JP2002363827A - Latent crimping polyamide yarn and method for producing the same - Google Patents
Latent crimping polyamide yarn and method for producing the sameInfo
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- JP2002363827A JP2002363827A JP2001171170A JP2001171170A JP2002363827A JP 2002363827 A JP2002363827 A JP 2002363827A JP 2001171170 A JP2001171170 A JP 2001171170A JP 2001171170 A JP2001171170 A JP 2001171170A JP 2002363827 A JP2002363827 A JP 2002363827A
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- polyamide
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粘度差を有する２
種類のポリアミドがサイドバイサイド型に配置された潜
在捲縮性能を有するポリアミド潜在捲縮糸及びその製造
方法に関するものである。[0001] The present invention relates to a method for producing a polymer having a viscosity difference of 2.
The present invention relates to a latently crimped polyamide yarn having latent crimping performance in which various kinds of polyamides are arranged in a side-by-side type, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来からポリアミド繊維は衣料用途に広
く用いられている。衣料用ポリアミドの代表であるナイ
ロン６やナイロン６６等で一種類のポリマーからなる単
一糸は、繊維自体にストレッチ性が殆どないため、仮撚
加工等を行ってストレッチ性を付与し、ストレッチ性の
ある織編物用に使用している。しかしながら、このよう
な単一糸に加工を施したものでは、十分に満足できるス
トレッチ性を有する布帛を得ることは困難であった。2. Description of the Related Art Conventionally, polyamide fibers have been widely used for clothing. A single yarn made of one type of polymer such as nylon 6 or nylon 66, which is a representative of polyamide for clothing, has little stretchability in the fiber itself, and thus is subjected to false twisting or the like to impart stretchability, and stretchability is improved. Used for certain woven and knitted fabrics. However, it is difficult to obtain a fabric having a sufficiently satisfactory stretch property by processing such a single yarn.
【０００３】そこで、弾性を有するポリマーで繊維を形
成することによってストレッチ性を有する布帛を得る方
法や、異なる性質のポリマーを用い、染色等の熱処理で
捲縮を発現する潜在捲縮性能を有する複合繊維とするこ
とによって、ストレッチ性を有する布帛を得る方法が提
案されている。[0003] Therefore, a method of obtaining a fabric having a stretch property by forming fibers with an elastic polymer, or a composite having a latent crimping property of expressing a crimp by heat treatment such as dyeing using a polymer having a different property. There has been proposed a method of obtaining a fabric having stretch properties by using fibers.
【０００４】前者の弾性を有するポリマーからなる繊維
においては、ポリウレタン系弾性糸が多く用いられる
が、染色性や耐光性が悪く、ナイロン６やナイロン６６
でカバーリング加工をして用いるのが一般的である。ま
た、特開平５７−１９３５２１号公報には、ストレッチ
性を有する繊維として、ナイロン系エラストマーとポリ
アミドをサイドバイサイド型や偏芯芯鞘型に配した複合
繊維が記載されている。[0004] In the former fiber made of a polymer having elasticity, polyurethane-based elastic yarn is often used, but the dyeability and light resistance are poor, and nylon 6 and nylon 66 are used.
In general, it is used after performing a covering process. Japanese Patent Application Laid-Open No. 57-193521 describes a composite fiber in which a nylon-based elastomer and a polyamide are arranged in a side-by-side type or an eccentric core-sheath type as a stretchable fiber.
【０００５】しかしながら、これらの繊維はいずれも、
カバーリングの加工費やポリウレタン弾性糸及びナイロ
ン系エラストマーが高価であり、コスト面で不利であっ
た。[0005] However, all of these fibers are
The processing cost of the cover ring, the polyurethane elastic yarn and the nylon-based elastomer are expensive, which is disadvantageous in cost.
【０００６】また、後者の異なる性質のポリマーを用い
て複合繊維にする場合には、繊維断面形状をサイドバイ
サイド型として、２成分のポリマーの粘度差を利用して
熱水収縮率差を持たせたり、あるいは、熱水収縮率の異
なるポリマーを用いることが一般的である。このような
複合繊維は、後加工等が必要ない分製造するにはコスト
面で有利であり、布帛にある程度の伸縮を付与すること
はできたが、十分に満足できる程度の伸縮を付与するこ
とはできなかった。[0006] In the case of using the latter polymer having different properties to form a conjugate fiber, the cross-sectional shape of the fiber is set to be a side-by-side type, and a difference in shrinkage ratio between hot water is provided by utilizing the difference in viscosity between the two-component polymers. Alternatively, polymers having different hot water shrinkage rates are generally used. Such a conjugate fiber is advantageous in terms of cost to manufacture because no post-processing or the like is required, and it was possible to impart a certain degree of expansion and contraction to the fabric, but to provide a sufficiently satisfactory degree of expansion and contraction. Could not.
【０００７】さらに、上記のような繊維の製造方法とし
ては、特公昭４８−００８５２６号公報において、低紡
速で引き取った後、高倍率で延伸及び特定の温度範囲で
熱処理を行うことにより捲縮性能を向上させたナイロン
６とナイロン６／６６共重合体のサイドバイサイド型複
合繊維の製造方法が開示されている。しかしながら同方
法では紡速や延伸倍率等の製造条件が最適化されていな
いため、十分な捲縮率を付与することができなかった。Further, as a method for producing the above-mentioned fiber, Japanese Patent Publication No. 48-008526 discloses a method in which a fiber is drawn at a low spinning speed, stretched at a high magnification, and heat-treated at a specific temperature range. A method for producing a side-by-side conjugate fiber of nylon 6 and a nylon 6/66 copolymer with improved performance is disclosed. However, in this method, a sufficient crimp rate could not be provided because production conditions such as spinning speed and stretch ratio were not optimized.
【０００８】そこで、本発明者らは、特願2000-299217
号において、これらの問題点を解決することができるも
のとして、相対粘度差を有する２種類のポリアミドを用
いてサイドバイサイド型に貼り合わせた複合繊維であっ
て、熱水収縮率、捲縮率を特定のものとしたものを提案
した。この複合繊維は、得られる布帛に十分なストレッ
チ性を付与することができるものであったが、さらに、
本発明者らは開発を進めるうちに、ストレッチ性に優れ
た布帛を得ることができる複合繊維の特性として、弾性
率という物性値が重要であることを見出した。[0008] The inventors of the present invention have disclosed in Japanese Patent Application No. 2000-299217.
In order to solve these problems, a composite fiber bonded in a side-by-side type using two types of polyamides having a relative viscosity difference, and a hot water shrinkage rate and a crimp rate are specified. And what was suggested. This conjugate fiber was able to impart sufficient stretchability to the resulting fabric,
The present inventors have found that, during the development, the property value of elastic modulus is important as a property of a conjugate fiber capable of obtaining a fabric having excellent stretchability.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、コスト面で
有利に得ることができ、得られる織物、編物、不織布等
の布帛に十分なストレッチ性を付与することが可能なポ
リアミド潜在捲縮糸及びその製造方法を提供することを
技術的な課題とするものである。DISCLOSURE OF THE INVENTION The present invention provides a latent latent crimped yarn which can be advantageously obtained in terms of cost and which can impart sufficient stretchability to the obtained fabric such as woven fabric, knitted fabric and nonwoven fabric. And a method for manufacturing the same.
【００１０】[0010]
【課題を解決するための手段】本発明者らは、上記の課
題を解決すべく検討した結果、本発明に到達した。すな
わち、本発明は、次の（ａ）〜（ｂ）を要旨とするもの
である。 （ａ）粘度差を有する２種類のポリアミドをサイドバイ
サイド型に貼り合わせた繊維において、高粘度ポリアミ
ドと低粘度ポリアミドの相対粘度の差が（１）式を満足
し、かつ熱水収縮率が３〜２５％、捲縮率が２０％以
上、弾性率が７０％以上であることを特徴とするポリア
ミド潜在捲縮糸。 （１）０．４≦Δηｈ−Δηｌ≦1.6 ただし、Δηｈ：高粘度ポリアミドの相対粘度 Δηｌ：低粘度ポリアミドの相対粘度 （ｂ） 粘度差を有する２種類のポリアミドをサイドバ
イサイド型の紡糸口金で溶融紡出し、冷却固化し、油剤
を付与した後、速度２０００〜５０００ｍ／分のローラ
で引き取り、延伸倍率１．１〜２．５倍で延伸し、温度
１２０〜２００℃で熱処理を施すことを特徴とする
（ａ）記載のポリアミド潜在捲縮糸の製造方法。Means for Solving the Problems The present inventors have studied to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention has the following (a) and (b). (A) In a fiber obtained by laminating two kinds of polyamides having a difference in viscosity in a side-by-side type, the difference in the relative viscosity between the high-viscosity polyamide and the low-viscosity polyamide satisfies the expression (1), and the hot water shrinkage ratio is 3 to 3. A latent latent crimped yarn comprising 25%, a crimp rate of 20% or more, and an elastic modulus of 70% or more. (1) 0.4 ≦ Δηh−Δηl ≦ 1.6, where Δηh: Relative viscosity of high viscosity polyamide Δηl: Relative viscosity of low viscosity polyamide (b) Melt spinning of two kinds of polyamides having a difference in viscosity using a side-by-side spinneret. After taking out, solidifying by cooling, applying an oil agent, taking up with a roller at a speed of 2000 to 5000 m / min, stretching at a stretching ratio of 1.1 to 2.5 times, and performing heat treatment at a temperature of 120 to 200 ° C. (A) A method for producing a latently crimped polyamide yarn according to (a).
【００１１】[0011]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明の潜在捲縮糸は、粘度差を有する２種類の
ポリアミドをサイドバイサイド型に貼り合わせた繊維で
ある。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The latently crimped yarn of the present invention is a fiber in which two types of polyamides having a difference in viscosity are bonded in a side-by-side type.
【００１２】本発明におけるポリアミドとしては、例え
ばナイロン６、ナイロン６６、ナイロン６９、ナイロン
４６、ナイロン６１０、ナイロン１２、ポリメタキシレ
ンアジパミドやそれら各成分の共重合体が挙げられる。
このなかでも特に、粘度の異なるナイロン６を用いた場
合や、高粘度ポリアミドとしてナイロン６／６６共重合
体を、低粘度ポリアミドとしてナイロン６を用いた組み
合わせが好適である。ナイロン６／６６共重合体を用い
た場合のナイロン６６の共重合割合は、融点や収縮率の
観点から５〜３５モル％とすることが好ましい。Examples of the polyamide in the present invention include nylon 6, nylon 66, nylon 69, nylon 46, nylon 610, nylon 12, polymethaxylene adipamide, and copolymers of these components.
Of these, a combination of nylon 6 having different viscosities and a combination of nylon 6/66 copolymer as a high viscosity polyamide and nylon 6 as a low viscosity polyamide are particularly preferable. When the nylon 6/66 copolymer is used, the copolymerization ratio of nylon 66 is preferably from 5 to 35 mol% from the viewpoint of the melting point and the shrinkage.
【００１３】なお、高粘度ポリアミド、低粘度ポリアミ
ドともに本発明の効果を損なわない範囲であれば、艶消
剤、難燃剤、顔料等の種々の添加物を添加してもよい。In addition, various additives such as a matting agent, a flame retardant, and a pigment may be added as long as the effects of the present invention are not impaired for both the high-viscosity polyamide and the low-viscosity polyamide.
【００１４】本発明の潜在捲縮糸は、高い捲縮性能を得
るために、高粘度ポリアミドの相対粘度Δηｈと低粘度
ポリアミドの相対粘度Δηｌの差を０．４〜１．６とす
ることが必要であり、好ましくは０．４〜１．２、さら
に好ましくは０．５〜１．０である。In the latently crimped yarn of the present invention, the difference between the relative viscosity Δηh of the high-viscosity polyamide and the relative viscosity Δηl of the low-viscosity polyamide is set to 0.4 to 1.6 in order to obtain high crimping performance. It is necessary, preferably 0.4 to 1.2, and more preferably 0.5 to 1.0.
【００１５】ポリアミドの相対粘度は、例えば粘度の異
なるナイロン６の組み合わせの場合は、高粘度のナイロ
ン６の相対粘度は、２．７〜４．２が好ましく、さらに
好ましくは２．７〜３．９であり、より好適には２．９
〜３．５であり、低粘度のナイロン６の相対粘度は、
２．０〜３．２が好ましく、さらに好ましくは２．０〜
２．９であり、より好適には２．３〜２．７である。ナ
イロン６とナイロン６／６６共重合体の組み合わせの場
合では、ナイロン６の相対粘度は２．０〜３．２が好ま
しく、さらに好ましくは２．０〜２．９、より好適には
２．３〜２．７であり、ナイロン６／６６共重合体の相
対粘度は、２．８〜４．２が好ましく、さらに好ましく
は２．８〜３．７、より好適には２．９〜３．５であ
る。The relative viscosity of the polyamide is, for example, in the case of a combination of nylons 6 having different viscosities, the relative viscosity of the high viscosity nylon 6 is preferably 2.7 to 4.2, more preferably 2.7 to 3.2. 9, more preferably 2.9.
~ 3.5, the relative viscosity of the low viscosity nylon 6 is
2.0 to 3.2 are preferable, and 2.0 to 3.2 are more preferable.
2.9, and more preferably 2.3 to 2.7. In the case of a combination of nylon 6 and a nylon 6/66 copolymer, the relative viscosity of nylon 6 is preferably 2.0 to 3.2, more preferably 2.0 to 2.9, and even more preferably 2.3. To 2.7, and the relative viscosity of the nylon 6/66 copolymer is preferably 2.8 to 4.2, more preferably 2.8 to 3.7, and even more preferably 2.9 to 3.3. 5
【００１６】相対粘度ΔηｈとΔηｌの差が０．４未満
であると、捲縮性能に劣るものとなる。一方、相対粘度
ΔηｈとΔηｌの差が1.6を超えると、糸曲がりが大き
く製糸性が悪くなる。また、特に高粘度ポリアミドの粘
度範囲が上記の範囲を外れると高速紡糸時の製糸性が劣
ったり、捲縮性能が劣るため好ましくない。If the difference between the relative viscosities Δηh and Δηl is less than 0.4, the crimping performance will be poor. On the other hand, when the difference between the relative viscosities Δηh and Δηl exceeds 1.6, the yarn bending becomes large and the yarn-making properties deteriorate. Further, if the viscosity range of the high-viscosity polyamide is out of the above range, the spinning property at the time of high-speed spinning is inferior and the crimping performance is inferior.
【００１７】また、本発明の潜在捲縮糸は、高粘度ポリ
マーと低粘度ポリマーがサイドバイサイド型に貼り合わ
されたものであり、両成分の割合、貼り合わせ面の形状
は特に限定されるものではないが、質量比で高粘度ポリ
マー／低粘度ポリマーが３／１〜１／３程度とすること
が好ましい。そして、繊維の断面形状も丸断面のみなら
ず、各種の異形断面形状のものでもよい。The latently crimped yarn of the present invention is obtained by laminating a high-viscosity polymer and a low-viscosity polymer in a side-by-side manner, and the ratio of both components and the shape of the laminating surface are not particularly limited. However, the mass ratio of the high-viscosity polymer / low-viscosity polymer is preferably about 3/1 to 1/3. The cross-sectional shape of the fiber is not limited to a round cross-section, but may be various irregular cross-sectional shapes.
【００１８】そして、本発明の潜在捲縮糸は、ストレッ
チ性の良好な布帛を得るために、潜在捲縮が発現したと
きの捲縮率が２０％以上であることが必要であり、好ま
しくは３０％以上、さらに好ましくは４０％以上であ
る。捲縮率が２０％未満であると、布帛にした際にスト
レッチ性に劣るものとなる。The latently crimped yarn of the present invention needs to have a crimping ratio of 20% or more when latently crimped, in order to obtain a fabric having good stretchability, and is preferably used. It is at least 30%, more preferably at least 40%. If the crimp ratio is less than 20%, the fabric becomes poor in stretchability.
【００１９】なお、高粘度ポリアミドと低粘度ポリアミ
ドの相対粘度差を前記範囲内で変更すれば、ある程度捲
縮率を調整することができる。If the relative viscosity difference between the high-viscosity polyamide and the low-viscosity polyamide is changed within the above range, the crimp ratio can be adjusted to some extent.
【００２０】さらに、本発明の潜在捲縮糸は、弾性率が
７０％以上であることが必要であり、好ましくは７５
％、さらに好ましくは８０％以上である。本発明でいう
弾性率は繊維としての弾性率であるが、この値が７０％
未満であると、得られる布帛はストレッチ性、すなわ
ち、伸びる力と戻る力の乏しいものとなる。Further, the latently crimped yarn of the present invention needs to have an elastic modulus of 70% or more, preferably 75% or more.
%, More preferably 80% or more. The elastic modulus in the present invention is an elastic modulus of a fiber, and this value is 70%.
If less, the resulting fabric will have poor stretchability, ie, poor stretch and return forces.
【００２１】ここで、本発明でいう捲縮率と弾性率とは
以下のようにして測定したものである。潜在捲縮糸を繊
度測定用検尺器にて５回カセ取りを行い２重のループに
し、１／６０００ｇ／ｄの荷重をかけた状態で沸騰水中
に３０分間浸漬した後取り出し、その状態で３０分間風
乾し、その後、荷重を１／５００ｇ／ｄに変更して長さ
Ａを測定し、次に荷重１／２０ｇ／ｄをかけて長さＢを
求め、次の式で算出するものである。 捲縮率（％）＝〔（Ｂ−Ａ）／Ｂ〕×１００Here, the crimp rate and the elastic modulus in the present invention are measured as follows. The latent crimped yarn was scabbed five times with a fineness measuring scale to form a double loop, immersed in boiling water for 30 minutes under a load of 1/6000 g / d, and then taken out. Air-dry for 30 minutes, then change the load to 1/500 g / d, measure length A, then apply load 1/20 g / d to determine length B, and calculate with the following formula. is there. Crimp rate (%) = [(BA) / B] × 100
【００２２】次に、弾性率は、捲縮率を測定した糸条を
１０分間以上放置した後、荷重を１／５００ｇ／ｄをか
けて長さCを測定し、次式で算出するものである。 弾性率（％）＝〔（Ｂ−C）／（Ｂ−Ａ）〕×１００Next, the modulus of elasticity is calculated by the following formula by measuring the length C by applying a load of 1/500 g / d after leaving the yarn for which the crimp rate has been measured for 10 minutes or more. is there. Elastic modulus (%) = [(BC) / (BA)] × 100
【００２３】また、本発明の潜在捲縮糸は熱水収縮率が
３〜２５％であることが必要であり、好ましくは５〜１
５％である。熱水収縮率を３％未満にするには、高温の
熱処理が必要で高粘度ポリマー自身の熱水収縮率が低下
し、捲縮率が低下し、好ましくない。一方、熱水収縮率
が２５％を超えると、布帛にしてからの熱処理において
熱収縮する割合が大きく、得られる布帛は伸縮性がな
く、ストレッチ性に劣るものとなる。The latently crimped yarn of the present invention must have a hot water shrinkage of 3 to 25%, preferably 5 to 1%.
5%. In order to reduce the hot water shrinkage to less than 3%, a high-temperature heat treatment is required, and the hot water shrinkage of the high-viscosity polymer itself decreases, and the crimping rate decreases, which is not preferable. On the other hand, when the hot water shrinkage exceeds 25%, the rate of heat shrinkage in the heat treatment after forming the fabric is large, and the obtained fabric has no stretchability and is inferior in stretchability.
【００２４】本発明の潜在捲縮糸の捲縮が発現するメカ
ニズムは明らかではないが、低粘度側及び高粘度側の両
サイド間での物性値の差により捲縮が発現すると考えら
れる。そして、捲縮率と弾性率はサイドバイサイドに貼
り合わせたポリマーの特性の違いにより生じる捲縮及び
弾性であり、得られる布帛のストレッチ性に寄与するも
のである。熱水収縮率は繊維全体の長手方向の収縮を示
すものであるが、これも得られる布帛のストレッチ性に
寄与するものである。これらの物性値が上記の範囲内と
なることで、得られる布帛はストレッチ性に優れたもの
となる。The mechanism by which the latently crimped yarn of the present invention develops a crimp is not clear, but it is considered that the crimp develops due to the difference in physical property values between the low viscosity side and the high viscosity side. The crimp rate and the elastic modulus are the crimp and elasticity caused by the difference in the properties of the polymer bonded side-by-side, and contribute to the stretchability of the obtained fabric. The hot water shrinkage ratio indicates the shrinkage of the entire fiber in the longitudinal direction, and also contributes to the stretchability of the obtained fabric. When these physical property values fall within the above ranges, the resulting fabric has excellent stretchability.
【００２５】さらに、これらの物性値を制御し、十分な
捲縮を発現させるためには、２種類のポリアミドの複屈
折率をある特定の範囲内に制御することが非常に重要で
あることを本発明者らは見いだした。Furthermore, it is very important to control the birefringence of the two kinds of polyamides within a specific range in order to control these physical properties and to exhibit sufficient crimp. The present inventors have found.
【００２６】すなわち、高粘度ポリアミドと低粘度ポリ
アミドの複屈折率の差を０．００３〜０．０２５とする
ことが好ましく、さらに好ましくは０．００５〜０．０
２０とする。さらに、低粘度ポリアミドの複屈折率は
０．０２０以上とすることが好ましく、さらに好ましく
は０．０２０〜０．０５０、より好ましくは０．０２５
〜０．０４５とする。低粘度ポリアミドの複屈折率が
０．０２０未満であると、得られる糸条の強度や捲縮応
力が低くなり、捲縮性能が劣り、布帛に十分なストレッ
チ性を発現させることが困難となる。一方、高粘度ポリ
アミドの複屈折率は０．０３０〜０．０６０が好まし
く、さらに好ましくは０．０３５〜０．０５５である。That is, the difference in birefringence between the high-viscosity polyamide and the low-viscosity polyamide is preferably 0.003 to 0.025, more preferably 0.005 to 0.025.
20. Further, the birefringence of the low-viscosity polyamide is preferably 0.020 or more, more preferably 0.020 to 0.050, more preferably 0.025 to 0.025.
To 0.045. If the birefringence of the low-viscosity polyamide is less than 0.020, the strength and crimp stress of the obtained yarn will be low, the crimp performance will be poor, and it will be difficult to develop sufficient stretchability in the fabric. . On the other hand, the birefringence of the high-viscosity polyamide is preferably from 0.030 to 0.060, and more preferably from 0.035 to 0.055.
【００２７】複屈折率をこれら特定の範囲内に制御した
場合には、両サイドの複屈折率のバランスが好適なもの
となり、捲縮率、熱水収縮率、捲縮応力等が最適化され
るため、織物としたときに、織組織からくる拘束力に打
ち勝ち、十分なストレッチ性を発現することが可能とな
る。一方、複屈折率差を好適な範囲に制御できない場合
は、繊維の強度、捲縮応力が低くなり、捲縮率も小さく
なるため、布帛に十分なストレッチ性を発現させること
が困難となりやすい。When the birefringence is controlled within these specific ranges, the balance of the birefringence on both sides becomes favorable, and the crimp rate, hot water shrinkage rate, crimp stress and the like are optimized. Therefore, when it is made into a woven fabric, it is possible to overcome the restraining force coming from the woven structure and express sufficient stretchability. On the other hand, when the difference in birefringence cannot be controlled within a suitable range, the strength and crimp stress of the fiber are reduced, and the crimp ratio is also reduced.
【００２８】さらに、本発明の潜在捲縮糸の捲縮応力
は、0.005cN/dtex以上であることが好ましく、さらに好
ましくは0.007cN/dtex、より好ましくは0.01cN/dtexで
ある。この値が0.005cN/dtex未満では、特に織物、編
物、不織布等にしたときに十分な捲縮が発現されにく
く、本発明の目的である十分に満足できるストレッチ性
を有する布帛を得ることが困難となりやすい。Further, the crimp stress of the latently crimped yarn of the present invention is preferably at least 0.005 cN / dtex, more preferably 0.007 cN / dtex, and even more preferably 0.01 cN / dtex. When the value is less than 0.005 cN / dtex, it is difficult to obtain a sufficient crimp especially in fabrics, knits, and nonwoven fabrics, and it is difficult to obtain a fabric having a sufficiently satisfactory stretch property which is the object of the present invention. It is easy to be.
【００２９】また、本発明の潜在捲縮糸の強度は３．０
cN/dtex以上であることが好ましく、さらに好ましくは
３．５cN/dtex以上である。強度が３．０cN/dtex未満で
は、原糸製造工程において毛羽、糸切れとなりやすく、
また高次加工工程の仮撚加工時にも糸切れが多発し、操
業性が低下しやすい。また製織し染色仕上げ加工した布
帛の引裂き強度も低下しやすい。The latent crimped yarn of the present invention has a strength of 3.0.
It is preferably at least cN / dtex, more preferably at least 3.5 cN / dtex. If the strength is less than 3.0 cN / dtex, fluff and yarn breakage are likely in the yarn production process,
In addition, yarn breakage frequently occurs during false twisting in a high-order processing step, and operability is likely to be reduced. In addition, the tear strength of the woven and dyed-finished fabric tends to decrease.
【００３０】そして、本発明の潜在捲縮糸の伸度は、２
０〜６０％とすることが好ましく、さらに好ましくは３
０〜５０％である。伸度が２０％未満であると原糸製造
工程において、毛羽、糸切れとなりやすく、また高次加
工工程の仮撚加工時にも糸切れが多発し操業性が低下し
やすい。強度と伸度は相反する性質を有し、強度を高く
すると伸度が低下し、一方、伸度を高くすると強度が低
くなりすぎ、いずれも実用に適さなくなるので上記の範
囲内で、適宜最適範囲を選択する。The latently crimped yarn of the present invention has an elongation of 2
It is preferably set to 0 to 60%, more preferably 3 to 60%.
0 to 50%. If the elongation is less than 20%, fluff and yarn breakage are apt to occur in the raw yarn manufacturing process, and yarn breakage frequently occurs during false twisting in the high-order processing step, so that operability is likely to decrease. Strength and elongation have contradictory properties; increasing the strength lowers the elongation, while increasing the elongation lowers the strength too much, making them unsuitable for practical use. Select a range.
【００３１】さらに、本発明の潜在捲縮糸の単糸繊度
は、２dtex以上とすることが好ましく、さらに好ましく
は４dtex以上、より好ましくは６dtex以上である。単糸
繊度が２dtex未満では捲縮率及び捲縮応力が不十分とな
りやすく、特に織物、編物、不織布等にしたときにその
拘束力に打ち勝ち十分なストレッチ性を発現することが
困難となる。Further, the single yarn fineness of the latently crimped yarn of the present invention is preferably 2 dtex or more, more preferably 4 dtex or more, and more preferably 6 dtex or more. If the single yarn fineness is less than 2 dtex, the crimp rate and the crimp stress are likely to be insufficient, and it is difficult to overcome the restraining force, especially when fabricating a knitted fabric, a knitted fabric, or a nonwoven fabric, and to exhibit sufficient stretchability.
【００３２】本発明の潜在捲縮糸は織物、編物、不織布
等の布帛にすることができ、衣料用途、産業資材用途、
家庭資材、医療材料等に適したものである。また、本発
明の潜在捲縮糸は、上記のような布帛の一部にのみ使用
してもよい。The latently crimped yarn of the present invention can be made into a fabric such as a woven fabric, a knitted fabric, or a non-woven fabric.
It is suitable for household materials, medical materials and the like. Further, the latently crimped yarn of the present invention may be used only for a part of the above-described cloth.
【００３３】本発明の潜在捲縮糸において、前記した捲
縮率、熱水収縮率、弾性率、複屈折率、捲縮応力と強
度、伸度は密接な関係にあり、これらの全ての値が前述
した範囲のものとなることが好ましい。そして、このよ
うな本発明の潜在捲縮糸を製造する方法を次に説明す
る。In the latently crimped yarn of the present invention, the above-described crimp rate, hot water shrinkage rate, elastic modulus, birefringence, crimp stress, strength and elongation are closely related, and all of these values Is preferably in the range described above. Next, a method for producing such a latently crimped yarn of the present invention will be described.
【００３４】図１は、本発明の潜在捲縮糸の製造方法の
一実施態様を示す部分工程図である。本発明のサイドバ
イサイド型潜在捲縮糸は通常の複合紡糸型溶融紡糸装置
により製造することができる。粘度差を有する２種類の
ポリアミドをエクストルーダーにて加熱溶融した後、両
ポリアミドをサイドバイサイド型になるように合流さ
せ、紡糸口金の同一紡糸孔から吐出させて紡糸する。紡
糸温度は両ポリアミドによって適宜選択されるが、用い
るポリアミドの融点Ｔｍに対して、Ｔｍ＋１０〜Ｔｍ＋
８０℃の範囲内で選択されることが好ましい。FIG. 1 is a partial process diagram showing one embodiment of the method for producing a latently crimped yarn of the present invention. The side-by-side latently crimped yarn of the present invention can be produced by a conventional composite spinning type melt spinning apparatus. After two kinds of polyamides having different viscosities are heated and melted by an extruder, the two polyamides are merged so as to form a side-by-side type, and are discharged from the same spinning hole of a spinneret and spun. The spinning temperature is appropriately selected depending on both polyamides. Tm + 10 to Tm +
Preferably, it is selected within the range of 80 ° C.
【００３５】そして紡出された糸条を冷却固化し、油剤
を付与した後、引取ローラ１（第１ローラ）に引き取る
が、この引き取り速度は、本発明の潜在捲縮糸を得るの
に非常に重要である。粘度差を有する２種類のポリアミ
ドがサイドバイサイド型に吐出され、冷却固化する際、
両ポリマーの物性が異なる場合は、固化位置が異なると
考えられる。よって高粘度側が先に固化するために、低
粘度側に比べ高粘度側に紡糸張力が過剰にかかると考え
られ、よって高粘度側が低粘度側よりも高配向すること
になる。このような観点から好適な複屈折率を得るため
には、引き取りローラ速度は２０００〜５０００ｍ／分
が好ましく、さらに好ましくは２５００〜５０００ｍ／
分、より好ましくは３０００〜５０００ｍ／分である。After the spun yarn is cooled and solidified, an oil agent is applied, and the yarn is taken up by the take-up roller 1 (first roller). The take-up speed is very low for obtaining the latent crimped yarn of the present invention. Is important. When two types of polyamides having a viscosity difference are discharged in a side-by-side type and solidified by cooling,
When the physical properties of both polymers are different, the solidification positions are considered to be different. Therefore, it is considered that the spinning tension is excessively applied to the high-viscosity side as compared with the low-viscosity side because the high-viscosity side is solidified first, so that the high-viscosity side is more highly oriented than the low-viscosity side. From such a viewpoint, in order to obtain a suitable birefringence, the take-up roller speed is preferably 2000 to 5000 m / min, more preferably 2500 to 5000 m / min.
Min, more preferably 3000 to 5000 m / min.
【００３６】引き取り速度が２０００ｍ／分より小さい
と、紡糸張力が低いために両サイド間の複屈折率の差が
余り大きくならない。そのため延伸時の延伸張力が両サ
イドに均等近くにかかることとなり（すなわち両サイド
の複屈折率が増加する）、延伸後の複屈折率差を本発明
の好適な範囲に制御することが難しくなる。また、５０
００ｍ／分より大きいと、紡糸張力が高くなり、その高
い紡糸張力が高粘度側に過剰にかかるため、両サイドの
複屈折率差が大きくなりすぎる（すなわち高粘度側の複
屈折率が非常に大きく、低粘度側の複屈折率が非常に小
さくなる。）。このため、延伸時の延伸張力も高配向し
た高粘度側一方に過剰にかかるため、すなわち、高粘度
側の複屈折率が大きく増加し、延伸後の複屈折率差を本
発明の好適な範囲に制御することが難しくなる。If the take-up speed is less than 2000 m / min, the difference in the birefringence between the two sides does not become so large because the spinning tension is low. Therefore, the stretching tension at the time of stretching is evenly applied to both sides (that is, the birefringence of both sides increases), and it becomes difficult to control the birefringence difference after stretching to a preferable range of the present invention. . Also, 50
If it is larger than 00 m / min, the spinning tension becomes high, and the high spinning tension is excessively applied to the high viscosity side, so that the birefringence index difference between both sides becomes too large (that is, the birefringence index on the high viscosity side becomes very high). It is large and the birefringence on the low viscosity side is very small.) For this reason, the stretching tension at the time of stretching is also excessively applied to one of the highly oriented high-viscosity sides, that is, the birefringence on the high-viscosity side is greatly increased, and the difference in the birefringence after stretching is within the preferred range of the present invention. Control becomes difficult.
【００３７】そして、このときの引取ローラ１温度は１
００℃以下とすることが好ましく、さらに好ましくは３
０〜８０℃とし、５回程度掛けて引き取ることが好まし
い。ローラ温度が１００℃を超えるとローラ上での糸揺
れが大きくなり、操業性が悪化しやすい。The temperature of the take-off roller 1 at this time is 1
The temperature is preferably not higher than 00 ° C, more preferably 3 ° C.
The temperature is preferably set to 0 to 80 ° C., and it is preferable to take the product by taking about 5 times. When the roller temperature exceeds 100 ° C., the yarn sway on the roller increases, and the operability is likely to deteriorate.
【００３８】続いて、一旦巻き取ることなく連続して又
は一旦引き取った後、延伸及び熱処理を行う。すなわ
ち、本発明の製造方法においては、上記の引き取り速度
で引き取った繊維を一工程法及び二工程法のいずれで製
造してもよい。まず、一工程法の場合について説明す
る。第２ローラに７回程度掛けて引き取ることが好まし
く、延伸倍率は１．１〜２．５倍とし、好ましくは１．
２〜２．２倍、さらに好ましくは１．３〜１．８倍であ
る。そして、熱処理は、延伸と同時に行うことが好まし
く、第２ローラ２の温度を１２０〜２００℃、好ましく
は１２０〜１８０℃、さらに好ましくは１３０〜１６０
℃とする。Subsequently, the film is stretched and heat-treated continuously or once without being wound up. That is, in the manufacturing method of the present invention, the fiber drawn at the above-mentioned drawing speed may be manufactured by any of the one-step method and the two-step method. First, the case of the one-step method will be described. The second roller is preferably pulled about 7 times, and the stretching ratio is 1.1 to 2.5 times.
It is 2 to 2.2 times, and more preferably 1.3 to 1.8 times. The heat treatment is preferably performed simultaneously with the stretching, and the temperature of the second roller 2 is set to 120 to 200 ° C, preferably 120 to 180 ° C, and more preferably 130 to 160 ° C.
° C.
【００３９】引取りローラ１により特定の範囲内に複屈
折率が制御された糸条を、この延伸条件で延伸した場合
には、最終的に得られた糸条の高粘度側と低粘度側ポリ
アミドの複屈折率の差を０．００３〜０．０２５とする
ことができる。また、延伸倍率が１．１倍未満である
と、得られる繊維の強度が低いものとなり、２．５倍を
超えると、毛羽が発生し、延伸性が悪化する。When the yarn whose birefringence is controlled within a specific range by the take-off roller 1 is stretched under these stretching conditions, the high-viscosity side and low-viscosity side of the finally obtained yarn are obtained. The difference in the birefringence of the polyamide can be 0.003 to 0.025. On the other hand, if the stretching ratio is less than 1.1 times, the strength of the obtained fiber is low, and if it exceeds 2.5 times, fluff is generated and the stretchability is deteriorated.
【００４０】また、熱処理を行わない場合は、繊維自体
の熱水収縮率が大きくなるだけでなく、良好な巻き姿の
パッケージに巻き取ることができない。ローラ温度が１
２０℃未満であると繊維全体の熱水収縮率が大きくな
り、良好な巻き姿のパッケージに巻き取ることができな
くなり、２００℃を超えるとローラ上での糸揺れが大き
くなり、操業性が悪化する。Further, when the heat treatment is not performed, not only does the fiber itself have a large hot water shrinkage rate, but also it cannot be wound into a package having a good winding shape. Roller temperature is 1
If the temperature is lower than 20 ° C, the hot water shrinkage rate of the whole fiber becomes large, and it becomes impossible to wind up the package in a good winding form. If the temperature exceeds 200 ° C, the yarn sway on the roller becomes large, and the operability is deteriorated. I do.
【００４１】続いて、巻き取り可能となるように適宜弛
緩処理を施した後、巻取機３で巻き取る。ここで、高捲
縮性能を得るためには、延伸熱処理される第２ローラ上
で適当な張力がかかっていることが好ましい。そのため
には、第２ローラと巻取機間の張力が０．０５〜２．０
ｇ／ｄとなるように条件を選択して巻き取ることが好ま
しい。この際、第２ローラ上の張力を調整するために、
第２ローラと巻取機の間に第３ローラを設けてもよい。Subsequently, after appropriately performing a relaxation treatment so that the film can be wound, the film is wound by the winder 3. Here, in order to obtain high crimping performance, it is preferable that an appropriate tension is applied on the second roller to be subjected to the stretching heat treatment. For that purpose, the tension between the second roller and the winder is 0.05 to 2.0.
It is preferable to wind the film by selecting conditions so as to obtain g / d. At this time, in order to adjust the tension on the second roller,
A third roller may be provided between the second roller and the winder.
【００４２】次に、二工程法について説明する。引き取
りローラ速度２０００〜５０００ｍ／分で引き取った糸
条を一旦巻き取った後、延伸、熱処理を施す。なお、本
発明の製造方法においては、二工程法において先に述べ
た一工程法で延伸、熱処理された糸条にさらに延伸及び
／又は熱処理を施すものでもよい。したがって、この場
合、延伸は延伸倍率がトータルとして１．１倍以上であ
ればよく、二工程法においては延伸倍率が１．１未満で
もよい。また、熱処理も一工程法で１２０〜２００℃で
十分に施されている場合は、１２０℃以下であってもよ
い。Next, the two-step method will be described. After the yarn that has been taken up at a take-up roller speed of 2000 to 5000 m / min is once wound up, it is stretched and heat-treated. In the production method of the present invention, the yarn that has been drawn and heat-treated by the one-step method described above in the two-step method may be further subjected to drawing and / or heat treatment. Therefore, in this case, the stretching may be at least 1.1 times in total, and may be less than 1.1 in the two-step method. Further, when the heat treatment is sufficiently performed at 120 to 200 ° C. by the one-step method, the heat treatment may be performed at 120 ° C. or lower.
【００４３】二工程法で延伸、熱処理を施す場合につい
て説明する。例えば、延伸ピンに捲き、第１ローラで引
き取る間に１．１〜２．５倍の延伸を行い、第１ローラ
と第２ローラ間にヒートプレートを設置してヒートプレ
ートと第２ローラで温度１２０〜２００熱処理を行い、
巻き取る方法等が挙げられる。そして、このような熱処
理工程においては熱処理を十分に行うためには、弛緩熱
処理とすることが好ましい。A case where stretching and heat treatment are performed in a two-step method will be described. For example, it is wound around a stretching pin, stretched 1.1 to 2.5 times while being taken up by the first roller, a heat plate is set between the first roller and the second roller, and the temperature is increased by the heat plate and the second roller. Perform 120-200 heat treatment,
A winding method may be used. In such a heat treatment step, it is preferable to use a relaxation heat treatment in order to sufficiently perform the heat treatment.
【００４４】また、本発明の捲縮糸においては、このよ
うな一工程法又は二工程法で得られた繊維に撚り回数10
00〜2000回／ｍの撚りをかけて用いてもよい。そして、
本発明の潜在捲縮糸は、以上のような製造工程における
熱処理によっては潜在捲縮は発現せず、後加工により別
途熱処理することによって捲縮が発現するものである。
そこで、本発明の繊維は織物、編物、不織布等にするこ
とができるが、このような布帛にした後、精練、染色、
ＦＩＸ（余分な染料の除去）処理等の工程において７０
〜１００℃の熱水処理を施すことによって、捲縮を発現
させることが好ましい。In the crimped yarn of the present invention, the fiber obtained by such a one-step method or a two-step method is twisted 10 times.
Twist of 00 to 2000 times / m may be used. And
The latently crimped yarn of the present invention does not exhibit latent crimp by the heat treatment in the above-described production process, but develops crimp when separately heat-treated by post-processing.
Therefore, the fibers of the present invention can be woven, knitted, non-woven fabrics, etc., after such a fabric, scouring, dyeing,
70 in processes such as FIX (removal of excess dye)
It is preferable to perform crimping by performing hot water treatment at 100 ° C.
【００４５】[0045]
【実施例】次に、本発明を実施例により具体的に説明す
る。なお、実施例における各物性値の測定及び評価は、
次のように行った。 （ａ）相対粘度 ９６％硫酸を溶媒とし、濃度１ｇ／ｄｌ、温度２５℃で
測定した。 （ｂ）強伸度 島津製作所製オートグラフＡＧＳー５Ｇ型を用いて、Ｊ
ＩＳ Ｌ １０１３に準じて測定した。 （ｃ）熱水収縮率 糸条を５０ｃｍのループにし、１／３０ｇ／ｄの初荷重
をかけて長さＡを求め、次いでフリーにして沸騰水中に
１５分間浸漬した後、自然乾燥し、再び１／３０ｇ／ｄ
の荷重をかけて長さＢを求め、次の式で算出した。 熱水収縮率（％）＝〔（Ａ−Ｂ）／Ａ〕×１００ （ｄ）捲縮率 前記の方法で測定した。 （ｅ）弾性率 前記の方法で測定した。 （ｆ）捲縮応力 検尺機にて５回かせ取りした後、かせ取りを二重にして
糸条を５０ｃｍのループにする。次に１／6000（g／d）
の荷重をかけて沸騰水中で３０分間熱処理し、風乾後に
島津製作所社製オートグラフＡＧＳ−５０Ｄ型を用い、
速度100ｍｍ／分で上限値Ｈ（ｃＮ）までＳ−Ｓ曲線を
描いた後、図4に示す回復曲線に対して、横軸と読み取
り角度（θ）で直線を引き、交点の強力Ｆ（ｃＮ）を読
み取り、その値を〔繊度（dtex）×２０〕で除して捲縮
応力（ｃＮ／dtex）とする。 ここで、上限値H（ｃＮ）＝0.9807×〔繊度（d）×５×
２×２〕／１０ 読み取り角度（θ）＝ｔａｎ-1〔（繊度（d）×４）／
（測定フルスケール（ｃＮ）×0.9807）〕とする。 （ｇ）複屈折率 ＰＯＨ偏光顕微鏡を使用し、ベレックコンベンセーター
法にて測定する際、繊維表面上の重合体Ａ，Ｂの境界点
を結ぶ直線が光源方向に平行になるように置き（図
２）、繊維断面方向の両端から境界までの長さをそれぞ
れｄ1、ｄ2（ｄ(繊維の直径)＝ｄ1＋ｄ2）としたとき、
その中点C1、C2での、繊径計算（図３）及びレタデーシ
ョンの測定から、重合体Ａ，Ｂの複屈折Δｎa,Δｎbを
計算する。 （ｈ）ストレッチ性 得られた潜在捲縮糸を経糸と緯糸に用い、ウオータージ
ェットルームにより、回転数７００ｒｐｍで、経糸密度
１１０本／２．５４ｃｍ、緯糸密度１１０本／２．５４
ｃｍで製織を行い、織物を得た。この織物を８０℃で２
０分精練を行い、続いて１００℃で３０分間染色を行っ
た。この織物の伸びる力と縮む力、いわゆる伸縮性を総
合して触感による官能評価で４段階で以下のように評価
した。 ◎・・・非常に優れる。 ○・・・優れる。 △・・・やや劣る。 ×・・・劣る。Next, the present invention will be described in detail with reference to examples. In addition, the measurement and evaluation of each physical property value in the examples are as follows.
The procedure was as follows. (A) Relative viscosity The relative viscosity was measured at a concentration of 1 g / dl and a temperature of 25 ° C. using 96% sulfuric acid as a solvent. (B) High elongation Using a Shimadzu Autograph AGS-5G,
It was measured according to IS L 1013. (C) Hot water shrinkage rate The yarn was formed into a loop of 50 cm, the length A was determined by applying an initial load of 1/30 g / d, then freed, immersed in boiling water for 15 minutes, air-dried, and dried again. 1 / 30g / d
Was applied to obtain the length B, which was calculated by the following equation. Hot water shrinkage rate (%) = [(AB) / A] × 100 (d) Crimp rate Measured by the method described above. (E) Elastic modulus Measured by the method described above. (F) Crimp stress After squeezing 5 times with a measuring machine, the skein is doubled and the yarn is formed into a loop of 50 cm. Next, 1/6000 (g / d)
Heat-treated in boiling water with a load of 30 minutes, and air-dried, using Shimadzu Autograph AGS-50D,
After drawing an SS curve up to the upper limit H (cN) at a speed of 100 mm / min, a straight line is drawn on the recovery curve shown in FIG. 4 with the horizontal axis and the reading angle (θ), and the strength F (cN ) Is read, and the value is divided by [fineness (dtex) × 20] to obtain a crimp stress (cN / dtex). Here, the upper limit value H (cN) = 0.9807 × [fineness (d) × 5 ×
2 × 2] / 10 reading angle (θ) = tan −1 [(fineness (d) × 4) /
(Measurement full scale (cN) × 0.9807)]. (G) Birefringence When using a POH polarization microscope and measuring by the Berek convention method, a straight line connecting the boundary points of the polymers A and B on the fiber surface is placed parallel to the light source direction ( FIG. 2), when the lengths from both ends in the fiber cross section direction to the boundary are d 1 and d 2 (d (diameter of fiber) = d 1 + d 2 ),
The birefringence Δna and Δnb of the polymers A and B are calculated from the fiber diameter calculation (FIG. 3) and the measurement of the retardation at the midpoints C 1 and C 2 . (H) Stretchability The obtained latent crimped yarn is used for the warp and the weft, and the warp density is 110 / 2.54 cm and the weft density 110 / 2.54 by a water jet loom at a rotation speed of 700 rpm.
cm, and a woven fabric was obtained. This fabric is baked at 80
The scouring was performed for 0 minutes, followed by dyeing at 100 ° C. for 30 minutes. The stretchability and shrinkage of the woven fabric, the so-called stretchability, were comprehensively evaluated in the following four grades by sensory evaluation based on tactile sensation. ◎ ・ ・ ・ Excellent.・ ・ ・: Excellent. Δ: Slightly inferior. ×: Inferior.
【００４６】実施例１ 低粘度ポリマーに相対粘度２．５０のナイロン６を用
い、高粘度ポリマーには相対粘度３．１０のナイロン６
を用いて常用の複合溶融紡糸装置にサイドバイサイド型
複合紡糸口金を装着し、低粘度ポリマーと高粘度ポリマ
ーとの複合比（質量比）を１：１として、ポリマー温度
２７０℃で溶融紡出した。この複合繊維を冷却し、油剤
を付与した後、速度３４１９ｍ／分、温度７０℃の第１
ローラに５回掛けて引き取り、引き続いて、速度４２７
４ｍ／分、温度１６０℃の第２ローラに７回掛けて、
１．２５倍に熱延伸した後、速度４１５０ｍ／分で巻取
機に巻き取り、５６dtex／１２ｆの丸断面形状の潜在捲
縮糸を得た。Example 1 Nylon 6 having a relative viscosity of 2.50 was used for a low-viscosity polymer, and Nylon 6 having a relative viscosity of 3.10 was used for a high-viscosity polymer.
And a side-by-side composite spinneret was attached to a conventional composite melt spinning apparatus, and the composite ratio (mass ratio) of the low-viscosity polymer and the high-viscosity polymer was set to 1: 1 and melt-spun at a polymer temperature of 270 ° C. After cooling the composite fiber and applying the oil agent, the first fiber at a speed of 3419 m / min and a temperature of 70 ° C.
The roller is picked up five times, followed by a speed of 427.
It is applied to the second roller of 4 m / min and the temperature of 160 ° C. seven times,
After hot stretching by 1.25 times, it was wound around a winder at a speed of 4150 m / min to obtain a latent crimped yarn having a round cross-sectional shape of 56 dtex / 12f.
【００４７】実施例２ 第１ローラの速度を３０７７ｍ／分、第２ローラの速度
を４１５４ｍ／分、巻取速度を４０５０ｍ／分とし、７
８dtex／１２ｆの潜在捲縮糸を得た以外は実施例１と同
様に行った。Example 2 The speed of the first roller was 3077 m / min, the speed of the second roller was 4154 m / min, and the winding speed was 4050 m / min.
The procedure was performed in the same manner as in Example 1 except that a latently crimped yarn of 8 dtex / 12f was obtained.
【００４８】実施例３ 第１ローラの速度を２８１８ｍ／分、第２ローラの速度
を４０９０ｍ／分、巻取速度を３９７０ｍ／分とし、１
１０dtex／１２ｆの潜在捲縮糸を得た以外は実施例１と
同様に行った。Example 3 The speed of the first roller was 2818 m / min, the speed of the second roller was 4090 m / min, and the winding speed was 3970 m / min.
The procedure was performed in the same manner as in Example 1 except that a latently crimped yarn of 10 dtex / 12f was obtained.
【００４９】実施例４ 第１ローラの温度を６０℃、延伸倍率を１．２０倍、第
１ローラの速度を４２００ｍ／分、第２ローラの速度を
５０５０ｍ／分、巻取速度５０００ｍ／分とし、７８dt
ex／１２ｆの潜在捲縮糸を得た以外は実施例１と同様に
行った。Example 4 The temperature of the first roller was 60 ° C., the stretching ratio was 1.20 times, the speed of the first roller was 4200 m / min, the speed of the second roller was 5050 m / min, and the winding speed was 5000 m / min. , 78dt
The same procedure was performed as in Example 1 except that an ex / 12f latent crimped yarn was obtained.
【００５０】実施例５ 第１ローラの温度を６０℃、延伸倍率を１．１２倍、第
１ローラの速度を４８００ｍ／分、第２ローラの速度を
５３７６ｍ／分、巻取速度５０００ｍ／分とし、７８dt
ex／１２ｆの潜在捲縮糸を得た以外は実施例１と同様に
行った。Example 5 The temperature of the first roller was 60 ° C., the stretching ratio was 1.12 times, the speed of the first roller was 4800 m / min, the speed of the second roller was 5376 m / min, and the winding speed was 5000 m / min. , 78dt
The same procedure was performed as in Example 1 except that an ex / 12f latent crimped yarn was obtained.
【００５１】実施例６ 低粘度ポリマーに相対粘度２．５０のナイロン６を用
い、高粘度ポリマーには相対粘度３．１０のナイロン６
／６６共重合体（ナイロン６６の共重合量が１５モル
％）を用いて常用の複合溶融紡糸装置にサイドバイサイ
ド型複合紡糸口金を装着し、低粘度ポリマーと高粘度ポ
リマーとの複合比（質量比）を１：１として、ポリマー
温度２７０℃で溶融紡出した。この複合繊維を冷却し、
油剤を付与した後、速度３０７７ｍ／分、温度７０℃の
第１ローラに５回掛けて引き取り、引き続いて、速度４
１５４ｍ／分、温度１６０℃の第２ローラに７回掛け
て、１．３５倍に熱延伸した後、速度４０００ｍ／分で
巻取機に巻き取り、５０ｄ／１２ｆの丸断面形状の潜在
捲縮糸を得た。Example 6 Nylon 6 having a relative viscosity of 2.50 was used for the low-viscosity polymer, and Nylon 6 having a relative viscosity of 3.10 was used for the high-viscosity polymer.
/ 66 copolymer (the copolymerization amount of nylon 66 is 15 mol%), a side-by-side type composite spinneret is attached to a conventional composite melt spinning apparatus, and the composite ratio (mass ratio) of the low-viscosity polymer and the high-viscosity polymer is adjusted. ) Was melt spun at a polymer temperature of 270 ° C. Cool this composite fiber,
After the oil agent was applied, the oil was applied to the first roller at a speed of 3077 m / min and a temperature of 70 ° C. for 5 times to take it off.
After applying the heat to the second roller at 154 m / min and the temperature of 160 ° C. seven times and stretching the film to 1.35 times, it is wound around a winder at a speed of 4000 m / min, and has a latent crimp having a round cross section of 50d / 12f. Yarn was obtained.
【００５２】実施例７ 第１ローラの速度を３７４５ｍ／分、第２ローラの速度
を４４９５ｍ／分、巻取速度を４３５０ｍ／分とし、７
８dtex／１２ｆの潜在捲縮糸を得た以外は実施例６と同
様に行った。Example 7 The speed of the first roller was 3745 m / min, the speed of the second roller was 4495 m / min, and the winding speed was 4350 m / min.
The procedure was performed in the same manner as in Example 6 except that a latently crimped yarn of 8 dtex / 12f was obtained.
【００５３】実施例８ 第１ローラの速度を３４１９ｍ／分、第２ローラの速度
を４２７４ｍ／分、巻取速度を４１３０ｍ／分とし、１
１０dtex／１２ｆの潜在捲縮糸を得た以外は実施例６と
同様に行った。Example 8 The speed of the first roller was 3419 m / min, the speed of the second roller was 4274 m / min, and the winding speed was 4130 m / min.
The procedure was performed in the same manner as in Example 6 except that a latently crimped yarn of 10 dtex / 12f was obtained.
【００５４】実施例９ 第１ローラの温度を50℃、延伸倍率を１．２倍、第１ロ
ーラの速度を４２００ｍ／分、第２ローラの速度を５０
５０ｍ／分、巻取速度５０００ｍ／分とし、７８dtex／
１２ｆの潜在捲縮糸を得た以外は実施例６と同様に行っ
た。Example 9 The temperature of the first roller was 50 ° C., the stretching ratio was 1.2 times, the speed of the first roller was 4200 m / min, and the speed of the second roller was 50.
50 m / min, winding speed 5000 m / min, 78 dtex /
The same operation as in Example 6 was performed except that a latent crimped yarn of 12f was obtained.
【００５５】実施例１０ 第１ローラの温度を６０℃、延伸倍率を１．１２倍、第
１ローラの速度を４８００ｍ／分、第２ローラの速度を
５３７６ｍ／分、巻取速度５３２２ｍ／分とし、７８dt
ex／１２ｆの潜在捲縮糸を得た以外は実施例６と同様に
行った。Example 10 The temperature of the first roller was 60 ° C., the stretching ratio was 1.12 times, the speed of the first roller was 4800 m / min, the speed of the second roller was 5376 m / min, and the winding speed was 5322 m / min. , 78dt
The procedure was performed in the same manner as in Example 6, except that an ex / 12f latent crimped yarn was obtained.
【００５６】実施例１１ 第１ローラの温度を６０℃、延伸倍率を１．１０倍、第
１ローラの速度を５０００ｍ／分、第２ローラの速度を
５５００ｍ／分、巻取速度５４４５ｍ／分とし、７８dt
ex／１２ｆの潜在捲縮糸を得た以外は実施例６と同様に
行った。Example 11 The temperature of the first roller was 60 ° C., the stretching ratio was 1.10 times, the speed of the first roller was 5000 m / min, the speed of the second roller was 5500 m / min, and the winding speed was 5445 m / min. , 78dt
The procedure was performed in the same manner as in Example 6, except that an ex / 12f latent crimped yarn was obtained.
【００５７】実施例１２ 第１ローラの温度を５０℃、延伸倍率を１．２５倍、第
１ローラの速度を３１８１ｍ／分、第２ローラの速度を
３９７６ｍ／分、巻取速度４０００ｍ／分とし、７８dt
ex／１２ ｆの潜在捲縮糸を得た以外は実施例６と同
様に行った。この巻き取った潜在捲縮糸を以下に示す工
程で延伸、弛緩熱処理を行った。まず、延伸ピンに一回
捲きし、第1ローラ（常温）に引き取り、１．２倍に延
伸し、第２ローラ（１６５℃）との間にヒートプレート
（１８０℃）を設置して、弛緩率１．０％で熱処理して
巻き取った。Example 12 The temperature of the first roller was 50 ° C., the stretching ratio was 1.25 times, the speed of the first roller was 3181 m / min, the speed of the second roller was 3976 m / min, and the winding speed was 4000 m / min. , 78dt
The procedure was performed in the same manner as in Example 6 except that latently crimped yarn of ex / 12f was obtained. The wound latently crimped yarn was subjected to stretching and relaxation heat treatment in the following steps. First, it is wound once on a stretching pin, taken up by a first roller (room temperature), stretched 1.2 times, and a heat plate (180 ° C.) is set between the second roller (165 ° C.) and relaxed. It was heat-treated at a rate of 1.0% and wound up.
【００５８】比較例１ 第１ローラの速度を１７０５ｍ／分、第１ローラの温度
を５０℃、第２ローラの速度を３２４０ｍ／分、巻取速
度を３１００ｍ／分とした以外は実施例１と同様に行っ
た。Comparative Example 1 Example 1 was the same as Example 1 except that the speed of the first roller was 1705 m / min, the temperature of the first roller was 50 ° C., the speed of the second roller was 3240 m / min, and the winding speed was 3100 m / min. Performed similarly.
【００５９】比較例２ 高粘度ポリマーを相対粘度２．６０のナイロン６とした
以外は実施例２と同様に行った。Comparative Example 2 The same operation as in Example 2 was carried out except that the high-viscosity polymer was changed to nylon 6 having a relative viscosity of 2.60.
【００６０】比較例３ 第１ローラの速度を４２００ｍ／分、第２ローラの速度
を４８３０ｍ／分、第２ローラの温度（熱処理温度）を
１００℃、巻取速度を４６８０ｍ／分とした以外は実施
例１と同様に行った。Comparative Example 3 Except that the speed of the first roller was 4200 m / min, the speed of the second roller was 4830 m / min, the temperature of the second roller (heat treatment temperature) was 100 ° C., and the winding speed was 4680 m / min. Performed in the same manner as in Example 1.
【００６１】比較例４ 第１ローラの速度を１７０５ｍ／分、第１ローラの温度
を５０℃、第２ローラの速度を３２４０ｍ／分、巻取速
度を３１００ｍ／分とした以外は実施例４と同様に行っ
た。Comparative Example 4 Example 4 was repeated except that the speed of the first roller was 1705 m / min, the temperature of the first roller was 50 ° C., the speed of the second roller was 3240 m / min, and the winding speed was 3100 m / min. Performed similarly.
【００６２】比較例５ 高粘度ポリマーを相対粘度２．６０のナイロン６／６６
共重合体（ナイロン６６の共重合量が１５モル％）とし
た以外は実施例４と同様に行った。Comparative Example 5 Nylon 6/66 having a relative viscosity of 2.60 was prepared by using a high-viscosity polymer.
The procedure was carried out in the same manner as in Example 4 except that the copolymer (the copolymerization amount of nylon 66 was 15 mol%).
【００６３】比較例６ 第１ローラの速度を４２００ｍ／分、第２ローラの速度
を４８３０ｍ／分、第２ローラの温度（熱処理温度）を
１００℃、巻取速度を４６８０ｍ／分とした以外は実施
例４と同様に行った。Comparative Example 6 The speed of the first roller was 4200 m / min, the speed of the second roller was 4830 m / min, the temperature of the second roller (heat treatment temperature) was 100 ° C., and the winding speed was 4680 m / min. Performed in the same manner as in Example 4.
【００６４】比較例７ 高粘度ポリマーを相対粘度４．３のナイロン６／６６共
重合体（ナイロン６６の共重合量が１５モル％）とした
以外は実施例４と同様に行った。Comparative Example 7 The same operation as in Example 4 was carried out except that the high-viscosity polymer was a nylon 6/66 copolymer having a relative viscosity of 4.3 (the copolymerization amount of nylon 66 was 15 mol%).
【００６５】実施例１〜１２、比較例１〜７で得られた
繊維の強度、伸度、熱水収縮率、捲縮率、捲縮応力、高
粘度及び低粘度ポリアミドの複屈折率の測定結果、スト
レッチ性の評価結果を表１に示す。Measurement of strength, elongation, hot water shrinkage, crimp rate, crimp stress, and birefringence of high-viscosity and low-viscosity polyamides of the fibers obtained in Examples 1 to 12 and Comparative Examples 1 to 7. Table 1 shows the results of evaluation of the stretchability.
【００６６】[0066]
【表１】 [Table 1]
【００６７】表１から明らかなように、実施例１〜１２
の繊維は十分な捲縮性能を有し、強度、伸度等にも優
れ、製糸性も良好であり、得られた布帛はストレッチ性
に優れていた。一方、比較例１及び４の繊維は第１ロー
ラの速度が遅く、延伸倍率が高すぎたため、強度、伸度
は優れているが、複屈折率差が小さく、捲縮率の低い繊
維となった。比較例２及び５の繊維は、高粘度ポリマー
の相対粘度が低く、粘度差が小さかったため、複屈折率
差も小さく、弾性率の低い繊維となった。また、比較例
３及び６の繊維は、第２ローラの温度（熱処理温度）が
低すぎたため、熱水収縮率が高い繊維となった。比較例
７では高粘度ポリマーの相対粘度が高く、粘度差が大き
かったため、紡糸時に糸曲がりが大きく、製糸性が悪化
し、繊維を得ることができなかった。そして、比較例１
〜７の繊維から得られた布帛はいずれもストレッチ性に
劣るものであった。As is clear from Table 1, Examples 1 to 12
The fiber had sufficient crimping performance, excellent strength, elongation, etc., and good spinnability, and the obtained fabric had excellent stretchability. On the other hand, the fibers of Comparative Examples 1 and 4 have a low speed of the first roller and an excessively high stretching ratio, and thus have excellent strength and elongation, but have a small difference in birefringence and a low crimp ratio. Was. In the fibers of Comparative Examples 2 and 5, the relative viscosity of the high-viscosity polymer was low and the difference in viscosity was small, so that the difference in birefringence was small, and the fibers were low in elastic modulus. Further, the fibers of Comparative Examples 3 and 6 had high hot water shrinkage because the temperature of the second roller (heat treatment temperature) was too low. In Comparative Example 7, the relative viscosity of the high-viscosity polymer was high and the difference in viscosity was large, so that the yarn was greatly bent at the time of spinning, the spinning property was deteriorated, and fibers could not be obtained. And Comparative Example 1
All of the fabrics obtained from the fibers Nos. To 7 were inferior in stretchability.
【００６８】[0068]
【発明の効果】本発明のポリアミド潜在捲縮糸は、弾性
率が高く、熱水収縮率が適度であり、潜在を発現させた
ときの捲縮率が高いものであるため、織物、編物、不織
布等の布帛にすると、十分なストレッチ性を有する布帛
とすることができ、衣料用、産業資材用、家庭資材用、
衣料材料用等に好適に用いることができる。そして、本
発明のポリアミド潜在捲縮糸の製造方法によれば、操業
性よく、低コストで本発明のポリアミド潜在捲縮糸を得
ることができる。The latent latent crimped yarn of the present invention has a high modulus of elasticity, an appropriate degree of shrinkage in hot water, and a high degree of crimp when the latent is developed. When made into a fabric such as a non-woven fabric, it can be a fabric having a sufficient stretch property, for clothing, for industrial materials, for household materials,
It can be suitably used for clothing materials and the like. According to the method for producing a latently crimped polyamide yarn of the present invention, the latently crimped polyamide yarn of the present invention can be obtained with good operability at low cost.
【図１】本発明のポリアミド潜在捲縮糸の製造方法の一
実施態様を示す部分工程図である。FIG. 1 is a partial process diagram showing one embodiment of a method for producing a latently crimped polyamide yarn of the present invention.
【図２】本発明のポリアミド潜在捲縮糸の複屈折率の測
定方法を示す説明図である。FIG. 2 is an explanatory view showing a method for measuring the birefringence of a latent latent crimped yarn of the present invention.
【図３】本発明のポリアミド潜在捲縮糸の複屈折率の測
定方法を示す説明図である。FIG. 3 is an explanatory diagram showing a method for measuring the birefringence of a latent latent crimped yarn of the present invention.
【図４】本発明のポリアミド潜在捲縮糸の捲縮応力の測
定方法を示す説明図である。FIG. 4 is an explanatory view showing a method for measuring a crimp stress of a latent latent crimped yarn of the present invention.
１ 第１ローラ ２ 第２ローラ ３ 巻取機 DESCRIPTION OF SYMBOLS 1 1st roller 2 2nd roller 3 Winding machine
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 あずさ 京都府宇治市宇治戸ノ内５ ユニチカファ イバー株式会社宇治工場内 (72)発明者 田中 道子 京都府宇治市宇治戸ノ内５ ユニチカファ イバー株式会社宇治工場内 Ｆターム(参考） 4L041 AA08 AA09 AA19 AA20 AA25 BA02 BA05 BA09 BA59 BC05 BC17 BC20 BD11 BD20 CA21 CA29 DD01 DD04 DD08 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tanaka Azusa 5 Unitika Fiber Uji Tonouchi, Uji City, Kyoto Prefecture Unitika Fiber Co., Ltd. (72) Inventor Michiko Tanaka 5 Unitika Fiber Uji Tonouchi, Uji City, Kyoto Uji Plant F term (reference) 4L041 AA08 AA09 AA19 AA20 AA25 BA02 BA05 BA09 BA59 BC05 BC17 BC20 BD11 BD20 CA21 CA29 DD01 DD04 DD08
Claims (5)
イドバイサイド型に貼り合わせた繊維において、高粘度
ポリアミドと低粘度ポリアミドの相対粘度の差が（１）
式を満足し、かつ熱水収縮率が３〜２５％、捲縮率が２
０％以上、弾性率が７０％以上であることを特徴とする
ポリアミド潜在捲縮糸。 （１）０．４≦Δηｈ−Δηｌ≦１．６ ただし、Δηｈ：高粘度ポリアミドの相対粘度 Δηｌ：低粘度ポリアミドの相対粘度In a fiber obtained by laminating two kinds of polyamides having a difference in viscosity in a side-by-side type, a difference in relative viscosity between a high viscosity polyamide and a low viscosity polyamide is (1).
The formula is satisfied, and the hot water shrinkage rate is 3 to 25% and the crimp rate is 2
A latent latent crimped yarn having a modulus of 0% or more and an elastic modulus of 70% or more. (1) 0.4 ≦ Δηh−Δηl ≦ 1.6, where Δηh: relative viscosity of high viscosity polyamide Δηl: relative viscosity of low viscosity polyamide
イドバイサイド型に貼り合わせた繊維において、高粘度
ポリアミドと低粘度ポリアミドの複屈折率が （２）〜（３）式を満足する請求項１記載のポリアミド
潜在捲縮糸。 （２）０．００３≦ΔｎＨ−ΔｎＬ≦０．０２５ （３）０．０２０≦ΔｎＬ ただし、ΔｎＨ：高粘度ポリアミドの複屈折率 ΔｎＬ：低粘度ポリアミドの複屈折率2. A fiber obtained by laminating two kinds of polyamides having different viscosities in a side-by-side type, wherein the birefringence of the high-viscosity polyamide and the low-viscosity polyamide satisfies the formulas (2) to (3). Polyamide latent crimped yarn. (2) 0.003 ≦ ΔnH−ΔnL ≦ 0.025 (3) 0.020 ≦ ΔnL where ΔnH: birefringence of high viscosity polyamide ΔnL: birefringence of low viscosity polyamide
１又は２記載のポリアミド潜在捲縮糸。3. The latently crimped polyamide yarn according to claim 1, wherein both polyamides are nylon 6.
合体、低粘度ポリマーがナイロン６である請求項１又は
２記載のポリアミド潜在捲縮糸。4. The polyamide latent crimped yarn according to claim 1, wherein the high viscosity polymer is a nylon 6/66 copolymer and the low viscosity polymer is nylon 6.
イドバイサイド型の紡糸口金で溶融紡出し、冷却固化
し、油剤を付与した後、速度２０００〜５０００ｍ／分
のローラで引き取り、延伸倍率１．１〜２．５倍で延伸
し、温度１２０〜２００℃で熱処理を施すことを特徴と
する請求項１、２、３又は４記載のポリアミド潜在捲縮
糸の製造方法。5. A polyamide having two viscosities having different viscosities is melt-spun with a side-by-side spinneret, cooled and solidified, an oil agent is applied thereto, and then taken up by a roller having a speed of 2000 to 5000 m / min. The method for producing a latently crimped polyamide yarn according to any one of claims 1, 2, 3 and 4, wherein the drawing is performed by a factor of up to 2.5 times and a heat treatment is performed at a temperature of from 120 to 200 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001171170A JP2002363827A (en) | 2001-06-06 | 2001-06-06 | Latent crimping polyamide yarn and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001171170A JP2002363827A (en) | 2001-06-06 | 2001-06-06 | Latent crimping polyamide yarn and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002363827A true JP2002363827A (en) | 2002-12-18 |
Family
ID=19012981
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001171170A Pending JP2002363827A (en) | 2001-06-06 | 2001-06-06 | Latent crimping polyamide yarn and method for producing the same |
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| Country | Link |
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| JP (1) | JP2002363827A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080717A (en) * | 2012-09-29 | 2014-05-08 | Kb Seiren Ltd | Polyamide latent crimp yarn and its manufacturing method |
| CN109208119A (en) * | 2017-06-30 | 2019-01-15 | 东丽纤维研究所（中国）有限公司 | A kind of polyamide compound fibre |
| JP2020111840A (en) * | 2019-01-08 | 2020-07-27 | 東レ株式会社 | Latent crimped yarn |
| WO2021020354A1 (en) | 2019-07-31 | 2021-02-04 | 東レ株式会社 | Polyamide composite fiber and finished yarn |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945724B1 (en) * | 1966-02-17 | 1974-12-05 | ||
| JPS6028514A (en) * | 1983-04-11 | 1985-02-13 | モンサント・コンパニ− | Torque free filament |
-
2001
- 2001-06-06 JP JP2001171170A patent/JP2002363827A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945724B1 (en) * | 1966-02-17 | 1974-12-05 | ||
| JPS6028514A (en) * | 1983-04-11 | 1985-02-13 | モンサント・コンパニ− | Torque free filament |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080717A (en) * | 2012-09-29 | 2014-05-08 | Kb Seiren Ltd | Polyamide latent crimp yarn and its manufacturing method |
| CN109208119A (en) * | 2017-06-30 | 2019-01-15 | 东丽纤维研究所（中国）有限公司 | A kind of polyamide compound fibre |
| JP2020111840A (en) * | 2019-01-08 | 2020-07-27 | 東レ株式会社 | Latent crimped yarn |
| JP7263778B2 (en) | 2019-01-08 | 2023-04-25 | 東レ株式会社 | latent crimp yarn |
| WO2021020354A1 (en) | 2019-07-31 | 2021-02-04 | 東レ株式会社 | Polyamide composite fiber and finished yarn |
| KR20220038683A (en) | 2019-07-31 | 2022-03-29 | 도레이 카부시키가이샤 | Polyamide Composite Fibers and Processed Yarns |
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