JPS6132404B2 - - Google Patents

Info

Publication number
JPS6132404B2
JPS6132404B2 JP50017950A JP1795075A JPS6132404B2 JP S6132404 B2 JPS6132404 B2 JP S6132404B2 JP 50017950 A JP50017950 A JP 50017950A JP 1795075 A JP1795075 A JP 1795075A JP S6132404 B2 JPS6132404 B2 JP S6132404B2
Authority
JP
Japan
Prior art keywords
crimp
yarn
tension
unevenness
terephthalate
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.)
Expired
Application number
JP50017950A
Other languages
Japanese (ja)
Other versions
JPS5196550A (en
Inventor
Takafumi Yoshikawa
Kazunari Hayashi
Iwao Fujimoto
Kyotaka Ozaki
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 JP1795075A priority Critical patent/JPS5196550A/en
Publication of JPS5196550A publication Critical patent/JPS5196550A/en
Publication of JPS6132404B2 publication Critical patent/JPS6132404B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は複合フイラメントの捲縮発現方法に関
するものである。 2種のポリエステル糸重合体を複合紡糸した複
合フイラメントを弛緩熱処理してスパイラル状の
捲縮を有する捲縮糸を製造することはよく知られ
ている。 しかしながら、弛緩状態で連続的に熱処理する
ことは、種々の方法が考えられているにもかかわ
らず、実際に行うには多くの難しい問題がある。
弛緩状態で処理する際には、処理時の糸にかかる
張力が重要であり、この張力を低く保つことが必
要で、通常張力が高くなると発現処理糸の捲縮性
は低下する。従つて、連続処理時に張力の変化が
伴うと捲縮糸の捲縮に斑が発生すると共に、それ
に伴う捲縮斑が発生してデニール斑、染斑が発生
する。このように低張力での連続的な捲縮発現の
実施は困難である。 本発明はかかる状況にかんがみ連続的な処理に
より糸斑、捲縮斑の少い捲縮糸を得る方法を鋭意
研究した結果、特定のポリエステルを組合せた複
合フイラメントは熱処理時に糸条へかかる張力を
ある範囲の値にすることにより良好な捲縮が発現
することを見い出し、前述の要求を満足する捲縮
糸が得られる本発明に到達したものである。 即ち、本発明は、構成成分の一方がポリエチレ
ンテレフタレートであり、他方の構成成分がポリ
テトラメチレンテレフタレートあるいはポリトリ
メチレンテレフタレートである複合フイラメント
をデニール当り0.2〜1.0gの張力下で150℃〜310
℃の温度で熱処理することを特徴とする複合糸の
捲縮発現方法である。 本発明で使用するポリエステル複合フイラメン
トはポリエチレンテレフタレートとポリテトラメ
チレンテレフタレート又はポリトリメチレンテレ
フタレートとを組合せたものである。 ここで言う「ポリテトラメチレンテレフタレー
ト」は繰返し単位の80モル%以上好ましくは90モ
ル%以上がテトラメチレンテレフタレートである
ポリエステルのことであり、20モル%以下の割合
で共重合され得る第3成分としては、イソフタル
酸、フタル酸、メチルテレフタル酸、ヘキサヒド
ロテレフタル酸、ナフタレンジカルボン酸、ジフ
エニルジカルボン酸、セバチン酸、アジピン酸等
の二塩基酸類;ネオペンチルグリコール、トリメ
チレングリコール、ヘキサメチレングリコール、
1,4―シクロヘキサンジメタノール、1,4―
ビスヒドロキシベンゼン、ビスフエノールA等の
グリコール類;グリコール酸、p―オキシ安息香
酸等のオキシカルボン酸類あるいはこれらの機能
的誘導体があげられる。 また「ポリエチレンテレフタレート」は繰返し
単位の80モル%以上、好ましくは90モル%以上が
エチレンテレフタレートであるポリエステルのこ
とであり、20モル%以下の割合で共重合される第
3成分としては、前述の二塩基酸類、グリコール
類、オキシカルボン酸類があげられる。 また「ポリトリメチレンテレフタレート」は繰
返し単位の80モル%以上、好ましくは90モル%以
上がトリメチレンテレフタレートであるポリエス
テルのことであり、20モル%以下の割合で共重合
される第3成分としては、前述の二塩基酸類、グ
リコール類、オキシカルボン酸類があげられる。 これらのポリテトラメ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及びポリエチレ
ンテレフタレートには重合度調整剤、安定剤、艷
消剤、着色剤等を含んでも差し支えない。 複合繊維の製造は従来公知の複合紡糸装置を使
用し、通常の条件で行うことができ、複合形態は
サイド・バイ・サイド型、偏心シーズコア型の何
れでもよい。前記のポリエステルの複合比は任意
に選定しうるが、一般に20:80〜80:20の範囲が
好ましい。 この複合フイラメントを延伸すると、弛緩する
だけでも捲縮を発現するが、この捲縮は捲縮が不
充分である。 このため本発明では、この複合フイラメントを
デニール当り0.2〜1.0gの張力下で150℃〜320
℃、好ましくは150℃〜230℃の温度で熱処理す
る。このようにすると糸斑、捲縮斑のない良好な
捲縮糸となる。 この複合フイラメントの捲縮発現性を第1図に
示す。180℃の空気中で横軸に示す張力下で1分
間熱処理した糸条の見掛捲縮率を縦軸に示したも
のである。低張力下では勿論捲縮は良好に発現す
るが、その張力は2mg/de以下であり、このよ
うな低張力で連続熱処理することにより糸斑、捲
縮斑の小さい捲縮糸をうることは非常に困難であ
る。又、張力が2mg/de〜100mg/deの範囲では
良好な捲縮が得られない。一方、張力が200mg/
de以上になると良好な捲縮が発現する。しか
し、1.0g/deを超えると捲縮発現が再び低下す
ると同時に張力が高すぎるために処理時に毛羽の
発生等で連続処理が難しくなる。本発明において
は複合フイラメントを上記張力下に150℃〜350℃
で熱処理を行うが、熱処理時間が短い場合は高温
が望ましい。熱処理時間は0.1秒以上であること
が望ましく、それ以下では捲縮性が低下する。ま
た融点以上での熱処理は処理時間が長いと融着が
発生し、極端な場合は断糸することになるので、
短時間で処理を行うことが必要である。また熱処
理媒体は気体でもよいし、又、ヒーターに接触し
て行つても差し支えない。 本発明の捲縮糸製造方法は通常の捲縮発現方法
と全く異り、高張力下で熱処理する方法であるた
め、連続熱処理が極めて容易であり、しかも捲縮
の発現斑が少くて糸斑、捲縮斑の小さい捲縮糸が
得られ、捲縮糸製造に有利な方法である。以下実
施例を示す。 実施例 オルソクロロフエノール中25℃で測定した極限
粘度が0.64のポリエチレンテレフタレート及びオ
ルソクロロフエノール中25℃で測定した還元粘度
(ηsp/o)が1.55のポリテトラメチレンテレフ
タレートを複合比1:1でサイド・バイ・サイド
型に複合紡糸し480de/30filsの複合フイラメン
トを得た。該複合フイラメントを80℃の延伸ピン
を用いて3.2倍に延伸し150デニールのフイラメン
トを得た。 次にこの延伸フイラメントをスリツトヒーター
を用いて空気中で100m/minの速度で表1に示
す条件で捲縮発現を行つた。それぞれの条件にお
いて得られた捲縮糸の見掛捲縮率、毛羽、糸斑、
及び捲縮斑の評価結果を表1に併せて示す。 尚、捲縮糸の糸斑及び捲縮斑の評価は、得られ
た捲縮糸の編物を染色し、筋状の斑(糸斑)の有
無、及びタイトスポツト(捲縮斑)の有無を検査
した。 かかる糸斑及び捲縮斑、及び毛羽が無く、しか
も見掛捲縮率が12%以上のものを合格とした。 【表】
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for developing crimp in a composite filament. It is well known that a composite filament obtained by composite spinning of two types of polyester yarn polymers is subjected to relaxation heat treatment to produce a crimped yarn having spiral crimps. However, although various methods have been considered for continuous heat treatment in a relaxed state, there are many difficult problems in actually carrying out the heat treatment.
When processing the yarn in a relaxed state, the tension applied to the yarn during treatment is important, and it is necessary to keep this tension low; normally, as the tension increases, the crimpability of the expression-treated yarn decreases. Therefore, when the tension changes during continuous processing, unevenness occurs in the crimp of the crimped yarn, and accompanying crimp unevenness occurs, resulting in denier unevenness and dyeing unevenness. It is difficult to continuously develop crimp under such low tension. In view of this situation, the present invention was developed as a result of intensive research on a method for obtaining crimped yarn with less yarn unevenness and crimp unevenness through continuous processing.The present invention was developed as a result of intensive research into a method for obtaining crimped yarn with less yarn unevenness and crimp unevenness through continuous processing. It has been found that good crimp can be achieved by using a value within this range, and the present invention has been achieved, which provides a crimped yarn that satisfies the above-mentioned requirements. That is, in the present invention, a composite filament in which one component is polyethylene terephthalate and the other component is polytetramethylene terephthalate or polytrimethylene terephthalate is heated at 150° C. to 310° C. under a tension of 0.2 to 1.0 g per denier.
This is a method for developing crimp in a composite yarn, which is characterized by heat treatment at a temperature of °C. The polyester composite filament used in the present invention is a combination of polyethylene terephthalate and polytetramethylene terephthalate or polytrimethylene terephthalate. "Polytetramethylene terephthalate" as used herein refers to a polyester in which 80 mol% or more, preferably 90 mol% or more of repeating units are tetramethylene terephthalate, and as a third component that can be copolymerized in a proportion of 20 mol% or less. are dibasic acids such as isophthalic acid, phthalic acid, methylterephthalic acid, hexahydroterephthalic acid, naphthalene dicarboxylic acid, diphenyldicarboxylic acid, sebacic acid, adipic acid; neopentyl glycol, trimethylene glycol, hexamethylene glycol,
1,4-cyclohexanedimethanol, 1,4-
Examples include glycols such as bishydroxybenzene and bisphenol A; oxycarboxylic acids such as glycolic acid and p-oxybenzoic acid, and functional derivatives thereof. In addition, "polyethylene terephthalate" refers to a polyester in which 80 mol% or more, preferably 90 mol% or more of repeating units are ethylene terephthalate, and the third component copolymerized at a ratio of 20 mol% or less is the above-mentioned Examples include dibasic acids, glycols, and oxycarboxylic acids. Furthermore, "polytrimethylene terephthalate" refers to a polyester in which 80 mol% or more, preferably 90 mol% or more of repeating units are trimethylene terephthalate, and the third component copolymerized at a proportion of 20 mol% or less is , the aforementioned dibasic acids, glycols, and oxycarboxylic acids. These polytetramethylene terephthalates,
Polytrimethylene terephthalate and polyethylene terephthalate may contain a polymerization degree regulator, a stabilizer, a quenching agent, a coloring agent, etc. The composite fiber can be produced using a conventionally known composite spinning apparatus under normal conditions, and the composite form may be either a side-by-side type or an eccentric sheathed core type. The composite ratio of the polyesters can be selected arbitrarily, but is generally preferably in the range of 20:80 to 80:20. When this composite filament is drawn, crimp occurs even if it is relaxed, but the crimp is insufficient. Therefore, in the present invention, this composite filament is
℃, preferably at a temperature of 150℃ to 230℃. In this way, a good crimped yarn with no yarn unevenness or crimp unevenness can be obtained. The crimp development of this composite filament is shown in FIG. The vertical axis shows the apparent crimp rate of the yarn heat-treated in air at 180° C. for 1 minute under the tension shown on the horizontal axis. Of course, crimp occurs well under low tension, but the tension is less than 2 mg/de, and it is very difficult to obtain crimped yarn with small unevenness and crimp spots by continuous heat treatment under such low tension. It is difficult to Further, if the tension is in the range of 2 mg/de to 100 mg/de, good crimp cannot be obtained. On the other hand, the tension is 200mg/
Good crimp appears when it becomes more than de. However, if it exceeds 1.0 g/de, the appearance of crimp decreases again and at the same time, the tension is too high, making continuous processing difficult due to the generation of fuzz during processing. In the present invention, the composite filament is heated at 150°C to 350°C under the above tension.
However, if the heat treatment time is short, high temperature is preferable. It is desirable that the heat treatment time is 0.1 seconds or more; if it is shorter than that, crimpability will decrease. In addition, heat treatment above the melting point can cause fusion if the treatment time is long, and in extreme cases, yarn breakage may occur.
It is necessary to perform processing in a short time. Further, the heat treatment medium may be a gas, or may be carried out in contact with a heater. The crimped yarn production method of the present invention is completely different from the usual crimp development method, and because it involves heat treatment under high tension, continuous heat treatment is extremely easy, and there is little unevenness in the appearance of crimp. A crimped yarn with small crimp spots can be obtained, and this method is advantageous for producing crimped yarn. Examples are shown below. Example Polyethylene terephthalate with an intrinsic viscosity of 0.64 measured in orthochlorophenol at 25°C and polytetramethylene terephthalate with a reduced viscosity (ηsp/o) of 1.55 measured in orthochlorophenol at 25°C in a composite ratio of 1:1. - A composite filament of 480 de/30 fils was obtained by composite spinning in a by-side type. The composite filament was stretched 3.2 times using a stretching pin at 80°C to obtain a filament of 150 denier. Next, this drawn filament was crimped in air using a slit heater at a speed of 100 m/min under the conditions shown in Table 1. Apparent crimp rate, fuzz, thread unevenness, of crimped yarn obtained under each condition
Table 1 also shows the evaluation results for crimp spots. In addition, to evaluate the thread spots and crimp spots of the crimped yarn, the obtained knitted fabric of the crimped yarn was dyed and the presence or absence of streak-like spots (thread spots) and the presence of tight spots (crimping spots) were examined. . Those with no yarn unevenness, crimp unevenness, or fuzz, and an apparent crimp rate of 12% or more were considered to be passed. 【table】

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は180℃の空気中における熱処理の「張
力と見掛捲縮率の関係」を示す図である。
FIG. 1 is a diagram showing the ``relationship between tension and apparent crimp rate'' during heat treatment in air at 180°C.

Claims (1)

【特許請求の範囲】[Claims] 1 構成成分の一方がポリエチレンテレフタレー
トであり、他方の構成成分がポリテトラメチレン
テレフタレートあるいはポリトリメチレンテレフ
タレートである複合フイラメントをデニール当り
0.2〜1.0gの張力下で150℃〜310℃の温度で熱処
理することを特徴とする複合糸の捲縮発現方法。
1 Composite filament in which one component is polyethylene terephthalate and the other component is polytetramethylene terephthalate or polytrimethylene terephthalate per denier
A method for developing crimp in a composite yarn, which comprises heat-treating at a temperature of 150°C to 310°C under a tension of 0.2 to 1.0 g.
JP1795075A 1975-02-14 1975-02-14 Fukugoshino kenshukuhatsugenhoho Granted JPS5196550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1795075A JPS5196550A (en) 1975-02-14 1975-02-14 Fukugoshino kenshukuhatsugenhoho

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1795075A JPS5196550A (en) 1975-02-14 1975-02-14 Fukugoshino kenshukuhatsugenhoho

Publications (2)

Publication Number Publication Date
JPS5196550A JPS5196550A (en) 1976-08-24
JPS6132404B2 true JPS6132404B2 (en) 1986-07-26

Family

ID=11958034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1795075A Granted JPS5196550A (en) 1975-02-14 1975-02-14 Fukugoshino kenshukuhatsugenhoho

Country Status (1)

Country Link
JP (1) JPS5196550A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002038847A1 (en) * 2000-11-08 2002-05-16 E. I. Du Pont De Nemours And Company Process for treating knits containing polyester biocomponent fibers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100737A (en) * 1982-12-02 1984-06-11 帝人株式会社 Polyester composite crimped yarn and production thereof
KR100522790B1 (en) * 1998-11-28 2005-12-21 주식회사 휴비스 Manufacturing method of polytrimethylene terephthalate flammable work
US6548429B2 (en) * 2000-03-01 2003-04-15 E. I. Du Pont De Nemours And Company Bicomponent effect yarns and fabrics thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002038847A1 (en) * 2000-11-08 2002-05-16 E. I. Du Pont De Nemours And Company Process for treating knits containing polyester biocomponent fibers

Also Published As

Publication number Publication date
JPS5196550A (en) 1976-08-24

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