JP2003171860A - Fiber for air laid nonwoven fabric - Google Patents

Fiber for air laid nonwoven fabric

Info

Publication number
JP2003171860A
JP2003171860A JP2001368319A JP2001368319A JP2003171860A JP 2003171860 A JP2003171860 A JP 2003171860A JP 2001368319 A JP2001368319 A JP 2001368319A JP 2001368319 A JP2001368319 A JP 2001368319A JP 2003171860 A JP2003171860 A JP 2003171860A
Authority
JP
Japan
Prior art keywords
fiber
melting point
air
crimp
synthetic polymer
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
JP2001368319A
Other languages
Japanese (ja)
Inventor
Hironori Aida
裕憲 合田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
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 Teijin Ltd filed Critical Teijin Ltd
Priority to JP2001368319A priority Critical patent/JP2003171860A/en
Priority to PCT/JP2002/012244 priority patent/WO2003046266A1/en
Priority to CN 200710307425 priority patent/CN101200814B/en
Priority to DE60234210T priority patent/DE60234210D1/en
Priority to AU2002343830A priority patent/AU2002343830A1/en
Priority to CNB028042999A priority patent/CN100419144C/en
Priority to EP02780134A priority patent/EP1452633B1/en
Priority to AT02780134T priority patent/ATE447058T1/en
Priority to KR1020037010018A priority patent/KR100954704B1/en
Priority to US10/470,342 priority patent/US20040234757A1/en
Priority to MXPA03006494A priority patent/MXPA03006494A/en
Priority to DK02780134T priority patent/DK1452633T3/en
Priority to TW091134819A priority patent/TWI248994B/en
Publication of JP2003171860A publication Critical patent/JP2003171860A/en
Priority to HK04105553.4A priority patent/HK1062699A1/en
Priority to HK04107811.8A priority patent/HK1065077A1/en
Priority to US11/404,826 priority patent/US20060182964A1/en
Pending legal-status Critical Current

Links

Landscapes

  • Artificial Filaments (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber for air laid nonwoven fabrics in which uniform opening property in an air laid nonwoven fabric producing step is compatible with a sufficient development of three-dimensional crimping. <P>SOLUTION: This fiber for the air laid nonwoven fabrics is composed of a single synthetic polymer or a conjugate fiber conjugated in eccentric core- sheath type or parallel type. The fiber has zigzag planer crimp with 0.5-200 decitex denier of single fiber, 3-20 mm fiber length, 0-13/25 mm number of crimps and 0-20% crimp ratio, and the fiber has a latent crimp performance developing three-dimensional crimp with 15-80/25 mm number of crimps and 25-90% crimp ratio by heat treatment at 60-200°C. <P>COPYRIGHT: (C)2003,JPO

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、エアレイド法不織
布用繊維に関し、更に詳しくは、嵩高かつ地合いの均一
性に優れたエアレイド法不織布の製造に適した繊維に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber for an air-laid non-woven fabric, and more particularly to a fiber suitable for producing an air-laid non-woven fabric which is bulky and excellent in uniformity of texture.

【０００２】[0002]

【従来の技術】エアレイド法により製造される不織布
は、従来より広く用いられているカード法で製造される
不織布に比べ、繊維の配向が進行方向と幅方向の差がな
く均一であり、また、抄造法による不織布に比べ嵩高性
を発現し易い特徴があり、近年特に生産量を伸ばしてい
る分野である。一般に、エアレイド法不織布用繊維は、
特開平１１−８１１１６号公報に示される如く、嵩高性
を付与するために平面ジグザグ状やスパイラル状の顕在
捲縮を付与している。しかし、嵩高性をよくするために
捲縮数または捲縮率を大きくすると、空気開繊工程で繊
維の開繊性が低下し、未開繊束やウェブ斑の発生が多く
なり、得られた不織布は外観品位が劣り、不織布強力の
低い劣悪なものとなることが多い。特に、スパイラル状
の顕在捲縮が付与された潜在捲縮性能を有した繊維に、
長繊維トウまたはトウカット束の状態で熱処理すると、
捲縮発現した繊維同士が数本〜数十本の束となって入り
組んだ形となり、多くの未開繊束となり、得られた不織
布は外観品位が著しく劣ったものとなる。このように、
嵩高性に富み優れた外観品位の不織布を製造するに適し
たエアレイド不織布用繊維は従来提供されていなかっ
た。2. Description of the Related Art Nonwoven fabrics produced by the air laid method have a uniform fiber orientation as compared with non-woven fabrics produced by the card method, which has been widely used in the past, with no difference between the traveling direction and the width direction. It is a field that is more prominent in expressing bulkiness than non-woven fabrics produced by the papermaking method, and this is a field in which the production amount has been particularly increasing in recent years. In general, fibers for air-laid non-woven fabric are
As disclosed in Japanese Patent Application Laid-Open No. 11-81116, in order to impart bulkiness, a planar zigzag-shaped or spiral-shaped actual crimp is applied. However, if the number of crimps or the crimping ratio is increased to improve the bulkiness, the openability of the fibers is lowered in the air opening step, and unopened bundles and web spots are often generated. The appearance quality is poor, and the strength of the nonwoven fabric is often low and poor. In particular, for fibers having latent crimp performance to which spiral-shaped actual crimps are applied,
When heat-treated in the state of long fiber tow or tow cut bundle,
The crimp-developed fibers are intricately formed as a bundle of several to several tens, and many unopened bundles are obtained, and the resulting nonwoven fabric is remarkably inferior in appearance quality. in this way,
Fibers for air-laid non-woven fabrics suitable for producing non-woven fabrics having high bulkiness and excellent appearance quality have not been provided so far.

【０００３】[0003]

【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、エアレイド不
織布製造工程において、均一に開繊し、かつ充分な３次
元捲縮を発現することによって、得られた不織布に良好
な地合いと優れた嵩高性をもたらす繊維を提供すること
にある。SUMMARY OF THE INVENTION The present invention has been made against the background of the above-mentioned prior art, and the purpose thereof is to uniformly open and to develop a sufficient three-dimensional crimp in the manufacturing process of air-laid nonwoven fabric. The purpose of the present invention is to provide a fiber that brings good texture and excellent bulkiness to the obtained nonwoven fabric.

【０００４】[0004]

【課題を解決するための手段】本発明者等は、上記課題
を解決するために鋭意検討を重ねた結果、合成重合体よ
りなり、単繊維繊度、繊維長および平面的に顕在する捲
縮を適切な範囲となし、熱処理によって適切な範囲の捲
縮を発現する潜在捲縮性能を付与した合成重合体繊維に
よって、嵩高性に富みかつ優れた外観品位のエアレイド
法不織布が得られることを突き止め、本発明に至った。
すなわち、本発明は以下の構成よりなるエアレイド法不
織布用繊維である。 （１）合成重合体よりなる繊維であって、単繊維繊度が
０．５〜２００デシテックス、繊維長が３〜２０ｍｍ、
単繊維の平面捲縮が捲縮数で１３山／２５ｍｍ以下およ
び捲縮率で２０％以下であって、６０〜２００℃の熱処
理によって捲縮数１５〜８０山／２５ｍｍおよび捲縮率
２５〜９０％の３次元捲縮を発現する特性を有すること
を特徴とするエアレイド不織布用繊維。 （２）熱収縮応力ピーク温度を６０〜１８０℃の範囲に
有する、（１）記載のエアレイド不織布用繊維。 （３）アルキレンテレフタレートを主たる成分とする単
一のポリエステルからなることを特徴とする（１）また
は（２）に記載のエアレイド不織布用繊維。 （４）２種の合成重合体が偏芯芯鞘型あるいは並列型に
複合された複合繊維である、（１）または（２）に記載
のエアレイド不織布用繊維。 （５）２種の合成重合体の双方が、融点２００℃以上の
アルキレンテレフタレートを主たる成分とするポリエス
テルである、（４）記載のエアレイド不織布用繊維。 （６）融点差が２０℃以上である低融点合成重合体と高
融点合成重合体からなり、低融点合成重合体が繊維表面
の少なくとも一部を長さ方向に連続して形成された熱接
着性複合繊維である、（４）記載のエアレイド不織布用
繊維。 （７）低融点合成重合体としてポリオレフィンを用い、
高融点合成重合体としてアルキレンテレフタレートを主
たる成分とするポリエステルを用いた複合繊維である、
（６）記載のエアレイド不織布用繊維。 （８）低融点合成重合体として５０〜２００℃の融点あ
るいは軟化点をもつイソフタル酸共重合ポリアルキレン
テレフタレートを用い、高融点合成重合体としてポリア
ルキレンテレフタレートを用いた複合繊維である、
（６）記載のエアレイド不織布用繊維。 （９）低融点合成重合体として８０〜２００℃の融点を
もつ熱可塑性エラストマーを用いた複合繊維である、
（６）記載のエアレイド不織布用繊維。 （１０）低融点合成重合体として８０〜２００℃の融点
をもつ不飽和カルボン酸および不飽和カルボン酸無水物
から選ばれた少なくとも一種を含む不飽和化合物がグラ
フト重合された変成ポリオレフィンを用いた複合繊維で
ある、（６）記載のエアレイド不織布用繊維。Means for Solving the Problems The inventors of the present invention have conducted extensive studies in order to solve the above-mentioned problems, and as a result, have found that a single-fiber fineness, a fiber length and a planar crimp are formed from a synthetic polymer. With a proper range, it was found that a synthetic polymer fiber imparted with latent crimping ability to express crimps in a proper range by heat treatment gives an air-laid non-woven fabric rich in bulkiness and excellent in appearance quality. The present invention has been completed.
That is, the present invention is a fiber for an air-laid non-woven fabric having the following constitution. (1) A fiber made of a synthetic polymer, having a single fiber fineness of 0.5 to 200 decitex, a fiber length of 3 to 20 mm,
The planar crimp of the single fiber has a number of crimps of 13 ridges / 25 mm or less and a crimp rate of 20% or less, and a heat treatment at 60 to 200 ° C. has a number of crimps of 15 to 80 ridges / 25 mm and a crimp rate of 25 to A fiber for air-laid non-woven fabric, which has a property of developing 90% of three-dimensional crimps. (2) The fiber for air-laid nonwoven fabric according to (1), which has a heat shrinkage stress peak temperature in the range of 60 to 180 ° C. (3) The fiber for air-laid nonwoven fabric according to (1) or (2), which is composed of a single polyester containing alkylene terephthalate as a main component. (4) The fiber for air-laid nonwoven fabric according to (1) or (2), which is a composite fiber in which two kinds of synthetic polymers are combined in an eccentric core-sheath type or a parallel type. (5) The fiber for air-laid nonwoven fabric according to (4), wherein both of the two kinds of synthetic polymers are polyesters having an alkylene terephthalate having a melting point of 200 ° C. or more as a main component. (6) Thermal bonding comprising a low melting point synthetic polymer having a melting point difference of 20 ° C. or more and a high melting point synthetic polymer, and the low melting point synthetic polymer is formed by continuously forming at least a part of the fiber surface in the length direction. The fiber for air-laid nonwoven fabric according to (4), which is a functional conjugate fiber. (7) Polyolefin is used as the low melting point synthetic polymer,
A composite fiber using a polyester having alkylene terephthalate as a main component as a high melting point synthetic polymer,
(6) The fiber for air-laid nonwoven fabric according to item (6). (8) A composite fiber in which isophthalic acid copolymerized polyalkylene terephthalate having a melting point or a softening point of 50 to 200 ° C. is used as the low melting point synthetic polymer and polyalkylene terephthalate is used as the high melting point synthetic polymer.
(6) The fiber for air-laid nonwoven fabric according to item (6). (9) A composite fiber using a thermoplastic elastomer having a melting point of 80 to 200 ° C. as a low melting point synthetic polymer,
(6) The fiber for air-laid nonwoven fabric according to item (6). (10) Composite using a modified polyolefin obtained by graft-polymerizing an unsaturated compound containing at least one selected from unsaturated carboxylic acids having a melting point of 80 to 200 ° C. and unsaturated carboxylic acid anhydrides as a low-melting point synthetic polymer The fiber for air-laid nonwoven fabric according to (6), which is a fiber.

【０００５】[0005]

【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。本発明の繊維は、合成重合体よりなる繊
維であって、単繊維繊度が０．５〜２００デシテック
ス、好ましくは１〜１００デシテックス、繊維長が３〜
２０ｍｍ、好ましくは５〜１５ｍｍ、単繊維の平面捲縮
が捲縮数で１３山／２５ｍｍ以下および捲縮率で２０％
以下、好ましくは捲縮数で１０山／２５ｍｍ以下および
捲縮率で１３％以下であって、６０〜２００℃の熱処理
によって捲縮数１５〜８０山／２５ｍｍおよび捲縮率２
５〜９０％、好ましくは捲縮数２０〜７０山／２５ｍｍ
および捲縮率３０〜８０％、の３次元捲縮を発現する特
性を有する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. The fiber of the present invention is a fiber made of a synthetic polymer and has a single fiber fineness of 0.5 to 200 decitex, preferably 1 to 100 decitex, and a fiber length of 3 to.
20 mm, preferably 5 to 15 mm, planar crimp of single fiber is 13 peaks / 25 mm or less in crimp number and 20% in crimp rate
Hereafter, the number of crimps is preferably 10 ridges / 25 mm or less and the crimp ratio is 13% or less, and the number of crimps is 15-80 ridges / 25 mm and the crimp ratio 2 by heat treatment at 60 to 200 ° C.
5 to 90%, preferably 20 to 70 threads / 25 mm
And has a characteristic of developing a three-dimensional crimp with a crimp ratio of 30 to 80%.

【０００６】繊維の単繊維繊度が０．５デシテックス未
満となると熱処理後に発現する３次元捲縮のスパイラル
径が小さくなるために、得られた不織布の嵩高性が不足
する。また、２００デシテックスより大きくなると、ア
スペクト比（繊維長／単繊維繊度の比）が小さくなり、
却って繊維間密度が大きくなるために、熱処理による３
次元捲縮が発現しにくく、得られた不織布の嵩高性が不
十分となる。When the single fiber fineness of the fiber is less than 0.5 decitex, the spiral diameter of the three-dimensional crimp developed after the heat treatment becomes small, so that the bulkiness of the obtained nonwoven fabric is insufficient. If it is larger than 200 decitex, the aspect ratio (ratio of fiber length / single fiber fineness) becomes smaller,
On the contrary, the fiber-to-fiber density becomes large, so
Dimensional crimping is unlikely to occur, and the bulkiness of the resulting nonwoven fabric becomes insufficient.

【０００７】繊維長が３ｍｍ未満の場合、得られた不織
布の強力が小さくなる。また、熱処理後の３次元捲縮に
よる嵩高効果が不十分となる。繊維長が２０ｍｍを超え
ると、繊維間の絡みが大きく、エアレイド空気開繊工程
における繊維の空気開繊が不良となり、得られた不織布
の地合は極めて不均一となる。When the fiber length is less than 3 mm, the strength of the obtained nonwoven fabric becomes small. In addition, the bulkiness effect due to the three-dimensional crimping after the heat treatment becomes insufficient. If the fiber length exceeds 20 mm, the entanglement between the fibers is large, the air opening of the fibers in the air-laid air opening step becomes poor, and the texture of the obtained nonwoven fabric becomes extremely uneven.

【０００８】通常、繊維に施された捲縮は、熱処理によ
って発現する３次元捲縮と相まって好ましい嵩高繊維構
造をもたらす。しかしながら、本発明者は、熱処理前の
繊維の捲縮形態が平面捲縮で無く３次元捲縮形態となっ
ている場合、捲縮数が１３山／２５ｍｍを超える場合、
あるいは捲縮率が２０％を超える場合は、繊維間の絡み
が大きくなり過ぎて、エアレイド空気開繊工程において
繊維の空気開繊が不良となり、均一なウェブを作成する
ことができないという現象を突き止めた。したがって、
本発明では、熱処理前の繊維の顕在捲縮形態を、捲縮数
が１３山／２５ｍｍ以下および捲縮率が２０％以下の平
面捲縮とすることによって、良好な空気開繊性と好まし
い嵩高性とを実現した。ここで平面捲縮とは捲縮の山の
先端が鋭利な角度で屈曲しているジグザグ型捲縮や、湾
曲した曲線であるΩ型捲縮を含む、２次元捲縮をいう。Usually, the crimps applied to the fibers, together with the three-dimensional crimps developed by the heat treatment, bring about a preferable bulky fiber structure. However, the present inventors have found that when the crimped form of the fiber before heat treatment is not a planar crimp but a three-dimensional crimped form, and the number of crimps exceeds 13 peaks / 25 mm,
Or, if the crimp ratio exceeds 20%, the phenomenon that the entanglement between the fibers becomes too large and the air opening of the fibers becomes poor in the air-laid air opening step, and a uniform web cannot be created, was found. It was Therefore,
In the present invention, the actual crimp form of the fiber before heat treatment is a flat crimp having a crimp number of 13 peaks / 25 mm or less and a crimp ratio of 20% or less, whereby good air opening property and preferable bulkiness are obtained. Realized. Here, the planar crimp refers to a two-dimensional crimp including a zigzag crimp in which the tip of the crest of the crimp is bent at a sharp angle and a Ω crimp that is a curved curve.

【０００９】本発明の繊維は、熱処理によってスパイラ
ル３次元捲縮を発現する潜在捲縮性能を有していなけれ
ばならないが、６０℃未満で発現するような潜在捲縮性
能では、エアレイド法ウェブ形成の最中に擦過熱によっ
て３次元捲縮が発現してしまい、開繊性や空気分散性が
劣化するといった問題が発生する。また、２００℃超で
しか発現しないような潜在捲縮性能は、エアレイド工程
での熱処理で３次元捲縮を充分発現することができず、
得られた不織布に十分な嵩高性が発現しない。The fiber of the present invention must have a latent crimping property which develops a spiral three-dimensional crimp by heat treatment, but in the latent crimping property which develops at less than 60 ° C., the air-laid method web formation is carried out. During the process, a three-dimensional crimp is developed due to heat of rubbing, which causes a problem that the openability and the air dispersibility are deteriorated. In addition, the latent crimping performance which is exhibited only above 200 ° C. cannot sufficiently develop a three-dimensional crimp by the heat treatment in the air-laid step,
The obtained nonwoven fabric does not exhibit sufficient bulkiness.

【００１０】また、６０〜２００℃の熱処理後の捲縮数
が１５個／２５ｍｍ未満あるいは捲縮率が２５％未満の
ような潜在捲縮性能であると得られた不織布に十分な嵩
高性が発現しない。６０〜２００℃の熱処理後の捲縮数
が８０個／２５ｍｍ超あるいは捲縮率が９０％超のよう
な潜在捲縮性能であると、繊維間空隙が少なく密に充填
した繊維集合体となり、得られた不織布に十分な嵩高性
が発現しない。Further, when the latent crimping performance is such that the number of crimps after heat treatment at 60 to 200 ° C. is less than 15 pieces / 25 mm or the crimping rate is less than 25%, the obtained nonwoven fabric has sufficient bulkiness. Does not develop. When the latent crimp performance is such that the number of crimps after heat treatment at 60 to 200 ° C. exceeds 80/25 mm or the crimp ratio exceeds 90%, a densely packed fiber assembly having few inter-fiber voids, The obtained nonwoven fabric does not exhibit sufficient bulkiness.

【００１１】また本発明者は、エアレイド熱処理工程に
おける本発明の繊維の熱収縮挙動を詳細に観察し解析し
た結果、該繊維の熱収縮応力ピーク温度が６０〜１８０
℃の範囲にある場合、より好ましい熱処理効果が発現す
ることを突き止めた。ここでいう熱収縮応力とは、一般
的に使用されている収縮応力測定器を使用し、５ｃｍの
輪状糸を作り、測定把持部に糸条を把持させ、昇温速度
１２０秒／３００℃、初荷重０．０９ｃＮ／ｄｔｅｘで
測定した収縮応力である。収縮応力が極大となる温度を
熱収縮応力ピーク温度と定義した。熱収縮応力ピーク温
度が６０℃未満であると、エアレイド工程での擦過など
でウェブの熱処理前に３次元捲縮が発現し、繊維の分散
性が悪くなる傾向が認められる。また熱収縮応力ピーク
温度が１８０℃を超えると熱処理時の潜在捲縮発現性が
不十分となる傾向が認められる。なお、該繊維の熱収縮
応力ピーク温度を７０〜１６０℃の範囲に設定するとよ
り好ましい熱処理効果が発現する。The present inventor has also observed and analyzed the heat shrinkage behavior of the fiber of the present invention in the air-laid heat treatment step in detail, and as a result, the heat shrinkage stress peak temperature of the fiber is 60 to 180.
It was found that a more preferable heat treatment effect is exhibited when the temperature is in the range of ° C. The term "heat shrinkage stress" as used herein means that a commonly used shrinkage stress measuring instrument is used to form a 5 cm ring-shaped thread, and the measuring gripping section grips the thread, and the temperature rising rate is 120 seconds / 300 ° C. It is the contraction stress measured with an initial load of 0.09 cN / dtex. The temperature at which the shrinkage stress reaches a maximum is defined as the heat shrinkage stress peak temperature. When the heat shrinkage stress peak temperature is less than 60 ° C., three-dimensional crimp is developed before the heat treatment of the web due to rubbing in the air laid process, and the dispersibility of the fibers tends to deteriorate. Further, when the heat shrinkage stress peak temperature exceeds 180 ° C., latent crimp developability during heat treatment tends to be insufficient. In addition, when the heat shrinkage stress peak temperature of the fiber is set in the range of 70 to 160 ° C., a more preferable heat treatment effect is exhibited.

【００１２】本発明の繊維は合成重合体からなり、単独
でエアレイド不織布を製造しても良く、あるいはパルプ
やコットン等の天然繊維、レーヨン等の再生繊維、アセ
テート等の半合成繊維や異なる捲縮性能や収縮物性を有
する合成重合体繊維と混合しエアレイド不織布用繊維を
製造しても良い。The fiber of the present invention is made of a synthetic polymer and may be used alone to produce an air-laid nonwoven fabric, or natural fibers such as pulp and cotton, regenerated fibers such as rayon, semi-synthetic fibers such as acetate and different crimps. A fiber for an air-laid nonwoven fabric may be produced by mixing with a synthetic polymer fiber having performance and shrinkage properties.

【００１３】更に、本発明の繊維は、単一成分繊維ある
いは複合繊維としての２つの実施形態がある。更に各々
の実施形態はバインダーとしての性能をもたないエアレ
イド不織布主体繊維として使用される場合とバインダー
性能をもつ熱接着性繊維として使用される場合とがあ
り、その使用方法に従い合成重合体の構成を適切に設定
する必要がある。Further, the fiber of the present invention has two embodiments as a single component fiber or a composite fiber. Furthermore, each of the embodiments may be used as a main fiber of air-laid non-woven fabric that does not have a performance as a binder or as a heat-adhesive fiber having a performance of a binder. Need to be set appropriately.

【００１４】先ず、実施形態が単一成分繊維の場合、繊
維を構成する合成重合体としては、アルキレンテレフタ
レートを主たる成分とするポリエステルが好ましい。ア
ルキレンテレフタレートを主たる成分とするポリエステ
ルとは、構成モノマーの８０モル％以上がアルキレンテ
レフタレートで占められるポリエステルであり、ポリエ
チレンテレフタレート、ポリトリメチレンテレフタレー
ト、ポリブチレンテレフタレート等のポリアルキレンテ
レフタレートを意味する。必要に応じて、他のジカルボ
ン酸成分、オキシカルボン酸成分、他のジオール成分の
１種または２種以上を共重合単位として有するものを含
んでも良い。First, when the embodiment is a single-component fiber, the synthetic polymer forming the fiber is preferably a polyester containing alkylene terephthalate as a main component. The polyester having alkylene terephthalate as a main component is a polyester in which 80 mol% or more of the constituent monomers is occupied by alkylene terephthalate, and means polyalkylene terephthalate such as polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate. If necessary, those containing one or more other dicarboxylic acid components, oxycarboxylic acid components, and other diol components as copolymerized units may be included.

【００１５】その場合、他のジカルボン酸成分として
は、ジフェニルジカルボン酸、ナフタレンジカルボン酸
などの芳香族ジカルボン酸またはそれらのエステル形成
性誘導体、５−ナトリウムスルホイソフタル酸ジメチ
ル、５−ナトリウムスルホイソフタル酸ビス（２−ヒド
ロキシエチル）などの金属スルホネート基含有芳香族カ
ルボン酸誘導体、シュウ酸、アジピン酸、セバシン酸、
ドデカン２酸などの脂肪族ジカルボン酸またはそのエス
テル形成性誘導体を挙げることができる。また、オキシ
カルボン酸成分の例としては、ｐ−オキシ安息香酸、ｐ
−β−オキシエトキシ安息香酸またはそれらのエステル
形成性誘導体などを挙げることができる。In this case, other dicarboxylic acid components include aromatic dicarboxylic acids such as diphenyldicarboxylic acid and naphthalenedicarboxylic acid, or their ester-forming derivatives, dimethyl 5-sodium sulfoisophthalate, and bis 5-sodium sulfoisophthalic acid. Aromatic carboxylic acid derivative containing metal sulfonate group such as (2-hydroxyethyl), oxalic acid, adipic acid, sebacic acid,
Aliphatic dicarboxylic acids such as dodecane diacid or ester-forming derivatives thereof may be mentioned. Further, examples of the oxycarboxylic acid component include p-oxybenzoic acid and p
Examples include -β-oxyethoxybenzoic acid and their ester-forming derivatives.

【００１６】ジオール成分としてはエチレングリコー
ル、ジエチレングリコール、１，３−プロパンジオー
ル、１，４−ブタンジオール、１，６−ヘキサンジオー
ル、ネオペンチルグリコールなどの脂肪族ジオール、
１，４−ビス（β−オキシエトキシ）ベンゼン、ポリエ
チレングリコール、ポリトリメチレングリコール、ポリ
ブチレングリコールなどのポリアルキレングリコールな
どを挙げることができる。Aliphatic diols such as ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol and neopentyl glycol are used as the diol component.
Examples thereof include polyalkylene glycols such as 1,4-bis (β-oxyethoxy) benzene, polyethylene glycol, polytrimethylene glycol and polybutylene glycol.

【００１７】この中から、使用される目的に応じて適切
なアルキレンテレフタレートを選択し、本発明の要件を
満たす単糸繊度、繊維長、顕在捲縮形態および潜在捲縮
性能を有する繊維となす。このようなアルキレンテレフ
タレートを主たる成分とするポリエステル単独からな
る、本発明のエアレイド不織布用繊維は以下の方法で製
造することができる。From among these, an appropriate alkylene terephthalate is selected according to the purpose of use, and a fiber having a single yarn fineness, a fiber length, a manifest crimped form and a latent crimping performance which satisfy the requirements of the present invention is formed. The fiber for air-laid non-woven fabric of the present invention, which is composed of the polyester having alkylene terephthalate as the main component alone, can be produced by the following method.

【００１８】すなわち、ペレット化したポリエステルを
常法で乾燥後、スクリュー押出機等を装備した紡糸設備
で溶融紡糸し、吐出後のポリマー糸条流に非対称冷却を
施すことによって断面方向の配向異方性を付与し、その
後緊張状態あるいは弛緩状態いずれにしろ熱履歴を与え
ず集束する。より具体的には、紡糸口金下１〜５０ｍｍ
の位置で、１０〜４０℃の気体を、紡糸口金から吐出さ
れたポリマー糸条流に対し、該糸条流の進行方向に垂直
な面に対し＋２０〜−２０度の角度の範囲内で一方向か
ら吹き当てた後、紡糸速度５００〜３０００ｍ／分で捲
き取り、エアレイドウェブ成型上必要な油剤を付与した
後、繊維長３〜２０ｍｍにカットする。That is, after pelletized polyester is dried by a conventional method, it is melt-spun in a spinning equipment equipped with a screw extruder and the like, and the polymer yarn flow after discharge is subjected to asymmetric cooling to achieve anisotropic orientation in the cross-sectional direction. It imparts a property, and then converges without giving a heat history regardless of whether it is in a tension state or a relaxation state. More specifically, 1 to 50 mm below the spinneret
At a position of 10 to 40 ° C., a gas of 10 to 40 ° C. is supplied to the polymer yarn flow discharged from the spinneret within an angle range of +20 to −20 degrees with respect to a plane perpendicular to the traveling direction of the yarn flow. After spraying from the direction, it is wound up at a spinning speed of 500 to 3000 m / min, an oil agent necessary for air-laid web molding is applied, and then cut to a fiber length of 3 to 20 mm.

【００１９】なお、捲き取りと油剤付与の間に、１０〜
８０℃の温度下でネック延伸を施してもよい。ただし、
延伸温度が８０℃を超えたり、緊張状態や弛緩状態で８
０℃超の高温で熱処理することは、配向異方性を損な
い、所定の３次元捲縮が発現しなくなるので注意が必要
であるが、捲縮数や捲縮率を調整するために短時間で熱
処理してもよい。During the winding and application of the oil agent, 10 to 10
Neck stretching may be performed at a temperature of 80 ° C. However,
8 when the stretching temperature exceeds 80 ° C or the tension or relaxation state
It should be noted that heat treatment at a temperature higher than 0 ° C will impair the orientation anisotropy and the predetermined three-dimensional crimps will not appear, but it should be noted that it takes a short time to adjust the number of crimps and the crimp ratio. You may heat-process with.

【００２０】また、ネック延伸倍率設定は、未延伸糸の
冷延伸倍率の０．９倍以下にとどめておくことが３次元
捲縮発現性の面で好ましい。ここで、未延伸糸の冷延伸
倍率とは、紡糸直後から５分以内に採取した未延伸糸
を、２５℃、相対湿度６５％の空気中で、手でチャック
長１０ｃｍとして５ｃｍ／秒の速度で延伸して、これ以
上伸びなくなる時点のチャック長間隔（ｃｍ）を初期チ
ャック長（１０ｃｍ）で除した値として得られる。The setting of the neck draw ratio is preferably 0.9 times or less of the cold draw ratio of the undrawn yarn in terms of the three-dimensional crimp expression. Here, the cold draw ratio of the unstretched yarn means that the unstretched yarn collected within 5 minutes immediately after the spinning is manually moved in the air at 25 ° C. and 65% relative humidity at a chuck length of 10 cm and a speed of 5 cm / sec. It is obtained as a value obtained by dividing the chuck length interval (cm) at the time when the film is stretched at, and is no longer stretched by the initial chuck length (10 cm).

【００２１】なお、繊維に十分な断面異方性を持たせる
ための冷却気流の速度は０．４ｍ／秒、好ましくは０．
８ｍ／秒以上とすればよい。また、断面形状は、中実で
も中空でもよく、３角形や星型などの異型断面や異型中
空となってもよいが、より異方性を発現させるためには
中空繊維とすることが好ましい。これらの中空繊維や異
型繊維は公知の紡糸口金を用いて溶融紡糸することによ
って得ることができる。The velocity of the cooling air flow for imparting sufficient cross-sectional anisotropy to the fibers is 0.4 m / sec, preferably 0.
It may be 8 m / sec or more. The cross-sectional shape may be solid or hollow, and may be an irregular cross-section such as a triangle or a star, or an atypical hollow, but hollow fibers are preferable for more anisotropy. These hollow fibers and atypical fibers can be obtained by melt spinning using a known spinneret.

【００２２】次に、２種の合成重合体を偏芯芯鞘型ある
いは並列型に複合した複合繊維の場合、繊維を構成する
合成重合体としては、先に示したアルキレンテレフタレ
ートを主たる成分とするポリエステルの他、ポリプロピ
レン、高密度ポリエチレン、中密度ポリエチレン、低密
度ポリエチレン、線状低密度ポリエチレン、プロピレン
とαオレフィン（含エチレン）との結晶性ポリプロピレ
ン系共重合体、およびこれらの不飽和カルボン酸や不飽
和カルボン酸の無水物あるいはこれらのエステルや金属
塩鹸化物の共重合物等のポリオレフィン類、ポリアミド
類、フッ素樹脂、およびこれらの合成重合体の混合物等
が挙げられる。これらの中から、使用される目的に応じ
て適切な２種の合成重合体の組み合わせを選択する。Next, in the case of a composite fiber in which two kinds of synthetic polymers are compounded in an eccentric core-sheath type or a parallel type, the above-mentioned alkylene terephthalate is the main component as the synthetic polymer constituting the fiber. In addition to polyester, polypropylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, crystalline polypropylene-based copolymer of propylene and α-olefin (containing ethylene), and unsaturated carboxylic acids thereof Examples thereof include anhydrides of unsaturated carboxylic acids, polyolefins such as their esters and copolymers of saponified metal salts, polyamides, fluororesins, and mixtures of these synthetic polymers. From these, an appropriate combination of two kinds of synthetic polymers is selected according to the purpose of use.

【００２３】中でも、主体繊維として用いるには、融点
２００℃以上のアルキレンテレフタレートを主たる成分
とするポリエステル同士の組合せが、バインダー繊維と
の混綿を考える際、融解せず、主体繊維として繊維の特
性が残存するために好ましい。代表的な例は、オルトク
ロロフェノールを溶媒として、温度３５℃で測定した極
限粘度が０．１ｄＬ／ｇ以上異なるアルキレンテレフタ
レートを主たる成分とするポリエステル同士の組合せ、
ポリアルキレンテレフタレート／（イソフタル酸および
／または５−ナトリウムスルホイソフタル酸の２０モル
％以下共重合したポリアルキレンテレフタレート）の組
合せ等が挙げられる。Among them, when used as a main fiber, a combination of polyesters having an alkylene terephthalate having a melting point of 200 ° C. or higher as a main component does not melt when considering blending with a binder fiber, and the characteristics of the fiber as the main fiber are It is preferable because it remains. A typical example is a combination of polyesters having alkylene terephthalate as a main component, which have an intrinsic viscosity measured at a temperature of 35 ° C. and a difference of 0.1 dL / g or more using orthochlorophenol as a solvent,
Examples include a combination of polyalkylene terephthalate / (polyalkylene terephthalate copolymerized with 20 mol% or less of isophthalic acid and / or 5-sodium sulfoisophthalic acid).

【００２４】また、バインダー性能をもつ熱接着性繊維
として使用される場合は、融点差が２０℃以上、より好
ましくは３０〜２００℃の範囲にある低融点合成重合体
と高融点合成重合体との組合せとすることが好ましい。
２０℃以上の融点差があれば、熱接着処理時、高融点合
成重合体は融解せずに繊維形成性成分として残り、不織
布の嵩高性が維持される。なお、バインダーとしての性
能を有するためには、低融点合成重合体が繊維表面の少
なくとも一部を長さ方向に連続して形成されることが必
要である。また、２種の合成重合体の複合比率は、重量
比で低融点合成重合体／高融点合成重合体＝８０／２０
〜２０／８０の範囲にあることがよい。偏芯芯鞘型複合
繊維の場合は、芯比が８０重量％を超えると、鞘部分が
小さいため熱融着繊維としてのバインダー効果が小さく
なり、芯比が２０重量％を下回ると、潜在捲縮性能を適
切な範囲とするのが難しくなる。更に好ましい範囲は、
芯／鞘＝７０／３０〜３０／７０の範囲である。When used as a heat-adhesive fiber having a binder property, a low-melting point synthetic polymer and a high-melting point synthetic polymer having a melting point difference of 20 ° C. or more, more preferably in the range of 30 to 200 ° C. It is preferable to use a combination of
If there is a difference in melting point of 20 ° C. or higher, the high melting point synthetic polymer does not melt during the heat bonding treatment and remains as a fiber-forming component, and the bulkiness of the nonwoven fabric is maintained. In order to have the performance as a binder, it is necessary that the low melting point synthetic polymer is formed continuously on at least a part of the fiber surface in the length direction. In addition, the composite ratio of the two kinds of synthetic polymers is, by weight ratio, low melting point synthetic polymer / high melting point synthetic polymer = 80/20.
It is preferably in the range of 20/80. In the case of the eccentric core-sheath type composite fiber, when the core ratio exceeds 80% by weight, the binder effect as the heat-sealing fiber becomes small because the sheath portion is small, and when the core ratio falls below 20% by weight, the latent winding It becomes difficult to set the shrinkage performance to an appropriate range. A more preferable range is
Core / sheath = 70/30 to 30/70.

【００２５】また、低融点合成重合体としてポリオレフ
ィンを用い、高融点合成重合体としてポリアルキレンテ
レフタレートを用いた複合繊維の場合は、必要な平面捲
縮（捲縮数および捲縮率）をより確実に付与することが
でき、より優れた３次元捲縮を発現することができる。Further, in the case of a composite fiber in which polyolefin is used as the low melting point synthetic polymer and polyalkylene terephthalate is used as the high melting point synthetic polymer, the required planar crimp (number of crimps and crimp ratio) is more reliable. And more excellent three-dimensional crimp can be developed.

【００２６】さらに、低融点合成重合体として５０〜２
００℃の融点あるいは軟化点をもつイソフタル酸共重合
ポリアルキレンテレフタレートを用い、高融点合成重合
体としてポリアルキレンテレフタレートを用いた複合繊
維の場合も必要な平面捲縮（捲縮数および捲縮率）をよ
り確実に付与することができ、より優れた３次元捲縮を
発現することができる。この場合、低融点合成重合体と
して用いるイソフタル酸共重合ポリアルキレンテレフタ
レートは、結晶性であっても非晶性であってもよいが、
５０〜２００℃の融点または軟化点をもつことが好まし
い。融点または軟化点が５０℃未満ではエアレイドウェ
ブ形成時の擦過熱によりウェブ形成途中で３次元捲縮を
発現あるいはバインダー繊維同士が接着する可能性があ
り好ましくない。また、２００℃より高くなるとバイン
ダーとしては融点が高すぎ、熱処理による３次元捲縮が
発現しにくくなる。Further, as a low melting point synthetic polymer, 50 to 2
Planar crimps (number of crimps and crimping ratio) required for composite fibers using polyalkylene terephthalate copolymerized with isophthalic acid having a melting point or softening point of 00 ° C and a high melting point synthetic polymer Can be applied more reliably, and a more excellent three-dimensional crimp can be developed. In this case, the isophthalic acid copolymerized polyalkylene terephthalate used as the low melting point synthetic polymer may be crystalline or amorphous,
It preferably has a melting point or softening point of 50 to 200 ° C. If the melting point or softening point is less than 50 ° C., three-dimensional crimps may be expressed or binder fibers may be bonded to each other during the web formation due to rubbing heat during air-laid web formation, which is not preferable. On the other hand, if the temperature is higher than 200 ° C., the melting point of the binder is too high, and it becomes difficult for the three-dimensional crimps to appear due to the heat treatment.

【００２７】前記のイソフタル酸共重合ポリアルキレン
テレフタレートの代表的例としては、イソフタル酸を酸
成分の２０〜６０モル％共重合したポリエチレンテレフ
タレート、イソフタル酸を酸成分の５〜６０モル％共重
合したポリトリメチレンテレフタレート、イソフタル酸
を酸成分の３〜５５モル％共重合したポリブチレンテレ
フタレート、イソフタル酸を酸成分の１〜２０モル％共
重合したポリヘキサメチレンテレフタレートが上げられ
るが、不織布の堅さ、反発性を維持する面でイソフタル
酸共重合ポリエチレンテレフタレートが好ましい。As typical examples of the above-mentioned isophthalic acid-copolymerized polyalkylene terephthalate, polyethylene terephthalate obtained by copolymerizing isophthalic acid with 20 to 60 mol% of the acid component and isophthalic acid copolymerized with 5 to 60 mol% of the acid component are copolymerized. Polytrimethylene terephthalate, polybutylene terephthalate in which isophthalic acid is copolymerized with 3 to 55 mol% of acid component, and polyhexamethylene terephthalate in which isophthalic acid is copolymerized with 1 to 20 mol% of acid component are available. In terms of maintaining resilience, isophthalic acid-copolymerized polyethylene terephthalate is preferable.

【００２８】また、前記の融点または軟化点を満たす範
囲であれば、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、アジピン酸、セバシン
酸、アゼライン酸、ドデカン酸、１，４−シクロヘキサ
ンジカルボン酸などの酸成分と、エチレングリコール、
１，３−プロパンジオール、１，４−ブタンジオール、
１，５−ペンタンジオール、１，６−ヘキサンジオー
ル、ジエチレングリコール、１，４−シクロヘキサンジ
オール、１，４−シクロヘキサンジメタノール等のジオ
ール成分を共重合させても差支えない。Within the range satisfying the above melting point or softening point, 2,6-naphthalene dicarboxylic acid, 5-sodium sulfoisophthalic acid, adipic acid, sebacic acid, azelaic acid, dodecanoic acid, 1,4-cyclohexane. Acid component such as dicarboxylic acid, ethylene glycol,
1,3-propanediol, 1,4-butanediol,
It does not matter even if a diol component such as 1,5-pentanediol, 1,6-hexanediol, diethylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol is copolymerized.

【００２９】さらに、８０〜２００℃の融点をもつ熱可
塑性エラストマーを熱接着性成分とした本発明の複合繊
維は、エアレイド加工工程通過性が良好でより優れたウ
ェブの地合いの実現をもたらす。Further, the conjugate fiber of the present invention containing a thermoplastic elastomer having a melting point of 80 to 200 ° C. as a heat-adhesive component has good passability in the air-laid processing step and provides a better web texture.

【００３０】熱可塑性エラストマーとしては、ポリウレ
タン系エラストマーやポリエステル系エラストマー等が
挙げられる。ポリウレタン系エラストマーとしては、分
子量が５００〜６０００程度の低融点ポリオール、例え
ばジヒドロキシポリエーテル、ジヒドロキシポリエステ
ル、ジヒドロキシポリカーボネート、ジヒドロキシポリ
エステルアミド等と、分子量５００以下の有機ジイソシ
アネート、例えばｐ，ｐ′―ジフェニルメタンジイソシ
アネート、トリレンジイソシアネート、イソホロンジイ
ソシアネート、水素化ジフェニルメタンジイソシアネー
ト、キシリレンジイソシアネート、２，６―ジイソシア
ネートメチルカプロエート、ヘキサメチレンジイソシア
ネート等と、分子量５００以下の鎖伸長剤、例えばグリ
コール、アミノアルコールあるいはトリオールとの反応
により得られるポリマーである。Examples of thermoplastic elastomers include polyurethane elastomers and polyester elastomers. As the polyurethane elastomer, a low melting point polyol having a molecular weight of about 500 to 6000, such as dihydroxypolyether, dihydroxypolyester, dihydroxypolycarbonate, dihydroxypolyesteramide, and an organic diisocyanate having a molecular weight of 500 or less, such as p, p'-diphenylmethane diisocyanate, Reaction of tolylene diisocyanate, isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, xylylene diisocyanate, 2,6-diisocyanate methyl caproate, hexamethylene diisocyanate, etc. with a chain extender having a molecular weight of 500 or less, such as glycol, amino alcohol or triol. Is a polymer obtained by

【００３１】これらのポリマーのうち、特に好ましいも
のはポリオールとしてポリテトラメチレングリコール、
またはポリ―ε―カプロラクトンあるいはポリブチレン
アジペートを用いたポリウレタンである。この場合、有
機ジイソシアネートとしてはｐ，ｐ′―ジフェニルメタ
ンジイソシアネートが好適である。また、鎖伸長剤とし
ては、ｐ，ｐ′―ビスヒドロキシエトキシベンゼンおよ
び１，４―ブタンジオールが好適である。Among these polymers, particularly preferable one is polytetramethylene glycol as a polyol,
Alternatively, it is a polyurethane using poly-ε-caprolactone or polybutylene adipate. In this case, p, p'-diphenylmethane diisocyanate is preferable as the organic diisocyanate. As the chain extender, p, p'-bishydroxyethoxybenzene and 1,4-butanediol are suitable.

【００３２】一方、ポリエステル系エラストマーとして
は、熱可塑性ポリエステルをハードセグメントとし、ポ
リ（アルキレンオキシド）グリコールをソフトセグメン
トとして共重合してなるポリエーテルエステルブロック
共重合体が挙げられる。より具体的にはテレフタル酸、
イソフタル酸、フタル酸、ナフタレン―２，６―ジカル
ボン酸、ナフタレン―２，７―ジカルボン酸、ジフェニ
ル―４，４′―ジカルボン酸、ジフェノキシエタンジカ
ルボン酸、３―スルホイソフタル酸ナトリウム等の芳香
族ジカルボン酸、１，４―シクロヘキサンジカルボン酸
等の脂環族ジカルボン酸、コハク酸、シュウ酸、アジピ
ン酸、セバシン酸、ドデカンジ酸、ダイマー酸等の脂肪
族ジカルボン酸またはこれらのエステル形成性誘導体な
どから選ばれたジカルボン酸の少なくとも１種と、１，
４―ブタンジオール、エチレングリコール、トリメチレ
ングリコール、テトラメチレングリコール、ペンタメチ
レングリコール、ヘキサメチレングリコール、ネオペン
チルグリコール、デカメチレングリコール等の脂肪族ジ
オール、あるいは１，１―シクロヘキサンジメタノー
ル、１，４―シクロヘキサンジメタノール、トリシクロ
デカンジメタノール等の脂環族ジオール、またはこれら
のエステル形成性誘導体などから選ばれたジオール成分
の少なくとも１種、および平均分子量が約４００〜５０
００程度の、ポリエチレングリコール、ポリ（１，２―
および１，３―プロピレンオキシド）グリコール、ポリ
（テトラメチレンオキシド）グリコール、エチレンオキ
シドとプロピレンオキシドとの共重合体、エチレンオキ
シドとテトラヒドロフランとの共重合体等のポリ（アル
キレンオキシド）グリコールのうち少なくとも１種から
構成される３元共重合体である。On the other hand, examples of the polyester elastomer include a polyether ester block copolymer obtained by copolymerizing thermoplastic polyester as a hard segment and poly (alkylene oxide) glycol as a soft segment. More specifically, terephthalic acid,
Aromatic such as isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4'-dicarboxylic acid, diphenoxyethanedicarboxylic acid, sodium 3-sulfoisophthalate From alicyclic dicarboxylic acids such as dicarboxylic acid and 1,4-cyclohexanedicarboxylic acid, succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanedioic acid, dimer acid and other aliphatic dicarboxylic acids or their ester-forming derivatives At least one selected dicarboxylic acid, 1,
Aliphatic diols such as 4-butanediol, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, neopentyl glycol and decamethylene glycol, or 1,1-cyclohexanedimethanol, 1,4- At least one diol component selected from alicyclic diols such as cyclohexanedimethanol and tricyclodecanedimethanol, or ester-forming derivatives thereof, and an average molecular weight of about 400 to 50.
About 00, polyethylene glycol, poly (1,2-
And at least one of poly (alkylene oxide) glycols such as 1,3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, a copolymer of ethylene oxide and propylene oxide, and a copolymer of ethylene oxide and tetrahydrofuran. It is a terpolymer that is composed.

【００３３】さらに、８０〜２００℃の融点をもつ不飽
和カルボン酸および不飽和カルボン酸無水物から選ばれ
た少なくとも一種を含む不飽和化合物がグラフト重合さ
れた変成ポリオレフィンのような表面摩擦の高い合成重
合体を熱接着性成分とした本発明の複合繊維は、エアレ
イド加工工程通過性が良好でより優れたウェブの地合い
の実現をもたらす。Further, a synthesis with high surface friction such as a modified polyolefin obtained by graft-polymerizing an unsaturated compound having a melting point of 80 to 200 ° C. and containing at least one kind selected from unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides. The conjugate fiber of the present invention containing a polymer as a heat-adhesive component has good passability in the air-laid processing step and brings about a better web formation.

【００３４】８０〜２００℃の融点をもつ不飽和カルボ
ン酸および不飽和カルボン酸無水物から選ばれた少なく
とも一種を含む不飽和化合物（以下ビニルモノマーと称
することがある）がグラフト重合された変成ポリオレフ
ィンとしては、不飽和カルボン酸、その酸無水物から選
ばれた少なくとも１種を含むモノマー、具体的には無水
マレイン酸、マレイン酸、アクリル酸、メタクリル酸等
から選択された不飽和カルボン酸、あるいはその無水物
を必須の変成成分とし、それ以外のビニルモノマーをも
含むものが挙げられる。Modified polyolefin graft-polymerized with an unsaturated compound having a melting point of 80 to 200 ° C. and containing at least one kind selected from unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides (hereinafter sometimes referred to as vinyl monomer). As the unsaturated carboxylic acid, a monomer containing at least one selected from an acid anhydride thereof, specifically, an unsaturated carboxylic acid selected from maleic anhydride, maleic acid, acrylic acid, methacrylic acid, or the like, or Examples thereof include those containing the anhydride as an essential modified component and also containing other vinyl monomers.

【００３５】さらに、それ以外のビニルモノマーとし
て、ラジカル重合性に優れた汎用モノマーを使用するこ
とができる。例えば、スチレン、α−メチルスチレン等
のスチレン類、メタクリル酸メチル、メタクリル酸エチ
ル、メタクリル酸２−ヒドロキシエチル、メタクリル酸
ジメチルアミノエチル等のメタクリル酸エステル類、或
いは同様なアクリル酸エステル等を挙げることができ
る。Further, as the other vinyl monomer, a general-purpose monomer excellent in radical polymerizability can be used. Examples thereof include styrenes such as styrene and α-methylstyrene, methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, 2-hydroxyethyl methacrylate and dimethylaminoethyl methacrylate, or similar acrylic acid esters. You can

【００３６】これらのビニルモノマーの変成ポリオレフ
ィン中の重合割合は０.０５〜２モル／ｋｇである。そ
のうち不飽和カルボン酸若しくは酸無水物の合計量は、
０.０３〜２モル／ｋｇである。The polymerization ratio of these vinyl monomers in the modified polyolefin is 0.05 to 2 mol / kg. Among them, the total amount of unsaturated carboxylic acid or acid anhydride is
It is 0.03 to 2 mol / kg.

【００３７】これらのビニルモノマーを幹ポリマーにグ
ラフト重合するのは通常の方法で行うことができ、ラジ
カル開始剤を用いて、ポリオレフィンに不飽和カルボン
酸若しくは酸無水物とビニルモノマーを混合してランダ
ム共重合体からなる側鎖を導入し、あるいは異種モノマ
ーを順次重合することによるブロック共重合体からなる
側鎖を導入することができる。Graft polymerization of these vinyl monomers onto the trunk polymer can be carried out by a usual method. A radical initiator is used to mix the unsaturated carboxylic acid or acid anhydride and the vinyl monomer with a random initiator to randomly polymerize them. A side chain composed of a copolymer can be introduced, or a side chain composed of a block copolymer can be introduced by sequentially polymerizing different monomers.

【００３８】変成ポリオレフィンの幹ポリマーは、ポリ
エチレン、ポリプロピレン、ポリブテンー１等が用いら
れる。ポリエチレンとしては高密度、直鎖状低密度、低
密度ポリエチレンが用いられる。これらは密度０．９０
〜０．９７ｇ／ｃｍ3のホモ若しくは他のα−オレフィ
ンとの共重合体であり、融点は１００〜１３５℃程度の
ポリマーである。ポリプロピレンは、融点１３０〜１７
０℃の結晶性重合体であり、ホモ若しくは他のオレフィ
ンとの共重合体である。ポリブテン−１は、融点１１０
〜１３０℃の結晶性重合体であり、ホモ若しくは他のオ
レフィンとの共重合体である。As the backbone polymer of the modified polyolefin, polyethylene, polypropylene, polybutene-1 and the like are used. As polyethylene, high density, linear low density or low density polyethylene is used. These have a density of 0.90
˜0.97 g / cm 3 of homopolymer or copolymer with other α-olefin and having a melting point of about 100 to 135 ° C. Polypropylene has a melting point of 130 to 17
It is a crystalline polymer at 0 ° C. and is a homopolymer or a copolymer with other olefins. Polybutene-1 has a melting point of 110
It is a crystalline polymer at ˜130 ° C. and a homopolymer or a copolymer with other olefins.

【００３９】これらのポリマーの中では、融点範囲、グ
ラフト反応の容易性を考慮するとポリエチレンが好まし
い。変成ポリオレフィンは、単一のみならず、上記変成
ポリオレフィンの２種以上の混合物、若しくは変成ポリ
オレフィンと幹ポリマーの混合物として用いることがで
きる。Among these polymers, polyethylene is preferred in view of the melting point range and the ease of graft reaction. The modified polyolefin can be used not only as a single material, but also as a mixture of two or more kinds of the modified polyolefin or a mixture of the modified polyolefin and the trunk polymer.

【００４０】このような性質の異なる２種の合成重合体
を偏心芯鞘型あるいは並列型に複合した複合繊維からな
り、本発明の要件を満たす単糸繊度、繊維長、顕在捲縮
形態および潜在捲縮性能を有する繊維は以下の方法で製
造することができる。It is composed of a composite fiber in which two kinds of synthetic polymers having different properties as described above are compounded in an eccentric core-sheath type or a parallel type, and has a single yarn fineness, a fiber length, an actual crimped form and a latent state which satisfy the requirements of the present invention. The fiber having crimping performance can be produced by the following method.

【００４１】すなわち、２種のペレット化した各々異な
った特性を有する合成重合体を各々その特性に応じた条
件で乾燥後、２基のスクリュー押出機等の合成重合体溶
融混合機を装備した複合紡糸設備で各々溶融し、公知の
偏心芯鞘型あるいは並列型の複合紡糸口金で２種の溶融
重合体を複合させて吐出し、冷却風で空冷しながら速度
１５０〜３０００ｍ／分で引き取り、エアレイドウェブ
成型上必要な油剤を付与した後、所定の繊維長にカット
することにより得られる。なお、捲き取りと油剤付与の
間に、１０〜８０℃の温度下でネック延伸を施してもよ
い。ただし、延伸温度が８０℃を超えたり、緊張状態や
弛緩状態で８０℃超の高温で熱処理すると、配向異方性
が低減し、必要な３次元捲縮が発現しなくなる傾向があ
るので好ましくない。従って、捲縮数や捲縮率を調整す
るためには短時間で熱処理してもよい。That is, two types of pelletized synthetic polymers having different characteristics are dried under conditions according to the characteristics, and then combined with a synthetic polymer melt mixer such as two screw extruders. Each of them is melted in a spinning facility, and two kinds of molten polymers are compounded and discharged by a known eccentric core-sheath type or parallel type composite spinneret, and taken out at a speed of 150 to 3000 m / min while air-cooling with cooling air, and air-laid. It can be obtained by applying an oil agent necessary for web molding and then cutting it into a predetermined fiber length. Note that neck stretching may be performed at a temperature of 10 to 80 ° C. between the winding and the application of the oil agent. However, if the stretching temperature exceeds 80 ° C., or if heat treatment is performed at a high temperature of more than 80 ° C. in a tension state or a relaxation state, the orientation anisotropy is reduced, and the necessary three-dimensional crimp tends not to appear, which is not preferable. . Therefore, heat treatment may be performed in a short time in order to adjust the number of crimps and the crimp rate.

【００４２】潜在捲縮を発現させるための熱処理は、繊
維に張力がかからない、いわゆる弛緩状態で行う。弛緩
熱処理の方法としては、乾熱による熱風循環方式、加熱
スチームを用いた湿熱方式等を効果的に用いることがで
きる。熱風循環方式としては、処理する不織布に対し両
面より熱風が吹き出すシュリンク・ドライヤーやサクシ
ョンバンド方式の熱処理機を用いればよい。The heat treatment for developing the latent crimp is performed in a so-called relaxed state in which no tension is applied to the fiber. As the relaxation heat treatment method, a hot air circulation method using dry heat, a wet heat method using heating steam, and the like can be effectively used. As a hot air circulation method, a shrink dryer or a heat treatment machine of a suction band method in which hot air is blown from both sides of the nonwoven fabric to be treated may be used.

【００４３】弛緩熱処理における熱処理温度は、エアレ
イド法不織布を形成する繊維の構成重合体のうち、本発
明の繊維を主体繊維として用いる場合は、最も融点の低
い重合体の融点より５〜３０℃低い温度条件を適用す
る。処理温度と低融点重合体の融点との差が５℃未満で
あると、繊維は、潜在捲縮能を顕在化させるものの、低
融点重合体が溶融してしまう場合があり、不織布が全面
的に硬化することがあるため好ましくない。The heat treatment temperature in the relaxation heat treatment is 5 to 30 ° C. lower than the melting point of the polymer having the lowest melting point when the fiber of the present invention is used as the main fiber among the constituent polymers of the fiber forming the air-laid nonwoven fabric. Apply temperature conditions. If the difference between the treatment temperature and the melting point of the low melting point polymer is less than 5 ° C., the fibers may exhibit latent crimping ability, but the low melting point polymer may be melted, and the nonwoven fabric may be entirely covered. It is not preferable because it may harden.

【００４４】一方、低融点重合体の融点よりも３０℃を
超える低い温度で弛緩熱処理を行うと、繊維の潜在捲縮
が充分に顕在化しない場合があり、不織布の嵩高性が不
十分となる場合があるので好ましくない。また、バイン
ダー繊維として用いる場合は、複合繊維の低融点合成重
合体の融点より１０℃以上高く、かつ高融点合成重合体
の融点より低い温度条件に設定する。On the other hand, when the relaxation heat treatment is carried out at a temperature lower than the melting point of the low melting point polymer by more than 30 ° C., the latent crimp of the fiber may not be sufficiently manifested, and the bulkiness of the nonwoven fabric becomes insufficient. In some cases, it is not preferable. When used as a binder fiber, the temperature is set to 10 ° C. or more higher than the melting point of the low melting point synthetic polymer of the composite fiber and lower than the melting point of the high melting point synthetic polymer.

【００４５】熱処理温度が低融点合成重合体の融点の１
０℃未満であると、バインダー繊維としての性能が発現
しない場合があり、高融点合成重合体の融点を超えると
バインダー繊維全体が融ける場合があり、不織布の風合
いが硬くなったり、嵩高性が不十分となる場合があるの
で好ましくない。The heat treatment temperature is 1 of the melting point of the low melting point synthetic polymer.
If the temperature is lower than 0 ° C, the performance as a binder fiber may not be exhibited, and if the temperature exceeds the melting point of the high-melting-point synthetic polymer, the entire binder fiber may be melted, and the texture of the nonwoven fabric may be hard or bulkiness may be poor. It is not preferable because it may be sufficient.

【００４６】なお、本発明のエアレイド法不織布用繊維
は、その特性を損なわない範囲であれば、触媒、着色防
止剤、耐熱剤、難燃剤、艶消剤、蛍光増白剤、着色剤、
滑剤、酸化防止剤、紫外線吸収剤、親水剤、撥水剤、抗
菌剤、消臭剤、芳香剤、機能性セラミックス等の添加剤
を含有していてもよい。The fiber for an air-laid non-woven fabric of the present invention is a catalyst, a color-preventing agent, a heat-resistant agent, a flame retardant, a matting agent, an optical brightening agent, a coloring agent, as long as its characteristics are not impaired.
It may contain additives such as a lubricant, an antioxidant, an ultraviolet absorber, a hydrophilic agent, a water repellent, an antibacterial agent, a deodorant, an aromatic and a functional ceramics.

【００４７】[0047]

【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。 （ａ）極限粘度（〔η〕） オルトクロロフェノールを溶媒として、温度３５℃で測
定した。EXAMPLES The present invention will be described in more detail below with reference to examples. Each item in the examples was measured by the following method. (A) Intrinsic viscosity ([η]) Orthochlorophenol was used as a solvent and measured at a temperature of 35 ° C.

【００４８】（ｂ）メルトフローレイト（ＭＦＲ） ＪＩＳ Ｋ７２１０記載の方法に従った。(B) Melt flow rate (MFR) The method described in JIS K7210 was followed.

【００４９】（ｃ）融点（Ｔｍ） ＪＩＳ Ｋ７１２１記載の示査走査熱量測定（ＤＳＣ）
に従って得たＤＳＣ曲線における吸熱ピーク温度として
定義する。(C) Melting point (Tm) Inspecting scanning calorimetry (DSC) described in JIS K7121
Is defined as the endothermic peak temperature in the DSC curve obtained according to.

【００５０】（ｄ）軟化点（Ｔｓ） 結晶融点をもたないポリマーに限り、ＪＩＳ Ｋ７１２
１記載の示査走査熱量測定（ＤＳＣ）に従って得たＤＳ
Ｃ曲線におけるガラス転移温度として定義する。(D) Softening point (Ts) Only for polymers having no crystal melting point, JIS K712
DS obtained according to differential scanning calorimetry (DSC) described in 1.
It is defined as the glass transition temperature on the C curve.

【００５１】（ｅ）捲縮数、捲縮率 所定の繊維長に切断前のトウより単糸を取り、ＪＩＳ
Ｌ １０１５ ７．１２に記載の方法により測定した。
なお、熱処理後の３次元捲縮に関しては、トウを単糸毎
に分離して、熱風乾燥器にて１６０℃で２分間（バイン
ダー繊維が１６０℃２分間の熱処理により接着しない場
合は１８０℃で２分間）熱処理し、室温まで冷却後、同
様の方法で測定した。３次元捲縮数はスパイラル１周期
につき２個とみなした。(E) Number of crimps and crimp ratio A single yarn is taken from the tow before cutting to a predetermined fiber length and JIS
It was measured by the method described in L 1015 7.12.
Regarding the three-dimensional crimp after the heat treatment, the tow is separated into individual yarns, and the hot air dryer is used at 160 ° C. for 2 minutes (when the binder fibers are not adhered by the heat treatment of 160 ° C. for 2 minutes, the temperature is 180 ° C.). After heat treatment for 2 minutes and cooling to room temperature, measurement was performed by the same method. The number of three-dimensional crimps was considered to be two per spiral cycle.

【００５２】（ｆ）繊度 ＪＩＳ Ｌ １０１５ ７．５．１ Ａ法に記載の方法
により測定した。(F) Fineness The fineness was measured by the method described in JIS L 1015 7.5.1 A method.

【００５３】（ｇ）繊維長 ＪＩＳ Ｌ １０１５ ７．４．１ Ｃ法に記載の方法
により測定した。(G) Fiber length: Measured by the method described in JIS L 1015 7.4.1 C method.

【００５４】（ｈ）油剤付着率 所定繊維重量に対し、繊維から３０℃のメタノールによ
って浴比１：２０で１０分間抽出した残査の重量を測定
し、所定繊維重量で除した値を用いた。(H) Adhesion rate of oil agent The weight of the residue extracted from the fiber for 10 minutes at a bath ratio of 1:20 with methanol at 30 ° C. was measured against the predetermined fiber weight, and the value divided by the predetermined fiber weight was used. .

【００５５】（ｉ）熱収縮応力ピーク温度 カネボウ製収縮応力測定器を使用し、５cmの輪状糸を作
り、測定把持部に糸条を把持させ昇温速度１２０秒／３
００℃、初荷重０．０９ｃＮ／ｄｔｅｘで行い、収縮応
力が極大となる温度として定義した。(I) Thermal shrinkage stress peak temperature Using a Kanebo shrinkage stress measuring instrument, a ring-shaped yarn of 5 cm was made, and the yarn was gripped by the measurement gripping portion, and the heating rate was 120 seconds / 3.
It was defined as the temperature at which the shrinkage stress reaches its maximum when it was performed at 00 ° C. and an initial load of 0.09 cN / dtex.

【００５６】（ｊ）ウェブ嵩高性 以下の手順で作成したエアレイドウェブサンプルの平均
厚さを測定し、ウェブ嵩高性とした。Ｄａｎ−Ｗｅｂｆ
ｏｒｍｉｎｇ社のフォーミングドラムユニット（６００
ｍｍ幅、フォーミングドラムの孔形状２．４ｍｍ×２０
ｍｍの長方形、開孔率４０％）を用いてドラム回転数２
００ｒｐｍ、ニードルロール回転数９００ｒｐｍ、ウェ
ブ搬送速度３０ｍ／分の条件で、目付３５ｇ／ｍ2のエ
アレイドウェブを採取した。２５ｃｍ四方に切り取った
エアレイドウェブを、１６０℃で２分間（（バインダー
繊維が１６０℃、２分間の熱処理により接着しない場合
は１８０℃で２分間）熱処理して、測定用エアレイドウ
ェブサンプルとした。(J) Web Bulkiness The average thickness of the air-laid web sample prepared according to the following procedure was measured to obtain the web bulkiness. Dan-Webf
Forming drum unit of Orming (600
mm width, hole shape of forming drum 2.4 mm x 20
mm rectangle, open area ratio 40%) and drum rotation speed 2
An airlaid web having a basis weight of 35 g / m 2 was collected under the conditions of 00 rpm, a needle roll rotation speed of 900 rpm, and a web transport speed of 30 m / min. The air-laid web cut into a 25 cm square was heat-treated at 160 ° C. for 2 minutes ((180 ° C. for 2 minutes if the binder fibers were not bonded by heat treatment at 160 ° C. for 2 minutes) to obtain a measurement air-laid web sample.

【００５７】（ｋ）ウェブ地合均一性 前項（ｊ）で作成したエアレイドウェブを、製造進行方
向に３ｃｍ、製造幅方向に６０ｃｍとなるように切断
し、さらに３ｃｍ角に切断し、サンプル２０枚を採取し
た。このサンプル２０枚の重量を測定し、その変動係数
（標準偏差／平均値）をウェブ地合均一性とした。変動
係数が小さいほどウェブの地合が均一であると定義し
た。また、エアレイドウェブサンプル表面の未開繊繊維
の有無も観察した。(K) Uniformity of web formation The air-laid web prepared in (j) above is cut into 3 cm in the production direction and 60 cm in the production width direction, and further cut into 3 cm squares to obtain 20 samples. Was collected. The weight of 20 samples was measured, and the coefficient of variation (standard deviation / average value) was taken as the web formation uniformity. The smaller the coefficient of variation, the more uniform the web formation. The presence or absence of unopened fibers on the surface of the air-laid web sample was also observed.

【００５８】［実施例１］ ［η］０．６４、Ｔｍ２５６℃のポリエチレンテレフタ
レート（以下ＰＥＴと称する）ペレットを、１７０℃で
７時間乾燥した後、スクリュー式押出機にて２９０℃で
溶融し、２８０℃に保たれたスピンブロックに導入し、
図１−ａに示す形状の吐出孔を２１０個穿設した中空繊
維形成用紡糸口金通して吐出量１９０ｇ／分で吐出し、
紡糸口金面下１５ｍｍの位置で、２５℃の冷却用空気を
１．２ｍ／秒の流速でポリマー流の片側から糸条の進行
方向に垂直な角度で吹き当て、冷却・固化し、１１５０
ｍ／分の速度で引き取り、未延伸ＰＥＴ繊維を得た。Example 1 Polyethylene terephthalate (hereinafter referred to as PET) pellets having [η] of 0.64 and Tm of 256 ° C. were dried at 170 ° C. for 7 hours and then melted at 290 ° C. by a screw type extruder, Introduced into the spin block kept at 280 ℃,
Discharge at a discharge rate of 190 g / min through a hollow fiber forming spinneret having 210 discharge holes of the shape shown in FIG.
At a position 15 mm below the surface of the spinneret, cooling air at 25 ° C. was blown at a flow rate of 1.2 m / sec from one side of the polymer flow at an angle perpendicular to the yarn advancing direction to cool and solidify 1150.
It was taken out at a speed of m / min to obtain an undrawn PET fiber.

【００５９】次いで、得られた未延伸繊維を５０万デシ
テックスのトウに引き揃えた後、第１段延伸温度７０℃
で１．９倍、第２段延伸温度９０℃で１．０５倍、総延
伸倍率２．０倍に温水延伸し、ラウリルホスフェートカ
リウム塩／ポリオキシエチレン変成シリコンを８０／２
０の重量比でミックスしてなる紡績用油剤を０．２０重
量％付与した後、５ｍｍの繊維長にカットし、単繊維繊
度４．０デシテックスであり、中空率３３％のＰＥＴ繊
維（以下繊維Ａと称する）を得た。Next, the obtained unstretched fibers were aligned in a tow of 500,000 decitex, and then the first stage stretching temperature was 70 ° C.
1.9 times, 1.05 times at the second stage drawing temperature of 90 ° C., hot water drawing to a total drawing ratio of 2.0 times, and 80/2 of lauryl phosphate potassium salt / polyoxyethylene modified silicon.
After adding 0.20% by weight of a spinning oil mixed in a weight ratio of 0, the fiber was cut to a fiber length of 5 mm, the single fiber fineness was 4.0 decitex, and the PET fiber had a hollow ratio of 33% (hereinafter referred to as fiber). Referred to as A).

【００６０】この繊維Ａの顕在捲縮は、捲縮数で０山／
２５ｍｍおよび捲縮率で０％であり明瞭な平面捲縮は認
められなかった。１６０℃で２分間の熱処理後に発現し
た捲縮は、捲縮数１８山／２５ｍｍおよび捲縮率３５％
の３次元スパイラル捲縮であった。また繊維Ａの熱収縮
応力ピーク温度は９５℃であった。The actual crimp of this fiber A is 0 peak / number of crimps.
It was 25 mm and the crimping rate was 0%, and no clear flat crimp was observed. The crimps developed after heat treatment at 160 ° C. for 2 minutes have a crimp number of 18 peaks / 25 mm and a crimp ratio of 35%.
It was a three-dimensional spiral crimp. The heat shrinkage stress peak temperature of the fiber A was 95 ° C.

【００６１】繊維Ａとは別途、［η］０．６４、Ｔｍ２
５６℃のＰＥＴを芯成分とし、酸成分がモル比でテレフ
タル酸成分：イソフタル酸成分＝６０：４０、ジオール
成分がモル比でエチレングリコール：ジエチレングリコ
ール＝９５：５の割合で共重合された［η］０．５６、
Ｔｓ６４℃の非晶性共重合ポリエチレンテレフタレート
（以下ｃｏ−ＰＥＴと称する）とを鞘成分として、芯／
鞘重量比５０／５０となした同芯芯鞘型複合繊維であ
り、中実断面の、単繊維繊度２．２デシテックス、繊維
長５ｍｍ、捲縮数１１山／２５ｍｍおよび捲縮率１２％
の平面ジグザグ捲縮を有する複合繊維（以下繊維Ｂと称
する）を準備した。Separately from the fiber A, [η] 0.64, Tm2
Using 56 ° C. PET as a core component, the acid component was copolymerized at a molar ratio of terephthalic acid component: isophthalic acid component = 60: 40, and the diol component at a molar ratio of ethylene glycol: diethylene glycol = 95: 5. ] 0.56,
Amorphous copolymer polyethylene terephthalate (hereinafter referred to as co-PET) having a Ts of 64 ° C. as a sheath component
It is a concentric core-sheath composite fiber with a sheath weight ratio of 50/50, a solid cross section, a single fiber fineness of 2.2 decitex, a fiber length of 5 mm, a crimp number of 11 threads / 25 mm, and a crimp ratio of 12%.
1. A composite fiber having a flat zigzag crimp (hereinafter referred to as fiber B) was prepared.

【００６２】この繊維Ｂには、繊維Ａと同じくラウリル
ホスフェートカリウム塩／ポリオキシエチレン変成シリ
コンを８０／２０の重量比でミックスしてなる紡績用油
剤を０．２５重量％付与した。また１６０℃で２分間の
熱処理後に発現した捲縮は、捲縮数で１０山／２５ｍｍ
および捲縮率で１５％であり、明瞭な３次元捲縮は認め
られなかった。また繊維Ｂの熱収縮応力ピーク温度は１
１０℃であった。To this fiber B was added 0.25% by weight of a spinning oil, which was prepared by mixing lauryl phosphate potassium salt / polyoxyethylene-modified silicon at a weight ratio of 80/20, similarly to the fiber A. In addition, the number of crimps developed after heat treatment at 160 ° C. for 2 minutes is 10 peaks / 25 mm.
The crimp ratio was 15%, and no clear three-dimensional crimp was observed. The peak temperature of heat shrinkage stress of the fiber B is 1
It was 10 ° C.

【００６３】次に、繊維Ａをウェブを構成する主体繊維
となし、繊維Ｂを熱接着成分となすように、繊維Ａ：繊
維Ｂの重量比を８５：１５の割合として混綿しエアレイ
ド成型し、１６０℃の熱風乾燥器中で２分間熱処理し
て、目付３５ｇ／ｍ2のエアレイドウェブを得た。この
エアレイドウェブの地合い均一性は０．０３であり、未
開繊繊維塊は全く認められなかった。ウェブ嵩高性は９
ｍｍであり、充分な嵩高性が発現していた。Next, the fiber A is used as a main fiber constituting the web, and the fiber B is used as a heat-bonding component. The weight ratio of the fiber A to the fiber B is 85:15, and the fibers are air-laid and molded. Heat treatment was performed for 2 minutes in a hot air dryer at 160 ° C. to obtain an airlaid web having a basis weight of 35 g / m 2 . The formation uniformity of this air-laid web was 0.03, and no unopened fiber lumps were observed. Web bulkiness is 9
mm, and sufficient bulkiness was exhibited.

【００６４】［比較例１］実施例１の繊維（Ａ）の製法
において、５ｍｍの繊維長にカット後、１３５℃の弛緩
熱処理を施して、捲縮数１１．２山／２５ｍｍ、捲縮率
３３％のスパイラル状の顕在捲縮を付与した他は実施例
１と同様として、単繊維繊度４．５デシテックス、中空
率３２％、熱収縮応力ピーク温度が存在しないＰＥＴ繊
維（以下繊維Ｃと称する）を得た。１６０℃で２分間の
熱処理後に発現した繊維Ｃの３次元捲縮は、捲縮数で１
９山／２５ｍｍおよび捲縮率で３４％のスパイラル捲縮
であった。[Comparative Example 1] In the method for producing the fiber (A) of Example 1, the fiber was cut to a fiber length of 5 mm and then subjected to relaxation heat treatment at 135 ° C. to obtain a crimp number of 11.2 crests / 25 mm and a crimp ratio. A PET fiber (hereinafter referred to as a fiber C) having a single fiber fineness of 4.5 decitex, a hollow ratio of 32%, and a heat shrinkage stress peak temperature not present, in the same manner as in Example 1 except that a spiral crimp of 33% was applied. ) Got. The three-dimensional crimp of the fiber C developed after the heat treatment at 160 ° C. for 2 minutes is 1 in terms of the number of crimps.
The number of spiral crimps was 9 threads / 25 mm and the crimping ratio was 34%.

【００６５】これを実施例１記載の繊維Ｂと重量比８
５：１５の割合で混綿しエアレイド成型し、１６０℃の
熱風乾燥器中で２分間熱処理して、目付３５ｇ／ｍ2の
エアレイドウェブを得た。このエアレイドウェブのウェ
ブ嵩高性は７ｍｍであったが、地合い均一性は０．２４
であり、ウェブ表面に多数の未開繊繊維塊が認められ
た。This was mixed with the fiber B described in Example 1 in a weight ratio of 8
The mixture was mixed at a ratio of 5:15, air-laid, and heat-treated in a hot air dryer at 160 ° C. for 2 minutes to obtain an air-laid web having a basis weight of 35 g / m 2 . The web loft of this air-laid web was 7 mm, but the formation uniformity was 0.24.
And many unopened fiber lumps were recognized on the web surface.

【００６６】［実施例２］ ［η］０．４０、Ｔｍ２５６℃のＰＥＴのペレットおよ
び［η］０．４７、Ｔｍ２５３℃である５−ナトリウム
スルホイソフタル酸２．６モル共重合ポリエチレンテレ
フタレート（以下ＣＤ−ＰＥＴと称する）のペレット
を、各々１７０℃で７時間乾燥した後、スクリュー式押
出機を２基設置した複合紡糸設備を用い、各々２９５℃
で溶融し、２８０℃に保たれたスピンブロックに導入
し、図１（ｂ）に示す形状の吐出孔を６００個穿設した
紡糸口金を組み込んだ並列型複合繊維形成スピンパック
を介して，ＰＥＴが芯、ＣＤ−ＰＥＴが鞘となるよう
に、複合し、吐出量３５０ｇ／分で吐出し、紡糸口金面
下３０ｍｍの位置で、３０℃の冷却用空気を０．５ｍ／
秒の流速でポリマー流の片側から糸条の進行方向に垂直
な角度で吹き当て、冷却・固化し、１１００ｍ／分の速
度で紡糸引き取りし、ＰＥＴ／ＣＤ−ＰＥＴ（複合重量
比率５０／５０）の複合未延伸繊維を得た。[Example 2] PET pellets of [η] 0.40, Tm 256 ° C and 2.6 mol of 5-sodium sulfoisophthalic acid having [η] 0.47, Tm 253 ° C copolymerized polyethylene terephthalate (hereinafter referred to as CD -Referred to as PET) after drying at 170 ° C for 7 hours, and then using a composite spinning facility equipped with two screw type extruders, each at 295 ° C.
It was melted by the above method and introduced into a spin block kept at 280 ° C., and PET was introduced through a parallel type composite fiber forming spin pack incorporating a spinneret in which 600 discharge holes having the shape shown in FIG. Core, and CD-PET as a sheath, and the mixture was discharged at a discharge rate of 350 g / min. At a position 30 mm below the spinneret surface, cooling air at 30 ° C. was added at 0.5 m / min.
Sprayed from one side of the polymer stream at an angle perpendicular to the yarn traveling direction at a flow rate of 2 seconds, cooled and solidified, and spun off at a speed of 1100 m / min, PET / CD-PET (composite weight ratio 50/50) To obtain a composite unstretched fiber.

【００６７】次いで、得られた未延伸繊維を５０万デシ
テックスのトウに引き揃えた後、延伸温度７０℃で２．
９倍に温水延伸し、ラウリルホスフェートカリウム塩／
ポリオキシエチレン変成シリコンを８０／２０の重量比
でミックスしてなる紡績用油剤を０．２０重量％付与し
た後、クリンパーで捲縮数１１山／２５ｍｍ、捲縮率１
１％の平面ジグザグ捲縮を付与した後、５ｍｍの繊維長
にカットし、単繊維繊度１．８デシテックスおよび図２
（ｃ）に示すような繊維断面（中空率３％）をもつ複合
繊維（以下繊維Ｄと称する）を得た。Then, the obtained unstretched fibers were aligned with a tow of 500,000 decitex, and then stretched at 70 ° C. for 2.
9 times warm water drawing, lauryl phosphate potassium salt /
After applying 0.20% by weight of a spinning oil made by mixing polyoxyethylene-modified silicon at a weight ratio of 80/20, the number of crimps is 11 peaks / 25 mm, and the crimping rate is 1 with a crimper.
After applying a flat zigzag crimp of 1%, the fiber was cut to a fiber length of 5 mm, and the single fiber fineness was 1.8 decitex and FIG.
A composite fiber (hereinafter referred to as fiber D) having a fiber cross section (hollow ratio 3%) as shown in (c) was obtained.

【００６８】１６０℃で２分間の熱処理後に発現した繊
維Ｄの捲縮は、捲縮数５０山／２５ｍｍおよび捲縮率４
５％のスパイラル状の３次元捲縮であった。また繊維Ｄ
の熱収縮応力ピーク温度は１３５℃であった。The crimps of the fiber D developed after the heat treatment at 160 ° C. for 2 minutes have a crimp number of 50 peaks / 25 mm and a crimp ratio of 4
It was a 5% spiral-shaped three-dimensional crimp. Fiber D
The heat shrinkage stress peak temperature was 135 ° C.

【００６９】次に、繊維Ｄをウェブを構成する主体繊維
となし、繊維Ｂを熱接着成分となすように、繊維Ｄ：繊
維Ｂの重量比を８５：１５の割合として混綿しエアレイ
ド成型し、１６０℃の熱風乾燥器中で２分間熱処理し
て、目付３５ｇ／ｍ2のエアレイドウェブを得た。この
エアレイドウェブの地合い均一性は０．０２であり、未
開繊繊維塊は全く認められなかった。ウェブ嵩高性は８
ｍｍであり、充分な嵩高性が発現していた。Next, the fibers D were made into the main constituent fibers of the web, and the fibers B were made into the heat-adhesive component, and the fibers D: fibers B were mixed at a weight ratio of 85:15 and air-laid and molded. Heat treatment was performed for 2 minutes in a hot air dryer at 160 ° C. to obtain an airlaid web having a basis weight of 35 g / m 2 . The formation uniformity of this air-laid web was 0.02, and no unopened fiber lumps were observed. Web bulkiness is 8
mm, and sufficient bulkiness was exhibited.

【００７０】［比較例２］クリンパーで付与する平面ジ
グザグ捲縮を、捲縮数１８山／２５ｍｍ、捲縮率２３％
のとする以外は、実施例２と同様にして、繊維Ｅを得
た。１６０℃で２分間の熱処理後に発現した繊維Ｅの３
次元捲縮は、捲縮数で５０山／２５ｍｍおよび捲縮率で
４５％のスパイラル状の３次元捲縮であった。[Comparative Example 2] The planar zigzag crimps applied with a crimper were crimped at 18 peaks / 25 mm and crimping ratio 23%.
Fiber E was obtained in the same manner as in Example 2 except that 3 of fiber E developed after heat treatment at 160 ° C for 2 minutes
The three-dimensional crimp was a spiral three-dimensional crimp having a crimp number of 50 peaks / 25 mm and a crimp rate of 45%.

【００７１】繊維Ｅと繊維Ｂとを重量比８５：１５の割
合で混綿してエアレイド成型し、１６０℃の熱風乾燥器
中で２分間熱処理して、目付３５ｇ／ｍ2のエアレイド
ウェブを得た。このエアレイドウェブのウェブ嵩高性は
５ｍｍであり、充分な嵩は発現しなかった。地合い均一
性は０．１３であり、ウェブ表面に多数の未開繊繊維塊
が認められた。Fiber E and fiber B were mixed at a weight ratio of 85:15, air-laid and heat-treated in a hot air dryer at 160 ° C. for 2 minutes to obtain an air-laid web having a basis weight of 35 g / m 2 . . The web bulkiness of this air-laid web was 5 mm, and sufficient bulk was not developed. Formation uniformity was 0.13, and many unopened fiber lumps were observed on the web surface.

【００７２】［比較例３］ ［η］０．４０、Ｔｍ２５６℃のＰＥＴに替えて［η］
０．６４、Ｔｍ２５６℃のＰＥＴペレットを用いる以外
は実施例２と同じ方法、条件で、捲縮数１１山／２５ｍ
ｍおよび捲縮率１１％の顕在平面ジグザク捲縮を有す
る、単繊維繊度２．０デシテックスおよび図２（ｃ）に
示すような繊維断面（中空率３％）の複合繊維（以下繊
維Ｆと称する）を得た。[Comparative Example 3] [η] was replaced by [η] 0.40, PET with Tm 256 ° C. [η]
The number of crimps is 11 peaks / 25 m under the same method and conditions as in Example 2 except that PET pellets having a temperature of 0.64 and a Tm of 256 ° C. are used.
m and a manifest flat zigzag crimp with a crimp ratio of 11%, and a composite fiber having a single fiber fineness of 2.0 decitex and a fiber cross section (hollow ratio 3%) as shown in FIG. 2C (hereinafter referred to as fiber F). ) Got.

【００７３】１６０℃で２分間の熱処理後に発現した繊
維Ｆの捲縮は、捲縮数２２山／２５ｍｍおよび捲縮率１
５％のスパイラル状の３次元捲縮であった。また、繊維
Ｆの熱収縮応力ピーク温度は１５５℃であった。The crimps of the fiber F developed after the heat treatment at 160 ° C. for 2 minutes have a crimp number of 22 peaks / 25 mm and a crimp ratio of 1
It was a 5% spiral-shaped three-dimensional crimp. The peak temperature of heat shrinkage stress of the fiber F was 155 ° C.

【００７４】繊維Ｆと繊維Ｂとを重量比８５：１５の割
合で混綿してエアレイド成型し、１６０℃の熱風乾燥器
中で２分間熱処理して、目付３５ｇ／ｍ2のエアレイド
ウェブを得た。このエアレイドウェブの地合い均一性は
０．０２であり、均一な表面を呈していたが、ウェブ嵩
高性は３ｍｍであり、嵩はほとんど発現していなかっ
た。Fiber F and fiber B were mixed at a weight ratio of 85:15 and air-laid, and heat-treated in a hot air dryer at 160 ° C. for 2 minutes to obtain an air-laid web having a basis weight of 35 g / m 2 . . The formation uniformity of this air-laid web was 0.02 and a uniform surface was exhibited, but the bulkiness of the web was 3 mm and the bulk was hardly exhibited.

【００７５】［実施例３］ ［η］０．６４、Ｔｍ２５６℃のＰＥＴペレットを１７
０℃で７時間乾燥した。また、メルトフローレイト（Ｍ
ＦＲ）２０ｇ／１０分、Ｔｍ１３５℃である高密度ポリ
エチレン（以下ＨＤＰＥと称する）ペレットを準備し
た。[Example 3] PET pellets having [η] of 0.64 and Tm of 256 ° C were used as 17 pellets.
It was dried at 0 ° C. for 7 hours. In addition, the melt flow rate (M
FR) 20 g / 10 min, Tm135 ° C. High density polyethylene (hereinafter referred to as HDPE) pellets were prepared.

【００７６】スクリュー式押出機を２基設置した複合紡
糸設備を用い、乾燥したＰＥＴペレットを押出機に供給
し２９０℃で溶融し、一方ＨＤＰＥは乾燥すること無く
押出機に供給し２５０℃で溶融し、２つの溶融ポリマー
流を２８０℃に保たれたスピンブロックに導入し、図１
（ｂ）に示すような吐出孔を６００個穿設した紡糸口金
を組み込んだ偏芯芯鞘型複合繊維形成スピンパックを介
して、ＰＥＴが芯、ＨＤＰＥが鞘となるように、複合
し、吐出量４４０ｇ／分で吐出し、紡糸口金面下４０ｍ
ｍの位置で、３０℃の冷却用空気を０．５ｍ／秒の流速
でポリマー流の片側から糸条の進行方向に垂直な角度で
吹き当て、冷却・固化し、１１００ｍ／分の速度で紡糸
引き取りし、ＰＥＴ／ＨＤＰＥ（複合重量比率５０／５
０）の複合未延伸繊維を得た。Dry PET pellets were fed to the extruder and melted at 290 ° C., while HDPE was fed to the extruder without drying and melted at 250 ° C., using a composite spinning facility equipped with two screw type extruders. Then, the two molten polymer streams were introduced into a spin block kept at 280 ° C.
Through an eccentric core-sheath type composite fiber forming spin pack incorporating a spinneret having 600 discharge holes as shown in (b), PET is the core and HDPE is the core, and the composite is discharged. Discharge at 440g / min, 40m below the spinneret surface
At a position of m, a cooling air of 30 ° C. is blown at a flow rate of 0.5 m / sec from one side of the polymer stream at an angle perpendicular to the traveling direction of the yarn, cooled and solidified, and spun at a speed of 1100 m / min. Collected and PET / HDPE (composite weight ratio 50/5
The composite undrawn fiber of 0) was obtained.

【００７７】次いで、得られた未延伸繊維を４０万デシ
テックスのトウに引き揃えた後、延伸温度７０℃で３．
０倍に温水延伸し、ラウリルホスフェートカリウム塩／
ポリオキシエチレン変成シリコンを８０／２０の重量比
でミックスしてなる紡績用油剤を０．２５重量％付与し
た後、クリンパーで捲縮数１１山／２５ｍｍ、捲縮率１
１％の平面ジグザグ捲縮を付与した後、５ｍｍの繊維長
にカットし、弛緩熱収縮処理を施こさずに、単繊維繊度
２．４デシテックスおよび図２（ｄ）に示すような繊維
断面（中空率２％）をもつ複合繊維（以下繊維Ｇと称す
る）を得た。Then, the obtained unstretched fibers were aligned in a tow of 400,000 dtex, and then stretched at a stretching temperature of 70 ° C. for 3.
Hot water drawing to 0 times, lauryl phosphate potassium salt /
After adding 0.25% by weight of a spinning oil made by mixing polyoxyethylene-modified silicon at a weight ratio of 80/20, crimping rate is 11 threads / 25 mm, crimping rate is 1
After applying a flat zigzag crimp of 1%, the fiber was cut to a fiber length of 5 mm, and the relaxation heat shrinkage treatment was not performed. The single fiber fineness was 2.4 decitex and the fiber cross section as shown in FIG. A composite fiber (hereinafter referred to as fiber G) having a hollow ratio of 2%) was obtained.

【００７８】１６０℃で２分間の熱処理後に発現した繊
維Ｇの捲縮は、捲縮数３５山／２５ｍｍおよび捲縮率４
０％のスパイラル状の３次元捲縮であった。また繊維Ｄ
の熱収縮応力ピーク温度は９５℃であった。The crimps of the fiber G developed after the heat treatment at 160 ° C. for 2 minutes have a crimp number of 35 peaks / 25 mm and a crimp ratio of 4
It was a 0% spiral three-dimensional crimp. Fiber D
The heat shrinkage stress peak temperature was 95 ° C.

【００７９】繊維Ｇ１００％をエアレイド成形し、１６
０℃の熱風乾燥器中で２分間熱処理して、目付３５ｇ／
ｍ2のエアレイドウェブを得た。このエアレイドウェブ
の地合い均一性は０．０２であり、未開繊繊維塊は全く
認められなかった。ウェブ嵩高性は７ｍｍであり、充分
な嵩高性が発現していた。Fiber 100% was air-laid into 16
Heat treated for 2 minutes in a hot air dryer at 0 ° C, and have a basis weight of 35 g /
A m 2 airlaid web was obtained. The formation uniformity of this air-laid web was 0.02, and no unopened fiber lumps were observed. The bulkiness of the web was 7 mm, and sufficient bulkiness was exhibited.

【００８０】［実施例４］ ［η］０．６４、Ｔｍ２５６℃のＰＥＴペレットを１７
０℃で７時間乾燥した。また、［η］０．５６、Ｔｓ６
４℃のｃｏ−ＰＥＴペレットを１．３ｋＰａの減圧下
で、２４時間減圧乾燥した。[Example 4] PET pellets having [η] of 0.64 and Tm of 256 ° C were used.
It was dried at 0 ° C. for 7 hours. Also, [η] 0.56, Ts6
The co-PET pellets at 4 ° C were dried under reduced pressure of 1.3 kPa for 24 hours under reduced pressure.

【００８１】各々スクリュー式押出機を２基設置した複
合紡糸設備を用い、乾燥したＰＥＴペレットは２９０℃
で、ｃｏ−ＰＥＴペレットは２３０℃で溶融し、２つの
溶融ポリマー流を２８０℃に保たれたスピンブロックに
導入し、図１（ｂ）に示すような吐出孔を６００個穿設
した紡糸口金を組み込んだ偏芯芯鞘型複合繊維形成スピ
ンパックを介して、ＰＥＴが芯、ｃｏ−ＰＥＴが鞘とな
るように、複合し、吐出量４４０ｇ／分で吐出し、紡糸
口金面下４０ｍｍの位置で、３０℃の冷却用空気を０．
５ｍ／秒の流速でポリマー流の片側から糸条の進行方向
に垂直な角度で吹き当て、冷却・固化し、１１００ｍ／
分の速度で紡糸引き取りし、ＰＥＴ／ｃｏ−ＰＥＴ（複
合重量比率５０／５０）の複合未延伸繊維を得た。Dry PET pellets were heated to 290 ° C. using a composite spinning facility equipped with two screw type extruders.
Then, the co-PET pellets were melted at 230 ° C., two molten polymer streams were introduced into a spin block kept at 280 ° C., and a spinneret having 600 discharge holes as shown in FIG. Via an eccentric core-sheath type composite fiber forming spin pack incorporating PET such that PET serves as a core and co-PET serves as a sheath, and the mixture is discharged at a discharge rate of 440 g / min, and positioned 40 mm below the spinneret face. And cooling air at 30 ° C.
At a flow rate of 5 m / sec, the polymer stream is sprayed from one side at an angle perpendicular to the direction of travel of the yarn, cooled and solidified, and 1100 m / sec.
The fiber was taken out by spinning at a speed of minutes to obtain a composite undrawn fiber of PET / co-PET (composite weight ratio 50/50).

【００８２】次いで、得られた未延伸繊維を５０万デシ
テックスのトウに引き揃えた後、延伸温度７０℃で３．
５倍に温水延伸し、ラウリルホスフェートカリウム塩／
ポリオキシエチレン変成シリコンを８０／２０の重量比
でミックスしてなる紡績用油剤を０．２５重量％付与し
た後、クリンパーで捲縮数１１山／２５ｍｍ、捲縮率１
１％の平面ジグザグ捲縮を付与した後、５ｍｍの繊維長
にカットし、弛緩熱収縮処理を施こさずに、単繊維繊度
１．９デシテックス繊維および図２（ｄ）に示すような
繊維断面（中空率２％）をもつ複合繊維（以下繊維Ｈと
称する）を得た。Then, the obtained unstretched fibers were aligned in a tow of 500,000 decitex, and then stretched at a stretching temperature of 70 ° C. for 3.
Hot water stretching 5 times, lauryl phosphate potassium salt /
After adding 0.25% by weight of a spinning oil made by mixing polyoxyethylene-modified silicon at a weight ratio of 80/20, crimping rate is 11 threads / 25 mm, crimping rate is 1
After applying a flat zigzag crimp of 1%, it was cut to a fiber length of 5 mm, and was not subjected to a relaxation heat shrinkage treatment, but a single fiber fineness of 1.9 decitex fiber and a fiber cross section as shown in FIG. 2 (d). A composite fiber having a (hollowness of 2%) (hereinafter referred to as fiber H) was obtained.

【００８３】１６０℃で２分間の熱処理後に発現した繊
維Ｈの捲縮は、捲縮数４３山／２５ｍｍおよび捲縮率４
５％のスパイラル状の３次元捲縮であった。また、繊維
Ｈの熱収縮応力ピーク温度８２℃であった。The crimps of the fiber H developed after the heat treatment at 160 ° C. for 2 minutes had a crimp number of 43 peaks / 25 mm and a crimp ratio of 4
It was a 5% spiral-shaped three-dimensional crimp. Further, the heat shrinkage stress peak temperature of the fiber H was 82 ° C.

【００８４】繊維Ｈ１００％をエアレイド成形し、１６
０℃の熱風乾燥器中で２分間熱処理して、目付３５ｇ／
ｍ2のエアレイドウェブを得た。このエアレイドウェブ
の地合い均一性は０．０７であり、未開繊繊維塊は全く
認められなかった。ウェブ嵩高性は７ｍｍであり、充分
な嵩高性が発現していた。100% of the fiber H was air-laid to obtain 16
Heat treated for 2 minutes in a hot air dryer at 0 ° C, and have a basis weight of 35 g /
A m 2 airlaid web was obtained. The formation uniformity of this air-laid web was 0.07, and no unopened fiber lumps were observed at all. The bulkiness of the web was 7 mm, and sufficient bulkiness was exhibited.

【００８５】［実施例５］ ［η］０．８５、Ｔｍ２２０℃のポリブチレンテレフタ
レート（以下ＰＢＴと称する）ペレットを１５０℃で７
時間乾燥した。また、酸成分がモル比でテレフタル酸成
分：イソフタル酸成分＝７０：３０、ジオール成分が
１，４−ブタンジオールであるハードセグメント６０重
量％と重量平均分子量１５００のポリテトラメチレンオ
キシドグリコールからなるソフトセグメント４０重量％
とする［η］１．１５、Ｔｍ１５３℃のポリエステルエ
ラストマー（以下ＥＬ−ＰＢＴと称する）ペレットを１
１０℃で１２時間乾燥した。[Example 5] Polybutylene terephthalate (hereinafter referred to as PBT) pellets having [η] 0.85 and Tm of 220 ° C were used at 150 ° C for 7 hours.
Dried for hours. Further, a soft composition comprising 60% by weight of a hard segment in which the acid component is a molar ratio of terephthalic acid component: isophthalic acid component = 70: 30, the diol component is 1,4-butanediol and polytetramethylene oxide glycol having a weight average molecular weight of 1500. 40% by weight of segment
[Η] 1.15, Tm 153 ° C. polyester elastomer (hereinafter referred to as EL-PBT) pellets 1
It was dried at 10 ° C. for 12 hours.

【００８６】スクリュー式押出機を２基設置した複合紡
糸設備を用い、乾燥したＰＢＴペレットは２７０℃、Ｅ
Ｌ−ＰＢＴペレットは２３０℃で溶融し、２つの溶融ポ
リマー流を２７０℃に保たれたスピンブロックに導入
し、図１（ｂ）に示すような吐出孔を６００個穿設した
紡糸口金を組み込んだ偏芯芯鞘型複合繊維形成スピンパ
ックを介して、ＰＢＴが芯、ＥＬ−ＰＢＴが鞘となるよ
うに、複合し、吐出量４４０ｇ／分で吐出し、紡糸口金
面下４０ｍｍの位置で、３０℃の冷却用空気を０．５ｍ
／秒の流速でポリマー流の片側から糸条の進行方向に垂
直な角度で吹き当て、冷却・固化し、１１００ｍ／分の
速度で紡糸引き取りし、ＰＢＴ／ＥＬ−ＰＢＴ（複合重
量比率５０／５０）の複合未延伸繊維を得た。Using a composite spinning equipment equipped with two screw type extruders, the dried PBT pellets were heated at 270 ° C., E
The L-PBT pellets were melted at 230 ° C., two molten polymer streams were introduced into a spin block kept at 270 ° C., and a spinneret having 600 discharge holes as shown in FIG. 1 (b) was incorporated. Through the eccentric core-sheath type composite fiber forming spin pack, PBT serves as a core and EL-PBT serves as a sheath, and is compounded and discharged at a discharge rate of 440 g / min, at a position 40 mm below the spinneret face, 0.5m of cooling air at 30 ° C
At a flow rate of / sec, the polymer stream is sprayed from one side at an angle perpendicular to the direction of advance of the yarn, cooled and solidified, spun off at a speed of 1100 m / min, and PBT / EL-PBT (composite weight ratio 50/50 ) Of the composite undrawn fiber was obtained.

【００８７】次いで、得られた未延伸繊維を５０万デシ
テックスのトウに引き揃えた後、延伸温度７０℃で２．
８倍に温水延伸し、ラウリルホスフェートカリウム塩／
ポリオキシエチレン変成シリコンを８０／２０の重量比
でミックスしてなる紡績用油剤を０．２３重量％付与し
た後、クリンパーで捲縮数１２山／２５ｍｍ、捲縮率７
％の平面ジグザグ捲縮を付与した後、５ｍｍの繊維長に
カットし、弛緩熱収縮処理を施こさずに、単繊維繊度
３．０デシテックス繊維および図２（ｄ）に示すような
繊維断面（中空率２％）をもつ複合繊維（以下繊維Ｉと
称する）を得た。Then, the obtained unstretched fibers were aligned in a tow of 500,000 decitex, and then stretched at a stretching temperature of 70 ° C. for 2.
8 times hot water drawing, lauryl phosphate potassium salt /
After applying 0.23% by weight of a spinning oil made by mixing polyoxyethylene-modified silicon at a weight ratio of 80/20, the number of crimps is 12 peaks / 25 mm and the crimp ratio is 7 with a crimper.
% Planar zigzag crimp and then cut to a fiber length of 5 mm, without a relaxation heat shrinkage treatment, a single fiber fineness of 3.0 decitex fiber and a fiber cross section as shown in FIG. A composite fiber (hereinafter referred to as fiber I) having a hollowness of 2%) was obtained.

【００８８】１８０℃で２分間の熱処理後に発現した繊
維Ｉの捲縮は、捲縮数２８山／２５ｍｍおよび捲縮率３
５％のスパイラル状の３次元捲縮であった。また、繊維
ＨＩ熱収縮応力ピーク温度９５℃であった。The crimps of the fiber I developed after the heat treatment at 180 ° C. for 2 minutes had a crimp number of 28 peaks / 25 mm and a crimp ratio of 3
It was a 5% spiral-shaped three-dimensional crimp. The fiber HI heat shrinkage stress peak temperature was 95 ° C.

【００８９】繊維Ｉ１００％でエアレイド成形し、１８
０℃の熱風乾燥器中で２分間熱処理して、目付３５ｇ／
ｍ2のエアレイドウェブを得た。このエアレイドウェブ
の地合い均一性は０．０５であり、未開繊繊維塊は全く
認められなかった。ウェブ嵩高性は６ｍｍであり、充分
な嵩高性が発現していた。Fiber I 100% air laid, 18
Heat treated for 2 minutes in a hot air dryer at 0 ° C, and have a basis weight of 35 g /
A m 2 airlaid web was obtained. The uniformity of the formation of this air-laid web was 0.05, and no unopened fiber lump was observed. The bulkiness of the web was 6 mm, and sufficient bulkiness was exhibited.

【００９０】［実施例６］ ［η］０．６４、Ｔｍ２５６℃のＰＥＴペレットを１７
０℃で７時間乾燥した。また、直鎖状低密度ポリエチレ
ンを幹ポリマーとして無水マレイン酸とメタクリル酸を
混合してグラフト共重合した（無水マレイン酸含量０.
２１ｇモル／kg、メタクリル酸含量０.２８モル／k
g）、ＭＦＲ１８ｇ／１０分、Ｔｍ９６℃の酸変成ポリ
エチレン（以下Ｍ−ＰＥと称する）ペレットを１．３ｋ
Ｐａの減圧下で、２４時間減圧乾燥した。[Example 6] PET pellets having [η] of 0.64 and Tm of 256 ° C were used for 17 times.
It was dried at 0 ° C. for 7 hours. Further, linear low-density polyethylene was used as a trunk polymer, and maleic anhydride and methacrylic acid were mixed and graft-copolymerized (maleic anhydride content: 0.1).
21 g mol / kg, methacrylic acid content 0.28 mol / k
g), MFR 18 g / 10 min, Tm 96 ° C., acid-modified polyethylene (hereinafter referred to as M-PE) pellets 1.3 k
It was dried under reduced pressure of Pa for 24 hours.

【００９１】スクリュー式押出機を２基設置した複合紡
糸設備を用い、乾燥したＰＥＴペレットは２９０℃、Ｍ
−ＰＥは２３０℃で溶融し、２つの溶融ポリマー流を２
８０℃に保たれたスピンブロックに導入し、図１（ｂ）
に示すような吐出孔を６００個穿設した紡糸口金を組み
込んだ偏芯芯鞘型複合繊維形成スピンパックを介して、
ＰＥＴが芯、Ｍ−ＰＥが鞘となるように、複合し、複合
し、吐出量４４０ｇ／分で吐出し、紡糸口金面下４０ｍ
ｍの位置で、３０℃の冷却用空気を０．５ｍ／秒の流速
でポリマー流の片側から糸条の進行方向に垂直な角度で
吹き当て、冷却・固化し、１１００ｍ／分の速度で紡糸
引き取りし、ＰＥＴ／Ｍ−ＰＥ（複合重量比率５０／５
０）の複合未延伸繊維を得た。Dry PET pellets were dried at 290 ° C., M
-PE melts at 230 ° C and the two molten polymer streams are
Introduced into a spin block kept at 80 ° C, Fig. 1 (b)
Via an eccentric core-sheath type composite fiber forming spin pack incorporating a spinneret having 600 discharge holes as shown in
It is compounded so that PET is the core and M-PE is the sheath, and it is compounded and discharged at a discharge rate of 440 g / min, 40 m below the spinneret surface.
At a position of m, a cooling air of 30 ° C. is blown at a flow rate of 0.5 m / sec from one side of the polymer stream at an angle perpendicular to the traveling direction of the yarn, cooled and solidified, and spun at a speed of 1100 m / min. Collected, PET / M-PE (composite weight ratio 50/5
The composite undrawn fiber of 0) was obtained.

【００９２】次いで、得られた未延伸繊維を５０万デシ
テックスのトウに引き揃えた後、延伸温度７０℃で３．
０倍に温水延伸し、ラウリルホスフェートカリウム塩／
ポリオキシエチレン変成シリコンを８０／２０の重量比
でミックスしてなる紡績用油剤を０．３５重量％付与し
た後、クリンパーで捲縮数１０山／２５ｍｍ、捲縮率
７．５％の平面ジグザグ捲縮を付与した後、５ｍｍの繊
維長にカットし、弛緩熱収縮処理を施こさずに、単繊維
繊度２．７デシテックスおよび図２（ｄ）に示すような
繊維断面（中空率２％）をもつ複合繊維（以下繊維Ｊと
称する）を得た。Then, the obtained unstretched fibers were aligned in a tow of 500,000 decitex, and then stretched at a stretching temperature of 70 ° C. for 3.
Hot water drawing to 0 times, lauryl phosphate potassium salt /
After applying 0.35% by weight of a spinning oil made by mixing polyoxyethylene-modified silicon in a weight ratio of 80/20, a crimper is used to form a flat zigzag with a crimp number of 10 threads / 25 mm and a crimp rate of 7.5%. After crimping, the fiber was cut to a fiber length of 5 mm, and the relaxation heat shrinkage treatment was not performed. The single fiber fineness was 2.7 decitex and the fiber cross section as shown in FIG. 2D (hollowness 2%). A composite fiber (hereinafter referred to as fiber J) having

【００９３】１６０℃で２分間の熱処理後に発現した繊
維Ｊの捲縮は、捲縮数４３山／２５ｍｍおよび捲縮率４
５％のスパイラル状の３次元捲縮であった。また、繊維
Ｊの熱収縮応力ピーク温度８５℃であった。The crimps of the fiber J developed after the heat treatment at 160 ° C. for 2 minutes had a crimp number of 43 peaks / 25 mm and a crimp ratio of 4
It was a 5% spiral-shaped three-dimensional crimp. The heat shrinkage stress peak temperature of the fiber J was 85 ° C.

【００９４】繊維Ｊ１００％でエアレイド成形し、１６
０℃の熱風乾燥器中で２分間熱処理して、目付３５ｇ／
ｍ2のエアレイドウェブを得た。このエアレイドウェブ
の地合い均一性は０．０７であり、未開繊繊維塊は全く
認められなかった。ウェブ嵩高性は７ｍｍであり、充分
な嵩高性が発現していた。Fiber J 100% air-laid, 16
Heat treated for 2 minutes in a hot air dryer at 0 ° C, and have a basis weight of 35 g /
A m 2 airlaid web was obtained. The formation uniformity of this air-laid web was 0.07, and no unopened fiber lumps were observed at all. The bulkiness of the web was 7 mm, and sufficient bulkiness was exhibited.

【００９５】[0095]

【発明の効果】本発明の繊維によれば、エアレイド不織
布工程での開繊不良がほとんど解消され、かつ熱処理で
繊維に充分な３次元捲縮が発現するので、良好な地合い
と優れた嵩高性を兼備した不織布を得ることができる。EFFECTS OF THE INVENTION According to the fiber of the present invention, defective opening in the air-laid non-woven fabric process is almost eliminated, and sufficient three-dimensional crimps are developed in the fiber by heat treatment, so that good texture and excellent bulkiness are obtained. It is possible to obtain a non-woven fabric that also has

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明で用いる紡糸口金吐出孔形状の実施態様
例を示した模式図。FIG. 1 is a schematic view showing an embodiment example of a spinneret discharge hole shape used in the present invention.

【図２】本発明の複合繊維の繊維断面の態様例を示した
模式図。FIG. 2 is a schematic diagram showing an example of a fiber cross section of the conjugate fiber of the present invention.

【符号の説明】[Explanation of symbols]

１ ：吐出開口部 ２、３ ：並列型複合繊維を構成する合成重合体断面 ４、５ ：偏芯芯鞘型複合繊維を構成する合成重合体断
面 ６ ：繊維断面中空部1: Discharge opening 2, 3: Synthetic polymer cross section constituting the parallel type composite fiber 4, 5: Synthetic polymer cross section constituting the eccentric core-sheath type composite fiber 6: Fiber cross section hollow part

フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｄ０１Ｄ 5/092 １０３ Ｄ０１Ｄ 5/092 １０３ Ｆターム(参考） 4L035 BB31 BB55 DD05 EE01 FF05 4L041 BA09 BA22 BA59 BC05 BD11 CA05 CA36 DD04 DD05 4L045 AA05 BA01 BA24 DA19 4L047 AA14 AA21 AA26 AA27 AB02 AB07 BA05 BA09 BB01 BB06 BB09 CB02 CB10 Front page continued (51) Int.Cl. 7 Identification code FI theme code (reference) // D01D 5/092 103 D01D 5/092 103 F term (reference) 4L035 BB31 BB55 DD05 EE01 FF05 4L041 BA09 BA22 BA59 BC05 BD11 CA05 CA36 DD04 DD05 4L045 AA05 BA01 BA24 DA19 4L047 AA14 AA21 AA26 AA27 AB02 AB07 BA05 BA09 BB01 BB06 BB09 CB02 CB10

Claims (10)

【特許請求の範囲】[Claims] 【請求項１】 合成重合体よりなる繊維であって、単繊
維繊度が０．５〜２００デシテックス、繊維長が３〜２
０ｍｍ、単繊維の平面捲縮が捲縮数で１３山／２５ｍｍ
以下および捲縮率で２０％以下であって、６０〜２００
℃の熱処理によって捲縮数１５〜８０山／２５ｍｍおよ
び捲縮率２５〜９０％の３次元捲縮を発現する特性を有
することを特徴とするエアレイド不織布用繊維。1. A fiber made of a synthetic polymer, having a single fiber fineness of 0.5 to 200 decitex and a fiber length of 3 to 2.
0 mm, the number of single-fiber crimps is 13 peaks / 25 mm
Or less and 20% or less in crimp ratio, 60 to 200
A fiber for air-laid non-woven fabric, which has a characteristic of developing a three-dimensional crimp having a crimp number of 15 to 80 threads / 25 mm and a crimp rate of 25 to 90% by heat treatment at a temperature of ° C. 【請求項２】 熱収縮応力ピーク温度を６０〜１８０℃
の範囲に有する、請求項１記載のエアレイド不織布用繊
維。2. The peak temperature of heat shrinkage stress is 60 to 180 ° C.
The fiber for air-laid non-woven fabric according to claim 1, which has a range of 1. 【請求項３】 アルキレンテレフタレートを主たる成分
とする単一のポリエステルからなることを特徴とする請
求項１または２に記載のエアレイド不織布用繊維。3. The fiber for air-laid non-woven fabric according to claim 1 or 2, comprising a single polyester containing alkylene terephthalate as a main component. 【請求項４】 ２種の合成重合体が偏芯芯鞘型あるいは
並列型に複合された複合繊維である、請求項１または２
に記載のエアレイド不織布用繊維。4. A composite fiber in which two kinds of synthetic polymers are eccentric core-sheath type or parallel type composite fibers.
The air-laid non-woven fabric fiber according to. 【請求項５】 ２種の合成重合体の双方が、融点２００
℃以上のアルキレンテレフタレートを主たる成分とする
ポリエステル合成重合体である、請求項４記載のエアレ
イド不織布用繊維。5. Both of the two synthetic polymers have a melting point of 200.
The fiber for air-laid non-woven fabric according to claim 4, which is a polyester synthetic polymer mainly composed of alkylene terephthalate having a temperature of not less than 0 ° C. 【請求項６】 融点差が２０℃以上である低融点合成重
合体と高融点合成重合体からなり、低融点合成重合体
が、繊維表面の少なくとも一部を、長さ方向に連続して
形成する熱接着性複合繊維である、請求項４記載のエア
レイド不織布用繊維。6. A low melting point synthetic polymer having a melting point difference of 20 ° C. or more and a high melting point synthetic polymer, wherein the low melting point synthetic polymer forms at least a part of the fiber surface continuously in the length direction. The fiber for air-laid non-woven fabric according to claim 4, which is a heat-bondable conjugate fiber. 【請求項７】 低融点合成重合体としてポリオレフィン
を用い、高融点合成重合体としてアルキレンテレフタレ
ートを主たる成分とするポリエステルを用いた複合繊維
である、請求項６記載のエアレイド不織布用繊維。7. The fiber for an air-laid non-woven fabric according to claim 6, which is a composite fiber in which polyolefin is used as the low-melting point synthetic polymer and polyester whose main component is alkylene terephthalate is used as the high-melting point synthetic polymer. 【請求項８】 低融点合成重合体として５０〜２００℃
の融点あるいは軟化点をもつイソフタル酸共重合ポリア
ルキレンテレフタレートを用い、高融点合成重合体とし
てポリアルキレンテレフタレートを用いた複合繊維であ
る、請求項６記載のエアレイド不織布用繊維。8. A low melting point synthetic polymer at 50 to 200 ° C.
7. The fiber for air-laid non-woven fabric according to claim 6, which is a composite fiber using an isophthalic acid copolymerized polyalkylene terephthalate having a melting point or a softening point of, and polyalkylene terephthalate as a high melting point synthetic polymer. 【請求項９】 低融点合成重合体として８０〜２００℃
の融点をもつ熱可塑性エラストマーを用いた複合繊維で
ある、請求項６記載のエアレイド不織布用繊維。9. A low melting point synthetic polymer at 80 to 200 ° C.
The fiber for air-laid non-woven fabric according to claim 6, which is a composite fiber using a thermoplastic elastomer having a melting point of. 【請求項１０】 低融点合成重合体として８０〜２００
℃の融点をもつ不飽和カルボン酸およびは不飽和カルボ
ン酸無水物から選ばれた少なくとも一種を含む不飽和化
合物がグラフト重合された変成ポリオレフィンを用いた
複合繊維である、請求項６記載のエアレイド不織布用繊
維。10. A low melting point synthetic polymer of 80 to 200.
The air-laid nonwoven fabric according to claim 6, which is a composite fiber using a modified polyolefin obtained by graft-polymerizing an unsaturated compound having a melting point of ° C and an unsaturated compound containing at least one selected from unsaturated carboxylic acid anhydrides. Textiles.
JP2001368319A 2001-11-30 2001-12-03 Fiber for air laid nonwoven fabric Pending JP2003171860A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
JP2001368319A JP2003171860A (en) 2001-12-03 2001-12-03 Fiber for air laid nonwoven fabric
AT02780134T ATE447058T1 (en) 2001-11-30 2002-11-22 MACHINE CRIMPED SYNTHETIC FIBER HAVING LATENT THREE-DIMENSIONAL CRIMPING CAPACITY AND METHOD FOR PRODUCING THE SAME
MXPA03006494A MXPA03006494A (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof.
DE60234210T DE60234210D1 (en) 2001-11-30 2002-11-22 MACHINE-RIBBED SYNTHETIC FIBER WITH LATEN THREE-DIMENSIONAL INCREASING CAPACITY AND METHOD FOR THE PRODUCTION THEREOF
AU2002343830A AU2002343830A1 (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
CNB028042999A CN100419144C (en) 2001-11-30 2002-11-22 Machine-curled synthesized fiber haivng potential 2-D. curling characteristic and production method
EP02780134A EP1452633B1 (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
PCT/JP2002/012244 WO2003046266A1 (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
KR1020037010018A KR100954704B1 (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
US10/470,342 US20040234757A1 (en) 2001-11-30 2002-11-22 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
CN 200710307425 CN101200814B (en) 2001-11-30 2002-11-22 Synthetic fiber coiled by machine and possessing potent 3-d coiling property and method for producing the same
DK02780134T DK1452633T3 (en) 2001-11-30 2002-11-22 Synthetic fiber that is wrinkled by machine power and has latent three-dimensional ripple properties, as well as a method for making it
TW091134819A TWI248994B (en) 2001-11-30 2002-11-29 Machine-crimped synthetic fibers having latent three-dimensional crimping property and process for producing same
HK04105553.4A HK1062699A1 (en) 2001-11-30 2004-07-27 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
HK04107811.8A HK1065077A1 (en) 2001-11-30 2004-10-11 Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
US11/404,826 US20060182964A1 (en) 2001-11-30 2006-04-17 Process for producing nonwoven fabric

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001368319A JP2003171860A (en) 2001-12-03 2001-12-03 Fiber for air laid nonwoven fabric

Publications (1)

Publication Number Publication Date
JP2003171860A true JP2003171860A (en) 2003-06-20

Family

ID=19177928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001368319A Pending JP2003171860A (en) 2001-11-30 2001-12-03 Fiber for air laid nonwoven fabric

Country Status (1)

Country Link
JP (1) JP2003171860A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005042289A (en) * 2003-07-10 2005-02-17 Nippon Ester Co Ltd Staple fiber for nonwoven fabric and staple fiber nonwoven fabric
JP2005211176A (en) * 2004-01-28 2005-08-11 Oji Kinocloth Co Ltd Disposable wet towel with cubic pattern
JP2006193838A (en) * 2005-01-11 2006-07-27 Nippon Ester Co Ltd Staple fiber for nonwoven fabric and staple fiber nonwoven fabric
JP2009078065A (en) * 2007-09-27 2009-04-16 Kuraray Kuraflex Co Ltd Flooring wiper
WO2009142315A1 (en) 2008-05-19 2009-11-26 Es Fibervisions Co . Ltd . Conjugate fiber for air-laid nonwoven fabric manufacture and method for manufacturing a high-density air-laid nonwoven fabric
JP2010059585A (en) * 2008-09-05 2010-03-18 Daiwabo Holdings Co Ltd Crimped conjugate fiber, and fiber structure using the same
JP2010106402A (en) * 2008-10-31 2010-05-13 Kinsei Seishi Kk Water-permeable nonwoven fabric sheet
JP2010156073A (en) * 2008-12-26 2010-07-15 Es Fibervisions Co Ltd Fiber bundle
JP2013053387A (en) * 2011-09-02 2013-03-21 Teijin Fibers Ltd Heat-bonding composite fiber and method for producing the same
JP2013155462A (en) * 2012-01-31 2013-08-15 Teijin Ltd Fiber for airlaid nonwoven fabric and airlaid nonwoven fabric comprising thermoplastic elastomer
JP2014133955A (en) * 2013-01-10 2014-07-24 Nippon Ester Co Ltd Conjugate short fiber for air-laid nonwoven fabric
CN108716027A (en) * 2018-08-31 2018-10-30 江苏江南高纤股份有限公司 The preparation method of the compound superbhort fibers of PE-PET, using and rear spinning system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005042289A (en) * 2003-07-10 2005-02-17 Nippon Ester Co Ltd Staple fiber for nonwoven fabric and staple fiber nonwoven fabric
JP4485860B2 (en) * 2003-07-10 2010-06-23 日本エステル株式会社 Short fiber for nonwoven fabric and short fiber nonwoven fabric
JP2005211176A (en) * 2004-01-28 2005-08-11 Oji Kinocloth Co Ltd Disposable wet towel with cubic pattern
JP2006193838A (en) * 2005-01-11 2006-07-27 Nippon Ester Co Ltd Staple fiber for nonwoven fabric and staple fiber nonwoven fabric
JP2009078065A (en) * 2007-09-27 2009-04-16 Kuraray Kuraflex Co Ltd Flooring wiper
US10533271B2 (en) 2008-05-19 2020-01-14 Es Fibervisions Co., Ltd. Conjugate fiber for air-laid nonwoven fabric manufacture and method for manufacturing a high-density air-laid nonwoven fabric
WO2009142315A1 (en) 2008-05-19 2009-11-26 Es Fibervisions Co . Ltd . Conjugate fiber for air-laid nonwoven fabric manufacture and method for manufacturing a high-density air-laid nonwoven fabric
JP2010059585A (en) * 2008-09-05 2010-03-18 Daiwabo Holdings Co Ltd Crimped conjugate fiber, and fiber structure using the same
JP2010106402A (en) * 2008-10-31 2010-05-13 Kinsei Seishi Kk Water-permeable nonwoven fabric sheet
JP2010156073A (en) * 2008-12-26 2010-07-15 Es Fibervisions Co Ltd Fiber bundle
JP2013053387A (en) * 2011-09-02 2013-03-21 Teijin Fibers Ltd Heat-bonding composite fiber and method for producing the same
JP2013155462A (en) * 2012-01-31 2013-08-15 Teijin Ltd Fiber for airlaid nonwoven fabric and airlaid nonwoven fabric comprising thermoplastic elastomer
JP2014133955A (en) * 2013-01-10 2014-07-24 Nippon Ester Co Ltd Conjugate short fiber for air-laid nonwoven fabric
CN108716027A (en) * 2018-08-31 2018-10-30 江苏江南高纤股份有限公司 The preparation method of the compound superbhort fibers of PE-PET, using and rear spinning system
CN108716027B (en) * 2018-08-31 2024-03-01 江苏江南高纤股份有限公司 Preparation method and application of HDPE-PET composite ultrashort fiber and post-spinning system

Similar Documents

Publication Publication Date Title
KR100954704B1 (en) Machine crimped synthetic fiber having latent three-dimensional crimpability and method for production thereof
JP4027728B2 (en) Nonwoven fabric made of polyester staple fibers
RU2440447C2 (en) Thermoadhesive double-component fibre and method of its production
JP5021938B2 (en) Thermal adhesive composite fiber and method for producing the same
US7674524B2 (en) Thermoadhesive conjugate fiber and manufacturing method of the same
JP2003171860A (en) Fiber for air laid nonwoven fabric
JP4881026B2 (en) Heat-adhesive conjugate fiber for airlaid nonwoven fabric and method for producing the same
US20090243141A1 (en) Manufacturing method of polyester fiber for airlaid nonwoven fabrics
JP4323507B2 (en) Polyester short fiber
CN101200814B (en) Synthetic fiber coiled by machine and possessing potent 3-d coiling property and method for producing the same
JP3892748B2 (en) Short fiber nonwoven fabric
JP2013133571A (en) Thermally adhesive conjugated fiber having high mechanical crimping performance and method for producing the same
JP4310170B2 (en) Thermal adhesive composite fiber for airlaid nonwoven fabric
JP4955278B2 (en) Polyester fiber for airlaid nonwoven fabric and method for producing the same
JP4945004B2 (en) Method for producing polyester fiber for airlaid nonwoven fabric
JP2011195978A (en) Heat-bonding composite fiber for producing wet nonwoven fabric, and method of producing the same
JP2009133051A (en) Short fiber nonwoven fabric
JP2009287157A (en) Staple fiber nonwoven fabric
JPH03269146A (en) Production of fiber-blended nonwoven fabric
JP2009108461A (en) Staple fiber nonwoven fabric

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Effective date: 20040521

Free format text: JAPANESE INTERMEDIATE CODE: A712

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040623

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060523

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060721

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060816

A521 Written amendment

Effective date: 20061012

Free format text: JAPANESE INTERMEDIATE CODE: A523

A131 Notification of reasons for refusal

Effective date: 20061107

Free format text: JAPANESE INTERMEDIATE CODE: A131

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20070313