JP6466162B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads.

  Conventionally, as a surface sheet of an absorbent article such as a disposable diaper, a sanitary napkin, an incontinence pad, etc., an uneven surface formed by embossing or the like is known on the skin side face directed to the skin side of the wearer. In addition, by forming an uneven shape on the skin side of the topsheet, it is also known to reduce the contact area with the skin of the wearer to improve air permeability and reduce stickiness to the skin. Yes.

From the viewpoint of improving the air permeability and reducing the stickiness of the skin, it is preferable that the concavo-convex shape of the surface sheet has a high shape retaining property. However, in general, when trying to improve the shape retention, the texture (feel) is deteriorated, or the skin is easily abraded by being rubbed.
Therefore, an absorbent article that is excellent in breathability, has a good texture, and is less likely to cause inconvenience due to abrasion of the skin is required for the absorbent article.

  Patent Documents 1 and 2 describe that a surface sheet of a disposable diaper is provided with a plurality of concave and convex regions having different convex shapes and heights. However, the breathability, texture, and the difficulty of scratching the skin are described. No mention is made of a configuration that improves everything.

JP 2009-148445 A JP 2009-136349 A

  The subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention is an absorbent article comprising a top sheet, a back sheet, and an absorbent body disposed between the two sheets, wherein the composite sheet has a first direction and an article width along the longitudinal direction of the article. The first sheet and the second sheet that are stacked are partially joined to form a plurality of joints, and the first sheet is a second sheet at a portion other than the joints. Projecting toward the wearer's skin, the composite sheet has a central continuous convex portion extending in the second direction at the center in the article width direction. A central region arranged in multiple rows in the direction, and having a side region in which a mesh-like continuous convex portion is formed on each side of the second direction across the central region, the central continuous convex portion Are connected in the second direction. Are formed Te, it is to provide an absorbent article.

  The absorptive article of the present invention is excellent in all of the resistance to scratching of the skin, air permeability, stuffiness prevention, and texture.

FIG. 1 is a plan view showing a basic configuration of a disposable diaper as an embodiment of the absorbent article of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3: is a top view which shows the surface sheet of the disposable diaper of 1st Embodiment, and the one part enlarged plan view. FIG. 4 is an enlarged perspective view of a part of the central region of the composite sheet used in the first embodiment. FIG. 5 is an enlarged perspective view of a part of the side region of the composite sheet used in the first embodiment. FIG. 6 is an enlarged plan view showing a part of the central region of the composite sheet used in the first embodiment. 7A is a sectional view taken along the line Va-Va in FIG. 6, FIG. 7B is a sectional view taken along the line Vb-Vb in FIG. 6, and FIG. 7C is a sectional view taken along the line Vc-Vc in FIG. It is. FIG. 8 is an enlarged plan view showing a part of the central region of the composite sheet shown in FIG. FIG. 9 is an enlarged plan view showing a part of the side region of the composite sheet used in the first embodiment. 10 is a cross-sectional view taken along line III-III in FIG. 11 is a cross-sectional view taken along line IV-IV in FIG. 12 (a) and 12 (b) are plan views showing an enlarged part of the side region of the composite sheet shown in FIG. FIG. 13A and FIG. 13B are plan views showing a part of the side region of the composite sheet shown in FIG. 3 in an enlarged manner. FIG. 14 is a schematic view showing an apparatus suitably used for manufacturing the composite sheet shown in FIG. FIG. 15 is a perspective view of a state where the central region forming part of the first roll in the apparatus shown in FIG. 14 is disassembled. FIG. 16 is a perspective view of a state where the side area forming portion of the first roll in the apparatus shown in FIG. 14 is disassembled. FIG. 17 is a diagram in which the peripheral surface of the central region forming portion of the first roll in the apparatus shown in FIG. 18 is a diagram in which the peripheral surface of the side portion forming portion of the second roll in the apparatus shown in FIG. 7 is developed in a plane. FIG. 19 is a diagram in which a state in which the convex portion of the second roll shown in FIG. 18 is engaged with the peripheral surface of the central region forming part of the first roll shown in FIG. 17 is developed in a plane. 20 is a diagram in which the peripheral surface of the side region forming portion of the first roll in the apparatus shown in FIG. 7 is developed in a plane. FIG. 21 is a diagram in which the peripheral surface of the side region forming portion of the second roll in the apparatus shown in FIG. FIG. 22 is a diagram in which a state where the convex portion of the second roll shown in FIG. 18 is engaged with the peripheral surface of the side region forming portion of the first roll shown in FIG. 20 is developed in a plane. FIG. 23 is a plan view showing a top sheet of the disposable diaper of the second embodiment. FIG. 24 is an enlarged plan view showing a part of the central region of the composite sheet used in the second embodiment. FIG. 25 is an enlarged plan view showing a part of the side region of the composite sheet used in the second embodiment. FIG. 26 is a view corresponding to FIG. 19 of the central region forming part of the first roll and the second roll used for manufacturing the composite sheet used in the second embodiment. FIG. 27 is a view corresponding to FIG. 22 of the side region forming portion of the first roll and the second roll used for manufacturing the composite sheet used in the second embodiment.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
1 and 2 show a basic structure of a disposable diaper 100 (hereinafter also simply referred to as diaper 100), which is an embodiment of the absorbent article of the present invention.
As shown in FIGS. 1 and 2, the diaper 100 includes a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13, and an absorber 14 disposed between the sheets 12 and 13. With respect to the back sheet 13, the liquid impermeability is a concept including poor liquid permeability, and includes cases where the back sheet 13 is made of a water-repellent sheet or the like in addition to the case where the liquid does not pass through the liquid at all.

  The diaper 100 has an article longitudinal direction Xa which is a direction coinciding with the wearer's front-rear direction when worn, and an article width orthogonal to the article longitudinal direction Xa in a state where the diaper 100 is expanded in a planar shape as shown in FIG. Direction Ya. Further, the diaper 100 includes, in the article longitudinal direction Xa, an abdominal side A that is disposed on the abdomen side of the wearer when worn, a back side B that is disposed on the back side of the wearer when worn, and an abdominal side part A. The crotch portion C is located between the back side portion B and the back side portion B. The diaper 100 is an unfolded disposable diaper. Fastening tapes 17 are provided on both side edges of the back side B, and a landing zone 18 that fastens the fastening tape 17 to the outer surface of the abdominal side A. Is provided.

  The absorbent body 14 in the diaper 100 includes an absorbent core 14a and a core wrap sheet 14b that wraps the absorbent core 14a. The absorptive core 14a can be comprised from the laminated fiber body of liquid absorbing fibers, such as a pulp fiber, for example, and the mixed fiber body of a liquid absorbing fiber and a water absorbing polymer. Examples of the liquid-absorbing fiber include cellulose-based hydrophilic fibers such as pulp fiber, rayon fiber, cotton fiber, and cellulose acetate. In addition to cellulosic hydrophilic fibers, fibers made of a synthetic resin such as polyolefin, polyester, polyamide, etc., made hydrophilic with a surfactant or the like can also be used. As the core wrap sheet 14b, for example, tissue paper or a water-permeable nonwoven fabric is used. One core wrap sheet 14b may wrap the entire absorbent core 14a, or a combination of two or more sheets may wrap the absorbent core 14a. As the back sheet 13, a liquid-impermeable or water-repellent resin film, a laminate sheet of a resin film and a nonwoven fabric, or the like is used.

  Sheets 15 for forming a three-dimensional gather having elastic members 15a are arranged on both sides in the longitudinal direction of the diaper 100, and the elastic members 15a contract to the crotch C in the worn state on the skin side of the wearer. A three-dimensional gather standing up is formed. In addition, the leg elastic member 16 is disposed in an extended state at a portion disposed around the leg in the crotch C. Due to the contraction, the leg crotch C fits around the wearer's leg in the worn state. Leg gathers that improve

The surface sheet 12 in the disposable diaper 100 of 1st Embodiment is comprised from the composite sheet 10 shown in FIG.
As shown in FIG. 3, the composite sheet 10 includes a first direction X along the longitudinal direction (article longitudinal direction) Xa of the diaper 100 and a second direction Y along the width direction (article width direction) Ya of the diaper 100. Have. Further, as shown in FIG. 3, the composite sheet 10 has continuous convex portions 40 extending in the second direction Y arranged in multiple rows in the first direction X at the center of the width direction (article width direction) Ya of the diaper 100. And a side region S in which a mesh-like continuous convex portion 40S is formed on each of both sides sandwiching the central region M. The central region M and the side regions S, S on both sides thereof are preferably formed at least in the crotch portion C in the longitudinal direction Xa of the diaper 100. It is preferable that it is formed over one or both of them, or over the entire length of the absorbent body 4, and further over the entire length of the diaper 100.

  4 is an enlarged perspective view showing a part of the central region M of the composite sheet 10, and FIG. 5 is an enlarged perspective view showing a part of the side region S of the composite sheet 10. It is shown. The side regions S are formed at positions symmetrical with respect to a center line (not shown) along the longitudinal direction Xa of the diaper 100, and irregularities are formed in each side region S in the pattern shown in FIG. ing.

  As shown in FIGS. 4 and 5, the composite sheet 10 includes a plurality of laminated first sheets 1 and 2 that are partially joined by embossing in both the central region M and the side region S. The first sheet 1 protrudes in a direction away from the second sheet 2 at a portion other than the bonding part, and forms a convex part protruding toward the wearer's skin side. . The composite sheet 10 has a substantially flat surface on the second sheet 2 side in both the central region M and the side region S, and has unevenness on the first sheet 1 side.

  The first sheet 1 and the second sheet 2 are made of a sheet material. As the sheet material, for example, a fiber sheet such as a nonwoven fabric, a woven fabric, and a knitted fabric, a film, and the like can be used. From the viewpoint of touch and the like, it is preferable to use a fiber sheet, and it is particularly preferable to use a nonwoven fabric. The kind of sheet material which comprises the 1st sheet | seat 1 and the 2nd sheet | seat 2 may be the same, or may differ.

Examples of the nonwoven fabric used when the nonwoven fabric is used as the sheet material constituting the first sheet 1 and the second sheet 2 include air-through nonwoven fabric, spunbond nonwoven fabric, spunlace nonwoven fabric, meltblown nonwoven fabric, resin bond nonwoven fabric, and needle punch nonwoven fabric. It is done. A laminate obtained by combining two or more of these nonwoven fabrics, or a laminate obtained by combining these nonwoven fabrics and a film can also be used. Among these, it is preferable to use an air-through nonwoven fabric or a spunbonded nonwoven fabric. The basis weight of the nonwoven fabric is preferably 10 g / m ² or more, more preferably 15 g / m ² or more, and preferably 40 g / m ² or less, more preferably 35 g / m ² or less. The basis weight of the nonwoven fabric is preferably 10 g / m ² or more and 40 g / m ² or less, and more preferably 15 g / m ² or more and 35 g / m ² or less.

  As the fibers constituting the nonwoven fabric, fibers made of various thermoplastic resins can be used. Examples of the thermoplastic resin include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyamides such as nylon 6 and nylon 66, polyacrylic acid, polymethacrylic acid alkyl ester, polyvinyl chloride, and polyvinylidene chloride. These resins can be used alone or as a blend of two or more. Further, it can be used in the form of a composite fiber such as a core-sheath type or a side-by-side type.

[Configuration of the central region M of the composite sheet 10]
FIG. 6 shows an enlarged plan view of the central region M of the composite sheet 10 shown in FIG. 7A to 7C are a cross-sectional view taken along the line Va-Va, a cross-sectional view taken along the line Vb-Vb, and a cross-sectional view taken along the line Vc-Vc in FIG. FIG. 8 is an enlarged plan view showing a part of FIG. 6 further enlarged.
As shown in FIGS. 3, 4, and 6, in the central region M of the composite sheet 10, a central continuous convex portion 40 extending continuously in the second direction Y is constant in the first direction X as the convex portion. Are formed at a distance of. Each of the central continuous convex portions 40 is formed by connecting the first convex portions 41 and the second convex portions 42 alternately arranged in the second direction Y, as shown in FIGS. 6 and 7A. Has been. In this specification, a convex part is connected that two adjacent convex parts are not separated by a joint part, and a part of one convex part forms a part of the other convex part. And a part of the other convex part forms a part of the one convex part.
The 1st convex part 41 and the 2nd convex part 42 which comprise the center continuous convex part 40 have a hollow part in each back side, The hollow part of the back surface of the 1st convex part 41, and the back surface of the 2nd convex part 42 A continuous hollow portion 40 </ b> V that extends continuously along the second direction Y is formed on the back side of the central continuous convex portion 40.
As shown in FIG. 8, the first convex portion 41 and the second convex portion 42 constituting the central continuous convex portion 40 are both elliptical in shape in plan view. The first convex portion 41 has an elliptical long axis that coincides with the first direction X, and the second convex portion 42 has an elliptical long axis that coincides with the second direction Y. Moreover, the 1st convex part 41 and the 2nd convex part 42 are carrying out the shape which has a top part in the cross section in any direction of the 1st direction X and the 2nd direction Y.

As shown in FIG. 6, in the central region M of the composite sheet 10, a non-embossed region N that extends in the second direction Y and does not have a joint portion continuously in the second direction Y, and in the second direction Y. Embossed regions E that extend and have joints formed in a regular pattern are alternately formed in the first direction X.
In the embossed region E, a first joint 31 and a second joint 32 are formed as joints formed by partially joining the laminated first sheet 1 and second sheet 2 by embossing. ing. In these joint portions 31 and 32, the first sheet 1 and the second sheet 2 are integrally pressed by embossing, and both the sheets are higher in density than the other portions, preferably Are thermally fused between the two sheets by melting of the constituent resin of one or both sheets and subsequent solidification.

In each embossed region E, the first joint portion 31 and the second joint portion 32 have different arrangement positions in the second direction Y as shown in FIG. Further, the first joint portion 31 and the second joint portion 32 are also different in lengths L1 and L2 along the second direction Y. Both the first joint portion 31 and the second joint portion 32 are rectangular, and each side of the rectangle coincides with the first direction X or the second direction Y.
The rectangular first joining portions 31 are arranged in a line at intervals along the second direction Y, with the long sides thereof matching the second direction Y. Thereby, the first joint portion row R1 along the second direction Y is formed. Similarly, the rectangular second joints 32 are arranged in a row at short intervals along the second direction Y with the short sides thereof aligned with the second direction Y. Thereby, the second joint row R2 along the second direction Y is formed.
In each first joint row R1, the arrangement interval of the first joints 31 in the second direction Y is constant. In each second joint row R2, the arrangement intervals of the second joint portions 32 in the second direction Y have two types of intervals, and alternately have wide portions and narrow intervals. . In each first joint row R1, the arrangement positions of the first joints 31 when viewed along the second direction Y are all the same. Also in each second joint row R2, the arrangement positions of the second joints 32 when viewed along the second direction Y are all the same.

Each embossed region E includes one first joint row R1 and two second joint rows R2 located on both sides in the first direction X, as shown in FIG.
When attention is paid to one first joint 31 constituting the first joint row R1, a total of four second joints 32 constituting two second joint rows R2 are formed around the first joint 31. The four corners of the first joint portion 31 are arranged close to each other with the corners facing each other. Accordingly, a group of joint portions 30 including one first joint portion 31 and four second joint portions 32 located around the first joint portion 31 is formed. In each embossed region E, a plurality of similar joint groups 30 are formed along the second direction Y at regular intervals.

  The central continuous convex portion 40 of the central region M of the composite sheet 10 used in the first embodiment extends continuously in the second direction Y and has a portion whose width is regularly narrowed in the second direction Y. . Specifically, as shown in FIG. 8, the first convex portion 41 of the continuous convex portion 40 is formed between the pair of first joint portions 31 that are opposed to each other with the non-embossed region N interposed therebetween. A second convex portion 42 of the central continuous convex portion 40 is formed in a region surrounded by a total of four second joint portions 32 composed of two pairs of second joint portions 32 facing each other in the first direction. Regarding the length in the direction along X, the length L42 of the second convex portion 42 is shorter than the length L41 of the first convex portion 41. The central continuous convex portion 40 is a constricted portion whose width (length in the first direction X) is narrower than the portion formed of the second convex portion 42.

  Moreover, the composite sheet 10 used in the first embodiment has a discontinuous embossed region in-convex portion 46 surrounded by an annular recess in the embossed region E, as shown in FIGS. 6 and 8. ing. The embossed region in-convex portion 46 has a shape having a top portion in a cross section in any of the first direction X and the second direction Y. The embossed region inner convex portion 46 has a hollow portion 46V on each back side.

  As shown in FIG. 4, a plurality of the embossed region in-convex portions 46 are linearly arranged in a row at a predetermined distance along the second direction Y to form an embossed region in-convex portion row. doing. A plurality of the second convex portions 42 are also arranged in a straight line at a certain distance along the second direction Y to constitute a second convex portion row. The embossed region inner convex portion 46 and the second convex portion 42 are formed at the same position in the second direction Y. More specifically, the second convex portions 42 and the embossed region inner convex portions 46 are alternately and linearly arranged along the first direction X. Further, as shown in FIG. 8, when attention is paid to the third convex portion 43 in addition to the second convex portion 42 and the convex portion 46 in the embossed region, these three types of convex portions are the second convex portion 42 and the third convex portion 46. The convex portion 43, the embossed region inner convex portion 46, and the third convex portion 43 are regularly and linearly arranged along the first direction X in this order.

  The embossed region inner convex portion 46 is separated from the continuous convex portion 40 and the other embossed region inner convex portion 46 by an annular concave portion 47. The annular recess 47 is composed of a joint portion and a third protrusion 43. Specifically, as shown in FIG. 8, two first joint portions 31, four second joint portions 32, and two third joint portions 32 located between two second joint portions 32 adjacent in the second direction Y. An annular recess 47 is formed from the protrusion 43. The shape of the third convex portion 43 in a plan view is a substantially rectangular shape that is long along the first direction X. The upper surface of the third convex portion 43 is substantially flat. Although the third convex portion 43 is literally a “convex portion”, the third convex portion 43 is relatively higher than any of the first and second convex portions 41 and 42 constituting the continuous convex portion 40. Since the height is low and the height is relatively lower than the convex portion 46 in the embossed region, the concave portions are relatively seen from these convex portions.

The central area M of the composite sheet 10 used in the present embodiment is the first convex part 41, the second convex part 42, the third convex part 43, and the convex part in the embossed area described above on the first sheet 1 constituting this. 46 is formed. The height of the third convex portion 43 is lower than any of the first convex portion 41, the second convex portion 42, and the embossed region convex portion 46.
When the height of the first convex portion 41 is H1, the height of the second convex portion 42 is H2, the height of the third convex portion 43 is H3, and the height of the convex portion 46 in the embossed region is H4, These preferably satisfy the following relationships (1) and (2), and more preferably satisfy the following relationships (1) to (3).
(1) H1 ≧ H2
(2) H1> H4, H2 ≧ H4
(3) H4 ≧ H3

[Configuration of Side Area S of Composite Sheet 10]
FIG. 9 shows an enlarged plan view of the side region S of the composite sheet 10 shown in FIG. 10 and 11 are a sectional view taken along line III-III and a sectional view taken along line IV-IV in FIG. 9, respectively.
As shown in these drawings, in the side region S of the composite sheet 10, the first sheet 1 constituting the first sheet 1 has three types of protrusions having different heights, a first protrusion 41 ′ and a second protrusion. A portion 42 ′ and a third convex portion 43 ′ are formed. These three types of convex portions are distinguished from each other in that their heights are different. Specifically, the height of the second convex portion 42 ′ is equal to or lower than that of the first convex portion 41 ′, and the height of the third convex portion 43 ′ is lower than that of the second convex portion 42 ′. It has become. That is, when the height of the first protrusion 41 ′ is H ₁ , the height of the second protrusion 42 ′ is H ₂ , and the height of the third protrusion 43 ′ is H ₃ , these are H ₁ ≧ H ₂ > H ₃ is satisfied. A plurality of convex portions 41 ′, 42 ′, 43 ′ are formed. Each of the first convex portion 41 ′ and the second convex portion 42 ′ in the side region S has a substantially circular shape in plan view. The diameter of the circle is such that the first convex portion 41 ′ is larger than the second convex portion 42 ′. 1st convex part 41 'and 2nd convex part 42' have the shape which has a top part in the cross section in any direction of the 1st direction X and the 2nd direction Y. On the other hand, the third convex portion 43 ′ has a substantially rectangular shape in plan view that is long along the first direction X. The upper surface of the third convex portion 43 ′ is substantially flat.

  As shown in FIG. 9, in the side region S of the composite sheet 10, the first convex portions 41 ′ are connected in the first direction X to form a plurality of first direction continuous convex portions 40R. The first-direction continuous convex portions 40R adjacent in the two directions Y are intermittently connected by the second convex portions 42 ′ arranged intermittently in the first direction X, so that a mesh-like continuous convex portion is formed. Part 40S is formed. The first direction continuous convex portions 40R are preferably formed in two or more rows in each of the left and right side regions S, S, more preferably in three rows or more, and preferably in 20 rows or less. More preferably, 10 rows or less are formed, preferably 2 rows or more and 20 rows or less, more preferably 3 rows or more and 10 rows or less.

  12 (a) and 12 (b) are plan views showing the main part of FIG. As is apparent from these drawings, in the side region S of the composite sheet 10, one or more first convex portions 41 ′ and one or more second convex portions 42 ′ are connected to form an annular connecting convex portion 44. doing. The annular connecting convex portion 44 has a substantially annular shape in plan view. The annular connecting convex portion 44 is formed by connecting six first convex portions 41 ′ and two second convex portions 42 ′. Specifically, in a plan view of the composite sheet 10, the composite sheet 10 is symmetrical with respect to the center line CL that connects the centers of the two second convex portions 42a and 42b arranged at a distance along the first direction X. A pair of first convex portion groups 41 </ b> A including three first convex portions 41 a, 41 b, 41 c arranged along the first direction X is located at a position. The three first convex portions 41a, 41b, and 41c constituting the first convex portion group 41A are connected along the first direction X. Of the three first convex portions 41a, 41b, and 41c constituting the first convex portion group 41A, the first convex portions 41a and 41c that are located at the end portions along the first direction X have the center positions thereof. , When viewed along the second direction Y. And the 2nd 1st convex part 41b located along the 1st direction X is biased to the outward along the 2nd direction Y rather than the other 1st convex parts 41a and 41c. In the pair of first convex portion groups 41A, among the first convex portion groups 41A, the first convex portions 41a and 41a located on one end side along the first direction X are two second convex portions. 42a and 42b, it is connected with the 2nd convex part 42a located in the one end side along the 1st direction X. Moreover, in a pair of 1st convex part group 41A, the 1st convex parts 41c and 41c located in the other edge part side along the 1st direction X among each 1st convex part groups 41A are two 2nd 2nd. It connects with the 2nd convex part 42b located in the other edge part side along the 1st direction X among convex parts 42a and 42b. As a result, one annular connecting convex portion 44 is formed by a total of eight convex portions including a total of six first convex portions 41a, 41b, 41c and a total of two second convex portions 42a, 42b. ing.

  When the composite sheet 10 is viewed in plan, the annular coupling convex portions 44 are linearly arranged in a row at a constant distance along the first direction X, thereby constituting an annular coupling convex portion row. The annular connection convex portion rows are arranged in multiple rows at a constant distance in the second direction Y. When attention is paid to one annular connecting convex part row, the arrangement of the annular connecting convex parts 44 is shifted by a half pitch between the adjacent annular connecting convex part rows. When attention is paid to one of the plurality of annular coupling convex portions 44 constituting one annular coupling convex portion row, the convex portion constituting the annular coupling convex portion 44 is adjacent to the front and rear thereof. The convex part which comprises a cyclic | annular connection convex part overlaps partially. For example, as shown in FIG. 13A, when attention is paid to one annular connecting convex portion 44A and another annular connecting convex portion 44B adjacent thereto along the first direction X, two annular connecting convex portions 44A are provided. The first convex portions 41c and 41c and the one second convex portion 42b overlap the two first convex portions 41a and 41a and the one second convex portion 42a of the annular coupling convex portion 44B. Further, as shown in FIG. 13B, when attention is paid to one annular connecting convex row 45A and the adjacent annular connecting convex row 45B, one annular constituting the annular connecting convex row 45A. The first convex portions 41b and 41c of the connecting convex portion 44A overlap with the first convex portions 41a and 41b of one annular connecting convex portion 44B constituting the annular connecting convex portion row 45B.

As shown in FIGS. 12A and 12B, a central convex portion 46 ′ is formed in the ring of the annular coupling convex portion 44 at substantially the center thereof. One central convex portion 46 ′ is formed in the ring of one annular connecting convex portion 44. As with the other convex portions, the central convex portion 46 ′ is formed so as to protrude from the first sheet 1 in the direction away from the second sheet, and is preferably formed apart. The central convex portion 46 ′ has a substantially circular shape in plan view. The circular diameter substantially coincides with the second convex portion 42 ′. Further, as shown in FIG. 11, the central projection 46 'height H ₄ of the second protrusion 42' has a substantially same as the height H ₂ of. The height H ₄ of the central convex portion 46 ′ is higher than the height H _{3 of} the third convex portion 43 ′. The central convex portion 46 ′ has a shape having a top portion in a cross section in any of the first direction X and the second direction Y.

  As shown in FIGS. 13A and 13B, the annular connecting convex portion 44 and the central convex portion 46 ′ located in the ring are separated by an annular concave portion 47 ′. The annular recess 47 includes a joint portion and a third protrusion 43 '. Specifically, a joint portion is configured by a first joint portion 31 that is vertically long along the first direction X in plan view and a second joint portion 32 that is substantially square in plan view. An annular recess 47 ′ is formed by the joint portions 31, 32 and the two third protrusions 43 ′. Although the third convex portion 43 ′ is literally a “convex portion”, the third convex portion 43 ′ is more than the first convex portion 41 ′ and the second convex portion 42 ′ constituting the annular connecting convex portion 44. Since the height is relatively low and the height is relatively lower than the central convex portion 46 ′, the concave portions are relatively viewed from these convex portions.

  The annular recess 47 ′ is composed of two first joint portions 31, four second joint portions 32, and a third convex portion 43 ′. Specifically, as shown in FIG. 13B, in the plan view of the composite sheet 10, the center connecting the centers of the two third convex portions 43 ′ arranged at a distance along the first direction X. A pair of joint portions 33 in which the second joint portion 32, the first joint portion 31, and the second joint portion 32 are arranged in this order along the first direction X are located at positions symmetrical with respect to the line CL. ing. Of the three joints 31 and 32 constituting the joint group 33, the second joint 32 located at the end along the first direction X has a center position seen along the second direction Y. At the same position. And the 2nd 1st junction part 31 located along the 1st direction X is biased to the outward along the 2nd direction Y rather than the two 2nd junction parts 32. As shown in FIG.

  As shown in FIG. 9, the plurality of central convex portions 46 ′ are linearly arranged in a row at a constant distance along a first direction X that is one direction in the plane of the composite sheet 10. Thus, a central convex row is formed. This center convex part row | line | column is arrange | positioned in multiple rows at a fixed distance in the 2nd direction Y. When attention is paid to one central convex portion row, the arrangement of the central convex portions 46 ′ is shifted by a half pitch from the adjacent central convex portion row. Similarly, as shown in FIG. 9, a plurality of second convex portions 42 ′ are linearly arranged at a certain distance along a first direction X that is one direction in the plane of the composite sheet 10. It arrange | positions and it comprises the 2nd convex part row | line | column. This 2nd convex part row | line | column is arrange | positioned in multiple rows at a fixed distance in the 2nd direction Y. When attention is paid to one second convex portion row, the arrangement of the second convex portions 42 ′ is shifted by a half pitch from the adjacent second convex portion row.

  The above-described second convex portion row and the central convex portion row of the side region S are arranged at the same position in the plan view of the composite sheet 10. Specifically, as shown in FIG. 9, the second convex portions 42 ′ and the central convex portions 46 ′ are alternately and linearly along the first direction X that is one direction in the plane of the composite sheet 10. Has been placed. Furthermore, paying attention to the third convex portion 43 ′ in addition to the second convex portion 42 ′ and the central convex portion 46 ′, these three types of convex portions are the second convex portion 42 ′ and the third convex portion 43 ′. The central convex portion 46 ′ and the third convex portion 43 ′ are regularly and linearly arranged in this order along the first direction X that is one direction in the plane of the composite sheet 10.

  On the other hand, with respect to the second direction Y orthogonal to the first direction X, as shown in FIG. 9, the first joint portion 31, the central convex portion 46 ′, the first convex portion located on the straight line L extending along the second direction Y The cycle is repeated along the second direction Y, with the joint portion 31, the first convex portion 41 ′, the second convex portion 42 ′, and the first convex portion 41 ′ as one cycle.

  The 1st junction part 31 and the 2nd junction part 32 in each of the center area | region M and the side area | region S can be formed by various means. When the first sheet 1 and the second sheet 2 are made of a material that can be heat-sealed, heat, ultrasonic waves, high-frequency fusion, or the like can be used. Regardless of the material of the first sheet 1 and the second sheet 2, adhesion by an adhesive can also be used. When both the sheets 1 and 2 are joined to form the joints 31 and 32 by using fusion by heat, ultrasonic waves, and high frequency, the joints 31 and 32 are compared with parts other than the joints 31 and 32. Consolidated. When the sheets 1 and 2 are made of fiber sheets, the distance between fibers is shortened by consolidation, or the fiber form is lost and film formation occurs. In the manufacturing method of the composite sheet 10 to be described later, both the sheets 1 and 2 are joined by thermal fusion to form the joining parts 31 and 32 each consisting of a fusion part.

  In the diaper 100 of 1st Embodiment, as shown in FIG. 3, the center area | region M is located in the center part of the width direction Ya of the diaper, and a pair of side area | region S is the composite sheet 10 which has the above structure. , S are arranged on the absorbent body 14 so as to be located on both sides of the central region M, and used as the liquid-permeable surface sheet 12.

In the diaper 100 of 1st Embodiment, like a normal diaper, during wearing of a diaper, between the surface sheet 12 and the wearer's skin in the width direction center part of a diaper, the direction along the diaper longitudinal direction Xa Misalignment is likely to occur. However, in the diaper 100 of 1st Embodiment, the center area | region M of the composite sheet 10 mentioned above is distribute | arranged to the diaper width direction center part, and the center continuous convex part 40 is with the change of the relative position of skin. In order to follow and deform so as to fall in the first direction X, the extent to which the skin is rubbed by the central continuous convex portion 40 and the first and second convex portions 41 and 42 constituting the central convex portion 40 can be reduced.
On the other hand, the side region S having the mesh-like continuous convex portions 41 provided on both the left and right sides of the central region M has a mesh shape so that the continuous convex portions 41 and the convex portions constituting the continuous convex portions 41 are retained. By having high formability and maintaining a low contact area with the wearer, etc., excellent breathability is obtained between the wearer and the topsheet 12, and on both sides of the diaper and in the vicinity of the side of the absorber, Less sweaty stickiness and stuffiness.

Moreover, in the diaper 100 of the first embodiment, the central continuous convex portion 40 in the central region M is a plurality of convex portions 41 formed by deforming the first sheet 1 away from the second sheet 2. , 42 are connected to each other, and the texture (feel) in the central region M is also excellent.
As described above, the diaper 100 according to the first embodiment forms the unevenness of the different patterns described above in the central region M and the side region S, so that the skin is not easily rubbed, air permeability, stuffiness prevention, and texture. Everything is excellent.

  Further, as described above, the central continuous convex portion 40 in the central region M of the composite sheet 10 used in the first embodiment has the first convex portion 41 and the second convex portion 42 having different lengths in the first direction X. Are alternately connected in the second direction Y (see FIG. 6, FIG. 7A and FIG. 8). Therefore, there exists an advantage that it is easy to follow a wearer's movement and is excellent in the shape stability of a continuous convex part.

  Moreover, although the 1st convex part 41 and the 2nd convex part 42 which comprise the center continuous convex part 40 may have the same height, it is preferable that a height also differs. By alternately forming the first convex portion 41 and the second convex portion 42 having different heights in the second direction Y, the contact area between the skin and the surface sheet can be further reduced, and the air permeability can be improved. There is an advantage that it is more excellent by reducing the stickiness of the skin. When the central continuous convex portion 40 is formed of the first convex portion 41 and the second convex portion 42 having different heights, the first convex portion 41 and the second convex portion 42 have the same length in the first direction. Also good.

  Further, as described above, the mesh-like continuous convex portion 40S in the side region S of the composite sheet 10 used in the first embodiment has a plurality of convex portions (first convex portion 41 ′, second convex portion 42 ′). Are connected to each other, the air permeability in the side region S is further improved, and the texture (texture) in the side region S is further improved.

  Furthermore, as described above, the mesh-like continuous convex portion 40S in the side region S of the composite sheet 10 used in the first embodiment is formed by connecting the first convex portion rows formed by connecting the first convex portions 41 ′. Since the gap is intermittently connected by the second convex portion 42 ′ having a height lower than that of the first convex portion 41 ′, the contact area between the skin and the surface sheet is further reduced, and the air permeability is increased. There is an advantage that it is further improved by improving the skin or reducing the stickiness of the skin.

  Moreover, in the diaper 100 of 1st Embodiment, as shown to the enlarged plan view in FIG. 3, in the boundary part of the center area | region M and the side area S, the center continuous convex part 40 and the mesh-like continuous convex part 40S Are connected, and the central continuous convex portion and the mesh-like continuous convex portion form a continuous convex portion that is not divided by the joint portion between the first sheet 1 and the second sheet 2. Thereby, there exists an advantage that the shape of each continuous convex part of the center area | region M and the side area | region S becomes still more stable.

  Moreover, in the diaper 100 of 1st Embodiment, although the absorber 14 is comprised from the core wrap sheet | seat which wraps the absorptive core 14a and this absorptive core 14a, the absorptive core 14a is shown in FIG. As described above, the both sides of the crotch part C of the diaper have notches 14c and 14c having a concave shape in plan view in which the material for forming the absorbent core 14a is not disposed. The left and right side regions S, S of the composite sheet 10 described above overlap with the left and right cutouts 14c, 14c, respectively, as shown in FIG. The portion that overlaps the cutout portion 14c overlaps the highly breathable side region S, so that the portion that is arranged on the side of the absorbent body 4 and the portion along the circumference of the wearer's leg can be prevented from breathing and swelling. This can be further improved. Note that the side region S preferably overlaps at least a part of the notch 14c, and more preferably overlaps the entire region of the notch 14c.

  The notch 14c has a depth d1 (see FIG. 1) of preferably 2 mm or more, more preferably 8 mm or more, preferably 50 mm or less, more preferably 35 mm or less, and preferably 2 mm or more and 35 mm. Hereinafter, it is more preferably 8 mm or more and 35 mm or less. The depth d1 of the notch 14c is measured along the width direction of the diaper.

  Instead of forming the notches 14c and 14c on both sides of the absorbent core 14a, the sides of the absorbent core 14a are spaced from the side edges of the absorbent core 14a on both sides of the longitudinal center line (not shown). It is also preferable to provide the penetrating portion that is formed and to overlap the side region S of the composite sheet 10 on the penetrating portion. Even in this case, it is possible to further improve the air permeability and stuffiness prevention of the portion arranged on the side of the absorbent body 4 and the portion along the circumference of the wearer's leg.

  From the standpoint of achieving both a rubbing reduction effect in the central region M, a breathability in the side region S, and an anti-steaming effect, the central continuous convex portion 40 in the central region M and the continuous continuous convex portion 40S in the side region S have a height. The difference in height between the largest convex portions is preferably small. For example, the first convex portion 41 and the second convex portion 42 constituting the central continuous convex portion 40 are higher in height. When the height is high, the height H1 of the first convex portion 41 of the central continuous convex portion 40 is not less than ½ and not more than 2/1 of the height H1 of the first convex portion 41 having the largest height constituting the continuous convex portion 40S. Preferably, it is 2/3 or more and 3/2 or less, more preferably 3/4 or more and 4/3 or less.

From the viewpoint of ensuring that one or more of the effects described above are more reliably exhibited, the central region M of the composite sheet 10 preferably has the following configuration.
In the non-embossed region N, the length Ln in the first direction X is preferably 20% to 100% of the length Le in the same direction of the embossed region E, more preferably 30% to 90%. is there. The length Ln along the first direction X of the non-embossed region N is 30 mm or more, particularly 2 mm or more, preferably 10 mm or less, particularly preferably 5 mm or less, and 1 mm or more and 10 mm or less. Is preferably 2 mm or more and 5 mm or less. On the other hand, the length Le along the first direction Y of the embossed region E is preferably 1 mm or more, particularly 2 mm or more, preferably 20 mm or less, particularly preferably 10 mm or less, and 1 mm or more and 20 mm or less. Preferably, it is 2 mm or more and 10 mm or less.

Further, the length L5 along the second direction Y of the gap between the joint group 30 in the embossed region E may be 20% or more and 100% or less of the length Ln along the first direction X of the embossed region E. Preferably, it is 30% or more and 90% or less. The length L5 is preferably 0.1 mm or more and 5 mm or less, and more preferably 0.5 mm or more and 3 mm or less.
Further, the length L41 along the first direction X of the first protrusion 41 is preferably 120% or more, more preferably 150% or more of the length L42 along the first direction X of the second protrusion 42. Also, it is preferably 300% or less, more preferably 280% or less, for example, 120% or more and 300% or less, and more preferably 150% or more and 280% or less. Further, the pitch of the first protrusions 41 in the second direction Y (the distance between the center points of the protrusions) and the pitch of the second protrusions 42 (the distance between the center points of the protrusions) are preferably 2 mm or more. Preferably, it is 4 mm or more, preferably 40 mm or less, more preferably 20 mm or less, and preferably 2 mm or more and 40 mm or less, more preferably 4 mm or more and 20 mm or less.

  Further, the length L3 along the first direction X of the first joint portion 31 is preferably 0.1 mm or more, particularly 0.5 mm or more, and preferably 10 mm or less, particularly 5 mm or less. For example, the length L3 along the first direction X of the first joint portion 31 is preferably 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less. On the other hand, the length L1 along the second direction Y of the first joint portion 31 is preferably 0.1 mm or more, particularly 0.5 mm or more, and preferably 10 mm or less, particularly 5 mm or less. For example, the length L2 along the second direction Y of the first joint portion 31 is preferably 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less.

  Further, the length L4 along the first direction X of the second joint portion 32 is preferably 0.1 mm or more, particularly 0.5 mm or more, and preferably 10 mm or less, particularly 5 mm or less. For example, the length L4 along the first direction X of the second joint portion 32 is preferably 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less. On the other hand, the length L2 along the second direction Y of the second joint portion 32 is preferably 0.1 mm or more, particularly 0.5 mm or more, and preferably 10 mm or less, particularly 5 mm or less. For example, the length L2 along the second direction Y of the second joint portion 32 is preferably 0.1 mm or more and 10 mm or less, and more preferably 0.5 mm or more and 5 mm or less.

  Further, in the second joint row R2, the spacing between the joints 32 in the second direction Y is large (the same as the length L1 of the first joint in FIG. 8). It is preferably 1 time or more, preferably 10 times or less, particularly preferably 8 times or less, preferably 1 time or more and 10 times or less, with respect to the interval between the joint portions 32 (same as the length L5 of the gap). In particular, it is preferably 1 to 8 times.

  From the viewpoint of ensuring that the above-described one or more effects are more reliably exhibited, the side region S of the composite sheet 10 preferably has the following configuration.

The height _{H 1} of the first protrusion 41 ', 0.5 mm or more, preferably particularly 1mm or more, 5 mm or less, more preferably 4mm or less. Preferably for example the height _{H 1} of the first protrusion 41 'is 0.5mm or more 5mm or less, and more preferably 1mm or more 4mm or less. The second protrusion 42 'height _{H 2} of the first protrusion 41' as the height _{H 1} and provided that equal to or lower of, 0.3 mm or more, preferably particularly 0.6mm or more, 4 mm Hereinafter, it is particularly preferably 3 mm or less. Preferably for example height _{H 2} of the second protrusion 42 'is 0.3mm or more 4mm or less, and more preferably 0.6mm or more 3mm or less. The height H ₃ of the third convex portion 43 ′ is preferably 0.2 mm or more, particularly preferably 0.4 mm or more, provided that it is lower than the height H _{2 of} the second convex portion 42 ′. In particular, it is preferably 2.5 mm or less. For example, the height H ₃ of the third convex portion 43 ′ is preferably 0.2 mm or greater and 3 mm or less, and more preferably 0.4 mm or greater and 2.5 mm or less. Central projection 46 the height _{H 4} 'of, 0.3 mm or more, preferably particularly 0.6mm or more, 4 mm or less, more preferably less than 3mm. For example, preferably a height _{H 4} of the central projection 46 'is 0.3mm or more 3mm or less, and more preferably 0.6mm or more 4mm or less.

The heights H ₁ , H ₂ , H ₃ , and H ₄ of the convex portions 41 ′, 42 ′, 43 ′, and 46 ′ are from the lower surface of the second sheet 2 to the upper surface of the first sheet 1 as shown in FIG. Is defined as the distance to. The heights H ₁ , H ₂ , H ₃ , and H ₄ are measured by measuring the shortest distance between the bottom surface of the second sheet 2 and the top of the convex portion using a digital microscope (manufactured by Keyence). To the value obtained.

  For the same reason as that for setting the height of each convex portion 41 ′, 42 ′, 43 ′, 46 ′ as described above, the diameter of the first convex portion 41 ′ in plan view is 1 mm or more, particularly 2 mm. Preferably, it is 20 mm or less, particularly 10 mm or less. For example, the diameter of the first convex portion 41 ′ is preferably 1 mm or more and 20 mm or less, and more preferably 2 or more and 10 mm or less. The diameter of the second convex portion 42 ′ is preferably 0.5 mm or more, particularly 1 mm or more, and preferably 15 mm or less, particularly 5 mm or less. For example, the diameter of the second convex portion 42 ′ is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 15 mm or less. The diameter of the third convex portion 43 ′ is preferably 0.2 mm or more, particularly 0.5 mm or more, and preferably 10 mm or less, particularly 3 mm or less. For example, the diameter of the third convex portion 43 ′ is preferably 0.2 mm or greater and 10 mm or less, and more preferably 0.5 mm or greater and 3 mm or less. The diameter of the central convex portion 46 ′ is preferably 0.5 mm or more, particularly 1 mm or more, and preferably 15 mm or less, particularly 5 mm or less. For example, the diameter of the central convex portion 46 ′ is preferably 0.5 mm or greater and 15 mm or less, and more preferably 1 mm or greater and 5 mm or less.

  For the same reason as that for setting the diameter of each convex portion as described above, the length along the first direction X of the first joint portion 31 in plan view is 0.5 mm or more, particularly 1 mm or more. It is preferably 10 mm or less, particularly preferably 5 mm or less. For example, the length along the first direction X of the first joint portion 31 is preferably 0.5 mm or more and 10 mm or less, and more preferably 1 mm or more and 5 mm or less. On the other hand, the length along the second direction Y of the first joint portion 31 is preferably 0.1 mm or more, particularly preferably 0.5 mm or more, and is preferably 15 mm or less, particularly preferably 5 mm or less. For example, the length along the second direction Y of the first joint portion 31 is preferably from 0.1 mm to 15 mm, and more preferably from 0.5 mm to 5 mm.

  Regarding the second joint portion 32, the length of one side thereof is preferably 0.1 mm or more, particularly 0.5 mm or more, and preferably 5 mm or less, particularly 3 mm or less. For example, the length of one side of the second joint portion 32 is preferably 0.1 mm or more and 5 mm or less, and more preferably 0.5 mm or more and 3 mm or less.

  Next, a preferred method for manufacturing the composite sheet 10 having the above-described configuration will be described with reference to FIGS. As shown in FIG. 14, the manufacturing method of the composite sheet 10 includes a first roll 111 having a concavo-convex shape on the peripheral surface, and a concavo-convex shape having a mesh shape with the concavo-convex shape of the first roll on the peripheral surface. While the two rolls 112 are rotated in directions opposite to each other, the first sheet 1 is supplied to the meshing portions of the two rolls 111 and 112 to form the first sheet 1 with irregularities. Further, in the manufacturing method of the composite sheet 10, after the shaping step, the first sheet 1 is held as it is along the peripheral surface portion of the first roll 111 and moved from the meshing portion, and then the second sheet 2 is moved to the first sheet 1. The two sheets 1 and 2 are supplied so as to be superimposed on the sheet 1 and are partially joined by being sandwiched between the convex portion of the first roll 111 and the first heat roll 113 and the second heat roll 114 under heating. A joining step to be performed.

  As shown in FIG. 14, the second roll 112, the first heat roll 113, and the second heat roll 114 are disposed to face the peripheral surface of the first roll 111. The second roll 112, the first heat roll 113, and the second heat roll 114 are arranged in that order from the upstream side in the rotation direction R of the first roll 111 toward the downstream side. Details of the first roll 111 and the second roll 112 whose peripheral surfaces are uneven are described later. The 1st heat roll 113 and the 2nd heat roll 114 are flat anvil rolls which do not have unevenness in a peripheral surface, respectively.

  First, the first sheet 1 is fed out from a raw roll (not shown) of the first sheet 1. Separately from this, the second sheet 2 is fed out from a raw roll (not shown) of the second sheet 2. Then, as shown in FIG. 14, the first sheet 1 that has been fed out is bitten into the meshing portion between the first roll 111 and the second roll 112, and the first sheet 1 is shaped unevenly. At this time, the 1st roll 111 is attracted | sucked toward the roll inside from the surrounding surface, and the uneven | corrugated shaping of the 1st sheet | seat 1 is promoted. The suction mechanism in the first roll 111 will be described later.

  Next, as shown in FIG. 14, the first sheet 1 is continuously sucked onto the peripheral surface of the first roll 111 to keep the shaped state, and the second sheet 2 is overlapped. A pressure is applied between 111 and the first heat roll 113 having a smooth circumferential surface. At this time, both the first roll 111 and the first heat roll 113 or only the first heat roll 113 are heated to a predetermined temperature. As a result, the first sheet 1 and the second sheet 2 positioned on the convex portion of the first roll 111, that is, on the tooth tip surface of each gear (see FIG. 15) described later, are bonded by thermal fusion. Thus, the joint portions 31 and 32 are formed.

  Next, the superposed body of the first sheet 1 and the second sheet 2 joined by heat fusion is moved under the state of being continuously sucked and held on the peripheral surface of the first roll 111, and the superposed body is moved to the first A pressure is applied between the roll 111 and the second heat roll 114 having a smooth circumferential surface. At this time, both the first roll 111 and the second heat roll 114 or only the second heat roll 114 are heated to a predetermined temperature. As a result, the material constituting the first sheet 1 and the second sheet 2 at the joints 31 and 32 located on the convex portions of the first roll 111, that is, on the teeth of each gear, for example, thermoplastic resin. As a result, the joints 31 and 32 are formed more firmly. In this way, the target composite sheet 10 is continuously manufactured.

  In the manufacture of the composite sheet 10 described above, the first roll 111 and the second roll 112 have a central region forming portion that forms the above-described central region M in the composite sheet 10 at the central portion in the axial length direction, The composite sheet 10 provided with the side region forming portions for forming the side regions S, S described above is used on both sides of the central portion in the axial direction.

FIG. 15 is a perspective view showing a state in which the central region forming portion of the first roll 111 shown in FIG. 14 is disassembled. FIG. 16 is a perspective view showing a state where the side region forming portion of the first roll 111 shown in FIG. 14 is disassembled. The first roll 111 is a combination of a plurality of first gears 121, second gears 122, and spacers 123 that are concentrically attached to the shaft core 129 and accumulated in a roll shape. In the first roll 111, the tooth pitch of the first gear 121 and the second gear 122, the arrangement order of the gears 121, 122 and the spacer 123 are different between the central region forming portion and the side region forming portion. In any of the central region forming portion and the side region forming portion, the two types of gears 121 and 122 and the spacer 123 have their shaft centers opened, and a rotating shaft (not shown) is inserted into the openings. Each of the two types of gears 121 and 122 and the spacer 123 has a notch (not shown), and a key (not shown) is inserted into the notch. As a result, the idle rotation of the two types of gears 121 and 122 and the spacer 123 is prevented.

  The spacer 123 has a shape having a beam 125 that is a large number of protrusions extending radially from the center. Each beam 125 in the spacer 123 has the same length. If the diameter of a circle virtually formed by connecting the tips of the beams 125 is defined as the tip circle diameter for convenience, the tip circle diameter is the root circle of the first and second gears 121 and 122. It is smaller than the diameter.

  A plurality of openings 126 and 127 are formed in the gears 121 and 122 so as to surround a central opening into which a rotation shaft (not shown) is inserted. The openings 126 and 127 have the same diameter, and are formed at equal distances from the center of the gear. The angles formed by the adjacent openings 126 and 127 and the center of the gear are almost equal. The number of openings 126 and 127 in each gear 121 and 122 is the same as the number of beams 125 in the spacer 123 described above. When the gears 121 and 122 and the spacer 123 are assembled, the gears 121 and 122 and the spacer 123 are arranged so that the openings 126 and 127 are positioned between the adjacent beams 125 in the spacer 123, respectively. . That is, the openings 126 and 127 are positioned in a substantially V-shaped region constituted by two adjacent beams 125 and the central portion of the spacer 123. In FIG. 15, the entire region of the openings 126 and 127 is included in the substantially V-shaped region. Instead, only a part of the openings 126 and 127 is included in the approximately V-shaped region. It may be included. This substantially V-shaped portion corresponds to a concave portion in the first roll 111 whose peripheral surface has an uneven shape. On the other hand, the concavo-convex convex portions correspond to the tooth tips and tooth bottoms of the gears 121 and 122.

  When the gears 121 and 122 and the spacer 123 are assembled as described above, the opening 126 of the first gear 121 and the opening 127 of the second gear 122 are connected to the axial direction of the first roll 111, A plurality of suction paths (not shown) extending in the direction are formed inside the first roll 111. By connecting this suction path to a suction device installed outside the roll 111 and operating the suction device, the first roll 111 can be sucked inward from the recess formed on the peripheral surface thereof. become.

FIG. 17 shows a state in which the peripheral surface of the central region forming portion of the first roll 111 is developed on a plane. In the figure, the direction indicated by the arrow U is the rotation direction of the first roll 111, and the direction indicated by the arrow V is the axial direction of the first roll 111. Further, in the figure, rectangular regions indicated by fine dots indicate the tooth tip surfaces of the gears 121 and 122. As shown in the figure, the central region forming portion of the first roll 111 is composed of four members, a first gear 121, a second gear 122, a first gear 121, and a spacer 123, in this order, and one cycle T ₁ has an integrated structure in which this period T ₁ is repeated.

  In FIG. 17, the tooth tip surfaces indicated by fine dots are the planned formation positions of the joint portions 31 and 32 in the central region M in the target composite sheet 10. Specifically, the tooth tip surface of the tooth 121 a of the first gear 121 is a position where the second joint portion 32 is to be formed. Further, the tooth tip surface of the tooth 122 a of the second gear 122 is a position where the first joint portion 31 is to be formed. The gears 121 and 122 and the spacer 123 are appropriately arranged so as to obtain the arrangement pattern of the joint portions 31 and 32 as shown in FIG.

  Further, in FIG. 17, the first roll central recessed area 146 </ b> A is a position where the embossed area convex portion 46 is to be formed in the target composite sheet 10, and the first roll first recessed area 141 </ b> A is the target composite sheet 10. It is a formation planned position of the 1st convex part 41 in the center area | region M of. Further, the first roll second recessed area 142A is a position where the second protrusion 42 is to be formed in the central area M of the target composite sheet 10, and the first roll third recessed area 143A is the target composite sheet. It is a formation planned position of the 3rd convex part 43 in the center area | region M of.

FIG. 18 shows a state in which the peripheral surface of the second roll 112 in mesh with the central region forming portion of the first roll 111 is developed on a plane. In the figure, the direction indicated by the arrow U is the rotation direction of the second roll 112, and the direction indicated by the arrow V is the axial direction of the second roll 112.
As shown in FIG. 18, the central region forming portion of the second roll 112 is composed of an integrated body made of the same spacer as the third gear 124, the fourth gear 128, and the spacer 123 of the first roll 111. In the figure, rectangular areas indicated by coarse dots indicate the tooth tip surfaces of the gears 124 and 128. The second roll 112 may not have a suction mechanism. Therefore, it is unnecessary to form the openings 126 and 127 formed in the first gear 121 and the second gear 122 of the first roll 111 in the gear of the second roll 112. Further, it is not necessary for the second roll 112 to form the beam 125 on the spacer 123.

As shown in FIG. 18, a central region forming part of the second roll 112, third gear 124, spacer 123, the fourth gear 128, the four members of the spacer 123 is integrated in this order form the one period _{T 2} the period T ₂ has a repeated formed by integrated structure. The total thickness of the four members forming the cycle T ₂ is the same as the total thickness of the four members forming the cycle T ₁ in the first roll 111.

  In FIG. 18, the second roll center convex portion 146 </ b> B and the second roll second convex portion 142 </ b> B are formed by the teeth 124 a of the third gear 124. The 2nd roll center convex part 146B and the 2nd roll 2nd convex part 142B are located alternately along the U direction. The second roll first convex portion 141 </ b> B is formed by the teeth 122 a of the second gear 122. In a state in which the first roll 111 and the second roll 112 are engaged with each other, the second roll first convex portion 141B is fitted to the first roll first concave portion region 141A. Moreover, the 2nd roll 2nd convex part 142B fits with the 1st roll 2nd recessed part area | region 142A. Further, the second roll center convex portion 146B fits with the first roll center concave region 146A.

  FIG. 19 shows a state in which a state in which the convex portion of the second roll 112 is engaged with the peripheral surface of the central region forming portion of the first roll 111 is developed on a plane. In the same figure, rectangular areas indicated by fine dots indicate the tooth tip surfaces of the gears 121 and 122 in the first roll 111. In addition, rectangular regions indicated by coarse dots indicate the tooth tip surfaces of the gears 124 and 128 in the second roll 112. As is apparent from the drawing, the second roll first convex portion 141B enters the first roll first concave region 141A. The second roll second convex portion 142B enters the first roll second concave portion 142A. Further, the second roll center convex portion 146B enters the first roll center concave region 146A. In contrast, the convex portion of the second roll 112 does not enter the first roll third concave portion 143A.

FIG. 20 shows a state in which the peripheral surface of the side region forming portion of the first roll 111 is developed on a plane. In the figure, the direction indicated by the arrow U is the rotation direction of the first roll 111, and the direction indicated by the arrow V is the axial direction of the first roll 111. Further, in the figure, rectangular regions indicated by fine dots indicate the tooth tip surfaces of the gears 121 and 122. As shown in the drawing, the side region forming portion of the first roll 111 includes the first gear 121, the spacer 123, the first gear 121, the second gear 122, the spacer 123, the second gear 122, the first gear 121, and the spacer 123. , the first gear 121, second gear 122, the 12 members of the spacer 123 and the second gear 122 forms the one period _{T 1} are integrated in this order, have a integrated structure which the period _{T 1} is formed by repeated doing.

  In FIG. 20, the tooth tip surface indicated by fine dots is the planned formation position of the joint portions 31 and 32 of the side region S in the target composite sheet 10. Specifically, the tooth tip surface of the tooth 121 a of the first gear 121 is a position where the second joint portion 32 is to be formed. Further, the tooth tip surface of the tooth 122 a of the second gear 122 is a position where the first joint portion 31 is to be formed. The gears 121 and 122 and the spacer 123 are appropriately arranged so as to obtain the arrangement pattern of the joint portions 31 and 32 as shown in FIG.

  Further, in FIG. 20, the first roll central concave region 146A surrounded by the four teeth 121a of the first gear 121 and the two teeth 122a of the second gear 122 is the central convex portion 46 ′ of the target composite sheet 10. This is the formation position. The first roll first recess area 141A surrounded by one tooth 122a and two teeth 121a arranged along the U direction at a distance in the V direction is a target composite sheet. This is the formation planned position of the first convex portion 41 ′ in the ten side regions S. Further, the first roll second recessed area 142A surrounded by the four teeth 121a is a formation planned position of the second raised section 42 'in the side area S of the target composite sheet 10. Furthermore, the first roll third recess region 143A between the two teeth 121a arranged at a distance in the V direction across the spacer 123 is the third protrusion in the side region S of the target composite sheet 10. This is the position where the portion 43 ′ is to be formed.

  FIG. 21 shows a state in which the peripheral surface of the second roll 112 in mesh with the side region forming portion of the first roll 111 is developed on a plane. In the figure, the direction indicated by the arrow U is the rotation direction of the second roll 112, and the direction indicated by the arrow V is the axial direction of the second roll 112. Moreover, the rectangular area | region shown with the rough dot in the same figure has shown the tooth tip surface of the gearwheels 124 and 122. FIG.

As shown in FIG. 21, the side region forming portion of the second roll 112 includes the third gear 124, the spacer 123, the second gear 122, the second gear 122, the spacer 123, the third gear 124, the spacer 123, and the second gear 122. , second gear 122, no ten members one period T ₂ is integrated in this order of spacer 123, the period T ₂ has a repeated formed by integrated structure. The total thickness of the 10 members forming the cycle T ₂ is the same as the total thickness of the 12 members forming the cycle T ₁ in the first roll 111.

  In FIG. 21, the second roll center convex portion 146 </ b> B and the second roll second convex portion 142 </ b> B are formed by the teeth 124 a of the third gear 124. The 2nd roll center convex part 146B and the 2nd roll 2nd convex part 142B are located alternately along the U direction. The second roll first convex portion 141 </ b> B is formed by the teeth 122 a of the second gear 122. In a state in which the first roll 111 and the second roll 112 are engaged with each other, the second roll first convex portion 141B is fitted to the first roll first concave portion region 141A. Moreover, the 2nd roll 2nd convex part 142B fits with the 1st roll 2nd recessed part area | region 142A. Further, the second roll center convex portion 146B fits with the first roll center concave region 146A.

  FIG. 22 shows a state in which a state in which the convex portion of the second roll 112 meshes with the peripheral surface of the side region forming portion of the first roll 111 is developed on a plane. In the same figure, rectangular areas indicated by fine dots indicate the tooth tip surfaces of the gears 121 and 122 in the first roll 111. In addition, a rectangular region indicated by coarse dots indicates the tooth tip surfaces of the gears 124 and 122 in the second roll 112. As is apparent from the drawing, the second roll first convex portion 141B enters the first roll first concave region 141A. The second roll second convex portion 142B enters the first roll second concave portion 142A. Further, the second roll center convex portion 146B enters the first roll center concave region 146A. In contrast, the convex portion of the second roll 112 does not enter the first roll third concave portion 143A.

And the 1st roll 111 and the 2nd roll 112 have entered the 1st roll 1st crevice field 141A in the 1st roll 1st crevice field 141A in any of a center field formation part and a side field formation part, The first sheet 1 (not shown) is pushed into the first roll 111, and the three-dimensional shaping corresponding to the first convex portions 41 and 41 ′ is performed. Further, the second roll second convex portion 142B enters the first roll second concave region 142A, so that the first sheet 1 (not shown) is pushed into the first roll 111 and the second convex portion 42, Solid shaping corresponding to 42 'is performed. When the second roll central convex portion 146B enters the first roll central concave region 146A, the first sheet 1 (not shown) is pushed into the first roll 111, and the central region forming portion is within the embossed region. In the convex portion 46 and the side region forming portion, the three-dimensional shaping corresponding to the central convex portion 46 ′ is performed. In the first roll third recess area 143A, suction from the third recess area 143A toward the inside of the first roll 111 causes the first sheet 1 (not shown) to move into the third recess area 143A. Three-dimensional shaping is performed by suction.
Then, the target composite sheet 10 is obtained by bonding the second sheet 2 to the first sheet 1 subjected to the three-dimensional shaping.

  The composite sheet 10 obtained as described above is introduced into the production line of the diaper 100, and is used as the top sheet 12 of the disposable diaper 100 by a known method.

Next, the disposable diaper of 2nd Embodiment is demonstrated. As shown in FIG. 23, the composite sheet 10A constituting the top sheet in the disposable diaper of the second embodiment includes a first direction X along the longitudinal direction (article longitudinal direction) Xa of the diaper and the width direction (article width) of the diaper. Direction) and a second direction Y along Ya, and a central continuous convex portion 40A extending in the second direction Y is arranged in the first direction X at the center of the width direction (article width direction) Ya of the diaper. And side regions S each having a mesh-like continuous convex portion 40S ′ formed on both sides of the central region M.
In the central region M of the composite sheet 10A shown in FIG. 23, as shown in FIG. 24, the second joint portions 32 are formed at a constant interval in the first direction X, and the embossed region in-convex portions 46 are viewed in plan view. 4 is substantially circular, has a height and area larger than the convex portion 46 in the embossed region in the composite sheet 10 shown in FIG. 4, a point where the first joint 31 is divided into two joints, and a center continuous The first and second convex portions 41 and 42 constituting the convex portion 40A are different from the composite sheet 10 shown in FIG. As shown in FIG. 24, the first convex portion 41 in the central region M of the composite sheet 10A is larger than the second convex portion 42 in both length and area in the first direction X, and is also higher in height. The central continuous convex portion 40A in the second embodiment is formed by connecting such a first convex portion 41 and a second convex portion 42 in the second direction Y.

Further, in the side region S in the composite sheet 10A shown in FIG. 23, the first joint portion 31 that is long in the first direction X and the second joint portion 32 that is long in the second direction Y are in the form shown in FIG. And a joint group 30A composed of two first joint portions 31 and two second joint portions 32 is formed in a staggered manner. In each of the side regions S, S of the composite sheet 10A, the first sheet in the portion other than the joint group 30A is raised in the direction away from the second sheet, and a mesh-like continuous convex portion 40S ′ is formed. .
26 is a view corresponding to FIG. 19 of the central region forming portion of the first roll and the second roll used for manufacturing the composite sheet 10A, and FIG. 27 is a diagram illustrating the first roll and the second roll used for manufacturing the composite sheet 10A. It is a figure equivalent to FIG. 22 of the side area formation part of a roll. 26 and 27, the rectangular area indicated by fine dots indicates the tooth tip surface of the gear of the first roll 111, and the rectangular area indicated by coarse dots indicates the tooth tip surface of the gear of the second roll 112. Is shown.

  Also in the disposable diaper of 2nd Embodiment, since composite sheet 10A is used as the surface sheet 12, the effect similar to the diaper of 1st Embodiment is show | played. Regarding the disposable diaper of 2nd Embodiment, the point which is not demonstrated especially can be set as the structure similar to the diaper of 1st Embodiment.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, as the surface sheet of the absorbent article, a composite sheet in which the central region M has the same configuration as the composite sheet 10 shown in FIG. 3 and the side region S has the same configuration as the composite sheet 10A shown in FIG. You can also Further, as the surface sheet of the absorbent article, a composite sheet in which the side region S has the same configuration as the composite sheet 10 shown in FIG. 3 and the central region M has the same configuration as the composite sheet 10A shown in FIG. In addition, the absorbent article of the present invention may be a pants-type disposable diaper instead of a deployable disposable diaper, or may be a sanitary napkin, an incontinence pad, a punch liner, or the like. .

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1>
An absorbent article comprising a top sheet made of a composite sheet, a back sheet, and an absorbent body disposed between the two sheets,
The composite sheet has a first direction along the article longitudinal direction and a second direction along the article width direction, and the laminated first sheet and second sheet are partially joined to form a plurality of joints. The first sheet protrudes in a direction away from the second sheet at a portion other than the joint portion, and forms a convex portion protruding toward the wearer's skin side,
The composite sheet has a central region in which central continuous convex portions extending in the second direction are arranged in multiple rows in the first direction at the central portion in the article width direction, and both sides in the second direction sandwiching the central region. In addition, the absorbent article has a side region in which a mesh-like continuous convex portion is formed, and the central continuous convex portion is formed by connecting a plurality of convex portions in the second direction.

<2>
The absorbent article according to <1>, wherein the central continuous convex portion is formed by alternately connecting a plurality of types of convex portions having different lengths or heights in the first direction in the second direction.
<3>
The absorbent article according to <1> or <2>, wherein the mesh-like continuous convex portion is formed by connecting a plurality of convex portions.
<4>
The mesh-like continuous convex portion has a first convex portion and a second convex portion whose height is lower than that of the first convex portion,
The disposable diaper according to the above <3>, wherein the first protrusions formed by connecting the plurality of first protrusions are intermittently connected by the second protrusions.
<5>
The absorptivity according to any one of <1> to <4>, wherein the central continuous convex portion and the mesh-like continuous convex portion are connected at a boundary portion between the central region and the side region. Goods.

<6>
The absorbent body is composed of an absorbent core and a core wrap sheet that wraps the absorbent core, and the absorbent core is provided with the material for forming the absorbent core on each side of the crotch part of the absorbent article. <1> to the above, wherein the side region of the composite sheet overlaps with the whole or a part of the concave notch or penetrating part. The absorbent article according to any one of <5>.
<7>
The absorbent article according to any one of <1> to <6>, wherein the central region and the side regions on both sides thereof are formed at least in the crotch part in the longitudinal direction of the article.
<8>
The absorbent article according to any one of <1> to <7>, wherein the central region and the side regions on both sides thereof extend over the entire length of the absorber.
<9>
The first sheet and the second sheet are non-woven fabric, and the basis weight of the non-woven fabric is preferably 10 g / m ² or more, more preferably 15 g / m ² or more, and preferably 40 g / m ² or less, more preferably The absorbent article according to any one of <1> to <8>, which is 35 g / m ² or less.
<10>
The 1st convex part and 2nd convex part which comprise the said center continuous convex part have a hollow part in each back side, and the hollow part of the back surface of a 1st convex part and the hollow part of the back surface of a 2nd convex part are The absorbent article according to any one of <1> to <9>, wherein a continuous hollow portion extending continuously along the second direction Y is continuously formed on the back side of the central continuous convex portion. .

<11>
Each of the first convex portion and the second convex portion constituting the central continuous convex portion has an elliptical shape in plan view, and the major axis of the first convex portion coincides with the first direction X, The 2nd convex part is an absorptive article given in any 1 of the above-mentioned <1>-<10> whose major axis of an ellipse is in agreement with the 2nd direction Y.
<12>
The central region extends in the second direction and continuously extends in the second direction. The non-embossed region does not have the joint, and extends in the second direction, and the joint is formed in a regular pattern. The absorbent article according to any one of <1> to <11>, wherein the embossed regions formed are alternately formed in the first direction.
<13>
In the joining portion, the first sheet and the second sheet are integrally pressed by embossing, and both the sheets have a higher density than the other parts, <1> to <12 > Any one of>.
<14>
In the embossed region, a first joint row in which the first joint portions are arranged in a row along the second direction Y, and the second joint portion is spaced in the second direction Y. <12> or <13>, wherein the second joint rows arranged in a row are formed, and the second joint rows are formed on both sides of the first joint row in the first direction. Absorbent article as described in 1.
<15>
In the embossed region, rectangular first joints are arranged in a row with their long sides coinciding with the second direction Y and spaced along the second direction Y, thereby A first joint line along the second direction Y is formed, and the second joint part having a rectangular shape has its short side aligned with the second direction Y and spaced along the second direction Y. The absorbent article according to any one of the above <12> to <14>, wherein the absorbent article is disposed in a row and thereby forms a second joint portion row along the second direction Y.

<16>
The arrangement position in the second direction Y is different between the first bonding portion and the second bonding portion, and the length along the second direction Y is also different between the first bonding portion and the second bonding portion. The absorbent article as described in 14> or <15>.
<17>
Each of the first joint portion and the second joint portion has a rectangular shape, and each side of the rectangular shape coincides with the first direction or the second direction, and any one of <14> to <16>. The absorbent article as described.
<18>
In each first junction row, the arrangement interval of the first junctions in the second direction Y is constant, and in each second junction row, the arrangement interval of the second junctions in the second direction Y is 2 The absorbent article according to any one of <14> to <17>, wherein the absorbent article has various types of intervals, and alternately includes wide intervals and narrow intervals.
<19>
The absorptivity according to any one of <12> to <18>, wherein the composite sheet has a discontinuous convex portion in the embossed region surrounded by an annular concave portion in the embossed region. Goods.
<20>
The absorbent article according to any one of <12> to <19>, wherein the embossed region convex portion and the second convex portion are formed at the same position in the second direction.

<21>
In the central region, the second convex portion, the third convex portion, the embossed region inner convex portion, and the third convex portion are regularly and linearly arranged along the first direction X in this order. The absorbent article according to any one of <1> to <20>.
<22>
The first convex portion, the second convex portion, the third convex portion, and the embossed region inner convex portion are formed on the first sheet constituting the central region of the composite sheet, and the third convex portion is the first convex portion. The absorbent article according to any one of <1> to <21>, wherein the height is lower than any of the second convex portion and the convex portion in the embossed region.
<23>
When the height of the first convex part is H1, the height of the second convex part is H2, the height of the third convex part is H3, and the height of the convex part in the embossed region is H4, these are the following (1) And the absorbent article of any one of said <1>-<22> satisfy | filling the relationship of (2) or (1)-(3).
(1) H1 ≧ H2
(2) H1> H4, H2 ≧ H4
(3) H4 ≧ H3
<24>
<1> to <23, in which a first convex portion, a second convex portion, and a third convex portion, which are three types of convex portions having different heights, are formed on the first sheet constituting the side region. > Any one of>.
<25>
A first convex portion, a second convex portion, and a third convex portion are formed in the side region, and the height of the first convex portion is H ₁ , the height of the second convex portion is H ₂ , and the third convex portion. when the height of the section was _{H 3,} satisfy the relationship of _{H 1 ≧ H 2> H 3} , the <1> to absorbent article according to any one of <24>.

<26>
In the side region, a plurality of first direction continuous convex portions are formed by connecting the first convex portions to each other in the first direction X, and between the first direction continuous convex portions adjacent in the second direction Y. However, any one of the above <1> to <25>, in which a mesh-like continuous convex portion is formed by being intermittently connected by the second convex portion arranged intermittently in the first direction X Or an absorbent article according to claim 1.
<27>
The first direction continuous convex portions are preferably formed in two or more rows in each of the left and right side regions, more preferably in three rows or more, and preferably in 20 rows or less, more preferably in 10 rows. The absorbent article according to any one of the above items <1> to <26>, which is formed in rows or less.
<28>
The annular connection convex part which one or more 1st convex parts and one or more 2nd convex parts connected with the said side area is formed in any one of said <1>-<27>. Absorbent articles.
<29>
The annular connecting convex portions are arranged in a line in a straight line at a certain distance along the first direction X to form an annular connecting convex portion row, and the annular connecting convex portion row is The absorbent article according to any one of <1> to <28>, wherein the absorbent article is arranged in multiple rows at a constant distance in two directions Y.
<30>
The absorbent article according to any one of <1> to <29>, wherein a central convex portion is formed at a substantially center in the ring of the annular coupling convex portion.

<31>
In the side area, the height H ₄ of the central convex portion, the second has become almost the height of H ₂ protrusions same, the <1> to absorption according to any one of <30> Sex goods.
<32>
A plurality of the central convex portions are arranged in a straight line at a certain distance along a first direction which is one direction in the plane of the composite sheet to constitute a central convex row. And the said center convex part row | line | column is an absorbent article in any one of said <1>-<31> arrange | positioned in multiple rows at a fixed distance in the 2nd direction Y.
<33>
In the side region, the second convex portion and the central convex portion are alternately and linearly arranged along the first direction X, which is one direction in the plane of the composite sheet, <1> The absorbent article according to any one of ~ <32>.
<34>
In the side region, the second convex portion, the third convex portion, the central convex portion, and the third convex portion are regularly arranged in this order along the first direction X that is one direction in the plane of the composite sheet. And the absorbent article of any one of said <1>-<33> arrange | positioned linearly.
<35>
The absorbent article according to any one of <1> to <34>, wherein the side region of the composite sheet overlaps the entire region of a notch portion that is concave in plan view.
<36>
The height H1 of the first convex portion of the central continuous convex portion is ½ or more and 2/1 or less of the height H1 of the first convex portion having the maximum height constituting the continuous convex portion, < The absorbent article according to any one of 1> to <35>.
<37>
The absorption according to any one of <1> to <36>, wherein the non-embossed region has a length in the first direction of 20% to 100% of a length Le in the same direction of the embossed region. Sex goods.

100 disposable diapers (absorbent articles)
12 Top sheet 10, 10A Composite sheet 1 First sheet 2 Second sheet M Central region 40, 40A Central continuous convex portion 41 First convex portion in central region 42 Second convex portion in central region 43 Third convex portion in central region 46 Embossed area inner convex part S Side area 40S, 40S ′ Mesh-like continuous convex part 41 ′ Side area first convex part 42 ′ Side area second convex part 43 ′ Side area third convex part 46 ′ Central convex part Part 13 Back sheet 14 Absorbent body 111 First roll 112 Second roll 113 First heat roll 114 Second heat roll

Claims (4)

An absorbent article comprising a top sheet made of a composite sheet, a back sheet, and an absorbent body disposed between the two sheets,
The composite sheet has a first direction along the article longitudinal direction and a second direction along the article width direction, and the laminated first sheet and second sheet are partially joined to form a plurality of joints. The first sheet protrudes in a direction away from the second sheet at a portion other than the joint portion, and forms a convex portion protruding toward the wearer's skin side,
The composite sheet has a central region in which central continuous convex portions extending in the second direction are arranged in multiple rows in the first direction at the central portion in the article width direction, and both sides in the second direction sandwiching the central region. And having a side region formed with a mesh-like continuous convex portion, and the central continuous convex portion is formed by connecting a plurality of convex portions in the second direction,
A continuous hollow portion extending continuously along the second direction is formed on the back side of the central continuous convex portion ,
The absorbent article, wherein the central continuous convex portion is formed by alternately connecting a plurality of types of convex portions having different lengths or heights in the first direction in the second direction . An absorbent article comprising a top sheet made of a composite sheet, a back sheet, and an absorbent body disposed between the two sheets,
The composite sheet has a first direction along the article longitudinal direction and a second direction along the article width direction, and the laminated first sheet and second sheet are partially joined to form a plurality of joints. The first sheet protrudes in a direction away from the second sheet at a portion other than the joint portion, and forms a convex portion protruding toward the wearer's skin side,
The composite sheet has a central region in which central continuous convex portions extending in the second direction are arranged in multiple rows in the first direction at the central portion in the article width direction, and both sides in the second direction sandwiching the central region. And having a side region formed with a mesh-like continuous convex portion, and the central continuous convex portion is formed by connecting a plurality of convex portions in the second direction,
A continuous hollow portion extending continuously along the second direction is formed on the back side of the central continuous convex portion,
The mesh-like continuous convex portion is also formed by connecting a plurality of convex portions,
The mesh-like continuous convex portion has a first convex portion and a second convex portion whose height is lower than that of the first convex portion,
A disposable diaper in which a plurality of first protrusions formed by connecting a plurality of first protrusions are intermittently connected by a second protrusion. The absorbent article according to claim 1 or 2 , wherein the central continuous convex portion and the mesh-like continuous convex portion are connected to each other at a boundary portion between the central region and the side region. The absorbent body is composed of an absorbent core and a core wrap sheet that wraps the absorbent core, and the absorbent core is provided with the material for forming the absorbent core on each side of the crotch part of the absorbent article. have not been, has a notch or a through portion in a plan view recessed, the side area of the composite sheet, overlaps the whole or part of the concave cutout portion or through unit, according to claim 1 to 3 The absorbent article according to any one of the above.