JP2015117442A - Reinforcing fiber woven fabric and method for producing the same - Google Patents
Reinforcing fiber woven fabric and method for producing the same Download PDFInfo
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Abstract
Description
本発明は繊維強化複合材料用として優れた特性を発揮する一方向性補強繊維織物及びその製造方法に関するもので、特に土木建築用補強織物や一般的な産業用途などの最適な一方向性補強繊維織物とその製造方法に関する。 TECHNICAL FIELD The present invention relates to a unidirectional reinforcing fiber woven fabric that exhibits excellent properties for use in fiber reinforced composite materials and a method for producing the same, and more particularly, an optimal unidirectional reinforcing fiber for civil engineering and building reinforced fabrics and general industrial applications. The present invention relates to a woven fabric and a manufacturing method thereof.
従来から繊維強化複合材料用として優れた物性を発揮する補強繊維織物は土建用コンクリ−ト構造物の補強材として幅広く使用されている。特に強度を必要とする分野ではアラミド繊維や炭素繊維などの強化繊維素材を用いた強化繊維シート状物が多く使用されている。例えば特許第３２７９０４９号や特許第３０１９００４号では、橋、トンネル、煙突や建物などコンクリ−ト構造物の補修ならびに補強に炭素繊維糸条を用いた補強繊維織物が提案され、該織物に使用される炭素繊維糸条の多くがフィラメント数１２０００本の汎用的な炭素繊維糸条を用いて製織されている。また、これらの提案されている織物の目付けは３００ｇ／ｍ２前後の比較的低目付け織物が中心である。しかしながら、従来の炭素繊維強化プラスチックは、たとえばフィラメント数３０００本の細い炭素繊維糸条がたて方向とよこ方向または、たて方向に配列した炭素繊維目付けが２００〜４００ｇ／ｍ２の薄い一方向或いは二方向性織物を用いてあらかじめ樹脂を含浸したプリプレグを多数枚積層してオートクレーブ中で硬化して成形しているので、（１）炭素繊維糸条が細いので炭素繊維糸条の生産性が低い、（２）細い糸条で織物を製造するために織物の生産性が低い、（３）織物目付けが薄いので所定の厚みに積層するのに積層枚数が多くなり積層の手間が大きくなる、（４）プリプレグ化工程が必要となるのでプリプレグの製造コストが加わる、（５）樹脂を硬化するためのオートクレーブが必要となり大きな設備投資が必要となるという課題があった。
近年、それらの課題を解決するため、ラ−ジトウといわれる太い炭素繊維糸条を用いた強化繊維織物として特許第３９９１４３９号や特許第３９９１４４０号が提案されている。特許第３９９１４３９号は織物目付けが４００〜７００ｇ／ｍ２、また、特許第３９９１４４０号は織物目付けが４５０〜１５００ｇ／ｍ２という非常に高目付け織物を提案している。産業用途の比較的高目付けの繊維強化プラスチックを得るには、このような高目付けの補強繊維織物は有効である。しかしながら、例えば土建用コンクリ−ト構造物の補強材はハンドレイアップ成形であることから高目付け織物では樹脂の含浸性が悪くなるので、ラ−ジトウを用いた強化繊維織物でありながら３００ｇ／ｍ２以下の比較的低目付けの織物が望まれている。
Conventionally, reinforced fiber fabrics exhibiting excellent physical properties for fiber-reinforced composite materials have been widely used as reinforcing materials for concrete structures for construction. In particular, in a field requiring strength, a reinforcing fiber sheet using a reinforcing fiber material such as aramid fiber or carbon fiber is often used. For example, in Japanese Patent Nos. 3279049 and 3019004, reinforcing fiber fabrics using carbon fiber yarns for repair and reinforcement of concrete structures such as bridges, tunnels, chimneys and buildings are proposed and used for the fabrics. Most carbon fiber yarns are woven using general-purpose carbon fiber yarns having 12,000 filaments. Further, the fabric weight of these proposed fabrics is mainly a relatively low fabric weight of about 300 g / m 2 . However, the conventional carbon fiber reinforced plastic is, for example, a thin unidirectional carbon fiber basis weight of 200 to 400 g / m 2 in which thin carbon fiber yarns having 3000 filaments are arranged in the warp direction and the transverse direction, or in the warp direction. Since a large number of prepregs impregnated with resin in advance using bi-directional woven fabrics are laminated and cured in an autoclave, (1) the carbon fiber yarns are thin and the productivity of carbon fiber yarns is low. (2) The production of the woven fabric with thin yarns is low, and the productivity of the woven fabric is low. (3) Since the fabric weight is thin, the number of laminated layers increases to increase the number of layers to be laminated to a predetermined thickness. 4) Since a prepreg process is required, the production cost of the prepreg is added. (5) An autoclave for curing the resin is required, which requires a large capital investment. There was a problem.
In recent years, in order to solve these problems, Patent No. 3991439 and Patent No. 3991440 have been proposed as reinforcing fiber fabrics using thick carbon fiber yarns called large tows. Patent No. 3991439 proposes a very high weight fabric with a fabric weight of 400 to 700 g / m 2 , and Patent No. 3991440 proposes a very high weight fabric with a fabric weight of 450 to 1500 g / m 2 . In order to obtain a fiber reinforced plastic having a relatively high basis weight for industrial use, such a high basis weight reinforcing fiber woven fabric is effective. However, for example, since the reinforcing material for concrete structures for earthwork is hand lay-up molding, the impregnation of the resin becomes worse in a high-weight fabric, so that it is 300 g / m while being a reinforcing fiber fabric using a large tow. A fabric with a relatively low basis weight of 2 or less is desired.
本発明は、太い炭素繊維糸条を用いても、ハンドレイアップ成形の樹脂の含浸性に優れ、成形されたときに機械的特性に優れる安価な炭素繊維織物ならびにその製造方法を提供するものである。 The present invention provides an inexpensive carbon fiber woven fabric excellent in impregnation of resin for hand lay-up molding and excellent in mechanical characteristics even when using thick carbon fiber yarns, and a method for producing the same. is there.
即ち、本発明は、
［１］たて糸に多数本の炭素繊維マルチフィラメント糸を配列し、該炭素繊維マルチフィラメント糸より細い補助繊維糸をよこ糸に配列してなる一方向性補強繊維織物であって、該炭素繊維マルチフィラメント糸のフィラメント数が５００００〜１０００００本であるか該炭素繊維マルチフィラメント糸の総繊度が３３０００〜７４２５０デシテックスであり、該炭素繊維マルチフィラメント糸の糸幅が１０ｍｍ以上であり、かつ、織物目付けが３００ｇ／ｍ２以下であることを特徴とする一方向性補強繊維織物である。
［２］前記炭素繊維マルチフィラメント糸が実質的に屈曲せずに炭素繊維糸条群を構成し、該炭素繊維糸条群の両面それぞれに該炭素繊維糸条群と交差する複数のよこ糸補助繊維糸からなるよこ糸補助繊維糸群を有し、さらに、複数のたて糸補助繊維糸からなるたて糸補助繊維糸群を有し、該よこ糸補助繊維糸群と該たて方向補助繊維糸群とが織組織をなして該炭素繊維糸条群を一体に保持していることを特徴とする請求項１に記載の一方向性補強繊維織物である。
［３］前記炭素繊維マルチフィラメント糸および／またはたて糸補助繊維糸が、前記よこ糸補助繊維との交点において、該よこ糸補助繊維糸に連続的に付着した熱可塑性ポリマーによって接着されていることを特徴とする、請求項１または２に記載の一方向性補強繊維織物である。
［４］たて方向に平行に配列した炭素繊維マルチフィラメント糸から構成された一方向性補強繊維織物の製造方法であって、該炭素繊維マルチフィラメント糸を拡幅し、メ−ル部の内寸口径幅が１０ｍｍ以上であるヘルドを用いて該炭素繊維マルチフィラメント糸を開口し、かつ、該炭素繊維マルチフィラメント糸または織物を加熱することを特徴とする一方向性補強繊維織物の製造方法である。
That is, the present invention
[1] A unidirectional reinforcing fiber woven fabric in which a large number of carbon fiber multifilament yarns are arranged in a warp yarn, and auxiliary fiber yarns thinner than the carbon fiber multifilament yarn are arranged in a weft yarn, the carbon fiber multifilament The number of filaments of the yarn is 50,000 to 100,000, or the total fineness of the carbon fiber multifilament yarn is 33,000 to 74250 dtex, the width of the carbon fiber multifilament yarn is 10 mm or more, and the fabric weight is 300 g. / M 2 or less, a unidirectional reinforcing fiber fabric.
[2] A plurality of weft auxiliary fibers in which the carbon fiber multifilament yarn forms a carbon fiber yarn group without substantially bending, and intersects the carbon fiber yarn group on both sides of the carbon fiber yarn group. A weft auxiliary fiber yarn group consisting of a plurality of warp auxiliary fiber yarns, wherein the weft auxiliary fiber yarn group and the warp direction auxiliary fiber yarn group form a woven structure. The unidirectional reinforcing fiber fabric according to claim 1, wherein the carbon fiber yarn group is integrally held.
[3] The carbon fiber multifilament yarn and / or the warp auxiliary fiber yarn are bonded by a thermoplastic polymer continuously adhered to the weft auxiliary fiber yarn at the intersection with the weft auxiliary fiber. The unidirectional reinforcing fiber fabric according to claim 1 or 2.
[4] A method for producing a unidirectional reinforcing fiber fabric composed of carbon fiber multifilament yarns arranged parallel to the warp direction, wherein the carbon fiber multifilament yarns are widened and the inner dimensions of the mail part A method for producing a unidirectional reinforcing fiber woven fabric, wherein the carbon fiber multifilament yarn is opened using a heald having a caliber width of 10 mm or more, and the carbon fiber multifilament yarn or woven fabric is heated. .
本発明によれば、太い炭素繊維糸条を用いても、ハンドレイアップ成形の樹脂の含浸性に優れ、成形されたときに機械的特性に優れる安価な炭素繊維強化織物が得られる。 According to the present invention, even if a thick carbon fiber yarn is used, an inexpensive carbon fiber reinforced fabric having excellent resin impregnation properties in hand lay-up molding and excellent mechanical properties when molded can be obtained.
（補強繊維）
本発明で使用する炭素繊維マルチフィラメント糸はフィラメント数５００００〜１０００００本で糸条繊度が３３０００〜７４２５０デシテックスの炭素繊維糸条である。
さらに、炭素繊維は引張強度が３０００〜６０００ＭＰａのものを用いることが一般産業用途用の繊維強化プラスチックとして好ましい。本発明において、炭素繊維の引張強度とは、ＪＩＳ Ｒ ７６０１に準拠して測定したストランド強度を指す。
(Reinforcing fiber)
The carbon fiber multifilament yarn used in the present invention is a carbon fiber yarn having a filament number of 50,000 to 100,000 and a yarn fineness of 33,000 to 74250 dtex.
Further, it is preferable to use carbon fiber having a tensile strength of 3000 to 6000 MPa as a fiber reinforced plastic for general industrial use. In the present invention, the tensile strength of carbon fiber refers to the strand strength measured according to JIS R7601.
本発明に用いる炭素繊維には、エポキシ基、水酸基、アミノ基、カルボキシル基、カルボン酸無水物基、アクリレート基およびメタクリレート基から選ばれる1種類以上の官能基を持つ物質を０．０１〜５質量％付着させ、繊維束の収束性や、繊維強化プラスチックとしたときの炭素繊維とマトリックス樹脂との接着性を改善するサイズ剤として用いることができる。 The carbon fiber used in the present invention contains 0.01 to 5 mass of a substance having one or more functional groups selected from an epoxy group, a hydroxyl group, an amino group, a carboxyl group, a carboxylic anhydride group, an acrylate group, and a methacrylate group. % And can be used as a sizing agent to improve the convergence of the fiber bundle and the adhesion between the carbon fiber and the matrix resin when it is made into a fiber reinforced plastic.
（よこ糸補助繊維糸）
本発明に用いるよこ糸補助繊維糸は、補強繊維である炭素繊維マルチフィラメント糸より細い任意の有機繊維または無機繊維を用いることができる、よこ糸補助繊維糸には１００ｔｅｘ以下のガラス繊維糸条を用いることが好ましい。炭素繊維マルチフィラメント糸および／またはたて糸補助繊維糸を固定するため、熱可塑性ポリマーをガラス繊維糸条に線状に連続的に付着せしめて、よこ糸補助繊維糸として用いることが好ましい。熱可塑性ポリマーをガラス繊維糸条に付着する方法は合撚、カバリング、引き揃えなど何ら限定するものではない。
(Weft auxiliary fiber yarn)
The weft auxiliary fiber yarn used in the present invention can be any organic fiber or inorganic fiber thinner than the carbon fiber multifilament yarn that is the reinforcing fiber, and the weft auxiliary fiber yarn should be a glass fiber yarn of 100 tex or less. Is preferred. In order to fix the carbon fiber multifilament yarn and / or the warp auxiliary fiber yarn, it is preferable that the thermoplastic polymer is continuously attached linearly to the glass fiber yarn and used as the weft auxiliary fiber yarn. The method of attaching the thermoplastic polymer to the glass fiber yarn is not limited in any way such as twisting, covering, and drawing.
（たて糸補助繊維糸）
本発明に用いるたて糸補助繊維糸の繊度は補強繊維である炭素繊維マルチフィラメント糸の１／３以下であることが好ましい。
(Warp auxiliary fiber yarn)
The fineness of the warp auxiliary fiber yarn used in the present invention is preferably 1/3 or less of the carbon fiber multifilament yarn which is a reinforcing fiber.
（一方向性補強繊維織物）
本発明の一方向性補強繊維織物は、たて糸である多数の炭素繊維マルチフィラメント糸とよこ糸補助繊維糸からなる。
(Unidirectional reinforcing fiber fabric)
The unidirectional reinforcing fiber fabric of the present invention is composed of a number of carbon fiber multifilament yarns and weft auxiliary fiber yarns which are warp yarns.
また、本発明の一方向性補強繊維織物はたて糸である多数の炭素繊維マルチフィラメント糸が実質的に屈曲せずに炭素繊維糸条群を構成し、該炭素繊維糸条群の両面それぞれに該炭素繊維糸条群と交差する複数のよこ糸補助繊維糸からなるよこ糸補助繊維糸群を有し、さらに、複数のたて糸補助繊維糸からなるたて糸補助繊維糸群を有し、該よこ糸補助繊維糸群と、該たて糸補助繊維糸群とが織組織をなして該炭素繊維糸条群を一体に保持していることが好ましい。 The unidirectional reinforcing fiber woven fabric of the present invention constitutes a carbon fiber yarn group without substantially bending a large number of carbon fiber multifilament yarns which are warp yarns, A weft auxiliary fiber yarn group consisting of a plurality of weft auxiliary fiber yarns intersecting the carbon fiber yarn group, and further comprising a warp auxiliary fiber yarn group consisting of a plurality of warp auxiliary fiber yarns, the weft auxiliary fiber yarn group, The warp auxiliary fiber yarn group preferably forms a woven structure to hold the carbon fiber yarn group together.
該炭素繊維糸条群を屈曲させないために、たて糸補助繊維糸に炭素繊維マルチフィラメント糸より細い糸を用い、該たて糸補助繊維糸群とよこ糸補助繊維糸群が織組織なして、たて糸補助繊維糸が屈曲しながら交互によこ糸補助糸と交錯していることが好ましい。 In order not to bend the carbon fiber yarn group, the warp auxiliary fiber yarn is thinner than the carbon fiber multifilament yarn, and the warp auxiliary fiber yarn group and the weft auxiliary fiber yarn group form a woven structure so that the warp auxiliary fiber yarn is bent. However, it is preferable to cross with the weft auxiliary yarn alternately.
さらに、本発明の一方向性補強繊維織物はたて糸である多数の炭素繊維マルチフィラメント糸および／またはたて糸補助繊維糸が、よこ糸補助繊維糸との交点において、該よこ糸補助繊維糸に連続的に付着した熱可塑性ポリマーによって接着されていることが好ましい。 Further, in the unidirectional reinforcing fiber fabric of the present invention, a large number of carbon fiber multifilament yarns and / or warp auxiliary fiber yarns, which are warp yarns, continuously adhere to the weft auxiliary fiber yarns at the intersections with the weft auxiliary fiber yarns. It is preferable that they are bonded by a thermoplastic polymer.
本発明の一方向性補強繊維織物によれば、従来の細い炭素繊維糸条を用いて得られる織物に比べ、３００ｇ／ｍ２以下の目付であって織物の布厚が小さい、いわゆる嵩密度が０．６ｇ／ｃｍ３前後である織物が容易に得られる。特許第３９９１４３９号には嵩密度０．６５ｇ／ｃｍ３以下の炭素繊維織物が挙げられているが、目付が４００ｇ／ｍ２以上の高目付け織物である。
ここで、嵩密度は下記の算出式で計算される。
嵩密度＝Ｗ／（ｔ×Ａ）
但し、
ｔ：織物の厚み（ｃｍ）
Ａ：織物の面積（ｃｍ２）
Ｗ：織物の面積Ａ中における炭素繊維質量（ｇ）
According to the unidirectional reinforcing fiber fabric of the present invention, compared to a fabric obtained using a conventional thin carbon fiber yarn, the fabric weight is 300 g / m 2 or less and the fabric thickness is small, so-called bulk density. A fabric of around 0.6 g / cm 3 is easily obtained. Patent No. 3991439 mentions a carbon fiber woven fabric having a bulk density of 0.65 g / cm 3 or less, and is a high fabric weight having a basis weight of 400 g / m 2 or more.
Here, the bulk density is calculated by the following formula.
Bulk density = W / (t × A)
However,
t: Thickness of fabric (cm)
A: Area of fabric (cm 2 )
W: Mass of carbon fiber (g) in the area A of the fabric
（織物の製造方法）
本発明の織物の製造方法は製織中に開繊工程を組み入れていることを特徴とする。フィラメント数５００００本以上の炭素繊維マルチフィラメント糸で低目付け織物を得るためには、使用する炭素繊維糸条の本数が少ないので、織物を構成する各炭素繊維糸条の糸幅を１０ｍｍ以上に拡幅しないと目開きの少ない織物は得られない。炭素繊維糸条の糸幅が１０ｍｍ以下であると織物の目開きが大きくなり、外観品位が悪く、成形後の樹脂溜まりとなり繊維強化複合材料の機械物性にも悪影響を及ぼすことから適度な目開きのある織物が良好である。
(Textile manufacturing method)
The method for producing a woven fabric according to the present invention is characterized by incorporating a fiber opening step during weaving. In order to obtain a low-weight fabric with carbon fiber multifilament yarns of 50,000 or more filaments, the number of carbon fiber yarns used is small, so the width of each carbon fiber yarn constituting the fabric is widened to 10 mm or more. Otherwise, a woven fabric with less openings cannot be obtained. If the carbon fiber yarn width is 10 mm or less, the opening of the fabric will be large, the appearance quality will be poor, the resin will remain after molding, and the mechanical properties of the fiber-reinforced composite material will be adversely affected. Good woven fabric.
クリ−ル（図示しない）からよこ取りで供給された複数の炭素繊維マルチフィラメント糸はバックテンションロール１で均一にシート化され、引き続いて擦過ロ−ル２へと導かれる。本発明では該擦過ロールを介することが必須である。何故ならば低目付けでかつ目開きのない織物を得るために、たて糸として配列された炭素繊維マルチフィラメント糸を十分に開繊拡幅する必要があるからである。擦過ロールへの通し方は図１のように山型に通す方法や、擦過ロールを複数本平行に設けてそれぞれの擦過ロールの上下を交互に通す方法など特に限定するものではない。また、それぞれの擦過ロールは回転しないことが好ましい。さらには擦過ロールに加熱装置を併用、或いは該ロール部に熱風を噴射、更には振動装置を設けて併用することにより、炭素繊維マルチフィラメント糸を大きく開繊拡幅することが可能となる。いずれにしても必要目的に応じて開繊拡幅に必要な装置を用いることがより好ましい。しかし、上述したいずれの開繊拡幅方法も過度に適用することにより、毛羽の発生や補強繊維の機械特性を損なう危険があるため、問題が発生しない方法を適宜選択することが好ましい。 A plurality of carbon fiber multifilament yarns supplied by weft removal from a creel (not shown) are uniformly formed into a sheet by a back tension roll 1 and subsequently guided to a rubbing roll 2. In the present invention, it is essential to pass through the rubbing roll. This is because, in order to obtain a woven fabric having a low basis weight and no openings, it is necessary to sufficiently widen and spread the carbon fiber multifilament yarns arranged as warp yarns. The method of passing through the rubbing roll is not particularly limited, such as a method of passing in a mountain shape as shown in FIG. 1 or a method of providing a plurality of rubbing rolls in parallel and alternately passing the upper and lower sides of each rubbing roll. Moreover, it is preferable that each rubbing roll does not rotate. Further, by using a heating device in combination with the rubbing roll, or injecting hot air into the roll portion, and further using a vibration device in combination, the carbon fiber multifilament yarn can be greatly spread and widened. In any case, it is more preferable to use an apparatus necessary for opening and widening according to a necessary purpose. However, excessive application of any of the above-described spread-and-widening methods may lead to the occurrence of fluff or damage to the mechanical properties of the reinforcing fibers, and therefore it is preferable to select a method that does not cause problems.
次いで開繊拡幅された複数の炭素繊維マルチフィラメント糸は駆動搬送ロ−ル群３〜６とダンサロール７を経てヘルド８に導かれる。一方向性補強繊維織物にたて糸補助繊維糸を用いる場合は、たて糸補助繊維糸もそれぞれヘルド８に導かれる。 Subsequently, the plurality of carbon fiber multifilament yarns that have been widened and spread are guided to the heald 8 through the drive conveyance roll groups 3 to 6 and the dancer roll 7. When the warp assisting fiber yarn is used for the unidirectional reinforcing fiber fabric, the warp assisting fiber yarn is also guided to the heald 8 respectively.
本発明では擦過ロ−ル２で拡幅した炭素繊維マルチフィラメント糸の糸幅を布巻きロ−ル１２まで保持するのが理想的であるが、織機の構造上、ヘルドによる開口運動、筬打ち運動で必ず糸幅は収束される。よって、最終的に必要糸幅以上の糸幅をヘルド８通過時に保持している必要がある。しかし、たとえ十分に開繊拡幅してもたて糸の張力の影響によって、また、ヘルドのメ−ル部の内寸口径幅が糸幅以下であることにより工程通過中に収束される傾向にある。このような収束の傾向は、駆動搬送ロール以降のたて糸張力をできるだけ低張力で製織すること、また、炭素繊維マルチフィラメント糸を通すヘルドのメール部の内寸口径幅ｄ（図２に示す）を１０ｍｍ以上にすることによって抑えられる。なお、内寸口高さは特に限定するものではないが、好ましくは２ｍｍ以下とするのが好ましい。 In the present invention, it is ideal to keep the width of the carbon fiber multifilament yarn widened by the rubbing roll 2 up to the cloth winding roll 12. However, due to the structure of the loom, the opening movement and beating movement by the heald The yarn width is always converged. Therefore, it is necessary to finally hold a yarn width greater than the necessary yarn width when passing through the heald 8. However, even if the spread is sufficiently widened, it tends to converge during the process due to the influence of the warp yarn tension and because the inner diameter of the heald mail part is less than the yarn width. The tendency of such convergence is that weaving the warp yarn tension after the drive conveyance roll is as low as possible, and the inner diameter diameter width d (shown in FIG. 2) of the mail portion of the heald through which the carbon fiber multifilament yarn is passed. It can be suppressed by setting it to 10 mm or more. The height of the inner dimension is not particularly limited, but is preferably 2 mm or less.
次に、筬通過後に熱可塑性ポリマーを添附したよこ糸補助繊維糸条（図示しない）をヘルドで開口された、炭素繊維マルチフィラメント糸と炭素繊維マルチフィラメント糸との開口内、もしくは、炭素繊維マルチフィラメント糸とたて糸補助繊維糸との開口内に挿入し筬打ちによって織物が形成される。 Next, inside the openings of the carbon fiber multifilament yarn and the carbon fiber multifilament yarn, or the carbon fiber multifilament yarn, which is opened with a weft auxiliary fiber yarn (not shown) to which a thermoplastic polymer is attached after passing through the heel. A fabric is formed by inserting into the openings of the yarn and the warp auxiliary fiber yarn and punching.
引き続きロール１０〜１１、布巻きロール１２へと順次巻き取る。よこ糸補助繊維糸とたて糸をよこ糸補助繊維糸に付着させた熱可塑性ポリマーにより熱融着させる場合は、ガイドロールを加熱ロ−ルとしてこれに接触させることで熱融着させることができる。また赤外線ヒーター等の非接触ヒーターを設けて熱融着させる手法でも良い。熱融着は、筬打ち後、布巻ロールまでにおこなうことが望ましいが、巻き取った織物の巻き返し作業の中で行うことも可能である。 Then, it winds up to the rolls 10-11 and the fabric winding roll 12 one by one. When heat-welding the weft auxiliary fiber yarn and the warp yarn with the thermoplastic polymer attached to the weft auxiliary fiber yarn, it can be heat-sealed by bringing the guide roll into contact with it as a heating roll. Alternatively, a non-contact heater such as an infrared heater may be provided for heat fusion. The heat fusion is preferably performed after the beating and before the fabric winding roll, but can also be performed in the rewinding operation of the wound fabric.
実施例を以下に説明する。
（実施例１）
炭素繊維（三菱レイヨン株式会社製、パイロフィル（製品名））からなる５０Ｋ（フィラメント本数：５００００本)のマルチフィラメント糸をたて糸に用い、又、２２．５ｔｅｘのガラス繊維（ユニチカグラスファイバー社製）糸条に熱融着繊維（東レ株式会社製）を付着させた補助繊維をよこ糸補助繊維糸として、平織組織を形成し、目付け２００ｇ／ｍ２の一方向性補強繊維織物を製造し、得られた織物の織物開口率と炭素繊維糸条の真直性を評価した。なお、使用したヘルドのメール部の内寸口径幅は１８．８ｍｍである。得られた織物中では一方向に配列された炭素繊維は真直性が得られており、よこ糸補助繊維糸と炭素繊維は接着固化され、しかも、空隙が少なく充分に開繊された補強繊維織物であった。また、作業取り扱い性も良好であった。
なお、ここでいう織物開口率とは織物１０ｃｍ×１０ｃｍ当たりの炭素繊維間の開口部の面積を、織物１０ｃｍ×１０ｃｍの面積に対する割合で表した数値であり、織物の下部から光を照射し、その光の織物に対する透過を画像処理して下記の計算式により求める。
開口率＝開口部面積の和／１００ｃｍ2 × １００（％）
次に得られた一方向性補強繊維織物１ｐｌｙに三菱樹脂株式会社製ＸＬ−８００エポキシ樹脂を含浸させハンドレイアップ成形法で硬化板を作成し、ＪＩＳ Ｋ７０７３のＣＦＲＰの引張試験法に準拠して引張破断強度を評価した。結果を表1に示す。
Examples will be described below.
Example 1
A 50K (filament number: 50000) multifilament yarn made of carbon fiber (manufactured by Mitsubishi Rayon Co., Ltd., Pyrofil (product name)) is used as the warp yarn, and 22.5 tex glass fiber (manufactured by Unitika Glass Fiber) yarn. A plain weave structure was formed using auxiliary fibers in which heat-bonding fibers (manufactured by Toray Industries, Inc.) were attached to the stripes as weft auxiliary fiber yarns, and a unidirectional reinforcing fiber woven fabric having a basis weight of 200 g / m 2 was produced. The fabric opening ratio of the fabric and the straightness of the carbon fiber yarn were evaluated. The inner diameter of the used mail part of the heald is 18.8 mm. In the resulting woven fabric, the carbon fibers arranged in one direction are straight, and the weft auxiliary fiber yarn and the carbon fiber are bonded and solidified, and the reinforcing fiber woven fabric is sufficiently opened with few voids. there were. In addition, workability was good.
The fabric opening ratio here is a numerical value representing the area of the opening between the carbon fibers per 10 cm × 10 cm of the fabric as a ratio to the area of the 10 cm × 10 cm of the fabric, and light is irradiated from the lower part of the fabric, The transmission of the light through the fabric is image-processed and obtained by the following calculation formula.
Opening ratio = sum of opening area / 100 cm 2 × 100 (%)
Next, the obtained unidirectional reinforcing fiber fabric 1ply was impregnated with XL-800 epoxy resin manufactured by Mitsubishi Plastics Co., Ltd., and a cured plate was prepared by a hand lay-up molding method, in accordance with the CFRP tensile test method of JIS K7073. The tensile strength at break was evaluated. The results are shown in Table 1.
（実施例２）
実施例１と同様な糸使いで目付け３００ｇ／ｍ２の一方向性補強強化繊維織物を製造し、評価した。結果を表1に示す。
本実施例で使用したヘルドの内寸口径幅は１２．５ｍｍである。得られた織物は実施例１で得られた織物より、やや炭素繊維の真直性に欠けるものの、空隙が少なく充分に開繊され外観品位の良い補強強化繊維織物であった。また、作業取り扱い性も良好であった。
(Example 2)
A unidirectional reinforcing and reinforcing fiber woven fabric with a basis weight of 300 g / m 2 was manufactured and evaluated using the same thread as in Example 1. The results are shown in Table 1.
The inner diameter of the heald used in this example is 12.5 mm. The obtained woven fabric was a reinforcing reinforced fiber woven fabric having a good appearance quality with few voids, although it was slightly lacking in the straightness of the carbon fiber as compared with the woven fabric obtained in Example 1. In addition, workability was good.
（比較例１）
炭素繊維（三菱レイヨン株式会社製、パイロフィル（製品名））からなる１２Ｋ（フィラメント本数：１２０００本）のマルチフィラメント糸をたて糸に用い、又、２２．５ｔｅｘのガラス繊維（ユニチカグラスファイバー社製）糸条に熱融着繊維（東レ株式会社製）を付着させた補助繊維をよこ糸補助繊維糸として、平織組織を形成し、目付け２００ｇ／ｍ２の一方向補強繊維織物を製造し、評価した。結果を表1に示す。
(Comparative Example 1)
A 12K (filament number: 12000) multifilament yarn made of carbon fiber (manufactured by Mitsubishi Rayon Co., Ltd., Pyrofil (product name)) is used as the warp yarn, and 22.5 tex glass fiber (manufactured by Unitika Glass Fiber Co., Ltd.) yarn. A plain weave structure was formed using auxiliary fibers with heat-bonding fibers (manufactured by Toray Industries, Inc.) attached to the strips as weft auxiliary fiber yarns, and unidirectional reinforcing fiber fabrics having a basis weight of 200 g / m 2 were produced and evaluated. The results are shown in Table 1.
以上のことから太い炭素繊維糸条を用いて本発明の製織方法で製織することで低目付け織物でありながら目開きが少なく、糸幅が安定した高品質な低目付け織物が低コストで製造することができる。しかも、本発明の一方向性補強繊維織物から得られる繊維強化複合材料は機械物性に於いても現行の土建分野の補強シ−トとして用いられる材料のスペック値である３４００ＭＰａをクリアしており、工業上極めて有用である。 From the above, weaving with the weaving method of the present invention using a thick carbon fiber yarn produces a high-quality, low-weight fabric with a low mesh size and a stable yarn width at a low cost. be able to. Moreover, the fiber reinforced composite material obtained from the unidirectional reinforcing fiber fabric of the present invention has cleared the spec value of 3400 MPa, which is the specification value of the material used as the reinforcing sheet in the current civil engineering field, even in the mechanical properties. It is extremely useful industrially.
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| EP3104224A2 (en) | 2015-06-10 | 2016-12-14 | Shin-Etsu Chemical Co., Ltd. | Method for preparing synthetic quartz glass substrate |
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