JP6439651B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and more particularly, to an absorbent pad (urine pad) and a disposable diaper.

  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, since the absorbent body having an oblique lattice shape as described in Patent Document 1 is hardened by pressing, the overall rigidity is high, and it is difficult to twist a large amount. Therefore, although twisting due to various causes occurs in the absorbent body when worn, there is a problem that if the lattice is evenly arranged in the entire absorbent body, the direction of the pattern is determined, so that it becomes soft only in a certain direction.

  Furthermore, when the diagonal lattice shape is formed on the entire absorber, there is a problem that the air permeability in the extending direction of the absorber is deteriorated.

  This invention is made | formed in view of such a problem, The place made into the objective is to improve the flexibility of an absorber and to provide an absorbent article with good air permeability.

  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, a plurality of recesses are formed on the surface on the surface sheet side of the absorbent body, and the plurality of recesses located in both end regions sandwiching the central region of the absorber face both end regions. Forming a first pattern extending in the direction, and the plurality of recesses located in the central region of the absorber includes a plurality of second patterns extending in a direction intersecting with a direction in which both end regions face each other, And a plurality of third patterns extending in a direction crossing the pattern.

  As described above, according to the present invention, it is possible to improve the flexibility of the absorbent body and provide an absorbent article with good air permeability.

It is a three-dimensional projection figure which shows the external appearance of one Embodiment which applied the absorbent article by this invention to the underpants type disposable diaper. It is the partial fracture | rupture top view which expand | deployed the diaper shown in FIG. 1 and was seen from the skin contact surface side. It is sectional drawing which cut | disconnected the diaper shown in FIG. 2 by the III-III line. It is the disassembled perspective view which expand | deployed and disassembled the diaper shown in FIG. It is the partial top view which looked at the absorber part of the diaper shown in FIG. 1 in 1st Embodiment from the top sheet side. It is a typical fragmentary top view which shows the embossed pattern part of the diagonal grid | lattice form in FIG. It is sectional drawing in the VII-VII line of the absorber part of FIG. It is a typical top view which shows the example of the embossing pattern in 2nd Embodiment. It is a typical top view which shows the example of the embossing pattern in 3rd Embodiment. It is a typical top view which shows the example of the embossing pattern in 4th Embodiment.

  An embodiment of an absorbent article according to the present invention will be described in detail with reference to FIGS. 1 to 10.

[First Embodiment]
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 the pants-type disposable diaper shown in FIGS.

  The diaper 10 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 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 side edges 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 FIGS. 2 to 4, the diaper 10 according to the present embodiment has a cover sheet 11, a liquid-impermeable back sheet 12, and a hydrophilic thin film in order from the outside as viewed from the skin side of the wearer. The absorbent body 13 wrapped with a core wrap (tissue) 15 that is a sheet and a liquid-permeable top sheet 14 that touches the wearer's skin are sequentially stacked and joined. In addition, the absorbent article 13 and the top sheet 14 wrapped with the back sheet 12 and the core wrap 15 can be attached to underwear or the like to form an absorbent article that absorbs liquid.

  The cover sheet 11 is formed of a thin non-woven fabric in order to obtain a good hand and is joined to the back sheet 12. In addition, a pair of cutout portions 11A each having a semicircular arc shape that forms a leg-hole opening 10L in FIG. 1 is formed at the center of the left and right side edges in the width direction of the cover sheet 11.

  The back sheet 12 is bonded onto the cover sheet 11 so that the longitudinal direction is substantially parallel to the imaginary line P and the imaginary line P passes through the center in the width direction or the vicinity thereof.

  The absorbent body 13 of the present embodiment has an elongated shape, and in order to maintain the shape, for example, the absorbent body 13 is wrapped with a core wrap 15 (tissue) that is a hydrophilic thin sheet whose ends are joined together by gluing. Yes. The absorbent body 13 wrapped with the core wrap 15 is disposed between the back sheet 12 and the top sheet 14. The top sheet 14 of this embodiment is joined to the back sheet 12 via the absorber 13 wrapped with the core wrap 15. In addition, in this embodiment, although the absorber 13 wrapped with the core wrap 15 is used, the absorber in this invention does not need to be wrapped with the core wrap.

  A rubber thread 16 for forming a gathering around the leg and a rubber thread 17 for forming a gathering around the waist at positions adjacent to the pair of notches 11A of the cover sheet 11 and both ends in the longitudinal direction of the cover sheet 11. Are joined in an extended state.

  A pair of side sheets 18 forming a three-dimensional gather are provided on the left and right side edges in the width direction of the top sheet 14. The pair of side sheets 18 are formed in the same shape as the pair of cutout portions 11A of the cover sheet 11 at the outer end edges, and stand up along the left and right side edges of the absorbent body 13 when worn. Is a member for preventing side leakage of excreted urine. In each of the side sheets 18, the rubber thread 19 as a three-dimensional gather stretchable material is arranged in an expanded state in a form in which the inner edge of the side sheet 18 is folded and gripped toward the absorber 13, and when the rubber thread 19 contracts, Stands up toward the skin contact direction of the wearer. 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.

  As shown in FIG. 2, the side sheet 18 is drawn in the longitudinal direction by the expansion and contraction of the rubber thread 19. And as FIG. 3 shows, it becomes a three-dimensional gather where the inner edge part stood | started up.

  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 absorber 13 of this embodiment located under the top sheet 14 is mainly composed of pulp and a super absorbent polymer (hereinafter 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 of the diaper 10. 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 M1 to the back body part M3 are defined as the front and back (up and down) directions, and the direction perpendicular to the front and back part M3 is the left and right direction, for example, the front and back (up and down) end corners are rounded down, and the front and back (up and down) extend Various shapes are included, such as an elliptical shape, a circular shape, and a rectangular shape having the same length in the front and rear (up and down) and left and right directions.

  Here, the central region of the absorbent body 13 of the present invention refers to a region that first comes into contact with a liquid such as urine and the vicinity thereof. In addition, the center area | region of the absorber 13 can be changed with the wearer's physique, sex, etc. of an absorbent article.

  Next, the form of the embossing formed toward the absorber 13 from the top sheet 14 in this embodiment is demonstrated.

  As shown in FIGS. 5 and 6, the diaper 10 has a compression row formation region (emboss pattern formation region) N <b> 1 subjected to compression by regular embossing from the surface of the top sheet 14 toward the absorber 13. . In the compression row forming region N1, a plurality of concave portions 21 are formed by compression. The front body portion M1 and the back body portion M3 of the compression row forming region N1 have a plurality of linear patterns (first patterns) extending in the longitudinal direction of the absorber as viewed from the distance by the arrangement of the recesses 21. A compression row 22 is formed. In addition, a plurality of compression rows 22 that form an oblique lattice-like pattern (second pattern and third pattern) are formed in the crotch portion M2 of the compression row formation region N1 by the arrangement of the recesses 21. Yes.

  As shown in FIG. 6, the compression row 22 is formed by arranging a plurality of recesses 21 at regular intervals. And the compression row | line | column 22 is the 1st compression row | line | column 22a (1st pattern) formed in the front body part M1 and the back body part M3, and the 2nd compression row | line 22b (2nd pattern) formed in the crotch part M2. ) And the third compressed row 22c (third pattern).

  The first compression row 22a extends in the vertical direction parallel to the imaginary line P in FIG. 5, which is a direction in which both end regions across the central region of the absorber 13 are opposed to each other. The plurality of first compression rows 22a are arranged in parallel to each other. On the other hand, the second compression row 22b is inclined with respect to the virtual line P at the inclination angle α1 in the right direction in FIG. Further, the third compression row 22c is inclined with respect to the virtual line P at the inclination angle β1 in the left direction in FIG. 5 which is the third direction. In the present embodiment, the angle (α1 + β1) formed by the second compression row 22b and the third compression row 22c is 90 °, and the inclination angles α1 and β1 are the same angle, but the present invention is not limited to this. Absent. Although not shown in the figure, the concave portion 21 is formed by compressing the core wrap and the absorbent body 13 together from the surface of the top sheet 14.

  In the present embodiment, by arranging the compression rows 22 of the crotch portion M2 in an oblique lattice shape, the absorber 13 can be prevented from being swung by the movement of the front and rear of the leg. That is, by providing the second compression row 22b and the third compression row 22c, the absorber 13 is deformed along each compression row 22 with respect to the force applied in the oblique direction by the longitudinal movement of the legs. 13 can be prevented from twisting. Moreover, the compression row | line | column 22 of the crotch part M2 can increase the rigidity of the absorber 13, and it can suppress that the absorber 13 cut | disconnects with respect to the diagonal pulling force by a motion of a leg.

  Furthermore, in this embodiment, by arranging the compression row 22 of the front body part M1 and the back body part M3 in a straight line, the inside air (from the waist part located on the back side or the stomach side of the wearer of the diaper 10) It is easy to release moisture) and to take in outside air. For this reason, the movement of the air between the inside and the outside of the diaper 10 can be facilitated, and the air permeability of the diaper 10 can be improved. Moreover, since the absorber 13 follows the form of the waist part of the diaper 10 by arrange | positioning the compression row | line 22 linearly as mentioned above, a wearer's fit property can be improved.

  As shown in FIG. 7, the plurality of recesses 21 are formed by compressing the top sheet 14 and the absorber 13 together with an adhesive interposed between the top sheet 14 and the absorber 13. is there. Thus, by compressing the top sheet 14 and the absorber 13 from the surface of the top sheet 14, the concave portion 21 maintains its shape even when the weight of the wearer such as seating is applied, and the compression row 22 I won't get tired. Therefore, the diaper 10 of this embodiment can diffuse a body fluid and maintain ventilation | gas_flowing using this compression row | line | column 22. FIG.

  In addition, as FIG. 5 shows, the compression row | line | column 22 (embossing pattern) is not formed in the right-and-left both sides edge part of the width direction of the absorber 13. As shown in FIG. Therefore, the absorber 13 has the compression row non-formation region (emboss pattern non-formation region) N2 positioned on both sides of the compression row formation region (emboss pattern formation region) N1. This is to prevent body fluid from leaking from the leg opening 10L through the compression row 22. Similarly, the compression row | line | column 22a is not formed in the both ends of the longitudinal direction of the absorber 13. FIG. Thereby, it can prevent that a bodily fluid leaks through the compression row | line | column 22a from the waist periphery opening part 10W, such as a stomach side and a back side.

  As shown in FIG. 5, the plurality of first compression rows 22a are arranged in parallel to each other. Similarly, the plurality of second compression rows 22b are arranged in parallel to each other, and the plurality of third compression rows 22c are arranged in parallel to each other. Further, the end of the first compression row 22a (first pattern) arranged in the front body portion M1 and the back body portion M3 on the central region (inseam portion M2) side is the second compression row 22b (second pattern). ) Or the third compression row 22c (third pattern). However, the interval between adjacent compression rows is not uniform, and the interval S2 between the second compression rows 22b of the crotch portion M2 is twice as large as the interval S1 in the front body portion M1 and the back body portion M3. Yes. Similarly, in the third compression row 22c, the interval S3 between the crotch portion M2 is twice the interval S1 between the front body portion M1 and the back body portion M3. However, the relationship of the ratio between the interval S1 and the intervals S2 and S3 is not limited to this embodiment.

  In the compression row 22 formed by connecting the recesses 21 and this, liquid is not sucked at the bottom surface, and a lot of liquid flows and runs in the row, and a part of the liquid is absorbed from the side walls of the recesses 21 and the like. On the other hand, since the absorber 13 is not compressed, the main absorption region 25 surrounded by the compression row 22 can sufficiently absorb the liquid.

  The size of each part related to the emboss pattern shown in FIG. 5 is as follows.

  As shown in FIG. 7, the thickness L4 of the non-compressed portion such as the main absorbent region 25 in the top sheet 14 and the absorbent body 13 is about 4 mm. The thickness L4 is preferably in the range of 2 mm to 6 mm. And the depth L5 of the deepest part of the recessed part 21 is about 3 mm. The depth L5 is preferably about 1 mm to 5 mm.

  And as FIG. 6 shows, the space | interval L1 between the adjacent recessed parts 21 of the recessed part 21 which forms the compression row | line | column 22 is about 2 mm. The distance L1 is preferably in the range of 1 mm to 5 mm. The length L2 of one recess 21 is about 2.4 mm. The length L2 is preferably in the range of 1 mm to 50 mm. The width L3 of the recess is about 2 mm. The width L3 is preferably in the range of 1 mm to 5 mm. 5 and 6, the recess 21 is a parallelogram, but the present invention is not limited to this, and various shapes such as a circle, an ellipse, and a triangle can be applied.

  As FIG. 5 shows, arrangement | positioning space | interval S1 of the 1st compression row | line | column 22a in the front body part M1 and the back body part M3 is 10 mm. As for arrangement | positioning space | interval S1, 5 mm-25 mm are desirable. The arrangement interval S2 of the second compression row 22b and the arrangement interval S3 of the third compression row 22c in the crotch portion M2 are 40 mm. As for arrangement | positioning space | interval S2 and S3, 30 mm-50 mm are desirable. In the present embodiment, the arrangement intervals S2 and S3 are the same, but may be different values.

  The form of the embossed pattern is not limited to the shape shown in FIG. 5, and the inclination of the compression row 22 is satisfied if the arrangement of the compression row 22 is satisfied in the front body portion M1, the back body portion M3, and the crotch portion M2. May be different.

  As described above, in the absorbent body 13 of the present embodiment, the first compression row 22a is arranged in the longitudinal direction of the absorbent body 13 in the front body portion M1 and the back body portion M3, and the slanted lattice shape is formed in the crotch portion M2. Two compressed columns 22b and a third compressed column 22c are arranged. Thereby, in the crotch part M2, the shape of the absorbent body 13 is prevented from being lost and the wearing feeling is enhanced, and the inclination angle of the compression row 22 is changed between the front body part M1, the back body part M3, and the crotch part M2. Therefore, it can cope with various twists. Further, by arranging the compression rows 22 of the front body part M1 and the back body part M3 in a straight line, the internal air (humidity) is removed from the waist part located on the back side or the abdomen side of the wearer of the diaper 10. Since it becomes easy to escape and it becomes easy to take in external air, the movement of the air between the inside and the outside of the diaper 10 can be facilitated, and the air permeability of the diaper 10 can be improved.

[Second Embodiment]
FIG. 8 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 Embodiment 2 of the present invention facing upward. The first point that 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 is that the first embodiment of the present embodiment is different from the interval S1 of the first compression row 22a of the first embodiment. This is a point where the interval A of one compression row 22a1 is wide. Further, the second difference is that the second compressed string 22b1 and the third compressed string of the present embodiment are different from the interval S2 of the second compressed string 22b and the interval S3 of the third compressed string 22c of the first embodiment. This is a point where the interval B of 22c1 is narrow.

  As shown in FIG. 8, the inclination angles α1 and β1 with respect to the virtual line P of the second compression row 22b1 and the third compression row 22c1 in the crotch part M2 are the same as the inclination angles α1 and β2 of the first embodiment, but are different. It may be a value. Further, the area of the absorption region (non-compression region) 25a surrounded by the second compression row 22b1 and the third compression row 22c1 in the crotch portion M2 is the area of the absorption region (non-compression region) 25 in the crotch portion M2 of the first embodiment. It is narrower, but it may be wide and may have the same size area.

  Further, as shown in FIG. 8, the arrangement interval A of the first compression rows 22a1 in the front body part M1 and the back body part M3 is 40 mm. The arrangement interval A is desirably 5 mm to 50 mm. The arrangement interval B between the second compression row 22b1 and the third compression row 22c1 in the crotch portion M2 is 25 mm. The arrangement interval B is preferably 10 mm to 40 mm. In the present embodiment, the second compression row 22b1 and the third compression row 22c1 have the same arrangement interval, but may be different values.

  In the absorbent body 13 of the present embodiment, the second compression row 22b1 and the third compression row 22c1 form a lattice shape, and the first compression row 22a1 of the front body portion M1 and the back body portion M3 forms a linear shape. If it is, the effect similar to the absorber 13 of Embodiment 1 is acquired.

  Further, as in the first embodiment, the absorbent body 13 of the present embodiment has no compression row 22 formed in the peripheral portion due to the above configuration, so that body fluid leaks from the leg-periphery opening 10L and the waist-periphery opening 10W. Can be prevented.

[Third Embodiment]
FIG. 9 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 Embodiment 3 of the present invention facing upward. The shape of the absorber 13 of the present embodiment is different from the shape of the absorber 13 of the first and second embodiments in that the first compression row 22a is inclined with respect to the imaginary line P at the inclination angles α2 and β2, and the absorber 13 The distance C between the first compression rows 22a2 becomes wider toward both ends in the longitudinal direction.

  Note that the interval B between the second compressed row 22b2 and the third compressed row 22c2 of the present embodiment is the same as the interval 2 of the second compressed row 22b and the interval S3 of the third compressed row 22c of the first embodiment. Narrow compared to.

  As shown in FIG. 9, the inclination angles α1 and β1 with respect to the virtual line P of the second compression row 22b2 and the third compression row 22c2 in the crotch portion M2 are the same as the inclination angles α1 and β2 of the first and second embodiments. May be different values. Further, the area of the absorption region (non-compression region) 25b surrounded by the compression rows 22b2 and 22c2 in the crotch portion M2 is the same as the area of the absorption region (non-compression region) 25a in the crotch portion M2 of Embodiment 2. Different sizes may be used. Furthermore, as shown in FIG. 9, the inclination angles α2 and β2 with respect to the virtual line P of the first compression row 22a2 are 8 °. The inclination angles α2 and β2 are preferably 2 ° to 15 °.

  The arrangement interval C1 near the crotch part M2 of the first compression row 22a2 in the front body part M1 and the back body part M3 is 17 mm, and the arrangement interval C2 near both longitudinal ends of the absorber 13 is 28 mm. The arrangement interval C (C1 and C2) is desirably 10 mm to 40 mm. In the present embodiment, the arrangement interval C1 is formed narrower than the arrangement interval C2, but may be formed at an equal interval or a wide interval.

  The arrangement interval B between the second compression row 22b2 and the third compression row 22c2 in the crotch portion M2 is 25 mm, as in the second embodiment. The arrangement interval B is preferably 10 mm to 40 mm. In the present embodiment, the inclination angles α2 and β2 are the same value, but may be different values. Further, in the present embodiment, the arrangement interval B of the second compression row 22b2 and the third compression row 22c2 is the same value, but may be a different value.

  In the absorbent body 13 of the present embodiment, the second compression row 22b2 and the third compression row 22c2 form a lattice shape, and the first compression row 22a2 of the front body portion M1 and the back body portion M3 forms a linear shape. If it is, the effect similar to the absorber 13 of Embodiment 1 is acquired.

  Further, similarly to the first and second embodiments, the absorbent body 13 of the present embodiment has no compression row 22 formed in the peripheral portion due to the above-described configuration, so that body fluid can be obtained from the leg periphery opening 10L and the waist periphery opening 10W. Leakage can be prevented.

[Fourth Embodiment]
FIG. 10 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 Embodiment 4 of the present invention facing upward. The first point that the shape of the absorber 13 of the present embodiment is different from the shape of the absorber 13 of the first to third embodiments is that the first compression row 22a3 is inclined with respect to the virtual line P at the inclination angles α3 and β3. The distance D between the first compression rows 22a3 becomes wider toward the both ends in the longitudinal direction of the absorber 13. The second difference is that the second compression row 22b3 and the third compression row 22c3 are inclined with respect to the imaginary line P at inclination angles α4 and β4 smaller than the inclination angles α1 and β1 to form a substantially rhombus. This is the point.

  As shown in FIG. 10, the inclination angles α3 and β3 of the first compression row 22a3 with respect to the virtual line P are smaller than the inclination angles α4 and β4 of the second compression row 22b3 and the third compression row 22c3 with respect to the virtual line P. There may be a large value or the same value. Further, the shape of the absorption region (non-compression region) 25c surrounded by the compression rows 22b3 and 22c3 in the crotch portion M2 is the shape of the absorption region (non-compression region) 25, 25a and 25b in the crotch portion M2 of the first to third embodiments. Compared to the longitudinal direction of the absorbent body 13, the absorbent body 13 is longitudinally long.

  Here, the inclination angles α3 and β3 with respect to the virtual line P of the first compression row 22a3 are 6 °. The inclination angles α3 and β3 are preferably 2 ° to 10 °. In addition, the inclination angles α4 and β4 of the second compression row 22b3 and the third compression row 22c3 with respect to the virtual line P are 12 °. The inclination angles α4 and β4 are preferably 2 ° to 20 °.

  The arrangement interval D1 in the vicinity of the crotch portion M2 of the first compression row 22a3 in the front body portion M1 and the back body portion M3 is 18 mm, and the arrangement interval D2 in the vicinity of both longitudinal ends of the absorber 13 is 27 mm. The arrangement interval D (D1 and D2) is desirably 10 mm to 30 mm. In the present embodiment, the arrangement interval D1 is formed narrower than the arrangement interval D2, but may be formed at an equal interval or a wide interval.

  The arrangement interval E between the second compression row 22b3 and the third compression row 22c3 in the crotch portion M2 is 22 mm. As for the arrangement | positioning space | interval E, 15 mm-30 mm are desirable. In the present embodiment, the inclination angles α3 and β3 are the same value, but may be different values. Similarly, the inclination angles α4 and β4 are the same value, but may be different values. Further, in the present embodiment, the arrangement interval E of the second compressed row 22b3 and the third compressed row 22c3 is the same value, but may be a different value.

  In the absorbent body 13 of the present embodiment, the second compression row 22b3 and the third compression row 22c3 form a lattice shape, and the first compression row 22a3 of the front body portion M1 and the back body portion M3 forms a linear shape. If it is, the effect similar to the absorber 13 of Embodiment 1 is acquired.

  Further, similarly to the first to third embodiments, the absorbent body 13 of the present embodiment has no compression row 22 formed in the peripheral portion due to the above-described configuration, so that body fluid can be obtained from the leg periphery opening 10L and the waist periphery opening 10W. Leakage can be prevented.

  The disposable diaper of this embodiment can be applied 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 tape 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.

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 12 Back sheet (back surface sheet)
13 Absorbent body 14 Top sheet (surface sheet)
15 Core wrap 16 Thread rubber (leg rubber thread)
17 Thread rubber (waist around the waist)
18 Side sheet 19 Yarn rubber (three-dimensional gather elastic material)
21 concave portion 22 compression row 22a first compression row 22b second compression row 22c third compression row 25 main absorption region (non-compression region)
L1 Front-rear spacing between adjacent recesses in the compression row L2 Length of recesses in the compression row L3 Width of recesses in the compression row S1, A, C1, C2, D1, D2 Formation intervals S2, S3, B of multiple first compression rows , E Formation intervals of a plurality of second compressed columns or third compressed columns

Claims (4)

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 located in both end regions sandwiching the central region of the absorber form a first pattern extending in a direction in which the both end regions face each other,
The plurality of recesses located in the central region of the absorber include a plurality of second patterns extending in a direction intersecting with the direction in which the both end regions face each other and a direction intersecting with the direction in which the both end regions face each other. extending Mashimashi, absorbent article and forming a plurality of third patterns extending in a direction crossing the second pattern.   The absorbent article according to claim 1, wherein at least one end of each of the second pattern and the third pattern communicates with the first pattern.   The absorbent article according to claim 1, wherein the first patterns extend parallel to each other.   The absorbent article according to any one of claims 1 to 3, wherein the second pattern and the third pattern intersect at a right angle.