JPH06108310A - Production of conjugate fiber - Google Patents
Production of conjugate fiberInfo
- Publication number
- JPH06108310A JPH06108310A JP28099892A JP28099892A JPH06108310A JP H06108310 A JPH06108310 A JP H06108310A JP 28099892 A JP28099892 A JP 28099892A JP 28099892 A JP28099892 A JP 28099892A JP H06108310 A JPH06108310 A JP H06108310A
- Authority
- JP
- Japan
- Prior art keywords
- composite
- fiber
- sheath
- component
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Multicomponent Fibers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱ロール方式の不織布
製造用に有用な複合繊維の製造方法に関し、更に詳しく
は、引張強力及びヒートシール性に優れた不織布用素材
として有用なポリプロピレン系熱接着性複合繊維の製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a composite fiber which is useful for producing a non-woven fabric of a heat roll system, and more specifically, a polypropylene-based heat useful as a material for a non-woven fabric having excellent tensile strength and heat sealability. The present invention relates to a method for producing an adhesive conjugate fiber.
【０００２】[0002]
【従来の技術】熱接着性繊維としては、ポリプロピレン
やポリエステルを芯成分とし、高密度ポリエチレン、低
密度のポリエチレン、直鎖状低密度ポリエチレン、エチ
レン酢酸ビニル共重合体、低融点ポリエステル等を鞘成
分としたものが知られている。このような従来の鞘芯型
熱接着性繊維は、通常、カード工程によってウエブとし
たり、抄紙工程によってシート状とした後、鞘成分の融
点以上に加熱し、繊維の接点を融着させることによって
不織布とする。加熱、融着する方法としては、不織布の
用途に応じてサクションバンドドライヤー、サクション
ドラムドライヤー等の熱風接着法や、ヤンキードライヤ
ー、カレンダーロール等の熱ロール接着法が広く利用さ
れている。近年、不織布の需要の増加に伴い、湿式不織
布だけではなく乾式不織布においても比較的コストが安
価で生産性が高い熱ロール接着法を採用しようとする傾
向が強まっている。2. Description of the Related Art As heat-bondable fibers, polypropylene or polyester is used as a core component, and high density polyethylene, low density polyethylene, linear low density polyethylene, ethylene vinyl acetate copolymer, low melting point polyester, etc. are used as sheath components. It is known that Such a conventional sheath-core type heat-adhesive fiber is usually formed into a web by a card process or a sheet form by a papermaking process, and then heated to a temperature equal to or higher than the melting point of the sheath component to fuse the contact points of the fibers. Use non-woven fabric. As a method of heating and fusing, a hot air bonding method such as a suction band dryer and a suction drum dryer, and a hot roll bonding method such as a Yankee dryer and a calendar roll are widely used depending on the use of the non-woven fabric. In recent years, with the increase in demand for non-woven fabrics, there is an increasing tendency to adopt the hot roll bonding method, which is relatively inexpensive and has high productivity, not only for wet non-woven fabrics but also for dry non-woven fabrics.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
熱接着性繊維を材料として熱ロール接着法によって得た
不織布は、引張強力が充分でない、或いはヒートシール
性が乏しいといった欠点があった。ことに、安価・軽量
・ソフトな風合い等の特徴が好まれて近年よく利用され
ている熱接着性複合繊維の１つであるポリエチレン
（鞘）・ポリプロピレン（芯）の複合繊維を材料とした
場合、この繊維の鞘成分と同一の素材で表面が形成され
ている他の不織布やフィルムとのヒートシール性は良好
であるが、ポリプロピレンやその他の異種ポリマーから
成る不織布やフィルムに対しては、ヒートシール性が著
しく低いという問題があった。したがって、熱ロール接
着法に適し、かつ、引張強力が高くヒートシール性に優
れた不織布用材料として有用なポリプロピレン系熱接着
性複合繊維の出現が強く要望されていた。However, the non-woven fabric obtained by the heat roll bonding method using the conventional thermo-adhesive fiber as a material has a defect that the tensile strength is not sufficient or the heat-sealing property is poor. Especially when using polyethylene (sheath) / polypropylene (core) composite fiber, which is one of the heat-adhesive composite fibers that has been widely used in recent years because of its characteristics such as low cost, light weight and soft texture. , It has good heat sealability with other non-woven fabrics and films whose surface is made of the same material as the sheath component of this fiber, but heats non-woven fabrics and films composed of polypropylene and other dissimilar polymers. There is a problem that the sealing property is extremely low. Therefore, there has been a strong demand for the appearance of polypropylene-based thermoadhesive conjugate fibers which are suitable for the heat roll adhesive method and which are useful as a nonwoven fabric material having high tensile strength and excellent heat sealability.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記目的
を達成するために鋭意研究した結果、プロピレン８８〜
９６重量％（以下、単に％と略記する）、エチレン２〜
１０％及びブテン−１２〜１０％から成る結晶性共重合
体（以下単に３元共重合体と略記することがある）を鞘
成分とし、結晶性ポリプロピレンを芯成分として、複合
重量比（鞘成分／芯成分）＝２０／８０〜６０／４０で
紡糸して得た複合未延伸糸を、延伸倍率３.０未満で延
伸することにより所期の目的が達成されることを知り、
本発明を完成するに到った。以下、本発明を更に詳細に
説明する。Means for Solving the Problems The inventors of the present invention have earnestly studied to achieve the above object, and as a result, propylene 88-
96 wt% (hereinafter simply referred to as%), ethylene 2
A crystalline copolymer composed of 10% and butene-12 to 10% (hereinafter sometimes simply referred to as a terpolymer) is used as a sheath component, and crystalline polypropylene is used as a core component. / Core component) = 20/80 to 60/40, and knowing that the intended purpose can be achieved by stretching the composite undrawn yarn obtained by spinning at a draw ratio of less than 3.0,
The present invention has been completed. Hereinafter, the present invention will be described in more detail.
【０００５】本発明において複合繊維の鞘成分に用いる
３元共重合体は、公知のチーグラーナッタ触媒によりプ
ロピレン、エチレン及びブテン−１を上記各成分量とな
るように重合させた共重合体で、本質的にはランダム共
重合体である。該共重合体中のコモノマー（エチレン及
びブテン−１）の含量が各々２％より少ないと、得られ
る繊維は熱接着性において不充分なものとなる。コモノ
マーの含量が増加するに従い共重合体の融点は低下し熱
接着性も増大するが、得られる繊維の表面摩擦係数が高
くなり、カード工程等での加工性が悪化するといった問
題が生じるので、前記上限１０％より多い含量のものは
工業的生産には不適である。本発明において複合繊維の
芯成分にに用いるポリプロピレンは、一般に繊維用に使
用されている結晶性ポリプロピレンである。The ternary copolymer used in the sheath component of the conjugate fiber in the present invention is a copolymer obtained by polymerizing propylene, ethylene and butene-1 by the known Ziegler-Natta catalyst so as to have the above-mentioned respective component amounts. It is essentially a random copolymer. If the content of the comonomer (ethylene and butene-1) in each of the copolymers is less than 2%, the resulting fiber will have insufficient thermal adhesiveness. As the content of the comonomer increases, the melting point of the copolymer decreases and the thermal adhesiveness also increases, but the surface friction coefficient of the obtained fiber becomes high, which causes a problem that the processability in the card process etc. deteriorates. The content higher than the upper limit of 10% is not suitable for industrial production. The polypropylene used as the core component of the composite fiber in the present invention is crystalline polypropylene generally used for fibers.
【０００６】本発明の複合繊維は、上記の３元共重合体
と結晶性ポリプロピレンとを公知の鞘芯型複合糸装置及
び延伸装置を用いて製造することができる。この製造を
円滑に行う上で３元共重合体はメルトフローレート（Ａ
ＳＴＭ Ｄ−１２３８(Ｌ)による、以下ＭＦＲと略記す
ることがある）が３〜５０のもの、結晶性ポリプロピレ
ンはＭＦＲが３〜５０のものが好ましい。また、スパン
ボンド方式やメルトブロー方式のように延伸を行わない
製造方法の場合は、ＭＦＲがこの範囲以上のものであっ
ても差し支えない。鞘成分と芯成分の複合重量比（鞘成
分／芯成分）が２０／８０〜６０／４０に限定される理
由は、鞘成分が２０％未満では得られる繊維の熱接着性
が低下し、これを用いた不織布も充分な引張強度及びヒ
ートシール性を得ることができなくなり、また、鞘成分
が６０％を超すと熱接着性は充分であるが繊維の熱収縮
率が高くなり、寸法安定性が低下するからである。尚、
鞘成分と芯成分の関係は同心型、偏心型のいずれでもよ
いが、熱処理時のウエブの収縮が少ないことから同心型
が好ましい。The conjugate fiber of the present invention can be produced by using the above-mentioned terpolymer and crystalline polypropylene using a known sheath-core type composite yarn device and drawing device. In order to smoothly carry out this production, the terpolymer has a melt flow rate (A
According to STM D-1238 (L), it may be hereinafter abbreviated as MFR) 3 to 50, and crystalline polypropylene preferably has MFR 3 to 50. In the case of a manufacturing method such as a spunbond method or a melt blow method, in which stretching is not performed, the MFR may be more than this range. The reason why the composite weight ratio of the sheath component and the core component (sheath component / core component) is limited to 20/80 to 60/40 is that when the sheath component is less than 20%, the thermal adhesiveness of the obtained fiber is deteriorated. Non-woven fabrics made of sapphire cannot obtain sufficient tensile strength and heat sealability, and if the sheath component exceeds 60%, the thermal adhesion is sufficient but the heat shrinkage rate of the fiber is high, and the dimensional stability is high. Is reduced. still,
The relationship between the sheath component and the core component may be either a concentric type or an eccentric type, but the concentric type is preferable because the shrinkage of the web during heat treatment is small.
【０００７】本発明においては、このように鞘芯型に複
合紡糸して得た複合未延伸糸を延伸倍率３.０未満、好
ましくは２.５以下、よりり好ましくは２.０以下で延伸
する。延伸倍率を３.０以上とすると、複合繊維の分子
配向が高くなり、軟化点及び融点が上昇し熱接着性が低
下するので、熱ロール接着法において十分な引張強度を
有する不織布を得ることができない。また、繊維の熱収
縮率が著しく増加するため、不織布の寸法安定性が低下
したり、目付斑が発生するなどの問題が生じる。これに
対し、３.０未満の低延伸倍率で延伸された熱接着性複
合繊維は、単糸強度は低下するが、配向が低く抑えられ
ているため熱接着性に優れ、かつ、熱収縮率が低いとい
う特徴を有するのである。In the present invention, the composite undrawn yarn obtained by the composite spinning in the sheath-core type is drawn at a draw ratio of less than 3.0, preferably 2.5 or less, more preferably 2.0 or less. To do. When the draw ratio is 3.0 or more, the molecular orientation of the composite fiber becomes high, the softening point and the melting point rise, and the thermal adhesiveness decreases, so that a nonwoven fabric having sufficient tensile strength can be obtained in the hot roll adhesive method. Can not. In addition, since the heat shrinkage rate of the fiber is remarkably increased, problems such as deterioration in dimensional stability of the nonwoven fabric and occurrence of unevenness in the weight are caused. On the other hand, the thermoadhesive conjugate fiber stretched at a low draw ratio of less than 3.0 has a low single yarn strength, but is excellent in heat adhesiveness because the orientation is suppressed to a low level, and has a heat shrinkage ratio. Has a low value.
【０００８】[0008]
【発明の効果】通常、熱ロール接着法によって得られた
不織布の引張強度は、繊維の結合点が十分に強固である
場合には、熱接着性繊維の単糸強度に大きく依存する。
一方、結合点が脆弱な場合には、不織布の破断は結合点
の破壊によって起こるので、不織布の引張強度は、単糸
強度にはほとんど影響されず、しかもその値は非常に小
さい。本発明の複合繊維は分子配向を抑えて熱接着性を
向上させているので、延伸倍率の低下によって単糸強度
は減少するが結合点が強固であるため、十分に満足でき
る不織布の引張強度を確保することができるのである。
尚、延伸倍率が１.０ということは実質的には延伸を行
わないことであるが、前述のスパンボンド方式やメルト
ブロー方式、或いは通常の延伸工程において捲縮付与の
み行う場合等がこれにあてはまる。本発明の熱接着性複
合繊維は、鞘成分がプロピレンを主体とし適度な量のコ
モノマーを含む３元系共重合体であるため、鞘成分と芯
成分の親和性が極めて大きく、鞘芯の境界面での剥離が
起きにくいことから、熱ロール法によって容易に高強
度、高ヒートシール性の不織布を得ることができるのみ
ならず、レーヨン、パルプ等の他素材に対する熱接着性
も有しているので、例えばこれらを適当な繊維長のステ
ープルに切断し、混合してウエブを形成した後、熱接着
することによって、充分な引張強度を有する不織布を得
ることができる。In general, the tensile strength of the nonwoven fabric obtained by the hot roll bonding method largely depends on the single yarn strength of the heat-bondable fiber when the fiber bonding point is sufficiently strong.
On the other hand, when the bonding point is fragile, the breaking of the non-woven fabric is caused by the breaking of the bonding point, so that the tensile strength of the non-woven fabric is hardly affected by the single yarn strength, and its value is very small. Since the composite fiber of the present invention suppresses the molecular orientation and improves the thermal adhesiveness, the single yarn strength is reduced by the reduction of the draw ratio, but the binding point is strong, so that the tensile strength of the nonwoven fabric can be sufficiently satisfied. It can be secured.
It should be noted that the stretching ratio of 1.0 means that the stretching is not substantially performed, but the above-described spunbond method, melt blow method, or the case where only crimping is performed in the normal stretching step is applicable to this. . Since the sheath component of the heat-adhesive conjugate fiber of the present invention is a terpolymer mainly containing propylene and containing an appropriate amount of comonomer, the affinity between the sheath component and the core component is extremely large. Since the peeling at the boundary surface of the sheath core does not easily occur, not only a high-strength, high-heat-sealing non-woven fabric can be easily obtained by the heat roll method, but also thermal adhesion to other materials such as rayon and pulp. Since these also have staples, for example, they can be cut into staples having an appropriate fiber length, mixed to form a web, and then heat-bonded to obtain a nonwoven fabric having sufficient tensile strength.
【０００９】[0009]
【実施例】本発明を実施例及び比較例を用いて具体的に
説明する。尚、各例において得られた複合繊維及び不織
布の物性評価は以下の方法によった。その結果を第１表
に示した。 不織布引張強度：試料短繊維をミニチュアカード機を用
い目付け約２０ｇ／ｍ 2のウェッブとし、１３０℃に加
熱した直径１６５mmの金属ロール（上：凸部面積率が２
５％のエンボスロール，下：フラットロール）の間に線
圧２０ｋｇ／ｃｍ、速度６ｍ／ｍｉｎの条件で通して不
織布化する。得られた不織布から機械流れ方向（以下Ｍ
Ｄと略記することがある）と、それと垂直な方向（以下
ＣＤと略記することがある）についてそれぞれ５ｃｍの
幅の試料片を作成し、引張り試験機を用い、つかみ間隔
１０ｃｍ、引張り速度１０ｃｍ／ｍｉｎで引張強度を測
定する。 ヒートシール性：上記不織布引張強度の測定に用いる不
織布から幅５ｃｍの試料片を切り出し、高密度ポリエチ
レン（鞘）／ポリプロピレン（芯）（５０／５０）複合
繊維（２ｄ／ｆ）から成る目付け約２０ｇ／ｍ2の不織
布(Ａ) 或いはポリプロピレン繊維（２ｄ／ｆ）から成
る目付け約２０ｇ／ｍ2の不織布(Ｂ)から切り出した幅
５ｃｍの試験片と先端部分を長さ１ｃｍだけ重ね合せ、
３ｋｇ／ｃｍ2の加圧下３秒間１５０℃で熱圧着させた
複合材料とし、引張り試験機を用い、つかみ間隔１０ｃ
ｍ、引張り速度１０ｃｍ／ｍｉｎで剥離強力を測定す
る。 ウエブ熱収縮率：試料短繊維をミニチュアカード機によ
って目付約２００ｇ／ｍ2のウエブとし、熱風循環式乾
燥器で１４５℃、５分間の熱処理を施した場合のウエブ
のＭＤ方向における収縮率を測定する。EXAMPLES The present invention will be described in detail with reference to Examples and Comparative Examples.
explain. In addition, the composite fiber and non-woven fabric obtained in each example
The physical properties of the cloth were evaluated by the following methods. The results are shown in Table 1.
It was shown to. Non-woven fabric tensile strength: Use sample short fibers with a miniature card machine
Approximately 20 g / m 2As a web and heated to 130 ° C
Heated metal roll with a diameter of 165 mm (upper: convex area ratio is 2
5% embossing roll, bottom: flat roll)
Do not pass it under the conditions of pressure of 20 kg / cm and speed of 6 m / min.
Weaving. Machine flow direction (hereinafter M
Abbreviated as D) and the direction perpendicular to it (hereinafter
5 cm each)
Create a width sample and use the tensile tester
Tensile strength is measured at 10 cm and pulling speed of 10 cm / min.
Set. Heat sealability: Not used for measuring the tensile strength of the above nonwoven fabric
A sample piece with a width of 5 cm is cut out from the woven cloth and used for high density polyethylene.
Len (sheath) / polypropylene (core) (50/50) composite
Fabric weight of fiber (2d / f): about 20g / m2Non-woven
Made of cloth (A) or polypropylene fiber (2d / f)
20g / m2Width cut from the non-woven fabric (B)
Overlap the 5 cm test piece and the tip by 1 cm in length,
3 kg / cm2Was thermocompression bonded at 150 ° C for 3 seconds under pressure
As a composite material, using a tensile tester, gripping distance 10c
m, the peeling strength is measured at a pulling speed of 10 cm / min.
It Web heat shrinkage: Sample short fibers were placed on a miniature card machine.
It is about 200g / m2As a web of hot air circulation type dry
Web after heat treatment at 145 ° C for 5 minutes in a dryer
The shrinkage ratio in the MD direction of is measured.
【００１０】実施例１ 鞘成分として、（エチレン：３％、ブテン−１：５％及
びプロピレン：８２％）からなり、ＭＦＲが１５である
３元共重合体を用い、芯成分としてＭＦＲが１０である
結晶性ポリプロピレン（ホモポリマー）を用いて、直径
０．６ｍｍのノズルを備えた複合紡糸装置により、複合
比４０／６０（鞘成分／芯成分）、紡糸温度３００℃，
引取り速度１０００ｍ／ｍｉｎで紡糸して、単糸繊度が
４．０ｄ／ｆの同心鞘芯型複合未延伸糸を得た。次に、
この複合未延伸糸を延伸倍率２．４倍、延伸温度９５℃
の条件で延伸を行い、機械捲縮を付与し、８０℃で乾燥
させた後、３８ｍｍに切断して複合繊維ステープルを得
た。 実施例２ 鞘成分と芯成分の複合比を６０／４０とした以外は実施
例１と同様の条件で複合繊維ステープルを得た。Example 1 As a sheath component, a ternary copolymer consisting of (ethylene: 3%, butene-1: 5% and propylene: 82%) and having an MFR of 15 was used, and an MFR of 10 was used as a core component. Using a crystalline polypropylene (homopolymer) which is a composite spinning apparatus equipped with a nozzle having a diameter of 0.6 mm, a composite ratio of 40/60 (sheath component / core component), a spinning temperature of 300 ° C.,
Spinning was performed at a take-up speed of 1000 m / min to obtain a concentric sheath-core type composite undrawn yarn having a single yarn fineness of 4.0 d / f. next,
This composite undrawn yarn has a draw ratio of 2.4 and a draw temperature of 95 ° C.
The film was stretched under the conditions described above, mechanical crimped, dried at 80 ° C., and then cut into 38 mm to obtain a composite fiber staple. Example 2 A composite fiber staple was obtained under the same conditions as in Example 1 except that the composite ratio of the sheath component and the core component was 60/40.
【００１１】比較例１〜２ 鞘成分と芯成分の複合比を７０／３０及び１０／９０に
代えた以外は、各々実施例１と同様の条件で複合繊維ス
テープルを得た。 実施例３ 実施例１と同一の原料樹脂を用い、複合比５０／５０、
紡糸温度３００℃，引取速度１０００ｍ／ｍｉｎで紡糸
して、単糸繊度が２．４ｄ／ｆの同芯鞘芯型複合未延伸
糸を得た。次に、この複合未延伸糸を延伸倍率１．２
倍，延伸温度９５℃の条件で延伸を行い、機械捲縮を付
与し、８０℃で乾燥させた後、３８ｍｍに切断して複合
繊維ステープルを得た。 実施例４〜６ 複合未延伸糸の単糸繊度と延伸倍率を（３．５ｄ／ｆ：
１．８倍）、（４．０ｄ／ｆ：２．４倍）及び（５．０
ｄ／ｆ：２．８倍）に代えた以外は、各々実施例３と同
様の条件で複合繊維ステープルを得た。 比較例３〜４ 複合未延伸糸の単糸繊度と延伸倍率を（５．５ｄ／ｆ：
３．２倍）、（６．０ｄ／ｆ：３．６倍）に代えた以外
は、実施例３と同様の条件で複合繊維ステープルを得
た。Comparative Examples 1 and 2 Composite fiber staples were obtained under the same conditions as in Example 1 except that the composite ratio of the sheath component and the core component was changed to 70/30 and 10/90. Example 3 Using the same raw material resin as in Example 1, a composite ratio of 50/50,
Spinning was performed at a spinning temperature of 300 ° C. and a take-up speed of 1000 m / min to obtain a concentric-sheath core-type composite undrawn yarn having a single yarn fineness of 2.4 d / f. Next, this composite undrawn yarn is drawn at a draw ratio of 1.2.
Double stretching was performed under the conditions of a stretching temperature of 95 ° C., mechanical crimping was applied, dried at 80 ° C., and then cut into 38 mm to obtain a composite fiber staple. Examples 4 to 6 The single yarn fineness and the draw ratio of the composite undrawn yarn were set to (3.5 d / f:
1.8 times), (4.0 d / f: 2.4 times) and (5.0 times)
d / f: 2.8 times), and a composite fiber staple was obtained under the same conditions as in Example 3, except that the above was changed. Comparative Examples 3 to 4 The single yarn fineness and the draw ratio of the composite undrawn yarn were set to (5.5 d / f:
3.2 times), (6.0 d / f: 3.6 times), except that the composite fiber staple was obtained under the same conditions as in Example 3.
【００１２】実施例７ 鞘成分として、（エチレン：７％、ブテン−１：３％及
びプロピレン：９０％）からなりＭＦＲが１０である３
元系共重合体を用い、芯成分としてＭＦＲが１０である
結晶性ポリプロピレンを用いて、口径０．６ｍｍのノズ
ルを備えた複合紡糸装置により、複合比５０／５０、紡
糸温度３００℃、引取速度１０００ｍ／ｍｉｎで紡糸し
て単糸繊度が３．５ｄ／ｆの同心鞘芯型複合未延伸糸を
得た。次に、この複合未延伸糸を延伸倍率１．８倍、延
伸温度９５℃の条件で延伸を行い、機械捲縮を付与し、
８０℃で乾燥させた後、３８ｍｍに切断して複合繊維ス
テープルを得た。 実施例８ 鞘成分に（エチレン：２％、ブテン−１：７％及びプロ
ピレン：９１％）からなりＭＦＲが１０の３元共重合体
を用いた以外は、実施例７と同様の条件で複合繊維ステ
ープルを得た。Example 7 (Ethylene: 7%, Butene-1: 3% and Propylene: 90%) as a sheath component and MFR of 10 3
Using the original copolymer, crystalline polypropylene having MFR of 10 as the core component, and a composite spinning apparatus equipped with a nozzle having a diameter of 0.6 mm, a composite ratio of 50/50, a spinning temperature of 300 ° C., a take-up speed. Spinning was performed at 1000 m / min to obtain a concentric sheath-core type composite undrawn yarn having a single yarn fineness of 3.5 d / f. Next, this composite undrawn yarn is drawn under the conditions of a draw ratio of 1.8 times and a drawing temperature of 95 ° C. to impart a mechanical crimp,
After drying at 80 ° C., it was cut into 38 mm to obtain a composite fiber staple. Example 8 Composite under the same conditions as in Example 7 except that a ternary copolymer having an MFR of 10 and composed of (ethylene: 2%, butene-1: 7% and propylene: 91%) was used as a sheath component. Fiber staples were obtained.
【００１３】比較例５ 鞘成分にエチレン及びブテン−１が各々１％、プロピレ
ンが９８％でありＭＦＲが１５である３元系共重合体を
用いた以外は、実施例７と同様の条件で複合繊維ステー
プルを得た。Comparative Example 5 Under the same conditions as in Example 7, except that a ternary copolymer having ethylene and butene-1 of 1%, propylene of 98% and MFR of 15 was used as the sheath component. A composite fiber staple was obtained.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【発明の効果】本発明の複合繊維は、カード機を用いて
所望の目付けのウェッブとした後、熱ロールによりポイ
ントボンド加工すると、触感（風合い）がよく、高強度
で、かつ、ヒートシール性に優れた不織布が得られ、こ
の不織布は例えば生理用ナプキンや紙オムツ等の衛生材
料の表面材、或いは手術衣等の医療用として利用するこ
とができる。また、本発明の複合繊維を用い、湿式法に
よって得られた不織布も高強度、高ヒートシール性を有
するので、一般の紙分野のみならず、ティーバッグやそ
の他の包装材として広く利用される。EFFECTS OF THE INVENTION The conjugate fiber of the present invention has a good feel (feel), high strength, and heat sealability when it is point-bonded with a heat roll after forming a web having a desired areal weight using a card machine. An excellent non-woven fabric is obtained, and the non-woven fabric can be used as a surface material for sanitary materials such as sanitary napkins and paper diapers, or for medical use such as surgical gowns. Further, since the nonwoven fabric obtained by the wet method using the conjugate fiber of the present invention has high strength and high heat sealability, it is widely used not only in the general paper field but also as tea bags and other packaging materials.
Claims (1)
に％と略記する）、エチレン２〜１０％及びブテン−１
２〜１０％から成る結晶性共重合体を鞘成分とし、結晶
性ポリプロピレンを芯成分として、複合比（鞘成分／芯
成分）＝２０／８０〜６０／４０で紡糸して得た複合未
延伸糸を、延伸倍率３.０未満で延伸することを特徴と
する複合繊維の製造方法。1. 88 to 96% by weight of propylene (hereinafter simply referred to as "%"), 2 to 10% of ethylene and butene-1
A composite unstretched product obtained by spinning at a composite ratio (sheath component / core component) = 20/80 to 60/40 using a crystalline copolymer composed of 2 to 10% as a sheath component and crystalline polypropylene as a core component. A method for producing a conjugate fiber, which comprises drawing the yarn at a draw ratio of less than 3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28099892A JP3109628B2 (en) | 1992-09-25 | 1992-09-25 | Manufacturing method of composite fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28099892A JP3109628B2 (en) | 1992-09-25 | 1992-09-25 | Manufacturing method of composite fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06108310A true JPH06108310A (en) | 1994-04-19 |
| JP3109628B2 JP3109628B2 (en) | 2000-11-20 |
Family
ID=17632844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28099892A Expired - Fee Related JP3109628B2 (en) | 1992-09-25 | 1992-09-25 | Manufacturing method of composite fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3109628B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998029586A1 (en) * | 1996-12-25 | 1998-07-09 | Chisso Corporation | Heat-fusible composite fiber and non-woven fabric produced from the same |
| EP0854213A1 (en) * | 1997-01-20 | 1998-07-22 | Chisso Corporation | Heat-fusible composite fiber, and non-woven fabrics and absorbent products produced from the same |
| WO2007091662A1 (en) | 2006-02-06 | 2007-08-16 | Teijin Fibers Limited | Heat-bondable conjugated fiber and process for production thereof |
| JP2013094717A (en) * | 2011-10-31 | 2013-05-20 | Nitto Denko Corp | Air filter medium |
-
1992
- 1992-09-25 JP JP28099892A patent/JP3109628B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998029586A1 (en) * | 1996-12-25 | 1998-07-09 | Chisso Corporation | Heat-fusible composite fiber and non-woven fabric produced from the same |
| US6156679A (en) * | 1996-12-25 | 2000-12-05 | Chisso Corporation | Heat-fusible composite fiber and non-woven fabric produced from the same |
| EP0854213A1 (en) * | 1997-01-20 | 1998-07-22 | Chisso Corporation | Heat-fusible composite fiber, and non-woven fabrics and absorbent products produced from the same |
| WO2007091662A1 (en) | 2006-02-06 | 2007-08-16 | Teijin Fibers Limited | Heat-bondable conjugated fiber and process for production thereof |
| US7674524B2 (en) | 2006-02-06 | 2010-03-09 | Teijin Fibers Limited | Thermoadhesive conjugate fiber and manufacturing method of the same |
| JP2013094717A (en) * | 2011-10-31 | 2013-05-20 | Nitto Denko Corp | Air filter medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3109628B2 (en) | 2000-11-20 |
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