JP3109628B2 - Manufacturing method of composite fiber - Google Patents
Manufacturing method of composite fiberInfo
- Publication number
- JP3109628B2 JP3109628B2 JP28099892A JP28099892A JP3109628B2 JP 3109628 B2 JP3109628 B2 JP 3109628B2 JP 28099892 A JP28099892 A JP 28099892A JP 28099892 A JP28099892 A JP 28099892A JP 3109628 B2 JP3109628 B2 JP 3109628B2
- Authority
- JP
- Japan
- Prior art keywords
- composite
- fiber
- sheath
- heat
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Multicomponent Fibers (AREA)
- Nonwoven Fabrics (AREA)
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 conjugate fiber which is useful for producing a hot roll type nonwoven fabric. 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 Polypropylene or polyester is used as a core component of a heat-adhesive fiber, and a sheath component is made of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, or low-melting polyester. Is known. Such a conventional sheath-core type heat-bondable fiber is usually formed into a web by a carding process or formed into a sheet 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. Nonwoven 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 calender roll are widely used depending on the use of the nonwoven fabric. In recent years, with the increase in demand for nonwoven fabrics, there has been an increasing tendency to employ a hot roll bonding method that is relatively inexpensive and has high productivity not only for wet nonwoven fabrics but also for dry nonwoven 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 conventional non-woven fabric obtained by the hot roll bonding method using the heat-bondable fiber as a material has a drawback that the tensile strength is insufficient or the heat-sealing property is poor. In particular, in the case of using a composite fiber of polyethylene (sheath) / polypropylene (core), which is one of the heat-adhesive composite fibers that are often used in recent years because of their characteristics such as low cost, light weight, and soft texture. It has good heat-sealing properties with other non-woven fabrics and films whose surface is formed of the same material as the sheath component of this fiber. There is a problem that the sealing property is extremely low. Therefore, there has been a strong demand for the appearance of a polypropylene-based heat-adhesive conjugate fiber which is suitable for a hot roll bonding method and has high tensile strength and is useful as a material for a nonwoven fabric having 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 present inventors have conducted intensive studies to achieve the above object, and as a result, propylene
96% by weight (hereinafter simply abbreviated as%), ethylene 2
A composite weight ratio (sheath component) is defined by using a crystalline copolymer composed of 10% and butene-12 to 10% (hereinafter sometimes simply referred to as a terpolymer) as a sheath component and crystalline polypropylene as a core component. (Core component) = 20/80 to 60/40. It was found that the intended purpose was achieved by drawing 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。In the present invention, the terpolymer used for the sheath component of the conjugate fiber is a copolymer obtained by polymerizing propylene, ethylene and butene-1 with the known Ziegler-Natta catalyst to the above-mentioned respective component amounts. It is essentially a random copolymer. If the content of each of the comonomers (ethylene and butene-1) in the copolymer is less than 2%, the resulting fiber will have insufficient heat adhesion. As the content of the comonomer increases, the melting point of the copolymer decreases and the thermal adhesiveness also increases.However, since the surface friction coefficient of the obtained fiber increases and the processability in the card process and the like deteriorates, Those having a content higher than the above upper limit of 10% are not suitable for industrial production. In the present invention, the polypropylene used for the core component of the conjugate fiber is a 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。[0006] The conjugate fiber of the present invention can be produced from the above terpolymer and crystalline polypropylene using a known sheath-core type composite yarn apparatus and drawing apparatus. In order to smoothly carry out this production, the terpolymer has a melt flow rate (A
According to STM D-1238 (L), the MFR may be 3-50, and the crystalline polypropylene preferably has an MFR of 3-50. Further, in the case of a production method in which stretching is not performed such as a spun bond method or a melt blow method, 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 if the sheath component is less than 20%, the thermal adhesiveness of the obtained fiber is reduced. Non-woven fabrics made of styrene cannot obtain sufficient tensile strength and heat sealability, and if the sheath component exceeds 60%, the thermal adhesiveness is sufficient but the thermal shrinkage of the fiber increases, and the dimensional stability is increased. Is reduced. still,
The relationship between the sheath component and the core component may be either concentric or eccentric, but the concentric type is preferred because the web shrinks little during heat treatment.
【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 composite spinning into a sheath-core type is drawn at a draw ratio of less than 3.0, preferably at most 2.5, more preferably at most 2.0. I do. When the draw ratio is 3.0 or more, the molecular orientation of the composite fiber increases, the softening point and the melting point increase, and the thermal adhesiveness decreases. Can not. Further, since the heat shrinkage of the fiber is significantly increased, problems such as a decrease in the dimensional stability of the nonwoven fabric and the occurrence of spots occur. On the other hand, the heat-adhesive conjugate fiber drawn at a low draw ratio of less than 3.0 has a low single yarn strength, but has excellent heat-adhesiveness because the orientation is kept low, and a heat shrinkage. Is low.
【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 a nonwoven fabric obtained by the hot roll bonding method greatly depends on the strength of the single yarn of the heat-bondable fiber when the bonding points of the fibers are sufficiently strong.
On the other hand, when the bonding point is weak, the breaking of the nonwoven fabric is caused by the breaking of the bonding point, so that the tensile strength of the nonwoven fabric is hardly affected by the strength of the single yarn, and its value is very small. Since the conjugate fiber of the present invention suppresses the molecular orientation and improves the thermal adhesiveness, the strength of the single yarn is reduced by lowering the draw ratio, but the bonding point is strong. It can be secured.
Note that the stretching ratio of 1.0 means that stretching is not substantially performed, but this applies to the above-described spun bond method, melt blow method, or a case where only crimping is performed in a normal stretching step. . The heat-adhesive conjugate fiber of the present invention is a ternary copolymer in which the sheath component is mainly composed of propylene and contains an appropriate amount of a comonomer. Therefore, the affinity between the sheath component and the core component is extremely large. Since the peeling at the boundary surface of the sheath and core does not easily occur, not only a high strength, high heat sealing nonwoven fabric can be easily obtained by the hot roll method, but also thermal adhesion to other materials such as rayon and pulp. For example, these are cut into staples having an appropriate fiber length, mixed and formed into a web, and then heat-bonded to obtain a nonwoven fabric having a 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. The conjugate fiber and non-woven fabric obtained in each example
The physical properties of the cloth were evaluated by the following methods. Table 1 shows the results.
It was shown to. Non-woven fabric tensile strength: Use a miniature card machine for sample short fibers
About 20g / m TwoAt 130 ° C
Heated metal roll with a diameter of 165 mm (upper: convex area ratio is 2
Line between 5% embossing roll, bottom: flat roll)
Pressure of 20 kg / cm and a speed of 6 m / min.
Woven. From the obtained nonwoven fabric, the machine flow direction (hereinafter M
D) and a direction perpendicular to it (hereinafter referred to as D).
5cm each for CD)
Create a specimen of width and use a tensile tester to
Measure tensile strength at 10cm, tensile speed 10cm / min
Set. Heat sealability: Not used for measuring the tensile strength of the nonwoven fabric
Cut out a 5 cm wide sample from the woven fabric and use a high-density polyethylene
Len (sheath) / polypropylene (core) (50/50) composite
Approximately 20 g / m2 of fiber (2 d / f)TwoNon-woven
Fabric (A) or polypropylene fiber (2d / f)
Weight 20g / mTwoWidth cut from non-woven fabric (B)
A 5cm test piece and a tip are overlapped by 1cm in length,
3kg / cmTwoThermocompression bonding at 150 ° C. for 3 seconds under pressure
Using a tensile tester as a composite material, gripping distance 10c
m, peel strength is measured at a pulling speed of 10 cm / min.
You. Web heat shrinkage: Short fiber sample was measured using a miniature card machine.
Is about 200g / mTwoHot air circulating dry
Web after heat treatment at 145 ° C for 5 minutes in a dryer
Is measured in the MD direction.
【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 terpolymer having an MFR of 15 consisting of (ethylene: 3%, butene-1: 5% and propylene: 82%) was used, and an MFR of 10 was used as a core component. And a composite ratio of 40/60 (sheath component / core component) at a spinning temperature of 300 ° C. by using a composite spinning apparatus equipped with a nozzle having a diameter of 0.6 mm.
The yarn was spun at a take-up speed of 1000 m / min to obtain a concentric sheath-core composite undrawn yarn having a single yarn fineness of 4.0 d / f. next,
This composite undrawn yarn is drawn 2.4 times at a drawing temperature of 95 ° C.
After applying mechanical crimping and drying at 80 ° C., the fiber was cut into 38 mm to obtain a conjugate 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 1-2 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 was used.
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 composite undrawn yarn having a single yarn fineness of 2.4 d / f. Next, the composite undrawn yarn was drawn at a draw ratio of 1.2.
The film was stretched under the conditions of a draw temperature of 95 ° C., mechanical crimped, dried at 80 ° C., and then cut to 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), composite fiber staples were obtained under the same conditions as in Example 3. Comparative Examples 3 and 4 The single yarn fineness and the draw ratio of the composite undrawn yarn were set to (5.5 d / f:
A composite fiber staple was obtained under the same conditions as in Example 3 except that (3.2 times) and (6.0 d / f: 3.6 times) were used.
【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 3 comprising a sheath component (ethylene: 7%, butene-1: 3% and propylene: 90%) having an MFR of 10
Using a base copolymer, crystalline polypropylene having an MFR of 10 as a core component, a composite ratio of 50/50, a spinning temperature of 300 ° C., and a take-off speed by a composite spinning apparatus equipped with a nozzle having a diameter of 0.6 mm. Spinning was performed at 1000 m / min to obtain a concentric sheath-core 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., and mechanical crimping is performed.
After drying at 80 ° C., it was cut to 38 mm to obtain a conjugate fiber staple. Example 8 A composite was prepared under the same conditions as in Example 7, except that a terpolymer having an MFR of 10 and comprising a sheath component (ethylene: 2%, butene-1: 7% and propylene: 91%) was used. 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 The same conditions as in Example 7 were used except that a ternary copolymer containing 1% each of ethylene and butene-1 and 98% propylene and having an MFR of 15 was used as a 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。The conjugate fiber of the present invention has a good feel (feel), high strength, and heat sealability when it is formed into a web having a desired basis weight using a card machine and then subjected to point bonding with a hot roll. This nonwoven fabric can be used as a surface material of sanitary materials such as sanitary napkins and disposable diapers, or as a medical material such as surgical gowns. Further, the nonwoven fabric obtained by the wet method using the conjugate fiber of the present invention also has high strength and high heat sealability, and thus is widely used not only in the general paper field but also as a tea bag 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
Unstretched composite obtained by spinning a crystalline copolymer consisting of 2 to 10% as a sheath component and a crystalline polypropylene as a core component at a composite ratio (sheath component / core component) of 20/80 to 60/40. A method for producing a conjugate fiber, comprising drawing a 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 JPH06108310A (en) | 1994-04-19 |
JP3109628B2 true JP3109628B2 (en) | 2000-11-20 |
Family
ID=17632844
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JP28099892A Expired - Fee Related JP3109628B2 (en) | 1992-09-25 | 1992-09-25 | Manufacturing method of composite fiber |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0891434B1 (en) * | 1996-12-25 | 2001-05-23 | Chisso Corporation | Heat-fusible composite fiber and non-woven fabric produced from the same |
JP3741180B2 (en) * | 1997-01-20 | 2006-02-01 | チッソ株式会社 | Thermal adhesive composite fiber, nonwoven fabric and absorbent article using the same |
EP1985729B1 (en) | 2006-02-06 | 2013-01-02 | Teijin Fibers Limited | Heat-bondable conjugated fiber and process for production thereof |
JP5784458B2 (en) * | 2011-10-31 | 2015-09-24 | 日東電工株式会社 | Air filter media |
-
1992
- 1992-09-25 JP JP28099892A patent/JP3109628B2/en not_active Expired - Fee Related
Also Published As
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