JP2663398B2 - Thread opening method - Google Patents

Thread opening method

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Publication number
JP2663398B2
JP2663398B2 JP60159427A JP15942785A JP2663398B2 JP 2663398 B2 JP2663398 B2 JP 2663398B2 JP 60159427 A JP60159427 A JP 60159427A JP 15942785 A JP15942785 A JP 15942785A JP 2663398 B2 JP2663398 B2 JP 2663398B2
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JP
Japan
Prior art keywords
oxide
yarn
ferrite
friction body
friction
Prior art date
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Expired - Fee Related
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JP60159427A
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Japanese (ja)
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JPS6221858A (en
Inventor
昌彦 南出
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YUNICHIKA KK
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YUNICHIKA KK
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Priority to JP60159427A priority Critical patent/JP2663398B2/en
Publication of JPS6221858A publication Critical patent/JPS6221858A/en
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Description

【発明の詳細な説明】 <産業上の利用分野> 本発明は,ポリアミドよりなる連続フィラメント束を
開繊するための糸条の開繊方法に関するものであり,さ
らに詳しくは,圧力気流を用いた糸条吸引装置にて糸条
を引取り,直接不織ウェブを製造するにあたり,単糸開
繊性が良好で目付の均一なウェブを得るための糸条の開
繊方法に関するものである。 <従来の技術> 紡糸ノズルから出た糸条を,圧力気流を用いた糸条吸
引状態にて引取り,直接ウェブとして堆積する方法は,
いわゆるスパンボンド法としてよく知られているが,こ
の方法において重要なことは,引取られた糸条を堆積す
る前に,いかに均一に開繊させるかである。 この目的のために従来より行われている一般的な方法
は,高電圧あるいは摩擦により糸条を帯電させ,その静
電気的反撥力により開繊させる方法であるが,前者の高
電圧を用いる方法では,糸条を十分開繊させるために
は,少なくとも数KV,実用上は数10KVもの高電圧を必要
とし,設備設置にあたっては多額の費用を要するのみな
らず,操業上極めて危険である。 一方,後者の摩擦による方法は,設備が安価で安全性
も高く,その点では有利な方法であるが,開繊程度が不
十分であり,不織布を構成するフィラメントの種類によ
り適用可能な摩擦体の材質が異なり,しかも,必ずしも
摩擦帯電列において離れた物質が有効とは限らないた
め,いかに効果的な材質を見出すかが最大の課題であ
る。 本出願人は,これまでナイロン6よりなる連続フィラ
メント束を摩擦体と接触させ,帯電させて開繊し,堆積
して不織ウェブを製造する方法を研究してきたが,ナイ
ロン6に対しては,鉄,アルミニウム,銅などほとんど
の金属およびそれらの合金が摩擦体として比較的有効で
あることを確認してきた。 ところで,近年不織布の用途として,各種の包材,例
えば菓子の包装材,使い捨てカイロの外装,使い捨て風
呂敷などに使用することが多くなるにつれて,不織布の
隠蔽性が強く要求されるようになり,不織布が安価にし
て柔軟性も保持させるためには,不織布そのものの目
付,すなわち単位面積当りの重量を増やすことなく不透
明性を確保することが必要となってきた。合成遷移の不
透明性を得るには,酸化チタンを原料チップの重合時,
あるいは溶融紡糸時に添加,混練する方法が一般的であ
り,酸化チタン添加量が0.5%程度のものは,いわゆる
セミダルと呼ばれて広く用いられている。 前述したような不織布の用途において十分な不透明性
を得るには,酸化チタンの添加量は1%以上必要で,望
ましくは3%程度の添加が要求される。本発明者はこの
ような事情から,酸化チタンを1%以上添加されたナイ
ロン6よりなるフィラメントにて不織布ウェブを製造す
ることに着手したところ,今まで全く予知し得なかった
新しい難問にぶつかった。 <発明が解決しようとする問題点> すなわち、前述したように,フィラメント束を金属な
どと摩擦帯電させて開繊させる方法では,構成するフィ
ラメントの種類により適用可能な摩擦体の材質が異なる
ことは熟知していたが,さらに,フィラメントを形成す
るポリマーに加えられた添加剤の種類および量によって
も効果が著しく異なるという事実が判明したのである。
ナイロン6の場合,酸化チタンの添加量が0.5%程度の
セミダブルの場合には,ほとんどの金属が摩擦体として
有効であったのだが,酸化チタンの添加量を増やしてい
くと次第に帯電効果が減少し,2%添加,すなわちフルダ
ルになると帯電効果は激減し,全く開繊しなくなってし
まったのである。 <問題を解決するための手段> このような問題を解決すべく鋭意研究の結果,驚くべ
きことに,たとえ酸化チタンが多量に添加されたナイロ
ン6であっても,摩擦体とし,鉄の酸化物を用いれば有
効に開繊しうることを見出したのである。 すなわち,本発明はポリアミドよりなる連続フィラメ
ント束を圧力気流を用いる糸条引取装置にて引取り,直
接不織ウェブを製造するにあたり,表面あるいは全体が
フェライトよりなる摩擦体を吸引装置出口直下に配置
し,衝突させて摩擦帯電させ,その静電気的反撥力によ
り前記糸条を開繊させることを特徴とする糸条開繊方法
を要旨とするものである。 本発明の方法において,錆びた鉄(すなわち,表面が
酸化鉄(III)あるいは四酸化三鉄)の製の摩擦体を用
いると,摩擦帯電によりフィラメントを十分に開繊しう
るが,単なる鉄の錆では摩耗しやすく不利である。した
がって,できるだけ耐摩耗性のいい鉄の錆,あるいはそ
れよりなる物質を得ることが好ましい。そこで,鉄の錆
は赤錆と呼ばれる酸化鉄(III)(化学式Fe2O3)と黒錆
と呼ばれる四酸化三鉄(化学式Fe2O4あるいはFeO・Fe2O
3)であることに着目して探索した結果,フェライトが
フルダルのナイロン6よりなるフィラメント群開繊のた
めの摩擦体としてより好ましいことを見出した。 フェライトとは,酸化鉄(III)を主体に,酸化鉄(I
I)をはじめとする金属酸化物の粉末を混合し,加圧成
形し,高圧で焼結させたセラミックスの一種で,金属と
比較して比重が軽く,高周波用の磁性材料として優れた
電磁特性をもっていることから,近年電子機器に広く用
いられているものであるが,一般に硬度は高く,耐摩耗
性の点では非常に優れている。 第1図は,本発明を実施するための基本的な態様を表
したものであるが,摩擦体5の形状および数量は,本図
のように1枚の平板であっても,第2図のように2枚の
平板であっても,第3図のような凹曲面と平板の組合わ
せであっても,第4図のような凸曲面であっても,さら
には第5図のようなものでもかまわない。前述したよう
に,フェライトは一種のセラミックスであり,加圧成形
し,高圧で焼結させて製造されるので,本発明を実施す
る上で必要となる様々の形状を容易に,しかも多量に製
造できる点でも好都合であり,例えば,多数本の糸条吸
引装置を用いて連続フィラメントを引取り不織ウェブを
製造する場合には,寸法および形状において事実上全く
同一の摩擦体を供給できるという利点もある。したがっ
て,摩擦体の形状が第1図および第2図のように,単純
かつ平面的な板状の場合は当然のことながら,第3図お
よび第4図のように立体的な曲面であっても,一般金属
材料を研削加工するよりは容易に精度よく仕上げること
が可能である。 本発明に用いるフェライトとは,酸化鉄(III)を主
体とし,酸化鉄(II)をはじめとするその他金属酸化物
(例えば,銅,ニッケル,亜鉛,マンガン,マグネシウ
ム,カドミウム,コバルトなどの酸化物)の1種あるい
は数種と組合わせて混合し,加圧成形して高圧で焼成さ
れた複合酸化物を総称しており,第2成分の種類および
第3成分の有無は限定しない。なお,摩擦体全体をフェ
ライトで構成しても,金属製摩擦体の衝突面をフェライ
トでコーティングしたものであってもさしつかえない。
また当然のことながら,本発明におけるフェライトより
なる摩擦体の適用できるフィラメントの素材は,ナイロ
ン6であれば酸化チタンを全く含まないいわゆるブライ
ト,あるいは酸化チタンが0.5%添加されたセミダルで
あっても開繊効果は十分得られ,むしろ帯電効果が大き
すぎて,摩擦体あるいは不織ウェブを堆積するまでの空
間に位置する機台等に静電気的に付着する障害を回避す
る工夫が従来法より必要となる。すなわち,これらの障
害を取り除く工夫,例えば摩擦体との接触面積を減らす
とか,衝突角度を小さくして摩擦力を弱めるとか,帯電
し付着しかけているフィラメントを補助空気流で吹き飛
ばすとかの処置が実施されれば,これまでに使われてい
た一般の金属より有効な摩擦体となりうる。 一方,従来のような一般金属類よりなる摩擦体では十
分な帯電効果の得られなかった酸化チタンが0.5%以上
添加されたフルダルのナイロン6の場合には,今までの
方法では得られない良好な開繊状態の不織ウェブが製造
可能となるが,酸化チタンを3%以上添加すると,紡糸
性が著しく悪化し,安定した操業状態で不織ウェブを製
造することができなくなる場合がある。 本発明を実施するにあたって,摩擦体5の形状および
フィラメント群2が摩擦体5に衝突する角度θ,フィラ
メント群2が摩擦体5と接触する距離Lなどの寸法,さ
らには使用する摩擦面の数および組合わせ方法について
も特に限定されるものではなく,衝突させ,帯電開繊さ
せるべきフィラメント本数や単糸デニール,あるいは添
加された酸化チタンの量等の製造条件に応じて適宜最適
条件が決定されるものであるが,衝突角度θは5ないし
60度,接触距離Lは0以上70mm以下の範囲にするのが望
ましい。なぜなら,衝突角度θが5度以下の場合は,摩
擦面への接触が十分でなく,帯電効果が十分得られない
し,60度以上の場合は,逆に摩擦面に衝突した後のフィ
ラメント群および空気流が摩擦面に沿って流れずにはね
返ってしまい,堆積面でうまく堆積されなかったり,上
部吸引装置よりの噴出流の抵抗となって紡糸が順調に行
われずに,いわゆる吹き上げを生じることもある。この
衝突角度θの最適値は,酸化チタンの添加量が多いほど
大きく,少ないほど小さい値となる。また,接触距離L
は0以上,すなわちフィラメント群を接触さえ出来れば
効果は得られるのだが,あまり長くとりすぎると,せっ
かく摩擦し帯電したフィラメントが逆に静電気的に付着
し,スムーズに搬送堆積されないために開繊不良とな
る。最適条件は,前述の衝突角度θと同様に,酸化チタ
ンの添加量が多いほど大きく,少ないほど小さい値とな
る。 <実施例> 次に,参考例および実施例によって本発明を具体的に
説明する。 参考例1〜5 32個の紡糸孔を有する紡糸ノズル1より溶出されたナ
イロン6のフィラメント束2を,1本の吸引装置3にて引
取り,第1図に示したような1枚の平板よりなる摩擦体
5に衝突させ,コンベアネット7の上に開繊堆積させ
た。 紡糸条件は,ポリマー吐出量27g/分,吸引装置に送り
込んだ高圧空気の圧力2.2kg/cm2Gを設定し,その結果,
紡速5,000m/分,単糸デニール1.5の延伸糸を得た。開繊
条件として摩擦体5の材質に鉄を選び,衝突角度θは20
度とし,接触距離Lを30mmとした。この条件にてナイロ
ン6を紡糸するに際し,原料チップとして酸化チタンを
全く含まないブライトチップを用いたところ,フィラメ
ントの単位面積当りの帯電量は10.8×104cgs esu/m
2で,非常に開繊性良好できれいな不織ウェブを得た。 次に,原料チップとして酸化チップを0.5%含有した
セミダルチップを用いたところ,帯電量は8.4×104cgs
esu/m2と減少したが,開繊性は良好できれいな不織ウェ
ブであった。 さらに,原料チップの酸化チタン含有量を1.0,2.0,3.
0%と増加したところ,帯電量は急激に減少し,酸化チ
タン含有量2.0%のフルダルになるとほとんど帯電せ
ず,開繊性不良となった。 実施例1〜5 一方,摩擦体5の材質として日本フェライト(株)製
のフェライト(品番SB−5S)を用い,参考例と同様の実
施方法で行った。ブライトチップでは帯電量が多すぎる
ためか,衝突角度を10度にすると良好に開繊できた。そ
れ以外は,衝突角度を20度にして行ったところ,酸化チ
タン含有量が0.5%では帯電量は12.2×104cgs esu/m2
なって,開繊製の良いきれいな不織ウェブが得られた。 酸化チタン含有量2.0%のフルダルチップにしても帯
電量は十分あり,開繊製の良好なきれいな不織ウェブを
得ることができた。 さらに酸化チタン含有量を増加して3.0%にすると,
帯電量は6.2×104cgs esu/m2に減少し,やや帯電不足と
なったが,シートの開繊状態はそれほど悪くなかった。 これらの結果は第1表に示したとおりで,摩擦体5の
材質としてフェライトを用いることにより酸化チタンの
含有量が増加しても十分な帯電量が得られ,開繊性の良
好な不織ウェブとなることが確認された。 なお,帯電量の測定はファラデーケージ法により行
い,測定計器はタケダ理研製エレクトロメーターTR−86
51を用いた。実施例6 32個の紡糸孔を有する紡糸ノズルより,酸化チタンを
2.0%含有するナイロン6のフルダルチップを溶出させ,
2.2kg/cm2Gの高圧空気を用いて1本の吸引装置にて紡速
5.000m/分で引取るに際し,前記吸引装置の下部に第2
図に示したような2枚の平板よりなる摩擦体を設置し,
フィラメント束を衝突させて帯電開繊させた。 摩擦体の材質としては,日本フェライト(株)製フェ
ライト(品番SB−5S)を用い,摩擦体を構成する2枚の
平板のうち,最初にフィラメント束が衝突する平板(以
下,第1摩擦体と称す)へのフィラメントの衝突角度θ
は15度とし,接触距離Lは20mmとして,次にフィラメン
ト束が衝突する平板(以下,第2摩擦体と称す)はフィ
ラメント堆積面に垂直に,かつフィラメント束の接触距
離が5mmとなるように設置した。 以上の条件にて実施し,帯電量の時間変化を求めた。
その結果は第2表に示した通りで,5時間経過してもなお
8.7×104cgs esu/m2の帯電量を有しており,開繊性は良
好であった。このことから,フェライトの帯電効果は永
続的であることは明らかである。 <発明の効果> 本発明のポリアミドよりなるフィラメント束の開繊方
法によれば,帯電効果は著しく,開繊性良好な安定した
不織ウェブの生産が可能である。
DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a method of opening a yarn for opening a continuous filament bundle made of polyamide, and more specifically, to a method using a pressure air flow. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of opening a yarn for obtaining a web having a good single yarn opening property and a uniform basis weight when a yarn is drawn by a yarn suction device to directly produce a nonwoven web. <Conventional technology> A method of taking up a yarn coming out of a spinning nozzle in a yarn suction state using a pressurized air flow and directly depositing it as a web is as follows.
It is well known as the so-called spunbond method, but the important thing in this method is how to spread the drawn yarn evenly before depositing it. The general method conventionally used for this purpose is to charge the yarn by high voltage or friction, and to open the fiber by its electrostatic repulsion. However, in order to open the yarn sufficiently, a high voltage of at least several KV, practically several tens of KV is required, which requires not only a large amount of cost but also an extremely dangerous operation. On the other hand, the latter method based on friction is an advantageous method in that the equipment is inexpensive and high in safety, but it is an advantageous method in that respect, but the degree of opening is insufficient, and the friction element that can be applied depending on the type of filaments constituting the nonwoven fabric Since the materials are different from each other, and substances that are separated in the triboelectric series are not always effective, finding the most effective material is the biggest issue. The present applicant has studied a method of manufacturing a nonwoven web by bringing a continuous filament bundle made of nylon 6 into contact with a friction body, charging the fiber, opening the fiber, and depositing the bundle. Most metals such as iron, aluminum, copper and their alloys have been confirmed to be relatively effective as friction bodies. By the way, as the use of nonwoven fabrics in recent years has been increasing, such as the use of various packaging materials such as wrapping materials for confectionery, the exterior of disposable warmers, and disposable wrappers, the concealment of nonwoven fabrics has been strongly required. However, in order to reduce the cost and maintain the flexibility, it is necessary to ensure opacity without increasing the basis weight of the nonwoven fabric itself, that is, without increasing the weight per unit area. To obtain the opacity of the synthetic transition, titanium oxide must be
Alternatively, a method of adding and kneading at the time of melt spinning is generally used, and a method in which titanium oxide is added in an amount of about 0.5% is widely called a semi-dal. In order to obtain sufficient opacity in the use of the nonwoven fabric as described above, the addition amount of titanium oxide is required to be 1% or more, and preferably about 3%. Under such circumstances, the present inventor has begun to manufacture a nonwoven fabric web using a filament made of nylon 6 containing 1% or more of titanium oxide, and has encountered a new problem that has never been predicted before. . <Problems to be Solved by the Invention> That is, as described above, in the method in which the filament bundle is friction-charged with metal or the like to open the fiber, the material of the applicable friction body differs depending on the type of the constituent filament. Although familiar, it has further been found that the effect varies significantly with the type and amount of additives added to the filament-forming polymer.
In the case of nylon 6, in the case of a semi-double with an added amount of titanium oxide of about 0.5%, most metals were effective as friction bodies, but the charging effect gradually decreased as the added amount of titanium oxide was increased. However, the addition of 2%, that is, full-dull, drastically reduced the charging effect, and the fiber did not open at all. <Means for solving the problem> As a result of intensive studies to solve such a problem, surprisingly, even if nylon 6 containing a large amount of titanium oxide was used, it could be used as a frictional body and oxidized iron. It was found that the fiber could be opened effectively by using an object. That is, according to the present invention, a continuous filament bundle made of polyamide is taken up by a yarn take-up device using a pressure air flow, and in directly manufacturing a nonwoven web, a friction body whose surface or the whole is made of ferrite is disposed immediately below a suction device outlet. The yarn-spreading method is characterized in that the yarn is opened by frictional electrification by collision, and the yarn is opened by its electrostatic repulsion. In the method of the present invention, if a friction body made of rusted iron (that is, the surface is made of iron (III) oxide or triiron tetroxide) is used, the filament can be sufficiently opened by triboelectric charging, but the mere iron Rust is disadvantageous because it is easily worn. Therefore, it is preferable to obtain iron rust having as high abrasion resistance as possible or a substance composed of the same. Therefore, the rust of iron is iron (III) oxide (chemical formula Fe 2 O 3 ) called red rust and triiron tetroxide (chemical formula Fe 2 O 4 or FeO · Fe 2 O) called black rust.
As a result of a search focused on 3 ), it was found that ferrite was more preferable as a friction body for opening a filament group made of full-duplex nylon 6. Ferrite is mainly composed of iron oxide (III) and iron oxide (I
A type of ceramic obtained by mixing metal oxide powders such as I), pressing, and sintering under high pressure. Its specific gravity is lighter than metal, and it has excellent electromagnetic properties as a magnetic material for high frequencies. Although it is widely used in electronic devices in recent years, it generally has high hardness and is very excellent in terms of wear resistance. FIG. 1 shows a basic mode for carrying out the present invention, and the shape and quantity of the friction body 5 may be one flat plate as shown in FIG. 5, a combination of a concave curved surface and a flat plate as shown in FIG. 3, or a convex curved surface as shown in FIG. Anything is fine. As described above, ferrite is a type of ceramic, and is manufactured by pressing and sintering under high pressure, so that various shapes required for carrying out the present invention can be easily manufactured in large quantities. This is also advantageous in that, for example, when a continuous filament is drawn using a number of yarn suction devices to produce a nonwoven web, the friction material can be supplied with virtually the same size and shape. There is also. Therefore, when the shape of the friction body is a simple and planar plate as shown in FIGS. 1 and 2, it is natural that the friction body has a three-dimensional curved surface as shown in FIGS. Also, it is possible to finish easily and accurately than grinding a general metal material. The ferrite used in the present invention is mainly composed of iron (III) oxide and other metal oxides such as iron (II) (eg, oxides such as copper, nickel, zinc, manganese, magnesium, cadmium, and cobalt). ) Is generally referred to as a composite oxide which is mixed with one or more of the above-mentioned components, molded under pressure, and fired at a high pressure, and the type of the second component and the presence or absence of the third component are not limited. It should be noted that even if the entire friction body is made of ferrite, the collision surface of the metal friction body may be coated with ferrite.
Naturally, the material of the filament to which the friction body made of ferrite in the present invention can be applied is so-called bright which does not contain titanium oxide at all if it is nylon 6, or semi-dal to which 0.5% of titanium oxide is added. The opening effect is sufficiently obtained, but rather the charging effect is too large, and it is necessary to devise measures to avoid the problem of electrostatically adhering to the machine or the like located in the space until the friction body or the nonwoven web is deposited. Becomes In other words, measures to remove these obstacles, such as reducing the contact area with the frictional body, reducing the frictional force by reducing the collision angle, and blowing away the charged and sticking filament with the auxiliary air flow are implemented. If it is done, it can be a more effective friction body than ordinary metals used so far. On the other hand, in the case of a full-duty nylon 6 containing 0.5% or more of titanium oxide, a sufficient friction effect cannot be obtained with a friction body made of general metals as in the prior art. Although a nonwoven web in an open state can be produced, when 3% or more of titanium oxide is added, the spinnability is remarkably deteriorated, and it may not be possible to produce the nonwoven web in a stable operation state. In practicing the present invention, the shape of the friction body 5, the angle θ at which the filament group 2 collides with the friction body 5, the dimension L such as the distance L at which the filament group 2 comes into contact with the friction body 5, and the number of friction surfaces to be used. The combination method is not particularly limited either, and the optimum conditions are determined as appropriate according to the production conditions such as the number of filaments to be collided, charged and opened, denier of single yarn, or the amount of added titanium oxide. However, the collision angle θ is 5 to
It is desirable that the contact distance L is 60 degrees or less and 70 mm or less. If the collision angle θ is less than 5 degrees, the contact with the friction surface is not sufficient, and the charging effect cannot be obtained sufficiently. The air flow rebounds without flowing along the friction surface, and is not deposited well on the accumulation surface. Also, the spinning does not proceed smoothly due to the resistance of the jet flow from the upper suction device, and so-called blow-up may occur. is there. The optimum value of the collision angle θ increases as the amount of titanium oxide added increases, and decreases as the amount of titanium oxide decreases. Also, the contact distance L
Is 0 or more, that is, the effect can be obtained as long as the filament group can be contacted. Becomes Similar to the above-mentioned collision angle θ, the optimum condition is larger as the amount of titanium oxide added is larger, and smaller as the amount of titanium oxide is smaller. <Examples> Next, the present invention will be specifically described with reference examples and examples. Reference Examples 1 to 5 A filament bundle 2 of nylon 6 eluted from a spinning nozzle 1 having 32 spinning holes is taken up by one suction device 3, and one flat plate as shown in FIG. The fiber was made to collide with the friction body 5 and spread and deposited on the conveyor net 7. The spinning conditions were set at a polymer discharge rate of 27 g / min and a pressure of 2.2 kg / cm 2 G of the high-pressure air sent to the suction device.
A drawn yarn having a spinning speed of 5,000 m / min and a denier of 1.5 was obtained. Iron was selected as the material of the friction body 5 as the opening condition, and the collision angle θ was 20
Degree, and the contact distance L was 30 mm. When spinning nylon 6 under these conditions, when a bright chip containing no titanium oxide was used as a raw material chip, the charge amount per unit area of the filament was 10.8 × 10 4 cgs esu / m 2.
In 2 , a good non-woven web with excellent openability was obtained. Next, a semi-dal chip containing 0.5% of oxidized chips was used as a raw material chip, and the charge amount was 8.4 × 10 4 cgs.
Although it decreased to esu / m 2 , the spreadability was good and the web was clean. Furthermore, the titanium oxide content of the raw material chips was adjusted to 1.0, 2.0, 3.
When it increased to 0%, the charge amount decreased rapidly, and when the titanium oxide content reached 2.0%, almost no charge occurred, resulting in poor spreadability. Examples 1 to 5 On the other hand, ferrite (product number SB-5S) manufactured by Nippon Ferrite Co., Ltd. was used as the material of the friction body 5, and the same method as in the reference example was used. If the collision angle was set to 10 degrees, the fiber could be opened well, probably because the amount of charge in the bright chip was too large. Otherwise, when the collision angle was set to 20 degrees, the charge amount was 12.2 × 10 4 cgs esu / m 2 when the titanium oxide content was 0.5%, and a clean nonwoven web with good spreadability was obtained. Was done. Even with a full-dual chip with a titanium oxide content of 2.0%, the amount of charge was sufficient, and a clean nonwoven web with good spreadability could be obtained. When the titanium oxide content is further increased to 3.0%,
The charge amount was reduced to 6.2 × 10 4 cgs esu / m 2 , and the charge was slightly insufficient, but the spread state of the sheet was not so bad. The results are as shown in Table 1. By using ferrite as the material of the friction body 5, even if the content of titanium oxide increases, a sufficient charge amount can be obtained, and the nonwoven fabric having good spreadability can be obtained. It was confirmed to be the web. The charge amount was measured by the Faraday cage method, and the measuring instrument was Takeda Riken Electrometer TR-86.
51 was used. Example 6 Titanium oxide was supplied from a spinning nozzle having 32 spinning holes.
Eluting a 2.0% nylon 6 full-dal tip,
Spinning speed with one suction device using high pressure air of 2.2kg / cm 2 G
At the time of withdrawing at 5.000 m / min, a second
Install a friction body consisting of two flat plates as shown in the figure,
The filament bundle was collided and charged and opened. The material of the friction body is ferrite manufactured by Nippon Ferrite Co., Ltd. (Part No. SB-5S). Of the two flat plates that compose the friction body, the flat plate with which the filament bundle collides first (hereinafter referred to as the first friction body) Angle θ of the filament
Is set to 15 degrees, the contact distance L is set to 20 mm, and a flat plate (hereinafter referred to as a second friction body) on which the filament bundle collides is perpendicular to the filament deposition surface and the contact distance of the filament bundle is 5 mm. installed. The test was performed under the above conditions, and the time change of the charge amount was obtained.
The results are as shown in Table 2, and even after 5 hours,
It had a charge amount of 8.7 × 10 4 cgs esu / m 2 , and the spreadability was good. From this, it is clear that the charging effect of ferrite is permanent. <Effects of the Invention> According to the method for opening a filament bundle made of polyamide of the present invention, the charging effect is remarkable, and a stable nonwoven web with good opening properties can be produced.

【図面の簡単な説明】 第1図は,本発明によるナイロン6よりなるフィラメン
ト束開繊方法の基本態様であり,1……紡糸ノズル,2……
連続フィラメント束,3……吸引装置,4……吸引装置の高
圧気流供給口,5……摩擦体,6……不織ウェブ,7……コン
ベアネットより構成され,θは連続フィラメント束が摩
擦体へ衝突する角度で,Lは衝突後フィラメント束が摩擦
体に接触する距離である。 第2図から第5図は,摩擦体5の種々実施例で,5−aは
第1摩擦体,5−bは第2摩擦体,5−cは第3摩擦体であ
る。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a basic mode of a filament bundle opening method made of nylon 6 according to the present invention.
Continuous filament bundle, 3 ... Suction device, 4 ... High-pressure air supply port of suction device, 5 ... Friction body, 6 ... Non-woven web, 7 ... Conveyor net, θ is continuous filament bundle friction At the angle of impact on the body, L is the distance that the filament bundle contacts the friction body after impact. FIGS. 2 to 5 show various embodiments of the friction body 5, wherein 5-a is a first friction body, 5-b is a second friction body, and 5-c is a third friction body.

Claims (1)

(57)【特許請求の範囲】 1.ポリアミドよりなる連続フィラメント束を圧力気流
を用いる糸条引取装置にて引取り,直接不織ウェブを製
造するにあたり,表面あるいは全体がフェライトよりな
る摩擦体を吸引装置出口直下に配置し,衝突させて摩擦
帯電させ,その静電気的反撥力により前記糸条を開繊さ
せることを特徴とする糸条開繊方法。 2.ポリアミドよりなる連続フィラメントは,0.5%以
上,3.0%以下の酸化チタンを含有していることを特徴と
する特許請求の範囲第1項記載の糸条開繊方法。 3.摩擦体は,酸化鉄(III)あるいは四酸化三鉄を主
体とし,酸化ニッケル,酸化亜鉛,酸化銅,酸化マンガ
ン,酸化マグネシウム,酸化コバルト,酸化カドミウム
のうち,1種または2種以上の金属酸化物を含有したフェ
ライトであることを特徴とする特許請求の範囲第1項ま
た第2項に記載の糸条開繊方法。
(57) [Claims] A continuous filament bundle made of polyamide is taken up by a yarn take-up device using a pressurized air flow, and in producing a nonwoven web directly, a friction body made of ferrite, whose surface or the whole is made of ferrite, is placed immediately below an outlet of a suction device and collided. A yarn opening method, wherein the yarn is opened by friction charging and the electrostatic repulsion force. 2. 2. The yarn spreading method according to claim 1, wherein the continuous filament made of polyamide contains 0.5% or more and 3.0% or less of titanium oxide. 3. The friction body is mainly composed of iron (III) oxide or triiron tetroxide, and is a metal oxide of one or more of nickel oxide, zinc oxide, copper oxide, manganese oxide, magnesium oxide, cobalt oxide, and cadmium oxide. 3. The method according to claim 1, wherein the ferrite is a ferrite containing a material.
JP60159427A 1985-07-17 1985-07-17 Thread opening method Expired - Fee Related JP2663398B2 (en)

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JPS6221858A JPS6221858A (en) 1987-01-30
JP2663398B2 true JP2663398B2 (en) 1997-10-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801494A (en) * 1987-04-10 1989-01-31 Kimberly-Clark Corporation Nonwoven pad cover with fluid masking properties
CN114232212A (en) * 2021-12-13 2022-03-25 厦门当盛新材料有限公司 Flash spinning equipment based on multi-dimensional steering plate and spinning method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528430B2 (en) * 1973-06-02 1977-03-09
JPS59204958A (en) * 1983-04-28 1984-11-20 旭化成株式会社 Opening of filament group

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