JP2866190B2 - Method for producing mixed fiber having different elongation - Google Patents
Method for producing mixed fiber having different elongationInfo
- Publication number
- JP2866190B2 JP2866190B2 JP32307890A JP32307890A JP2866190B2 JP 2866190 B2 JP2866190 B2 JP 2866190B2 JP 32307890 A JP32307890 A JP 32307890A JP 32307890 A JP32307890 A JP 32307890A JP 2866190 B2 JP2866190 B2 JP 2866190B2
- Authority
- JP
- Japan
- Prior art keywords
- elongation
- discharge hole
- mixed fiber
- difference
- spinneret
- 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 - Lifetime
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- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、伸度差を有する混繊糸の製造方法に関し、
さらに詳しくは伸度差の大きい紡糸混繊糸の製造方法に
関する。The present invention relates to a method for producing a mixed fiber having a difference in elongation,
More specifically, the present invention relates to a method for producing a spun mixed fiber having a large difference in elongation.
近年、いわゆる“新合繊”が市場をにぎわしている
が、最近の素材の開発方向として、天然繊維を模倣する
のではなく、合成繊維の特徴をより発揮していくという
試みが主体となっている。混繊糸の内容もそれに伴い大
きく変化し、例えば伸度が250〜350％の低紡速未延伸糸
と、伸度が100〜160％の中紡速未延伸糸の組合せで延伸
混繊するということも企業化されている。In recent years, the so-called “new synthetic fiber” has been flourishing in the market, but as a recent development direction of materials, attempts are being made not to imitate natural fibers but to make use of the characteristics of synthetic fibers. . The content of the mixed yarn also changes greatly, for example, drawing and mixing with a combination of a low spinning speed undrawn yarn having an elongation of 250 to 350% and a medium spinning speed undrawn yarn having an elongation of 100 to 160%. This has also been commercialized.
この技術は、延伸混繊による技術であるため、より合
理的な製造方法、すなわち紡糸段階でこのような大きい
伸度差を得る紡糸混繊の開発が要望されていた。Since this technique is a technique based on drawing and blending, development of a more rational production method, that is, a spinning blended fiber that can obtain such a large difference in elongation at the spinning stage has been demanded.
このための技術として、例えば特願昭59−114399号公
報には、特殊なピンを用いて大きな伸度差を取り出すこ
とが記載されている。As a technique for this, for example, Japanese Patent Application No. 59-114399 describes that a large difference in elongation is taken out using a special pin.
この方法によると、有用な伸度差が得られる反面、ピ
ンの精度、装着時の安定性など生産管理面での課題があ
り、より簡便な方法、例えばピンを使わないで単なる口
金だけで可能な技術が望まれていた。According to this method, a useful elongation difference can be obtained, but there are problems in production management such as pin accuracy and stability at the time of mounting, and it is possible to use a simpler method, for example, just using a base without using a pin Technology was desired.
ピンを使わない方法としては、紡糸口金、パックを突
き出して冷却する方法、あるいは口金面内で各孔間に突
き出しの差をつけ、口金面内の温度差による伸度アップ
の試みもなされている。As methods that do not use pins, there have been attempts to cool the spinnerets and packs by protruding them, or to increase the degree of elongation due to the temperature difference in the surface of the die by making the difference in protrusion between the holes in the die surface. .
しかしながら、単なる冷却差だけでは、口金面が冷え
て紡糸性が低下するだけでなく、肝心の伸度差もそれほ
どつかないのが実態であった。However, a simple cooling difference not only reduced the spinnability due to the cooling of the spinneret surface, but also did not make a significant difference in elongation.
本発明は、単一ポリマーで、伸度差が充分大き
く、紡糸時の糸切れが少ない、紡糸混繊糸の製造方法
を提供することを目的とする。An object of the present invention is to provide a method for producing a spun mixed fiber, which is a single polymer and has a sufficiently large difference in elongation and little breakage during spinning.
本発明は、溶融ポリマーが吐出される吐出孔面の位置
が異なる複数の吐出孔面を有する紡糸口金を用いて混繊
糸を得る方法において、該複数の吐出孔面の中で下部に
位置する吐出孔面に、少なくとも断面積が連続的に拡大
する吐出孔を設置した紡糸口金を用いることを特徴とす
る、伸度差を有する混繊糸の製造方法である。The present invention relates to a method for obtaining a mixed fiber using a spinneret having a plurality of discharge hole surfaces at which the position of a discharge hole surface from which a molten polymer is discharged is located at a lower position among the plurality of discharge hole surfaces. A method for producing a mixed fiber having a difference in elongation, wherein a spinneret having at least a discharge hole whose cross-sectional area continuously increases is provided on a discharge hole surface.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
ポリマーの溶融温度あるいは紡糸口金温度を下げる
と、吐出孔より吐出される重合体の溶融粘度が大きくな
り、伸長応力が大きくなり、その結果、同一紡速で巻き
取っても伸度が低下するのは公知のことである。When the melting temperature of the polymer or the spinneret temperature is lowered, the melt viscosity of the polymer discharged from the discharge hole increases, and the elongation stress increases. As a result, the elongation decreases even when wound at the same spinning speed. Is known.
しかしながら、さらに温度を下げていくと弱糸になり
最後には断糸となるため、通常の吐出孔を用いた場合
は、得られる繊維の伸度およびパフォーマンスの観点か
ら限界があった。そこで、温度を下げても弱糸になりに
くい方向について鋭意検討した結果、孔径の大きい吐出
孔の方が弱糸になりにくいことがわかった。しかし、こ
の場合、単に孔径のみを大きくすると、吐出孔内を流れ
るポリマーの背圧が不充分となり、その結果、吐出斑が
生じるという問題があった。However, when the temperature is further lowered, the yarn becomes weak and finally breaks. Therefore, when a normal discharge hole is used, there is a limit in terms of elongation and performance of the obtained fiber. Therefore, as a result of intensive studies on the direction in which the yarn is unlikely to become a weak yarn even when the temperature is lowered, it has been found that a discharge hole having a large hole diameter is less likely to become a weak yarn. However, in this case, if only the diameter of the hole is simply increased, the back pressure of the polymer flowing in the discharge hole becomes insufficient, and as a result, there is a problem that uneven discharge occurs.
そこで、本発明者らは、さらに鋭意検討した結果、断
面積が連続的に拡大する吐出孔を用いるならば、口金温
度を下げても弱糸になりにくく、かつ吐出孔内のポリマ
ー流にかかる背圧も極めてスムーズかつ連続的に変化す
るため、ポリマー流が安定し吐出斑が生じないことを見
出した。Therefore, the present inventors have further studied diligently. As a result, if a discharge hole having a continuously increasing cross-sectional area is used, a weak yarn is unlikely to be formed even when the die temperature is lowered, and the polymer flow in the discharge hole is affected. Since the back pressure also changes very smoothly and continuously, it has been found that the polymer flow is stable and no discharge unevenness occurs.
さらに驚くべきことに、吐出孔の形状をかかる形状に
すると、ポリマーが吐出孔を離れる地点の断面積も極め
て大きくすることができ、例えば従来の高ドラフト紡糸
は高々1,000〜2,000程度のドラフト率であるのに対し、
数千〜数万、さらには10万以上の高ドラフト紡糸さえも
可能になったのである。さらに、口金面温度を下げるこ
とができるので、そのドラフト効果をより有効に取り出
すことができるのである。従って、口金面温度の低い本
吐出孔と口金面温度の高い他の吐出孔を有する紡糸口金
を用いて混繊糸を紡糸することにより、ピンなどの複雑
な装置を使用しないで、紡糸口金だけで、伸度差の充分
に大きい紡糸混繊糸の製造が可能となったのである。Even more surprisingly, if the shape of the discharge hole is made to be such a shape, the cross-sectional area of the point where the polymer leaves the discharge hole can be extremely large, for example, the conventional high draft spinning has a draft rate of at most about 1,000 to 2,000. While there are
Thousands to tens of thousands, and even more than 100,000 high draft spinning became possible. Furthermore, since the die surface temperature can be lowered, the draft effect can be more effectively taken out. Therefore, by spinning a mixed fiber using a spinneret having a main discharge hole having a lower die surface temperature and another discharge hole having a higher die surface temperature, only the spinneret is used without using a complicated device such as a pin. Thus, it became possible to produce a spun mixed fiber having a sufficiently large elongation difference.
本発明を、以下図面を用いてさらに詳しく説明する。 The present invention will be described in more detail with reference to the drawings.
第１図は、本発明に使用できる紡糸口金の１態様を示
すものである。Ｂ孔が「吐出孔の断面積が連続的に拡大
する吐出孔」であり、その断面積はポリマーの導入部１
の終了点２における断面積SAから連続的に拡大し、溶融
ポリマーが吐出孔を離れる点３において最大となる特徴
を有しており、この点が従来の紡糸口金（第６図）と大
きく異なる点である。すなわち、２の地点で絞ってまず
大きな背圧をかけ、次に連続的に拡大して安定な流れに
するわけである。なお、前記の断面積が連続的に拡大す
る吐出孔は、第１図Ｂ孔のごとく文字通りに連続的に拡
大する吐出孔のほか、例えば層流を乱さない程度で段階
的に拡大する場合も含む。FIG. 1 shows one embodiment of a spinneret that can be used in the present invention. Hole B is a “discharge hole in which the cross-sectional area of the discharge hole continuously increases”, and the cross-sectional area is the polymer introduction portion
Has a feature that it continuously increases from the cross-sectional area S A at the end point 2 of the above, and becomes maximum at the point 3 where the molten polymer leaves the discharge hole. This point is greatly different from the conventional spinneret (FIG. 6). It is different. That is, squeezing at the point 2 first applies a large back pressure, and then continuously expands to obtain a stable flow. In addition, the above-described discharge hole whose cross-sectional area continuously increases is not only a discharge hole that literally continuously expands as shown in FIG. Including.
次に、第１図において、Ｂ孔のポリマーが吐出される
面は、Ａ孔の吐出孔面より下部に位置することが必要で
ある。これは、Ｂ孔を離れるポリマー流の温度をＡ孔を
離れるポリマー流の温度より低くして粘性を高め、前述
の紡糸ドラフトの効果をより有効にし大きな伸度差を得
るためである。Next, in FIG. 1, it is necessary that the surface of the hole B from which the polymer is discharged is positioned lower than the surface of the discharge hole of the hole A. This is because the temperature of the polymer stream leaving hole B is made lower than the temperature of the polymer stream leaving hole A to increase the viscosity, thereby making the effect of the spinning draft more effective and obtaining a large elongation difference.
具体的には、吐出孔面間の距離Ｌは3mm以上、好まし
くは10mm以上にすると良好な結果を与える。ただ、Ｌが
あまり大きくなりすぎると、例えばＬが100mm以上にな
ると、Ａ孔、Ｂ孔間の温度差が大きくなり過ぎ適性な温
度条件が設定できなくなるので、Ｌは70mm程度までが好
ましい結果を与える。口金面の温度差は、吐出孔面間の
距離に依存する。口金面の温度差は３℃以上、特に10℃
以上が好ましい結果を与える。ただし、温度差が40℃を
超えると、安定な紡糸ができなくなるので、温度差とし
ては35℃以下にするのが好ましい。More specifically, good results are obtained when the distance L between the discharge hole surfaces is at least 3 mm, preferably at least 10 mm. However, if L becomes too large, for example, if L becomes 100 mm or more, the temperature difference between the holes A and B becomes too large to set an appropriate temperature condition, so that L is preferably up to about 70 mm. give. The temperature difference between the base surfaces depends on the distance between the discharge hole surfaces. The temperature difference between the cap surface is 3 ℃ or more, especially 10 ℃
The above gives favorable results. However, if the temperature difference exceeds 40 ° C., stable spinning becomes impossible, so that the temperature difference is preferably 35 ° C. or less.
なお、温度差をコントロールする方法としては、口金
面側面にヒーターを設置したり、特にＢ孔群のみその周
囲をバンドヒーターでコントロールする方法がある。As a method for controlling the temperature difference, there is a method in which a heater is provided on the side surface of the base, or a method in which only the B group is controlled by a band heater.
また、第１図において、具体的な断面積は、地点３に
おける断面積SBは0.1962mm2（丸孔換算lB＝1.0mmφ）以
上が好ましく、0.7850mm2（丸孔換算lB＝2.0mmφ）以上
がより好ましい結果を与える。紡糸ドラフトの面で断面
積SBは大きい方が望ましいが、あまり大きくすると１つ
の口金のなかの吐出孔の数が不足するので19.625mm
2（丸孔換算lB＝10mmφ）程度に押さえるのが同一口金
で混繊糸を得るという観点から好ましい。複数の口金を
使用する場合は、何ら制限はない。Further, in FIG. 1, the specific cross-sectional area, the cross-sectional area S B is (= 1.0 mm circular holes in terms of l B) or preferably 0.1962Mm 2 at the point 3, 0.7850mm 2 (circular hole in terms of l B = 2.0 mmφ) or more gives more preferable results. 19.625mm Since it towards the cross-sectional area S B is large in terms of spinning draft is desired, insufficient number of discharge holes is among one of the cap when too large
2 from the viewpoint of the pressing the (circular hole in terms of l B = 10 mm [phi) degrees to obtain a combined filament yarn in the same spinneret. There are no restrictions when using multiple bases.
lA、lCおよびθについては、SA＜SBの関係を満足する
だけでよく何ら限定されるものではなく、例えばlAは0.
10〜0.90mmφ、lCは0.20〜15mmφ程度で充分である。l A , l C and θ are not limited at all, only satisfying the relationship of S A <S B .For example, l A is 0.
10 to 0.90 mmφ and l C of about 0.20 to 15 mmφ are sufficient.
また、θは、５゜＜θ＜45゜、特に10゜＜θ＜30゜に
すれば充分である。Further, it is sufficient that θ is 5 ° <θ <45 °, particularly 10 ° <θ <30 °.
なお、Ａ孔であるが、これは特に限定されるものでは
なく、従来の吐出孔、例えば丸孔、異形孔など色々と使
用することができる。The hole A is not particularly limited, and various discharge holes such as a conventional discharge hole such as a round hole and a modified hole can be used.
第２図〜第３図は、本発明の紡繊糸の製造に用いるこ
とができる他の態様を示したものであるが、本発明は必
ずしもこれに限定されない。2 and 3 show other embodiments that can be used for producing the spun yarn of the present invention, but the present invention is not necessarily limited thereto.
第４図は、本発明の紡糸口金を使用して得られる混線
糸の未延伸糸の応力（St）−伸度（El）曲線（SS曲線）
であり、特に細デニール成分が低伸度で太デニール成分
が高伸度の組合せであり、例えば紡速が1,000〜2,000m/
分程度の比較的低紡速で引き取られた混繊糸のSS曲線で
あり、低伸度（El1）と高伸度（El2）との間に明確な区
分が生じ、その伸度差（El2−El1）は100％以上と極め
て大きい特徴を有する。FIG. 4 shows a stress (St) -elongation (El) curve (SS curve) of an undrawn yarn of the mixed yarn obtained by using the spinneret of the present invention.
In particular, the fine denier component is a combination of low elongation and the thick denier component is high elongation, for example, the spinning speed is 1,000 to 2,000 m /
This is an SS curve of a mixed fiber drawn at a relatively low spinning speed of about one minute, and a clear division occurs between low elongation (El 1 ) and high elongation (El 2 ), and the elongation difference (El 2 −El 1 ) has an extremely large characteristic of 100% or more.
第５図は、本発明の紡糸口金を使用して得られた混繊
糸の未延伸糸の応力伸度曲線（SS曲線）であり、この場
合は太デニール成分が低伸度となり細デニール成分が高
伸度となり、従来の紡糸混繊とは異なった挙動を示すこ
とも可能であることがわかる。FIG. 5 is a stress-elongation curve (SS curve) of an undrawn yarn of the mixed fiber obtained by using the spinneret of the present invention. In this case, the thick denier component has low elongation and the fine denier component has Has a high elongation, indicating that it is possible to exhibit a behavior different from that of the conventional spinning mixed fiber.
第６図は、従来検討されている紡糸口金の模式図を示
したものである。FIG. 6 shows a schematic view of a spinneret conventionally studied.
第７図は、従来の紡糸混繊未延伸糸の応力−伸度曲線
（SS曲線）を示す。この場合は、細デニール成分が低伸
度となるが、太デニール成分との伸度差は小さく、低紡
速で巻き取っても、高々85％程度である。FIG. 7 shows a stress-elongation curve (SS curve) of a conventional spun-blend undrawn yarn. In this case, the fine denier component has a low elongation, but the difference in elongation from the thick denier component is small, and is at most about 85% even when wound at a low spinning speed.
本発明の方法で得られる混繊糸は、必要に応じて延伸
熱処理を施して各種織編物用原糸として使用する。延伸
熱処理条件は特に限定されるものではなく、既存の設
備、既存の条件を使用することができる。また、その方
法も一度巻き取ったのち、別に延伸熱処理するいわゆる
別延の方法はもちろん、紡糸延伸熱処理を連続して行
う、いわゆる直延の方式のいずれでも可能である。The mixed fiber obtained by the method of the present invention is subjected to a stretching heat treatment as necessary, and used as a raw yarn for various woven or knitted fabrics. The stretching heat treatment conditions are not particularly limited, and existing equipment and existing conditions can be used. In addition, as for the method, any of the so-called straight-drawing method in which the spinning heat treatment is continuously performed as well as the so-called separate-drawing method in which the film is once wound and then separately subjected to a drawing heat treatment can be used.
また、通常知られているように、高紡速、例えば4,00
0m/分以上の場合は、力学的性質が向上しているので延
伸熱処理する必要はない。Also, as is generally known, high spinning speeds, for example, 4,000
In the case of 0 m / min or more, it is not necessary to perform a stretching heat treatment because the mechanical properties are improved.
さらに、本発明の混繊糸は、単に延伸糸として使用す
るだけでなく、仮撚加工を施し、加工糸としても使用す
ることができる。Furthermore, the mixed fiber of the present invention can be used not only as a drawn yarn but also as a processed yarn after false twisting.
さらに、製品の単糸デニール、総デニールも特に限定
されない。Further, the single denier and total denier of the product are not particularly limited.
なお、本発明に使用する溶融ポリマーとしては、熱可
塑性ポリエステルおよび／またはポリアミドを挙げるこ
とができる。熱可塑性ポリエステルとしては、例えばポ
リエチレンテレフタレート、ポリプロピレンテレフタレ
ート、ポリブチレンテレフタレート、ポリヘキサメチレ
ンテレフタレートなどを、ポリアミドとしては、ナイロ
ン６、ナイロン66、ナイロン46などを挙げることができ
る。In addition, as a molten polymer used for this invention, thermoplastic polyester and / or polyamide can be mentioned. Examples of the thermoplastic polyester include polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and polyhexamethylene terephthalate, and examples of the polyamide include nylon 6, nylon 66, and nylon 46.
また、本発明では、以上のようにして伸度差の大きい
紡糸混繊糸が製造できる。ここで、伸度差は、混繊糸を
構成するデニールの組合せ、あるいは巻取り速度により
大きく異なるが、本発明の目的とする伸度差とは、例え
ば細デニール成分が低伸度となる場合、紡速1,000〜1,5
00m/分の低紡速では少なくとも100％を超える伸度差、
紡速3,000m/分の中紡速でも少なくとも30％を超える大
きな伸度差をいうのであり、さらには太デニール成分の
伸度が細デニール成分の伸度より小さくなる、従来の紡
糸混繊の概念を変えるような場合をも含むものである。In the present invention, a spun mixed fiber having a large difference in elongation can be produced as described above. Here, the elongation difference is greatly different depending on the combination of denier constituting the mixed fiber or the winding speed, but the elongation difference intended for the present invention is, for example, when the fine denier component has low elongation. , Spinning speed 1,000 ~ 1,5
At a low spinning speed of 00m / min, the elongation difference exceeds at least 100%,
This means a large elongation difference of at least 30% even at a medium spinning speed of 3,000 m / min. In addition, the elongation of the thick denier component is smaller than that of the fine denier component. This includes cases where the concept is changed.
以下、実施例にて本発明をさらに詳細に説明する。な
お、本実施例において物性は下記の方法で測定したもの
である。Hereinafter, the present invention will be described in more detail with reference to Examples. In this example, the physical properties were measured by the following methods.
極限粘度 35℃、オルソクロルフェノール中オストワルド型粘度
計を用いて測定した溶融粘度から算出した。The intrinsic viscosity was calculated from the melt viscosity measured at 35 ° C. using an Ostwald viscometer in orthochlorophenol.
紡糸ドラフト 巻取り速度（Ｖ）とポリマーの吐出速度（Ｔ）の比
（V/T）で求めた。The spinning draft was determined by the ratio (V / T) between the winding speed (V) and the discharge speed (T) of the polymer.
口金面温度 吐出孔面に検出端を入れ、その表面温度を測定した。Cap surface temperature A detection end was placed on the discharge hole surface, and the surface temperature was measured.
混繊糸の強力（St）、伸度（El） オートグラフ（定速伸長型引張試験機）を用い、つか
み間隔の距離を20cmとし、標準初荷重のもとで試料をと
りつけ、引張速度100％／分で引っ張り、荷重伸長曲線
を描き、荷伸曲線の最大応力点をその試料の切断強力お
よび伸度とした。The strength (St) and elongation (El) of the blended fiber Using an autograph (constant speed elongation type tensile tester), set the distance between the grips to 20 cm, attach the sample under a standard initial load, and apply a pulling speed of 100 The sample was pulled at a rate of% / min, a load elongation curve was drawn, and the maximum stress point on the load elongation curve was defined as the breaking strength and elongation of the sample.
なお、測定回数は５回とし平均値を求め、また強力
（ｇ）は繊度当たりの強さを求めて強度（g/d）とし
た。The number of measurements was set to 5 and the average value was determined. The strength (g) was determined by determining the strength per fineness and determining the strength (g / d).
嵩高性 糸条をかせ（周長1.25m）に320回転とり、２つ折りに
したサンプルの１端に6gの荷重を吊るし、乾熱180℃で
５分間処理し、冷却後一定の重量（Wg）の堆積（Vcm3）
を6.4gの荷重下で測定し、以下の式で算出した。Bulkiness Take 320 turns on a skein (perimeter of 1.25 m), hang a load of 6 g on one end of the folded sample, treat at 180 ° C for 5 minutes, cool down, and cool to a certain weight (Wg) Deposition (Vcm 3 )
Was measured under a load of 6.4 g, and calculated by the following equation.
染色性および風合い 得られた混繊糸を筒編みし、分散染料で常圧染色し、
水洗乾燥後、180℃で１分間セットし、評価用試料とし
た。 Dyeing properties and texture The obtained mixed yarn is knitted in a tube and dyed at normal pressure with a disperse dye.
After washing, drying and setting at 180 ° C. for 1 minute, a sample for evaluation was obtained.
評価は肉眼、触感によって実施した。 The evaluation was performed with the naked eye and touch.
実施例１ 極限粘度〔η〕が0.64のポリエチレンテレフタレート
（艶消し剤として0.07重量％のTiO2を含む）を溶融し、
第２図に示す吐出形状の組合せを有する紡糸口金（Ａ、
Ｂの各ホール数はそれぞれ12Hである）を用い、14.7g/
分の吐出量で押し出した。ここで、使用した吐出孔の各
部の寸法および口金寸法を第１表に示す。Example 1 Polyethylene terephthalate having an intrinsic viscosity [η] of 0.64 (containing 0.07% by weight of TiO 2 as a matting agent) was melted.
A spinneret (A,
The number of each hole of B is 12H), and 14.7g /
Min. Table 1 shows the dimensions of each part of the discharge hole and the size of the base used.
押し出されたポリマー流に、温度26℃、湿度60％の冷
却風を30cm/秒の線速度で吹きつけ冷却固化させたの
ち、オイリングローラーで油剤を付与し、引取り速度1,
000m/分で巻き取り、133デニール/24フィラメントのマ
ルチフィラメントを得た。なお、このときの混繊糸を構
成する細デニール成分と太デニール成分の比は約1:3で
あり、また細デニール成分が低伸度であった。 A cooling air at a temperature of 26 ° C and a humidity of 60% is blown onto the extruded polymer stream at a linear speed of 30 cm / sec to solidify the polymer.
Winding was performed at 000 m / min to obtain a multifilament of 133 denier / 24 filaments. At this time, the ratio of the fine denier component to the thick denier component constituting the mixed fiber was about 1: 3, and the fine denier component had low elongation.
得られた未延伸糸の応力伸度曲線より伸度差（El2−E
l1）をを求めた結果を、第２表に示す。Elongation difference from the stress elongation curve of the undrawn yarn obtained (El 2 -E
Table 2 shows the results of obtaining l 1 ).
第２表から明らかなとおり、伸度差が極めて大きく、
第４図に示すようにあたかも低紡速で巻き取った未延伸
糸と中紡速で巻き取った未延伸糸とを混繊したようなSS
曲線の形態を呈していた。 As is clear from Table 2, the elongation difference is extremely large,
As shown in Fig. 4, an SS in which an undrawn yarn wound at a low spinning speed and an undrawn yarn wound at a medium spinning speed are mixed.
It was in the form of a curve.
引き続き、この未延伸糸を以下の条件で延伸熱処理
し、51デニール/24フィラメントの延伸糸を得た。Subsequently, the undrawn yarn was subjected to a drawing heat treatment under the following conditions to obtain a drawn yarn of 51 denier / 24 filaments.
（延伸条件） 得られた延伸糸は、嵩高性が51cm3/gと極めて嵩高性
の大きいものであった。(Stretching conditions) The obtained drawn yarn had a very high bulkiness of 51 cm 3 / g.
次に、前記マルチフィラメントを筒編みし、下記条件
で分散染料で染色した。Next, the multifilament was knitted in a tube and dyed with a disperse dye under the following conditions.
（染色条件） 染色した試料を水洗乾燥後、180℃で１分間熱セット
した。(Staining conditions) The stained sample was washed, dried, and heat set at 180 ° C. for 1 minute.
このようにして得られた試料は、均一で染色性良好な
ものであり、風合いは嵩高性のあるタッチを有してい
た。The sample thus obtained was uniform and had good dyeability, and the texture had a bulky touch.
実施例２〜６ 極限粘度〔η〕が0.72のポリエチレンテレフタレート
（艶消し剤として0.07重量％のTiO2を含む）を溶融し、
実施例１で用いた口金より実施例１と同じ要領で、92デ
ニール/24フィラメントの混繊糸を得た。なお、このと
きの吐出量および紡糸速度を変更して実施した。Examples 2 to 6 Polyethylene terephthalate having an intrinsic viscosity [η] of 0.72 (containing 0.07% by weight of TiO 2 as a matting agent) was melted,
A mixed fiber of 92 denier / 24 filaments was obtained from the spinneret used in Example 1 in the same manner as in Example 1. In addition, the discharge amount and the spinning speed at this time were changed.
紡糸条件および得られた混繊糸の伸度を第３表に示
す。なお、混繊糸は、細デニール成分が低伸度でそのデ
ニール比は1:3であった。Table 3 shows the spinning conditions and the elongation of the obtained mixed fiber. In the mixed fiber, the fine denier component had a low elongation and the denier ratio was 1: 3.
第３表にみるとおり、伸度差そのものは低紡速ほど大
きいが、3000m/分の中紡速でも60％の伸度差を有してい
た。As shown in Table 3, the elongation difference itself was larger at lower spinning speeds, but the elongation difference was 60% even at the medium spinning speed of 3000 m / min.
比較例１ 紡糸口金が第６図の組合せである以外は、実施例１と
同じ要領で実施し、133デニール/24フィラメントの混繊
糸を得た。Ｂ孔群は温度が下がったので流量が減り混繊
糸となった。 Comparative Example 1 A mixed fiber of 133 denier / 24 filaments was obtained in the same manner as in Example 1 except that the spinneret was the combination shown in FIG. Since the temperature of the hole group B decreased, the flow rate decreased, and the mixed yarn became a mixed fiber.
この時の混繊糸を構成する成分のデニール比は1:3で
あり、細デニールが低伸度であった。At this time, the denier ratio of the components constituting the mixed fiber was 1: 3, and the fine denier had low elongation.
使用した口金の各部の寸法および未延伸糸の伸度をそ
れぞれ第４表および第５表に示す。Tables 4 and 5 show the dimensions of each part of the die and the elongation of the undrawn yarn, respectively.
第５表から明らかなように、低紡速でも、85％程度し
か伸度差がつかなかった。 As is clear from Table 5, the difference in elongation was only about 85% even at a low spinning speed.
この未延伸糸を実施例１と同じ要領で3.2倍延伸し、4
2デニール/24フィラメントの延伸糸を得た。この嵩高性
は18cm3/gと低いものであった。This undrawn yarn was drawn 3.2 times in the same manner as in Example 1, and
A 2 denier / 24 filament drawn yarn was obtained. This bulkiness was as low as 18 cm 3 / g.
比較例２ 比較例１で用いたのと同じタイプの吐出孔の組合せ
で、Ａ孔が比較例１と同じで、Ｂ孔がlA1＝lB1＝5.0mm
φ、lC1＝7.2mm、Ｌ＝60mmの紡糸口金を用いて、実施例
１と同じ要領で紡糸した。Ｂ孔の吐出斑が大きく巻取れ
なかった。Comparative Example 2 A combination of discharge holes of the same type as used in Comparative Example 1, wherein A hole is the same as Comparative Example 1, and B hole is l A1 = l B1 = 5.0 mm
Using a spinneret having φ, l C1 = 7.2 mm and L = 60 mm, spinning was performed in the same manner as in Example 1. The discharge unevenness of the hole B was not large.
実施例７ 実施例１で用いたと同じタイプの吐出孔の組合せで第
６表に示す寸法の紡糸口金を用いて、実施例１と同じ要
領で紡糸し、133デニール/24フィラメントの混繊糸を得
た。このときの混繊糸を構成する成分のデニール比は1:
2であり、太デニール成分が低伸度であった。混繊糸の
伸度も併せて第６表に記す。Example 7 The same type of discharge hole as that used in Example 1 was spun in the same manner as in Example 1 using a spinneret having the dimensions shown in Table 6 to obtain a 133-denier / 24-filament mixed fiber. Obtained. The denier ratio of the components constituting the mixed fiber at this time is 1:
2, and the thick denier component had low elongation. Table 6 also shows the elongation of the mixed fiber.
本実施例においては、太デニール成分が低伸度であ
る、従来の紡糸混繊糸とは異なる混繊糸が得られた。 In this example, a mixed fiber different from the conventional spun mixed yarn, in which the thick denier component has a low elongation, was obtained.
本発明の方法によると、口金温度、紡糸温度を下げて
も弱糸になりにくく、かつ従来公知の紡糸ドラフトより
１桁以上、場合によっては２桁も大きい紡糸ドラフトを
作用させることができるので、極めて大きな伸度差を有
する混繊糸を得ることができ、さらに太デニール成分の
伸度と細デニール成分の伸度とを逆転させ、太デニール
成分を低伸度とする画期的な紡糸混繊も可能となり、そ
の工業的意義は極めて大きい。According to the method of the present invention, the spinning draft is less likely to become a weak yarn even when the spinneret temperature and the spinning temperature are lowered, and a spinning draft that is one digit or more, and in some cases, two orders of magnitude larger than conventionally known spinning drafts can be applied. It is possible to obtain a blended yarn having an extremely large difference in elongation, and to reverse the elongation of the thick denier component and the elongation of the fine denier component to make the thick denier component low elongation. Fiber is also possible, and its industrial significance is extremely large.
第１図は、本発明の混繊糸の製造に用いることができ
る、吐出孔面が下部に位置しかつその吐出孔の断面積が
連続的に拡大する吐出孔を有する紡糸口金の１態様を示
す。 第２〜３図は、本発明の製造法に使用できる紡糸口金の
他の態様を示し、第２図はＡ孔の断面積が連続的に縮小
する場合、第３図はＡ孔の断面積が連続的に拡大する場
合を示す。 第４図は、本発明の方法で得られる混繊糸の応力（St）
−伸度（El）曲線を示し、特に細デニール成分が低伸度
の場合を示す。 第５図は、本発明の方法で得られる混繊糸の応力（St）
−伸度（El）曲線で、特に太デニール成分が低伸度の場
合を示す。 第６図は、従来検討されている紡糸口金の模式図を示
す。 第７図は、本発明の方法以外の方法で得られる混繊糸の
応力（St）−伸度（El）曲線を示す。 図中、1,1′はポリマーの導入部、2,2′は導入部が終了
する点、3,3′は吐出孔の断面積が最大となる点、lA1,l
A2およびlB1,lB2はそれぞれ2,2′および3,3′の地点の
直径を示す。lC1,lC2はそれぞれ２〜３および２′〜
３′の距離、Ｌは吐出孔Ａと吐出孔Ｂの吐出面の距離を
示す。FIG. 1 shows one embodiment of a spinneret having a discharge hole whose discharge hole surface is located at a lower portion and whose cross-sectional area is continuously enlarged, which can be used for producing the mixed fiber of the present invention. Show. 2 and 3 show other embodiments of the spinneret that can be used in the production method of the present invention. FIG. 2 shows a case where the cross-sectional area of the A hole is continuously reduced. Shows a case in which is continuously enlarged. FIG. 4 shows the stress (St) of the mixed fiber obtained by the method of the present invention.
-Shows an elongation (El) curve, particularly when the fine denier component has a low elongation. FIG. 5 shows the stress (St) of the mixed fiber obtained by the method of the present invention.
-An elongation (El) curve, particularly when the thick denier component has a low elongation. FIG. 6 is a schematic view of a spinneret conventionally studied. FIG. 7 shows a stress (St) -elongation (El) curve of the mixed fiber obtained by a method other than the method of the present invention. In the figure, 1,1 ′ is a polymer introduction part, 2,2 ′ is a point where the introduction part ends, 3,3 ′ is a point where the cross-sectional area of the discharge hole is maximum, l A1 , l
A2 and l B1, l B2 denotes the diameter of a point, respectively 2,2 'and 3,3'. l C1 and l C2 are respectively 2-3 and 2 ′ ~
The distance 3 ', L indicates the distance between the discharge surfaces of the discharge holes A and B.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−282407（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) D01D 4/02,5/08──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-282407 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) D01D 4 / 02,5 / 08
Claims (4)
が異なる複数の吐出孔面を有する紡糸口金を用いて混繊
糸を得る方法において、該複数の吐出孔面の中で下部に
位置する吐出孔面に、少なくとも断面積が連続的に拡大
する吐出孔を設置した紡糸口金を用いることを特徴とす
る、伸度差を有する混繊糸の製造方法。1. A method for obtaining a mixed fiber using a spinneret having a plurality of discharge hole surfaces from which a molten polymer is discharged at different positions of a discharge hole surface, wherein the mixed fiber is positioned at a lower position among the plurality of discharge hole surfaces. A method for producing a mixed fiber having a difference in elongation, wherein a spinneret having at least a discharge hole whose cross-sectional area is continuously increased is used on a discharge hole surface to be formed.
温度が他の異なる吐出孔の口金面温度より低い、請求項
１記載の伸度差を有する混繊糸の製造方法。2. The method for producing a mixed fiber having a difference in elongation according to claim 1, wherein the die surface temperature of the discharge hole whose cross-sectional area continuously increases is lower than the die surface temperature of another different discharge hole.
最大となる断面積が少なくとも0.1962mm2である請求項
１記載の伸度差を有する混繊糸の製造方法。3. The method for producing a mixed fiber having a difference in elongation according to claim 1, wherein the maximum cross-sectional area in the discharge hole whose cross-sectional area continuously increases is at least 0.1962 mm 2 .
び／またはポリアミドである請求項１記載の伸度差を有
する混繊糸の製造方法。4. The method according to claim 1, wherein the molten polymer is a thermoplastic polyester and / or a polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32307890A JP2866190B2 (en) | 1990-11-28 | 1990-11-28 | Method for producing mixed fiber having different elongation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32307890A JP2866190B2 (en) | 1990-11-28 | 1990-11-28 | Method for producing mixed fiber having different elongation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04194010A JPH04194010A (en) | 1992-07-14 |
| JP2866190B2 true JP2866190B2 (en) | 1999-03-08 |
Family
ID=18150843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32307890A Expired - Lifetime JP2866190B2 (en) | 1990-11-28 | 1990-11-28 | Method for producing mixed fiber having different elongation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2866190B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220031A (en) | 1999-01-25 | 2000-08-08 | Teijin Ltd | Production of polyester combined filament yarn |
| JP6089786B2 (en) * | 2013-02-28 | 2017-03-08 | 東レ株式会社 | Sea-island composite fiber made of polylactic acid and polyglycolic acid |
-
1990
- 1990-11-28 JP JP32307890A patent/JP2866190B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04194010A (en) | 1992-07-14 |
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