JP2001064828A - Polyester-based conjugate fiber and nonwoven fabric - Google Patents

Polyester-based conjugate fiber and nonwoven fabric

Info

Publication number
JP2001064828A
JP2001064828A JP23397399A JP23397399A JP2001064828A JP 2001064828 A JP2001064828 A JP 2001064828A JP 23397399 A JP23397399 A JP 23397399A JP 23397399 A JP23397399 A JP 23397399A JP 2001064828 A JP2001064828 A JP 2001064828A
Authority
JP
Japan
Prior art keywords
polyester
fiber
nonwoven fabric
heat treatment
conjugate
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.)
Granted
Application number
JP23397399A
Other languages
Japanese (ja)
Inventor
Naohiko Nagata
直彦 永田
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.)
Unitika Ltd
Original Assignee
Unitika 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 Unitika Ltd filed Critical Unitika Ltd
Priority to JP23397399A priority Critical patent/JP2001064828A/en
Publication of JP2001064828A publication Critical patent/JP2001064828A/en
Granted legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain a latently crimpable polyester-based conjugate fiber suitable for providing a spun yarn for a nonwoven fabric or a woven or a knitted fabric having sufficient stretchability and excellent pliability and the nonwoven fabric having both the stretchability and the pliability. SOLUTION: This polyester-based conjugate fiber comprises (A) a polyester having a main recurring unit composed of an alkylene terephthalate eccentrically joined to (B) a polyester having a main recurring unit composed of trimethylene terephthalate. The conjugate fiber has values of heat shrinkage characteristics within specific ranges and is capable of developing >=50 spiral crimps/25 mm by a free shrinking heat treatment at 170 deg.C.

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、熱処理を施すとス
パイラル捲縮を発現しうる複合繊維であって、伸縮性や
柔軟性に優れる不織布や織り編み物用の紡績糸を得るこ
とができるポリエステル系複合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 polyester fiber, which is a conjugate fiber capable of exhibiting a spiral crimp when subjected to heat treatment, and is capable of obtaining a spun yarn for a nonwoven fabric or a woven or knitted fabric which is excellent in elasticity and flexibility. It relates to a conjugate fiber.

【0002】[0002]

【従来の技術】ポリエステル繊維は耐候性、耐薬品性、
W/W性等に優れた特性を有し、衣料用、産業資材用等
の様々な用途に使用されている。こうした中で近年、機
能面から、さらに伸縮性の高い繊維が要望されている。
2. Description of the Related Art Polyester fiber has weather resistance, chemical resistance,
It has excellent properties such as W / W properties and is used for various purposes such as for clothing and industrial materials. Under these circumstances, in recent years, fibers having higher elasticity have been demanded from a functional aspect.

【0003】従来、合成繊維に伸縮性を付与する方法と
して、熱収縮特性の異なるポリマーをサイドバイサイド
又は偏心芯鞘構造に複合した潜在捲縮性繊維とする方法
が数多く提案されている。例えば、特公平3−1073
7号公報や特公平4−5769号公報では、5−ナトリ
ウムスルホイソフタル酸成分を共重合したポリエチレン
テレフタレート系共重合ポリエステルと、ポリエチレン
テレフタレート(以下、PETと略する。)との複合繊
維が開示されている。また、特開平7−54216号公
報には、2,2−ビス[4−(2−ヒドロキシエトキ
シ)フェニル]プロパンを2〜7mol%、イソフタル
酸(以下、IPAと略する。)を5〜13mol%共重
合したポリエチレンテレフタレート系共重合ポリエステ
ルと、PETとの複合繊維が開示されている。さらに、
特開平10−204726号公報では、PET又はこれ
を主体とするポリエステルと、IPA1〜9mol%及
びビスフェノールAのエチレンオキサイド付加体(以
下、BAEOと略する。)を1〜5mol%共重合した
ポリエチレンテレフタレート系共重合ポリエステルとを
貼り合わせた複合繊維が提案されている。
Hitherto, many methods for imparting elasticity to synthetic fibers have been proposed as latent crimpable fibers in which polymers having different heat shrinkage properties are combined in a side-by-side or eccentric core-sheath structure. For example, Japanese Patent Publication 3-1073
No. 7 and Japanese Patent Publication No. 4-5769 disclose a composite fiber of a polyethylene terephthalate-based copolymerized polyester obtained by copolymerizing a 5-sodium sulfoisophthalic acid component and polyethylene terephthalate (hereinafter abbreviated as PET). ing. JP-A-7-54216 discloses that 2 to 7 mol% of 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane and 5 to 13 mol of isophthalic acid (hereinafter abbreviated as IPA) are disclosed. A composite fiber of a polyethylene terephthalate-based copolymerized polyester and a PET is disclosed. further,
JP-A-10-204726 discloses a polyethylene terephthalate obtained by copolymerizing 1 to 9 mol% of IPA and an ethylene oxide adduct of bisphenol A (hereinafter abbreviated as BAEO) with 1 to 5 mol% of PET or a polyester mainly composed of PET. Composite fibers obtained by laminating a system copolymerized polyester have been proposed.

【0004】しかし、これらの複合繊維では、優れた伸
縮性を付与するために高温で熱処理を行う必要があり、
得られる不織布等の風合いが硬くなるものであった。一
方、風合いを柔らかくするために熱処理温度を低くする
と、スパイラル捲縮の発現が少なく、得られる不織布等
は伸縮性に劣るものであった。
However, these composite fibers require heat treatment at a high temperature in order to impart excellent elasticity.
The texture of the resulting nonwoven fabric was hard. On the other hand, when the heat treatment temperature was lowered to soften the texture, the occurrence of spiral crimp was small, and the resulting nonwoven fabric and the like were poor in elasticity.

【0005】[0005]

【発明が解決しようとする課題】本発明は、上記した従
来の潜在捲縮性ポリエステル複合繊維の欠点を解消し、
十分な伸縮性を有し、かつ優れた柔軟性を有する不織布
や織り編み物用の紡績糸を得るのに好適な潜在捲縮性ポ
リエステル系複合繊維とそれを含む不織布を提供するこ
とを技術的な課題とするものである。
SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional latently crimpable polyester composite fiber,
A technical object of the present invention is to provide a latently crimpable polyester-based composite fiber suitable for obtaining a spun yarn for nonwoven fabric and woven knitting having sufficient elasticity and excellent flexibility, and a nonwoven fabric containing the same. It is an issue.

【0006】[0006]

【課題を解決するための手段】本発明者らは、上記の課
題を解決するために鋭意検討を行った結果、主たる繰り
返し単位がアルキレンテレフタレートからなるポリエス
テルと、トリメチレンテレフタレートが主たる繰り返し
単位であるポリエステルとを複合し、熱収縮特性を適切
な範囲とすることで、上記目的が達成できることを見出
し、本発明に到達した。
Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems. As a result, the main repeating units are a polyester composed of alkylene terephthalate and trimethylene terephthalate are the main repeating units. The present inventors have found that the above object can be achieved by compounding with polyester and setting the heat shrinkage property in an appropriate range, and reached the present invention.

【0007】すなわち、本発明は、次の(a)、(b)
の構成を有するものである。 (a)主たる繰り返し単位がアルキレンテレフタレート
からなるポリエステル(A)と、主たる繰り返し単位が
トリメチレンテレフタレートからなるポリエステル
(B)とが偏心的に接合した複合繊維であって、熱収縮
特性が下記式(1)〜(2)を満足し、かつ170℃の
自由収縮熱処理で50個/25mm以上のスパイラル捲
縮を発現することを特徴とするポリエステル系複合繊
維。 15≦Xp≦60 (1) Xq≦15 (2) ただし、Xpは下記P法で、Xqは下記Q法で測定した
乾熱収縮率を示す。P法:繊維に初荷重0.44mN/
dtexをかけて糸長L0 を測定し、次いで荷重を外し
て170℃×15分の熱処理を施した後、0.44mN
/dtexの荷重をかけて糸長L1 を測定し、次式にて
算出する。 Xp(%)=〔(L0 −L1 )/L0 〕×100 Q法:繊維に初荷重1.32mN/dtexをかけて糸
長L2 を測定し、次いで荷重を外して170℃×15分
の熱処理を施した後、2.65mN/dtexの荷重を
かけて糸長L3 を測定し、次式にて算出する。 Xq(%)={(L2 −L3 )/L2 }×100 (b)上記(a)記載のポリエステル系複合繊維を60
%以上含み、20%伸長時の伸長回復率が70%以上、
剛軟度が60cN以下であることを特徴とする不織布。
That is, the present invention provides the following (a) and (b)
It has a structure of. (A) A composite fiber in which a polyester (A) whose main repeating unit is made of alkylene terephthalate and a polyester (B) whose main repeating unit is made of trimethylene terephthalate are eccentrically bonded, and whose heat shrinkage property is represented by the following formula ( A polyester-based composite fiber that satisfies 1) to 2) and exhibits a spiral crimp of 50 pieces / 25 mm or more by a free shrink heat treatment at 170 ° C. 15 ≦ Xp ≦ 60 (1) Xq ≦ 15 (2) Here, Xp represents the dry heat shrinkage measured by the following P method, and Xq represents the following Q method. P method: Initial load 0.44mN /
After applying dtex to measure the yarn length L 0 , then removing the load and performing a heat treatment at 170 ° C. for 15 minutes, 0.44 mN
/ Under a load of dtex measure the yarn length L 1, it is calculated by the following equation. Xp (%) = [(L 0 −L 1 ) / L 0 ] × 100 Q method: An initial load of 1.32 mN / dtex is applied to the fiber to measure the yarn length L 2 , and then the load is removed and 170 ° C. × after heat treatment of 15 minutes, to measure the yarn length L 3 under a load of 2.65mN / dtex, it is calculated by the following equation. Xq (%) = {(L 2 −L 3 ) / L 2 } × 100 (b) The polyester-based composite fiber described in (a) above is
% Or more, the elongation recovery rate at 20% elongation is 70% or more,
A nonwoven fabric having a softness of 60 cN or less.

【0008】[0008]

【発明の実施の形態】以下、本発明について詳細に説明
する。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

【0009】本発明において、複合繊維の一方成分を構
成するポリエステル(A)は、主たる繰り返し単位がア
ルキレンテレフタレートからなるポリエステルであり、
ポリトリメチレンテレフタレート(PTT)やポリブチ
レンテレフタレート、PETが挙げられ、中でもPTT
が好ましく用いられる。また、本発明の効果を損なわな
い範囲であれば、IPA、5−ナトリウムスルホイソフ
タル酸等の芳香族ジカルボン酸成分、アジピン酸、セバ
シン酸等の脂肪族ジカルボン酸成分、1,4−ブタンジ
オール、1.6−ヘキサンジオール、ジエチレングリコ
ール、ポリエチレングリコール等のジオール成分、BA
EO等の芳香族ジオール成分等を共重合したものでもよ
い。さらに安定剤や蛍光剤、顔料、抗菌剤、消臭剤、強
化剤等を含有していてもよい。
In the present invention, the polyester (A) constituting one component of the conjugate fiber is a polyester whose main repeating unit is an alkylene terephthalate,
Examples include polytrimethylene terephthalate (PTT), polybutylene terephthalate, and PET.
Is preferably used. Further, as long as the effects of the present invention are not impaired, IPA, aromatic dicarboxylic acid components such as 5-sodium sulfoisophthalic acid, adipic acid, aliphatic dicarboxylic acid components such as sebacic acid, 1,4-butanediol, 1.6-Diol components such as hexanediol, diethylene glycol and polyethylene glycol, BA
A copolymer of an aromatic diol component such as EO may be used. Further, it may contain a stabilizer, a fluorescent agent, a pigment, an antibacterial agent, a deodorant, a reinforcing agent and the like.

【0010】一方、複合繊維の他方成分を構成するポリ
エステル(B)としては、主たる繰り返し単位がトリメ
チレンテレフタレートからなるポリエステルであること
が必要である。ポリエステル(B)が、一般的に用いら
れている主たる繰り返し単位がエチレンテレフタレート
からなるポリエステルでは、複合繊維のヤング率が大き
いものとなり、これから得られる不織布や紡績糸、織り
編み物が柔軟性に劣るものとなる。また、本発明の効果
を損なわない範囲であれば、ポリエステル(B)はIP
A、5−ナトリウムスルホイソフタル酸等の芳香族ジカ
ルボン酸成分、アジピン酸、セバシン酸等の脂肪族ジカ
ルボン酸成分、1,4−ブタンジオール、1.6−ヘキ
サンジオール、ジエチレングリコール、ポリエチレング
リコール等のジオール成分、BAEO等の芳香族ジオー
ル成分等を共重合したものでもよい。さらに安定剤や蛍
光剤、顔料、抗菌剤、消臭剤、強化剤等を含有していて
もよい。
On the other hand, the polyester (B) constituting the other component of the conjugate fiber must be a polyester whose main repeating unit is trimethylene terephthalate. In the case where the polyester (B) is a polyester in which the main repeating unit generally used is ethylene terephthalate, the Young's modulus of the conjugate fiber is large, and the nonwoven fabric, spun yarn, and woven or knitted fabric obtained therefrom are inferior in flexibility. Becomes Further, as long as the effects of the present invention are not impaired, the polyester (B) may be IP
A, aromatic dicarboxylic acid components such as 5-sodium sulfoisophthalic acid, aliphatic dicarboxylic acid components such as adipic acid and sebacic acid, diols such as 1,4-butanediol, 1.6-hexanediol, diethylene glycol and polyethylene glycol It may be one obtained by copolymerizing a component, an aromatic diol component such as BAEO, or the like. Further, it may contain a stabilizer, a fluorescent agent, a pigment, an antibacterial agent, a deodorant, a reinforcing agent and the like.

【0011】また、ポリエステル(A)とポリエステル
(B)の溶融粘度は、温度280℃、シェアレート10
00s-1で測定したときの値がそれぞれ1500〜30
00dPa・s、400〜1000dPa・sであるこ
とが好ましく、熱処理を施した際に50個/25mm以
上のスパイラル捲縮を発現させるためには、溶融粘度の
差が1000〜2000dPa・sであることが好まし
い。
The melt viscosities of the polyester (A) and the polyester (B) are as follows.
The values measured at 00 s -1 are 1500 to 30 respectively.
00 dPa · s, preferably 400 to 1000 dPa · s. In order to develop a spiral crimp of 50 pieces / 25 mm or more when subjected to heat treatment, the difference in melt viscosity should be 1000 to 2000 dPa · s. Is preferred.

【0012】本発明の複合繊維におけるポリエステル
(A)とポリエステル(B)の複合比率(重量比率)
は、40/60〜60/40が好ましい。この範囲から
外れると、紡糸工程において口金から吐出された時の糸
条曲がりが大きく、紡糸調子の悪化を招いたり、潜在捲
縮の発現性が劣ったものとなるため好ましくない。
The composite ratio (weight ratio) of polyester (A) and polyester (B) in the composite fiber of the present invention.
Is preferably 40/60 to 60/40. Outside of this range, the yarn is greatly bent when discharged from the spinneret in the spinning step, which leads to deterioration in spinning condition and poor latent crimping.

【0013】本発明の複合繊維は、P法による乾熱収縮
率Xpが15〜60%、好ましくは25〜40%である
必要がある。Xpが15%未満では伸縮特性が不足し、
60%を超えると、不織布を熱処理した際に、不織布を
構成する繊維の密度が高くなり、柔軟性に乏しいものと
なる。
The conjugate fiber of the present invention must have a dry heat shrinkage Xp by the P method of 15 to 60%, preferably 25 to 40%. If Xp is less than 15%, the stretching property is insufficient,
If it exceeds 60%, when the non-woven fabric is heat-treated, the density of the fibers constituting the non-woven fabric becomes high, resulting in poor flexibility.

【0014】また、本発明の複合繊維は、Q法による乾
熱収縮率Xqが15%以下、好ましくは10%以下であ
る必要がある。Xqが15%を超えると繊維が硬化し、
この複合繊維から得られる不織布や織り編み物の風合い
が硬くなる。
Further, the composite fiber of the present invention must have a dry heat shrinkage Xq by the Q method of 15% or less, preferably 10% or less. When Xq exceeds 15%, the fiber hardens,
The texture of the nonwoven fabric or woven knit obtained from the composite fiber becomes hard.

【0015】ここで、P法とQ法の乾熱収縮率の意義に
ついて説明する。潜在捲縮を発現させた繊維は収縮する
力が強く、P法における荷重(0.44mN/dte
x)では伸びきらないので、P法の乾熱収縮率が高いと
いうことは、スパイラル捲縮の発現による繊維の収縮力
が強いことを示すものである。また、潜在捲縮を発現さ
せた繊維は、Q法における荷重(2.65mN/dte
x)で伸びきるので、Q法の乾熱収縮率が高いというこ
とは、繊維の実収縮率が高いことを示すものである。
Here, the significance of the dry heat shrinkage rate of the P method and the Q method will be described. The fiber that has developed the latent crimp has a strong contracting force, and the load (0.44 mN / dte) in the P method.
Since it cannot be fully stretched in x), the high dry heat shrinkage of the P method indicates that the fiber has a strong shrinkage due to the development of spiral crimp. In addition, the fiber in which the latent crimp was developed has a load (2.65 mN / dte) in the Q method.
Since it can be stretched in x), the high dry heat shrinkage of the Q method indicates that the actual shrinkage of the fiber is high.

【0016】P法による乾熱収縮率Xpは、延伸工程で
の延伸倍率や延伸後の緊張熱処理温度で調整することが
できる。Xpを高くする場合は、延伸倍率を大きくす
る、あるいは緊張熱処理温度を低くする等の操作を行え
ばよく、逆にXpを低くする場合は、延伸倍率を小さく
する、あるいは緊張熱処理温度を高くする等の操作を行
えばよい。
The dry heat shrinkage Xp by the P method can be adjusted by the stretching ratio in the stretching step and the temperature of the strain heat treatment after the stretching. When increasing Xp, an operation such as increasing the stretching ratio or lowering the strain heat treatment temperature may be performed. Conversely, when decreasing Xp, decreasing the stretch ratio or increasing the strain heat treatment temperature. And the like.

【0017】また、Q法による乾熱収縮率Xqは、延伸
工程での弛緩熱処理温度で調整することができる。Xq
を高くする場合は弛緩熱処理温度を高くすればよく、逆
にXqを低くする場合は弛緩熱処理温度を低くすればよ
い。
The dry heat shrinkage Xq by the Q method can be adjusted by the relaxation heat treatment temperature in the stretching step. Xq
Is increased, the relaxation heat treatment temperature may be increased. Conversely, when Xq is decreased, the relaxation heat treatment temperature may be decreased.

【0018】さらに、本発明の複合繊維は、170℃に
おける自由収縮熱処理で50個/25mm以上のスパイ
ラル捲縮を発現する潜在捲縮性能を有していることが必
要である。自由収縮熱処理で発現する捲縮数が50個/
25mm未満では、得られる不織布や織り編み物が伸縮
性に劣るものとなる。
Further, the conjugate fiber of the present invention must have a latent crimping property of exhibiting a spiral crimp of 50 pieces / 25 mm or more by a free shrinkage heat treatment at 170 ° C. The number of crimps generated by free shrinkage heat treatment is 50 /
If it is less than 25 mm, the obtained nonwoven fabric or woven knit will have poor elasticity.

【0019】本発明の複合繊維は、ポリエステル(A)
と、ポリエステル(B)とが偏心的に接合した複合繊維
であるが、偏心的に接合というのは偏心芯鞘型あるいは
サイドバイサイド型を示すものであり、2成分が偏った
接合形態であればその形態は特に限定されるものではな
い。また、複合繊維の断面形状は円形、扁平、六葉、三
角、W型、H型等の異型、あるいは中空断面であっても
よい。
The conjugate fiber of the present invention is a polyester (A)
And polyester (B) are eccentrically bonded composite fibers, and eccentrically bonded means an eccentric core-sheath type or a side-by-side type. The form is not particularly limited. The cross-sectional shape of the conjugate fiber may be a circular, flat, six-lobe, triangular, W-shaped, H-shaped or other irregular shape, or a hollow cross-section.

【0020】さらに、本発明の複合繊維を紡績糸や不織
布を得るために短繊維として用いる場合、紡績工程やカ
ード工程における通過性をよくするために、8〜18個
/25mmの機械捲縮を付与することが好ましい。機械
捲縮を付与する方法は特に限定されるものではなく、押
し込み式捲縮付与装置を用いる方法等が採用される。
Further, when the conjugate fiber of the present invention is used as a short fiber to obtain a spun yarn or a nonwoven fabric, a mechanical crimp of 8 to 18 pieces / 25 mm is used in order to improve the passing property in the spinning process and the carding process. It is preferable to provide. The method for applying the mechanical crimp is not particularly limited, and a method using a press-type crimp applying device or the like is employed.

【0021】次に、本発明の不織布について説明する。
本発明の不織布は上記複合繊維を60%以上含むことが
必要であり、上記複合繊維100%で不織布を構成する
のが好ましい。複合繊維が60%未満では優れた伸縮性
を有する不織布が得られない。本発明の複合繊維と混合
する繊維としては、通常用いられているPET短繊維や
PTT短繊維が挙げられ、また、不織布の形態保持性を
向上させる目的で、低融点ポリエステルを接着成分とし
た熱接着性複合繊維を使用することもできる。
Next, the nonwoven fabric of the present invention will be described.
It is necessary that the nonwoven fabric of the present invention contains at least 60% of the above-mentioned composite fiber, and it is preferable that the nonwoven fabric is composed of 100% of the above-mentioned composite fiber. If the composite fiber content is less than 60%, a nonwoven fabric having excellent elasticity cannot be obtained. Examples of the fiber to be mixed with the conjugate fiber of the present invention include PET staple fibers and PTT staple fibers which are commonly used. In addition, in order to improve the shape retention of the nonwoven fabric, a heat-resistant polyester having a low melting point as an adhesive component is used. Adhesive bicomponent fibers can also be used.

【0022】さらに、本発明の不織布は、20%伸長時
の伸長回復率が70%以上であることが必要である。2
0%伸長時の伸長回復率が70%未満では、伸長後に元
の大きさに戻りにくいため、貼布剤等に使用した場合に
伸縮性や肌への密着性が劣るものとなる。また、不織布
の剛軟度は60cN以下であることが必要である。剛軟
度が60cNを超えると、不織布は柔軟性に劣るものと
なり、本発明の目的とするものが得られない。
Further, the nonwoven fabric of the present invention needs to have an elongation recovery rate of 70% or more at 20% elongation. 2
If the elongation recovery rate at 0% elongation is less than 70%, it is difficult to return to the original size after elongation, so that when used in a patch or the like, the elasticity and adhesion to the skin are poor. Further, the softness of the nonwoven fabric needs to be 60 cN or less. When the bending resistance exceeds 60 cN, the nonwoven fabric becomes inferior in flexibility, and the object of the present invention cannot be obtained.

【0023】本発明の不織布は、例えば次のようにして
得ることができる。まず、本発明のポリエステル系複合
繊維をカード機にて開繊しウエブとした後、ニードルパ
ンチ処理によって複合繊維同士を交絡させる。その後、
複合繊維の潜在捲縮が発現しうる温度で熱処理を施すこ
とによって得ることができる。
The nonwoven fabric of the present invention can be obtained, for example, as follows. First, the polyester-based composite fiber of the present invention is opened by a carding machine to form a web, and then the composite fiber is entangled by needle punching. afterwards,
It can be obtained by performing a heat treatment at a temperature at which latent crimp of the conjugate fiber can be developed.

【0024】[0024]

【作用】本発明の複合繊維は、潜在捲縮性ポリエステル
系複合繊維の一方成分(B)を主たる繰り返し単位がト
リメチレンテレフタレートからなるポリエステルとする
ことによって、複合繊維の剛性(ヤング率)がPETの
場合よりも小さく、柔軟性に優れたものとなり、さら
に、この複合繊維から得られる不織布や織り編み物も柔
軟性に優れたものとなる。また、熱収縮特性を特定の範
囲とすることで、得られる不織布や織り編み物は、伸縮
性能も合わせ持つものとなる。
The conjugate fiber of the present invention has a rigidity (Young's modulus) of PET by making one component (B) of the latently crimpable polyester-based composite fiber a polyester whose main repeating unit is trimethylene terephthalate. And the nonwoven fabric or woven knit obtained from this composite fiber also has excellent flexibility. In addition, by setting the heat shrinkage property in a specific range, the obtained nonwoven fabric or woven knitted fabric also has elasticity.

【0025】[0025]

【実施例】次に、本発明を実施例により具体的に説明す
るが、本発明はこれらに限定されるものではない。な
お、実施例に記述した特性値と諸物性の測定法、評価法
は次の通りである。 (1)乾熱収縮率(P法、Q法) 前述の方法で測定を行った。 (2)潜在捲縮発現数 得られた短繊維を自由に収縮しうる状態で170℃×1
5分の熱処理を施した後、JIS L−1015 7−
21−1に規定する方法で捲縮数の測定を行った。 (3)伸長回復率 得られた短繊維を、カード機を用いて目付が120g/
2 のカードウエブとし、次いでニードルパンチ処理を
施して繊維同士を交絡させ、不織布を得た。この不織布
に170℃×15分の熱処理を施した後、縦(繊維の配
向方向)150mm、横(繊維の配向方向に対して垂直
方向)25mmの試料を作成する。これを縦方向に10
0m/分の速度で伸度20%まで伸長する。1分間この
状態を保持した後、100m/分の速度で元に戻し、3
分間放置する。再び100m/分の速度で伸長し、荷重
がかかるまでの伸びIを測定する。これらの測定値と下
記式より伸長回復率を求めた。伸長回復率が70%以上
を合格とした。 伸長回復率(%)=〔(20−I)/20〕×100 (4)剛軟度(不織布の柔軟性) JIS L−1096の試料幅100mm、試料長10
0mmの試料片を3枚準備し、DAIEI KEIKI
製風合メーター(MODEL FM−2)を使用した。
15mm幅のスリット上に試料片を置いて、ア−ムが試
料をスリット間に押し込む時に、最高何cNの力が必要
かを試料の表裏について、縦横方向、4個所で測定し、
その合計値を求めた。試料片3枚の平均値を不織布の剛
軟度として表し、剛軟度が60cN以下を合格とした。
EXAMPLES Next, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples. The methods for measuring and evaluating the characteristic values and various physical properties described in the examples are as follows. (1) Dry heat shrinkage (P method, Q method) Measurement was performed by the method described above. (2) Latent crimping number 170 ° C. × 1 in a state where the obtained short fibers can be freely shrunk.
After heat treatment for 5 minutes, JIS L-1015 7-
The number of crimps was measured by the method specified in 21-1. (3) Elongation recovery rate The obtained short fiber was weighed at 120 g /
A card web of m 2 was obtained and then subjected to a needle punch treatment to entangle the fibers to obtain a nonwoven fabric. After subjecting this nonwoven fabric to a heat treatment at 170 ° C. for 15 minutes, a sample having a length of 150 mm (direction of orientation of the fiber) and a width of 25 mm (perpendicular to the direction of orientation of the fiber) is prepared. This is 10
It is stretched at a speed of 0 m / min to an elongation of 20%. After maintaining this state for 1 minute, return to the original state at a speed of 100 m / min.
Leave for a minute. It is stretched again at a speed of 100 m / min, and the stretch I until a load is applied is measured. The elongation recovery rate was determined from these measured values and the following equation. The elongation recovery rate was 70% or more. Elongation recovery rate (%) = [(20-I) / 20] × 100 (4) Bending degree (flexibility of nonwoven fabric) JIS L-1096 sample width 100 mm, sample length 10
Three 0 mm sample pieces were prepared, and DAIEI KEIKI
A hand feeling meter (MODEL FM-2) was used.
A sample piece is placed on a slit having a width of 15 mm, and when the arm pushes the sample between the slits, the maximum cN force required at the front and back of the sample is measured at four positions in the vertical and horizontal directions,
The sum was determined. The average value of three sample pieces was expressed as the softness of the nonwoven fabric, and a softness of 60 cN or less was regarded as acceptable.

【0026】実施例1 ポリエステル(A)として溶融粘度1500dPa・s
のPTT、ポリエステル(B)として溶融粘度800d
Pa・sのPTTを用いた。この2種類のチップを常法
により減圧乾燥させた後、通常の複合溶融紡糸装置を使
用し、直径0.45mm、丸断面の344個の細孔を有
する紡糸口金を用いて、紡糸温度280℃、吐出量23
0g/分で2種類の成分をサイドバイサイド型(重量比
1:1)に複合紡糸し、紡糸糸条を空気で冷却した後、
1000m/分の速度で引き取り、未延伸糸を採取し
た。
Example 1 Melt viscosity of 1500 dPa · s as polyester (A)
PTT, melt viscosity 800d as polyester (B)
Pa · s PTT was used. After drying these two kinds of chips under reduced pressure by a conventional method, a spinning temperature of 280 ° C. was obtained by using a spinneret having a diameter of 0.45 mm and 344 pores having a round cross section using a conventional composite melt spinning apparatus. , Discharge amount 23
At 0 g / min, the two kinds of components were composite-spun into a side-by-side type (weight ratio: 1: 1), and the spun yarn was cooled with air.
An undrawn yarn was collected at a speed of 1000 m / min.

【0027】得られた糸条を11万dtexに集束し、
温度70℃、延伸倍率3.72倍で延伸した。次いで、
温度150℃で緊張熱処理を施し、押し込み式捲縮付与
装置で12個/25mmの機械捲縮を付与した後、51
mmに切断して、繊度2dtex、Xp42%、Xq1
1%の複合短繊維を得た。得られた複合短繊維を、カー
ド機を用いて目付120g/m2 のカードウエブとし、
ニードルパンチ処理を施して繊維同士を交絡させた後、
170℃×1分の熱処理を施して不織布を得た。
The obtained yarn is bundled to 110,000 dtex,
The film was stretched at a temperature of 70 ° C. and a draw ratio of 3.72 times. Then
Tensile heat treatment is performed at a temperature of 150 ° C., and a mechanical crimp of 12 pieces / 25 mm is applied by a press-in type crimp applying apparatus.
mm, fineness 2dtex, Xp42%, Xq1
1% of composite staple fiber was obtained. Using a carding machine, the obtained conjugate short fiber was made into a card web having a basis weight of 120 g / m 2 ,
After performing the needle punching process and entangled the fibers,
Heat treatment was performed at 170 ° C. for 1 minute to obtain a nonwoven fabric.

【0028】実施例2 ポリエステル(A)として溶融粘度1000dPa・s
のPTT、ポリエステル(B)として溶融粘度400d
Pa・sのPTTを用いた以外は、実施例1と同様にし
て複合短繊維と不織布を得た。
Example 2 Polyester (A) having a melt viscosity of 1000 dPa · s
PTT, melt viscosity 400d as polyester (B)
Except for using Pa · s PTT, a conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1.

【0029】実施例3 ポリエステル(A)として溶融粘度1800dPa・s
のPET、ポリエステル(B)として溶融粘度1200
dPa・sのPTTを用いた以外は、実施例1と同様に
して複合短繊維と不織布を得た。
Example 3 Melt viscosity of 1800 dPa · s as polyester (A)
Of PET, polyester (B) with a melt viscosity of 1200
A conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that the PTT of dPa · s was used.

【0030】実施例4 複合短繊維の延伸工程において、緊張熱処理温度を変更
することによってXpを54%に変更した以外は、実施
例1と同様にして複合短繊維と不織布を得た。
Example 4 A composite staple fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that in the stretching step of the conjugate staple fiber, Xp was changed to 54% by changing the tension heat treatment temperature.

【0031】実施例5 複合短繊維の延伸工程において、緊張熱処理温度を変更
することによってXpを24%に変更した以外は、実施
例1と同様にして複合短繊維と不織布を得た。
Example 5 A composite staple fiber and a nonwoven fabric were obtained in the same manner as in Example 1, except that Xp was changed to 24% by changing the tension heat treatment temperature in the stretching step of the conjugate staple fiber.

【0032】実施例6 繊度2dtex、繊維長51mm、丸断面のPTT短繊
維と、実施例1で得られた複合短繊維を30:70の混
率で不織布を作成した以外は、実施例1と同様にして不
織布を得た。
Example 6 The same procedure as in Example 1 was carried out except that the PTT short fiber having a fineness of 2 dtex, a fiber length of 51 mm and a round cross section and the composite short fiber obtained in Example 1 were mixed at a mixing ratio of 30:70 to form a nonwoven fabric. To obtain a nonwoven fabric.

【0033】比較例1 ポリエステル(A)として溶融粘度1800dPa・s
のPET、ポリエステル(B)として溶融粘度1200
dPa・sのPETを用いた以外は、実施例1と同様に
して複合短繊維と不織布を得た。
Comparative Example 1 Melt viscosity of 1800 dPa · s as polyester (A)
Of PET, polyester (B) with a melt viscosity of 1200
Except for using dPa · s PET, a composite short fiber and a nonwoven fabric were obtained in the same manner as in Example 1.

【0034】比較例2 複合短繊維の延伸工程において、緊張熱処理温度を変更
することによってXpを12%に変更した以外は、実施
例1と同様にして複合短繊維と不織布を得た。
Comparative Example 2 A composite staple fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that in the drawing step of the conjugate staple fiber, Xp was changed to 12% by changing the tension heat treatment temperature.

【0035】比較例3 複合短繊維の延伸工程において、緊張熱処理温度と弛緩
熱処理温度を変更することによってXpを74%、Xq
を31%に変更した以外は、実施例1と同様にして複合
短繊維と不織布を得た。
Comparative Example 3 In the drawing step of the conjugate short fiber, Xp was 74% and Xq was changed by changing the tension heat treatment temperature and the relaxation heat treatment temperature.
Was changed to 31%, and a composite short fiber and a nonwoven fabric were obtained in the same manner as in Example 1.

【0036】比較例4 繊度2dtex、繊維長51mm、丸断面のPTT短繊
維と、実施例1で得られた複合短繊維を55:45の混
率で不織布を作成した以外は、実施例6と同様にして不
織布を得た。実施例1〜6と比較例1〜で得られた複合
短繊維と不織布の諸物性を表1に示す。
Comparative Example 4 The same procedure as in Example 6 was carried out except that a PTT short fiber having a fineness of 2 dtex, a fiber length of 51 mm and a round cross section and the composite short fiber obtained in Example 1 were mixed at a mixing ratio of 55:45 to form a nonwoven fabric. To obtain a nonwoven fabric. Table 1 shows various physical properties of the conjugate short fibers and the nonwoven fabric obtained in Examples 1 to 6 and Comparative Examples 1 to.

【0037】[0037]

【表1】 [Table 1]

【0038】表1から明らかなように、実施例1〜6で
得られたポリエステル系複合繊維は、ポリマーや熱収縮
率が本発明の範囲内であるため、この複合繊維から得ら
れた不織布は伸縮性や柔軟性に優れたものであった。
As is apparent from Table 1, the polyester composite fibers obtained in Examples 1 to 6 have a polymer and a heat shrinkage within the range of the present invention. It was excellent in elasticity and flexibility.

【0039】一方、比較例1は、ポリエステル(A)と
(B)が共にPETであるため、繊維のヤング率が大き
く、これから得られた不織布は柔軟性に乏しいものであ
った。比較例2は、複合繊維の熱収縮率Xpが小さいた
めに、潜在捲縮の発現性に劣り、また、これから得られ
た不織布は伸縮性や柔軟性に劣るものであった。次に、
比較例3は、複合繊維の熱収縮率Xp、Xqが共に大き
いために、潜在捲縮の発現性は良好なものの、熱処理後
の不織布が柔軟性に乏しいものとなった。さらに、比較
例4は、複合繊維の混率が低いために、伸縮性の劣る不
織布であった。
On the other hand, in Comparative Example 1, since both the polyesters (A) and (B) were PET, the Young's modulus of the fibers was large, and the nonwoven fabric obtained therefrom was poor in flexibility. In Comparative Example 2, since the heat shrinkage Xp of the conjugate fiber was small, the expression of latent crimp was inferior, and the nonwoven fabric obtained therefrom was inferior in elasticity and flexibility. next,
In Comparative Example 3, since both the heat shrinkage factors Xp and Xq of the conjugate fiber were large, the expression of latent crimp was good, but the nonwoven fabric after heat treatment was poor in flexibility. Further, Comparative Example 4 was a nonwoven fabric having poor elasticity due to a low mixing ratio of the conjugate fiber.

【0040】[0040]

【発明の効果】本発明のポリエステル系複合繊維は上記
の構成を有するので、十分な伸縮性を有し、かつ、優れ
た柔軟性を有する不織布や織り編み物用の紡績糸を得る
ことができるものであり、また、上記の複合繊維を60
%以上含有する本発明の不織布は、優れた伸縮性と柔軟
性を有し、例えば貼布剤等に使用した場合に肌への密着
性が良好なものである。
Since the polyester composite fiber of the present invention has the above-mentioned constitution, it is possible to obtain a spun yarn for a nonwoven fabric or a woven or knitted fabric having sufficient elasticity and excellent flexibility. And the above-mentioned composite fiber is 60
% Of the nonwoven fabric of the present invention has excellent stretchability and flexibility, and has good adhesion to the skin when used in, for example, a patch.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 主たる繰り返し単位がアルキレンテレフ
タレートからなるポリエステル(A)と、主たる繰り返
し単位がトリメチレンテレフタレートからなるポリエス
テル(B)とが偏心的に接合した複合繊維であって、熱
収縮特性が下記式(1)〜(2)を満足し、かつ170
℃の自由収縮熱処理で50個/25mm以上のスパイラ
ル捲縮を発現することを特徴とするポリエステル系複合
繊維。 15≦Xp≦60 (1) Xq≦15 (2) ただし、Xpは下記P法で、Xqは下記Q法で測定した
乾熱収縮率を示す。P法:繊維に初荷重0.44mN/
dtexをかけて糸長L0 を測定し、次いで荷重を外し
て170℃×15分の熱処理を施した後、0.44mN
/dtexの荷重をかけて糸長L1 を測定し、次式にて
算出する。 Xp(%)=〔(L0 −L1 )/L0 〕×100 Q法:繊維に初荷重1.32mN/dtexをかけて糸
長L2 を測定し、次いで荷重を外して170℃×15分
の熱処理を施した後、2.65mN/dtexの荷重を
かけて糸長L3 を測定し、次式にて算出する。 Xq(%)={(L2 −L3 )/L2 }×100
1. A conjugate fiber in which a polyester (A) whose main repeating unit is made of alkylene terephthalate and a polyester (B) whose main repeating unit is made of trimethylene terephthalate are eccentrically bonded, and have the following heat shrinkage characteristics. Equations (1) and (2) are satisfied and 170
A polyester-based conjugate fiber that exhibits a spiral crimp of 50 pieces / 25 mm or more by a free shrinkage heat treatment at a temperature of ° C. 15 ≦ Xp ≦ 60 (1) Xq ≦ 15 (2) Here, Xp represents the dry heat shrinkage measured by the following P method, and Xq represents the following Q method. P method: Initial load 0.44mN /
After applying dtex to measure the yarn length L 0 , then removing the load and performing a heat treatment at 170 ° C. for 15 minutes, 0.44 mN
/ Under a load of dtex measure the yarn length L 1, it is calculated by the following equation. Xp (%) = [(L 0 −L 1 ) / L 0 ] × 100 Q method: An initial load of 1.32 mN / dtex is applied to the fiber to measure the yarn length L 2 , and then the load is removed and 170 ° C. × after heat treatment of 15 minutes, to measure the yarn length L 3 under a load of 2.65mN / dtex, it is calculated by the following equation. Xq (%) = {(L 2 −L 3 ) / L 2 } × 100
【請求項2】 請求項1記載のポリエステル系複合繊維
を60%以上含み、20%伸長時の伸長回復率が70%
以上、剛軟度が60cN以下であることを特徴とする不
織布。
2. The polyester-based composite fiber according to claim 1, containing at least 60%, and having an elongation recovery rate of 70% at 20% elongation.
As described above, the nonwoven fabric has a softness of 60 cN or less.
JP23397399A 1999-08-20 1999-08-20 Polyester-based conjugate fiber and nonwoven fabric Granted JP2001064828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23397399A JP2001064828A (en) 1999-08-20 1999-08-20 Polyester-based conjugate fiber and nonwoven fabric

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23397399A JP2001064828A (en) 1999-08-20 1999-08-20 Polyester-based conjugate fiber and nonwoven fabric

Publications (1)

Publication Number Publication Date
JP2001064828A true JP2001064828A (en) 2001-03-13

Family

ID=16963551

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2001064828A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327336A (en) * 2001-04-25 2002-11-15 Unitika Ltd Thermobonding conjugate short fiber and nonwoven fabric having the same short fiber
WO2003100145A1 (en) * 2002-05-27 2003-12-04 Asahi Kasei Fibers Corporation Composite fiber and process for producing the same
JP2005520059A (en) * 2001-12-21 2005-07-07 インビスタ・テクノロジーズ・エス・エイ・アール・エル Method for producing high bulk composite sheet
US7147815B2 (en) 2002-12-23 2006-12-12 E. I. Du Pont De Nemours And Company Poly(trimethylene terephthalate) bicomponent fiber process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327336A (en) * 2001-04-25 2002-11-15 Unitika Ltd Thermobonding conjugate short fiber and nonwoven fabric having the same short fiber
JP2005520059A (en) * 2001-12-21 2005-07-07 インビスタ・テクノロジーズ・エス・エイ・アール・エル Method for producing high bulk composite sheet
WO2003100145A1 (en) * 2002-05-27 2003-12-04 Asahi Kasei Fibers Corporation Composite fiber and process for producing the same
US6846560B2 (en) 2002-05-27 2005-01-25 Asahi Kasei Kabushiki Kaisha Conjugate fiber and method of producing same
CN1307331C (en) * 2002-05-27 2007-03-28 旭化成纤维株式会社 Composite fiber and process for producing the same
US7147815B2 (en) 2002-12-23 2006-12-12 E. I. Du Pont De Nemours And Company Poly(trimethylene terephthalate) bicomponent fiber process

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