JP2016214404A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which forms an embossment pattern visually excellent that has components stretching in an oblique direction by compressing a surface sheet and an absorber together and gives a wearer soft touch near intersections where the components stretching in the oblique direction cross.SOLUTION: An absorbent article has a liquid permeable surface sheet 14, a liquid impermeable rear surface sheet 12, and an absorber 13 arranged between the surface sheet 14 and the rear surface sheet 12, and has recesses where the surface sheet 14 and the absorber 13 are compressed. The recesses have: first recesses 23 to be grids which pass a crotch from the abdominal side of a wearer when the absorbent article is worn and are composed by components inclined to one side and components inclined to the other side with respect to virtual lines leading up to the back side and are positioned at intersections of the grids; and second recesses 21 positioned among the first recesses. Spaces between the first recesses 23 and the second recesses 21 are uncompressed areas 26.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an absorbent article. In particular, it relates to disposable diapers and absorbent pads.

  In an absorbent article such as a disposable diaper (hereinafter, also simply referred to as “diaper”), various improvements have been made to improve its function and wearing feeling.

  The absorbent article absorbs most of the body fluid discharged by the absorber. Here, since the diaper covers the abdomen, buttocks and crotch parts, the diaper is affected by various bodies such as walking, turning over, and baby's high and low, especially the movement of legs. In particular, the absorbent body may be twisted, broken, or cracked by various body movements. If it does so, the fitting property to the crotch of a diaper will fall and it will become easy to raise | generate a liquid leak. Therefore, in order to maintain the fit, for example, as shown in Patent Document 1, there is one in which embossing is performed on the non-skin contact surface side of the absorber. By embossing the absorbent body, the rigidity of the absorbent body is enhanced, and the absorbent body is less likely to sway and break against the force applied by the movement of the body.

  Moreover, as can be seen in Patent Document 2, the skin contact surface side of the absorbent body was embossed, which is an oblique lattice-shaped compressed groove extending obliquely with respect to the direction from the front to the back of the diaper. There are also things.

  Moreover, such embossing is formed by rotating and moving the embossing roll which an embossing pattern protrudes on the surface on a long absorber sheet. At the time of manufacturing a diaper, the embossing roll was rotated on a long absorbent sheet or the like and embossed, and then cut into a necessary size by laminating various sheets.

JP 2014-69002 A JP2015-16218A

  By the way, in order to prevent the groove from sagging even when pressure due to the weight of the wearer is applied, the present inventor, from the surface sheet (top sheet) side disposed on the skin contact surface side of the absorbent body, The top sheet and the absorber were compressed together to form a compression groove that was less likely to sag. In this case as well, as described above, the compressed groove is formed by rotating the embossing roll on the absorbent body on which the top sheet is laminated. Thus, when forming a compression groove | channel, the surface sheet etc. which are located in an upper layer rather than an absorber bite into a groove | channel by the press of an embossing roll. In particular, an emboss pattern having a component extending in an oblique direction, such as an oblique lattice shape, has a portion where the distance between points to be compressed simultaneously becomes short (the interval becomes narrow), such as near a lattice point. If the distance between the points to be compressed at the same time is short, the force for pulling the surface sheet from both adjacent compression points is strong, and the surface sheet tends to be strongly stretched.

  Since the compressed groove itself is lower than the uncompressed portion, it does not touch the wearer's skin directly, but the surface sheet and the absorber are near the intersection of the lattice (lattice point), that is, near the corner of the lattice. It is fixed in a tensioned state. For this reason, the powdery superabsorbent polymer (Super Absorbent Polymer, hereinafter also referred to as “SAP”) in the absorbent body sometimes hits the top sheet. If it does so, the corner | angular vicinity of the grid | lattice in the skin contact surface of a surface sheet will become hard compared with other parts, for example, the sensation of superabsorbent resin will be transmitted as a touch.

  Since the vicinity of the corners of the lattice is higher than the bottom of the compression groove, it touches the skin of the wearer and gives the wearer a firm feel and a stiff feel, which is not preferable. Since the absorbent article is in contact with delicate skin parts such as the crotch, a soft touch is required, and if the corners of the lattice are hard, the touch of the skin is not preferable.

  On the other hand, since a surface sheet is a wearer's skin contact surface, it is a location which a wearer can observe easily at the time of wear. If the embossed pattern has little regularity or design, the aesthetic effect is low, and in some cases, the wearer may misunderstand wrinkles due to manufacturing defects.

  The present invention forms a visually excellent embossed pattern having a component extending in an oblique direction by compressing the top sheet and the absorber together, and also provides a soft touch near the intersection where the component extending in the oblique direction intersects. It aims at providing the absorbent article given to a wearer.

  The absorbent article of the present invention has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, the top sheet and the absorbent body An absorbent article having a recessed portion compressed from the above, wherein the recessed portion is inclined to one side with respect to an imaginary line passing through the crotch from the wearer's belly side to the back side when the absorbent article is worn. And a component inclined to the other side, having a first recess located at the intersection of the grating and a second recess located between the first recesses, and between the first recess and the second recess Is a non-compressed region.

FIG. 1 is a three-dimensional projection view showing an appearance of an embodiment in which an absorbent article according to the present invention is applied to a pants-type disposable diaper. FIG. 2 is a partially broken plan view of the diaper shown in FIG. 1 as viewed from the skin contact surface side. FIG. 3 is a cross-sectional view of the diaper shown in FIG. 2 taken along line III-III. FIG. 4 is an exploded perspective view in which the diaper shown in FIG. 1 is developed and disassembled. FIG. 5 is a partial top view of the absorbent body portion of the diaper illustrated in FIG. 1 as viewed from the top sheet side. FIG. 6 is a schematic partial plan view showing an embossed pattern portion having an oblique lattice shape in FIG. FIG. 7 is an enlarged partial plan view in which a part of FIG. 6 is enlarged. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.

  An embodiment of an absorbent article according to the present invention will be described in detail with reference to FIGS. 1 to 9.

  In the external appearance of 1st Embodiment which applied this invention to the underpants type disposable diaper, the perspective view seen from the front side is shown in FIG. FIG. 2 shows a plan view of the diaper shown in FIG. 1 developed from the skin contact surface side. A sectional view taken along line III-III in FIG. 2 is shown in FIG. 3 and shown in FIG. 4 in a divided state in which the pants-type disposable diaper shown in FIGS.

  A pants-type disposable diaper (hereinafter may be simply referred to as a diaper) 10 in the present embodiment includes a front body region 10F, a back body region 10R, and a crotch region 10C that connects the front body region 10F and the back body region 10R. And have. Moreover, the waist periphery opening part 10W which surrounds a wearer's waist part with the front body area | region 10F and the back body area | region 10R at the time of wear is formed. Similarly, a pair of left and right leg openings 10L that surround the thigh portions of both legs of the wearer are formed by the lower end crotch region 10C of the front body region 10F and the back body region 10R. Then, except for the left and right leg opening 10L, the left and right ends of the cover sheet 11 are closed as shown by the closing portion 10J to form a pants-type diaper.

  When worn, the front body region 10F is positioned on the wearer's ventral side, and the back body region 10R is positioned on the wearer's back side. The crotch region 10 </ b> C covers the wearer's crotch, and the leg of the wearer is passed through the pair of left and right leg openings 10 </ b> L. Therefore, the leg periphery opening 10L is located at any position around the thigh from the base of the wearer's legs.

  The imaginary line P extends through the crotch part from the abdomen side to the back side in the central part of the diaper. Specifically, the imaginary line P extends, for example, along the diaper surface and in the vertical direction when the waist side of the diaper is up and the crotch side is down. It extends in the vertical direction. In other words, the vertical direction is a direction along the center axis of the body from the wearer's head to the crotch, and the virtual line P extends along the center axis of the body.

  As shown in FIG. 3 and FIG. 4, the diaper 10 in the present embodiment has a cover sheet 11, a back sheet 12, an absorber 13, and a top sheet 14 that touches the wearer's skin in order from the outside. Are joined together. On the left and right sides of the crotch region 10C of the cover sheet 11, a pair of cutout portions 11A each having a semicircular arc shape serving as a leg opening 10L is formed. The liquid-impermeable back sheet 12 is joined to the inner cover sheet 11B, and the previous absorber 13 is disposed between the back sheet 12 and the liquid-permeable top sheet 14, and the absorber 13 is attached to the inner cover sheet 11B. Thus, the top sheet 14 is joined to the back sheet 12. Between the outer cover sheet 11C and the inner cover sheet 11B formed of a thin non-woven fabric in order to obtain a good touch, the rubber thread 15 for forming the leg gathers and the yarn for forming the waist gathers The rubber 17 is joined in an extended state.

  In the present embodiment, a liquid-impermeable side sheet 18 is joined to the left and right side edges of the liquid-permeable top sheet 14, and a three-dimensional gather is formed on the inner edge of the left and right side sheets 18. The rubber thread 19 is joined in an extended state. Then, the side sheet 14 is drawn in the longitudinal direction by the expansion and contraction of the rubber thread 19 and becomes a three-dimensional gather with the inner edge rising as shown in FIG.

  In addition, as for the diaper 10 in this embodiment, the absorber 13 becomes long along the virtual line P, and the longitudinal direction is parallel to the virtual line P. A direction orthogonal to the virtual line P is defined as a width direction. In addition, the ratio of the longitudinal direction of a diaper and the width direction is not limited to this embodiment. This ratio is appropriately changed according to the wearer's body shape.

  Next, the structure of the absorber part in this embodiment is demonstrated.

  FIG. 5 is a partial top view of a portion where the absorber 13 and the top sheet 14 are located as viewed from the top sheet 14 side.

  The absorbent body 13 of the present embodiment located under the top sheet 14 is mainly made of pulp and a super absorbent polymer (hereinafter also referred to as “SAP”). The absorbent body 13 has an elongated shape so as to cover the front body, the crotch, and the back body. And it is divided into the front body part M1, the crotch part M2, and the back body part M3. In the crotch portion M2, a pair of notches 13a having an arc shape is formed in accordance with a pair of left and right leg openings 10L surrounding the thick crotch portions of both legs. Note that the notch 13 a may not be formed according to the size of the absorber 13. Further, the absorber 13 of the present embodiment is provided with a notch 13a and is an hourglass type in which the width of the central portion is narrower than the front and rear ends, but the shape of the absorber of the present invention is the same. Not exclusively. When the front body part and the back body part are the front and back (up and down) direction, and the direction orthogonal to it is the left and right direction, for example, the corners of the front and back (up and down) ends are rounded off, the ellipse extending in the front and back (up and down) Various shapes are included, such as a rectangular shape, a circular shape, and a rectangular shape having the same length in the front and rear (up and down) left and right.

  The absorber 13 is wrapped with a core wrap (tissue) (not shown). The core wrap is a hydrophilic thin sheet. In addition, in this embodiment, although the absorber 13 wrapped with the core wrap is used, the absorber in the present invention may not be wrapped with the core wrap.

  And as FIG.5 and FIG.6 shows, the diaper 10 is the compression part formation area | region (embossing pattern formation area | region) N1 which gave the compression by regular embossing toward the absorber 13 from the top sheet 14 surface. Have. In the compression portion forming region N1, an emboss pattern that forms an oblique grid pattern as a whole is formed by the arrangement of the plurality of concave portions 21 and 23 by compression. Specifically, the recesses 23 (hereinafter also referred to as “first recesses” and “short recesses”) located at the intersections of the lattices, and the recesses 21 (hereinafter referred to as “second recesses”) between these recesses 23, (Also referred to as “long recess”). That is, a plurality of compressed rows 22 in which the concave portions 21 and the concave portions 23 are alternately arranged are formed, and a lattice-like emboss pattern extending obliquely is formed by the arrangement of the plurality of compressed rows 22. Although not shown in the drawing, the concave portion 21 is formed by compressing both the core wrap and the absorbent body 13 from the surface of the top sheet 14.

  The long concave portion 21 in the present embodiment is inclined with respect to an imaginary line P along the central axis of the wearer's body when the diaper is worn. Specifically, the long concave portion 21 has a predetermined angle α with respect to the imaginary line P and a right-side long concave portion 21a inclined in the right direction in the drawing, which is the first direction, and a second angle at the predetermined angle β. A leftward long concave portion 21b inclined in the middle left direction is provided. And as FIG. 7 shows, the long recessed part 21 and the short recessed part 23 which inclined in the same direction are arrange | positioned so that the row | line | column may be formed alternately with the predetermined space | interval L1.

  As shown in FIG. 5, a row in which the rightward long concave portions 21a are arranged is referred to as a first compression row 22a, and a row in which the leftward long concave portions 21a are arranged is referred to as a second compression row 22b. These compression rows 22 are linearly inclined with respect to the virtual line P at the same angle as the inclination angle of the long recess 21. Further, the plurality of first compression rows 22a are arranged in parallel with a space S1 therebetween. The plurality of second compression rows 22b are arranged in parallel with an interval S2. Then, the intervals S1 and S2 of the rows 22 and the interval L1 of the arrangement of the recesses 21 and 23 are determined so that the short recesses 23 are located at the intersections of the first compression row 22a and the second compression row 22b. Yes. Thus, by arranging the plurality of first compression rows 22a and the second compression rows 22b, an oblique grid-like emboss pattern in which the short recesses 23 are located at the intersections is formed. In the present embodiment, the intervals S1 and S2 are the same value, but they may be different values.

  As can be understood from FIGS. 5 and 6, one square of the lattice has the following configuration. Four sides are formed by each long recess 21, and four vertices are formed by short recesses 23. Here, the length of the long concave portion 21 is shorter than the distances S1 and S2. As shown in FIG. 5, in the lattice, the right long concave portion 21a and the left long concave portion 21b do not overlap.

  As shown in FIG. 5, the emboss pattern is not formed on both ends of the absorber 13. Therefore, the absorber 13 is one in which the compression part non-formation area (emboss pattern non-formation area) N2 is located on both sides of the compression part formation area (emboss pattern formation area) N1. This is to prevent body fluid from leaking from the leg opening 10L through the emboss pattern.

  7 is an enlarged schematic view of the vicinity of the intersection of the compression rows in FIG. 6, and FIG. 8 is a diagram showing a cross section taken along line VIII-VIII in FIG. FIG. 9 is a view showing a cross section taken along line IX-IX in FIG.

  As shown in FIG. 7, a region indicated by a broken line surrounding the long concave portion 21 and the short concave portion 23 is a semi-compressed region 24. That is, by strongly compressing the top sheet 14 and the absorber 13 to form the long recess 21 and the short recess 23, the top sheet 14 and the absorber 13 around the long recess 21 and the short recess 23 are pulled. Will be compressed. Thus, the weakly compressed region around the recess, which is a region strongly compressed by the embossing mold, is referred to as a semi-compressed region 24. Therefore, the area where the absorber 13 and the like are compressed, that is, the compressed area becomes the concave portions 21 and 23 and the semi-compressed area 24 around them. And the area | regions other than these compression area | regions in absorber 13 grade | etc., Are not compressed but become an uncompressed area | region. That is, the intersection neighboring portion 26 located between the short concave portion 23 and the long concave portion 21 which are the intersection points of the lattice, and the main absorption region 25 which is the inside of the lattice are non-compressed regions.

  As shown in FIGS. 8 and 9, the main absorption region 25 that is an uncompressed region and the intersection vicinity portion 26 have the same thickness (height) of the absorber 13 and the like. On the other hand, in the long concave portion 21 and the short concave portion 23, the absorber 13 and the like are compressed, and are recessed compared to the non-compressed region. A portion where the non-compressed region and the concave portions 21 and 23 are connected and the thickness of the absorber 13 gradually changes is a semi-compressed region 24.

  Next, the shape of each recess will be specifically described.

  As shown in FIGS. 7 and 8, the long concave portion 21 is intermittently disposed in the first long concave portion 211 and the first long concave portion 211 that forms the outer shape thereof. And a circular long concave second portion 212 that is further deeply recessed. As shown in FIG. 7, the long concave portion first portion 211 is an elongated one having a length U and a width V shorter than the lengths S1 and S2 of the lattice sides. Specifically, it has a shape in which both ends are arcs. And in the inside of the long recessed part 1st part 211, the circular long recessed part 2nd part 212 is arrange | positioned so that it may become alternate at predetermined intervals with respect to the longitudinal direction central axis. The long concave portion second portion 212 is deeper than the long concave portion first portion 211 in the thickness direction of the absorber.

  As shown in FIG. 8, in the long concave portion 21, the long concave second portion 212 is located at the deepest point, and the long concave first portion 211 is located slightly above the bottom of the long concave second portion 212. To do. This is the difference obtained by subtracting Q2 from Q1, where Q1 is the deepest position of the long concave portion 21, that is, the depth to the bottom of the long concave second portion 212 is Q1, and Q2 is the depth to the bottom of the long concave first portion 211. Q3 is about 3.5 to 15% of the depth Q1 to the bottom of the long concave portion second portion 212. And if the thickness which consists of the absorber 13 and the top sheet 14 in an uncompressed area | region is set to Q4, the depth Q1 to the bottom of the long recessed part 2nd part 212 will be about 42.5 to 97.5% of thickness Q4. is there. And the depth Q2 to the bottom of the long recessed part 1st part 211 is about 37.5%-95.0% of thickness Q4. Thus, the long concave portion 21 in the present embodiment is formed by compressing the absorber 13 to a considerable depth. And it has the shape which has the depth of two steps.

  On the other hand, as shown in FIG. 9, the short recesses 23 located at the intersections of the lattices are formed by compressing the absorber 13 and the like by the same depth Q2 as the long recess first part 211.

  The embossing to form the long recesses 21 and the short recesses 23 compresses the top sheet 14 and the absorber 13 together from the surface of the top sheet 14 with an adhesive interposed between the top sheet 14 and the absorber 13. It is. The long concave portion 21 and the short concave portion 23 are formed by compressing the top sheet 14 and the absorber 13 together from the surface of the top sheet 14 by a predetermined mold formed on the embossing roll.

  And in the long recessed part 21, the long recessed part 2nd part 212 is a small circle, The area is small. Therefore, in the pressing by the embossing roll, the pressure concentrates on the long concave portion second portion 212, and the absorber 13 and the top sheet 14 are strongly compressed. During the compression, the pulp fibers of the absorbent body 13 and the fibers of the top sheet 14 are firmly entangled and joined together. Next, the same pressing force is applied to the long concave portion first portion 211 during compression, but the pressure is not concentrated as much as the long concave portion second portion 212 because of the large area. For this reason, the bonding between the absorbent body 13 and the top sheet 14 is slightly weaker than that of the second long concave portion 212, but is sufficient to form the concave shape. As described above, the absorbent body 13 is strongly compressed in the second long concave portion 212, and the shape of the long concave portion 21 is maintained by firmly joining the absorbent body 13 and the top sheet 14. For example, even when the wearer sits down and pressure due to the weight of the wearer is applied to the surface of the absorbent body 13, the long concave portion 21 maintains its shape without sagging. And even if the diaper 10 is pulled strongly by various movements of the legs, the top sheet 14 and the absorber 13 are firmly joined, and the long recess 21 maintains its shape. Here, it is also conceivable to form the entire long concave portion 21 by applying a strong compressive force instead of the two-stage structure of the long concave portion first portion 211 and the long concave portion second portion 212. That is, in the embossing, a surface having a flat surface is used instead of using a mold in which a round protrusion corresponding to the long concave portion second portion 212 is further protruded inside the substantially elliptical protrusion corresponding to the long concave portion first portion 211. It is also conceivable to compress using a mold having only a substantially elliptical projection. However, in such a mold, a portion where pressure is concentrated is not formed, and therefore, a portion where the fibers of the surface sheet and the absorbent body are strongly entangled cannot be created unless pressure is applied as a whole. As a result, the necessary pressing force becomes very strong, and the top sheet 14 may be torn. Moreover, it is difficult to form the long concave portion 21 that can withstand the weight of the wearer and various movements by compression with a weak pressing force as a whole. In the present embodiment, the embossing mold is provided with a protrusion corresponding to the long concave second portion 212, and is partially strongly compressed to create a portion where the top sheet 14 and the absorber 13 are firmly joined. This prevents the occurrence of defects such as the top sheet 14 being torn during manufacture. Depending on the strength and the amount of compression of the top sheet 14, the compression row may be formed by a configuration in which dot-like recesses are arranged intermittently without using such a two-stage compression structure.

  Furthermore, the short recessed part 23 provided in the intersection of a grating | lattice is formed because the absorber 13 is pressed and compressed to the same extent as the 1st long recessed part 211 by this embossing roll, as mentioned above. The strength of the pressing is such a strength that the top sheet 14 and the absorber 13 can be integrally joined without breaking the top sheet 14.

  As shown in FIGS. 8 and 9, in the absorbent body 13, the bottom surface portion of the long recess second portion 212 is a high-density section 13 </ b> A in which the density of the absorbent body is highest. And the uncompressed area | regions, such as the main absorption area | region 25 and the intersection vicinity part 26, are the low density parts 13D with the lowest density of an absorber. And the bottom face part of the long recessed part 1st part 211 and the short recessed part 23 bottom part are the medium density parts 13B. The semi-compressed region 24 becomes a density changing portion 13C in which the density gradually decreases toward the non-compressed region.

  Here, as described above, the absorbent body 13 is mainly made of SAP and pulp, and the density mainly involves the pulp fiber density. Therefore, the high density portion 13A is in a state where the pulp is compressed and there are few gaps between the pulps, while the low density portion 13D is in a state where there are more gaps between the pulps than in the high density portion 13A.

  In addition, since the concave portions 21 and 23 are formed by compressing and joining the top sheet 14 that is a synthetic fiber and the absorbent body 13 of the pulp as a main component, the bottom surfaces of the concave portions 21 and 23 are film-like. It seems to absorb little liquid. Therefore, the body fluid discharged onto the recesses 21 and 23 is absorbed by the density changing portion 13 </ b> C that is the side wall of the recesses 21 and 23 and is sent to the main absorption region 25.

  As described above, in the present embodiment, when forming the compression row 22, the recesses 21 and 23 are intermittently arranged instead of the continuous recesses. In particular, a short recess 23 is provided at the intersection of the diagonal lattice, and the next long recess 21 is positioned away from the intersection. The reason for providing the interval L1 in this way will be described below.

  As described above, the compressed lattice 22 of the diagonal lattice is formed by pressing the embossing roll formed on the surface with the mold matched to the concave portions 21 and 23 while rotating. As shown in FIG. 6, when the embossing roll rotates and advances in the direction of arrow W, all the long concave portions 21 arranged in the direction orthogonal to the advancing direction W of the embossing roll (direction parallel to the rotation axis) are all simultaneously. It will be pressed. In the present embodiment, the size of the embossing roll is determined so that the circumference of the embossing roll corresponds to the length of the absorbent body 13 in the longitudinal direction, but is not limited thereto.

  In addition, in this embodiment, the advancing direction W of an embossing roll is a direction orthogonal to the rotating shaft of an embossing roll, and when the diaper 10 is completed, it is parallel to the direction used as the previous virtual line P. As described above, after the top sheet 14 and the absorbent body 13 are both compressed with an embossing roll, other necessary sheets or the like are laminated and cut into the size of the diaper 10. Since the cutting is performed with a length extending from the front body, the crotch, and the back body of the diaper 10, the traveling direction W of the embossing roll is also parallel to the virtual line P, so that the diagonal lattice shape is inclined with respect to the virtual line P. Can be formed.

  Therefore, the rightward long concave portion 21a is inclined in the rightward direction with respect to the traveling direction W, and the leftward long concave portion 21b is inclined in the leftward direction. For this reason, as the embossing roll advances in the traveling direction W, the distance between the right-side long concave portion 21a and the left-side long concave portion 21b adjacent to the intersecting portion 23 becomes shorter.

  Here, the top sheet 14 is drawn into the recesses 21 and 23 when the embossing rolls forming the recesses 21 and 23 are pressed. In particular, since the long concave portion 21 has the right long concave portion 21a and the left long concave portion 21b arranged adjacent to each other, the top sheet 14 is drawn from the left and right at the same time when these are formed. That is, in FIG. 6, the pulling force indicated by the arrow A is applied to the left and right simultaneously, and the top sheet 14 is pulled. As the distance between the adjacent right-facing recess 21a and left-facing recess 21b becomes shorter, the margin for the pull of the pull-in force A of the top sheet 14 decreases, so the top sheet 14 becomes tightly stretched.

  For example, assuming that a grid having the same size is formed in such a manner that the right-side long concave portion 21a and the left-side long concave portion 21b are joined at the intersection of the grid without leaving the interval L1, the grid faces rightward in the vicinity of the corner of the grid. The long recess 21a and the left-facing long recess 21b are arranged very close to each other. Then, in the vicinity of the intersection, the absorbent body 13 itself has a high density and is in a hard state, and the absorbent body 13 is strongly stretched by the pulling force of the adjacent left and right long concave portions 21a and 21b. It will be in contact with. In the main absorption region 25 in the vicinity of the intersection, the SAP in the absorbent body 13 hits the top sheet 14 and has a rough feel. This is not preferable because it is irritating to the wearer's skin.

  Therefore, in this embodiment, the intersection vicinity part 26 in which the distance between the adjacent long recesses 21 is less than the predetermined distance T is not compressed, and the top sheet 14 is not tightly stretched. That is, the compression of the absorbent body 13 and the joining of the absorbent body 13 and the top sheet 14 are stopped to the extent that the top sheet 14 in the main absorbent region 25 can be maintained with a margin. Thereby, it is suppressed that the rough feel and the corner | angular part of a grating | lattice by SAP are hardened.

  That is, as shown in FIGS. 6 and 7, the shortest distance between the rightward long concave portion 21a and the leftward long concave portion 21b is T, and the long concave portion 21 is formed only in a portion where the distance between the two is T or more. Yes. Therefore, the top sheet 14 is fixed in a soft state, and a hard hand can be avoided. In the figure, the distance T is shown in a direction perpendicular to the traveling direction W. However, in the direction parallel to the traveling direction W, there is a problem that the corner portion becomes hard. It is preferable to form each long recessed part 21 apart. In the present embodiment, since the lengths of the right-side long concave portion 21a and the left-side long concave portion 21b are made equal and the formation interval L1 is also made equal, each length is also separated by a distance T or more in the direction parallel to the traveling direction W. A recess 21 is formed.

  In other words, when determining the emboss pattern, the distance between the adjacent recesses is T or more in the direction parallel to the diagonal of the quadrilateral (mass) defined by the first compression row 22a and the second compression row 22b. Thus, the arrangement interval of the long concave portions 21 is determined.

  Note that, as described above, the pull-in force A acts strongly in the direction orthogonal to the traveling direction W of the embossing roll, so that the diagonal line parallel to the traveling direction W of the embossing roll is adjacent to the concave portion. Even if the distance between them is slightly shorter than T, it can be said that the influence is small.

  For example, in this embodiment, T is about 7 mm when the thickness of the absorber is 8 mm and the depth of the first recess Q2 is 6 mm. This also varies depending on the relationship between the amount of SAP and the amount of pulp fibers in the absorbent body 13 and the thickness of the top sheet 14. An important point in the present invention is that when an emboss pattern having an oblique component such as an oblique lattice is used, an emboss pattern is not formed in a portion where the interval between adjacent recesses becomes narrow.

  On the other hand, since the lattice intersection itself is not close and pressed simultaneously from both the left and right sides, the top sheet 14 is not strongly pulled. In consideration of the tension of the top sheet 14, if the compression row 22 has an excessive interval that does not form the recesses, the compression row 22 may not be identified as a row, and the grid may not be recognized. Moreover, when the space | interval between the long recessed parts 21 is too wide, it will become difficult to exhibit the effect | action that the absorber 13 follows the motion of a body and it is easy to bend diagonally. Therefore, the concave portions 23 are provided at the intersections that do not affect the tension of the top sheet 14 to enhance the recognizability of the lattice and further improve the visual effect of the embossed pattern. Further, without making the corners of the lattice mass stiff, the absorber 13 follows the movement of the body and is easily bent.

  Thus, in this embodiment, the shortest distance between the adjacent recessed parts 21 is made not to be less than T. In other words, the embossed pattern in which the concave portions 21 are spaced apart by a distance T or more, that is, the vicinity 26 of the lattice intersection is an embossed pattern that is not embossed, thereby preventing the skin contact surface from becoming hard. And since the corners of the lattice are in a soft state similar to the main absorption region 25, even if an embossed pattern in the diagonal lattice shape is used, the corners of the lattice mass do not have a hard and pointed touch, and are soft to the wearer. Can give it a soft touch.

  Further, by providing a short recess 23 at the intersection of the first compression row 22a and the second compression row 22b, the intersection of the lattice (the apex of the mass) is clarified, and the aesthetics and the design are improved. In addition, the compression row 22 extending obliquely is prevented from being mistaken as a wrinkle caused by a manufacturing defect, an irregularly arranged concave portion, or the like. Moreover, it becomes easy to deform | transform also to the diagonal direction of the absorber 13 which followed the motion of the body.

  In this embodiment, the embossing is performed using an embossing roll. However, the embossing is not limited to this method, and embossing is performed in units of diaper size by a plate-like embossing plate that matches the size of the diaper. What you push may be used.

  Next, the details of the emboss pattern example by embossing will be described.

  As shown in FIG. 6, the embossed pattern of the present embodiment is such that the right-side long concave portion 21a and the short concave portions 23 positioned in the longitudinal direction of the right-side long concave portion 21a are spaced apart from each other by the first compression row. 22a is formed. Similarly, the left-side long concave portion 21a and the short concave portion 23 form the second compression row 22b with a space L1 therebetween. The first compressed columns 22a are arranged in a plurality of rows in parallel at an interval S1, and the second compressed columns 22b are arranged in a plurality of rows in parallel at an interval S2. The first compression row 22a and the second compression row 22b form an emboss pattern that forms an oblique lattice pattern in the distance as shown in FIG.

  In this embodiment, the lengths S1 and S2 of one side of the lattice are equal and 27.0 mm. The interval between the lattices is preferably 13.0 mm or more and 54.0 mm or less. The length U of the long concave portion 21 in the longitudinal direction is 19.0 mm, and the length U is preferably 55% to 85% of the lengths S1 and S2 of one side of the lattice. Further, the width V of the long recess 21 is 3.0 mm. The width V is preferably 2.0 mm or greater and 4.0 mm or less. Further, the width V1 of the short recess 23 is the same as or narrower than the width V of the long recess 21. The width V1 in this embodiment is 2.0 mm. The width V1 is preferably 1.0 mm or greater and 4.0 mm or less. Moreover, the space | interval L1 between the recessed parts 21 and 23 is 4.4 mm. The interval L1 is preferably 2.0 mm or greater and 6.0 mm or less. By setting it as such a relationship, except the intersection, the location where the distance T between the adjacent long recessed parts 21 will be less than 6.0 mm will have a recessed part.

  Moreover, in this embodiment, the thickness of the absorber 13 and the top sheet 14 before embossing is 8.0 mm, and the depth of the deepest portion of the long recess 21 is shown in FIG. Q1 is 7.8 mm. The depth Q2 of the next deepest portion is 7.5 mm. The thickness Q4 of the non-compressed region is 8.0 mm.

  In addition, as for the thickness of the absorber 13 and the top sheet 14 before embossing, 5.0 mm-20.0 mm are preferable. Moreover, as for the maximum depth Q1 of the part compressed by the recessed part 21, 3.0 mm-8.0 mm are preferable. The difference Q3 from the next deepest portion is preferably 0.1 mm to 0.5 mm. The thickness (height) Q4 of the non-compressed region is preferably 5.0 mm to 20.0 mm.

  By forming the recesses 21 and 23 at such depths and intervals, the groove can be maintained even when weight is added, and a soft touch is maintained on the skin contact surface of the crotch lower part of the diaper. can do. Therefore, the slanted grid-like embossed pattern can suppress deformation such as diaper swaying with respect to various movements of the legs, and the touch can be made soft to suppress irritation to the skin as much as possible.

  In the present embodiment, the outer shape of the long concave portion 21 is determined by the long and generally elliptical long concave first portion 211. However, the present invention is not limited to this, and an oblique grid-like compressed row is used. A plurality of dots or parallelogram-shaped concave portions may be intermittently arranged. That is, in the present embodiment, it is important to provide the intersection neighboring portion 26 that does not form the concave portion by a predetermined size, and the shape of the concave portion defined by the long concave portion 21 that constitutes each side of the lattice is It is not limited to the embodiment. The same effect can be obtained by arranging the plurality of dots as described above. Even in this case, the recesses are arranged so that the distance between adjacent recesses in the direction parallel to the diagonal of the lattice mass is T or more.

  In the present embodiment, one side of the mass may be formed by two or more long concave portions 21 whose length in the longitudinal direction is shortened instead of one long concave portion 21. Further, the arrangement of the long concave portion second portion 212 in the long concave portion first portion 211 is distributed to the outside in the width direction so as to be staggered. However, the present invention is not limited to this, and is arranged in a row in the center, etc. It can be anything. The shape of the second long concave portion 212 is not limited to the shape shown in the present embodiment, and may take various shapes such as a quadrangle, an ellipse, and a triangle.

  In the present embodiment, the short concave portion is a star shape with four vertices, but the present invention is not limited to this and may be a quadrilateral, a circle, or the like. That is, any shape may be used as long as it is an appropriate shape for recognizing the apex (corner) of the grid cell.

  The disposable diaper 10 of the present embodiment is applicable to both adults and children. Moreover, in this embodiment, although demonstrated using the underpants type diaper as an example, it cannot be overemphasized that it is applicable also to an unfolded type diaper (what is called a sheet type diaper). Moreover, the absorbent article of the present invention is not limited to diapers, but can be applied to other general absorbent articles such as an absorbent pad. For example, as shown in FIG. 5, the present invention can be applied to an absorbent pad or the like because of the structure of the absorbent body 13 and the top sheet 14, and has the same effects as a diaper.

DESCRIPTION OF SYMBOLS 10 Disposable diaper 10F Front body area | region 10R Rear body area | region 10C Crotch area | region 10W Waist circumference opening part 10L Leg circumference opening part 11 Cover sheet 11A Notch part 11B Inner cover sheet 11C Outer cover sheet 12 Back sheet (back surface sheet)
13 Absorbent body 14 Top sheet (surface sheet)
15 Thread rubber (thread rubber around the legs)
17 Thread rubber (waist around the waist)
18 Side sheet 21 Long recess (second recess)
21a Right long concave portion 21b Left long concave portion 211 Long concave portion first part (concave first portion)
212 Long recess 2nd part (recess 2nd part)
22 compression row 22a first compression row 22b second compression row 23 short recess (first recess)
24 Quasi-compression region 25 Main absorption region (inner region surrounded by the edges constituting the mass) (uncompressed region)
26 Near intersection (uncompressed region)
L1 Front-to-back spacing S1 between adjacent recesses in the compression row S1 Formation intervals S2 of the plurality of first compression rows T Formation intervals T of the plurality of second compression rows Shortest distance U between adjacent recesses Longitudinal length V of the long recesses Long recesses Length in the short direction (width)
V1 Short recess width

Claims (6)

A recess having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between the top sheet and the back sheet, and compressing the top sheet and the absorbent body An absorbent article having
When the absorbent article is worn, the concave portion is a lattice formed by a component that inclines from the abdomen side of the wearer to the crotch and that inclines to one side and a component that inclines to the other side with respect to the imaginary line leading to the back side. A first recess located at the intersection of the lattices, and a second recess located between the first recesses,
An absorbent article, wherein the space between the first recess and the second recess is an uncompressed region.   The absorbent article according to claim 1, wherein the top sheet and the absorbent body are integrally joined to the concave portion.   The absorbent article according to claim 1 or 2, wherein a distance between the adjacent second recesses is 6 mm or more in a direction parallel to a diagonal line in the grid mass.   The absorbent article according to any one of claims 1 to 3, wherein an interval of the lattice is 13 mm or more and 54 mm or less.   The absorbent article according to any one of claims 1 to 4, wherein the second recessed portion includes a recessed portion first portion and a recessed portion second portion further recessed in the recessed portion first portion.   The absorbent article according to any one of claims 1 to 5, wherein the absorbent body is a disposable diaper having a size extending over a front body, an inseam, and a back body.

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