangent line, to the contact point of the concave part, is E.SELECTED DRAWING: Figure 1
【課題】防錆性、高強度、高弾性率、優れた集束性を有し、且つコンクリートとの混練時に切損が起こらないコンクリート組成物補強用繊維を提供する。【解決手段】横断面形状が下記ａ）、ｂ）の要件を同時に満たすことを特徴とする全芳香族ポリアミド繊維。ａ）繊維の横断面形状が、２個以上１２個以下の凹部を有する。ｂ）繊維横断面において、その長辺の長さの最大値をＡ、短辺の長さの最大値をＢ、Ｂに隣接する凹部の底面同士を結んだ２組の線分のうち、長さが短い方の線分の長さをＣ、凹部の両隣りに形成された２つの凸部に接線を引き、その接点間の長さをＤ、及び該接線の中心から降ろした垂線の、凹部との接点までの長さをＥとするとき、下記式（１）〜（３）で示される扁平度、異形度及び凹度の値を満足する。扁平度（Ａ／Ｂ）＝１．５〜３．０・・・（１）異形度（Ｃ／Ｂ）＝０．４〜０．８・・・（２）凹度（Ｄ／Ｅ）＝０．２〜４．５・・・（３）【選択図】図１
WHOLLY AROMATIC POLYAMIDE FIBER
To provide a fiber for reinforcing a concrete composition, which has rust prevention, high strength, a high elastic modulus, and excellent sizeability.SOLUTION: In a wholly polyamide fiber, a shape of a cross section satisfies the following requirements a) and b): a) a shape of cross section in the fiber has 2 or more and 12 or less concave portions; and b) in the cross section, flatness, a degree of multi-lobe, and concavity respectively shown by the following formula (1)-(3) are satisfied: flatness (A/B)=1.5-3.0...(1); a degree of multi-lobe (C/B)=0.4-0.8...(2); and concavity (D/E)=0.2-4.5...(3), wherein: the maximum value in a length of a long side of the cross section is A; the maximum value in a length of a short side thereof is B; the length of the shortest line segment is C among two line segments by which the bottom surfaces of concave portions adjacent to B are connected; the length between contact points of tangent lines is D, the tangent lines being drawn respectively on 2 convex parts that are formed on both sides of the concave part; and the length of a perpendicular line drawn from the center of the tangent line, to the contact point of the concave part, is E.SELECTED DRAWING: Figure 1
【課題】防錆性、高強度、高弾性率、優れた集束性を有し、且つコンクリートとの混練時に切損が起こらないコンクリート組成物補強用繊維を提供する。【解決手段】横断面形状が下記ａ）、ｂ）の要件を同時に満たすことを特徴とする全芳香族ポリアミド繊維。ａ）繊維の横断面形状が、２個以上１２個以下の凹部を有する。ｂ）繊維横断面において、その長辺の長さの最大値をＡ、短辺の長さの最大値をＢ、Ｂに隣接する凹部の底面同士を結んだ２組の線分のうち、長さが短い方の線分の長さをＣ、凹部の両隣りに形成された２つの凸部に接線を引き、その接点間の長さをＤ、及び該接線の中心から降ろした垂線の、凹部との接点までの長さをＥとするとき、下記式（１）〜（３）で示される扁平度、異形度及び凹度の値を満足する。扁平度（Ａ／Ｂ）＝１．５〜３．０・・・（１）異形度（Ｃ／Ｂ）＝０．４〜０．８・・・（２）凹度（Ｄ／Ｅ）＝０．２〜４．５・・・（３）【選択図】図１
WHOLLY AROMATIC POLYAMIDE FIBER
全芳香族ポリアミド繊維
NIIMI YUKI (author) / KOMIYA NAOYA (author)
2019-08-15
Patent
Electronic Resource
Japanese
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