JP6083909B2 - 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, a technique is also known in which a concave-convex shape is formed on the skin side surface of the surface sheet to form a space between the skin of the wearer and dissipate moisture generated by excreted urine and menstrual blood.

  As a conventional technique related to a surface sheet having a three-dimensional shape, Patent Document 1 discloses a fiber sheet having a heat-shrinkable fiber layer containing heat-shrinkable heat-shrinkable fibers and having a plurality of embossed portions, A hemispherical high convex part having a high height, a hemispherical low convex part having the lowest height, and a hemispherical middle convex part having a height lower than the high convex part and higher than the low convex part. And having a plurality of each. In the fiber sheet, a first convex row formed by arranging a plurality of middle convex portions in the first direction and a second convex row formed by arranging a plurality of high convex portions in the first direction; Are alternately arranged in the second direction orthogonal to the first direction, the high convex portions are surrounded by four middle convex portions, and the plurality of low convex portions are adjacent to the middle convex portions in the first direction. It is distribute | arranged for every interval between the high convex parts which are adjacent in the 2nd direction.

  Further, in Patent Document 2, an embossed recess having a substantially rectangular shape or a substantially elliptical shape is formed on the surface of the top sheet of the absorbent article, and an embossed row composed of a plurality of embossed recesses is provided at the end in the longitudinal direction of the absorbent article. An absorbent article is described in which the side and the center are arranged in different directions.

JP 2014-70299 A JP 2004-298271 A

  However, when applying a three-dimensional shape to the topsheet, depending on the pattern of the three-dimensional shape, the topsheet is compressed in the width direction of the absorbent article along with the deformation of the absorbent article at the time of wearing, and the uneven projections are crushed. By deforming, the moisture dissipating effect due to the unevenness may not be sufficiently exhibited.

  Therefore, 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 top sheet has a first direction and a second direction perpendicular thereto. And the first direction coincides with the longitudinal direction of the article along the wearer's front-rear direction when worn, and the composite sheet is partially joined by embossing the laminated first sheet and second sheet A plurality of joints are formed, and the first sheet projects in a direction away from the second sheet in a portion other than the joints, and forms a plurality of convex portions projecting toward the wearer's skin side. And the composite sheet has a non-embossed region extending in the second direction and not continuously having the joint in the second direction, and extending in the second direction, and the joint has a regular pattern. Embossed area formed with Are formed alternately in the first direction, and the two embossed regions sandwiching the individual non-embossed regions are respectively the end portions of the joints closest to the non-embossed regions in the respective parts in the second direction. The shape of the convex contour forming line formed by connecting the midpoints with a straight line is a polygonal line having a distal point and a proximal point having different distances from the non-embossed region in a second direction, In the non-embossed region, a continuous convex portion extending continuously in the second direction is formed as the convex portion, and the continuous convex portion has a portion whose width is regularly narrowed in the second direction, Any of the joint portions constituting the embossed region provides an absorbent article in which neither the tangent line extending in the first direction nor the tangent line extending in the second direction intersects with another joint portion constituting the embossed region. Is.

  According to the absorbent article of the present invention, even if it is deformed in the wearing state, moisture dissipating property in the article width direction by the top sheet is maintained well, and stuffiness is hardly generated.

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 partially broken perspective view showing a part of a composite sheet preferably used as a surface sheet of the absorbent article of the present invention in an enlarged manner. FIG. 4 is an enlarged plan view showing a part of a composite sheet preferably used as a surface sheet of the absorbent article of the present invention. 5A is a sectional view taken along the line Va-Va in FIG. 4, FIG. 5B is a sectional view taken along the line Vb-Vb in FIG. 4, and FIG. 5C is a sectional view taken along the line Vc-Vc in FIG. It is. FIG. 6 is an enlarged plan view showing a main part of the composite sheet shown in FIG. FIG. 7 is an enlarged plan view showing a main part of the composite sheet shown in FIG. FIG. 8A is an enlarged plan view showing the main part of the composite sheet shown in FIG. 3, and FIG. 8B extends in the first direction or the second direction of the joining portion constituting the embossed region. It is a top view (figure 8 (a) equivalent figure) showing an example in case a tangent line intersects with other joined parts which constitute an embossed field. FIG. 9 is an explanatory diagram of the function and effect of the present invention, and is a photograph of a cross section taken along the first direction of the composite sheet shown in FIG. FIG. 10 is a schematic view showing an apparatus suitably used for manufacturing the composite sheet shown in FIG. FIG. 11 is a perspective view of a part of the apparatus shown in FIG. 10 with the first roll disassembled. FIG. 12 is a diagram in which the peripheral surface of the first roll in the apparatus shown in FIG. 10 is developed in a plane. FIG. 13 is a diagram in which the peripheral surface of the second roll in the apparatus shown in FIG. 10 is developed in a plane. 14 is a diagram in which the peripheral surface of the first roll shown in FIG. 12 and the convex part of the second roll shown in FIG. FIG. 15 is an enlarged plan view (corresponding to FIG. 4) showing another example of the composite sheet preferably used as the surface sheet of the absorbent article of the present invention. 16 is an enlarged plan view showing a main part of the composite sheet shown in FIG. FIG. 17 is an enlarged plan view showing a main part of the composite sheet shown in FIG. FIG. 18 is a plan view showing a back side portion of a disposable diaper having a more preferable configuration in addition to the basic configuration shown in FIG. 1. FIG. 19 is a schematic plan view showing a preferred arrangement of continuous convex portions and elastic members in an elastic member arrangement region formed on the back side of the disposable diaper shown in FIG.

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 abdomen 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 of the article longitudinal direction Xa in the diaper 100, and the skin of the wearer is placed on the crotch portion C in a worn state by contraction of the elastic members 15a. A three-dimensional gather standing up toward the side 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

  As for the diaper 100, the surface sheet 12 is comprised from the composite sheet 10 shown in FIG.3 and FIG.4. FIG. 3 is a partially broken perspective view showing a part of the composite sheet 10 in an enlarged manner.

  As shown in FIG. 3, the composite sheet 10 is formed by a plurality of first and second sheets 1 and 2 being partially joined by embossing to form a plurality of joints. It protrudes in the direction away from the 2nd sheet | seat 2 in parts other than this junction part, and forms the some convex part which protrudes toward a wearer's skin side. The composite sheet 10 has a substantially flat surface on the second sheet 2 side, and has large undulations 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.

The composite sheet 10 has a first direction X and a second direction Y orthogonal to the first direction X in the plane of the sheet. When the composite sheet 10 is incorporated in the diaper 100, the first direction X is the longitudinal direction of the diaper 100. The second direction Y coincides with the direction (article longitudinal direction) Xa, and the second direction Y coincides with the width direction (article width direction) Ya of the diaper 100.
In the composite sheet 10, the first direction X generally coincides with the feed direction of the original fabric of the first sheet 1 and the second sheet 2 in many cases. When the first sheet 1 and the second sheet 2 are, for example, non-woven fabrics, the first direction X of the composite sheet 10 often coincides with the main fiber orientation direction of the fibers constituting the non-woven fabric. Further, the first direction X of the composite sheet 10 is also a transport direction (MD) when the composite sheet 10 is manufactured by a method described later.

FIG. 4 shows a plan view of the composite sheet 10 shown in FIG. 5A to 5C 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. 6 is an enlarged plan view showing a part of FIG. 4 in an enlarged manner.
As shown in FIG. 3 and FIG. 4, the composite sheet 10 is formed with a plurality of continuous convex portions 40 extending continuously in the second direction Y as the convex portions at a certain distance in the first direction X. Has been. Each of the 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. 4 and 5A. ing. 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 first convex portion 41 and the second convex portion 42 have a hollow portion on each back side, and the hollow portion on the back surface of the first convex portion 41 and the hollow portion on the back surface of the second convex portion 42 are continuous, A continuous hollow portion 40 </ b> V that extends continuously along the second direction Y is formed on the back side of the continuous convex portion 40.
As shown in FIG. 6, the first convex portion 41 and the second convex portion 42 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.
In the composite sheet 10, the surface on the first sheet 1 side facing the wearer's skin in the state of being incorporated in the diaper 100 is formed with a plurality of continuous convex portions 40 and has an uneven shape. The surface on the second sheet 2 side facing the absorber 14 side is generally flat.

As shown in FIG. 4, the composite sheet 10 extends in the second direction Y, extends in the second direction Y, and a non-embossed region N that does not have a joint continuously in the second direction Y. Embossed regions E in which the joint portions are 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.

As shown in FIG. 6, the first joining portion 31 and the second joining portion 32 in the present embodiment are different in arrangement position in the second direction Y. 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. The first joint portion 31 and the second joint portion 32 both have a rectangular shape in plan view, 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.

In addition, as shown in FIG. 7, the two embossed regions E sandwiching the individual non-embossed regions N are respectively the midpoints of the end portions of the joints closest to the non-embossed regions N in the respective parts in the second direction Y. The shape of the convex contour forming line Lt formed by connecting the lines with a straight line is a polygonal line having a distal point P1 and a proximal point P2 with different distances from the non-embossed region N in the second direction Y repeatedly. The convex contour forming line Lt determines the schematic shape of the contour extending in the second direction Y of the continuous convex portion 40 formed in the non-embossed region N.
As shown in FIG. 7, the midpoint of the end of the joint closest to the non-embossed region N is the non-embossed region N of the first joint 31 at the site where the first joint 31 is present in the second direction Y. Is the midpoint of the side facing the non-embossed region N of each of the second joints 32 in the portion where the second joint 32 is present in the second direction Y. When joints having the same position in the first direction X on the side facing the non-embossed region N are lined up in the second direction Y without any other joints, like the second joint 32, one joint A midpoint between the midpoint of the side of the part and the midpoint of the side of the other joint is defined as a proximal point P2.

  The composite sheet 10 has, as described above, the second direction Y in the non-embossed region N by having the convex contour line Lt having the shape described above in each of the two embossed regions E sandwiching the non-embossed region N. And a continuous convex portion 40 having a portion whose width is regularly narrowed in the second direction Y is formed. Specifically, as shown in FIG. 7, the first convex portion 41 of the continuous convex portion 40 is formed between the distal points P1 of the pair of convex portion contour forming lines Lt facing each other across the non-embossed region N. The second convex portion 42 of the continuous convex portion 40 is formed between the proximal points P2 of the pair of convex portion contour forming lines Lt facing each other across the non-embossed region N, and the direction along the first direction X , The length L42 of the second convex portion 42 is shorter than the length L41 of the first convex portion 41. In the continuous convex portion 40, the portion formed by the second convex portion 42 is a constricted portion whose width (length in the first direction X) is narrower than the portion formed by the first convex portion 41.

In addition, the joining portions 31 and 32 constituting the embossed region E in the composite sheet 10 are other joining portions constituting the embossed region E for both the tangent extending in the first direction X and the tangent extending in the second direction Y, respectively. And do not cross.
That is, when attention is paid to one first joint portion 31A shown in FIG. 8A, the first joint portion 31A includes two tangent lines C1 and C2 extending in the first direction X and the second direction Y. The two tangent lines C3 and C4 extending in the direction are considered, and these tangent lines C1 to C4 are connected to the other first and second joint portions 31 and 32 of the embossed region EA including the first joint portion 31A. It does not intersect with any of them, nor does it intersect with the first joint portion 31 or the second joint portion 32 of an emboss area E different from the emboss area EA. The same can be said for all the first joint portions 31.
When attention is paid to one second joint portion 32A shown in FIG. 8A, the second joint portion 32A includes two tangent lines C5 and C6 extending in the first direction X and a second direction Y. The two tangent lines C7 and C8 extending in the direction of the first tangent line C7 and C8 are considered. And the first joint portion 31 and the second joint portion 32 in an emboss region E different from the emboss region EA do not intersect. The same can be said for all the second joint portions 31.

In the case of “not intersecting with other joints”, as shown in FIG. 8A, tangents C1 and C2 extending in the first direction X of the first joint 31 are the second joint 32. Or the tangent lines C3 and C4 extending in the second direction Y of the first joint portion 31 are end portions 32f along the second direction Y of the second joint portion 32. The case where it overlaps with is also included.
On the other hand, as shown in FIG. 8B, two tangents C1 and C2 along the first direction X of one first joint 31A correspond to the first joint 31B or the second in the other embossed region E. When crossing the joint 32B, or the two tangents C3 and C4 along the second direction Y of the first joint 31A constitute another joint group 30 in the same embossed region. When it intersects with the first joint portion 31 or the second joint portion 32, it does not correspond to “does not intersect with other joint portions”.

  As shown in FIGS. 4 and 6, the composite sheet 10 used in the present embodiment has a discontinuous embossed region in-projection 46 surrounded by an annular recess in the embossed region E. The embossed region in-convex portion 46 has a shape having a top portion in both cross sections in 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. 3, 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 kinds of convex portions are the second convex portion 42 and the third convex portion. 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. 6, 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.

In the composite sheet 10 used in the present embodiment, the first convex portion 41, the second convex portion 42, the third convex portion 43, and the convex portion 46 in the embossed region described above are formed on the first sheet 1 constituting the composite sheet 10. ing. 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 convex portion 46 in the embossed region.
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

  The 1st junction part 31 and the 2nd junction part 32 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 the present embodiment, the composite sheet 10 having the above configuration is used as the top sheet 12 with the first direction X in the article longitudinal direction Xa and the second direction Y in the article width direction Ya. Moisture generated from the wearer's sweat, urine excreted in the wearing state, and the like is efficiently diffused and diffused in the width direction of the diaper along the continuous convex portion 40. In addition, the non-embossed region N in which the continuous convex portion 40 is formed is sandwiched between embossed regions E and E having high rigidity, so that the diaper 100 has an arcuate cross section along its longitudinal direction during wearing. Even if it is bent in the longitudinal direction, the convex cross-sectional shape of the continuous convex portion 40 is stably maintained (see FIG. 9). Since the convex cross-sectional shape is stably maintained, the gap formed between the skin and the continuous convex portion 40 is maintained, so that the dispersibility is improved. Moreover, since the continuous convex part 40 has a regular constriction part along the 2nd direction Y, even if the force which compresses in the width direction is applied to the diaper 100 by the thigh, the constriction part shrinks. Therefore, the deformation of the portions other than the constricted portion of the continuous convex portion 40 is suppressed. Furthermore, since the arrangement of the joints in the embossed region E is made so that the tangent line of the joints does not intersect with other joints, bending points are formed in the embossed region E, and the composite sheet 10 is easily bent in the embossed region E. Thus, the convex three-dimensional shape of the continuous convex portion 40 is more stably maintained. According to the diaper 100 of the present embodiment, in this way, the dispersibility of the moisture in the width direction by the continuous convex portion 40 is stably maintained during wearing, and a comfortable wearing feeling that is unlikely to cause stuffiness or the like is obtained.

Moreover, the composite sheet 10 used in the present embodiment has the discontinuous embossed region in-region convex portion 46 surrounded by the annular concave portion in the embossed region E as described above. Therefore, when the composite sheet 10 is curved in the first direction X, the continuous convex portion 40 is supported, and the shape of the continuous convex portion 40 is further maintained.
Moreover, since the shape of the junction parts 31 and 32 which comprise the embossing area | region E is square shape or rectangular shape in planar view, it is that the composite sheet 10 bends in diagonal directions other than the 1st direction X or the 2nd direction Y. To prevent the continuous convex portion 40 from being crushed.

  From the viewpoint of balancing the air permeability and the maintainability of the shape of the continuous convex portion, the non-embossed region N has a length Ln in the first direction X of 20% or more of the length Le in the same direction of the embossed region E 100 % Or less, more preferably 30% or more and 90% or less. The length Ln along the first direction X of the non-embossed region N is 1 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 15 mm or less, particularly preferably 10 mm or less, and 1 mm or more and 15 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, from the viewpoint of improving the shape stability of the continuous convex portion 40, the distance LP1 between the distal points P1 along the first direction X (same as the length along the first direction X of the first convex portion 41) is The distance LP2 between the proximal points P2 along the first direction X (same as the length along the first direction X of the second protrusion 42) is preferably 120% or more, more preferably 150% or more. 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 distal point P1 or the proximal point P2 in the second direction Y (same as the distance between the centers of the constricted portions of the continuous convex portion 40) is the arrangement pitch of the embossed region E or the non-embossed region N in the first direction. It is preferably 20% or more and 200% or less, and more preferably 40% or more and 150% or less (the same as the distance between the center positions of the continuous protrusions 40 in the first direction).
Further, the pitch of the distal point P1 or the proximal point P2 in the second direction Y (same as the distance between the centers of the constricted portions of the continuous convex portion 40) is preferably 0.4 mm or more, more preferably 2 mm or more, Moreover, it is preferably 40 mm or less, more preferably 20 mm or less, and preferably 0.4 mm or more and 40 mm or less, more preferably 2 mm or more and 20 mm or less.

  In addition, the length L3 along the first direction X of the first joint portion 31 is preferably 0.1 mm or more, particularly 0.3 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 L1 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.

  The length of the second joint portion 32 along the first direction X 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. 6). It is preferably 1 time or more, particularly 1.5 times or more, preferably 10 times or less, particularly preferably 8 times or less, with respect to the interval between the joint portions 32 (same as the length L5 of the gap). It is preferably 1 to 10 times, particularly preferably 1.5 to 8 times.

In the composite sheet 10, as described above, in each embossed region E, the first joint portion 31 is arranged in a row at intervals along the second direction Y, and the first joint portion row R1. The second joint portion 32 is formed in the first direction X in the first direction X, and the second joint portion R2 is formed in the first direction X. It is formed on both sides of the joint row R1. As shown in FIG. 4, in each embossed region E, a joint group 30 having a configuration in which one first joint 31 is surrounded by four second joints 32 is arranged in series in the second direction Y. A plurality are formed in such a state.
From the viewpoint of improving the shape retention of the continuous convex portion 40, the first joint portion row R1 in the composite sheet 10 is the total length of the first joint portions 31 in the second direction Y, and the first joint portion row R1 has the total length. The joint ratio (%), which is a ratio with respect to the length in the two directions Y, is preferably 10% or more and 80% or less, and more preferably 20% or more and 70% or less.

The joint ratio (%) is obtained by the following method.
That is, in a state where the composite sheet 10 is viewed from the surface on the second sheet side, a straight line Lm parallel to the second direction Y is drawn in the embossed region E (see FIG. 4). The straight line Lm is drawn so as to pass over the first joint portion 31 that is a joint portion located at the center portion in the first direction in the embossed region E.
Then, as shown in FIG. 4, the length Lp (same as L2 + L1 + L2 + L5 in FIG. 6) corresponding to one arrangement pitch in the second direction of the joint group 30 is one unit, and the length of the straight line Lm for five units. Measure the thickness. The part (first joint 31) that has been heat-fused and solidified by embossing in a straight line for 5 units is visually confirmed, and the length that overlaps the straight line Lm of the part (first joint 31) is measured, The ratio of the total length to the total length of 5 units is calculated. When it is difficult to measure with the naked eye, the measurement may be performed by observing at a magnification of 20 to 100 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE).

  Regarding the two second joint rows R2 sandwiching the first joint row R1 in the composite sheet 10, the joint ratio (%) is preferably 10% or more and 80% or less, more preferably 20% or more. 70% or less. The joint ratio (%) of the second joint row is the total length of the second joints 32 constituting the second joint row R2 in the second direction Y, and the second direction Y of the second joint row R2. It is a ratio with respect to the length of, and the same measurement is performed by drawing a straight line parallel to the second direction overlapping the second joint portion 32.

  In the absorbent article of the present invention, although not shown, in combination with the top sheet 12 made of the sheet 10, the absorbent body has one or more longitudinal grooves along the article longitudinal direction Xa, or the article width direction Ya. It is preferable to use an absorbent body having an absorbent core having one or a plurality of transverse groove portions along the line. Further, the plurality of parallel longitudinal groove portions and the plurality of parallel transverse groove portions intersect in a lattice shape, and 2 It is preferable to use an absorptive core in which a plurality of liquid absorbing portions surrounded by two vertical groove portions and two horizontal groove portions are formed in the in-plane direction. Such vertical groove portions or horizontal groove portions may be formed in the entire area of the absorbent core when viewed in plan, and a part of the absorbent core, for example, any of the ventral side, the back side, and the crotch Although it may be formed only in the portion arranged on the sheet, it is preferably formed at least in a portion overlapping with the composite sheet 10. By combining and using the absorber which is easy to deform | transform, it can prevent further that the continuous convex part 40 of the composite sheet 10 is crushed or deform | transformed. It is preferable that a liquid absorption part has a higher density than the bottom part of a horizontal groove part or a vertical groove part located between liquid absorption parts. The structure and manufacturing method of such an absorber are described in, for example, JP2013-255558A, JP2013-255567A, and the like. Moreover, you may use such an absorber with either a vertical groove part or a horizontal groove part facing either a surface sheet side or a back surface sheet side.

  Next, a preferred method for manufacturing the composite sheet 10 of the present embodiment will be described with reference to FIGS. As shown in FIG. 10, 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. 10, 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. 10, the first sheet 1 that has been fed out is engaged with the meshing portion of the first roll 111 and the second roll 112, and the first sheet 1 is unevenly shaped. At this time, the 1st roll 111 is attracted | sucked toward the inside of a roll 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. 10, the first sheet 1 is continuously sucked to the peripheral surface of the first roll 111 to keep the shaped state, and the second sheet 2 is superposed, and the superposed one is the first roll. 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 portions of the first roll 111, that is, on the tooth tip surfaces of the respective gears (see FIG. 11) to be described later, are joined 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.

  FIG. 11 shows a perspective view of a part of the first roll 111 in FIG. 10 in an exploded state. 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 124 and integrated in a roll shape. The order of arrangement of the gears 121 and 122 and the spacer 123 will be described later. Both the gear 121 and the spacer 123 have the same width (tooth width), and the gear 122 has a width (tooth width) approximately twice that of the gear 121 and the spacer 123. The two types of gears 121 and 122 and the spacer 123 have their axes 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. 11, the entire area 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 area. 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. 12 shows a state where the peripheral surface 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 first roll 111, the first gear 121, second gear 122, first gear 121, and form a four member is integrated in this order one period _{T 1} of the spacer 123, the period T ₁ is has a repeated formed by integrated structure.

  In FIG. 12, the tooth tip surfaces indicated by fine dots are the planned positions for forming the joint portions 31 and 32 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. 4 described above.

  Further, in FIG. 12, the first roll center recessed area 146A is a position where the embossed area in-convex section 46 is to be formed in the target composite sheet 10, and the first roll first recessed area 141A is the target composite sheet 10. This is the position where the first convex portion 41 is to be formed. In addition, the first roll second recessed area 142A is a position where the second convex portion 42 is to be formed in the target composite sheet 10, and the first roll third recessed area 143A is the third position in the target composite sheet 10. This is a position where the convex portion 43 is to be formed.

FIG. 13 shows a state in which the peripheral surface of the second roll 112 in mesh with 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. 13, the second roll 112 is composed of an integrated body composed of the third gear 124, the fourth gear 128, and the same spacer as 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. 13, 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 an 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. 10, the second roll center convex portion 146B and the second roll second convex portion 142B are formed by the teeth 124a 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. 14 shows a state in which the peripheral surface of the first roll 111 is engaged with the convex portion of the second roll 112 in a flat 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.

  And the 1st sheet 1 (not shown) is pushed in in the 1st roll 111 by the 2nd roll 1st convex part 141B entering into the 1st roll 1st crevice area 141A, and it is in the 1st convex part 41. Corresponding solid shaping is performed. Further, the second roll second convex portion 142B enters the first roll second concave portion 142A, so that the first sheet 1 (not shown) is pushed into the first roll 111 and becomes the second convex portion 42. Corresponding solid shaping is performed. The three-dimensional shaping corresponding to the embossed region 46 in which the first sheet 1 (not shown) is pushed into the first roll 111 by entering the second roll central convex portion 146B into the first roll central recessed region 146A. Is done. 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.

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, the composite sheet used as the top sheet in the absorbent article of the present invention may be a composite sheet 10J shown in FIG.
In the composite sheet 10J shown in FIG. 15, the second joining portions 32 are formed at regular intervals in the first direction X, and the shape of the embossed region in-convex portions 46 in a plan view is substantially circular, and is shown in FIG. 4. A point where the height and area are larger than the convex portion 46 in the embossed region in the composite sheet 10, a point where the first joint portion 31 is divided into two joint portions, a first convex portion 41 constituting the continuous convex portion 40, and The shape and size of the second convex portion 42 in plan view are different from the composite sheet 10 shown in FIG. On the other hand, non-embossed regions N having no joints in the second direction Y and embossed regions E in which the joints are formed in a regular pattern in the second direction Y are alternately arranged in the first direction X. As shown in FIG. 16, in the two embossed areas E sandwiching the individual non-embossed areas N, the joints closest to the non-embossed areas N in the respective portions in the second direction Y are respectively shown. The shape of the convex contour forming line Lt formed by connecting the ends with a straight line is a polygonal line having a distal point P1 and a proximal point P2 having different distances from the non-embossed region N in the second direction Y. A plurality of continuous convex portions 40A extending continuously in the second direction Y are formed at a constant distance in the first direction X, and the continuous convex portions 40A are respectively formed in the second direction Y in the second direction Y. The part which consists of 2 convex parts 42 was bundled regularly In a certain point, as shown in FIG. 17, the joining portions 31 and 32 constituting the embossed region E in the composite sheet 10 are embossed regions for both the tangent line extending in the first direction X and the tangent line extending in the second direction Y, respectively. The composite sheet 10 is the same as the composite sheet 10 shown in FIG. 4 in that it does not intersect with other joints constituting E.
Therefore, for example, according to the disposable diaper of another embodiment of the present invention in which the composite sheet 10J is used as the top sheet of the above-described disposable diaper 100 with the first direction X aligned with the article longitudinal direction Xa, FIG. The same effect as that obtained when the composite sheet 10 shown in FIG.

The disposable diaper 100 as one embodiment of the present invention is an elastic member arrangement region in which a plurality of elastic members 19 are arranged at least in the center in the width direction of the back side portion B, like a disposable diaper 100A shown in FIG. It is preferable to provide BM.
The fastening tape 17 in the disposable diaper 100A shown in FIG. 18 includes a tape base material 17a and a male member of a mechanical surface fastener that is joined to the tape base material 17a to form a fastening portion 17c. The back sheet 13 is formed by joining a female member of a mechanical surface fastener or a non-woven fabric with high engagement. A part of the tape base material 17a of the fastening tape 17 forms a fixing portion 17b fixed in a state of being sandwiched between the back sheet 13 and the three-dimensional gather forming sheet 15. Between the left and right fastening tapes 17, 17, a plurality of thread-like or string-like elastic members 19 that contract the diaper 100 </ b> A in the width direction Ya are arranged at intervals in the longitudinal direction Xa of the diaper 100 </ b> A. . The plurality of elastic members 19 are arranged as an elastic sheet 19s configured to be fixed between two nonwoven fabrics or two folded nonwoven fabrics, and are included in the end portion of the elastic sheet 19s or the elastic sheet 19s. It is preferable that the end portion of each elastic member 19 overlaps the fixing portion 17b. The plurality of elastic members 19 are preferably arranged at regular intervals in the article longitudinal direction Xa. The fastening portion 17c of the fastening tape 17 may be an adhesive portion formed by applying an adhesive to the tape base material 17a. As the tape base material 17a, various known materials such as a nonwoven fabric are used.

The top sheet 12 of the disposable diaper 100A shown in FIG. 18 is composed of the composite sheet 10 described above or the composite sheet 10J described above.
The composite sheets 10 and 10J are preferably formed with a plurality of the above-described continuous convex portions 40 and 40A extending in the second direction Y in the elastic member arrangement region BM, as shown in FIG. More preferably, the relationship of P1 <P2 <P3 is satisfied, where P1 is the width of the protrusion, P2 is the distance between the elastic members 19, and P3 is the distance between the central portions of the continuous protrusions. The width P1 of the continuous convex portion is a distance LP2 between the proximal points P2 along the first direction X, and is the same as the length Ln of the non-embossed region N in the first direction X described above. FIG. 19 shows the case where the composite sheet constituting the top sheet 12 is the composite sheet 10, but the same applies to the case where the composite sheet constituting the top sheet 12 is the composite sheet 10J.

The plurality of elastic members 19 are for shrinking the diaper in the width direction to improve the fit in the back side portion B, but are arranged to overlap the elastic member arrangement region BM in which the plurality of elastic members 19 are arranged. When the continuous convex portions 40 and 40A of the composite sheets 10 and 10J constituting the surface sheet 12 and the elastic member 19 satisfy the above relationship, the elastic member 19 absorbs the back side portion B of the diaper 100, particularly the absorption. The shape of the continuous protrusions 40 and 40A is easily maintained even when the portion extending from the body 14 toward the back end portion contracts in the second direction Y along the article width direction Ya. Thereby, the anti-steaming effect in the back side part B increases, and the liquid leak prevention effect from the back side part B side also increases.
Further, since the above-described continuous convex portions 40 and 40A have a portion whose width is regularly narrowed in the second direction Y, the contraction of the continuous convex portions 40 and 40A becomes regular, and the back side portion B The effect of preventing stuffiness is increased. Moreover, the density density of the fiber density can be formed in the continuous convex portions 40, 40A, and the liquid absorption performance and the leakage prevention effect are improved.

  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 panty liner, or the like.

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1>
An absorbent article comprising a top sheet, a back sheet and an absorbent body disposed between the two sheets,
The top sheet is composed of a composite sheet having a first direction and a second direction perpendicular thereto, and the first direction coincides with the longitudinal direction of the article along the wearer's front-rear direction when worn,
In the composite sheet, the laminated first sheet and second sheet are partially joined by embossing to form a plurality of joints, and the first sheet is separated from the second sheet at a portion other than the joints. Projecting in the direction, forming a plurality of convex portions projecting toward the wearer's skin side,
The composite sheet has a non-embossed region extending in the second direction and continuously extending in the second direction, and extending in the second direction, and the joints are formed in a regular pattern. Embossed areas formed alternately in the first direction,
The two embossed regions sandwiching each of the non-embossed regions are respectively convex portions formed by connecting the midpoints of the end portions of the joints closest to the non-embossed regions in the respective parts in the second direction with straight lines. The shape of the contour-forming line is a polygonal line having a distal point and a proximal point having different distances from the non-embossed region in the second direction, and the convex portion is formed in the non-embossed region in the second direction. A continuous convex portion that extends continuously is formed, the continuous convex portion has a portion whose width is regularly narrowed in the second direction,
The joining part which comprises the said embossing area | region is an absorbent article which does not cross | intersect the other joining part which comprises an embossing area | region about any of the tangent line which extends in a 1st direction, and the tangent line which extends in a 2nd direction.

<2>
The absorbent article according to <1>, wherein the embossed region includes a discontinuous embossed region convex portion surrounded by an annular concave portion.
<3>
The absorbent article according to <1> or <2>, wherein the non-embossed region has a length in a first direction of 20% or more and 100% or less of a length in the same direction of the embossed region.
<4>
The absorbent article according to <3>, wherein the non-embossed region has a length in a first direction of 30% or more and 90% or less of a length in the same direction of the embossed region.
<5>
The absorbent article according to any one of <1> to <4>, wherein the shape of the joint portion constituting the embossed region is square or rectangular in plan view.

<6>
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. Any one of the above-mentioned <1> to <4>, 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. Or an absorbent article according to claim 1.
<7>
<6>, wherein a plurality of joint portions having a configuration in which one first joint portion is surrounded by four second joint portions are formed in series in the second direction in the embossed region. Absorbent articles.
<8>
In the first joint row, the joint portion ratio, which is the ratio of the total length of the first joint portions in the second direction Y to the length of the first joint row in the second direction Y, is 10% or more and 80% or less. The absorbent article according to <6> or <7>.
<9>
The absorbent article according to any one of <1> to <6>, wherein at least one of a groove part along an article longitudinal direction and a groove part along an article width direction is formed on the absorbent body.
<10>
The said continuous convex part is an absorbent article of any one of said <1>-<9> which has the continuous hollow part extended continuously along a 2nd direction in the back side.

<11>
The composite article according to any one of <1> to <10>, wherein the surface on the second sheet 2 side is substantially flat.
<12>
The continuous convex part is formed by connecting the first convex part and the second convex part to each other, and the first convex part and the second convex part are both elliptical in shape in plan view, The first convex part has the long axis of the ellipse coincident with the first direction, and the second convex part has the long axis of the ellipse coincident with the second direction, any one of the above <1> to <11> The absorbent article as described.
<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>
The first joint portion and the second joint portion have different arrangement positions in the second direction, and the first joint portion and the second joint portion have different lengths along the second direction, <1>. The absorbent article according to any one of ~ <13>.
<15>
The 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. The absorbent article according to any one of the above items <1> to <14>, in which a first joining portion row is formed.

<16>
The rectangular second joints are arranged in a row at short intervals along the second direction Y, with the short sides thereof aligned with the second direction Y, and thereby in the second direction Y. The absorbent article according to any one of the above items <1> to <15>, wherein a second joining row is formed.
<17>
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 31 in the second direction Y is The absorbent article according to any one of the above items <1> to <16>, having two kinds of intervals, and alternately having wide intervals and narrow intervals.
<18>
In each first joint row R1, the arrangement positions of the first joints when viewed along the second direction Y are all the same, and the second direction Y also applies to each second joint row R2. The absorbent article according to any one of <1> to <16>, wherein the arrangement positions of the second joints when viewed along the line are all the same.
<19>
The continuous convex part is formed by connecting the first convex part and the second convex part to each other,
A first convex portion of the continuous convex portion is formed between the distal points P1 of the pair of convex portion contour forming lines opposed across the non-embossed region, and a pair of convex contour contours opposed across the non-embossed region A second convex portion of the continuous convex portion is formed between the proximal points P2 of the line, and the second convex portion 42 is longer than the length of the first convex portion with respect to the length in the direction along the first direction X. The absorbent article according to any one of the above items <1> to <18>, wherein the length of is shorter.
<20>
The composite sheet has a discontinuous embossed region in-convex portion surrounded by an annular recess in the embossed region, and the embossed region in-convex portion is either in the first direction X or the second direction Y. The absorbent article according to any one of <1> to <19>, which has a shape having a top portion even in a cross section in the direction.

<21>
The continuous convex part is formed by connecting the first convex part and the second convex part to each other,
The plurality of convex portions in the embossed region are arranged in a line in a straight line at a certain distance along the second direction Y to form a convex column in the embossed region, and the second convex The plurality of portions are also arranged in a straight line at a certain distance along the second direction Y to form a second convex portion row, and the convex portion in the embossed region and the second portion The convex part is the absorbent article according to any one of <1> to <20>, which is formed at the same position in the second direction Y.
<22>
The continuous convex part is formed by connecting the first convex part and the second convex part to each other,
A third convex portion exists between the convex portion in the embossed region and the second convex portion, and the second convex portion, the third convex portion, the convex portion in the embossed region, and the third convex portion are in this order. The absorbent article according to any one of <1> to <21>, which is regularly and linearly arranged along the direction X.
<23>
In the composite sheet, a first convex portion, a second convex portion, a third convex portion and a convex portion in the embossed region are formed on the first sheet constituting the first convex portion, The absorbent article according to any one of <1> to <22>, wherein the height is lower than any of the second convex portion and the convex portion 46 in the embossed region.
<24>
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>-<23> which satisfy | fills the relationship of (2) or (1)-(3).
(1) H1 ≧ H2
(2) H1> H4, H2 ≧ H4
(3) H4 ≧ H3
<25>
The length Ln along the first direction of the non-embossed region is 1 mm or more, particularly 2 mm or more, preferably 10 mm or less, and particularly preferably 5 mm or less. Any one of the above items <1> to <24> The absorbent article as described.

<26>
The length Le along the first direction Y of the embossed region is 1 mm or more, particularly 2 mm or more, preferably 15 mm or less, particularly preferably 10 mm or less. Any one of the above items <1> to <25> The absorbent article as described.
<27>
The length L5 along the second direction Y of the gap between the joint portions in the embossed region is preferably 20% or more and 100% or less of the length Ln along the first direction X of the embossed region E, more preferably. Is 30% or more and 90% or less, The absorbent article according to any one of <1> to <26>.
<28>
A distance LP1 between the distal points P1 along the first direction X (same as the length along the first direction X of the first convex portion 41) is a distance LP2 between the proximal points P2 along the first direction X. Preferably, it is 120% or more, more preferably 150% or more, and preferably 300% or less, more preferably 280% or less. The absorbent article according to any one of <1> to <27>.
<29>
The pitch of the distal point P1 or the proximal point P2 in the second direction Y (same as the distance between the centers of the constricted portions of the continuous convex portion 40) is preferably 0.4 mm or more, more preferably 2 mm or more, and also preferably Is 40 mm or less, More preferably, it is 20 mm or less, The absorbent article in any one of said <1>-<28>.
<30>
The length L3 along the first direction X of the first joint portion is preferably 0.1 mm or more, particularly 0.3 mm or more, preferably 10 mm or less, particularly preferably 5 mm or less. The length L1 along the two directions Y is 0.1 mm or more, particularly 0.5 mm or more, preferably 10 mm or less, particularly preferably 5 mm or less, any one of the above items <1> to <29> The absorbent article as described.

<31>
The length along the first direction X of the second joint is preferably 0.1 mm or more, particularly 0.5 mm or more, preferably 10 mm or less, particularly preferably 5 mm or less, and the first direction of the second joint The length along X is preferably 0.1 mm or more and 10 mm or less, and the length L2 along the second direction Y of the second joint is preferably 0.1 mm or more, particularly preferably 0.5 mm or more. Hereinafter, the absorbent article according to any one of <1> to <30>, particularly preferably 5 mm or less.
<32>
The second joint row R2 is a joint having a portion in which the distance between the joints 32 in the second direction Y is large (the same as the length L1 of the first joint in FIG. 6). It is preferably 1 time or more, particularly 1.5 times or more, preferably 10 times or less, particularly preferably 8 times or less, with respect to the interval between 32 (same as the length L5 of the gap), < The absorbent article according to any one of 1> to <31>.

<33>
Disposable diaper having an abdominal side portion disposed on the stomach side of the wearer when worn, a back side portion disposed on the back side of the wearer when worn, and a crotch portion positioned between the abdominal side portion and the back side portion And
A plurality of elastic members for shrinking the disposable diaper in the width direction are disposed at least in the center in the width direction of the dorsal side portion at intervals in the longitudinal direction of the disposable diaper,
In the elastic member arrangement region where the plurality of elastic members are arranged, a plurality of the continuous protrusions are formed extending in the second direction, respectively.
When the width of the continuous convex portion is P1, the interval between the elastic members is P2, and the interval between the central portions of the continuous convex portions is P3, the relationship <1> to P1 <P2 <P3 is satisfied. <32> The absorbent article according to any one of the above.

DESCRIPTION OF SYMBOLS 1 1st sheet 2 2nd sheet 12 Top sheet 13 Back sheet 14 Absorber 10, 10J Composite sheet E Embossed area N Non-embossed area 30 Joint part group 31, 31A 1st joint part R1 2nd joint part row | line | column 32, 32A 1st 2 joint part R2 2nd joint part row | line | column 40,40A Continuous convex part 40V Continuous hollow part 41 1st convex part 42 2nd convex part 43 3rd convex part 46 Embossed area inside convex part 46V Hollow part 47 Annular recessed part Lt Convex part outline Formation line 111 First roll 112 Second roll 113 First heat roll 114 Second heat roll 141A First roll first recess area 142A First roll second recess area 143A First roll third recess area 146A First roll center recess Region 141B Second roll first convex portion 142B Second roll second convex portion 146B Second roll central concave portion 121 First gear 122 Second gear 1 23 Spacer 124 Third gear 128 Fourth gear

Claims (9)

An absorbent article comprising a top sheet, a back sheet and an absorbent body disposed between the two sheets,
The top sheet is composed of a composite sheet having a first direction and a second direction perpendicular thereto, and the first direction coincides with the longitudinal direction of the article along the wearer's front-rear direction when worn,
In the composite sheet, the laminated first sheet and second sheet are partially joined by embossing to form a plurality of joints, and the first sheet is separated from the second sheet at a portion other than the joints. Projecting in the direction, forming a plurality of convex portions projecting toward the wearer's skin side,
The composite sheet has a non-embossed region extending in the second direction and continuously extending in the second direction, and extending in the second direction, and the joints are formed in a regular pattern. Embossed areas formed alternately in the first direction,
The two embossed regions sandwiching each of the non-embossed regions are respectively convex portions formed by connecting the midpoints of the end portions of the joints closest to the non-embossed regions in the respective parts in the second direction with straight lines. The shape of the contour-forming line is a polygonal line having a distal point and a proximal point having different distances from the non-embossed region in the second direction, and the convex portion is formed in the non-embossed region in the second direction. A continuous convex portion that extends continuously is formed, the continuous convex portion has a portion whose width is regularly narrowed in the second direction,
None of the joints constituting the embossed region intersects with other joints constituting the embossed region for any of the tangent lines extending in the first direction and the tangent lines extending in the second direction ,
The continuous convex part is formed by connecting the first convex part and the second convex part to each other, and the first convex part and the second convex part are both elliptical in shape in plan view, The first convex part is an absorbent article in which the major axis of the ellipse coincides with the first direction, and the second convex part is the major axis of the ellipse coincides with the second direction .   The absorptive article according to claim 1 which has a discontinuous embossing field in-projection part surrounded by an annular crevice in the embossing field.   The absorbent article according to claim 1 or 2, wherein the non-embossed region has a length in a first direction of 20% or more and 100% or less of a length in the same direction of the embossed region.   The shape of the said junction part which comprises the said embossing area | region is an absorbent article of any one of Claims 1-3 which is square shape or rectangular shape in planar view.   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. The second joint row arranged in a row is formed, and the second joint row is formed on both sides of the first joint row in the first direction. Absorbent article as described in 1.   The said embossed area | region WHEREIN: The joining part group which has the structure by which one 1st junction part was enclosed by the 4th 2nd junction part is formed in multiple numbers in the state serially connected to the 2nd direction. Absorbent article.   In the first joint row, the joint portion ratio, which is the ratio of the total length of the first joint portions in the second direction Y to the length of the first joint row in the second direction Y, is 10% or more and 80% or less. The absorptive article according to claim 5 or 6 which exists.   The absorbent article according to any one of claims 1 to 7, wherein at least one of a groove part along an article longitudinal direction and a groove part along an article width direction is formed on the absorbent body. Disposable diaper having an abdominal side portion disposed on the stomach side of the wearer when worn, a back side portion disposed on the back side of the wearer when worn, and a crotch portion positioned between the abdominal side portion and the back side portion And
A plurality of elastic members for shrinking the disposable diaper in the width direction are disposed at least in the center in the width direction of the dorsal side portion at intervals in the longitudinal direction of the disposable diaper,
In the elastic member arrangement region where the plurality of elastic members are arranged, a plurality of the continuous protrusions are formed extending in the second direction, respectively.
The relationship of P1 <P2 <P3 is satisfied, where P1 is a width of the continuous convex portion, P2 is an interval between the elastic members, and P3 is an interval between central portions of the continuous convex portions. The absorbent article according to any one of the above.