JPH0749619B2

JPH0749619B2 - Entangled nonwoven fabric and method for producing the same

Info

Publication number: JPH0749619B2
Application number: JP2098275A
Authority: JP
Inventors: 孝一長岡; 文夫松岡; 敏 ▲かせ▼谷; 芳基宮原
Original assignee: Unitika Ltd
Current assignee: Unitika Ltd
Priority date: 1990-04-12
Filing date: 1990-04-12
Publication date: 1995-05-31
Anticipated expiration: 2010-05-31
Also published as: JPH03294558A

Description

Detailed Description of the Invention [Industrial applications]

本発明は、二種類の繊維形成性重合体から構成される連
続繊維を巧みに組み合わせて成る、寸法安定性に優れ且
つ柔軟性に富む、交絡不織布及びその製造方法に関する
ものである。TECHNICAL FIELD The present invention relates to an entangled nonwoven fabric excellent in dimensional stability and rich in flexibility, which is formed by skillfully combining continuous fibers composed of two kinds of fiber-forming polymers, and a production method thereof.

【従来の技術及び発明が解決しようとする課題】従来より、極細繊維より成る不織布の製造方法として、
分割型二成分複合繊維を用いる方法が採用されている。
即ち、この複合繊維を用いてウェッブを形成し、このウ
ェッブにニードルパンチ又は高圧液体柱状流を作用させ
て、複合繊維に衝撃を与え、複合繊維を割繊して極細繊
維を形成せしめると共に、この極細繊維同士を交絡させ
て不織布を得る方法が採用されている。しかしながら、ニードルパンチを作用させる方法は、厚
手のウェッブ即ち目付400〜800g/m²程度のウェッブの場
合しか有効でないということがあった。これは、単位面
積当りの繊維量が少ないと、ニードルパンチ用針によっ
て十分な交絡を付与しえないからでえる。従って、ニー
ドルパンチによる方法で得られた不織布は厚手であっ
て、柔軟性に乏しいという欠点があった。これに対し、高圧液体柱状流を作用させる方法は、比較
的薄手のウェッブの場合でも有効である。しかしなが
ら，、高圧液体柱状流を作用させて得られた不織布は、
縦方向（機械方向）と横方向（幅方向）との強伸度差が
大きいという欠点があった。即ち、縦方向は引張強力が
高く横方向は引張強力が極めて低くなっており、引張強
力の差が大きく、そしてこれに伴い伸度差も大きいとい
う欠点があった。これは、機械方向に走行するウェッブ
に連続的に高圧液体柱状流を作用させるため、自由度の
大きい（どの方向にも自由に運動しうる）繊維は、主と
して機械方向に交絡されるためであると考えられる。そこで、本発明は、高圧液体柱状流を作用させる前段階
で、ウェッブに特殊な処理を施し、ウェッブ中の繊維の
自由度を減少させ、繊維が機械方向にのみ交絡せず、幅
方向にも交絡するようにして、縦方向と横方向の強伸度
差を少なくした、柔軟な交絡不織布を提供しようという
ものである。なお、特公平1-47585号公報には、海島型複合繊維より
なるウェッブに高圧液体柱状流を作用させて、海成分を
破砕して島成分で構成される極細繊維よりなる不織布が
記載されている。しかしながら、この不織布は前記の場
合と同様に、縦方向と横方向の強伸度差が大きいという
欠点がある。また、海成分は、破砕されるのみで不織布
の構成繊維とならないものであるから、不経済である
し、更に不織布中に破砕された海成分が残って、発塵の
原因になるという欠点がある。2. Description of the Related Art Conventionally, as a method for producing a nonwoven fabric made of ultrafine fibers,
A method using split type bicomponent composite fibers has been adopted.
That is, a web is formed using this composite fiber, a needle punch or a high-pressure liquid columnar flow is applied to this web, and the composite fiber is impacted to split the composite fiber to form an ultrafine fiber. A method of obtaining non-woven fabric by intertwining ultrafine fibers is adopted. However, the method of operating the needle punch is sometimes effective only for a thick web, that is, a web having a basis weight of about 400 to 800 g / m ² . This is because if the amount of fibers per unit area is small, sufficient entanglement cannot be imparted by the needle punch needle. Therefore, the nonwoven fabric obtained by the needle punching method has a drawback that it is thick and poor in flexibility. On the other hand, the method of applying the high-pressure liquid columnar flow is effective even in the case of a relatively thin web. However, the non-woven fabric obtained by applying the high-pressure liquid columnar flow is
There is a drawback that there is a large difference in strength and elongation between the longitudinal direction (machine direction) and the lateral direction (width direction). That is, the tensile strength is high in the longitudinal direction and the tensile strength is extremely low in the lateral direction, and there is a drawback that the difference in tensile strength is large and the difference in elongation is large accordingly. This is because the high-pressure liquid columnar flow is continuously applied to the web traveling in the machine direction, and thus the fibers having a large degree of freedom (which can move freely in any direction) are mainly entangled in the machine direction. it is conceivable that. Therefore, in the present invention, before the high-pressure liquid columnar flow is applied, the web is subjected to a special treatment to reduce the degree of freedom of the fibers in the web, and the fibers are not entangled only in the machine direction, and also in the width direction. The purpose of the present invention is to provide a flexible entangled non-woven fabric in which the difference in strength and elongation between the machine direction and the transverse direction is reduced by interlacing. In addition, Japanese Patent Publication No. 1-47585 discloses a non-woven fabric composed of ultrafine fibers composed of island components by crushing sea components by causing a high-pressure liquid columnar flow to act on a web composed of sea-island type composite fibers. There is. However, this non-woven fabric has a drawback that the difference in strength and elongation between the longitudinal direction and the transverse direction is large, as in the case described above. Further, the sea component is uneconomical because it is only crushed and does not form the constituent fibers of the non-woven fabric, and further, the crushed sea component remains in the non-woven fabric, which causes dust generation. is there.

[Means and Actions for Solving the Problems]

本発明は、繊維形成性低融点重合体と該低融点重合体に
対し非相溶性でかつ該低融点重合体の融点より30〜180
℃高い融点を有する繊維形成性高融点重合体とから成る
単糸繊度が１〜12デニールの分割型二成分複合連続単糸
群と、該複合連続単糸の分割により発現した該低融点重
合体又は該高融点重合体から構成される単糸繊度が0.05
〜0.8デニールの割繊フィラメント群とから成る不織布
であって、該不織布は、該複合連続単糸群が三次元的交
絡をしておらずかつ該低融点重合体により少なくとも部
分的に熱圧着されている部位と、該割繊フィラメント群
同士又は該割繊フィラメント群と該複合連続単糸群とが
三次元的交絡をしている部位とを有し、かつ該不織布の
縦方向と横方向の引張強力の比は0.3〜3.0:1であり、し
かも両方向の破断伸度が共に100％以下であることを特
徴とする交絡不織布に関するものである。本発明に係る交絡不織布は、分割型二成分複合連続単糸
群と、この複合連続単糸の分割により発現した割繊フィ
ラメント群とよりなっている。分割型二成分複合連続単糸は、繊維形成性低融点重合体
と繊維形成性高融点重合体とから形成されている。そし
て、両重合体は共に単糸の表面に露出しており、かつ単
糸の断面内において一方の重合体が他の重合体により分
割割繊可能な形に仕切られている。複合連続単糸の断面
の具体例としては、第１〜４図に示す如きものである
が、これらに限られず従来公知の各種のものが用いられ
る。このような分割型二成分複合連続単糸は、両重合体
を用いて、従来公知の溶融複合紡糸法に基づき製造する
ことができる。低融点重合体と高融点重合体とは、互いに非相溶性であ
る。両重合体が相溶性であると、第１〜４図に示す如
く、断面において両重合体が確実に劃され、後の工程で
割繊しうるような連続複合単糸を得ることができないの
で、好ましくない。また、低融点重合体と高融点重合体の融点差は30〜180
℃である。本発明において、重合体に融点がない場合に
は、その軟化点を融点と称する。両重合体の融点差が30
℃未満であると、ウェッブを形成した後のポイント熱圧
着工程において低融点重合体を融着処理する際、高融点
重合体が悪影響を受けやすく、ウェッブが収縮を起こし
やすくなって寸法安定性が不良になったり、或いは熱圧
着時の接着温度域が狭くなって温度制御が困難になるの
で、好ましくない。また、両重合体の融点差が180℃を
超えると、両重合体を溶融複合紡糸する際に低融点重合
体が熱劣化を起こしやすく、現実的に複合連続単糸を製
造しにくくなるため、好ましくない。本発明において、
特に好ましい両重合体の融点差は、35〜165℃である。分割型二成分複合連続単糸の単糸繊度は、１〜12デニー
ルである。単糸繊度が１デニール未満になると、溶融防
糸する際の紡糸口金の単孔当りの吐出量が低下し、生産
性が低下するので好ましくない。また、生産性を向上さ
せようとして、紡糸口金の孔数を増加させると、紡糸工
程が不安定になるので好ましくない。単糸繊維が12デニ
ールを超えると、溶融紡糸された糸条の冷却やエアーサ
ッカーによる引き取りが困難になるので、好ましくな
い。また、糸条の冷却を促進させるため、紡糸口金の孔
数を減らすと、生産性が低下するので好ましくない。この分割型二成分複合連続単糸は、後の工程で高圧液体
柱状流を衝突させると、低融点重合体と高融点重合体と
の境界で分割され、低融点重合体からなる割繊フィラメ
ント及び高融点重合体からなる割繊フィラメントが発現
する。本発明において、この割繊フィラメントの単糸繊
度は、0.05〜0.8デニールである。割繊フィラメントの
単糸繊度を0.05デニール未満にしようとすると、元の分
割型二成分複合連続単糸の単糸繊度を細くするか、又は
分割数を極めて多数にする必要がある。しかし、前者の
場合には複合連続単糸の生産性が低下するので、好まし
くない。また、後者の場合には、紡糸口金の吐出孔の構
造が複雑になって、紡糸口金が高価になり、かつ一定の
紡糸口金の面積内での吐出孔数が減少し、総吐出量が低
下して生産性の低下を来すので、好ましくない。更に、
分割数が多いと、割繊フィラメントを発現させるための
分割割繊が困難になるので、好ましくない。逆に、割繊
フィラメントの単糸繊度が0.8デニールを超えると、得
られる交絡不織布の風合が低下し、また柔軟性も損なわ
れ、極めて繊細な表面タッチが得られないので、好まし
くない。本発明において、分割型二成分複合連続単糸を構成する
低融点重合体と高融点重合体との組み合わせとしては、
ポリオレフィン／ポリアミド，ポリオレフィン／ポリエ
ステル，ポリアミド／ポリエステル，等が挙げられる
が、これらは代表例であって他の各種の組み合わせも任
意に採用される。本発明に使用し得る繊維形成性ポリオレフィン系重合体
の例としては、炭素原子の数が２〜18の脂肪族α−モノ
オレフィン、例えばエチレン，プロピレン，ブテン−1,
ペンテン−1,3−メチルブテン−1,ヘキセン−1,オクテ
ン−1,ドデセン−1,オクタデセン−１のホモポリオレフ
ィン又は共重合ポリオレフィンがある。脂肪族α−モノ
オレフィンは他のオレフィン及び／又は少量（重合体重
量の約10重量％まで）の他のエチレン系不飽和モノマ
ー、例えばブタジエン，イソプレン，ペンタジエン−１
・3,スチレン，α−メチルスチレンの如き類似のエチレ
ン系不飽和モノマーと共重合されていても良い。特にポ
リエチレンの場合、重合体重量の約10重量％までのプロ
ピレン，ブテン−1,ヘキセン−1,オクテン−１又は類似
の高級α−オレフィンと共重合させたものが好ましい。本発明に使用し得る繊維形成性ポリアミド系重合体の例
としては、ナイロン4,ナイロン46,ナイロン6,ナイロン6
6,ナイロン610,ナイロン11,ナイロン12やポリメタキシ
レンアジパミド（MXD−６），ポリパラキシリレンデカ
ンアミド（PXD-12），ポリビスシクロヘキシルメタンデ
カンアミド（PCM-12）又はこれらのモノマーを構成単位
とする共重合ポリアミドがある。本発明に使用し得る繊維形成性ポリエステル系重合体の
例としては、酸成分としてテレフタル酸，イソフタル
酸，フタル酸，ナフタリン−２・６−ジカルボン酸等の
芳香族ジカルボン酸若しくはアジピン酸，セバシン酸な
どの脂肪族ジカルボン酸又はこれらのエステル類と、ア
ルコール成分としてエチレングリコール，ジエチレング
リコール,1・４−ブタンジオール，ネオペンチルグリコ
ール，シクロヘキサン−１・４−ジメタノール等のジオ
ール化合物とから合成されるホモポリエステル乃至は共
重合ポリエステルであり、上記ポリエステルにパラオキ
シ安息香酸,5−ソジュームスルフォイソフタール酸，ポ
リアルキレングリコール，ペンタエリスリトール，ビス
フェノールＡ等が添加或いは共重合されていてもよい。その他の繊維形成性重合体の例としては、例えばビニル
系重合体が用いられ、具体的にはポリビニルアルコー
ル，ポリ酢酸ビニル，ポリアクリル酸エステル，エチレ
ン酢酸ビニル共重合体，ポリ塩化ビニル，ポリ塩化ビニ
リデン、又はこれらの共重合体が用いられる。また、ポ
リフェニレン系重合体又はその共重合体を使用すること
もできる。なお、繊維形成性低融点重合体及び高融点重合体には、
本発明の目的を阻害しない範囲で、艶消し剤，顔料，防
炎剤，消臭剤，帯電防止剤，酸化防止剤，紫外線吸収剤
等の任意の添加剤が添加されていてもよい。本発明における分割型二成分複合連続単糸は、従来公知
の溶融複合紡糸法で紡糸され、横吹付や環状吹付等従来
公知の冷却装置を用いて、吹付風により冷却された後、
一般的にエアーサッカーを用いて，目的繊度となるよう
に牽引細化されて引き取られる。牽引速度は2000m/分以
上、特に3000m/分程度以上が好適である。エアーサッカーから排出される複合連続単糸群は、一般
的には、高圧電場中のコロナ放電域か、又は摩擦衝突帯
域を通過せしめて帯電開繊させた後、スクリーンから成
るコンベアーの如き移動堆積装置上に開繊堆積させてウ
ェッブが形成される。ウェッブの目付は10〜150g/m^m程
度が好適である。ウェッブの目付が40g/m^m程度以下であ
ると、後の高圧液体柱状流の作用によって、実質上ウェ
ッブの全厚みを通じて複合連続単糸の分割割繊を進める
ことが容易である。50g/m²程度以上となると、ウェッブ
の厚みの中心部に未割繊モノフィラメント即ち複合連続
単糸が残存する。本発明に係る交絡不織布には、ウェッ
ブの厚みの中心部に複合連続単糸が残存するタイプの不
織布も包含されている。このようにして得られたウェッブは、ポイント熱圧着装
置を用いて、分割型二成分複合連続単糸群が部分的に熱
圧着される如く処理される。この熱圧着処理の前に、移
動堆積装置上に担持されたウェッブが移送に十分に耐え
るように、移動堆積装置上において仮圧ロールで圧着し
て、ウェッブ強度を高めてもよい。熱圧着を効果的に高
速で実施するためには、先に説明した両重合体の融点差
が30℃以上であることが不可欠である。この部分的な熱
圧着は、通常の熱エンボスロールや、最近実用化されだ
した超音波溶着装置を用いて実施することができる。ポ
イント熱圧着における圧着部の形状は、丸形，だ円形，
菱形，三角形,T形，井形等の任意形状で良い。また、圧
着面積率を５〜50％とするのが好ましい。即ち、熱圧着
された部位：熱圧着されていない部位＝1:1〜19とする
のが、好ましい。圧着面積率が50％を超えると、得られ
た不織布が剛直化し、柔軟性が低下する傾向となる。ま
た、圧着面積率が５％未満になると、分割型二成分複合
連続単糸を構成する低融点重合体による部分的な熱圧着
部位が不足して、本発明の目的とする引張強力のバラン
スや低伸度性等の良好な寸法安定性が得られにくい傾向
が生じる。本発明において、ウェッブは、100g/m²の目付のウェッ
ブに換算した場合の5cm幅当たりの引張強力の縦・横合
計値が20kg以上となる如く、部分的に熱圧着処理される
ことが好ましい。なお、かかる部分的に熱圧着処理され
たウェッブは、次の高圧液体柱状流を作用させる以前の
段階で、目付（g/m²）当たり50kg/5cm幅の荷重下で、一
般的に10％以下、特に５％以下の伸度を示すものであ
る。このような部分的な熱圧着を行ったウェッブに、高圧液
体柱状流を作用させて、複合連続単糸の分割割繊、及び
割繊フィラメント群同士又は割繊フィラメント群と複合
連続単糸群の交絡を施す。これによって、部分的な熱圧
着部位が残存しつつ、熱圧着されていない部位で割繊フ
ィラメント群同士等が三次元的に交絡し、本発明が目的
とする、縦・横の引張強力のバランスに優れ、また縦・
横の破断伸度が共に100％以下である寸法安定性に優れ
た不織布が得られるのである。なお、分割型二成分複合
連続単糸群の部分的な熱圧着処理は、交絡処理即ち高圧
液体柱状流を作用させる前に施されるものであるから、
得られる交絡不織布に残存する部分的な熱圧着部位に
は、三次元的交絡が生じていないことは言うまでもな
い。本発明において重要なことは、ウェッブに部分的な熱圧
着を施した後に、高圧液体柱状流を作用させて交絡処理
を行う点にある。即ち、ウェッブ中の複合連続単糸が熱
圧着部位で固着されることにより、高圧液体柱状流を作
用させても、複合連続単糸群や割繊フィラメント群は自
由に運動することができず、一定の規制範囲でしか運動
できない点にある。この運動が制限されることにより、
機械方向（縦方向）にも幅方向（横方向）にも、比較的
均一に交絡が施されるのである。これが例えば、熱圧着
部位が存在しないウェッブに高圧液体柱状流を施すと、
複合連続単糸群や割繊フィラメント群は自由に運動する
ことができ、従ってウェッブの走行方向即ち機械方向に
専ら運動し、交絡が主として機械方向（縦方向）に施さ
れるのである。従って、縦方向には引張強力が高く横方
向には引張強力が低くなって引張強力の差が大きくな
り、更に伸度差も大きい交絡不織布となってしまうので
ある。本発明において、部分的な熱圧着処理を受けたウェッブ
は、一旦ロール状に巻き上げた後、別工程で高圧液体柱
状流を作用させて分割割繊と交絡付与を行ってもよい。
また、部分的な熱圧着処理に引き続き、連続して高圧液
体柱状流による処理を施してもよい。高圧液体柱状流による分割割繊と交絡の付与工程の前
に、交絡等を促進させるために、ウェッブの構成単糸間
に存在する空気を水で置換するのが好ましい。具体的に
は、ウェッブに水を付与すればよい。高圧液体柱状流は、液体を噴射孔を通して高圧で噴射す
れば得ることができる。噴射孔としては、一般的に口径
が0.05〜1.0mm、特に0.1〜0.4mm程度のものが採用され
る。また、噴射圧力としては、５〜150kg/cm²Ｇ程度の
圧力が採用される。また、液体としては、取り扱いの容
易さから、一般的に水又は温水が採用される。噴射孔とウェッブとの距離は、１〜15cm程度が好適であ
る。この距離が15cmを超えると、液体がウェッブに与え
る衝撃力が低下し、割繊や交絡の効果が低下する傾向と
なる。また、1cm未満になると、ウェッブの地合が乱れ
る傾向となる。高圧液体柱状流をウェッブに作用させると、熱圧着され
ていない部位に存在するウェッブ中の構成単糸群は、以
下の如き変化を受ける。即ち、まず低融点重合体から成
るフィラメント若しくは高融点重合体から成るフィラメ
ントに後刻分割される先駆的な部分分割糸、又は低融点
重合体から成る割繊フィラメント若しくは高融点重合体
から成る割繊フィラメントの発現が進行し、これにつれ
て割繊フィラメント群同士又は割繊フィラメント群と複
合連続単糸群との間に三次元的な交絡が発生する。低融
点重合体と高融点重合体とが未分割状態にある部分的割
繊状態の部分分割糸も、その部分分割糸の繊度が0.05〜
0.8デニールの範囲にある限り、本発明における割繊フ
ィラメントの範疇に包含されるものである。割繊フィラメント群同士又は割繊フィラメント群と複合
連続単糸群とによる三次元的な交絡が発生することによ
り、ウェッブ中の割繊フィラメント群等に緊密な交絡結
合が行われ、割繊フィラメントと言う極細繊維の発現に
よる繊細なタッチと、柔軟で強伸度のバランスの良い交
絡不織布となるのである。最終的には、熱圧着されてい
ない部位の不織布表面が、分割割繊された割繊フィラメ
ント群で実質的に構成されるまで、高圧液体柱状流の噴
射をウェッブに繰り返し施すのが好ましい。しかし、本
発明において重要な点は、先に形成した部分的な熱圧着
部位を得られた交絡不織布中に残存せしめるよう、割繊
交絡処理を行うことである。従って、高圧液体柱状流を
施し過ぎて、熱圧着部位を完全に破壊してしまうような
ことは、回避しなければならない。また、熱圧着部位に
貫通孔を開けてしまうようなことも、なるべく回避した
方が好ましい。一般的に、高圧液体柱状流の噴射孔はウェッブの進行方
向と交叉する方向に列状に配置される。片面処理の場
合、均一な分割割繊や緊密な交絡結合を得るためには、
高圧液体柱状流の噴射処理を少なくとも二列以上、好ま
しくは三列以上で行うのがよい。液体の噴射圧は、前段
側で低く、後段側で高くするのが、交絡不織布の地合の
均一化のために好ましい。更に、本発明に係る交絡不織布の組織或いは柄は、高圧
液体柱状流の処理時に使用する担持スクリーンの目開き
若しくはスクリーン織り組織を適宜選択することによ
り、変更可能である。高圧液体柱状流で分割割繊交絡処理を施された不織布は
その後、過剰の水分を機械的絞りで除去した上、乾燥・
熱処理されて最終製品となる。熱処理温度時間は、単に
水分の除去に留まらず、適度の収縮を許容するように選
ぶ事もできる。熱処理は乾熱処理や湿熱処理であってよ
い。以下、図面によって、本発明の好ましい形態を説明する
が、本発明はこの方法に限られるものではなく、既に述
べた通り、工程を複数に分割する等適宜変更が可能であ
る。第５図は、本発明に係る交絡不織布の製造方法の一実施
態様を説明する工程図である。紡糸装置は、繊維形成性
低融点重合体と繊維形成性高融点重合体との個別溶融押
し出し・計量部（１），（２）を有する。計量された両
重合体は、紡糸口金（３）で複合され、多数の複合連続
単糸群（４）として紡出される。この際、紡糸口金の吐
出孔は、第１〜４図に例示される如く両重合体が共に単
糸の表面に露出しており、しかも単糸の断面内において
一方の重合体が他方の重合体により分割割繊可能な形に
仕切られている単糸が得られるように、選択される。ま
た、両重合体の吐出量は、分割割繊後の割繊フィラメン
トの繊度が0.05〜0.8デニールになるように選択され
る。吐出された複合連続単糸群（４）は冷却装置（５）によ
る冷却を受けた後、エアーサッカー（６）から成る引き
取り手段によって引き取られ、次いで分割型二成分複合
連続単糸群（４）として、高圧電場中のコロナ放電開繊
器（７）を介して、スクリーンから成る移動堆積装置
（８）上に開繊されて、ウェッブ（９）となる。ウェッ
ブ（９）は、仮圧ロール（10）で移送に耐える圧着を付
与された後、熱エンボスロール（11）により、分割型二
成分複合連続単糸群（４）が低融点重合体によって部分
的に熱圧着される。この時点で、ウェッブは既に説明し
た如く、100g/m²の目付のウェッブに換算した場合の5cm
幅当りの引張強力の縦・横合計値を20kg以上とするのが
好ましい。次いで、熱圧着されたウェッブはスクリーン（12）で担
持されつつ、水付与装置（13）で付与され、その後複数
列の高圧液体柱状流処理装置（14）から噴射される水流
で、分割割繊交絡の処理を受ける。噴射水は、真空吸引
装置（15）により排出される。交絡処理を受けた不織布
は、マングルロール（16）で絞られ、乾燥・熱処理装置
（17）に通した後、製品ロール（18）として巻き上げら
れるのである。第５図では、片面からの高圧液体柱状流の噴射処理を例
示したが、本発明において、スクリーン（12），高圧液
体柱状流処理装置（14），真空吸引装置（15）を多段に
設け、ウェッブを反転させて噴射処理を行うことによ
り、両面からの噴射処理も実施しうることは、言うまで
もない。以下実施例によって、本発明を更に具体的に説明する
が、これによって本発明が限定されるものではない。The present invention relates to a fiber-forming low-melting polymer and a polymer which is incompatible with the low-melting polymer and has a melting point of 30 to 180 from the melting point of the low-melting polymer.
C. A split type two-component composite continuous single yarn group consisting of a fiber-forming high melting point polymer having a high melting point of 1 ° C. and a single yarn fineness of 1 to 12 denier, and the low melting point polymer developed by the splitting of the composite continuous single yarn or Single yarn fineness composed of the high melting point polymer is 0.05
A non-woven fabric composed of split filaments of 0.8 to 0.8 denier, wherein the non-woven fabric is not three-dimensionally entangled with the composite continuous single yarn and is at least partially thermocompressed with the low melting point polymer. And a portion where the split filament group or the split continuous filament group and the composite continuous single yarn group are three-dimensionally entangled, and the tensile strength of the nonwoven fabric in the longitudinal direction and the transverse direction. The ratio is 0.3 to 3.0: 1, and the breaking elongations in both directions are both 100% or less. The entangled nonwoven fabric according to the present invention is composed of a split type two-component composite continuous single yarn group and a split filament group expressed by the division of the composite continuous single yarn. The split type bicomponent composite continuous single yarn is formed of a fiber-forming low melting point polymer and a fiber forming high melting point polymer. Both of the polymers are exposed on the surface of the single yarn, and one polymer is partitioned by the other polymer into a shape capable of being split and split in the cross section of the single yarn. Specific examples of the cross section of the composite continuous single yarn are as shown in FIGS. 1 to 4, but the present invention is not limited to these and various conventionally known ones can be used. Such a split type two component composite continuous single yarn can be produced by using both polymers based on a conventionally known melt composite spinning method. The low melting point polymer and the high melting point polymer are incompatible with each other. When both polymers are compatible with each other, as shown in FIGS. 1 to 4, both polymers are reliably cut in a cross section, and a continuous composite single yarn that can be split in a subsequent step cannot be obtained. , Not preferable. Also, the melting point difference between the low melting point polymer and the high melting point polymer is 30 to 180.
℃. In the present invention, when the polymer has no melting point, its softening point is referred to as the melting point. The melting point difference between both polymers is 30
When it is less than 0 ° C., when the low melting point polymer is subjected to the fusion treatment in the point thermocompression bonding step after forming the web, the high melting point polymer is likely to be adversely affected, and the web is liable to shrink, resulting in dimensional stability. It is not preferable because it becomes defective, or the temperature range for adhesion becomes narrow during thermocompression bonding, which makes temperature control difficult. Further, if the melting point difference between both polymers exceeds 180 ° C., the low-melting point polymer is likely to undergo thermal deterioration during melt-composite spinning of both polymers, making it difficult to practically produce a composite continuous single yarn. Not preferable. In the present invention,
A particularly preferable difference between the melting points of both polymers is 35 to 165 ° C. The single yarn fineness of the split type two-component composite continuous single yarn is 1 to 12 denier. If the single yarn fineness is less than 1 denier, the discharge amount per single hole of the spinneret at the time of melt spinning is reduced, and productivity is reduced, which is not preferable. In addition, increasing the number of holes in the spinneret in an attempt to improve productivity is not preferable because the spinning process becomes unstable. When the single yarn fiber exceeds 12 denier, it is difficult to cool the melt spun yarn and to take it with air sucker, which is not preferable. Further, it is not preferable to reduce the number of holes in the spinneret in order to accelerate the cooling of the yarn, because the productivity will decrease. This split type two-component composite continuous single yarn is split at the boundary between the low melting point polymer and the high melting point polymer when the high pressure liquid columnar flow is collided in the subsequent step, and the split filament made of the low melting point polymer and Split filaments made of a high melting point polymer are developed. In the present invention, the single filament fineness of this split filament is 0.05 to 0.8 denier. If the single yarn fineness of the split filament is to be less than 0.05 denier, it is necessary to reduce the single yarn fineness of the original split type two-component composite continuous single yarn or to make the split number extremely large. However, the former case is not preferable because the productivity of the composite continuous single yarn is lowered. Also, in the latter case, the structure of the discharge holes of the spinneret becomes complicated, the spinneret becomes expensive, and the number of discharge holes within a certain area of the spinneret decreases, so that the total discharge amount decreases. This leads to a decrease in productivity, which is not preferable. Furthermore,
If the number of splits is large, split splitting for expressing split filaments becomes difficult, which is not preferable. On the other hand, if the single filament fineness of the split filament exceeds 0.8 denier, the texture of the resulting entangled nonwoven fabric is deteriorated and the flexibility is impaired, so that an extremely delicate surface touch cannot be obtained, which is not preferable. In the present invention, as a combination of the low melting point polymer and the high melting point polymer constituting the split type two-component composite continuous single yarn,
Polyolefin / polyamide, polyolefin / polyester, polyamide / polyester, etc. are mentioned, but these are representative examples and other various combinations are also arbitrarily adopted. Examples of the fiber-forming polyolefin-based polymer that can be used in the present invention include aliphatic α-monoolefins having 2 to 18 carbon atoms, such as ethylene, propylene and butene-1,
There are homo- or co-polyolefins of pentene-1,3-methylbutene-1, hexene-1, octene-1, dodecene-1, octadecene-1. Aliphatic α-monoolefins are other olefins and / or small amounts (up to about 10% by weight of polymer) of other ethylenically unsaturated monomers such as butadiene, isoprene, pentadiene-1.
-It may be copolymerized with a similar ethylenically unsaturated monomer such as 3, styrene or α-methylstyrene. Especially in the case of polyethylene, those copolymerized with propylene, butene-1, hexene-1, octene-1 or a similar higher α-olefin in an amount of up to about 10% by weight of the polymer are preferable. Examples of fiber-forming polyamide polymers that can be used in the present invention include nylon 4, nylon 46, nylon 6, and nylon 6
6, Nylon 610, Nylon 11, Nylon 12 and polymeta-xylene adipamide (MXD-6), polyparaxylylene decanamide (PXD-12), polybiscyclohexylmethane decanamide (PCM-12) or their monomers There is a copolyamide having a structural unit of. Examples of the fiber-forming polyester polymer which can be used in the present invention include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid or adipic acid, sebacic acid as acid components. Homo-synthesized from aliphatic dicarboxylic acids or their esters such as, and diol compounds such as ethylene glycol, diethylene glycol, 1,4-butanediol, neopentyl glycol, cyclohexane-1,4-dimethanol as alcohol components Polyester or a copolyester, and paraoxybenzoic acid, 5-sodium sulfoisophthalic acid, polyalkylene glycol, pentaerythritol, bisphenol A, etc. may be added or copolymerized to the above polyester. Examples of other fiber-forming polymers include vinyl polymers, specifically, polyvinyl alcohol, polyvinyl acetate, polyacrylic acid ester, ethylene vinyl acetate copolymer, polyvinyl chloride, polyvinyl chloride. Vinylidene or a copolymer thereof is used. Moreover, a polyphenylene polymer or a copolymer thereof can also be used. The fiber-forming low melting point polymer and high melting point polymer,
Any additive such as a matting agent, a pigment, a flameproofing agent, a deodorant, an antistatic agent, an antioxidant and an ultraviolet absorber may be added to the extent that the object of the present invention is not impaired. The split type two-component composite continuous single yarn in the present invention is spun by a conventionally known melt composite spinning method, and is cooled by a blowing wind using a conventionally known cooling device such as lateral spraying or annular spraying,
In general, air soccer is used to pull and thin the fiber to the desired fineness. The pulling speed is preferably 2000 m / min or more, particularly about 3000 m / min or more. A composite continuous single yarn group discharged from an air sucker is generally a moving and depositing device such as a conveyer composed of a screen after being charged and opened by passing through a corona discharge region in a high piezoelectric field or a friction collision region. A web is formed by spreading and depositing the fibers. The weight of the web is preferably about 10 to 150 g / m ^m . When the basis weight of the web is about 40 g / m ^m or less, it is easy to advance the split splitting of the composite continuous single yarn through the entire thickness of the web by the action of the high pressure liquid columnar flow. When it is about 50 g / m ² or more, unsplit monofilaments, that is, composite continuous single yarns, remain in the central portion of the web thickness. The entangled nonwoven fabric according to the present invention also includes a type of nonwoven fabric in which the composite continuous single yarn remains in the central portion of the web thickness. The web thus obtained is treated using a point thermocompression bonding apparatus so that the split type two-component composite continuous single yarn group is partially thermocompressed. Before this thermocompression bonding process, the web carried on the moving deposition apparatus may be pressed by a temporary pressure roll on the moving deposition apparatus so that the web strength is sufficiently increased so as to sufficiently withstand the transfer. In order to carry out thermocompression bonding effectively and at high speed, it is essential that the difference in melting point between both polymers described above is 30 ° C. or more. This partial thermocompression bonding can be carried out using a normal hot embossing roll or an ultrasonic welding device which has recently been put into practical use. Point The shape of the crimping part in thermocompression bonding is round, oval,
Any shape such as a rhombus, a triangle, a T shape, and a well shape may be used. Moreover, it is preferable that the pressure bonding area ratio is 5 to 50%. That is, it is preferable that the region where the thermocompression bonding is performed: the region where the thermocompression bonding is not performed = 1: 1 to 19. If the pressure-bonding area ratio exceeds 50%, the resulting nonwoven fabric tends to be rigid and its flexibility tends to decrease. Further, when the crimping area ratio is less than 5%, the partial thermocompression bonding portion due to the low melting point polymer constituting the split type bicomponent composite continuous single yarn is insufficient, and the balance of tensile strength and the purpose of the present invention are It tends to be difficult to obtain good dimensional stability such as low elongation. In the present invention, the web is preferably partially thermocompression-bonded so that the total vertical and horizontal values of tensile strength per 5 cm width when converted to a web with a basis weight of 100 g / m ² is 20 kg or more. . The partially thermocompressed web is generally 10% under a load of 50 kg / 5 cm per unit weight (g / m ² ) before the next high pressure liquid columnar flow. In the following, particularly, the elongation of 5% or less is shown. By applying a high-pressure liquid columnar flow to the web subjected to such partial thermocompression bonding, split fibers of the composite continuous single yarn and entanglement of split fiber filament groups or split fiber filament groups and composite continuous single yarn group Give. As a result, while the partial thermocompression bonding site remains, the split filament groups and the like are three-dimensionally entangled with each other in the non-thermocompression bonding site, and the balance between the vertical and horizontal tensile strengths, which is the object of the present invention, is obtained. Excellent in vertical and
It is possible to obtain a non-woven fabric having a transverse breaking elongation of 100% or less and excellent dimensional stability. The partial thermocompression treatment of the split type two-component composite continuous single yarn group is performed before the entanglement treatment, that is, the high-pressure liquid columnar flow is applied,
Needless to say, three-dimensional entanglement does not occur in the partial thermocompression bonding site remaining in the obtained entangled nonwoven fabric. What is important in the present invention is that the web is subjected to partial thermocompression bonding, and then the high pressure liquid columnar flow is applied to carry out the entanglement treatment. That is, since the composite continuous single yarn in the web is fixed at the thermocompression bonding site, the composite continuous single yarn group and the split filament group cannot move freely even when a high-pressure liquid columnar flow is applied, The point is that you can exercise only within the regulation range. By limiting this movement,
Entangling is relatively uniformly performed in the machine direction (longitudinal direction) and the width direction (horizontal direction). For example, if a high pressure liquid columnar flow is applied to a web that does not have a thermocompression bonding part,
The composite continuous single yarn group and the split filament group can freely move and therefore move exclusively in the running direction of the web, that is, in the machine direction, and the entanglement is mainly performed in the machine direction (longitudinal direction). Therefore, the tensile strength is high in the machine direction and low in the transverse direction, the difference in tensile strength is large, and the entangled nonwoven fabric has a large difference in elongation. In the present invention, the web which has been subjected to the partial thermocompression treatment may be wound up once in a roll shape, and then subjected to a high pressure liquid columnar flow in a separate step to perform splitting and confounding.
Further, after the partial thermocompression bonding treatment, the treatment with the high-pressure liquid columnar flow may be continuously performed. Before the step of applying split fibers and entanglement by the high-pressure liquid columnar flow, it is preferable to replace the air existing between the constituent single yarns of the web with water in order to promote entanglement and the like. Specifically, water may be applied to the web. The high-pressure liquid columnar flow can be obtained by injecting liquid at high pressure through the injection holes. As the injection holes, those having a diameter of 0.05 to 1.0 mm, especially about 0.1 to 0.4 mm are generally used. As the injection pressure, a pressure of about 5 to 150 kg / cm ² G is adopted. Further, as the liquid, water or warm water is generally adopted because it is easy to handle. The distance between the injection hole and the web is preferably about 1 to 15 cm. If this distance exceeds 15 cm, the impact force exerted by the liquid on the web decreases, and the effect of splitting and entanglement tends to decrease. If it is less than 1 cm, the texture of the web tends to be disturbed. When the high-pressure liquid columnar flow is applied to the web, the constituent single yarn groups in the web existing in the parts that are not thermocompression-bonded undergo the following changes. That is, first, a pioneer partially divided yarn which is later divided into a filament made of a low melting point polymer or a filament made of a high melting point polymer, or a split filament made of a low melting point polymer or a split filament made of a high melting point polymer. Expression progresses, and three-dimensional entanglement occurs between the split filament groups or between the split filament groups and the composite continuous single yarn group. Even the partially split yarn in the partially split state in which the low-melting polymer and the high-melting polymer are in an undivided state has a fineness of 0.05 to
As long as it is in the range of 0.8 denier, it is included in the category of the split filament in the present invention. The three-dimensional entanglement between the split filament groups or between the split filament groups and the composite continuous single yarn group causes a close entanglement bond to the split filament groups in the web, which is called split filament. It is a entangled non-woven fabric with a delicate touch due to the expression of ultrafine fibers and a good balance of softness and high elongation. Finally, it is preferable to repeatedly apply the high-pressure liquid columnar flow to the web until the surface of the non-woven fabric at the portion which is not thermocompression-bonded is substantially constituted by the split split filament groups. However, an important point in the present invention is to perform the split fiber entanglement treatment so that the partially formed thermocompression-bonded portion previously formed remains in the obtained entangled nonwoven fabric. Therefore, it is necessary to avoid that the high pressure liquid columnar flow is excessively applied to completely destroy the thermocompression bonding portion. It is also preferable to avoid opening a through hole in the thermocompression bonding site as much as possible. Generally, the injection holes of the high-pressure liquid columnar flow are arranged in a row in a direction intersecting with the traveling direction of the web. In the case of single-sided treatment, in order to obtain a uniform split fiber and a tight entanglement bond,
It is preferable that the injection treatment of the high-pressure liquid columnar flow is performed in at least two rows or more, preferably three rows or more. It is preferable that the injection pressure of the liquid be low on the front side and high on the rear side in order to make the texture of the entangled nonwoven fabric uniform. Further, the texture or handle of the entangled nonwoven fabric according to the present invention can be changed by appropriately selecting the mesh of the supporting screen or the screen weaving texture used in the treatment of the high pressure liquid columnar flow. The nonwoven fabric that has been subjected to split fiber entanglement treatment with a high-pressure liquid columnar flow is then dried with a mechanical squeeze to remove excess water.
It is heat-treated into the final product. The heat treatment temperature time can be selected not only to remove water but also to allow appropriate shrinkage. The heat treatment may be dry heat treatment or wet heat treatment. Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to this method, and as described above, appropriate modifications such as dividing the process into a plurality of steps can be made. FIG. 5 is a process drawing for explaining one embodiment of the method for producing an entangled nonwoven fabric according to the present invention. The spinning device has individual melt-extruding / measuring units (1) and (2) for the fiber-forming low melting point polymer and the fiber-forming high melting point polymer. The weighed both polymers are compounded by a spinneret (3) and spun as a large number of composite continuous single yarn groups (4). At this time, in the discharge hole of the spinneret, both polymers are exposed on the surface of the single yarn as illustrated in FIGS. 1 to 4, and one polymer is overlapped with the other in the cross section of the single yarn. It is selected so as to obtain a single yarn that is divided by splitting into a shape that can be divided and split. The discharge amount of both polymers is selected so that the fineness of the split filaments after split splitting is 0.05 to 0.8 denier. The discharged composite continuous single yarn group (4) is cooled by a cooling device (5) and then taken by a take-up means composed of an air sucker (6), and then as a split type two-component composite continuous single yarn group (4), A web (9) is formed by opening a moving deposition device (8) consisting of a screen through a corona discharge opening device (7) in a high-voltage field. The web (9) is pressed by a temporary pressure roll (10) so as to endure the transfer, and then the split type two-component composite continuous single yarn group (4) is partially covered with a low melting point polymer by a hot embossing roll (11). It is thermocompression bonded to. At this point, the web is 5 cm when converted to a web with a basis weight of 100 g / m ² as described above.
It is preferable that the total vertical and horizontal tensile strength per width is 20 kg or more. Next, the thermocompression-bonded web is carried by the screen (12), applied by the water applicator (13), and then sprayed from a plurality of rows of high-pressure liquid columnar flow treatment devices (14) to split the split fibers. Get confused. The water jet is discharged by the vacuum suction device (15). The entangled nonwoven fabric is squeezed by a mangle roll (16), passed through a drying / heat treatment device (17), and then wound up as a product roll (18). In FIG. 5, the injection process of the high-pressure liquid columnar flow from one surface is illustrated, but in the present invention, the screen (12), the high-pressure liquid columnar flow treatment device (14), and the vacuum suction device (15) are provided in multiple stages, Needless to say, the jetting process can be performed from both sides by reversing the web and performing the jetting process. Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

【Example】

実施例中に記載した物性値の評価法は、次の通りであ
る。（ａ）重合体の融点：パッキンエルマー社製DSC−２
型の示差走査型熱量計を用い、昇温速度20℃／分で測定
した融解吸熱ピークの極値を与える温度を融点とした。（ｂ）ウェッブ及び不織布の引張強力:JIS L−1096に
記載のストリップ法に準じ、幅5cm,長さ10cmの試験片か
ら最大引張強力を測定した。流体処理前縦横合計強力
は、上記方法で求めた、縦強力と横強力の和を［（100/
目付（g/m²）］倍し、100（g/m²）の目付のウェッブに
換算した値である。（ｃ）ウェッブ及び不織布の引張伸度：（ｂ）と同法
で測定した切断時の伸度である。（ｄ）ウェッブ及び不織布の目付（g/m²）×50g/5cm
幅の荷重下における伸度（％）：引張強力−引張伸度測
定時における強力−伸度曲線より、試料目付（g/m²）×
50gの強力値に相当する伸度値を読みとった。（ｅ）不織布の密度：厚さ計（荷重5g/m²）により測
定した厚さ値と目付値から算出した。（ｆ）不織布のトータルハンド：これは柔軟性を示す
ものでJIS L−1096のハンドルオメーター法に準じ，ス
ロット幅1cmで測定した。（ｇ）デニール：分割割繊後のデニールは、電子顕微
鏡写真での形状寸法から断面積を算出して、密度補正を
行い求めた。実施例1A 低融点重合体として、融点が128℃,ASTM−Ｄ−1238
（Ｅ）の方法で測定して得られるメルトインデックス値
が25g/10分のポリエチレンを使用し、高融点重合体とし
て、融点が258℃，フエノール：テトラクロロエタン＝
1:1の混合溶媒中20℃で測定して得られる固有粘度
［η］＝0.7のポリエチレンテレフタレートを使用し
た。そして、糸断面が第１図に示す如き形態で全分割数
が24個になる複合紡糸口金を用い、ポリエチレンとポリ
エチレンテレフタレートの複合比を1:1とし、ポリエチ
レンの溶融温度230℃，ポリエチレンテレフタレートの
溶融温度285℃，単孔吐出量＝1.2g/分（ポリエチレン＝
0.6g/分，ポリエチレンテレフタレート＝0.6g/分）で溶
融押出しした。その後、冷却装置で紡出糸条を冷却し、
次いで紡糸口金下120cmの位置に配置された複数個のエ
アーサッカーにより4500m/分の速度で引き取り、コロナ
放電開繊器にて開繊させ、移動する金網製の堆積装置に
複合連続単糸群を堆積させウェッブとした。該ウェッブ
から採取した複合連続単糸の繊度は、約2.5デニールで
あった。次いで、該ウェッブを表面温度が105℃の仮圧ロールに
導き、更に圧着面積率が12％，ポイント柄，表面温度が
120℃の熱エンボスロールを用いて部分的に熱圧着せし
めた。熱圧着させたウェッブを巻き上げることなく、速
度10m/分で移動している78メッシュのスクリーンに供給
し、水付与装置で水を付与し、次いで高圧水柱状流にて
分割割繊交絡処理を行った。高圧水柱状流処理は，孔径
0.12mm,孔数600,孔ピッチ0.6mm,噴射孔群３列で、該ウ
ェッブの上方80mmの位置から高圧水柱状流を作用せしめ
た。ウェッブ表裏を水圧80kg/cm²で各々３回ずつ処理を
行った。更に、マングルロールにて水分を絞り、98℃の
乾燥・熱処理装置により処理し、目付約40g/cm²の不織
布を得た。得られた不織布は、ポイント熱圧着装置にて部分的に熱
圧着された部位を除き，ポリエチレンより成る割繊フィ
ラメント群とポリエチレンテレフタレートより成る割繊
フィラメント群が交絡し、非常に柔軟性に富み、かつ緻
密な構造を有する不織布であった。得られた不織布の性
能は第１表に示す如く、柔軟性，寸法安定性，機械特性
の全てに優れたものであった。なお、ポリエチレン及び
ポリエチレンテレフタレートから成る割繊フィラメント
の繊度は，各々0.1デニールであった。実施例1B 熱エンボスロールの圧着面積率を56％とした以外は、実
施例1Aと同一条件で目付約40g/m²の不織布を得た。得ら
れた不織布は、ポリエチレン及びポリエチレンテレフタ
レートより成る割繊フィラメント群の交絡した部位が少
ないため、実施例1Aで得られた不織布に比べて、若干柔
軟性に欠けるものであった。また、高圧水柱状流による
分割割繊交絡処理により、熱圧着部の一部に穴が開くと
いう問題が生じた。その結果を第１表に示す。実施例1C 熱エンボスロールの表面温度をポリエチレンの融点以上
の132℃とした以外は、実施例1Aと同一条件下で目付約4
0g/m²の不織布を得た。得られた不織布は、熱圧着温度
があまりにも高いため、実施例1Aで得られた不織布に比
べて、若干柔軟性に欠けるものであった。また、高圧水
柱状流による分割割繊交絡処理により圧着部の一部に穴
が開くという問題が発生した。その結果を第１表に示
す。比較例1A 熱エンボスロールでウェッブを熱圧着しない以外は、実
施例1Aと同一条件下で、即ち複合連続単糸群を開繊器に
て開繊させ、移動する金網製の堆積装置に堆積させてウ
ェッブとし、次いで該ウェッブを表面温度が105℃の仮
圧ロールに導き、熱エンボスロールで処理することな
く、連続的に高圧水柱状流にて分割割繊交絡処理を行
い、目付約40g/m²の不織布を得た。製造工程において、部分的な熱圧着部が無いため、高圧
水柱状流による分割割繊交絡処理工程で、高圧水柱状流
により配列されているウェッブ構成が乱される結果とな
り、得られた不織布は目付のバラツキが大きく、縦引張
強力及び横引張張強力とも弱い上に、縦引張強力と横引
張強力の比も大きく，更に縦引張伸度が大きく寸法安定
性に欠けるものであり，到底使用に耐えるものではなか
った。その結果を第１表に示す。比較例1B 比較例1Aで得られた不織布を、実施例1Aで用いた表面温
度120℃のエンボスロールを使用して、部分的に熱圧着
せしめた。得られた不織布は、流体処理により一旦分割割繊されて
本数の増加した多数本の極細単糸が圧着点で固着される
ため、緻密ではあるが、極めて硬い不織布しか得られ
ず、経・緯強力比も満足できるものではなかった。その
結果を第１表に示す。比較例1C 熱エンボスロールの圧着面積率を３％とした以外は、実
施例1Aと同一条件下で目付約40g/m²の不織布を得た。得
られた不織布は，熱圧着部があまりにも少ないため、実
施例1Aで得られた不織布に比べて、縦引張強力および横
引張強力とも弱く、更に縦引張強力と横引張強力の比が
大きく、また縦引張伸度が大きく寸法安定性に欠けるも
のであった。その結果を第１表に示す。実施例２低融点重合体として、融点が225℃,96％硫酸中25℃で測
定した相対粘度2.65のナイロン６を使用し、高融点重合
体として、実施例1Aと同じポリエチレンテレフタレート
を使用した。そして、糸断面が第３図に示す如き形態
で、ポリエチレンテレフタレートの全分割数が８個にな
るような複合紡糸口金を用い、ナイロン６とポリエチレ
ンテレフタレートの複合比を1:2として、ナイロン６の
溶融温度265℃，ポリエチレンテレフタレートの溶融温
度285℃，単孔吐出量＝0.84g/分（ナイロン６＝0.28/
分，ポリエチレンテレフタレート＝0.56g/分）で溶融押
出しした。押出した紡出糸条を冷却装置にて冷却し、次
いで紡糸口金下100cmの位置に配置された複数個のエア
ーサッカーにより、4800m/分の速度で引き取り、コロナ
放電開繊器にて開繊させ、移動する金網製の堆積装置に
複合連続単糸群を堆積させウェッブとした。次いで、該ウェッブを表面温度が135℃の仮圧ローラー
に導き、更に圧着面積率が12％，ポイント柄，表面温度
が205℃の熱エンボスロールにて部分的に熱圧着せしめ
た。該ウェッブを巻き上げることなく、速度10m/分で移
動している78メッシュのスクリーンに供給し、水付与装
置で水を付与し、次いで高圧水柱状流にて分割割繊交絡
処理を行った。その条件は、孔径0.12mm,孔数600,孔ピ
ッチ0.6mm,噴射孔群３列で、噴射孔を該ウェッブの上方
80mmに位置せしめ、ウェッブ表裏を水圧60kg/cm²で各々
３回ずつ処理を行った。更に、マングルロールにて水分
を絞り105℃の乾燥・熱処理装置により処理し、交絡不
織布を得た。得られた不織布は、熱エンボスロールにて部分的に熱圧
着された部位を除き、ナイロン６及びポリエチレンテレ
フタレートより成る割繊フィラメント群が交絡し、非常
に柔軟性に富み、かつ緻密な構造を有する不織布であっ
た。得られた不織布の性能を下記１に示すが、柔軟性，
寸法安定性，機械特性の全てに優れたものであった。な
お、ナイロン６及びポリエチレンテレフタレートより成
る割繊フィラメントの繊度は各々0.53デニール,0.13デ
ニールであった。記１流体処理前縦横合計強力： 84.2（kg/5cm）流体処理後不織布目付： 50.9（g/m²）縦引張強力： 10.2（kg/5cm）横引張強力： 6.4（kg/5cm）縦／横引張強力比： 1.59（−）縦引張伸度： 35.3（％）横引張伸度： 41.4（％）不織布の目付（g/m²）×50g/5cmの荷重下における伸度（％）: 6.3 密度： 0.12（g/m³）トータルハンド： 10.3（ｇ）実施例３低融点重合体として、融点が162℃，メルトフローレー
ト値がASTM−Ｄ−1238（Ｌ）の方法で測定して30g/10分
のポリプロピレンを使用し、高融点重合体として、実施
例1Aと同じポリエチレンテレフタレートを使用した。そ
して、糸断面が第２図に示す如き形態で、全分割数が24
個となる複合紡糸口金を用い、ポリプロピレンとポリエ
チレンテレフタレートの複合比を1:1とし、ポリプロピ
レンの溶融温度250℃，ポリエチレンテレフタレートの
溶融温度285℃，単孔吐出量＝1.4g/分（ポリプロピレン
＝0.7g/分，ポリエチレンテレフタレート＝0.7g/分）で
溶融押出しした。押し出した紡出糸条を冷却装置にて冷
却し、次いで紡糸口金下150cmの位置に配置された複数
個のエアーサッカーにより、4440m/分の速度で引き取
り、コロナ放電開繊器にて開繊させ、移動する金網製の
堆積装置に堆積させウェッブとした。次いで、該ウェッブを表面温度が115℃の仮圧ローラー
に導き、更に圧着面積率が12％，ポイント柄，表面温度
が145℃の熱エンボスロールにて部分的に熱圧着せしめ
た。該ウェッブを巻き上げることなく、速度10m/分で移
動している78メッシュのスクリーンに供給し、水付与装
置で水を付与し、次いで高圧水柱状流にて分割割繊交絡
処理を行った。その条件は、孔径0.12mm,孔数600,孔ピ
ッチ0.6mm,噴射孔群３列で、噴射孔を該ウェッブの上方
80mmに位置せしめ、ウェッブ表裏を水圧80kg/cm²で各々
３回ずつ処理を行った。更に、マングルロールにて水分
を絞った後、102℃の乾燥・熱処理装置により処理し、
目付約40g/m²の不織布を得た。得られた不織布は、熱エンボスロールにて部分的に熱圧
着された部位を除き、ポリプロピレン及びポリエチレン
テレフタレートよりなる割繊フィラメント群が交絡し、
非常に柔軟性に富み、かつ緻密な構造を有する不織布で
あった。得られた不織布の性能を下記２に示すが、柔軟
性，寸法安定性，機械特性の全てに優れたものであっ
た。なお、ポリプロピレン及びポリエチレンテレフタレ
ートより成る割繊フィラメントの繊度は，各々0.12デニ
ールであった。記２流体処理前縦横合計強力： 38.3（kg/5cm）流体処理後不織布目付： 38.3（g/m²）縦引張強力： 8.6（kg/5cm）横引張強力： 5.2（kg/5cm）縦／横引張強力比： 1.65（−）縦引張伸度： 62.6（％）横引張伸度： 71.9（％）不織布の目付（g/m²）×50g/5cm幅の荷重下における伸度（％）: 10.2 密度： 0.10（g/cm³）トータルハンド： 9.2（ｇ）実施例４低融点重合体として、実施例３と同じポリプロピレンを
使用し、高融点重合体として、実施例２と同じナイロン
６を使用した。そして、糸断面が第３図に示す如き形態
で、全分割数が24個となる複合紡糸口金を用い、ポリプ
ロピレンとナイロン６の複合比を1:1とし、ポリプロピ
レンの溶融温度250℃，ナイロン６の溶融温度265℃，単
孔吐出量1.2g/分（ポリプロピレン＝0.6g/分，ナイロン
６＝0.6g/分）で溶融押出しした。紡出糸条を冷却装置
にて冷却し、次いで紡糸口金下140cmの位置に配置され
た複数個のエアーサッカーにより、4200m/分の速度で引
き取り、コロナ放電開繊器にて開繊させ、移動する金網
製の堆積装置に堆積させウェッブとした。次いで、該ウェッブを表面温度が115℃の仮圧ローラー
に導き、更に圧着面積率が30％で、ポイント柄の超音波
振動による摩擦熱を利用した超音波溶着装置にて部分的
に熱溶着せしめた。該ウェッブを巻き上げることなく、
速度5m/分で移動している78メッシュのスクリーンに供
給し、水付与装置で水を付与し、次いで高圧水柱状流に
て分割割繊交絡処理を行った。その条件は、孔径0.12m
m,孔数600,孔ピッチ0.6mm,噴射孔群３列で、噴射孔を該
ウェッブの上方80mmに位置せしめ、ウェッブ表裏を水圧
60kg/cm²で各々３回ずつ処理を行った。更に、マングル
ロールにて水分を絞り、102℃の乾燥・熱処理装置によ
り処理し，目付約40g/m²の不織布を得た。得られた不織布は，超音波溶着装置にて部分的に熱溶着
された部位を除き、ポリプロプレン及びナイロン６より
成る割繊フィラメント群が交絡し、非常に柔軟性に富
み、かつ緻密な構造を有する不織布であった。なお、ポ
リプロピレン及びナイロン６より成る割繊フィラメント
の繊度は，各々0.11デニールであった。得られた不織布
の性能を下記３に示す。記３流体処理前縦横合計強力： 39.4（kg/5cm）流体処理後不織布目付： 42.3（g/m²）縦引張強力： 8.8（kg/5cm）横引張強力： 5.4（kg/5cm）縦／横引張強力比： 1.63（−）縦引張伸度： 54.8（％）横引張伸度： 52.3（％）不織布の目付（g/m²）×50g/5cm幅の荷重下における伸度（％）: 8.3 密度： 0.10（g/cm³）トータルハンド： 9.0（ｇ）実施例５実施例３と全く同一条件下で紡糸，引き取り，ウェッブ
化を行った。次いで、該ウェッブを表面温度が115℃の
仮圧ローラーに導き、更に圧着面積率が12％，ポイント
柄，表面温度が150℃の熱エンボスロールにて部分的に
熱圧着せしめ、該ウェッブを巻き上げた。該ウェッブを
別工程で、速度10m/分で移動している78メッシュのスク
リーンに供給し、水付与装置で水を付与し、次いで高圧
水柱状流にて分割割繊交絡処理を行った。その条件は、
孔径0.12mm,孔数600,孔ピッチ0.6mm,噴射孔群３列で、
噴射孔を該ウェッブの上方80mmに位置せしめ、ウェッブ
表裏を水圧80kg/cm²で各々３回ずつ処理を行った。更
に、マングルロールにて水分を絞った後、102℃の乾燥
・熱処理装置により処理し、目付約40g/m²の不織布を得
た。得られた不織布は、実施例３の連続工程で得た不織布と
同様に、熱エンボスロールにて部分的に熱圧着された部
位を除き、ポリプロピレン及びポリエチレンテレフタレ
ートより成る割繊フィラメント群が交絡し、非常に柔軟
性に富み、かつ緻密な構造を有する不織布であった。不
織布の性能を下記４に示す。記４流体処理前縦横合計強力： 39.2（kg/5cm）流体処理後不織布目付： 41.9（g/m²）縦引張強力： 8.8（kg/5cm）横引張強力： 5.3（kg/5cm）縦／横引張強力比： 1.65（−）縦引張伸度： 58.8（％）横引張伸度： 67.2（％）不織布の目付（g/m²）×50g/5cm幅の荷重下における伸度（％）: 8.6 密度： 0.11（g/cm³）トータルハンド： 9.7（ｇ）実施例６熱エンボスロールの表面温度118℃，圧着面積率を８％
とした以外は、実施例1Aと同一条件下でウェッブ化し
た。次いで、該ウェッブを巻き上げることなく、速度2m
/分で移動している78メッシュのスクリーンに供給し、
水付与装置で水を付与した後、高圧水柱状流にて分割割
繊交絡処理を行った。その条件は、孔径0.12mm,孔数60
0,孔ピッチ0.6mm,噴射孔群３列を有した高圧水柱状流処
理装置を、該ウェッブの上方60mmに位置せしめ、ウェッ
ブ表裏を水圧95kg/cm²で各々５回ずつ処理した。更に、
マングルロールにて水分を絞った後、98℃の乾燥・熱処
理装置により処理し，目付約40g/m²を得た。得られた不織布は、熱エンボスロールにて部分的に熱溶
着された部位を除き、ポリエチレン及びポリエチレンテ
レフタレートより成る割繊フィラメント群が交絡し、非
常に柔軟性に富み、かつ緻密な構造を有する不織布が得
られた。不織布の性能を下記５に示す。記５流体処理前縦横合計強力： 20.6（kg/5cm）流体処理後不織布目付： 42.8（g/m²）縦引張強力： 5.3（kg/5cm）横引張強力： 2.1（kg/5cm）縦／横引張強力比： 2.52（−）縦引張伸度： 75.5（％）横引張伸度： 52.8（％）不織布の目付（g/m²）×50g/5cm幅の荷重下における伸度（％）:20.6 密度： 0.08（g/cm³）トータルハンド： 8.3（ｇ）実施例７不織布の目付を70g/m²に変更した以外は、実施例３と全
く同一条件下で紡糸，引き取り，ウェッブ化，高圧水柱
状流による分割割繊交絡処理を行った。得られた不織布
は、目付が大のため、熱エンボスロールにて部分的に熱
圧着された部位を除き、上層と下層はポリプロピレン及
びポリエチレンテレフタレートより成る割繊フィラメン
ト群が交絡しているが、中間層は割繊しておらず、複合
連続単糸群のままの状態であり、柔軟性と適度な腰を有
し、かつ緻密な構造を有する不織布が得られた。The evaluation methods of the physical property values described in the examples are as follows. (A) Polymer melting point: Packing Elmer DSC-2
The melting point was defined as the temperature at which the extreme value of the melting endothermic peak measured at a temperature rising rate of 20 ° C / min was measured using a differential scanning calorimeter of the type. (B) Tensile strength of web and nonwoven fabric: Maximum tensile strength was measured from a test piece having a width of 5 cm and a length of 10 cm according to the strip method described in JIS L-1096. The total vertical and horizontal strength before fluid treatment is the sum of vertical strength and horizontal strength obtained by the above method [(100 /
Unit weight (g / m ² )] times and converted into a web with a unit weight of 100 (g / m ² ). (C) Tensile elongation of web and non-woven fabric: Elongation at break measured by the same method as in (b). (D) Weight of web and non-woven fabric (g / m ² ) × 50g / 5cm
Elongation under load of width (%): Tensile strength-Strength-tensile curve during tensile elongation measurement, from sample weight (g / m ² ) ×
The elongation value corresponding to a strength value of 50 g was read. (E) Density of nonwoven fabric: Calculated from the thickness value measured by a thickness meter (load 5 g / m ² ) and the basis weight value. (F) Nonwoven fabric total hand: This shows flexibility and was measured with a slot width of 1 cm according to the handle odometer method of JIS L-1096. (G) Denier: The denier after the split splitting was obtained by calculating the cross-sectional area from the shape and dimensions in an electron micrograph and correcting the density. Example 1A Low melting point polymer having a melting point of 128 ° C., ASTM-D-1238
Polyethylene having a melt index value of 25 g / 10 min obtained by the method (E) is used as a high melting point polymer having a melting point of 258 ° C. and phenol: tetrachloroethane =
Polyethylene terephthalate having an intrinsic viscosity [η] = 0.7 obtained by measuring at 20 ° C. in a 1: 1 mixed solvent was used. Then, using a composite spinneret with a yarn cross-section as shown in Fig. 1 and a total number of divisions of 24, the composite ratio of polyethylene and polyethylene terephthalate was 1: 1 and the melting temperature of polyethylene was 230 ° C and polyethylene terephthalate Melting temperature 285 ℃, single hole discharge rate = 1.2g / min (polyethylene =
0.6 g / min, polyethylene terephthalate = 0.6 g / min) were melt extruded. Then, cool the spun yarn with a cooling device,
Next, it is collected at a speed of 4500 m / min by a plurality of air suckers arranged 120 cm below the spinneret, opened with a corona discharge fiber opener, and the composite continuous single yarn group is deposited on a moving wire mesh deposition device. Let it be a web. The fineness of the composite continuous single yarn collected from the web was about 2.5 denier. Then, the web is guided to a temporary pressure roll having a surface temperature of 105 ° C., and the pressure bonding area ratio is 12%, the point pattern and the surface temperature are
A 120 ° C. hot embossing roll was used for partial thermocompression bonding. Without winding the thermocompressed web, it is supplied to a 78 mesh screen moving at a speed of 10 m / min, water is added by a water application device, and then split fiber entanglement treatment is performed by a high pressure water column flow. It was High-pressure water columnar flow treatment, pore size
A high-pressure columnar flow was made to act from a position 80 mm above the web with 0.12 mm, 600 holes, 0.6 mm hole pitch, and 3 rows of injection holes. The front and back of the web were treated with water pressure of 80 kg / cm ² three times each. Further, the water content was squeezed with a mangle roll and treated with a drying / heat treatment device at 98 ° C. to obtain a nonwoven fabric having a basis weight of about 40 g / cm ² . The obtained non-woven fabric is very flexible, except for the part which is partially thermocompressed by the point thermocompression bonding device, in which the split filament group made of polyethylene and the split filament group made of polyethylene terephthalate are entangled. It was also a non-woven fabric having a dense structure. As shown in Table 1, the performance of the obtained non-woven fabric was excellent in flexibility, dimensional stability and mechanical properties. The fineness of the split filaments made of polyethylene and polyethylene terephthalate was 0.1 denier. Example 1B A nonwoven fabric having a basis weight of about 40 g / m ² was obtained under the same conditions as in Example 1A except that the pressure-bonding area ratio of the hot embossing roll was 56%. The obtained non-woven fabric was slightly less flexible than the non-woven fabric obtained in Example 1A because the split filament group consisting of polyethylene and polyethylene terephthalate had few entangled portions. In addition, the split fiber entanglement treatment by the high-pressure water column flow causes a problem that a hole is opened in a part of the thermocompression bonding part. The results are shown in Table 1. Example 1C A unit weight of about 4 was obtained under the same conditions as in Example 1A except that the surface temperature of the hot embossing roll was set to 132 ° C, which was higher than the melting point of polyethylene.
A non-woven fabric of 0 g / m ² was obtained. The obtained nonwoven fabric had a thermocompression bonding temperature that was too high, and thus was slightly less flexible than the nonwoven fabric obtained in Example 1A. In addition, the split fiber entanglement treatment by the high-pressure water column flow causes a problem that a hole is opened in a part of the crimping portion. The results are shown in Table 1. Comparative Example 1A Except that the web was not thermocompression bonded with a hot embossing roll, under the same conditions as in Example 1A, that is, a composite continuous single yarn group was opened with an opening device and deposited on a moving wire mesh deposition device. As a web, then guide the web to a temporary pressure roll with a surface temperature of 105 ° C., without splitting it with a hot embossing roll, continuously perform split fiber entanglement treatment with a high-pressure water column flow, and have a basis weight of about 40 g / m 2. ^Two non-woven fabrics were obtained. In the manufacturing process, since there is no partial thermocompression bonding part, the web structure arranged by the high pressure water columnar flow is disturbed in the split fiber entanglement treatment process by the high pressure water columnar flow, resulting in a nonwoven fabric. The unit weight is large, the longitudinal tensile strength and the lateral tensile strength are weak, and the ratio of the longitudinal tensile strength to the lateral tensile strength is large. Furthermore, the longitudinal tensile elongation is large and it lacks dimensional stability. I couldn't stand it. The results are shown in Table 1. Comparative Example 1B The nonwoven fabric obtained in Comparative Example 1A was partially thermocompression bonded using the embossing roll having a surface temperature of 120 ° C. used in Example 1A. The obtained non-woven fabric is divided and split by fluid treatment once and many extra fine single yarns with an increased number are fixed at the crimping point, so only a non-woven fabric is obtained though it is dense, The strength ratio was also unsatisfactory. The results are shown in Table 1. Comparative Example 1C A nonwoven fabric having a basis weight of about 40 g / m ² was obtained under the same conditions as in Example 1A except that the pressure-bonding area ratio of the hot embossing roll was set to 3%. The resulting non-woven fabric has too few thermocompression bonding parts, so both the longitudinal tensile strength and the lateral tensile strength are weak compared to the non-woven fabric obtained in Example 1A, and the ratio of the longitudinal tensile strength and the lateral tensile strength is large. Further, the longitudinal tensile elongation was large and the dimensional stability was lacking. The results are shown in Table 1. Example 2 Nylon 6 having a melting point of 225 ° C. and a relative viscosity of 2.65 measured in 96% sulfuric acid at 25 ° C. and a relative viscosity of 2.65 was used as the low melting point polymer, and the same polyethylene terephthalate as in Example 1A was used as the high melting point polymer. Then, using a composite spinneret with a yarn cross section as shown in FIG. 3 such that the total number of divisions of polyethylene terephthalate is 8, and the composite ratio of nylon 6 and polyethylene terephthalate is 1: 2, nylon 6 Melting temperature 265 ℃, melting temperature of polyethylene terephthalate 285 ℃, single hole discharge rate = 0.84g / min (nylon 6 = 0.28 /
Min., Polyethylene terephthalate = 0.56 g / min). The extruded spun yarn is cooled by a cooling device, then taken up at a speed of 4800 m / min by a plurality of air suckers placed 100 cm below the spinneret and opened by a corona discharge opener. A composite continuous single yarn group was deposited on a moving wire mesh deposition device to form a web. Then, the web was guided to a temporary pressure roller having a surface temperature of 135 ° C., and further partially thermocompressed by a hot embossing roll having a pressure area ratio of 12%, a point pattern and a surface temperature of 205 ° C. The web was supplied to a 78-mesh screen moving at a speed of 10 m / min without being wound up, water was applied by a water application device, and then split fiber entanglement treatment was performed by a high-pressure water columnar flow. The conditions are as follows: hole diameter 0.12mm, hole number 600, hole pitch 0.6mm, injection hole group 3 rows, with injection holes above the web.
It was positioned at 80 mm, and the front and back of the web were treated with water pressure of 60 kg / cm ² three times each. Further, the water was squeezed with a mangle roll and treated with a drying / heat treatment device at 105 ° C. to obtain an entangled nonwoven fabric. The obtained non-woven fabric has a very flexible and dense structure in which the split filament group consisting of nylon 6 and polyethylene terephthalate is entangled except for the part which is partially thermocompression bonded by a hot embossing roll. It was a non-woven fabric. The performance of the obtained non-woven fabric is shown in 1 below.
It had excellent dimensional stability and mechanical properties. The fineness of the split filaments made of nylon 6 and polyethylene terephthalate was 0.53 denier and 0.13 denier, respectively. Note 1 Total fluid strength before fluid treatment: 84.2 (kg / 5cm) Non-woven fabric after fluid treatment Weight: 50.9 (g / m ² ) Longitudinal tensile strength: 10.2 (kg / 5cm) Lateral tensile strength: 6.4 (kg / 5cm) Vertical / Lateral Tensile Strength Ratio: 1.59 (-) Longitudinal Tensile Elongation: 35.3 (%) Lateral Tensile Elongation: 41.4 (%) Nonwoven fabric basis weight (g / m ² ) × 50 g / 5 cm elongation under load (%): 6.3 Density: 0.12 (g / m ³ ) Total Hand: 10.3 (g) Example 3 As a low melting point polymer, the melting point was 162 ° C. and the melt flow rate value was measured by the method of ASTM-D-1238 (L). The same polyethylene terephthalate as in Example 1A was used as the high melting point polymer using polypropylene of 30 g / 10 min. The yarn cross section is as shown in Fig. 2, and the total number of divisions is 24.
Using a single composite spinneret, the compounding ratio of polypropylene and polyethylene terephthalate is 1: 1, polypropylene melting temperature 250 ℃, polyethylene terephthalate melting temperature 285 ℃, single hole discharge rate = 1.4 g / min (polypropylene = 0.7 g / min, polyethylene terephthalate = 0.7 g / min) were melt extruded. The extruded spun yarn is cooled by a cooling device, and then it is taken at a speed of 4440 m / min by a plurality of air suckers placed 150 cm below the spinneret and opened by a corona discharge spreader. The web was deposited on a moving wire mesh deposition device. Next, the web was guided to a temporary pressure roller having a surface temperature of 115 ° C., and was partially thermocompressed with a hot embossing roll having a pressing area ratio of 12%, a point pattern and a surface temperature of 145 ° C. The web was supplied to a 78-mesh screen moving at a speed of 10 m / min without being wound up, water was applied by a water application device, and then split fiber entanglement treatment was performed by a high-pressure water columnar flow. The conditions are as follows: hole diameter 0.12mm, hole number 600, hole pitch 0.6mm, injection hole group 3 rows, with injection holes above the web.
It was positioned at 80 mm, and the front and back of the web were treated with water pressure of 80 kg / cm ² three times each. Furthermore, after squeezing the water with a mangle roll, it is treated with a drying / heat treatment device at 102 ° C
A nonwoven fabric having a basis weight of about 40 g / m ² was obtained. The obtained non-woven fabric is entangled with a split filament group consisting of polypropylene and polyethylene terephthalate, except for a part which is partially thermocompression bonded by a hot embossing roll,
The nonwoven fabric was extremely flexible and had a dense structure. The performance of the obtained non-woven fabric is shown in the following 2 and was excellent in all of flexibility, dimensional stability and mechanical properties. The fineness of the split filaments made of polypropylene and polyethylene terephthalate was 0.12 denier. Note 2 Before fluid treatment Total vertical and horizontal strength: 38.3 (kg / 5cm) After fluid treatment Non-woven fabric Weight: 38.3 (g / m ² ) Longitudinal tensile strength: 8.6 (kg / 5cm) Horizontal tensile strength: 5.2 (kg / 5cm) Vertical / Transverse Tensile Strength Ratio: 1.65 (-) Longitudinal Tensile Elongation: 62.6 (%) Lateral Tensile Elongation: 71.9 (%) Nonwoven fabric unit weight (g / m ² ) × 50 g / 5 cm Width under load (%) : 10.2 Density: 0.10 (g / cm ³ ) Total hand: 9.2 (g) Example 4 The same polypropylene as in Example 3 was used as the low melting point polymer, and the same nylon 6 as in Example 2 was used as the high melting point polymer. It was used. Then, using a composite spinneret with a yarn cross section as shown in FIG. 3 and a total number of divisions of 24, the compounding ratio of polypropylene and nylon 6 is 1: 1 and the melting temperature of polypropylene is 250 ° C. and nylon 6 is 6: 1. Was melt-extruded at a melting temperature of 265 ° C. and a single hole discharge rate of 1.2 g / min (polypropylene = 0.6 g / min, nylon 6 = 0.6 g / min). The spun yarn is cooled by a cooling device, and then it is taken at a speed of 4200 m / min by a plurality of air suckers placed 140 cm below the spinneret, opened by a corona discharge spreader, and moved. A web was made by depositing on a wire mesh deposition device. Then, the web is guided to a temporary pressure roller having a surface temperature of 115 ° C., and the pressure bonding area ratio is 30%, and the web is partially heat-welded by an ultrasonic welding device using friction heat generated by ultrasonic vibration of a point handle. It was Without rolling up the web,
It was supplied to a 78-mesh screen moving at a speed of 5 m / min, water was applied by a water applicator, and then split fiber entanglement treatment was performed by a high-pressure water columnar flow. The condition is a hole diameter of 0.12 m
m, number of holes 600, hole pitch 0.6 mm, injection hole group 3 rows, the injection holes are positioned 80 mm above the web, and water pressure is applied to the front and back of the web.
The treatment was carried out at 60 kg / cm ² three times each. Further, the water content was squeezed with a mangle roll and treated with a drying / heat treatment device at 102 ° C. to obtain a nonwoven fabric having a basis weight of about 40 g / m ² . The obtained non-woven fabric has a very flexible and dense structure in which the split filament group consisting of polypropylene and nylon 6 is entangled except for the part that is partially heat-welded by an ultrasonic welding device. It was a nonwoven fabric having. The fineness of the split filament made of polypropylene and nylon 6 was 0.11 denier each. The performance of the obtained nonwoven fabric is shown in the following 3. Note 3 Before fluid treatment Total longitudinal strength: 39.4 (kg / 5cm) Non-woven fabric after fluid treatment Weight: 42.3 (g / m ² ) Longitudinal tensile strength: 8.8 (kg / 5cm) Horizontal tensile strength: 5.4 (kg / 5cm) Vertical / Transverse tensile strength ratio: 1.63 (-) Longitudinal tensile elongation: 54.8 (%) Transverse tensile elongation: 52.3 (%) Nonwoven fabric unit weight (g / m ² ) × 50 g / 5 cm Width under load (%) : 8.3 Density: 0.10 (g / cm ³ ) Total hand: 9.0 (g) Example 5 Spinning, take-up and webbing were performed under exactly the same conditions as in Example 3. Then, the web is guided to a temporary pressure roller having a surface temperature of 115 ° C, and the web is rolled up by partially thermocompressing it with a hot embossing roll having a crimping area ratio of 12%, a point pattern and a surface temperature of 150 ° C. It was In a separate step, the web was supplied to a 78-mesh screen moving at a speed of 10 m / min, water was applied by a water application device, and then split fiber entanglement treatment was performed by a high-pressure water columnar flow. The condition is
With hole diameter 0.12mm, hole number 600, hole pitch 0.6mm, injection hole group 3 rows,
The injection hole was positioned 80 mm above the web, and the front and back of the web were treated with water pressure of 80 kg / cm ² three times each. Further, the water was squeezed with a mangle roll, and then treated with a drying / heat treatment device at 102 ° C. to obtain a nonwoven fabric having a basis weight of about 40 g / m ² . The obtained non-woven fabric was entangled with a split filament group composed of polypropylene and polyethylene terephthalate, except for the part which was partially thermocompression bonded by a hot embossing roll, like the non-woven fabric obtained in the continuous process of Example 3. The nonwoven fabric was extremely flexible and had a dense structure. The performance of the non-woven fabric is shown in 4 below. Note 4 Total longitudinal strength before fluid treatment: 39.2 (kg / 5cm) Non-woven fabric after fluid treatment Weight: 41.9 (g / m ² ) Vertical tensile strength: 8.8 (kg / 5cm) Horizontal tensile strength: 5.3 (kg / 5cm) Vertical / Transverse tensile strength ratio: 1.65 (-) Longitudinal tensile elongation: 58.8 (%) Lateral tensile elongation: 67.2 (%) Nonwoven fabric basis weight (g / m ² ) × 50 g / 5 cm Width under load (%) : 8.6 Density: 0.11 (g / cm ³ ) Total hand: 9.7 (g) Example 6 Surface temperature of hot embossing roll 118 ° C, crimping area ratio 8%
A web was formed under the same conditions as in Example 1A except that Then, without winding the web, the speed is 2m
Supply to a 78 mesh screen moving at
After applying water with a water application device, a split fiber entanglement treatment was performed in a high-pressure water columnar flow. The conditions are hole diameter 0.12mm, hole number 60
A high-pressure water columnar flow treatment device having 0, a hole pitch of 0.6 mm, and three rows of injection holes was placed 60 mm above the web, and the front and back of the web were treated 5 times each with a water pressure of 95 kg / cm ² . Furthermore,
After squeezing the water with a mangle roll, it was dried and heat treated at 98 ℃ to obtain a basis weight of about 40g / m ² . The obtained non-woven fabric is a non-woven fabric having a very flexible and dense structure in which a split filament group consisting of polyethylene and polyethylene terephthalate is entangled, except for a part which is partially heat-welded by a hot embossing roll. was gotten. The performance of the non-woven fabric is shown in 5 below. Note 5 Total fluid strength before and after fluid treatment: 20.6 (kg / 5cm) Nonwoven fabric after fluid treatment Weight: 42.8 (g / m ² ) Longitudinal tensile strength: 5.3 (kg / 5cm) Lateral tensile strength: 2.1 (kg / 5cm) Vertical / Transverse tensile strength ratio: 2.52 (-) Longitudinal tensile elongation: 75.5 (%) Transverse tensile elongation: 52.8 (%) Non-woven fabric unit weight (g / m ² ) × 50 g / 5 cm Width under load (%) : 20.6 Density: 0.08 (g / cm ³ ) Total hand: 8.3 (g) Example 7 Spinning, take-up, and web formation under exactly the same conditions as in Example 3 except that the basis weight of the nonwoven fabric was changed to 70 g / m ² . , Split fiber entanglement treatment by high-pressure water column flow was performed. Since the obtained non-woven fabric has a large basis weight, the upper layer and the lower layer are entangled with the split filament group consisting of polypropylene and polyethylene terephthalate except for the part which is partially thermocompression bonded by the hot embossing roll, but the intermediate The layer was not split and remained in the composite continuous single yarn group, and a non-woven fabric having flexibility and an appropriate elasticity and a dense structure was obtained.

【The invention's effect】

以上説明したように、本発明は、分割型二成分複合連続
単糸群を用いてウェッブを形成し、予め部分的に熱圧着
した後、該ウェッブに高圧液体柱状流を作用させ、複合
連続単糸を割繊させると共に割繊フィラメント群同士等
を交絡させるものであるため、得られた交絡不織布は縦
方向と横方向の強伸度差が少なく、両方向にバランスの
とれた引張強度及び伸度を有するという効果を奏する。
また、交絡不織布の表面は、割繊フィラメント群で構成
されることになるため、柔軟性に富み、かつ緻密な表面
構造になっており、更に触感にも優れているという効果
を奏する。従って、本発明に係る交絡不織布は、バッグ基布，ワイ
ピングクロス基布，空調用濾過材，一般工業用濾過材，
人工皮革用基布等の広範な用途に使用することが可能で
ある。As described above, according to the present invention, a web is formed by using a split type two-component composite continuous single yarn group, and the composite continuous single yarn is formed by partially thermocompressing the web in advance and then applying a high-pressure liquid columnar flow to the web. Since the fiber is split and the split filament group is entangled with each other, the obtained entangled nonwoven fabric has little difference in strength and elongation in the longitudinal direction and the transverse direction, and has a balanced tensile strength and elongation in both directions. Has the effect of having.
In addition, since the surface of the entangled nonwoven fabric is composed of the split filament group, it has an effect that it is rich in flexibility and has a dense surface structure, and is also excellent in touch. Therefore, the entangled non-woven fabric according to the present invention includes a bag base cloth, a wiping cloth base cloth, an air conditioning filter material, a general industrial filter material,
It can be used for a wide range of applications such as a base fabric for artificial leather.

[Brief description of drawings]

第１〜４図は、本発明に使用する分割型二成分複合連続
単糸の横断面の一例を示した模式図である。第５図は、
本発明に係る交絡不織布の製造方法の一実施態様を示す
工程概略図である。（４）……複合連続単糸群，（６）……エアーサッカ
ー，（８）……移動堆積装置，（11）……熱エンボスロ
ール，（14）……高圧液体柱状流処理装置1 to 4 are schematic views showing an example of a cross section of a split type two-component composite continuous single yarn used in the present invention. Figure 5 shows
It is a process schematic diagram showing one embodiment of the manufacturing method of the entangled nonwoven fabric concerning the present invention. (4) …… Complex continuous single yarn group, (6) …… Air sucker, (8) …… Movement deposition device, (11) …… Hot embossing roll, (14) …… High pressure liquid columnar flow treatment device

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.⁶ 識別記号庁内整理番号ＦＩ技術表示箇所Ｄ０４Ｈ 3/10 Ｂ 7199−3Ｂ (72)発明者宮原芳基京都府宇治市宇治小桜23 ユニチカ株式会社中央研究所内 (56)参考文献特開昭62−78246（ＪＰ，Ａ) 特開昭53−122872（ＪＰ，Ａ) 特開昭53−111170（ＪＰ，Ａ) 特開昭51−75180（ＪＰ，Ａ) 実開昭51−147683（ＪＰ，Ｕ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location D04H 3/10 B 7199-3B (72) Inventor Yoshimoto Miyahara 23 Uji Kozakura, Uji-shi, Kyoto 23 Unitika Stock (56) Reference JP 62-78246 (JP, A) JP 53-122872 (JP, A) JP 53-111170 (JP, A) JP 51-75180 ( JP, A) Actually open Sho 51-147683 (JP, U)

Claims

[Claims]

1. A fiber-forming low-melting polymer, which is incompatible with the low-melting polymer and has a melting point of 30 to 18 from the melting point of the low-melting polymer.
A split type two-component composite continuous single yarn group having a single yarn fineness of 1 to 12 denier consisting of a fiber-forming high melting point polymer having a high melting point of 0 ° C., and the low melting point polymer developed by the division of the composite continuous single yarn. Or the single yarn fineness composed of the high melting point polymer is 0.
A non-woven fabric comprising a split filament group of 05 to 0.8 denier, wherein the non-woven composite continuous single yarn group is not three-dimensionally entangled and is at least partially thermocompression-bonded by the low melting point polymer. And a portion in which the split filament group or the split filament group and the composite continuous single yarn group are three-dimensionally entangled, and the nonwoven fabric is stretched in the longitudinal and transverse directions. The ratio of power is 0.3-3.0: 1,
Moreover, the entangled nonwoven fabric is characterized in that the breaking elongations in both directions are both 100% or less.

2. A portion where the composite continuous single yarn group is not three-dimensionally entangled and is thermocompression-bonded at least partially by the low melting point polymer, the split filament groups, or the split filaments. The entangled nonwoven fabric according to claim 1, wherein the area ratio of the area where the composite continuous single yarn group is three-dimensionally entangled is 1: 1 to 19.

3. A fiber-forming low-melting polymer, which is incompatible with the low-melting polymer and which has a melting point of 30 to 18 from the melting point of the low-melting polymer.
A single yarn composed of a fiber-forming high-melting point polymer having a high melting point of 0 ° C. and having a fineness of 1 to 12 denier is formed by melt compound spinning, and the compound continuous single yarn group is formed into an air sucker. And the fibers are spread on a movable collecting surface such as a screen conveyor to form a web, and the web is processed using a point thermocompression bonding device to partially thermocompress the composite continuous single yarn group. Then, by applying a high-pressure liquid columnar flow to the partially thermocompression-bonded web, the composite continuous single yarn group is left in the partially thermocompression-bonded part and is present in the non-thermocompression-bonded part. By splitting the composite continuous single yarn, at least a part of the split filament group composed of the low-melting polymer or the high-melting polymer and having a single yarn fineness of 0.05 to 0.8 denier or less is developed, and the split filament group. One another The method for producing an entangled nonwoven fabric according to claim 1, wherein the split filament group and the composite continuous single yarn group are three-dimensionally entangled.

4. The method for producing a entangled nonwoven fabric according to claim 3, wherein an embossing roll heated to a temperature equal to or lower than the melting point of the low melting point polymer is used as the point thermocompression bonding device.

5. The method for producing a entangled nonwoven fabric according to claim 3, wherein an ultrasonic welding device is used as the point thermocompression bonding device.

6. A fiber-forming low-melting polymer and a polymer which is incompatible with the low-melting polymer and has a melting point of 30 to 18 from the melting point of the low-melting polymer.
A step of forming a split type two-component composite continuous single yarn group consisting of a fiber-forming high melting point polymer having a high melting point of 0 ° C. and a single yarn fineness of 1 to 12 denier by melt-complex spinning, and forming the composite continuous single yarn group. Pick up using air soccer,
A step of forming a web by depositing fibers on a movable collecting surface such as a screen conveyor, and an area of a thermocompression bonded portion using an embossing roll heated to a temperature equal to or lower than the melting point of the low melting point polymer. Rate is 5 to 50%
And, when converted to a web with a basis weight of 100 g / m ² , the total tensile strength in the longitudinal and transverse directions per 5 cm width is 2
The composite continuous single yarn group was partially thermocompression bonded by partially thermocompressing the web so that the weight becomes 0 kg or more, and by applying a high-pressure liquid columnar flow to the partially thermocompressed web. The composite continuous single yarn existing in the non-thermocompression-bonded portion is divided to leave the portion, and the single filament fineness of 0.05 to 0.8 denier or less composed of the low melting point polymer or the high melting point polymer is split. And at least partly expressing the filament group, and three-dimensionally entangled the split filament group or the split filament group and the composite continuous single yarn group in a three-dimensional manner. Method.

7. The method for producing a entangled nonwoven fabric according to claim 3, 4, 5, or 6, wherein the partially thermocompressed web is once wound up on a roll, and then a high-pressure liquid columnar flow is applied in a separate step.