JP5279375B2 - Nonwoven fabric for reinforcement having reinforcing fiber yarn sheet - Google Patents
Nonwoven fabric for reinforcement having reinforcing fiber yarn sheet Download PDFInfo
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本発明は、強化繊維糸シートを有する補強用不織基布に関する。 The present invention relates to a reinforcing nonwoven fabric having a reinforcing fiber yarn sheet.
補強用不織基布は、樹脂と複合化し繊維強化プラスチック（ＦＲＰ）として使用されたり、コンクリートまたはモルタル表面に張り付けられたりして使用されたりしている。 The reinforcing non-woven base fabric is used as a fiber reinforced plastic (FRP) by being compounded with a resin, or used by being stuck to a concrete or mortar surface.
このような不織基布として、例えば炭素繊維等の強化繊維糸を多数本引き揃えた強化繊維糸シートを、引き揃え方向と垂直方向にポリエステル繊維のステッチング糸で保形したものが開示されている。（例えば特許文献１）。 As such a non-woven base fabric, for example, a reinforced fiber yarn sheet in which a large number of reinforcing fiber yarns such as carbon fibers are aligned is retained with polyester fiber stitching yarns in a direction perpendicular to the alignment direction is disclosed. ing. (For example, patent document 1).
しかしながら、ステッチ糸で保形された従来の補強用不織基布は、不織基布にテンションをかけた場合、目開きまたはねじれが生じてしまう。「目開き」とは、「目ずれ」ともいい、所定の間隔で引き揃えていた強化繊維の間隔が乱される現象である。また、「ねじれ」とは、直線性をもって引き揃えられた強化繊維が蛇行し、直線性が失われる現象である。例えば不織基布に樹脂加工を行う際には、不織基布に対し、樹脂含浸、乾燥、巻き取り等の工程を行うこととなるが、それぞれの工程において張力（テンション）がかかり、目開きが生じてしまう。また、不織基布を用いてＦＲＰを形成する場合、例えばシートワイディング時に、不織基布にテンションがかかり、目開きが生じる。直接不織基布をコンクリート等に巻き付けて使用する際にも、テンションがかかり、目開きが生じる。 However, the conventional reinforcing non-woven base fabric retained by the stitch yarn is open or twisted when tension is applied to the non-woven base fabric. “Opening” is also referred to as “missing”, and is a phenomenon in which the interval between reinforcing fibers arranged at a predetermined interval is disturbed. “Twist” is a phenomenon in which the reinforcing fibers arranged with linearity meander and the linearity is lost. For example, when resin processing is performed on a non-woven base fabric, steps such as resin impregnation, drying and winding are performed on the non-woven base fabric. Opening occurs. Further, when the FRP is formed using a non-woven base fabric, tension is applied to the non-woven base fabric, for example, at the time of sheet wiping, resulting in an opening. Even when the nonwoven fabric is directly wrapped around concrete or the like, tension is applied and an opening occurs.
上記のような目開きが生じると、強化繊維プラスチックにおける強化繊維の含有分布が一定でなくなり、強度の均一性、安定性に欠ける結果となる。
本発明は上記事情に鑑みなされたものであって、ステッチ糸で縫合形成された補強用不織基布であっても、目開き等の問題が生じない補強用不織基布を提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides a reinforcing non-woven base fabric that does not cause problems such as mesh opening even if it is a reinforcing non-woven base fabric formed by stitching with stitch yarns. With the goal.
上記目的は、略平行に引き揃えられた強化繊維糸からなる強化繊維糸シートおよび該シート上に強化繊維糸の引き揃え方向と角度をつけて積層された補助繊維材がステッチング糸により保形され、該補助繊維材と強化繊維糸シートとが固着されてなる補強用不織基布により達成される。 The object is to form a reinforcing fiber yarn sheet composed of reinforcing fiber yarns arranged substantially parallel to each other, and an auxiliary fiber material laminated on the sheet at an angle with the alignment direction of the reinforcing fiber yarns. This is achieved by a reinforcing non-woven base fabric in which the auxiliary fiber material and the reinforcing fiber yarn sheet are fixed.
本発明の補強用不織基布は、繊維強化シートと補助繊維材の積層体がステッチング糸により保形された構成を有している。 The nonwoven fabric for reinforcement of the present invention has a configuration in which a laminate of a fiber reinforced sheet and an auxiliary fiber material is retained by stitching yarns.
本発明の補強用不織基布を構成する繊維強化シートは略平行に引き揃えられた強化繊維糸からなる。 The fiber reinforced sheet constituting the reinforcing non-woven base fabric of the present invention is composed of reinforcing fiber yarns arranged substantially in parallel.
強化繊維糸は、無機系繊維糸または有機系繊維糸であってもよく、無撚りであっても、甘撚り撚りがかけられていてもよい。 The reinforcing fiber yarn may be an inorganic fiber yarn or an organic fiber yarn, and may be untwisted or sweet-twisted.
無機系繊維糸は、無機系繊維のマルチフィラメントが主に用いられる。無機系繊維としては、例えば、炭素繊維、ガラス繊維、ボロン繊維、鋼繊維またはそれらの混合繊維等が使用可能である。繊維糸の太さは、炭素繊維については１Ｋ〜２４Ｋ程度のもの、ガラス繊維については３０〜５０００ｔｅｘ程度のものを使用するようにすればよい。無機系繊維糸の太さは用途および求められる強度により適宜設定されるものであるが、通常は、炭素繊維について３Ｋ〜１２Ｋ程度のもの、ガラス繊維については１００〜３０００ｔｅｘ程度のものが用いられる。 As the inorganic fiber yarn, a multifilament of inorganic fiber is mainly used. As the inorganic fiber, for example, carbon fiber, glass fiber, boron fiber, steel fiber, or a mixed fiber thereof can be used. The thickness of the fiber yarn may be about 1K to 24K for carbon fiber and about 30 to 5000 tex for glass fiber. The thickness of the inorganic fiber yarn is appropriately set depending on the intended use and required strength. Usually, the carbon fiber is about 3K to 12K, and the glass fiber is about 100 to 3000 tex.
有機系繊維糸は有機系繊維のマルチフィラメントが主に用いられる。有機系繊維としては、例えば、高強度ポリエチレン繊維、アラミド繊維、ポリビニルアルコール繊維、ナイロン繊維、ポリエステル繊維、ポリアリレート繊維、ＰＢＯ（ポリフェニレンベンゾビスオキサゾール）繊維、麻等の天然繊維またはそれらの混合繊維等が使用可能である。繊維糸の太さは、高強度ポリエチレン繊維であれば、1〜３０００ｄｔｅｘ、アラミド繊維であれば１〜３０００ｄｔｅｘ程度のものを使用するようにすればよい。有機系繊維糸の太さも、用途および求められる強度により適宜設定されるものであるが、通常は、高強度ポリエチレン繊維であれば、５０〜１５００ｄｔｅｘ、アラミド繊維であれば５０〜２０００ｄｔｅｘ程度で用いられる。 As organic fiber yarns, multifilaments of organic fibers are mainly used. Examples of organic fibers include high-strength polyethylene fibers, aramid fibers, polyvinyl alcohol fibers, nylon fibers, polyester fibers, polyarylate fibers, PBO (polyphenylenebenzobisoxazole) fibers, natural fibers such as hemp, or mixed fibers thereof. Can be used. The thickness of the fiber yarn may be about 1 to 3000 dtex for high-strength polyethylene fiber, and about 1 to 3000 dtex for aramid fiber. The thickness of the organic fiber yarn is also set as appropriate depending on the application and required strength, but is usually 50 to 1500 dtex for high-strength polyethylene fibers and 50 to 2000 dtex for aramid fibers. .
強化繊維糸シートは、糸が略平行に引き揃えられている。引き揃え方は、規則的な目開きがあってもよく、また密に引き揃えてもよい。シートの目付は、例えば、有機系繊維糸シートで１０〜１０００ｇ／ｍ２程度、無機系繊維糸の糸シート、例えば炭素繊維糸シートで１０〜２０００ｇ／ｍ２、ガラス繊維糸シートで１０〜３０００ｇ／ｍ２程度の範囲で調整するようにする。目開きがある場合であっても、密に引き揃える場合であっても、その目開きの大きさ、インターバル、配列が規則的になるように引き揃えるようにする。 In the reinforcing fiber yarn sheet, the yarns are aligned substantially in parallel. As for the alignment method, there may be regular openings or dense alignment. Basis weight of the sheet, for example, organic fiber yarn sheet 10 to 1000 g / m 2 approximately, inorganic fiber yarn yarn sheet, for example, carbon fibers sheet 10 to 2000 g / m 2, a glass fiber yarn sheet 10~3000g Adjust within the range of about / m 2 . Regardless of whether there is a mesh opening or a close alignment, the size, interval, and arrangement of the openings are arranged regularly.
本発明において「略平行」とは、糸の引き揃え方向に厳格に平行でなくてもよいという意味で使用しているものあり、きちんと平行に引き揃えようとしても糸の特性上、また製造工程上そのようにできず不可避的に生じる平行性の乱れは本発明において平行であるという概念で使用していることを意味している。 In the present invention, “substantially parallel” is used in the sense that it does not have to be strictly parallel to the direction in which the yarn is aligned. In addition, the parallel disturbance that cannot be done in this way is used in the present invention based on the concept of parallelism.
強化繊維糸シートには補助繊維材が積層される。補助繊維材は、モノフィラメント糸または複合繊維を用いたマルチフィラメント糸より構成される。 An auxiliary fiber material is laminated on the reinforcing fiber yarn sheet. The auxiliary fiber material is composed of a monofilament yarn or a multifilament yarn using a composite fiber.
本発明に使用する補助繊維材としては、融点差のある少なくとも２以上のポリマーで構成されている複合繊維を用いたマルチフィラメント糸が好ましく使用される。複合繊維とは、断面での各成分の配列が、並列、芯鞘、木目、放射、モザイク、海島、星雲などとして存在するものである。好ましい構造としては、生産性、保形性及び熱融着性の観点から、２成分２層品であり、芯鞘構造のものである。好ましくは鞘部が芯部より低融点のポリマーで構成されている芯鞘構造からなる複合繊維である。なお、融点差は、生産性を考慮すると２０℃以上、好ましくは３０℃以上ものが好ましい。単成分の繊維を用いれば、熱融着時に切れるおそれがあるが、融点差のあるポリマーを用いた繊維であることから、強化繊維糸と補助繊維材と低融点側の融着温度で熱融着させるときに、補助繊維材が切れたり、変形すると行ったことが無い。また、加熱圧着させることで、補助繊維材は扁平化することから、厚さ方向の凹凸の度合いが低下し、平面性に優れたものになる。好ましいフィラメント糸の太さは、１０〜１２０ｔｅｘ程度、保形性能とＦＲＰとしての性能を鑑みれば、２０〜１００ｔｅｘが好ましい。なお、融点差のある少なくとも２以上のポリマーで構成されている複合繊維を用いたモノフィラメント糸を用いることも何ら差し支えない。 As the auxiliary fiber material used in the present invention, a multifilament yarn using a composite fiber composed of at least two or more polymers having different melting points is preferably used. A composite fiber is one in which the arrangement of each component in the cross-section exists as a parallel, core-sheath, wood grain, radiation, mosaic, sea island, nebula, and the like. A preferable structure is a two-component two-layer product from the viewpoint of productivity, shape retention and heat-fusibility, and a core-sheath structure. Preferably, it is a composite fiber having a sheath-core structure in which the sheath part is made of a polymer having a melting point lower than that of the core part. Note that the melting point difference is 20 ° C. or higher, preferably 30 ° C. or higher in consideration of productivity. If single-component fibers are used, they may break at the time of heat-sealing. However, because they are fibers using polymers with different melting points, heat-melting is performed at the fusion temperature of the reinforcing fiber yarn and auxiliary fiber material on the low-melting side. It has never been done when the auxiliary fiber material is cut or deformed. Moreover, since the auxiliary fiber material is flattened by thermocompression bonding, the degree of unevenness in the thickness direction is reduced, and the flatness is excellent. A preferable filament yarn thickness is about 10 to 120 tex, and 20 to 100 tex is preferable in view of shape retention performance and FRP performance. Note that it is possible to use a monofilament yarn using a composite fiber composed of at least two polymers having different melting points.
複合繊維の中で、保形性能及び生産性の観点から、材質として、低融点ポリマーおよび高融点ポリマー共にオレフィンポリマーが好ましい。特に好ましくは、高融点ポリマーとしてポリプロピレンポリマー、低融点ポリマーとして、ポリエチレンまたは低融点ポリプロピレンからなる組合せ、すなわち狭義のポリオレフィンポリマーの組合せである。具体的に例示される、好ましい構造及び材質は、芯鞘構造でポリプロピレン（芯部）／ポリエチレン（鞘部）、ポリプロピレン（芯部）／低融点ポリプロピレン（鞘部）である。 Among the composite fibers, from the viewpoint of shape retention performance and productivity, the olefin polymer is preferred as the material for both the low melting point polymer and the high melting point polymer. Particularly preferred is a combination of polypropylene polymer as the high melting point polymer and polyethylene or low melting point polypropylene as the low melting point polymer, that is, a combination of polyolefin polymers in a narrow sense. Preferable structures and materials specifically exemplified are a core-sheath structure and are polypropylene (core part) / polyethylene (sheath part) and polypropylene (core part) / low melting point polypropylene (sheath part).
補助繊維材は、強化繊維糸の引き揃え方向と角度をつけて積層される。強化繊維糸の引き揃え方向に対し「角度をつけて」とは、強化繊維糸の引き揃え方向と平行でなく、という言う意味である。角度としては強化繊維糸と補助繊維材のなす狭角が、０度より大きく、９０度より小さくなるように積層する。好ましくはその角度は１５〜８５度、より好ましくは２０〜６０度である。その角度が大きすぎると、効果は変わらない割に、不織基布製造が難しくなる。またその角度が小さすぎると、目開き、ねじれを抑制する効果が薄くなる。 The auxiliary fiber material is laminated at an angle with the direction in which the reinforcing fiber yarns are aligned. “At an angle” with respect to the aligning direction of the reinforcing fiber yarns means not parallel to the aligning direction of the reinforcing fiber yarns. The angles are laminated so that the narrow angle formed by the reinforcing fiber yarn and the auxiliary fiber material is larger than 0 degree and smaller than 90 degrees. Preferably, the angle is 15 to 85 degrees, more preferably 20 to 60 degrees. If the angle is too large, it will be difficult to produce a nonwoven fabric, although the effect will not change. Moreover, when the angle is too small, the effect which suppresses an opening and a twist will become thin.
補助繊維材同士は、略平行に引き揃えられている。引き揃え方は、規則的な目開きがあってもよく、また密に引き揃えてもよく、０．２〜１５本／インチの範囲で調整するようにする。本発明の補強用不織布を繊維強化プラスチックに使用する場合は、補助繊維材としてオレフィン系熱融着マルチフィラメント糸を使用し、好ましくは目付を０．５〜３本／インチ程度に調整して使用するようにすればよい。目開きがある場合であっても、密に引き揃える場合であっても、その目開きの大きさ、インターバル、配列が規則的になるように引き揃えるようにする。 The auxiliary fiber materials are aligned substantially in parallel. The alignment method may be a regular mesh or may be closely aligned, and is adjusted in the range of 0.2 to 15 lines / inch. When the reinforcing nonwoven fabric of the present invention is used for fiber reinforced plastics, an olefin-based heat-sealed multifilament yarn is used as an auxiliary fiber material, preferably with a basis weight adjusted to about 0.5 to 3 / inch. You just have to do it. Regardless of whether there is a mesh opening or a close alignment, the size, interval, and arrangement of the openings are arranged regularly.
強化繊維糸と補助繊維材を積層する具体的な手段は、特に限定されず、公知の方法、装置を使用することができ、例えば、特開２００７−１３８３６１号に記載されるような、縦編み機構を有する多軸挿入装置などを使用して上記した態様の積層体を形成することができる。 The specific means for laminating the reinforcing fiber yarn and the auxiliary fiber material is not particularly limited, and a known method and apparatus can be used. For example, warp knitting as described in JP-A-2007-138361 The laminated body of the above-described aspect can be formed using a multi-axis insertion device having a mechanism.
以上のようにして構成される強化繊維糸シートと補助繊維材の積層体を、ステッチング糸により縫い合わせる。ステッチング糸としてはポリエステル繊維糸、ナイロン繊維糸、ガラス繊維糸、アラミド繊維糸、ポリプロピレン繊維糸、ポリフェニレンスルフィド繊維糸等が例示でき、生産性、コスト等の観点から、ポリエステル繊維糸、ナイロン繊維糸が好ましい。ステッチング糸の太さは、１０〜１００ｄｔｅｘ程度が用いられ、連続生産における作業性の観点から、２０〜９０ｄｔｅｘが好ましい。縫い合わせ方は公知の種々の方法を用いればよく、該方法等を使用し、強化繊維糸シートと補助繊維材の積層体構成が、持ち運び、運搬等により大きく型くずれ、変形、破壊されないように縫い合わせられておればよい。本発明においてはこのような縫い合わせを「保形」と表現している。 The laminate of the reinforcing fiber yarn sheet and the auxiliary fiber material configured as described above is stitched together with stitching yarns. Examples of stitching yarns include polyester fiber yarns, nylon fiber yarns, glass fiber yarns, aramid fiber yarns, polypropylene fiber yarns, polyphenylene sulfide fiber yarns, etc. From the viewpoint of productivity, cost, etc., polyester fiber yarns, nylon fiber yarns Is preferred. The thickness of the stitching yarn is about 10 to 100 dtex, and 20 to 90 dtex is preferable from the viewpoint of workability in continuous production. Various known methods may be used for the stitching, and the laminated structure of the reinforcing fiber yarn sheet and the auxiliary fiber material is sewn so as not to be greatly deformed, deformed or destroyed by carrying or carrying. It only has to be. In the present invention, such stitching is expressed as “shape retention”.
以上のように保形された強化繊維糸シートと補助繊維材の積層体を加熱・加圧し補助繊維材を、強化繊維シートに固着させる。加熱温度は補助繊維材の低融点側の融点温度以上、高融点側の融点より低い温度の範囲で調整される。圧力は、固着を確実に行うために行うものであり、特に限定されない。 The laminated body of the reinforcing fiber yarn sheet and the auxiliary fiber material retained as described above is heated and pressurized to fix the auxiliary fiber material to the reinforcing fiber sheet. The heating temperature is adjusted within the range of the melting point temperature on the low melting point side of the auxiliary fiber material and lower than the melting point on the high melting point side. The pressure is applied in order to ensure the fixing, and is not particularly limited.
強化繊維糸と補助繊維材との固着は、強化繊維糸と補助繊維材とを積層し、ステッチング糸により保形される前の段階で行ってもよい。しかしながら、この場合、ステッチング糸による保形の前に加熱・加圧工程が入るため、通常の多軸挿入機をそのまま使用することができない、という問題が生じるので、強化繊維糸と補助繊維材との固着はステッチング糸により保形が行われた後に行うことが好ましい。 The reinforcing fiber yarn and the auxiliary fiber material may be fixed in a stage before the reinforcing fiber yarn and the auxiliary fiber material are stacked and retained by the stitching yarn. However, in this case, since a heating / pressurizing step is performed before shape retention with the stitching yarn, there is a problem that a normal multi-axis insertion machine cannot be used as it is. It is preferable that the fixing is performed after the shape-retaining is performed with the stitching yarn.
以上のようにして得られる補強用不織基布は、複数の当該基布を積層して使用してもよい。その際、積層した複数の当該基布をステッチング糸により縫合してもよい。また、別の態様として、強化繊維糸と補助繊維材とを固着する前の不織基布を複数積層し、該積層体を加熱・加圧して固着と同時に積層を行ってもよい。また別の態様として強化繊維糸シートと補助繊維材の積層体を複数積層し、その後ステッチング糸により保形し、固着を行った構成でもよい。 The reinforcing non-woven base fabric obtained as described above may be used by laminating a plurality of such base fabrics. At that time, the plurality of laminated base fabrics may be sewn with stitching yarns. As another aspect, a plurality of non-woven base fabrics before the reinforcing fiber yarn and the auxiliary fiber material are fixed may be laminated, and the laminated body may be heated and pressurized to be laminated simultaneously with fixing. As another embodiment, a configuration in which a plurality of laminates of reinforcing fiber yarn sheets and auxiliary fiber materials are laminated and then shaped by stitching yarns and fixed may be used.
本発明の補強用不織基布は、強化繊維糸と補助繊維材との積層、該積層体のステッチング糸による保形、および補助繊維材の強化繊維シートへの固着は、連続的に製造可能であり、当業者であれば上記開示があれば容易にそのような製造工程を設計できる。 The reinforcing non-woven base fabric of the present invention is produced continuously by laminating the reinforcing fiber yarn and the auxiliary fiber material, retaining the shape of the laminate with the stitching yarn, and fixing the auxiliary fiber material to the reinforcing fiber sheet. It is possible, and those skilled in the art can easily design such a manufacturing process with the above disclosure.
本発明の補強用不織基布は、樹脂と複合化しプリプレグ、ＦＲＰとして使用されたり、コンクリートまたはモルタル表面に張り付けられたりして使用される。本発明の補強用不織基布は、使用の際にテンションや負荷がかかっても目開き、ねじれが生じないので、本発明の補強用不織基布をテンションがかかるような使用により構造体の構成要素とするような構造体、成形体を製造する場合に特に有用であり、該構造体、成形体の強度が安定して得られ、強度の部分的不均一性を防止できる。 The non-woven fabric for reinforcement of the present invention is used as a prepreg or FRP by being combined with a resin, or pasted on a concrete or mortar surface. The reinforcing non-woven base fabric of the present invention does not open or twist even when tension or load is applied during use. It is particularly useful in the case of producing a structure or a molded body that is used as a constituent element of the above, and the strength of the structure and the molded body can be stably obtained, and partial unevenness of strength can be prevented.
強化繊維糸、補助繊維材、ステッチング糸として下記のものを使用した。 The following were used as reinforcing fiber yarns, auxiliary fiber materials, and stitching yarns.
強化繊維糸：炭素繊維糸（商標名パイロフィル：三菱レイヨン社製）
繊維糸の太さ：１２Ｋ
Reinforced fiber yarn: Carbon fiber yarn (trade name: Pyrofil: manufactured by Mitsubishi Rayon Co., Ltd.)
Fiber thread thickness: 12K
補助繊維材：オレフィン系熱融着マルチフィラメント糸（商標名熱融着パイレン、６８０ｄ）
該パイレンは、マルチフィラメント糸であり、各フィラメントは芯部が融点１６５℃のポリプロピレン、鞘部が融点９８℃のポリエチレンで構成され、太さ６８０デニールを有する。６０フィラメント。比重０．９３。
Auxiliary fiber material: Olefin-based heat-sealed multifilament yarn (trade name: heat-sealed pyrene, 680d)
The pyrene is a multifilament yarn, and each filament is composed of polypropylene having a melting point of 165 ° C. and a sheath having a melting point of 98 ° C., and has a thickness of 680 denier. 60 filaments. Specific gravity 0.93.
ステッチング糸：太さ８３ｄｔｅｘのポリエステル繊維糸 Stitching yarn: polyester fiber yarn with a thickness of 83 dtex
実施例１
補強用不織基布の製造
加熱・加圧ローラを備えた多軸挿入装置において、強化繊維糸を不織布の長手方向に対して＋７５°の角度で引き揃え、両端のピンに引っかけることを繰り返すことで、強化繊維糸をシート状に形成した。強化繊維糸は１０本／インチで打ち込んだ。
Example 1
Manufacture of reinforcing non-woven fabric In a multi-axis insertion device equipped with heating and pressure rollers, the reinforcing fiber yarns are aligned at an angle of + 75 ° with respect to the longitudinal direction of the nonwoven fabric and repeatedly hooked on the pins at both ends. The reinforcing fiber yarn was formed into a sheet shape. The reinforcing fiber yarn was driven at 10 pieces / inch.
さらに補助繊維材を不織布の長手方向に対して−７５°に引き揃え、両端のピンに引っかけることを繰り返し、強化繊維糸シートの表層側に補助繊維材を引き揃え、１本／インチで打ち込み、繊維強化糸の上に補助繊維材を積層した。 Furthermore, the auxiliary fiber material is aligned at −75 ° with respect to the longitudinal direction of the nonwoven fabric, and repeatedly hooked on the pins at both ends, the auxiliary fiber material is aligned on the surface layer side of the reinforcing fiber yarn sheet, and driven at 1 / inch, An auxiliary fiber material was laminated on the fiber reinforced yarn.
強化繊維糸シート、補助繊維材を積層した状態でステッチング糸により両層を一体化し保形を行った。 In a state where the reinforcing fiber yarn sheet and the auxiliary fiber material were laminated, the two layers were integrated with the stitching yarn to perform shape retention.
次いで保形された上記積層シートを上下面から一対の加熱・加圧ローラでニップ（加熱温度：１００℃、線圧：３ｋｇ／ｃｍ）することで、補助繊維剤の低融点成分を溶融固着して強化繊維糸に固定した。 Next, the laminated sheet thus held is niped from above and below with a pair of heating and pressure rollers (heating temperature: 100 ° C., linear pressure: 3 kg / cm) to melt and fix the low melting point component of the auxiliary fiber agent. And fixed to the reinforcing fiber yarn.
上記で得られた不織基布について、樹脂含浸、乾燥、巻き取り等の工程を加え、プリプレグを作製した。またシートワインディング法によりＦＲＰを作製した。得られたプリプレグ及びＦＲＰを確認したところ、補強用不織基布は、図１に示すように目開きのない状態で存在していた。図１中、１は強化繊維糸、２は補助繊維材、３はステッチング糸を示す。 About the nonwoven base fabric obtained above, processes, such as resin impregnation, drying, and winding, were added and the prepreg was produced. Further, FRP was produced by a sheet winding method. When the obtained prepreg and FRP were confirmed, the non-woven fabric for reinforcement was present without opening as shown in FIG. In FIG. 1, 1 is a reinforcing fiber yarn, 2 is an auxiliary fiber material, and 3 is a stitching yarn.
比較例２
比較として補助繊維材を用いなかった以外、実施例１と同様な方法にて不織基布を作製し、当該不織基布を用いてプリプレグ及びＦＲＰを作製したところ、補強用不織基布は、図２に示すように、目開きの生じた状態で存在していた。
Comparative Example 2
As a comparison, a non-woven base fabric was prepared in the same manner as in Example 1 except that no auxiliary fiber material was used, and prepreg and FRP were prepared using the non-woven base fabric. As shown in FIG. 2, it was present in a state in which an opening was generated.
実施例２〜４
上記強化繊維糸を、下記種類の繊維糸に変更した以外、実施例１と同様にして、それぞれ不織基布を製造し、それを基にプリプレグ及びＦＲＰを作製した。補強用不織基布は、炭素繊維を使用した場合と同様に目開きのない図１に示された状態で存在していた。
Examples 2-4
Non-woven fabrics were produced in the same manner as in Example 1 except that the reinforcing fiber yarns were changed to the following types of fiber yarns, and prepregs and FRPs were produced based on the nonwoven fabrics. The reinforcing non-woven fabric was present in the state shown in FIG. 1 with no openings as in the case of using carbon fibers.
・ガラス繊維：日東紡績社製ロービング １１５０ｔｅｘ
・アラミド繊維：帝人社製「テクノーラ」 １６７ｔｅｘ
・ポリビニルアルコール繊維：クラレ社製「ビニロン」 ２００ｔｅｘ
・ Glass fiber: Nitto Boseki Roving 1150tex
・ Aramid fiber: Teijin's “Technora” 167tex
-Polyvinyl alcohol fiber: Kuraray "Vinylon" 200tex
１：強化繊維糸
２：補助繊維
３：ステッチング糸
1: Reinforcing fiber yarn 2: Auxiliary fiber 3: Stitching yarn
Claims (5)
補助繊維材が、融点差のある少なくとも２以上のポリマーで構成されている複合繊維より構成され、
該複合繊維は、高融点ポリマーとしてポリプロピレンポリマー、低融点ポリマーとして、ポリエチレンまたは低融点ポリプロピレンからなる組合せであり、
該補助繊維材と強化繊維糸シートとが固着されてなる補強用不織基布。 Reinforcing fiber yarn sheet composed of reinforcing fiber yarns arranged substantially parallel to each other, and auxiliary fibers laminated on the sheet at an angle so as to be larger than 0 degrees and smaller than 90 degrees with the alignment direction of the reinforcing fiber yarns The material is shaped by stitching yarn,
The auxiliary fiber material is composed of a composite fiber composed of at least two polymers having a melting point difference,
The composite fiber is a combination of polypropylene polymer as a high melting point polymer, polyethylene or low melting point polypropylene as a low melting point polymer,
A reinforcing non-woven base fabric comprising the auxiliary fiber material and a reinforcing fiber yarn sheet fixed to each other.
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| ES2910651T3 (en) * | 2010-03-18 | 2022-05-13 | Teijin Carbon Europe Gmbh | Stitched multiaxial fabric |
| JP5788734B2 (en) * | 2011-08-10 | 2015-10-07 | トヨタ自動車株式会社 | Fiber-reinforced resin molded body and vehicle interior material using the same |
| CN102677332A (en) * | 2012-05-29 | 2012-09-19 | 蔡紫林 | Textile fabric |
| WO2016159340A1 (en) | 2015-04-03 | 2016-10-06 | 三菱瓦斯化学株式会社 | Composite material, process for producing composite material, and process for producing molded article |
| JP6659322B2 (en) | 2015-04-03 | 2020-03-04 | 国立大学法人岐阜大学 | Composite material, method for producing composite material, and method for producing molded article |
| JP6210097B2 (en) * | 2015-07-28 | 2017-10-11 | 株式会社豊田自動織機 | Fabric laminate, fabric laminate production method, and fabric laminate production apparatus |
| EP3392387A4 (en) * | 2015-12-14 | 2018-12-26 | Mitsubishi Chemical Corporation | Multiaxial-inlay knitted fabric base material production method, multiaxial-inlay knitted fabric base material, and fiber-reinforced composite material |
| JP6650296B2 (en) * | 2016-03-04 | 2020-02-19 | 倉敷紡績株式会社 | Substrate for fiber reinforced plastic, multilayer substrate for fiber reinforced plastic, preform for fiber reinforced plastic, and method for producing the same |
| CN109923253B (en) * | 2016-11-01 | 2020-03-31 | 日产自动车株式会社 | Reinforcing base material for composite material, and method for producing reinforcing base material for composite material |
| JP6729712B2 (en) * | 2016-11-01 | 2020-07-22 | 日産自動車株式会社 | Reinforcement base material for composite material, composite material, and method for manufacturing reinforcement base material for composite material |
| CN114174050A (en) * | 2019-07-30 | 2022-03-11 | 三菱瓦斯化学株式会社 | Method for producing molded article and composite material |
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