JP6105867B2 - Nonwoven fabric and method for producing the same - Google Patents

Description

  The present invention relates to a nonwoven fabric and a method for producing the same.

Absorbent articles such as sanitary napkins, panty liners, disposable diapers, etc., depending on its function, those with a protruding part on one side of the sheet material, those with a protruding part, and many Products with small holes have been developed.
In Patent Document 1, in an uneven or undulating sheet material, convex portions and open concave portions are dispersed throughout, and the fiber aggregate density of the concave portions is more than the fiber aggregate density of the convex portions. Low ones are disclosed. Thereby, it is said that the leakage of the high-viscosity body fluid is surely suppressed or prevented, and also has other necessary characteristics, and has excellent performance as a surface material of the absorbent article. .

  Patent Document 2 discloses a multilayer nonwoven fabric in which one side of a sheet material is a protruding portion extending in a streak shape, and the cross section thereof is shaped like a kamaboko (substantially semicircle). The groove part in this nonwoven fabric is formed so that the basis weight is the lowest in the nonwoven fabric, the content of the horizontally oriented fibers is high, and the content of the vertically oriented fibers is low. And the side part of a convex-shaped part has the highest fabric weight in a nonwoven fabric, and the content rate of a longitudinally-oriented fiber is high. As a result, it becomes easy to allow a predetermined liquid such as excrement to pass through, and since the liquid falls into the groove portion, the diffusion area is small (spot property), the contact area with the skin is small (good tactile property), and the liquid return is suppressed. The Therefore, it is difficult for the liquid to remain on the sheet surface (low persistence), and it is possible to prevent the liquid from adhering widely to the skin for a long time.

Japanese Patent Laid-Open No. 03-137258 JP 2008-025081 A

However, in the non-woven fabric disclosed in Patent Document 1, FIG. 1 described in Patent Document 1 shows a state in which fibers around the aperture are annularly oriented. For this reason, since the liquid excreted on the sheet surface tends to remain, the low residual property may be insufficient.
Moreover, in the nonwoven fabric disclosed by patent document 2, since the fiber density of a convex-shaped part is higher than a groove part, the low residual property of the liquid excreted on the sheet | seat surface is inadequate.
An object of the present invention is to provide a nonwoven fabric that suppresses the spread of liquid and has good excretion collecting ability.

In the present invention, the waveform protrusions that continuously protrude in the waveform and form the waveform in plan view are arranged in parallel on the first surface side of the nonwoven fabric in plan view, and the waveform phase of the adjacent one of the waveform protrusions and the other The corrugated phase of the corrugated protrusion has an opposite phase, the corrugated protrusions adjacent to each other have a region separated from each other and a region widely separated from the region, the first surface side in the widely separated region Provides a non-woven fabric having a second surface side protruding portion protruding to the opposite second surface side and continuing to the corrugated protruding portion.
The present invention conveys a web of fibers containing thermoplastic fibers onto a support having a plurality of protrusions and a plurality of holes, and blows hot air along the web so that the web is uneven. The base material, the plurality of protrusions arranged on the first surface side of the base portion in a plan view, and the base portion of the base portion. The plurality of holes communicating from the first surface side to the second surface side opposite to the first surface side, and the protrusions and the holes are arranged in a first direction and a second direction orthogonal to each other on the first surface side plane. The projections have a first surface and a second surface that are opposed to each other, and the first surface and the second surface are disposed in a direction perpendicular to the conveyance direction of the web. A method for producing a nonwoven fabric is provided.

In the nonwoven fabric of the present invention, the spread of the liquid on the first surface side is suppressed by the corrugated protrusion, and excretion such as loose stool is good due to the interaction between the corrugated protrusion and the second surface side protrusion. Moreover, since the 1st surface side of a waveform protrusion part protrudes continuously in a waveform, since the contact area with skin becomes small by this protrusion part, air permeability improves and the touch improves. Thereby, the nonwoven fabric which enables comfortable continuous wear can be provided.
In the method for producing a nonwoven fabric of the present invention, the first surface and the second surface of the protrusions of the support are arranged in a direction orthogonal to the web conveyance direction, so that the waveform is formed on the first surface side of the nonwoven fabric in plan view. Waveform projections that project continuously and form a waveform in plan view are arranged in parallel, and are applied to a nonwoven fabric in which the waveform phase of one of the adjacent waveform projections and the waveform phase of the other waveform projection are opposite in phase. Can be shaped. Thereby, the nonwoven fabric from which the effect similar to that obtained with the nonwoven fabric of this invention mentioned above is acquired can be manufactured.

It is the fragmentary sectional perspective view which showed typically one preferable embodiment of the nonwoven fabric which concerns on this invention. It is the top view which showed typically the example of arrangement | positioning in the nonwoven fabric of 1st Embodiment. FIG. 3 is a cross-sectional view taken along line A-A ′ in FIG. 2. FIG. 3 is a cross-sectional view taken along line B-B ′ in FIG. 2. FIG. 3 is a cross-sectional view taken along the line C-C ′ along the corrugated protrusion through the first protrusion in FIG. 2. It is the fragmentary sectional view which showed typically an example of the manufacturing method of the nonwoven fabric which concerns on this invention. It is the perspective view which showed a preferable example of the support body used for the manufacturing method of the nonwoven fabric which concerns on this invention. It is a top view explaining the effect | action of the processus | protrusion and hole of a support body at the time of shaping | molding, the support body was shown as the continuous line, and the web shape | molded with the dashed-two dotted line was shown. It is the top view which showed typically the example of arrangement | positioning in the nonwoven fabric of 1st Embodiment by planarly viewing from the 2nd surface side. It is the perspective view which showed a preferable example of the absorbent article which applied the nonwoven fabric of this invention to the surface sheet. It is the measurement schematic which showed typically the evaluation method of the amount of loose stool adhesion and a stool diffusion area.

A preferred embodiment of the nonwoven fabric according to the present invention will be described below with reference to FIGS.
The nonwoven fabric 10 of the present invention is preferably applied to a surface sheet of an absorbent article such as a sanitary napkin or a disposable diaper. The first surface side Z1 is used with the skin surface side of the wearer, and the second surface side Z2 is used. Is preferably arranged and used on the absorber (not shown) side inside the article. Hereinafter, although it demonstrates considering the embodiment which uses the 1st surface side Z1 of the nonwoven fabric 10 shown in drawing toward a wearer's skin surface, this invention is limited to this and is not interpreted.

  As shown in FIGS. 1 to 5, in the nonwoven fabric 10, a corrugated protrusion 11 having a planar wave shape that protrudes continuously from the corrugated shape is arranged in parallel on the first surface side Z <b> 1 on the side of the sheet-like nonwoven fabric in plan view. It is arranged. Of the adjacent corrugated protrusions 11, the corrugated phase of one corrugated protrusion 11 (11A) and the corrugated phase of the other corrugated protrusion 11 (11B) are opposite in phase. Therefore, regions where the corrugated protrusions 11A and the corrugated protrusions 11B are separated from each other (narrowly spaced regions) and regions wider than the regions appear alternately. Moreover, the adjacent waveform protrusion part 11A and the waveform protrusion part 11B are line symmetrical figures. Furthermore, the corrugated protrusion 11A and the corrugated protrusion 11A next adjacent via the adjacent corrugated protrusion 11B have the same phase, and the corrugated protrusion 11B and the adjacent corrugated protrusion 11B are in phase. The corrugated protrusion 11B adjacent next through 11A has the same phase. The corrugated protrusion 11 has an internal space 11K opened to the second surface side Z2. The above-mentioned “first surface on the side of the sheet-like non-woven fabric in plan view” is the first surface of the non-woven fabric 10 viewed from above when the non-woven fabric 10 is placed on a flat surface, and the non-woven fabric 10 viewed from below. Let the surface be the second surface.

  The corrugated protrusion 11 protrudes continuously from the first surface side Z1 in a corrugated manner, and each protruding portion becomes a first protrusion 21 as a first surface side protrusion. The first protrusion 21 has a waveform in the vicinity of the top of the waveform of the corrugated protrusion 11, that is, in the width direction of the corrugated protrusion 11 where the corrugated protrusion 11 </ b> A and the corrugated protrusion 11 </ b> B adjacent to each other in plan view are separated at a narrow interval. It arrange | positions at the side with a narrow space | interval between the protrusion parts 11. FIG. The first protrusion 21 has, for example, a crescent shape in plan view, and has a rounded trapezoidal shape or hemisphere. The shape of the first protrusion 21 in plan view is not limited to a crescent shape, and may be various shapes such as a triangle and an oval shape, and each shape has a rounded corner. There may be. In the present embodiment, the first projecting portion 21 is not limited to the above-described shape, and may be any projecting shape, for example, various cone shapes (in this specification, the cone shape is a cone, a truncated cone, It means to include a wide range of pyramids, truncated pyramids, oblique cones, etc.).

  In a region where the adjacent corrugated protrusions 11A and 11B are widely separated from each other, a second protrusion 22 as the second surface side protrusion protruding from the second surface side Z2 opposite to the first surface side Z1 is provided. Have. The second surface side protrusion 22 is continuous with the corrugated protrusion 11 without contradiction. In the present specification, “continuous without contradiction” refers to a state in which, when a specific shape portion is continuous and formed into a planar shape, it is not refracted or discontinuous and is entirely composed of a curved surface. The curved surface may include a plane in part. It is also preferable that the top portion 22T of the second surface side protruding portion 22 has an opening 23 that communicates from the first surface side Z1 to the second surface side Z2. The second protrusion 22 has an internal space 22K that opens to the first surface side Z1.

Hereinafter, the 1st protrusion part 21 makes the waveform protrusion part 11A side the 1st protrusion part 21 (21A), and makes the waveform protrusion part 11B side the 1st protrusion part 21 (21B).
Between the 1st protrusion part 21A and the 1st protrusion part 21B in the area | region where the adjacent waveform protrusion parts 11A and 11B were narrowly spaced apart, it becomes continuous with the 1st protrusion part 21A and the 1st protrusion part 21B. A ridge portion 24 having a buttock-like shape is arranged. The ridge 24 is lower than the corrugated protrusion 11 on the second surface side Z2. Therefore, the first protrusion 21 is a protrusion having two vertices with the ridge 24 interposed therebetween.

  In the corrugated protrusion 11, the upper portion excluding the first protrusion 21A is the ridge 25 (25A) of the corrugated protrusion, and the upper portion excluding the first protrusion 21B is the ridge 25 (25B) of the corrugated protrusion. And the part of the waveform protrusion part 11 except the 1st protrusion part 21 and the ridge part 25 is set as the wall part 11W.

The second projecting portion 22 includes a top portion 22T and a wall portion 22W. The wall portion 22W is formed in an annular shape, and one side (second surface side Z2) of the wall portion 22W is continuously formed around the opening on the first surface side Z1 of the top portion 22T. The other side (first surface side Z <b> 1) of the wall 22 </ b> W is configured to be continuous with the corrugated protrusion 11 and the ridge 24.
The “annular shape” of the wall portion 22W here is not particularly limited as long as it has an endless series of shapes in plan view, and may be any shape such as a circle, an ellipse, a rectangle, or a polygon in plan view. May be. In order to maintain the continuous state of the sheet suitably, a circle or an ellipse is preferable. Furthermore, speaking of “annular” as a three-dimensional shape, any ring structure such as a cylinder, an oblique cylinder, an elliptical column, a truncated cone, a truncated cone, a truncated elliptical cone, a truncated quadrangular pyramid, and a truncated oblique pyramid In order to realize a continuous sheet state, a cylinder, an elliptical column, a truncated cone, and a truncated elliptical cone are preferable.

As described above, the nonwoven fabric 10 is basically composed of the corrugated protrusion 11, the second protrusion 22, and the ridge 24, and does not become discontinuous, and the entire surface is continuous with a curved surface or a flat surface. It is arranged.
In particular, as shown in FIG. 3, the corrugated protrusion 11 is composed of an upper part P1 (first surface side Z1) obtained by dividing the nonwoven fabric thickness T into three equal parts and an intermediate part P3. Part 11W is configured. The 2nd protrusion part 22 is comprised by making the lower part P2 (2nd surface side Z2) which divided the nonwoven fabric thickness T into 3 equal to the 2nd protrusion part top part 22T, and the intermediate part P3 as the wall part 22W. Therefore, the intermediate part P3 is shared by the wall part 11W and the wall part 22W.
In addition, when the nonwoven fabric thickness T is thin and the nonwoven fabric 10 is thick, or when the kurtosis or curvature of each apex is different, the second protrusion apex 22Tp (in the case of having the aperture 23, the aperture is opened). 23 is assumed to be the apex of the second projecting portion apex 22T), and a straight line from the first projecting apex 21Tp to the adjacent first projecting apex 21Tp is divided into three equal parts. The lower part of the nonwoven fabric 10 divided by a curved surface obtained by rotating around a line parallel to the z-axis passing through the protruding part vertex 22Tp may be the second protruding part top part 22T, and the intermediate part may be the wall part 22W. Alternatively, a straight portion in the cross section may be used as the wall portion 22W, and a lower region that is curved and rounded from the wall portion 22W may be used as the second protruding portion top portion 22T.

The second protrusion top 22T has a rounded truncated cone shape or a hemispherical shape. In the present embodiment, the second projecting portion 22 is not limited to the above-described shape, and may be any projecting shape, such as various cone shapes (in this specification, the cone shape is a cone, a truncated cone, It is meant to include a wide range of pyramids, truncated pyramids, oblique cones, etc.).
In the present embodiment, the second projecting portion 22 has a truncated cone-shaped or hemispherical inner space 22K having a rounded top at the second surface side Z2.

  The above-mentioned nonwoven fabric 10 is comprised by the curved surface or plane which the whole continued. Thus, it is preferable that the nonwoven fabric 10 has a continuous structure in the surface direction. This “continuation in the plane direction” means that there are no intermittent portions or small holes. However, fine holes such as gaps between fibers are not included in the small holes. The small hole is defined as, for example, a hole having a diameter equivalent to a circle of 1 mm or more.

  The fiber material that can be used for the nonwoven fabric 10 of the present invention is not particularly limited. Specific examples include the following fibers. Polyolefin fibers such as polyethylene (PE) fibers and polypropylene (PP) fibers; there are fibers that use a thermoplastic resin such as polyethylene terephthalate (PET) and polyamide alone, and there are structures of core-sheath type, side-by-side type There are composite fibers. In the present invention, it is preferable to use a composite fiber. Examples of the composite fiber include a core-sheath fiber having a high melting point component as a core portion and a low melting point component as a sheath portion, and a side-by-side fiber in which a high melting point component and a low melting point component are arranged in parallel. Preferred examples thereof include fibers having a core-sheath structure in which the sheath component (low-melting-point component) is polyethylene or low-melting-point polypropylene. Typical examples of the fibers having the core / sheath structure include PET (core) / PE ( Examples include fibers having a core-sheath structure such as a sheath), PP (core) / PE (sheath), polylactic acid (core) / PE (sheath), and PP (core) / low melting point PP (sheath). More specifically, the constituent fibers preferably include polyolefin fibers such as polyethylene fibers and polypropylene fibers, polyethylene composite fibers, and polypropylene composite fibers. Here, the composite composition of the polyethylene composite fiber is polyethylene terephthalate / polyethylene, and the composite composition of the polypropylene composite fiber is preferably polyethylene terephthalate / low melting point polypropylene, and more specifically, PET (core). / PE (sheath), PET (core) / low melting point PP (sheath). These fibers may be used alone to form a nonwoven fabric, but can also be used as a mixed fiber in which two or more kinds are combined.

Next, the dimension specification in the nonwoven fabric 10 of this embodiment is demonstrated below.
The nonwoven fabric thickness T may be appropriately adjusted depending on the use, but when used as a surface sheet of diapers, sanitary products, etc., it is 1 mm or more, preferably 1.5 mm or more, and more preferably 1.8 mm or more. And it is 7 mm or less, Preferably it is 5 mm or less. Moreover, they are 1 mm-7 mm, Preferably they are 1.5 mm-5 mm, More preferably, they are 1.8 mm-5 mm. By setting it as the said range, the moderate excretion capture | acquisition property at the time of use is realizable. The interval between the corrugated protrusions 11 may be appropriately adjusted depending on the application, and when used as a surface sheet such as a diaper or a sanitary product, the nonwoven fabric thickness T is within the above range and the corrugated protrusions 11 are closest to each other. The distance d1 at 0.2 mm to 10 mm, preferably 0.2 mm to 5 mm, more preferably 0.2 mm to 3 mm, and the distance d2 at the position where the corrugated protrusions 11 are farthest from each other is 1 mm to 20 mm, preferably By setting it as 1 mm-15 mm, More preferably, it is 2 mm-10 mm, the amount of loose stool adhesion can be reduced and a stool diffusion area can be made small. Furthermore, the hole diameter of the opening 23 is 0.5 mm to 5 mm in terms of a circle, preferably 1 mm to 3 mm, more preferably 1 mm to 3 mm, so that the liquid return from the absorber is suppressed and the stool is transferred to the absorber. , Can promote absorption. The above-mentioned circle conversion is to obtain, for example, the area of the opening 23 by converting into the area of the circle, and the hole diameter is expressed by the diameter of the circle obtained by conversion.
The basis weight of the nonwoven fabric 10 is not particularly limited, a ^15g / ^{m 2 ~70g} / m 2 the average value of the entire sheet, preferably from ^{20g / m 2 ~40g / m 2} .

  The nonwoven fabric 10 demonstrated by the said embodiment has the following effects.

<Soft stool adhesion and stool diffusion area>
Further, since the corrugated protrusions 11 are arranged in parallel, and the corrugated phases of the adjacent corrugated protrusions 11 in plan view are arranged in opposite phases, the nonwoven fabric 10 is a surface material of the absorbent article. When used as a (surface sheet), the liquid (high-viscosity liquid such as soft stool and menstrual blood) supplied to the nonwoven fabric 10 is accumulated in the internal space 22K of the second protrusion 22 at the position where the liquid is supplied. If the amount stored in the space 22K is exceeded, it tends to expand in the y (MD) direction and the x (CD) direction. At that time, the corrugated protrusion 11 is dammed in the x direction and the ridge 24 is temporarily dammed in the y direction, but the y direction is adjacent to the ridge 24 beyond the dam amount. It extends to the internal space 22K. At this time, since the ridge portion 24 has fiber orientation in the MD direction, it is captured more efficiently in the adjacent internal space 22K. As a result, the diffusion of the liquid in the x direction is more effectively suppressed, and lateral leakage and the like are further suppressed. In each direction, the corrugated protrusion 11 and the ridge 24 serve as a weir, so that they do not diffuse over a wide range. In this way, the spread of the liquid is suppressed by the corrugated protrusion 11 and the ridge 24. In particular, the effect of suppressing the spread of a highly viscous liquid such as soft stool is great.
Moreover, since the 2nd protrusion top part 22T has the opening 23, a liquid transfers to an absorber (not shown) through the opening 23, and is absorbed. That is, the liquid permeability of the liquid is enhanced by the opening 23. For this reason, the spreading | diffusion of the liquid to a plane direction is suppressed more. In this way, the amount of loose stool adhesion is reduced and the stool diffusion area can be reduced. Therefore, adhesion of soft stool to the skin is reduced, and a clean feeling can be enhanced.
The MD is also referred to as a machine direction, which is a fiber web feeding direction when manufacturing a nonwoven fabric, and is an abbreviation for “Machine Direction”. The CD is a direction orthogonal to the MD and is an abbreviation of “Cross Direction”.

  Since the nonwoven fabric 10 of the present invention has an internal space 11K inside the corrugated protrusion 11, when the nonwoven fabric 10 is used as a surface material (surface sheet) of an absorbent article, the internal space 11K has a liquid surface material (nonwoven fabric). It functions as a buffer for temporarily storing liquid after passing through 10) until it is absorbed by an absorber (not shown), and also functions as a liquid passage to a region that does not absorb liquid.

  Furthermore, the nonwoven fabric 10 has the 1st protrusion part 21 in the 1st surface side Z1 of the waveform protrusion part 11, and a contact with a user's skin surface becomes a point contact instead of the line contact by the waveform protrusion part 11, Since the distance from the skin surface is maintained and the contact area with the skin is reduced, there is an effect that the air permeability is improved and the touch is improved. Moreover, in the 1st surface side of the waveform projection part 11, since the 1st projection part 21 is distribute | arranged to the side where the waveform projection parts 11 approached, there exists an effect which is hard to be crushed with respect to the same load.

  In the nonwoven fabric 10 of the present invention, since the corrugated protrusions 11 are arranged along the y direction (MD direction), it is difficult to expand and contract in the y direction and is arranged in parallel in the x direction (CD direction). It is easy to expand and contract in the direction. Thereby, when the nonwoven fabric of this invention is used for the surface sheet or intermediate | middle sheet | seat of an absorbent article, since it is hard to expand-contract in ay direction, there exists a property which maintains an original shape and it is hard to bend. On the other hand, since it is easy to expand and contract in the x direction, it is possible to obtain an absorbent article that does not feel uncomfortable such as hardness between the crotch.

Next, a preferable example of the method for manufacturing the nonwoven fabric 10 will be described below with reference to FIGS. 6 and 7.
As shown in FIG. 6A, a support 110 is used as an example of a web-shaped support. The support 110 has a number of protrusions 112 corresponding to the positions where the second protrusions 22 are shaped, and holes 113 are arranged corresponding to the positions where the first protrusions 21 are shaped. Yes. That is, as shown in FIG. 7, the support 110 has an uneven shape, and the protrusions 112 and the holes 113 are alternately arranged in different directions on the plate body as the base 111. For example, the protrusions 111 and the holes 112 are alternately arranged in the x direction and the y direction, respectively. The protrusion 112 is disposed on the surface side of the base 111, has a first surface 112A, and a second surface 112B that faces the first surface 112A, and is rounded upward when viewed from the first surface 112A or the second surface 112B side. It is an isosceles trapezoid. The support 110 is not limited to the above-described configuration, and protrusions are arranged at intervals in the x direction and the y direction on the first surface side of the base, and between the protrusions in the x direction and the y direction. Any material having holes may be used. For example, the base is composed of a plurality of rods arranged in parallel in the y direction, and projections and holes are alternately arranged between adjacent rods (x direction), and between the rods in the y direction, The support body may be configured such that the regions surrounded by the protrusions are alternately arranged with holes. Moreover, the shape of the protrusion 112 can take various shapes, such as a plate and a cone. The plan view shape of the hole 113 may take various shapes such as a circle, an oval, an ellipse, a polygon, and a polygon having rounded corners.

As shown in FIG. 6A, a web (also referred to as a fiber web) 50 is disposed on the support 110, and the first hot air W <b> 1 (indicated by an arrow in the figure) is blown toward the web 50. . In this case, the corrugated protrusion 11 is shaped correspondingly between the hole 113 and the protrusion 112 of the support 110, and the first protrusion 21 is imparted to the first surface side Z1 of the corrugated protrusion 11 corresponding to the hole 113. The second protrusion 22 is shaped corresponding to the position of the protrusion 112. At this time, an opening 23 is formed in the top portion 22T of the second protrusion 22.
Accordingly, a planar wave shape continuously projecting in a waveform on the first surface side Z1 on the planar view side is formed, and the waveform projections 11 having the internal space 11K are arranged in parallel and adjacent waveform projections 11, The waveform phase of one waveform protrusion 11 (11A) and the waveform phase of the other waveform protrusion 11 (11B) are arranged in opposite phases. At the same time, the second projecting portion 22 projecting to the second surface side Z2 and having the internal space 22K is disposed in a region where the adjacent corrugated projecting portion 11A and the corrugated projecting portion 11B are separated by a wide interval.

Specific examples of this production method include the following embodiments.
The web 50 containing fibers having different fineness before being fused is conveyed and fixed on a support 110 of a shaping apparatus from a card machine (not shown) so as to have a predetermined thickness.
Next, the first hot air W1 is blown onto the web 50 on the support 110, and the web 50 is shaped so as to conform to the shape of the support 110 (the state shown in FIG. 6A). The temperature of the first hot air W <b> 1 at this time is preferably 0 ° C. to 70 ° C. lower than the melting point of the thermoplastic fiber constituting the web 50, and more preferably 5 ° C. to 50 ° C. The wind speed of the first hot air W1 is set to 20 to 150 m / s, preferably set to 30 to 100 m / s, and more preferably set to 40 to 80 m / s from the viewpoints of formability and texture. . When the wind speed is slower than the lower limit value, the corrugated protrusion 11 and the second protrusion 22 are not sufficiently shaped, and effects such as a reduction in the amount of loose stool adhesion and a reduction in the stool diffusion area are not sufficiently exhibited. If the wind speed exceeds the upper limit value, the diameter of the opening 23 of the second protrusion top 22T becomes too large, and it becomes easy to be crushed. Therefore, the amount of loose stool adhesion increases, the stool diffusion area increases, and a sufficient effect is obtained. I can't. In addition, the excrement is likely to return backward through the large opening 23.
In this way, the web 50 is shaped into an uneven shape.

  In the web shaping, as shown in FIG. 8, when attention is paid to one hole 113 of the support 110, two first projecting portions 21 </ b> A and 21 </ b> B are made with respect to the hole 113. This is because the web 50 is divided along the first and second surfaces 112A and 112B and both side surfaces 112C of the projection 112 arranged in a direction orthogonal to the web conveyance direction of the support 110, and both sides of the projection 112 are separated. The portions of the web 50 divided in the CD direction along the surface 112C try to gather separately at the central portion of the hole 113 adjacent to the protrusion 112. That is, a part of the web 50 selected by the protrusions 112 on both sides in the CD direction of the hole 113 gathers in the hole 113 from both sides of the hole 113 in the CD direction, so that two first protrusions 21A and 21B are formed. . Further, since the portion of the web 50 selected along the first and second surfaces 112A and 112B of the protrusion 112 also tends to gather at the center portion of the hole 113, the portion between the first protruding portions 21A and 21B is formed at this web 50 portion. The ridge part 24 is made. Further, the opening 23 is made when the tip of the protrusion 112 penetrates the web 50.

  Next, as shown in FIG. 6B, the second hot air W2 (shown by an arrow in the drawing) at a temperature at which each fiber of the web 50 can be appropriately fused is blown to fuse the fibers together. Let The temperature of the second hot air W <b> 2 is preferably 0 ° C. to 70 ° C. higher than the melting point of the thermoplastic fiber constituting the web 50, preferably 5 ° C. to 50 ° C. in consideration of the fiber material used for the nonwoven fabric 10. It is more preferable. The wind speed of the second hot air W2 is set to 1 to 10 m / s, preferably 3 to 8 m / s. If the wind speed of the second hot air W2 is too slow, heat cannot be transferred to the fibers. The fibers are not fused together, and the uneven shape is not fixed sufficiently. On the other hand, when the wind speed is too high, heat is applied to the fiber too much and the texture becomes inferior.

  The shaping apparatus (not shown) for carrying out the manufacturing method is a conveyor type or drum type capable of transporting the support 110 in consideration of continuous production, and the molded nonwoven fabric 10 that is transported, The mode which winds up with a roll is mentioned. In this way, the nonwoven fabric 10 of the present invention is obtained.

  As the thermoplastic fiber, the fiber described above is used. For example, when a composite fiber containing a low melting point component and a high melting point component is used as the thermoplastic fiber, the temperature of the second hot air W2 sprayed on the web 50 is equal to or higher than the melting point of the low melting point component and lower than the melting point of the high melting point component. It is preferable. More preferably, the temperature is at least 10 ° C lower than the melting point of the high melting point component, more preferably at least 5 ° C higher than the melting point of the low melting point component, and more preferably at least 20 ° C lower than the melting point of the high melting point component. .

  The web 50 preferably contains 30% by mass to 100% by mass of thermoplastic fibers, more preferably 40% by mass to 100% by mass, and still more preferably 50% by mass to 100% by mass. The web 50 may include fibers that are not inherently heat-fusible (for example, natural fibers such as cotton and pulp, rayon and acetate fibers).

  In the said manufacturing method, the shape like the above-mentioned nonwoven fabric 10 is obtained by arranging the 1st surface A and 2nd surface B of the processus | protrusion 112 of the support body 110 in the direction orthogonal to a conveyance direction (MD direction). Can do. In addition, it is desirable that the pitch in the MD direction and the pitch in the CD direction of the protrusions 112 of the support 110 be 1: 3 to 3: 1.

The above-described nonwoven fabric 10 has the following configuration when viewed from the second surface side Z2.
As shown in FIG. 9, the corrugated groove portion 26 forms a waveform in a plan view that is continuously dented in a waveform from the second surface side Z2 opposite to the first surface side Z1 on the side in which the nonwoven fabric 10 is viewed in plan to the first surface side Z1. Are arranged in parallel. In the corrugated groove portion 26, the phase of the waveform of the adjacent one of the corrugated groove portions 26 (26A) is opposite to the phase of the waveform of the other corrugated groove portion 26 (26B). Further, the adjacent corrugated groove portions 26A and 26B have a region (narrowly spaced region) separated from each other and a region widely separated from the region. In the widely spaced region, there is a second surface side protruding portion 22 protruding to the second surface side Z2. The narrowly spaced region has a communication groove 27 that connects the corrugated groove portions 26 to each other. An opening 23 is provided at the top of the second surface side protruding portion 22. Moreover, the 1st protrusion part 21 which protrudes in the 1st surface side Z1 exists in each bottom part of the waveform groove part 26A, 26B. The back surface side (second surface side Z <b> 2) of the first protrusion 21 has a small recess at the bottom of the corrugated groove 26, and constitutes the internal space of the first protrusion 21.
When this nonwoven fabric 10 is used for an intermediate sheet (not shown) disposed between the top sheet and the absorbent body of the absorbent article, the liquid passed from the top sheet is quickly diffused through the corrugated grooves 26A and 26B. Can be absorbed by the liquid diffused in the absorber, thereby increasing the absorption rate into the absorber. And since the 2nd surface side protrusion part 22 is distribute | arranged to the surface sheet side, the space | interval of a surface sheet and an intermediate sheet is maintained, and air permeability becomes good. Further, since the opening 23 is arranged so as to contact the surface sheet, it is easy to allow the liquid to flow from the surface sheet to the absorber through the opening 23, and the internal space 22K of the second surface side protruding portion 22 serves as a buffer. It has a function, and wetback from the absorber through the opening 23 can be suppressed.

Next, as an example in which the nonwoven fabric 10 of the present invention is applied to an absorbent article, an application example of the diaper 100 to the absorbent main body 4 will be described with reference to FIG.
As shown in FIG. 10, the disposable diaper which applied the nonwoven fabric 10 of this invention to the surface sheet 1 is partially cut away, and it is a perspective view which shows typically. The diaper shown in the figure is a tape-type disposable diaper for infants, and is shown in a state where a diaper developed in a plane is bent slightly and viewed from the inside (skin contact surface side).

  The disposable diaper 100 includes a liquid-permeable top sheet 1 disposed on the skin contact surface side, a liquid-impermeable back sheet 2 disposed on the non-skin contact surface side, and absorption interposed therebetween. And a body 3. The nonwoven fabric 10 of the said embodiment is applied to the surface sheet 1, and the 1st protrusion part 11 side is made into the skin contact surface. An absorber 3 is interposed between the back sheet 2 and the top sheet 1. The back sheet 2 is in an unfolded state, and both side edges thereof have a shape confined to the inside in the longitudinal central portion C. Even if the back sheet 2 is composed of a single sheet, it is composed of a plurality of sheets. Also good. In this example, a side leakage prevention gather 7 formed by the side seats 5 is provided, whereby side leakage of liquid or the like in the hip joint portion due to movement of the infant can be effectively prevented. In the diaper of this embodiment, a functional structure part, a sheet material, etc. may be provided. In addition, in FIG. 10, the arrangement | positioning relationship and boundary of each member are not illustrated strictly, and if it is set as the general form of this kind of diaper, the structure will not be specifically limited.

  The diaper is shown as a tape type, and a fastening tape 6 is provided on the flap portion on the back side R. Fastening tape 6 can be affixed to a tape affixing part (not shown) provided in the flap part of ventral side F, and a diaper can be mounted and fixed. At this time, the center part C of the diaper is gently bent inward so that the absorbent body 3 is worn along the baby's buttocks and lower abdomen. As a result, excreta is absorbed and held in the absorber 3 accurately. By using in such a form, especially the non-woven fabric 10 is applied as the top sheet 1, it shows a good touch, cushioning properties, and excretion capturing properties. In particular, the excretion capture ability can achieve extremely high performance that cannot be achieved with a conventional surface sheet of only a linear protrusion or a thing with a small hole. It can protect suitably from the rough skin by loose stool etc.

  The above-mentioned nonwoven fabric 10 can be used as an intermediate sheet (not shown) of an absorbent article. For example, it can be used as an intermediate sheet disposed between the top sheet 1 and the absorbent body 3 in the absorbent article 100 described above. For example, the above-mentioned nonwoven fabric 10 is arranged so that the first surface side Z1 is on the surface sheet 1 side. That is, it arrange | positions so that the waveform protrusion part 11 may become the surface sheet 1 side. Therefore, the 2nd protrusion part 22 is distribute | arranged to the absorber 3 side. In this case, a distance can be provided between the surface material and the absorbent body, liquid return from the absorbent body can be largely prevented, and further, vapor from the absorbent body can be kept away from the skin, so that it can be made less stuffy. . Moreover, it arrange | positions so that the 2nd surface side Z2 of the nonwoven fabric 10 may become the surface sheet 1 side. That is, it arrange | positions so that the waveform projection part 11 may become the absorber 3 side. Therefore, the 2nd protrusion part 22 is distribute | arranged to the surface sheet 1 side. The same applies to this case.

The nonwoven fabric 10 of the present invention can be used for various applications. For example, it can be suitably used as a surface sheet of absorbent articles such as disposable diapers, sanitary napkins, panty liners, urine absorption pads and the like. Furthermore, since the nonwoven fabric 10 is excellent in air permeability, liquid diffusibility, deformation characteristics at the time of pressing force, etc. due to the concavo-convex structure, it is interposed between a surface sheet such as a diaper or sanitary product and an absorbent body. It can also be used as a sublayer. In addition, the form utilized as a gather of an absorbent article, an exterior sheet, and a wing is also mentioned. Furthermore, the form utilized as a wiping wipe sheet | seat, a cleaning sheet | seat, and a filter is also mentioned.
The following nonwoven fabrics and the like are further disclosed with respect to the above-described embodiment.

<1> Waveform protrusions that continuously protrude in a waveform and form a waveform in plan view are arranged in parallel on the first surface side of the nonwoven fabric in plan view,
The phase of the waveform of one of the adjacent waveform protrusions and the phase of the waveform of the other waveform protrusion are opposite phases,
The adjacent corrugated protrusions have a region separated from each other and a region widely separated from the region, and project in the second surface side opposite to the first surface in the widely separated region. The nonwoven fabric which has a continuous 2nd surface side protrusion part.
<2> The nonwoven fabric according to <1>, wherein the second surface side protruding portion has an opening at the top.
<3> The corrugated protrusion has a first surface-side protrusion that protrudes toward the first surface at the top of the corrugation in plan view, and the first surface-side protrusion that sandwiches a narrowly spaced region between the corrugated protrusions. The non-woven fabric according to <1> or <2>, wherein the nonwoven fabric has a continuous ridge portion so as to be recessed on the second surface side between the portions.
<4> The nonwoven fabric according to any one of <1> to <3>, wherein the corrugated protrusion has an internal space.
<5> The nonwoven fabric according to any one of <1> to <4>, wherein the second surface side protruding portion has an internal space.
<6> The nonwoven fabric according to any one of <1> to <5>, wherein the ridge has fiber orientation in the MD direction.
<7> The nonwoven fabric according to any one of <3> to <6>, wherein the first surface side protruding portion has a crescent shape in plan view and a trapezoid with a round cross section.
<8> The second surface side projecting portion is configured by a top portion and a wall portion, the wall portion is configured in a ring structure, and one side of the wall portion is configured continuously around the opening on the first surface side of the top portion. The non-woven fabric according to any one of <1> to <7>, wherein the other side of the wall portion is configured continuously with a corrugated protrusion and a ridge.
<9> The nonwoven fabric according to any one of <1> to <8>, wherein the second surface side protruding portion top is a rounded truncated cone.
<10> The nonwoven fabric according to any one of <1> to <9>, wherein the nonwoven fabric has a thickness of 1 mm to 7 mm.
<11> It has a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the both sheets,
The absorbent article which uses the nonwoven fabric any one of said <1> to <10> for the said surface sheet.
<12> It has a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the both sheets.
The disposable diaper for infants which uses the nonwoven fabric of any one of said <1> to <10> for the said surface sheet.
<13> It has a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the both sheets,
An absorbent article in which an intermediate sheet is disposed between the top sheet and the absorbent body, and the nonwoven fabric according to any one of <1> to <10> is used for the intermediate sheet.
<14> having a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the two sheets,
A disposable diaper for infants, wherein an intermediate sheet is disposed between the top sheet and the absorber, and the nonwoven fabric according to any one of <1> to <10> is used for the intermediate sheet.
<15> A web of fibers containing thermoplastic fibers is transported onto a support having a plurality of protrusions and a plurality of holes, and hot air is blown onto the support, and the web has a concavo-convex shape along the support. A method for producing a non-woven fabric to be shaped,
The support includes a base, the plurality of protrusions disposed on a first surface side of the base in a plan view of the support, and the first surface side of the base opposite to the first surface side. Having the plurality of holes leading to the second surface side;
The protrusions and the holes are alternately arranged in the first direction and the second direction orthogonal to each other on the first surface side plane,
The protrusion has a first surface and a second surface facing each other,
The said 1st surface and the said 2nd surface are arrange | positioned in the direction orthogonal to the conveyance direction of the said web, The manufacturing method of a nonwoven fabric.

  Hereinafter, the present invention will be described in more detail based on examples. The present invention is not construed as being limited by these examples.

[Example 1-3]
In Example 1, a 2.4 dtex × 51 mm core-sheath composite fiber having a core of polyethylene terephthalate and a sheath of polyethylene was supplied from the card machine to the shaping device so that the basis weight was 30 g / m ² . In the shaping apparatus, the fiber web 50 was fixed on the support 110 having a large number of protrusions and air permeability. The MD pitch 5 mm and the CD pitch 8 mm in plan view of the protrusions 111 of the support 110 were set.
Subsequently, hot air (temperature 130 ° C., wind speed 50 m / s) is blown onto the fiber web 50 on the support 110 to form the fiber web 50 along the protrusions 111 on the support 110. The core-sheath structure fibers were fused by switching to hot air having a temperature of 145 ° C. and a wind speed of 5 m / s. The nonwoven fabric 10 thus formed by heat fusion was taken out and used as a nonwoven fabric test body of Example 1. The basis weight of the nonwoven fabric 10 of Example 1 was 30 g / m ² , and the thickness T was 4.6 mm.
In Example 2, the nonwoven fabric 10 was produced under the same conditions as in Example 1 except that the MD pitch in a plan view of the protrusions 111 of the support 110 was 5 mm and the CD pitch was 10 mm.
In Example 3, the nonwoven fabric 10 was produced under the same conditions as in Example 1 except that the MD pitch 7.5 mm and the CD pitch 15 mm in plan view of the protrusions 111 of the support 110 were set.

[Comparative Example 1-3]
Comparative Example 1 is a non-woven fabric test specimen using a fiber web having a basis weight of 30 g / m ² made of a 2.4 dtex × 51 mm core-sheath type composite fiber having a core of polyethylene terephthalate and a sheath of polyethylene, and a general air-through method. Was made. The thickness of the nonwoven fabric of Comparative Example 1 was 0.9 mm.
In Comparative Example 2, a non-woven fabric specimen was prepared by the manufacturing method of Example 1 described in Japanese Patent Laid-Open No. 03-137258 (Patent Document 1). The nonwoven fabric thickness of Comparative Example 2 was 5.5 mm.
In Comparative Example 3, a non-woven fabric test body having a streak-like uneven shape was produced by the manufacturing method of Example 1 described in JP-A-2008-25081 (Patent Document 2). The nonwoven fabric thickness of Comparative Example 3 was 1.3 mm.

  Next, a measurement method and an evaluation method will be described. The following measurement tests were performed using the above-mentioned nonwoven fabric test specimens.

<Measurement of thickness>
The cut surface of the nonwoven fabric test body was enlarged to a size (10 to 100 times) that allows a site measured with a digital microscope VHX-1000 manufactured by Keyence to sufficiently enter the field of view, and the nonwoven fabric thickness T (mm) was measured. The nonwoven fabric thickness T is the top surface of the first protrusion 21 located on the first surface side Z1 farthest from the second surface side Z2 and the second surface farthest from the first surface side Z1 in the nonwoven fabric 10 viewed from the side. It was set as the space | interval of the parallel plane which passes along the vertex of the 2nd protrusion part 22 located in the side Z2. The measurement was performed 5 times for each, and the average value was defined as the nonwoven fabric thickness T (mm) of the test specimen.

<Measurement of fiber orientation (orientation angle, orientation strength)>
Measurement of fiber orientation (orientation angle, orientation strength) was performed as follows.
Using a scanning electron microscope JCM-5100 manufactured by JEOL Ltd., the sample was placed so that the z-axis direction in FIG. (Adjustment to a magnification capable of measuring 10 or more fibers to be measured: 100 to 300 times) was printed, and the fibers were traced on a sheet made of transparent PET. The said image was taken in in the personal computer and the said image was binarized using the NexusNew Inc. nextNewcube (stand-alone version) image processing software. Next, the binarized image is subjected to Fourier transform using Fiber Orientation Analysis 8.13 Single software manufactured by Nexus Co., Ltd., which is a fiber orientation analysis program, to obtain a power spectrum, and from an elliptical distribution map, An orientation angle and orientation strength were obtained.

The orientation angle indicates the angle at which the fibers are most oriented, and the orientation strength indicates the strength at the orientation angle. In the measurement of the 1st protrusion part 21 and the ridge part 24, it shows that the fiber is orientated toward MD direction, so that an orientation angle is a value close | similar to 90 degrees, and if it is 70 degrees-110 degrees, it will be MD direction It was judged that the fibers were oriented.
Moreover, it represents that the direction of a fiber has gathered, so that the value of orientation strength is large. The case where the orientation strength is 1.05 or more is regarded as being oriented.
The orientation angle and orientation strength were measured at three locations, and the average of these measured values was taken as the orientation angle and orientation strength of the test specimen. In the examples of the present application and the comparative example, the measurement of the orientation angle and orientation strength of the wall portion was performed on the CD direction cross section.

The fiber orientation described above is a concept consisting of the orientation angle and orientation strength of the fiber.
The fiber orientation angle is a concept that indicates in which direction a plurality of fibers having various directions are oriented as a whole, and the shape of the fiber aggregate is quantified. The orientation strength of the fiber is a concept indicating the amount of fibers exhibiting an orientation angle. The orientation strength is less than 1.05 and is hardly oriented, and it can be said that the orientation strength is 1.05 or more. However, in this embodiment, the fiber orientation changes depending on the part. That is, the orientation strength is changed during the transition from a part having a certain orientation angle to a part having a different orientation angle (while the fiber is changing from a state in which the orientation strength is strong in one direction to a part having a strong strength in a different orientation). It has various states such as a weak state and a high state due to reorientation. Therefore, it is preferable that the orientation angle of the fiber is changed between the part showing a strong orientation angle and the part showing a strong orientation angle in another direction even if the orientation strength of the fiber is weak, and the orientation strength is high. Is more preferable.

  Next, the evaluation method will be described. Evaluation examined the performance of the nonwoven fabric test body as sheet performance. That is, “soft stool adhesion amount”, “stool diffusion area”, etc. of the nonwoven fabric were evaluated.

<Evaluation method of soft stool adhesion and stool diffusion area>
As shown to Fig.11 (a), the disposable diaper for infants as the absorbent article 100 provided with the surface sheet 1 as a test body is set | placed horizontally, and the artificial loose stool 120 ( Bentonite: Glycerin: Water: Emulgen 130K (trade name, manufactured by Kao Corporation, surfactant) = 28: 14: 114: 14 mixed at a ratio of 28: 14: 114: 14 and adjusted to a viscosity of 300 mPa · s) 10 g was injected at a rate of 2 g / sec. And left to stand for 5 minutes. Thereafter, as shown in FIG. 11B, the transparent PET sheet 130 is gently placed on the surface of the top sheet 1, and further pressurized to 3.5 × 10 ³ Pa from above the transparent PET sheet 130. The state was maintained for 5 minutes. Then, the pressurization is stopped, the transparent PET sheet 130 is taken out, and the mass of the transparent PET sheet 130 before and after the pressurization is measured to calculate the mass of the pseudo loose stool 120 attached to the transparent PET sheet 130, The amount of loose stool adhered. Moreover, the area where the pseudo soft stool 120 after pressurization spread was measured and defined as the stool diffusion area.

  About the nonwoven fabric 10, the result is shown in Table 1 about the physical property (basis weight, thickness) and performance (soft stool adhesion amount, stool diffusion area).

なお、表１中、○印は「有る」ことを意味し、×印は「無い」ことを意味する。
また、「両面突出部の有無」とは、不織布を平面視した側の第１面側とこの第１面側とは反対側の第２面側との両方に突出部を有するか否かということを意味する。

In Table 1, “◯” means “present” and “x” means “not”.
Moreover, "the presence or absence of a double-sided protruding part" refers to whether or not there are protruding parts on both the first surface side of the nonwoven fabric in plan view and the second surface side opposite to the first surface side. Means that.

As is clear from the results shown in Table 1, Examples 1 to 3 obtained good results in any of the evaluation items.
The amount of loose stool adhesion was 0.12 g to 0.18 g. The stool diffusion area was 7 to 16 cm ² .

Comparative Example 1 had a very large amount of loose stool deposit of 1.93 g. In addition, the stool diffusion area was 78 cm ² .
In Comparative Example 2, the amount of loose stool attached was as large as 0.48 g. Moreover, the stool diffusion area was spread to 50 cm ² .
In Comparative Example 3, the amount of loose stool adhesion was as large as 0.68 g. Moreover, the stool diffusion area was spread to 58 cm ² .
In Comparative Example 4, the amount of loose stool adhesion was as large as 0.52 g. Moreover, the stool diffusion area was spread to 61 cm ² .

  As described above, in the nonwoven fabric 10 of this embodiment used in Examples 1 to 3, the corrugated protrusions 11 are arranged in parallel, and the waveform phases of the adjacent corrugated protrusions are opposite to each other. The amount of adhesion was reduced and the fecal diffusion area was reduced, and good evaluation results were obtained. In particular, in the wide structure of MD pitch and CD pitch at the time of the support, the fecal diffusion area was very small.

DESCRIPTION OF SYMBOLS 10 Nonwoven fabric 11 Corrugated protrusion 11K Internal space (of corrugated protrusion) 11W Wall (of corrugated protrusion) 21 First protrusion (first surface side protrusion)
22 2nd protrusion part (2nd surface side protrusion part)
22K Internal space (of second protrusion) 22T Second protrusion top (top of second protrusion)
22W (second protrusion) wall 23 opening 24, 25 ridge

Claims (7)

Waveform protrusions that continuously protrude in a waveform and form a waveform in plan view are arranged in parallel on the first surface side of the nonwoven fabric in plan view,
The phase of the waveform of one of the adjacent waveform protrusions and the phase of the waveform of the other waveform protrusion are opposite phases,
The adjacent corrugated protrusions are close to each other and have a region that is spaced apart and a region that is wider than that region, and projects to the second surface side opposite to the first surface side in the widely separated region. A second surface side protrusion that is continuous with the corrugated protrusion;
The corrugated protrusions have first surface-side protrusions protruding toward the first surface at the tops of the corrugations that represent the outer shape of the corrugated protrusions in plan view, and the corrugated protrusions approach each other. the ridge continuous as recessed second surface side possess between the first surface side projection sandwiching the optionally and spaced areas,該稜portion, on the second surface side of the waveform protrusion A nonwoven fabric that is lower and is closer to the first surface than the top of the second surface-side protruding portion .   The nonwoven fabric of Claim 1 which has an opening in the top part of the said 2nd surface side protrusion part.   The nonwoven fabric according to claim 1 or 2, wherein the corrugated protrusion has an internal space.   The nonwoven fabric of any one of Claim 1 to 3 which has internal space in the said 2nd surface side protrusion part. A top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the two sheets,
The absorbent article which uses the nonwoven fabric of any one of Claim 1 to 4 for the said surface sheet. A top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between the two sheets,
An absorbent article in which an intermediate sheet is disposed between the top sheet and the absorbent body, and the nonwoven fabric according to any one of claims 1 to 4 is used for the intermediate sheet. A web of fibers containing thermoplastic fibers is transported onto a support having a plurality of protrusions and a plurality of holes, and hot air is blown, and the uneven shape is formed on the web along the support. A method for producing a nonwoven fabric, comprising:
The support includes a base, the plurality of protrusions disposed on a first surface side of the base in a plan view of the support, and the first surface side of the base opposite to the first surface side. Having the plurality of holes leading to the second surface side;
The protrusions and the holes are alternately arranged in the first direction and the second direction orthogonal to each other on the first surface side plane,
The protrusion has a first surface and a second surface facing each other,
The said 1st surface and the said 2nd surface are arrange | positioned in the direction orthogonal to the conveyance direction of the said web, The manufacturing method of a nonwoven fabric.

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