JP2017066558A - Core-sheath type conjugate fiber, fiber structure and method for producing the same - Google Patents
Core-sheath type conjugate fiber, fiber structure and method for producing the same Download PDFInfo
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Landscapes
- Knitting Of Fabric (AREA)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
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Abstract
Description
本発明は、芯成分がポリエステル、鞘成分がポリプロピレンである芯鞘型複合繊維とこれを用いた繊維構造物及びその製造方法に関する。 The present invention relates to a core-sheath type composite fiber whose core component is polyester and whose sheath component is polypropylene, a fiber structure using the same, and a method for producing the same.
従来からポリエステルを芯成分とし、ポリプロピレンを鞘成分とした複合繊維は知られている。特許文献1には芯部にポリエステル、鞘部にポリプロピレンとポリエステルを混合した樹脂を配置することが提案されている。特許文献2には芯部にポリエステル、鞘部にポリプロピレンを配置し、芯部と鞘部の体積比を1/4〜1/10とすることが提案されている。本出願人らは、特許文献3において芯部にポリプロピレンを配置し、鞘部に分散染料可染性の変性ポリエステルを配置した芯鞘型複合繊維を提案している。 Conventionally, a composite fiber having polyester as a core component and polypropylene as a sheath component is known. Patent Document 1 proposes to dispose a resin in which a polyester is mixed in the core and polypropylene and polyester are mixed in the sheath. Patent Document 2 proposes that polyester is disposed in the core portion and polypropylene is disposed in the sheath portion so that the volume ratio of the core portion to the sheath portion is 1/4 to 1/10. The present applicants have proposed a core-sheath type composite fiber in which polypropylene is arranged in the core part and a disperse dye-dyeable modified polyester is arranged in the sheath part in Patent Document 3.
しかし、従来の芯鞘型複合繊維は、紡績時又は使用時に発生する摩擦などにより、繊維が割ける、いわゆるフィブリル化が発生しやすいという問題があった。フィブリル化が発生すると、染色されている繊維表面のポリエステル成分が割け、繊維内部の染色されていないポリプロピレン成分が外側に露出するため、黒など濃色に染色した場合、徐々に繊維製品が白化して見た目が悪化することに加え、フィブリル化で生じた細い繊維が絡まることにより毛玉が生じる、いわゆるピリングが生じやすいという問題があった。この問題は鞘部にポリプロピレンとポリエステルを混合した樹脂を配置する特許文献1も同様である。両ポリマーは非相溶性だからである。また、鞘部を厚くする特許文献2は、ポリプロピレンは本質的に染まらないことから濃染が困難であるという問題がある。さらに、鞘部にポリエステルを配置する特許文献3は前記フィブリル化によるピリングが生じやすい問題に加えて、製造条件によっては、繊維同士の膠着が発生しやすくなるという問題がある。 However, the conventional core-sheath type composite fiber has a problem that the fiber breaks due to friction generated during spinning or use, and so-called fibrillation easily occurs. When fibrillation occurs, the polyester component on the dyed fiber surface breaks, and the undyed polypropylene component inside the fiber is exposed to the outside, so when dyed in dark colors such as black, the fiber product gradually whitens. In addition to the deterioration of the appearance, there is a problem that so-called pilling is likely to occur, which is caused by entanglement of fine fibers generated by fibrillation. This problem also applies to Patent Document 1 in which a resin in which polypropylene and polyester are mixed is disposed in the sheath. This is because both polymers are incompatible. In addition, Patent Document 2 in which the sheath portion is thick has a problem that it is difficult to dye deeply because polypropylene is essentially not dyed. Furthermore, Patent Document 3 in which polyester is arranged in the sheath has a problem that fiber-to-fiber sticking is likely to occur depending on manufacturing conditions, in addition to the problem that pilling is likely to occur.
本発明は、前記従来の問題を解決するため、抗ピリング性があり、繊維同士の膠着が発生しにくく、染色性、高強度及び生産性の高い芯鞘型複合繊維とこれを用いた繊維構造物及びその製造方法を提供する。 In order to solve the above-mentioned conventional problems, the present invention has a core-sheath type composite fiber that has anti-pilling properties, is less likely to cause sticking between fibers, and has high dyeability, high strength, and high productivity, and a fiber structure using the same And a method for manufacturing the same.
本発明の芯鞘型複合繊維は、芯成分と鞘成分を含む芯鞘型複合繊維であって、前記芯成分は少なくとも脂肪族ジカルボン酸成分が共重合体成分として含まれ、融点が180℃以上250℃以下の共重合ポリエステルであり、前記鞘成分はポリオレフィンであり、前記芯鞘型複合繊維を100質量%としたとき、前記鞘成分は25質量%以上65質量%以下であることを特徴とする。 The core-sheath type composite fiber of the present invention is a core-sheath type composite fiber containing a core component and a sheath component, and the core component contains at least an aliphatic dicarboxylic acid component as a copolymer component, and a melting point is 180 ° C. or higher. It is a copolymerized polyester of 250 ° C. or lower, the sheath component is polyolefin, and the sheath component is 25% by mass or more and 65% by mass or less when the core-sheath type composite fiber is 100% by mass. To do.
本発明の繊維構造物は、前記の芯鞘型複合繊維からなる繊維構造物(A)又は前記芯鞘型複合繊維(A)とその他の繊維(B)を含む繊維構造物であって、前記芯鞘型複合繊維(A)とその他の繊維(B)の混合割合が質量%で10≦A≦100、0≦B≦90の範囲であることを特徴とする。 The fiber structure of the present invention is a fiber structure comprising the above-described core-sheath type composite fiber (A) or the above-described core-sheath type composite fiber (A) and other fibers (B), The mixing ratio of the core-sheath type composite fiber (A) and the other fibers (B) is in a range of 10 ≦ A ≦ 100 and 0 ≦ B ≦ 90 in mass%.
本発明の繊維構造物の製造方法は、前記繊維構造物を、分散染料を用いて温度110〜130℃の範囲で染色することを特徴とする。 The method for producing a fiber structure according to the present invention is characterized in that the fiber structure is dyed using a disperse dye in a temperature range of 110 to 130 ° C.
本発明は、芯成分は少なくとも脂肪族ジカルボン酸成分が共重合体成分として含まれ、融点が180℃以上250℃以下の共重合ポリエステルであり、鞘成分はポリオレフィンであり、前記芯鞘型複合繊維を100質量%としたとき、前記鞘成分は25質量%以上65質量%以下であることにより、抗ピリング性があり、繊維同士の膠着が発生しにくく、染色性、高強度及び生産性の高い芯鞘型複合繊維を提供できる。 In the present invention, the core component is a copolymer polyester containing at least an aliphatic dicarboxylic acid component as a copolymer component, a melting point of 180 ° C. or higher and 250 ° C. or lower, a sheath component is a polyolefin, Is 100 mass%, the sheath component is 25 mass% or more and 65 mass% or less, so that it has anti-pilling property, hardly causes sticking between fibers, and has high dyeability, high strength and productivity. A core-sheath type composite fiber can be provided.
本発明は、芯成分として融点が180℃以上250℃以下の少なくとも脂肪族ジカルボン酸成分を共重合したポリエステルを配置する。脂肪族ジカルボン酸成分を共重合したポリエステルは、ポリエステルの結晶性を落とし、靱性又はねばり性を上げる性質があり、フィブリル化(繊維の長さ方向の割れ)が発生しにくい。これにより白化現象もピリング現象も起こりにくい。加えて、結晶性を落としていることから、染料が拡散しやすく、濃色染色が可能となる。 In the present invention, a polyester obtained by copolymerizing at least an aliphatic dicarboxylic acid component having a melting point of 180 ° C. or higher and 250 ° C. or lower is disposed as a core component. Polyester obtained by copolymerizing an aliphatic dicarboxylic acid component has the property of lowering the crystallinity of polyester and increasing toughness or stickiness, and is less likely to cause fibrillation (fibre lengthwise cracking). As a result, neither whitening nor pilling occurs. In addition, since the crystallinity is reduced, the dye is easily diffused, and dark dyeing is possible.
脂肪族ジカルボン酸成分は、炭素数2〜18の脂肪族ジカルボン酸が好ましい。より好ましくは炭素数2〜10の脂肪族ジカルボン酸である。具体的には、アゼライン酸、コハク酸、アジピン酸、セバシン酸、グルタル酸などを挙げることができる。さらに好ましくはアジピン酸である。アジピン酸はナイロン原料としても使用されており、コストが安いからである。特に好ましくはアジピン酸を共重合したエチレンテレフタレート−アジペート共重合体である。 The aliphatic dicarboxylic acid component is preferably an aliphatic dicarboxylic acid having 2 to 18 carbon atoms. More preferred is an aliphatic dicarboxylic acid having 2 to 10 carbon atoms. Specific examples include azelaic acid, succinic acid, adipic acid, sebacic acid, glutaric acid and the like. More preferred is adipic acid. This is because adipic acid is also used as a raw material for nylon and its cost is low. Particularly preferred is an ethylene terephthalate-adipate copolymer obtained by copolymerizing adipic acid.
ポリエステルは下記に示す酸成分及びグリコール成分とから成る繰り返し単位を含んでも良い。
[酸成分]
(1)テレフタル酸が50モル%以上90モル%以下
(2)スルホン酸金属塩が0.2モル%以上6モル%以下
(3)脂肪族ジカルボン酸が4モル%以上49.8モル%以下
[グリコール成分]
(1)エチレングリコールが50モル%以上99.9モル%以下
(2)ジエチレングリコールが0.1モル%以上50モル%以下
The polyester may contain repeating units composed of an acid component and a glycol component described below.
[Acid component]
(1) terephthalic acid is 50 mol% to 90 mol% (2) sulfonic acid metal salt is 0.2 mol% to 6 mol% (3) aliphatic dicarboxylic acid is 4 mol% to 49.8 mol% [Glycol component]
(1) Ethylene glycol is 50 mol% or more and 99.9 mol% or less (2) Diethylene glycol is 0.1 mol% or more and 50 mol% or less
本発明で使用する芯成分のポリエステルは通常の衣料用に使用する分子量のものを使用できる。ポリエステルの場合、通常分子量は極限粘度に置き換えて表現する。極限粘度はJIS K 7367−5に規定されており、例えばポリエチレンテレフタレート1gをフェノール/1,1,2,2−テトラクロロエタン=6/4(質量比)の混合溶媒100ml中に溶解し、30℃でウベローデ型粘度計を用いて測定する。極限粘度[η]0.58〜0.70程度が衣料用に適する。重量平均分子量で約10000〜1000000程度が好ましく、30000〜800000程度がより好ましく、50000〜600000程度が特に好ましい。 As the polyester of the core component used in the present invention, those having a molecular weight used for ordinary clothing can be used. In the case of polyester, the molecular weight is usually expressed by replacing it with intrinsic viscosity. The intrinsic viscosity is specified in JIS K 7367-5. For example, 1 g of polyethylene terephthalate is dissolved in 100 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 6/4 (mass ratio), and 30 ° C. Measure with an Ubbelohde viscometer. Intrinsic viscosity [η] of about 0.58 to 0.70 is suitable for clothing. The weight average molecular weight is preferably about 10,000 to 100,000, more preferably about 30,000 to 800,000, and particularly preferably about 50,000 to 600,000.
本発明で使用する芯成分のポリエステルは、そのガラス転移温度が40℃以上70℃以下の範囲内にあることが好ましい。より好ましいガラス転移温度の下限は42℃である。さらにより好ましいガラス転移温度の下限は44℃である。より好ましいガラス転移温度の上限は68℃である。さらにより好ましいガラス転移温度の上限は65℃である。芯成分に含まれるポリエステルのガラス転移温度が40℃未満であると、このポリエステルを含む芯成分の結晶化が困難となり、可紡性が低下する可能性がある。芯成分に含まれるポリエステルのガラス転移温度が70℃を超えると、芯成分の結晶性が著しく高くなり、染色性が低下したり、繊維及びそれを用いて製造される繊維構造物の風合いが硬くなったりする可能性がある。 The core component polyester used in the present invention preferably has a glass transition temperature in the range of 40 ° C to 70 ° C. A more preferable lower limit of the glass transition temperature is 42 ° C. An even more preferable lower limit of the glass transition temperature is 44 ° C. A more preferable upper limit of the glass transition temperature is 68 ° C. An even more preferable upper limit of the glass transition temperature is 65 ° C. When the glass transition temperature of the polyester contained in the core component is less than 40 ° C., crystallization of the core component containing the polyester becomes difficult, and the spinnability may be lowered. When the glass transition temperature of the polyester contained in the core component exceeds 70 ° C., the crystallinity of the core component is remarkably increased, the dyeability is lowered, and the texture of the fiber and the fiber structure produced using the fiber is hard. There is a possibility of becoming.
本発明で使用する芯成分のポリエステルは、グリコール成分として本質的にエチレングリコールを用い、酸成分として本質的にテレフタル酸と脂肪族ジカルボン酸を用いて、従来の重縮合法により製造することができる。 The core component polyester used in the present invention can be produced by a conventional polycondensation method using essentially ethylene glycol as the glycol component and essentially terephthalic acid and aliphatic dicarboxylic acid as the acid component. .
本発明で使用する芯成分のポリエステルを重合する際の酸成分において、酸成分中に含まれているテレフタル酸の含有量は、50モル%以上90モル%以下であることが好ましい。より好ましくは、84モル%以上90モル%以下である。テレフタル酸の量が多い程、得られるポリエステル樹脂そのものの機械的強度が高くなりやすい。 In the acid component when polymerizing the polyester of the core component used in the present invention, the content of terephthalic acid contained in the acid component is preferably 50 mol% or more and 90 mol% or less. More preferably, it is 84 mol% or more and 90 mol% or less. The greater the amount of terephthalic acid, the higher the mechanical strength of the resulting polyester resin itself.
本発明で使用する芯成分のポリエステルを重合する際の酸成分として共重合しても良い前記スルホン酸金属塩は、5−スルホイソフタル酸の金属塩、4−スルホイソフタル酸の金属塩、4−スルホフタル酸の金属塩などを挙げることができ、5−スルホイソフタル酸の金属塩が好ましい。金属イオンは、ナトリウム、カリウム、リチウムなどのアルカリ金属、及びマグネシウムなどのアルカリ土類金属が好ましい。最も好ましいスルホン酸金属塩は、5−スルホイソフタル酸のナトリウム塩である。 The metal salt of sulfonic acid which may be copolymerized as an acid component when polymerizing the polyester of the core component used in the present invention is a metal salt of 5-sulfoisophthalic acid, a metal salt of 4-sulfoisophthalic acid, 4- Examples include metal salts of sulfophthalic acid, and metal salts of 5-sulfoisophthalic acid are preferable. The metal ion is preferably an alkali metal such as sodium, potassium or lithium and an alkaline earth metal such as magnesium. The most preferred metal salt of sulfonic acid is sodium salt of 5-sulfoisophthalic acid.
前記酸成分中に含まれるスルホン酸金属塩は、0.2モル%以上6モル%以下であることが好ましい。より好ましくは、0.2モル%以上1モル%以下である。この成分は比較的高価であるばかりでなく、過剰量で用いるとポリエステルが水溶性になる可能性があるほか、得られるポリエステル樹脂そのものの物理的性質に影響を及ぼす可能性がある。 The sulfonic acid metal salt contained in the acid component is preferably 0.2 mol% or more and 6 mol% or less. More preferably, it is 0.2 mol% or more and 1 mol% or less. This component is not only relatively expensive, but when used in an excessive amount, the polyester may become water-soluble and may affect the physical properties of the resulting polyester resin itself.
前記酸成分中の脂肪族ジカルボン酸成分単位は、4モル%以上49.8モル%以下、好ましくは4モル%以上15モル%以下である。脂肪族ジカルボン酸成分が4モル%未満であると、ガラス転移温度を適度に下げることができず、その結果、芯成分の結晶性が著しく高くなり、染色性が低下したり、繊維及びそれを用いて製造される繊維構造物の風合いが硬くなったりする可能性がある。一方、脂肪族ジカルボン酸成分が49.8モル%を超えると、ガラス転移温度の極端な低下を招き、繊維の可紡性が悪化する可能性がある。なお、ジカルボン酸の代わりに、酸のジメチルエステルなどのエステル形成誘導体を使用することもできる。 The aliphatic dicarboxylic acid component unit in the acid component is 4 mol% or more and 49.8 mol% or less, preferably 4 mol% or more and 15 mol% or less. If the aliphatic dicarboxylic acid component is less than 4 mol%, the glass transition temperature cannot be lowered moderately. As a result, the crystallinity of the core component is remarkably increased, the dyeability is lowered, the fiber and There is a possibility that the texture of the fiber structure produced by using it becomes hard. On the other hand, when the aliphatic dicarboxylic acid component exceeds 49.8 mol%, the glass transition temperature is extremely lowered, and the fiber spinnability may be deteriorated. In place of dicarboxylic acid, an ester-forming derivative such as dimethyl ester of acid can also be used.
前記グリコール成分中のエチレングリコールは50モル%以上99.9モル%以下、及びジエチレングリコールは0.1モル%以上50モル%以下であることが好ましい。ジエチレングリコール単位が50モル%を超えると、繊維の単繊維強度や、それを用いて得られる紡績糸の引張強さが低下する可能性がある。一方、0.1モル%未満であると、ポリエステルの結晶性が高くなりやすく、染色性が低下したり、繊維及びそれを用いて製造される繊維構造物の風合いが硬くなったりする可能性がある。 It is preferable that ethylene glycol in the glycol component is 50 mol% or more and 99.9 mol% or less, and diethylene glycol is 0.1 mol% or more and 50 mol% or less. When the diethylene glycol unit exceeds 50 mol%, the single fiber strength of the fiber and the tensile strength of the spun yarn obtained using the fiber may be lowered. On the other hand, if it is less than 0.1 mol%, the crystallinity of the polyester tends to be high, the dyeability may be lowered, and the texture of the fiber and the fiber structure produced using the fiber may be hardened. is there.
前記の少なくとも脂肪族ジカルボン酸成分を共重合したポリエステルを主体として芯成分を構成すると、この脂肪族ジカルボン酸成分を共重合したポリエステルは、ポリエステルの結晶性が適度に低下しているため、靱性又はねばり性が上がっている傾向があり、このポリエステルを芯成分とする芯鞘型複合繊維はフィブリル化(繊維の長さ方向の割れ)が発生しにくい。これにより白化現象もピリング現象も起こりにくい。加えて、結晶性を低下させていることから、染料が拡散しやすくなり、濃色染色が可能となる。特に、酸成分がテレフタル酸を84モル%以上90モル%以下の範囲内とし、スルホン酸金属塩を0.2モル%以上1モル%以下の範囲内とし、脂肪族ジカルボン酸を4モル%以上15モル%以下の範囲内とし、グリコール成分がエチレングリコールを50モル%以上99.9モル%以下の範囲内とし、ジエチレングリコールを0.1モル%以上50モル%以下の範囲内とする、ガラス転移温度が55℃以上70℃以下の範囲にある芳香族脂肪族ポリエステル成分(以下、高テレフタレートポリエステル成分とも称す)を芯成分とすることによって、生産性、染色性及び紡績糸にしたときに機械的特性に優れる芯鞘型複合繊維を得ることができる。 When the core component is mainly composed of the polyester copolymerized with at least the aliphatic dicarboxylic acid component, the polyester copolymerized with the aliphatic dicarboxylic acid component has a low crystallinity of the polyester. There is a tendency for stickiness to increase, and the core-sheath type composite fiber containing this polyester as a core component hardly causes fibrillation (cracking in the length direction of the fiber). As a result, neither whitening nor pilling occurs. In addition, since the crystallinity is lowered, the dye is easily diffused and dark dyeing becomes possible. In particular, the acid component is terephthalic acid in the range of 84 mol% to 90 mol%, the sulfonic acid metal salt is in the range of 0.2 mol% to 1 mol%, and the aliphatic dicarboxylic acid is 4 mol% or more. Glass transition with 15 mol% or less, glycol component within 50 mol% or more and 99.9 mol% or less, and diethylene glycol within 0.1 mol% or more and 50 mol% or less When an aromatic aliphatic polyester component (hereinafter also referred to as a high terephthalate polyester component) having a temperature in the range of 55 ° C. or higher and 70 ° C. or lower is used as a core component, it is mechanical when it is made into productivity, dyeability and spun yarn. A core-sheath composite fiber having excellent characteristics can be obtained.
本発明の芯鞘型複合繊維は、鞘成分としてポリオレフィンを配置する。ポリオレフィンとしては、ポリプロピレン、ポリエチレン(高密度ポリエチレン、低密度ポリエチレン、直鎖状低密度ポリエチレンを含む)、ポリメチルペンテン、ポリブテン−1の他、エチレン、プロピレン、ブテン、ペンテンといった各種オレフィンを共重合させた共重合体、各種オレフィンやポリオレフィンを主成分とするオレフィン系エラストマーが挙げられる。鞘成分のポリオレフィンは融点が100℃〜250℃のポリオレフィンが好ましく、ポリプロピレン、ポリエチレン、ポリブテン−1及びポリメチルペンテンから選ばれる少なくとも1種がより好ましく、ポリプロピレン及び/又はポリメチルペンテンが特に好ましく、ポリプロピレンが最も好ましい。前記ポリプロピレンとしては、特に限定されず、例えばホモポリマー、ランダム共重合体、ブロック共重合体、又はそれらの混合物を用いることができる。上記ランダム共重合体、ブロック共重合体としては、例えば、プロピレンと、エチレン及び炭素数4以上のα−オレフィンからなる群から選ばれる少なくとも一種のα−オレフィンとの共重合体が挙げられる。上記炭素数4以上のα−オレフィンとしては、特に限定されないが、例えば、1−ブテン、1−ペンテン、3,3−ジメチル−1−ブテン、4−メチル−1−ペンテン、4,4−ジメチル−1−ペンテン、1−デセン、1−ドデセン、1−テトラデセン、1−オクタデセンなどが挙げられる。上記共重合体におけるプロピレンの含有量は、50質量%以上であることが好ましい。中でも、可紡性、紡績工程の安定性、得られる繊維及び糸の染色性からプロピレンホモポリマー、エチレン−プロピレン共重合体及びエチレン−ブテン−1−プロピレン三元共重合体からなる群から選択される一種であることが好ましく、プロピレンホモポリマーがより好ましい。 In the core-sheath composite fiber of the present invention, polyolefin is disposed as a sheath component. Polyolefins include polypropylene, polyethylene (including high density polyethylene, low density polyethylene, linear low density polyethylene), polymethylpentene, polybutene-1, and various olefins such as ethylene, propylene, butene, and pentene. And olefin-based elastomers mainly composed of various olefins and polyolefins. The polyolefin of the sheath component is preferably a polyolefin having a melting point of 100 ° C. to 250 ° C., more preferably at least one selected from polypropylene, polyethylene, polybutene-1 and polymethylpentene, particularly preferably polypropylene and / or polymethylpentene. Is most preferred. The polypropylene is not particularly limited, and for example, a homopolymer, a random copolymer, a block copolymer, or a mixture thereof can be used. Examples of the random copolymer and block copolymer include a copolymer of propylene and at least one α-olefin selected from the group consisting of ethylene and an α-olefin having 4 or more carbon atoms. The α-olefin having 4 or more carbon atoms is not particularly limited, but examples thereof include 1-butene, 1-pentene, 3,3-dimethyl-1-butene, 4-methyl-1-pentene, and 4,4-dimethyl. Examples include -1-pentene, 1-decene, 1-dodecene, 1-tetradecene, and 1-octadecene. The propylene content in the copolymer is preferably 50% by mass or more. Above all, it is selected from the group consisting of propylene homopolymer, ethylene-propylene copolymer and ethylene-butene-1-propylene terpolymer because of spinnability, stability of spinning process, and dyeability of the resulting fiber and yarn. And a propylene homopolymer is more preferable.
鞘成分のポリプロピレンは、メルトフローレート(MFR)が25g/10分 以上60g/10分 以下が好ましい。この範囲であれば、実生産が可能な程度に糸切れはなく、安定して紡糸できる。メルトフローレート(MFR)が25g/10分 未満では、ポリプロピレンの溶融時の流動性が低く、糸切れが多くなる傾向となる。またメルトフローレート(MFR)が60g/10分 を超えると、ポリプロピレンの溶融時の粘性がなくなり、糸切れが発生し易くなる。メルトフローレート(MFR)は、JIS K 7210に準じて、230℃、21.2Nで測定する。 The polypropylene as the sheath component preferably has a melt flow rate (MFR) of 25 g / 10 min or more and 60 g / 10 min or less. Within this range, there is no yarn breakage to the extent that actual production is possible, and stable spinning is possible. When the melt flow rate (MFR) is less than 25 g / 10 min, the fluidity at the time of melting of polypropylene tends to be low and yarn breakage tends to increase. On the other hand, when the melt flow rate (MFR) exceeds 60 g / 10 min, the viscosity at the time of melting of the polypropylene is lost, and yarn breakage tends to occur. The melt flow rate (MFR) is measured at 230 ° C. and 21.2 N according to JIS K 7210.
鞘成分にポリプロピレンが存在していても芯成分のポリエステルが染色するのは、分散染料がポリプロピレンを透過してポリエステル中に拡散するからと思われる。また、鞘成分にポリプロピレンが存在することにより、繊維同士の膠着が発生しにくい。 Even if polypropylene is present in the sheath component, the polyester of the core component is dyed because the disperse dye permeates the polypropylene and diffuses into the polyester. Further, the presence of polypropylene in the sheath component makes it difficult for fibers to stick together.
ポリプロピレンは、ポリプロピレンのホモポリマー及びエチレン−プロピレン共重合体を初めとする、50モル%未満の範囲で共重合可能な成分を含む共重合体が好ましい。ポリプロピレン成分に含まれるポリプロピレン樹脂の割合は、好ましくは70質量%以上であり、より好ましくは90質量%以上であり、特に好ましくは、実質的にポリプロピレン樹脂のみから成る。好ましい上限は100%質量である。ここで、「実質的に」という用語は、通常、製品として提供される樹脂は安定剤等の添加剤を含むため、及び/又は繊維の製造に際して各種添加剤が添加されるため、ポリプロピレン樹脂のみから成り、他の成分を全く含まない形態の繊維が得られないことを考慮して使用している。通常、添加剤の含有量は、最大で15質量%である。 The polypropylene is preferably a copolymer containing a component copolymerizable in a range of less than 50 mol%, including a homopolymer of polypropylene and an ethylene-propylene copolymer. The proportion of the polypropylene resin contained in the polypropylene component is preferably 70% by mass or more, more preferably 90% by mass or more, and particularly preferably substantially consists of only the polypropylene resin. A preferred upper limit is 100% mass. Here, the term “substantially” means that the resin provided as a product usually contains additives such as stabilizers and / or because various additives are added during the production of fibers, so that only polypropylene resin is used. It is used in consideration of the fact that it is not possible to obtain a fiber having a form containing no other components. Usually, the content of the additive is a maximum of 15% by mass.
ポリプロピレン成分は、他のポリオレフィン樹脂成分を30質量%未満の範囲で、好ましくは10質量%未満の範囲で含んでよい。他のポリオレフィン樹脂成分は、例えば、ポリエチレン、ポリブテン、ポリメチルペンテン等である。ポリプロピレンは、2以上の異なるポリプロピレンからなってもよく、例えば、2以上のポリプロピレンを混合することにより、本発明のメルトフローレート(MFR)の範囲のポリプロピレンを得ることができる。 The polypropylene component may contain other polyolefin resin components in a range of less than 30% by mass, preferably in a range of less than 10% by mass. Other polyolefin resin components are, for example, polyethylene, polybutene, polymethylpentene, and the like. The polypropylene may be composed of two or more different polypropylenes. For example, by mixing two or more polypropylenes, a polypropylene having a melt flow rate (MFR) range of the present invention can be obtained.
前記芯成分と前記鞘成分の複合割合(芯鞘比)は、芯鞘型複合繊維を100質量%としたとき、芯成分が35〜75質量%、鞘成分が25〜65質量%が好ましい。この範囲であると、得られる芯鞘型複合繊維は芯成分と鞘成分の剥離が発生しにくくなり、芯鞘形複合繊維の染色性や発色性が良好である。加えて、芯鞘型複合繊維を用いた繊維構造物の速乾性、保温性等が高くなる。前記芯成分と前記鞘成分の複合割合(芯鞘比)は、質量%で芯成分:鞘成分=40〜70:60〜30であるとより好ましく、質量%で芯成分:鞘成分=40〜60:60〜40であると特に好ましく、42〜48:52〜58であると最も好ましい。また、ポリプロピレンの比重は0.90〜0.91、ポリエステルの比重は1.3〜1.4であり(ASTM D792による測定)、前記範囲であれば芯鞘型複合繊維の比重を軽くでき、さらに染色可能な芯鞘型複合繊維とすることができる。 The composite ratio (core-sheath ratio) of the core component and the sheath component is preferably 35 to 75 mass% for the core component and 25 to 65 mass% for the sheath component when the core-sheath composite fiber is 100 mass%. Within this range, the obtained core-sheath composite fiber is less likely to be peeled off from the core component, and the core-sheath composite fiber has good dyeability and color developability. In addition, the quick-drying property, heat retention, etc. of the fiber structure using the core-sheath type composite fiber are enhanced. The composite ratio (core-sheath ratio) of the core component and the sheath component is more preferably, in mass%, core component: sheath component = 40-70: 60-30, and in mass%, the core component: sheath component = 40- It is particularly preferably 60:60 to 40, and most preferably 42 to 48:52 to 58. In addition, the specific gravity of polypropylene is 0.90 to 0.91, the specific gravity of polyester is 1.3 to 1.4 (measured by ASTM D792), and the specific gravity of the core-sheath composite fiber can be reduced within the above range. Furthermore, it can be set as the dyeable core-sheath type composite fiber.
前記芯成分と前記鞘成分の複合割合(芯鞘比)は、体積比で芯/鞘=67/33〜27/73であることが好ましい。複合比が67/33〜27/73(体積比)であると、上述の効果が得られやすい。芯成分と鞘成分の複合比(芯/鞘)は61/39〜31/69(体積比)がより好ましく、50/50〜31/69(体積比)が特に好ましく、38/62〜33/67(体積比)が最も好ましい。また本発明の芯鞘型複合繊維はその繊維断面の形状は特に限定されず、円形以外の形状、例えば、楕円形、Y形、X形、井形、多角形、星形、凸部を3個〜32個有する多葉形などの異形であってもよく、これらの形状であって、繊維断面の一部に長さ方向に連続する空洞部分を有するいわゆる中空繊維であってもよい。 The composite ratio (core-sheath ratio) of the core component and the sheath component is preferably core / sheath = 67/33 to 27/73 in volume ratio. When the composite ratio is 67/33 to 27/73 (volume ratio), the above-described effect is easily obtained. The composite ratio of the core component and the sheath component (core / sheath) is more preferably 61/39 to 31/69 (volume ratio), particularly preferably 50/50 to 31/69 (volume ratio), 38/62 to 33 / 67 (volume ratio) is most preferred. Further, the shape of the fiber cross section of the core-sheath type composite fiber of the present invention is not particularly limited, and there are three shapes other than circular, for example, ellipse, Y shape, X shape, well shape, polygon, star shape, and convex portion. It may be an irregular shape such as a multi-leaf shape having ˜32, and may be a so-called hollow fiber having a hollow portion continuous in the length direction in a part of the fiber cross section.
本発明の芯鞘型複合繊維を製造するための方法は、芯成分と鞘成分を複合紡糸口金から芯鞘状態で溶融紡糸して未延伸糸とし、得られた未延伸糸に対し所望の繊度に調整するために延伸処理を行い、その後、必要に応じて緊張熱セット、又は弛緩熱セット(以下、これらの工程、処理を単に熱セットと称す)するのが好ましい。本発明の芯鞘型複合繊維を製造するための方法において、延伸処理は公知の延伸方法にて行うことができ、一例として、温水浴中で行う湿式延伸、乾燥空気中あるいは加熱した金属ロールを用いて行う乾式延伸、100℃以上の温度に加熱した、過熱水蒸気雰囲気中で行う水蒸気延伸といった延伸方法が挙げられる。この中で、本発明の芯鞘型複合繊維の製造に際しては、40〜100℃の温水浴中、好ましくは50℃〜90℃の温水浴中で湿式延伸するのが好ましい。上記の条件であれば未延伸糸を十分に延伸できるだけでなく、芯成分と鞘成分の剥離が発生しにくく、さらにポリエステル成分の加水分解も防止できる。延伸倍率は1.3〜4.5倍程度の延伸条件が好ましい。より好ましくは1.5〜3.8倍であり、さらに好ましくは1.8〜3.5倍である。これも芯成分と鞘成分の剥離を起こさないようにするためである。好ましい製造工程は、延伸し、必要に応じて熱セット、クリンパーを用いた捲縮の付与、及び繊維表面への繊維処理剤の付与といった段階を経て、乾燥する工程である。乾燥は90〜120℃の温度、より好ましくは105〜115℃の温度で、15分間程度乾燥機で行う。本発明の芯鞘型複合繊維を紡績糸や不織布にするには、トウの状態で延伸し、必要に応じて熱セット、乾燥工程まで行い、その後所定の繊維長にカットして短繊維とする。フィラメントにする場合は、延伸し、必要に応じて熱セットし、巻き取る。 The method for producing the core-sheath-type conjugate fiber of the present invention comprises a core component and a sheath component melt-spun in a core-sheath state from a composite spinneret into an undrawn yarn, and a desired fineness for the obtained undrawn yarn. It is preferable to perform a stretching process to adjust the heat treatment, and then perform a tension heat set or a relaxation heat set (hereinafter, these steps and processes are simply referred to as heat set) as necessary. In the method for producing the core-sheath composite fiber of the present invention, the stretching treatment can be performed by a known stretching method. For example, wet stretching performed in a warm water bath, dry air or a heated metal roll is used. Examples include a stretching method such as dry stretching performed using, and steam stretching performed in a superheated steam atmosphere heated to a temperature of 100 ° C. or higher. Among these, in producing the core-sheath type composite fiber of the present invention, it is preferable to wet-draw in a warm water bath of 40 to 100 ° C, preferably in a warm water bath of 50 to 90 ° C. If it is said conditions, not only an undrawn thread | yarn can fully be extended | stretched but peeling of a core component and a sheath component cannot generate | occur | produce easily, and also hydrolysis of a polyester component can be prevented. The stretching ratio is preferably about 1.3 to 4.5 times. More preferably, it is 1.5-3.8 times, More preferably, it is 1.8-3.5 times. This is also to prevent peeling of the core component and the sheath component. A preferable manufacturing process is a process of drawing and drying through steps such as heat setting, crimping using a crimper and application of a fiber treatment agent to the fiber surface as necessary. Drying is performed in a dryer for about 15 minutes at a temperature of 90 to 120 ° C., more preferably at a temperature of 105 to 115 ° C. In order to make the core-sheath type composite fiber of the present invention into a spun yarn or a nonwoven fabric, it is stretched in a tow state, subjected to heat setting and drying processes as necessary, and then cut into a predetermined fiber length to obtain short fibers. . When making a filament, it is stretched, heat-set as necessary, and wound.
本発明の芯鞘型複合繊維を製造するための方法において、必要に応じて延伸後に緊張熱セット、又は弛緩熱セットを行ってもよい。この熱セットにより、後の工程で収縮や弛緩が起こることを防止できるほか、この芯鞘型複合繊維を用いて紡績糸を製造する場合、紡績工程での工程性を良好なものにすることができる。延伸後の熱セットは、公知の方法で行うことができ、一例として、熱水中や、加熱した金属ロール、乾燥した空気中、又は加熱水蒸気を用いた熱セットが挙げられる。本発明の芯鞘型複合繊維を製造する際、熱セットは、70〜100℃の熱水浴中で行うか、100〜115℃の温度に調整した乾燥機で行うことが好ましい。前記熱セットを70〜100℃の熱水浴中で行う場合、前記延伸工程の直後に行うと、製造工程を簡略化できるため好ましい。熱セットを行う時間は処理を行う温度によって増減するが、10秒〜30分程度が好ましい。本発明の芯鞘型複合繊維を製造する場合、前記熱セットは1回(1工程)だけでもよいし、同一条件あるいは条件を変えて複数回実施してもよい。 In the method for producing the core-sheath composite fiber of the present invention, if necessary, a tension heat set or a relaxation heat set may be performed after stretching. This heat set can prevent shrinkage and relaxation in the subsequent process, and when producing spun yarn using this core-sheath type composite fiber, it can improve the processability in the spinning process. it can. The heat setting after stretching can be performed by a known method. Examples of the heat setting include hot water, a heated metal roll, dry air, or heat setting using heated steam. When manufacturing the core-sheath-type composite fiber of this invention, it is preferable to heat-set in a 70-100 degreeC hot water bath, or to perform with the dryer adjusted to the temperature of 100-115 degreeC. When performing the said heat setting in a 70-100 degreeC hot water bath, since it can simplify a manufacturing process, it is preferable if it performs immediately after the said extending process. The time for performing heat setting varies depending on the temperature at which the treatment is performed, but is preferably about 10 seconds to 30 minutes. When manufacturing the core-sheath-type composite fiber of this invention, the said heat setting may be performed only once (1 process), and may be implemented in multiple times, changing the same conditions or conditions.
本発明の芯鞘型複合繊維の繊維長は特に限定されず、芯鞘型複合繊維の用途に合わせた繊維長に切断されるが、その範囲は1〜110mmである。本発明の芯鞘型複合繊維を紡績糸に使用する場合、芯鞘型複合繊維の繊維長は24〜75mmであることが好ましく、28〜65mmであることがより好ましく、32〜54mmであることが特に好ましく、34〜48mmが最も好ましい。本発明の芯鞘型複合繊維を不織布、あるいは短繊維を充填したクッション材を始めとする中綿材料として使用する場合、繊維長は20〜80mmであることが好ましく、30〜75mmがより好ましく、35〜65mmが特に好ましく、40〜55mmが最も好ましい。 The fiber length of the core-sheath type composite fiber of the present invention is not particularly limited, and is cut to a fiber length suitable for the use of the core-sheath type composite fiber, but the range is 1-110 mm. When the core-sheath composite fiber of the present invention is used for spun yarn, the fiber length of the core-sheath composite fiber is preferably 24 to 75 mm, more preferably 28 to 65 mm, and 32 to 54 mm. Is particularly preferable, and 34 to 48 mm is most preferable. When the core-sheath type composite fiber of the present invention is used as a non-woven fabric or a batting material including a cushion material filled with short fibers, the fiber length is preferably 20 to 80 mm, more preferably 30 to 75 mm, 35 -65 mm is particularly preferable, and 40-55 mm is most preferable.
本発明の芯鞘型複合繊維は、単繊維強度が1.8〜5.0cN/dtexであることが好ましく、2.0〜4cN/dtexであることがより好ましい。単繊維強度が1.8cN/dtex以上であると、繊維を加工する際の外力(例えば、紡績張力など)を受けても、繊維が切れにくい。また、単繊維強度が5cN/dtex以下であると、抗ピリング性がさらによい繊維が得られる。本発明の芯鞘型複合繊維の単繊維強度は2.0〜3.5cN/dtexであると特に好ましく、2.2〜3.2cN/dtexであると最も好ましい。 The core-sheath type composite fiber of the present invention preferably has a single fiber strength of 1.8 to 5.0 cN / dtex, and more preferably 2.0 to 4 cN / dtex. When the single fiber strength is 1.8 cN / dtex or more, the fiber is difficult to break even when subjected to an external force (for example, spinning tension) when processing the fiber. Further, when the single fiber strength is 5 cN / dtex or less, a fiber having better anti-pilling property can be obtained. The single fiber strength of the core-sheath composite fiber of the present invention is particularly preferably 2.0 to 3.5 cN / dtex, and most preferably 2.2 to 3.2 cN / dtex.
本発明の芯鞘型複合繊維は、伸度が10〜70%であることが好ましく、20〜60%であることがより好ましく、25〜50%であると特に好ましい。伸度が10〜70%であると得られる繊維構造物の風合いを損なわない範囲で低伸度の芯鞘型複合繊維となり、紡績工程での工程性、生産性が向上しやすいため、好ましい。 The core-sheath type composite fiber of the present invention preferably has an elongation of 10 to 70%, more preferably 20 to 60%, and particularly preferably 25 to 50%. It is preferable that the elongation is 10 to 70% because the core-sheath-type composite fiber has a low elongation within a range that does not impair the texture of the resulting fiber structure, and the processability and productivity in the spinning process are easily improved.
本発明の芯鞘型複合繊維の好ましい単繊維繊度は、0.4〜20dtexである。この繊度範囲であれば得られる芯鞘型複合短繊維の特徴を活かし、様々な繊維構造物、例えば、得られた芯鞘型複合繊維を含む紡績糸を用いて織編物としたり、得られた芯鞘型複合繊維を用いて各種中綿材料としたり、当該芯鞘型複合繊維を含む各種不織布にすることが可能である。特に、前記繊度範囲を満たす本発明の芯鞘型複合繊維を含む紡績糸を用いて製造した織編物は柔軟なものとなり、衣類などに好適である。本発明の芯鞘型複合繊維を含む紡績糸及びそれを用いた織編物に適した繊度範囲は0.4〜3.5dtexであるとより好ましく、0.6〜2.5dtexであると特に好ましく、0.8〜2.0dtexであると最も好ましい。 The preferred single fiber fineness of the core-sheath composite fiber of the present invention is 0.4 to 20 dtex. Taking advantage of the characteristics of the core-sheath type composite short fiber obtained within this fineness range, various fiber structures, for example, spun yarns containing the obtained core-sheath type composite fiber were used to obtain woven or knitted fabrics. It is possible to use various types of batting materials by using the core-sheath type composite fiber, or various nonwoven fabrics containing the core-sheath type composite fiber. In particular, a woven or knitted fabric manufactured using a spun yarn containing the core-sheath composite fiber of the present invention satisfying the fineness range is flexible and suitable for clothing and the like. The fineness range suitable for the spun yarn including the core-sheath type composite fiber of the present invention and the woven or knitted fabric using the same is more preferably 0.4 to 3.5 dtex, and particularly preferably 0.6 to 2.5 dtex. 0.8 to 2.0 dtex is most preferable.
次に本発明の繊維構造物について説明する。本発明の繊維構造物は、芯鞘型複合繊維からなる繊維構造物又は前記芯鞘型複合繊維(A)とその他の繊維(B)を含む繊維構造物であって、前記芯鞘型複合繊維(A)とその他の繊維(B)の混合割合が質量%で10≦A≦100、0≦B≦90の範囲である。この範囲であれば本発明の芯鞘型複合繊維の特徴を生かすことができる。その他の繊維はアクリル系繊維、ポリエステル繊維、ポリオレフィン繊維、ナイロン繊維、アセテート繊維、アクリレート繊維、エチレンビニルアルコール系繊維、ウレタン繊維、絹繊維、ウール繊維、カシミヤ繊維、コットン繊維、麻繊維、レーヨン繊維又はキュプラ繊維等が一例として挙げられる。これらの繊維を併用又は混合して使用することもできる。本発明の繊維構造物は、糸、織物、編物、不織布、詰め綿又は繊維製品等が一例として挙げられる。 Next, the fiber structure of the present invention will be described. The fiber structure of the present invention is a fiber structure comprising a core-sheath composite fiber or a fiber structure including the core-sheath composite fiber (A) and other fibers (B), wherein the core-sheath composite fiber The mixing ratio of (A) and other fibers (B) is in the range of 10 ≦ A ≦ 100 and 0 ≦ B ≦ 90 in terms of mass%. If it is this range, the characteristic of the core-sheath-type composite fiber of this invention can be utilized. Other fibers are acrylic fiber, polyester fiber, polyolefin fiber, nylon fiber, acetate fiber, acrylate fiber, ethylene vinyl alcohol fiber, urethane fiber, silk fiber, wool fiber, cashmere fiber, cotton fiber, hemp fiber, rayon fiber or An example is a cupra fiber. These fibers can also be used in combination or mixed. Examples of the fiber structure of the present invention include yarn, woven fabric, knitted fabric, non-woven fabric, stuffed cotton, and textile products.
前記繊維構造物の一例である糸は、リング法、オープンエンド法、結束法、交互撚糸法、ラッピング法、渦流法(MVS法)又は無撚法等いずれの方法でも製造できる。この場合の好ましい番手は英式綿番手で5〜100Sの範囲である。単糸使いでも複数本撚り合わせて使用しても良い。前記繊維構造物が紡績糸の場合は、構成する芯鞘型複合繊維の繊度0.4dtex以上3.5dtex以下、繊維長24mm以上75mm以下が好ましい。前記の範囲であれば紡績糸を製造しやすい。 The yarn which is an example of the fiber structure can be produced by any method such as a ring method, an open end method, a bundling method, an alternating twist method, a wrapping method, a vortex method (MVS method), or a non-twist method. The preferred count in this case is an English cotton count in the range of 5 to 100S. A single yarn may be used or a plurality of yarns may be twisted together. When the fiber structure is a spun yarn, the fineness of the core-sheath composite fiber to be formed is preferably 0.4 to 3.5 dtex and the fiber length is 24 to 75 mm. If it is the said range, it will be easy to manufacture a spun yarn.
糸は、本発明の芯鞘型複合繊維を10質量%以上含むことが好ましい。より好ましくは本発明の芯鞘型複合繊維を20質量%含み、更に好ましくは本発明の芯鞘型複合繊維を50質量%含む。好ましい上限は100質量%である。本発明の芯鞘型複合繊維を10質量%以上含む糸は、保温性、速乾性、軽量性に優れる。 The yarn preferably contains 10% by mass or more of the core-sheath composite fiber of the present invention. More preferably, it contains 20% by mass of the core-sheath type conjugate fiber of the present invention, and further preferably contains 50% by mass of the core-sheath type conjugate fiber of the present invention. A preferable upper limit is 100 mass%. A yarn containing 10% by mass or more of the core-sheath composite fiber of the present invention is excellent in heat retention, quick drying, and light weight.
糸は、本発明の芯鞘型複合繊維に加えて、他の繊維を90質量%以下の範囲で、好ましくは80質量%以下の範囲で、より好ましく50質量%以下の範囲で含んでよい。例えば、本発明の芯鞘型複合繊維として、比較的単繊維強度が低いものを糸に用いる場合には、糸全体の強度を高くするために、他の繊維と混紡することが好ましい。他の繊維は、特に限定されないが、前述のその他の繊維(B)で挙げた繊維であってよく、なかでも、アクリル系繊維、又はポリエステル繊維であることが好ましい。アクリル系繊維やポリエステル繊維は、染色性、洗濯堅牢度、強度に優れるため、本発明の芯鞘型複合繊維の特徴を阻害することなく、糸に強度を与える。 In addition to the core-sheath composite fiber of the present invention, the yarn may contain other fibers in a range of 90% by mass or less, preferably in a range of 80% by mass or less, and more preferably in a range of 50% by mass or less. For example, when the core-sheath composite fiber of the present invention is used for a yarn having a relatively low single fiber strength, it is preferably blended with other fibers in order to increase the strength of the entire yarn. The other fibers are not particularly limited, but may be those mentioned in the above-mentioned other fibers (B), and among them, acrylic fibers or polyester fibers are preferable. Acrylic fibers and polyester fibers are excellent in dyeability, fastness to washing and strength, and thus give strength to the yarn without impairing the characteristics of the core-sheath composite fiber of the present invention.
糸を構成する繊維の構成本数は、90本以上であることが好ましく、100本以上であることがより好ましい。好ましい上限は500本である。糸を構成する繊維の構成本数が90本以上であると、精紡工程や巻糸工程で糸切れし難い。 The number of fibers constituting the yarn is preferably 90 or more, and more preferably 100 or more. A preferable upper limit is 500 pieces. When the number of fibers constituting the yarn is 90 or more, yarn breakage is difficult in the spinning process and the winding process.
前記繊維構造物が編物の場合も組織や目付、密度等は特に限定されるものではなく、平編、ゴム編又は両面編等いずれであっても良い。また、前記繊維構造物が織物であっても良い。 Even when the fiber structure is a knitted fabric, the structure, basis weight, density and the like are not particularly limited, and may be a flat knitted fabric, a rubber knitted fabric, a double knitted fabric or the like. The fiber structure may be a woven fabric.
他の繊維との併用又は混合は、例えば下記の方法を採用できる。
(1)混紡:混紡は綿段階において2種以上の繊維の混合である。例えば混打綿、カード、練条、スライバーなどでの混合である。糸、不織布の主に均一混合の場合に使用される。
(2)合糸:合糸は2種以上の糸を撚り合わせる混合である。例えば双糸の場合、本発明の繊維糸と他の繊維糸とを撚り合せる混合である。紡績糸同士、紡績糸とフィラメント糸、フィラメント糸同士の撚り合わせに使用される。
(3)混繊:混繊は、フィラメント糸同士の繊維を混合するときに使用される。
(4)交織:交織は、織物を構成する糸を複数種類使用して織物にする場合の混合である。例えば、経糸と緯糸を異なる種類の糸にするとか、経糸、緯糸をそれぞれ複数種使用することもできる。
(5)交編:交編は編物を製造する際に複数種類の糸を使用する場合の混合である。
(6)不織布製造におけるニードルパンチ、水流交絡によって、積層した複数種類の繊維層を混合する。
For example, the following method can be used for combination or mixing with other fibers.
(1) Blending: Blending is a blending of two or more fibers at the cotton stage. For example, blending with mixed cotton, card, strips, sliver and the like. Used mainly for uniform mixing of yarn and nonwoven fabric.
(2) Combined yarn: Combined yarn is a mixture of two or more yarns twisted together. For example, in the case of twin yarn, it is a mixture in which the fiber yarn of the present invention and other fiber yarns are twisted together. Used for twisting spun yarns, spun yarns and filament yarns, and filament yarns.
(3) Mixed fiber: Mixed fiber is used when mixing fibers of filament yarns.
(4) Interweaving: Interwoven is a mixture when a plurality of types of yarns constituting a woven fabric are used to form a woven fabric. For example, different types of warp and weft may be used, or multiple types of warp and weft may be used.
(5) Knit: Knit is a mixture when multiple types of yarn are used when manufacturing a knitted fabric.
(6) A plurality of laminated fiber layers are mixed by needle punching and hydroentanglement in the production of a nonwoven fabric.
繊維構造物が、織編物である場合、繊維構造物は、本発明の芯鞘型複合繊維を含む糸を10質量%以上含む織編物であることが好ましい。より好ましくは、本発明の芯鞘型複合繊維を含む糸を20質量%以上含み、さらに好ましくは、本発明の芯鞘型複合繊維を含む糸を30質量%以上含む。好ましい上限は100質量%である。このような織編物は、染色性、保温性、速乾性、軽量性に優れる。 When the fiber structure is a woven or knitted fabric, the fiber structure is preferably a woven or knitted fabric containing 10% by mass or more of the yarn containing the core-sheath composite fiber of the present invention. More preferably, the yarn containing the core-sheath conjugate fiber of the present invention contains 20% by mass or more, and more preferably, the yarn containing the core-sheath conjugate fiber of the present invention contains 30% by mass or more. A preferable upper limit is 100 mass%. Such a woven or knitted fabric is excellent in dyeability, heat retention, quick drying, and light weight.
織編物は、本発明の芯鞘型複合繊維を含む糸と他の繊維の糸とからなることが好ましい。この場合、織編物は他の繊維を90質量%以下の範囲で含んでよく、好ましくは80質量%以下の範囲で、より好ましく70質量%以下の範囲で含んでよい。他の繊維の形態は、糸、モノフィラメント糸、マルチフィラメント糸等いずれの形態であってもよい。他の繊維は、前述のその他の繊維(B)で挙げた繊維であってよく、なかでも、ポリエステル繊維又はウレタン繊維であることが好ましい。ポリエステル繊維は、染色性、洗濯堅牢度、強度に優れるため、本発明の繊維の特徴を阻害することなく、糸に強度を与える。また、ウレタン繊維は伸縮性に優れており、かつ緩やかに収縮するので、本発明の繊維の柔らかい風合いを活かしながら、ストレッチ性を付与した織編物を得ることができる。 The woven or knitted fabric is preferably composed of a yarn containing the core-sheath composite fiber of the present invention and a yarn of another fiber. In this case, the woven or knitted fabric may contain other fibers in a range of 90% by mass or less, preferably in a range of 80% by mass or less, and more preferably in a range of 70% by mass or less. The form of other fibers may be any form such as yarn, monofilament yarn, multifilament yarn and the like. The other fibers may be those mentioned in the above-mentioned other fibers (B), and among them, polyester fibers or urethane fibers are preferable. Since the polyester fiber is excellent in dyeability, fastness to washing and strength, it gives strength to the yarn without impairing the characteristics of the fiber of the present invention. Moreover, since the urethane fiber is excellent in stretchability and contracts gently, a woven or knitted fabric imparted with stretchability can be obtained while utilizing the soft texture of the fiber of the present invention.
本発明の繊維構造物は、衣類、寝装具の側地、毛布、ひざ掛け又はカーペット等の繊維製品も含む。衣類としては、例えば、肌着、下着、シャツ、ジャンパー、セーター、パンツ、トレーニングウエア、タイツ、腹巻、マフラー、帽子、手袋、靴下、耳あて等がある。防寒衣料、スポーツウエア、衣料用詰め綿等にも好適である。さらにフリース等のように生地表面を起毛しても良い。 The textile structure of the present invention also includes textiles such as clothing, bedding linings, blankets, rugs or carpets. Examples of clothing include underwear, underwear, shirts, jumpers, sweaters, pants, training wear, tights, stomachbands, mufflers, hats, gloves, socks, ear pads, and the like. It is also suitable for cold clothing, sportswear, stuffed cotton. Further, the surface of the fabric may be raised like a fleece.
本発明の繊維構造物の製造方法は、前記繊維構造物に対し、分散染料を用いて温度110〜130℃の範囲で染色する。これにより濃色に染色された染色物を得ることができる。 In the method for producing a fiber structure of the present invention, the fiber structure is dyed using a disperse dye in a temperature range of 110 to 130 ° C. Thereby, the dyed material dye | stained darkly can be obtained.
以下図面の説明をする。図1は本発明の一実施例における芯鞘型複合繊維の概略断面図である。芯鞘型複合繊維1はポリエステルの芯成分2と、ポリプロピレンの鞘成分3で構成されている。芯成分(ポリエステル)2が染色され、鞘成分(ポリプロピレン)3は染色されていないが、芯鞘型複合繊維1全体としては染色された状態に見える。 The drawings will be described below. FIG. 1 is a schematic cross-sectional view of a core-sheath type composite fiber in one embodiment of the present invention. The core-sheath type composite fiber 1 is composed of a polyester core component 2 and a polypropylene sheath component 3. Although the core component (polyester) 2 is dyed and the sheath component (polypropylene) 3 is not dyed, the core-sheath composite fiber 1 as a whole appears to be dyed.
以下、実施例を用いて本発明をさらに具体的に説明する。なお、本発明は下記の実施例に限定されるものではない。 Hereinafter, the present invention will be described more specifically with reference to examples. In addition, this invention is not limited to the following Example.
実施例及び比較例で用いた測定方法は以下のとおりである。
<メルトフローレート(MFR)>
JIS K 7210に準じて、230℃、21.2Nで測定した。
<極限粘度>
JIS K 7367−5に従い、ポリエステル1gをフェノール/1,1,2,2−テトラクロロエタン=6/4(質量比)の混合溶媒100ml中に溶解し、30℃でウベローデ型粘度計を用いて測定した。
<単繊維強度及び破断伸度>
JIS L 1015に準じて、引張試験機を用いて、試料のつかみ間隔を20mmとしたときの繊維切断時の荷重値及び伸度を測定し、それぞれ単繊維強度及び繊維伸度とした。
<捲縮数及び捲縮率>
JIS L 1015に準じて測定した。
<洗濯耐久性及び染色堅牢度>
得られる芯鞘型複合繊維の染色性、及び染色堅牢度を評価するため、後述する方法で得られた、染色済みの水流交絡不織布に対し洗濯処理を行い、芯鞘型複合繊維の洗濯耐久性及び染色堅牢度を評価した。
洗濯は、染色した水流交絡不織布に対し、 JIS L 0217に定められている家庭洗濯103法に準じた洗濯試験で行う。まず染色した水流交絡不織布を用いて縦30cm、横21cmの大きさに裁断した試料を用意する。用意した試料片の質量を測定し、試験片の質量との和が1kgになるように負荷布を用意する。用意した試験片及び負荷布を家庭用洗濯機に投入し、水30リットルの条件でJAFET標準配合洗剤を使用した洗浄を25分間行う。脱水後2分間水洗し、再度脱水する。再び2分間水洗した後4分間脱水処理をする。この処理を2回行った後、試料片を室内にて吊干し乾燥させる。乾燥した後の試料の表面を肉眼にて観察し、以下の基準で染色堅牢度を評価した。
++:濃色に染色されており、洗濯処理前後で染色濃度の変化が少ない。
+ :使用可能な程度に染色されており、洗濯処理前後でも染色濃度の変化が少ない。
− :染色濃度が不十分である。また、洗濯処理後の試料には色落ちが発生している。
また、前記洗濯処理が終了した水流交絡不織布の表面を走査型電子顕微鏡にて観察し、以下の基準にて芯鞘剥離の発生状況を評価した。
+ :不織布表面において芯鞘型複合繊維の芯鞘剥離が生じていない、あるいは芯鞘剥離の発生がわずかである。
− :不織布表面において芯鞘型複合繊維の芯鞘剥離が明らかに発生しており、一部は毛玉を発生している。
The measuring methods used in Examples and Comparative Examples are as follows.
<Melt flow rate (MFR)>
It measured at 230 degreeC and 21.2N according to JISK7210.
<Intrinsic viscosity>
According to JIS K 7367-5, 1 g of polyester was dissolved in 100 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 6/4 (mass ratio) and measured at 30 ° C. using an Ubbelohde viscometer. did.
<Single fiber strength and elongation at break>
In accordance with JIS L 1015, using a tensile tester, the load value and elongation at the time of fiber cutting when the holding distance of the sample was 20 mm were measured, and the single fiber strength and fiber elongation were obtained, respectively.
<Number of crimps and crimp ratio>
It measured according to JIS L1015.
<Washing durability and dyeing fastness>
In order to evaluate the dyeability and dyeing fastness of the obtained core-sheath type composite fiber, washing treatment is performed on the dyed hydroentangled nonwoven fabric obtained by the method described later, and the washing durability of the core-sheath type composite fiber is obtained. And dyeing fastness was evaluated.
Laundry is performed on a dyed hydroentangled nonwoven fabric in a laundry test according to the Household Laundry 103 method defined in JIS L 0217. First, a sample cut to a size of 30 cm in length and 21 cm in width using a dyed hydroentangled nonwoven fabric is prepared. The mass of the prepared sample piece is measured, and a load cloth is prepared so that the sum with the mass of the test piece is 1 kg. The prepared test piece and the load cloth are put into a household washing machine and washed with a JAFET standard detergent for 25 minutes under the condition of 30 liters of water. Wash with water for 2 minutes after dehydration and dehydrate again. Wash again for 2 minutes and then dehydrate for 4 minutes. After performing this process twice, the sample piece is hung in the room and dried. The surface of the sample after drying was observed with the naked eye, and the color fastness was evaluated according to the following criteria.
++: Dyed in a dark color and little change in dyeing density before and after the washing process.
+: Dyed to the extent that it can be used, and there is little change in the dyeing density even before and after the washing treatment.
−: The staining density is insufficient. Further, color fading has occurred in the sample after the washing treatment.
Moreover, the surface of the hydroentangled nonwoven fabric after the washing treatment was observed with a scanning electron microscope, and the occurrence of core-sheath peeling was evaluated according to the following criteria.
+: The core-sheath composite fiber is not peeled off from the core-sheath composite fiber, or the occurrence of the core-sheath peeling is slight.
-: The core-sheath composite fiber was clearly peeled off on the nonwoven fabric surface, and some of the pills were generated.
(実施例1〜9、比較例1、2)
<使用ポリマー>
下記のポリプロピレンとポリエステルを用いた。
(1)PP−1 サンアロマー株式会社製 商品名「PLA000A」、MFR:45g/10分
(2)PP−2 日本ポリプロ株式会社製 商品名「SA03」、MFR:30g/10分
(3)PP−3 プライムポリマー株式会社製 商品名「S105HG」、MFR:30g/10分
(4)PES−1 米国デュポン社製 商品名「アペクサ(登録商標)4027」、エチレンテレフタレート−アジペート共重合体、融点:235℃、極限粘度[η]:0.63(以下、このポリエステル樹脂を「PES−1」という)
(5)PES−2 米国デュポン社製 商品名「アペクサ(登録商標)4024」、エチレンテレフタレート−アジペート共重合体(以下、このポリエステル樹脂を「PES−2」という)
(6)PTT 米国デュポン社製 商品名「ソロナ(登録商標)」、ポリトリメチレンテレフタレート(以下、このポリエステル樹脂を「PTT」という)
(Examples 1-9, Comparative Examples 1 and 2)
<Polymer used>
The following polypropylene and polyester were used.
(1) PP-1 Sun Allomer Co., Ltd. trade name “PLA000A”, MFR: 45 g / 10 min (2) PP-2 Nippon Polypro Co., Ltd. trade name “SA03”, MFR: 30 g / 10 min (3) PP- 3 Product name “S105HG” manufactured by Prime Polymer Co., Ltd., MFR: 30 g / 10 min (4) PES-1 Product name “APEXA (registered trademark) 4027” manufactured by DuPont, USA, ethylene terephthalate-adipate copolymer, melting point: 235 ° C., intrinsic viscosity [η]: 0.63 (hereinafter, this polyester resin is referred to as “PES-1”)
(5) PES-2 manufactured by DuPont, USA Trade name “Apexa (registered trademark) 4024”, ethylene terephthalate-adipate copolymer (hereinafter, this polyester resin is referred to as “PES-2”)
(6) PTT US DuPont product name “Sorona (registered trademark)”, polytrimethylene terephthalate (hereinafter, this polyester resin is referred to as “PTT”)
<芯鞘型複合繊維の製造>
表1の紡糸条件で、複合紡糸を行い、芯鞘型複合繊維を得、延伸し、トウとした。紡糸条件及び延伸条件は下記のとおりとし、下記以外は表1にまとめて示した。
(1)紡糸温度:ポリオレフィン樹脂の紡糸温度:270℃、ポリエステル樹脂の紡糸温度:270℃
(2)延伸条件:55℃の温水浴中にて3.0〜3.5倍に湿式延伸
(3)延伸後の緊張熱処理セット:95℃の熱水浴中に、両端をニップロールで押さえた状態で、延伸倍率1.1倍にて熱水浴中を通過させ、トウに対し緊張熱セットを行った。
(4)捲縮付与:クリンパーを用いた機械的圧縮による捲縮付与
(5)乾燥:110℃、15分間の熱風乾燥
(6)延伸〜乾燥工程までトウ状態(連続した繊維束の状態)とし、その後38mmの長さに切断した。
<Manufacture of core-sheath type composite fiber>
Composite spinning was carried out under the spinning conditions shown in Table 1 to obtain a core-sheath type composite fiber, which was drawn to obtain a tow. The spinning conditions and the drawing conditions were as follows, and the conditions other than the following were summarized in Table 1.
(1) Spinning temperature: Polyolefin resin spinning temperature: 270 ° C., Polyester resin spinning temperature: 270 ° C.
(2) Stretching conditions: 3.0 to 3.5 times wet stretching in a hot water bath at 55 ° C. (3) Tension heat treatment set after stretching: Both ends were pressed with nip rolls in a hot water bath at 95 ° C. In the state, it was passed through a hot water bath at a draw ratio of 1.1 times, and tension heat setting was performed on the tow.
(4) Crimping: Crimping by mechanical compression using a crimper (5) Drying: Hot air drying for 15 minutes at 110 ° C. (6) Tow state (continuous fiber bundle state) from stretching to drying process Then, it was cut into a length of 38 mm.
<染色性評価>
得られた芯鞘型複合繊維について、分散染料を用いて染色し、染色性を評価した。染色性の評価は下記のように得られた芯鞘型複合繊維を用いて水流交絡不織布を作製し、これを染色することで評価した。
(1)得られた実施例1〜9、比較例1、2の芯鞘型複合繊維をパラレルカード機に投入し、これらの芯鞘型複合繊維からなる目付が100g/m2のカードウェブとする。
(2)前記カードウェブに対し、ニードルパンチ処理を行い、さらに両表面に対し水流交絡処理を行い、乾燥させて水流交絡不織布を得る。
(3)前記水流交絡不織布に対し、分散染料(日本化薬株式会社製 Kayalon(登録商標) Polyester Black):8%o.w.f(o.w.fはon the weight of fiberの略)、染色助剤:2g/L、酢酸:0.5cc/L、浴比1:15になるように染液を調整し、120℃で1時間染色する。
(4)前記染色条件で染色した不織布に対し、還元洗浄をおこなった。還元洗浄は、ハイドロサルファイト(亜二チオン酸ナトリウム):2g/L、水酸化ナトリウム(38Be):4.5cc/L、ソーピング剤:2.5g/L、浴比1:15になるように調整し、80℃で20分間還元洗浄する。
(5)還元洗浄が終了した後十分に水洗し、乾燥させた。
(6)染色された水流交絡不織布に対し、前記の手順で染色濃度、芯鞘剥離について評価を行った。
<Dyeability evaluation>
The obtained core-sheath type composite fiber was dyed with a disperse dye and evaluated for dyeability. Evaluation of dyeability was evaluated by preparing a hydroentangled nonwoven fabric using the core-sheath type composite fiber obtained as follows and dyeing this.
(1) The obtained core-sheath type composite fibers of Examples 1 to 9 and Comparative Examples 1 and 2 were put into a parallel card machine, and a card web having a basis weight of 100 g / m 2 made of these core-sheath type composite fibers and To do.
(2) A needle punching process is performed on the card web, a hydroentanglement process is performed on both surfaces, and the card web is dried to obtain a hydroentangled nonwoven fabric.
(3) Disperse dye (Nippon Kayaku Co., Ltd. Kayalon (registered trademark) Polyester Black): 8% owf (owf is an abbreviation of on the weight of fiber), dyeing assistant: 2 g / L Acetic acid: 0.5 cc / L, adjust the dyeing solution so that the bath ratio is 1:15, and dye at 120 ° C. for 1 hour.
(4) Reduction cleaning was performed on the nonwoven fabric dyed under the above dyeing conditions. Reduction cleaning is performed so that hydrosulfite (sodium dithionite): 2 g / L, sodium hydroxide (38Be): 4.5 cc / L, soaping agent: 2.5 g / L, bath ratio 1:15 Adjust and wash at 80 ° C. for 20 minutes.
(5) After the reduction cleaning was completed, it was thoroughly washed with water and dried.
(6) With respect to the dyed hydroentangled nonwoven fabric, the dyeing concentration and the core-sheath peeling were evaluated by the above procedure.
実施例1〜9の芯鞘型複合繊維と比較例1、2の芯鞘型複合繊維を比較すると、実施例1〜9の芯鞘型複合繊維はいずれの繊維も良好な染色堅牢度を示し、洗濯試験後も明瞭な濃色を呈していることがわかる。特に実施例1〜8の芯鞘型複合繊維は洗濯試験後においても大きな退色が生じていない。これは、実施例1〜9の芯鞘型複合繊維は繊維表面が染色性のないポリプロピレン樹脂であるにもかかわらず芯鞘型複合繊維全体に占める量を65質量%以下にしたことで、鞘成分、すなわち芯鞘型複合繊維の表面を覆うポリプロピレンが薄い膜状になり、かつポリプロピレンの厚さが薄いために分散染料が浸透、透過し、可染性の高い芯成分のポリエステル樹脂を染色したためと推測される。これを裏付けるように、芯鞘型複合繊維の側周面から撮影した図4、芯鞘型複合繊維の繊維断面を撮影した図5では、芯鞘型複合繊維の外側近傍の部分、すなわちポリプロピレンで構成された部分は染色されていないが、芯鞘型複合繊維の中心部分、すなわちポリエステルで構成された部分は濃色に染色されていることが確認できる。 When the core-sheath type composite fibers of Examples 1-9 and the core-sheath type composite fibers of Comparative Examples 1 and 2 were compared, the core-sheath type composite fibers of Examples 1-9 showed good dyeing fastness. It can be seen that a clear dark color is exhibited even after the washing test. In particular, the core-sheath type composite fibers of Examples 1 to 8 did not cause large fading even after the washing test. This is because the core-sheath type composite fibers of Examples 1 to 9 have an amount of 65% by mass or less of the total amount of the core-sheath type composite fibers despite the fact that the fiber surface is a polypropylene resin having no dyeability. The component, that is, the polypropylene covering the surface of the core-sheath type composite fiber has a thin film shape, and since the thickness of the polypropylene is thin, the disperse dye penetrates and permeates and dyes the highly dyeable core component polyester resin. It is guessed. In order to support this, FIG. 4 taken from the side peripheral surface of the core-sheath type composite fiber, and FIG. 5 taken a cross section of the core-sheath type composite fiber, a portion near the outside of the core-sheath type composite fiber, that is, polypropylene. Although the comprised part is not dye | stained, it can confirm that the center part of a core-sheath-type composite fiber, ie, the part comprised with polyester, is dye | stained darkly.
これに対し、比較例1の芯鞘型複合繊維は染色処理を行ったものの、染色濃度が実施例1〜9の芯鞘型複合繊維と比較して薄く、濃色の衣料としては使用が難しいものであった。これは、比較例1の芯鞘型複合繊維に占めるポリプロピレンの割合が65質量%を超えていたことで鞘成分が厚くなりすぎたこと、ポリエステルの割合が35質量%未満になったことで、ポリエステルそのものは濃色に染色されているものの、芯鞘型複合繊維全体としては色が薄くなり、濃色に染色されなかったことが要因として考えられる。一方、比較例2の芯鞘型複合繊維は洗濯処理後も明瞭な濃色を示し、高い染色堅牢度を示していたが、不織布表面を走査型電子顕微鏡にて確認すると、芯鞘型複合繊維の芯成分と鞘成分が剥離する、いわゆる芯鞘剥離、及びフィブリル化が発生していた。この芯鞘型複合繊維では、鞘成分を構成するポリプロピレン樹脂の割合が、芯鞘型複合繊維に対して25質量%未満となっているため、ポリプロピレン樹脂、すなわち鞘成分の厚さが極端に薄くなる。その結果、分散染料が芯鞘型複合繊維の鞘成分を透過しやすくなる。その結果、芯鞘型複合繊維の内部に存在する可染性樹脂が染色されやすくなるものの、鞘成分が割けやすくなり、洗濯処理の際に加えられる外部からの力によって芯鞘剥離、およびフィブリル化が発生しやすくなったためと考えられる。 On the other hand, although the core-sheath type composite fiber of Comparative Example 1 was subjected to a dyeing treatment, the dyeing concentration was thinner than the core-sheath type composite fibers of Examples 1 to 9, and it was difficult to use as dark clothing. It was a thing. This is because the ratio of polypropylene in the core-sheath composite fiber of Comparative Example 1 exceeded 65% by mass, the sheath component became too thick, and the ratio of polyester was less than 35% by mass. Although the polyester itself is dyed in a dark color, the core-sheath composite fiber as a whole is light in color, and it is considered that the polyester was not dyed in a dark color. On the other hand, the core-sheath type composite fiber of Comparative Example 2 showed a clear dark color even after the washing treatment, and showed high dyeing fastness. When the surface of the nonwoven fabric was confirmed with a scanning electron microscope, the core-sheath type composite fiber was So-called core-sheath peeling and fibrillation occurred in which the core component and the sheath component peeled off. In this core-sheath type composite fiber, since the ratio of the polypropylene resin constituting the sheath component is less than 25% by mass with respect to the core-sheath type composite fiber, the thickness of the polypropylene resin, that is, the sheath component is extremely thin. Become. As a result, the disperse dye can easily permeate the sheath component of the core-sheath composite fiber. As a result, although the dyeable resin existing inside the core-sheath composite fiber is easily dyed, the sheath component is easily broken, and the core-sheath is peeled off and fibrillated by an external force applied during the washing process. This is thought to be due to the increased likelihood of
図2〜5は前記実施例及び比較例で得られた繊維の代表的な写真である。
(1)図2は実施例1の芯鞘型複合繊維からなるカードウェブにニードルパンチ処理を行った後、水流交絡処理を行い得られた不織布に対し、120℃、60分間の条件で染色した後、不織布表面を走査型電子顕微鏡にて200倍に拡大して観察し、撮影した写真である。この写真から明らかなとおり、繊維はフィブリル化等の損傷は見られず、良好な繊維形状を示していることがわかる。
(2)図3は比較例2の芯鞘型複合繊維からなるカードウェブにニードルパンチ処理を行った後、水流交絡処理を行い得られた不織布に対し、120℃、60分間の条件で染色した後、不織布表面を走査型電子顕微鏡にて200倍に拡大して観察し、撮影した写真である。繊維にはフィブリル化等の損傷が発生していることがわかる。
(3)図4は実施例2の芯鞘型複合繊維を下記条件(120℃、60分間)にて染色した後、光学顕微鏡(透過光)にて繊維側周面を2000倍に拡大して観察し、撮影した写真である。繊維はフィブリル化等の損傷は見られず、良好に染色されていた。
(4)図5は実施例2の芯鞘型複合繊維を下記条件(120℃、60分間)にて染色した後、光学顕微鏡(透過光)にて繊維断面を2000倍に拡大して観察し、撮影した写真である。繊維の芯成分が良好に染色されていることが分かる。
2 to 5 are representative photographs of the fibers obtained in the examples and comparative examples.
(1) In FIG. 2, the card web made of the core-sheath composite fiber of Example 1 was subjected to needle punching and then subjected to hydroentanglement, and the nonwoven fabric obtained was dyed under conditions of 120 ° C. and 60 minutes. Then, it is the photograph which observed the nonwoven fabric surface magnified 200 times with the scanning electron microscope, and was image | photographed. As is clear from this photograph, it is understood that the fiber is not damaged such as fibrillation and has a good fiber shape.
(2) In FIG. 3, the card web made of the core-sheath composite fiber of Comparative Example 2 was subjected to needle punching, and then subjected to hydroentanglement, and the nonwoven fabric obtained was dyed at 120 ° C. for 60 minutes. Then, it is the photograph which observed the nonwoven fabric surface magnified 200 times with the scanning electron microscope, and was image | photographed. It can be seen that the fiber is damaged such as fibrillation.
(3) In FIG. 4, after dyeing the core-sheath type composite fiber of Example 2 under the following conditions (120 ° C., 60 minutes), the optical fiber (transmitted light) was used to enlarge the fiber side peripheral surface by 2000 times. It is a photograph that was observed and taken. The fibers were well dyed without any damage such as fibrillation.
(4) FIG. 5 shows the core-sheath composite fiber of Example 2 dyed under the following conditions (120 ° C., 60 minutes), and then observed with an optical microscope (transmitted light) at a magnification of 2000 times. This is a photograph taken. It can be seen that the fiber core component is well dyed.
本発明の芯鞘型複合繊維は、衣類、寝装具の側地、毛布、ひざ掛け又はカーペット等の繊維製品に好適である。衣類としては、例えば、肌着、下着、シャツ、ジャンパー、セーター、パンツ、トレーニングウエア、タイツ、腹巻、マフラー、帽子、手袋、靴下、耳あて等がある。防寒衣料、スポーツウエア、衣料用詰め綿等にも好適である。さらにフリース等のように生地表面を起毛しても良い。 The core-sheath type composite fiber of the present invention is suitable for textile products such as clothing, bedding linings, blankets, rugs and carpets. Examples of clothing include underwear, underwear, shirts, jumpers, sweaters, pants, training wear, tights, stomachbands, mufflers, hats, gloves, socks, ear pads, and the like. It is also suitable for cold clothing, sportswear, stuffed cotton. Further, the surface of the fabric may be raised like a fleece.
1 芯鞘型複合繊維
2 芯成分(ポリエステル)
3 鞘成分(ポリプロピレン)
1 Core-sheath type composite fiber 2 Core component (polyester)
3 sheath component (polypropylene)
Claims (9)
前記芯成分は少なくとも脂肪族ジカルボン酸成分が共重合体成分として含まれ、融点が180℃以上250℃以下の共重合ポリエステルであり、
前記鞘成分はポリオレフィンであり、
前記芯鞘型複合繊維を100質量%としたとき、前記鞘成分は25質量%以上65質量%以下であることを特徴とする芯鞘型複合繊維。 A core-sheath type composite fiber including a core component and a sheath component,
The core component is a copolyester having at least an aliphatic dicarboxylic acid component as a copolymer component and a melting point of 180 ° C. or higher and 250 ° C. or lower,
The sheath component is a polyolefin;
The core-sheath type composite fiber, wherein the sheath component is 25% by mass or more and 65% by mass or less when the core-sheath type composite fiber is 100% by mass.
前記芯鞘型複合繊維(A)とその他の繊維(B)の混合割合が質量%で10≦A≦100、0≦B≦90の範囲であることを特徴とする繊維構造物。 A fiber structure (A) comprising the core-sheath type conjugate fiber according to any one of claims 1 to 5, or a fiber structure comprising the core-sheath type conjugate fiber (A) and another fiber (B). And
A fiber structure characterized in that the mixing ratio of the core-sheath composite fiber (A) and the other fibers (B) is in a range of 10 ≦ A ≦ 100 and 0 ≦ B ≦ 90 in terms of mass%.
前記繊維構造物を、分散染料を用いて温度110〜130℃の範囲で染色することを特徴とする繊維構造物の製造方法。 It is a manufacturing method of the fiber structure given in any 1 paragraph of Claims 6-8,
A method for producing a fiber structure, wherein the fiber structure is dyed using a disperse dye in a temperature range of 110 to 130 ° C.
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