JP6503877B2 - Absorbent articles - Google Patents

Description

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

  In absorbent articles such as disposable diapers (hereinafter, also simply referred to as "diapers"), various improvements have been made to improve the function and the feeling of wearing.

  Absorbent articles absorb most of the body fluid excreted by the absorber. Here, the diaper covers the belly, buttocks and crotch region, so it is affected by movements of various bodies, especially legs, such as walking and turning, baby's high and low. In particular, the absorber can be twisted, broken or broken by various movements of the body. As a result, the fit of the diaper into the crotch decreases, and the liquid tends to leak. Therefore, in order to maintain the fit, for example, as disclosed 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 absorber, the rigidity of the absorber is enhanced, and the absorber is less likely to be twisted against a force applied by the movement of the body, and is less likely to be broken.

  In addition, as seen in Patent Document 2, the skin contact surface side of the absorber is embossed by an oblique lattice-like compressed groove extending obliquely with respect to the direction from the front to the back of the diaper. There is also one.

  Moreover, such an embossing process is formed by rotationally moving the embossing roll which an embossing pattern protrudes on the surface on a elongate absorber sheet. At the time of diaper manufacture, after emboss roll was rotated and embossed on a long absorber sheet etc., various sheets were laminated | stacked etc. and it cut | disconnected to a required magnitude | size.

JP, 2014-69002, A JP, 2015-16218, A

  By the way, in order to prevent the grooves from falling even when pressure is applied by the weight of the wearer, the present inventor has taken from the surface sheet (top sheet) side disposed on the skin contact surface side of the absorber, The topsheet and the absorber were compressed together to form a less squeezed compressed groove. Also in this case, as described above, the compressed groove is formed by rotating the embossing roll on the absorber on which the surface sheet is laminated. Thus, when forming a compression groove, the surface sheet etc. located in the upper layer rather than an absorber will bite in toward a groove by the press of an embossing roll. In particular, in an embossed pattern having a component extending in an oblique direction, such as an oblique lattice, there is a portion where the distance between points to be simultaneously compressed becomes short (the interval becomes narrow), such as near a lattice point. If the distance between the points to be compressed simultaneously is short, the force to pull the surface sheet from both adjacent compression points works strongly, and the surface sheet is likely to be in a strong tension state.

  Since the compression groove itself is at a lower position compared to the point where it is not compressed, it does not touch the wearer's skin directly, but near the intersection point (grid point) of the grid, ie near the corners of the grid It is fixed in a stretched and pulled 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. Then, in the vicinity of the corners of the grid on the skin contact surface of the top sheet, the rough feeling of the highly absorbent resin is transmitted as the touch, and so on, which makes it harder than the other parts.

  Since the corners of this grid are at a higher position than the bottom of the compression groove, they touch the wearer's skin, giving the wearer a hard and stiff feel, which is not desirable. Since the absorbent article is in contact with delicate skin parts such as the crotch, a soft touch is required, and when the corner parts of the grid are hard, the touch to the skin is not desirable.

  On the other hand, since a surface sheet is a skin contact side of a wearer, it is a part which a wearer tends to observe at the time of wear etc. If the embossed pattern does not have much regularity or design, the cosmetic effect is low, and in some cases, the wearer may misidentify it as a wrinkle due to a manufacturing defect.

  The present invention compresses a visually excellent emboss pattern having a component extending in an oblique direction by compressing both the surface sheet and the absorber and forms a soft touch even in the vicinity of an intersection where the components extending in an oblique direction intersect. An object of the present invention is to provide an absorbent article to be provided to a wearer.

The absorbent article of the present invention has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, and the top sheet and the absorbent An absorbent article having a concave portion obtained by compressing a component, wherein the concave portion is a component that inclines to one side with respect to a virtual line extending from the ventral side of the wearer through the crotch when the absorbent article is worn And a component inclined to the other side, and having a first recess located at the intersection of the grating and a second recess located between the first recess, between the first recess and the second recess is an uncompressed region, the second recess, the recess and the first part, Ri Do from the further concave recess part 2 in the first portion recess, said absorbent to entire area under the second recess It is characterized by the fact that the body exists .

FIG. 1 is a perspective view showing the appearance of an embodiment in which the 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 developed and seen 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 of the diaper shown in FIG. FIG. 5: is the partial top view which looked at the absorber part of the diaper shown in FIG. 1 from the top sheet side. FIG. 6 is a schematic partial plan view showing the oblique grid-like embossed pattern portion in FIG. FIG. 7 is an enlarged partial plan view of a part of FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. FIG. 9 is a cross-sectional view taken along line IX-IX of FIG.

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

  In the appearance of the first embodiment in which the present invention is applied to a pants-type disposable diaper, a perspective view seen from the front side is shown in FIG. The unfolded diaper shown in FIG. 1 is shown in FIG. 2 as viewed from the skin contact surface side. The III-III line broken-out sectional view of Drawing 2 is shown in Drawing 3, and it is shown in Drawing 4 in the division state where the pants type disposable diaper shown in Drawings 1 and 2 was developed.

  A pants-type disposable diaper (hereinafter may be simply referred to as a diaper) 10 in the present embodiment has a front body region 10F, a back body region 10R, and a crotch region 10C connecting the front body region 10F and the back body region 10R. And. In addition, a waist-surrounding opening 10W is formed which surrounds a portion of the waist of the wearer by the front body region 10F and the back body region 10R when worn. Similarly, the front body region 10F and the lower end crotch region 10C of the rear body region 10R form a pair of left and right leg openings 10L surrounding the thighs of the legs of the wearer. Then, except for the left and right leg openings 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 located on the ventral side of the wearer, and the back body region 10R is located on the dorsal side of the wearer. The crotch region 10C covers the wearer's crotch, and the wearer's legs are respectively passed through the left and right pair of leg openings 10L. Therefore, the leg-surrounding opening 10L is located anywhere from the base to the thigh of the wearer's legs.

  The imaginary line P extends from the ventral side to the dorsal side in the diaper central portion through the crotch portion. Specifically, for example, when the waist side of the diaper is on the upper side and the crotch side is on the lower side, the imaginary line P extends along the diaper surface in the vertical direction and also via the crotch portion on the back side It extends vertically. In other words, the vertical direction is a direction along the central axis of the body from the head to the crotch of the wearer, and the imaginary line P extends along the central axis of the body.

  As FIG.3 and FIG.4 shows, the diapar 10 in this embodiment piles up the cover sheet 11, the back sheet 12, the absorber 13, and the top sheet 14 which touches a wearer's skin in order from the outer side in order Jointed together. On the left and right sides of the crotch region 10C of the cover sheet 11, a pair of semicircular arc-shaped notches 11A that form the opening 10L around the legs are formed. The liquid-impermeable back sheet 12 is joined to the inner cover sheet 11B, and the above-mentioned absorbent 13 is disposed between the back sheet 12 and the liquid-permeable top sheet 14. The top sheet 14 is joined to the back sheet 12 via the same. Between the outer cover sheet 11C and the inner cover sheet 11B which are formed of thin non-woven fabric to obtain a good touch, a thread rubber 15 for forming a gather around the leg and a yarn for forming a gather around the waist The rubber 17 is joined in an extended state.

  Liquid impermeable side sheets 18 are joined to the left and right side edges of the liquid permeable top sheet 14 in the present embodiment, and solid gathers are formed at the inner end edges of the left and right side sheets 18. Rubber 19 is joined in a stretched state. Then, the side sheet 14 is drawn in the longitudinal direction by the expansion and contraction of the rubber thread 19, and as shown in FIG. 3, it becomes a solid gather with the inner end edge rising.

  In the diaper 10 in the present embodiment, the absorber 13 is elongated along the imaginary line P, and the longitudinal direction is parallel to the imaginary line P. Then, the direction orthogonal to the virtual line P is taken as the 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 suitably changed according to a wearer's body type.

  Next, the structure of the absorber portion in the present embodiment will be described.

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

  The absorber 13 of the present embodiment located below the top sheet 14 is mainly composed of pulp and a super absorbent resin (Super Absorbent Polymer, hereinafter also referred to as “SAP”). The absorber 13 has an elongated shape so as to extend over the front, crotch, and back. The front body part M1, the crotch part M2, and the rear body part M3 are divided into three. The crotch portion M2 is formed with a pair of arc-shaped notches 13a in accordance with the pair of left and right leg openings 10L surrounding the thighs of both legs. The notch 13 a may not be formed in accordance with the size of the absorber 13. Moreover, although the absorber 13 of this embodiment is provided with the notch part 13a and the width of a center part is an hourglass type whose width is narrower than front and rear ends, the shape of the absorber of the present invention is Not exclusively. Assuming that the front and back body parts are in the front and back (up and down) direction, and the direction orthogonal to it is the left and right directions, for example, the corners of the front and back (up and down) edges are dropped round It includes various shapes such as circular ones, rectangular ones with the same length in front and rear (upper and lower), and the like.

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

  And as FIG.5 and FIG.6 shows, the diapar 10 made the compression part formation area (emboss pattern formation area) N1 which performed compression by regular embossing toward the absorber 13 from the surface of the top sheet 14 Have. In the compression portion forming area N1, an emboss pattern is formed as an oblique lattice pattern as a whole by the arrangement of the plurality of concave portions 21 and 23 by compression. Specifically, the recess 23 (hereinafter also referred to as “first recess” or “short recess”) located at the intersection of the grid and the recess 21 (hereinafter “second recess”) located between the recesses 23 (Also referred to as “long recess”). That is, a plurality of compression rows 22 in which the recesses 21 and the recesses 23 are alternately arranged is formed, and the arrangement of the plurality of compression rows 22 forms a grid-like embossed pattern extending diagonally. Although not shown in the drawings, the recess 21 is formed by compressing the core wrap and the absorbent 13 together from the surface of the top sheet 14.

  The long recess 21 in the present embodiment is inclined with respect to an imaginary line P along the central axis of the body of the wearer when the diaper is worn. Specifically, with respect to the imaginary line P, the long concave portion 21 is a predetermined angle α and a rightward long concave portion 21a inclined in the right direction in the figure, which is the first direction, and a predetermined angle β and a second direction. A left facing long concave portion 21b inclined to the middle left direction is provided. Further, as shown in FIG. 7, the long recesses 21 and the short recesses 23 which are inclined in the same direction are alternately arranged to form a row with a predetermined interval L1.

  As shown in FIG. 5, a row in which the long concave portions 21a facing the right side are arranged is referred to as a first compression row 22a, and a row in which the long concave portions 21a facing the left are arranged is referred to as a second compression row 22b. These compression rows 22 are linear with respect to the imaginary line P and inclined at the same angle as the inclination angle of the long recess 21. Furthermore, the plurality of first compression trains 22a are arranged in parallel at an interval S1. In addition, the plurality of second compression rows 22b are arranged in parallel at an interval S2 from each other. Then, the spacings S1 and S2 of each row 22 and the spacing L1 of the alignment of the concave portions 21 and 23 are determined such that the short concave portions 23 are located at the intersections of the first compression row 22a and the second compression row 22b. There is. Thus, by arranging the plurality of first compression rows 22a and the second compression rows 22b, an oblique grid-like embossed pattern in which the short recesses 23 are located at the intersections is formed. In the present embodiment, the intervals S1 and S2 have the same value, but the two may have different values.

  And, as understood from FIGS. 5 and 6, one mass (mass) of the lattice has the following configuration. The four sides are formed by the respective long recesses 21, and the four apexes are formed by the short recesses 23. Here, the length of the long recess 21 is shorter than the above-mentioned intervals S1 and S2. As shown in FIG. 5, in the grid, the right facing long recess 21a and the left facing long recess 21b do not overlap.

  As shown in FIG. 5, the embossed pattern is not formed at both ends of the absorber 13. Therefore, in the absorbent body 13, the non-compressed portion forming region (emboss pattern non-forming region) N2 is located on both sides of the compressed portion forming region (emboss pattern forming region) N1. This is to prevent body fluid from leaking through the leg opening 10L along the embossed pattern.

  7 is a schematic view enlarging the vicinity of the intersection of the compression row in FIG. 6, and FIG. 8 is a view showing a cross section taken along line VIII-VIII in FIG. FIG. 9 is a cross-sectional view taken along line IX-IX of FIG.

  As shown in FIG. 7, a region indicated by a broken line surrounding the periphery of the long recess 21 and the short recess 23 is a quasi-compression 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, a weakly compressed area around the recess, which is an area strongly compressed by the embossing die, is referred to as a quasi-compressed area 24. Therefore, the area where the absorber 13 or the like is compressed, that is, the compressed area becomes the respective recessed portions 21 and 23 and the quasi-compressed area 24 therearound. And area | regions other than these compression area | regions in absorber 13 grade | etc., Are not compressed, but turn into non-compression area | region. That is, the intersection vicinity portion 26 located between the short recess 23 and the long recess 21 which are intersections of the grid and the main absorption region 25 which is the inside of the lattice are non-compression regions.

  As shown in FIG. 8 and FIG. 9, the thickness (height) of the absorber 13 etc. is the same as the non-compressed region main absorption region 25 and the intersection vicinity part 26. On the other hand, in the long recess 21 and the short recess 23, the absorber 13 and the like are compressed, and are recessed as compared with the non-compression region. Then, the non-compressed area and the recesses 21 and 23 are connected to each other, and a portion where the thickness of the absorber 13 gradually changes is a semi-compressed area 24.

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

  As shown in FIGS. 7 and 8, the long recess 21 is intermittently disposed in the long recess first portion 211 forming the outer shape thereof and the first long recess 211, and the long recess first portion 211 Also, it is composed of a circular long concave second portion 212 which is further recessed deeply. As shown in FIG. 7, the long concave first portion 211 is a long one having a length U and a width V, which are shorter than the side lengths S1 and S2 of the lattice. Specifically, it has a shape whose both ends are arcs. And in the inside of the long concave first portion 211, circular long concave second portions 212 are alternately arranged at predetermined intervals with respect to the longitudinal central axis. The long concave second portion 212 is deeper than the long concave first portion 211 in the thickness direction of the absorber.

  As shown in FIG. 8, in the long recess 21, the long recess second portion 212 is located at the deepest point, and the long recess first portion 211 is located at a position slightly elevated from the bottom of the long recess second portion 212. Do. Assuming that the deepest position of the long recess 21, that is, the depth to the bottom of the long recess second portion 212 is Q1 and the depth to the bottom of the long recess first portion 211 is Q2, the difference between Q1 and Q2 Q3 is about 3.5 to 15% of the depth Q1 to the bottom of the long concave second portion 212. And let Q4 be the thickness of the absorber 13 and the top sheet 14 in the non-compression region, and the depth Q1 to the bottom of the long concave second portion 212 is about 42.5% to 97.5% of the thickness Q4. is there. And depth Q2 to the bottom of long crevice 1st part 211 is about 37.5%-95.0% of thickness Q4. As described above, the long recess 21 in the present embodiment is formed by compressing the absorber 13 to a considerable depth. And it becomes a shape which has two steps of depth.

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

  Embossing which forms the long recess 21 and the short recess 23 interposes an adhesive between the top sheet 14 and the absorber 13 to compress the top sheet 14 and the absorber 13 together from the surface of the top sheet 14 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 die formed on the emboss roll.

  And in the long recessed part 21, the long recessed part 2nd part 212 is a small circle, and the area is small. Therefore, in the pressing by the embossing roll, the pressure is concentrated on the long concave second portion 212, and the absorber 13 and the top sheet 14 are strongly compressed. During this compression, the pulp fibers of the absorbent body 13 and the fibers of the top sheet 14 are firmly entangled, and they are joined together in an integrated manner. Next, the same pressing force is applied to the long recess first portion 211 during compression, but the pressure is not concentrated as much as the long recess second portion 212 because the area is wide. For this reason, although joining of the absorber 13 and the top sheet 14 is slightly weak compared with the long concave second portion 212, it is sufficient to form the concave shape. Thus, while the absorber 13 is strongly compressed in the long recess second portion 212 and the absorber 13 and the top sheet 14 are firmly joined, the shape of the long recess 21 is maintained. For example, even when pressure is applied to the surface of the absorbent body 13 by the weight of the wearer, for example, when the wearer is seated, the long concave portion 21 maintains its shape without denting. 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 concave portion 21 maintains its shape. Here, instead of the two-step structure of the long recess first portion 211 and the long recess second portion 212, it may be considered to apply a strong compressive force to the entire long recess 21. That is, in embossing, the surface is flat instead of using a mold in which a round projection fitted to the long recess second part 212 is further projected inside the substantially elliptical protrusion fitted to the long recess first part 211 It is also conceivable to use a mold having only a substantially elliptical protrusion for compression. However, in such a mold, no place where pressure is concentrated is created, so if no pressure is applied overall, it is not possible to create a place where the fibers of the top sheet and the absorbent body are strongly entangled. As a result, the required pressing force becomes very strong, and the top sheet 14 may be torn. Moreover, it is difficult to form the long recessed part 21 which can bear a wearer's weight and various motions by compression with weak pressure on the whole. In this embodiment, a projection corresponding to the long concave second portion 212 is provided in the embossing die, and by partially strongly compressing, a place where the top sheet 14 and the absorber 13 are firmly joined is made. The occurrence of defects such as breakage of the top sheet 14 at the time of manufacture is prevented. Note that, depending on the strength and compression amount of the top sheet 14, the compression row may be formed by a configuration in which dot-shaped concave portions are intermittently arranged without using such a two-stage compression structure.

  Furthermore, as described above, the short recesses 23 provided at the intersections of the grids are formed by the absorber 13 being pressed and compressed by the same extent as the long recess first portion 211 by the emboss roll. The strength of this pressing is such a strength that an integral bonding of the top sheet 14 and the absorber 13 is realized without the top sheet 14 being broken.

  As shown in FIGS. 8 and 9, in the absorber 13, the bottom portion of the long concave second portion 212 is the high density portion 13 </ b> A in which the density of the absorber is the highest. And the non-compression area such as the main absorption area 25 and the intersection neighborhood area 26 is the low density area 13D where the density of the absorber is the lowest. The bottom surface portion of the long concave first portion 211 and the bottom of the short concave portion 23 are the medium density portion 13B. The quasi-compression region 24 becomes a density change portion 13C in which the density gradually decreases toward the non-compression region.

  Here, as described above, the absorber 13 is mainly composed of SAP and pulp, and the density mainly relates to the pulp fiber density. Therefore, while the high density portion 13A compresses the pulp and the gap between the pulps is small, the low density portion 13D has a large number of gaps between the pulp as compared to the high density portion 13A.

  In addition, since the concave portions 21 and 23 are formed by compression bonding of the top sheet 14 which is a synthetic fiber and the absorbent 13 of the main component together, the bottom surfaces of the concave portions 21 and 23 become a film. Appear to absorb little fluid. Therefore, the body fluid discharged onto the recessed portions 21 and 23 is absorbed by the density changing portion 13C which is the side wall of the recessed portions 21 and 23 and is sent to the main absorption region 25.

  As described above, in the present embodiment, when the compression row 22 is formed, the recesses 21 and 23 are intermittently arranged and formed instead of being formed as a continuous recess. In particular, a short recess 23 is provided at the intersection of the oblique grids, and the next long recess 21 is located away from the intersection. The reason for providing the interval L1 as described above will be described below.

  As described above, the compression row 22 of the oblique grid is formed by pressing the rotating embossing roll whose surface is formed with a mold in accordance with each of the recesses 21 and 23. As shown in FIG. 6, when the emboss roll rotates and advances in the direction of arrow W, all the long concave portions 21 aligned in the direction orthogonal to the advancing direction W of the emboss roll (direction parallel to the rotation axis) It will be pressed. In the present embodiment, the size of the emboss roll is determined so that the circumference of the emboss roll corresponds to the length of the absorber 13 in the longitudinal direction, but the invention is not limited thereto.

  In the present embodiment, the advancing direction W of the emboss roll is a direction perpendicular to the rotation axis of the emboss roll, and is parallel to the direction of the virtual line P when the diaper 10 is completed. As described above, after the top sheet 14 and the absorbent body 13 are both compressed by the emboss roll, the sheet is cut into the size of the diaper 10 by laminating other necessary sheets and the like. Since the cutting is performed with a length extending over the front, the crotch, and the back of the diaper 10, the advancing direction W of the embossing roll is also parallel to the virtual line P, thereby forming a diagonal grid inclined with respect to the virtual line P. Can form an embossed pattern.

  Therefore, the right-facing long recess 21a is also inclined to the right with respect to the traveling direction W, and the left-facing long recess 21b is inclined to the left. For this reason, as the emboss roll advances in the advancing direction W, the distance between the right long concave 21a and the left long concave 21b adjacent to the intersection 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, in the long recess 21, since the right facing long recess 21 a and the left facing long recess 21 b are disposed adjacent to each other, the top sheet 14 is drawn from the left and right simultaneously when forming these. That is, in FIG. 6, the pull-in force indicated by the arrow A is simultaneously applied to the left and right, and the top sheet 14 is pulled. The shorter the distance between the adjacent right facing recess 21a and the left facing recess 21b, the smaller the margin for the pulling of the pull-in force A of the top sheet 14, and therefore the top sheet 14 is in a strongly stretched state.

  For example, assuming that the right facing long recess 21a and the left facing long recess 21b are formed to be joined at the intersection of the grid without opening the gap L1 when making the grid of the same size, the right facing 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 density of the absorbent body 13 itself is high, and in addition to the hard state, the absorbent body 13 is in a state where the top sheet 14 is strongly stretched by the drawing force of the adjacent left and right long concave portions 21a and 21b. It will be in contact with In the main absorbent region 25 near the intersection, the SAP in the absorbent body 13 hits the top sheet 14 and has a rough touch. This is not preferable because it causes irritation to the wearer's skin.

  Therefore, in the present embodiment, the intersection vicinity portion 26 in which the distance between the adjacent long concave portions 21 is less than the predetermined distance T is not compressed, and the top sheet 14 is kept in a strongly stretched state. That is, the compression of the absorbent 13 and the bonding of the absorbent 13 and the top sheet 14 are limited to the extent that the top sheet 14 in the main absorbent region 25 can be maintained with a margin. This suppresses the stiffness of the SAP and the hardening of the corner of the grid.

  That is, as shown in FIG. 6 and FIG. 7, the shortest distance between the right facing long recess 21a and the left facing long recess 21b is T, and the long recess 21 is formed only in a portion where the distance between them is T or more. There is. Therefore, the top sheet 14 is fixed in a soft state, and a hard touch can be avoided. In the drawing, the distance T is described in the direction orthogonal to the traveling direction W. However, even in the direction parallel to the traveling direction W, a problem due to the corner portion becoming hard occurs. Preferably, the long recesses 21 are formed separately. In the present embodiment, the lengths of the right long concave 21a and the left long concave 21b are equalized, and the formation interval L1 is also equal. The recess 21 is to be 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) divided by the first compression row 22a and the second compression row 22b. The arrangement intervals of the long recesses 21 are determined so that

  As described above, since the pull-in force A acts strongly in the direction orthogonal to the advancing direction W of the embossing roll, the adjacent recesses are adjacent to each other with respect to the diagonal line parallel to the advancing direction W of the embossing roll. Even if the distance between them is slightly shorter than T, the effect is small.

  This T is, for example, about 7 mm when the thickness of the absorber is 8 mm and the depth of the first recess Q 2 is 6 mm in the present embodiment. This also changes depending on the relationship between the amount of SAP in the absorbent 13 and the amount of pulp fiber, and the thickness of the top sheet 14. The important point in the present invention is that when using an embossed pattern having oblique components such as oblique grids, the embossed pattern is not formed in a portion where the distance between adjacent concaves becomes narrow.

  On the other hand, the top sheet 14 will not be pulled strongly because the grid intersections themselves are not places where they are pressed close simultaneously from both left and right. In view of the tension of the top sheet 14, if the interval which does not form a recess is too wide in the compression row 22, the compression row 22 may not be identified as a row, and a grid may not be recognized. In addition, when the distance between the long concave portions 21 is too large, it becomes difficult to exert the effect that the absorber 13 easily bends obliquely following the movement of the body. Therefore, concaves 23 are provided at the intersections that do not affect the tension of the top sheet 14 to enhance the grid recognition and further improve the visual effect of the embossed pattern. In addition, the absorber 13 follows the movement of the body and is easily bent without making the corners of the lattice mass rigid.

  As described above, in the present embodiment, the shortest distance between adjacent concave portions 21 is prevented from being less than T. That is, by setting the emboss pattern in which the concave portions 21 are separated by the distance T or more, that is, the neighborhood 26 of the intersections of the grids with the emboss pattern which is not embossed, the skin contact surface is prevented from becoming hard. And since the corners of the grid are in a soft state as in the main absorption region 25, even if the embossed pattern in the diagonal grid shape is used, the corners of the grid mass do not have a hard and sharp touch, and are soft to the wearer. And can give a touch.

  Further, by providing the short recesses 23 at the intersections of the first compression train 22a and the second compression train 22b, the intersections of the grids (the apexes of the mass) are made clear to improve the appearance and design. In addition, this obliquely extending compression row 22 is not mistaken for wrinkles due to manufacturing defects or irregularly arranged recesses and 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 the present embodiment, the embossing has been described using an embossing roll, but the embossing is not limited to this method, and embossing is performed in the size unit of the diaper by a plate-like embossing plate according to the size of the diaper. It may be something like pushing.

  Next, details of the embossed pattern embodiment by embossing will be described.

  As shown in FIG. 6, in the emboss pattern of the present embodiment, the first compression row has the right long concave portion 21a and the short concave portions 23 located before and after the longitudinal direction of the right long concave portion 21a spaced apart from each other by a distance L1. Form 22a. Similarly, the left long concave portion 21a also forms the second compressed row 22b with the short concave portion 23 and the space L1. A plurality of first compression rows 22a are arranged in parallel at an interval S1, and a plurality of second compression rows 22b are arranged in parallel at an interval S2. Then, as shown in the figure, an embossed pattern which is in the form of a diagonal lattice in the far field is formed by the first compression row 22a and the second compression row 22b.

  The lengths S1 and S2 of one side of the grid in this embodiment are equal to 27.0 mm. The distance between the grids is preferably 13.0 mm to 54.0 mm. The length U in the longitudinal direction of the long recess 21 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. Moreover, the width V of the long recess 21 is 3.0 mm. The width V is preferably 2.0 mm or more and 4.0 mm or less. Further, the width V1 of the short recess 23 is equal to or narrower than the width V of the long recess 21. The width V1 in the present embodiment is 2.0 mm. The width V1 is preferably 1.0 mm or more and 4.0 mm or less. Moreover, the space | interval L1 between the recessed parts 21 and 23 is 4.4 mm. The distance L1 is preferably 2.0 mm or more and 6.0 mm or less. By setting it as such a relation, a place where distance T between adjoining long crevices 21 becomes less than 6.0 mm except a crossing will be in a state where there is no crevice.

  Further, in the present embodiment, the thickness of the absorber 13 and the top sheet 14 before embossing is 8.0 mm, and as shown in FIG. 8, the depth of the deepest portion of the long recess 21 is as shown in FIG. Q1 is 7.8 mm. And the depth Q2 of the next deep part is 7.5 mm. And thickness Q4 of a non-compression field 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 largest depth Q1 of the part compressed by the recessed part 21, 3.0 mm-8.0 mm are preferable. And as for the difference Q3 with the next deep part, 0.1 mm-0.5 mm are preferable. Moreover, as for thickness (height) Q4 of a non-compression area | region, 5.0 mm-20.0 mm are preferable.

  By forming the recesses 21 and 23 with such depths and intervals, even if weight is applied, the grooves can be maintained and soft touch is maintained on the skin contact surface of the crotch portion of the diaper. can do. Therefore, the oblique grid-like emboss pattern can suppress deformation such as the diaper being twisted against various movements of the legs, and can make the touch soft and minimize irritation to the skin.

  In the present embodiment, the long concave portion 21 has its outer shape determined by the elongated substantially oval long concave first portion 211, but the present invention is not limited thereto, and a diagonal grid-like compressed row is used. A plurality of dots or recesses such as parallelograms may be intermittently arranged and formed. That is, in the present embodiment, it is important to provide the intersection neighborhood portion 26 which does not form a recess with a predetermined size, and the shape of the recess in the portion defined by the long recess 21 constituting each side of the grid is this It is not limited to the embodiment. The same effect can be obtained by arranging the plurality of dots described above. Also in this case, the recesses are arranged such that the distance between the adjacent recesses in the direction parallel to the diagonal of the lattice mass is T or more.

  Further, in the present embodiment, one side of the mass may be formed not by one long recess 21 but by two or more long recesses 21 whose length in the longitudinal direction is shortened. Further, the arrangement of the long concave second parts 212 in the long concave first parts 211 is distributed to the outside in the width direction so as to be alternate, but the present invention is not limited to this, and a configuration such as arranging in a line at the center It may be anything. Further, the shape of the long concave second portion 212 is not limited to the shape shown in the present embodiment, and can take various shapes such as a quadrangle, an oval, and a triangle.

  Further, in the present embodiment, the short concave portion is in the shape of a star whose four apexes are sharp, 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 form for recognizing it as the vertex (corner) of the grid mass.

  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 can not be overemphasized that it is applicable also to a unfolding type | mold diaper (so-called sheet type diaper). In addition, the absorbent article of the present invention is not limited to only diapers, and is generally applied to other general absorbent articles such as absorbent pads. For example, as shown in FIG. 5, due to the structure of the absorbent 13 and the top sheet 14 part, the present invention is applicable to an absorbent pad etc. and has the same function and effect as a diaper.

10 Disposable Diaper 10F Front Body Area 10R Back Body Area 10C Crotch Area 10W Waist Around Opening 10L Leg Around Opening 11 Cover Sheet 11A Notch 11B Inner Cover Sheet 11C Outer Cover Sheet 12 Back Sheet (Back Sheet)
13 Absorber 14 Top sheet (front sheet)
15 Thread rubber (thread rubber around legs)
17 thread rubber (waist rubber around waist)
18 side sheet 21 long recess (second recess)
21a Right facing long recess 21b Left facing long recess 211 Long recess first part (concave first part)
212 Long concave part second part (concave second part)
22 compression row 22a first compression row 22b second compression row 23 short recess (first recess)
24 Semi-compressed area 25 Main absorption area (Inside area surrounded by edges that make up the mass) (Uncompressed area)
26 Near intersection (uncompressed area)
L1 longitudinal spacing S1 between adjacent recesses in a compression row formation spacing S2 of a plurality of first compression rows formation spacing T of a plurality of second compression rows shortest distance between adjacent recesses U length of a longitudinal recess V longitudinal recess Short side length (width) of
V1 width of short recess

Claims (6)

A concave portion having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, wherein the top sheet and the absorber are compressed. An absorbent article having
The concave portion is a lattice formed by a component inclined to one side and a component inclined to the other side with respect to a virtual line extending from the ventral side of the wearer through the crotch when the absorbent article is worn A first recess located at the intersection of the grids, and a second recess located between the first recesses,
Between the first recess and the second recess is a non-compression region,
The second recess, the recess and the first part, Ri Do from the further concave recess Part 2 in the first portion recess, is below the second concave portion are present the absorbent body over the entire,
An absorbent article characterized by the above.   The absorbent article according to claim 1, wherein in the recess, the surface sheet and the absorber are integrally joined.   3. The absorbent article according to claim 1, wherein a distance between the adjacent second recesses is 6 mm or more in a direction parallel to a diagonal in the lattice mass.   The space | interval of the said grating | lattice is 13 mm or more and 54 mm or less, The absorbent article in any one of the Claims 1 thru | or 3 characterized by the above-mentioned. The depth to the bottom of the second recess is 42.5% to 97.5% of the thickness of the absorber and the surface sheet in the non-compression region, and the depth to the bottom of the first recess Is 37.5% -95.0%, The absorbent article in any one of the Claims 1-4 characterized by the above-mentioned.   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 the front, the crotch, and the back.

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