JP5093851B2 - Manufacturing method of spunlace nonwoven fabric - Google Patents
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Description
本発明は、高圧液体流を作用させるスパンレース不織布の製造方法に関する。 The present invention relates to a method for producing a spunlace nonwoven fabric in which a high-pressure liquid flow is applied.
高圧液体流を繊維ウエブに噴射して構成繊維同士を交絡させることによりスパンレース不織布を製造する方法は、広く知られ実施されている。スパンレース不織布を製造する際には、交絡処理における噴射ノズルから噴射される高圧液体流の圧力や回数、繊維ウエブを支える支持体の構成等を適宜選択することによって、得られる不織布における構成繊維同士の交絡度合い、不織布の強度、不織布に付与される開孔の有無や大きさ等を設計することができる。噴射ノズルは、同一のノズル孔が同一の孔間隔で配列されたものを使用するのが一般的であり、このような噴射ノズルを用いて得られたスパンレース不織布にも噴射流体の打撃痕が付与されることとなる。同一のノズル孔が同一の孔間隔で配列された噴射ノズルを用いるのではなく、より装飾的な模様を付与することを目的として、特許文献１では、複数の異なるノズル孔を配列させてスパンレース不織布を得ることを提案している。特許文献１によれば、大きさや形状の異なるノズル孔を同一間隔、あるいは異なる間隔で自由自在に配列させることにより多種多様の模様を不織布に付与できるというものである。
しかしながら、多種多様の模様が付与できるという記述があるものの、具体的には不織布にどのような模様が付与されるのかが明確には記述されていない。また、模様の付与手段が多種多様すぎるため、どのように組み合わせてどのような模様が付与できるかを想定するのが困難である。 However, although there is a description that a wide variety of patterns can be imparted, it is not specifically described what kind of pattern is imparted to the nonwoven fabric. In addition, since there are too many patterns providing means, it is difficult to assume how the patterns can be applied by combining them.
本発明では、模様の設計が容易で、スパンレース不織布に通常付与されてしまう打撃痕を利用して、スパンレース不織布に模様を付与する方法を提供することを課題とする。 It is an object of the present invention to provide a method for imparting a pattern to a spunlace nonwoven fabric by utilizing a striking mark that is easy to design the pattern and is usually imparted to the spunlace nonwoven fabric.
本発明者等は、スパンレース不織布に付与される打撃痕を利用して模様を付与することを検討した結果、同一のノズル孔を特定のパターンで配列させることにより、不織布表面に隆起状模様を付与できることを見出し、本発明に到達した。 As a result of studying the application of a pattern using the striking marks applied to the spunlace nonwoven fabric, the present inventors have arranged a raised pattern on the nonwoven fabric surface by arranging the same nozzle holes in a specific pattern. As a result, the present invention has been found.
すなわち、本発明は、繊維ウエブに高圧液体流を作用させて繊維ウエブを交絡させるスパンレース不織布の製造方法であって、高圧液体流を噴射する噴射ノズルとして、
噴射孔が複数配列した列を２列有し、
１列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−１）、次いで前記配列１−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔１−１）、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−２）、次いで前記配列１−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けられている（間隔１−２）ことの繰り返しによって多数の噴射孔が配列し、
２列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列２−１）、前記配列２−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔２−１）、１個の噴射孔を設けるかあるいは噴射孔が孔間隔１ｍｍ以下で２〜３個配列し（配列２−２）、次いで前記配列２−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔が設けられている（間隔２−２）ことの繰り返しによって多数の噴射孔が配列し、
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように千鳥状に配列し、
１列目に設けた間隔１−１と２列目に設けた間隔２−１、および１列目に設けた間隔１−２と２列目に設けた間隔２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離がいずれも０．８ｍｍ以上である
噴射ノズルを用いることを特徴とするスパンレース不織布の製造方法を要旨とするものである。
That is, the present invention is a method for producing a spunlace nonwoven fabric in which a fiber web is entangled by causing a high-pressure liquid flow to act on the fiber web, and as a spray nozzle for injecting a high-pressure liquid flow,
It has two rows with a plurality of injection holes arranged,
In the first column, one of the injection holes 2-3 of the injection holes are arranged in the following provided or hole spacing 1mm (SEQ 1-1), followed by one injection hole in the sequence 1-1 If it provided spaced more than 1 mm, 2 times or more the hole spacing of the holes intervals between the injection holes in the sequence 1-1 If you had by arranging the two or three injection holes in the sequence 1-1 (Interval 1-1), one injection hole is provided, or two or three injection holes are arranged with an interval of 1 mm or less (array 1-2), and then one in the array 1-2. When an injection hole is provided, an interval exceeding 1 mm is provided, and when two or three injection holes are arranged in the arrangement 1-2, the interval between the injection holes in the arrangement 1-1 is twice or more. Many injection holes are arranged by repeating the interval of the holes (interval 1-2).
In the second row, one injection hole is provided, or two to three injection holes are arranged with an interval of 1 mm or less (array 2-1), and one injection hole is provided in the array 2-1. In the case where two or three injection holes are arranged in the array 2-1, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. (Interval 2-1) One injection hole is provided or two or three injection holes are arranged with an interval of 1 mm or less (Array 2-2), and then one injection hole is arranged in the arrangement 2-2. When provided, an interval exceeding 1 mm is provided, and when two to three injection holes are arranged in the array 2-2, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. A number of injection holes are arranged by repeating (interval 2-2),
Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner so that the line connecting the centers of the shortest injection holes is at an angle of 45 degrees or less with the machine direction. And
The interval 1-1 provided in the first column, the interval 2-1 provided in the second column, the interval 1-2 provided in the first column, and the interval 2-2 provided in the second column are the machine direction Use is made of an injection nozzle that is present on both parallel lines and has a distance of 0.8 mm or more in the direction perpendicular to the machine direction in a region where both of them are on the same line parallel to the machine direction. The gist of the method is to produce a spunlace nonwoven fabric.
以下、本発明について詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明はスパンレース不織布の製造方法において用いる噴射ノズルとして、噴射孔が複数配列した列を２列有する。 The present invention has two rows in which a plurality of spray holes are arranged as spray nozzles used in the method for producing a spunlace nonwoven fabric.
１列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−１）、次いで前記配列１−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔１−１）、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−２）、次いで前記配列１−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けられている（間隔１−２）ことの繰り返しによって多数の噴射孔が配列している。すなわち、配列１−１、間隔１−１、配列１−２、間隔１−２をひとつの繰り返し単位として、噴射孔が特定の間隔にて配列している。 In the first column, one of the injection holes 2-3 of the injection holes are arranged in the following provided or hole spacing 1mm (SEQ 1-1), followed by one injection hole in the sequence 1-1 If it provided spaced more than 1 mm, 2 times or more the hole spacing of the holes intervals between the injection holes in the sequence 1-1 If you had by arranging the two or three injection holes in the sequence 1-1 (Interval 1-1), one injection hole is provided, or two or three injection holes are arranged with an interval of 1 mm or less (array 1-2), and then one in the array 1-2. When an injection hole is provided, an interval exceeding 1 mm is provided, and when two or three injection holes are arranged in the arrangement 1-2, the interval between the injection holes in the arrangement 1-1 is twice or more. Many injection holes are arranged by repeating the interval of the holes (interval 1-2). There. That is, the injection holes are arranged at specific intervals with the arrangement 1-1, the interval 1-1, the arrangement 1-2, and the interval 1-2 as one repeating unit.
２列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列２−１）、前記配列２−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔２−１）、１個の噴射孔を設けるかあるいは噴射孔が孔間隔１ｍｍ以下で２〜３個配列し（配列２−２）、次いで前記配列２−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔が設けられている（間隔２−２）ことの繰り返しによって多数の噴射孔が配列している。すなわち、配列２−１、間隔２−１、配列２−２、間隔２−２をひとつの繰り返し単位として、噴射孔が特定の間隔にて配列している。 In the second row, one injection hole is provided, or two to three injection holes are arranged with an interval of 1 mm or less (array 2-1), and one injection hole is provided in the array 2-1. In the case where two or three injection holes are arranged in the array 2-1, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. (Interval 2-1) One injection hole is provided or two or three injection holes are arranged with an interval of 1 mm or less (Array 2-2), and then one injection hole is arranged in the arrangement 2-2. When provided, an interval exceeding 1 mm is provided, and when two to three injection holes are arranged in the array 2-2, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. A large number of injection holes are arranged by repeating (interval 2-2). That is, the injection holes are arranged at specific intervals with the arrangement 2-1, the interval 2-1, the arrangement 2-2, and the interval 2-2 as one repeating unit.
噴射孔が設けられた箇所（配列１−１、１−２、２−１、２−２）に相当する繊維ウェブは、液体流が作用されるため、液体流が衝突することにより、繊維同士がより緻密に交絡したものとなる。一方、大きく孔間隔を設けた箇所（間隔１−１、１−２、２−１、２−２）に相当する繊維ウェブは、液体流の作用が非常に小さく、前記した液体流の作用が行われる箇所と比較すると、得られる不織布の表面形態が異なる。噴射孔が設けられた箇所に相当する繊維ウェブは、不織布表面が凹状となり、大きく孔間隔を設けた箇所に相当する繊維ウェブは、不織布表面が凸状となる。したがって、得られるスパンレース不織布の機械方向と平行する方向に凹状の区域と凸状の区域とが交互に存在することとなり、凸部が縞状に隆起した模様を呈することとなる。 The fiber web corresponding to the locations where the injection holes are provided (arrays 1-1, 1-2, 2-1, 2-2) is affected by the liquid flow, so that the fibers collide with each other. Is more closely entangled. On the other hand, the fiber web corresponding to the locations (intervals 1-1, 1-2, 2-1, 2-2) provided with a large hole interval has a very small action of the liquid flow, and the action of the liquid flow described above. Compared with the place where it is performed, the surface form of the resulting nonwoven fabric is different. The fiber web corresponding to the portion provided with the injection holes has a concave surface on the nonwoven fabric, and the fiber web corresponding to the portion provided with a large hole interval has a convex surface on the nonwoven fabric. Therefore, concave areas and convex areas exist alternately in a direction parallel to the machine direction of the obtained spunlace nonwoven fabric, and a pattern in which the convex portions are raised in a striped pattern is exhibited.
凹凸模様の明瞭さを考慮して、噴射孔が設けられた箇所（配列１−１、１−２、２−１、２−２）における噴射孔の数は１〜３個とする。また、噴射孔が設けない間隔１−１、１−２、２−１、２−２の箇所においてもまた、凹凸模様の明瞭さを考慮して、配列１−１の孔間隔の２倍以上の間隔を設ける。これらを満たさなければ、凹状の表面形態と凸状の表面形態との差が呈しにくく、不織布表面に本発明が目的とする隆起模様を得ることができない。なお、孔間隔とは、同一列内にある隣り合う噴射孔の中心を結ぶ線の距離をいう。また、孔間隔の下限は、特に限定しないが、噴射孔の孔径以上の間隔であればよい。 In consideration of the clarity of the concavo-convex pattern, the number of injection holes at the locations where the injection holes are provided (arrays 1-1, 1-2, 2-1, 2-2) is 1 to 3. In addition, at intervals 1-1, 1-2, 2-1, and 2-2 where no injection holes are provided, in consideration of the clarity of the uneven pattern, more than twice the interval between the holes in the array 1-1. Provide an interval of. If these conditions are not satisfied, the difference between the concave surface form and the convex surface form is hardly exhibited, and the raised pattern intended by the present invention cannot be obtained on the nonwoven fabric surface. In addition, a hole space | interval means the distance of the line which connects the center of the adjacent injection hole in the same row | line | column. Moreover, although the minimum of a hole space | interval is not specifically limited, What is necessary is just a space | interval beyond the hole diameter of an injection hole.
また、配列１−１、１−２、２−１、２−２のいずれにおいても、噴射孔が１個の場合は、配列１−１の噴射孔と配列１−２との噴射孔間隔、配列１−２の噴射孔と次の配列１−１との噴射孔間隔は、いずれも１ｍｍを超える間隔を設けることによって、凹状の表面形態と凸状の表面形態との差を呈することができる。配列２−１、２−２の噴射孔間隔も同様である。 Further, in any sequence 1-1,1-2,2-1,2-2 also, if the injection hole is one, the injection hole spacing between the injection hole and the sequence 1-2 sequence 1-1, The intervals between the injection holes of the array 1-2 and the next array 1-1 may be different from the concave surface form and the convex surface form by providing an interval exceeding 1 mm. . The same applies to the spray hole intervals of the arrays 2-1 and 2-2.
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、千鳥状に配列している。千鳥状の配列とは、一列目の噴射孔と２列目の噴射孔において、最短距離にある噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように配列していることをいう。１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士が千鳥状に配列していることによって、噴射される高圧液体流が列間で共に干渉しあい、構成繊維同士が良好に絡み合うことができ、単なる液体流の打撃痕が筋状に残るものとならずに、良好な隆起状の凹凸を形成することができる。なお、前記干渉効果を良好に奏するためには、角度の下限は１０度がよい。また、１列目と２列目において最短距離にある噴射孔から噴出される高圧液体流が互いに干渉するためには、１列目と２列目との距離は、一列目の噴射孔の中心点から二列目に配列する噴射孔の中心点を結ぶ直線に直角に下ろした距離が１．５ｍｍ以下であることが好ましい。 Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner. The staggered arrangement means that in the first row of injection holes and the second row of injection holes, the line connecting the centers of the injection holes at the shortest distance is at an angle of 45 degrees or less with the machine direction. That means. Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner, so that the injected high-pressure liquid flow interferes with each other between the rows, and the constituent fibers are good. As a result, it is possible to form good bumpy irregularities without leaving streaks of mere liquid flow strokes. In order to achieve the interference effect satisfactorily, the lower limit of the angle is preferably 10 degrees. Further, in order for the high-pressure liquid flows ejected from the injection holes at the shortest distance in the first and second rows to interfere with each other, the distance between the first and second rows is the center of the injection holes in the first row. It is preferable that a distance perpendicular to a straight line connecting the center points of the injection holes arranged in the second row from the point is 1.5 mm or less.
１列目に設けた間隔１−１と２列目の設けた間隔２−１、および１列目に設けた間隔１−２と２列目に設けた間隔２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離がいずれも０．８ｍｍ以上である。機械方向と平行する線上に、間隔１−１と間隔２−１、および間隔１−２と間隔２−２とがそれぞれある領域で存在することによって、高圧液体流の作用が施されない繊維ウェブの領域を確保することができ、両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離が０．８ｍｍ以上とすることにより、得られる不織布において隆起した凸部を良好に形成することができる。 The interval 1-1 provided in the first column, the interval 2-1 provided in the second column, the interval 1-2 provided in the first column, and the interval 2-2 provided in the second column are the machine direction Both exist on parallel lines, and the distances in the direction orthogonal to the machine direction are 0.8 mm or more in the region where both exist on the same line parallel to the machine direction. On the line parallel to the machine direction, the spacing 1-1 and the spacing 2-1 and the spacing 1-2 and the spacing 2-2 exist in a certain area, respectively, so that the fiber web not subjected to the action of the high-pressure liquid flow A region can be secured, and the distance between the direction perpendicular to the machine direction in the region where both are on the same line parallel to the machine direction is 0.8 mm or more, and the raised protrusions in the resulting nonwoven fabric are good Can be formed.
図１〜３に本発明に用いる噴射ノズルの一例を概略模式図で示す。いずれの噴射ノズルも噴射孔が複数配列した列を２列有する。 An example of the injection nozzle used for this invention to FIG. Each injection nozzle has two rows in which a plurality of injection holes are arranged.
図１の噴射ノズルは、１列目において、一定の孔間隔で２個の噴射孔が配列し（配列１−１）、次いで前記配列１−１における孔間隔の３倍の間隔を設けて（間隔１−１）、配列１−１と同じ孔間隔で２個の噴射孔が配列し（配列１−２）、次いで間隔１−１と同じ間隔が設けられている（間隔１−２）ことの繰り返しによって噴射孔が配列し、
２列目において、配列１−１と同じ孔間隔で３個の噴射孔が配列し（配列２−１）、次いで配列１−１における孔間隔の２倍の間隔を設けて（間隔２−１）、配列１−１と同じ孔間隔で３個の噴射孔が配列し（配列２−２）、次いで間隔２−１と同じ間隔が設けられている（間隔２−２）ことの繰り返しによって噴射孔が配列し、
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように千鳥状に配列し、
間隔１−１と間隔２−１、および間隔１−２と２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離が０．８ｍｍ以上である。
The injection nozzle of FIG. 1 has two injection holes arranged at a fixed hole interval in the first row (array 1-1), and then provided an interval three times the hole interval in the array 1-1 ( The interval 1-1), two injection holes are arranged at the same hole interval as the arrangement 1-1 (array 1-2), and then the same interval as the interval 1-1 is provided (interval 1-2). The injection holes are arranged by repeating
In the second row, three injection holes are arranged at the same hole interval as in the array 1-1 (array 2-1), and then an interval twice the hole interval in the array 1-1 is provided (interval 2-1). ), Three injection holes are arranged at the same hole interval as the arrangement 1-1 (arrangement 2-2), and then the same interval as the interval 2-1 is provided (interval 2-2). The holes arranged,
Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner so that the line connecting the centers of the shortest injection holes is at an angle of 45 degrees or less with the machine direction. And
The intervals 1-1 and 2-1 and the intervals 1-2 and 2-2 are all present on a line parallel to the machine direction, and the machines in the region where both exist on the same line parallel to the machine direction. The distance between the direction perpendicular to the direction is 0.8 mm or more.
図２の噴射ノズルは、１列目において、一定の孔間隔で２個の噴射孔が配列し（配列１−１）、次いで前記配列１−１における孔間隔の３倍の間隔を設けて（間隔１−１）、１個の噴射孔が配列し（配列１−２）、次いで間隔１−１と同じ間隔が設けられている（間隔１−２）ことの繰り返しによって噴射孔が配列し、
２列目において、１個の噴射孔が配列し（配列２−１）、次いで配列１−１における孔間隔の３倍の間隔を設けて（間隔２−１）、配列１−１と同じ孔間隔で２個の噴射孔が配列し（配列２−２）、次いで間隔２−１と同じ間隔が設けられている（間隔２−２）ことの繰り返しによって噴射孔が配列し、
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように千鳥状に配列し、
間隔１−１と間隔２−１、および間隔１−２と２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離が０．８ｍｍ以上である。
In the injection nozzle of FIG. 2, in the first row, two injection holes are arranged at a constant hole interval (array 1-1), and then an interval three times the hole interval in the array 1-1 is provided ( Interval 1-1) An injection hole is arranged by repeating that one injection hole is arranged (Array 1-2), and then the same interval as the interval 1-1 is provided (Interval 1-2).
In the second row, one injection hole is arranged (array 2-1), and then the same hole as that of array 1-1 is provided with an interval three times the hole interval in array 1-1 (interval 2-1). Two injection holes are arranged at intervals (array 2-2), and then the injection holes are arranged by repeating the same interval as interval 2-1 (interval 2-2),
Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner so that the line connecting the centers of the shortest injection holes is at an angle of 45 degrees or less with the machine direction. And
The intervals 1-1 and 2-1 and the intervals 1-2 and 2-2 are all present on a line parallel to the machine direction, and the machines in the region where both exist on the same line parallel to the machine direction. The distance between the direction perpendicular to the direction is 0.8 mm or more.
図３の噴射ノズルは、１列目において、１個の噴射孔が配列し（配列１−１）、次いで１ｍｍを超える孔間隔を設けて（間隔１−１）、１個の噴射孔が配列し（配列１−２）、次いで間隔１−１の１．３３倍の孔間隔が設けられている（間隔１−２）ことの繰り返しによって噴射孔が配列し、
２列目において、１個の噴射孔が配列し（配列２−１）、次いで間隔１−２と同じ間隔を設けて（間隔２−１）、１個の噴射孔が配列し（配列２−２）、次いで間隔１−１と同じ間隔が設けられている（間隔２−２）ことの繰り返しによって噴射孔が配列し、
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように千鳥状に配列し、
間隔１−１と間隔２−１、および間隔１−２と２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離が０．８ｍｍ以上である。
In the injection nozzle of FIG. 3, one injection hole is arranged in the first row (array 1-1), and then a hole interval exceeding 1 mm is provided (interval 1-1), and one injection hole is arranged. (Array 1-2), and then the injection holes are arranged by repeating that the hole interval 1.33 times the interval 1-1 is provided (interval 1-2),
In the second row, one injection hole is arranged (arrangement 2-1), then the same interval as the interval 1-2 is provided (interval 2-1), and one injection hole is arranged (arrangement 2- 2) Next, the injection holes are arranged by repeating the same interval as the interval 1-1 (interval 2-2),
Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner so that the line connecting the centers of the shortest injection holes is at an angle of 45 degrees or less with the machine direction. And
The intervals 1-1 and 2-1 and the intervals 1-2 and 2-2 are all present on a line parallel to the machine direction, and the machines in the region where both exist on the same line parallel to the machine direction. The distance between the direction perpendicular to the direction is 0.8 mm or more.
本発明における特定の間隔等で配置させた噴射孔は、例えば、噴射孔が一定間隔で２列配列してなる噴射ノズルを用いて、上記した特定の間隔で噴射孔が配列するように一部の噴射孔を塞ぐことによっても、容易に得ることができる。 The injection holes arranged at specific intervals or the like in the present invention are partly arranged so that the injection holes are arranged at the specific intervals described above using, for example, injection nozzles in which the injection holes are arranged in two rows at a constant interval. It can also be easily obtained by closing the injection hole.
本発明で用いられる噴射孔の孔径は特に限定されず、０．０５〜０．２ｍｍ程度がよい。また、高圧液体流の水圧は適宜選択すればよいが、噴射圧力は５〜５０ＭＰａ程度がよい。噴射圧力が５ＭＰａ未満で低すぎると、噴射孔より噴出する高圧液体流の作用が低下するため、本発明が目的とする不織布表面への凹凸形状が付与しにくくなり、また、繊維相互間の交絡が十分でなくなるため、得られる不織布は、実用的な引張強力を保持せず、良好な形態安定性を保てない傾向となる。一方、噴射圧力が５０ＭＰａを超えて高すぎると、繊維ウェブへのダメージが強くなり、素材によっては、繊維が切断されることもある。 The hole diameter of the injection hole used by this invention is not specifically limited, About 0.05-0.2 mm is good. Further, the water pressure of the high-pressure liquid flow may be appropriately selected, but the injection pressure is preferably about 5 to 50 MPa. If the spray pressure is less than 5 MPa and too low, the action of the high-pressure liquid flow ejected from the spray holes is reduced, so that it becomes difficult to give the uneven shape to the nonwoven fabric surface intended by the present invention, and entanglement between the fibers Therefore, the obtained nonwoven fabric does not have a practical tensile strength and tends not to have good shape stability. On the other hand, if the injection pressure exceeds 50 MPa and is too high, the fiber web is strongly damaged, and the fiber may be cut depending on the material.
高圧液体流の処理は、繊維ウェブに対して１回または複数回施してもよい。本発明における特定の間隔等で配置された噴射孔を有する噴射ノズルは、高圧液体流を作用させる際に不織布表面への凹凸模様を付与するものであるが、繊維ウェブへの高圧液体流の処理を数段階に分けて、仕上げである最終工程で上記噴射ノズルを用いて高圧液体流を作用させることによって、不織布表面に鮮明な凹凸模様を付与することができるので好ましい。 The treatment of the high pressure liquid stream may be applied to the fibrous web one or more times. The injection nozzle having the injection holes arranged at specific intervals or the like in the present invention gives a concavo-convex pattern to the surface of the nonwoven fabric when the high-pressure liquid flow is applied, but the high-pressure liquid flow to the fiber web is treated. Is divided into several stages, and a high-pressure liquid flow is allowed to act on the surface of the nonwoven fabric by using the above-mentioned injection nozzle in the final process, which is a finish, and thus it is preferable because a clear uneven pattern can be imparted to the nonwoven fabric surface.
高圧液体流処理の際には、繊維ウエブを孔開き支持体に載置する。孔開き支持体は、噴射される高圧液体流を排出しうる孔を多数備えるものであり、具体的には粗目織物が用いられる。粗目織物としては、経糸および緯糸として金属線や太繊度の合成樹脂製モノフィラメント等が平織組織または綾織組織等の任意の織組織で製織されたものが挙げられる。用いる粗目織物の目の大きさは任意であるが、５０〜１００メッシュ程度の目開きを持つものが好ましい。メッシュの目開きが５０未満であると、メッシュ形状に応じた模様が不織布に付与されることとなり、噴射ノズルの配置に応じた模様と相まって、噴射孔の配置に応じた模様の鮮明さに欠ける傾向となるためである。このような理由から８０〜１００メッシュの目開きを有する粗目織物を用いることが好ましい。 During the high-pressure liquid flow treatment, the fiber web is placed on the perforated support. The perforated support is provided with a large number of holes capable of discharging a jetted high-pressure liquid flow, and specifically, a coarse woven fabric is used. Examples of the coarse woven fabric include those obtained by weaving metal wires or monofilaments made of synthetic resin having a high fineness as warps and wefts with an arbitrary woven structure such as a plain weave structure or a twill structure. The size of the coarse woven fabric used is arbitrary, but those having an opening of about 50 to 100 mesh are preferred. When the mesh opening is less than 50, a pattern according to the mesh shape is imparted to the nonwoven fabric, and the pattern according to the arrangement of the injection holes is lacking in combination with the pattern according to the arrangement of the injection nozzles. This is because it becomes a trend. For this reason, it is preferable to use a coarse woven fabric having an opening of 80 to 100 mesh.
本発明において、高圧液体流を作用する繊維ウェブを構成する繊維は特にされず、木綿繊維、レーヨン繊維、リヨセル繊維等のセルロース系繊維、ポリオレフィン、ポリアミド、ポリエステル、ポリアクリロニトリル、ビニロン等の合成繊維が挙げられる。合成繊維にとしては、複数の重合体が組み合わされた複合繊維を使用してもよい。複合繊維としては、芯鞘型、サイドバイサイド型、割繊型等が挙げられる。繊維断面としては、円形断面に限らず、偏平断面、三角断面、Ｗ型断面、十字断面、多葉断面等の異形断面を有する繊維が挙げられる。異形断面繊維は、断面形状が有する突起部分で、拭き取り対象物を掻き取る働きを担うため、本発明で得られた不織布を拭き布として用いる際に好ましい。異形断面の中でも、偏平断面を採用すると繊維同士が絡みやすく、不織布表面に明瞭に凹凸模様を形成するためには効果的である。 In the present invention, fibers constituting the fiber web that acts on the high-pressure liquid flow are not particularly limited, and cellulose fibers such as cotton fibers, rayon fibers, and lyocell fibers, and synthetic fibers such as polyolefin, polyamide, polyester, polyacrylonitrile, and vinylon are used. Can be mentioned. As the synthetic fiber, a composite fiber in which a plurality of polymers are combined may be used. Examples of the composite fiber include a core-sheath type, a side-by-side type, and a split fiber type. Examples of the fiber cross section include not only a circular cross section but also a fiber having an irregular cross section such as a flat cross section, a triangular cross section, a W-shaped cross section, a cross section, and a multileaf cross section. The irregular cross-section fiber is a projecting portion of the cross-sectional shape and serves to scrape off the object to be wiped, so that it is preferable when the nonwoven fabric obtained in the present invention is used as a wiping cloth. Among the irregular cross-sections, when a flat cross-section is employed, the fibers are easily entangled, which is effective for clearly forming an uneven pattern on the nonwoven fabric surface.
本発明に用いられる繊維ウェブの目付は、特に限定されないが４０〜２００ｇ／ｍ2程度が好ましく、より好ましくは６０〜１５０ｇ／ｍ2である。 Although the fabric weight of the fiber web used for this invention is not specifically limited, About 40-200 g / m < 2 > is preferable, More preferably, it is 60-150 g / m < 2 >.
本発明では、上記した噴射ノズルを用いて、繊維ウェブに高圧液体流を作用させることによって、模様が付与されたスパンレース不織布を得る。本発明において、上記した噴射ノズルを幅方向すべてに有するものであっても、幅方向の一部に有するものであってもよい。幅方向の一部に上記噴射ノズルを用いて、繊維ウェブに高圧液体流を作用させることにより、幅方向の一部分のみに特定の模様を形成することができる。 In the present invention, a spunlace nonwoven fabric provided with a pattern is obtained by applying a high-pressure liquid flow to the fiber web using the above-described injection nozzle. In this invention, even if it has the above-mentioned injection nozzle in all the width directions, it may have in a part of width direction. A specific pattern can be formed only in a part in the width direction by applying the high-pressure liquid flow to the fiber web using the spray nozzle in a part in the width direction.
本発明によって得られたスパンレース不織布は、噴射孔の位置に対応した繊維相互の交絡形態を呈することとなる。スパンレース不織布の横断面を観察すると、特定間隔で、より多くの繊維が集積して隆起した凸部と、繊維の集積の少ない凹部とが観察されるものとなる。なお、より多くの繊維が集積して隆起した凸部は、孔間隔を大きく設けた箇所に対応する部分であり、繊維の集積の少ない凹部は、孔間隔１ｍｍ以下で噴射孔が配列している箇所に対応する部分である。したがって、得られるスパンレース不織布の機械方向と平行する方向に凹状の区域と凸状の区域とが交互に存在することとなり、縞状に隆起した模様を呈する。 The spunlace nonwoven fabric obtained by the present invention will exhibit an interlaced form of fibers corresponding to the positions of the injection holes. When the cross section of the spunlace nonwoven fabric is observed, convex portions where more fibers are accumulated and raised at a specific interval and concave portions where the fibers are less accumulated are observed. In addition, the convex part which accumulated and raised more fibers is a part corresponding to the part which provided the hole space | interval large, and the recessed part with little fiber accumulation | aggregation has the injection hole arranged with the hole space | interval of 1 mm or less. This is the part corresponding to the location. Therefore, concave areas and convex areas are alternately present in a direction parallel to the machine direction of the obtained spunlace nonwoven fabric, and a striped pattern is exhibited.
得られたスパンレース不織布は、スパンレース不織布が適用できる分野に良好に使用することができ、例えば、拭き布として適用すると、拭き取った異物を凹部に溜めることができ、優れた拭き取り性を発揮することができる。 The obtained spunlace nonwoven fabric can be used satisfactorily in fields where the spunlace nonwoven fabric can be applied. For example, when applied as a wipe, the wiped foreign matter can be accumulated in the recesses and exhibits excellent wiping properties. be able to.
本発明によると、スパンレース不織布を製造するにあたり、噴射孔の配置と孔間隔とを特定することによって、不織布表面に良好な隆起状の凹凸を付与することができる。 According to the present invention, when producing a spunlace nonwoven fabric, it is possible to impart good raised irregularities to the nonwoven fabric surface by specifying the arrangement of the injection holes and the hole spacing.
以下に本発明を実施例に基づき具体的に説明するが、本発明はこれら実施例にのみ限定されるものではない。なお、以下の実施例、比較例で示す諸特性は、以下の方法により測定した。
（１）目付（ｇ／ｍ2）：ＪＩＳ Ｌ １９０６
EXAMPLES The present invention will be specifically described below based on examples, but the present invention is not limited only to these examples. Various characteristics shown in the following examples and comparative examples were measured by the following methods.
(1) Weight per unit area (g / m 2 ): JIS L 1906
（２）引張強力（Ｎ／５ｃｍ）および伸度（％）：ＪＩＳ Ｌ １９０６に準じて測定した。長さが１５ｃｍ、巾が５ｃｍの試料片を、不織布のタテ方向およびヨコ方向について各５点採取し、定速伸張型引張試験機（オリエンテック社製 テンシロン ＵＴＭ−４−１００）を用いて、つかみ間隔１０ｃｍ、引張速度１０ｃｍ／分で伸張し、最大加重時の強さを測定し、その平均値を引張強力とした。また、最大荷重時の伸びを測定し、その平均値より伸度を求めた。 (2) Tensile strength (N / 5 cm) and elongation (%): Measured according to JIS L 1906. Sample pieces having a length of 15 cm and a width of 5 cm were sampled for each of the vertical direction and the horizontal direction of the nonwoven fabric, and using a constant speed extension type tensile tester (Tensilon UTM-4-100 manufactured by Orientec Co., Ltd.) Stretching was performed at a grip interval of 10 cm and a tensile speed of 10 cm / min, and the strength at the maximum load was measured. Moreover, the elongation at the maximum load was measured, and the elongation was obtained from the average value.
（３）拭き取り性： 試料（１５０ｍｍ×１９０ｍｍ）を用意し、試料にその質量の２４０％の水を付与して、試料に付与された模様の面（縞状の凹凸面）が外側となるように二つ折りにした。一方、ポリ塩化ビニル製の板の上に、水性絵具０．５ｇを載せてこれを１０円玉の大きさに広げたものを被拭き取り材料として準備した。二つ折りにした試料を、水性絵具上に載せて、試料の上に荷重１００ｇを載せた。次いで、試料に付与された縞状の模様の長手方向と略直行する方向に５ｃｍの距離を２秒の速度で引っ張った後、ポリ塩化ビニル製の板上に残存した水性絵具の量を測定し、下記式により拭き取り性（除去率）を求めた。
拭き取り性（除去率）＝［（０．５−（残存した水性絵具の量））／０．５］×１００
(3) Wiping property: A sample (150 mm × 190 mm) is prepared, 240% of the mass of water is applied to the sample, and the pattern surface (striped uneven surface) applied to the sample is on the outside. Folded in half. On the other hand, an aqueous paint 0.5 g placed on a polyvinyl chloride plate and expanded to a 10-yen coin size was prepared as a material to be wiped. The sample folded in half was placed on an aqueous paint and a load of 100 g was placed on the sample. Next, after pulling a distance of 5 cm at a speed of 2 seconds in a direction substantially perpendicular to the longitudinal direction of the striped pattern applied to the sample, the amount of the aqueous paint remaining on the polyvinyl chloride plate was measured. The wiping property (removal rate) was determined by the following formula.
Wiping property (removal rate) = [(0.5− (amount of remaining aqueous paint)) / 0.5] × 100
実施例１
平均繊維長２５ｍｍのコットン晒綿と、偏平断面のポリエステル繊維（日本エステル株式会社製＜Ｆ３３０＞、単糸繊度１．７デシテックス、繊維長５１ｍ ｍ ）を用意し、コットン晒綿：ポリエステル繊維＝７０：３０（質量比）の割合で混率してランダムカード機により４０ ｇ／ｍ2の繊維ウェブを得た。
Example 1
Cotton bleached cotton with an average fiber length of 25 mm and polyester fibers with a flat cross section (Nippon Ester Co., Ltd. <F330>, single yarn fineness 1.7 decitex, fiber length 51 mm) are prepared. Cotton bleached cotton: polyester fiber = 70 : The mixing ratio was 30 (mass ratio), and a fiber web of 40 g / m 2 was obtained with a random card machine.
得られた繊維ウエブを移動する１００メッシュの金属製粗目織物上に載置し、図３に示すごとき噴射ノズルプレートを用いて高圧液体流を作用させた。用いた噴射ノズルプレートは、噴射孔の孔径０．１４ｍｍ、配列１−１と１−２の噴射孔間の孔間隔を１．５ｍｍ（間隔１−１）、配列１−２と配列１−１の噴射孔間の孔間隔を２．０ｍｍ（間隔１−２）、配列２−１と２−２の噴射孔間の孔間隔を２．０ｍｍ（間隔２−１）、配列２−２と２−１の噴射孔間の孔間隔を１．５ｍｍ（間隔２−２）、１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４０度の角度で千鳥配列したものであり、間隔１−１と間隔２−１および間隔１−２と間隔２−２とが機械方向と平行する同一線上に存在する区域における機械方向と直行する方向の距離は１．３６ｍｍであった。高圧液体流処理条件としては、繊維ウェブの上方５０ｍｍの位置より、噴射圧２．８ＭＰａの高圧液体流により孔間隔０．５ｍｍで噴射孔が配列した噴射ノズルプレートを用いて予備交絡を施した。次いで、噴射圧５．６ＭＰａの高圧液体流により図３に示すごとき本発明の噴射ノズルプレートを用いて交絡処理を施した。交絡処理後余剰の水分を公知の水分除去装置であるマングルにより除去し、サクションバンド方式の乾燥機を用い１２０℃で乾燥処理を行い、スパンレース不織布を得た。得られたスパンレース不織布の表面には、良好に隆起した縞状の凹凸を付与されていた。また、この不織布の物性は、引張強力がタテ方向が７７Ｎ／５ｃｍ、ヨコ方向が９Ｎ／５ｃｍ、伸度がタテ方向が４２％、ヨコ方向が１２５％、拭き取り性５５％で拭き取り性が良好であった。 The obtained fiber web was placed on a moving metal mesh of 100 mesh, and a high pressure liquid flow was applied using an injection nozzle plate as shown in FIG. The injection nozzle plate used has a hole diameter of 0.14 mm, a hole interval between the injection holes of the arrays 1-1 and 1-2 is 1.5 mm (interval 1-1), and the arrays 1-2 and 1-1. The hole interval between the injection holes of 2.0 mm (interval 1-2), the hole interval between the injection holes of arrays 2-1 and 2-2 is 2.0 mm (interval 2-1), and arrays 2-2 and 2 -1 is 1.5 mm (interval 2-2), and the adjacent injection holes of the first row of injection holes and the second row of injection holes are the centers of the shortest distance injection holes. Are connected in a staggered manner at an angle of 40 degrees with the machine direction, and the intervals 1-1 and 2-1, and the intervals 1-2 and 2-2 exist on the same line parallel to the machine direction. The distance between the machine direction and the direction perpendicular to the area was 1.36 mm. As high-pressure liquid flow treatment conditions, pre-entanglement was performed from a position 50 mm above the fiber web by using an injection nozzle plate in which injection holes are arranged at a hole interval of 0.5 mm by a high-pressure liquid flow with an injection pressure of 2.8 MPa. Subsequently, the entanglement process was performed using the injection nozzle plate of the present invention as shown in FIG. 3 by a high-pressure liquid flow having an injection pressure of 5.6 MPa. Excess water after the entanglement treatment was removed with a mangle, which is a known moisture removing device, and dried at 120 ° C. using a suction band type dryer to obtain a spunlace nonwoven fabric. The surface of the obtained spunlace nonwoven fabric was provided with well-protruded striped irregularities. The nonwoven fabric has good wiping properties with a tensile strength of 77N / 5cm in the vertical direction, 9N / 5cm in the horizontal direction, 42% in the vertical direction, 125% in the horizontal direction, and 55% wiping property. there were.
実施例２
実施例１において、図２に示すごとき噴射ノズルプレートを用いたこと以外は、実施例１と同様にして高圧液体流を施した。用いた噴射ノズルプレートは、孔径０．１４ｍｍの噴射孔を用い、１列目においては、孔間隔０．５ｍｍで２個の噴射孔が配列し（配列１−１）、次いで配列１−１における孔間隔の３倍（１．５ｍｍ）の孔間隔を設けて（間隔１−１）、１個の噴射孔を配列させ（配列１−２）、次いで間隔１−１と同じ孔間隔を設けて（間隔１−２）、次の配列１−１の噴射孔を配列させ、２列目においては、１個の噴射孔を配列させ（配列２−１）、次いで間隔１−１と同じ孔間隔を設けて（間隔２−１）、孔間隔０．５ｍｍで２個の噴射孔が配列し（配列２−２）、次いで間隔１−１と同じ孔間隔を設けている。１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４０度の角度で千鳥配列したものであり、間隔１−１と間隔２−１および間隔１−２と間隔２−２とが機械方向と平行する同一線上に存在する区域における機械方向と直行する方向の距離は０．９３ｍｍであった。
Example 2
In Example 1, a high-pressure liquid flow was applied in the same manner as in Example 1 except that an injection nozzle plate as shown in FIG. 2 was used. The used injection nozzle plate uses injection holes with a hole diameter of 0.14 mm, and in the first row, two injection holes are arranged with a hole interval of 0.5 mm (array 1-1), and then in array 1-1. A hole interval that is three times the hole interval (1.5 mm) is provided (interval 1-1), one injection hole is arranged (array 1-2), and then the same hole interval as the interval 1-1 is provided. (Interval 1-2), the injection holes of the next array 1-1 are arranged, and in the second row, one injection hole is arranged (Array 2-1), and then the same hole interval as the interval 1-1 (Interval 2-1), two injection holes are arranged at an interval of 0.5 mm (array 2-2), and then the same hole interval as the interval 1-1 is provided. Adjacent injection holes of the first row of injection holes and the second row of injection holes are formed by staggering a line connecting the centers of the shortest injection holes at an angle of 40 degrees with the machine direction. The distance in the direction orthogonal to the machine direction in the area where 1-1 and the distance 2-1 and the distance 1-2 and the distance 2-2 exist on the same line parallel to the machine direction was 0.93 mm.
得られたスパンレース不織布の表面には、良好に隆起した縞状の凹凸を付与されていた。また、この不織布の物性は、引張強力がタテ方向が７８Ｎ／５ｃｍ、ヨコ方向が１４Ｎ／５ｃｍ、伸度がタテ方向が４７％、ヨコ方向が１１５％、拭き取り性６３％で拭き取り性が良好であった。 The surface of the obtained spunlace nonwoven fabric was provided with well-protruded striped irregularities. The nonwoven fabric has good wiping properties with a tensile strength of 78N / 5cm in the vertical direction, 14N / 5cm in the horizontal direction, 47% in the vertical direction, 115% in the horizontal direction, and 63% wipeability. there were.
Claims (2)
噴射孔が複数配列した列を２列有し、
１列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−１）、次いで前記配列１−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔１−１）、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列１−２）、次いで前記配列１−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列１−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けられている（間隔１−２）ことの繰り返しによって多数の噴射孔が配列し、
２列目においては、１個の噴射孔を設けるかあるいは孔間隔１ｍｍ以下で２〜３個の噴射孔が配列し（配列２−１）、前記配列２−１において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−１において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔を設けて（間隔２−１）、１個の噴射孔を設けるかあるいは噴射孔が孔間隔１ｍｍ以下で２〜３個配列し（配列２−２）、次いで前記配列２−２において１個の噴射孔を設けた場合は１ｍｍを超える間隔を設け、前記配列２−２において２〜３個の噴射孔を配列させた場合は配列１−１における噴射孔間の孔間隔の２倍以上の孔間隔が設けられている（間隔２−２）ことの繰り返しによって多数の噴射孔が配列し、
１列目の噴射孔と２列目の噴射孔との隣り合う噴射孔同士は、最短距離の噴射孔同士の中心を結ぶ線が機械方向と４５度以内の角度となるように千鳥状に配列し、
１列目に設けた間隔１−１と２列目に設けた間隔２−１、および１列目に設けた間隔１−２と２列目に設けた間隔２−２とは、機械方向と平行する線上にいずれも存在し、それぞれ両者が機械方向と平行する同一線上に存在する領域における機械方向と直行する方向の距離がいずれも０．８ｍｍ以上である
噴射ノズルを用いることを特徴とするスパンレース不織布の製造方法。 A spunlace nonwoven fabric manufacturing method in which a high-pressure liquid flow is caused to act on a fiber web and the fiber web is entangled, as an injection nozzle for injecting a high-pressure liquid flow,
It has two rows with a plurality of injection holes arranged,
In the first column, one of the injection holes 2-3 of the injection holes are arranged in the following provided or hole spacing 1mm (SEQ 1-1), followed by one injection hole in the sequence 1-1 If it provided spaced more than 1 mm, 2 times or more the hole spacing of the holes intervals between the injection holes in the sequence 1-1 If you had by arranging the two or three injection holes in the sequence 1-1 (Interval 1-1), one injection hole is provided, or two or three injection holes are arranged with an interval of 1 mm or less (array 1-2), and then one in the array 1-2. When an injection hole is provided, an interval exceeding 1 mm is provided, and when two or three injection holes are arranged in the arrangement 1-2, the interval between the injection holes in the arrangement 1-1 is twice or more. Many injection holes are arranged by repeating the interval of the holes (interval 1-2).
In the second row, one injection hole is provided, or two to three injection holes are arranged with an interval of 1 mm or less (array 2-1), and one injection hole is provided in the array 2-1. In the case where two or three injection holes are arranged in the array 2-1, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. (Interval 2-1) One injection hole is provided or two or three injection holes are arranged with an interval of 1 mm or less (Array 2-2), and then one injection hole is arranged in the arrangement 2-2. When provided, an interval exceeding 1 mm is provided, and when two to three injection holes are arranged in the array 2-2, a hole interval more than twice the hole interval between the injection holes in the array 1-1 is provided. A number of injection holes are arranged by repeating (interval 2-2),
Adjacent injection holes of the first row of injection holes and the second row of injection holes are arranged in a staggered manner so that the line connecting the centers of the shortest injection holes is at an angle of 45 degrees or less with the machine direction. And
The interval 1-1 provided in the first column, the interval 2-1 provided in the second column, the interval 1-2 provided in the first column, and the interval 2-2 provided in the second column are the machine direction Use is made of an injection nozzle that is present on both parallel lines and has a distance of 0.8 mm or more in the direction perpendicular to the machine direction in a region where both of them are on the same line parallel to the machine direction. A method for producing spunlace nonwoven fabric.
A spunlace nonwoven fabric obtained by the method for producing a spunlace nonwoven fabric according to claim 1.
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