JP6195303B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a disposable diaper.

  As an absorbent article, comprising an absorbent body and a surface sheet disposed on the skin facing surface side of the absorbent body, an abdominal side part disposed on the abdomen side of the wearer and a back side part disposed on the back side; It is known to have a crotch portion positioned between them and a vertical direction extending from the abdominal side portion to the back side portion via the crotch portion and a lateral direction perpendicular thereto. Moreover, as one of the liquid leakage prevention means, by embossing the absorbent body or both the top sheet and the absorbent body from the skin facing surface side, the absorbed body fluid is diffused along the embossed portion. The technology to make it known is known.

  For example, in Patent Document 1, in the crotch part, embossing is performed on the entire skin-facing surface of the absorbent body, and non-embossed parts are dotted on the abdominal side portion and the back side portion. It is described that embossing is performed on a part of the skin-facing surface, and high-absorbent resin is concentrated in the non-embossed portions that are scattered. However, the main technical content described in Patent Literature 1 is that the embossed portions (spotted portions) are overlapped with the folds for packaging in order to easily perform folding processing for packaging. Does not describe any device for controlling the liquid diffusion in the absorber. On the other hand, Patent Document 2 describes that for the purpose of controlling the diffusion of body fluid, embossing is performed from the skin-facing surface side of the absorbent body in each of the abdominal part and the dorsal part to form linear embossing. ing. However, Patent Document 2 does not describe embossing from the non-skin facing surface side of the absorber.

  Further, in Patent Document 3, since a large amount of body fluid absorption / diffusion is required for the portion located at the crotch portion of the absorbent body, relatively dense embossing is performed, and the other portion (ventral side portion) And the back side) describes that embossing is performed loosely by increasing the embossing pitch in the longitudinal direction of the absorber. In the absorbent article described in Patent Document 3, all the embossing applied to the absorber is performed from the skin-facing surface side of the absorber, and Patent Document 3 includes a non-skin facing surface of the absorber. Embossing from the side is not described.

JP 2008-237384 A Japanese Patent No. 4204450 JP 2004-16373 A

  The ideal liquid absorption / diffusion in absorbent articles is such that there is no liquid remaining on the top sheet, especially in the crotch, and the upper layer part of the absorbent body (relatively closer to the wearer's skin) has a liquid diffusion area. It is small and the liquid spreads in the vertical direction in the lower layer part of the absorber (relatively far from the wearer's skin). If such liquid absorption and liquid diffusion are realized, surface liquid residue can be effectively prevented, and discomfort caused by wetness of the wearer's skin with body fluid can be reduced. With the techniques described in Patent Documents 1 to 3, such ideal liquid absorption and liquid diffusion cannot be realized.

  Therefore, the present invention relates to an absorbent article having a small amount of surface liquid residue and reduced discomfort due to skin getting wet with body fluids during wearing.

  The present invention comprises an absorbent body, a top sheet disposed on the skin-facing surface side of the absorbent body, and a back sheet disposed on the non-skin-facing surface side of the absorbent body. A longitudinal side extending from the abdominal side to the back side part through the crotch part, and having a back side part disposed on the back side and a crotch part positioned therebetween, An absorbent article having a transverse direction perpendicular thereto, wherein in the crotch part, the non-skin facing surface of the absorbent body is formed with a number of recesses by embossing applied from the non-skin facing surface side. However, the skin facing surface is not embossed from the skin facing surface side of the absorbent body located on the side opposite to the non-skin facing surface, and the skin facing surface is flat. In the ventral part and the dorsal part, the skin-facing surface of the absorbent body is embossed from the skin-facing surface side. Although it has a recess forming region where a large number of recesses are formed by work, the embossing is not applied from the non-skin facing surface side of the absorbent body located on the side opposite to the skin facing surface. The skin facing surface provides an absorbent article having a flat surface.

  Further, the present invention is a method for producing the absorbent article, wherein an absorbent body precursor in which the concave portion is not formed with a lateral direction as a supply direction is supplied between a pair of embossing rolls facing each other. The embossing roll has an embossing step of forming the recesses on the skin-facing surface and the non-skin-facing surface of the absorber precursor, and the pair of embossing rolls are respectively a roll axial direction center portion and a roll axial direction center portion. A pair of the embossed portions having an embossed portion formed on the roll peripheral surface, the embossed convex portion corresponding to the concave portion being formed on the both sides thereof. One embossed portion of the roll has a flat central portion in the roll axial direction, and the embossed convex portions are formed at one end and the other end in the roll axial direction, and a pair of the embossed rolls The other embossed part is flat at one end and the other end in the roll axial direction, and has the embossed convex part formed at the central part in the roll axial direction. The present invention provides a method for manufacturing an absorbent article in which the absorbent body precursor passing between both rolls can be simultaneously pressed by the processed section and the other embossed section.

  Further, the present invention is a method for producing the absorbent article, wherein an absorbent body precursor in which the concave portion is not formed with a longitudinal direction as a supply direction is supplied between a pair of opposing embossing rolls, An embossing step of forming the recesses on the skin facing surface and the non-skin facing surface of the absorber precursor by an embossing roll, and each of the pair of embossing rolls is an embossing convex portion corresponding to the recessing portion on the roll peripheral surface. An embossed part formed with a flat part where the embossed convex part is not formed in the roll circumferential direction, and one embossed part of the pair of embossing rolls and the other flat part, The present invention provides a method for producing an absorbent article that is capable of simultaneously pressurizing the absorber precursor passing between both rolls.

  ADVANTAGE OF THE INVENTION According to this invention, the surface liquid residue remains little and the absorbent article by which the discomfort by skin getting wet with a bodily fluid during wear was reduced is provided.

FIG. 1 is a top sheet side (skin facing surface side) schematically showing a developed state in which a disposable diaper as an embodiment of the absorbent article of the present invention is expanded in a flat shape by stretching elastic members of each part. FIG. FIG. 2 is a schematic cross-sectional view taken along the line II of FIG. Fig.3 (a) is a longitudinal cross-sectional view which shows typically the cross section along the vertical direction of the absorber in the diaper shown in FIG. 1, FIG.3 (b) is a schematic plan view of the skin opposing surface of this absorber. It is. 4 (a) and 4 (b) are longitudinal sectional views along the longitudinal direction of the surface sheet and the absorbent body in the diaper shown in FIG. 1, respectively, and schematically show the state of liquid absorption and liquid diffusion in these members. FIG. FIG. 5 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of another embodiment of the absorbent body according to the present invention. FIG. 6 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 7 is a longitudinal sectional view (corresponding to FIG. 3 (a)) schematically showing a section along the longitudinal direction of still another embodiment of the absorbent body according to the present invention. FIG. 8 is a longitudinal sectional view (corresponding to FIG. 3A) schematically showing a section along the longitudinal direction of still another embodiment of the absorbent body according to the present invention. FIG. 9 is a longitudinal sectional view (corresponding to FIG. 3A) schematically showing a section along the longitudinal direction of still another embodiment of the absorbent body according to the present invention. FIG. 10 is a longitudinal sectional view (corresponding to FIG. 3A) schematically showing a section along the longitudinal direction of still another embodiment of the absorbent body according to the present invention. FIG. 11 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 12 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 13 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 14 is a schematic plan view (corresponding to FIG. 3 (b)) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 15 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of still another embodiment of the absorbent body according to the present invention. FIG. 16 (a) is a schematic view of the main part (embossing step of the absorbent body) of one embodiment of the method for producing an absorbent article of the present invention, and FIG. 16 (b) is an embossing roll shown in FIG. 16 (a). 16 (c) is a schematic plan view of the skin-facing surface of the absorbent body manufactured by this method (corresponding to FIG. 3 (b)), and FIG. 16 (d) is a diagram. It is a typical sectional view of a II-II line section of 16 (c). Fig. 17 (a) is a schematic view of the main part (embossing step of the absorbent body) of another embodiment of the method for producing an absorbent article of the present invention, and Fig. 17 (b) is an embossing shown in Fig. 17 (a). A schematic side view of the roll, FIG. 17 (c) is a schematic plan view (corresponding to FIG. 3 (b)) of the skin-facing surface of the absorbent body manufactured by this method, and FIG. It is typical sectional drawing of the II-II line cross section of FIG.17 (c). FIG. 18 is a schematic plan view (corresponding to FIG. 3B) of the skin facing surface of the absorbent body used in Example 1 of the present invention. FIG. 19A is a schematic perspective view of a cup used for measuring the liquid diffusion area and the surface liquid remaining amount, FIG. 19B is a schematic top view of the cup, and FIG. It is a typical side view of the dropping funnel used for this measurement.

  Hereinafter, the absorbent article of the present invention will be described based on a disposable diaper which is a preferred embodiment thereof with reference to the drawings. The diaper 1 of this embodiment is provided with the absorber 4 and the surface sheet 2 distribute | arranged to the skin opposing surface side of this absorber 4 as shown in FIG.1 and FIG.2. In this specification, the skin facing surface is a surface (side relatively close to the wearer's skin) directed to the skin side of the wearer in the wearing state in the diaper 1 and its constituent members (for example, the absorbent body 4). The non-skin facing surface is a surface (a side relatively distant from the wearer's skin) that faces the opposite side of the wearer's skin side in the wearing state in the diaper 1 and its constituent members.

  More specifically, the diaper 1 is a so-called unfolded disposable diaper, as shown in FIGS. 1 and 2, a liquid-permeable surface sheet 2 that forms a skin-facing surface and a liquid impermeable material that forms a non-skin-facing surface. A rear sheet 3 that is permeable, liquid-impermeable, or water-repellent, and a liquid-retaining absorbent 4 that is disposed between the two sheets 2 and 3 are provided. Each of the top sheet 2 and the back sheet 3 has a size larger than that of the absorber 4, and extends outward from the peripheral edge of the absorber 4. The absorbent body 4 (which is formed by covering the absorbent core 40 with the core wrap sheet 41) has a substantially rectangular shape that is long in the same direction as the longitudinal direction X of the diaper 1, and the longitudinal direction thereof is in an unfolded and extended state. The diaper 1 is joined to the central portion between the sheets 2 and 3 by an adhesive so as to coincide with the longitudinal direction X of the diaper 1. As the top sheet 2 and the back sheet 3, those conventionally known in the technical field can be used without particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet 2, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 3. In addition, when the resin film etc. are distribute | arranged to the non-skin opposing surface side of the absorber 4, and the exterior sheet | seats, such as a nonwoven fabric, are further distribute | arranged to the non-skin opposing surface side, the exterior sheet | seat is also included in the back surface sheet 3.

  As shown in FIG. 1, the diaper 1 is located on the stomach side of the wearer in the worn state, the back side part C disposed on the back side, and between the wearer's crotch It has a crotch part B arranged in the part, and has a vertical direction X and a horizontal direction Y orthogonal thereto. The longitudinal direction X of the diaper 1 is a direction extending through the crotch B between the abdominal side A and the back side C. The diaper 1 has an hourglass shape in which both side edges along the longitudinal direction X of the crotch part B are curved inwardly in an arc shape, and in the plan view shown in FIG. have.

  Regarding the positions of the abdominal side A, the crotch B and the back side C, in the present invention, the abdominal side A, the crotch B and the back side C have the diaper 1 (absorbent article) in the longitudinal direction X for convenience. It shall correspond to each area when divided into three equal parts. When the diaper is actually worn, the crotch part may be located closer to the ventral side or the back side than the region on one end side in the vertical direction when the diaper is divided into three equal parts in the vertical direction. For this reason, in the case where a recess formation region to be described later is formed in the crotch, “the recess formation region is a boundary line between the ventral side A and the crotch B when the diaper 1 is divided into three equal parts in the vertical direction X ( A virtual straight line extending in the lateral direction Y through the boundary) to the position of 25% of the total length of the diaper 1 in the longitudinal direction X toward the ventral side A ”, and the present invention Including. Similarly, the present invention describes that the "recessed region is the vertical direction of the diaper 1 from the boundary line between the back side C and the crotch B when the diaper 1 is equally divided into the vertical direction X toward the back side C. "When extending to a position of 10% of the total length of X" and "the recess formation region is the total length of the diaper 1 in the longitudinal direction X from the boundary line between the back side C and the crotch B toward the crotch B. "When there is no position up to 10%".

  The absorbent body 4 includes a liquid-retaining absorbent core 40 and a water-permeable core wrap sheet 41 that covers the skin facing surface and the non-skin facing surface of the absorbent core 40. The absorbent core 40 has both side edges along the longitudinal direction X of the crotch part B curved inwardly in an arc shape and has a constricted portion, and the central portion in the longitudinal direction X is constricted inward in plan view. It has an hourglass shape (see FIG. 3B). The absorbent core 40 is preferably arranged such that the constricted portion (the narrowest portion having the shortest lateral length) is located in the crotch part B of the diaper 1, and in particular, the absorbent core 40 is constricted. Whether the part matches the constricted part of the diaper 1 (the narrow part having the shortest lateral length in the unfolded and extended state as shown in FIG. 1; the central part of the crotch B in the longitudinal direction X) in the longitudinal direction X. Or it is preferable to arrange | position so that it may be located within +/- 20mm in the vertical direction X from the constriction part of the diaper 1 from a viewpoint of the mounting | wearing property improvement of the diaper 1. FIG.

  The core wrap sheet 41 is a single continuous sheet having a width that is two to three times the length of the absorbent core 40 in the lateral direction Y. The core wrap sheet 41 covers the entire area of the skin facing surface of the absorbent core 40 (the surface facing the top sheet 2), and from the side edges along the longitudinal direction X of the absorbent core 40 outward in the lateral direction Y. The extended portion and the extended portion are rolled down below the absorbent core 40 to cover the entire area of the non-skin facing surface of the absorbent core 40. The absorbent core 40 and the core wrap sheet 41 may be joined by a known joining means such as a hot-melt adhesive. Examples of the absorbent core 40 include a fiber aggregate made of hydrophilic fibers such as synthetic fiber treated with wood pulp and a hydrophilizing agent, or a fiber aggregate in which a particulate water-absorbing polymer is held. Can be used. As the core wrap sheet 41, paper, a hydrophilic nonwoven fabric made of fibers subjected to a hydrophilic treatment, or the like can be used.

  Between the top sheet 2 and the back sheet 3 in the waist portions (ends in the longitudinal direction X) of the ventral side portion A and the back side portion C, a thread-like elastic member 31 is stretched along the lateral direction Y. The waist gathers are formed by the contraction of the elastic member 31 at the waist when the diaper 1 is worn. Further, between the top sheet 2 and the back sheet 3 in the left and right leg portions arranged around the legs of the wearer, a thread-like elastic member 32 is fixed in an extended state along the longitudinal direction X. Thus, a pair of leg gathers is formed in the leg portion when the diaper 1 is worn by contraction of the elastic member 32. Moreover, the side seat | sheet 34 is distribute | arranged to the left-right both sides along the vertical direction X in the surface sheet 2 side of the diaper 1, respectively. A thread-like elastic member 33 is fixed to the inner edge of the side seat 34 in a stretched state along the longitudinal direction X. Accordingly, when the diaper 1 is worn, the elastic member 33 contracts at least in the crotch B. A gather is formed. The top sheet 2, the back sheet 3, the absorber 4, the elastic members 31, 32, 33 and the side sheet 34 are joined to each other by a known joining means such as a hot-melt adhesive.

  As shown in FIG. 1, a pair of fastening tapes 35, 35 are provided on both side edges along the longitudinal direction X of the back side C of the diaper 1. A fastening portion (not shown) made of a male member of a mechanical surface fastener is attached to the fastening tape 35. In addition, a non-skin facing surface (non-skin facing surface of the back sheet 3) of the ventral side portion A of the diaper 1 is formed with a to-be-attached region 36 made of a female member of a mechanical surface fastener. The to-be-attached region 36 is formed by joining and fixing a female member of a mechanical hook-and-loop fastener to the non-skin facing surface of the back sheet 3 by a known joining means (for example, an adhesive or heat seal). The fastening portion of the tape 35 can be detachably fastened.

  As one of the main characteristics of the diaper 1 of this embodiment, the skin opposing surface 4a (opposite surface with the surface sheet 2) and the non-skin opposing surface 4b (back surface) of the absorber 4 (absorbent core 40 and core wrap sheet 41). The point which has the recessed part formation area | region where many recessed parts 45 by embossing was formed in the surface facing the sheet | seat 3 is mentioned. This recessed portion forming region is a region in which a large number of recessed portions 45 are provided in a certain pattern (plan view shape and arrangement). As will be described later, it is preferable that a fixed number of recesses per unit area is formed in the “many recesses” constituting the recess forming region, that is, the recess occupancy is in a specific range described later. The concave portion 45 is the ideal liquid absorption / liquid diffusion in the absorbent article described above. “Especially in the crotch, no liquid remains on the top sheet, and the upper layer portion of the absorbent body (the side closer to the wearer's skin). ), The liquid diffusion area is small, and in the lower layer part of the absorber (relatively far from the wearer's skin), the liquid spreads in the vertical direction, and body fluid such as urine remains on the top sheet 2 (so-called It is formed to effectively prevent surface liquid residue). The recess 45 is formed by embossing the absorbent core 40 and the core wrap sheet 41 covering the absorbent core 40, and the core wrap sheet 41 and the absorbent core 40 are integrally recessed by embossing. Become. The recess 45 is formed only in the absorbent body 4 and is not formed in the top sheet 2 and the back sheet 3 disposed on both sides of the absorbent body 4. From the viewpoint of touch and the back sheet 3, it is preferable from the viewpoint of maintaining strength when force is applied to the back sheet 3.

  As shown in FIG. 3, in the crotch part B, a non-skin facing surface 4b of the absorbent body 4 is formed with a recess forming region in which a large number of recesses 45 are formed by embossing applied from the non-skin facing surface 4b side. However, embossing is not performed from the skin facing surface 4a side of the absorbent body 4 located on the opposite side to the non-skin facing surface 4b, and the skin facing surface 4a is flat. Further, in the ventral side A and the back side C, the skin-facing surface 4a of the absorbent body 4 has a recess-forming region in which a large number of recesses 45 are formed by embossing applied from the skin-facing surface 4a side. Although formed, embossing is not performed from the non-skin facing surface 4b side of the absorbent body 4 located on the side opposite to the skin facing surface 4a, and the non-skin facing surface 4b is flat. That is, in the crotch part B, the absorbent body 4 has, in order from the skin facing surface side (surface sheet 2 side), a concave portion non-forming layer 4P in which the concave portion 45 is not formed and a concave portion forming layer in which the concave portion 45 is formed. 4Q, and the abdominal side A and the back side C have a recess forming layer 4Q and a recess non-forming layer 4P in order from the skin facing surface side (surface sheet 2 side). In FIG. 3, from the viewpoint of easy explanation, a portion of the core wrap sheet 41 that does not cover the skin facing surface and the non-skin facing surface of the absorbent core 40 [the constricted portion of the absorbent core 40 ( The illustration of the portion corresponding to the (notch) is omitted.

  In this specification, the term “flat” used for the skin facing surface 4a and the non-skin facing surface 4b of the absorbent body 4 is not only completely flat with no irregularities, but also has minute irregularities but is substantially flat. Including some cases. As an example of a “substantially flat surface”, there is a case where minute unevenness is formed on the surface due to embossing from the surface side opposite to the surface. . The embossing for forming the recess 45 is performed by pressing the absorber 4 that is an embossing object between two pressing members facing each other. At that time, the absorber 4 in one pressing member. An embossed region where a large number of embossed convex portions corresponding to the concave portion 45 are formed is located in a portion facing the formation surface of the concave portion 45, and a portion facing the embossed region in the other pressure member is an uneven portion. There is no flat surface. The portion pressed by the flat surface of the pressure member in the absorber 4 is not embossed and is essentially flat corresponding to the flat surface of the pressure member. Under the influence of pressing by the embossed convex part from the opposite side, there are cases where minute irregularities are formed. In the present invention, even in such a case, the surface on which the minute unevenness is formed is “flat”. In the case where unevenness exists on the surface opposite to the embossed surface (embossed surface) of the absorber 4, the depth of the concave portion constituting the unevenness is the embossed surface. When the depth of the formed recess (recess 45) is 40% or less, the unevenness is “minute unevenness”, and the surface on which the unevenness is formed is “flat”.

  In this embodiment, as shown in FIG. 3 (b), each recess 45 has a circular shape in plan view, and the non-skin facing surface 4 b of the absorbent body 4 in the crotch part B, as well as the abdominal part A and the dorsal part. A large number of discrete patterns are formed on the entire skin facing surface 4a of the absorbent body 4 in C. The depth D1 (see FIG. 3A) and the diameter R1 (see FIG. 3B) of each recess 45 are the same, and the interval P1 between the adjacent recesses 45, 45 (see FIG. 3B). ) Is made uniform. As the embossing for forming the recess 45, a known embossing used for compressing the constituent member in this type of absorbent article can be used, for example, heat embossing, ultrasonic embossing, etc. Is mentioned. In the recess 45, the core wrap sheet 41 and the absorbent core 40 are integrated. The core wrap sheet 41 and the absorbent core 40 integrated in the recess 45 are preferably not fused to each other. Specifically, the core wrap sheet 41 and the absorbent core 40 are preferably integrated so that the core wrap sheet 41 can be peeled off by hand without being broken from the absorbent core 40 in the recess 45.

  FIG. 4 shows the state of liquid absorption and liquid diffusion (behavior of body fluid excreted from the wearer) in the diaper 1. The part which attached | subjected the dot in FIG. 4 shows the bodily fluid excreted from the wearer. When body fluid such as urine is excreted from the excretion part of the wearer while the diaper 1 is worn, the body fluid mainly contacts the top sheet 2 of the crotch part B of the diaper 1 first. In the crotch part B, the absorbent body 4 has, in order from the surface sheet 2 side, a laminated structure of a recess non-forming layer 4P and a recess forming layer 4Q, and the skin facing surface 4a (surface sheet) of the recess non-forming layer 4P. The surface sheet 2 and the concave portion non-formed layer 4P are in close contact with each other because the surface 2 is flat without being embossed. Moreover, since the recessed part 45 does not have the recessed part 45 formed and the absorbent material material which comprises the absorptive core 40 is closely filled, the body fluid which exists in the surface sheet 2 adjacent to this is not formed. The pulling power is relatively strong. Therefore, the bodily fluid excreted from the wearer's excretory part onto the top sheet 2 of the crotch B is quickly drawn into the non-recessed layer 4P by the non-recessed layer 4P that is in close contact with the top sheet 2. While diffusing in the non-formed layer 4P in the surface direction, it quickly permeates and transfers toward the back sheet 3 side (see FIG. 4A).

  On the other hand, the ventral side portion A and the back side portion C have a laminated structure of the concave portion forming layer 4Q and the concave portion non-forming layer 4P in order from the surface sheet 2 side, and each concave portion 45 of the concave portion forming layer 4Q. Since the inner space becomes an obstacle to the diffusion of body fluid, the body fluid hardly diffuses and moves in the surface direction in the recess forming layer 4Q (see FIG. 4A). Therefore, in the ventral part A and the dorsal part C, the diffusion transfer of body fluids on the skin facing surface of the diaper 1 and in the vicinity thereof (portion of the top sheet 2 and the absorbent body 4 near the top sheet 2) is suppressed.

  The bodily fluid (see FIG. 4 (a)) that has permeated and transferred in the crotch part B through the recessed part non-forming layer 4P of the absorbent body 4 toward the back sheet 3 side is connected to the recessed part non-formed layer 4P of the crotch part B. The portion A and the back side portion C are diffused and transferred to the non-recessed layer 4P (see FIG. 4B).

  Thus, the absorbent body 4 can quickly draw in the body fluid excreted in the top sheet 2 of the crotch B, and the diffusion of the body fluid on the skin facing surface side (the top sheet 2 side) of the absorbent body 4 is Since it stays in the crotch B, the liquid diffusion area is small. On the non-skin facing surface side (the back sheet 3 side), body fluid diffuses from the crotch B in the vertical direction X and reaches the abdominal side A and the back side C. Therefore, the liquid diffusion area is large. Therefore, the diaper 1 provided with the absorbent body 4 having such liquid absorption / liquid diffusion characteristics has little surface liquid remaining, and discomfort due to skin getting wet with body fluid during wearing is reduced.

From the standpoint of ensuring the above-described effects (liquid absorption / liquid diffusion characteristics), it is preferable to set the dimensions and the like of each part of the absorbent body 4 as follows.
The depth D1 of the recess 45 (see FIG. 3A) is preferably 10% or more, more preferably 15% or more, and preferably 70% or less, more preferably, with respect to the thickness D2 of the absorber 4. 50% or less, more specifically, preferably 18% or more and 40% or less, more preferably 20% or more and 30% or less. The depth D1 of the recess 45 is equal to the thickness of the recess forming layer 4Q.
The diameter R1 (see FIG. 3B) of the concave portion 45 having a circular shape in plan view is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 10 mm or less, more preferably 5 mm or less, more specifically. Is preferably 1.5 mm or more and 3 mm or less.
The interval P1 (see FIG. 3B) between the adjacent recesses 45, 45 is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 15 mm or less, more preferably 10 mm or less, more specifically. Preferably, it is 2 mm or more and 5 mm or less.

The proportion of the recess 45 in the unit area (recess occupancy) is preferably 3% or more, more preferably 7% or more, and preferably 30% or less, more preferably 25% or less, more specifically preferably Is 10% or more and 20% or less. The recess occupancy ratio is obtained by calculating the sum of the areas of the recesses 45 existing in an arbitrary 1 cm square area (the area of the space in the recess 45 in a plan view), and the ratio of the sum to the area of the area (unit area 1 cm ² ) Is calculated as

  Hereinafter, other embodiment of the absorber which concerns on this invention is described with reference to FIGS. In other embodiments to be described later, constituent parts different from those of the above-described embodiment will be mainly described, and the same constituent parts are denoted by the same reference numerals and description thereof will be omitted. The description of the above embodiment is applied as appropriate to components that are not particularly described.

  In the absorbent body 4A shown in FIG. 5, the concave portion non-forming region 45N in which the concave portion 45 is not formed on the skin facing surface 4a or the non-skin facing surface 4b (not shown in FIG. 5) at the peripheral portion of the absorbent body 4A. Exists. In FIG. 5, the hatched area is a non-recessed area 45N. The absorbent body 4A has a recessed portion forming region 45E in which a large number of recessed portions 45 are formed in the central portion thereof, and the recessed portion non-formed region 45N surrounds the region 45E at least in the ventral side portion A and the back side portion C. Yes. The recess formation region 45E is a region in which a large number of recesses 45 are provided in a fixed pattern (planar shape and arrangement). In the absorber 4A, a region surrounded by a dotted line in FIG. This is a region defined by a plurality of recesses 45 located on the outermost side among the plurality of recesses 45). The recess formation region 45E in the absorbent body 4A has a substantially rectangular shape in plan view, and the central portion of the absorbent body 4A in the crotch B in the longitudinal direction X (the length (width) in the lateral direction Y of the absorbent body 4A is the smallest). ) Over substantially the entire width of the central portion, and therefore there is substantially no non-recessed region 45N in the central portion. When the recess non-formation region 45N exists in the peripheral portion of the absorbent body 4A, the recess non-formation region 45N has an effect of preventing excessive liquid diffusion and preventing body fluid leakage. From the viewpoint of more surely exhibiting such an effect, the widths L1 and L2 of the recess non-formation region 45N (the separation distance between the peripheral edge of the absorber 4A and the recess formation region 45E. The width L1 is the separation distance in the lateral direction Y. , The width L2 is a separation distance in the longitudinal direction X.) Each is preferably 5% or more, more preferably 10% or more, and preferably with respect to the width (length in the lateral direction Y) L3 of the absorber 4A. It is 25% or less, more preferably 20% or less, and more specifically preferably 12% or more and 18% or less.

  In the absorbent body 4B shown in FIG. 6, the recesses in the non-skin facing surface 4b (not shown in FIG. 6) of the absorbent body 4A in the crotch part B with respect to the length (width) in the lateral direction Y of the recess forming region 45E. The width (the longest width if the width is not constant) W1B of the formation region 45E is that of the skin facing surface 4a of the absorbent body 4A of the ventral side A and the back side C (the width W1A in the ventral side A, The back side portion C is shorter than the width W1C) (W1B <W1A, W1C). The recessed portion forming region 45E in the absorbent body 4B has an hourglass shape in which the central portion in the longitudinal direction X is bound inward. In the absorber 4B, the width W1A and the width WIC are the same. With such a configuration, there is a recess non-formation region 45N at the peripheral edge of the absorber 4B, and the recess non-formation region 45N prevents excessive liquid diffusion, thereby preventing side leakage at the crotch part B. More effectively prevented.

From the viewpoint of more surely exhibiting such an effect, the difference (W1A) between the width W1B of the recess formation region 45E of the crotch part B and the widths W1A and W1C of the recess formation regions 45E of the ventral side portion A and the back side portion C. -W1B, W1C-W1B) is preferably 5% or more, more preferably 10% or more, and preferably 30% with respect to the width (length in the lateral direction Y) W2B of the absorbent body 4B of the crotch B In the following, it is more preferably 25% or less, more specifically preferably 15% or more and 20% or less.
Further, the width W1B of the recess forming region 45E of the crotch B is preferably 40% or more, more preferably 50% or more, with respect to the width W2B of the absorber 4B of the crotch B where the region 45E is located. It is preferably 90% or less, more preferably 80% or less, and more specifically preferably 60% or more and 70% or less. “The ratio of the width W1A of the recess forming region 45E of the ventral side A to the width W2A of the absorbent body 4B of the ventral side A where the region 45E is located” and “the width W1C of the recess forming region 45E of the dorsal side C The ratio of the back side C where the region 45E is located to the width W2C of the absorber 4B can be set to be the same as the ratio of the width W1B to the width W2B.

  In the absorbent body 4C shown in FIG. 7, the depth D1B of the recess 45 in the crotch B is that of the ventral side A and the dorsal side C (depth D1A in the ventral side A and depth in the back side C). Shallower than D1C) (D1B <D1A, D1C). The depth of the recessed part 45 in each part A-C is equal to the thickness of the recessed part formation layer 4Q in the said part. In the absorbent body 4C, the depths D1A of the many recesses 45 in the ventral side A are the same as each other, and the depths D1B of the many recesses 45 in the crotch B are the same. The depths D1C of the many recesses 45 are the same as each other. Further, the depth D1A and the depth DIC are the same. With such a configuration, in the crotch part B, the body fluid existing on the skin facing surface 4a side (surface sheet 2) of the absorbent body 4C can be drawn to a relatively far position (side closer to the back sheet 3). Then, the diffusion of the body fluid in the surface direction (longitudinal direction X) will be done at a position relatively far from the wearer's skin, preventing the remaining surface fluid, and the discomfort caused by the skin getting wet with the body fluid during wearing. Reduction is achieved more reliably.

  From the standpoint of ensuring such an effect, the difference between the depth D1B of the recess 45 in the crotch B and the depths D1A and D1C of the recesses 45 in the ventral side A and the back side C (D1A-D1B , D1C-D1B) is preferably 5% or more, more preferably 10% or more, and preferably 60% or less, more preferably 40% or less, more specifically, with respect to the thickness D2 of the absorber 4C. Preferably, it is 15% or more and 40% or less, and more preferably 20% or more and 30% or less. The depths D1A, D1B, and D1C themselves can be set in the same range as the depth D1 in the embodiment.

  In the absorbent body 4D shown in FIG. 8, the ratio of the recess 45 to the unit area of the recess 45 in the non-skin facing surface 4b of the crotch B (the recess occupying ratio) is the skin facing surface 4a of the ventral side A and the back side C. It is low compared with it. The recess occupancy ratio can be adjusted by appropriately adjusting the interval and size (diameter) of the recesses 45. In the absorbent body 4D, the interval between the recesses 45 of the crotch part B is made larger than that of the recesses 45 of the abdominal part A and the back part C, and the size (diameter) of the recess 45 of the crotch part B is increased. By making it smaller than that of the concave portion 45 of the side portion A and the back side portion C, the concave portion occupation rate of the crotch portion B is made lower than that of the ventral side portion A and the back side portion C. By such a configuration, diffusion transfer of body fluid from the recess-unformed layer 4P of the crotch part B to the recess-unformed layer 4P of the abdominal part A and the dorsal part C is performed more quickly, and at the same time, An excessive diffusion in the vicinity of the outer edge (periphery) in the lateral direction Y of the absorbent body 4D is prevented, and an effect of preventing leakage is produced. From the viewpoint of ensuring such an effect, the recess occupancy ratio (45Pb) in the non-skin facing surface 4b of the crotch part B and the recess occupancy ratio in the skin facing surface 4a of the ventral side A and the back side C ( 45 Pa, 45 Pc) (45 Pa-45 Pb, 45 Pc-45 Pb) is preferably 3% or more, more preferably 5% or more, and preferably 30% or less, more preferably 25% or less, more specifically Is preferably 8% to 20%, more preferably 10% to 15%. The recess occupancy ratios of the abdominal part A, the crotch part B, and the dorsal part C themselves can be set in the same range as in the above embodiment.

  In the absorbent body 4 </ b> E shown in FIG. 9, the depths D <b> 1 </ b> A and D <b> 1 </ b> C of the recesses 45 in the abdominal side A and the back side C gradually become shallower as the distance from the crotch B decreases. With such a configuration, the liquid existing in the absorbent body 4E is less likely to diffuse as it approaches the outer edge in the longitudinal direction X of the absorbent body 4E, thereby effectively preventing liquid leakage from the longitudinal end portion of the absorbent body 4E. Is prevented. On the other hand, the depth D1B of the recess 45 in the crotch B is constant. Moreover, the depth of the recessed part 45X located in the outermost part of the vertical direction X among many recessed parts 45 of each of the abdominal part A and the back side part C is equivalent to the depth D1B of the recessed part of the crotch part B. That is, if the density of the portion where the concave portion 45X is located in the absorbent body 4E (the concave portion non-forming layer 45P) is equal to the density of the portion where the concave portion 45 is located in the crotch B (the concave portion non-forming layer 45P), In 4E, the body fluid is more easily diffused to the ventral part A and the dorsal part C than to the crotch part B. Here, “equivalent” means a state in which one depth (density) is within 10% of that of the other.

  In the absorbent body 4 </ b> F shown in FIG. 10, the proportion of the recess 45 in the unit area of the abdomen A and the back C (the recess occupancy) gradually decreases as the distance from the crotch B decreases. In the absorbent body 4F, such a configuration is realized by gradually increasing the distance between the recesses 45 in the abdominal part A and the dorsal part C as the distance from the crotch part B increases. With such a configuration, the liquid existing in the absorber 4F is less likely to diffuse as it approaches the outer edge in the longitudinal direction X of the absorber 4F, thereby effectively preventing liquid leakage from the longitudinal end of the absorber 4F. Is prevented.

  In the absorbent bodies 4G to 4K shown in FIGS. 11 to 15, the concave portions formed by embossing on the skin facing surface 4a or the non-skin facing surface 4b of the absorbent body 4 are linear concave portions 46 (46a to 46a 46g). The linear recess 46 is a continuous line, and may be a straight line, a curved line, or a bent line. Unlike the concave portion 45 having a circular shape in a plan view, the linear concave portion 46 has a directional shape in a plan view. The linear concave portion 46 functions as a fluid introduction path for the body fluid drawn into the absorber 4, and can guide the body fluid in the extending direction (length direction) of the linear concave portion 46. The width of the linear recess 46 (the length in the direction orthogonal to the length direction of the linear recess) is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, More specifically, it is preferably 1.4 mm or more and 3 mm or less, more preferably 1.8 mm or more and 2.5 mm or less.

  In the absorbent body 4G shown in FIG. 11, a plane extending in the longitudinal direction X on the non-skin facing surface 4b (not shown in FIG. 11) of the crotch B and the skin facing surfaces 4a of the abdominal side A and the back side C. A linear recess 46a that is linear in line of sight is formed. Such a configuration further promotes diffusion transfer of body fluid from the crotch B to the abdominal side A and back side C, prevents surface liquid residue, and reduces discomfort due to skin getting wet with body fluid during wearing. Played even more reliably.

  The absorbent body 4H shown in FIG. 12 is a straight line extending in the lateral direction Y in plan view on the skin facing surfaces of the end portions 4X and 4X on the outer side in the longitudinal direction X of the abdominal side A and the back side C. Except for the point where the recessed part 46b is formed, it is the same as the absorber 4G shown in FIG. Thus, when the linear recessed part 46b extended in the horizontal direction Y is formed in the both ends 4X and 4X of the vertical direction X of the absorber 4H, diffusion of the bodily fluid to the vertical direction X is carried out by this linear recessed part 46b. Therefore, the liquid leakage from the longitudinal end 4X of the absorber 4H is more effectively prevented.

  In the absorbent body 4I shown in FIG. 13, the absorbent body 4J shown in FIG. 14, and the absorbent body 4K shown in FIG. 15, any of the concave portions of the crotch B (the skin facing surface 4a or the non-skin facing surface 4b of the absorbent body 4). The recesses formed by embossing include recesses in a plan view shape and arrangement that improve liquid diffusibility in the vertical direction X, and the recesses in the ventral side A and the back side C are liquid diffusibility in the lateral direction Y. The concave part of the planar view shape and arrangement | positioning which improve is included. More specifically, in the absorbers 4I, 4J, and 4K, the recess of the crotch part B is a continuous or discontinuous linear shape (absorbers 4I and 4K) extending in the longitudinal direction X in plan view, or the longitudinal direction X. Is a continuous or discontinuous line (absorber 4J) extending in the quasi-longitudinal direction with an angle of less than 45 °, and the concave portions of the ventral side A and the back side C are continuous extending in the lateral direction Y in plan view. Alternatively, it is a discontinuous line (absorber 4I) or a continuous or discontinuous line (absorbers 4J and 4K) extending in the quasi-lateral direction with an angle with the transverse direction Y of less than 45 °. Here, when the concave portion is a discontinuous linear shape, the concave portion is intermittently formed in a linear shape, and the intermittent portion (interval between two concave portions adjacent to each other in the linear direction) has no concave portion. It may be a flat part or a concave part (shallow depression) having a depth of 10% or less of the depth of the concave part (deep depression) adjacent to the intermittent part in the linear direction. Such a configuration further promotes diffusion transfer of body fluid from the crotch B to the ventral side A and the dorsal side C, and in the ventral side A and the dorsal side C, the body fluid in the lateral direction Y Since the diffusion transfer is further promoted, the diffusion of the body fluid in the longitudinal direction X is hindered, so that liquid leakage from the longitudinal ends of the absorbers 4I, 4J and 4K is more effectively prevented, and during wearing Reduction of discomfort due to skin getting wet with body fluids is more reliably achieved.

  In the absorbent body 4I shown in FIG. 13, the concave portion of the non-skin facing surface 4b of the crotch B includes only a linear linear concave portion 46a extending in the vertical direction X in plan view. The concave portion C includes only a linear linear concave portion 46b extending in the lateral direction Y in plan view.

  The absorber 4J shown in FIG. 14 is formed with linear recesses 46c to 46f extending in a direction intersecting both the vertical direction X and the horizontal direction Y (hereinafter also referred to as crossing direction) instead of the linear recesses 46a and 46b. Except for this point, it is the same as the absorber 4I shown in FIG. In the absorbent body 4J, the concave portion of the non-skin facing surface 4b of the crotch part B includes only two types of linear linear concave portions 46c and 46d that extend in the intersecting direction (the quasi-vertical direction) and intersect each other in plan view. In addition, the concave portions of the ventral portion A and the dorsal side portion C include only two types of linear linear concave portions 46e and 46f that extend in the intersecting direction (the quasi-lateral direction) in a plan view and intersect each other. The linear recesses 46c and 46d of the crotch part B have an angle formed with a virtual straight line (not shown) parallel to the vertical direction X of less than ± 45 ° and extend substantially along the vertical direction X. On the other hand, the linear recesses 46e and 46f of the ventral portion A and the dorsal portion C have an angle formed with a virtual straight line (not shown) parallel to the lateral direction Y and is substantially less than ± 45 °. It extends along Y.

  The absorbent body 4K shown in FIG. 15 has a V-shaped linear recess 46g in which the recesses of the skin facing surface 4a of the abdominal part A and the back part C protrude inward in the longitudinal direction X in plan view. Except for the points included, it is the same as the absorber 4I shown in FIG. The plurality of (four) V-shaped linear recesses 46g in each of the ventral side A and the back side C have their V-shaped apexes located at the center in the lateral direction Y.

  Hereinafter, the manufacturing method of the absorbent article of this invention is demonstrated, referring drawings based on the preferable embodiment. About the manufacturing method of the absorbent article mentioned later, a different component from the absorbent article (disposable diaper 1) mentioned above is mainly demonstrated, the same code | symbol is attached | subjected to the same component and description is abbreviate | omitted. The explanation about the diaper 1 is appropriately applied to components that are not particularly described. The manufacturing method of the present invention is basically the same as the conventional manufacturing method of this type of absorbent article except for the manufacturing process of the absorbent body, particularly the embossing process of embossing the absorbent body to form the recess. .

  The principal part of the manufacturing method of the absorbent article of 1st Embodiment is shown by FIG. As shown in FIG. 16, the manufacturing method of the absorbent article of 1st Embodiment is an absorber precursor with which the recessed part is not formed by using the horizontal direction Y as supply direction MD between a pair of embossing rolls 10 and 11 which oppose each other. The body 4I ′ (which is formed by covering the absorbent core 40 with the core wrap sheet 41) is supplied to the skin facing surface 4a and the non-skin facing surface 4b of the absorber precursor 4I ′ by a pair of embossing rolls 10 and 11. An embossing process for forming the linear recess 46 is included. That is, in the manufacturing method of the first embodiment shown in FIG. 16, the linear recesses are formed on both surfaces 4a and 4b of the absorber precursor 4I ′ by a single pass between the embossing rolls 10 and 11 of the absorber precursor 4I ′. 46 is formed to obtain the absorber 4I.

  As shown in FIGS. 16A and 16B, each of the embossing rolls 10 and 11 has a cylindrical shape, and the embossing rolls 10 and 11 are formed on both sides of the roll axial center 12 and the roll axial central 12 therebetween. The roll peripheral surface has an embossed portion 20 having one end portion 13 and the other end portion 14 in the roll axis direction and having an embossed convex portion corresponding to the concave portion (linear concave portion). The roll axial direction of the embossing rolls 10 and 11 is parallel to the longitudinal direction X of the supplied absorber precursor 4I '.

  The embossing part 20 on the roll peripheral surface of one embossing roll 10 has a central part 12 in the roll axial direction 12 which is a flat part 19 without irregularities, and an embossed convex part 18b is formed at one end 13 and the other end 14 in the roll axial direction. Has been. The embossing convex part 18b has comprised the linear form extended in the direction orthogonal to the roll-axis direction of the embossing roll 10 in planar view. Here, “plan view” means a case where the embossed convex portion is viewed from the outside in the normal direction of the peripheral surface of the embossing roll (direction perpendicular to the roll axis direction of the embossing roll). The embossing roll 10 has two embossing parts 20 having such a configuration in the roll circumferential direction. The two embossed portions 20, 20 of the embossing roll 10 are arranged at a predetermined interval in the roll circumferential direction, and face each other via the roll axis of the embossing roll 10. As shown in FIG. 16 (a), a plurality of absorber precursors 4I ′ are placed at regular intervals between the embossed portions 20 and 20 adjacent to each other in the roll circumferential direction on the roll circumferential surface of the emboss roll 10. , 11 is an unembossed portion 21 corresponding to the interval when supplied between the first and second portions 11 and 11 and is flat like the flat portion 19.

  The embossed portion 20 on the roll peripheral surface of the other embossing roll 11 has one end portion 13 and the other end portion 14 in the roll axial direction as a flat portion 19, and an embossed convex portion 18 a is formed in the central portion 12 in the roll axial direction. ing. The embossing protrusion 18a has a linear shape extending in the roll axis direction of the embossing roll 11 in plan view. The embossing roll 11 has two embossing parts 20 having such a configuration (FIG. 16B shows only one embossing part 20). The two embossing portions 20 and 20 of the embossing roll 11 are arranged at a predetermined interval in the roll circumferential direction, and are opposed to each other via the roll axis of the embossing roll 11. A portion between the embossed portions 20 and 20 adjacent to each other in the roll circumferential direction on the roll peripheral surface of the emboss roll 11 is a non-embossed portion 21 and is flat like the flat portion 19.

  And in the manufacturing method of the absorbent article of 1st Embodiment, between embossing part 20 of one embossing roll 10 or 11, and the embossing part 20 of the other embossing roll 11 or 10, between both rolls 10 and 11. The rotations of both rolls 10 and 11 are controlled so that the absorber precursor 4I ′ passing through can be simultaneously pressurized. Thereby, as shown in FIG. 16C and FIG. 16D, the absorber precursor 4I ′ passing between both rolls 10 and 11 is subjected to the ventral portion A of the absorber precursor 4I ′ and On one surface (skin facing surface 4a) corresponding to the back side portion C (both ends in the longitudinal direction X orthogonal to the supply direction MD), a linear recess 46b is formed by the embossing protrusion 18b of the embossing roll 10. Further, on the other surface (non-skin facing surface 4b) corresponding to the crotch part B of the absorber precursor 4I ′, the linear recess 46a is formed by the embossed protrusion 18a of the embossing roll 11. Is formed. In the absorber precursor 4I ', the portion pressed by the non-embossed portion 21 (flat portion 19) of both rolls 10 and 11 becomes flat without forming a recess. In this way, the absorber 4I is obtained. As mentioned above, although the manufacturing method of the absorbent article of 1st Embodiment was demonstrated taking the linear recessed part 46 as an example, it can manufacture similarly even if it is another recessed part.

  The principal part of the manufacturing method of the absorbent article of 2nd Embodiment is shown by FIG. The manufacturing method of the absorbent article of the second embodiment is the first shown in FIG. 16 in that the supply direction MD of the absorber precursor 4I ′ is the longitudinal direction X of the absorber precursor 4I ′ (absorber 4I). Different from the manufacturing method of the embodiment. That is, in the method for manufacturing an absorbent article according to the second embodiment, as shown in FIG. 17, an absorption in which a recess is not formed between the pair of embossing rolls 10A and 11A facing each other with the longitudinal direction X as the supply direction MD. The body precursor 4I ′ is supplied, and an embossing process is performed in which a linear recess 46 is formed on the skin facing surface 4a and the non-skin facing surface 4b of the absorber precursor 4I ′ by a pair of embossing rolls 10A and 11A. That is, in the manufacturing method of the second embodiment shown in FIG. 17, the linear recesses are formed on both surfaces 4a and 4b of the absorber precursor 4I ′ in one pass between the embossing rolls 10A and 11A of the absorber precursor 4I ′. 46 is formed to obtain the absorber 4I.

  As shown in FIG. 17B, the pair of embossing rolls 10A and 11A includes an embossing portion 20 having embossing protrusions corresponding to the recesses (linear recesses) formed on the roll peripheral surface, and the embossing protrusions. It has the flat part 19 in which the part is not formed in the roll circumferential direction. That is, the embossing roll 10A has an embossing process in which an embossing convex portion 18b corresponding to the linear concave portion 46b (see FIGS. 17C and 17D) is formed on the roll peripheral surface of the central portion 12 in the roll axial direction. It has the part 20 and the non-embossing part 21 which consists of the flat part 19 in which the embossing convex part 18b is not formed in the roll circumferential direction. Further, the embossing roll 11A has a flat surface in which the embossing projection 20a formed with the embossing projection 18a corresponding to the linear recess 46a is formed on the roll peripheral surface of the central portion 12 in the roll axial direction, and the embossing projection 18a is not formed. A non-embossed portion 21 made of a portion 19 is provided in the roll circumferential direction. Both rolls 10A and 10B each have two embossed portions 20 in the roll circumferential direction. Moreover, the embossing convex part is not formed but the whole area | region of the roll peripheral surface of the roll axial direction one end part 13 and the other end part 14 of both roll 10A, 10B is a flat part. The absorber precursor 4I 'is not supplied between the one end portion 13 and the other end portion 14 of the rolls 10A and 10B in the roll axis direction.

  And in the manufacturing method of the absorbent article of 2nd Embodiment, as shown in FIG.17 (b), the embossing part 20 of one embossing roll 10A or 10B and the non-embossing of the other embossing roll 11A or 10A The rotation of both rolls 10A and 11A is controlled so that the absorber precursor 4I ′ passing between both rolls 10A and 11A can be pressurized simultaneously with the part 21 (flat part 19). As a result, as shown in FIGS. 17 (c) and 17 (d), the absorber precursor 4I ′ that passes between the central portions 12 and 12 in the roll axis direction of both the rolls 10A and 11A is absorbed by the absorber. On one surface (skin facing surface 4a) corresponding to the ventral side A and the back side C of the precursor 4I ′ (both ends in the supply direction MD), the linear concave portion 46b is formed by the embossing convex portion 18b of the embossing roll 10A. The other surface (the non-skin facing surface 4b) corresponding to the crotch part B of the absorber precursor 4I ′ is formed on the other surface (non-skin facing surface 4b) by the embossing convex portion 18a of the embossing roll 11A. The recess 46a is formed, and the absorber 4I is obtained. In the second embodiment, since the supply direction MD of the absorber precursor 4I ′ to both the rolls 10A and 11A is the longitudinal direction X of the absorber precursor 4I ′, first, the absorber precursor 4I ′ Of the portions corresponding to the ventral portion A and the dorsal portion C, a linear concave portion 46b is formed by the embossed convex portion 18b on the portion located on the front side in the supply direction MD, and then the absorber precursor 4I ′. A linear concave portion 46a is formed by the embossed convex portion 18a in the portion corresponding to the crotch portion B, and finally, the supply direction of the portions corresponding to the ventral side portion A and the back side portion C of the absorber precursor 4I ′. A linear concave portion 46b is formed by another embossed convex portion 18b at a portion located on the rear side of the MD. As described above, the manufacturing method of the absorbent article according to the second embodiment has been described by taking the linear concave portion 46 as an example, but even other concave portions can be manufactured in the same manner.

  Although the present invention has been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate. For example, the planar view shape of the recesses 45 (discrete pattern recesses 45) that are not linear in a planar view is not limited to a circular shape, and may be various shapes such as a rhombus shape, an ellipse shape, and a square shape. Moreover, in the said embodiment, although all the many recessed parts 45 were the same shapes, you may mix multiple types of recessed parts from which a shape differs. Moreover, in the said embodiment, although the core wrap sheet | seat was 1 sheet | seat, it is a total of 2 sheets, 1 sheet | seat which coat | covers the skin opposing surface of an absorptive core, and the other 1 sheet | seat which covers a non-skin opposing surface, Also good. In addition, the absorbent article of the present invention is not limited to a deployable disposable diaper, but widely includes articles used to absorb liquid discharged from the human body, and includes a pant-type disposable diaper, a sanitary napkin, and a sanitary short. Etc. are also included. All the parts of only the one embodiment described above can be used together as appropriate. The following additional notes are disclosed with respect to the embodiment of the present invention described above.

<1>
An abdomen which comprises an absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, and is disposed on the stomach side of the wearer It has a dorsal side portion arranged on the side portion and the dorsal side and a crotch portion located between them, and is perpendicular to the longitudinal direction extending from the ventral side portion to the dorsal portion via the crotch portion. An absorbent article having a transverse direction,
In the crotch portion, the non-skin facing surface of the absorbent body has a recess forming region in which many recesses are formed by embossing applied from the non-skin facing surface side. Is not embossed from the skin facing surface side of the absorbent body located on the opposite side, the skin facing surface is flat,
In the ventral side and the dorsal side, the skin-facing surface of the absorbent body has a recess-forming region in which many recesses are formed by embossing applied from the skin-facing surface side. The absorbent article which is not embossed from the non-skin facing surface side of the absorbent body located on the side opposite to the skin facing surface, and the non-skin facing surface is flat.

<2>
The absorbent article according to <2>, wherein a recess non-formation region where the recess is not formed is present in a peripheral portion of the absorber.
<3>
The width of the non-recessed region (the distance between the peripheral edge of the absorber and the recessed region) is preferably 5% or more, more preferably the width of the absorber (lateral length). The absorbent article according to the above <2>, which is 10% or more, preferably 25% or less, more preferably 20% or less, and more specifically preferably 12% or more and 18% or less.

<4>
Regarding the lateral length of the recessed portion forming region, the lateral length of the recessed portion forming region on the non-skin facing surface of the absorbent body in the crotch portion is the width of the absorbent body on each of the abdominal side portion and the back side portion. The absorbent article according to any one of <1> to <3>, which is shorter than that on the skin facing surface.
<5>
The depth of the said recessed part of the said crotch part is an absorbent article as described in any one of said <1>-<4> shallower than that of the said belly side part and the said back side part.
<6>
The absorbent article according to any one of <1> to <5>, wherein a ratio of the concave portion in the crotch portion to a unit area is lower than that in the ventral portion and the dorsal portion.
<7>
The absorbent article according to any one of <1> to <6>, wherein a depth of the concave portion on the abdominal side portion and the back side portion is gradually shallower as the distance from the crotch portion increases.
<8>
The absorptive article according to any one of <1> to <7>, wherein a ratio of the recesses in the unit area of the concave portion in the ventral side portion and the dorsal side portion gradually decreases with distance from the crotch portion. .

<9>
The said recessed part is an absorbent article as described in any one of said <1>-<8> containing a recessed part of planar view line shape.
<10>
The concave portion in the line of plan view is a continuous line and is a straight line, a curved line or a bent line, and the width of the concave portion (the length in the direction perpendicular to the length direction of the concave portion) is preferably 0.5 mm or more. More preferably, it is 1 mm or more, and preferably 5 mm or less, more preferably 4 mm or less, more specifically, preferably 1.4 mm or more and 3 mm or less, more preferably 1.8 mm or more and 2.5 mm or less. The absorbent article according to 9>.

<11>
The concave portion of the crotch portion is a continuous or discontinuous linear shape extending in the vertical direction in a plan view, or a continuous or discontinuous linear shape extending in a quasi-vertical direction whose angle with the vertical direction is less than 45 °, The concave portions of the ventral portion and the dorsal portion are continuous or discontinuous linearly extending in the lateral direction in a plan view, or continuous or discontinuous extending in a quasi-lateral direction with an angle of less than 45 ° with the lateral direction. The absorbent article according to any one of <1> to <10>, which is a linear shape.
<12>
The absorbent article according to <11>, wherein the recesses on the abdomen and the dorsal side include a V-shaped recess that is convex inward in the longitudinal direction in plan view.
<13>
<11> or <12> described above, wherein the straight concave portions extending in the lateral direction in plan view are formed on the skin facing surfaces of the end portions on the outer side in the longitudinal direction of the ventral side portion and the dorsal side portion. Absorbent articles.

<14>
The concave portion has a circular shape in a plan view, and in a discrete pattern over the entire area of the non-skin facing surface of the absorbent body in the crotch and the skin facing surface of the absorbent body in the ventral side portion and the dorsal side portion. The absorbent article as described in any one of said <1>-<13> currently formed in large numbers.
<15>
The absorbent article according to any one of <1> to <14>, wherein a number of the recesses have the same depth and diameter, and the interval between the adjacent recesses is uniform.
<16>
The embossing for forming the recess is hot embossing or ultrasonic embossing,
The absorbent body includes a liquid-retaining absorbent core, and a water-permeable core wrap sheet that covers the skin-facing surface and the non-skin-facing surface of the absorbent core. The absorbent article according to any one of <1> to <15>, wherein the core wrap sheet and the absorbent core are integrated.
<17>
The depth of the recess is preferably 10% or more, more preferably 15% or more, and preferably 70% or less, more preferably 50% or less, more specifically, with respect to the thickness of the absorber. Preferably they are 18% or more and 40% or less, More preferably, they are 20% or more and 30% or less,
The diameter of the concave portion having a circular shape in plan view is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 10 mm or less, more preferably 5 mm or less, more specifically preferably 1.5 mm or more and 3 mm. And
The interval between the adjacent recesses is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 15 mm or less, more preferably 10 mm or less, more specifically preferably 2 mm or more and 5 mm or less. The absorbent article as described in any one of <1>-<16>.
<18>
The ratio of the recesses to the unit area (recess occupancy ratio) is preferably 3% or more, more preferably 7% or more, and preferably 30% or less, more preferably 25% or less, more specifically preferably Is 10% or more and 20% or less, The absorbent article as described in any one of said <1>-<17>.

<19>
The absorbent article according to any one of <1> to <18>, wherein the absorbent article is a disposable diaper.
<20>
The said disposable diaper is an absorbent article as described in said <19> which has a leg gather and a three-dimensional gather.
<21>
The disposable diaper has an hourglass shape in which both side edges along the longitudinal direction of the crotch portion are curved inwardly in an arc shape, and in a plan view, the longitudinal center portion is inwardly bound. The absorbent article as described in <19> or <20>.
<22>
The absorbent body includes a liquid-retaining absorbent core, and a water-permeable core wrap sheet that covers the skin-facing surface and the non-skin-facing surface of the absorbent core. Both side edges along the longitudinal direction of the crotch are curved in an inward arc shape and have a constricted portion, and the central portion in the longitudinal direction is constricted inward in a plan view. The absorbent article as described in any one of 19>-<21>.
<23>
The absorbent core is a fiber aggregate made of hydrophilic fibers such as synthetic fiber treated with wood pulp or a hydrophilizing agent, or a fibrous water-absorbing polymer held in the fiber aggregate, The absorbent article according to <22>, wherein the core wrap sheet is a hydrophilic nonwoven fabric made of paper or a fiber subjected to a hydrophilic treatment.

<24>
The method for producing an absorbent article according to any one of <1> to <23>,
An absorbent body precursor in which the recess is not formed is supplied between a pair of embossing rolls facing each other with the lateral direction as a feeding direction, and the skin facing surface and the non-skin facing surface of the absorbent body precursor are fed by the pair of embossing rolls. Having an embossing step to form the recess in the surface,
Each of the pair of embossing rolls has a roll axis direction center part and roll axis direction one end parts and other end parts located on both sides of the roll axis direction center part, and embossing corresponding to the recesses. It has an embossed part formed with convex parts on the roll peripheral surface,
The embossing part of one of the pair of embossing rolls has a flat central part in the roll axial direction, and the embossing convex part is formed at one end and the other end in the roll axial direction,
The other embossed portion of the pair of embossing rolls is flat at one end and the other end in the roll axial direction, and the embossed convex part is formed at the central portion in the roll axial direction.
The manufacturing method of the absorbent article which can make it pressurize simultaneously the said absorber precursor which passes between both rolls by the said one embossing part of a pair of said embossing roll, and the other said embossing part.

<25>
The method for producing an absorbent article according to any one of <1> to <23>,
Between the pair of embossing rolls facing each other, the absorbent body precursor in which the concave portion is not formed is supplied with the longitudinal direction as the feeding direction, and the skin facing surface and the non-skin facing of the absorbent body precursor are fed by the pair of embossing rolls. Having an embossing step to form the recess in the surface,
Each of the pair of embossing rolls has an embossed portion formed with an embossed convex portion corresponding to the concave portion on a roll peripheral surface, and a flat portion where the embossed convex portion is not formed in the roll circumferential direction.
The manufacturing method of the absorbent article which can be pressurized simultaneously with the said embossing part of one pair of said embossing rolls, and the said other flat part of the said absorber precursor which passes between both rolls.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples.

[Example 1]
According to a conventional method, a deployable disposable diaper having the same basic configuration as the diaper 1 shown in FIGS. 1 and 2 was produced. An air-through non-woven fabric having a basis weight of 41 g / m ² is used as the top sheet, and an aggregate of pulp fibers having a basis weight of 200 g / m ² is held as the absorbent core. Using a basis weight of 186 g / m ² ), a hydrophilic and liquid-permeable paper having a basis weight of 13.5 g / m ² was used as the core wrap sheet. The back sheet was not used.

  FIG. 18 shows the skin facing surface 4a side (surface sheet side) of 4L of the absorber (absorber formed by coating the outer surface of the absorbent core with a core wrap sheet) used in Example 1. The absorbent body 4L has a rectangular shape with rounded corners in plan view, and is provided on the non-skin facing surface (not shown) of the crotch part B and the skin facing surfaces 4a of the ventral side A and the back side C, respectively. Is formed with a recessed portion forming region in which a large number of recessed portions 45 having a circular shape in plan view formed by embossing from the surface side are formed in a discrete pattern. In the absorbent body 4L, on the non-skin facing surface of the crotch B, a plurality of concave portions 45 are arranged in the vertical direction X at predetermined intervals. Are formed in a plurality of rows at predetermined intervals in the lateral direction Y, and the recesses 45 are formed at predetermined intervals in the lateral direction Y on the skin facing surfaces 4a of the ventral side A and the back side C. A plurality of recess rows 45LY (discontinuous linear recesses extending in the horizontal direction Y in plan view) formed in a plurality of rows are formed in the vertical direction X at predetermined intervals. The concave portion 45 having a circular shape in plan view is a shape having no directionality in a plan view and is not a shape in plan view for improving liquid diffusibility in a specific direction, but the concave portion 45 in the crotch portion B forms a concave column 45LX. Accordingly, the concave portions 45 of the ventral side portion A and the back side portion C are formed in the horizontal direction Y by forming the concave portion rows 45LY. The concave portion is arranged to improve liquid diffusibility. The depth of each recess 45 is 1.5 ± 0.3 mm, the diameter of the recess 45 is 1.2 mm, and the interval between the adjacent recesses 45 is 45 mm. The skin facing surface 4a of the crotch part B of the absorbent body 4L and the non-skin facing surfaces of the abdominal side portion A and the back side portion C are flat.

[Comparative Example 1]
In the ventral side and the dorsal side, instead of forming a recess on the skin-facing surface of the absorbent body, the same procedure as in Example 1 was performed except that a recess was formed by embossing from the non-skin facing surface side of the absorbent body. An unfolded disposable diaper was prepared. The absorbent body in the diaper of Comparative Example 1 is the same as that of Example 1 (see FIG. 18), but the recesses on the abdominal part, the crotch part, and the dorsal part are the same. It differs from Example 1 in the point formed.

[Comparative Example 2]
In the crotch part, instead of forming a recess on the non-skin facing surface of the absorbent body, the unfolded disposable diaper is the same as in Example 1 except that a recess is formed by embossing from the skin facing surface side of the absorbent body. Was made. The absorbent body in the diaper of Comparative Example 2 is the same as that of Example 1 (see FIG. 18), but the recesses are formed only on the skin-facing surface. This is different from the first embodiment.

[Comparative Example 3]
An unfolded disposable diaper was produced in the same manner as in Example 1, except that the absorbent body was not embossed at the crotch portion and no recess was formed on the skin facing surface and the non-skin facing surface of the absorbent body.

[Evaluation]
About the diaper of each Example and the comparative example, the liquid diffusion area and the surface liquid residual amount were evaluated by the following method, respectively. The results are shown in Table 1 below.

<Measurement method of liquid diffusion area>
The skin facing surface (surface sheet side) of the diaper to be measured is on the upper side, the diaper is fixed on a horizontal surface in a non-pressurized state, and the absorbent body in the diaper (the absorbent core is covered with a core wrap sheet) An acrylic transparent cup 90 shown in FIGS. 19 (a) and 19 (b) was placed on the top sheet at the center of the absorber. The cup 90 has a hollow cylindrical shape, and one end in the axial direction is an opening 91 and the other end is a bottom 92. When the cup 90 is placed on a diaper to be measured, An axial end surface is in contact with the diaper. The cup 90 has a weight of 100 g, a height of 3 cm, an opening 91 having an outer diameter Ra of 38 mm and an inner diameter Rb of 36 mm. The bottom 92 has a circular shape in plan view with a diameter of 3 mm that penetrates the bottom 92 in the thickness direction. Five apertures 93 are formed. Each of the five apertures 93 is located on two virtual straight lines (crosshairs) orthogonal to each other through the center of the bottom 92 having a circular shape in plan view, and one of them is at the center and the other. Are located 6 mm away from the center. Using a dropping funnel 95 as shown in FIG. 19 (c), 30 ml of physiological saline colored red is put into the opening 91 of the cup 90 placed on the diaper so that the physiological saline does not overflow from the cup 90. The physiological saline was absorbed into the absorber and allowed to stand for 5 minutes. Further, 30 ml of the physiological saline was absorbed into the absorber in the same manner. After 5 minutes from the second injection of physiological saline, the absorbent body is taken out from the disposable diaper, the core wrap sheet of the absorbent body is peeled off, and the skin facing surface and the non-skin facing surface of the absorbent core are colored with physiological saline, respectively. The area of the region is transferred to OHP, the OHP is read by an image recognition device (EPSON, ES-9000N), and measured by image processing using image analysis software (MediaGnetnetics, Imagw-Pro plus, ver7.01.658). The measured value was defined as a liquid diffusion area. It is judged that the liquid diffusion in the surface direction is suppressed as the liquid diffusion area is small, and the evaluation becomes high.

<Measurement method of remaining amount of surface liquid>
The weight (W0) of the surface sheet in the diaper to be measured is measured in advance using a general-purpose electronic balance (A & D Co., Ltd., GX-4000). Place the diaper on the horizontal measuring table of the general-purpose electronic balance in an unpressurized state with the skin-facing surface (surface sheet side) of the diaper to be measured facing upward, and the absorber (absorbent core in the diaper) An acrylic transparent cup 90 shown in FIG. 19 is placed on the top sheet at the center of the absorbent core coated with the core wrap sheet, and the dropping funnel 95 is placed in the same manner as in the above <Method for measuring liquid diffusion area>. In the same manner, a red-colored physiological saline solution (30 ml) was dropped twice and absorbed by the absorber. When 30 seconds have passed since the second physiological saline injection, the surface sheet was taken out from the diaper, and after measuring the weight (W1) of the removed surface sheet, the surface sheet was incorporated into the diaper again (first rearrangement). . Furthermore, when 30 seconds passed from the first rearrangement of the topsheet, the topsheet was taken out from the diaper again, and after the weight (W2) of the taken out topsheet was measured, it was incorporated into the diaper again (second rearrangement). Furthermore, when 60 seconds passed from the second rearrangement of the topsheet, the topsheet was taken out of the diaper again, and the weight (W3) of the taken topsheet was measured. The difference between W1 and W0 (W1−W0) is defined as the remaining amount of the surface liquid 30 seconds after the start of physiological saline injection, and the difference between W2 and W0 (W2−W0) The surface liquid remaining amount after 60 seconds from the start of saline injection was used, and the difference between W3 and WO (W3-W0) was defined as the surface liquid remaining amount after 120 seconds from the start of physiological saline injection. The smaller the remaining amount of each surface liquid, the higher the evaluation.

  As is apparent from Table 1, Example 1 had a small liquid diffusion area on the skin facing surface, and a small amount of surface liquid remaining as compared with each Comparative Example. Comparative Example 1 in which a recess by embossing is formed only on the non-skin facing surface of the absorber and Comparative Example 2 in which a recess by embossing is formed only on the skin facing surface of the absorber are both compared to Example 1. It can be seen that the liquid diffusion area on the skin-facing surface is large, and the skin is easily wetted with body fluids during wearing. In Comparative Example 3, the liquid diffusion area on the skin facing surface was smaller than that in Example 1, but the surface liquid remaining amount was large. From the above, in order to obtain an absorbent article with less surface liquid residue and reduced discomfort due to skin getting wet with body fluids during wearing, The non-skin facing surface is formed with a large number of recesses by embossing from the non-skin facing surface side, and the skin facing surface is flat, and the abdominal and dorsal side absorbers are respectively provided on the skin facing surface. It can be seen that it is effective to form many concave portions by embossing from the skin facing surface side and to make the non-skin facing surface flat.

1 disposable diaper (absorbent article)
2 Top sheet 3 Back sheet 4, 4 </ b> A to 4 </ b> L Absorber 40 Absorbent core 41 Core wrap sheet 45 Recess 46, 46 a to 46 g Linear recess 4 a Absorber skin facing surface 4 b Absorber non-skin facing surface 4 P Layer 4Q Concave forming layer 10, 11, 10A, 11A Embossing roll 12 Embossing roll central portion 13 Embossing roll axial end 1 Embossing roll axial other end 18a Embossing roll axial other end 18a, 18b Embossing projection 19 Flat Part 20 embossed part 21 non-embossed part A ventral side B inseam C back side

Claims (13)

An abdomen which comprises an absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, and is disposed on the stomach side of the wearer It has a dorsal side portion arranged on the side portion and the dorsal side and a crotch portion located between them, and is perpendicular to the longitudinal direction extending from the ventral side portion to the dorsal portion via the crotch portion. An absorbent article having a transverse direction,
In the crotch portion, the non-skin facing surface of the absorbent body has a recess forming region in which many recesses are formed by embossing applied from the non-skin facing surface side. Is not embossed from the skin facing surface side of the absorbent body located on the opposite side, the skin facing surface is flat,
In the ventral side and the dorsal side, the skin-facing surface of the absorbent body has a recess-forming region in which many recesses are formed by embossing applied from the skin-facing surface side. The absorbent article which is not embossed from the non-skin facing surface side of the absorbent body located on the side opposite to the skin facing surface, and the non-skin facing surface is flat.   The absorptive article according to claim 1 in which a crevice non-formation field in which said crevice is not formed exists in a peripheral part of said absorber.   Regarding the lateral length of the recessed portion forming region, the lateral length of the recessed portion forming region on the non-skin facing surface of the absorbent body in the crotch portion is the width of the absorbent body on each of the abdominal side portion and the back side portion. The absorbent article according to claim 1 or 2, wherein the absorbent article is shorter than that on the skin facing surface.   The depth of the said recessed part of the said crotch part is an absorbent article as described in any one of Claims 1-3 shallower than that of the said stomach side part and the said back side part.   The absorptive article according to any one of claims 1 to 4 whose ratio to the unit area of the crevice in the crotch part is low compared with it in the abdominal side part and the back side part.   The absorptive article according to any one of claims 1 to 5 with which the depth of said crevice of said abdominal side part and said back side part becomes shallow gradually as it leaves said crotch part.   The absorptive article according to any one of claims 1 to 6 in which the ratio which occupies the unit area of the crevice in the abdominal part and the back part gradually decreases as it leaves the crotch part.   The said recessed part is an absorbent article as described in any one of Claims 1-7 containing a recessed part of planar view line shape.   The concave portion of the crotch portion is a continuous or discontinuous linear shape extending in the vertical direction in a plan view, or a continuous or discontinuous linear shape extending in a quasi-vertical direction whose angle with the vertical direction is less than 45 °, The concave portions of the ventral portion and the dorsal portion are continuous or discontinuous linearly extending in the lateral direction in a plan view, or continuous or discontinuous extending in a quasi-lateral direction with an angle of less than 45 ° with the lateral direction. The absorbent article according to any one of claims 1 to 8, which has a linear shape.   The absorptive article according to claim 9 in which said crevice of said abdominal side part and said back side part contains a V-shaped crevice convex toward the inside of a lengthwise direction in plane view.   The absorptivity of Claim 9 or 10 in which the said linear recessed part extended in a horizontal direction in planar view is formed in the skin opposing surface of the edge part of the vertical direction outer side of the said ventral | abdominal side part and the said dorsal side part. Goods. It is a manufacturing method of an absorptive article according to any one of claims 1 to 11,
An absorbent body precursor in which the recess is not formed is supplied between a pair of embossing rolls facing each other with the lateral direction as a feeding direction, and the skin facing surface and the non-skin facing surface of the absorbent body precursor are fed by the pair of embossing rolls. Having an embossing step to form the recess in the surface,
Each of the pair of embossing rolls has a roll axis direction center part and roll axis direction one end parts and other end parts located on both sides of the roll axis direction center part, and embossing corresponding to the recesses. It has an embossed part formed with convex parts on the roll peripheral surface,
The embossing part of one of the pair of embossing rolls has a flat central part in the roll axial direction, and the embossing convex part is formed at one end and the other end in the roll axial direction,
The other embossed portion of the pair of embossing rolls is flat at one end and the other end in the roll axial direction, and the embossed convex part is formed at the central portion in the roll axial direction.
The manufacturing method of the absorbent article which can make it pressurize simultaneously the said absorber precursor which passes between both rolls by the said one embossing part of a pair of said embossing roll, and the other said embossing part. It is a manufacturing method of an absorptive article according to any one of claims 1 to 11,
Between the pair of embossing rolls facing each other, the absorbent body precursor in which the concave portion is not formed is supplied with the longitudinal direction as the feeding direction, and the skin facing surface and the non-skin facing of the absorbent body precursor are fed by the pair of embossing rolls. Having an embossing step to form the recess in the surface,
Each of the pair of embossing rolls has an embossed portion formed with an embossed convex portion corresponding to the concave portion on a roll peripheral surface, and a flat portion where the embossed convex portion is not formed in the roll circumferential direction.
The manufacturing method of the absorbent article which can be pressurized simultaneously with the said embossing part of one pair of said embossing rolls, and the said other flat part of the said absorber precursor which passes between both rolls.

Images