JP2001115340A - Polyester hot-melting type conjugated staple fiber and non-woven fabric therefrom - Google Patents
Polyester hot-melting type conjugated staple fiber and non-woven fabric therefromInfo
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- JP2001115340A JP2001115340A JP28682599A JP28682599A JP2001115340A JP 2001115340 A JP2001115340 A JP 2001115340A JP 28682599 A JP28682599 A JP 28682599A JP 28682599 A JP28682599 A JP 28682599A JP 2001115340 A JP2001115340 A JP 2001115340A
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- component
- heat
- nonwoven fabric
- fiber
- polyester
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- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、短繊維からなる乾
式不織布や湿式不織布等の不織布分野において、柔軟性
と耐熱性を有する不織布を得るのに好適なポリエステル
系熱接着性複合短繊維、及びこれから得られる不織布に
関するものである。The present invention relates to a polyester-based heat-adhesive conjugate short fiber suitable for obtaining a nonwoven fabric having flexibility and heat resistance in the field of nonwoven fabrics such as dry nonwoven fabrics and wet nonwoven fabrics comprising short fibers, and The present invention relates to a nonwoven fabric obtained therefrom.
【０００２】[0002]
【従来の技術】合成繊維、特にポリエステル繊維は、そ
の優れた寸法安定性、耐候性、機械的特性、耐久性、さ
らにはリサイクル性等の点から、衣料、産業資材として
不可欠のものとなっており、不織布分野においても、多
く使用されている。このポリエステル繊維からなる不織
布分野において、最近、柔軟性と耐熱性を兼ね備えた不
織布が要望されている。2. Description of the Related Art Synthetic fibers, especially polyester fibers, have become indispensable as clothing and industrial materials because of their excellent dimensional stability, weather resistance, mechanical properties, durability and recyclability. It is widely used in the nonwoven fabric field. In the field of nonwoven fabrics made of polyester fibers, recently, nonwoven fabrics having both flexibility and heat resistance have been demanded.
【０００３】従来のポリエステル系短繊維からなる不織
布には、主体繊維を熱接着するために熱接着性複合短繊
維が使用されており、一般的には、芯部にポリエチレン
テレフタレート（以下、ＰＥＴと略する。）、鞘部にイ
ソフタル酸（以下、ＩＰＡと略する。）を共重合した低
融点ポリマ−を配した熱接着性複合短繊維が用いられて
いる。しかし、この熱接着性複合短繊維の芯成分に使用
しているＰＥＴは、ポリマー自体の剛性が高いため、不
織布に柔軟性を付与することが困難であった。[0003] In a conventional nonwoven fabric made of polyester-based short fibers, a heat-adhesive conjugate short fiber is used for heat-bonding the main fibers, and generally, polyethylene terephthalate (hereinafter referred to as PET) is used for a core. A short heat-adhesive conjugate fiber having a low melting point polymer obtained by copolymerizing isophthalic acid (hereinafter abbreviated as IPA) in a sheath portion is used. However, the PET used as the core component of the heat-adhesive conjugate short fiber has difficulty in imparting flexibility to the nonwoven fabric because the rigidity of the polymer itself is high.
【０００４】また、熱接着性複合短繊維の繊度を小さく
することにより、繊維のヤング率を小さくし、不織布に
柔軟性を付与することも数多く試みられている。しか
し、製糸工程において１ｄｔｅｘ前後の細繊度繊維を得
ようとすると、操業性の悪化を招いたり、製糸工程が煩
雑なものとなったりするなど、容易に熱接着性複合短繊
維を得ることは困難であった。[0004] Also, many attempts have been made to reduce the fineness of the heat-adhesive conjugate staple fiber, thereby reducing the Young's modulus of the fiber and imparting flexibility to the nonwoven fabric. However, it is difficult to easily obtain a heat-adhesive conjugate short fiber, for example, when trying to obtain a fine fiber of about 1 dtex in the spinning process, the operability is deteriorated, and the spinning process becomes complicated. Met.
【０００５】一方、不織布に耐熱性を付与するために、
特開平７−１１９０１１号公報や特開平９−１３２８５
０号公報には、芯部にＰＥＴ、鞘部にテレフタル酸成
分、脂肪族ラクトン成分、エチレングリコ−ル成分及び
１，４−ブタンジオ−ル成分を共重合した低融点ポリマ
−を配した熱接着性複合短繊維を用いることが提案され
ている。しかし、この熱接着性複合短繊維は、耐熱性に
ついては従来のポリエステル系熱接着性複合短繊維より
も良好であるが、芯成分にＰＥＴを使用しているため、
繊維は柔軟性に乏しいものとなり、不織布も十分な柔軟
性を有するものではなかった。On the other hand, in order to impart heat resistance to the nonwoven fabric,
JP-A-7-119011 and JP-A-9-13285
Japanese Patent Application Publication No. JP-A No. 0-204,088 discloses a heat bonding method in which a PET is provided on a core, and a low-melting polymer obtained by copolymerizing a terephthalic acid component, an aliphatic lactone component, an ethylene glycol component and a 1,4-butanediol component is provided on a sheath portion. It has been proposed to use conductive composite short fibers. However, this heat-adhesive conjugate staple fiber has better heat resistance than the conventional polyester-based heat-adhesive conjugate staple fiber, but uses PET for the core component.
The fibers became poor in flexibility, and the non-woven fabric also did not have sufficient flexibility.
【０００６】このように、不織布に柔軟性と耐熱性を付
与することが容易に可能である熱接着性複合短繊維は、
未だ得られていないのが現状である。As described above, the heat-adhesive conjugate short fibers that can easily impart flexibility and heat resistance to the nonwoven fabric are as follows:
At present, it has not been obtained yet.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、このような
従来の熱接着性複合短繊維とこれを含む不織布の欠点を
解消し、優れた柔軟性と耐熱性を有する不織布を得るこ
とができる熱接着性複合短繊維及びその不織布を提供す
ることを技術的な課題とするものである。SUMMARY OF THE INVENTION According to the present invention, the disadvantages of the conventional heat-adhesive conjugate short fibers and the nonwoven fabric containing the same can be solved, and a nonwoven fabric having excellent flexibility and heat resistance can be obtained. An object of the present invention is to provide a heat-bondable composite short fiber and a nonwoven fabric thereof.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記の課
題を解決するために鋭意検討を行った結果、熱接着性複
合短繊維の構成ポリマーに着目し、複合短繊維の芯成分
にトリメチレンテレフタレートを主たる繰り返し単位と
するポリマーを用い、鞘成分にテレフタル酸成分、脂肪
族ラクトン成分、エチレングリコ−ル成分及び１，４−
ブタンジオ−ル成分を共重合した低融点ポリマ−を用い
ることによって、不織布に優れた柔軟性と耐熱性を付与
することができるということを見出して本発明に到達し
た。Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, focused on the constituent polymer of the heat-adhesive conjugate short fiber, and focused on the core component of the conjugate short fiber. Using a polymer having trimethylene terephthalate as a main repeating unit, a terephthalic acid component, an aliphatic lactone component, an ethylene glycol component and 1,4-
The present inventors have found that the use of a low-melting-point polymer obtained by copolymerizing a butanediol component can impart excellent flexibility and heat resistance to a nonwoven fabric.
【０００９】すなわち、本発明は、次の構成を有するも
のである。 (1) 芯部がトリメチレンテレフタレートを主たる繰り返
し単位とするポリエステル、鞘部がテレフタル酸成分、
脂肪族ラクトン成分、エチレングリコ−ル成分及び１，
４−ブタンジオ−ル成分からなり、ガラス転移点（以
下、Ｔｇと略する。）２０〜８０℃、結晶化温度（以
下、Ｔｃと略する。）９０〜１３０℃、融点（以下、Ｔ
ｍと略する。）１３０〜１８０℃である共重合ポリエス
テルで構成された芯鞘型複合繊維であって、ヤング率が
４４ｃＮ／ｄｔｅｘ以下であることを特徴とするポリエ
ステル系熱接着性複合短繊維。 (2) 上記(1) 記載のポリエステル系熱接着性複合短繊維
を含み、剛軟度が６０ｃＮ以下であることを特徴とする
不織布。That is, the present invention has the following configuration. (1) a polyester having a core having trimethylene terephthalate as a main repeating unit, a sheath having a terephthalic acid component,
Aliphatic lactone component, ethylene glycol component and 1,
It is composed of a 4-butanediol component, and has a glass transition point (hereinafter abbreviated as Tg) of 20 to 80 ° C., a crystallization temperature (hereinafter abbreviated as Tc) of 90 to 130 ° C., and a melting point (hereinafter, T).
Abbreviated as m. A) a polyester-based heat-adhesive conjugate short fiber comprising a core-sheath type conjugate fiber composed of a copolymerized polyester at 130 to 180 ° C and having a Young's modulus of 44 cN / dtex or less. (2) A nonwoven fabric comprising the polyester-based heat-adhesive conjugate short fibers according to (1) and having a stiffness of 60 cN or less.
【００１０】[0010]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明の熱接着性複合短繊維の芯成分に用いるポ
リマ−は、トリメチレンテレフタレートを主たる繰り返
し単位とするポリエステルであることが必要である。Ｐ
ＥＴのようにエチレンテレフタレートを主たる繰り返し
単位とするポリエステルでは、複合繊維としてのヤング
率が高く、得られる不織布の風合いが硬くなり好ましく
ない。また、不織布の風合いを柔らかくするために、芯
成分にポリアミドを使用することが考えられるが、ポリ
アミドは鞘成分のポリマ−と相溶性が悪いため、製糸工
程で操業性が悪化したり、不織布の強力が低いものとな
るので好ましくない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The polymer used as the core component of the heat-adhesive conjugate short fiber of the present invention must be a polyester containing trimethylene terephthalate as a main repeating unit. P
Polyesters containing ethylene terephthalate as a main repeating unit, such as ET, have a high Young's modulus as a conjugate fiber, and the texture of the obtained nonwoven fabric becomes undesirably hard. Further, in order to soften the texture of the nonwoven fabric, it is conceivable to use polyamide as the core component.However, since polyamide has poor compatibility with the polymer of the sheath component, the operability is deteriorated in the spinning process, It is not preferable because the strength is low.
【００１１】また、上記ポリエステルは、本発明の効果
を損なわない範囲であれば、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、ビスフ
ェノールＡのエチレンオキシド付加体などの芳香族ジオ
ール成分、アジピン酸やセバシン酸などの脂肪族ジカル
ボン酸成分、ＩＰＡなどの芳香族ジカルボン酸成分など
を共重合したものでもよく、さらに、安定剤、蛍光剤、
顔料、抗菌剤、消臭剤、強化剤などを添加したものでも
よい。The above-mentioned polyester may be 1,4-butanediol, as long as the effects of the present invention are not impaired.
A diol component such as 1,6-hexanediol, an aromatic diol component such as an ethylene oxide adduct of bisphenol A, an aliphatic dicarboxylic acid component such as adipic acid and sebacic acid, and an aromatic dicarboxylic acid component such as IPA were copolymerized. May be used, furthermore, a stabilizer, a fluorescent agent,
Pigments, antibacterial agents, deodorants, enhancers and the like may be added.
【００１２】一方、本発明の熱接着性複合短繊維の鞘成
分を構成する共重合ポリエステルは、Ｔｇが２０〜８０
℃、Ｔｃが９０〜１３０℃、Ｔｍが１３０〜１８０℃で
あることが必要である。共重合ポリエステルのＴｇが２
０℃未満では、溶融紡糸時に単糸間の密着が発生し、製
糸性が悪くなる。また、Ｔｇが８０℃を超えると、製糸
工程において高温で延伸することが必要になり、延伸に
よる塑性変形と同時に部分的な結晶化が始まり、芯部と
鞘部との間で結晶化に差異が生じるため繊維構造に斑が
生じ、糸切れが発生するなど、延伸性が低下する。On the other hand, the copolyester constituting the sheath component of the heat-adhesive conjugate short fiber of the present invention has a Tg of 20 to 80.
° C, Tc must be 90-130 ° C, and Tm must be 130-180 ° C. Tg of copolymerized polyester is 2
If the temperature is lower than 0 ° C., adhesion between the single yarns occurs during melt spinning, and the spinnability deteriorates. On the other hand, if the Tg exceeds 80 ° C., it is necessary to perform stretching at a high temperature in the spinning process, and partial crystallization starts simultaneously with plastic deformation due to stretching, and the difference in crystallization between the core and the sheath increases. This causes unevenness in the fiber structure and breakage of the yarn, thereby deteriorating the stretchability.
【００１３】また、共重合ポリエステルのＴｃが９０℃
未満では、熱延伸工程において結晶化が進行してしまう
ため、次の熱処理工程において安定な結晶構造を再構築
することが困難となり、Ｔｃが１３０℃を超えるとＴｍ
も並行して高まり、２３０℃以上で熱処理する必要が生
じて熱接着処理時に芯成分の分解が起こりやすくなり、
また、高温熱接着処理が必要となるので経済的にも好ま
しくない。The copolymerized polyester has a Tc of 90 ° C.
If the temperature is less than 130 ° C., it is difficult to reconstruct a stable crystal structure in the next heat treatment step.
Also increases in parallel, it becomes necessary to heat-treat at 230 ° C. or higher, and the core component is easily decomposed at the time of the heat bonding process,
Further, high temperature heat bonding is required, which is not economically preferable.
【００１４】さらに、共重合ポリエステルのＴｍが１３
０℃未満では、たとえ繊維化しても、高温雰囲気下で使
用した場合、耐熱性を得ることができない。一方、Ｔｍ
が１８０℃を超えると、不織布化する際の高温下での熱
処理により芯成分の分解が起こりやすくなり、不織布性
能が低下するとともに、高温熱接着処理が必要になるの
で経済的にも好ましくない。Further, the Tm of the copolymerized polyester is 13
If the temperature is lower than 0 ° C., heat resistance cannot be obtained when used in a high-temperature atmosphere, even if the fibers are formed. On the other hand, Tm
If the temperature exceeds 180 ° C., the heat treatment at a high temperature during the formation of the nonwoven fabric tends to cause the decomposition of the core component, the performance of the nonwoven fabric decreases, and a high-temperature heat bonding treatment is required, which is economically undesirable.
【００１５】鞘成分を構成する共重合ポリエステルは、
上記の物性となるように選定され、テレフタル酸成分、
脂肪族ラクトン成分、エチレングリコ−ル成分、１，４
−ブタンジオ−ル成分を重合することにより得ることが
できる。The copolymerized polyester constituting the sheath component is as follows:
The terephthalic acid component is selected to have the above physical properties,
Aliphatic lactone component, ethylene glycol component, 1,4
-Can be obtained by polymerizing a butanediol component.
【００１６】ここで、脂肪族ラクトン成分の割合は酸成
分（テレフタル酸成分及び脂肪族ラクトン成分の合計）
の１０〜２０ｍｏｌ％となるようにすることが望まし
い。脂肪族ラクトン成分が１０ｍｏｌ％未満では結晶性
はよくなるが、Ｔｍが１８０℃を超え、不織布化する際
の高温下での熱処理により芯成分の分解が起こりやすく
なり、不織布性能が低下するため好ましくない。また、
２０ｍｏｌ％を超えると紡糸時に密着が発生し、製糸性
が低下しやすい。前述した熱特性を満足しうる脂肪族ラ
クトン成分としては、炭素数４〜１１のラクトンが好ま
しく、中でも好適なラクトンとして、ε−カプロラクト
ンやδ−バレロラクトンが挙げられる。Here, the proportion of the aliphatic lactone component is the acid component (total of the terephthalic acid component and the aliphatic lactone component).
Is desirably 10 to 20 mol%. When the aliphatic lactone component is less than 10 mol%, the crystallinity is improved, but the Tm exceeds 180 ° C., and the core component is easily decomposed by heat treatment at a high temperature when forming the nonwoven fabric, and the nonwoven fabric performance is unfavorably reduced. . Also,
If it exceeds 20 mol%, adhesion occurs at the time of spinning, and the spinnability tends to decrease. As the aliphatic lactone component capable of satisfying the above-mentioned thermal characteristics, a lactone having 4 to 11 carbon atoms is preferable. Among them, ε-caprolactone and δ-valerolactone are preferable.
【００１７】なお、共重合ポリエステルは、本発明の効
果を損なわない範囲で、イソフタル酸、フタル酸、アジ
ピン酸、セバシン酸、ジエチレングリコ−ル、トリエチ
レングリコ−ルなどの共重合成分を少量含有していても
よい。The copolymerized polyester contains a small amount of a copolymer component such as isophthalic acid, phthalic acid, adipic acid, sebacic acid, diethylene glycol, and triethylene glycol as long as the effects of the present invention are not impaired. May be.
【００１８】本発明の熱接着性複合短繊維における芯成
分と鞘成分との構成比は、芯成分／鞘成分（体積比）が
３０／７０〜７０／３０、特に４５／５５〜５５／４５
であることが好ましい。芯成分が７０％を超えると熱接
着性が低下し、さらには鞘成分の破断が発生しやすくな
り、紡糸操業性が低下するため好ましくない。一方、芯
成分が３０％未満では芯成分が有する柔軟性の効果が発
揮されないため、好ましくない。The constituent ratio of the core component and the sheath component in the heat-adhesive conjugate short fiber of the present invention is such that the core component / sheath component (volume ratio) is 30/70 to 70/30, particularly 45/55 to 55/45.
It is preferable that If the core component exceeds 70%, the thermal adhesiveness is reduced, and furthermore, the sheath component is easily broken, and the spinning operability is undesirably reduced. On the other hand, if the content of the core component is less than 30%, the effect of the flexibility of the core component is not exhibited, which is not preferable.
【００１９】また、本発明の熱接着性複合短繊維は、ヤ
ング率が４４ｃＮ／ｄｔｅｘ以下であることが必要であ
る。ヤング率が４４ｃＮ／ｄｔｅｘを超えると、得られ
る不織布の風合いが硬くなる。Further, the heat-adhesive conjugate short fiber of the present invention must have a Young's modulus of 44 cN / dtex or less. When the Young's modulus exceeds 44 cN / dtex, the texture of the obtained nonwoven fabric becomes hard.
【００２０】本発明の熱接着性複合短繊維は、例えば次
の方法で製造することができる。まず、上記した芯成分
と鞘成分を用いて、通常用いられる芯鞘型複合紡糸装置
により溶融紡糸し、芯鞘型の熱接着性複合未延伸糸を得
る。次いで、未延伸糸を集束した後、常法により延伸
し、必要に応じて押し込み式クリンパーにより機械捲縮
を付与し、仕上げ油剤を付与した後、用途に応じて３〜
１５０ｍｍに切断し、目的とする熱接着性複合短繊維と
する。The conjugate short fibers of the present invention can be produced, for example, by the following method. First, the above-mentioned core component and sheath component are melt-spun using a commonly used core-sheath type composite spinning apparatus to obtain a core-sheath type heat-adhesive composite undrawn yarn. Next, after the undrawn yarn is bundled, it is drawn by an ordinary method, and if necessary, mechanical crimping is performed by a press-in type crimper, and after finishing oil is applied, 3 to 3 depending on the use.
Cut to 150 mm to obtain the desired heat-adhesive conjugate short fibers.
【００２１】次に、本発明の不織布について説明する。
本発明の不織布は、上記した熱接着性複合短繊維を含む
ものであるが、剛軟度が６０ｃＮ以下であることが必要
であり、剛軟度が６０ｃＮを超えると、不織布の風合い
が硬くなる。また、本発明の不織布は、乾式不織布及び
湿式不織布のいずれでもよい。Next, the nonwoven fabric of the present invention will be described.
Although the nonwoven fabric of the present invention contains the above-mentioned heat-adhesive conjugate short fibers, the softness must be 60 cN or less, and if the softness exceeds 60 cN, the hand of the nonwoven fabric becomes hard. The nonwoven fabric of the present invention may be either a dry nonwoven fabric or a wet nonwoven fabric.
【００２２】次に、本発明の不織布を構成する主体繊維
は、不織布の剛軟度が６０ｃＮ以下であれば、特に限定
されるものではないが、ヤング率が４４ｃＮ／ｄｔｅｘ
以下のものが好ましく用いられる。主体繊維のヤング率
が４４ｃＮ／ｄｔｅｘを超えると、得られる不織布の風
合いが硬いものとなりやすい。具体的には、リサイクル
性や不織布の柔軟性の面から、トリメチレンテレフタレ
ートを主たる繰り返し単位とするポリエステル、特にポ
リトリメチレンテレフタレート（以下、ＰＴＴと略す
る。）短繊維が好ましい。また、不織布における熱接着
性複合短繊維の混率としては、１０〜７０重量％である
ことが好ましい。The main fiber constituting the nonwoven fabric of the present invention is not particularly limited as long as the nonwoven fabric has a softness of 60 cN or less, but its Young's modulus is 44 cN / dtex.
The following are preferably used. When the Young's modulus of the main fiber exceeds 44 cN / dtex, the texture of the obtained nonwoven fabric tends to be hard. Specifically, polyester having trimethylene terephthalate as a main repeating unit, particularly polytrimethylene terephthalate (hereinafter abbreviated as PTT) short fiber is preferable from the viewpoint of recyclability and flexibility of the nonwoven fabric. The mixing ratio of the heat-adhesive conjugate short fibers in the nonwoven fabric is preferably from 10 to 70% by weight.
【００２３】次に、本発明の不織布の製造例を示す。熱
接着性複合短繊維が１０〜７０重量％、好ましくは２５
〜５０重量％の割合となるように主体繊維と混綿し、カ
−ド機にかけウエブを作成する。このウエブを、熱接着
性複合短繊維の熱接着成分のＴｍ以上、熱接着成分のＴ
ｍ＋５０℃以下の温度に設定した熱処理装置で処理して
熱接着成分を溶融させ、不織布を作成する。Next, a production example of the nonwoven fabric of the present invention will be described. 10 to 70% by weight, preferably 25%, of the heat-adhesive conjugate short fibers
The cotton is blended with the main fiber so as to have a ratio of about 50% by weight, and a carding machine is used to prepare a web. This web is heated to at least the Tm of the heat bonding component of the thermoadhesive conjugate short fiber and the T
A heat treatment device set at a temperature of m + 50 ° C. or lower melts the heat bonding component to produce a nonwoven fabric.
【００２４】次いで、いったん室温まで冷却した後、熱
接着成分のＴｃ以上、熱接着成分のＴｃ＋３０℃以下の
温度で結晶化熱処理を行い、熱接着性複合短繊維の鞘成
分の結晶性を促進させ、目的とする不織布を得る。この
場合、熱処理の前にニ−ドリング加工を行ってもよい。
熱処理装置としては、熱風ドライヤ−、回転ドラム乾燥
機などが用いられる。Next, after cooling to room temperature, crystallization heat treatment is performed at a temperature not lower than Tc of the heat bonding component and not higher than Tc + 30 ° C. of the heat bonding component to promote the crystallinity of the sheath component of the heat bonding conjugate short fiber. To obtain the desired nonwoven fabric. In this case, needling may be performed before the heat treatment.
As the heat treatment apparatus, a hot air dryer, a rotary drum dryer, or the like is used.
【００２５】[0025]
【作用】熱接着性複合短繊維の芯部に用いるポリエステ
ルの主たる繰り返し単位をトリメチレンテレフタレート
とすることによって、剛性がＰＥＴより小さいものとな
るため、熱接着性複合短繊維は柔軟性に優れており、得
られる不織布も柔軟性に優れたものとなる。また、鞘部
に用いる共重合ポリエステルが結晶性であるため、耐熱
性のある不織布を得ることができる。When the main repeating unit of the polyester used for the core of the heat-adhesive conjugate staple is trimethylene terephthalate, the rigidity becomes smaller than that of PET. Therefore, the heat-adhesive conjugate staple has excellent flexibility. As a result, the resulting nonwoven fabric also has excellent flexibility. Further, since the copolymerized polyester used for the sheath portion is crystalline, a heat-resistant nonwoven fabric can be obtained.
【００２６】[0026]
【実施例】次に、本発明を実施例により具体的に説明す
る。なお、実施例中の性能評価は、下記方法に従って測
定したものである。 （１）Ｔｇ、Ｔｃ及びＴｍ パーキンエルマー社製示差走査型熱量計ＤＳＣ−７型を
用い、昇温速度２０℃／分で測定した。 （２）単糸繊度 ＪＩＳ Ｌ−１０１５の方法により測定した。 （３）不織布の目付 ＪＩＳ Ｐ−８１４２の方法により測定した。 （４）ヤング率 ＪＩＳ Ｌ−１０１５−７−１１の方法により測定し
た。 （５）不織布の耐熱性 不織布の作成条件 主体繊維：ポリエステル系短繊維（ＰＥＴ、ＰＴＴ）４
ｄｔｅｘ×５１ｍｍ 混 率：主体繊維／熱接着性複合短繊維＝７０／３０
（重量比） 処理温度：熱接着性複合短繊維の鞘成分のＴｍ＋３０℃
×１分 結晶化処理：（Ｔｃ＋２０）℃×２０分 目 付：５０ｇ／ｍ2 室温下での不織布強力（測定温度：２３℃） 不織布を幅２．５ｃｍ、長さ１５ｃｍの短冊状に切断
し、試料を作製した。この試料を測定温度２３℃で、オ
リエンテック社製ＵＴＭ−４型のテンシロンを用いて、
引っ張り速度１０ｃｍ／分の条件で伸長切断し、最大強
力を読み取った。 高温雰囲気下での不織布強力（測定温度：１１０℃） 不織布を幅２．５ｃｍ、長さ１５ｃｍの短冊状に切断
し、試料を作製した。この試料を温度１１０℃の恒温槽
で１分間放置後、オリエンテック社製ＵＴＭ−４型のテ
ンシロンを用いて、引っ張り速度１０ｃｍ／分の条件で
伸長切断し、最大強力を読み取った。 高温雰囲気下での強力保持率（％） 室温下での不織布強力（Ａ）と高温雰囲気下での不織布
強力（Ｂ）より、下記式で高温雰囲気下での強力保持率
を算出した。高温雰囲気下での強力保持率は、５０％以
上を耐熱性良好とした。 強力保持率（％）＝（Ｂ／Ａ）×１００ （６）不織布の柔軟性 ＪＩＳ Ｌ−１０９６の試料幅１０ｃｍ、試料長１０ｃ
ｍの試料片を３枚準備し、ＤＡＩＥＩ ＫＥＩＫＩ製風
合メータ（ＭＯＤＥＬ ＦＭ−２）を使用して評価し
た。まず、１５ｍｍ幅のスリット上に試料片を置いて、
アームが試料をスリット間に押し込む時に、最高何ｃＮ
の力が必要かを試料の表裏について、縦横方向、４個所
で測定し、その合計値を求めた。試料片３枚の平均値を
不織布剛軟度（ｃＮ）として評価した。なお、剛軟度が
６０ｃＮ未満を合格とした。 （７）総合評価 ○：不織布の高温雰囲気下での強力保持率が５０％以上
で、剛軟度が６０ｃＮ未満。 ×：不織布の高温雰囲気下での強力保持率、剛軟度の少
なくとも一方が劣っている。Next, the present invention will be described in detail with reference to examples. The performance evaluation in the examples was measured according to the following method. (1) Tg, Tc and Tm Measured at a heating rate of 20 ° C./min using a differential scanning calorimeter DSC-7 manufactured by PerkinElmer. (2) Single yarn fineness It was measured by the method of JIS L-1015. (3) Weight of nonwoven fabric Measured according to the method of JIS P-8142. (4) Young's modulus Measured according to the method of JIS L-1015-7-11. (5) Heat resistance of nonwoven fabric Fabrication conditions of nonwoven fabric Main fiber: polyester short fiber (PET, PTT) 4
dtex × 51 mm mixing ratio: main fiber / thermo-adhesive composite short fiber = 70/30
(Weight ratio) Treatment temperature: Tm of sheath component of heat-adhesive conjugate short fiber + 30 ° C
× 1 minute Crystallization treatment: (Tc + 20) ° C. × 20 minutes Weight: 50 g / m 2 Non-woven fabric strength at room temperature (measuring temperature: 23 ° C.) The non-woven fabric is cut into strips having a width of 2.5 cm and a length of 15 cm. A sample was prepared. The sample was measured at a measurement temperature of 23 ° C. by using Orientec UTM-4 type Tensilon,
The sheet was stretched and cut at a pulling speed of 10 cm / min, and the maximum strength was read. Strength of nonwoven fabric in high-temperature atmosphere (measuring temperature: 110 ° C.) The nonwoven fabric was cut into a strip having a width of 2.5 cm and a length of 15 cm to prepare a sample. After leaving this sample in a thermostat at a temperature of 110 ° C. for 1 minute, it was subjected to elongation cutting at a pulling rate of 10 cm / min using a UTM-4 type Tensilon manufactured by Orientec, and the maximum strength was read. Strength retention in high temperature atmosphere (%) The strength retention in a high temperature atmosphere was calculated from the following formula from the strength of the nonwoven fabric at room temperature (A) and the strength of the nonwoven fabric in a high temperature atmosphere (B). The heat retention of 50% or more in the high-temperature atmosphere was regarded as good heat resistance. Strength retention (%) = (B / A) × 100 (6) Flexibility of nonwoven fabric JIS L-1096 sample width 10 cm, sample length 10 c
Three sample pieces of m were prepared and evaluated using a feeling meter (MODEL FM-2) manufactured by DAIEI KEIKI. First, place a sample piece on a 15 mm wide slit,
When the arm pushes the sample between the slits, the maximum cN
The force was measured at four points in the vertical and horizontal directions on the front and back of the sample, and the total value was determined. The average value of three sample pieces was evaluated as the nonwoven fabric softness (cN). In addition, the softness | flexibility was set to less than 60 cN as pass. (7) Comprehensive evaluation ：: The strength retention of the nonwoven fabric in a high-temperature atmosphere is 50% or more, and the softness is less than 60 cN. ×: At least one of the strength retention and the softness of the nonwoven fabric in a high-temperature atmosphere is inferior.
【００２７】実施例１ 芯成分を構成するポリマ−として融点２３０℃、〔η〕
が０．９２のＰＴＴ、鞘成分を構成するポリマ−とし
て、テレフタル酸、ε−カプロラクトン（以下、ε−Ｃ
Ｌと略する。）、エチレングリコ−ル、１，４−ブタン
ジオ−ルからなり、Ｔｇ４０℃、Ｔｃ９４℃、Ｔｍ１６
０℃の共重合ポリエステルを用い、溶融紡糸設備を用い
て紡糸し、紡糸温度２７０℃、吐出量６４２ｇ／分、紡
糸速度７００ｍ／分で引き取り、芯鞘型の未延伸糸を得
た。この未延伸糸を集束し、１１万ｄｔｅｘのトウにし
て延伸倍率３．８倍、延伸温度５５℃で延伸を行い、押
し込み式クリンパーで捲縮を付与した後、切断して単糸
繊度４．４ｄｔｅｘ、繊維長５１ｍｍの熱接着性複合短
繊維を得た。Example 1 The polymer constituting the core component had a melting point of 230 ° C. and [η].
Is PTT of 0.92, and terephthalic acid, ε-caprolactone (hereinafter referred to as ε-C
Abbreviated as L. ), Ethylene glycol, 1,4-butanediol, Tg 40 ° C, Tc 94 ° C, Tm16
Spinning was performed using a copolymerized polyester at 0 ° C. using a melt spinning facility, and the fiber was drawn at a spinning temperature of 270 ° C., a discharge rate of 642 g / min, and a spinning speed of 700 m / min to obtain a core-sheath type undrawn yarn. This undrawn yarn is bundled, drawn into a tow of 110,000 dtex, drawn at a draw ratio of 3.8 times, at a drawing temperature of 55 ° C., crimped with a push-in type crimper, and then cut to obtain a single fiber fineness of 4. 4 dtex, a heat-adhesive conjugate short fiber having a fiber length of 51 mm was obtained.
【００２８】得られた熱接着性複合短繊維３０重量％
と、主体繊維として繊度４．４ｄｔｅｘ、繊維長５１ｍ
ｍのＰＴＴ短繊維７０重量％を混綿し、カード機にかけ
ウエブとした後、連続熱処理機にて１９０℃、１分間の
熱処理を行い、冷却後、１１４℃×２０分の結晶化熱処
理を行って、目付５０ｇ／ｍ2 の不織布を得た。得られ
た熱接着性複合短繊維と不織布の諸物性を表１、表２に
示す。30% by weight of the obtained heat-adhesive composite short fiber
And a fineness of 4.4 dtex as the main fiber and a fiber length of 51 m
After mixing 70% by weight of PTT short fiber of m, the resulting web is put on a carding machine, heat-treated at 190 ° C for 1 minute by a continuous heat-treating machine, cooled, and then heat-treated for crystallization at 114 ° C for 20 minutes. And a nonwoven fabric with a basis weight of 50 g / m 2 . Tables 1 and 2 show the physical properties of the obtained heat-adhesive conjugate short fibers and nonwoven fabric.
【００２９】実施例２〜３ 鞘成分を構成するポリマ−のε−ＣＬの共重合量を表１
のようにしてＴｇ、Ｔｃ、Ｔｍを変更した以外は、実施
例１と同様にして熱接着性複合短繊維と不織布を得た。
得られた熱接着性複合短繊維と不織布の諸物性を表１、
表２に示す。Examples 2 to 3 Table 1 shows the copolymerization amount of ε-CL of the polymer constituting the sheath component.
Except for changing Tg, Tc, and Tm as described above, a heat-bondable conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1.
Table 1 shows the physical properties of the obtained heat-adhesive conjugate short fibers and nonwoven fabric.
It is shown in Table 2.
【００３０】比較例１ 熱接着性複合短繊維の芯成分をＰＥＴに変更した以外
は、実施例１と同様にして熱接着性複合短繊維と不織布
を得た。得られた熱接着性複合短繊維と不織布の諸物性
を表１、表２に示す。Comparative Example 1 A heat-adhesive conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that the core component of the heat-adhesive conjugate short fiber was changed to PET. Tables 1 and 2 show the physical properties of the obtained heat-adhesive conjugate short fibers and nonwoven fabric.
【００３１】比較例２ 主体繊維をＰＥＴにした以外は、実施例１と同様にして
不織布を得た。得られた不織布の諸物性を表２に示す。Comparative Example 2 A nonwoven fabric was obtained in the same manner as in Example 1 except that the main fiber was PET. Table 2 shows various physical properties of the obtained nonwoven fabric.
【００３２】比較例３ 鞘成分を構成するポリマーとしてε−ＣＬの共重合量を
表１のように変更して得たＴｇ５３℃、Ｔｃ１２０℃、
Ｔｍ１９５℃の共重合ポリエステルを用い、連続熱処理
機にて２２５℃、１分間の熱処理を行った以外は、実施
例１と同様にして熱接着性複合短繊維と不織布を得た。
得られた熱接着性複合短繊維と不織布の諸物性を表１、
表２に示す。Comparative Example 3 Tg of 53 ° C., Tc of 120 ° C., obtained by changing the copolymerization amount of ε-CL as a polymer constituting the sheath component as shown in Table 1.
A heat-bondable conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that a copolyester having a Tm of 195 ° C was used and heat treatment was performed at 225 ° C for 1 minute using a continuous heat treatment machine.
Table 1 shows the physical properties of the obtained heat-adhesive conjugate short fibers and nonwoven fabric.
It is shown in Table 2.
【００３３】比較例４ 鞘成分を構成するポリマ−として、イソフタル酸を４０
ｍｏｌ％共重合した非晶性ポリエステル（Ｔｇ６２℃、
軟化点温度１１０℃）を用い、連続熱処理機にて１４５
℃、１分間の熱処理を行い、後の結晶化熱処理を行わな
かった以外は、実施例１と同様にして熱接着性複合短繊
維と不織布を得た。得られた熱接着性複合短繊維と不織
布の諸物性を表１、表２に示す。Comparative Example 4 As a polymer constituting a sheath component, isophthalic acid was used in an amount of 40%.
mol% copolymerized amorphous polyester (Tg 62 ° C,
(Softening point temperature 110 ° C) and 145 with a continuous heat treatment machine
A heat-bondable conjugate short fiber and a nonwoven fabric were obtained in the same manner as in Example 1 except that heat treatment was performed at 1 ° C. for 1 minute, and the subsequent crystallization heat treatment was not performed. Tables 1 and 2 show the physical properties of the obtained heat-adhesive conjugate short fibers and nonwoven fabric.
【００３４】[0034]
【表１】 [Table 1]
【００３５】[0035]
【表２】 [Table 2]
【００３６】表２から明らかなように、実施例１〜３で
得られた不織布は、耐熱性、柔軟性ともに優れたもので
あった。As is clear from Table 2, the nonwoven fabrics obtained in Examples 1 to 3 were excellent in both heat resistance and flexibility.
【００３７】一方、比較例１は、熱接着性複合短繊維の
芯成分がＰＥＴであるため、また、比較例２は、不織布
の主体繊維がＰＥＴであるため、いずれも得られた不織
布の耐熱性は良好であったが、柔軟性に劣るものであっ
た。次に、比較例３は、主体繊維、熱接着性複合短繊維
の芯成分ともＰＴＴであるため、得られた不織布の柔軟
性は良好であった。しかし、熱接着性複合短繊維の鞘成
分のＴｍが１８０℃を超えたため、不織布作成の際、加
熱接着により重合体の分解が起こり、得られた不織布の
耐熱性は劣るものであった。さらに、比較例４は、主体
繊維、熱接着性複合短繊維の芯成分ともＰＴＴであるた
め、得られた不織布の柔軟性は良好であった。しかし、
熱接着性複合短繊維の鞘成分のポリマ−が非晶性である
ため、得られた不織布の耐熱性は劣るものであった。On the other hand, in Comparative Example 1, the core component of the heat-adhesive conjugate short fiber was PET, and in Comparative Example 2, the main fiber of the nonwoven fabric was PET. The properties were good, but the flexibility was poor. Next, in Comparative Example 3, since the core components of the main fiber and the heat-adhesive conjugate short fiber were also PTT, the flexibility of the obtained nonwoven fabric was good. However, since the Tm of the sheath component of the heat-adhesive conjugate short fibers exceeded 180 ° C., the polymer was decomposed by heat bonding during the production of the nonwoven fabric, and the heat resistance of the obtained nonwoven fabric was poor. Furthermore, in Comparative Example 4, since the core components of the main fiber and the heat-adhesive conjugate short fiber were both PTT, the flexibility of the obtained nonwoven fabric was good. But,
Since the polymer of the sheath component of the heat-adhesive conjugate short fiber is amorphous, the heat resistance of the obtained nonwoven fabric was inferior.
【００３８】[0038]
【発明の効果】本発明によれば、優れた柔軟性と耐熱性
とを同時に有する不織布を得ることができる熱接着性複
合短繊維と、その不織布が提供される。According to the present invention, a heat-bondable conjugate short fiber capable of obtaining a nonwoven fabric having both excellent flexibility and heat resistance, and the nonwoven fabric are provided.
Claims (2)
たる繰り返し単位とするポリエステル、鞘部がテレフタ
ル酸成分、脂肪族ラクトン成分、エチレングリコ−ル成
分及び１，４−ブタンジオ−ル成分からなり、ガラス転
移点２０〜８０℃、結晶化温度９０〜１３０℃、融点１
３０〜１８０℃である共重合ポリエステルで構成された
芯鞘型複合繊維であって、ヤング率が４４ｃＮ／ｄｔｅ
ｘ以下であることを特徴とするポリエステル系熱接着性
複合短繊維。A core comprising a polyester having trimethylene terephthalate as a main repeating unit, a sheath comprising a terephthalic acid component, an aliphatic lactone component, an ethylene glycol component and a 1,4-butanediol component, and having a glass transition. Point 20-80 ° C, crystallization temperature 90-130 ° C, melting point 1
A core-sheath conjugate fiber composed of a copolyester having a temperature of 30 to 180 ° C. and having a Young's modulus of 44 cN / dte.
x or less, characterized by being not more than x.
複合短繊維を含み、剛軟度が６０ｃＮ以下であることを
特徴とする不織布。2. A non-woven fabric comprising the polyester-based heat-adhesive conjugate short fibers according to claim 1 and having a stiffness of 60 cN or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28682599A JP2001115340A (en) | 1999-10-07 | 1999-10-07 | Polyester hot-melting type conjugated staple fiber and non-woven fabric therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28682599A JP2001115340A (en) | 1999-10-07 | 1999-10-07 | Polyester hot-melting type conjugated staple fiber and non-woven fabric therefrom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001115340A true JP2001115340A (en) | 2001-04-24 |
Family
ID=17709534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28682599A Pending JP2001115340A (en) | 1999-10-07 | 1999-10-07 | Polyester hot-melting type conjugated staple fiber and non-woven fabric therefrom |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001115340A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241653A (en) * | 2005-03-07 | 2006-09-14 | Solotex Corp | Water-absorbing nonwoven fabric structure |
| WO2015049027A1 (en) * | 2013-10-02 | 2015-04-09 | Carl Freudenberg Kg | Fabric sheet with high thermal stability |
-
1999
- 1999-10-07 JP JP28682599A patent/JP2001115340A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241653A (en) * | 2005-03-07 | 2006-09-14 | Solotex Corp | Water-absorbing nonwoven fabric structure |
| WO2015049027A1 (en) * | 2013-10-02 | 2015-04-09 | Carl Freudenberg Kg | Fabric sheet with high thermal stability |
| KR101849372B1 (en) | 2013-10-02 | 2018-04-16 | 칼 프로이덴베르크 카게 | Fabric sheet with high thermal stability |
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