JP6048820B2 - Reinforcing fiber sheet - Google Patents

Reinforcing fiber sheet Download PDF

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JP6048820B2
JP6048820B2 JP2013003523A JP2013003523A JP6048820B2 JP 6048820 B2 JP6048820 B2 JP 6048820B2 JP 2013003523 A JP2013003523 A JP 2013003523A JP 2013003523 A JP2013003523 A JP 2013003523A JP 6048820 B2 JP6048820 B2 JP 6048820B2
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reinforcing fiber
fiber sheet
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weft
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JP2014088652A (en
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弘 榎本
弘 榎本
野村 幸弘
幸弘 野村
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Toyobo Co Ltd
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Description

本発明は補強用繊維シートに関し、さらに詳細には高架の鉄道や高速道路などの橋脚や梁などの土木コンクリート構造物、建物の柱、および壁などを補強する補強用繊維シートに関するものである。   The present invention relates to a reinforcing fiber sheet, and more particularly to a reinforcing fiber sheet that reinforces civil engineering structures such as bridge piers and beams such as elevated railways and highways, building columns, and walls.

コンクリート製の建築構造物が多数存在するが、地震による破壊の耐久性の改善などの問題がある。コンクリート構造物耐久性改善のための補強、補修方法は、対象となるコンクリート製の柱を鉄板で覆う方法と補強用繊維シートをコンクリート面に貼り付け、もしくは巻きつける方法などがある。しかし鉄板で覆う方法は重い鉄板を扱うため重機や頑丈な足場が必要である。   There are many concrete building structures, but there are problems such as improving the durability of destruction caused by earthquakes. Reinforcing and repairing methods for improving the durability of concrete structures include a method of covering a target concrete pillar with an iron plate and a method of attaching or winding a reinforcing fiber sheet on a concrete surface. However, the method of covering with a steel plate requires heavy machinery and a sturdy scaffold to handle heavy iron plates.

補強用繊維シートを巻きつける方法は重量物を扱う重機の必要がなく施工が容易であり、狭いところでの施工が容易で、また工期が短縮できるなどの利点がある。   The method of winding the reinforcing fiber sheet is advantageous in that it does not require heavy machinery for handling heavy objects, is easy to construct, can be easily constructed in narrow spaces, and can shorten the construction period.

繊維シートによる補強方法は、引張強力が高い補強用繊維シートをアクリル樹脂、またはエポキシ樹脂によってコンクリート表面に接着させることにより行われる。その際、アクリル樹脂、またはエポキシ樹脂は繊維シートをコンクリートに接着させるだけでなく繊維シートに含浸し、シートの強度を向上させ、さらに繊維シートの強度をコンクリートに伝える媒介としての役割を果たす。   The reinforcing method using a fiber sheet is performed by adhering a reinforcing fiber sheet having a high tensile strength to a concrete surface with an acrylic resin or an epoxy resin. At that time, the acrylic resin or the epoxy resin not only adheres the fiber sheet to the concrete but also impregnates the fiber sheet to improve the strength of the sheet and further serves as a medium for transmitting the strength of the fiber sheet to the concrete.

補強用繊維シートにおいて耐力が高いシートが望まれるが、高耐力にするには単位幅当たりの繊維量、すなわちトータル繊度を多くしなければならない。その手段として繊維集合体としてのヤーンの太さを太くするか、単位幅当たりのヤーンの本数を増加する方法がとられるが、製織性、軽量性、樹脂含浸性を阻害する要因となっている。   A sheet having a high yield strength is desired among the reinforcing fiber sheets, but in order to achieve a high yield strength, the amount of fibers per unit width, that is, the total fineness must be increased. As the means, a method of increasing the thickness of the yarn as the fiber assembly or increasing the number of yarns per unit width is taken, but this is a factor that hinders weaving property, lightness, and resin impregnation property. .

特許文献1には、補強用繊維の繊度を高くして布状に製織し、これをコンクリート構造物に巻きつけて、含浸させた樹脂を固化する方法が提案されている。上記の公報公開には補強用繊維シートは平織りで製織されたものが例示されているが、経緯糸の本数の比率についてはなんら述べられていない。しかしながら、一般的に平織りは経、緯糸それぞれが互いに相手を高度に拘束する織物組織であるため、樹脂含性が悪くなると同時に、クリンプ率が高くなるため、構成する繊維が有している強力からみた織物の強力、すなわち織物の強力利用率が低くなるため好ましくない。特に補強用繊維の繊度を高くした場合この傾向が顕著になる。   Patent Document 1 proposes a method in which the fineness of the reinforcing fiber is increased to be woven into a cloth shape and wound around a concrete structure to solidify the impregnated resin. In the above publication, the reinforcing fiber sheet is exemplified by a plain weave, but nothing is stated about the ratio of the number of warp and weft yarns. However, in general, a plain weave is a woven fabric structure in which warp and weft are highly constrained to each other, so that the resin content deteriorates and at the same time the crimp rate increases, so that the constituent fibers have high strength. This is not preferable because the strength of the woven fabric, that is, the strength utilization rate of the woven fabric is lowered. In particular, this tendency becomes remarkable when the fineness of the reinforcing fiber is increased.

特許文献2には、織物の経糸カバーファクター、緯糸カバーファクターを規定しており、樹脂含浸性と織物の柔軟性を持たせた織物が提案されている。しかしながら、このカバーファクターの範囲では織物目付けが大きくなり織物が重くなるため運搬時に負担がかかり、施工時の作業性を阻害する。また、緯糸密度が高く模紗織りのため経糸方向のクリンプ率が高くなり、織物の強力利用率が低くなるといった問題を有していた。   Patent Document 2 defines a warp cover factor and a weft cover factor of a woven fabric, and proposes a woven fabric having resin impregnation properties and woven fabric flexibility. However, in the range of this cover factor, the fabric weight becomes large and the fabric becomes heavy, so that a burden is imposed during transportation, which impairs workability during construction. Further, since the weft density is high and the pattern weaving, there is a problem that the crimp rate in the warp direction is high and the strength utilization rate of the fabric is low.

特開平6−288099号公報Japanese Patent Laid-Open No. 6-288099 特開2000−34639号公報JP 2000-34639 A

本発明は補強耐力が高く、軽量であるとともに樹脂含浸性が良好であり、施工時の作業性に優れた補強用繊維シートを提供することを目的とする。   An object of the present invention is to provide a reinforcing fiber sheet having high reinforcement strength, light weight, good resin impregnation, and excellent workability during construction.

本発明は、下記に示す補強用繊維シートを用いることで上記問題を解決することができる。
1.経糸に補強用繊維を用い、緯糸に前記経糸より細い繊度の糸を用いて製織された補強用繊維シートであって、
x=(経糸カバーファクター)=(経糸繊度(dtex)/繊維の密度(g/cm))^1/2×(経糸密度(本/cm))
y=(緯糸カバーファクター)=(緯糸繊度(dtex)/繊維の密度(g/cm)))^1/2×(緯糸密度(本/cm))
としたとき、xとyとの関係が下記の(1)および(2)式を満足することを特徴とする補強用繊維シート。
600≦x≦1000 ・・・(1)
-0.025x+37≦y≦-0.025x+53・・(2)
2.織物10mm幅における荷重(N/10mm)/織物目付け(g/m)が20以上であることを特徴とする上記1に記載の補強用繊維シート。
3.補強用繊維の原糸強力に対する織物の強力利用率が75%以上であることを特徴とする上記1、2いずれかに記載の補強用繊維シート。
4.補強用繊維が引張強度25cN/dtex以上のものであることを特徴とする上記1〜3のいずれか1に記載の補強用繊維シート。
5.前記補強用繊維がポリエチレン繊維であることを特徴とする上記1〜4のいずれか1に記載の補強繊維シート。
6.補強用繊維シートの織組織が、杉綾織であることを特徴とする、上記1〜5のいずれか1に記載の補強用繊維シート。
7.前記請求項1における(1)式が600≦x≦750であることを特徴とする、上記1〜6のいずれかに記載の補強用繊維シート。
The present invention can solve the above problems by using the reinforcing fiber sheet shown below.
1. A reinforcing fiber sheet woven using a reinforcing fiber for the warp, and a weft having a fineness finer than the warp,
x = (warp cover factor) = (warp fineness (dtex) / fiber density (g / cm 3 )) ^ 1/2 × (warp density (lines / cm))
y = (weft cover factor) = (weft fineness (dtex) / fiber density (g / cm 3 ))) ^ 1/2 × (weft density (lines / cm))
The reinforcing fiber sheet is characterized in that the relationship between x and y satisfies the following formulas (1) and (2).
600 ≦ x ≦ 1000 (1)
-0.025x + 37≤y≤-0.025x + 53 (2)
2. 2. The reinforcing fiber sheet according to 1 above, wherein a load (N / 10 mm) / weave basis weight (g / m 2 ) at a width of 10 mm is 20 or more.
3. 3. The reinforcing fiber sheet according to any one of the above items 1 and 2, wherein the strength utilization ratio of the woven fabric with respect to the raw yarn strength of the reinforcing fiber is 75% or more.
4). 4. The reinforcing fiber sheet according to any one of 1 to 3 above, wherein the reinforcing fiber has a tensile strength of 25 cN / dtex or more.
5. 5. The reinforcing fiber sheet according to any one of 1 to 4, wherein the reinforcing fiber is a polyethylene fiber.
6). 6. The reinforcing fiber sheet according to any one of 1 to 5 above, wherein the woven structure of the reinforcing fiber sheet is a cedar weave.
7). The reinforcing fiber sheet according to any one of 1 to 6 above, wherein the formula (1) in claim 1 satisfies 600 ≦ x ≦ 750.

本発明の補強用繊維シートは高耐力であっても経糸カバーファクターと緯糸カバーファクターの適切な配分により、樹脂含浸性が良く、軽量なコンクリート補強用繊維シートである。それ故、高架の鉄道や高速道路などの橋脚や梁などの土木コンクリート構造物、建物の柱、および壁などの補強用繊維シートとして、補強耐力が高く、軽量かつ施工時の作業性に優れた、利用価値の極めて高いものである。   The reinforcing fiber sheet of the present invention is a lightweight concrete reinforcing fiber sheet that has good resin impregnation properties and is lightweight by appropriate distribution of the warp cover factor and the weft cover factor even if it has high yield strength. Therefore, as a reinforcing fiber sheet for civil engineering concrete structures such as bridge piers and beams such as elevated railways and highways, building columns, and walls, it has high reinforcement strength, light weight, and excellent workability during construction. It is extremely useful.

本発明の特許請求の範囲における経糸と緯糸のカバーファクターの関係を示す図である。It is a figure which shows the relationship between the cover factor of the warp and the weft in the claim of this invention. 本発明で実施の杉綾織りを示す説明図である。It is explanatory drawing which shows the cypress weave implemented by this invention.

コンクリート柱表面に補強用繊維シートを貼り付ける手順としては、必要に応じプライマー処理されたコンクリート表面に、下塗りとしてアクリル樹脂またはエポキシ樹脂を塗布した後、あらかじめ必要とする長さ(周長+重ね継ぎ手長さ)に切断した補強用繊維シートを経糸の方向が周長方向になるように貼り付ける方法が用いられる。下塗り樹脂が硬化する前に直ちに補強用繊維シートを貼り付け、ローラーなどを用いて樹脂を十分に繊維シートに含浸させる。補強用繊維シートの幅は10cmから50cmのものが一般に用いられる。   The procedure for attaching the reinforcing fiber sheet to the concrete column surface is to apply the acrylic resin or epoxy resin as a primer to the concrete surface that has been primed as necessary, and then the required length (peripheral length + lap joint) A method is used in which the reinforcing fiber sheet cut to length) is attached so that the warp direction is the circumferential direction. Immediately before the undercoating resin is cured, the reinforcing fiber sheet is applied, and the fiber sheet is sufficiently impregnated with a roller or the like. A reinforcing fiber sheet having a width of 10 cm to 50 cm is generally used.

下塗り樹脂が十分に含浸させた後、同じ樹脂を用いて上塗りを行う。補強用繊維シート全面に樹脂を均一に塗布した後、樹脂が完全に硬化するまで養生しておく。補強の程度によっては補強用繊維シートを多層重ねて貼り付ける。最上層のシート貼り付けが終了し、表面の樹脂を完全に硬化させる。   After the undercoat resin is sufficiently impregnated, the same resin is used for overcoating. After the resin is uniformly applied to the entire surface of the reinforcing fiber sheet, it is cured until the resin is completely cured. Depending on the degree of reinforcement, multiple reinforcing fiber sheets are laminated and pasted. When the uppermost sheet is pasted, the resin on the surface is completely cured.

本発明の補強用繊維シートはシートの長さ方向に平行に配置される経糸に25cN/dtex以上の補強用繊維を配置し、シートの幅方向に平行に配置される緯糸には前記経糸より細い繊度の糸を用いて製織された織物である。   In the reinforcing fiber sheet of the present invention, reinforcing fibers of 25 cN / dtex or more are arranged on the warp arranged in parallel to the length direction of the sheet, and the weft arranged in parallel to the width direction of the sheet is thinner than the warp It is a woven fabric woven using fine yarn.

経糸方向に補強効果を発揮させるために、補強繊維は大部分経糸として配置される。緯糸は経糸をシート状に保持するための役割をする。補強用繊維シートに必要な樹脂含浸性を持たせるために、経糸と緯糸のカバーファクターの範囲を以下の通りに定める。その範囲は、
x=(経糸カバーファクター)=(経糸繊度(dtex)/繊維の密度(g/cm))^1/2×(経糸密度(本/cm))
y=(緯糸カバーファクター)=(緯糸繊度(dtex)/繊維の密度(g/cm))^1/2×(緯糸密度(本/cm))としたとき、
xとyとの関係が以下の通りである。
600≦x≦1000 ・・・(1)
-0.025x+37≦y≦-0.025x+53 ・・・(2)
In order to exert a reinforcing effect in the warp direction, the reinforcing fibers are mostly arranged as warps. The weft serves to hold the warp in a sheet form. In order to give the reinforcing fiber sheet the necessary resin impregnation property, the range of the cover factor of warp and weft is determined as follows. The range is
x = (warp cover factor) = (warp fineness (dtex) / fiber density (g / cm 3 )) ^ 1/2 × (warp density (lines / cm))
When y = (weft cover factor) = (weft fineness (dtex) / fiber density (g / cm 3 )) ^ 1/2 × (weft density (lines / cm)),
The relationship between x and y is as follows.
600 ≦ x ≦ 1000 (1)
-0.025x + 37≤y≤-0.025x + 53 (2)

経糸のカバーファクター(x)は600≦x≦1000であり、600≦x≦850が好ましく、600≦x≦750がより好ましい。x<600の場合は十分な引張強力を得ることが難しく、x>1000の場合は、製織が難しい。   The cover factor (x) of the warp is 600 ≦ x ≦ 1000, preferably 600 ≦ x ≦ 850, and more preferably 600 ≦ x ≦ 750. When x <600, it is difficult to obtain sufficient tensile strength, and when x> 1000, weaving is difficult.

緯糸のカバーファクター(y)は-0.025x+37≦y≦-0.025x+53であり、y<-0.025x+37の場合は緯糸の経糸に対する拘束力が不足する。
-0.025x+53>yの場合は樹脂含浸性が低下する。
The cover factor (y) of the weft is −0.025x + 37 ≦ y ≦ −0.025x + 53. When y <−0.025x + 37, the binding force of the weft on the warp is insufficient.
In the case of -0.025x + 53> y, the resin impregnation property decreases.

本発明の補強用繊維シートにおいて織物1cm幅における荷重(N)/織物目付け(g/m)が20以上であることが好ましい。22以上がより好ましく24以上がさらに好ましい。この値は、補強用繊維シートが必要な強力が、どれだけの繊維量により達成されているかを示す指標である。この値が大きい方が、少ない糸量、および/または軽い糸で構成されていることを示しており、作業性が良くなることを示している。 In the reinforcing fiber sheet of the present invention, the load (N) / woven fabric basis weight (g / m 2 ) in a 1 cm width of the fabric is preferably 20 or more. 22 or more is more preferable, and 24 or more is more preferable. This value is an index showing how much fiber the reinforcing strength required for the reinforcing fiber sheet is achieved. A larger value indicates that the yarn is composed of a smaller yarn amount and / or a lighter yarn, and the workability is improved.

補強用繊維の原糸強力に対する織物の強力利用率が75%以上であることが好ましい。それより強力利用率が低ければ、必要耐力を得るためにより多くの経糸本数が必要となるため、繊維シートが重く、かつ製織が難しくなりまた樹脂含浸性も低下する。平織、模紗織りでは経糸方向のクリンプ率が高くなり強力利用率が低くなるため、高い強力利用率を得るには平織物、模紗織物と比べて低クリンプ率となる織組織である杉綾織りが好ましい。   It is preferable that the strength utilization rate of the woven fabric with respect to the raw yarn strength of the reinforcing fiber is 75% or more. If the strength utilization rate is lower than that, a larger number of warps are required to obtain the required yield strength, so that the fiber sheet is heavy and weaving becomes difficult, and the resin impregnation property is also lowered. In plain weave and imitation weave, the crimp rate in the warp direction is higher and the strength utilization rate is lower. Is preferred.

本発明の補強用繊維の原糸強度は20cN/dtex以上であることが好ましい。20cN/dtexより小さければ補強用繊維シートとして十分な耐力が得られにくい。好ましくは25cN/dtex以上、より好ましくは30cN/dtex以上である。強度は高い方が好ましいが、繊維強度の限界が存在するため、60cN/dtex以下である。   The yarn strength of the reinforcing fiber of the present invention is preferably 20 cN / dtex or more. If it is smaller than 20 cN / dtex, it is difficult to obtain sufficient yield strength as a reinforcing fiber sheet. Preferably it is 25 cN / dtex or more, More preferably, it is 30 cN / dtex or more. Higher strength is preferable, but is 60 cN / dtex or less because of the limit of fiber strength.

本発明に用いられる補強用繊維の繊度は1000dtex以上が好ましい。繊度は、使用する補強用繊維の耐力に応じて設計すればよいが、可能な限り強度並びに強度保持率が高い繊維を用いることで、少ない繊維で必要な耐力を得ることが出来るため好ましい。   The fineness of the reinforcing fiber used in the present invention is preferably 1000 dtex or more. The fineness may be designed according to the proof stress of the reinforcing fiber to be used, but it is preferable to use a fiber having as high a strength and strength retention as possible because a necessary proof strength can be obtained with a small number of fibers.

補強用繊維を構成する単糸の繊度は0.5dtex以上が好ましい。単糸繊度が0.5dtexより小さいと、製職時に毛羽立ちやすくなる。好ましくは1.0dtex以上である。   The fineness of the single yarn constituting the reinforcing fiber is preferably 0.5 dtex or more. When the single yarn fineness is less than 0.5 dtex, it becomes easy to fluff during the production process. Preferably it is 1.0 dtex or more.

本発明の経糸に用いられる補強用繊維は高強度繊維が好ましく、炭素繊維、ガラス繊維、アラミド繊維、PBO繊維、全芳香族ポリエステル繊維、ポリエチレン繊維などを用いることができる。その中でも、しなやかさ、軽量性、摩擦などの繊維破損がおきにくいポリエチレン繊維が好ましく、高強度の高分子量ポリエチレン繊維がより好ましい。   The reinforcing fiber used in the warp of the present invention is preferably a high-strength fiber, and carbon fiber, glass fiber, aramid fiber, PBO fiber, wholly aromatic polyester fiber, polyethylene fiber, or the like can be used. Among them, polyethylene fibers that are less susceptible to fiber breakage such as flexibility, lightness, and friction are preferable, and high-strength high molecular weight polyethylene fibers are more preferable.

緯糸は経糸に用いられる補強用繊維と同一または異なっていてもよく、ポリエステル繊維、ナイロン繊維などの高強度繊維以外の繊維でもよい。好ましくは、特に湿度による寸法変化の少ないポリエステル繊維である。   The weft may be the same as or different from the reinforcing fiber used for the warp, and may be a fiber other than a high-strength fiber such as a polyester fiber or a nylon fiber. Particularly preferred is a polyester fiber with a small dimensional change due to humidity.

また、本発明の補強用繊維シートは織り組織は綾織、朱子織などが適応され、特に制限はないが杉綾織組織で製職されたものが好ましい。杉綾織組織の例としては、例えば図2に示すようなものである。   In the reinforcing fiber sheet of the present invention, a twill weave, satin weave, or the like is applied as the weave structure, and although it is not particularly limited, a sheet made with a cedar weave structure is preferable. An example of the cedar twill texture is as shown in FIG. 2, for example.

以下実施例を用いて説明を行う。本願発明に用いた測定方法は次の通りである。
[測定方法]
(1) クリンプ率:JISL1096 B法に従って評価した。織物の経方向に3箇所で200mmの距離に印を付与し、この印内の経糸を解き初荷重(0.1g/dtex)の下で真直ぐに張った長さ(mm)を測定し、次式によってクリンプ率(%)を求める。1箇所の測定本数は経糸5本とし、経糸3箇所の平均値を算出した。
Cw=(L−200/200)×100
ここでCw:クリンプ率(%)
L:真直ぐに張った長さ(mm)
Hereinafter, description will be made with reference to examples. The measurement method used in the present invention is as follows.
[Measuring method]
(1) Crimp rate: Evaluated according to JIS L1096 B method. Marks are placed at a distance of 200 mm at three locations in the warp direction of the fabric, and the warp yarns in the marks are unwound and the length (mm) stretched straight under the initial load (0.1 g / dtex) is measured. The crimp rate (%) is obtained by the formula. The number of measurement at one location was 5 warps, and the average value at 3 locations of warps was calculated.
Cw = (L−200 / 200) × 100
Where Cw: Crimp rate (%)
L: Length stretched straight (mm)

(2)荷重(N/10mm):JISL1096A法に従って評価した。INTESCO (model 2050)の引張試験機を用いて、引張速度200 mm/min、試験幅10mmとなる経糸本数(本)で測定し、10mm幅あたりの強力(N/10mm)を測定した。なお、経糸方向を測定方向とした。   (2) Load (N / 10 mm): Evaluated according to JIS L1096A method. Using a tensile tester of INTERSCO (model 2050), the tensile speed was 200 mm / min, and the number of warps was 10 mm, and the tenacity per 10 mm width (N / 10 mm) was measured. The warp direction was taken as the measurement direction.

(3)断面積(mm)/10mm:繊度(dtex)を原糸比重(g/cm)で除した値に試験幅10mmに必要な経糸本数を乗じた値を断面積(mm)/10mmとした。 (3) cross-sectional area (mm 2) / 10mm: fineness (dtex) of the yarn specific gravity (g / cm 3) obtained by dividing the value in the cross-sectional area of the value obtained by multiplying the number of warps required to test width 10mm in (mm 2) / 10 mm.

(4)強度(N/mm):荷重(N/10mm)を断面積(mm/10mm)で除した値を強度(N/mm)とした。この強度は2300N/mm以上が好ましく、より好ましくは2400以上である。 (4) Strength (N / mm 2): and a load (N / 10 mm) The value obtained by dividing the strength by the cross-sectional area (mm 2 / 10mm) (N / mm 2). This strength is preferably 2300 N / mm or more, more preferably 2400 or more.

(5)強力利用率(%):原糸強度(cN/dtex)に繊度(dtex)、ならびに10mmあたりの経糸本数を乗じた値を計算強力(N/10mm)とした。強力利用率(%)は次式にて算出した。
強力利用率(%)=(荷重(N/10mm)/計算強力(N/10mm))×100
(5) Strength utilization rate (%): The value obtained by multiplying the yarn strength (cN / dtex) by the fineness (dtex) and the number of warps per 10 mm was taken as the calculated strength (N / 10 mm). The strong utilization rate (%) was calculated by the following formula.
Power utilization rate (%) = (Load (N / 10 mm) / Calculated power (N / 10 mm)) × 100

(6)目付け(g/m):織物20cm×20cmの重量(g)を測定し、その重量(g)に25を乗じた値を目付け(g/m)とした。 (6) Weight per unit area (g / m 2 ): A weight (g) of a fabric 20 cm × 20 cm was measured, and a value obtained by multiplying the weight (g) by 25 was defined as a basis weight (g / m 2 ).

(7)荷重(N/10mm)/目付け(g/m):荷重(N/10mm)を目付け(g/m)で乗じた値とした。 (7) Load (N / 10 mm) / Weight (g / m 2 ): A value obtained by multiplying the load (N / 10 mm) by the weight (g / m 2 ).

(実施例1)
経糸に東洋紡製の高分子量ポリエチレン繊維「ダイニーマ」(登録商標)を用い、緯糸に東レ(株)製のポリエステル繊維を用いて、表1記載の条件で幅30cmの補強用繊維シートを製織した。
Example 1
A high-molecular-weight polyethylene fiber “Dyneema” (registered trademark) manufactured by Toyobo was used as the warp, and a polyester fiber manufactured by Toray Industries, Inc. was used as the weft. A reinforcing fiber sheet having a width of 30 cm was woven under the conditions shown in Table 1.

実施例1は織物シートの荷重(N/10mm)/目付け(g/m)がそれぞれ24.9であり、強力利用率(%)も78%と補強繊維シートとして有用なものであった。 In Example 1, the load (N / 10 mm) / weight per unit area (g / m 2 ) of the woven fabric sheet was 24.9, respectively, and the strong utilization rate (%) was 78%, which was useful as a reinforcing fiber sheet.

(実施例2〜5)
経糸に東洋紡製の高分子量ポリエチレン繊維「ダイニーマ」(登録商標)を用い、緯糸に東レ(株)のポリエステル繊維を用いて、表1記載の条件で幅30cmの補強用繊維シートを製織した。
(Examples 2 to 5)
A high-molecular-weight polyethylene fiber “Dyneema” (registered trademark) manufactured by Toyobo was used as the warp, and a polyester fiber manufactured by Toray Industries, Inc. was used as the weft. A reinforcing fiber sheet having a width of 30 cm was woven under the conditions shown in Table 1.

実施例2〜5の織物シートの荷重(N/10mm)/目付け(g/m)、強力利用率がそれぞれ20、75%を超え補強用繊維シートとして有用なものであった。 The load (N / 10 mm) / weight per unit area (g / m 2 ) and the strength utilization rate of the woven fabric sheets of Examples 2 to 5 exceeded 20 and 75%, respectively, and were useful as reinforcing fiber sheets.

(比較例1)
アラミド繊維である、7920dtex、引張強度22cN/dtexの糸を経糸に用い、緯糸に東レ(株)のポリエステル繊維を用いて、表1記載の条件で幅30cmの補強用繊維シートを製織した。
(Comparative Example 1)
A reinforcing fiber sheet having a width of 30 cm was woven under the conditions described in Table 1, using aramid fibers of 7920 dtex and a tensile strength of 22 cN / dtex as warp yarns and polyester fibers of Toray Industries, Ltd. as weft yarns.

比較例1は織物シートの荷重(N/10mm)/目付け(g/m)が16.6、強力利用率(%)も69.8%と低い値であった。比較例1は、糸の強度が低く、また織物を構成する経緯の糸の繊度、並びに織組織が適切でないため、必要な耐力を得るために多くの糸量を必要としている。このため、補強用繊維シートとして好ましくないものであった。 In Comparative Example 1, the load (N / 10 mm) / weight per unit area (g / m 2 ) of the woven fabric sheet was 16.6, and the strong utilization rate (%) was also low, 69.8%. In Comparative Example 1, since the strength of the yarn is low and the fineness of the weft constituting the woven fabric and the woven structure are not appropriate, a large amount of yarn is required to obtain the required yield strength. For this reason, it was not preferable as a reinforcing fiber sheet.

(比較例2)
ポリアリレート繊維である、6480dtex、引張強度22.9 cN/dtexの糸を経糸に用い、緯糸に東レ(株)のポリエステル繊維を用いて、表1記載の条件で幅30cmの補強用繊維シートを製織した。
(Comparative Example 2)
A fiber sheet for reinforcement having a width of 30 cm is used under the conditions described in Table 1, using a polyarylate fiber of 6480 dtex and a tensile strength of 22.9 cN / dtex as warp, using polyester fiber of Toray Industries, Ltd. as the weft. Weaved.

比較例2は織物シートの荷重(N/10mm)/目付け(g/m)が15.5であり、強力利用率(%)も68.7%と低い値であった。比較例2は、糸の強度が低く、また織物を構成する経緯の糸の繊度、並びに織組織が適切でないため、必要な耐力を得るために多くの糸量を使用しているため、補強用繊維シートとして好ましくないものであった。 In Comparative Example 2, the load (N / 10 mm) / weight per unit area (g / m 2 ) of the woven fabric sheet was 15.5, and the strong utilization rate (%) was a low value of 68.7%. In Comparative Example 2, the strength of the yarn is low, and the fineness of the yarn constituting the woven fabric and the woven structure are not appropriate. Therefore, a large amount of yarn is used to obtain the required yield strength. It was not preferable as a fiber sheet.

本発明の補強繊維シートは高強力繊維を経糸に用いた織物であり、道路の床盤、橋脚、建物の柱、および壁などの補強に有用であり、効果的な補強が行えるとともに施工時の取り扱い、軽量性に優れた工業的価値の高いものである。   The reinforcing fiber sheet of the present invention is a woven fabric using high-strength fibers as warps, and is useful for reinforcing road floors, bridge piers, building columns, walls, and the like. High industrial value with excellent handling and light weight.

1 経糸方向
1 Warp direction

Claims (7)

経糸に補強用繊維を用い、緯糸に前記経糸より細い繊度の糸を用いて製織された補強用繊維シートであって、
x=(経糸カバーファクター)=(経糸繊度(dtex)/繊維の密度(g/cm))^1/2×(経糸密度(本/cm))
y=(緯糸カバーファクター)=(緯糸繊度(dtex)/繊維の密度(g/cm)))^1/2×(緯糸密度(本/cm))
としたとき、xとyとの関係が下記の(1)および(2)式を満足することを特徴とする補強用繊維シート。
600≦x≦1000 ・・・(1)
-0.025x+37≦y≦-0.025x+53・・(2)
A reinforcing fiber sheet woven using a reinforcing fiber for the warp, and a weft having a fineness finer than the warp,
x = (warp cover factor) = (warp fineness (dtex) / fiber density (g / cm 3 )) ^ 1/2 × (warp density (lines / cm))
y = (weft cover factor) = (weft fineness (dtex) / fiber density (g / cm 3 ))) ^ 1/2 × (weft density (lines / cm))
The reinforcing fiber sheet is characterized in that the relationship between x and y satisfies the following formulas (1) and (2).
600 ≦ x ≦ 1000 (1)
-0.025x + 37≤y≤-0.025x + 53 (2)
織物10mm幅における荷重(N/10mm)/織物目付け(g/m)が20以上であることを特徴とする請求項1に記載の補強用繊維シート。 2. The reinforcing fiber sheet according to claim 1, wherein a load (N / 10 mm) / weighing basis weight (g / m 2 ) in a fabric 10 mm width is 20 or more. 補強用繊維の原糸強力に対する織物の強力利用率が75%以上であることを特徴とする請求項1、2いずれかに記載の補強用繊維シート。   The reinforcing fiber sheet according to any one of claims 1 and 2, wherein the strength utilization ratio of the woven fabric with respect to the raw yarn strength of the reinforcing fiber is 75% or more. 補強用繊維が引張強度25cN/dtex以上のものであることを特徴とする請求項1〜3のいずれか1項に記載の補強用繊維シート。   The reinforcing fiber sheet according to any one of claims 1 to 3, wherein the reinforcing fiber has a tensile strength of 25 cN / dtex or more. 前記補強用繊維がポリエチレン繊維であることを特徴とする請求項1〜4のいずれか1項に記載の補強繊維シート。   The reinforcing fiber sheet according to any one of claims 1 to 4, wherein the reinforcing fiber is a polyethylene fiber. 補強用繊維シートの織組織が、杉綾織であることを特徴とする、請求項1〜5のいずれか1項に記載の補強用繊維シート。   The reinforcing fiber sheet according to any one of claims 1 to 5, wherein the weaving structure of the reinforcing fiber sheet is a cedar weave. 前記請求項1における(1)式が600≦x≦750であることを特徴とする請求項1〜6のいずれかに記載の補強用繊維シート。 The reinforcing fiber sheet according to claim 1, wherein the formula (1) in claim 1 satisfies 600 ≦ x ≦ 750.
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