JPWO2005103353A1 - High-strength check yarn and manufacturing method thereof - Google Patents
High-strength check yarn and manufacturing method thereof Download PDFInfo
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- JPWO2005103353A1 JPWO2005103353A1 JP2006512658A JP2006512658A JPWO2005103353A1 JP WO2005103353 A1 JPWO2005103353 A1 JP WO2005103353A1 JP 2006512658 A JP2006512658 A JP 2006512658A JP 2006512658 A JP2006512658 A JP 2006512658A JP WO2005103353 A1 JPWO2005103353 A1 JP WO2005103353A1
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
- D01G1/06—Converting tows to slivers or yarns, e.g. in direct spinning
- D01G1/08—Converting tows to slivers or yarns, e.g. in direct spinning by stretching or abrading
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- Physics & Mathematics (AREA)
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- Preliminary Treatment Of Fibers (AREA)
Abstract
ポリパラフェニレンテレフタルアミド、ポリパラフェニレンベンゾオキサゾール、ポリエチレン、ポリビニルアルコールおよび全芳香族ポリエステルからなる群から選択される少なくとも一種のポリマーからなり、その強度が１４ｃＮ／ｄｔｅｘ以上の高強力短繊維から構成される牽切加工糸であって、該高強力短繊維の平均単糸長が５０〜９０ｃｍであり、且つ平均単糸長の変動係数（ＣＶ）が５０％以下である。It consists of at least one polymer selected from the group consisting of polyparaphenylene terephthalamide, polyparaphenylene benzoxazole, polyethylene, polyvinyl alcohol and wholly aromatic polyester, and is composed of high strength short fibers having a strength of 14 cN / dtex or more. The average single yarn length of the high-strength short fibers is 50 to 90 cm, and the coefficient of variation (CV) of the average single yarn length is 50% or less.
Description
本発明は、牽切加工糸およびその製造方法に関するものである。さらに詳しくは、原糸の強力維持率が高く、且つ、強力のばらつきが少ない牽切加工糸および該牽切加工糸を安定して生産することが可能な製造方法に関するものである。 The present invention relates to a check thread and a manufacturing method thereof. More specifically, the present invention relates to a check-processed yarn having a high strength maintenance ratio of raw yarns and little variation in strength, and a manufacturing method capable of stably producing the check-processed yarn.
パラ型全芳香族ポリアミド繊維に代表される高強力繊維は、高耐熱性である上、耐切創性も高いため、衣料用途分野では紡績糸として防護衣料用途へ展開されている。しかしながら、従来の高強力繊維を用いた紡績糸は、加工前の原糸に比べて加工糸の強度が著しく小さく（強度維持率が低い）、また紡績糸特有の表面毛羽が多いという欠点がある。そのため、高強力でかつ表面毛羽の少ない紡績糸を必要とする用途への展開は困難であった。
通常紡績糸の強力は、該紡績糸を構成する単糸（原糸）の強力と、単糸の平均糸長に比例する。しかし、原糸の強力を上げるには限界があるため、構成単糸の平均糸長を長くして原糸の強度維持率を高くすることが好適とされているが、従来の紡績糸においては、一般的に単糸長は１００ｍｍ以下であり、このような短繊維から構成される紡績糸の強度維持率は高くても５０％以下となる。
しかしながら、これ以上長い単糸（短繊維）を用いることは、紡績糸の製造上困難となるだけでなく、単に単糸長を長くしただけでは高強力繊維特有の剛直性が発現し、均一に配向させることができなくなるため、強度維持率は却って低くなるという問題がある。
このような問題を解決するため、特公平１−１６９３２号公報には、連続糸条を引き千切り方式にて短繊維化し、平均単糸長が１３０〜６００ｍｍの繊維からなる、抱合性が付与された全芳香族ポリアミド紡績糸様糸条が提案されている。しかしながら、本発明者らの研究によれば、上記公報に記載されている条件で、例えばポリパラフェニレンテレフタルアミド繊維の紡績糸様糸条を製造しようとすると、強度維持率および表面毛羽数が変動しやすいという問題があることが判明した。すなわち、全芳香族ポリアミド繊維としてポリパラフェニレンテレフタルアミド繊維を使用した場合には、牽切加工する際に、単糸同士の摩擦により発生した静電気によりトウが著しく広がり、さらにこれがローラー上で乱れるため、均一に牽切することが困難となる。その結果、単糸長の変動が大きくなって強度維持率が小さくなるため、高強力繊維を用いても該加工糸の強度は低下し、強度のばらつきも大きくなり、さらには表面毛羽も著しく増加するという問題が発生する。
上記の強度維持率低下の問題は平均単糸長を長くすれば改善されるが、そのためには牽切長を長くすることが必要となり、ローラー間でトウがさらに広がりやすくなって供給ローラーや牽切ローラーへ巻きつきやすくなるという問題が発生し、安定に牽切加工することは困難となる。
このように、ポリパラフェニレンテレフタルアミド繊維のような、単糸同士の摩擦により静電気の発生し易い繊維を用いて、平均単糸長が長く、かつその単糸長のばらつきが小さい高品位な高強力牽切加工糸およびその製造方法は未だ提案されていないのが実情である。High-strength fibers typified by para-type wholly aromatic polyamide fibers are not only highly heat-resistant but also have high cut resistance. Therefore, they are being developed as spun yarns for protective clothing in the clothing field. However, the conventional spun yarn using high-strength fibers has the disadvantages that the strength of the processed yarn is remarkably small (low strength maintenance rate) compared to the raw yarn before processing, and there are many surface fluff peculiar to the spun yarn. . For this reason, it has been difficult to develop into applications that require spun yarn with high strength and low surface fluff.
Usually, the strength of the spun yarn is proportional to the strength of the single yarn (original yarn) constituting the spun yarn and the average yarn length of the single yarn. However, since there is a limit to increasing the strength of the raw yarn, it is preferable to increase the average yarn length of the constituent single yarn to increase the strength maintenance rate of the raw yarn. Generally, the single yarn length is 100 mm or less, and the strength maintenance rate of spun yarn composed of such short fibers is at most 50% or less.
However, using a single yarn (short fiber) longer than this not only makes it difficult to produce spun yarn, but simply increasing the single yarn length reveals the rigidity inherent in high-strength fibers and makes it uniform. Since it becomes impossible to orient, there exists a problem that an intensity | strength maintenance rate becomes low on the contrary.
In order to solve such a problem, Japanese Patent Publication No. 1-16932 discloses a conjugation property in which a continuous yarn is drawn and shortened by a shredding method and made of fibers having an average single yarn length of 130 to 600 mm. Fully aromatic polyamide spun yarns have been proposed. However, according to the study of the present inventors, when trying to produce a spun yarn like polyparaphenylene terephthalamide fiber, for example, under the conditions described in the above publication, the strength maintenance ratio and the number of surface fluff vary. It turns out that there is a problem that it is easy to do. In other words, when polyparaphenylene terephthalamide fiber is used as the wholly aromatic polyamide fiber, toe is remarkably spread due to static electricity generated by friction between single yarns when it is checked, and this is disturbed on the roller. It becomes difficult to check out evenly. As a result, the fluctuation of the single yarn lengthens and the strength maintenance rate decreases, so even if high strength fibers are used, the strength of the processed yarn is reduced, the variation in strength is increased, and the surface fluff is significantly increased. Problem occurs.
The above-mentioned problem of decreasing the strength maintenance ratio can be improved by increasing the average single yarn length. To that end, however, it is necessary to increase the check length, and the tow is more likely to spread between the rollers, so that the supply roller and check There arises a problem that it is easy to wind around the cutting roller, and it is difficult to stably carry out the stamping process.
In this way, using a fiber that is prone to generate static electricity due to friction between single yarns, such as polyparaphenylene terephthalamide fiber, high average quality is high and the single yarn length variation is small. In fact, a strong check thread and its manufacturing method have not yet been proposed.
本発明の目的は、上記従来技術の有する問題点を解決し、原糸の強力維持率が高く、かつその単糸長のばらつきが小さい高品位な高強力牽切加工糸および該加工糸を安定して製造することができる方法を提供することにある。
本発明者らは、上記課題を解決すべく検討を重ねた結果、本発明を完成するに至った。
すなわち本発明の目的は、ポリパラフェニレンテレフタルアミド、ポリパラフェニレンベンゾオキサゾール、ポリエチレン、ポリビニルアルコールおよび全芳香族ポリエステルからなる群から選択される少なくとも一種のポリマーからなり、その強度が１４ｃＮ／ｄｔｅｘ以上の高強力短繊維から構成される牽切加工糸であって、該高強力短繊維の平均単糸長が５０〜９０ｃｍであり、且つ平均単糸長の変動係数（ＣＶ）が５０％以下であることを特徴とする高強力牽切加工糸、及びポリパラフェニレンテレフタルアミド、ポリパラフェニレンベンゾオキサゾール、ポリエチレン、ポリビニルアルコールおよび全芳香族ポリエステルからなる群から選択される少なくとも一種のポリマーからなり、その強度が１４ｃＮ／ｄｔｅｘ以上の高強力繊維を、そのローラー間距離が１００〜２００ｃｍである一対の供給ローラーと牽切ローラーとの間で、湿度が８０％以上の湿潤流体を付与して引き千切り、次いで流体ノズルで抱合して引取ることを特徴とする高強力牽切加工糸の製造方法によって達成される。The object of the present invention is to solve the above-mentioned problems of the prior art, and to maintain a high-quality high-strength check-processed yarn with high strength maintenance ratio of the raw yarn and small single yarn length variation, and to stabilize the processed yarn. It is to provide a method that can be manufactured.
As a result of repeated studies to solve the above problems, the present inventors have completed the present invention.
That is, an object of the present invention is made of at least one polymer selected from the group consisting of polyparaphenylene terephthalamide, polyparaphenylene benzoxazole, polyethylene, polyvinyl alcohol, and wholly aromatic polyester, and has a strength of 14 cN / dtex or more. A check-processed yarn composed of high-strength short fibers, the average single yarn length of the high-strength short fibers is 50 to 90 cm, and the coefficient of variation (CV) of the average single yarn length is 50% or less. The high-strength check yarn characterized by the above, and at least one polymer selected from the group consisting of polyparaphenylene terephthalamide, polyparaphenylene benzoxazole, polyethylene, polyvinyl alcohol and wholly aromatic polyester, and its strength High strength of 14cN / dtex or more The fiber is pulled between a pair of supply rollers having a distance between the rollers of 100 to 200 cm and a check roller by applying a wetting fluid having a humidity of 80% or more, and then entrapped by a fluid nozzle. This is achieved by a method for producing a high-strength check yarn characterized in that.
図１は、本発明の高強力牽切加工糸の製造に使用される、牽切加工装置の１例を示す側面図である。 FIG. 1 is a side view showing an example of a check processing device used for manufacturing the high-strength check processing yarn of the present invention.
以下、本発明の実施の形態について詳細に説明する。
本発明の牽切加工糸を構成する高強力短繊維は、その強度が、１４ｃＮ／ｄｔｅｘ以上、好ましくは１８〜５０ｃＮ／ｄｔｅｘの範囲である必要がある。該強度が１４ｃＮ／ｄｔｅｘ未満の場合には、牽切加工糸としての強度が不十分となり、本発明の目的を達成することができない。好ましく用いられる高強力短繊維としては、例えばポリパラフェニレンテレフタルアミド短繊維、ポリパラフェニレンベンゾオキサゾール短繊維、高強力ポリエチレン短繊維、高強力ポリビニルアルコール短繊維、全芳香族ポリエステル短繊維などをあげることができ、これらは２種以上を混合して用いてもよい。なかでもポリパラフェニレンテレフタルアミド短繊維が好適である。
高強力短繊維の単糸繊度は、あまりに大きすぎると牽切加工糸の構成単糸本数が少なくなり、単糸どうしの絡み合いが減少して牽切加工糸の強度が低下しやすくなるので、２．５ｄｔｅｘ以下、好ましくは１．１ｄｔｅｘ以下、さらに好ましくは０．８ｄｔｅｘ以下とするのが望ましい。
次に、本発明の牽切加工糸を構成する上記の高強力短繊維の平均単糸長は、５０〜９０ｃｍの範囲、特に６０〜８０ｃｍの範囲とする必要がある。該平均単糸長が５０ｃｍ未満の場合には、短繊維（原糸）の強度に対する牽切加工糸の強度維持率（牽切加工糸の強度／短繊維の強度）が小さくなり、原糸の強度が十分に発揮されなくなる。一方、平均単糸長が９０ｃｍを超える場合には、そのような牽切加工糸を得るためには牽切加工時の牽切長を２．０ｍ以上とする必要があり、その結果牽切部分でのトウが著しく開繊され、ローラへの巻付きが多発して安定に牽切加工することができなくなる。
また、本発明の高強力牽切加工糸は、その単糸長の変動係数（ＣＶ）が５０％以下、特に４０％以下である必要がある。この変動係数（ＣＶ）が５０％を超えると、単糸長のばらつきが大きすぎるため、牽切加工糸の強度がばらつき、つまり強度の標準偏差が大きくなり、均一で高品位な牽切加工糸を提供するという本発明の目的を達成することができなくなる。
さらに、本発明の高強力牽切加工糸は、その強度維持率が７０％以上が好適である。ただし、ここでいう強度維持率は、牽切加工糸が複数種類の短繊維で構成されている場合には、強度の低い短繊維の強度に対する維持率である。該維持率が７０％未満である場合には、短繊維（原糸）が持つ強度を効果的に発揮できていないだけでなく、構成単糸長も短いために表面毛羽が多くなり、該牽切加工糸の利用用途を限定してしまうこととなる。
以上に説明した本発明の牽切加工糸の好ましい製造方法について、図面を用いて詳しく説明する。図１は、本発明の高強力牽切加工糸の製造に好ましく用いられる牽切加工装置を示す。１は供給ニップローラー、２はシューター、３は牽切ニップローラー、４は吸引性空気ノズル、５は旋回性抱合ノズル、６はデリベリローラー、７は巻取牽切加工糸、８は高強力繊維である。
高強力繊維は、供給ニップローラーの前で所望の本数引き揃えられ重ね合わされながら供給ニップローラーを通過した後、シューターの中で牽切（引き千切り加工）される。この際、湿度が８０％以上の湿潤流体、例えば湿潤空気がシューター内に供給して高強力繊維に付与される。次いで、吸引性空気ノズルで牽切ニップローラーから引出され、次いで旋回性抱合ノズルによって絡みや毛羽巻付による抱合性が付与された後にデリベリローラーにより引取られる。
ここで用いられる高強力繊維は、上記のとおり牽切加工により短繊維とされるので、その強度は１４ｃＮ／ｄｔｅｘ以上、好ましくは１８〜５０ｃＮ／ｄｔｅｘの範囲とする必要がある。該強度が１４ｃＮ／ｄｔｅｘ未満の場合には、牽切加工後の短繊維強度が不十分となり、本発明の牽切加工糸を得ることができない。好ましく用いられる高強力繊維は、前述のとおりポリパラフェニレンテレフタルアミド繊維、ポリパラフェニレンベンゾオキサゾール繊維、高強力ポリエチレン繊維、高強力ポリビニルアルコール繊維、全芳香族ポリエステル繊維などであり、これらは２種以上を混合して用いてもよい。なかでもポリパラフェニレンテレフタルアミド繊維が好適である。
本発明においては、上記の高強力繊維には、油剤が繊維重量を基準として０．０５〜０．５重量％付着していることが好ましく、さらには、該付着油剤の水分含有率が７．０重量％以下であることが好ましい。油剤付着量が０．０５重量％未満の場合には、後述する引き千切り加工の際に繊維が帯電しやすくなり、静電気による反発でトウがばらけて断糸が多発しやすくなり、安定に牽切加工することが困難となる。一方、油剤付着量が０．５重量％を超える場合には、油剤による繊維収束効果のため牽切加工の際にトウが十分に開繊しなくなり、牽切糸を構成する単糸長ばらつきが大きくなりやすい。また、付着油剤の水分含有率が７．０重量％を超える場合には、該水分による繊維収束効果のため、油剤付着量が０．５重量％を超えた場合と同じような現象が現れやすくなる。
本発明においては、上記の高強力繊維を供給ローラー上と牽切ローラーとの間で引き千切り方式によって短繊維化した後、その繊維配列の乱れを防ぎながら該短繊維糸条を長手方向（引取り方向）に抜けないように流体ノズルで抱合して引取る必要がある。この引き千切り処理の際、引き千切られた短繊維の配列をできるだけ乱さないようにするため、漏斗状ガイドでカバーするなどの方策を付加することが好ましい。
本発明においては、この引き千切り処理の際に、該高強力繊維に湿度が８０％以上、好ましくは９０％以上、特に好ましくは９５％以上の湿潤流体、好ましくは湿潤空気を付与することが肝要である。該湿潤流体の湿度が８０％未満の場合には、繊維表面に帯電している静電気を放電する効果が少なくなり、繊維同志の反発によりトウがばらけて供給ローラーや牽切ローラーに単糸が巻きつきやすくなり、安定的に牽切加工することができなくなるので好ましくない。また、牽切長のばらつきを少なくするためには、牽切ローラー表面において繊維を均一に開繊する必要があるが、過度に開繊させると供給ローラーや牽切ローラーに単糸が巻きつきやすくなるためこの湿潤流体の付与が肝要となる。
一対の供給ローラーと牽切ローラーとの間の距離（牽切長）は、１００〜２００ｃｍの範囲、好ましくは１２０〜１７５ｃｍの範囲とする必要がある。該牽切長が１００ｃｍ未満の場合には、得られる牽切加工糸の平均単糸長が４０ｃｍ未満となり、原糸の強力維持率が７０％未満と小さくなり、本発明の目的を達成することができなくなる。一方、牽切長が２００ｃｍを超える場合には、供給ローラーと牽切ローラー間でのトウ幅が著しく広がるため、牽切ローラーへ単糸が巻きつきやすく、安定に牽切加工することができなくなるので好ましくない。
以上に説明した本発明の牽切加工糸は、適度に撚糸後、これを経糸および／または緯糸に用いて所望密度に織成し、精錬、熱セット、リラックス、カレンダー加工などを施して織物とすることができる。Hereinafter, embodiments of the present invention will be described in detail.
The high-strength short fibers constituting the check-processed yarn of the present invention must have a strength of 14 cN / dtex or more, preferably 18 to 50 cN / dtex. When the strength is less than 14 cN / dtex, the strength as a check-processed yarn becomes insufficient, and the object of the present invention cannot be achieved. Examples of the high-strength short fibers preferably used include polyparaphenylene terephthalamide short fibers, polyparaphenylene benzoxazole short fibers, high-strength polyethylene short fibers, high-strength polyvinyl alcohol short fibers, wholly aromatic polyester short fibers, and the like. These may be used as a mixture of two or more. Of these, polyparaphenylene terephthalamide short fibers are preferred.
If the single yarn fineness of the high-strength short fibers is too large, the number of single yarns constituting the checkered yarn will be reduced, the entanglement between the single yarns will be reduced, and the strength of the checkered yarn will tend to decrease. .5 dtex or less, preferably 1.1 dtex or less, more preferably 0.8 dtex or less.
Next, the average single yarn length of the high-strength short fibers constituting the check yarn of the present invention needs to be in the range of 50 to 90 cm, particularly in the range of 60 to 80 cm. When the average single yarn length is less than 50 cm, the strength maintenance ratio of the checkered yarn relative to the strength of the short fiber (raw yarn) (strength of the checkered yarn / strength of the short fiber) decreases, Strength is not fully exhibited. On the other hand, when the average single yarn length exceeds 90 cm, in order to obtain such a check-processed yarn, the check-off length at the check-off process needs to be 2.0 m or more. In this case, the tow is greatly opened and winding around the roller frequently occurs, so that it is impossible to stably carry out the check-up process.
Further, the high-strength check yarn of the present invention needs to have a single yarn length coefficient of variation (CV) of 50% or less, particularly 40% or less. If this coefficient of variation (CV) exceeds 50%, the variation in the single yarn length is too large, so the strength of the check thread varies, that is, the standard deviation of the strength increases, and the check thread with uniform and high quality. It is impossible to achieve the object of the present invention.
Further, it is preferable that the high strength check yarn of the present invention has a strength maintenance rate of 70% or more. However, the strength maintenance rate here is a maintenance rate with respect to the strength of short fibers having low strength when the check-processed yarn is composed of a plurality of types of short fibers. When the maintenance ratio is less than 70%, not only the strength of the short fiber (raw yarn) cannot be exhibited effectively, but also the constituent single yarn length is short, so that the surface fluff increases, and the check This limits the use of the cut thread.
A preferred method for producing the check-processed yarn of the present invention described above will be described in detail with reference to the drawings. FIG. 1 shows a check processing apparatus preferably used for manufacturing the high-strength check thread of the present invention. 1 is a supply nip roller, 2 is a shooter, 3 is a check nip roller, 4 is a suction air nozzle, 5 is a swivel conjugation nozzle, 6 is a delivery roller, 7 is a winding check thread, and 8 is high strength Fiber.
The high-strength fibers are passed through the supply nip roller while being aligned in a desired number in front of the supply nip roller, and then passed through the supply nip roller, and then checked (pulling and stripping) in the shooter. At this time, a wet fluid having a humidity of 80% or more, for example, wet air, is supplied into the shooter and applied to the high-strength fibers. Next, it is pulled out from the check nip roller by a suction air nozzle, and then entangled or conjugated by fluffing is imparted by the swivel conjugating nozzle and then taken out by the delivery roller.
The high-strength fiber used here is made into a short fiber by the check-off process as described above, and therefore the strength thereof needs to be 14 cN / dtex or more, preferably 18 to 50 cN / dtex. When the strength is less than 14 cN / dtex, the short fiber strength after the check processing becomes insufficient, and the check processing yarn of the present invention cannot be obtained. High-strength fibers preferably used are polyparaphenylene terephthalamide fiber, polyparaphenylene benzoxazole fiber, high-strength polyethylene fiber, high-strength polyvinyl alcohol fiber, wholly aromatic polyester fiber, etc. as described above, and these are two or more kinds. May be used in combination. Of these, polyparaphenylene terephthalamide fibers are preferred.
In the present invention, it is preferable that 0.05 to 0.5% by weight of the oil agent is attached to the high strength fiber based on the fiber weight, and the moisture content of the attached oil agent is 7. It is preferably 0% by weight or less. When the amount of the oil agent is less than 0.05% by weight, the fibers are likely to be charged during the pulling and stripping process described later, the tow is scattered due to the repulsion due to static electricity, and the yarn is likely to be broken frequently. It becomes difficult to cut. On the other hand, when the amount of the oil agent is more than 0.5% by weight, the tow does not sufficiently open during the check processing due to the fiber converging effect of the oil agent, and there is a variation in the single yarn length constituting the check yarn. Easy to grow. In addition, when the water content of the adhering oil exceeds 7.0% by weight, the same phenomenon as when the amount of oil adhering exceeds 0.5% by weight tends to appear due to the fiber convergence effect due to the water. Become.
In the present invention, the high-strength fibers are shortened by a pulling and cutting method between the supply roller and the check roller, and then the short fiber yarns are stretched in the longitudinal direction (drawing) while preventing disturbance of the fiber arrangement. It is necessary to tie it with a fluid nozzle so that it does not come off in the (take-off direction). It is preferable to add a measure such as covering with a funnel-shaped guide so as not to disturb the arrangement of the chopped short fibers as much as possible during the chopping process.
In the present invention, it is important to provide a wet fluid, preferably humid air, having a humidity of 80% or more, preferably 90% or more, particularly preferably 95% or more, to the high-strength fiber during the shredding treatment. It is. When the humidity of the wetting fluid is less than 80%, the effect of discharging static electricity charged on the fiber surface is reduced, and the tow is scattered due to the repulsion of the fibers, so that the single yarn is fed to the supply roller and the check roller. It is not preferable because it becomes easy to wind and can not be stably stamped. In addition, in order to reduce the variation in check length, it is necessary to spread the fibers uniformly on the surface of the check rollers. However, if the fibers are opened excessively, the single yarn easily winds around the supply roller or check rollers. Therefore, the application of this wetting fluid is essential.
The distance (checking length) between the pair of supply rollers and the check roller needs to be in the range of 100 to 200 cm, preferably in the range of 120 to 175 cm. When the check length is less than 100 cm, the average single yarn length of the obtained check processed yarn is less than 40 cm, and the strength maintenance rate of the original yarn is reduced to less than 70%, thereby achieving the object of the present invention. Can not be. On the other hand, when the check length exceeds 200 cm, the tow width between the supply roller and the check roller is remarkably widened, so that the single yarn is easily wound around the check roller and cannot be stably processed. Therefore, it is not preferable.
The check yarn of the present invention described above is moderately twisted and then woven to a desired density using the warp and / or weft, and subjected to refining, heat setting, relaxation, calendering, etc. to make a woven fabric Can do.
以下、実施例を挙げて本発明の構成および効果をさらに詳細に説明する。なお、実施例における各物性は次の方法で求めた。
（１）繊度、切断強度、切断伸度、弾性率
ＪＩＳ−Ｌ１０１３に準拠して測定した。ただし、撚り数は２５０ｔ／ｍとした。
（２）単糸長
牽切加工糸から、１２０本の単糸を切断しないようにランダムに抜き取りその単糸の長さを伸ばした状態で測定した値の平均値とした。
（３）単糸長の変動係数（ＣＶ）
上記方法によって求めた１２０本の単糸長の標準偏差（σ）と、その平均糸長（Ｘ）から次式を用いて計算する。
単糸長の変動係数（ＣＶ）（％）＝σ／Ｘ×１００
（４）断糸回数
工程調子の指標として、８時間牽切加工を実施した際の断糸回数（供給ローラーまたは牽切ローラーへの巻きつき断糸）を断糸回数とした。
［実施例１〜３、比較例１〜３］
図１に示す装置を用い、表１記載の単糸繊度と油剤付着量とを有し、総繊度が１１００ｄｔｅｘ、強度が２１ｃＮ／ｄｔｅｘであるポリパラフェニレンテレフタルアミド繊維（トワロン：テイジントワロン製）を２本引き揃え、ローラ間の距離（牽切長）及び湿潤空気の湿度を表１記載のとおりに変化させて、供給ニップローラー、シューター、牽切ニップローラーの間で、湿潤空気を付与しながら、牽切率約１０倍となるよう３００ｍ／分の速度で引き千切って短繊維束とした。
次いで吸引性を有する空気ノズルと旋回流を有する抱合ノズルとに、牽切ニップローラーとデリベリローラーとの速度比が１００：９９．５となるように通し、絡みを付与すると共に短繊維の毛羽をランダムに巻きつけ約２２０ｄｔｅｘの牽切加工糸を得た。得られた加工糸の物性を表１に示す。
［比較例４］
図１に示す装置を用い、単糸繊度が０．８４ｄｔｅｘ、総繊度が１１００ｄｔｅｘ、強度が２５ｃＮ／ｄｔｅｘ、油剤付着量が０．２重量％であるコポリパラフェニレン・３，４’−オキシジフェニレンテレフタルアミド繊維（テクノーラ：帝人テクノプロダクツ製）を２本引き揃え、ローラ間の距離（牽切長）を１２０ｃｍとして、供給ニップローラー、シューター、牽切ニップローラーの間で、湿度５０％の湿潤空気を付与しながら、牽切率約１０倍となるよう３００ｍ／分の速度で引き千切って短繊維束とした。
次いで吸引性を有する空気ノズルと旋回流を有する抱合ノズルとに、牽切ニップローラーとデリベリローラーとの速度比を１００：９９．５となるように通し、絡みを付与すると共に短繊維の毛羽をランダムに巻きつけ約２２０ｄｔｅｘの牽切加工糸を得た。得られた加工糸の物性を併せて表１に示す。
(1) Fineness, cutting strength, cutting elongation, elastic modulus Measured according to JIS-L1013. However, the number of twists was 250 t / m.
(2) Single yarn length It was set as the average value of the values measured in a state where 120 single yarns were randomly extracted from the check-processed yarn so as not to be cut and the length of the single yarn was extended.
(3) Single yarn length variation coefficient (CV)
Calculation is performed from the standard deviation (σ) of 120 single yarn lengths obtained by the above method and the average yarn length (X) using the following equation.
Single yarn length variation coefficient (CV) (%) = σ / X × 100
(4) Number of yarn breaks As a process condition index, the number of yarn breaks (carrying yarn wound around a supply roller or a check roller) when the check processing was performed for 8 hours was defined as the number of yarn cuts.
[Examples 1-3, Comparative Examples 1-3]
Using the apparatus shown in FIG. 1, a polyparaphenylene terephthalamide fiber (Twaron: manufactured by Teijin Twaron) having a single yarn fineness and an oil agent adhesion amount shown in Table 1, a total fineness of 1100 dtex, and a strength of 21 cN / dtex is used. While aligning the two, changing the distance between the rollers (checking length) and the humidity of wet air as shown in Table 1, while applying wet air between the supply nip roller, shooter, and checkout nip roller The fiber bundle was cut to a short fiber bundle at a speed of 300 m / min so that the check rate was about 10 times.
Next, the air nozzle having suction and the conjugating nozzle having swirl flow are passed through the check nip roller and the delivery roller so that the speed ratio is 100: 99.5, and entanglement is given and fluff of short fibers is provided. Were randomly wound to obtain a check-processed yarn of about 220 dtex. Table 1 shows the physical properties of the obtained processed yarn.
[Comparative Example 4]
Using the apparatus shown in FIG. 1,
Next, the air nozzle having suction and the conjugating nozzle having swirl flow are passed through the speed ratio of the check nip roller and the delivery roller to 100: 99.5 to impart entanglement and short fiber fluff. Were randomly wound to obtain a check-processed yarn of about 220 dtex. The physical properties of the obtained processed yarn are also shown in Table 1.
本発明によれば、従来の牽切加工糸と比較すると、高強力短繊維の強度に対して加工糸の強力維持率が高く、しかもその単糸長のばらつきが小さい牽切加工糸が得られるので、例えば防護衣料分野等で高品位な防護衣料を提供することができる。また、本発明の製造方法によれば、上記高強力牽切加工糸を安定的に生産することができる。 According to the present invention, compared to a conventional check thread, a check thread with a high strength retention rate of the processed thread with respect to the strength of the high-strength short fibers and a small variation in the single yarn length can be obtained. Therefore, for example, high-quality protective clothing can be provided in the protective clothing field and the like. Moreover, according to the manufacturing method of the present invention, the high-strength check yarn can be stably produced.
Claims (4)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004129449 | 2004-04-26 | ||
| JP2004129449 | 2004-04-26 | ||
| PCT/JP2005/008083 WO2005103353A1 (en) | 2004-04-26 | 2005-04-21 | High-strength yarn made through stretch breaking and process for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPWO2005103353A1 true JPWO2005103353A1 (en) | 2008-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006512658A Pending JPWO2005103353A1 (en) | 2004-04-26 | 2005-04-21 | High-strength check yarn and manufacturing method thereof |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20080003428A1 (en) |
| EP (1) | EP1741813A1 (en) |
| JP (1) | JPWO2005103353A1 (en) |
| KR (1) | KR20070020042A (en) |
| CN (1) | CN100575577C (en) |
| CA (1) | CA2564128A1 (en) |
| TW (1) | TW200540305A (en) |
| WO (1) | WO2005103353A1 (en) |
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| JP5393774B2 (en) * | 2008-04-11 | 2014-01-22 | ディーエスエム アイピー アセッツ ビー．ブイ． | Ultra high molecular weight polyethylene multifilament yarn and production method thereof. |
| JP5186445B2 (en) * | 2009-07-02 | 2013-04-17 | 帝人ファイバー株式会社 | Polyethylene naphthalate check yarn manufacturing method |
| DE102011015689A1 (en) * | 2011-03-31 | 2012-10-04 | Oerlikon Textile Gmbh & Co. Kg | Device for generating turbulences on a multifilament yarn |
| CN104120525B (en) * | 2014-07-25 | 2017-08-01 | 中国纺织科学研究院 | Ultrahigh molecular weight polyethylene yarn and its processing method |
| CN104593907B (en) * | 2014-12-26 | 2018-11-20 | 湖北立天生物工程有限公司 | A kind of crush cutting system method of short-staple |
| CN105002619A (en) * | 2015-07-29 | 2015-10-28 | 安徽创星实业有限公司 | Vinylon-polyester hook line |
| CN106948045B (en) * | 2017-03-01 | 2019-05-14 | 重庆市纺织工业研究所有限责任公司 | Utilize the crush cutting system method of set frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04361633A (en) * | 1991-06-11 | 1992-12-15 | Teijin Ltd | High-tenacity and heat-resistant filament-like staple fiber yarn and its production |
| JPH04361636A (en) * | 1991-06-11 | 1992-12-15 | Teijin Ltd | High-tenacity filament-like staple fiber yarn and production thereof |
| JPH05272010A (en) * | 1992-03-24 | 1993-10-19 | Teijin Ltd | Raw yarn for filament and staple conjugate yarn |
| JP2798580B2 (en) * | 1993-04-12 | 1998-09-17 | 帝人株式会社 | Filament yarn for drafting |
| CA2355316C (en) * | 1999-10-21 | 2005-06-14 | Teijin Limited | Process for producing meta-type aromatic polyamide filaments |
| KR100873726B1 (en) * | 2001-08-07 | 2008-12-12 | 데이진 가부시키가이샤 | Reinforcing composite yarn and production method therefor |
| WO2006025113A1 (en) * | 2004-08-31 | 2006-03-09 | Teijin Techno Products Limited | Fully aromatic polyamide fiber with excellent processability and adhesiveness |
-
2005
- 2005-04-21 WO PCT/JP2005/008083 patent/WO2005103353A1/en active Application Filing
- 2005-04-21 US US11/587,571 patent/US20080003428A1/en not_active Abandoned
- 2005-04-21 KR KR1020067024555A patent/KR20070020042A/en not_active Application Discontinuation
- 2005-04-21 EP EP05737001A patent/EP1741813A1/en not_active Withdrawn
- 2005-04-21 CA CA002564128A patent/CA2564128A1/en not_active Abandoned
- 2005-04-21 JP JP2006512658A patent/JPWO2005103353A1/en active Pending
- 2005-04-21 CN CN200580021347A patent/CN100575577C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN100575577C (en) | 2009-12-30 |
| KR20070020042A (en) | 2007-02-16 |
| US20080003428A1 (en) | 2008-01-03 |
| WO2005103353A1 (en) | 2005-11-03 |
| EP1741813A1 (en) | 2007-01-10 |
| TW200540305A (en) | 2005-12-16 |
| CN1977074A (en) | 2007-06-06 |
| CA2564128A1 (en) | 2005-11-03 |
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