JP2012207340A - Carbon fiber sewing thread and method for producing the same - Google Patents

Carbon fiber sewing thread and method for producing the same Download PDF

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JP2012207340A
JP2012207340A JP2011074140A JP2011074140A JP2012207340A JP 2012207340 A JP2012207340 A JP 2012207340A JP 2011074140 A JP2011074140 A JP 2011074140A JP 2011074140 A JP2011074140 A JP 2011074140A JP 2012207340 A JP2012207340 A JP 2012207340A
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yarn
carbon fiber
sewing thread
thread
fiber
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JP5631248B2 (en
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Akihiro Sato
彰洋 佐藤
Hiroyuki Nonaka
宏行 野中
Tetsuya Imamura
哲也 今村
Hiroyasu Nishino
弘泰 西野
Yasuyuki Kishida
泰幸 岸田
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Gunze Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a carbon fiber sewing thread which holds high mechanical strength of carbon fiber and has excellent durability against friction with a pinhole during sewing.SOLUTION: There are provided a carbon fiber sewing thread formed by covering a core yarn obtained by arranging a meltable yarn on a surface of a carbon fiber yarn, with a winding yarn of a synthetic fiber, and a method for producing the same. Preferably the carbon fiber yarn is a pitch-based carbon fiber or a PAN-based carbon fiber. Preferably the core yarn is covered doubly with lower winding and upper winding yarns of a synthetic fiber.

Description

本発明は、炭素繊維縫糸及びその製法に関する。   The present invention relates to a carbon fiber sewing thread and a method for producing the same.

炭素繊維は高い機械的強度を有するため、繊維強化プラスチック(FRP)等の複合材料用の強化材等として広く用いられている。   Since carbon fiber has high mechanical strength, it is widely used as a reinforcing material for composite materials such as fiber reinforced plastic (FRP).

例えば、特許文献1には、マルチフィラメントを束ねた炭素繊維束に掛合糸を巻縫い掛合した炭素繊維束糸、及びこれを織物に形成することが記載されている。   For example, Patent Document 1 describes that a carbon fiber bundle yarn obtained by winding and hooking a hook yarn on a carbon fiber bundle in which multifilaments are bundled and forming this into a woven fabric.

特許文献2には、炭素繊維糸に熱溶融性のカバリング糸を付加した経糸及び/又は緯糸を用いて織物組織を形成する繊維構造体が記載されている。   Patent Document 2 describes a fiber structure that forms a woven fabric structure using warp and / or weft obtained by adding a heat-melting covering yarn to carbon fiber yarn.

特許文献3には、FRP等の繊維強化複合材料の補強材として使用する炭素繊維製織物が記載されている。   Patent Document 3 describes a carbon fiber fabric used as a reinforcing material for fiber reinforced composite materials such as FRP.

特許文献4には、カーボン繊維にナイロン66繊維をS及びZ方向にダブルカバリングし、これを熱処理して得られる糸を、射出成形用品の強化材として用いることが記載されている。   Patent Document 4 describes that a yarn obtained by double-covering nylon 66 fibers in S and Z directions on carbon fibers and heat-treating them is used as a reinforcing material for injection molded articles.

特許文献5には、複数の強化糸条(カーボン繊維)に熱融着性糸条が引き揃えられた複合芯糸条のまわりに、複数のマトリックス糸条によりマトリックスメリヤス編物組織が形成された強化材用シートが記載されている。   Patent Document 5 discloses a reinforcement in which a matrix knit fabric structure is formed by a plurality of matrix yarns around a composite core yarn in which heat-fusible yarns are aligned with a plurality of reinforcing yarns (carbon fibers). A material sheet is described.

特許文献1〜5には、炭素繊維糸をカバリングすることの教示はあるものの、そもそも炭素繊維糸を曲げて使用することは想定されていないため、縫糸として用いることは教示がない。これは、炭素繊維はその繊維軸に対する垂直方向のせん断力や摩擦に脆いという欠点があるため、炭素繊維糸を縫糸に用いることはできないと考えられるからである。実際、複数の炭素繊維フィラメントからなる束を縫糸として用いた場合に、糸道や針穴で擦られると炭素繊維のフィラメントが切れてしまい縫製が不可能となる。   In Patent Documents 1 to 5, although there is a teaching of covering a carbon fiber yarn, it is not assumed that the carbon fiber yarn is bent and used, so there is no teaching of using it as a sewing thread. This is because it is considered that carbon fiber yarn cannot be used as a sewing thread because carbon fiber has a drawback that it is brittle in shearing force and friction in the direction perpendicular to the fiber axis. In fact, when a bundle made of a plurality of carbon fiber filaments is used as a sewing thread, the carbon fiber filaments are cut when rubbed with a thread path or a needle hole, making sewing impossible.

そこで、炭素繊維糸に柔軟性を付与するために、複数の炭素繊維フィラメントの束を芯糸とし、これに巻き糸を巻き付けた芯鞘構造を有する縫糸とすることが考えられる。   Therefore, in order to impart flexibility to the carbon fiber yarn, it is conceivable to use a bundle of a plurality of carbon fiber filaments as a core yarn and a sewing thread having a core-sheath structure in which a wound yarn is wound around the core yarn.

しかし、この芯鞘構造を有する縫糸では、縫製時に針穴との摩擦により鞘糸が移動してしまい炭素繊維糸の芯糸が剥きだしとなるため、結局は糸切れが発生してしまう。そのため、炭素繊維糸を用いた縫糸はこれまで製造することはできない。   However, in the case of the sewing thread having this core-sheath structure, the sheath thread moves due to friction with the needle hole at the time of sewing, and the core thread of the carbon fiber thread is peeled off, which eventually causes thread breakage. Therefore, a sewing thread using carbon fiber thread cannot be manufactured so far.

特開2008−291372号公報JP 2008-291372 A 特開2003−96643号公報JP 2003-96643 A 特開2002−13040号公報JP 2002-13040 A 特開平1−292132号公報JP-A-1-292132 特公平7−49614号公報Japanese Examined Patent Publication No. 7-49614

本発明は、炭素繊維が持つ高い機械的強度を保持し、かつ縫製時における針穴との摩擦に対し優れた耐久性を有する炭素繊維縫糸を提供することを目的とする。   An object of the present invention is to provide a carbon fiber sewing thread that retains the high mechanical strength of carbon fiber and has excellent durability against friction with a needle hole during sewing.

本発明者らは、上記課題を達成すべく鋭意研究を重ねた結果、炭素繊維を平行に引き揃えた炭素繊維糸に低融点ナイロン糸を当該炭素繊維方向に引き揃えてなる芯糸に、下巻き糸及び上巻き糸をカバリングしてダブルカバードヤーンを製造し、これを加熱処理して得られる縫糸が、上記の課題を解決できることを見出した。かかる知見に基づきさらに研究を重ねた結果、本発明を完成するに至った。   As a result of intensive studies to achieve the above-mentioned problems, the inventors of the present invention have developed a core yarn in which a low melting point nylon yarn is aligned in the carbon fiber direction and a carbon fiber yarn in which carbon fibers are aligned in parallel. It has been found that a sewing thread obtained by covering a wound thread and an upper wound thread to produce a double covered yarn and subjecting it to a heat treatment can solve the above problems. As a result of further research based on this knowledge, the present invention has been completed.

本発明は、下記の縫糸及びその製造方法を提供する。   The present invention provides the following sewing thread and manufacturing method thereof.

項1.炭素繊維糸の表面に溶融糸を引き揃えてなる芯糸が合成繊維の巻き糸でカバリングされてなる炭素繊維縫糸。   Item 1. A carbon fiber sewing thread in which a core yarn obtained by aligning molten yarn on the surface of a carbon fiber yarn is covered with a synthetic fiber winding yarn.

項2.前記炭素繊維がピッチ系炭素繊維又はPAN系の炭素繊維である項1に記載の炭素繊維縫糸。   Item 2. Item 2. The carbon fiber sewing thread according to Item 1, wherein the carbon fiber is a pitch-based carbon fiber or a PAN-based carbon fiber.

項3.前記芯糸が、合成繊維の下巻き糸及び上巻き糸でダブルカバリングされてなる項1又は2に記載の炭素繊維縫糸。   Item 3. Item 3. The carbon fiber sewing thread according to item 1 or 2, wherein the core yarn is double-covered with a synthetic fiber lower wound yarn and upper wound yarn.

項4.前記芯糸が、炭素繊維糸が露出しない程度に、合成繊維の下巻き糸及び上巻き糸でダブルカバリングされてなる項1、2又は3に記載の炭素繊維縫糸。   Item 4. Item 4. The carbon fiber sewing thread according to item 1, 2 or 3, wherein the core yarn is double-covered with a lower winding yarn and an upper winding yarn of a synthetic fiber to such an extent that the carbon fiber yarn is not exposed.

項5.前記溶融糸が炭素繊維糸及び合成繊維の下巻き糸に接している項3又は4に記載の炭素繊維縫糸。   Item 5. Item 5. The carbon fiber sewing thread according to item 3 or 4, wherein the molten yarn is in contact with the lower winding yarn of the carbon fiber yarn and the synthetic fiber.

項6.前記溶融糸が低融点ポリアミド糸である項1〜5のいずれかに記載の炭素繊維縫糸。   Item 6. Item 6. The carbon fiber sewing thread according to any one of Items 1 to 5, wherein the molten yarn is a low-melting polyamide yarn.

項7.前記合成繊維がポリアミドである項1〜5のいずれかに記載の炭素繊維縫糸。   Item 7. Item 6. The carbon fiber sewing thread according to any one of Items 1 to 5, wherein the synthetic fiber is polyamide.

項8.炭素繊維縫糸の製造方法であって、炭素繊維糸に溶融糸を引き揃えて芯糸とし、この芯糸を合成繊維の巻き糸でカバリングした後、加熱処理することを特徴とする製造方法。   Item 8. A method for producing a carbon fiber sewing thread, wherein a melt yarn is aligned with a carbon fiber yarn to form a core yarn, and the core yarn is covered with a wound yarn of synthetic fiber and then heat treated.

本発明の炭素繊維縫糸は、炭素繊維糸の表面に溶融糸を引き揃えた芯糸を合成繊維の巻き糸(鞘糸)でカバリングした後、加熱処理することにより製造される。これにより、炭素繊維縫糸に縫製に適した柔軟性が付与されるとともに、炭素繊維糸と合成繊維の巻き糸(鞘糸)とが溶融糸で固定されるため縫製時の摩耗により鞘糸がずれることが防止される。   The carbon fiber sewing thread of the present invention is manufactured by covering a core yarn obtained by aligning molten yarn on the surface of the carbon fiber yarn with a wound yarn (sheath yarn) of a synthetic fiber and then heat-treating it. As a result, flexibility suitable for sewing is imparted to the carbon fiber sewing thread, and the carbon fiber thread and the synthetic fiber winding thread (sheath thread) are fixed by the molten thread, so that the sheath thread is displaced due to wear during sewing. It is prevented.

また、炭素繊維糸が露出しない程度の撚り数で、合成繊維糸で芯糸をカバリングすることにより、炭素繊維糸の破損を防止することができる。   Moreover, damage of the carbon fiber yarn can be prevented by covering the core yarn with the synthetic fiber yarn with a twist number such that the carbon fiber yarn is not exposed.

(1)実施例1、(2)比較例1、(3)比較例2、及び(4)比較例3で製造された炭素繊維縫糸の模式図である。(1) It is a schematic diagram of the carbon fiber sewing thread manufactured in Example 1, (2) Comparative Example 1, (3) Comparative Example 2, and (4) Comparative Example 3. 実施例1で得られた炭素繊維縫糸の断面の模式図である。1 is a schematic view of a cross section of a carbon fiber sewing thread obtained in Example 1. FIG. (1)実施例1及び(2)比較例1で製造された炭素繊維縫糸を用いて縫製試験を行った時の縫糸の状態を示す写真である。(1) It is a photograph which shows the state of a sewing thread when performing a sewing test using the carbon fiber sewing thread manufactured in Example 1 and (2) Comparative Example 1. (3)比較例2及び(4)比較例3で製造された炭素繊維縫糸を用いて縫製試験を行った時の縫糸の状態を示す写真である。(3) It is a photograph which shows the state of a sewing thread when a sewing test was done using the carbon fiber sewing thread manufactured in Comparative Example 2 and (4) Comparative Example 3.

本発明は、炭素繊維糸の表面に溶融糸を引き揃えてなる芯糸を、合成繊維の巻き糸でカバリングしてなる炭素繊維縫糸、及びその製法を提供する。   The present invention provides a carbon fiber sewing thread obtained by covering a core thread obtained by aligning molten yarn on the surface of a carbon fiber thread with a synthetic fiber winding thread, and a method for producing the same.

炭素繊維糸を構成する炭素繊維としては、例えばピッチ系炭素繊維、PAN系の炭素繊維等が挙げられる。炭素繊維糸の具体例としては、PAN系炭素繊維糸トレカ(登録商標)T300−3000(東レ株式会社製)、パイロフィル(登録商標)HTシリーズTR30S3L(三菱レイヨン株式会社製)等が挙げられる。   Examples of the carbon fibers constituting the carbon fiber yarn include pitch-based carbon fibers and PAN-based carbon fibers. Specific examples of the carbon fiber yarn include PAN-based carbon fiber yarn trading card (registered trademark) T300-3000 (manufactured by Toray Industries, Inc.), Pyrofil (registered trademark) HT series TR30S3L (manufactured by Mitsubishi Rayon Co., Ltd.), and the like.

炭素繊維糸のフィラメント数は、通常1000〜24000フィラメント、好ましくは1000〜3000フィラメントの範囲である。炭素繊維糸の単繊維1本当たりの太さは、通常、4〜20μm、好ましくは5〜10μmの範囲である。炭素繊維糸全体の太さは、通常、60〜1700テックス、好ましくは60〜400テックスの範囲である。   The number of filaments of the carbon fiber yarn is usually in the range of 1000 to 24000 filaments, preferably 1000 to 3000 filaments. The thickness per single fiber of the carbon fiber yarn is usually in the range of 4 to 20 μm, preferably 5 to 10 μm. The total thickness of the carbon fiber yarn is usually in the range of 60 to 1700 tex, preferably 60 to 400 tex.

炭素繊維糸の表面に引き揃えられる溶融糸としては、低融点の樹脂からなる糸であり、本発明の縫糸の製造工程において加熱処理により溶融して芯糸と巻き糸を融着できるものであれば特に限定はない。例えば、巻き糸に使用する合成繊維の融点よりも20℃以下、さらに30℃以下の融点を有する合成繊維を溶融糸として使用することができ、好ましくは低融点ポリアミド糸、低融点ポリエステル系繊維糸(低融点ポリエステル共重合体繊維糸、低融点脂肪族ポリエステル繊維糸)、ポリウレタン系合成繊維糸等が挙げられる。低融点とは、通常、融点が60〜200℃、好ましくは100〜130℃程度、さらに好ましくは110〜120℃程度を意味する。   The melted yarn that is aligned on the surface of the carbon fiber yarn is a yarn made of a resin having a low melting point, and can be melted by heat treatment in the manufacturing process of the sewing thread of the present invention to fuse the core yarn and the wound yarn. There is no particular limitation. For example, a synthetic fiber having a melting point of 20 ° C. or lower and further 30 ° C. or lower than the melting point of the synthetic fiber used for the wound yarn can be used as the molten yarn, preferably a low-melting polyamide yarn or a low-melting polyester fiber yarn (Low-melting point polyester copolymer fiber yarn, low-melting point aliphatic polyester fiber yarn), polyurethane synthetic fiber yarn and the like. The low melting point usually means that the melting point is 60 to 200 ° C, preferably about 100 to 130 ° C, more preferably about 110 to 120 ° C.

前記低融点ポリアミド糸を構成するポリアミドとしては、例えば、ナイロン6、66、610、11、12等が挙げられ、これらより選ばれた1種又は2種以上を選択することができる。また、上記のポリアミドを2種類以上含む共重合体等が挙げられる。好ましくはナイロン6である。低融点ポリアミド糸の具体例としては、ジョイナーLタイプ 30デニール(フジボウ小坂井株式会社製)、エルダー33dt−1−G100(東レ株式会社)等が挙げられる。   Examples of the polyamide constituting the low melting point polyamide yarn include nylon 6, 66, 610, 11, 12, and the like, and one or more selected from these can be selected. Moreover, the copolymer etc. which contain 2 or more types of said polyamide are mentioned. Nylon 6 is preferable. Specific examples of the low melting point polyamide yarn include Joiner L type 30 denier (manufactured by Fujibo Kozakai Co., Ltd.), Elder 33dt-1-G100 (Toray Industries, Inc.) and the like.

前記低融点ポリエステル共重合体繊維糸を構成する低融点ポリエステル共重合体の好ましい共重合成分としては、グリコール酸、3−ヒドロキシ酪酸、4−ヒドロキシ酪酸、4−ヒドロキシ吉草酸、6−ヒドロキシカプロン酸等のヒドロキシカルボン酸類の他、エチレングリコール、プロピレングリコール、ブタンジオール、ネオペンチルグリコール、ポリエチレングリコール、グリセリン、ペンタエリスリトール等の分子内に複数の水酸基を含有する化合物類またはそれらの誘導体、アジピン酸、セバシン酸、フマル酸、テレフタル酸、イソフタル酸、2,6−ナフタレンジカルボン酸、5−ナトリウムスルホイソフタル酸、5−テトラブチルホスホニウムイソフタル酸、5−テトラブチルホスホニウムイソフタル酸等の分子内に複数のカルボン酸基を含有する化合物類またはそれらの誘導体が挙げられる。   Preferred copolymer components of the low melting point polyester copolymer constituting the low melting point polyester copolymer fiber yarn include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, and 6-hydroxycaproic acid. In addition to hydroxycarboxylic acids such as ethylene glycol, propylene glycol, butanediol, neopentyl glycol, polyethylene glycol, glycerin, pentaerythritol, etc., compounds containing a plurality of hydroxyl groups in the molecule or derivatives thereof, adipic acid, sebacin Multiple molecules in the molecule such as acid, fumaric acid, terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid, 5-tetrabutylphosphonium isophthalic acid, 5-tetrabutylphosphonium isophthalic acid, etc. Compounds or derivatives thereof containing carbon acid group.

前記低融点脂肪族ポリエステル繊維糸を構成する低融点脂肪族ポリエステルとしては、例えば、ポリ乳酸、ポリグリコール酸、ポリ−3−ヒドロキシプロピオネート、ポリ−3−ヒドロキシブチレート、ポリ−3−ヒドロキシブチレートバリレート、ポリカプロラクトン等が挙げられる。   Examples of the low melting point aliphatic polyester constituting the low melting point aliphatic polyester fiber yarn include polylactic acid, polyglycolic acid, poly-3-hydroxypropionate, poly-3-hydroxybutyrate, and poly-3-hydroxy. Examples include butyrate valerate and polycaprolactone.

溶融糸のフィラメント数は、通常1〜15、好ましくは1〜5の範囲である。溶融糸の単繊維1本当たりの太さは、通常、2〜35デニール(2.22〜38.85デシテックス)、好ましくは3〜30デニール(3.3〜33.3デシテックス)の範囲である。溶融糸全体の太さは、通常、10〜60デニール(11.1〜66.6デシテックス)、好ましくは15〜40デニール(16.65〜44.4デシテックス)の範囲である。   The number of filaments of the molten yarn is usually in the range of 1 to 15, preferably 1 to 5. The thickness per single fiber of the molten yarn is usually in the range of 2 to 35 denier (2.22 to 38.85 dtex), preferably 3 to 30 denier (3.3 to 33.3 dtex). . The total thickness of the molten yarn is usually in the range of 10 to 60 denier (11.1 to 66.6 dtex), preferably 15 to 40 denier (16.65 to 44.4 dtex).

炭素繊維糸の表面への溶融糸の引き揃えは、炭素繊維糸の表面全体ではなく、表面の一部に行うことが好ましい。溶融糸は、後述する加熱処理により、炭素繊維糸及び合成繊維の巻き糸(鞘糸)を接着する働きを有するが、必ずしも炭素繊維糸の表面全体で合成繊維糸と接着させる必要はなく、むしろ表面全体を接着すると得られる縫糸の柔軟性(フレキシブル性)が損なわれる傾向がある。そのため、炭素繊維糸の表面の一部に溶融糸の引き揃えを行うことが好ましい。このような形態であれば、溶融糸を炭素繊維糸の方向に直線状に引き揃える(例えば、実施例1、図1(1))、溶融糸を炭素繊維糸の表面にスパイラル状に巻き付ける等任意の方法が採用される。   The alignment of the molten yarn to the surface of the carbon fiber yarn is preferably performed not on the entire surface of the carbon fiber yarn but on a part of the surface. The melted yarn has a function of adhering the carbon fiber yarn and the wound yarn (sheath yarn) of the synthetic fiber by the heat treatment described later, but it is not always necessary to adhere the synthetic fiber yarn over the entire surface of the carbon fiber yarn. When the entire surface is bonded, the flexibility (flexibility) of the sewing thread obtained tends to be impaired. Therefore, it is preferable to align the molten yarn on a part of the surface of the carbon fiber yarn. If it is such a form, a melted yarn will be straightly arranged in the direction of a carbon fiber yarn (for example, Example 1, Drawing 1 (1)), a melted yarn will be wound around the surface of a carbon fiber yarn spirally, etc. Any method is adopted.

ついで、炭素繊維糸の表面に溶融糸を引き揃えてなる芯糸を、合成繊維の巻き糸でカバリングする。合成繊維糸としては、ポリアミド繊維糸やポリエステル系繊維糸などが挙げられ、好ましくはナイロン66、6等のナイロン糸が挙げられる。合成繊維糸の具体例としては、プロミラン350T−72f−1781(東レ株式会社製)等が挙げられる。   Next, the core yarn formed by aligning the molten yarn on the surface of the carbon fiber yarn is covered with a synthetic yarn winding yarn. Synthetic fiber yarns include polyamide fiber yarns and polyester fiber yarns, preferably nylon yarns such as nylon 66 and 6. Specific examples of the synthetic fiber yarn include Promiran 350T-72f-1781 (manufactured by Toray Industries, Inc.).

合成繊維糸のフィラメント数は、通常30〜150、好ましくは30〜100の範囲である。合成繊維糸の単繊維1本当たりの太さは、通常、0.5〜30デニール(0.555〜33.3デシテックス)、好ましくは1〜10デニール(1.11〜11.1デシテックス)の範囲である。合成繊維糸全体の太さは、通常、70〜700デニール(77.7〜777デシテックス)、好ましくは150〜500デニール(166.5〜555デシテックス)の範囲である。   The number of filaments of the synthetic fiber yarn is usually in the range of 30 to 150, preferably 30 to 100. The thickness per single fiber of the synthetic fiber yarn is usually 0.5 to 30 denier (0.555 to 33.3 dtex), preferably 1 to 10 denier (1.11 to 11.1 dtex). It is a range. The total thickness of the synthetic fiber yarn is usually in the range of 70 to 700 denier (77.7 to 777 dtex), preferably 150 to 500 denier (166.5 to 555 dtex).

合成繊維の巻き糸によるカバリングは、シングルカバリング、ダブルカバリングのいずれでもよく、炭素繊維糸が露出しない程度に合成繊維の巻き糸で芯糸をカバリングすることが好ましい。特に、ダブルカバリングが好ましく、この場合芯糸に対して合成繊維の下巻き糸及び上巻き糸の順でカバリングされる。この場合も、炭素繊維糸が露出しない程度に、合成繊維の下巻き糸及び上巻き糸でカバリングされていることが好ましい。例えば、芯糸を、下巻き糸を用いてS方向に200〜1000回/m、好ましくは500〜700回/mの巻き数でカバリングし、さらに上巻き糸を用いてZ方向に200〜1000回/m、好ましくは500〜700回/mの巻き数でカバリングすることが好ましい。   The covering by the synthetic fiber winding may be either single covering or double covering, and it is preferable to cover the core yarn with the synthetic fiber winding so that the carbon fiber yarn is not exposed. In particular, double covering is preferable. In this case, covering is performed in the order of the lower winding yarn and the upper winding yarn of the synthetic fiber with respect to the core yarn. Also in this case, it is preferable that the synthetic fiber is covered with the lower winding yarn and the upper winding yarn so that the carbon fiber yarn is not exposed. For example, the core yarn is covered at a winding number of 200 to 1000 turns / m, preferably 500 to 700 turns / m in the S direction using the lower winding thread, and further 200 to 1000 in the Z direction using the upper winding thread. It is preferable to cover at a winding number of 500 to 700 times / m, preferably 500 to 700 times / m.

得られたカバリングヤーンを加熱処理する。加熱処理は、通常、90〜120℃程度で、10〜40分程度で実施することができる。この加熱処理により溶融糸が溶融して炭素繊維糸及び合成繊維の巻き糸を強固に接着することができ、得られた炭素繊維縫糸の鞘糸に相当する合成繊維糸のずれを効果的に防止することができる。なお、上述したように、溶融糸は炭素繊維糸の表面の一部に引き揃えられていることが好ましく、これにより炭素繊維縫糸の柔軟性を保持したまま鞘糸のずれを防止することができる。   The obtained covering yarn is heat-treated. The heat treatment is usually about 90 to 120 ° C. and can be performed in about 10 to 40 minutes. This heat treatment melts the molten yarn and allows the carbon fiber yarn and the synthetic fiber wound yarn to be firmly bonded to each other, effectively preventing deviation of the synthetic fiber yarn corresponding to the sheath yarn of the obtained carbon fiber sewing thread. can do. As described above, it is preferable that the molten yarn is aligned with a part of the surface of the carbon fiber yarn, thereby preventing the deviation of the sheath yarn while maintaining the flexibility of the carbon fiber sewing yarn. .

最後に、炭素繊維縫糸を油剤処理することにより縫糸を得る。油剤処理は常法により行うことができる。得られた炭素繊維縫糸の断面は、例えば、図2のような形態を有している。   Finally, the carbon fiber sewing thread is treated with an oil agent to obtain a sewing thread. The oil agent treatment can be performed by a conventional method. The cross section of the obtained carbon fiber sewing thread has, for example, a form as shown in FIG.

本発明の炭素繊維縫糸は、炭素繊維糸が合成繊維の巻き糸でカバリングされているため柔軟性に優れており、縫糸として適している。また、炭素繊維糸の表面(好ましくは表面の一部)に引き揃えられた溶融糸を有しているため、炭素繊維糸及び合成繊維の巻き糸の密着性に優れ縫製時の巻き糸のズレを効果的に抑制できる。   The carbon fiber thread of the present invention is excellent in flexibility because the carbon fiber thread is covered with a synthetic fiber winding thread, and is suitable as a sewing thread. In addition, since the melted yarn is aligned on the surface (preferably part of the surface) of the carbon fiber yarn, the adhesiveness of the carbon fiber yarn and the synthetic fiber is excellent, and the winding yarn is misaligned during sewing. Can be effectively suppressed.

次に、本発明を具体的に説明するが、本発明はこれに限定されるものではない。   Next, the present invention will be specifically described, but the present invention is not limited thereto.

実施例1
PAN系炭素繊維糸トレカ(登録商標)(T300-3K、198テックス、3000フィラメント、東レ株式会社製)を炭素繊維糸とし、低融点ナイロン糸(ジョイナーLタイプ、30デニール(約33デシテックス)、5フィラメント、フジボウ小坂井株式会社製)を引き揃え糸にして芯糸1とした。
Example 1
PAN-based carbon fiber yarn trading card (registered trademark) (T300-3K, 198 tex, 3000 filament, manufactured by Toray Industries, Inc.) is used as a carbon fiber yarn. The core yarn 1 was made by using a filament, Fujibo Kozakai Co., Ltd.) as an aligned yarn.

次に、芯糸1に、下巻き糸としてナイロン66繊維糸(プロミラン350T−72f−1781、350デシテックス、72フィラメント、東レ株式会社製)を用いて、S方向に700回/mの巻き数でカバリングし、さらに上巻き糸としてナイロン66繊維糸(プロミラン350T−72f−1781、350デシテックス、72フィラメント、東レ株式会社製)を用いて、Z方向に700回/mの巻き数でカバリングし、ダブルカバードヤーン1を得た。   Next, nylon 66 fiber yarn (Promiran 350T-72f-1781, 350 dtex, 72 filament, manufactured by Toray Industries, Inc.) is used as the lower winding yarn for the core yarn 1, and the number of turns is 700 turns / m in the S direction. Covering, further using nylon 66 fiber yarn (Promiran 350T-72f-1781, 350 dtex, 72 filament, manufactured by Toray Industries, Inc.) as the upper winding yarn, covering it in the Z direction at a winding number of 700 turns / m, and double Covered yarn 1 was obtained.

ダブルカバードヤーン1を110℃の恒温槽内で30分の加熱処理を行った後、常法により油剤処理を行い、炭素繊維縫糸1を得た。   The double covered yarn 1 was subjected to a heat treatment for 30 minutes in a constant temperature bath at 110 ° C., and then treated with an oil agent by a conventional method to obtain a carbon fiber sewing thread 1.

比較例1
PAN系炭素繊維糸トレカ(登録商標)(198テックス、3000フィラメント、東レ株式会社製)を炭素繊維糸とし、引き揃え糸なしで芯糸2とした。
Comparative Example 1
PAN-based carbon fiber yarn trading card (registered trademark) (198 tex, 3000 filament, manufactured by Toray Industries, Inc.) was used as the carbon fiber yarn, and the core yarn 2 was formed without the draw yarn.

芯糸2を用い、ダブルカバードヤーンの熱処理を行わない以外は、実施例1と同様にして炭素繊維縫糸2を得た。   A carbon fiber sewing thread 2 was obtained in the same manner as in Example 1 except that the core yarn 2 was used and the double-covered yarn was not heat-treated.

比較例2
比較例1の芯糸2を用い、下巻き糸としてナイロン66繊維糸に代えて低融点ナイロン糸(ジョイナーLタイプ、30デニール(約33デシテックス)、5フィラメント、フジボウ小坂井株式会社製)を用いる以外は、実施例1と同様にして炭素繊維縫糸3を得た
Comparative Example 2
The core yarn 2 of Comparative Example 1 was used, and a low melting point nylon yarn (Joiner L type, 30 denier (about 33 dtex), 5 filament, manufactured by Fujibow Kosakai Co., Ltd.) was used instead of the nylon 66 fiber yarn as the lower winding yarn. Obtained the carbon fiber sewing thread 3 in the same manner as in Example 1.

比較例3
PAN系炭素繊維糸トレカ(登録商標)(T300-3K、198テックス、3000フィラメント、東レ株式会社製)に実施例1と同様の油剤処理を行い、炭素繊維縫糸4を得た。
Comparative Example 3
PAN-based carbon fiber yarn trading card (registered trademark) (T300-3K, 198 tex, 3000 filament, manufactured by Toray Industries, Inc.) was treated with the same oil agent as in Example 1 to obtain a carbon fiber sewing thread 4.

試験例1
実施例1及び比較例1〜3で得られた炭素繊維縫糸について、柔軟性、芯糸露出防止性及び縫製試験を評価した。
Test example 1
The carbon fiber sewing threads obtained in Example 1 and Comparative Examples 1 to 3 were evaluated for flexibility, core thread exposure prevention and sewing test.

<可縫性>
可縫性の評価は、得られた炭素繊維縫糸を1本針本縫い直線縫製150mmХ5回を行ったときの不具合の個数として評価した。不具合とは、縫製中における、縫目の糸切れ・目飛び・目調子不良・スナールの発生を意味し、不具合の個数とは、これらの不具合の総計を個数で表したものを意味する。評価基準を以下に示す。
<Sewability>
The evaluation of the sewability was evaluated as the number of defects when the obtained carbon fiber sewing thread was subjected to a single-needle, main-stitch linear sewing 150 mm1505 times. A defect means occurrence of thread breakage, stitch skipping, poor stitch condition, and snare during sewing, and the number of defects means a total of these defects expressed in number. The evaluation criteria are shown below.

○:不具合の個数 0個
△:不具合の個数 1〜3個
×:不具合の個数 4個以上
○: Number of defects 0 △: Number of defects 1 to 3 ×: Number of defects 4 or more

<芯糸露出の防止性>
芯糸露出の防止性の評価は、縫製中においてミシン針穴との摩擦により鞘糸が移動して、芯糸のフィラメント切れの発生により縫糸が切断した個数で評価した。評価基準を以下に示す。
<Prevention of core yarn exposure>
The evaluation of the prevention of the core thread exposure was evaluated by the number of pieces of the sewing thread cut by the occurrence of filament breakage of the core thread due to the movement of the sheath thread due to friction with the sewing machine needle hole during sewing. The evaluation criteria are shown below.

○:縫目の糸切れ個数 0個
△:縫目の糸切れ個数 1〜3個
×:縫目の糸切れ個数 4個以上
○: Number of thread breakage at seam 0 △: Number of thread breakage at seam 1 to 3 ×: Number of thread breakage at seam 4 or more

<縫製試験>
使用ミシン:三菱電機株式会社製1本針総合送りミシンDY−253
使用針:オルガン針株式会社製DD×2 #28
使用下糸:グンゼ株式会社製コア―ミシン糸#4
により、各試験糸を上糸に使用し、5mmピッチで炭素繊維織物を本縫いした時の状況を観察・評価した。
<Sewing test>
Used sewing machine: One-needle general feed sewing machine DY-253 manufactured by Mitsubishi Electric Corporation
Used needle: Organ Needle DD × 2 # 28
Lower thread: Core-sewing thread # 4 made by Gunze Co., Ltd.
Thus, each test yarn was used as an upper yarn, and the situation when the carbon fiber fabric was sewn at a pitch of 5 mm was observed and evaluated.

各炭素繊維縫糸を用いて縫製した後の縫糸の形状を図1に示す。   The shape of the sewing thread after sewing using each carbon fiber sewing thread is shown in FIG.

Figure 2012207340
Figure 2012207340

Claims (8)

炭素繊維糸の表面に溶融糸を引き揃えてなる芯糸が合成繊維の巻き糸でカバリングされてなる炭素繊維縫糸。 A carbon fiber sewing thread in which a core yarn obtained by aligning molten yarn on the surface of a carbon fiber yarn is covered with a synthetic fiber winding yarn. 前記炭素繊維がピッチ系炭素繊維又はPAN系の炭素繊維である請求項1に記載の炭素繊維縫糸。 The carbon fiber sewing thread according to claim 1, wherein the carbon fiber is pitch-based carbon fiber or PAN-based carbon fiber. 前記芯糸が、合成繊維の下巻き糸及び上巻き糸でダブルカバリングされてなる請求項1又は2に記載の炭素繊維縫糸。 The carbon fiber sewing thread according to claim 1 or 2, wherein the core thread is double-covered with a lower winding thread and an upper winding thread of a synthetic fiber. 前記芯糸が、炭素繊維糸が露出しない程度に、合成繊維の下巻き糸及び上巻き糸でダブルカバリングされてなる請求項1、2又は3に記載の炭素繊維縫糸。 4. The carbon fiber sewing thread according to claim 1, wherein the core yarn is double-covered with a lower winding yarn and an upper winding yarn of a synthetic fiber to such an extent that the carbon fiber yarn is not exposed. 前記溶融糸が炭素繊維糸及び合成繊維の下巻き糸に接している請求項3又は4に記載の炭素繊維縫糸。 The carbon fiber sewing thread according to claim 3 or 4, wherein the molten yarn is in contact with a carbon fiber thread and a lower wound thread of a synthetic fiber. 前記溶融糸が低融点ポリアミド糸である請求項1〜5のいずれかに記載の炭素繊維縫糸。 The carbon fiber sewing thread according to any one of claims 1 to 5, wherein the molten yarn is a low-melting polyamide yarn. 前記合成繊維がポリアミドである請求項1〜5のいずれかに記載の炭素繊維縫糸。 The carbon fiber sewing thread according to any one of claims 1 to 5, wherein the synthetic fiber is polyamide. 炭素繊維縫糸の製造方法であって、炭素繊維糸に溶融糸を引き揃えて芯糸とし、この芯糸を合成繊維の巻き糸でカバリングした後、加熱処理することを特徴とする製造方法。 A method for producing a carbon fiber sewing thread, wherein a melt yarn is aligned with a carbon fiber yarn to form a core yarn, and the core yarn is covered with a wound yarn of synthetic fiber and then heat treated.
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JP2016061001A (en) * 2014-09-22 2016-04-25 岡本株式会社 Composite yarn and method for producing composite yarn
JPWO2017130545A1 (en) * 2016-01-25 2019-01-17 聡 備酒 Knitted fabric and gloves with tough yarn, cut resistance

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JPH02210036A (en) * 1989-02-09 1990-08-21 Gunze Ltd Conjugated yarn for reinforcement
JP2012197528A (en) * 2011-03-21 2012-10-18 Gunze Ltd Silicon carbide-based fiber sewing thread and method for manufacturing silicon carbide-based fiber sewing thread

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WO1990002831A1 (en) * 1988-09-02 1990-03-22 Teijin Limited Sheet for reinforcing material
JPH02133632A (en) * 1988-11-10 1990-05-22 Toray Ind Inc Sewing yarn for forming preform material for reinforcing resin
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016061001A (en) * 2014-09-22 2016-04-25 岡本株式会社 Composite yarn and method for producing composite yarn
JPWO2017130545A1 (en) * 2016-01-25 2019-01-17 聡 備酒 Knitted fabric and gloves with tough yarn, cut resistance

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