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JP3973539B2 - Easy fibrillar polyester yarn - Google Patents

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Publication number
JP3973539B2
JP3973539B2 JP2002323570A JP2002323570A JP3973539B2 JP 3973539 B2 JP3973539 B2 JP 3973539B2 JP 2002323570 A JP2002323570 A JP 2002323570A JP 2002323570 A JP2002323570 A JP 2002323570A JP 3973539 B2 JP3973539 B2 JP 3973539B2
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Japan
Prior art keywords
polyester
yarn
polyester yarn
woven
fiber
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JP2004156172A (en
Inventor
智秋 田代
啓次郎 服部
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Teijin Frontier Co Ltd
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Teijin Fibers Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、織編物表面で均一にフィブリル化するポリエステル糸およびその混繊糸に関する。
【0002】
【従来の技術】
従来、織編物表面に毛羽状外観を付与する方法として、有機スルホン酸金属塩などを添加配合したポリエステルからなる繊維を織編物となし、織編物表面にアルカリ処理を施してバッフィング処理を行うか、若しくはバッフィング処理を施した後アルカリ加水分解処理を行うことにより、ポリエステル繊維をミクロフィブリル化して織編物表面に毛羽を形成せしめる方法が開示されている(例えば、特許文献1参照)。しかし、ポリエステルに非相溶である有機スルホン酸金属塩などをブレンドして得られるポリエステル繊維では、有機スルホン酸金属塩などのポリエステル繊維内での分散状態をコントロールすることが難しく、織編物を構成する繊維間でフィブリル化の程度に斑が生じ、織編物の表面に筋状の斑が発生し、織物品位が劣化するという問題があった。
【0003】
また、ポリエステルポリマーと非相溶の長鎖状有機化合物および/または有機スルホン酸金属塩を添加配合したポリエステルからなる繊維を織編物となし、織編物に凹凸加工あるいはエンボス加工などとアルカリ処理とを組み合わせて織物表面のポリエステル繊維を部分的にフィブリル化する方法が開示されている(例えば、特許文献2および特許文献3参照)。しかし、前記の方法で提示されているポリエステルポリマーと非相溶の長鎖状有機化あるいは有機スルホン酸金属塩を添加配合したポリエステル繊維からなる織編物を、カレンダーロールなどを用いて織編物全表面を加圧しフィブリル化した場合、織編物の表面に筋状の斑が発生し、織物品位が劣化するという問題があった。
【0004】
【特許文献1】
特開昭58−298457号公報
【0005】
【特許文献2】
特開平7−197375号公報
【0006】
【特許文献3】
特開平11−36181号公報
【0007】
【発明が解決しようとする課題】
本発明は、上記従来技術を背景になされたもので、その目的は、織編物表面で均一にフィブリル化され、織編物表面に優れた毛羽状外観を発現することができる易フィブリル性ポリエステル糸を提供することにある。
【0008】
【課題を解決するための手段】
本発明者は、上記従来技術に鑑み、鋭意検討を重ねた結果、本発明を完成するに至った。すなわち、本発明の目的は、「芳香族系ポリエステルからなるフィラメント糸であって、下記式(I)で表されるポリオキシエチレン系ポリエーテルを繊維重量基準で0.5〜2.0%および下記式(II)で表される有機金属スルホン酸塩を繊維重量基準で0.1〜1.0%含有することを特徴とする易フィブリル性ポリエステル糸」によって達成される。
【0009】
【化3】

Figure 0003973539
【0010】
【化4】
Figure 0003973539
【0011】
【発明の実施の形態】
以下本発明の実施形態について詳細に説明する。
本発明でいう芳香族系ポリエステルとは、芳香環を重合体の主たる繰り返し単位とする芳香族系ポリエステルである。好ましい芳香族系ポリエステルとしては、ポリエチレンテレフタレート、ポリプロピレンテレフタレート、ポリブチレンテレフタレートなどをあげることができる。また、酸成分および/またはグリコール成分以外の成分を少量共重合したポリエステルであっても良い。なかでも、ポリエチレンテレフタレート、ポリプロピレンテレフタレートおよびそれらの共重合体が織編物用途に適した機械的性質を有しているので好ましく用いることができる。
【0012】
なお、該芳香族系ポリエステルは、本発明の効果を阻害しない範囲で、必要に応じて少量の添加剤、例えば滑剤、顔料、染料、酸化防止剤、固相重合促進剤、蛍光増白剤、帯電防止剤、抗菌剤、紫外線吸収剤、光安定剤、熱安定剤、遮光剤、艶消剤等を含んでいても良い。
【0013】
本発明の易フィブリル性ポリエステル糸は、下記式(I)で表されるポリオキシエチレン系ポリエーテルを繊維重量基準で0.5〜2.0%および下記式(II)で表される有機金属スルホン酸塩を繊維重量基準で0.1〜1.0%含有していることが肝要である。
【0014】
【化5】
Figure 0003973539
【0015】
【化6】
Figure 0003973539
【0016】
該ポリオキシエチレン系ポリエーテルは、上記式(I)から明らかなように、−Cj2j+1および−Cj'2j'+1で表される枝わかれ部分を持つ鎖(以下おのおのA鎖ブロックおよびA’鎖ブロックと称する)と枝分かれの無い直鎖(以下B鎖ブロックと称する)からなる非ランダム共重合ポリオキシエチレン系ポリエーテルである。この時、上記JおよびJ’は13〜28、好ましくは14〜20の範囲である。JおよびJ’が13未満の場合は、繊維のフィブリル化が不均一となり、織編物表面に筋状の斑が発生する。JおよびJ’が28を超える場合は、充分な繊維のフィブリル化が起こらなくなる。
【0017】
さらに、B鎖ブロックの分子量(MwB)と、A鎖ブロックおよびA’鎖ブロック(AおよびA’)との合計分子量(MwA)との比(以下MwA/MwBと称する)が0.2〜1.2、好ましくは0.25〜1.0であることが必要である。MwA/MwBが0.2未満の場合は、B鎖ブロックが長くなり過ぎ、あるいは、AおよびA’鎖ブロックの枝の長さが短くなり過ぎて、繊維のフィブリル化が起こらなくなる。MwA/MwBが1.2を超える場合には、AおよびA’鎖ブロックが長くなり過ぎ、あるいは、B鎖ブロックの枝の長さが短くなり過ぎて、繊維のフィブリル化が不均一となり、織編物表面に筋状の斑が発生する。
【0018】
このようなポリオキシエチレン系ポリエーテルの繊維フィブリル化効果は、次のようなメカニズムによって発現すると推定される。すなわち、該ポリオキシエチレン系ポリエーテルが、ポリエステルポリマーの繊維化過程で分子単位の伸張を受け、直鎖部分の両端にある枝分かれ部分が、ポリエステル分子に対してアンカー効果を発現し、ポリオキシエチレン系ポリエーテルの直鎖部分がポリエステル分子の伸張とともに引き伸ばされた状態で細化すると推定される。このような分子構造で細化されたポリエステル繊維では、アルカリ処理等のフィブリル化処理を受けた時、引き伸ばされたポリオキシエチレン系ポリエーテル分子に沿って繊維軸方向に、均一なフィブリルが生じるものと推定される。
【0019】
また、該ポリオキシエチレン系ポリエーテル含有量は、繊維重量基準で0.5〜2.0%、好ましくは、1.0〜2.0%でなければならない。ポリオキシエチレン系ポリエーテルの含量が0.5%未満では、繊維のフィブリル化が充分に進行しない。また、ポリオキシエチレン系ポリエーテル含量が2.0%を超える場合には、過度のフィブリル化が起こり、フィブリルの脱落や、マルチフィラメント糸の強度低下が起こる。
【0020】
なお、該ポリオキシエチレン系ポリエーテルの重量平均分子量は、5000〜16000、より好ましくは5500〜14000の範囲が適切である。
【0021】
次に、本発明の易フィブリル性ポリエステル糸には、上述のポリオキシエチレン系ポリエーテルとともに、前述の式(II)で表される有機金属スルホン酸塩が含有されている。該有機金属スルホン酸塩は、単一の化合物であっても、各種のアルキル基あるいはアルキルアリール基を有する有機スルホン酸金属塩の混合物であっても良い。
【0022】
具体的には、ステアリルスルホン酸ナトリウム、ドデシルベンゼンスルホン酸ナトリウム、ドデシルベンゼンスルホン酸テトラブチルホスホニウムおよび上記の混合物などを例示することができる。このような有機金属スルホン酸塩は、アルカリ処理等のフィブリル化処理工程で、繊維の分子構造中で、フィブリル化の基点となり、繊維全体にわたり均一なフィブリル化を進行させる役割を果たしていると推定される。
【0023】
また、該有機金属スルホン酸塩含有量は、繊維重量基準で0.1〜1.0%、好ましくは、0.2〜0.7%でなければならない。有機金属スルホン酸塩の含有量が0.1%未満の場合、繊維のフィブリル化が充分に進行しなかったり、不均一なフィブリルが発生したりする。含有量が1.0%を越える場合には、過度のフィブリル化が起こり、フィブリルの脱落や、マルチフィラメント糸の強度低下が起こる。
【0024】
前述のポリオキシエチレン系ポリエーテルおよび有機金属スルホン酸塩を易フィブリル性ポリエステル糸に配合するには、芳香族系ポリエステルが繊維化される前の任意の段階で、任意の方法が採用できる。例えば、芳香族系ポリエステルの重縮合反応開始前、重縮合反応途中、あるいは重縮合反応終了時に、粉粒体またはグリコール等の溶媒に溶解または分散した状態で添加しても良い。また、ポリオキシエチレン系ポリエーテルおよび有機金属スルホン酸塩を規定量含有したマスターチップを予め作成し、乾燥工程あるいは溶融紡糸工程で、重縮合が終わった芳香族ポリエステルと固体混合あるいは溶融混合しても良い。
【0025】
上記の任意の方法で、ポリオキシエチレン系ポリエーテルおよび有機金属スルホン酸塩が混合された芳香族ポリエステルは、常法の溶融紡糸法でポリエステル糸とすることができる。例えば、270〜300℃の紡糸温度で紡糸口金より吐出し、冷却固化し、油剤を付与した後、800〜2500m/minの速度で紡糸引き取りし、ワインダーで巻き取り、ポリエステル未延伸糸となす。該ポリエステル未延伸を一端巻き取って、紡糸工程とは別途に延伸を行っても良く、一端巻き取ることなく、紡糸引き取り後連続して延伸を行っても良い。
【0026】
本発明の易フィブリル性ポリエステル糸の繊度は通常の衣料用ポリエステル糸の範囲であれば良い。すなわち、総繊度は、30〜200dtex、より好ましくは50〜150dtex、単糸繊度は1〜4dtex、より好ましくは2〜3dtex、の範囲であれば良い。繊維断面形状は特に規定する必要は無く、円形、多葉形あるいは中空断面など用途に応じて任意に設定しても良い。
【0027】
さらに、本発明者は、このようにして得られた易フィブリル性ポリエステル糸と、より高い沸水収縮率を有するポリエステル糸とを混繊することによって、より高度で、均一な繊維のフィブリル化が達成できることを見出した。すなわち、易フィブリル性ポリエステル糸より4〜40%高い沸水収縮率を有するポリエステル糸を高収縮糸として混繊すれば、易フィブリル性ポリエステル糸が糸条表面に浮き出す状態となり、より高度で、均一なフィブリル化が達成できる。両ポリエステル糸の沸水収縮率差が4%未満の場合は、易フィブリル性ポリエステル糸単独糸とフィブリル化の程度は変わらない。一方、易フィブリル性ポリエステル糸より沸水収縮率が40%を越えるような高収縮糸は、常法で安定して生産することが難しく、また、織編物の熱収縮設定が困難となる。なお、易フィブリル性ポリエステル糸と高収縮糸との混繊比率は20/80〜80/20の範囲が好ましい。
【0028】
本発明の易フィブリル性ポリエステル糸あるいはポリエステル混繊糸を使用した織編物は、常法のカレンダー加工機にかけられ、140〜200℃に加熱されたローラーで押圧された後、アルカリ処理によって押圧された織編物表面が主体的にフィブリル化される。
【0029】
【実施例】
以下、実施例により、本発明を更に具体的に説明する。なお、実施例における各項目は次の方法で測定した。
【0030】
(1)固有粘度
常法に従い、オルソクロロフェノールを溶媒として使用し35℃で測定した。
【0031】
(2)重量平均分子量
ゲル透過クロマトグラフィーSHODEX GPC−101(昭和電工(株)製)を用いて測定した。
【0032】
(3)フィブリル品位
実施例、比較例で得られたポリエステル糸あるいはポリエステル混繊糸に400回/mの撚りを掛け、経緯使いの平織り組織で製織し、80℃で精錬・リラックス処理、160℃・45秒でプレセット乾熱処理を行った。この織物を、常法のカレンダー加工機に通し、160℃に加熱されたローラーで押圧した後、10%のアルカリ減量処理を行い、押圧された織編物表面を主体的にフィブリル化した。ついで120℃・30分で染色を行い、自然乾燥した後、160℃・45秒でファイナルセットを行い、フィブリル品位評価用織物とした。5人の検査員により、フィブリル化した織物表面の目視検査を行い、以下の格付けを行った。
レベル1: 織物表面が均一な細かい毛羽状態となっており、経筋は認められない。
レベル5: 織物表面の毛羽状態が不均一で、長短の明瞭な経筋が一面に認められる。
レベル2〜4:織物表面の毛羽状態および経筋の発生状況が上記レベル1とレベル5の間に格付けされる。
【0033】
(4)沸水収縮率
JIS L1013 8.18.1 B法に従い測定した。処理温度100℃。
【0034】
(5)強度、伸度
JIS−L1013の方法に従い引張試験を行い、破断時の強度、伸度を測定した。
【0035】
[実施例1〜5、比較例1〜2]
テレフタル酸ジメチル100部、エチレングリコール60部、酢酸カルシウム1水塩0.06部(テレフタル酸ジメチルに対して0.066モル%)および整色剤として酢酸コバルト4水塩0.009部(テレフタル酸ジメチルに対して0.07モル%)をエステル交換缶に仕込み、常法でエステル交換反応させた。次いで安定剤としてリン酸トリメチル0.058部(テレフタル酸ジメチルに対して0.080モル%)、重合触媒として三酸化アンチモン0.04部(テレフタル酸ジメチルに対して0.027モル%)を添加し、同時に過剰のエチレングリコールを追い出しながら240℃まで昇温したあと、重合反応缶に移した。
【0036】
次にこの反応混合物に、下記式(I)で表され、式(I)中のj、j’、m、m’、p、MwA/MwBおよび重量平均分子量が各々表1に示す値を有するポリオキシエチレン系ポリエーテルを、ポリマー重量基準で1.4%となるように添加し、引き続いて反応缶内の圧力を1時間かけて760mmHgから3mmHgまで減圧し、10分後にドデシルベンゼンスルホン酸ナトリウムをポリマー重量基準で0.5%となるように添加した。さらに1mmHgまで減圧し、以下常法に従い重合を行い、ペレット状に裁断し、固有粘度0.63のポリエステルチップを得た。
【0037】
【化7】
Figure 0003973539
【0038】
【表1】
Figure 0003973539
【0039】
こうして得られたポリエステルチップを各々常法で乾燥し、スクリュウ押出機を装備した溶融紡糸装置に導入し、286℃で溶融し、20個の円形吐出孔を穿設した紡糸口金を通して吐出し、冷却固化し、油剤を付与した後、一対のゴデットローラーを介して1200m/minで紡糸引き取りし、ワインダーで巻き取りポリエステル未延伸糸を得た。該ポリエステル延伸糸を別途延伸装置に掛け、伸度が約30%となるように延伸倍率を設定し、90℃で延伸し、205℃で熱セットし、表1に示す繊維物性(強度、伸度、沸水収縮率)を有する50dtex/20フィラメントのポリエステル糸を得て、前述の(3)の方法で各々のポリエステル糸から織物のフィブリル品位を評価し、表1に示す結果を得た。
【0040】
表1から明らかなように、本発明の範囲内の構造式を有するポリオキシエチレン系ポリエーテルを本発明に既定する範囲の量含有するポリエステル糸からの織物表面には極めて良好なフィブリル品位が発現した(実施例1〜5)。本発明の範囲外の構造を有するポリオキシエチレン系ポリエーテルを含有したポリエステル糸からの織物表面は経筋が多く、レベル4〜5の格付けとなった(比較例1〜2)。
【0041】
[比較例3]
ドデシルベンゼンスルホン酸ナトリウムを添加しない以外は実施例1と同じ方法、条件でポリエステルチップを作成し、ポリエステル糸を作成し、フィブリル品位を評価した結果、フィブリル品位はレベル5であった。
【0042】
[実施例6]
実施例1で得られたポリエステル糸(沸水収縮率8.5%)と、イソフタール酸が10モル%共重された固有粘度0.64のポリエチレンテレフタレートポリマーからなり、沸水収縮率が35.2%のポリエステル高収縮糸(33dtex/12フィラメント)とをエアーノズルを通して交絡し、混繊糸となし、フィブリル品位を評価した。この混繊糸からの織物では、極めて良好なフィブリル品位が発現した(レベル1)。
【0043】
【発明の効果】
本発明によれば、織編物表面の繊維が均一にフィブリル化され織編物表面に優れた毛羽状外観を発現することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a polyester yarn that uniformly fibrillates on the surface of a woven or knitted fabric and a mixed yarn thereof.
[0002]
[Prior art]
Conventionally, as a method for imparting a fluffy appearance on the surface of the woven or knitted fabric, a fiber made of polyester added with an organic sulfonic acid metal salt or the like is used as a woven or knitted fabric, and the surface of the woven or knitted fabric is subjected to an alkali treatment to perform a buffing treatment, Alternatively, a method is disclosed in which polyester fibers are microfibrillated by buffing treatment and then subjected to alkali hydrolysis treatment to form fluff on the surface of the woven or knitted fabric (for example, see Patent Document 1). However, it is difficult to control the dispersion state of polyester fiber such as organic sulfonic acid metal salt in polyester fiber obtained by blending organic sulfonic acid metal salt that is incompatible with polyester. There was a problem that spots were generated in the degree of fibrillation between the fibers, streaky spots were generated on the surface of the woven or knitted fabric, and the quality of the fabric was deteriorated.
[0003]
Further, a fiber made of polyester in which a long-chain organic compound incompatible with the polyester polymer and / or a metal salt of an organic sulfonic acid is added is formed into a woven or knitted fabric, and the woven or knitted fabric is subjected to uneven treatment or embossing and alkali treatment. A method of partially fibrillating polyester fibers on the fabric surface in combination is disclosed (see, for example, Patent Document 2 and Patent Document 3). However, the entire surface of the woven or knitted fabric is made of a woven or knitted fabric made of polyester fibers in which the polyester polymer presented in the above method is incompatible with the long-chain organic or organic sulfonic acid metal salt. When pressurizing and fibrillating, there was a problem that streaky spots were generated on the surface of the woven or knitted fabric and the quality of the fabric deteriorated.
[0004]
[Patent Document 1]
JP 58-298457 A
[Patent Document 2]
Japanese Patent Laid-Open No. 7-197375 [0006]
[Patent Document 3]
Japanese Patent Laid-Open No. 11-361181 [0007]
[Problems to be solved by the invention]
The present invention has been made against the background of the above-described prior art. The purpose of the present invention is to provide an easily fibrillated polyester yarn that is uniformly fibrillated on the surface of the woven or knitted fabric and can exhibit an excellent fluffy appearance on the surface of the woven or knitted fabric. It is to provide.
[0008]
[Means for Solving the Problems]
As a result of intensive studies in view of the above-described conventional technology, the present inventors have completed the present invention. That is, an object of the present invention is “a filament yarn made of an aromatic polyester, and 0.5 to 2.0% of a polyoxyethylene polyether represented by the following formula (I) based on the fiber weight: This is achieved by an easily fibrillated polyester yarn characterized by containing 0.1 to 1.0% of an organometallic sulfonate represented by the following formula (II) based on the fiber weight.
[0009]
[Chemical 3]
Figure 0003973539
[0010]
[Formula 4]
Figure 0003973539
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
The aromatic polyester referred to in the present invention is an aromatic polyester having an aromatic ring as a main repeating unit of a polymer. Preferred examples of the aromatic polyester include polyethylene terephthalate, polypropylene terephthalate, and polybutylene terephthalate. Moreover, the polyester which copolymerized a small amount of components other than an acid component and / or a glycol component may be sufficient. Of these, polyethylene terephthalate, polypropylene terephthalate and copolymers thereof can be preferably used because they have mechanical properties suitable for woven and knitted fabrics.
[0012]
The aromatic polyester is a small amount of additives as necessary, for example, lubricants, pigments, dyes, antioxidants, solid phase polymerization accelerators, fluorescent whitening agents, as long as the effects of the present invention are not impaired. An antistatic agent, an antibacterial agent, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a light-shielding agent, a matting agent, and the like may be included.
[0013]
The easily fibrillated polyester yarn of the present invention comprises 0.5 to 2.0% of a polyoxyethylene-based polyether represented by the following formula (I) based on the fiber weight and an organic metal represented by the following formula (II) It is important that the sulfonate is contained in an amount of 0.1 to 1.0% based on the fiber weight.
[0014]
[Chemical formula 5]
Figure 0003973539
[0015]
[Chemical 6]
Figure 0003973539
[0016]
As is apparent from the above formula (I), the polyoxyethylene-based polyether has a chain having a branched portion represented by —C j H 2j + 1 and —C j ′ H 2j ′ + 1 (hereinafter, each It is a non-random copolymerized polyoxyethylene-based polyether composed of an A chain block and an A ′ chain block) and an unbranched straight chain (hereinafter referred to as a B chain block). At this time, said J and J 'are 13-28, Preferably it is the range of 14-20. When J and J ′ are less than 13, fibrillation of the fibers becomes non-uniform, and streaky spots are generated on the surface of the woven or knitted fabric. When J and J ′ exceed 28, sufficient fiber fibrillation does not occur.
[0017]
Further, the ratio of the molecular weight (MwB) of the B chain block to the total molecular weight (MwA) of the A chain block and the A ′ chain block (A and A ′) (hereinafter referred to as MwA / MwB) is 0.2 to 1 .2, preferably 0.25 to 1.0. When MwA / MwB is less than 0.2, the B chain block becomes too long, or the lengths of the branches of the A and A ′ chain blocks become too short, and fiber fibrillation does not occur. When MwA / MwB exceeds 1.2, the A and A ′ chain blocks become too long, or the length of the branch of the B chain block becomes too short, resulting in uneven fiber fibrillation and weaving. Streaky spots appear on the surface of the knitted fabric.
[0018]
It is presumed that the fiber fibrillation effect of such a polyoxyethylene-based polyether is expressed by the following mechanism. That is, the polyoxyethylene-based polyether is subjected to elongation of molecular units during the fiberization process of the polyester polymer, and the branched portions at both ends of the straight chain portion exhibit an anchoring effect on the polyester molecule. It is presumed that the straight-chain part of the polyether is thinned while being stretched along with the stretching of the polyester molecule. Polyester fibers refined with such a molecular structure, when subjected to fibrillation treatment such as alkali treatment, uniform fibrils are generated in the fiber axis direction along the stretched polyoxyethylene-based polyether molecules It is estimated to be.
[0019]
The polyoxyethylene-based polyether content should be 0.5 to 2.0%, preferably 1.0 to 2.0%, based on the fiber weight. When the content of the polyoxyethylene-based polyether is less than 0.5%, the fiber fibrillation does not proceed sufficiently. Further, when the polyoxyethylene-based polyether content exceeds 2.0%, excessive fibrillation occurs, resulting in fibril removal and multifilament yarn strength reduction.
[0020]
The weight average molecular weight of the polyoxyethylene-based polyether is suitably 5000 to 16000, more preferably 5500 to 14000.
[0021]
Next, the easily fibrillated polyester yarn of the present invention contains an organometallic sulfonate represented by the above formula (II) together with the above polyoxyethylene-based polyether. The organometallic sulfonate may be a single compound or a mixture of organosulfonic acid metal salts having various alkyl groups or alkylaryl groups.
[0022]
Specific examples include sodium stearylsulfonate, sodium dodecylbenzenesulfonate, tetrabutylphosphonium dodecylbenzenesulfonate, and mixtures thereof. Such organometallic sulfonates are presumed to play a role in promoting uniform fibrillation throughout the fiber in the molecular structure of the fiber in the fibrillation process, such as alkali treatment, as a starting point for fibrillation. The
[0023]
The organometallic sulfonate content should be 0.1-1.0%, preferably 0.2-0.7%, based on fiber weight. When the content of the organometallic sulfonate is less than 0.1%, the fibrillation of the fiber does not proceed sufficiently or uneven fibrils are generated. When the content exceeds 1.0%, excessive fibrillation occurs, causing fibrils to drop and multifilament yarn strength to decrease.
[0024]
In order to blend the polyoxyethylene-based polyether and the organometallic sulfonate into the easily fibrillated polyester yarn, any method can be adopted at any stage before the aromatic polyester is made into a fiber. For example, it may be added in a state dissolved or dispersed in a solvent such as a granular material or glycol before the start of the polycondensation reaction of the aromatic polyester, during the polycondensation reaction, or at the end of the polycondensation reaction. In addition, a master chip containing a predetermined amount of polyoxyethylene-based polyether and organometallic sulfonate is prepared in advance, and solid-mixed or melt-mixed with the aromatic polyester after polycondensation in the drying process or melt spinning process. Also good.
[0025]
The aromatic polyester mixed with the polyoxyethylene-based polyether and the organometallic sulfonate by any method described above can be made into a polyester yarn by a conventional melt spinning method. For example, it is discharged from a spinneret at a spinning temperature of 270 to 300 ° C., cooled and solidified, provided with an oil agent, then taken up at a speed of 800 to 2500 m / min, taken up with a winder, and made into a polyester undrawn yarn. The polyester unstretched may be wound on one end and stretched separately from the spinning step, or may be continuously stretched after the take-up without winding the other end.
[0026]
The fineness of the easily fibrillated polyester yarn of the present invention may be in the range of ordinary polyester yarn for clothing. That is, the total fineness may be 30 to 200 dtex, more preferably 50 to 150 dtex, and the single yarn fineness may be 1 to 4 dtex, more preferably 2 to 3 dtex. The fiber cross-sectional shape does not need to be specifically defined, and may be arbitrarily set according to the application such as a circular shape, a multi-leaf shape, or a hollow cross-section.
[0027]
Furthermore, the present inventor achieved a more advanced and uniform fiber fibrillation by mixing the easily fibrillated polyester yarn thus obtained with the polyester yarn having a higher boiling water shrinkage. I found out that I can do it. That is, if a polyester yarn having a boiling water shrinkage of 4 to 40% higher than that of the easily fibrillated polyester yarn is mixed as a highly shrinkable yarn, the easily fibrillated polyester yarn is raised on the surface of the yarn, and is more sophisticated and uniform. Fibrillation can be achieved. When the difference in boiling water shrinkage between the two polyester yarns is less than 4%, the degree of fibrillation does not change from that of the single fibrillated polyester yarn alone. On the other hand, a high shrinkage yarn having a boiling water shrinkage rate of more than 40% than an easily fibrillated polyester yarn is difficult to be stably produced by a conventional method, and it becomes difficult to set heat shrinkage of a woven or knitted fabric. In addition, the blend ratio of the easily fibrillated polyester yarn and the high shrinkage yarn is preferably in the range of 20/80 to 80/20.
[0028]
The woven or knitted fabric using the easily fibrillated polyester yarn or the polyester blended yarn of the present invention was subjected to a conventional calendering machine, pressed with a roller heated to 140 to 200 ° C., and then pressed with an alkali treatment. The surface of the woven or knitted fabric is mainly fibrillated.
[0029]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples. In addition, each item in an Example was measured with the following method.
[0030]
(1) The intrinsic viscosity was measured at 35 ° C. using orthochlorophenol as a solvent according to an ordinary method.
[0031]
(2) It measured using weight average molecular weight gel permeation chromatography SHODEX GPC-101 (Showa Denko Co., Ltd. product).
[0032]
(3) Twist 400 times / m to the polyester yarn or polyester blended yarn obtained in the fibril quality examples and comparative examples, weave it with a plain weave structure, and refining and relaxing at 80 ° C, 160 ° C -Preset dry heat treatment was performed in 45 seconds. This woven fabric was passed through a conventional calendering machine and pressed with a roller heated to 160 ° C., and then subjected to a 10% alkali weight loss treatment to mainly fibrillate the pressed woven or knitted fabric surface. Next, dyeing was performed at 120 ° C. for 30 minutes, and after natural drying, final setting was performed at 160 ° C. for 45 seconds to obtain a fibril quality evaluation woven fabric. A visual inspection of the fibrillated fabric surface was conducted by five inspectors, and the following ratings were given.
Level 1: The fabric surface is in a uniform fine fluff state, and no warps are observed.
Level 5: The surface of the fabric is not uniform, and long and short clear warps are found on one side.
Levels 2 to 4: The state of fluff on the fabric surface and the occurrence of warps are rated between level 1 and level 5 above.
[0033]
(4) Boiling water shrinkage rate Measured according to JIS L1013 8.18.1 B method. Processing temperature 100 ° C.
[0034]
(5) Strength and elongation A tensile test was performed according to the method of JIS-L1013, and the strength and elongation at break were measured.
[0035]
[Examples 1-5, Comparative Examples 1-2]
100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, 0.06 part of calcium acetate monohydrate (0.066 mol% with respect to dimethyl terephthalate) and 0.009 part of cobalt acetate tetrahydrate as a color adjuster (terephthalic acid) 0.07 mol% with respect to dimethyl) was charged into a transesterification can and subjected to a transesterification by a conventional method. Next, 0.058 parts of trimethyl phosphate (0.080 mol% with respect to dimethyl terephthalate) was added as a stabilizer, and 0.04 parts of antimony trioxide (0.027 mol% with respect to dimethyl terephthalate) was added as a polymerization catalyst. At the same time, the temperature was raised to 240 ° C. while expelling excess ethylene glycol, and then transferred to a polymerization reactor.
[0036]
Next, this reaction mixture is represented by the following formula (I), and j, j ′, m, m ′, p, MwA / MwB and weight average molecular weight in the formula (I) have the values shown in Table 1, respectively. Polyoxyethylene-based polyether was added so as to be 1.4% based on the weight of the polymer. Subsequently, the pressure in the reaction vessel was reduced from 760 mmHg to 3 mmHg over 1 hour, and after 10 minutes, sodium dodecylbenzenesulfonate Was added to 0.5% based on the polymer weight. The pressure was further reduced to 1 mmHg, polymerization was performed according to a conventional method, and the resultant was cut into pellets to obtain a polyester chip having an intrinsic viscosity of 0.63.
[0037]
[Chemical 7]
Figure 0003973539
[0038]
[Table 1]
Figure 0003973539
[0039]
Each of the polyester chips thus obtained is dried by a conventional method, introduced into a melt spinning apparatus equipped with a screw extruder, melted at 286 ° C., discharged through a spinneret having 20 circular discharge holes, and cooled. After solidifying and applying the oil agent, the yarn was taken up at 1200 m / min through a pair of godet rollers, and wound with a winder to obtain an unstretched polyester yarn. The polyester drawn yarn is separately applied to a drawing apparatus, the draw ratio is set so that the elongation is about 30%, drawn at 90 ° C., heat set at 205 ° C., and the fiber properties (strength, elongation shown in Table 1) are set. A polyester yarn of 50 dtex / 20 filaments having a degree of boiling water shrinkage) was obtained, and the fibril quality of the fabric was evaluated from each polyester yarn by the method (3) described above. The results shown in Table 1 were obtained.
[0040]
As is apparent from Table 1, a very good fibril quality is exhibited on the fabric surface from the polyester yarn containing the polyoxyethylene-based polyether having the structural formula within the scope of the present invention in the range defined in the present invention. (Examples 1 to 5). The fabric surface from the polyester yarn containing the polyoxyethylene-based polyether having a structure outside the scope of the present invention has many warps, and has a rating of level 4-5 (Comparative Examples 1-2).
[0041]
[Comparative Example 3]
A polyester chip was prepared by the same method and conditions as in Example 1 except that sodium dodecylbenzenesulfonate was not added, a polyester yarn was prepared, and the fibril quality was evaluated. As a result, the fibril quality was level 5.
[0042]
[Example 6]
The polyester yarn obtained in Example 1 (boiling water shrinkage: 8.5%) and a polyethylene terephthalate polymer having an intrinsic viscosity of 0.64 in which 10 mol% of isophthalic acid is co-polymerized, has a boiling water shrinkage of 35.2%. Polyester high shrink yarn (33 dtex / 12 filament) was entangled through an air nozzle to form a mixed yarn and evaluated for fibril quality. In the woven fabric from this blended yarn, a very good fibril quality was expressed (level 1).
[0043]
【The invention's effect】
According to the present invention, the fibers on the surface of the woven or knitted fabric are uniformly fibrillated, and an excellent fluffy appearance can be expressed on the surface of the woven or knitted fabric.

Claims (2)

芳香族系ポリエステルからなるフィラメント糸であって、下記式(I)で表されるポリオキシエチレン系ポリエーテルを繊維重量基準で0.5〜2.0%および下記式(II)で表される有機金属スルホン酸塩を繊維重量基準で0.1〜1.0%含有することを特徴とする易フィブリル性ポリエステル糸。
Figure 0003973539
Figure 0003973539
A filament yarn made of an aromatic polyester, represented by 0.5 to 2.0% of a polyoxyethylene-based polyether represented by the following formula (I) and the following formula (II) based on the fiber weight: An easily fibrillated polyester yarn comprising 0.1 to 1.0% of an organic metal sulfonate based on fiber weight.
Figure 0003973539
Figure 0003973539
請求項1の易フィブリル性ポリエステル糸と、該易フィブリル性ポリエステル糸より4〜40%高い沸水収縮率を有するポリエステル糸とを混繊させたポリエステル混繊糸。A polyester blended yarn obtained by blending the easily fibrillated polyester yarn of claim 1 and a polyester yarn having a boiling water shrinkage 4 to 40% higher than that of the easily fibrillated polyester yarn.
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