JP2014128551A - Absorbent pad - Google Patents

Abstract

[PROBLEMS] To provide an absorbent pad that is easily applied to the wearer's crotch, has a good feeling of wear, and has excellent absorption performance.
An intermediate sheet (10) is interposed between an upper layer (5) and a lower layer (6), and both layers (5, 6) and the intermediate sheet (10) are joined. Both layers 5 and 6 comprise a central absorbent body 7 and a pair of side absorbent bodies 8, and the layers 5 and 6 have a thickness between the central absorbent body 7 and the pair of side absorbent bodies 8. It has a groove 9 penetrating in the direction. The groove 9 of the upper layer 5 and the groove 9 of the lower 6 layer substantially overlap each other in plan view of the absorber 4, and the overlapping portion of both the grooves 9 is open to both side edges along the longitudinal direction X of the front part F. While having the end part 91, it has the linear part 92 extended in the vertical direction X in the crotch part M, and the open end part 91 and the linear part 92 are connected. As a result of the lifting operation when the absorbent pad 1 is worn, the portions near the open end 91 of the side absorbent bodies 8 of both layers 5 and 6 move to the non-skin facing surface side of the central absorbent body 7 of the lower layer 6. And this overlaps.
[Selection] Figure 1

Description

  The present invention relates to an absorbent pad (inner) that is used in an overlapping manner with an absorbent article (outer) such as a disposable diaper.

  Conventionally, for the purpose of reducing the economical and labor burden associated with the treatment of excrement such as urine, an absorbent pad is used in an overlapping manner with absorbent articles such as disposable diapers. For example, a urine-absorbing pad, which is a type of absorbent pad, is placed on the surface sheet of disposable diapers worn by adults (mostly elderly people) whose physical functions have been weakened or weakened by illness. When used for absorbing and holding, when the amount of excreted urine is relatively small, it is only necessary to replace the urine collecting pad, and the frequency of exchanging disposable diapers can be reduced.

  Moreover, in an absorbent pad or an absorbent article, from the viewpoint of improving fit and leakproof property, a groove that penetrates the absorbent body in the thickness direction is formed in the absorbent body. For example, Patent Document 1 describes that, in an absorbent pad including an absorber having a two-layer structure of an upper layer absorber and a lower layer absorber, a lower layer slit penetrating the front and back surfaces is formed in the lower layer absorber. ing. This lower layer slit is opened at both side edges along the longitudinal direction of the rear part of the lower layer absorbent body (the part disposed on the back side of the wearer in the lower layer absorbent body), and has an open end at both side edge parts. And has a linear part extending in the vertical direction at the crotch part (a part of the lower layer absorbent body facing the crotch of the wearer), and the open end part and the linear part are connected to each other. . According to Patent Document 1, the effect of lower layer slits is that the absorption speed is improved by securing a diffusion path of urine and the effect of preventing leakage of urine is mentioned (see description of [0047] in Patent Document 1) ).

  Patent Document 2 describes that in an absorbent pad including an absorber having a two-layer structure of an upper layer and a lower layer, an easy-bending portion made of a slit is formed in the lower layer. The easy-to-bend portion is a linear crotch portion easy-bend portion 3y positioned in the crotch portion (vertical center portion) and extending in the vertical direction, and a linear shape extending in the lateral direction and positioned on the ventral side of the crotch portion. It consists of the ventral side easy bending part 3x, and both the easy bending parts 3x and 3y are connected. According to Patent Document 2, as an effect of the easy folding portions 3x and 3y, an improvement in fit is given by appropriately folding the absorbent pad at both easy folding portions 3x and 3y during wearing (Patent Literature). 2 [0042] to [0047] and the description of [0052] etc.).

  Patent Document 3 discloses that in a disposable diaper having a two-layer absorbent body composed of an upper absorbent body and a lower absorbent body, the lower absorbent body is connected to the central absorbent body and the ventral side portion of the central absorbent body. And a pair of side absorbers provided on both sides of the central absorbent body, and providing a separating portion between the central absorbent body and each of the pair of side absorbent bodies. Yes. The separation part is provided at both side parts of at least the central part in the longitudinal direction of the central absorbent body and is open to both side parts of the rear part. According to Patent Document 3, since the pair of side absorbers rises toward the wearer's skin while the diaper is worn, leakage prevention is improved (Patent Document 3 [Claim 1], [See description of [0041] and [0044]).

JP 2012-10951 A JP 2009-219826 A JP 2006-141761 A

  In recent years, when wearing absorbent articles such as disposable diapers while sleeping at night, the viewpoint of allowing the wearer to sleep, and the viewpoint of reducing the labor of those who perform replacement work of the absorbent articles (caregivers, etc.) Therefore, there is a demand for an absorbent pad with a high absorption capacity that exhibits stable absorption performance over a long period of time and can be worn continuously. In order to make the absorbent pad have a high absorption capacity, it is effective to increase the size in the vertical direction and the horizontal direction, but such a large absorbent pad is difficult to apply to the wearer's crotch. It is difficult to follow the wearer's body, and a gap may be formed between the wearer's skin and the wearer's skin during wearing, and there is room for improvement in wear feeling and leakage prevention. Thus, in an absorptive pad, coexistence of a good feeling of wear, ease of application, and absorption performance is an issue.

  The absorbent pad or the disposable diaper described in Patent Documents 1 to 3 is worn as compared with the conventional product by forming the grooves (slits, separation parts) penetrating the absorbent body in the thickness direction as described above. Although certain improvements are observed in various characteristics such as feeling and absorption performance, there is room for improvement. There has not yet been provided an absorbent pad that achieves both ease of application to the wearer's crotch and a feeling of wear and absorption performance.

  Therefore, the subject of this invention is related with the absorbent pad which is easy to apply to a wearer's crotch part, a feeling of wear is favorable, and is excellent in absorption performance.

  The present invention comprises a main body comprising a top sheet that forms a skin-facing surface, a back sheet that forms a non-skin-facing surface, and an absorbent body interposed between both sheets, and a longitudinal direction that corresponds to the front-rear direction of the wearer. An absorbent pad having a transverse direction perpendicular thereto, wherein the absorbent body is disposed opposite to the wearer's crotch when worn, and is disposed closer to the wearer's stomach than the crotch A laminated structure having a front part and a rear part arranged on the back side of the wearer from the crotch part in the vertical direction, and comprising an upper layer and a lower layer arranged on the non-skin facing surface side of the upper layer An intermediate sheet is interposed between the upper layer and the lower layer, both of these layers and the intermediate sheet are joined, and the upper layer and the lower layer are respectively a central absorber and And connected at the crotch part or the rear part of the central absorbent body and the A pair of side absorbers provided on both sides of the central absorber, and a groove penetrating the layer in the thickness direction between the central absorber and each of the pair of side absorbers. The upper layer groove and the lower layer groove substantially overlap each other in plan view of the absorber, and the overlapping portion of both grooves is open to both side edges along the longitudinal direction of the front portion. And has open ends on both side edges, and has a linear portion extending in the longitudinal direction at the crotch portion, and the open end and the linear portion are connected to each other. The problem is solved by providing a pad.

  ADVANTAGE OF THE INVENTION According to this invention, the absorptive pad which is easy to apply to a wearer's crotch part, a feeling of wear is favorable, and is excellent in absorption performance is provided.

FIG. 1 is a plan view schematically showing the skin-facing surface side (surface sheet side) of the absorbent pad in an expanded state, in which each part of an embodiment of the absorbent pad of the present invention is extended and expanded in a planar shape. It is. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 3A is a plan view schematically showing an upper layer of the absorbent body in the absorbent pad shown in FIG. 1, and FIG. 3B is a plan view schematically showing a lower layer of the absorbent body. FIG. 4 is a cross-sectional view schematically showing how the absorbent pad shown in FIG. 1 is used, and is a view corresponding to FIG. 2 showing a state in which the absorbent pad is disposed on the skin facing surface side of the disposable diaper. FIG. 5 is a cross-sectional view schematically showing a wearing state of the absorbent pad shown in FIG. 6 (a) to 6 (c) are diagrams for explaining the state of the absorbent body when the absorbent pad is worn, and FIG. 6 (a) shows the absorbent body according to the present invention. 6 (b) and FIG. 6 (c) both show absorbers outside the scope of the present invention.

  Hereinafter, the absorptive pad of the present invention is explained based on the desirable embodiment with reference to drawings. As shown in FIGS. 1 and 2, the absorbent pad 1 of the present embodiment is interposed between a top sheet 2 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and both sheets 2 and 3. And a longitudinal direction X corresponding to the wearer's front-rear direction and a transverse direction Y orthogonal thereto.

  In the present specification, the skin-facing surface is a surface of the absorbent pad or its constituent members (for example, the absorbent body 4 and the main body 15) that is directed toward the wearer's skin when the absorbent pad is worn. The facing surface is a surface of the absorbent pad or a component thereof directed to the side opposite to the skin side (clothing side) when the absorbent pad is worn. Moreover, the vertical direction X corresponds to the direction (longitudinal direction) along the long side of an absorptive pad or its component member, and the horizontal direction Y corresponds to the width direction of an absorptive pad or its component member.

  The main body 15 (absorber 4) is long in one direction (vertical direction X) in a plan view as shown in FIG. As shown in FIG. 2, the top sheet 2 that forms the skin facing surface of the main body 15 covers the entire area of the skin facing surface of the absorbent body 4, and the back sheet that forms the non-skin facing surface of the main body 15. 3 covers the whole area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction of the absorbent body 4 (both side edges along the longitudinal direction of the lower layer to be described later). ing. Moreover, both the sheets 2 and 3 are respectively the front end (vertical direction edge part by the side of the front part F mentioned later) and rear end (vertical direction edge part by the side of the back part R mentioned later) of the longitudinal direction X of the absorber 4, respectively. Are extended to the outside in the longitudinal direction X, and are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal at the extended portions.

  The absorbent body 4 that is one of the main characteristic parts of the present embodiment will be described. The absorbent body 4 includes a crotch portion M that is disposed opposite to the wearer's crotch when worn, and the wearer's belly more than the crotch portion M. It has the front part F distribute | arranged to the side and the back part R distribute | arranged to a wearer's back side rather than this crotch part M in the vertical direction X. “At the time of wearing” here means a state in which a normal appropriate wearing position (correct wearing position of the absorbent pad) is maintained, and includes when the absorbent pad is deviated from the wearing position. Absent. The front part F, the crotch part M, and the rear part R are approximately 3 etc. in the longitudinal length X of the absorbent body 4 in an expanded state in which each part of the absorbent pad is extended to expand the absorbent pad in a planar shape. Each area is divided into three areas as shown. The absorber 4 and each of the top sheet 2 and the back sheet 3 are joined by an adhesive.

  The absorber 4 is configured to include a laminated structure (two-layer structure) including an upper layer 5 and a lower layer 6 disposed on the non-skin facing surface side of the upper layer 5. As shown in FIG. 2, the upper layer 5 covers the entire upper absorbent core 50 mainly composed of a water-absorbing material and at least the skin-facing surface (facing the surface sheet 2) of the upper absorbent core 50. One lower layer core wrap sheet 51 is included, and the lower layer 6 is also composed of a lower layer absorbent core 60 mainly composed of a water-absorbing material, and at least a skin-facing surface of the lower layer absorbent core 60 ( And a single lower core wrap sheet 61 covering the entire area of the surface facing the upper layer 5. The skin-facing surface of the upper absorbent core 50 and the upper-layer core wrap sheet 51 are joined by an adhesive, and the skin-facing surface and the non-skin-facing surface of the lower absorbent core 60 are also bonded to the lower-layer core wrap sheet 61. It is joined by the agent.

  Since the upper layer 5 and the lower layer 6 are configured in this manner, the other absorbent core that extends outward in the vertical direction X from the end in the vertical direction X of one of the upper and lower layers 5, 6. In the longitudinally extending portion, the entire areas of the skin facing surface and the non-skin facing surface are covered with the core wrap sheets 51 and 61, so that the absorbent material from the longitudinally extending portion of the other absorbent core Movement, in particular, movement of the water-absorbing polymer to the top sheet 2 side or the back sheet 3 side is effectively prevented. When the water-absorbing polymer in the absorbent core moves to the surface sheet 2 side, the water-absorbing polymer is applied to the skin of the wearer when the particle size of the water-absorbing polymer is smaller than the interfiber space such as the nonwoven fabric constituting the surface sheet 2. May cause skin problems. Moreover, if the water-absorbing polymer in the absorbent core moves (drops) to the back sheet 3 side, it may cause holes in the back sheet 3 and lead to leakage. Further, in the present embodiment, as will be described later, when the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, particularly when lifting the longitudinal end portion for mounting the absorbent pad 1, If the length of the intermediate sheet 10 in the longitudinal direction X is short, for example, when the pad 1 is reapplied several times, the absorption extends to the outside in the longitudinal direction X from the longitudinal end of the intermediate sheet 10. There is a possibility that the shape of the longitudinally extending portion of the conductive core may collapse and approach the longitudinally central portion. The above inconvenience is effectively prevented by the upper layer 5 and the lower layer 6 being configured as described above, and as a result, good fit of the absorbent pad 1 is maintained.

  The length (width) in the lateral direction Y of the upper layer core wrap sheet 51 is substantially the same as or wider than the crotch part M in the upper layer absorbent core 50. On the other hand, the length (width) in the lateral direction Y of the lower layer core wrap sheet 61 is at least twice the maximum width of the portion of the lower layer absorbent core 60 where the length (width) in the lateral direction Y is the longest. The lower layer core wrap sheet 61 covers the whole area of the skin facing surface of the lower layer absorbent core 60 and the non-skin facing surface on the opposite side thereof. The lower layer 6 has the lower layer absorbent core 60 placed on the central portion in the lateral direction Y of this one lower layer core wrap sheet 61, and both sides in the lateral direction Y are folded back to the upper surface side of the lower layer absorbent core 60. The both side edge portions are joined by a known joining means such as a hot melt adhesive to form a lower core wrap sheet 61 in a cylindrical shape, and obtained by turning upside down.

  As shown in FIG. 2, an intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and each of these layers 5 and 6 and the intermediate sheet 10 are joined by an adhesive. In the present embodiment, one intermediate sheet 10 is bonded to each of the upper absorbent core 50 and the lower core wrap sheet 61 with an adhesive. With such a configuration, the upper layer 5 and the lower layer 6 are connected to the intermediate sheet 10. It is integrated through. The length in the vertical direction X and the length (width) in the horizontal direction Y of the intermediate sheet 10 are substantially the same as the length in the vertical direction X and the length (width) in the horizontal direction Y of the upper core wrap sheet 51. The intermediate sheet 10 extends outward in the longitudinal direction X from the end in the longitudinal direction X (the longitudinal end on the front portion F side) of one of the upper layer 5 and the lower layer 6 (the lower layer 6 in this embodiment). The entire surface of one surface (the non-skin-facing surface of the upper absorbent core 50 in this embodiment) of the other (the upper layer 5 in this embodiment) longitudinally extending portion of the absorbent core is covered. By arranging the intermediate sheet 10 in this way, the above-described disadvantage caused by the movement of the absorbent material (water absorbent polymer) is effectively prevented.

  As shown in FIGS. 1 to 3, the upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) are respectively a central absorbent body 7 and a crotch M or the rear of the central absorbent body 7. A pair of side absorbers 8 and 8 connected to each other at the portion R and provided on both sides of the central absorber 7, and the central absorber 7 and the pair of side absorbers 8 and 8, respectively. In between, there is a groove 9 penetrating the layers 5 and 6 in the thickness direction.

  In the present embodiment, the central absorbent body 7 of each of the upper layer 5 and the lower layer 6 has a lateral direction in a region extending from the front part F to the crotch part M toward the crotch part M as shown in FIG. A portion having a substantially planar isosceles trapezoidal shape portion 70 in which the length (width) of Y gradually decreases and a planar view belt-like portion 71 having a constant width, and a relatively short width in the isosceles trapezoidal shape portion 70 The strip portions 71 are connected to each other to form both portions 70 and 71 integrally. Further, the pair of side absorbent bodies 8 and 8 of each of the upper layer 5 and the lower layer 6 sandwich the central absorbent body 7 so as to be along the side edges along the longitudinal direction X of both portions 70 and 71 of the central absorbent body 7. The two absorbers 7 and 8 are integrally formed by being connected to the central absorber 7 at the crotch part M.

  Since the shape of the central absorbent body 7 and the side absorbent body 8 in the upper layer 5 and the lower layer 6 in a plan view is such a specific shape, when the absorbent pad 1 is worn, the front side sock is removed from the crotch of the wearer. The absorbent body 4 is easily bent along the portion, and the absorbent body 4 is more likely to hit the wearer's body. As a result, the absorbent body 4 always comes into contact with the urination part of the wearer without wrinkles or twists, so that the absorbent body 4 can stably exhibit the absorption performance, and the absorbent body 4 along the body. Therefore, for example, when irregularities (mountains and valleys) are intentionally formed in the absorbent body, there is no sense of discomfort that may be given to the wearer, and the mounting performance of the absorbent pad 1 is improved.

  From the viewpoint of facilitating deformation of the front part F and the central absorbent body 7 of the absorbent body 4 along the wearer's body and improving the feeling of wear and leakage prevention, the upper layer 5 (upper absorbent core 50) and the lower layer 6 One of the lower layer absorbent cores 60 preferably extends outward in the longitudinal direction X from the longitudinal end on the front portion F side of the other. In this embodiment, as shown in FIGS. 1 and 3, the upper layer 5 (upper absorbent core 50) extends from the longitudinal end 6 f on the front portion F side in the lower layer 6 (lower absorbent core 60) in the longitudinal direction X. It extends outside. The extension length 5LE (see FIG. 1) of the upper layer 5 from the longitudinal end 6f of the lower layer 6 is preferably 20 mm or more, more preferably 40 mm or more, and preferably 120 mm or less, more preferably 100 mm or less, more specifically. Specifically, it is preferably 20 mm or more and 120 mm or less, more preferably 40 mm or more and 100 mm or less.

  Moreover, in this embodiment, as shown in FIG.1 and FIG.3, the dimension in planar view of the lower layer 6 (lower layer absorbent core 60) is made smaller than this dimension of the upper layer 5 (upper layer absorbent core 50). More specifically, the lower layer 6 is made shorter than the upper layer 5 at least in the longitudinal direction X. One of the main roles of the lower layer 6 is to absorb and hold body fluids such as urine excreted from the excretion part of the wearer in the excretion part facing part and the peripheral part thereof facing the excretion part in the absorbent pad 1. In view of such a role of the lower layer 6, the upper layer 5 and the lower layer 6 do not necessarily have the same shape and dimensions, and the size of the lower layer 6 (lower layer absorbent core 60) in plan view is the upper layer 5 ( Although it may be equal to the dimension of the upper absorbent core 50), it is sufficient that the lower layer 6 is smaller than the upper layer 5 as in this embodiment. In that case, it is preferable that the lower layer 6 having a smaller size in plan view than the upper layer 5 is disposed at least in the excretory part-facing part and its peripheral part. The “peripheral part of the excretory part facing part” is preferably a part closer to the rear part R than the excretion part facing part, and more preferably a part within 50 mm rearward from the excretion part facing part. . The excretory part-facing part is usually present in a part that is biased toward the rear part R side from the central part in the lateral direction Y of the absorbent pad 1 and from the central part in the vertical direction X.

  The groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 substantially overlap each other in a plan view of the absorber 4 as shown in FIG. 1, and the overlapping portion 90 of the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 is The front portion F is open at both side edges along the vertical direction X and has open end portions 91 at both side edges, and the crotch M has a linear portion 92 extending in the vertical direction X, Moreover, the open end 91 and the linear portion 92 are connected. That is, in the present invention, “the upper groove 9 and the lower groove 6 substantially overlap in the plan view of the absorber 4” means that the upper groove 9 and the lower layer 6 in the plan view of the absorber 4. It suffices that the overlapping portion 90 with the groove 9 has a continuous specific shape having the open end portion 91 and the linear portion 92 as described above, and the upper layer groove 9 and the lower layer 6 groove 9 are in plan view. However, the upper-layer groove 9 and the lower-layer groove 9 are slightly shifted in plan view, but the overlapping portion 90 includes the case where the specific shape is present. In this embodiment, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 have the same shape and the same dimensions, and the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are completely coincident in plan view. The groove 9 in the upper layer 5 and the groove 9 in the lower layer 6 have a continuous specific shape having an open end portion 91 and a linear portion 92, as in the overlapping portion 90.

  In the present embodiment, as shown in FIG. 1, the grooves 9 (overlapping portions 90) of the upper and lower layers 5 and 6 are arranged in the front of the vertical direction X of the linear portion 91 in the front of the vertical direction X and in the horizontal direction Y. A bent portion 94 extending outward is provided, and the open end 91 and the linear portion 92 are connected via the bent portion 94. Further, as shown in FIG. 1, the absorbent body 4 (upper layer 5) is front and rear in the longitudinal direction X across the front side in the longitudinal direction X from the rear part R, more specifically, the front part F and the crotch M. The side edge along the vertical direction X of the constricted part has a linear side edge 4S1 extending along the vertical direction X and the linear side edge. A bent side edge 4S2 extending from the front end in the vertical direction X of 4S1 to the front in the vertical direction X and outward in the horizontal direction Y is formed. And the bending part 94 of the groove | channel 9 (overlapping part 90) exists in the extension line of this bending side edge 4S2, or its vicinity (within 80 mm from this extension line).

  As shown in FIG. 4, the absorbent pad 1 of the present embodiment can be used by being disposed on the skin facing surface side of a disposable diaper 100 as a separate absorbent article. The disposable diaper 100 used in combination with the absorbent pad 1 includes a liquid-permeable surface sheet 101 that forms a skin-facing surface, a liquid-impermeable back sheet 102 that forms a non-skin-facing surface, and a space between both sheets 101 and 102. In the same manner as the absorbent pad 1, the absorbent body 103 is long in one direction. A pair of three-dimensional gathers 104 and 104 having elastic members are provided on both sides of the disposable diaper 100 on the skin facing surface side along the longitudinal direction X, and the outer side of the absorbent body 103 in the lateral direction Y is A pair of leg flap portions 105, 105 having elastic members are provided.

  Since the absorbent pad 1 of the present embodiment includes the absorbent body 4 having the above-described characteristic configuration, the absorbent body 4 is deformed as shown in FIG. As a result, it is possible to achieve both ease of application to the wearer's crotch, good wearing feeling and stable absorption performance. In addition, the code | symbol 200 in FIG. 5 is a crotch (groin part) of the wearer of an absorptive pad. Further, from the viewpoint of easy explanation, in FIG. 5, illustration of some of the constituent members of the absorbent pad 1 (core wrap sheets 51 and 61, intermediate sheet 10 and the like) is omitted.

  In general, a gap is generated between the wearer's excretory part and the absorbent pad (placement part of the absorbent body in the absorbent pad) due to reasons such as an inappropriate wearing method, or the absorbent body around the excretory part is wrinkled. When urine has occurred, excreted fluid such as urine is not absorbed by the absorber in those areas where it is generated, but travels through the wearer's skin to other parts of the absorber, where When concentrated locally and absorbed, the liquid absorption retention capacity of such a concentrated portion of excreted liquid immediately becomes saturated, and liquid leakage is likely to occur. As means for avoiding such inconvenience, as shown in FIGS. 6 (b) and 6 (c), the absorbent body 4 ′ is provided with a groove 9 ′ penetrating the absorbent body 4 ′ in the thickness direction. It is conceivable to provide two along the longitudinal direction X so as to extend from the crotch part to the front throat part. 6 (b) and 6 (c) includes a central absorbent body 7 and a pair of side absorbent bodies 8 and 8 provided on both sides of the central absorbent body 7. In addition, a groove 9 ′ extending in the longitudinal direction X and penetrating the absorber 4 ′ in the thickness direction is provided between the central absorber 7 and each of the pair of side absorbers 8 and 8. In the form shown in FIG. 6C, two grooves 9 ′ and 9 ′ extending in the vertical direction X are opened at both ends in the vertical direction along the horizontal direction Y of the absorber 4 ′. It differs from the embodiment shown in FIG. 6B that does not have such an open end only in that it has open ends at both ends.

  However, the absorbent pad (not shown) having the absorbent body 4 'shown in FIG. 6B or 6C has the following problems when worn. That is, when the front part of the absorbent pad is gripped by hand and pulled up to the wearer's crotch side as usual in order to wear the absorbent pad having the absorbent body 4 ′, FIG. 6 (b) and As shown in FIG. 6 (c), when a lifting force U that pulls the portion toward the crotch side is applied to the front side (upper side in FIG. 6) of the central absorber 7 of the absorber 4 ', the lifting force U Thus, not only the front part side of the central absorbent body 7 but also the front part side of each of the pair of side absorbent bodies 8, 8 located on both sides thereof is substantially simultaneously with the front part side of the central absorbent body 7. Pulled up. In addition, the pair of side absorbent bodies 8 and 8 always receive an inward pressing force P by the wearer's thigh at the crotch part (the central part in the longitudinal direction X of the absorbent body 4 ′). It is pushed to the central absorber 7 side. Therefore, during the pulling up of the absorbent pad to the crotch side, the side absorbent body 8 pulled up almost simultaneously with the central absorbent body 7 is pushed inward in the lateral direction Y by the pressing force P, and the central absorbent body 7. Contact with the side surface (the wall surface defining the groove 9), whereby wrinkles are generated in the central absorbent body 7, or the side absorbent body 8 moves to the skin facing surface side of the central absorbent body 7 And the absorber 4 'may not be bent so as to follow the wearer's ridge. If wrinkles occur in the central absorbent body 7 or the side absorbent bodies 8 overlap the skin-facing surface of the central absorbent body 7, the adhesion between the wearer's excretory part and the absorbent pad cannot be ensured and absorbed. Performance may be reduced.

  On the other hand, in the absorbent pad 1 of the present embodiment, the overlapping portion 90 of the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 constituting the absorber 4 has the open end 91 and the straight line as described above. Since it has the continuous specific shape which has the shape part 92, the absorber 4 can be easily bent so that a wearer's ridge part may be followed, FIG.6 (b) and FIG.6 (c). The inconvenience that is anxious about the absorber 4 ′ shown is unlikely to occur. That is, in order to wear the absorbent pad 1 of the present embodiment having the absorbent body 4 (upper layer 5 and lower layer 6), the front part F of the absorbent pad 1 is gripped by hand as usual. As shown in FIG. 6 (a), a lifting force U for lifting the portion toward the crotch side acts on the front part F side (upper side in FIG. 6) of the central absorbent body 7 of the absorbent body 4 as shown in FIG. 6 (a). Sometimes, by the lifting force U, first, the front portion F side of the central absorbent body 7 is pulled up to the crotch side, and then a pair of pairs located on both sides thereof with a slight delay from the front portion F side of the central absorbent body 7. The front portion F side of each of the side absorbers 8 and 8 (the portion near the open end 91 in the side absorber 8 of each of the upper layer 5 and the lower layer 6) is pulled up to the crotch side. Then, as described above, the pair of side absorbers 8 and 8 always receive the inward pressing force P by the wearer's thighs at the crotch part M (see FIG. 1). When it is pushed to the central absorbent body 7 side while being pulled up, the front part F side of the central absorbent body 7 is pulled up ahead of the front part F side of the side absorbent body 8, whereby the side absorbent body 8 is located above the front portion F side of 8 and is not located on the side of the front portion F side of the side absorbent body 8. As shown in FIG. 5, the front portion F side of the body 8 moves to the non-skin facing surface side of the central absorbent body 7 and overlaps therewith. In FIG. 6A, only a part of the absorber 4 (the overlapping portion of the upper layer 5 and the lower layer 6) is schematically illustrated from the viewpoint of easy explanation.

  Moreover, when the front part F side of the absorber 4 (the upper layer 5 and the lower layer 6) is pulled up to the wearer's inseam side, the wearer's skin surface of each of the pair of side absorbers 8 and 8 in the upper layer 5 Due to friction with the inner crotch, a resistance force against pulling acts, whereby a shearing force acts between the upper layer 5 and the lower layer 6 and the layers 5 and 6 try to separate in the vertical direction. If the upper layer 5 and the lower layer 6 are directly overlapped without the intermediate sheet 10 interposed therebetween, the two layers 5 and 6 can be separated easily without resisting the separating action of the two layers 5 and 6 in the vertical direction. The groove 9 may be displaced. On the other hand, in the absorbent pad 1 of the present embodiment, as described above, the intermediate sheet 10 is interposed between the upper layer 5 and the lower layer 6, and both these layers 5 and 6 are joined to the intermediate sheet 10. For this reason, the layers 5 and 6 are difficult to separate in the vertical direction by the pulling-up operation of the absorbent pad 1 toward the skin, and the grooves 9 are not easily displaced.

  In short, the absorbent pad 1 of the present embodiment is first placed after the absorbent pad 1 is pulled up to the crotch side of the wearer while being disposed on the skin facing surface side of the disposable diaper 100 as shown in FIG. When the diaper 100 is pulled up, the portions near the open end 91 in the side absorber 8 of each of the upper layer 5 and the lower layer 6 constituting the absorber 4 are located on the non-skin facing surface side of the central absorber 7 of the lower layer 6. It moves integrally and overlaps with this, and it fits along the wearer's ridge part by deformation of the absorber 4 and can adhere to the wearer's excretion part without any gaps or wrinkles. Therefore, it is possible to achieve both ease of application to the wearer's crotch, good wearing feeling and stable absorption performance.

  In particular, in the present embodiment, as shown in FIGS. 1 and 3, the groove 9 is a straight line extending in the longitudinal direction X at least at the rear part of the crotch part M (the part near the rear part R of the crotch part M). The groove 9 (overlapping portion 90) in the rear portion of the crotch M is a linear shape extending in the longitudinal direction X in plan view. On the other hand, the groove in the rear part of the crotch M is not a linear shape extending in the longitudinal direction X in plan view, but has a bent portion and faces the side edge along the longitudinal direction X of the absorber 4. When the absorbent pad is formed, since the force from the inner crotch portion decreases as the crotch part M is located rearward when the absorbent pad is worn, the portion located in the rear part of the crotch part M in the groove has a certain amount. It becomes a liquid diffusion guiding path having a width, and it becomes easy to guide the liquid to the side edge of the absorber or the vicinity thereof. And if a liquid concentrates in the side edge vicinity of an absorber, since the absorptive material which comprises an absorber (absorbent core) will reach saturation easily, a liquid will overflow from an absorber and it will be easy to lead to a leak. As in the present embodiment, since the groove 9 (overlapping portion 90) in the rear portion of the crotch M has a linear shape extending in the longitudinal direction X in plan view, such inconvenience is effectively prevented.

  In the crotch M, if the length (width) in the lateral direction Y of the lower layer 6 (lower absorbent core 60) is equal to or smaller than that of the upper layer 5 (upper absorbent core 50), absorption occurs. When the sexual pad 1 is worn, a relatively high-rigidity member such as an absorber comes into contact with the wearer's skin on a smooth surface, thereby effectively preventing pressure concentration. On the contrary, if the width of the upper layer 5 is smaller than the width of the lower layer 6, the surface on which a step due to the width of the both layers 5 and 6 is present comes into contact with the wearer's skin. It is not preferable. Accordingly, the width of the lower layer 6 is preferably equal to or smaller than the width of the upper layer 5. In particular, when the width of the lower layer 6 is smaller than the width of the upper layer 5, the side portion along the vertical direction X of the upper layer 5 covers the side section along the vertical direction X of the lower layer 6. The side end surface along the vertical direction X becomes a smooth curved surface, and thereby the force of the absorber end surface applied to the inner crotch portion of the wearer is reduced, and it is difficult to place a burden on the skin.

  Moreover, in this embodiment, the groove | channel 9 is formed only in the front part F and the crotch part M in the absorber 4, and is not formed in the back part R. FIG. The reason is that when the overlap or wrinkles between the upper layer 5 and the lower layer 6 described above occurs in the rear portion R, particularly the portion located below the wearer's buttocks when worn, pressure is locally applied to the wearer's skin. It is easy to cause skin trouble. If a groove is formed in the rear portion R (the portion to which the load of the buttocks is applied when worn), the groove has a force in the direction of narrowing its width (the length in the direction perpendicular to the length direction of the groove). Since the groove is hardly applied, the groove retains its shape as a step when the absorbent pad is worn, and the groove is easily overlapped by the force applied when wearing or changing the posture. As a result, body pressure is applied to the groove. Concentrates easily and causes skin problems. Therefore, in order to avoid such inconvenience and to make the above-described operation and effect more reliable, the rear portion R (the portion to which the load of the buttocks is applied when worn) is absorbed as in this embodiment. It is preferable not to provide an opening end portion of the groove at both side edges along the longitudinal direction of the absorbent body 4 such as a groove penetrating the body 4 (upper layer 5 and lower layer 6) in the thickness direction and an opening end portion 91. .

The deformation of the absorber 4 as shown in FIG. 5, that is, “the side absorber 8 is bent at the groove 9 and the portions near the open end 91 in the side absorber 8 of each of the upper layer 5 and the lower layer 6 are the lower layer. From the point of view of making sure that “6 move to the non-skin facing surface side of the central absorbent body 6 and overlap it”, the width 9W of the groove 9 (see FIG. 3; the length direction of the groove 9 and Is preferably larger than the thickness of the absorbent body 4 under no pressure. In the absorber 4 under no pressure, the ratio of the width 9W of the groove 9 to the thickness of the absorber 4 (width 9W / thickness of the absorber 4) is preferably 2.0 or more, more preferably 4.0 or more, And preferably it is 10.0 or less, More preferably, it is 7.0 or less, More specifically, Preferably it is 2.0 or more and 10.0 or less, More preferably, it is 4.0 or more and 7.0 or less. Here, the thickness under no pressure means the thickness under a pressure of 0.5 cN / cm ³ obtained by the following measurement method.

<Measurement method of absorber thickness>
Spray cold spray (trade name) manufactured by Nichiban Co., Ltd. from the surface of the absorbent pad. Thereafter, the constituent material other than the absorber is carefully peeled off from the absorbent pad. A circular plate having a weight of 2.5 g and a radius of 12.5 mm is placed on the measurement table, and the position of the upper surface of the circular plate in this state is set as a reference point A for measurement. Next, the circular plate is removed, the absorber to be measured is placed on the measurement table, the circular plate is placed again thereon, and the position of the upper surface of the circular plate in that state is defined as position B. A laser displacement meter (manufactured by Keyence Corporation, CCD laser displacement sensor LK-080) is used as a measuring instrument. The difference between the reference point A and the position B is defined as the thickness of the absorber under no pressure, that is, the thickness of the absorber under a pressure of 0.5 cN / cm ³ .

The width 9W of the groove 9 is preferably 5 mm or more, more preferably 10 mm or more, and preferably 40 mm or less, more preferably 30 mm or less, more specifically preferably 5 mm or more and 40 mm or less, more preferably 10 mm or more and 30 mm. It is as follows. In the present embodiment, in each of the upper layer 5 and the lower layer 6, the width 9W of the groove 9 is constant over the entire length, and as described above, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are Same shape and size.
The thickness of the absorber 4 under no pressure (the total thickness of the upper layer 5 and the lower layer 6 under no pressure) is preferably 1.0 mm or more, more preferably 2.0 mm or more, and preferably 10. It is 0 mm or less, More preferably, it is 7.0 mm or less, More specifically, Preferably it is 1.0 mm or more and 10.0 mm or less, More preferably, it is 2.0 mm or more and 7.0 mm or less.

  Moreover, from a viewpoint which suppresses that wrinkles generate | occur | produce in the absorber 4 at the time of wear, and reduces the uncomfortable feeling at the time of wear, in the pair of side part absorbers 8 and 8 in the center absorber 7 of each of the upper layer 5 and the lower layer 6 The length (width) 71W (see FIG. 3) in the lateral direction Y of the sandwiched portion (band-like portion 71) is preferably set to be equal to or smaller than the wearer's crotch width, more specifically 70 mm or less, particularly 50 mm. It is preferable to set the following. On the other hand, from the viewpoint of stably adhering the excretory part of the wearer and the absorbent pad 1, the length 71W of the belt-like portion 71 is preferably set to 20 mm or more, particularly 30 mm or more. Therefore, the length 71W in the lateral direction Y of the belt-like portion 71 of the central absorbent body 7 is preferably 20 mm or greater and 70 mm or less, and more preferably 30 mm or greater and 50 mm or less. In the present embodiment, the upper layer 5 and the lower layer 6 have the same length 71W of the belt-like portion 71.

  The absorbent pad 1 of this embodiment will be further described. As shown in FIGS. 1 and 2, at the left and right side portions along the longitudinal direction X of the main body 15, the skin of the wearer at the time of wearing at least the excretory portion facing portion B. A pair of three-dimensional gathers 20, 20 standing up toward the side is provided. The three-dimensional gather 20 stands up with the main body 15 side as a base end and a free end on the skin side of the wearer, and is connected to the base wall portion 21 and the upper end portion of the base wall portion 21 in the vertical direction. The elastic member 25 is configured to include an elastic stretchable portion 22 that is arranged in an extended state along X.

  In addition to the elastic member 25, the three-dimensional gather 20 is further configured to include one side sheet 26 having a certain width in the longitudinal direction X. The side sheet 26 has a base wall as shown in FIG. The portion 21 and the upper end portion thereof are folded back so as to have a shape in which an elastic stretchable portion 22 is continuously provided. Accordingly, the three-dimensional gather 20 formed by folding the side sheet 26 has a two-layer structure in the base wall portion 21 and the elastic stretchable portion 22 as shown in FIG. The side sheets 26 and 26 constituting the two-layer structure are joined by an adhesive (not shown).

  As shown in FIG. 2, the base wall 21 is joined to the skin facing surface of the main body 15 (the skin facing surface of the topsheet 2) above the absorber 4, and the joint 23 is the base end. And it has the standing part 24 which stands up toward a wearer's skin side at the time of wear by using the elastic elastic part 22 (tip part of the elastic elastic part 22) as the free end. Portions other than the standing portion 24 in the base wall portion 21 are wound down along the side edge along the longitudinal direction X of the absorber 4, and further extend outward in the lateral direction Y from the side edge of the absorber 4. The extension part is joined to the extension part from the side edge of the absorbent body 4 in the back sheet 3 by a known joining means such as an adhesive or heat seal. A joint portion 23 (the base end) between the base wall portion 21 (standing portion 24) and the topsheet 2 (main body 15) is linear in a plan view, and has a substantially total length of the three-dimensional gather 20 along the vertical direction X. It extends over. The joint 23 is formed by applying an adhesive such as a hot melt adhesive. The linear joint portion 23 may be a continuous line in which the adhesive is continuously applied along the longitudinal direction X, or may be a broken line in which the adhesive is applied discontinuously. It can be a straight line or a curved line. The linear joint 23 in the present embodiment is a straight line and a continuous line.

  The elastic stretchable portion 22 is given stretchability by one or more (two in the present embodiment) elastic members 25 extending in the longitudinal direction X being joined and fixed to the side sheet 26 in an extended state. The expansion / contraction direction coincides with the vertical direction X. The elastic expansion / contraction part 22 extends over at least the entire length of the crotch part M in the longitudinal direction X, and in this embodiment, further extends to the front part F and the rear part R near the crotch part M. The elastic member 25 is disposed in an extended state between the two side sheets 26 and 26 constituting the elastic expansion / contraction part 22, and is joined to the side sheets 26 and 26 by an adhesive (not shown).

  As shown in FIG. 1, in the front part F and the rear part R, the elastic stretchable part 22 at the end in the longitudinal direction X of the three-dimensional gather 20 is joined to the main body 15 (surface sheet 2), and its stretchability is obstructed. The three-dimensional gathered non-expandable portion 27 is formed. The absorbent pad 1 has a pair of left and right three-dimensional gathers 20 extending along the longitudinal direction X of the main body 15 joined to the main body 15 at the front and rear ends in the vertical direction X, respectively. By forming 27, it curves between both the non-expandable parts 27 and 27 in a natural state. Due to the contraction of the elastic stretchable part 22, the absorbent pad 1 has its entire shape in the longitudinal direction X curved in a concave shape on the skin facing surface side (surface sheet 2 side) in a natural state.

  Thus, in the present embodiment, when each part of the absorbent pad 1 is extended so that the absorbent pad is expanded in a planar shape as shown in FIG. A certain elastic expansion / contraction part 22 (the tip part of the elastic expansion / contraction part 22) is located outward in the lateral direction Y from the linear part 92 of the groove 9. With such a configuration, as described above, the absorbent body 4 is deformed by the lifting operation of the absorbent pad 1 when the absorbent pad 1 is worn, and a part of the side absorbent body 8 is formed as shown in FIG. When it moves to the non-skin facing surface side of the central absorbent body 7 and overlaps with this, the close contact position between the wearer's excretory part and the arrangement area of the central absorbent body 7 in the absorbent pad 1 is in the lateral direction Y. Even if it is slightly deviated, the three-dimensional gather 20 does not cover the upper part of the central absorbent body 7, and therefore, the disadvantage that the liquid absorbent retention by the central absorbent body 7 is obstructed by the three-dimensional gather 20 is effectively prevented.

  Moreover, in this embodiment, the junction part 23 which is the said base end of the three-dimensional gather 20 follows the longitudinal direction X of the side part absorber 8 of the upper layer 5 in the planar view of the absorptive pad 1 as shown in FIG. It overlaps with the side edge 8s or its vicinity. Further, the joint portion 23 extends in parallel to the linear portion 92 of the groove 9. Here, “the vicinity of the side edge 8 s of the side absorber 8 of the upper layer 5” is a region within 8 mm inward in the lateral direction Y from the side edge 8 s of the side absorber 8 of the upper layer 5. Is part of. With such a configuration, the joint 23 that is the base of the three-dimensional gather 20 can follow the movement of the side absorbent body 8 toward the central absorbent body 7 due to the pulling-up operation when the absorbent pad 1 is worn. At the same time, the elastic expansion / contraction part 22 (the tip part of the elastic expansion / contraction part 22), which is the free end of the three-dimensional gather 20, can surely approach the wearer's ridge part, whereby the elastic expansion / contraction part 22 is Adhesiveness to the ridge portion is increased. Further, the joint 23 of the three-dimensional gather 20 overlaps the side edge 8s of the side absorbent body 8 of the upper layer 5 or the vicinity thereof, so that excretory fluid such as urine is absorbed on the skin facing surface of the absorbent pad 1. Since a possible wide absorption surface can be secured, the absorption performance can be further improved.

  The material for forming each part in the absorbent pad 1 will be described. As the top sheet 2 and the back sheet 3, various kinds of materials conventionally used in the technical field can be used without particular limitation. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. The back sheet 3 may be liquid-impermeable or liquid-permeable, for example, a resin film that does not have moisture permeability, a resin film that has micropores and moisture permeability, and a nonwoven fabric such as a water-repellent nonwoven fabric, A laminate of the sheet and other sheets can be used.

  As the water-absorbing material constituting the upper layer 5 (upper absorbent core 50) and the lower layer 6 (lower absorbent core 60), various materials conventionally used in the technical field can be used without particular limitation, for example, , Natural cellulose fibers such as wood pulp, and fiber materials such as hydrophilic synthetic fibers; water-absorbing polymers having a predetermined shape such as particulates and fibers, and the like. These may be used alone or in combination of two or more. Can be used.

The basis weight of the upper layer 5 (upper layer absorbent core 50) is preferably 150 g / m ² or more, more preferably 200 g / m ² or more, and preferably 600 g / m ² or less, more preferably 500 g / m ² or less. More specifically, it is preferably 150 g / m ² or more and 600 g / m ² or less, and more preferably 200 g / m ² or more and 500 g / m ² or less.
The basis weight of the lower layer 6 (lower layer absorbent core 60) is preferably 150 g / m ² or more, more preferably 200 g / m ² or more, and preferably 700 g / m ² or less, more preferably 600 g / m ² or less. More specifically, it is preferably 150 g / m ² or more and 700 g / m ² or less, more preferably 200 g / m ² or more and 600 g / m ² or less.
The upper layer 5 (upper absorbent core 50) and the upper layer 5 (upper absorbent core 50) may have the same basis weight or different basis weights.

  Further, the upper layer 5 (upper layer absorbent core 50) and the lower layer 6 (lower layer absorbent core 60) may have the same composition or different compositions. In the latter case, the upper layer 5 and the lower layer 6 excrete liquid such as urine. The function for can be different. For example, if the upper absorbent core 50 contains more wood pulp than the water absorbent polymer and the lower absorbent core 60 makes the absorbent polymer contain more wood pulp, The upper layer 5 has an excellent liquid diffusing function, and the lower layer 6 has an excellent liquid holding function. The upper layer 5 can share functions such as mainly liquid diffusion and the lower layer 6 mainly having liquid holding. Furthermore, in such a configuration, if the intermediate sheet 10 interposed between the upper layer 5 and the lower layer 6 is excellent in liquid diffusibility, the liquid diffusibility of the absorbent body 4 as a whole can be further improved. Examples of the intermediate sheet 10 having excellent liquid diffusibility include paper containing 10% by mass or more of hydrophilic fibers that are bulky, such as crosslinked pulp, rayon, and mercerized pulp.

The content mass ratio (fiber material / water absorbent polymer) of the fiber material such as wood pulp and the water absorbent polymer in the upper layer 5 (upper layer absorbent core 50) is preferably 0.75 or more, more preferably 1.0 or more, And preferably it is 5.0 or less, More preferably, it is 3.0 or less, More specifically, Preferably it is 0.75 or more and 5.0 or less, More preferably, it is 1.0 or more and 3.0 or less.
The mass ratio (fiber material / water absorbent polymer) of the fiber material such as wood pulp and the water absorbent polymer in the lower layer 6 (lower layer absorbent core 60) is preferably 0.75 or more, more preferably 1.0 or more. And preferably it is 5.0 or less, More preferably, it is 3.0 or less, More specifically, Preferably it is 0.75 or more and 5.0 or less, More preferably, it is 1.0 or more and 3.0 or less.

As the upper layer core wrap sheet 51, the lower layer core lamp sheet 61, and the intermediate sheet 10, a liquid permeable sheet can be used. For example, paper such as tissue paper, various non-woven fabrics, apertured films, and the like can be used. it can. The basis weight of each sheet 51,61,10 is preferably 10 g / m ² or more, more preferably 12 g / m ² or more, and preferably 20 g / m ² or less, more preferably 18 g / m ² or less, more Specifically, it is preferably 10 g / m ² or more and 20 g / m ² or less, more preferably 12 g / m ² or more and 18 g / m ² or less.

  As the intermediate sheet 10, a sheet having a color different from that of each constituent member (surface sheet 2, upper layer 5, etc.) of the absorbent pad 1 disposed on the skin facing surface side can be used. Different colors may be used. For example, when the intermediate sheet 10 is colored in a different color from the top sheet 2 and the upper layer 5 (upper absorbent core 50 and upper core wrap sheet 51), the absorbent pad 1 is viewed from the top sheet 2 side. If the coloring of the intermediate sheet 10 is made visible through the groove 9, the positioning at the time of wearing becomes easy, and the work burden on the wearer is reduced.

  As the side sheet 26 constituting the three-dimensional gather 20, various types conventionally used in the technical field can be used without particular limitation. For example, a water-repellent nonwoven fabric, a sheet made of a resin film, a nonwoven fabric, and the like A laminate with a resin film or the like can be used. Further, as the elastic member 25 for forming a three-dimensional gather, various members conventionally used in the technical field can be used without particular limitation, and may be a thread shape or a belt shape.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above embodiment, in the upper layer 5, only the skin facing surface of the upper absorbent core 50 is covered by one upper core wrap sheet 51, and in the lower layer 6, the skin facing surface of the lower absorbent core 60 and On the contrary, in the upper layer 5, both the skin facing surface and the non-skin facing surface of the upper absorbent core 50 are coated on both surfaces of the non-skin facing surface. It may be covered with one upper core wrap sheet 51, and in the lower layer 6, only the skin facing surface of the lower absorbent core 60 may be covered with one lower core wrap sheet 61, or both layers 5, 6 In both cases, only the skin facing surface of each absorbent core or both the skin facing surface and the non-skin facing surface may be covered with one core wrap sheet.

  In the embodiment, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 have the same shape and the same size, and the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are completely coincident in plan view. However, instead of such a configuration, the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are similar in shape in plan view, and the groove 9 of the lower layer 6 is compared with the groove 9 of the upper layer 5. Thus, the length and width may be increased. Thus, when the groove 9 of the upper layer 5 and the groove 9 of the lower layer 6 are similar to each other, when the absorbent pad 1 is bent at the groove 9 (overlapping portion 90) and deformed three-dimensionally, the upper layer Between the portions where the grooves 9 of the upper and lower layers 5 and 6 are not formed around the low-rigidity portion where the groove 9 of the lower layer 6 and the groove 9 of the lower layer 6 overlap each other. Since the buffer portion having low rigidity compared to the overlapping portion (high rigidity portion) is formed, the curvature of the bent portion that is formed when the pad 9 is crushed or overlapped when the pad 1 is deformed becomes smooth. The pad 1 becomes easier to follow along the wearer's body, and the uncomfortable feeling is reduced.

  In addition to the embodiment of the present invention described above, the following additional notes (absorbent pads) are disclosed.

<1> A front sheet that forms a skin facing surface, a back sheet that forms a non-skin facing surface, and a main body including an absorbent body interposed between both sheets, and a longitudinal direction corresponding to the wearer's front-rear direction and the longitudinal direction An absorbent pad having a transverse direction orthogonal to
The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And includes a laminated structure composed of an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer,
Each of the upper layer and the lower layer includes a central absorbent body and a pair of side absorbent bodies that are connected to each other at the crotch part or the rear part of the central absorbent body and provided on both sides of the central absorbent body. And having a groove penetrating the layer in the thickness direction between the central absorbent body and each of the pair of side absorbent bodies,
The upper layer groove and the lower layer groove substantially overlap each other in plan view of the absorber, and have a linear portion extending in the longitudinal direction at the crotch portion, and the open end portion and the linear shape Absorbent pad connected to the part.

<1-2> The overlapping part of the groove in the upper layer and the groove in the lower layer, which are substantially overlapped in plan view of the absorber, is open to both side edges along the longitudinal direction of the front part. The absorbent pad according to <1>, wherein the both side edges have open ends.
<1-3> The absorbent pad according to <1> or <1-2>, in which an intermediate sheet is interposed between the upper layer and the lower layer, and each of these layers and the intermediate sheet are joined.

<2> The absorptivity according to any one of <1> to <1-3>, wherein the groove in the upper layer and the groove in the lower layer are completely matched in a plan view of the absorber. pad.
<2-1> The groove in the upper layer and the groove in the lower layer are similar in plan view to each other, and the groove in the lower layer is longer than the groove in the upper layer. The absorbent pad according to any one of <1> to <1-3>, which has a large width.
<3> Due to the lifting operation of the absorbent pad when the absorbent pad is worn, the side absorbers of the upper layer and the lower layer are closer to the open ends than the central absorber of the lower layer. The absorbent pad according to <1> or <2>, wherein the absorbent pad is integrally moved to and overlapped with the non-skin facing surface side.

<4> A pair of three-dimensional gathers that stand up toward the wearer's skin at the time of wearing at least in the crotch portion are provided on the left and right side portions along the longitudinal direction of the main body. And stand up to make a free end on the skin side of the wearer,
When each part of the absorbent pad is extended to expand the absorbent pad in a planar state, the free end of the three-dimensional gather is laterally outward from the linear part of the groove. The absorbent pad according to any one of <1> to <3>, which is positioned.
<5> The base end of the three-dimensional gather overlaps with the side edge or the vicinity thereof along the longitudinal direction of the side absorber of the upper layer in a plan view of the absorbent pad, and the linear portion of the groove The absorbent pad according to any one of <1> to <4>, which is parallel to the surface.
<6> The absorbent pad according to any one of <1> to <5>, wherein a width of the groove is larger than a thickness of the absorbent body under no pressure.

<7> In the absorber under no pressure, the ratio of the groove width to the absorber thickness (groove width / absorber thickness) is preferably 2.0 or more, more preferably 4.0. The absorbent pad according to any one of the above items <1> to <6>.
<8> In the absorber under no pressure, the ratio of the groove width to the absorber thickness (groove width / absorber thickness) is preferably 10.0 or less, more preferably 7.0. The absorbent pad according to any one of <1> to <7>, which is the following.
<9> The absorbent pad according to any one of <1> to <8>, wherein a width of the groove is preferably 5 mm or more, and more preferably 10 mm or more.
<10> The absorbent pad according to any one of <1> to <9>, wherein the width of the groove is preferably 40 mm or less, more preferably 30 mm or less.
<11> The absorbent pad according to any one of <1> to <10>, wherein in each of the upper layer and the lower layer, the width of the groove is constant over the entire length thereof.
<12> The thickness of the absorber under no pressure (the total thickness of the upper layer and the lower layer under no pressure) is preferably 1.0 mm or more, more preferably 2.0 mm or more. <1> ~ Absorbent pad according to any one of <11>.
<13> The thickness of the absorber under no pressure (the total thickness of the upper layer and the lower layer under no pressure) is preferably 10.0 mm or less, more preferably 7.0 mm or less. <1> ~ Absorbent pad according to any one of <12>.

<14> One of the upper layer and the lower layer is described in any one of the above items <1> to <13>, which extends outward in the vertical direction from the vertical end on the front portion side in the other. Absorbent pad.
<15> The absorbent pad according to any one of <1> to <14>, wherein a dimension of the lower layer in plan view is equal to or smaller than the dimension of the upper layer.
<16> The absorbent pad according to any one of <1> to <15>, wherein the upper layer extends outward in the longitudinal direction from a longitudinal end on the front portion side in the lower layer.
<17> The absorbent pad according to <16>, wherein an extension length of the upper layer from a longitudinal end of the lower layer is preferably 20 mm or more, and more preferably 40 mm or more.
<18> The absorbent pad according to <16> or <17>, wherein an extension length of the upper layer from a longitudinal end of the lower layer is preferably 120 mm or less, more preferably 100 mm or less.
<19> The lower layer having a smaller size in plan view than the upper layer is the excretory part facing part, and preferably the peripheral part thereof, more preferably the site closer to the rear part than the excretory part facing part, More preferably, the absorbent pad according to any one of <15> to <18>, wherein the absorbent pad is disposed at a site within 50 mm on the rear side from the excretory part facing part.

<20> The intermediate sheet has a color different from that of the top sheet and the upper layer. When the absorbent pad is viewed from the top sheet side, the color of the intermediate sheet is visible through the groove. The absorbent pad according to any one of <1> to <19>, which is made.
<21> In the central absorbent body of each of the upper layer and the lower layer, the length in the lateral direction between the pair of the side absorbent bodies is 20 mm or more, preferably 30 mm or more. The absorbent pad as described in any one of <20>.
<22> The horizontal length of the portion sandwiched between the pair of side absorbers in the central absorber of each of the upper layer and the lower layer is 70 mm or less, preferably 50 mm or less. The absorbent pad as described in any one of <21>.

<23> The upper layer includes an upper absorbent core mainly composed of a water-absorbing material, and one upper core wrap sheet that covers at least the entire area of the skin-facing surface of the upper absorbent core. ,
The lower layer is configured to include a lower absorbent core mainly composed of a water-absorbing material, and one lower core wrap sheet that covers at least the entire skin-facing surface of the lower absorbent core. 1><22> An absorptive pad given in any 1 paragraph.
<24> The skin facing surface of the upper absorbent core and the upper core wrap sheet are joined by an adhesive,
The absorbent pad according to <23>, wherein both the skin facing surface and the non-skin facing surface of the lower absorbent core and the lower core wrap sheet are bonded together with an adhesive.
<25> The lateral length of the upper core wrap sheet is substantially the same as or wider than the crotch part in the upper absorbent core,
The lateral length of the lower core wrap sheet is not less than 2 times and not more than 3 times the maximum width of the longest lateral portion of the lower absorbent core. The absorbent pad according to <23> or <24>, wherein the entire area of the skin facing surface of the lower layer absorbent core and the non-skin facing surface on the opposite side thereof are covered with a core wrap sheet.
<26> The one intermediate sheet is bonded to each of the upper absorbent core and the lower core wrap sheet by an adhesive,
The absorbent pad according to any one of <23> to <25>, wherein the upper layer and the lower layer are integrated via the intermediate sheet.
<27> In the intermediate sheet, the length in the vertical direction and the length in the horizontal direction of the intermediate sheet are substantially the same as the length in the vertical direction and the length in the horizontal direction of the upper-layer core wrap sheet. ~ Absorbent pad according to any one of <27>.

<28> The central absorbent body of each of the upper layer and the lower layer is substantially omitted in a plan view in which a lateral length gradually decreases from the front part toward the crotch part in a region extending from the front part to the crotch part. It has an isosceles trapezoidal part and a planar band part having a constant width, and the band part is connected to a relatively short part of the isosceles trapezoidal part so that both parts are integrally formed. The absorbent pad according to any one of <1> to <27>.
<29> A pair of the side absorbers of each of the upper layer and the lower layer is arranged so that the central absorber is along the side edges along the vertical direction of the isosceles trapezoidal portion and the belt-like portion of the central absorber. The absorption according to <28>, wherein the side absorber and the central absorber are integrally formed by being connected to the central absorber at the crotch portion. Sex pad.
<30> The groove according to any one of <1> to <29>, wherein the groove is formed only in the front portion and the crotch portion in the absorber, and is not formed in the rear portion. Absorbent pad.
<31> The upper layer (the upper absorbent core) contains more wood pulp than the water absorbent polymer, and the lower layer (the lower absorbent core) contains more water absorbent polymer than the wood pulp. The absorbent pad according to any one of <1> to <30>.

<32> The absorber has a constricted portion having a shorter length in the lateral direction than the longitudinal direction on the front side in the longitudinal direction from the rear portion, and on the side edge along the longitudinal direction of the constricted portion, A linear side edge extending along the longitudinal direction and a bent side edge extending longitudinally forward and laterally outward from the longitudinal front end of the linear side edge, on or on an extension of the bent side edge Any one of <1> to <31>, wherein a bent portion of the groove extends in the vicinity from the front end in the vertical direction of the linear portion toward the front in the vertical direction and outward in the horizontal direction. Absorbent pad.
<33> The absorbent pad according to any one of <1> to <32>, wherein the absorbent pad is used by being disposed on a skin facing surface side of a separate absorbent article.
<34> The absorbent article includes a liquid-permeable surface sheet that forms a skin facing surface, a liquid-impermeable back sheet that forms a non-skin facing surface, and an absorbent body interposed between both sheets. And
A pair of three-dimensional gathers having elastic members are provided on both sides along the longitudinal direction of the skin facing surface side,
The absorbent pad according to <33>, wherein a pair of leg flap portions having an elastic member is provided laterally outward of the absorbent body (combination of absorbent pad and absorbent article).
<35> The absorbent pad is mounted on the wearer's body by being pulled up from the crotch of the wearer to the abdomen in a state of being disposed on the skin-facing surface side of the absorbent article. The absorbent pad according to <33> or <34>, in which the absorbent article is pulled up after the attachment of (a method of attaching a combination of the absorbent pad and the absorbent article).

DESCRIPTION OF SYMBOLS 1 Absorbent pad 2 Top sheet 3 Back sheet 4 Absorber 5 Upper layer 50 Upper layer absorbent core 51 Upper layer core wrap sheet 6 Lower layer 60 Lower layer absorbent core 61 Lower layer core wrap sheet 7 Central absorber 8 Side part absorber 9 Groove 91 Opening End portion 92 Linear portion 94 Bending portion 10 Intermediate sheet 15 Main body 20 Solid gather 21 Base wall portion 22 Elastic stretchable portion 23 Joint portion (base end of solid gather)
24 standing portion 25 elastic member for forming three-dimensional gathers 26 side seat F front portion M crotch portion R rear portion X longitudinal direction Y lateral direction

Claims (8)

A body comprising a top sheet that forms a skin facing surface, a back sheet that forms a non-skin facing surface, and an absorbent body interposed between the two sheets, and perpendicular to the longitudinal direction corresponding to the wearer's longitudinal direction An absorbent pad having a transverse direction,
The absorbent body is disposed on the crotch part that is disposed opposite to the crotch of the wearer when worn, a front part that is disposed on the abdomen side of the wearer from the crotch part, and a back side of the wearer than the crotch part. And includes a laminated structure composed of an upper layer and a lower layer disposed on the non-skin facing surface side of the upper layer,
An intermediate sheet is interposed between the upper layer and the lower layer, and each of these layers and the intermediate sheet are joined,
Each of the upper layer and the lower layer includes a central absorbent body and a pair of side absorbent bodies that are connected to each other at the crotch part or the rear part of the central absorbent body and provided on both sides of the central absorbent body. And having a groove penetrating the layer in the thickness direction between the central absorbent body and each of the pair of side absorbent bodies,
The groove in the upper layer and the groove in the lower layer substantially overlap each other in plan view of the absorber, and the overlapping portion of both grooves is open to both side edges along the longitudinal direction of the front portion. An absorbent pad having open ends at both side edges and a linear portion extending in the longitudinal direction at the crotch portion, and the open end and the linear portion being connected. A pair of three-dimensional gathers that stand toward the wearer's skin when worn at least in the crotch portion are provided on both left and right side portions along the longitudinal direction of the main body, and the three-dimensional gathers are based on the main body side. It stands up to make a free end on the skin side of the wearer,
When each part of the absorbent pad is extended to expand the absorbent pad in a planar state, the free end of the three-dimensional gather is laterally outward from the linear part of the groove. The absorbent pad of claim 1 being located.   The base end of the three-dimensional gather overlaps with a side edge along the longitudinal direction of the side absorber of the upper layer or the vicinity thereof in a plan view of the absorbent pad, and with respect to the linear portion of the groove The absorbent pad according to claim 1 or 2, which is parallel.   The absorbent pad according to any one of claims 1 to 3, wherein a width of the groove is larger than a thickness of the absorber under no pressure.   5. The absorbent pad according to claim 1, wherein one of the upper layer and the lower layer extends outward in the vertical direction from the vertical end on the front portion side in the other.   The absorbent pad according to any one of claims 1 to 5, wherein a dimension of the lower layer in plan view is equal to or smaller than the dimension of the upper layer.   The intermediate sheet has a color different from that of the top sheet and the upper layer, and when the absorbent pad is viewed from the top sheet side, the color of the intermediate sheet is visible through the groove. The absorptive pad according to any one of claims 1 to 6.   Due to the lifting operation of the absorbent pad when the absorbent pad is worn, the portion close to the open end in the side absorbent body of each of the upper layer and the lower layer is non-skin of the central absorbent body of the lower layer The absorptive pad according to any one of claims 1 to 7, wherein the absorbent pad is integrally moved to the opposite surface side so as to overlap therewith.

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