JP2002227050A - Sewing yarn - Google Patents

Sewing yarn

Info

Publication number
JP2002227050A
JP2002227050A JP2001020316A JP2001020316A JP2002227050A JP 2002227050 A JP2002227050 A JP 2002227050A JP 2001020316 A JP2001020316 A JP 2001020316A JP 2001020316 A JP2001020316 A JP 2001020316A JP 2002227050 A JP2002227050 A JP 2002227050A
Authority
JP
Japan
Prior art keywords
thread
shrinkage
sewing
yarn
twist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001020316A
Other languages
Japanese (ja)
Inventor
Hiroki Koba
裕樹 古庭
Toshihiko Kimura
俊彦 木村
Kazuo Umeda
和生 梅田
Original Assignee
Toray Ind Inc
東レ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toray Ind Inc, 東レ株式会社 filed Critical Toray Ind Inc
Priority to JP2001020316A priority Critical patent/JP2002227050A/en
Publication of JP2002227050A publication Critical patent/JP2002227050A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a sewing yarn solving a shrinkage by sewing of a seam and a deformation, having an excellent appearance quality of the seam, easily degradable in natural environment and suitable for a biodegradable cloth. SOLUTION: This sewing yarn is obtained by performing final twist on a plurality of multifilament yarns subjected to first twist and combining and is characterized by having -2 to 5% shrinkage percentage calculated by adding shrinkage percentage by dry heat and shrinkage percentage by boiled water and 10-50% lowering ratio of strength in a soil for one year and comprising an aliphatic polyester as a part of the ingredient composing the sewing yarn.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、脂肪族ポリエステ
ル繊維糸条からなる縫糸に関し、さらに詳しくは、本発
明は、脂肪族ポリエステルの有する鮮やかな発色性およ
び光沢を生かしながら、縫い目品位に優れ、縫い縮みを
抑えることができる生分解性生地に好適な脂肪族ポリエ
ステル縫糸に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing thread made of an aliphatic polyester fiber thread, and more particularly, the present invention relates to a sewing thread having excellent seam quality while making use of the vivid coloration and luster of an aliphatic polyester. The present invention relates to an aliphatic polyester thread suitable for a biodegradable fabric capable of suppressing seam shrinkage.
【0002】[0002]
【従来の技術】従来、脂肪族ポリエステル繊維は、その
優れた生分解性を利用して、産業資材用途を中心に使用
されているが、衣料用途への具体的展開はなされていな
いのが現状である。一方、ポリエチレンテレフタレート
等の芳香族ポリエステルからなるポリエステル繊維から
なる縫糸は衣料用途に広く用いられている。しかしなが
ら、この芳香族ポリエステル繊維の場合は、ヤング率と
強力に優れた縫糸となるものの、風合いが粗硬で、屈折
率が高いために発色性が悪く、縫い縮みが大きいという
問題点があり、高級感のある光沢も程遠く、生分解性に
おいて自然環境中で容易に分解しないため、廃棄に際し
ては焼却処理を行なわない限り、半永久的に残存してし
まうという欠点があった。また、通常衣料用縫糸は、縫
い目品位や、染色性、縫い縮みのない縫糸が求められ、
芳香族ポリエステル縫糸のように収縮の高い縫糸で縫製
された縫目は、その縫糸の縮みに耐えきれずにパッカリ
ングが発生してしまい、生地の縫い目品位を低下させて
しまうという課題があった。
2. Description of the Related Art Conventionally, aliphatic polyester fibers have been used mainly for industrial materials because of their excellent biodegradability, but they have not been specifically developed for clothing. It is. On the other hand, sewing threads made of polyester fibers made of an aromatic polyester such as polyethylene terephthalate are widely used for clothing. However, in the case of this aromatic polyester fiber, although it is a sewing thread excellent in Young's modulus and strength, there is a problem that the texture is coarse and hard, and the refractive index is high, so that the coloring property is poor and the seam shrinkage is large, Luster with a luxurious feeling is far away, and since it is not biodegradable and easily decomposed in the natural environment, it has a defect that it remains semi-permanently unless incinerated when disposed. In addition, sewing thread for clothing usually requires seam quality, dyeing properties, and sewing threads without sewing shrinkage.
A stitch sewn with a high shrinkage thread such as an aromatic polyester thread could not withstand the shrinkage of the thread, causing puckering and degrading the stitch quality of the fabric. .
【0003】上述の課題を解決することで、縫い目品位
の向上および発色性を満足する縫糸の開発が要求されて
きた。
[0003] In order to solve the above-mentioned problems, there has been a demand for the development of a sewing thread which satisfies the improvement of the seam quality and the coloring property.
【0004】[0004]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の問題点を解決することにあり、脂肪族ポリエ
ステル繊維が有する光沢および発色性に富む特性を生か
し、縫い縮みを抑え縫い目品位に優れ、かつ自然環境中
で容易に分解できる縫糸を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to take advantage of the properties of aliphatic polyester fibers which are rich in luster and coloring, to suppress seam shrinkage, and to achieve seam quality. It is an object of the present invention to provide a sewing thread which is excellent in stiffness and can be easily decomposed in a natural environment.
【0005】[0005]
【課題を解決するための手段】上記の課題を解決するた
め、本発明の縫糸は以下の構成を採用する。 (1)下撚りが施されたマルチフィラメント糸条を2糸
条以上引き揃えて上撚りした縫糸において、該マルチフ
ィラメント糸条の少なくとも一部がL−乳酸を主成分と
する易分解性脂肪族ポリエステル繊維糸条からなり、か
つ、下撚り係数および上撚り係数がともに6,000〜
20,000であることを特徴とする特徴とする縫糸。 (2)乾熱収縮率と沸騰水収縮率を合わせた収縮率の関
係が次式を満足することを特徴とする前記(1)記載の
縫糸。
In order to solve the above-mentioned problems, the sewing thread of the present invention employs the following constitution. (1) In a sewing thread in which two or more multi-filament yarns subjected to a primary twist are drawn and twisted together, at least a part of the multi-filament yarn is an easily degradable aliphatic containing L-lactic acid as a main component. It is made of polyester fiber yarn, and both the lower twist coefficient and the upper twist coefficient are 6,000 or more.
A sewing thread characterized in that the thread has a weight of 20,000. (2) The sewing thread according to the above (1), wherein a relationship between a shrinkage ratio obtained by combining a dry heat shrinkage ratio and a boiling water shrinkage ratio satisfies the following expression.
【0006】−2.0≦KS+FS(%)≦5.0 (式中、KS:乾熱収縮率 (%)、 FS:沸騰水収縮
率(%)) (3)縫糸を構成する糸条の土中における強度低下率が
10%〜50%である前記(1)または(2)記載の縫
糸。
-2.0 ≦ KS + FS (%) ≦ 5.0 (where KS: dry heat shrinkage (%), FS: boiling water shrinkage (%)) (3) The yarn constituting the sewing thread The sewing thread according to the above (1) or (2), wherein the strength reduction rate in soil is 10% to 50%.
【0007】[0007]
【発明の実施の形態】以下、本発明の脂肪族ポリエステ
ル縫糸について詳細に説明する。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the aliphatic polyester thread of the present invention will be described in detail.
【0008】本発明の縫糸は、マルチフィラメント糸条
に下撚を施し、そのマルチフィラメント糸条を2糸条以
上引き揃えて上撚りした縫糸であり、その少なくとも一
部がL−乳酸を主成分とする易分解性脂肪族ポリエステ
ル繊維糸条で構成されている。
[0008] The sewing thread according to the present invention is a multifilament thread that is subjected to priming, two or more multifilament threads are aligned and then twisted, and at least a part of the thread is mainly composed of L-lactic acid. And a readily degradable aliphatic polyester fiber yarn.
【0009】この縫糸は、脂肪族ポリエステルの優れた
発色性を表現するために、下撚り係数および上撚り係数
をともに6,000〜20,000とすることにより、乾
熱収縮率と沸騰水収縮率を合わせた収縮率が−2%〜5
%となり、縫い縮みを抑え、縫い目品位に優れたものと
なる。収縮率が5%を超えると縫製された生地が収縮率
と同じ量の変形を余儀なくされ縫い縮みや型くずれが起
こり、縫い目品位に著しく劣る傾向を示す。
[0009] In order to express the excellent coloring property of the aliphatic polyester, both the lower twist coefficient and the upper twist coefficient are set to 6,000 to 20,000, so that the dry heat shrinkage and the boiling water shrinkage are reduced. The combined shrinkage rate is -2% to 5
%, The seam shrinkage is suppressed, and the seam quality is excellent. If the shrinkage exceeds 5%, the sewn fabric is forced to deform by the same amount as the shrinkage, resulting in seam shrinkage and loss of shape, which tends to significantly degrade the stitch quality.
【0010】本発明で用いられる脂肪族ポリエステルと
しては、ポリ乳酸、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等が挙げられ、これらのブ
レンド物や変性物等も用いることができる。
The aliphatic polyester used in the present invention includes polylactic acid, poly-3-hydroxypropionate, poly-3-hydroxybutyrate, poly-3-hydroxybutyrate valerate and the like. Blends and modified products can also be used.
【0011】縫糸を構成する糸条は合成繊維マルチフィ
ラメント糸からなり、少なくとも一部が脂肪族ポリエス
テル繊維糸条からなるものである。縫糸の構成は、脂肪
族ポリエステル繊維糸条100%あるいは、他の素材、
例えば、他のポリエステルからなるフィラメントやポリ
アミドフィラメントとの組み合わせであっても良い。し
かしながら、脂肪族ポリエステル繊維糸条100%使い
が最も好ましい構成である。
The thread constituting the sewing thread is composed of a synthetic fiber multifilament thread, and at least a part thereof is composed of an aliphatic polyester fiber thread. The composition of the sewing thread is 100% aliphatic polyester fiber thread or other material,
For example, a combination with a filament made of another polyester or a polyamide filament may be used. However, 100% use of the aliphatic polyester fiber yarn is the most preferable configuration.
【0012】本発明における脂肪族ポリエステル繊維糸
条としては、発色性向上のために屈折率は1.50以下
が好ましく、1.45以下がより好ましい。また、融点
が130℃よりも低い場合には、単糸間の融着の発生や
著しい低下、摩擦加熱時に溶融欠点が生じるなど縫い目
の品位が著しく低いものとなるため、本発明では、脂肪
族ポリエステルの融点は130℃以上が好ましく、15
0℃以上がより好ましく、170℃以上がさらに好まし
い。ここで融点とは、DSC測定によって得られた溶融
ピークのピーク温度を意味する。
The aliphatic polyester fiber yarn in the present invention has a refractive index of preferably 1.50 or less, more preferably 1.45 or less, in order to improve color developability. Further, when the melting point is lower than 130 ° C., the quality of the seam becomes extremely low, such as generation and remarkable reduction of fusion between the single yarns and melting defects during friction heating. The melting point of the polyester is preferably 130 ° C. or more,
0 ° C. or higher is more preferable, and 170 ° C. or higher is further preferable. Here, the melting point means a peak temperature of a melting peak obtained by DSC measurement.
【0013】物理化学特性から脂肪族ポリエステルとし
て最も望ましいポリマーとしては、L−乳酸を主成分と
するポリエステルを挙げることができる。L−乳酸を主
成分にするとは、構成成分の60重量%以上がL−乳酸
からなっていることを意味し、40重量%を超えない範
囲でD−乳酸を含有するポリエステルであってもよい。
The most desirable polymer as an aliphatic polyester from the viewpoint of physicochemical properties is a polyester containing L-lactic acid as a main component. Mainly containing L-lactic acid means that 60% by weight or more of the component is composed of L-lactic acid, and may be a polyester containing D-lactic acid in a range not exceeding 40% by weight. .
【0014】ポリ乳酸の製造方法としては、乳酸を原料
として一旦環状二量体であるラクチドを生成せしめ、そ
の後開環重合を行なう二段階のラクチド法と、乳酸を原
料として溶媒中で直接脱水縮合を行なう一段階の直接重
合法が知られている。本発明で用いられるポリ乳酸は、
いずれの製法によって得られたポリ乳酸であってもよ
い。ラクチド法によって得られるポリマーの場合には、
ポリマー中に含有される環状二量体が溶融紡糸時に気化
して糸斑の原因となるため、溶融紡糸以前の段階でポリ
マー中に含有される環状2量体の含有量を0.1重量%
以下とすることが望ましい。また、直接重合法の場合に
は、環状2量体に起因する問題が実質的にないため、製
糸性の観点からはより好適であるといえる。
[0014] Polylactic acid can be produced by a two-stage lactide method in which lactide is once produced from lactic acid as a raw material, followed by ring-opening polymerization, or by direct dehydration condensation in a solvent using lactic acid as a raw material. Is known as a one-step direct polymerization method. Polylactic acid used in the present invention,
Polylactic acid obtained by any of the production methods may be used. In the case of polymers obtained by the lactide method,
Since the cyclic dimer contained in the polymer is vaporized at the time of melt spinning and causes thread spots, the content of the cyclic dimer contained in the polymer before the melt spinning is 0.1% by weight.
It is desirable to make the following. Further, in the case of the direct polymerization method, since there is substantially no problem caused by the cyclic dimer, it can be said that it is more preferable from the viewpoint of the spinning property.
【0015】ポリ乳酸の平均分子量は高いほど好まし
く、通常少なくとも5万、好ましくは少なくとも10
万、より好ましくは10〜30万である。平均分子量が
5万よりも低い場合には、繊維の強度物性が低下するた
め好ましくない。
The higher the average molecular weight of the polylactic acid, the better, usually at least 50,000, preferably at least 10
And more preferably 100,000 to 300,000. If the average molecular weight is lower than 50,000, the strength physical properties of the fiber are undesirably reduced.
【0016】また、本発明におけるポリ乳酸は、L−乳
酸、D−乳酸のほかに、エステル形成能を有するその他
の成分を共重合した共重合ポリ乳酸であってもよい。共
重合可能な成分としては、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など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。
The polylactic acid in the present invention may be a copolymerized polylactic acid obtained by copolymerizing other components having an ester-forming ability in addition to L-lactic acid and D-lactic acid. Examples of copolymerizable components include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid,
In addition to hydroxycarboxylic acids such as 6-hydroxycaproic acid, ethylene glycol, propylene glycol,
Compounds having a plurality of hydroxyl groups in a molecule such as butanediol, neopentyl glycol, polyethylene glycol, glycerin, pentaerythritol or derivatives thereof, adipic acid, sebacic acid, fumaric acid, terephthalic acid, isophthalic acid, 2,6 -Naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid, 5-tetrabutylphosphonium isophthalic acid, and other compounds containing a plurality of carboxylic acid groups in the molecule or derivatives thereof.
【0017】また、脂肪族ポリエステルの溶融粘度を低
減させるため、ポリカプロラクトン、ポリブチレンサク
シネートおよびポリエチレンサクシネートのような脂肪
族ポリエステルポリマーを内部可塑剤として、あるいは
外部可塑剤として用いることができる。さらには、脂肪
族ポリエステルに、艶消し剤、消臭剤、難燃剤、糸摩擦
低減剤、抗酸化剤、着色顔料等として無機微粒子や有機
化合物を必要に応じて添加することができる。
In order to reduce the melt viscosity of the aliphatic polyester, an aliphatic polyester polymer such as polycaprolactone, polybutylene succinate and polyethylene succinate can be used as an internal plasticizer or an external plasticizer. Further, inorganic fine particles and organic compounds as a matting agent, a deodorant, a flame retardant, a yarn friction reducing agent, an antioxidant, a coloring pigment and the like can be added to the aliphatic polyester as required.
【0018】脂肪族ポリエステル繊維の溶融紡糸方法と
しては、公知の溶融紡糸装置を用いて紡糸することがで
き、断面形状を丸断面だけではなく、口金孔をそれぞれ
対応する異形断面用とすることにより異形断面糸も製造
することができる。例えば、3葉断面繊維を得る場合に
は、T字型或いはY字型口金孔を有する口金を用いれば
よい。
As the melt spinning method of the aliphatic polyester fiber, spinning can be performed by using a known melt spinning apparatus. Not only the round cross section but also the cap holes for the corresponding irregular cross sections can be used. Profiled yarns can also be produced. For example, when obtaining a three-lobe fiber, a base having a T-shaped or Y-shaped base hole may be used.
【0019】本発明において、脂肪族ポリエステル繊維
糸条からなる縫糸は、下撚り/上撚り係数がともに6,
000〜20,000であることが好ましく、8,00
0〜16,000であることがより好ましい。下撚りま
たは上撚り係数が6,000より小さい場合、あるいは
20,000を超える撚り係数で構成された縫糸は、高
速可縫中に糸切れしたり、縫目品位が低下する。この撚
り係数は、構成するフィラメント糸の繊度や下撚/上撚
の撚バランスによって、適宜決めることができる。撚り
係数の算出法は、撚り係数(K)=撚り数×√(デニー
ル数)である。
In the present invention, the sewing thread composed of the aliphatic polyester fiber thread has a lower twist / first twist coefficient of 6,
000 to 20,000, preferably 8,000
More preferably, it is 0 to 16,000. When the lower twist or upper twist coefficient is less than 6,000, or a sewing thread constituted with a twist coefficient exceeding 20,000, thread breakage occurs during high-speed sewing and the stitch quality is reduced. The twist coefficient can be determined as appropriate depending on the fineness of the constituent filament yarns and the twist balance of the first twist / first twist. The method of calculating the twist coefficient is: twist coefficient (K) = twist number × √ (denier number).
【0020】本発明の縫糸は、高光沢、高発色性であ
り、かつ自然環境中で容易に分解する特性として、土中
における強度低下率が1年間で好ましくは10%〜50
%であり、生分解性生地用として好適な脂肪族ポリエス
テル縫糸である。また、この縫糸は、乾熱収縮率と沸騰
水収縮率を合わせた収縮率が−2%〜5%とすることで
縫い縮み、縫い目の型くずれを抑え、染色性に優れ、同
時に縫い目品位を向上させることができる。本発明にお
いては、例えば、下撚り/上撚り係数を6,000〜2
0,000、好ましくは8,000〜16,000とす
ることで、乾熱収縮率と沸騰水収縮率を合わせた収縮率
を−2%〜5%とすることができる。
The sewing thread of the present invention has a high gloss, a high color developing property, and a property of easily decomposing in a natural environment.
%, Which is an aliphatic polyester thread suitable for biodegradable fabrics. In addition, this sewing thread has a shrinkage ratio of -2% to 5%, which is a combination of dry heat shrinkage ratio and boiling water shrinkage ratio, suppresses seam shrinkage, suppresses seam deformation, is excellent in dyeability, and simultaneously improves seam quality. Can be done. In the present invention, for example, the ply twist / twist coefficient is 6,000 to 2
By setting it to 0000, preferably 8,000 to 16,000, the combined shrinkage of dry heat and shrinkage of boiling water can be set to -2% to 5%.
【0021】本発明における脂肪族ポリエステル繊維縫
糸は、その繊維の強度が2.65cN/dtex以上で
あることが好ましい。強度が2.65cN/dtex未
満の場合には、縫製時の糸切れや、縫い目品位および縫
糸引裂強力低下による製品強度の低下を招くため好まし
くない。繊維の強度は、より好ましくは3.1cN/d
tex以上であり、最も好ましくは3.5cN/dte
x以上である。ここでは繊維強度の上限は特定されない
が、通常の上限値としては、4.5cN/dtexが挙
げられる。
The aliphatic polyester fiber sewing thread in the present invention preferably has a fiber strength of 2.65 cN / dtex or more. If the strength is less than 2.65 cN / dtex, it is not preferable because thread breakage at the time of sewing or a decrease in product strength due to a decrease in seam quality and sewing tear strength is not preferred. The fiber strength is more preferably 3.1 cN / d
tex or more, most preferably 3.5 cN / dte
x or more. Here, the upper limit of the fiber strength is not specified, but a typical upper limit is 4.5 cN / dtex.
【0022】また、本発明の脂肪族ポリエステル繊維か
らなる縫糸の伸度は、残留伸度が10〜50%程度とな
るように、原糸、加工条件を設定することが、縫製時の
取り扱い性、縫い目の衝撃耐久性からみて好ましい。
The elongation of the sewing thread made of the aliphatic polyester fiber of the present invention can be adjusted by setting the original yarn and the processing conditions so that the residual elongation is about 10 to 50%. It is preferable from the viewpoint of seam impact durability.
【0023】本発明では、例えば、下記の紡糸条件によ
り得られた延伸糸を用い、撚り係数を8000〜160
00の範囲で加工することにより、伸度10〜50%の
縫糸を得ることができる。
In the present invention, for example, a drawn yarn obtained under the following spinning conditions is used, and the twist coefficient is 8000 to 160.
By processing in the range of 00, a sewing thread having an elongation of 10 to 50% can be obtained.
【0024】融点が172℃で、屈折率が1.45であ
るポリL−乳酸のチップを、60℃に設定した真空乾燥
器で48hr乾燥し、乾燥したチップを紡糸温度220
℃、紡糸速度3,000m/minで引き取って122
T−36Fの未延伸糸を得る。得られた未延伸糸を延伸
温度80℃、熱セット温度115℃、延伸倍率1.45
倍で延伸し、84T−36Fの延伸糸を得る。得られた
ポリ乳酸フィラメントは80.3dtex/36フィラ
メント、強度3.0cN/dtexである。そのフィラ
メント糸条をS方向に980T/m施撚し、下撚糸条を
得る。次に、下撚糸条を3本引き揃え、通常の合撚機を
使用してZ方向に750T/mの上撚りを行い、縫糸用
糸条を得る。
A poly L-lactic acid chip having a melting point of 172 ° C. and a refractive index of 1.45 was dried for 48 hours in a vacuum dryer set at 60 ° C., and the dried chip was spun at a spinning temperature of 220 ° C.
At a spinning speed of 3,000 m / min.
An undrawn yarn of T-36F is obtained. The obtained undrawn yarn is drawn at a temperature of 80 ° C, a heat setting temperature of 115 ° C, and a draw ratio of 1.45.
Draw twice to obtain a drawn yarn of 84T-36F. The obtained polylactic acid filament has an 80.3 dtex / 36 filament and a strength of 3.0 cN / dtex. The filament yarn is twisted at 980 T / m in the S direction to obtain a lower twist yarn. Next, three lower twisted yarns are aligned and the upper twist is performed at 750 T / m in the Z direction using a normal twisting machine to obtain a yarn for sewing.
【0025】本発明の脂肪族ポリエステル繊維からなる
縫糸は、次のようにして製造することができる。脂肪族
ポリエステルフィラメント糸条をS方向に980T/m
施撚し、下撚り糸条を得る。次に、この下撚り糸条を3
本引き揃え、通常の合撚機を使用してZ方向に750T
/mの上撚りを行ない、縫糸用糸条とする。
The sewing thread comprising the aliphatic polyester fiber of the present invention can be manufactured as follows. 980 T / m of aliphatic polyester filament yarn in S direction
Twisting to obtain a sub-twisted yarn. Next, the lower twisted yarn is
750T in the Z direction using a regular twisting machine
/ M to give a thread for sewing.
【0026】次いで、この縫糸用糸条を通常のソフトワ
インダーにて染色用ボビンに捲き取り、通常のパッケー
ジ染色機を用いて温度120℃で染色処理を行なう。次
いで、湯洗、水洗後、脱水、乾燥し、通常のコーンワイ
ンダーにて捲き直しを行ない、本発明のポリ乳酸フィラ
メント100%使いの縫糸を得ることができる。
Next, the thread for sewing is wound around a bobbin for dyeing with a normal soft winder, and dyed at a temperature of 120 ° C. using a normal package dyeing machine. Next, after washing with hot water and water, dehydration and drying are performed, followed by rewinding with a normal corn winder to obtain a suture using 100% of the polylactic acid filament of the present invention.
【0027】また、繊維断面に制限はなく、異形断面に
より光沢を利用したり、中空繊維により軽量化を図るこ
とは好ましく行なわれる。同様に、繊度に制限はない
が、通常単糸繊度0.5デニールから10デニール程度
の繊維が好ましく用いられる。また、縫糸のトータル繊
度は22〜500Dtexが好ましい。
The cross section of the fiber is not limited, and it is preferable to use gloss with a modified cross section or to reduce the weight by using hollow fibers. Similarly, the fineness is not limited, but fibers having a single-filament fineness of about 0.5 denier to about 10 denier are preferably used. Further, the total fineness of the sewing thread is preferably 22 to 500 Dtex.
【0028】本発明の縫糸は、通常の布帛の縫製に用い
られるが、特に脂肪族ポリエステル繊維糸からなる衣料
用等の布帛に好適に用いられる。すなわち、縫糸と生地
を共に生分解性の糸にするとことで両者ともに分解さ
れ、環境への影響が少なく、また発色性に優れているた
め、製品染めに用いると最適である。
The sewing thread of the present invention is used for sewing ordinary fabrics, but is particularly suitably used for clothing and the like made of aliphatic polyester fiber yarns. That is, since both the sewing thread and the fabric are made of biodegradable threads, they are both decomposed, have little effect on the environment, and have excellent coloring properties. Therefore, they are optimally used for dyeing products.
【0029】このように本発明の縫糸の用途は、脂肪族
ポリエステル繊維、木綿、レーヨン等の自然環境中で分
解可能な生地用の縫糸として最適である。その他の用途
としては、医療用服用縫い糸に好適に適用することがで
きる。
As described above, the use of the sewing thread of the present invention is most suitable as a sewing thread for a fabric which can be decomposed in a natural environment such as aliphatic polyester fiber, cotton, rayon and the like. As other uses, it can be suitably applied to a sewing thread for medical clothing.
【0030】[0030]
【実施例】以下、実施例を挙げて本発明を具体的に説明
する。
The present invention will be specifically described below with reference to examples.
【0031】なお、実施例および比較例における測定値
は、次の方法で得たものである。
The measured values in the examples and comparative examples were obtained by the following methods.
【0032】 (1)原糸強度(cN/dtex)及び原糸伸度(%) JIS−L−1073に記載される引張試験に準じ、イ
ンストロン型引張試験機を用いて測定した。
(1) Raw yarn strength (cN / dtex) and raw yarn elongation (%) According to a tensile test described in JIS-L-1073, it was measured using an Instron type tensile tester.
【0033】(2)縫糸繊度 通常の検尺機を用いてサンプル長90mを5本採取し、
重量を平均した。
(2) Fineness of sewing thread Five samples of 90 m in length were collected using a normal measuring machine.
The weight was averaged.
【0034】Y(dtex)=1.111×デニール (3)縫糸破断伸度(%)および縫糸破断強力(kg) JIS−L−2511に記載される引張試験に準じ、イ
ンストロン型引張試験機を用いて試長25cm、引張速
度30cm/minで測定した。
Y (dtex) = 1.111 × denier (3) Suture breaking elongation (%) and suture breaking strength (kg) Instron type tensile tester according to the tensile test described in JIS-L-2511 Was measured at a test length of 25 cm and a tensile speed of 30 cm / min.
【0035】(4)下撚り/上撚り係数 撚り係数の定義を、撚り係数(K)=撚り数×√(デニ
ール数)とし、算出した。
(4) Lower Twist / Fon Twist Coefficient The twist coefficient was defined as twist coefficient (K) = twist number × √ (denier number).
【0036】ここで、Tは下撚り/上撚り数(T/
m)、Kは下撚り/上撚り係数、Dは縫糸繊度(dte
x)をいう。
Here, T is the number of ply twists / twist twists (T /
m), K is the primary / twist coefficient, D is the thread fineness (dte
x).
【0037】(5)実測下撚り/上撚り数 通常の検撚機を用いて、試長25cmで10回測定し、
平均値を算出した。
(5) Actually Measured Twist Twist / Over Twist The number was measured 10 times with a test length of 25 cm using a normal twisting machine.
The average was calculated.
【0038】(6)土中における強度低下率 本発明の縫糸を、土中深さ10(cm)部へ埋め、半年
おきに縫糸の強度を測定し、土中に埋める前の縫糸をL
1,土中から取り出した縫糸をL2とした。強度低下率
を以下の式より算出した。
(6) Decrease in strength in soil The suture of the present invention is buried at a depth of 10 cm in the soil, the strength of the suture is measured every six months, and the suture before embedding in the soil is L
1. The sewing thread taken out of the soil was designated as L2. The strength reduction rate was calculated from the following equation.
【0039】強度低下率(L)=L2/L1 (%) (7)乾熱収縮率 JIS−L−1013、8.18.2 カセ収縮率
(A)法に準じ測定した。
Strength reduction ratio (L) = L2 / L1 (%) (7) Dry heat shrinkage ratio Measured according to JIS-L-1013, 8.18.2 scab shrinkage ratio (A) method.
【0040】(8)沸騰水収縮率 JIS規格L1090−1992 5.10熱水収縮率
A法(かせ収縮率)に準じ測定した。
(8) Boiling water shrinkage ratio 5.10 Hot water shrinkage ratio Measured in accordance with JIS standard L1090-1992 A method (skew shrinkage ratio).
【0041】[実施例1]融点が172℃で、屈折率が
1.45であるポリL−乳酸のチップを、60℃に設定
した真空乾燥器で48hr乾燥し、乾燥したチップを紡
糸温度220℃、紡糸速度3,000m/minで引き
取って122T−36Fの未延伸糸を得た。得られた未
延伸糸を延伸温度80℃、熱セット温度115℃、延伸
倍率1.45倍で延伸し、84T−36Fの延伸糸とし
た。得られたポリ乳酸フィラメントは80.3dtex
−36フィラメント、強度3.0cN/dtexであっ
た。該フィラメント糸条を撚り係数8500より、S方
向に980T/m施撚し、下撚糸条を得た。次に、下撚
糸条を3本引き揃え、通常の合撚機を使用して撚り係数
11000より、Z方向に750T/mの上撚りを行な
い、縫糸用糸条を得た。 [実施例2]実施例1と同様
に紡糸・延伸を行い、80.6dtex−36fの延伸糸を
得た。
Example 1 A poly L-lactic acid chip having a melting point of 172 ° C. and a refractive index of 1.45 was dried for 48 hours in a vacuum dryer set at 60 ° C., and the dried chip was spun at a spinning temperature of 220 ° C. C. at a spinning speed of 3,000 m / min to obtain an undrawn yarn of 122T-36F. The obtained undrawn yarn was drawn at a drawing temperature of 80 ° C., a heat setting temperature of 115 ° C., and a draw ratio of 1.45 to obtain a drawn yarn of 84T-36F. The obtained polylactic acid filament is 80.3 dtex
-36 filaments, strength was 3.0 cN / dtex. The filament yarn was twisted at 980 T / m in the S direction from a twist coefficient of 8500 to obtain a lower twist yarn. Next, three lower twisted yarns were aligned and the upper twist was performed in the Z direction at 750 T / m with a twist factor of 11000 using a normal twisting machine to obtain a yarn for sewing. [Example 2] Spinning and drawing were performed in the same manner as in Example 1 to obtain a drawn yarn of 80.6 dtex-36f.
【0042】得られた該ポリ乳酸フィラメント糸条を撚
り係数13000より、S方向に1485T/m施撚
し、下撚糸条を得た。次に、下撚糸条を3本引き揃え、
通常の合撚機を使用して撚り係数13000より、Z方
向に857T/mの上撚りを行ない、縫糸用糸条を得
た。
The obtained polylactic acid filament yarn was twisted at 1485 T / m in the S direction from a twist coefficient of 13000 to obtain a lower twist yarn. Next, three lower twisted yarns are aligned.
Using a normal twisting machine, a twist of 857 T / m was performed in the Z direction with a twist factor of 13000 to obtain a thread for sewing.
【0043】[比較例1]ポリエステルマルチフィラメ
ント81.3dtex−36フィラメントを撚り係数850
0より、S方向に980T/m施撚し、下撚糸条を得
た。次に、下撚糸条を3本引き揃え、撚り係数8500
より、Z方向に750T/mの上撚りを行ない、縫糸用
糸条を得た。
Comparative Example 1 Polyester multifilament 81.3 dtex-36 filament was twisted at 850.
From 0, 980 T / m was twisted in the S direction to obtain a lower twisted yarn. Next, three lower twisted yarns are aligned and a twist coefficient of 8500
From above, 750 T / m was twisted in the Z direction to obtain a thread for sewing.
【0044】[比較例2]ポリエステルマルチフィラメ
ント81.3dtex−36フィラメントを撚り係数130
00より、S方向に1485T/m施撚し、下撚糸条を
得た。次に、下撚糸条を3本引き揃え、撚り係数130
00より、Z方向に867T/mの上撚りを行ない、縫
糸用糸条を得た。次いで、この縫糸用糸条を通常のソフ
トワインダーにて染色用ボビンに巻き取り、パッケージ
染色機を用いて温度120℃で染色処理を行った。次い
で、湯洗、水洗後、脱水、乾燥し、通常のコーンワイン
ダーにて巻き直しを行い、縫糸を得た。脂肪族ポリエス
テルフィラメント縫糸、ポリエステルフィラメント縫糸
を得た。得られた縫糸の性能を測定し、その結果を表1
に示した。
[Comparative Example 2] Polyester multifilament 81.3 dtex-36 filament was prepared with a twist coefficient of 130.
From 00, twisting was performed at 1485 T / m in the S direction to obtain a lower twisted yarn. Next, three lower twisted yarns are aligned and the twist coefficient is 130.
From 00, 867 T / m was first twisted in the Z direction to obtain a thread for sewing. Next, the thread for sewing was wound around a bobbin for dyeing with a normal soft winder, and dyed at a temperature of 120 ° C. using a package dyeing machine. Next, after washing with hot water and water, dehydration and drying were performed, and rewinding was performed with a normal cone winder to obtain a sewing thread. An aliphatic polyester filament thread and a polyester filament thread were obtained. The performance of the obtained suture was measured, and the results are shown in Table 1.
It was shown to.
【0045】次いで、この縫糸用糸条を通常のソフトワ
インダーにて染色用ボビンに捲き取り、通常のパッケー
ジ染色機を用いて温度120℃で染色処理を行なった。
次いで、湯洗、水洗後、脱水、乾燥し、通常のコーンワ
インダーにて捲き直しを行ない、本発明のポリ乳酸フィ
ラメント100%使いの縫糸を得た。得られた縫糸の性
能を測定し、その結果を表1に示した。
Next, the thread for sewing was wound up on a bobbin for dyeing with an ordinary soft winder, and dyed at a temperature of 120 ° C. using an ordinary package dyeing machine.
Next, after washing with hot water and water, dehydration and drying were performed, followed by rewinding with a normal cone winder to obtain a sewing thread using 100% of the polylactic acid filament of the present invention. The performance of the obtained sewing thread was measured, and the results are shown in Table 1.
【0046】[0046]
【表1】 [Table 1]
【0047】表1から明らかなように、実施例1、実施
例2の縫糸の乾熱収縮率と沸騰水収縮率をあわせた収縮
率が3.2%、4.7%と収縮が抑えられているため、
ポリ乳酸繊維生地の縫い目の縫い縮みおよび型くずれが
ないことを肉眼で確認した。乾熱処理時の収縮率が−
0.8%となるのは、加熱処理すると縫糸自体がわずか
ながら自発伸長することにより、縫目における縫い縮み
お抑え、型くずれがなく、縫糸として最適な特性を有す
る。しかしながら、比較例1,比較例2では、乾熱収縮
率と沸騰水収縮率のあわせた収縮率が共に高く、縫い目
の縫い縮みおよび型くずれが発生した。
As apparent from Table 1, the shrinkage of the sewing threads of Examples 1 and 2 was 3.2%, 4.7%, which is the sum of the dry heat shrinkage and the boiling water shrinkage, and the shrinkage was suppressed. Because
It was visually confirmed that there was no seam shrinkage or shape loss of the seam of the polylactic acid fiber fabric. -Shrinkage rate during dry heat treatment
The ratio of 0.8% is as follows: when the heat treatment is performed, the sewing thread itself slightly expands spontaneously, thereby suppressing the seam shrinkage at the seam, preventing the shape from being lost, and having optimum characteristics as the sewing thread. However, in Comparative Examples 1 and 2, the combined shrinkage ratios of the dry heat shrinkage ratio and the boiling water shrinkage ratio were both high, and seam shrinkage and shape loss occurred.
【0048】実施例での縫糸の強度低下率を半年間で4
7%、40%となり、実際に自然環境中で生分解が容易
に行なわれることを証明できる。これに対し、比較例で
は、縫糸の収縮率が高く、縫い目における縫い縮みに対
応できずに型くずれが発生しており、縫目品位に劣って
いた。また、土中における生分解性においても、芳香族
ポリエステルは自然環境中における耐久性が極めて高
く、自然環境中で容易に分解しないため、廃棄に際して
は焼却処理を行わない限り、半永久的に残存する。
In the embodiment, the rate of decrease in the strength of the sewing thread was 4
It is 7% and 40%, which proves that biodegradation is actually easily performed in the natural environment. On the other hand, in the comparative example, the shrinkage rate of the sewing thread was high, the shape could not be coped with the seam shrinkage at the seam, and the shape collapsed, and the seam quality was poor. In addition, in terms of biodegradability in soil, aromatic polyesters have extremely high durability in the natural environment and do not easily decompose in the natural environment. Therefore, they remain semi-permanently unless incinerated when disposed. .
【0049】[0049]
【発明の効果】本発明の縫糸は、縫糸にした際に光沢、
発色性に優れ、乾熱収縮率と沸騰水収縮率を合わせた収
縮率の範囲を−2%〜5%にすることにより、縫目の縫
い縮み、型くずれを解決し、縫い目品位に優れることが
特徴とし、また土中の強度低下率を10%〜50%とす
ることで自然環境中で容易に分解することができるため
地球環境に優しい縫糸である。
The sewing thread of the present invention has a luster when used as a sewing thread.
Excellent color developability. By setting the range of shrinkage, which is a combination of dry heat shrinkage and boiling water shrinkage, to -2% to 5%, seam shrinkage and shape loss can be solved, and seam quality can be improved. It is a globally friendly sewing thread because it can be easily decomposed in the natural environment by setting the strength reduction rate in soil at 10% to 50%.

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 下撚りが施されたマルチフィラメント糸
    条を2糸条以上引き揃えて上撚りした縫糸において、該
    マルチフィラメント糸条の少なくとも一部がL−乳酸を
    主成分とする易分解性脂肪族ポリエステル繊維糸条から
    なり、かつ、下撚り係数および上撚り係数がともに6,
    000〜20,000であることを特徴とする特徴とす
    る縫糸。
    An easily decomposable yarn comprising at least a part of L-lactic acid as a main component, wherein at least a part of the multifilament yarn is made of L-lactic acid as a main component in a multi-filament yarn which has been subjected to a primary twist and two or more yarns are aligned and then super-twisted. It is made of an aliphatic polyester fiber yarn, and both the lower twist coefficient and the upper twist coefficient are 6,
    000 to 20,000.
  2. 【請求項2】 乾熱収縮率と沸騰水収縮率を合わせた収
    縮率の関係が、次式を満足することを特徴とする請求項
    1記載の縫糸。 −2.0≦KS+FS(%)≦5.0 (式中、KS: 乾熱収縮率 (%)、FS: 沸騰水収
    縮率(%))
    2. The sewing thread according to claim 1, wherein a relationship between a shrinkage ratio of the dry heat shrinkage ratio and a boiling water shrinkage ratio satisfies the following expression. −2.0 ≦ KS + FS (%) ≦ 5.0 (where KS: dry heat shrinkage (%), FS: boiling water shrinkage (%))
  3. 【請求項3】 縫糸を構成する糸条の土中における強度
    低下率が10%〜50%とすることを特徴とする請求項
    1または2記載の縫糸。
    3. The sewing thread according to claim 1, wherein the strength reduction rate of the thread constituting the sewing thread in the soil is 10% to 50%.
JP2001020316A 2001-01-29 2001-01-29 Sewing yarn Pending JP2002227050A (en)

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EP1564316A1 (en) * 2004-02-12 2005-08-17 Nisshinbo Industries, Inc. A fiber article comprising a biodegradable plastic
JP2006118061A (en) * 2004-10-19 2006-05-11 Toray Ind Inc Core yarn sewing thread
JP2016006244A (en) * 2014-05-29 2016-01-14 Tmtマシナリー株式会社 Thread cutter
WO2019069660A1 (en) * 2017-10-05 2019-04-11 株式会社村田製作所 Piezoelectric fibers

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EP1564316A1 (en) * 2004-02-12 2005-08-17 Nisshinbo Industries, Inc. A fiber article comprising a biodegradable plastic
US7129190B2 (en) 2004-02-12 2006-10-31 Nisshinbo Industries, Inc. Fiber article comprising a biodegradable plastic
CN100398709C (en) * 2004-02-12 2008-07-02 日清纺绩株式会社 A fiber article comprising a biodegradable plastic
JP2006118061A (en) * 2004-10-19 2006-05-11 Toray Ind Inc Core yarn sewing thread
JP2016006244A (en) * 2014-05-29 2016-01-14 Tmtマシナリー株式会社 Thread cutter
WO2019069660A1 (en) * 2017-10-05 2019-04-11 株式会社村田製作所 Piezoelectric fibers

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