JP2013216999A - Spun-dyed conjugate fiber having latent crimpability - Google Patents
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本発明は、伸縮性、柔軟性に優れた伸縮性不織布を得るのに適する、優れた潜在捲縮性を有し、かつ顔料を含有する複合繊維に関するものである。 The present invention relates to a composite fiber having excellent latent crimpability and containing a pigment, which is suitable for obtaining a stretchable nonwoven fabric excellent in stretchability and flexibility.
従来から、ポリエステル繊維は、衣料用、産業資材用等種々の用途に使用されているが、中でも立体捲縮を有するポリエステル繊維は、その伸縮性を生かし、パップ剤やサポーター等の医療衛生材の基布に適した不織布の構成繊維として広く用いられている。このような伸縮性に富んだ立体捲縮を有するポリエステル繊維として、熱収縮特性の異なるポリマーをサイドバイサイドまたは偏芯芯鞘構造に複合した潜在捲縮性能を有する複合繊維が数多く提案されている。 Conventionally, polyester fibers have been used for various uses such as for clothing and industrial materials. Among them, polyester fibers having three-dimensional crimps are used for medical hygiene materials such as poultices and supporters, taking advantage of their elasticity. It is widely used as a constituent fiber of a nonwoven fabric suitable for a base fabric. As a polyester fiber having such a three-dimensional crimp rich in stretchability, a number of composite fibers having latent crimping performance in which polymers having different heat shrinkage properties are combined in a side-by-side or eccentric core-sheath structure have been proposed.
例えば、特許文献１、２には、５−ナトリウムスルホイソフタル酸成分を共重合したポリエチレンテレフタレート系共重合ポリエステルとポリエチレンテレフタレートとの複合繊維が開示されている。 For example, Patent Documents 1 and 2 disclose composite fibers of a polyethylene terephthalate copolymer polyester copolymerized with a 5-sodium sulfoisophthalic acid component and polyethylene terephthalate.
また、特許文献３にはイソフタル酸とビスフェノールＡのエチレンオキシド付加体（ＢＡＥＯ）とを共重合したポリエステルとポリエチレンテレフタレートとの複合繊維が開示されている。 Patent Document 3 discloses a composite fiber of a polyester obtained by copolymerizing isophthalic acid and an ethylene oxide adduct (BAEO) of bisphenol A and polyethylene terephthalate.
今般、伸縮性不織布の市場においては、より厚みの薄いものが要求されており、この要求を満たすためには、伸縮性不織布の目付を下げることが容易に考えられるが、従来の潜在捲縮性複合繊維は高々２デシテックス程度であり、目付を下げただけでは膏薬が裏側に浸み出すという問題が生じる。また、伸縮性不織布の構成繊維の繊度を小さくすることにより厚みを薄くすることも考えられるが、細繊度化するに従って繊維の潜在捲縮性能は劣る傾向となるため不織布の伸縮性が劣り、また細繊度化により紡糸操業性が悪化しやすくなって、この結果、糸斑や切糸が発生しやすく、このようにして得られた糸は延伸工程で十分に延伸がなされず未延伸糸となるため、これを原料繊維として用いた不織布中には繊維の膠着物が混入してしまい品質面でも問題があった。 Recently, in the market for stretchable nonwoven fabrics, thinner ones are required. To meet this demand, it is easy to lower the basis weight of stretchable nonwoven fabrics. The composite fiber is at most about 2 decitex, and a problem arises that the plaster oozes out to the back side only by lowering the basis weight. In addition, it is conceivable to reduce the thickness by reducing the fineness of the constituent fibers of the stretchable nonwoven fabric. However, as the fineness becomes finer, the latent crimp performance of the fiber tends to be inferior, and the stretchability of the nonwoven fabric is inferior. The fineness of the yarn tends to deteriorate the spinning operability. As a result, yarn unevenness and cut yarn are likely to occur, and the yarn thus obtained is not sufficiently drawn in the drawing process and becomes an undrawn yarn. However, the non-woven fabric using this as a raw material fiber has a problem of quality because fiber sticking is mixed.
また、着色された複合繊維が要求される場合、染色加工したものでは、染色工程を要することによるコストアップ、工程が長くなることによる納期の長期化、また、染色工程にて発生する排水による環境への問題を有していることから、有色顔料を含有させる原着繊維が広く用いられている。例えば、特許文献４，５号公報には、５−ナトリウムスルホイソフタル酸成分を共重合したポリエステルと、有色顔料を含有したポリエチレンテレフタレートから得られたサイドバイサイド型潜在捲縮性複合繊維が記載されており、これらの繊維を用いた不織布が開示されている。 In addition, when colored composite fibers are required, for dyed processed fibers, the cost increases due to the need for the dyeing process, the delivery time is prolonged due to the lengthening of the process, and the environment due to waste water generated in the dyeing process In view of the above problem, a primary fiber containing a colored pigment is widely used. For example, Patent Documents 4 and 5 describe side-by-side latent crimped conjugate fibers obtained from a polyester copolymerized with 5-sodium sulfoisophthalic acid component and polyethylene terephthalate containing a colored pigment. A nonwoven fabric using these fibers is disclosed.
しかしながら、ここで示されている潜在捲縮性複合繊維は、捲縮性能に劣り不織布の伸縮性が不十分であり、また、有色顔料を含有するため、製糸時の操業性が不満足なものであった。したがって、優れた潜在捲縮能を有し、かつ操業性よく得ることができる原着複合繊維は未だに提案されていない。 However, the latent crimpable conjugate fiber shown here is inferior in crimping performance, the stretchability of the nonwoven fabric is insufficient, and contains colored pigments, so that the operability during yarn production is unsatisfactory. there were. Therefore, an original composite fiber that has excellent latent crimping ability and can be obtained with good operability has not been proposed yet.
本発明は上記のような問題点を解決し、染色加工を必要としないで使用することができる原着複合繊維であって、優れた伸縮性、柔軟性を有する不織布を得ることができる潜在捲縮能を有する複合繊維を提供しようとするものである。 The present invention solves the problems as described above, and is an original composite fiber that can be used without requiring a dyeing process, and can be used to obtain a nonwoven fabric having excellent stretchability and flexibility. An object of the present invention is to provide a composite fiber having a shrinkage ability.
本発明者らは、上記の課題を解決するために検討した結果、細繊度の複合繊維であっても、特定の顔料を特定のポリエステルに含有させることにより、紡糸操業性を悪化させることなく、優れた伸縮性、柔軟性を有する不織布を得ることが可能な複合繊維を得ることを見出し、本発明に到達した。 As a result of studying to solve the above-mentioned problems, the present inventors have found that even if the composite fiber has a fineness, by including a specific pigment in a specific polyester, without deteriorating the spinning operability, The present inventors have found that a composite fiber capable of obtaining a nonwoven fabric having excellent stretchability and flexibility is obtained, and the present invention has been achieved.
すなわち、本発明は、単糸繊度が０．８〜１．５デシテックスであり、潜在捲縮性を有し、顔料を含む原着複合繊維であって、
該複合繊維は、ポリエチレンテレフタレートまたはこれを主体とするポリエステル（Ａ）と、エチレンテレフタレートを主たる繰り返し単位としてイソフタル酸０〜９ｍｏｌ％およびビスフェノールＡのエチレンオキシド付加物５〜１１ｍｏｌ％を共重合した共重合ポリエステル（Ｂ）とが接合して配され、
共重合ポリエステル（Ｂ）におけるイソフタル酸とビスフェノールAのエチレンオキシド付加物の合計量が１０〜１８ｍｏｌ％であり、
共重合ポリエステル（Ｂ）の粘度がポリエステル（Ａ）の粘度よりも高く、
少なくとも共重合ポリエステル（Ｂ）は白色顔料を含み、白色顔料の含有量が、ポリエステル（Ａ）よりも共重合ポリエステル（Ｂ）が多いことを特徴とする潜在捲縮性を有する原着複合繊維を要旨とするものである。
That is, the present invention is an original composite fiber having a single yarn fineness of 0.8 to 1.5 dtex, a latent crimp, and a pigment,
The composite fiber is a copolymerized polyester obtained by copolymerizing polyethylene terephthalate or a polyester (A) mainly composed thereof with 0 to 9 mol% of isophthalic acid and 5 to 11 mol% of an ethylene oxide adduct of bisphenol A using ethylene terephthalate as a main repeating unit. (B) is joined and arranged,
The total amount of isophthalic acid and bisphenol A ethylene oxide adduct in the copolymerized polyester (B) is 10 to 18 mol%,
The viscosity of the copolyester (B) is higher than the viscosity of the polyester (A),
An original composite fiber having latent crimping characteristics, characterized in that at least the copolymer polyester (B) contains a white pigment, and the content of the white pigment is greater in the copolymer polyester (B) than in the polyester (A). It is a summary.
以下、本発明について詳細に説明する。 The present invention will be described in detail below.
本発明の潜在捲縮性を有する原着複合繊維（以下、単に「本発明の複合繊維」ともいう。）は、ポリエステル（Ａ）と共重合ポリエステル（Ｂ）とが接合して配されている。 The original composite fiber having latent crimpability according to the present invention (hereinafter, also simply referred to as “the composite fiber of the present invention”) is arranged by bonding polyester (A) and copolymerized polyester (B). .
ポリエステル（Ａ）は、ポリエチレンテレフタレートまたはこれを主体とするポリエステルである。ホモポリマーであるポリエチレンテレフタレート（ＰＥＴ）を好ましく用いられるが、本発明の効果を損なわない範囲であれば、イソフタル酸、アジピン酸、セバシン酸などのジカルボン酸成分、１，４−ブタンジオール、１，６−ヘキサンジオールなどのジオール成分を共重合したものでもよい。また、安定剤、蛍光剤、強化剤、難燃剤、酸化防止剤、分散剤等の改質剤が添加されたものを用いてもよい。 Polyester (A) is polyethylene terephthalate or polyester mainly composed thereof. Polyethylene terephthalate (PET), which is a homopolymer, is preferably used, but as long as the effects of the present invention are not impaired, dicarboxylic acid components such as isophthalic acid, adipic acid, and sebacic acid, 1,4-butanediol, 1, Copolymerized diol components such as 6-hexanediol may be used. Moreover, you may use what added modifiers, such as a stabilizer, a fluorescent agent, a reinforcement | strengthening agent, a flame retardant, antioxidant, and a dispersing agent.
共重合ポリエステル（Ｂ）は、エチレンテレフタレートを主たる繰り返し単位とし、イソフタル酸を０〜９ｍｏｌ％、ビスフェノールＡのエチレンオキシド付加物（ＢＡＥＯ）を５〜１１ｍｏｌ％共重合し、さらにイソフタル酸とＢＡＥＯの合計量が１０〜１８ｍｏｌ％とした共重合ポリエステルである。 The copolymerized polyester (B) has ethylene terephthalate as the main repeating unit, is copolymerized with 0 to 9 mol% of isophthalic acid, and 5 to 11 mol% of an ethylene oxide adduct (BAEO) of bisphenol A. Further, the total amount of isophthalic acid and BAEO Is a copolyester having 10 to 18 mol%.
ＢＡＥＯの共重合割合が５ｍｏｌ％未満であると、得られる複合繊維は潜在捲縮性能が不十分となり、このような複合繊維を不織布とした場合、伸長率や伸長回復率が小さく、伸縮性能が劣るものとなる。一方、１１ｍｏｌ％を超えるとポリマーの融点が低下し、複合繊維を得るのが困難となり、また得られる繊維の強度が低下する。ＢＡＥＯはビスフェノールＡ１ｍｏｌに対して、エチレンオキシドを２〜１０ｍｏｌ付加したものが好ましく、さらには２〜５ｍｏｌ付加したものが好ましい。 When the copolymerization ratio of BAEO is less than 5 mol%, the resulting composite fiber has insufficient latent crimping performance. When such a composite fiber is used as a nonwoven fabric, the stretch rate and the stretch recovery rate are small, and the stretch performance is low. It will be inferior. On the other hand, if it exceeds 11 mol%, the melting point of the polymer is lowered, making it difficult to obtain a composite fiber, and the strength of the resulting fiber is lowered. BAEO is preferably obtained by adding 2 to 10 mol of ethylene oxide to 1 mol of bisphenol A, and more preferably 2 to 5 mol.
また、イソフタル酸とＢＡＥＯの合計量は１０〜１８ｍｏｌ％である。合計量が１０ｍｏｌ％未満であると、単糸繊度０．８〜１．５デシテックスという非常に繊度が小さく、細い複合繊維は潜在捲縮性能が不十分となり、この複合繊維を不織布とした場合、伸長率や伸長回復率が小さく、伸縮性能が劣るものとなる。一方、１８ｍｏｌ％を超えるとポリマーの融点が低下し、複合繊維を得るのが困難となり、また得られる繊維の強度が低下する。 The total amount of isophthalic acid and BAEO is 10 to 18 mol%. When the total amount is less than 10 mol%, the fineness of single yarn fineness 0.8-1.5 dtex is very small, and the thin conjugate fiber has insufficient latent crimping performance. The stretch rate and stretch recovery rate are small, and the stretch performance is inferior. On the other hand, if it exceeds 18 mol%, the melting point of the polymer is lowered, it becomes difficult to obtain a composite fiber, and the strength of the obtained fiber is lowered.
共重合ポリエステル（Ｂ）の極限粘度は、ポリエステル（Ａ）の極限粘度よりも高い。より具体的には、ポリエステル（Ａ）は０．５０〜０．７０、共重合ポリエステル（Ｂ）は０．５５〜０．７５の範囲とし、紡糸安定性に優れるためには、２種のポリマーの極限粘度差を０．２５以下とすることが好ましく、また、後工程で十分に潜在捲縮性能を顕在化させて捲縮が発現し得る複合繊維とするためには、ポリエステル（Ａ）の極限粘度より共重合ポリエステル（Ｂ）の極限粘度を高くする。極限粘度差が０．２５より大きくなると口金直下の糸条の曲がりが大きくなり、紡糸が不安定になりやすい。ポリエステル（Ａ）の極限粘度よりポリエステル（Ｂ）の極限粘度が低いと、潜在捲縮性能を十分に顕在化させにくい。なお、極限粘度差は少なくとも０．０３程度以上であるとよい。 The intrinsic viscosity of the copolyester (B) is higher than the intrinsic viscosity of the polyester (A). More specifically, the polyester (A) is in the range of 0.50 to 0.70, the copolymer polyester (B) is in the range of 0.55 to 0.75, and two polymers are used for excellent spinning stability. It is preferable that the intrinsic viscosity difference of the polyester (A) is 0.25 or less, and in order to obtain a crimped fiber by sufficiently revealing the latent crimping performance in the subsequent step, the polyester (A) The intrinsic viscosity of the copolyester (B) is made higher than the intrinsic viscosity. When the difference in intrinsic viscosity is larger than 0.25, the bending of the yarn directly under the base becomes large, and the spinning tends to become unstable. If the intrinsic viscosity of the polyester (B) is lower than the intrinsic viscosity of the polyester (A), it is difficult to sufficiently reveal the latent crimp performance. The intrinsic viscosity difference is preferably at least about 0.03 or more.
ポリエステル（Ａ）と共重合ポリエステル（Ｂ）とが接合した複合繊維の複合形態としては、サイドバイサイド型や偏芯芯鞘型のものが挙げられ、断面形状は、円形断面、偏平、六葉、三角断面等の異形あるいは中空断面等のものが挙げられる。 Examples of the composite form of the composite fiber in which the polyester (A) and the copolyester (B) are joined include a side-by-side type and an eccentric core-sheath type, and the cross-sectional shape is a circular cross-section, flat, six-leaf, triangular. Examples thereof include irregular shapes such as a cross section and hollow cross sections.
本発明の複合繊維は、単糸繊度が０．８〜１．５デシテックスである。この範囲の単糸繊度を選択することにより、一般に使用されている単糸繊度（１．７〜４．４デシテックス程度のもの）の潜在捲縮性能を有する繊維からなる伸縮性不織布と比較して、非常に柔らかい風合いとなる。特に高圧液体流処理により繊維同士が三次元交絡した不織布の場合は、その効果が顕著である。ただし、前述したようにイソフタル酸とＢＡＥＯを特定量共重合してなる共重合ポリエステル（Ｂ）を用いることによる相乗効果でもある。なお、単糸繊度は小さいほど風合いの優れた不織布となるが、０．８デシテックスを下回ると紡糸操業性の悪化、スパイラル捲縮の発現能力が劣るものとなるため好ましくない。 The composite fiber of the present invention has a single yarn fineness of 0.8 to 1.5 dtex. By selecting a single yarn fineness within this range, compared to a stretchable nonwoven fabric made of fibers having a latent crimping performance of a commonly used single yarn fineness (about 1.7 to 4.4 dtex) The texture becomes very soft. In particular, in the case of a nonwoven fabric in which fibers are three-dimensionally entangled by high-pressure liquid flow treatment, the effect is remarkable. However, as described above, there is also a synergistic effect by using the copolyester (B) obtained by copolymerizing a specific amount of isophthalic acid and BAEO. In addition, the smaller the single yarn fineness, the better the nonwoven fabric, but if it is less than 0.8 dtex, the spinning operability is deteriorated and the ability to develop spiral crimps is inferior.
本発明において、少なくとも共重合ポリエステル（Ｂ）は、白色顔料を含んでおり、その含有量は、ポリエステル（Ａ）よりも共重合ポリエステル（Ｂ）が多い。ポリエステル（Ａ）は白色顔料を含まなくてもよいが、含む場合は多くとも０．５質量％とする。 In the present invention, at least the copolymer polyester (B) contains a white pigment, and the content of the copolymer polyester (B) is larger than that of the polyester (A). Polyester (A) does not need to contain a white pigment, but when it is included, the content is at most 0.5% by mass.
本発明においては、極限粘度の高い共重合ポリエステル（Ｂ）に、より多くの白色顔料を含有させることによって、複合繊維の製造工程において、紡糸時の冷却固化を遅らせ、得られる未延伸糸における伸度を高くすることができ、これによって、延伸工程で高倍率で延伸することが可能となり、より細い繊維径の繊維を安定的に生産することができる。 In the present invention, the copolyester (B) having a high intrinsic viscosity contains more white pigment, thereby delaying the cooling and solidification at the time of spinning in the production process of the composite fiber, and the elongation in the undrawn yarn obtained. The degree can be increased, whereby it becomes possible to stretch at a high magnification in the stretching step, and fibers having a smaller fiber diameter can be stably produced.
また、本発明の複合繊維は、白色顔料を含むことにより、繊維の重量感を増すと同時に、繊維表面に顔料である微粒子が部分的に露出することとなり、表面摩擦抵抗を下げる効果も、これらの相乗効果により、伸縮性不織布としたときに良好なドレープ感や高級感を発現することが可能となる。 In addition, since the composite fiber of the present invention contains a white pigment, the weight of the fiber is increased, and at the same time, the fine particles, which are pigments, are partially exposed on the fiber surface. Due to this synergistic effect, it is possible to express a good drape feeling and a high-class feeling when the elastic nonwoven fabric is used.
本発明で使用する白色顔料は、成形、焼成等の工程を経て得られる無機材料を微粒化したものを用いるとよく、酸化チタン、酸化珪素、酸化亜鉛等の無機酸化物微粒子が代表的であり、ポリエステルとの界面における表面張力が小さく、溶融時に凝集し難いものが操業上及び品位上から好ましい。 The white pigment used in the present invention is preferably a finely divided inorganic material obtained through processes such as molding and baking, and representative examples thereof include fine inorganic oxide particles such as titanium oxide, silicon oxide, and zinc oxide. From the viewpoint of operation and quality, those having a low surface tension at the interface with the polyester and being difficult to aggregate when melted are preferred.
白色顔料は、平均粒径が０．２〜２μｍの範囲にあるものを用いるとよい。なお、平均粒経とは、セラミック微粒子をエチレングリコール溶液に微分散させた後、島津製作所社製のレーザー回折式粒度分布測定装置ＳＡＬＤ―２０００Ｊを用い、体積分布基準換算、屈折率１．７０〜０．２０ｉの条件で測定するものである。平均粒径がこの範囲にある白色顔料が繊維表面に部分的に露出することにより、繊維表面の滑りがよくなる。平均粒径がこの範囲より小さいと繊維表面を改質する効果が乏しい。一方、この範囲より大きいと粒子が局部的に大きく露出してしまうため摩擦抵抗が大きくなり、さらには、粒子が局在するために、紡糸時に応力の偏りによる糸切れが発生したり、延伸時に毛羽が発生する等、操業的な問題が発生する場合がある。 A white pigment having an average particle diameter in the range of 0.2 to 2 μm may be used. The average particle size means that after finely dispersing ceramic fine particles in an ethylene glycol solution, using a laser diffraction particle size distribution analyzer SALD-2000J manufactured by Shimadzu Corporation, volume distribution standard conversion, refractive index 1.70 to It is measured under the condition of 0.20i. When the white pigment having an average particle diameter in this range is partially exposed on the fiber surface, the fiber surface slips better. If the average particle size is smaller than this range, the effect of modifying the fiber surface is poor. On the other hand, if it is larger than this range, the particles are locally exposed to a large extent, resulting in an increase in frictional resistance. Further, since the particles are localized, yarn breakage occurs due to stress bias during spinning, Operational problems such as fluffing may occur.
白色顔料の密度は３．５ｇ／ｃｍ３以上のものを用いるとよい。密度が３．５ｇ／ｃｍ３より小さいと、繊維の密度を増す効果が乏しく、不織布としたときに良好なドレープ性や高級感を発現しにくい傾向となり、一方、密度を増すために多量に含有させ過ぎた場合は紡糸時に糸切れが発生したり、延伸、加工時に毛羽が発生する等、操業性に問題があり、好ましくない。白色顔料の密度の上限は特に限定されるものではないが、凝集によるトラブルや操業性を考慮すると、５ｇ／ｃｍ３程度がよい。 The density of the white pigment is preferably 3.5 g / cm 3 or more. When the density is less than 3.5 g / cm 3 , the effect of increasing the density of the fiber is poor, and when it is made into a non-woven fabric, it tends to be difficult to express good drape properties and a high-class feeling. On the other hand, a large amount is included to increase the density. If too much is used, there is a problem in operability such as yarn breakage during spinning and fluffing during drawing and processing, which is not preferable. The upper limit of the density of the white pigment is not particularly limited, but is preferably about 5 g / cm 3 in consideration of troubles due to aggregation and operability.
共重合ポリエステル（Ｂ）の総質量に対する白色顔料の含有量は、１．５〜８質量％、好ましくは１．５〜６質量％である。含有量が１．５質量％未満であると、重量感の付与や表面摩擦を低下する効果は乏しくなる傾向にある。一方、含有量が８質量％を超えると、紡糸、延伸時に糸切れや毛羽等が発生しやすく、品位の低下した繊維となりやすい。 Content of the white pigment with respect to the total mass of copolyester (B) is 1.5-8 mass%, Preferably it is 1.5-6 mass%. When the content is less than 1.5% by mass, the effect of imparting a feeling of weight and reducing surface friction tends to be poor. On the other hand, if the content exceeds 8% by mass, yarn breakage and fluff are likely to occur during spinning and drawing, and the fibers tend to be of low quality.
白色顔料は、ポリエステルの重合時あるいは紡糸時の溶融段階で添加することが可能であるが、凝集を防ぎ、より均一に分散させることを考慮すると、重合時に添加することが好ましい。 The white pigment can be added at the time of melting the polyester during polymerization or spinning, but it is preferable to add at the time of polymerization in consideration of preventing aggregation and dispersing more uniformly.
本発明の複合繊維は、所望の色を付与するために、ポリエステル（Ａ）のみに有色顔料を含有させるとよい。本発明において有色顔料とは、白色顔料以外の色を呈する顔料をいう。ポリエステル（Ａ）に有色顔料を添加することにより、見かけの溶融粘度が高くなり、ポリエステル（Ａ）とポリエステル（Ｂ）の見かけの溶融粘度差が小さくなるため、紡糸性が向上する。またポリエステル（Ａ）としては、有色顔料を添加することにより見かけの溶融粘度を高くすることができることから低い極限粘度のものを用いることができるため、共重合ポリエステル（Ｂ）との極限粘度差をより大きく設けることができ、潜在捲縮性能がより向上することとなり好ましい。 The composite fiber of the present invention may contain a colored pigment only in the polyester (A) in order to impart a desired color. In the present invention, the colored pigment refers to a pigment exhibiting a color other than a white pigment. By adding a colored pigment to the polyester (A), the apparent melt viscosity is increased, and the apparent difference in melt viscosity between the polyester (A) and the polyester (B) is decreased, so that the spinnability is improved. Further, as the polyester (A), the apparent melt viscosity can be increased by adding a colored pigment, so that a polyester having a low intrinsic viscosity can be used. It can be provided larger, and the latent crimping performance is further improved, which is preferable.
有色顔料の含有量は、ポリエステル（Ａ）に対して０．１〜３質量％がよく、より好ましくは０．５〜２質量％である。含有量が０．１質量％未満であると、所望する十分な発色が得られない。一方、含有量が３質量％を超えると、繊維製造工程における溶融紡糸を円滑に行い難くなり操業性が悪化する。 The content of the colored pigment is preferably from 0.1 to 3% by mass, more preferably from 0.5 to 2% by mass, based on the polyester (A). If the content is less than 0.1% by mass, the desired sufficient color development cannot be obtained. On the other hand, when the content exceeds 3% by mass, it becomes difficult to smoothly perform melt spinning in the fiber production process, and the operability is deteriorated.
有色顔料としては、酸化鉄、カーボンブラック、弁柄、群青等の無機系顔料、シアニン系、ポリアゾ系、アンスラキノン系等の有機系顔料等が挙げられ、目的とする発色を得るためには、これらの有色顔料を適宜選定し、単独またはブレンドして使用すればよい。貼付材等の衛生材料用不織布に用いる場合は、皮膚への刺激が少ない無機系顔料を使用するのが好ましい。 Examples of colored pigments include inorganic pigments such as iron oxide, carbon black, petal, ultramarine, and organic pigments such as cyanine, polyazo, and anthraquinone. These colored pigments may be appropriately selected and used alone or in combination. When used for a non-woven fabric for sanitary materials such as a patch, it is preferable to use an inorganic pigment that is less irritating to the skin.
有色顔料の添加方法については、ポリエステル（Ａ）の重合段階あるいは複合繊維の製糸段階のいずれかの過程で添加すればよく、特に限定はしないが、設備の汚染、制御等取扱性から製糸段階に添加するのが好ましい。添加方法としては、マスターバッチ方式、リキッドカラー方式等が挙げられるが、溶融紡糸時の安定性、有色顔料の取扱性等より、マスターバッチ方式が好ましい。なお、マスターバッチ方式を採用する場合、原料ペレットの段階で計量混合して溶融紡糸する方法、別々に溶融させたポリマーを計量混合して紡糸する方法等が挙げられるが、いずれの方法で行ってもよい。また、マスターバッチ方式で複合繊維を得る場合、有色顔料を練り混むベースポリマーは、製糸性、潜在捲縮性能等から、着色する側のポリマーと同じ組成のポリマーを使用することが好ましい。 The method for adding the colored pigment may be added at any stage of the polyester (A) polymerization stage or the composite fiber spinning stage, and is not particularly limited. It is preferable to add. Examples of the addition method include a master batch method and a liquid color method, but the master batch method is preferable in view of stability during melt spinning, handling of colored pigments, and the like. In addition, when adopting the masterbatch method, there are a method of metering and melt spinning at the stage of raw material pellets, a method of metering and mixing separately melted polymers, and spinning, etc. Also good. Moreover, when obtaining a composite fiber by a masterbatch system, it is preferable to use the polymer of the same composition as the polymer of the side to color from the base polymer which kneads and mixes a colored pigment from the viewpoint of yarn-making property, latent crimp performance, etc.
次に、本発明の複合繊維の製造方法について説明する。まず、上記したポリエステル（Ａ）および共重合ポリエステル（Ｂ）を準備し、通常の複合紡糸装置により複合紡糸し、得られた未延伸糸に延伸、熱処理を施す。本発明においては、未延伸糸の繊度は特に限定されるものではなく、長繊維を得る場合には、３０〜２００デシテックスの糸条とし、紡績糸用や不織布用の短繊維を得る場合には、５０〜１００万デニールの糸束に集束してから延伸を行うことが好ましい。このとき、熱処理時の条件としては、潜在捲縮を後工程の熱処理で顕在化させるため、高温で熱処理を行うことは好ましくなく、１００〜１６０℃で熱処理することが好ましい。また、長繊維を得る場合は、延伸、熱処理後巻き取り機で巻き取る。紡績糸用や不織布用の短繊維を得る場合には、延伸、熱処理後、８〜１８個／２５ｍｍ程度の機械捲縮を付与し、仕上げ油剤を付与した後、糸条束を切断して短繊維とする。 Next, the manufacturing method of the composite fiber of this invention is demonstrated. First, the above-described polyester (A) and copolymerized polyester (B) are prepared, subjected to composite spinning using a normal composite spinning apparatus, and the obtained undrawn yarn is drawn and subjected to heat treatment. In the present invention, the fineness of the undrawn yarn is not particularly limited. When obtaining a long fiber, a yarn of 30 to 200 dtex is used, and when obtaining a short fiber for spun yarn or nonwoven fabric. It is preferable that the drawing is performed after focusing on a yarn bundle of 500 to 1,000,000 denier. At this time, as conditions for the heat treatment, it is not preferable to perform the heat treatment at a high temperature, and it is preferable to perform the heat treatment at 100 to 160 ° C., because latent crimps are manifested by a heat treatment in a subsequent process. Moreover, when obtaining a long fiber, it winds up with a winder after extending | stretching and heat processing. When obtaining short fibers for spun yarn and nonwoven fabric, after drawing and heat treatment, mechanical crimps of about 8 to 18 pieces / 25 mm are applied, a finishing oil agent is applied, and then the yarn bundle is cut and shortened. Use fiber.
本発明の複合繊維は、熱処理によって潜在捲縮性能を顕在化してスパイラル状の立体捲縮を発現する。潜在捲縮性能を良好に顕在化させるためには、弛緩状態で熱処理することが好ましい。熱処理条件としては、例えば、１６０〜１９０℃に設定した熱風乾燥機中にて３０秒〜２分間程度処理することにより良好に立体捲縮を発現させることができる。 The conjugate fiber of the present invention reveals the latent crimp performance by heat treatment and develops a spiral three-dimensional crimp. In order to make the latent crimping performance manifest well, it is preferable to perform heat treatment in a relaxed state. As the heat treatment conditions, for example, a three-dimensional crimp can be satisfactorily expressed by treating for about 30 seconds to 2 minutes in a hot air dryer set at 160 to 190 ° C.
本発明の不織布は、上記した本発明の複合繊維により構成されるものであり、本発明の複合繊維が有する特徴が活かされ、伸縮性、嵩高性および柔軟性により優れた不織布である。本発明の不織布は、本発明の複合繊維のみからなるものとすることが好ましいが、他の繊維を含有してもよく、この場合は、本発明の複合繊維の割合を７０質量％以上とすることが好ましい。 The nonwoven fabric of this invention is comprised by the composite fiber of this invention mentioned above, The characteristic which the composite fiber of this invention is utilized is a nonwoven fabric excellent in elasticity, bulkiness, and a softness | flexibility. The nonwoven fabric of the present invention is preferably composed of only the conjugate fiber of the present invention, but may contain other fibers. In this case, the proportion of the conjugate fiber of the present invention is 70% by mass or more. It is preferable.
本発明の不織布は、構成繊維同士が三次元的に交絡することにより不織布としての形状を保持しているものが好ましい。この構成繊維同士が三次元的に交絡してなる不織布は、多数の繊維が堆積してなる不織ウエブに高圧液体流を噴射することによって構成繊維同士を三次元的に交絡させることにより得られる。この構成繊維同士の三次元的な交絡により、形態保持性と実用上十分な強力そして柔軟性が不織布に具備される。不織布の目付は、用途に応じて適宜選択すればよいが、２０〜２００ｇ／ｍ2程度がよい。 The nonwoven fabric of the present invention preferably retains the shape of the nonwoven fabric as the constituent fibers are entangled three-dimensionally. A nonwoven fabric in which the constituent fibers are entangled three-dimensionally is obtained by entanglement of the constituent fibers in a three-dimensional manner by injecting a high-pressure liquid stream onto a nonwoven web in which a large number of fibers are deposited. . Due to the three-dimensional entanglement between the constituent fibers, the nonwoven fabric is provided with shape retention, practically sufficient strength and flexibility. The basis weight of the nonwoven fabric may be appropriately selected according to the use, but is preferably about 20 to 200 g / m 2 .
次に、本発明の不織布の製造方法の一例を挙げる。不織布の構成繊維となる繊維（本発明の複合繊維）を、カード機等を用いてカーディングしてカードウエブを作製し、得られたカードウエブに高圧液体流処理を施して構成繊維同士を三次元的に交絡させて一体化し、不織布を得る。本発明の複合繊維の潜在捲縮性能を発現させるには、高圧液体流処理により不織布に含まれる液体を除去するための乾燥工程において、乾燥熱処理を施し、液体除去と同時に潜在捲縮性能を発現させてスパイラル状の立体捲縮を顕在化させるとよい。 Next, an example of the manufacturing method of the nonwoven fabric of this invention is given. A card web is produced by carding a fiber (composite fiber of the present invention) which is a constituent fiber of a non-woven fabric using a card machine or the like, and the resulting card web is subjected to a high-pressure liquid flow treatment so that the constituent fibers are tertiary. Originally entangled and integrated to obtain a nonwoven fabric. In order to express the latent crimping performance of the conjugate fiber of the present invention, a drying heat treatment is performed in the drying process for removing the liquid contained in the nonwoven fabric by high-pressure liquid flow treatment, and the latent crimping performance is exhibited simultaneously with the liquid removal. It is good to make spiral three-dimensional crimps manifest.
本発明の複合繊維は、優れた潜在捲縮能を有しており、製糸性よく得ることができ、伸縮性、柔軟性に優れた不織布を得ることが可能である。 The conjugate fiber of the present invention has an excellent latent crimping ability, can be obtained with good spinning properties, and can obtain a nonwoven fabric excellent in stretchability and flexibility.
次に、本発明を実施例により具体的に説明する。なお、実施例における特性値等の測定法は次のとおりである。
（１）極限粘度〔η〕
フェノールとテトラクロロエタンとの等重量混合物を溶媒とし、２０℃で測定した。
（２）製糸性
孔数１０３８孔の丸断面複合紡糸ノズルを用い、８錘で７日間紡糸し、１日当たりの糸切れ回数が５回以下を合格（○）とし、糸切れ回数が５回を越えるものを不合格（×）とした。
（３）不織布の伸縮性（伸長回復率）
２５ｍｍ（機械方向と直交する方向）×１５０ｍｍ（機械方向）の試料片を５枚作製し、定速伸長形引張試験機を用い、つかみ間隔１００ｍｍとして、機械方向に１００ｍｍ／分の速度でつかみ間隔が１５０ｍｍとなるまで伸ばし、この状態で１分間保持した後、１００ｍｍ／分の速度で元に戻し、３分間放置後、再び１００ｍｍ／分の速度で伸ばし、荷重がかかるまでの伸びＡを測定し、下記式により、それぞれの伸長回復率を算出し、その平均値を求めた。
伸長回復率％＝〔（５０−Ａ）／５０〕×１００なお、伸長回復率が６０％以上のものを合格とした。
（４）風合い
得られた不織布について１０人のパネラーによる官能評価を行った。それぞれの性能について、１０段階で評価（１０を最も優れているものとする）させ、これらの評価値の１０人の平均値を求め、以下の４段階で評価した。◎と○を合格とした。
◎ 非常に良好：平均値が８点以上
○ 良好 ：平均値が６点〜８点未満
△ やや劣る ：平均値が５点〜６点未満
× 劣る ：平均値が５点未満
（５）不織布の品位
幅１ｍ、長さ１００ｍの不織布を製造し、１平方ｍｍ以上の繊維膠着による欠点を目視で確認した。欠点数が３０ケ以下を合格（○）、３０ケを超えるものを不合格（×）とした。
Next, the present invention will be specifically described with reference to examples. In addition, the measuring methods, such as a characteristic value in an Example, are as follows.
(1) Intrinsic viscosity [η]
Measurement was made at 20 ° C. using an equal weight mixture of phenol and tetrachloroethane as a solvent.
(2) Using a round cross-section composite spinning nozzle with 1038 holes for yarn-making, spinning with 8 spindles for 7 days, the number of yarn breaks per day is 5 or less pass (○), the number of yarn breaks is 5 times Those exceeding were regarded as rejected (x).
(3) Elasticity of nonwoven fabric (elongation recovery rate)
Five test pieces of 25 mm (direction perpendicular to the machine direction) × 150 mm (machine direction) were prepared, and using a constant speed extension type tensile tester, the grip interval was set to 100 mm, and the grip interval was 100 mm / min in the machine direction. Is held at this state for 1 minute, then returned to its original state at 100 mm / min, allowed to stand for 3 minutes, stretched again at a rate of 100 mm / min, and measured for elongation A until a load is applied. Each elongation recovery rate was calculated by the following formula, and the average value was obtained.
Elongation recovery rate% = [(50−A) / 50] × 100 In addition, those having an elongation recovery rate of 60% or more were regarded as acceptable.
(4) The sensory evaluation by 10 panelists was performed on the obtained nonwoven fabric. Each performance was evaluated in 10 stages (10 is the most excellent), and an average value of 10 of these evaluation values was obtained and evaluated in the following 4 stages. ◎ and ○ were accepted.
◎ Very good: Average value is 8 points or more ○ Good: Average value is 6 points to less than 8 points Δ Slightly inferior: Average value is 5 points to less than 6 points × Inferior: Average value is less than 5 points (5) Nonwoven fabric A nonwoven fabric having a grade width of 1 m and a length of 100 m was produced, and defects due to fiber sticking of 1 mm 2 or more were visually confirmed. When the number of defects was 30 or less, it was determined to be acceptable (◯), and the number of defects exceeding 30 was regarded as unacceptable (x).
実施例１
ポリエステル（Ａ）として、白色顔料である密度３．９ｇ／ｃｍ３、平均粒径０．７μｍの二酸化チタン微粒子を重合時に添加し、二酸化チタン微粒子の含有量が０．３質量％である〔η〕０．６４のポリエチレンテレフタレートを用い、そして、〔η〕０．６７のポリエチレンテレフタレートをベースポリマーとして、有色顔料として、酸化鉄（レッド、イエロー）、カーボンブラックを練り込んだマスターバッチを共重合ポリエステル（Ａ）中の有色顔料濃度が１質量％となるように混合した。
Example 1
As polyester (A), titanium dioxide fine particles having a density of 3.9 g / cm 3 and an average particle diameter of 0.7 μm, which are white pigments, are added during polymerization, and the content of titanium dioxide fine particles is 0.3% by mass [η ] 0.64 polyethylene terephthalate, [η] 0.67 polyethylene terephthalate as a base polymer, colored pigments, iron oxide (red, yellow), carbon black masterbatch kneaded copolymer polyester (A) It mixed so that the colored pigment density | concentration might be 1 mass%.
共重合ポリエステル（Ｂ）として、エチレンテレフタレート単位を主たる繰り返し単位とし、イソフタル酸４ｍｏｌ％、ＢＡＥＯ７ｍｏｌ％共重合した共重合ポリエステルであって、白色顔料である密度３．９ｇ／ｃｍ３、平均粒径０．７μｍの二酸化チタン微粒子を２．０質量％含有する〔η〕０．７０の共重合ポリエステルを用いた。 The copolymer polyester (B) is a copolymer polyester obtained by copolymerizing ethylene terephthalate units as main repeating units, isophthalic acid 4 mol% and BAEO 7 mol%, and is a white pigment having a density of 3.9 g / cm 3 and an average particle size of 0. A [η] 0.70 copolymer polyester containing 2.0% by mass of 0.7 μm titanium dioxide fine particles was used.
ポリエステル（Ａ）と共重合ポリエステル（Ｂ）とを、複合質量比を１：１として複合溶融紡糸装置を用いて、孔数１０３８孔の丸断面口金孔から、紡糸温度３００℃、引取速度９００ｍ／分、吐出量３８６ｇ／分でサイドバイサイド型複合繊維を紡糸した。得られた未延伸糸を、延伸温度７３℃、延伸倍率３．６０倍に延伸し、次いで１４０℃で緊張熱処理を行い、スタッフィングボックスで機械捲縮（捲縮数１２個／２５ｍｍ）を付与した後、仕上げ油剤を付与し、繊維長４４ｍｍに切断し、単糸繊度１．３ｄｔｅｘの複合繊維を得た。得られた複合繊維のみを用い、カード機にて開繊し、目付７０ｇ／ｍ２の不織ウェブを作製した。この不織ウェブをネットコンベアー上に供給し、孔径０．１２ｍｍ、孔間隔１．０ｍｍの噴射孔を複数個有する噴射ノズルを３段階に設け、前段２０ｋｇ／ｃｍ２、中段４０ｋｇ／ｃｍ２、後段１００ｋｇ／ｃｍ２の水圧で不織ウェブに高圧液体流処理を施しウェブの交絡化を行った。次いで１８０℃×１分の乾熱処理を行って潜在捲縮性能を顕在化させ、スパイラル状の立体捲縮を発現させ、不織布を得た。 The polyester (A) and the copolyester (B) were mixed at a composite mass ratio of 1: 1, using a composite melt spinning apparatus, from a circular cross-section die hole having 1038 holes, a spinning temperature of 300 ° C., a take-up speed of 900 m / The side-by-side type composite fiber was spun at a rate of 386 g / min. The obtained undrawn yarn was drawn at a drawing temperature of 73 ° C. and a draw ratio of 3.60 times, then subjected to tension heat treatment at 140 ° C., and mechanical crimping (12 crimps / 25 mm) was imparted by a stuffing box. Thereafter, a finishing oil was applied and cut into a fiber length of 44 mm to obtain a composite fiber having a single yarn fineness of 1.3 dtex. Using only the obtained composite fiber, it was opened with a card machine to produce a nonwoven web having a basis weight of 70 g / m 2 . This nonwoven web is supplied onto a net conveyor, and provided with three injection nozzles having a plurality of injection holes having a hole diameter of 0.12 mm and a hole interval of 1.0 mm, the front stage is 20 kg / cm 2 , the middle stage is 40 kg / cm 2 , the rear stage The nonwoven web was subjected to high pressure liquid flow treatment at a water pressure of 100 kg / cm 2 to entangle the web. Subsequently, a dry heat treatment was performed at 180 ° C. for 1 minute to reveal the latent crimp performance, and a spiral three-dimensional crimp was developed to obtain a nonwoven fabric.
実施例２〜４、比較例１
ポリエステル（Ａ）の有色顔料濃度が表１に示す値となるようにマスターバッチを添加した以外は、実施例１と同様に行った。
Examples 2-4, Comparative Example 1
The same procedure as in Example 1 was carried out except that the master batch was added so that the colored pigment concentration of the polyester (A) was the value shown in Table 1.
実施例５〜６、比較例２〜３
共重合ポリエステル（Ｂ）の共重合量が表１に示す値となるように変更した以外は、実施例１と同様に行った。
Examples 5-6, Comparative Examples 2-3
The same procedure as in Example 1 was conducted except that the copolymerization amount of the copolymer polyester (B) was changed to the value shown in Table 1.
実施例７〜８、比較例４〜５
複合繊維の単糸繊度を表１に示す値となるように変更した以外は、実施例１と同様に行った。
Examples 7-8, Comparative Examples 4-5
The same procedure as in Example 1 was performed except that the single fiber fineness of the composite fiber was changed to the value shown in Table 1.
比較例６
ポリエステル（Ａ）における二酸化チタン微粒子の含有量を２．０質量％、ポリエステル（Ｂ）における二酸化チタン微粒子の含有量を０．３％としたこと以外は、実施例１と同様に行った。
Comparative Example 6
The same procedure as in Example 1 was conducted except that the content of titanium dioxide fine particles in the polyester (A) was 2.0 mass% and the content of titanium dioxide fine particles in the polyester (B) was 0.3%.
比較例７
ポリエステル（Ａ）に有色顔料を添加せず、ポリエステル（Ｂ）に有色顔料を添加したこと以外は実施例１と同様に行った。
Comparative Example 7
The same procedure as in Example 1 was conducted except that the colored pigment was not added to the polyester (A) but the colored pigment was added to the polyester (B).
比較例８
ポリエステル（Ａ）に二酸化チタン微粒子を２．０％、ポリエステル（Ｂ）に二酸化チタン微粒子を０．３％含有させ、ポリエステル（Ａ）に有色顔料を添加せず、ポリエステル（Ｂ）に有色顔料（酸化鉄（レッド、イエロー）、カーボンブラック）を有色顔料濃度１質量％となるように添加したこと以外は実施例１と同様に行った。
Comparative Example 8
The polyester (A) contains 2.0% titanium dioxide fine particles, the polyester (B) contains 0.3% titanium dioxide fine particles, the colored pigment ( The same procedure as in Example 1 was performed except that iron oxide (red, yellow) and carbon black) were added so as to have a colored pigment concentration of 1% by mass.
比較例９
顔料の含有量として、ポリエステル（Ａ）に二酸化チタン微粒子を１．０質量％、有色顔料（酸化鉄（レッド、イエロー）、カーボンブラック）を０．５質量％とし、ポリエステル（Ｂ）に二酸化チタン微粒子を１．０質量％、有色顔料（酸化鉄（レッド、イエロー）、カーボンブラック）を０．５質量％としたこと以外は、実施例１と同様に実施した。
Comparative Example 9
The pigment content is 1.0% by mass of titanium dioxide fine particles in polyester (A), 0.5% by mass of colored pigments (iron oxide (red, yellow), carbon black), and titanium dioxide in polyester (B). The same procedure as in Example 1 was performed except that 1.0% by mass of fine particles and 0.5% by mass of colored pigments (iron oxide (red, yellow), carbon black) were used.
比較例１０
ポリエステル（Ａ）に有色顔料を添加しなかったこと以外は、実施例１と同様に実施し、得られた不織布をビーム染色機で染色した。染料（三菱化成社製 Dianix Blue UN-SE（1%omf））を使用し、浴比１：２０、１００℃で３０分間染色を行った。
Comparative Example 10
It implemented like Example 1 except not having added a colored pigment to polyester (A), and the obtained nonwoven fabric was dyed with a beam dyeing machine. A dye (Dianix Blue UN-SE (1% omf) manufactured by Mitsubishi Kasei Co., Ltd.) was used, and dyeing was performed at a bath ratio of 1:20 and 100 ° C. for 30 minutes.
上記の実施例１〜８、比較例１〜１０で得られた複合繊維の潜在捲縮発現性、不織布の伸縮性及び製糸性の評価結果を表１に示す。 Table 1 shows the evaluation results of the latent crimp development of the composite fibers obtained in Examples 1 to 8 and Comparative Examples 1 to 10, the stretchability of the nonwoven fabric, and the yarn-making property.
表１から明らかなように、実施例１〜８では製糸性よく複合繊維を得ることができ、得られた複合繊維は優れた潜在捲縮能を有していた。さらに、この複合繊維より得られた不織布は優れた伸縮性、風合いを有するものであった。 As can be seen from Table 1, in Examples 1-8, it was possible to obtain composite fibers with good spinning properties, and the obtained composite fibers had excellent latent crimping ability. Furthermore, the nonwoven fabric obtained from this composite fiber had excellent stretchability and texture.
一方、比較例１は、ポリエステル（Ａ）中の有色顔料の含有量が多すぎたため、製糸性が悪く、不織布の品位も劣るものとなった。 On the other hand, in Comparative Example 1, since the content of the colored pigment in the polyester (A) was too much, the yarn-making property was poor and the quality of the nonwoven fabric was inferior.
比較例２は、ポリエステル（Ｂ）中のBAEO量が少なすぎたため、不織布の伸長回復率が劣るものとなった。 In Comparative Example 2, since the BAEO amount in the polyester (B) was too small, the elongation recovery rate of the nonwoven fabric was inferior.
比較例３は、イソフタル酸とＢＡＥＯの合計共重合量が多すぎたため、製糸性が悪く、不織布の品位も劣るものとなった。 In Comparative Example 3, since the total copolymerization amount of isophthalic acid and BAEO was too large, the yarn-making property was poor, and the quality of the nonwoven fabric was inferior.
比較例４は、単糸繊度が細すぎたため、風合いは優れているが、製糸性や不織布の品位に劣るものとなった。 In Comparative Example 4, since the single yarn fineness was too thin, the texture was excellent, but the yarn-making property and the quality of the nonwoven fabric were inferior.
比較例５は、単糸繊度が太すぎたため、風合いに劣るものとなった。 In Comparative Example 5, the fineness of the single yarn was too thick, so that the texture was inferior.
比較例６は、ポリエステル（Ａ）中に二酸化チタンを高濃度に含有させたため、未延伸糸伸度が低くなり、製糸性や不織布の品位に劣るものとなった。 In Comparative Example 6, since the polyester (A) contained titanium dioxide at a high concentration, the undrawn yarn elongation was low, and the yarn forming property and the quality of the nonwoven fabric were inferior.
比較例７〜９は、ポリエステル（Ｂ）中に有色顔料を添加したため、製糸性が悪く、品位も劣るものとなった。 In Comparative Examples 7 to 9, since the colored pigment was added to the polyester (B), the yarn-making property was poor and the quality was poor.
比較例１０は、染色による熱を受けたため二次収縮が発生し、不織布の伸長回復率が劣るものとなった。
Since the comparative example 10 received the heat | fever by dyeing | staining, secondary shrinkage generate | occur | produced and the elongation recovery rate of the nonwoven fabric was inferior.
Claims (6)
該複合繊維は、ポリエチレンテレフタレートまたはこれを主体とするポリエステル（Ａ）と、エチレンテレフタレートを主たる繰り返し単位としてイソフタル酸０〜９ｍｏｌ％およびビスフェノールＡのエチレンオキシド付加物５〜１１ｍｏｌ％を共重合した共重合ポリエステル（Ｂ）とが接合して配され、
共重合ポリエステル（Ｂ）におけるイソフタル酸とビスフェノールＡのエチレンオキシド付加物の合計量が１０〜１８ｍｏｌ％であり、
極限粘度は、共重合ポリエステル（Ｂ）の値がポリエステル（Ａ）の値よりも高く、
少なくとも共重合ポリエステル（Ｂ）は白色顔料を含み、白色顔料の含有量が、ポリエステル（Ａ）よりも共重合ポリエステル（Ｂ）が多いことを特徴とする潜在捲縮性を有する原着複合繊維。 A single fiber fineness is 0.8 to 1.5 dtex, a latent crimp, and an original composite fiber containing a pigment,
The composite fiber is a copolymerized polyester obtained by copolymerizing polyethylene terephthalate or a polyester (A) mainly composed thereof with 0 to 9 mol% of isophthalic acid and 5 to 11 mol% of an ethylene oxide adduct of bisphenol A using ethylene terephthalate as a main repeating unit. (B) is joined and arranged,
The total amount of isophthalic acid and bisphenol A ethylene oxide adduct in the copolymerized polyester (B) is 10 to 18 mol%,
The intrinsic viscosity is such that the value of the copolyester (B) is higher than the value of the polyester (A),
At least the copolymer polyester (B) contains a white pigment, and the content of the white pigment is higher in the copolymer polyester (B) than the polyester (A).
A non-woven fabric characterized by comprising the original composite fiber having latent crimpability according to any one of claims 1 to 5.
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| JP2019108651A (en) * | 2017-12-15 | 2019-07-04 | 日本エステル株式会社 | Composite fiber having latent crimpability |
| JP2020029640A (en) * | 2018-08-17 | 2020-02-27 | 日本エステル株式会社 | Conjugated fiber with latent crimping property |
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| JP7253766B2 (en) | 2018-08-17 | 2023-04-07 | 日本エステル株式会社 | Composite fiber with latent crimpability |
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