JPH06272114A - Production of fiber assembly - Google Patents

Production of fiber assembly

Info

Publication number
JPH06272114A
JPH06272114A JP5061908A JP6190893A JPH06272114A JP H06272114 A JPH06272114 A JP H06272114A JP 5061908 A JP5061908 A JP 5061908A JP 6190893 A JP6190893 A JP 6190893A JP H06272114 A JPH06272114 A JP H06272114A
Authority
JP
Japan
Prior art keywords
fiber
polyamide
polyester
alpha
fiber assembly
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
JP5061908A
Other languages
Japanese (ja)
Inventor
Hideaki Kitawaki
秀亮 北脇
Toshimasa Kuroda
俊正 黒田
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 JP5061908A priority Critical patent/JPH06272114A/en
Publication of JPH06272114A publication Critical patent/JPH06272114A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide a method for producing a fiber assembly, substantially composed of polyamide fiber, capable of stably producing conjugate spun fiber composed of a polyamide and a polyester for a long period and having a sufficient strength even after forming the conjugate fiber into the fiber assembly and dissolving and removing the polyester. CONSTITUTION:Conjugate spun fiber is formed into a fiber assembly and either of the components is then dissolved and removed to produce the fiber assembly substantially composed of a polyamide. In the process, the content (alpha) of the polyamide in the conjugate fiber is regulated to 30-55wt.% and the polyamide and a polyester having the melt viscosity at the spinning temperature of the conjugate fiber and 100sec<-1> shearing rate satisfying the following formula (1) or (2) are used: (1) 2000<=MVT and MVN/MVT>=0.18 when alpha is 30<=alpha<40 and (2) 2000<=MVN and MVN/MVT>=0.1Xalpha-3.82 when alpha is 40<=alpha<=55 (a is the content [wt.%] of the polyamide in the conjugate fiber; MVN and MVT are respectively melt viscosities [P] of the polyamide and polyester}.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、繊維集合体の製造方法
に関し、さらに詳しくはポリアミドとポリエステルから
なる混合紡糸繊維を繊維集合体となした後ポリエステル
成分を溶解除去し、実質的にポリアミド繊維からなる繊
維集合体を製造する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber assembly, and more specifically, a mixed spun fiber made of polyamide and polyester is made into a fiber assembly, and then the polyester component is dissolved and removed to obtain substantially polyamide fiber. The present invention relates to a method for producing a fiber assembly comprising

【0002】[0002]

【従来の技術】非相溶性の2種以上のポリマーから複合
紡糸繊維を形成し、その後少なくとも1種のポリマーを
除去することにより、極細繊維あるいは網目状繊維を得
る方法はよく知られている(例えば、特公昭44-21167号
公報など)。しかしながら、該方法をポリアミドとポリ
エステルからなる複合繊維に適用する場合には、溶融紡
糸時の安定性が悪く、長時間安定して紡糸できないばか
りでなく、得られた極細繊維の強度が低いという問題を
有していた。
2. Description of the Related Art It is well known that ultrafine fibers or reticulated fibers can be obtained by forming a composite spun fiber from two or more incompatible polymers and then removing at least one polymer. For example, Japanese Patent Publication No. 44-21167). However, when the method is applied to a composite fiber composed of polyamide and polyester, the stability during melt spinning is poor, spinning is not possible for a long time, and the strength of the obtained ultrafine fiber is low. Had.

【0003】このような問題を解決するため、相互配列
型複合繊維からポリアミド極細繊維を製造する方法も検
討されているが、該方法では設備が複雑となり、コスト
の高いものになってしまうという欠点がある。
In order to solve such a problem, a method for producing a polyamide ultrafine fiber from the inter-alignment type conjugate fiber has been studied, but the method requires complicated equipment and high cost. There is.

【0004】[0004]

【発明が解決しようとする課題】本発明の目的は、上記
従来技術の有する問題点を解消し、ポリアミドとポリエ
ステルからなる複合紡糸繊維を長時間安定して製造し、
しかも該複合繊維を繊維集合体となして複合繊維中のポ
リエステルを溶解除去した後も十分な強度を有する、実
質的にポリアミド繊維からなる繊維集合体を製造する方
法を提供することにある。
SUMMARY OF THE INVENTION The object of the present invention is to solve the above problems of the prior art, to stably produce a composite spun fiber composed of polyamide and polyester for a long time,
Moreover, it is an object of the present invention to provide a method for producing a fiber assembly consisting essentially of polyamide fibers, which has sufficient strength even after the polyester in the composite fiber is dissolved and removed by forming the composite fiber into a fiber assembly.

【0005】[0005]

【課題を解決するための手段】本発明者らは上記目的を
達成するために鋭意検討した結果、複合紡糸繊維を構成
するポリアミドとポリエステルに、ある特定の溶融粘度
を有するものを使用することにより、上記目的が達成で
きることを究明した。
Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, by using a polyamide and a polyester constituting a composite spun fiber, which have a certain melt viscosity, , It was clarified that the above object can be achieved.

【0006】かくして、本発明によれば、ポリアミドと
ポリエステルからなる複合紡糸繊維を繊維集合体となし
た後ポリエステル成分を溶解除去し、実質的にポリアミ
ド繊維からなる繊維集合体を製造するに際し、該複合繊
維中のポリアミドの含有率αを30〜55重量%となし、且
つ該複合繊維の紡糸温度で且つ剪断速度100sec-1下にお
ける溶融粘度が下記 (1) または (2) 式の関係を満足
するポリアミドおよびポリエステルを用いることを特徴
とする繊維集合体の製造方法が提供される。 (1)30 ≦α<40のとき、2000≦MVT 且つMVN /M
T ≧0.18 (2)40 ≦α≦55のとき、2000≦MVT 且つMVN /M
T ≧0.1 ×α−3.82 (ここで、αは複合繊維中のポリアミドの含有率〔重量
%〕、MVN およびMN T は、それぞれポリアミドおよ
びポリエステルの溶融粘度〔ポイズ〕を表わす)
Thus, according to the invention, a polyamide
No composite fiber made of polyester is used
After the polyester component is dissolved and removed, the
When manufacturing a fiber assembly composed of
The content α of polyamide in the fiber is set to 30 to 55% by weight, and
At the spinning temperature of the composite fiber and the shear rate of 100 sec-1Below
Melt viscosity satisfies the relation of the following formula (1) or (2)
Characterized by using polyamide and polyester
A method for manufacturing a fiber assembly is provided. (1) When 30 ≤ α <40, 2000 ≤ MVTAnd MVN/ M
VT≧ 0.18 (2) When 40 ≦ α ≦ 55, 2000 ≦ MVTAnd MVN/ M
VT≧ 0.1 × α−3.82 (where α is the polyamide content in the composite fiber [weight
%], MVNAnd MN TAre polyamide and
And represents the melt viscosity (poise) of polyester)

【0007】以下、本発明を詳細に説明する。本発明で
用いるポリアミドとしては、ナイロン6 、ナイロン66、
ナイロン610 、ナイロン46、ナイロン12およびその変性
体などが挙げられ、これらのうちの1種あるいは2種以
上を選ぶことができる。
The present invention will be described in detail below. As the polyamide used in the present invention, nylon 6, nylon 66,
Examples thereof include nylon 610, nylon 46, nylon 12 and modified products thereof, and one or more of these can be selected.

【0008】また、ポリエステルとしては、テレフタル
酸を主たる酸成分とし、炭素数2〜6のアルキレングリ
コール、即ち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
コールおよびヘキサメチレングリコールから選ばれた少
なくとも1種のグリコールを主たるグリコール成分とす
るポリエステルあるいはこれらを変性したポリエステル
類が挙げられる。
As the polyester, terephthalic acid is used as a main acid component, and at least one selected from alkylene glycols having 2 to 6 carbon atoms, that is, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol and hexamethylene glycol. Examples include polyesters containing one type of glycol as a main glycol component or polyesters modified with these.

【0009】本発明に用いる複合繊維中のポリアミドの
含有率αは30〜55重量%であることが必要である。ポリ
アミドの含有率αが30%未満の場合には得られる繊維集
合体の強度が著しく低くなる。一方、含有率αが55%を
越える場合には、繊度の小さい繊維が得られなくなる。
The content α of polyamide in the composite fiber used in the present invention must be 30 to 55% by weight. If the content α of polyamide is less than 30%, the strength of the fiber assembly obtained will be extremely low. On the other hand, if the content α exceeds 55%, fibers having a small fineness cannot be obtained.

【0010】本発明で使用するポリエステルの、紡糸温
度下、剪断速度100sec-1下における溶融粘度MVT は、
2000ポイズ以上必要である。2000ポイズ未満では曳糸性
が悪く、繊度斑の大きいものしか得られないが、あまり
高すぎても紡糸が困難となるので5000ポイズ以下程度に
留めることが好ましい。
The melt viscosity MV T of the polyester used in the present invention at a spinning temperature and a shear rate of 100 sec -1 is
2000 poise or more is required. If it is less than 2000 poise, the spinnability is poor and only those with large fineness unevenness can be obtained, but if it is too high, spinning becomes difficult, so it is preferable to keep it at about 5000 poise or less.

【0011】さらに、ポリアミドとポリエステルの溶融
粘度比(MVN /MVT )は下記式を満足する必要があ
る。 30≦α<40のとき MVN /MVT ≧0.18 40≦α≦55のとき MVN /MVT ≧0.1 ×α−3.82 MVN /MVT が上記の値より小さい場合には、ポリア
ミド極細繊維を得るのに好適な海島構造が形成されな
い。
Further, the melt viscosity ratio (MV N / MV T ) of polyamide and polyester must satisfy the following formula. When 30 ≦ α <40 MV N / MV T ≧ 0.18 When 40 ≦ α ≦ 55 MV N / MV T ≧ 0.1 × α−3.82 When MV N / MV T is smaller than the above value, polyamide ultrafine fiber The sea-island structure suitable for obtaining

【0012】本発明で用いる複合繊維を製造するに際し
ては、上記ポリアミドとポリエステルを予めチップブレ
ンドした後、通常の溶融紡糸装置に供給する方法、溶融
紡糸装置に別々のフィーダーから供給し、ルーダー中で
混合する方法などが採用でき、混合に際しては、必要に
応じて任意の添加剤、例えば帯電防止剤、顔料、熱安定
剤、難燃剤、艶消剤等を添加することもできる。
In the production of the conjugate fiber used in the present invention, the above polyamide and polyester are preliminarily chip-blended and then fed to an ordinary melt spinning device, or the melt spinning device is fed from a separate feeder and placed in a ruder. A method of mixing can be adopted, and at the time of mixing, optional additives such as an antistatic agent, a pigment, a heat stabilizer, a flame retardant, and a matting agent can be added as necessary.

【0013】通常の紡糸・延伸を行なって巻き取られた
複合繊維糸条は次いで織編物、不織布などの繊維集合体
に成形された後、アルカリ水溶液でポリエステル成分を
除去される。
The composite fiber yarn wound by the usual spinning and drawing is then formed into a fiber aggregate such as a woven or knitted fabric or a nonwoven fabric, and then the polyester component is removed with an alkaline aqueous solution.

【0014】ここで、使用するアルカリ水溶液は、水酸
化ナトリウム、水酸化カリウム、テトラメチルアンモニ
ウムハイドロオキサイド、炭酸ナトリウム、炭酸カリウ
ム等の水溶液を挙げることができ、中でも水酸化ナトリ
ウム、水酸化カリウムが特に好ましく使用できる。ま
た、アルカリ水溶液の濃度および温度は、使用するアル
カリ化合物の種類により異なるが、 0.1〜30重量%、50
〜100 ℃の範囲が好ましい。
Examples of the alkaline aqueous solution used here include aqueous solutions of sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, sodium carbonate, potassium carbonate and the like. Among them, sodium hydroxide and potassium hydroxide are particularly preferable. It can be preferably used. The concentration and temperature of the alkaline aqueous solution vary depending on the kind of the alkaline compound used, but 0.1 to 30% by weight, 50%
The range of -100 ° C is preferred.

【0015】得られた繊維集合体は、該集合体を構成す
るポリアミド極細繊維の太さが 0.001〜0.1 デニールの
範囲にあり、所々で融着した網目状繊維束や多数の筋状
溝を有する繊維からなり、独特の風合と優れた力学的特
性を有している。
The obtained fiber assembly has polyamide ultrafine fibers having a thickness in the range of 0.001 to 0.1 denier and has fused fiber bundles and numerous streak-like grooves in some places. It is made of fibers and has a unique texture and excellent mechanical properties.

【0016】[0016]

【作用】本発明は以上の構成を採っているので以下の作
用を奏する。2種以上のポリマーからなる複合紡糸繊維
の海成分を除去し、十分な強度を有する極細繊維あるい
は網目状繊維を安定して得るには、島成分を均一に分散
させることが必要である。
Since the present invention has the above-mentioned structure, it has the following effects. It is necessary to uniformly disperse the island component in order to remove the sea component of the composite spun fiber composed of two or more polymers and to stably obtain the ultrafine fiber or the reticulated fiber having sufficient strength.

【0017】本発明では、ポリアミドとポリエステルの
溶融粘度を、島成分であるポリアミドの含有率に応じて
変化させることにより、島成分の均一分散と紡糸の安定
化を両立させている。
In the present invention, the melt viscosity of the polyamide and the polyester is changed according to the content of the polyamide which is the island component, so that the island component is uniformly dispersed and the spinning is stabilized.

【0018】即ち、ポリアミドの含有率が少ない(30〜
40重量%)場合には、ポリアミドの溶融粘度が低くても
容易に島成分として均一分散するが、ポリアミドの含有
率の増加(40〜55重量%)に伴って分散が起こりにくく
なり、極細繊維が得られなくなるので、溶融粘度を相対
的に高めてやる必要がある。
That is, the content of polyamide is low (30 to
In the case of 40% by weight), even if the melt viscosity of the polyamide is low, it is easily dispersed uniformly as an island component, but as the content of the polyamide increases (40 to 55% by weight), the dispersion hardly occurs, and the ultrafine fiber Therefore, it is necessary to relatively increase the melt viscosity.

【0019】特に、ポリアミドの含有率が50%を越える
ような場合、即ち島成分が海成分よりも多くなるような
場合には、ポリアミドの溶融粘度をポリエステルのそれ
よりも高めることが必要である。
In particular, when the polyamide content exceeds 50%, that is, when the island component is larger than the sea component, it is necessary to increase the melt viscosity of the polyamide to be higher than that of the polyester. .

【0020】[0020]

【実施例】以下、実施例を挙げて本発明をさらに具体的
に説明する。なお、実施例中の%は重量%を表わす。
EXAMPLES The present invention will be described in more detail below with reference to examples. In the examples,% represents% by weight.

【0021】[0021]

【実施例1、2および比較例1、2】溶融温度 280℃、
剪断速度100sec-1下で測定した溶融粘度が500 ポイズの
ナイロン6 と溶融粘度が2000ポイズのポリエチレンテレ
フタレートを、ナイロンの含有率αが20、30、40、50%
になるようにチップブレンドした後、紡糸孔数36個の溶
融紡糸装置に供給し、口金温度 280℃、巻取り速度1000
m/分で紡糸し、次いで85℃に加熱したホットローラーを
用いて 3倍に延伸し、単繊維繊度が2.5 デニールの複合
紡糸繊維を得た。
Examples 1 and 2 and Comparative Examples 1 and 2 Melting temperature 280 ° C.,
Nylon 6 with a melt viscosity of 500 poise measured at a shear rate of 100 sec -1 and polyethylene terephthalate with a melt viscosity of 2000 poise were used with a nylon content α of 20, 30, 40, 50%.
After blending so as to obtain a melt, a melt spinning machine with 36 spinning holes was fed, the spinneret temperature was 280 ° C, and the winding speed was 1000.
It was spun at m / min and then stretched 3 times using a hot roller heated to 85 ° C to obtain a composite spun fiber having a single fiber fineness of 2.5 denier.

【0022】この複合繊維を20Gの筒編地となし、10%
の水酸化ナトリウム水溶液を用いて100℃、1時間アル
カリ減量し、ポリエチレンテレフタレートをほぼ完全に
溶出除去した。得られた編地のうち、αが30、40%のも
のは独特のソフトな風合と十分な強度を有していた。ま
た、αが20%のものは強度が低く、一方50%のものは極
細繊維が得られなかった。結果を表1に示す。
This composite fiber was made into a 20G tubular knitted fabric, and 10%
Alkali weight was reduced for 1 hour at 100 ° C. using the aqueous sodium hydroxide solution described above to elute and remove polyethylene terephthalate almost completely. Among the knitted fabrics obtained, those with α of 30 and 40% had a unique soft texture and sufficient strength. Further, those having an α of 20% had low strength, while those having an α of 50% could not obtain ultrafine fibers. The results are shown in Table 1.

【0023】[0023]

【実施例3】実施例1において、溶融粘度が4800ポイズ
のナイロン6 と溶融粘度が2800ポイズのポリエチレンテ
レフタレートを用い、αを55%とした以外は実施例1と
同様に実施した。結果を表1に示す。
Example 3 The procedure of Example 1 was repeated, except that nylon 6 having a melt viscosity of 4800 poise and polyethylene terephthalate having a melt viscosity of 2800 poise were used and α was set to 55%. The results are shown in Table 1.

【0024】[0024]

【比較例3】実施例3において、ポリエチレンテレフタ
レートの溶融粘度を 600ポイズとしαを60%とした以外
は実施例3と同様に実施した。結果を表1に示す。
Comparative Example 3 The procedure of Example 3 was repeated, except that the melt viscosity of polyethylene terephthalate was changed to 600 poise and α was set to 60%. The results are shown in Table 1.

【0025】[0025]

【表1】 [Table 1]

【0026】[0026]

【発明の効果】本発明によれば、ポリアミドとポリエス
テルからなる複合紡糸繊維を長時間安定して製造するこ
とができ、しかも該複合繊維を繊維集合体となしてポリ
エステルを溶解除去した後も十分な強度を有し、所々で
融着した網目状繊維束や多数の筋状溝を有する繊維から
なる、独特の風合を呈する繊維集合体が製造できる。
According to the present invention, a composite spun fiber composed of polyamide and polyester can be stably produced for a long time, and further, even after the composite fiber is formed into a fiber aggregate and the polyester is dissolved and removed. It is possible to produce a fiber assembly having various strengths and having a unique texture, which is composed of network fiber bundles fused in places and fibers having a large number of streak grooves.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ポリアミドとポリエステルからなる複合
紡糸繊維を繊維集合体となした後ポリエステル成分を溶
解除去し、実質的にポリアミド繊維からなる繊維集合体
を製造するに際し、該複合繊維中のポリアミドの含有率
αを30〜55重量%となし、且つ該複合繊維の紡糸温度で
且つ剪断速度100sec-1下における溶融粘度が下記 (1)
または (2) 式の関係を満足するポリアミドおよびポリ
エステルを用いることを特徴とする繊維集合体の製造方
法。 (1)30 ≦α<40のとき、2000≦MVT 且つMVN /M
T ≧0.18 (2)40 ≦α≦55のとき、2000≦MVT 且つMVN /M
T ≧0.1 ×α−3.82 (ここで、αは複合繊維中のポリアミドの含有率〔重量
%〕、MVN およびMN T は、それぞれポリアミドおよ
びポリエステルの溶融粘度〔ポイズ〕を表わす)
1. A composite composed of polyamide and polyester.
After forming the spun fiber into a fiber aggregate, melt the polyester component.
A fiber assembly composed of polyamide fibers after being removed
When manufacturing the, the content of polyamide in the composite fiber
α is 30 to 55% by weight, and at the spinning temperature of the composite fiber
And shear rate 100sec-1The melt viscosity below is (1)
Or polyamide and poly that satisfy the relationship of formula (2)
Method for producing fiber assembly characterized by using ester
Law. (1) When 30 ≤ α <40, 2000 ≤ MVTAnd MVN/ M
VT≧ 0.18 (2) When 40 ≦ α ≦ 55, 2000 ≦ MVTAnd MVN/ M
VT≧ 0.1 × α−3.82 (where α is the polyamide content in the composite fiber [weight
%], MVNAnd MN TAre polyamide and
And represents the melt viscosity (poise) of polyester)
JP5061908A 1993-03-22 1993-03-22 Production of fiber assembly Pending JPH06272114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5061908A JPH06272114A (en) 1993-03-22 1993-03-22 Production of fiber assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5061908A JPH06272114A (en) 1993-03-22 1993-03-22 Production of fiber assembly

Publications (1)

Publication Number Publication Date
JPH06272114A true JPH06272114A (en) 1994-09-27

Family

ID=13184735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5061908A Pending JPH06272114A (en) 1993-03-22 1993-03-22 Production of fiber assembly

Country Status (1)

Country Link
JP (1) JPH06272114A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
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JP2005200459A (en) * 2004-01-13 2005-07-28 Toray Ind Inc Pellet
WO2007018165A1 (en) 2005-08-10 2007-02-15 Toray Industries, Inc. Sponge-like structural body or powder, and process for production thereof
EP2006051A2 (en) 2004-04-21 2008-12-24 Toray Industries, Inc. Abrasive cloth and method for producing nanofiber structure
US8460790B2 (en) 2002-10-23 2013-06-11 Toray Industries, Inc. Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them
US8501642B2 (en) 2004-02-19 2013-08-06 Toray Industries, Inc. Nano-fiber compound solutions, emulsions and gels, production method thereof, Nano-fiber synthetic papers, and production method thereof
EP2899305A1 (en) 2014-01-27 2015-07-29 Glo-one Co., Ltd. Method of manufacturing biodegradable non-woven web and apparatus therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8460790B2 (en) 2002-10-23 2013-06-11 Toray Industries, Inc. Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them
JP2005200459A (en) * 2004-01-13 2005-07-28 Toray Ind Inc Pellet
JP4710227B2 (en) * 2004-01-13 2011-06-29 東レ株式会社 pellet
US8501642B2 (en) 2004-02-19 2013-08-06 Toray Industries, Inc. Nano-fiber compound solutions, emulsions and gels, production method thereof, Nano-fiber synthetic papers, and production method thereof
EP2006051A2 (en) 2004-04-21 2008-12-24 Toray Industries, Inc. Abrasive cloth and method for producing nanofiber structure
WO2007018165A1 (en) 2005-08-10 2007-02-15 Toray Industries, Inc. Sponge-like structural body or powder, and process for production thereof
EP2899305A1 (en) 2014-01-27 2015-07-29 Glo-one Co., Ltd. Method of manufacturing biodegradable non-woven web and apparatus therefor

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