JP4694233B2 - Manufacturing method of double-layer structure spun yarn - Google Patents
Manufacturing method of double-layer structure spun yarn Download PDFInfo
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- JP4694233B2 JP4694233B2 JP2005086300A JP2005086300A JP4694233B2 JP 4694233 B2 JP4694233 B2 JP 4694233B2 JP 2005086300 A JP2005086300 A JP 2005086300A JP 2005086300 A JP2005086300 A JP 2005086300A JP 4694233 B2 JP4694233 B2 JP 4694233B2
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Description
本発明は、二層構造紡績糸の製造方法に関するものである。 The present invention relates to a method for manufacturing a two-layer structured spun yarn.
従来より、ポリエステル繊維と羊毛繊維とを混合した紡績糸が知られている。代表的なものとして、ポリエステル繊維と羊毛繊維との混紡糸が知られている。この混紡糸を用いた織編物は、衣料の他、インテリア、寝装製品などにも広く使用されている。 Conventionally, a spun yarn in which polyester fiber and wool fiber are mixed is known. A typical example is a blended yarn of polyester fiber and wool fiber. Woven and knitted fabrics using this blended yarn are widely used in interiors, bedding products, etc. in addition to clothing.
しかしながら、この織編物は、廃棄されてもポリエステル繊維が長時間に渡って分解しない。そのため、地下地盤を汚染してしまうという問題がある。そこで、地球環境保護の点から、その改善が求められていた。 However, even if this woven or knitted fabric is discarded, the polyester fiber does not decompose for a long time. Therefore, there is a problem that the underground ground is contaminated. Therefore, the improvement was demanded from the viewpoint of global environmental protection.
そこで、特許文献１において、ポリ乳酸系繊維と羊毛繊維との混紡糸が提案されている。この混紡糸は、生分解を有するため、この混紡糸を用いて環境への負荷が少ない織編物が提供できる。
しかしながら、上記の混紡糸においては、ポリ乳酸系繊維が混紡糸表面の一部に露出している。そのため、この混紡糸を用いた織編物には、アイロンを掛けると、ポリ乳酸系繊維が溶融し、風合いが損なわれるという問題がある。さらに、ポリ乳酸系繊維に基づく寸法安定性及び張り・腰感などの特性を有するが、保温性及びソフト感など羊毛繊維に基づく特性が不十分であるという問題もある。 However, in the above blended yarn, the polylactic acid fiber is exposed on a part of the blended yarn surface. For this reason, the woven or knitted fabric using the blended yarn has a problem that, when ironed, the polylactic acid fiber melts and the texture is impaired. Furthermore, although it has characteristics, such as dimensional stability based on a polylactic acid-type fiber, tension | tensile_strength, and a waist feeling, there also exists a problem that the characteristics based on wool fiber, such as heat retention and a soft feeling, are inadequate.
本発明は、上記のような問題点を解消するものであり、生分解を有し、アイロンの熱によるポリ乳酸系繊維の溶融を抑制しうる二層構造紡績糸、及び該二層構造紡績糸を用いて、寸法安定性及び張り・腰感などに加え、保温性及びソフト感などの特性をも併せ持つ織編物を提供することを技術的な課題とするものである。 The present invention solves the above-mentioned problems, has a two-layer structure spun yarn that has biodegradation and can suppress melting of polylactic acid fibers due to the heat of an iron, and the two-layer structure spun yarn It is a technical problem to provide a woven or knitted fabric having characteristics such as heat retention and soft feeling in addition to dimensional stability and tension / waist feeling.
本発明者らは、上記課題を解決するために鋭意研究の結果、ポリ乳酸系短繊維を獣毛繊維で被覆すれば、アイロンの熱によるポリ乳酸系短繊維の溶融を抑制でき、さらに、保温性、ソフト感など獣毛繊維に基づく特性を一段と織編物に反映させることができることを見出し、本発明に到達した。 As a result of intensive studies to solve the above problems, the present inventors can suppress melting of the polylactic acid-based short fibers due to the heat of the iron if the polylactic acid-based short fibers are covered with animal hair fibers, and further, the heat retention The inventors have found that properties based on animal hair fibers such as sex and softness can be more reflected in woven and knitted fabrics, and have reached the present invention.
すなわち、本発明は、第一に、断面が芯鞘型の二層構造紡績糸であり、芯部にポリ乳酸系短繊維が配され、鞘部に獣毛繊維が配されてなる二層構造紡績糸の製造方法であって、前紡工程において１本のポリ乳酸繊維束と２本の獣毛ギル繊維束とをギル機出口付近で合体させるにあたり、フロントローラーから紡出された２本の獣毛ギル繊維束のうち、一方を最上位に位置するスライバーガイド３Ａ、他方を最下位に位置するスライバーガイド３Ｃにそれぞれ供給すると共に、ポリ乳酸繊維束を両スライバーガイドの中央に位置するスライバーガイド３Ｂに供給し、次いで、前記３本の繊維束を、ガイドバーにより２本の獣毛ギル繊維束がポリ乳酸繊維束を挟み込むような形に配置させた後、コイラーを通過する過程でこれらを合体させ二層構造繊維束となし、次に得られた二層構造繊維束をドラフトして粗糸とし、後にこれを精紡することを特徴とする二層構造紡績糸の製造方法を要旨とするものである。
That is, the present invention is firstly a two-layer structure spun yarn having a core-sheath type cross-section, wherein a polylactic acid-based short fiber is disposed in the core portion, and animal hair fibers are disposed in the sheath portion. A method for producing spun yarn, in which two polylactic acid fiber bundles and two animal hair gil fiber bundles are combined in the pre-spinning process near the exit of the gil machine, Among the animal hair gil fiber bundles, one is supplied to the sliver guide 3A positioned at the top and the other is supplied to the sliver guide 3C positioned at the bottom, and the sliver guide is positioned at the center of both sliver guides. Then, the three fiber bundles are arranged in such a way that the two animal hair gill fiber bundles sandwich the polylactic acid fiber bundle with the guide bar, and then these are passed through the coiler. Combined two-layer structure Fiber bundles and without, and as a roving drafting a two-layer structure fiber bundle obtained then, it is an gist a method for manufacturing a two-layer structured spun yarn, characterized by subsequently spinning the same.
本発明の二層構造紡績糸は、生分解を有するものである。また、織編物に用いて、アイロンの熱によるポリ乳酸系短繊維の溶融を抑制できる実用的な織編物を作製しうるものである。 The two-layer structure spun yarn of the present invention has biodegradation. Moreover, it is possible to produce a practical woven or knitted fabric that can be used for woven or knitted fabric and can suppress melting of the polylactic acid-based short fibers due to the heat of the iron.
また、本発明の織編物は、寸法安定性及び張り・腰感などに加え、保温性及びソフト感などの特性をも有するものである。したがって、本発明の織編物は、ユニフォーム衣料や下着衣料などに好適に用いることができる。 Further, the woven or knitted fabric of the present invention has characteristics such as heat retention and soft feeling in addition to dimensional stability and tension and waist feeling. Therefore, the woven or knitted fabric of the present invention can be suitably used for uniform clothing, underwear clothing, and the like.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の二層構造紡績糸は、断面が芯鞘型であり、芯部にポリ乳酸系短繊維が配される。 The double-layer structure spun yarn of the present invention has a core-sheath cross section, and a polylactic acid-based short fiber is arranged in the core.
本発明に用いるポリ乳酸系短繊維としては、乳酸の構造単位がＬ−乳酸であるポリＬ−乳酸、構造単位がＤ−乳酸であるポリＤ−乳酸、Ｌ−乳酸とＤ−乳酸との共重合体であるポリＤＬ−乳酸、もしくはポリＤ−乳酸とポリ−Ｌ乳酸との混合体であるポリ乳酸ステレオコンプレックス、さらにはＤ−乳酸とヒドロキシカルボン酸との共重合体、Ｌ−乳酸とヒドロキシカルボン酸との共重合体、Ｄ−乳酸とＬ−乳酸とヒドロキシカルボン酸との共重合体などのポリ乳酸系ポリマーで形成されたポリ乳酸系短繊維を用いることができる。 Polylactic acid-based short fibers used in the present invention include poly-L-lactic acid in which the structural unit of lactic acid is L-lactic acid, poly-D-lactic acid in which the structural unit is D-lactic acid, and a combination of L-lactic acid and D-lactic acid. Poly DL-lactic acid which is a polymer, or polylactic acid stereocomplex which is a mixture of poly D-lactic acid and poly-L lactic acid, a copolymer of D-lactic acid and hydroxycarboxylic acid, L-lactic acid and hydroxy Polylactic acid-based short fibers formed of a polylactic acid-based polymer such as a copolymer with carboxylic acid or a copolymer of D-lactic acid, L-lactic acid and hydroxycarboxylic acid can be used.
ここで、前記ヒドロキシカルボン酸としては、グリコール酸、ヒドロキシ酪酸、ヒドロキシ吉草酸、ヒドロキシペンタン酸、ヒドロキシカプロン酸、ヒドロキシヘプタン酸、ヒドロキシカプリル酸などがあげられる。 Here, examples of the hydroxycarboxylic acid include glycolic acid, hydroxybutyric acid, hydroxyvaleric acid, hydroxypentanoic acid, hydroxycaproic acid, hydroxyheptanoic acid, and hydroxycaprylic acid.
ポリ乳酸系短繊維を形成するポリ乳酸系ポリマーの数平均分子量としては、２万〜１５万であることが好ましい。融点としては、アイロンの熱による溶融を抑制する点から、１２０℃以上が好ましく、１５０℃以上がより好ましい。 The number average molecular weight of the polylactic acid polymer forming the polylactic acid short fibers is preferably 20,000 to 150,000. The melting point is preferably 120 ° C. or higher, more preferably 150 ° C. or higher, from the viewpoint of suppressing melting of the iron due to heat.
また、ポリ乳酸系短繊維の形態が短繊維であることで、織編物の吸水性や軽量感などを向上させることができ、下着用途などへの適用が可能となる。ポリ乳酸系短繊維は、フラット状でも捲縮を有していてもよい。 Moreover, when the form of the polylactic acid-based short fiber is a short fiber, it is possible to improve the water absorption and lightness of the woven or knitted fabric, and it can be applied to underwear applications. The polylactic acid-based short fibers may be flat or have crimps.
ポリ乳酸系短繊維の断面形状としては、特に限定されるものではなく、必要に応じて丸断面、中空断面、異形断面などを適宜選定すればよい。 The cross-sectional shape of the polylactic acid-based short fiber is not particularly limited, and a round cross-section, a hollow cross-section, a modified cross-section, etc. may be appropriately selected as necessary.
ポリ乳酸系短繊維の平均繊度としては、特に限定されるものではないが、０．６〜１０ｄｔｅｘが好ましく、１．５〜６．０ｄｔｅｘがより好ましい。平均繊度が０．６ｄｔｅｘ未満であると、織編物の張り・腰感が低減する傾向にあるので好ましくない。一方、１０ｄｔｅｘを超えると、織編物の風合いが硬化する傾向にあるので好ましくない。ここで、平均繊度とは、ＪＩＳ Ｌ１０１５．８．５．１Ｂ法（簡便法）に準じて測定された値のことをいう。 The average fineness of the polylactic acid-based short fibers is not particularly limited, but is preferably 0.6 to 10 dtex, and more preferably 1.5 to 6.0 dtex. If the average fineness is less than 0.6 dtex, the tension and lower back of the woven or knitted fabric tend to be reduced, which is not preferable. On the other hand, if it exceeds 10 dtex, the texture of the woven or knitted fabric tends to harden, which is not preferable. Here, the average fineness means a value measured according to JIS L1015.8.5.1B method (simple method).
また、ポリ乳酸系短繊維の平均繊維長としては、６４〜１０２ｍｍが好ましく、７５〜８５ｍｍがより好ましい。平均繊維長が６４ｍｍ未満であると、二層構造紡績糸の均斉度が低下する傾向にあるので好ましくない。一方、１０２ｍｍを超えると、紡績工程中に糸切れが多発する傾向にあるので好ましくない。ここで、平均繊維長とは、ＪＩＳ Ｌ１０１５．８．４．１Ａ法（ステープルダイアグラム法）に準じて測定された値のことをいう。 Further, the average fiber length of the polylactic acid-based short fibers is preferably 64 to 102 mm, and more preferably 75 to 85 mm. If the average fiber length is less than 64 mm, the uniformity of the two-layer structure spun yarn tends to decrease, such being undesirable. On the other hand, if it exceeds 102 mm, yarn breakage tends to occur frequently during the spinning process, which is not preferable. Here, the average fiber length refers to a value measured according to JIS L1015.8.4.1 A method (staple diagram method).
一方、本発明の二層構造紡績糸においては、鞘部に獣毛繊維が配される。 On the other hand, in the two-layer structure spun yarn of the present invention, animal hair fibers are arranged in the sheath.
本発明に用いる獣毛繊維としては、特に限定されるものではないが、例えば、羊、ヤギ、ウサギ、アルパカ又はラマあるいはこれらに類似する動物から採取される天然ケラチン繊維を用いることができる。また、獣毛繊維として、塩素化によってスケールが除去されたもの、あるいは、酸化処理された後ポリアミド系樹脂でスケールが被覆されたものなどを採用すると、織編物に防縮性を付与することができる。 The animal hair fiber used in the present invention is not particularly limited. For example, natural keratin fiber collected from sheep, goat, rabbit, alpaca or llama or similar animals can be used. In addition, when animal hair fibers having a scale removed by chlorination, or those having a scale coated with a polyamide-based resin after being oxidized are used, it is possible to impart shrinkage resistance to a woven or knitted fabric. .
獣毛繊維の平均繊維直径としては、特に限定されるものではないが、１５〜３０μｍが好ましく、１８〜２２μｍがより好ましい。平均繊維直径が１５μｍ未満であると、織編物の張り・腰感が低減する傾向にあるので好ましくない。一方、３０μｍを超えると、織編物の風合いが硬化する傾向にあるので好ましくない。ここで、平均繊維直径とは、ＪＩＳ Ｌ１０８１．７．１．４Ｄ法（オプティカルアナライザによる方法）に準じて測定された値のことをいう。 Although it does not specifically limit as an average fiber diameter of an animal hair fiber, 15-30 micrometers is preferable and 18-22 micrometers is more preferable. If the average fiber diameter is less than 15 μm, the tension and lower back of the woven or knitted fabric tend to be reduced, which is not preferable. On the other hand, if it exceeds 30 μm, the texture of the woven or knitted fabric tends to harden, which is not preferable. Here, the average fiber diameter means a value measured according to JIS L1081.7.1.4D method (method using an optical analyzer).
また、獣毛繊維の平均繊維長としては、６４〜１０２ｍｍが好ましく、７０〜８５ｍｍがより好ましい。平均繊維長が６４ｍｍ未満であると、二層構造紡績糸の均斉度が低下する傾向にあるので好ましくない。一方、１０２ｍｍを超えると、紡績工程中に糸切れが多発する傾向にあるので好ましくない。ここで、平均繊維長とは、ＪＩＳ Ｌ１０８１．７．２．３Ｃ法（エレクトロニックマシンによる方法）に準じて測定された値のことをいう。 Moreover, as an average fiber length of animal hair fiber, 64-102 mm is preferable and 70-85 mm is more preferable. If the average fiber length is less than 64 mm, the uniformity of the two-layer structure spun yarn tends to decrease, such being undesirable. On the other hand, if it exceeds 102 mm, yarn breakage tends to occur frequently during the spinning process, which is not preferable. Here, the average fiber length refers to a value measured according to JIS L1081.7.7.3C method (method using an electronic machine).
本発明の二層構造紡績糸において、芯／鞘の質量比は、０．２５〜１．５０であることが好ましい。芯／鞘の質量比が０．２５未満であると、製造時において芯部の繊維群に鞘部の繊維群が巻きつき難くなる。一方、１．５０を超えると、鞘部の繊維群が芯部の繊維群を被覆することができなくなり、芯部のポリ乳酸系短繊維が露出する。 In the two-layer structure spun yarn of the present invention, the core / sheath mass ratio is preferably 0.25 to 1.50. When the mass ratio of the core / sheath is less than 0.25, the fiber group of the sheath part is difficult to wind around the fiber group of the core part during production. On the other hand, when it exceeds 1.50, the fiber group in the sheath part cannot cover the fiber group in the core part, and the polylactic acid-based short fiber in the core part is exposed.
本発明の二層構造紡績糸は、このように芯部に配されたポリ乳酸系短繊維が実質的に表面に露出することなく、鞘部に配された獣毛繊維によって覆われている。そのため、アイロンの熱によるポリ乳酸系短繊維の溶融を抑制する効果が高い。 The double-layer structure spun yarn of the present invention is covered with the animal hair fibers arranged in the sheath portion without substantially exposing the polylactic acid-based short fibers arranged in the core portion to the surface in this way. Therefore, the effect of suppressing the melting of the polylactic acid-based short fibers due to the heat of the iron is high.
さらに、本発明の二層構造紡績糸の撚数は、特に限定されるものではないが、下記式（１）で表される撚係数Ｋを７０〜９０の範囲にすることが好ましい。 Furthermore, the number of twists of the two-layer structure spun yarn of the present invention is not particularly limited, but the twist coefficient K represented by the following formula (1) is preferably in the range of 70 to 90.
また、本発明の二層構造紡績糸を用いた織編物（以下、「本発明の織編物」という）においては、二層構造紡績糸における芯部に配されたポリ乳酸系短繊維が、織編物に対し寸法安定性及び張り・腰感などを付与することができ、鞘部に配された獣毛繊維が、織編物に対し保温性及びソフト感などを付与することができる。本発明の織編物は、その少なくとも一部に上記した本発明の二層構造紡績糸が用いられてなるものであるが、発明の効果をより高めるためには、構成糸条の４０質量％以上に本発明の二層構造紡績糸が用いられていることが好ましい。 In the knitted or knitted fabric using the double-layered spun yarn of the present invention (hereinafter referred to as “woven knitted fabric of the present invention”), the polylactic acid-based short fibers arranged at the core of the double-layered spun yarn are woven. The knitted fabric can be provided with dimensional stability, tension and waist feeling, and animal hair fibers disposed in the sheath can impart heat retention and soft feeling to the woven or knitted fabric. The woven or knitted fabric of the present invention is formed by using the above-described double-layered spun yarn of the present invention at least in part, but in order to further enhance the effects of the invention, it is 40% by mass or more of the constituent yarn. It is preferable that the double-layered spun yarn of the present invention is used.
なお、本発明の二層構造紡績糸以外の糸条を併用する場合、併用するための方法としては特に限定されるものではなく、例えば、引き揃え、合撚、混繊など糸条同士を複合する方法、あるいは、交編織、配列など製織編の際に複合する方法などが採用できる。 In addition, when a yarn other than the two-layer structure spun yarn of the present invention is used in combination, the method for using the yarn is not particularly limited. For example, the yarns such as drawing, twisting, and blending are combined. Or a method of compounding at the time of weaving and knitting such as union knitting and arrangement.
次に、本発明の二層構造紡績糸を製造する方法について説明する。 Next, a method for producing the double-layered spun yarn of the present invention will be described.
本発明の二層構造紡績糸を製造するには、まず、ポリ乳酸系短繊維からなるスライバー（以下、「ポリ乳酸スライバー」という）と獣毛繊維からなるスライバー（以下、「獣毛スライバー」という）とを用意する。ポリ乳酸スライバーの作製方法としては、まず、ポリ乳酸系ポリマーを溶融紡糸後、数十万ｄｔｅｘのトウにして延伸し、所定長に切断して繊維塊とする。次いでこの繊維塊をカーディングすることでポリ乳酸スライバーを得る方法が採用できる。また、獣毛スライバーの作製方法としては、通常の梳毛紡績法、すなわち洗毛、カーディング、コーミングを経て獣毛スライバーを得る方法が採用できる。 In order to produce the two-layer structure spun yarn of the present invention, first, a sliver composed of polylactic acid-based short fibers (hereinafter referred to as “polylactic acid sliver”) and a sliver composed of animal hair fibers (hereinafter referred to as “animal hair sliver”). ) And prepare. As a method for producing a polylactic acid sliver, first, a polylactic acid-based polymer is melt-spun and then stretched into a tow of several hundred thousand dtex and cut into a predetermined length to obtain a fiber lump. Next, a method of obtaining a polylactic acid sliver by carding the fiber mass can be employed. In addition, as a method for producing the animal hair sliver, there can be adopted an ordinary hair spinning method, that is, a method of obtaining an animal hair sliver through hair washing, carding and combing.
用意された両スライバーは、前紡工程に投入され粗糸となる。前紡工程とは、ダブリングとドラフトとを繰り返してスライバーの太さを細くし、均斉度の高い粗糸を作製するためのものである。前紡工程においては、まず、それぞれのスライバーに３〜５回程度のギリングを施し、均斉化されたポリ乳酸スライバー（以下、「ポリ乳酸繊維束」という）と均斉化された獣毛スライバー（以下、「獣毛繊維束」という）とを作製する。次に、獣毛繊維束のみ再度ギリングし、紡出された獣毛繊維束（以下、「獣毛ギル繊維束」という）をギル機の出口付近で上記ポリ乳酸繊維束と合体させて、二層構造繊維束を作製する。そして、ボビナーを使用して、該二層構造繊維束に１２〜１４倍のドラフトを与えることで粗糸を得ることができる。 Both prepared slivers are put into a pre-spinning process to become rovings. The pre-spinning process is for making a coarse yarn having a high degree of uniformity by repeating doubling and drafting to reduce the thickness of the sliver. In the pre-spinning process, first, each sliver is gilded about 3 to 5 times, and the homogenized polylactic acid sliver (hereinafter referred to as “polylactic acid fiber bundle”) and the homogenized animal hair sliver (hereinafter referred to as “polylactic acid fiber bundle”). , “Animal hair fiber bundle”). Next, only the animal hair fiber bundle is again gilled, and the spun animal hair fiber bundle (hereinafter referred to as “animal hair gill fiber bundle”) is combined with the polylactic acid fiber bundle near the exit of the gill machine. A layered fiber bundle is produced. And a bobbiner can be used to obtain a roving yarn by giving a draft of 12 to 14 times to the two-layer structure fiber bundle.
前紡工程において、ポリ乳酸繊維束と獣毛ギル繊維束とを合体させる際に用いる合糸装置としては、例えば、図１に示すような装置を用いることができる。この合糸装置は、ギル機の後段に取り付て用いるものである。フロントローラー１から紡出された２本の獣毛ギル繊維束８は、その一方がガイドローラー６を介すことで最上位に位置するスライバーガイド３Ａに供給され、もう一方が、最下位に位置するスライバーガイド３Ｃに供給される。ポリ乳酸繊維束７は、ガイドローラー２Ａ、２Ｂを介して合糸装置に導入され、中央に位置するスライバーガイド３Ｂに供給される。スライバーガイドを通過した３本の繊維束は、ガイドバー４により、２本の獣毛ギル繊維束８がポリ乳酸繊維束７を挟み込むような形に配置される。そして、これらの３本の繊維束は、コイラー５を通過する過程で合体して二層構造繊維束となり、ケンスに収められる。 For example, an apparatus as shown in FIG. 1 can be used as the synthesizing apparatus used when the polylactic acid fiber bundle and the animal hair gil fiber bundle are united in the pre-spinning step. This synthesizing device is used by being attached to the subsequent stage of the gil machine. One of the two animal hair gil fiber bundles 8 spun from the front roller 1 is supplied to the sliver guide 3A located at the uppermost position through the guide roller 6, and the other is located at the lowermost position. To the sliver guide 3C. The polylactic acid fiber bundle 7 is introduced into the spinning device via the guide rollers 2A and 2B and supplied to the sliver guide 3B located at the center. The three fiber bundles that have passed through the sliver guide are arranged in such a manner that the two animal hair gil fiber bundles 8 sandwich the polylactic acid fiber bundle 7 by the guide bar 4. These three fiber bundles are united in the process of passing through the coiler 5 to form a two-layer structure fiber bundle, which is stored in a can.
二層構造繊維束は、その後ドラフトを与えられて粗糸となり、この粗糸を精紡することで本発明の二層構造紡績糸を得ることができる。精紡に使用する精紡機としては、生産性の点からリング精紡機が好ましい。 The two-layer structure fiber bundle is then given a draft to become a roving yarn, and the two-layer structure spun yarn of the present invention can be obtained by spinning the roving yarn. As a spinning machine used for spinning, a ring spinning machine is preferable from the viewpoint of productivity.
なお、得られた二層構造紡績糸を製織編工程に投入しやすくするためには、精紡により巻き取られた二層構造紡績糸を所定質量のパッケージになるよう巻返すか、あるいは枷取りするのが好ましい。また、二層構造紡績糸に毛羽焼きやワックス加工などを施すと、二層構造紡績糸の商品価値を高めることができる。 In order to make it easier to put the obtained two-layer structure spun yarn into the weaving and knitting process, the two-layer structure spun yarn wound by fine spinning is wound up into a package of a predetermined mass, or is wound. It is preferable to do this. In addition, if the double-layered spun yarn is subjected to fluffing or waxing, the commercial value of the double-layered spun yarn can be increased.
次に、本発明を実施例によって具体的に説明する。 Next, the present invention will be specifically described with reference to examples.
（実施例１）
ポリ乳酸スライバーとして、１質量％のＤ−乳酸と９９質量％のＬ−乳酸との共重合体であるポリＤＬ−乳酸（融点１７０℃、数平均分子量８５０００）をポリ乳酸系ポリマーとして用いた平均繊度３．０ｄｔｅｘ、平均繊維長８０ｍｍのポリ乳酸系短繊維からなる太さ２０．０ｇ／ｍのポリ乳酸スライバーを用意した。また、獣毛スライバーとして、平均繊維直径２１．７μｍ、平均繊維長８０ｍｍのメリノウールからなる太さ２５．０ｇ／ｍの獣毛スライバーを別途用意した。
Example 1
Average using poly DL-lactic acid (melting point 170 ° C., number average molecular weight 85000), which is a copolymer of 1% by mass of D-lactic acid and 99% by mass of L-lactic acid, as a polylactic acid sliver A polylactic acid sliver having a thickness of 20.0 g / m made of polylactic acid-based short fibers having a fineness of 3.0 dtex and an average fiber length of 80 mm was prepared. Further, as an animal hair sliver, an animal hair sliver having a thickness of 25.0 g / m made of merino wool having an average fiber diameter of 21.7 μm and an average fiber length of 80 mm was separately prepared.
前紡工程において、まず、上記ポリ乳酸スライバーにギリングを４回施し、太さ２．０ｇ／ｍのポリ乳酸繊維束を得た。同様に上記獣毛スライバーにギリングを３回施し、太さ１２．０ｇ／ｍの獣毛繊維束を得た。次に、得られた獣毛繊維束を２本同時に８倍のドラフトを与えながらギリングし、フロントローラーから１．５ｇ／ｍの獣毛ギル繊維束を紡出しつつ、上記ポリ乳酸繊維束を図１に示すような合糸装置に導入した。そして、２本の獣毛ギル繊維束で該ポリ乳酸繊維束を挟み込み、コイラーを通過する過程で合体させて二層構造繊維束となし、ケンスに収めた。次に、得られた二層構造繊維束をケンスから引き出し、ボビナーを使用して１３倍のドラフトを与え、太さ０．４ｇ／ｍの粗糸を得た。 In the pre-spinning step, first, the polylactic acid sliver was subjected to gilling four times to obtain a polylactic acid fiber bundle having a thickness of 2.0 g / m. Similarly, the above-mentioned animal hair sliver was gilded three times to obtain an animal hair fiber bundle having a thickness of 12.0 g / m. Next, the two animal hair fiber bundles obtained were giled while simultaneously giving a draft of 8 times, and a 1.5 g / m animal hair gil fiber bundle was spun from the front roller while drawing the polylactic acid fiber bundle. 1 was introduced into a spinning device as shown in FIG. The polylactic acid fiber bundle was sandwiched between two animal hair gil fiber bundles, and united in the process of passing through a coiler to form a two-layer structure fiber bundle, which was stored in a can. Next, the obtained two-layer structure fiber bundle was pulled out from the can and given a draft of 13 times using a bobiner to obtain a roving yarn having a thickness of 0.4 g / m.
そして、得られた粗糸を精紡機に供給し、１６倍のドラフトを与え、撚係数７０の加撚を施し、芯／鞘の質量比が０．６７である４０番手（メートル番手）の本発明の二層構造紡績糸を得た。 Then, the obtained roving is supplied to a spinning machine, a draft of 16 times is given, twisting with a twisting factor of 70 is applied, and a 40th (metric) book with a core / sheath mass ratio of 0.67 An inventive bilayer spun yarn was obtained.
次に、この二層構造紡績糸を用いて、釜径７６ｃｍ、針密度１６ゲージの丸編機を使用して、フライス組織の生機を編成した。そして、この生機に染色仕上げ加工を施して、本発明の織編物を得た。 Next, using this double-layer structure spun yarn, a milling machine was knitted using a circular knitting machine having a hook diameter of 76 cm and a needle density of 16 gauge. And this textile machine was dyed and finished to obtain a woven or knitted fabric of the present invention.
得られた織編物は、生分解性を有し、アイロンの熱によるポリ乳酸系短繊維の溶融を抑制できる実用的な織編物であるだけでなく、寸法安定性及び張り・腰感と共に保温性及びソフト感にも優れる織編物であった。 The resulting woven or knitted fabric is biodegradable and is not only a practical woven and knitted fabric that can suppress the melting of polylactic acid-based short fibers due to the heat of the iron, but also retains heat with dimensional stability and tightness and waist. In addition, it was a woven or knitted fabric excellent in soft feeling.
１ フロントローラー
２Ａ、２Ｂ、６ ガイドローラー
３Ａ、３Ｂ、３Ｃ スライバーガイド
４ ガイドバー
５ コイラー
７ ポリ乳酸繊維束
８ 獣毛ギル繊維束
1 Front roller 2A, 2B, 6 Guide roller 3A, 3B, 3C Sliver guide 4 Guide bar 5 Coiler 7 Polylactic acid fiber bundle 8 Animal hair gil fiber bundle
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