JPH07207564A - Production apparatus for spun-bonded nonwoven fabric - Google Patents
Production apparatus for spun-bonded nonwoven fabricInfo
- Publication number
- JPH07207564A JPH07207564A JP6013977A JP1397794A JPH07207564A JP H07207564 A JPH07207564 A JP H07207564A JP 6013977 A JP6013977 A JP 6013977A JP 1397794 A JP1397794 A JP 1397794A JP H07207564 A JPH07207564 A JP H07207564A
- Authority
- JP
- Japan
- Prior art keywords
- continuous
- air flow
- speed
- flow
- spun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は熱可塑性樹脂より成る連
続長繊維より構成されるスパンボンド不織布の製造装置
に関する。より詳しくは、目付むらが少なく、目付分布
が均一なスパンボンド不織布の製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a spunbonded nonwoven fabric composed of continuous filaments made of thermoplastic resin. More specifically, the present invention relates to an apparatus for producing spunbonded non-woven fabric with less unevenness in areal weight and uniform in areal weight distribution.
【０００２】[0002]
【従来の技術】スパンボンド不織布は、熱可塑性樹脂を
溶融紡糸して連続長繊維群とし、これを高速気流牽引装
置を用いて細化延伸させ、高速気流牽引装置の内外で連
続長繊維群の分布密度を可及的に均一にした後、これを
無端金網コンベア上にウエブ状に堆積させることによっ
て製造される。スパンボンド不織布は比較的廉価に製造
できるため、近年その需要は高まっているが、その品質
については連続長繊維の分布を均一にし、目付分布を均
一にするための技術を得ることが重要な課題となってい
る。2. Description of the Related Art A spunbonded nonwoven fabric is obtained by melt-spinning a thermoplastic resin into a continuous long fiber group, which is thinned and drawn by using a high-speed airflow traction device, and then formed into a continuous long-fiber group inside and outside the high-speed airflow traction device. It is manufactured by making the distribution density as uniform as possible, and then depositing it in web form on an endless wire mesh conveyor. Since spunbonded nonwoven fabrics can be manufactured relatively inexpensively, demand for them has been increasing in recent years, but regarding the quality, it is an important issue to obtain a technique for making the distribution of continuous long fibers uniform and making the basis weight distribution even. Has become.
【０００３】連続長繊維の分布を均一にする方法として
は様々な方法が提案されているが、多数の紡糸孔が直線
状に複数列配された矩形口金から簾状に溶融紡糸された
連続長繊維群を、通過する領域の横断面が狭く、幅広な
矩形断面を有する高速気流牽引装置に導入することが行
われている。この場合、連続長繊維群は最終的に得られ
る不織布製品とほぼ同一の幅を有する紡糸口金、高速気
流牽引装置により幅方向に簾状に配列されるが、繊維が
幅方向に均一に分散しているとは言い難く、均一に分散
させるための開繊技術が数多く提案されている。この開
繊技術としては、高速気流牽引装置から噴出された連続
長繊維群に伴う気流を拡散させその気流の拡散に乗じて
分散する技術、摩擦帯電及びコロナ放電により連続長繊
維群に同極の電荷を印荷し、その反発力により開繊する
技術、連続長繊維群の噴出口を揺動させ、分散幅を広げ
る技術などが知られている。Various methods have been proposed as a method for making the distribution of continuous filaments uniform, but continuous filaments are melt-spun from a rectangular spinneret in which a large number of spinning holes are linearly arranged in a plurality of rows in a blind shape. It has been practiced to introduce the fiber group into a high-speed airflow traction device having a wide rectangular cross-section with a narrow cross-section in the area through which it passes. In this case, the continuous long fiber group is arranged in a widthwise direction like a blind by a spinneret and a high-speed airflow traction device having a width almost the same as that of the finally obtained nonwoven fabric, but the fibers are uniformly dispersed in the widthwise direction. It is hard to say that there are many, and many opening techniques have been proposed for uniform dispersion. As the opening technology, there is a technology of diffusing an air flow accompanying a continuous long fiber group ejected from a high-speed air flow traction device and multiplying by the diffusion of the air flow to disperse it, and a continuous long fiber group of the same polarity by frictional charging and corona discharge. Known techniques include a technique of applying an electric charge and opening the fibers by the repulsive force, a technique of swinging the ejection port of the continuous long fiber group to widen the dispersion width, and the like.
【０００４】これらのいずれにおいても連続長繊維群の
構成繊維は個々に分散され、局所的な部分の繊維の配列
は無秩序となってはいるが、得られた製品を全体に亘っ
てみると厚薄のむら、つまり目付むらを十分満足できる
程度に抑えることは困難であった。In any of these, the constituent fibers of the continuous long fiber group are individually dispersed, and the local arrangement of the fibers is disordered. However, when the obtained product is viewed as a whole, it is thick and thin. It was difficult to suppress the unevenness of the eyes, that is, the unevenness of the fabric weight to a sufficient degree.
【０００５】厚薄むらの発生は以下に述べる二つの事象
に起因すると考えられる。まず、第一に、高速気流牽引
装置から噴出された連続長繊維群は様々な開繊技術によ
って繊維密度が均一に分散せしめられるが、噴射方向に
設けられた無端金網コンベア上に堆積されるまで空中を
気流とともに走行する際の失速により塊状となった連続
長繊維群が不規則に発生し、また、噴出後は、進むにつ
れて気流の拡散幅が増すために繊維塊がコンベアの進行
方向と同方向に揺動し、不規則な周期でコンベア上に堆
積することにより厚薄むらが発生する。The occurrence of thickness unevenness is considered to be caused by the following two events. First of all, the continuous long fiber group ejected from the high-speed airflow traction device has a uniform fiber density dispersed by various opening techniques, until it is deposited on the endless wire mesh conveyor provided in the ejection direction. Clumps of continuous long fibers are irregularly generated due to stall when traveling with airflow in the air, and after jetting, the width of diffusion of the airflow increases as it progresses, so the fiber mass is in the same direction as the conveyor. The swaying in the direction and the uneven thickness cause uneven thickness to be accumulated on the conveyor.
【０００６】この失速は噴出気流の速度、すなわち高速
気流牽引装置に供給する気体の圧力を上げて空中の走行
距離を短くすれば防ぐことができるが、無端金網コンベ
ア上に堆積させる際に連続長繊維群を随伴する気流の速
度および風量が増加するため、コンベア上から繊維流を
繊維と気流とに分離するためにコンベア下部に設けられ
た吸引装置の吸引風速を上げることによって対処せねば
ならず、このための設備費、動力費がかさみ安価に不織
布を得ることを困難としている。This stall can be prevented by increasing the velocity of the jet airflow, that is, by increasing the pressure of the gas supplied to the high-speed airflow traction device to shorten the traveling distance in the air, but the continuous length when depositing on the endless wire mesh conveyor. Since the speed and air volume of the air flow accompanying the fiber group increase, it has to be dealt with by increasing the suction air speed of the suction device provided at the lower part of the conveyor to separate the fiber flow from the conveyor into the fiber and the air flow. However, the equipment cost and power cost for this are bulky, making it difficult to obtain a nonwoven fabric at a low cost.
【０００７】また、紡糸口金を無端金網コンベアの進行
方向に垂直に複数列設置し、これらを積層して不織布ウ
エブを得る場合は気流の速度および風量を上げると２列
目以降の連続長繊維群の堆積部で、予め堆積され進行し
てきた金網コンベア上の不織布ウエブの繊維の配列を乱
すという問題があった。第二に、横断面が狭く、幅広な
矩型断面の高速気流牽引装置を用いた場合、簾状に導入
された連続長繊維群を幅方向に均一に高速気流と共に噴
射するには高度な技術を要することによる。このために
は、高速気流牽引装置の内部、特に噴射口の形状を高精
度に仕上げる必要があり、また、設備費および維持費も
高騰する。さらに、連続長繊維群の噴射にむらが生じ、
繊維密度の片寄った部分に揺動が発生した場合、繊維塊
の発生は更に不規則となって厚薄むらの発生が助長され
る。この噴射むらの揺動は高速気流牽引装置の出口付近
において噴射口壁面が負圧となり、連続長繊維群の両側
の圧力バランスが僅かに変動することに起因するもの
で、これを完全に防ぐのは困難である。また、高速気流
牽引装置に導入される以前に発生する連続長繊維群の揺
動もその一因となっている。Further, when a plurality of rows of spinnerets are installed vertically to the traveling direction of the endless wire mesh conveyor, and when these are laminated to obtain a nonwoven web, the speed and flow rate of the air flow are increased, and the continuous long fiber group from the second row onwards is increased. However, there is a problem in that the fiber arrangement of the non-woven web on the wire mesh conveyor, which has been pre-deposited and progressed, is disturbed in the deposition section of No. Secondly, when a high-speed airflow traction device with a narrow rectangular cross-section and a wide cross-section is used, it is an advanced technique to evenly inject the continuous filaments introduced in the shape of a blind in the width direction together with the high-speed airflow. Due to requiring. For this purpose, it is necessary to finish the inside of the high-speed airflow traction device, especially the shape of the injection port with high accuracy, and the equipment cost and maintenance cost also rise. Furthermore, unevenness occurs in the injection of the continuous long fiber group,
When rocking occurs in a portion where the fiber density is deviated, the generation of fiber lumps becomes more irregular, which promotes the occurrence of uneven thickness. This fluctuation of the jet unevenness is caused by a negative pressure on the jet wall surface near the exit of the high-speed airflow traction device, and the pressure balance on both sides of the continuous long fiber group fluctuates slightly. It is difficult. In addition, swinging of the continuous long fiber group that occurs before being introduced into the high-speed airflow traction device also contributes to this.
【０００８】第二の事象による厚薄むらの発生を抑制す
る技術として、噴射口の断面形状の幅を高速気流牽引装
置の幅方向に亘っていくつかの数に分割し、断面形状の
幅を独立して調節可能とさせることで、連続長繊維群の
噴射速度を高速気流牽引装置の幅方向全体に亘って変更
調整可能とすることが提案されている（特開昭５２−５
９７７５号公報）。しかしながら、この方法は高速気流
牽引装置の加工および維持に依然として手間を要するこ
と、気流速度の僅かな差で連続長繊維群の密度に大きな
差が生じるためにウエブ密度の調整に熟練を要するとい
う問題があった。As a technique for suppressing the occurrence of thickness unevenness due to the second phenomenon, the width of the cross-sectional shape of the injection port is divided into several numbers in the width direction of the high-speed airflow traction device, and the width of the cross-sectional shape is independent. It has been proposed that the jetting speed of the continuous long fiber group can be changed and adjusted over the entire width direction of the high-speed air-flow traction device by making it adjustable (JP-A-52-5).
9775). However, this method still requires time and labor for processing and maintaining the high-speed airflow traction device, and requires a skill to adjust the web density because a difference in the density of the continuous long fiber group is large due to a slight difference in the airflow speed. was there.
【０００９】[0009]
【発明が解決しようとする課題】本発明の目的は、上記
第二の事象による厚さむらの発生を抑制するために、公
知の技術における問題点を解決し、設備の加工及び維持
に労せず簡単な操作により、連続長繊維群の分布むらに
より発生する筋状の厚薄むらを抑えることが可能で、特
に紡糸口金を複数列配置した設備において高速で製造す
る場合においても厚薄むらを抑え、目付分布の均一な、
スパンボンド不織布を製造することができる装置を提供
することにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the problems in the known art in order to suppress the occurrence of thickness unevenness due to the above-mentioned second phenomenon, and to process and maintain equipment without labor. With a simple operation, it is possible to suppress streaky unevenness of thickness that occurs due to uneven distribution of continuous long fiber groups.Especially when manufacturing at high speed in equipment with multiple spinnerets arranged, uneven thickness can be suppressed Uniform distribution,
An object of the present invention is to provide a device capable of producing a spunbond nonwoven fabric.
【００１０】[0010]
【課題を解決するための手段】上記の目的は、本発明の
スパンボンド不織布製造装置、すなわち、紡糸口金から
簾状に溶融紡出された連続長繊維群を無端コンベア上に
ウエブ状に堆積せしめるスパンボンド不織布の製造装置
であって、（イ）紡糸口金から簾状に溶融紡出された連
続長繊維群を高速気流にて牽引して細化延伸するための
長方形断面を有する高速気流による牽引装置、（ロ）該
高速気流による牽引装置の下方に設置され、該高速気流
による牽引装置から簾状に排出される連続長繊維群の走
行方向に対し、主要面が傾斜して設けられていて、該主
要面に突当る連続長繊維の走行方向を転向するための変
向板、および（ハ）連続長繊維群が該変向板に突当る位
置に近接して配置された気流速度調節装置であって、連
続長繊維群の走行に直交する方向（幅方向）に沿って複
数に区分されており、各区分にはそれぞれ気流の流量を
独立して調節することができる流量調節デバイスが設け
られていて、該流量の調節によって連続長繊維を随伴す
る気流の速度の幅方向における分布を調節することがで
きる気流速度調節装置を備えていることを特徴とするス
パンボンド不織布の製造装置によって達成される。Means for Solving the Problems The above-mentioned object is to carry out the spunbonded nonwoven fabric manufacturing apparatus of the present invention, that is, to deposit a continuous filament fiber melt-spun in a blind shape from a spinneret in a web form on an endless conveyor. A spunbonded non-woven fabric manufacturing apparatus, which comprises (a) a high-speed airflow having a rectangular cross section for drawing and stretching a continuous filament fiber melt-spun from a spinneret into a blind shape by a high-speed airflow. A device, (b) is installed below the traction device for the high-speed air current, and the main surface is inclined with respect to the running direction of the continuous long fiber group discharged like a blind from the traction device for the high-speed air current. A deflection plate for diverting the running direction of the continuous filaments that abut the main surface, and (c) an airflow velocity adjusting device arranged in the vicinity of a position where the continuous filament group abuts the deflection plate. And running continuous filaments It is divided into a plurality of sections along the direction (width direction) orthogonal to each other, and each section is provided with a flow rate adjusting device capable of independently adjusting the flow rate of the airflow, and the continuous length is adjusted by adjusting the flow rate. The present invention is achieved by an apparatus for producing a spunbonded non-woven fabric, which is provided with an airflow velocity adjusting device capable of adjusting the distribution of the velocity of the airflow accompanying fibers in the width direction.
【００１１】以下、添付図面を参照しつつ、本発明のス
パンボンド不織布の製造装置について説明する。図１は
本発明の連続長繊維ウエブ密度分布調整装置を備えたス
パンボンド不織布の製造装置の一例を示す斜視図であ
る。図２は、図１に示す製造装置の連続長繊維群密度調
整装置付近の拡大側面図である。An apparatus for producing a spunbonded nonwoven fabric according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of an apparatus for producing a spunbonded non-woven fabric equipped with a continuous long fiber web density distribution adjusting apparatus of the present invention. FIG. 2 is an enlarged side view of the vicinity of the continuous filament group density adjusting device of the manufacturing apparatus shown in FIG.
【００１２】図１において、紡糸口金１は紡糸孔が直線
状に複数列配置された紡糸口金を示し、この紡糸口金か
ら溶融紡糸された連続長繊維群２は、簾状となって、長
方形断面を有する高速気流による牽引装置３に導かれ、
紡糸口金１と高速気流による牽引装置３の間を走行する
間に細化延伸される。高速気流牽引装置３から気流と共
に噴出された連続長繊維群は、高速気流による牽引装置
３の下方に設けられた変向板４と幅方向（連続長繊維群
の走行方向に直交する方向）に噴出気体随伴量が適宜調
整可能な気流速度調節装置５と一対で構成される連続長
繊維群密度調整装置の間を通過する。この装置を通過す
る間に連続長繊維群はその密度分布が調整され、一定の
速度で移動する無端金網コンベア７上に堆積されて、密
度分布が均一な不織布ウエブ８が構成される。気流速度
調節装置５は幅方向全体に亘って複数個に分割されてお
り、分割された個々の区分にはそれぞれ気流の流量を独
立して調節することができる流量調節デバイスが設けら
れている。すなわち、図示の具体例においては、分割さ
れた個々の区分に開孔が設けられ、それぞれの開孔には
開口度調整デバイス６が具備されており、独立して開口
度の調整が可能である。In FIG. 1, a spinneret 1 is a spinneret in which spinning holes are linearly arranged in a plurality of rows, and a continuous long fiber group 2 melt-spun from the spinneret has a rectangular cross section. Is guided to the traction device 3 by a high-speed air flow having
It is thinned and stretched while traveling between the spinneret 1 and the traction device 3 by high-speed air flow. The continuous long fiber group ejected together with the airflow from the high-speed airflow pulling device 3 is in the width direction (direction orthogonal to the running direction of the continuous long fiber group) with the deflection plate 4 provided below the pulling device 3 by the high-speed airflow. It passes between a continuous air flow fiber group density adjusting device and a pair of continuous air flow fiber density adjusting devices 5 capable of adjusting the amount of jetted gas appropriately. While passing through this device, the continuous long fiber group has its density distribution adjusted, and is deposited on the endless wire mesh conveyor 7 moving at a constant speed to form a nonwoven web 8 having a uniform density distribution. The airflow velocity adjusting device 5 is divided into a plurality of pieces over the entire width direction, and each divided section is provided with a flow rate adjusting device capable of independently adjusting the flow rate of the airflow. That is, in the illustrated specific example, an opening is provided in each of the divided sections, and the opening adjusting device 6 is provided in each opening, so that the opening can be adjusted independently. .
【００１３】図２は、一対となった変向板４と気流速度
調節装置５の配置を示している。変向板４は高速気流に
よる牽引装置３の下方に設置されており、変向板４の主
要面は、牽引装置３から簾状に排出される連続長繊維の
走行方向に対し傾斜していて、連続長繊維が変向板４の
傾斜面上に衝突するようになっている。気流速度調節装
置５は、連続繊維が変向板４に突当る位置の近傍ではあ
るが、連続長繊維群２が接触しない位置に配設されてい
る。FIG. 2 shows an arrangement of a pair of the deflection plate 4 and the air flow velocity adjusting device 5. The deflection plate 4 is installed below the traction device 3 driven by a high-speed air flow, and the main surface of the deflection plate 4 is inclined with respect to the running direction of the continuous filaments discharged from the traction device 3 in the shape of a blind. The continuous filaments collide with the inclined surface of the deflection plate 4. The airflow velocity adjusting device 5 is arranged near the position where the continuous fiber hits the deflecting plate 4, but at a position where the continuous long fiber group 2 does not contact.
【００１４】図３は気流速度調節装置５と変向板４の拡
大斜視図である。気流速度調節装置５には、それぞれ独
立して開閉可能な多数の開口が幅方向に多数設けられて
おり、それぞれの開口にはシャッターのような開口度調
節デバイス６が具えられている。開口度調節デバイス６
はそれぞれ独立して開口度を調節する機能をもってお
り、それぞれ気流の流量を独立して調節することができ
る流量調節デバイスを構成している。FIG. 3 is an enlarged perspective view of the air flow velocity adjusting device 5 and the deflection plate 4. The airflow speed adjusting device 5 is provided with a large number of openings that can be opened and closed independently in the width direction, and each opening is provided with an opening degree adjusting device 6 such as a shutter. Aperture control device 6
Have a function of independently adjusting the opening degree, and constitute a flow rate adjusting device capable of independently adjusting the flow rate of the air flow.
【００１５】図４および図５は開口度調節デバイス６の
開口度と高速気流による牽引装置３から噴出された気流
１０と連続長繊維群２の流れを示す模式図である。図４
は開口度調節デバイス６を全閉とした状態であり、連続
長繊維群２は変向板４に突当ってその進行方向が変更さ
れ、変向板４に沿って進み、気流１０は変向板４及び気
流調節装置５との衝突によりその速度は減衰するが、開
口度調節デバイス６が全閉であるため大部分の気流は変
向板４と気流速度調節装置５との隙間を通り連続長繊維
群２と共に進行する。FIGS. 4 and 5 are schematic diagrams showing the opening degree of the opening degree adjusting device 6 and the flow of the air flow 10 and the continuous filament group 2 ejected from the traction device 3 by the high speed air flow. Figure 4
Indicates a state in which the aperture adjusting device 6 is fully closed, the continuous filament group 2 hits the deflecting plate 4 and the traveling direction thereof is changed, and the continuous long fiber group 2 advances along the deflecting plate 4, and the air flow 10 is deflected. The velocity is attenuated by the collision with the plate 4 and the airflow adjusting device 5, but since the aperture adjusting device 6 is fully closed, most of the airflow continues through the gap between the deflecting plate 4 and the airflow adjusting device 5. It progresses with the long fiber group 2.
【００１６】一方、図５は開口度調節デバイス６を全開
にした状態を示しており、気流１０は連続長繊維群２が
平面上を進行するのに対し、層状となって進行している
ため気流の一部は開口度調節デバイス６が開いているこ
とにより連続長繊維群２の進行方向とは異なる方向に分
離放出される。On the other hand, FIG. 5 shows a state in which the aperture adjusting device 6 is fully opened, and the air flow 10 progresses in layers while the continuous continuous fiber group 2 advances on a plane. A part of the air flow is separated and discharged in a direction different from the traveling direction of the continuous continuous fiber group 2 due to the opening degree control device 6 being opened.
【００１７】開口度調節デバイス６による開口度の調整
は、図３に例示するように、それぞれ全閉状態と全開状
態との間で任意に行うことができる。開口度に依存し
て、気流１０が連続長繊維群２と分離される量が異なる
ためその速度に差が生じ、開口度が小さい程変向板４に
よって進行方向が変化せしめられた連続長繊維群２と共
に進む気流１０の速度は大きくなる。すなわち、気流速
度の調節は開口度調節デバイス６により調節が可能であ
る。開口度調節デバイス６は幅方向に複数個に区分され
て配置されており、それぞれ独立して開口度を調整する
ことが可能なため、幅方向全体に亘って気流速度分布プ
ロフィルを任意に設定できる。The adjustment of the opening degree by the opening degree adjusting device 6 can be arbitrarily performed between the fully closed state and the fully opened state, as illustrated in FIG. The airflow 10 is separated from the continuous long fiber group 2 in a different amount depending on the opening degree, and thus the speed thereof is different. The smaller the opening degree is, the more the continuous long fibers whose traveling direction is changed by the deflecting plate 4. The velocity of the air flow 10 traveling with the group 2 increases. That is, the airflow velocity can be adjusted by the opening degree adjusting device 6. Since the opening degree adjusting device 6 is divided into a plurality of parts in the width direction and arranged, and the opening degree can be adjusted independently of each other, the airflow velocity distribution profile can be set arbitrarily throughout the width direction. .
【００１８】噴射気流速度の幅方向における分布に差を
つけると、速度が大きい領域では連続長繊維群は速度の
小さい領域に寄り、また速度が小さい領域では逆に速度
の大きい領域から連続長繊維群が寄ってくるという傾向
が見られる。すなわち、噴射気流の速度に差があると速
度の大きい領域と速度の小さい領域に気圧差が生じ、大
きい領域から小さい領域に気流の一部が流れ、その流れ
に沿って連続長繊維群も移動するため速度の大きい領域
では繊維密度が低下し、速度の小さい領域では繊維密度
が増加するのである。When the distribution of the jet air velocity is made different in the width direction, the continuous long fiber group is closer to the low velocity region in the high velocity region, and conversely in the low velocity region from the high velocity region to the continuous long fibers. There is a tendency for the groups to come closer together. That is, if there is a difference in the velocity of the jet airflow, an air pressure difference occurs between the high-velocity region and the low-velocity region, a portion of the airflow flows from the large region to the small region, and the continuous filament group also moves along the flow. Therefore, the fiber density decreases in the high speed region, and the fiber density increases in the low speed region.
【００１９】本発明のスパンボンド不織布製造装置にお
いては、無端コンベア上に形成される連続長繊維ウエブ
の密度分布を測定し、その密度差に応じて個々の開口度
調節デバイス６により開口度を調節することによって、
走行する連続長繊維群の幅方向密度分布を調整すること
ができる。In the spunbonded nonwoven fabric manufacturing apparatus of the present invention, the density distribution of the continuous long fiber web formed on the endless conveyor is measured, and the opening degree is adjusted by the individual opening degree adjusting devices 6 according to the density difference. By,
The widthwise density distribution of the running continuous filament group can be adjusted.
【００２０】なお、紡糸口金における直線状紡糸孔の配
列は単数であっても複数であっても、本発明のスパンボ
ンド不織布製造装置によれば、連続長繊維群の幅方向密
度分布を調整することは可能である。しかしながら、紡
糸口金列が複数の場合における高速度紡糸の場合は特に
効果が大きい。すなわち、ある紡糸口金列で生じた厚薄
むらが許容範囲を超え単列では修復困難な場合でも複数
列で相互調整することで打ち消すことが可能となるので
ある。Whether the linear spinning holes in the spinneret are single or plural, according to the spunbonded nonwoven fabric manufacturing apparatus of the present invention, the widthwise density distribution of the continuous filament group is adjusted. It is possible. However, the effect is particularly great in the case of high-speed spinning when there are a plurality of spinneret arrays. That is, even if the thickness unevenness generated in a certain spinneret row exceeds the allowable range and it is difficult to repair it in a single row, it is possible to cancel it out by making mutual adjustments in a plurality of rows.
【００２１】本発明で用いる紡糸口金１は幅が５００ｍ
ｍ〜３０００ｍｍ程度の長方形の領域内に数列（５〜１
０列）で幅方向に多数個（１００〜６００個）の紡糸孔
が穿設されたものを用いるのが望ましい。The spinneret 1 used in the present invention has a width of 500 m.
Several columns (5 to 1
It is desirable to use one in which a large number (100 to 600) of spinning holes are provided in the width direction in the 0th row.
【００２２】紡糸される熱可塑性樹脂は、溶融紡糸によ
り繊維形成なものであれば格別限定されるものではない
が、ポリプロピレン、ポリエチレンテレフタレート、ポ
リエチレン、ナイロンなどの熱可塑性樹脂、もしくはこ
れらの混合物、共重合体などを用いることができる。The thermoplastic resin to be spun is not particularly limited as long as it is capable of forming fibers by melt spinning, but thermoplastic resins such as polypropylene, polyethylene terephthalate, polyethylene, nylon, etc., or a mixture thereof, A polymer or the like can be used.
【００２３】高速気流牽引装置３は、図１に示したよう
に、長方形断面を有し、紡糸口金１の下方に紡糸口金１
から簾状に溶融紡糸された連続長繊維群２が十分に延伸
固化され、不織布を構成する連続長繊維としての所望性
質が付与されるに十分な距離を隔てて配置されれば良
い。As shown in FIG. 1, the high-speed airflow traction device 3 has a rectangular cross section, and the spinneret 1 is located below the spinneret 1.
The continuous filament group 2 melt-spun in the form of a cord is sufficiently stretched and solidified, and may be arranged at a sufficient distance so as to impart desired properties as the continuous filament constituting the nonwoven fabric.
【００２４】本発明に用いる変向板４と気流速度調整装
置５から構成される連続長繊維群密度調整装置は、図２
に示したように、高速気流牽引装置３の直下に設置され
ており、高速気流と共に噴出する連続長繊維群２を挟み
込むような形で、且つ気流速度調整装置５が走行繊維に
接触しない位置に配置されている。また、変向板は図示
のように１枚でも、または連続長繊維群２が順次衝突す
るように複数枚が直列に配置された構成でもよい。変向
板を複数枚用いた場合は最終的に連続長繊維群２と衝突
する変向板に気流速度調整装置５を設置すれば十分に本
発明の効果が発揮される。The continuous filament group density adjusting device comprising the deflecting plate 4 and the air flow velocity adjusting device 5 used in the present invention is shown in FIG.
As shown in FIG. 3, it is installed directly below the high-speed airflow traction device 3, and is in a position such that it sandwiches the continuous long fiber group 2 ejected together with the high-speed airflow, and the airflow speed adjusting device 5 does not come into contact with the running fibers. It is arranged. Further, the deflecting plate may be a single plate as shown in the figure, or a plurality of the deflecting plates may be arranged in series so that the continuous filament groups 2 sequentially collide. When a plurality of deflecting plates are used, the effect of the present invention is sufficiently exhibited if the airflow velocity adjusting device 5 is installed on the deflecting plate that finally collides with the continuous filament group 2.
【００２５】変向板４の材質としては、衝突により連続
長繊維群２に同極の電荷を付与せしめる目的とを兼備さ
せるためにいわゆる帯電列の離れた位置に存在するよう
な材質を選択しても良いが、連続長繊維群の衝突による
変形には耐え得る材質であることが求められる。更に変
向板の形状は連続長繊維群と高速気流の進行方向を変更
せしめるものであれば特に規定されず、平面でも曲面で
も、また折曲げてあってもよい。As the material of the deflecting plate 4, a material which is present at a so-called distant position of the charging row is selected for the purpose of giving a charge of the same polarity to the continuous long fiber group 2 by collision. However, the material is required to be able to withstand the deformation due to the collision of the continuous long fiber group. Further, the shape of the deflecting plate is not particularly limited as long as it can change the advancing direction of the continuous long fiber group and the high-speed air flow, and it may be flat or curved, or may be bent.
【００２６】本発明で用いる気流速度調整装置５に配設
される複数個の開口度調節デバイス６の数は紡糸口金１
の幅５０ｍｍに対し１個程度が好ましく、また、開口部
の形状も格別限定されるものではないが、開口部の幅は
３０〜７０ｍｍ程度が好ましく、約５０ｍｍ程度である
ことが特に好ましい。開口部幅が７０ｍｍを超えると細
部の調整が困難となり、３０ｍｍ未満の小さい開口部幅
での細かな調整は一般に不要である。開口部の高さは３
０ｍｍ〜５０ｍｍ程度であることが好ましい。開口部高
さが３０ｍｍより小さいと気流速度調整の範囲が狭くな
り、また５０ｍｍを超えても調整効果は殆ど変わらな
い。また、隣接する開口度調節デバイス６の間隔はでき
るだけ狭い方が連続長繊維群密度の調整が行い易いので
好ましい。The number of opening degree adjusting devices 6 arranged in the air flow velocity adjusting device 5 used in the present invention is the same as that of the spinneret 1.
The width of the opening is preferably about 1 to 50 mm, and the shape of the opening is not particularly limited, but the width of the opening is preferably about 30 to 70 mm, and particularly preferably about 50 mm. If the opening width exceeds 70 mm, fine adjustment becomes difficult, and fine adjustment with a small opening width of less than 30 mm is generally unnecessary. The height of the opening is 3
It is preferably about 0 mm to 50 mm. When the height of the opening is smaller than 30 mm, the range of air flow velocity adjustment becomes narrow, and even when it exceeds 50 mm, the adjustment effect remains almost unchanged. Further, it is preferable that the distance between the adjacent aperture adjusting devices 6 is as narrow as possible because the continuous continuous fiber group density can be easily adjusted.
【００２７】上記のような変向板４と気流密度調整装置
５とによって幅方向の分布密度を均一に揃えられた連続
長繊維群２は目的の目付となるような一定の速度で移動
し、好ましくは、金網の下方に吸引装置を備えた無端金
網コンベア上に堆積され不織布ウエブが形成される。The continuous continuous fiber group 2 having the uniform distribution density in the width direction by the deflecting plate 4 and the air flow density adjusting device 5 as described above moves at a constant speed so as to obtain a desired basis weight. Preferably, the non-woven web is formed by being deposited on an endless wire mesh conveyor equipped with a suction device below the wire mesh.
【００２８】また、本発明のスパンボンド不織布製造装
置においては、紡糸列を複数列設け、それぞれの長繊維
群を積層させて不織布を得てもよく、また、全ての列に
変向板と気流速度調整装置を備えれば目付斑の発生が最
大限に抑えられ、目付分布が均一で地合の優れた不織布
を得ることができる。しかしながら、複数列のうち１列
のみに設置することによっても他の列でやむなく生じた
厚薄むらを打ち消す効果は十分奏される。In the spunbonded non-woven fabric manufacturing apparatus of the present invention, a plurality of spinning rows may be provided and the long fiber groups may be laminated to obtain the non-woven fabric. If the speed adjusting device is provided, the occurrence of the areal weight unevenness can be suppressed to the maximum, and a nonwoven fabric having a uniform areal weight distribution and excellent texture can be obtained. However, even if it is installed in only one row of the plurality of rows, the effect of canceling out the thickness unevenness unavoidably generated in the other rows is sufficiently exerted.
【００２９】[0029]
【実施例】以下、実施例について、本発明のスパンボン
ド不織布製造装置を具体的に説明する。 実施例１ 図１〜図３に示す装置を用いＭＦＲ（メルトフローレー
ト）５０のポリプロピレンを溶融温度２３０℃で矩型形
状の紡糸口金（紡糸孔総数２０００個、列数１０列、１
列の孔数２００個、１列の長さ１０００ｍｍ、孔径０．
４ｍｍ）から１孔当たり毎分１ｇの吐出量で溶融紡糸
し、紡糸口金の下方に配置した高速気流牽引装置は連続
長繊維群を導入させ、毎分約４０００ｍの速度で延伸固
化させ、約２．２デニールの連続長繊維群を得た。EXAMPLES Hereinafter, the spunbonded nonwoven fabric manufacturing apparatus of the present invention will be specifically described with reference to Examples. Example 1 Using the apparatus shown in FIGS. 1 to 3, polypropylene having an MFR (melt flow rate) of 50 was melted at a melting temperature of 230 ° C. to form a rectangular spinneret (total number of spinning holes: 2000, number of rows: 10 rows, 1
The number of holes in a row is 200, the length of a row is 1000 mm, and the hole diameter is 0.
4 mm) per 1 hole per minute and melt spun at a discharge rate of 1 g per hole, and a high-speed air flow traction device placed below the spinneret introduces continuous filaments and draws and solidifies at a speed of about 4000 m / min. A continuous denier fiber group of 0.2 denier was obtained.
【００３０】連続長繊維群は高速気流牽引装置から高速
気流と共に噴出された後、高速気流牽引装置の下方に設
けられた変向板と５０ｍｍ角で個々にシャッターを具備
した開口度調節デバイスを横並びに２０個備えた気流速
度調整装置から成る連続長繊維群密度調整装置内を通過
せしめ、各々のシャッター開口度を調整することで幅方
向に連続長繊維群密度を調整した後、毎分７０ｍの速度
で移動する無端金網コンベア上に堆積し、シート幅が１
１００ｍｍで、目付が２０ｇ／ｍ2 の不織布ウエブを連
続的に得た。After the continuous long fiber group is jetted together with the high-speed airflow from the high-speed airflow traction device, a deflection plate provided below the high-speed airflow traction device and a 50 mm square opening degree adjusting device individually equipped with a shutter are arranged side by side. After passing through the continuous fiber group density adjusting device consisting of 20 air flow velocity adjusting devices and adjusting the shutter opening degree of each, the continuous fiber group density was adjusted in the width direction, and then 70 m / min. Stacked on an endless wire mesh conveyor moving at a speed, the sheet width is 1
A nonwoven web having a basis weight of 100 g and a basis weight of 20 g / m 2 was continuously obtained.
【００３１】この後、上段が無数の小突起を有する熱エ
ンボスロールで下段が平滑ロールである部分的熱圧着処
理装置を用いて圧着し、スパンボンド不織布とした。熱
エンボスロールの小突起は丸型で、直径が０．６ｍｍ、
接着面積率は７％、ロールの表面温度は１４５℃であっ
た。得られたスパンボンド不織布は耳部を５０ｍｍずつ
取り除いた後、横方向に幅が２５ｍｍ、流れ方向に５０
０ｍｍの長さに切断し、個々の重量を測定し、その平均
値と標準偏差を求め、ＣＶ（％）値として（標準偏差／
平均値）×１００で示したところ、５．５％であった。After that, the upper stage was hot-embossed roll having innumerable small protrusions and the lower stage was a smooth roll, and was pressure-bonded using a partial thermo-compression treatment apparatus to obtain a spunbonded nonwoven fabric. The small protrusions of the hot embossing roll are round and have a diameter of 0.6 mm,
The adhesion area ratio was 7%, and the surface temperature of the roll was 145 ° C. The spunbonded non-woven fabric obtained has a width of 25 mm in the transverse direction and 50 in the flow direction after removing 50 mm at each ear.
Cut into a length of 0 mm, measure the individual weights, find the average value and standard deviation, and calculate the CV (%) value (standard deviation / standard deviation /
It was 5.5% when shown by (average value) × 100.
【００３２】実施例２ 実施例１で用いた紡糸口金から連続長繊維群密度調整装
置に至るまでの連続長繊維製造工程の内、無端金網コン
ベアの移動方向に垂直に２列設置されたスパンボンド不
織布製造装置により、２列とも連続長繊維の紡糸、連続
長繊維群密度の調整に関しては実施例１と同様の方法
で、無端金網コンベアの移動速度のみを毎分１４０ｍに
変更して目付が２６ｇ／ｍ2 のスパンボンド不織布を得
た。得られたスパンボンド不織布は実施例１と同様の方
法でＣＶ（％）値を測定したところ、４．０％であっ
た。Example 2 In the continuous filament production process from the spinneret used in Example 1 to the continuous filament group density adjusting apparatus, two spunbonds were installed vertically in the direction of movement of the endless wire mesh conveyor. In the same manner as in Example 1 for spinning continuous continuous fibers and adjusting the continuous continuous fiber group density by the non-woven fabric manufacturing apparatus, the moving speed of the endless wire mesh conveyor was changed to 140 m / min and the basis weight was 26 g. A spunbonded nonwoven fabric of / m 2 was obtained. The CV (%) value of the obtained spunbonded nonwoven fabric was 4.0% as measured by the same method as in Example 1.
【００３３】比較例１ 実施例１で用いた紡糸口金から連続長繊維群密度調整装
置に至るまでの連続長繊維製造工程の内、気流調整装置
を取り除く以外は実施例１と同様の方法で目付２６ｇ／
ｍ2 のスパンボンド不織布を得た。得られたスパンボン
ド不織布は実施例１と同様の方法でＣＶ（％）値を測定
したところ、１２．０％であった。Comparative Example 1 In the continuous continuous fiber manufacturing process from the spinneret used in Example 1 to the continuous continuous fiber group density adjusting device, the same method as in Example 1 was used except that the air flow adjusting device was removed. 26 g /
A spunbonded nonwoven fabric of m 2 was obtained. The CV (%) value of the obtained spunbonded nonwoven fabric was 12.0% as measured by the same method as in Example 1.
【００３４】比較例２ 実施例１で用いた紡糸口金から連続長繊維群密度調整装
置に至るまでの連続長繊維製造工程の内、気流調整装置
の開度調整装置のシャッターを全て全開にする以外は実
施例１と同様の方法で目付２６ｇ／ｍ2 のスパンボンド
不織布を得た。得られたスパンボンド不織布は実施例１
と同様の方法でＣＶ（％）値を測定したところ、１１．
０％であった。Comparative Example 2 In the continuous continuous fiber manufacturing process from the spinneret used in Example 1 to the continuous continuous fiber group density adjusting device, all the shutters of the opening adjusting device of the air flow adjusting device are fully opened. In the same manner as in Example 1, a spunbonded non-woven fabric having a basis weight of 26 g / m 2 was obtained. The spunbonded non-woven fabric thus obtained was used in Example 1.
When the CV (%) value was measured by the same method as described in 11.
It was 0%.
【００３５】実施例、比較例に示したように本発明の連
続長繊維群密度調整装置を備えたスパンボンド不織布製
造装置で得られた不織布はＣＶ（％）値が小さいことで
示されるように、目付斑が少なく、目付分布が均一な地
合の良い不織布となり、紡糸口金の列数が増加すると相
乗効果により更に品質が向上する。一方、連続長繊維群
密度調整装置を具備しない設備、または連続長繊維群密
度調整装置を備えていても開度調整装置のシャッターを
全て全開にし、調整を行わない場合はＣＶ（％）値が大
きいことが示すように目付斑が目立つスパンボンド不織
布しか得ることができない。As shown in Examples and Comparative Examples, the nonwoven fabrics obtained by the spunbonded nonwoven fabric manufacturing apparatus equipped with the continuous filament group density adjusting device of the present invention have a small CV (%) value, as shown by In addition, the non-woven fabric has a small basis weight and a uniform basis weight distribution, and when the number of rows of the spinneret is increased, the quality is further improved by a synergistic effect. On the other hand, if the equipment without the continuous long fiber group density adjusting device, or even if the continuous long fiber group density adjusting device is provided, all the shutters of the opening adjusting device are fully opened and no adjustment is made, the CV (%) value is Only spunbonded non-woven fabrics having noticeable mottle as shown by the large size can be obtained.
【００３６】[0036]
【発明の効果】本発明は連続長繊維より成る長繊維不織
布を得る際に、紡糸口金より熱可塑性樹脂を簾状に溶融
紡糸した連続長繊維を断面が矩型の高速気流牽引装置に
より牽引して細化延伸させ、これを無端金網コンベア上
に堆積させて不織布ウエブを得るに際し、高速気流牽引
装置の下方に変向板と気流速度調整装置を設けることに
よって、長繊維群は幅方向の繊維密度分布が均一にされ
て無端金網コンベア上に堆積される。そのため得られた
スパンボンド不織布は目付斑が少なく、目付分布が均一
で地合の優れている。INDUSTRIAL APPLICABILITY According to the present invention, when a continuous fiber non-woven fabric composed of continuous continuous fibers is obtained, continuous continuous fibers obtained by melt-spinning a thermoplastic resin in a blind shape from a spinneret are pulled by a high-speed airflow pulling device having a rectangular cross section. When a non-woven web is obtained by stacking and stretching it on an endless wire mesh conveyor, by providing a deflecting plate and an air velocity adjusting device below the high-speed air-flow traction device, the long fiber group can be made into fibers in the width direction. The density distribution is made uniform and deposited on the endless wire mesh conveyor. Therefore, the obtained spunbonded nonwoven fabric has a small basis weight, a uniform basis weight distribution, and an excellent texture.
【図１】本発明のスパンボンド不織布製造装置の一例を
示す斜視図。FIG. 1 is a perspective view showing an example of a spunbonded nonwoven fabric manufacturing apparatus of the present invention.
【図２】図１に示す装置の要部を示す側面図。FIG. 2 is a side view showing a main part of the device shown in FIG.
【図３】気流速度調節装置と変向板の拡大斜視図。FIG. 3 is an enlarged perspective view of an airflow velocity adjusting device and a deflection plate.
【図４】長繊維群と気流の流れを示す模式図。FIG. 4 is a schematic diagram showing a long fiber group and the flow of air flow.
【図５】長繊維群と気流の流れを示す模式図。FIG. 5 is a schematic diagram showing a long fiber group and the flow of air flow.
１ 紡糸口金 ２ 紡出された長繊維群 ３ 高速気流による牽引装置 ４ 変向板 ５ 気流速度調節装置 ６ 開口度調節デバイス（気流流量調節デバイス） ７ 無端コンベア ８ 長繊維ウエブ １０ 気流 1 Spinneret 2 Spinned long fiber group 3 Traction device by high-speed air flow 4 Deflection plate 5 Air flow rate control device 6 Opening degree control device (air flow rate control device) 7 Endless conveyor 8 Long fiber web 10 Air flow
Claims (1)
長繊維群を無端コンベア上にウエブ状に堆積せしめるス
パンボンド不織布の製造装置であって、 （イ）紡糸口金から簾状に溶融紡出された連続長繊維群
を高速気流にて牽引して細化延伸するための長方形断面
を有する高速気流による牽引装置、 （ロ）該高速気流による牽引装置の下方に設置され、該
高速気流による牽引装置から簾状に排出される連続長繊
維群の走行方向に対し、主要面が傾斜して設けられてい
て、該主要面に突当る連続長繊維の走行方向を転向する
ための変向板、および （ハ）連続長繊維群が該変向板に突当る位置に近接して
配置された気流速度調節装置であって、連続長繊維群の
走行に直交する方向（幅方向）に沿って複数に区分され
ており、各区分にはそれぞれ気流の流量を独立して調節
することができる流量調節デバイスが設けられていて、
該流量の調節によって連続長繊維を随伴する気流の速度
の幅方向における分布を調整することができる気流速度
調節装置を備えていることを特徴とするスパンボンド不
織布の製造装置。1. An apparatus for producing a spunbonded non-woven fabric, which comprises depositing continuous filaments melt-spun from a spinneret into a blind shape on an endless conveyor, comprising: (a) melting the spinneret into a blind shape. A high-speed air-flow traction device having a rectangular cross-section for pulling the spun continuous filaments by a high-speed air flow for thinning and stretching, (b) The high-speed air flow installed below the high-speed air flow traction device. The main surface is inclined with respect to the running direction of the continuous continuous fiber group discharged from the traction device by means of the A plate, and (c) an airflow velocity adjusting device arranged in the vicinity of a position where the continuous continuous fiber group abuts against the deflecting plate, which is along a direction (width direction) orthogonal to the running of the continuous continuous fiber group. Are divided into multiple categories, and each category has its own There is a flow control device that can adjust the flow rate of the flow independently,
An apparatus for producing a spunbonded non-woven fabric, comprising an air flow velocity adjusting device capable of adjusting the distribution of the velocity of the air flow accompanying the continuous long fibers in the width direction by adjusting the flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6013977A JPH07207564A (en) | 1994-01-11 | 1994-01-11 | Production apparatus for spun-bonded nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6013977A JPH07207564A (en) | 1994-01-11 | 1994-01-11 | Production apparatus for spun-bonded nonwoven fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07207564A true JPH07207564A (en) | 1995-08-08 |
Family
ID=11848292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6013977A Pending JPH07207564A (en) | 1994-01-11 | 1994-01-11 | Production apparatus for spun-bonded nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07207564A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1712668A1 (en) * | 2005-03-12 | 2006-10-18 | Saurer GmbH & Co. KG | Process and device for making a nonwoven web by depositing synthetic fibers |
| JP2007146356A (en) * | 2005-10-27 | 2007-06-14 | Toyobo Co Ltd | Nonwoven fabric and method for producing the same |
| EP1837429A1 (en) * | 2006-03-20 | 2007-09-26 | Oerlikon Textile GmbH & Co. KG | Process and device for making a nonwoven web by depositing synthetic fibers |
| JP2012016531A (en) * | 2010-07-09 | 2012-01-26 | Nitto Lifetech Kk | Disposable body warmer |
| CN107923095A (en) * | 2015-09-03 | 2018-04-17 | 东丽株式会社 | The manufacture method and manufacture device of spun-bonded non-woven fabrics |
-
1994
- 1994-01-11 JP JP6013977A patent/JPH07207564A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1712668A1 (en) * | 2005-03-12 | 2006-10-18 | Saurer GmbH & Co. KG | Process and device for making a nonwoven web by depositing synthetic fibers |
| US7798795B2 (en) | 2005-03-12 | 2010-09-21 | Saurer Gmbh & Co. Kg | Method and apparatus for forming a non-woven web by deposition of synthetic filaments |
| JP2007146356A (en) * | 2005-10-27 | 2007-06-14 | Toyobo Co Ltd | Nonwoven fabric and method for producing the same |
| EP1837429A1 (en) * | 2006-03-20 | 2007-09-26 | Oerlikon Textile GmbH & Co. KG | Process and device for making a nonwoven web by depositing synthetic fibers |
| JP2012016531A (en) * | 2010-07-09 | 2012-01-26 | Nitto Lifetech Kk | Disposable body warmer |
| CN107923095A (en) * | 2015-09-03 | 2018-04-17 | 东丽株式会社 | The manufacture method and manufacture device of spun-bonded non-woven fabrics |
| CN107923095B (en) * | 2015-09-03 | 2020-04-03 | 东丽株式会社 | Method and apparatus for producing spunbonded nonwoven fabric |
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