JP2016214403A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article with improved suppleness of an absorber.SOLUTION: An absorbent article 10 includes: 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. In the absorber 13, a plurality of recesses 502 are formed on the surface on the side of the surface sheet 14. The plurality of recesses 502 form a plurality of first patterns 501a extending in parallel to a first direction and a plurality of second patterns 501b extending in parallel to a second direction crossing the first direction. The plurality of first patterns 501a and the plurality of second patterns 501b form a plurality of crossing regions (901, 902) where the first direction and the second direction cross. The depths of the recesses 502 positioned at the crossing regions (901, 902) are shallower than the depths of the recesses 502 positioned at intermediate areas 903 between the two adjacent crossing regions (901, 902).SELECTED DRAWING: Figure 9

Description

  The present invention relates to an absorbent article.

  In recent years, the demand for absorbent articles such as disposable diapers using a super absorbent polymer (hereinafter referred to as “SAP”) and non-woven fabrics is increasing.

  Absorbent articles such as disposable diapers have been improved in various ways to improve their functions and wearing feeling. The absorbent body used in this absorbent article absorbs and retains liquids such as urine. Therefore, the absorbent core, which is mainly a mixture of fluffy pulp and SAP, and tissue that wraps the absorbent core, etc. It consists of a core coating material.

  Such absorbent articles are required to be lightweight and compact, called ultra-thin, from the viewpoints of resource saving, logistics cost reduction, and improved storage efficiency at retail stores. It is becoming mainstream. Such an ultra-thin absorbent article can be realized by reducing the weight of the absorbent that occupies most of the weight and volume of the absorbent article and making it compact. That is, the thinning of the absorbent core made of a mixture of fluffy pulp and SAP is realized by increasing the relative content of SAP or using a sheet-like SAP instead of the mixture. ing.

  On the other hand, as the SAP content in the absorber is increased, the flexibility of the absorber itself tends to be lost. A large twisting force is applied to the inseam area of the wearer of the absorbent article due to the wearer's movement, particularly the movement of both legs, and thus the suppleness of the absorbent is impaired, which increases an uncomfortable feeling when the absorbent article is worn. Leads to.

  Thus, for example, Patent Document 1 discloses a technique in which a compression groove having an oblique lattice shape is formed on the surface of the absorber, and the absorber is easily bent from the portion of the compression groove following the twisting force applied to the absorber. Proposed. By the structure of the absorber of patent document 1, it becomes possible to improve followability to a wearer and to hold the flexibility of the absorber. Furthermore, by using such a slanted lattice shape to improve the diffusibility of the liquid on the surface of the absorber, the utilization efficiency of the absorber can be improved and the cost can be reduced.

JP2015-16218A

  However, the oblique lattice shape as described in Patent Document 1 causes the absorber surface to be crushed in the intersecting region of the two compressed grooves forming the absorber lattice during the pressing process, and the absorber is broken. There is a fear. Further, since the material is gathered in the intersecting region more than other portions of the surface of the absorber, there is a problem that the absorber becomes hard, the touch becomes worse, and the flexibility is impaired.

  This invention is made | formed in view of such a problem, The place made into the objective is to provide the absorbent article which improved the flexibility of the absorber.

  In order to achieve such an object, the absorbent article of the present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. In the absorbent article, the absorbent body is formed with a plurality of recesses on the surface sheet side surface, and the plurality of recesses are a plurality of first patterns extending in parallel with the first direction. A plurality of second patterns extending in parallel with a second direction intersecting the first direction, the plurality of first patterns and the plurality of second patterns comprising the first direction and the A plurality of intersecting regions intersecting in the second direction are formed, and the depth of the recessed portion located in the intersecting region is shallower than the depth of the recessed portion located in an intermediate region between two adjacent intersecting regions. To do.

  As described above, according to the present invention, the depth of the concave portion located in the intersecting region is shallower than the depth of the concave portion located in the intermediate region between two adjacent intersecting regions, so that the flexibility of the absorber is increased. It is possible to provide an absorbent article with improved resistance.

It is a three-dimensional projection figure which shows the external appearance of the underpants type disposable diaper which applied the absorbent article which concerns on one Embodiment of this invention. It is an expanded view of the underpants type disposable diaper which concerns on one Embodiment of this invention. It is a three-dimensional projection figure which unfolds and shows the disposable diaper concerning one embodiment of the present invention. It is sectional drawing of the disposable diaper which concerns on one Embodiment of this invention. It is a figure which shows the absorber of the disposable diaper which concerns on one Embodiment of this invention. It is a fragmentary sectional view of the absorber of a disposable diaper concerning one embodiment of the present invention. It is an enlarged view which shows the groove part of the absorber which concerns on one Embodiment of this invention. It is an enlarged view which shows the upper surface of the absorber which concerns on one Embodiment of this invention. It is sectional drawing which shows the groove | channel on the upper surface of the absorber which concerns on one Embodiment of this invention. It is an enlarged view which shows the upper surface of the absorber which concerns on other embodiment of this invention. It is sectional drawing which shows the groove | channel on the upper surface of the absorber which concerns on other embodiment of this invention. It is an enlarged view which shows the upper surface of the absorber which concerns on other embodiment of this invention. It is sectional drawing which shows the groove | channel on the upper surface of the absorber which concerns on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, but includes other absorbent articles belonging to the concept of the present invention.

[Embodiment 1]
First, the whole shape of the underpants type disposable diaper which applied the absorbent article which concerns on Embodiment 1 of this invention is demonstrated using FIGS. 1-4.

  FIG. 1 is a three-dimensional projection view showing an external appearance of a pants-type disposable diaper to which the absorbent article according to the present embodiment is applied as viewed from the front side. FIG. 2 is a development view of the pants-type disposable diaper according to the present embodiment.

  The pants-type disposable diaper 10 according to 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. 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 one of the regions from the base of the wearer's legs to the thigh are formed by the lower end of the front body region 10F and the back body region 10R and the crotch region 10C. Yes.

  When the disposable diaper 10 is worn, the front body region 10F is located on the wearer's ventral side, and the back body region 10R is located 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.

  The disposable diaper 10 is provided with a cover sheet 11 so as to cover the front body region 10F and the back body region 10R together with the crotch region 10C, and the right and left side edges of the cover sheet 11 are joined together to form a closing portion 10J. ing. Thus, a waist opening 10W and a pair of left and right leg openings 10L are defined.

  In the disposable diaper 10 according to the present embodiment, an imaginary line P is assumed that extends through the crotch region 10C from the abdominal side to the back side at or near the center of the disposable diaper 10 in the width direction. Specifically, the imaginary line P extends, for example, along the abdominal surface of the disposable diaper 10 and vertically when the waist side when the disposable diaper 10 is worn is up and the crotch side is down. It extends in the vertical direction along the surface of the diaper 10 on the back side via the region 10C.

  As shown in FIG. 2, a pair of notch portions 11 </ b> A each having a semicircular arc shape that is a leg-periphery opening 10 </ b> L in FIG. 1 is formed at the center of the left and right side edges in the longitudinal direction of the cover sheet 11. . On the surface of the cover sheet 11 that comes into contact with the wearer's skin, an absorbent body 13 having an elongated rectangular shape is disposed so as to cover the front body region 10F, the crotch region 10C, and the back body region 10R. The absorber 13 is joined to the back sheet 12. The back sheet 12 bonded to the absorber 13 is a direction in which the longitudinal direction is substantially parallel to the imaginary line P, and the cover sheet 11 is positioned so that the imaginary line P passes through the center in the width direction or the vicinity thereof. Bonded on top. A liquid-permeable top sheet 14 that touches the wearer's skin is joined on the surface of the absorbent body 13.

  The cover sheet 11 is joined with a rubber thread 15 for forming the leg gathers and a rubber thread 17 for forming the waist gathers in an expanded state.

  In addition, a pair of side sheets 18 forming a three-dimensional gather are provided on the left and right side edges of the top sheet 14. The pair of side sheets 18 is a member that rises along both side edges of the absorbent body 13 when worn and prevents side leakage of urine excreted by the wearer. Each of the side sheets 18 is provided with a thread rubber 19 as a three-dimensional gather elastic material in a form in which the inner edge of the side sheet 18 is folded back to the absorbent body 13 side and is worn when the thread rubber 19 contracts. Stands up toward the person's skin contact direction. The three-dimensional gather can employ a known configuration used in conventional disposable diapers. For example, it can be formed by sandwiching and fixing a stretched three-dimensional gather elastic material between the layers of the water repellent sheet.

  FIG. 3 is a three-dimensional projection view showing an exploded state in which the disposable diaper 10 according to this embodiment is broken and developed. The laminated structure of the disposable diaper 10 is demonstrated using FIG.

  As shown in FIG. 3, the disposable diaper 10 includes a cover sheet 11, a liquid-impermeable back sheet 12, an absorber 13, and a top sheet 14 that are sequentially stacked and joined in order from the outside.

  The cover sheet 11 formed with a pair of notches 11A is formed by an inner cover sheet 11B on the skin side of the wearer and an outer cover sheet 11C joined to the outside of the inner cover sheet 11B. The inner cover sheet 11B is joined to the back sheet 12. The absorber 13 is disposed between the back sheet 12 and the top sheet 14, and the top sheet 14 is joined to the back sheet 12 through the absorber 13. The outer cover sheet 11C is formed of a thin non-woven fabric in order to obtain a good touch, and the rubber thread 15 and 17 are joined in an extended state between the inner cover sheet 11B and the outer cover sheet 11C. In addition, a pair of side sheets 18 forming a three-dimensional gather are provided on the left and right side edges of the top sheet 14. The pair of side sheets 18 is a member that rises along both side edges of the absorbent body 13 when worn and prevents side leakage of urine excreted by the wearer. Each of the side sheets 18 is provided with a rubber thread 19 as a three-dimensional gather stretchable material in a form in which the inner edge of the side sheet 18 is folded and gripped toward the absorber 13 side.

  The back sheet 12, the absorbent body 13, and the top sheet 14 can be bonded to underwear or the like to form an absorbent article that absorbs liquid.

  FIG. 4 is a cross-sectional view of the disposable diaper 10 according to the present embodiment taken along the line IV-IV in FIG. The cross-sectional shape of the absorber 13 of the disposable diaper 10 is demonstrated using FIG.

  On the surface of the top sheet 14, the absorbent body 13 and the top sheet 14 are compressed by intermittent embossing, and a plurality of quadrilateral concave portions are integrally formed. The plurality of recesses are arranged at intervals to form a groove 401 through which a liquid such as urine passes. The groove 401 has a depth from the surface on the top sheet 14 side of the absorber 13 toward the surface on the back sheet 12 side. A portion surrounded by the groove 401 formed on the surface of the absorbent body 13 is referred to as a “deformation suppressing portion 402”. The details of the shape loss suppressing unit 402 will be described later. Note that the ridge line at the top of the groove 401 indicates a contour line 403 of a portion that is not the groove 401 and that is visible when the cross section is cut.

  Next, the absorber 13 of the disposable diaper 10 according to the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a top view with the surface on the top sheet 14 side of the absorbent body 13 of the disposable diaper 10 according to the present embodiment facing upward. The surface shape of the absorber 13 is demonstrated using FIG.

  The absorber 13 is mainly made of pulp and SAP. The absorber 13 has an elongated rectangular shape so as to cover the front body region 10F, the crotch region 10C, and the back body region 10R. The absorbent body 13 is divided into three parts in the longitudinal direction into a front body part M1, a crotch part M2, and a back body part M3. The crotch portion M2 may be formed with a pair of notches that form an arc shape in accordance with the pair of left and right leg openings 10L that surround the thick crotch portions of the wearer's legs. In the absorbent body 13, the direction from the crotch part M2 to the front body part M1 is the front (upward) direction, the direction from the crotch part M2 to the back body part M3 is the back (downward) direction, and is orthogonal to the front-rear direction (longitudinal direction). The direction is the left-right direction (width direction). Moreover, although the absorber 13 is a rectangle, the shape of the absorber in this invention is not restricted to this. For example, the shape of the absorber has rounded corners at the front and rear (up and down) ends, an elliptical shape extending in the front and rear (up and down), a circular shape, and the length of the front and rear (up and down) left and right are about the same Includes various shapes such as rectangular ones.

  Further, the absorber 13 is formed with grooves 501 extending in an oblique lattice shape. In the present embodiment, the grooves 501 extend discontinuously in an oblique lattice shape from one end to the other end of the groove forming region N1. The groove 501 formed as a result of compression centered on the recess 502 of the absorbent body 13 may be intermittent or continuous depending on the interval and depth of the recess 502. Or a mixture of both. 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.

  As shown in FIG. 5, in this embodiment, the groove 501 is formed in the groove forming region N1 by a pattern in which a plurality of concave portions 502 are arranged at a predetermined interval. The groove 501 extends from one upper side to the other lower side (in FIG. 5) in the width direction (left-right direction) of the absorber 13 orthogonal to the direction (longitudinal direction) indicated by the phantom line P that is parallel to the longitudinal direction of the absorber 13. A plurality of first grooves (first patterns) 501a extending in a first direction inclined from the upper right side toward the lower left side toward the paper surface, and one lower side (from the other upper side toward the paper surface in FIG. 5). And a plurality of second grooves (second patterns) 501b extending in a second direction inclined from the upper left to the lower right. The first grooves 501a are arranged in parallel with each other at a predetermined interval. Similarly, the second grooves 501b are arranged in parallel with each other at a predetermined interval. However, the plurality of grooves 501 may not be completely parallel to each other, and the intervals between them may not be constant.

  In FIG. 5, the plurality of first grooves 501a are inclined at the same angle with respect to the virtual line P, and are arranged at a predetermined interval. That is, although each 1st groove | channel 501a is arrange | positioned in parallel and predetermined space | interval, this invention is not restricted to this, The thing where the space | interval of a groove | channel is not constant, and the inclination angle of each groove | channel differ. The same applies to the second groove 501b. In the absorber 13, a plurality of first grooves 501a and a plurality of second grooves 501b are formed, but a first groove and a second groove extending in an oblique direction are formed. If so, the number of grooves is not limited. Although it is preferable that the two intersect, the present invention is not limited to this, and includes those in which the two do not intersect. Details of the operation of the groove will be described later.

  The absorber 13 has a groove forming region N1 in the center region in the width direction, and has groove non-forming regions N2 on both sides thereof. Both side edges in the width direction of the absorber 13 are groove non-formation regions N2, and the groove formation region N1 extends in a band shape from one end to the other end in the direction indicated by the phantom line P in the central region.

  FIG. 6 is a partial cross-sectional view of the disposable diaper 10 according to this embodiment, taken along the line VI-VI in FIG.

  The groove 501 is a member in which a predetermined groove pattern is formed from the surface of the absorbent body 13 on the top sheet 14 side, and is formed by compressing the absorbent body 13 with heat in some cases. The width and depth of each groove 501 may be uniform, or may vary according to the distance between adjacent grooves, the position of the groove, and the like. Moreover, as shown in FIG. 6, the side wall of the groove 501 may be V-shaped obliquely inclined from the absorber surface, or may extend substantially vertically. Note that the ridge line at the top of the recess 502 indicates a contour line 601 of a portion that is not the groove 501 and is visible when cut in a cross section.

  By the compression for forming the groove 501, the groove 501 portion of the absorber 13 and possibly the vicinity thereof are compressed as compared with other portions, and the density of the absorber 13 is increased. The compression ratio of the most compressed groove 501 is preferably about 4 to 7 times, but other compression ratio ranges are included depending on the material of the absorber 13 and the liquid to be absorbed. Moreover, the absorber density of the compressed part is more than twice that of the non-compressed part. The absorber density is mainly the density of the pulp.

  As described above, the groove 501 portion of the absorbent body 13 is formed by compressing the absorbent body 13. Therefore, the absorbent body 13 is compressed and harder than the other parts of the absorbent body 13 in the groove 501 and possibly the vicinity thereof.

  Moreover, since the outer periphery of the absorber in the shape change suppressing portion 402 is pressed by the groove 501, the shape change suppressing portion 402 is difficult to be deformed. Therefore, even if a tensile force is generated in an oblique direction with respect to the longitudinal direction, the absorber 13 is obliquely less likely to wrinkle due to the rigidity of the groove 501, and the deformation preventing portion 402 is not easily deformed. The deformation with respect to the direction will be suppressed. Therefore, the absorber 13 is not greatly deformed and deformed by the longitudinal movement of the legs. Since the absorbent body 13 does not move, the fit between the crotch can be maintained, and body fluid leakage hardly occurs. Moreover, since it can also suppress that the absorber 13 cuts by deformation | transformation, absorption performance can be maintained.

  In the present embodiment, the groove forming region N1 extends from the front body portion M1 to the back body portion M3 of the absorber 13, but the present invention is not limited to this. That is, the groove forming region N1 may be formed only in the crotch portion M2. Further, the groove forming region N1 may be formed only in the front body part M1 or only in the back body part M3, or may not be formed in the end portion in the longitudinal direction. Since the portion close to the waist portion is in close contact with the skin by waist gathers, the feeling of wear is improved by preventing the hard portion of the groove 501 from hitting the skin.

  The disposable diaper 10 according to the present embodiment has a configuration in which a top sheet 14 is laminated on the surface of an absorbent body 13, and is compressed from the surface of the top sheet 14 to form a groove 501. That is, the top sheet 14 is fixed in a state of being in close contact with the groove 501. In this way, by compressing the top sheet 14 together, the top sheet 14 is also formed with the deformation preventing portion 402, and it is suppressed that the top sheet 14 is twisted or cut off with respect to movement during walking.

  As shown above, when the sheet laminated on the absorbent body 13 is also compressed to form the groove 501, the top sheet 14 on the absorbent body 13 is absorbed in the groove 501 portion by this compression. It bites into the side 13 and is integrated with the absorber 13. By fixing the strong absorbent body 13 and the various sheets as described above, the swaying and biasing of the absorbent body 13 can be suppressed even when the legs move back and forth.

  FIG. 7 is an enlarged view showing a part of the groove 501 on the upper surface of the absorber 13 according to the present embodiment (the groove 501 of the absorber 13 surrounded by the broken line ellipse VII in FIG. 5).

  The groove 501 can be configured by arranging a plurality of recesses 502 with an interval L1. The concave portion 502 has, for example, a quadrilateral shape, and is formed by compressing the absorber 13 with an embossed shape of the same shape. The interval L1 is about 2 mm. The length L2 of the recess is about 2.4 mm. The width L3 of the recess is about 2 mm. L1, L2, and L3 are preferably in the ranges of 1 mm ≦ L1 ≦ 5 mm, 1 mm ≦ L2 ≦ 50 mm, and 1 mm ≦ L3 ≦ 5 mm, respectively. In addition, the recessed part 502 is shown typically and the number and magnitude | size follow this range.

  The recesses 502 are arranged with an interval L 1, but the gap 701 between the adjacent recesses 502 is recessed more than the mold collapse suppression unit 402 surrounded by the groove 501. That is, the absorber 13 in the gap 701 is pulled with the compression when the recess 502 is formed, and the recess 502 is recessed as compared with the deformation prevention portion 402. Therefore, although there is a difference in height between the recess 502 and the gap 701, the groove 501 is lower than the non-compressed portion and lower than the deformation prevention portion 402 as a whole.

  In such a groove 501 constituted by intermittent embossing, the compression ratio is preferably about 4 to 7 times in the concave portion 502, but is not limited to this range. Other ranges are included depending on the material and the liquid to be absorbed.

  Thus, the groove 501 can be configured by intermittent embossing. As a result, it is possible to suppress the kinking and deformation of the absorber due to the longitudinal movement of the legs. In addition, when the embossing of the groove 501 is intermittent, the groove 501 itself is also easily bent and fits to the body more easily, and can follow the movement of the body, thereby suppressing a sense of stiffness.

  FIG. 8 is an enlarged view showing a part of the groove 501 formed on the upper surface of the absorber 13 according to the present embodiment (part of the lattice shape in the groove forming region N1 surrounded by the broken line circle Q in FIG. 5). It is. In FIG. 8, a groove 501 forms four compression lines AB, BC, CD, and DA by arranging a plurality of concave portions 502 at intervals, and these are orthogonal at intersections A, B, C, and D. By doing so, an oblique lattice ABCDA is formed. The concave portion 502 has a role of imparting an uneven shape to the absorber 13 and diffusing the liquid or the like on the absorber 13. Note that the compression lines AB, BC, CD, and DA in FIG. 8 are schematically shown. In the present embodiment, as an example, the concave portion 502 has a quadrilateral shape, and is formed by compressing the absorbent body 13 with an embossed shape of the same shape. The interval between the plurality of recesses 502 is preferably in the range of 1 mm to 5 mm, the length of the recesses 502 is in the range of 1 mm to 50 mm, and the width of the recesses 502 is preferably in the range of 1 mm to 5 mm.

  As shown in FIG. 8, three concave portions 502 are intermittently arranged on the line segment AB. The concave portion 502 located near the midpoint on the line segment AB is compressed most deeply, and the intersections A and B near the line segment AB are compressed shallower than the concave portion 502. Note that the number of the recesses 502 is not limited to three as in the present embodiment.

  FIG. 9 is a cross-sectional view of the groove 501 formed on the upper surface of the absorber 13 according to the present embodiment, taken along the line IX-IX in FIG. As shown in FIG. 9, in the groove 501 in which the concave portions 502 are intermittently arranged from the intersection A to the intersection B on the line segment AB, the compression line AB and DA intersect with each other (intersection A and its vicinity) 901 and compression. The intersection region (intersection B and its vicinity) 902 of the lines AB and BC is compressed most shallowly, and the recess 502 of the intermediate region 903 located between the two adjacent intersection regions 901 and 902 is compressed most deeply. . Thus, the compression line AB is formed by a compressed region having a plurality of depths. In the present embodiment, the groove 501 shows an example in which the concave portion 502 is intermittently formed, but the present invention is not limited to this. For example, the recesses 502 may be continuously connected to form the grooves 501, and the depth of the recesses 502 gradually decreases from the center of the intermediate region 903 toward the intersecting regions 901 and 902.

  Between the compression lines AB, an interlayer junction compression portion 904 that is deeper than the depth of the recess 502 is intermittently formed at the bottom of the recess 502 where the depth of the groove 501 is the deepest. By forming the interlayer bonding compression portion 904, the absorber 13 and the back sheet 12 stacked on the absorber 13 can be brought into an integrated state by compression. One interlayer junction compression portion 904 may be formed, or a plurality of interlayer junction compression portions 904 may be formed. The ridge line at the top of the recess 502 indicates a contour line 905 of a portion that is not a groove 501 and is visible when cut in a cross section.

  Next, an example of a method for processing the surface shape of the absorber 13 according to the present embodiment will be described with reference to FIGS. 8 and 9.

  When forming the oblique lattice ABCDA on the upper surface of the absorber 13 according to the present embodiment, the concave portions 502 are usually arranged by using an embossing technique to form the compression lines AB, BC, CD, and DA. As a result, an oblique lattice ABCDA is formed. Specifically, for example, the concave portion 502 is formed by rotating the forming roll in a direction orthogonal to the extending direction of the rotation shaft. In FIG. 8, the extending direction of the rotation axis of the forming roll is orthogonal to the line segment CA, and the forming roll is rotated from the intersection C to the intersection A in parallel to the line segment CA (the arrow direction in FIG. 8). Here, when the depths of the recesses forming the grooves 501 of the compression lines AB and DA are constant, when the forming roll approaches the intersection region 901 in the vicinity of the intersection A, the material on the surface of the absorber 13 reaches the intersection A. There is a risk of going near and causing a tingling.

  However, since the depth of the intersecting region 901 is shallower than the depth of the intermediate region 903 in the concave portion 502 that forms the groove 501 of the present embodiment, the material on the surface of the absorber 13 approaches the intersection point A. Can be prevented. Thereby, in the intermediate region 903, the absorber 13 is compressed to the back sheet 12, and in the intersection region 901, the material is not torn, so that the material of the absorber 13 in the vicinity of the intersection A is not torn and the flexibility of the absorber 13 is reduced. Can be improved. Furthermore, since the hardness of the surface of the absorber 13 can be reduced, the followability of the wearer can be improved, and the comfort and feel can be improved.

  The shape of the groove is not limited to the shape of the present embodiment, and the groove is formed in a continuous line in the extending direction, or the width of the cross section perpendicular to the extending direction is widened in the intermediate region to intersect. It can also be formed narrow in the region. Further, the groove may be formed with a continuous line for a part thereof, and the remainder may be formed intermittently, or the cross-sectional area perpendicular to the extending direction of the groove may be changed by a combination of changes in the width and depth thereof. It may be allowed.

[Embodiment 2]
FIG. 10 shows a part of the grooves 501 formed on the upper surface of the absorber 13 according to Embodiment 2 of the present invention (part of the lattice shape in the groove forming region N1 surrounded by the broken line circle Q in FIG. 5). It is an enlarged view shown. The shape of the absorbent body 13 of the present embodiment is different from the shape of the absorbent body 13 of the first embodiment in that the concave portions 1002 on the compression line are continuously connected to form the groove 1001, and the depth of the concave portion is greater than the intersecting region. A deeper recess is formed at the center of the deep intermediate region.

  As shown in FIG. 10, on the compression line AB, the recesses 1002 near the intersection A (between the points Aa) and near the intersection B (between the points dB) are compressed most shallowly and are adjacent between the points Aa and between the points dB. The recesses 1002 between the points ab and cd are relatively deeply compressed. And the recessed part 1002 between the points bc located in the center part on compression line AB is compressed most deeply.

  11 is a cross-sectional view of the absorber 13 according to the present embodiment taken along the XI-XI cross-sectional line of FIG. As shown in FIG. 11, in a groove 1001 in which concave portions 1002 are continuously formed from an intersection point A to an intersection point B on a line segment AB, the compression line AB and DA intersecting region (between the points Aa) 1101 and compression The concave region 1002 of the intersecting region of the lines AB and BC (between the points dB) 1102 is compressed most shallowly, and intermediate regions 1103 and 1104 (between the points ab and cd) positioned between the two adjacent intersecting regions 1101 and 1102 )) 1002 is relatively deeply compressed. And the recessed part 1002 of the intermediate | middle area | region 1105 (between points bc) located between the intermediate | middle area | regions 1103 and 1104 is compressed most deeply. In this way, the compression line AB is formed by a compressed region having a plurality of depths in stages. In the present embodiment, the groove 1001 shows an example in which the concave portions 1002 are continuously formed, but the present invention is not limited to this. For example, the recesses 1002 may be intermittently arranged to form the groove 1001, and the stepped depth may be not only two steps but also three steps or more.

  Between the compression lines AB, an interlayer junction compression portion 1106 that is deeper than the depth of the intermediate region 1105 is intermittently formed at the bottom of the intermediate region 1105 where the depth of the recess 1002 is the deepest. By forming the interlayer bonding compression portion 1106, the absorber 13 and the back sheet 12 stacked on the absorber 13 can be brought into an integrated state by compression. One or more interlayer junction compression portions 1106 may be formed. A ridge line at the top of the recess 1002 indicates a contour line 1107 of a portion that is not a groove 1001 and is visible when cut in a cross section.

  In the absorber 13 of the present embodiment, the depth of the recesses 1002 in the intersecting regions 1101 and 1102 is stepwise shallower than the depth of the recesses 1002 in the intermediate regions 1103 to 1105. It is possible to prevent the material on the surface of the body 13 from approaching the intersection A. As a result, in the intermediate regions 1103 to 1105 (particularly, the intermediate region 1105), the absorber 13 is compressed to the back sheet 12, while the cross region 1101 does not get crushed, so the material of the absorber 13 near the intersection A is torn. The flexibility of the absorber 13 can be improved. Furthermore, since the hardness of the surface of the absorber 13 can be reduced, the followability of the wearer can be improved, and the comfort and feel can be improved.

  Here, the absorber 13 of the first embodiment has a small difference in depth between the contour line 905 and the intermediate region 903. On the other hand, since the absorber 13 of this embodiment has a large difference in depth between the contour line 1107 and the intermediate regions 1103 and 1004, the absorber 13 is easily bent along the recess 1002. Thereby, in this embodiment, the suppleness of the absorber 13 can be improved more than Embodiment 1. FIG.

[Embodiment 3]
12 shows a part of the groove 1201 formed on the upper surface of the absorber 13 according to Embodiment 3 of the present invention (part of the lattice shape in the groove forming region N1 surrounded by the broken line circle Q in FIG. 5). It is an enlarged view shown. The shape of the absorbent body 13 of the present embodiment is different from the shape of the absorbent body 13 of the first and second embodiments in that the concave portions 1202 on the compression line are continuously connected to form the groove 1201, and the concave portion 1202 is formed more than the intersecting region. Two deeper recesses are intermittently formed in the intermediate region having a deep depth.

  As shown in FIG. 12, on the compression line AB, the concave portions 1202 near the intersection A (between the points Aa) and near the intersection B (between the points fB) are compressed most shallowly and adjacent to each other between the points Aa and dB. The recess 1202 between the points af is relatively deeply compressed. Then, the recesses 1202 between the points bc and between the points de located on both sides when viewed from the middle point between the points af on the compression line AB are further compressed most deeply.

  FIG. 13 is a cross-sectional view of the absorbent body 13 according to the present embodiment taken along the line XIII-XIII in FIG. As shown in FIG. 13, in a groove 1201 in which concave portions 1202 are continuously formed from an intersection point A to an intersection point B on a line segment AB, a compression line AB and DA intersecting region (between points Aa) 1301 and compression are formed. The recess 1202 in the intersection region 1302 between the lines AB and BC (between the points fB) is compressed most shallowly, and intermediate regions 1303, 1304, and 1305 (between the points ab and points between the two adjacent intersection regions 1301 and 1302). Recesses 1202 between cd and between points ef are relatively deeply compressed. The recess 1202 in the intermediate region 1306 (between the points bc) located between the intermediate regions 1303 and 1304 and the intermediate region 1307 (between the points de) located between the intermediate regions 1304 and 1305 is compressed most deeply. . Thus, the compression line AB is compressed to a plurality of depths in stages, and a plurality of deepest compressed regions are formed. In the present embodiment, the groove 1201 shows an example in which the recesses 1202 are continuously formed, but the present invention is not limited to this. For example, the recesses 1202 may be intermittently arranged to form the groove 1201, and the stepped depth may be not only two steps but also three steps or more. Further, there may be three or more deepest recess 1202 regions.

  Between the compression lines AB, interlayer junction compression portions 1308 and 1309 that are deeper than the depth of the intermediate regions 1306 and 1307 are intermittently formed at the bottoms of the intermediate regions 1306 and 1307 where the depth of the recess 1202 is the deepest. . By forming the interlayer bonding compression portions 1308 and 1309, the absorber 13 and the back sheet 12 stacked on the absorber 13 can be brought into an integrated state by compression. Note that one or more interlayer junction compression portions 1308 and 1309 may be formed. Further, the ridge line at the top of the concave portion 1202 shows a contour line 1210 of a portion that is not a groove 1201 and is visible when cut in a cross section.

  In the absorber 13 of the present embodiment, the depth of the recess 1202 in the intersecting regions 1301 and 1302 is stepwise shallower than the depth of the recess 1202 in the intermediate regions 1303 to 1307, so that the absorber 13 is the same as in the first and second embodiments. The material on the surface of the absorber 13 can be prevented from approaching the intersection A. As a result, in the intermediate regions 1303 to 1307 (particularly, the intermediate regions 1306 and 1307), the absorber 13 is compressed to the back sheet 12, and the cross region 1301 is not crushed. Therefore, the material of the absorber 13 near the intersection A is The flexibility of the absorber 13 can be improved without being broken. Furthermore, since the hardness of the surface of the absorber 13 can be reduced, the followability of the wearer can be improved, and the comfort and feel can be improved.

  Further, in the absorber 13 of the present embodiment, the intermediate regions 1303 to 1307 are formed in the intermediate regions 1303 to 1307, and the intermediate regions 1306 and 1307 having deep recesses 1202 are formed, so that the intermediate regions 1303 to 1307 are easily bent. Therefore, the flexibility of the absorber 13 can be further improved.

  The absorbent body of the present invention may be wrapped with a hydrophilic sheet (such as a core wrap) and compressed together with the hydrophilic sheet to form a recess. Moreover, you may compress a absorber, a hydrophilic sheet | seat, and a top sheet together from the surface of a top sheet, and may form a recessed part.

  Moreover, the shape of the recess is not limited to a quadrilateral shape, and various shapes may be used. For example, a circle, an ellipse, a square, a triangle, etc. In any of these shapes, it is sufficient that the groove can be formed on the surface of the absorber. In the above embodiment, the numerical values such as the width and depth of each recess are measured with reference to the vicinity of the center where the width and depth of each recess are near the maximum value. Thus, in principle, values such as the width and depth of each recess are measured based on the vicinity of the center of each recess, but in the case where the shape of each recess is complicated, Other portions of the recess may be used as a measurement standard for numerical values such as width and depth.

  The structure of the disposable diaper of the present invention is not limited to the pants type as described above, but any configuration as long as the diaper includes the configuration of the absorbent article defined in the claims. Also good. For example, the present invention can be applied to a well-known unfolded disposable diaper or a urine leak pad.

  In addition, the present invention is applicable not only to diapers for infants but also to various absorbent articles and absorbent bodies such as adult diapers and urine leak pads.

  In addition to the above-described effects, the present invention improves the utilization efficiency of the absorber and reduces the cost by improving the diffusibility of the liquid on the absorber surface by the oblique lattice shape. In addition, the form of the absorber 13 of Embodiments 1 to 3 of the present invention can be combined with each other.

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 10J Closure 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, 17, 19 Thread rubber 18 Side sheets 401, 501, 1001, 1201 Groove 402 Deformation suppressing portion 403, 601, 905, 1107, 1310 Contour line 501a First groove 501b Second groove 502, 1002, 1202 Recess 701 Gap 901, 902, 1101, 1102, 1301, 1302 Intersection region 903, 1103-1105, 1303-1307 Intermediate region 904, 1106, 1308, 1309 Interlayer junction compression part

Claims (8)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet,
In the absorbent body, a plurality of recesses are formed on the surface sheet side surface,
The plurality of recesses includes a plurality of first patterns extending in parallel to a first direction and a plurality of second patterns extending in parallel to a second direction intersecting the first direction. Forming,
The plurality of first patterns and the plurality of second patterns form a plurality of intersecting regions where the first direction and the second direction intersect,
The depth of the said recessed part located in the said cross | intersection area | region is shallower than the depth of the said recessed part located in the intermediate area between two adjacent cross | intersection areas, The absorbent article characterized by the above-mentioned.   The absorbent article according to claim 1, wherein the plurality of recesses are formed from a surface of the top sheet.   The absorbent article according to claim 1 or 2, wherein the plurality of recesses are intermittently formed in the first direction and the second direction.   The absorbent article according to claim 1 or 2, wherein the plurality of recesses are continuously formed in the first direction and the second direction.   The absorbent article according to any one of claims 1 to 4, wherein a depth of the concave portion is gradually increased from the intersecting region toward the intermediate region.   The absorbent article according to any one of claims 1 to 4, wherein a depth of the concave portion continuously becomes deeper from the intersecting region toward the intermediate region.   The absorbent article according to any one of claims 1 to 6, wherein deeper concave portions are intermittently formed in the deepest region of the concave portion in the intermediate region.   The absorbent article according to any one of claims 1 to 7, wherein a plurality of regions having the deepest recesses are formed in the intermediate region.

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