JP2011125537A - Disposable absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorbent article which is excellent in diffusivity of excreted liquid, can effectively absorb the excreted liquid, and can prevent the excreted liquid from returning to the skin of a wearer. <P>SOLUTION: The disposable absorbent article has a front surface sheet 3, a rear surface sheet 4, and an absorbent article body 2 having an absorbent body 5 located between the upper surface sheet 3 and the rear surface sheet 4. The absorbent article body 2 has a front side part 6, a central part 7, and a rear side part 8 in this order along a longitudinal direction. An absorbent body 5 has an upper layer absorbent body 11 located in the front face sheet 3 side and a lower layer absorbent body 12 located in the rear face sheet 4 side. An upper layer opening hole part 13 is arranged along the longitudinal direction of the upper layer absorbent body 11. A lower layer groove part 14 is arranged along the longitudinal direction of the lower layer absorbent body 12. Further, the absorbent body 5 has an absorbent body concave part 15 formed by overlapping the upper layer opening hole part 13 and a part of the lower layer groove part 14 and a liquid permeating part 16 formed by overlapping the part other than the upper layer opening hole part 13 of the upper layer absorbent body 11 and a part of the lower layer groove part 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disposable absorbent article for children, adults or incontinence.

  Conventionally, in a disposable absorbent article that absorbs excretory fluid such as urine, excretory fluid that has permeated through a liquid-permeable surface sheet located on the front side is absorbed by the absorber, and the liquid-impermeable back side located on the back side The sheet prevents leakage of discharged liquid from the back side.

  In such a disposable absorbent article, the absorbent body is used to improve the absorptive power by effectively diffusing the excretory liquid absorbed by the absorbent body and effectively utilizing the entire absorbent body, thereby preventing leakage of the disposed liquid. Has an upper layer absorber positioned on the top sheet side, a lower layer absorber positioned on the back sheet side, and a liquid diffusable sheet disposed between the upper layer absorber and the lower layer absorber, The upper absorbent body is formed with an opening along the longitudinal direction at a position displaced to either one end or the other end in the longitudinal direction. In this opening, the top sheet and the liquid diffusible sheet are joined. Such a configuration is known (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2006-167196 (pages 3-4 and 7-8, FIG. 3)

  However, in the configuration of Patent Document 1 described above, although the excretory liquid is diffused by the opening of the upper-layer absorber and the liquid diffusive sheet, the lower-layer absorber cannot sufficiently diffuse the excretion liquid, and the excretion liquid is efficiently diffused. It may be impossible to absorb. In addition, since the excretory fluid is easily diffused by the upper layer absorber, when the amount of the excretory fluid is larger than the assumed amount of absorption of the upper layer absorber, the excretion fluid is spread over the skin of the wearer over a wide range of the upper layer absorber. There is a case where it goes back to.

  DISCLOSURE OF THE INVENTION The present invention has been made in view of such points, and a disposable absorbent article that has good diffusibility of excretory fluid and can efficiently absorb excretory fluid, and can prevent the excretory fluid from returning to the wearer's skin. The purpose is to provide.

  The disposable absorbent article according to claim 1 has an absorptive material having a top sheet located on the front side, a back sheet located on the back side, and an absorber located between the top sheet and the back sheet. An article main body is provided, and the absorber is located on the top sheet side and is provided with an upper layer opening provided with an upper layer opening, and is located on the back sheet side, and at least a part of the upper layer opening is provided. It has a lower layer absorber provided with an overlapped lower layer groove part, the upper layer opening part and the lower layer groove part are overlapped to form an absorber concave part, and the part other than the upper layer opening part of the upper layer absorber and the above A liquid passing portion is formed by overlapping the lower groove portion.

  The disposable absorbent article according to claim 2 is the disposable absorbent article according to claim 1, wherein the absorbent article main body is disposed on the front side portion disposed on the front side of the wearer and on the inseam of the wearer. And a rear side portion disposed on the rear side of the wearer in order along the longitudinal direction. The absorbent body has a width in the center portion that is the width in the front side portion and the rear side portion. The upper layer opening is located at the center in the width direction of the upper absorber, and is provided from at least the front side to the center along the longitudinal direction of the upper absorber. And located at the center in the width direction of the lower layer absorber, and provided at least from the center to the rear side along the longitudinal direction of the lower layer absorber, and the absorber recess is formed at least in the center. Part at least in the above And it is formed over the back side from the part.

  The disposable absorbent article according to claim 3 is the disposable absorbent article according to claim 1 or 2, wherein the upper layer opening portion is formed such that the length in the width direction is longer than the length in the width direction of the lower layer groove portion. The lower layer groove portion is located on the inner side from both end portions in the longitudinal direction of the lower layer absorber.

  The disposable absorbent article according to claim 4 is the disposable absorbent article according to any one of claims 1 to 3, wherein the absorbent has a liquid passing portion between the upper layer absorbent body and the lower layer absorbent body. A liquid permeable upper and lower layer separation sheet is provided.

  According to the invention described in claim 1, the upper layer opening is provided in the upper layer absorber, the lower layer groove is provided in the lower layer absorber, and the absorber recess and liquid passing portion are formed. Exhaust fluid is diffused by the upper layer absorbent through the upper layer opening, moves through the absorber recess from the upper layer opening to the lower layer groove, flows into the liquid passage, and is absorbed by the lower layer through this liquid passage. Since it is diffused by the body, the diffusibility of the excretory fluid can be improved and the excretory fluid can be absorbed efficiently.

  In addition, since the absorbent body is formed with the absorbent body recess and the liquid passage portion, the excretory liquid is easily diffused in the lower absorbent body, and therefore the lower layer absorbent body can easily absorb the excreted liquid, and the excretory liquid wearer Can prevent the skin from returning to the skin.

  According to the second aspect of the present invention, the upper layer opening is located at the center in the width direction of the upper layer absorber, and is provided at least from the front side portion to the center portion, so that the upper layer opening portion is provided by the wearer. Corresponding to the urination site, the excretion fluid easily flows into the upper layer opening, and the lower layer groove is located at the center in the width direction of the lower layer absorber, and is provided at least from the center to the rear side. Since the part is formed at least from the central part to the rear side part and the excretion liquid is easily diffused to the rear side part of the lower layer absorber, the diffusibility of the excretion liquid can be improved and the excretion liquid can be efficiently absorbed.

  Further, the absorbent body is formed such that the length in the width direction at the center portion is shorter than the length in the width direction at the front side portion and the rear side portion, so that the absorber is not easily deformed when worn, so that the upper layer opening Part, lower layer groove part, absorber concave part and liquid passing part can be prevented from being crushed, and a decrease in diffusibility when attached can be prevented.

  According to the invention described in claim 3, since the length in the width direction of the upper layer opening is formed longer than the length in the width direction of the lower layer groove, the excretion fluid easily flows into the upper layer opening. The absorber can diffuse the excretory fluid more reliably.

  Moreover, since the lower layer groove part is located inside the longitudinal direction both ends of the lower layer absorbent body, it is possible to prevent the excretory liquid diffusing through the liquid passing part from flowing out from the longitudinal end part of the lower layer absorbent body. .

  According to the invention described in claim 4, since the upper and lower layer separation sheets are provided between the upper layer absorber and the lower layer absorber, the upper layer absorber and the lower layer absorber can be separated. It is possible to prevent the body from entering the lower layer groove portion and crushing the absorber concave portion and the liquid passing portion.

It is a top view which notches and shows a part of disposable absorbent article in the 1st Embodiment of this invention. Sectional drawing along the width direction of a disposable absorbent article same as the above is shown, (a) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of FIG. 1, (c) is (c). It is CC sectional drawing of FIG. Sectional drawing along the longitudinal direction of a disposable absorbent article same as the above is shown, (a) is DD sectional drawing of FIG. 1, (b) is EE sectional drawing of FIG. 1, (c) is It is FF sectional drawing of FIG. (A) And (b) is sectional drawing of the disposable absorbent article of the 2nd Embodiment of this invention. (A) And (b) is sectional drawing of the disposable absorbent article of the 3rd Embodiment of this invention. (A) And (b) is sectional drawing of a disposable absorbent article same as the above. It is sectional drawing of the disposable absorbent article of the 4th Embodiment of this invention. (A) thru | or (c) is a top view of the disposable absorbent article of the 5th Embodiment of this invention. It is a top view which notches and shows a part of disposable absorbent article of the 6th Embodiment of this invention. It is sectional drawing of a disposable absorbent article same as the above, and is GG sectional drawing of FIG. It is sectional drawing of the disposable absorbent article of the 7th Embodiment of this invention.

  Hereinafter, the configuration of the first exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

  In FIG. 1, reference numeral 1 denotes a disposable absorbent article, and the disposable absorbent article 1 includes a substantially rectangular absorbent article body 2.

  The absorbent article body 2 includes a top sheet 3 positioned on the wearer side, which is the front side when the disposable absorbent article 1 is worn, and a clothing side opposite to the wearer, which is the back side when worn. And the absorbent body 5 positioned between the top sheet 3 and the back sheet 4.

  Moreover, the absorbent article main body 2 includes a front side portion 6 that is disposed on the abdomen that is the front side of the wearer in the mounted state, a central portion 7 that is disposed on the inseam of the wearer in the mounted state, and a wearer in the mounted state. The rear side part 8 arrange | positioned at the back side which is a back side is provided in order along the longitudinal direction.

  The top sheet 3 is a substantially rectangular liquid-permeable sheet that can transmit liquid excretion liquid such as urine, for example, and the back sheet 4 is a liquid-impermeable (hydrophobic) sheet that does not allow excretion liquid to permeate. Thus, the top sheet 3 and the back sheet 4 are appropriately formed of a sheet material such as a woven fabric, a nonwoven fabric, a film, and a synthetic fiber.

  In addition, the top sheet 3 and the back sheet 4 are joined to each other with, for example, an adhesive so that the absorbent body 5 is sealed so that the absorbent body 5 is sandwiched between them. And is absorbed by the absorbent body 5, and the back sheet 4 prevents leakage of excretory fluid from the absorbent body 5 to the back surface side.

  The absorber 5 includes an upper layer absorber 11 located on the top sheet 3 side and a lower layer absorber 12 located on the back sheet 4 side. The upper layer absorbent body 11 and the lower layer absorbent body 12 are formed of absorbent fibers such as pulp and polymer absorbent material, for example, or are made of crepe paper such as tissue for shape retention or absorption diffusion of the absorbent body 5. It is formed with a gap between them and can fully absorb the excretory fluid.

  The lower layer absorbent body 12 has a length in the width direction at the center portion 7 of the absorbent article body 2 shorter than the length in the width direction of the front side portion 6 and the rear side portion 8, and the center portion 7 is notched in an arc concave shape in the width direction. It is formed in a substantially hourglass shape. In addition, the length in the width direction of the lower layer absorbent body 12 is shorter than the length in the width direction of the top sheet 3 and the back sheet 4, and the length in the longitudinal direction of the lower layer absorbent body 12 is the top sheet 3 and the back sheet 4. It is formed shorter than the length in the longitudinal direction.

  The upper layer absorbent body 11 has a substantially rectangular shape, the length in the longitudinal direction is substantially the same as the length in the longitudinal direction of the lower layer absorbent body 12, and the length in the width direction is the width of the lower layer absorbent body 12 in the central portion 7. It is shorter than the length in the direction.

  And the upper layer absorber 11 is arrange | positioned in the center of the width direction of the lower layer absorber 12, and the absorber 5 is comprised. That is, the absorbent body 5 has a substantially hourglass shape in which the length in the width direction at the central portion 7 of the absorbent article body 2 is shorter than the length in the width direction of the front side portion 6 and the rear side portion 8. 3 and the back sheet 4 are arranged at substantially the center.

  Here, as shown in FIG. 1 and FIGS. 2A to 2C, the upper absorbent body 11 is provided with an upper layer opening portion 13, and the lower layer absorbent body 12 has a part in the upper layer opening portion 13. Overlapping lower layer grooves 14 are provided.

  The upper layer opening 13 has a substantially rectangular shape in plan view, and is longer than the lower layer groove 14 in the width direction. Further, the upper layer opening 13 is formed in the central portion 7 from the longitudinal end of the upper absorbent body 11 in the front side portion 6 along the longitudinal direction of the upper absorbent body 11 at the approximate center in the width direction of the upper absorbent body 11. The upper layer absorbent body 11 is provided at a position corresponding to the urination site of the wearer over substantially the center in the longitudinal direction. Further, the upper layer opening 13 is provided penetrating in the cross-sectional direction from the top sheet 3 side of the upper layer absorber 11 to the lower layer absorber 12 side. In addition, as shown in FIG.2 (c), the upper layer opening part 13 is not provided in the rear side part 8. As shown in FIG.

  The lower groove portion 14 has a substantially rectangular shape in plan view whose length in the width direction is shorter than that of the upper layer opening portion 13, and is substantially in the center in the width direction of the lower layer absorber 12, along the longitudinal direction of the lower layer absorber 12. It is provided at a position corresponding to the back side from the crotch of the wearer over a portion slightly inside the longitudinal direction end of the lower layer absorbent body 12 from the portion 7 to the rear side portion 8. Further, the lower layer groove portion 14 is provided so as to penetrate in the cross-sectional direction from the upper layer absorber 11 side of the lower layer absorber 12 to the back sheet 4 side. As shown in FIG. 2A, the lower layer groove portion 14 is not provided in the front side portion 6.

  As shown in FIG. 3A, in the center of the absorbent body 5 in the width direction, the upper layer opening 13 is located from the front side 6 to the center 7 and the lower layer groove 14 is from the center 7 to the rear side 8. positioned. In addition, the lower layer absorber 12 is located at the end on the rear side of the lower layer groove portion 14, and the lower layer absorber 12 and a part of the upper layer absorber 11 overlap each other. That is, at the center in the width direction of the absorbent body 5, the upper layer absorbent body 11 and the lower layer absorbent body 12 overlap only at the end portion of the rear side portion 8.

  An absorber recess 15 that communicates with the upper layer opening portion 13 and a liquid passage portion 16 that communicates with the absorber recess 15 are provided at substantially the center in the width direction of the absorber 5.

  The absorber concave portion 15 is located in the central portion 7 and is formed by overlapping the longitudinal central portion 7 side of the upper layer opening portion 13 and the longitudinal central portion 7 side of the lower layer groove portion 14. Further, as shown in FIG. 2 (b), the absorber recess 15 includes an inner surface of the upper layer absorber 11 corresponding to the upper layer opening 13 and an upper layer absorption of the lower layer absorber 12 corresponding to the upper layer opening 13. The cross-sectional direction of the absorbent body 5 by the body 11 side, that is, the upper side surface, the inner side surface of the lower layer absorbent body 12 corresponding to the lower layer groove portion 14, and the lower layer absorbent body 12 side, that is, the upper side surface of the back sheet 4 corresponding to the lower layer groove portion 14. It is formed in a concave shape.

  The liquid passing part 16 is located slightly from the center of the central part 7 to the inner side of the lower absorbent body 12 on the rear side part 8 side, and on the rear side part 8 side from the upper layer opening part 13 in the upper absorbent body 11. A non-opening part other than the upper layer opening part 13 and the lower layer groove part 14 are formed to overlap each other. Further, as shown in FIG. 2 (c), the liquid passing part 16 includes the lower absorbent body 12 side, that is, the lower side surface of the upper absorbent body 11 corresponding to the lower groove part 14, and the lower absorbent body 12 corresponding to the lower groove part 14. It is formed in a tunnel shape by the inner side surface and the lower surface absorbent body 12 side, that is, the upper side surface of the back sheet 4 corresponding to the lower layer groove portion 14.

  As shown in FIG. 3 (b), the upper layer absorbent body 11 outside the center in the width direction of the absorbent body 5 is disposed, and in the portion where the upper layer opening 13 is not provided, the length of the absorbent body 5 is increased. The upper layer absorber 11 and the lower layer absorber 12 overlap over the whole area in the direction.

  Moreover, as shown in FIG.3 (c), it is a little outside from the center of the width direction of the absorber 5, and between the part shown in FIG.3 (a), and the part shown in FIG.3 (b), An upper layer opening portion 13 is provided from the front side portion 6 to the central portion 7, and the upper layer absorber 11 and the lower layer absorber 12 overlap each other on the rear side portion 8 side from the upper layer opening portion 13.

  Next, the operation of the first embodiment will be described.

  When the disposable absorbent article 1 is worn, the top sheet 3 of the absorbent article body 2 is on the inside, that is, the wearer side, the back sheet 4 of the absorbent article body 2 is on the outside, and the front side portion 6 is the wearer. It is disposed on the inner surface of a pants-type absorbent article such as a diaper so that the central part 7 is located on the inseam of the wearer and the rear part 8 is located on the back side, Wear a pants-type absorbent article.

  In the wearing state of the disposable absorbent article 1, the front side portion 6 is located on the abdomen side of the wearer, so the upper layer opening 13 of the absorbent body 5 corresponds to the urination site of the wearer.

  Therefore, the excretion fluid excreted by the wearer passes through the top sheet 3 and flows into the upper layer opening 13, and passes through the upper layer opening 13 from the front side 6 of the absorbent article body 2 to the center 7. While being moved toward, it is absorbed by the upper-layer absorber 11. That is, the diffusion of excretory fluid in the upper layer absorbent 11 is promoted in the upper layer opening 13.

  Further, the excretory fluid that moves through the upper layer opening 13 moves to the lower layer groove 14 through the absorber recess 15 communicated with the upper layer opening 13, and flows into the liquid passing part 16.

  The excretory fluid that has flowed into the liquid passing portion 16 is absorbed by the lower layer absorbent body 12 while moving from the central portion 7 of the absorbent article body 2 toward the rear side portion 8 through the liquid passing portion 16. That is, the diffusion of excretory fluid in the lower layer absorber 12 is promoted in the fluid passing portion 16.

  As described above, in the disposable absorbent article 1, the upper layer absorbent body 11 is provided with the upper layer opening part 13, the lower layer absorbent body 12 is provided with the lower layer groove part 14, and the absorbent body recessed part 15 and the liquid passing part 16 are formed. As a result, the excretory fluid absorbed by the absorber 5 is diffused in the upper layer absorber 11 through the upper layer opening 13, and moves from the upper layer opening 13 to the lower layer groove 14 through the absorber recess 15. Then, it flows into the liquid passing part 16 and is diffused by the lower layer absorbent 12 through the liquid passing part 16, so that the diffusibility of the excretory liquid can be improved. Therefore, the absorbent body 5 can easily absorb the excretory liquid because the excretory liquid is easily diffused, and can sufficiently absorb the excretory liquid and prevent the excretion liquid from leaking out.

  Further, since the absorbent recess 15 and the liquid passing portion 16 are formed, the excretory liquid can be easily diffused in the lower layer absorbent 12, so that the lower layer absorbent 12 can sufficiently absorb the excreted liquid. Therefore, it is possible to reduce the amount of excretory fluid absorbed by the upper layer absorber 11 positioned above the liquid passing portion 16, and to prevent the absorbed excretory fluid from returning to the wearer's skin. Accordingly, it is possible to prevent the wearing feeling from deteriorating due to the return of the excretory fluid.

  The upper layer opening 13 is located at the center in the width direction of the upper layer absorbent body 11 and is provided from the front side 6 to the center 7 in the absorbent article body 2, so that the upper layer opening 13 is more reliably attached to the wearer. Corresponding to the urination site, the excretion fluid easily flows into the upper layer opening 13. Further, the lower layer groove portion 14 is located in the center of the lower layer absorbent body 12 in the width direction and is provided from the central portion 7 to the rear side portion 8 in the absorbent article main body 2, so that the liquid passing portion 16 is formed on the rear side portion 8. The formed excretory liquid is easily diffused to the rear side portion 8 of the lower layer absorbent body 12. Therefore, the diffusibility of the excretory fluid in the absorber 5 can be improved, and the excretory fluid can be efficiently absorbed.

  Here, in the wearing state, the center portion 7 of the absorbent article body 2 is located in the crotch of the wearer, so that both legs of the wearer are located on both sides of the center portion 7. That is, in the mounted state, the center portion 7 is easily subjected to the force inward in the width direction by both legs, and the absorber 5 is easily deformed inward in the width direction when the width of the absorber 5 in the center portion 7 is wide. When the absorber 5 is deformed, the upper layer opening portion 13, the lower layer groove portion 14, the absorber recess portion 15 and the liquid passing portion 16 are crushed. In particular, in the configuration in which the upper layer opening portion 13 is provided in the center in the width direction of the upper layer absorber 11, and the lower layer groove portion 14 is provided in the center in the width direction of the lower layer absorber 12, the upper layer opening portion 13, the lower layer groove portion 14, the absorption The body concave portion 15 and the liquid passing portion 16 are liable to be crushed.

  Therefore, when the absorbent body 5 is mounted with the disposable absorbent article 1 by forming the length in the width direction in the central portion 7 shorter than the length in the width direction in the front side portion 6 and the rear side portion 8, In the central portion 7, the absorbent body 5 is easily adapted around the legs of the wearer, and the absorbent body 5 is not easily subjected to a force inward in the width direction. Therefore, in the mounted state, it is possible to prevent the upper layer opening portion 13, the lower layer groove portion 14, the absorber concave portion 15 and the liquid passing portion 16 from being crushed, and to prevent a decrease in diffusibility when being mounted.

  In particular, in the central portion 7, the absorbent body 5 is formed in an arc concave shape inward in the width direction, so that the absorbent body 5 can be easily adapted around the legs of the wearer and the absorbent body 5 can be hardly deformed in the worn state. .

  In addition, since the area of the absorber 5 in the front side part 6 and the rear side part 8 can be ensured large by shortening only the length of the width direction of the absorber 5 in the center part 7, reduction of the area of the absorber 5 is possible. It can be suppressed to the minimum, and the absorbent capacity of the absorbent body 5 can be sufficiently secured.

  The upper layer opening portion 13 is formed so that the length in the width direction is longer than the length in the width direction of the lower layer groove portion 14, so that excretion fluid excreted from the wearer easily flows into the upper layer opening portion 13. The body 5 can diffuse the excretory liquid more reliably at the upper layer opening part 13, the lower layer groove part 14, the absorber concave part 15, and the liquid passing part 16.

  Further, by shortening the length of the lower layer groove portion 14 in the width direction, the excretory fluid can easily move to the back side of the rear side portion 8 through the fluid passing portion 16, and the excretory fluid can be more reliably diffused.

  Since the lower layer groove portion 14 is located on the inner side from both longitudinal end portions of the lower layer absorbent body 12, the excretory fluid that diffuses through the liquid passing portion 16 flows out from the longitudinal end portion of the lower layer absorbent body 12. Thus, leakage from the absorbent article body 2 can be prevented.

  In the first embodiment, the disposable absorbent article 1 is used by being disposed on the inner surface side of the pant-type absorbent article. However, the present invention is not limited to such a configuration. The above configuration can also be applied to a mold.

  Moreover, although the absorbent article main body 2 was set as the structure which has the front side part 6, the center part 7, and the rear side part 8, it is not limited to such a structure, The front side part 6, the center part 7, and the rear side part 8 May be configured so that is not particularly set.

  The absorbent body 5 has a configuration in which the length in the width direction in the central portion 7 is shorter than the length in the width direction in the front side portion 6 and the rear side portion 8, but is not limited to such a configuration. The length in the width direction of the absorbent body 5 at the central portion 7 and the rear side portion 8 can be set as appropriate. Moreover, when making the length of the width direction of the absorber 5 in the center part 7 shorter than the length of the width direction in the front side part 6 and the rear side part 8, the shape of the absorber 5 is limited to an hourglass shape. It can be designed as appropriate. Further, the shape and size of the upper layer absorber 11 and the lower layer absorber 12 are not limited to different configurations, and the shape and size of the upper layer absorber 11 and the lower layer absorber 12 can be set as appropriate, for example, the upper layer absorber 11 and The lower layer absorber 12 may have the same shape.

  The absorber 5 is not limited to a configuration in which the upper layer opening portion 13 and the lower layer groove portion 14 are partially overlapped, and may be any configuration as long as the upper layer opening portion 13 and the lower layer groove portion 14 are at least partially overlapped. .

  The upper layer opening portion 13 is not limited to the configuration located in the center in the width direction of the upper layer absorber 11, and is not limited to the configuration provided from the front side portion 6 to the center portion 7, and the upper layer opening portion 13 is not limited. The position for providing can be set as appropriate.

  The upper layer opening 13 is not limited to a substantially rectangular shape in plan view. For example, the upper layer opening 13 has a configuration in which the length in the width direction is sequentially shortened from the front side 6 side toward the center 7 side. It can be formed as appropriate.

  Furthermore, the length of the upper layer opening 13 in the width direction is not limited to the configuration longer than the length of the lower layer groove 14 in the width direction, and the sizes of the upper layer opening 13 and the lower layer groove 14 can be set as appropriate.

  Although the lower layer groove portion 14 is configured to be provided from the center portion 7 to the rear side portion 8, the present invention is not limited to such a configuration, and the position where the lower layer groove portion 14 is provided can be set as appropriate. A configuration provided from the portion 6 to the rear side portion 8 may be adopted. By adopting such a configuration, the excretion liquid easily flows from the upper layer opening portion 13 into the lower layer groove portion 14, and the excretion solution easily diffuses into the liquid passage portion 16.

  In addition, the lower layer groove portion 14 is not limited to the configuration provided inside the both ends in the longitudinal direction of the lower layer absorbent body 12, for example, the lower end absorbent body in the rear side portion 8 is the longitudinal end portion of the lower layer groove portion 14. A configuration may be provided in which up to 12 longitudinal ends are provided.

  The absorbent article main body 2 only needs to be provided with the absorbent body 5 between the top sheet 3 and the back sheet 4. In the first embodiment, for example, as shown in FIGS. 4 (a) and 4 (b). As in the second embodiment, the surface sheet 3 is arranged so as to correspond to the irregularities of the upper layer absorber 11 and the lower layer absorber 12, that is, the surface sheet 3 has the upper layer opening 13 and the lower layer. A configuration may be adopted in which the absorbent body 5 is recessed along the inside of the groove portion 14 in the cross-sectional direction.

  As described above, by disposing the topsheet 3 corresponding to the unevenness of the upper layer opening 13 and the lower layer groove 14, it is possible to prevent displacement of the absorbent body 5 in the absorbent article body 2.

  4A is a portion equivalent to the AA cross section of FIG. 1 in the first embodiment, and FIG. 4B is a cross section of FIG. 1 BB in the first embodiment. It is a part equivalent to the cross section.

  Further, the absorbent body 5 is provided with the upper crepe paper 21 and the lower crepe paper 22 as in the third embodiment shown in FIGS. 5 (a) and 5 (b) and FIGS. 6 (a) and 6 (b). It may be configured.

  5 (a) and 5 (b), an upper crepe paper 22 is provided between the top sheet 3 and the upper absorbent body 11, and a lower crepe paper is provided between the upper absorbent body 11 and the lower absorbent body 12. 22 is provided. When the upper crepe paper 21 is provided as described above, as shown in FIG. 5A, the upper crepe paper 21 is not provided on the upper side of the upper layer opening 13 on the surface sheet 3 side, and FIG. As shown in (b), any structure in which the upper layer crepe paper 21 is also provided on the upper layer opening portion 13 may be used.

  6A and 6B, a lower layer crepe paper 22 is provided between the upper layer absorber 11 and the lower layer absorber 12. In the configuration shown in FIGS. When the lower crepe paper 22 is provided in this way, as shown in FIG. 6A, the lower crepe paper 22 is not provided on the upper portion of the lower groove portion 14 on the upper absorber 11 side, and FIG. As shown in b), any of the configurations in which the lower layer crepe paper 22 is provided also on the upper portion of the lower layer groove portion 14 may be used.

  Thus, by providing the upper layer crepe paper 21 and the lower layer crepe paper 22, the shape retention of the upper layer absorber 11 and the lower layer absorber 12 can be improved.

  The lower layer absorber 12 is not limited to the configuration in which the lower layer groove portion 14 is formed through the lower layer absorber 12 in the cross-sectional direction. As in the fourth embodiment shown in FIG. The lower absorbent body 12 may not be penetrated and may be formed in a concave shape in the cross-sectional direction.

  Further, the lower layer absorbent body 12 is not limited to the configuration in which only one lower layer groove portion 14 is provided, and a plurality of lower layer groove portions are provided as in the fifth embodiment shown in FIGS. 14 may be provided.

  In the configuration shown in FIG. 8A, the width of each lower layer groove portion 14 is shorter than the upper layer opening portion 13, and a plurality of lower layer groove portions 14 partially overlapping the upper layer opening portion 13 are parallel to each other. The end portions on the outer side in the width direction of the lower layer groove portions 14 provided on both sides are located on the outer side in the width direction from the upper layer opening portions 13, respectively.

  In the configuration shown in FIG. 8B, the lower layer absorption is based on a part of one lower groove portion 14 provided along the longitudinal direction of the lower layer absorbent body 12 so that a part thereof overlaps the upper layer opening portion 13. A plurality of pairs of lower layer grooves 14 are formed in parallel in the longitudinal direction of the lower layer absorbent body 12 and are formed in a substantially C shape toward both sides in the width direction of the body 12.

  In the configuration shown in FIG. 8C, the end on the rear side 8 side of one lower layer groove 14 provided along the longitudinal direction of the lower layer absorber 12 so as to overlap the upper layer opening 13 is used as the base end. The plurality of lower layer grooves 14 are provided in a substantially fan shape toward the outer side in the width direction of the lower layer absorber 12.

  In the configuration shown in FIGS. 8A to 8C, the plurality of lower layer grooves 14 are provided, whereby the diffusibility of excretory fluid in the lower layer absorber 12 can be further improved. It can absorb the excretory fluid with certainty. In the case of a configuration in which a plurality of lower layer groove portions 14 are provided, each lower layer groove portion 14 is located on the inner side of the widthwise side edges of the lower layer absorber 12.

  Next, a sixth embodiment will be described with reference to FIG. 9 and FIG. In addition, about the structure and effect | action same as said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, in the sixth embodiment, a liquid-permeable upper and lower layer separation sheet that covers the liquid passing portion 16 between the upper layer absorbent body 11 and the lower layer absorbent body 12 of the absorbent body 5. 24 is arranged.

  The upper and lower layer separation sheet 24 is a substantially rectangular liquid-permeable sheet whose length in the width direction is shorter than that of the upper layer absorbent body 11, and is provided across both ends of the absorbent body 5 in the longitudinal direction.

  Thus, by providing the liquid-permeable upper / lower layer separation sheet 24 covering the liquid passing portion 16, the upper layer opening portion 13 and the lower layer groove portion 14 can be separated by the upper / lower layer separation sheet 24. Therefore, when a force is applied to the absorbent body 5 in the mounted state and the lower layer groove portion 14 is pressed to the upper layer opening portion 13 side, the lower layer groove portion 14 enters the upper layer opening portion 13 and the absorber recess 15 and The liquid passing portion 16 can be prevented from being crushed. Further, since the upper and lower layer separation sheet 24 is a liquid-permeable sheet, the upper and lower layer separation sheet 24 does not hinder the inflow of excretory fluid from the upper layer opening 13 to the lower layer groove 14 in the absorber recess 15.

  The upper and lower layer separation sheet 24 is preferably a bulky nonwoven fabric in consideration of the separation between the upper layer opening portion 13 and the lower layer groove portion 14 and the excretion fluid permeability. As long as it is a liquid-permeable sheet that can be prevented from being crushed and can pass excreted liquid, its material and configuration can be appropriately set.

  Further, the upper and lower layer separation sheet 24 can appropriately set the arrangement range as long as it covers at least the liquid passing portion 16. For example, the upper and lower layer separation sheets 24 do not need to be arranged over the entire length or the entire width of the absorber 5.

  In the sixth embodiment, the upper and lower layer separation sheets 24 can be disposed even in a configuration in which crepe paper is disposed as in the seventh embodiment shown in FIG.

  Specifically, a first upper crepe paper 26 is disposed between the top sheet 3 and the upper absorbent body 11, and an upper and lower layer separation sheet 24 is disposed on the lower absorbent body 12 side of the first upper crepe paper 26. A lower layer crepe paper 28 is disposed between the upper and lower layer separation sheet 24 and the lower layer absorber 12.

  As described above, the first upper layer crepe paper 26, the second upper layer crepe paper 27, the upper and lower layer separation sheet 24, and the lower layer crepe paper 28 are disposed, so that the shape retention of the absorber 5 and the upper layer opening 13 are The separability from the lower layer groove part 14 can be improved, and the diffusibility of excretory liquid can be improved.

DESCRIPTION OF SYMBOLS 1 Disposable absorbent article 2 Absorbent article main body 3 Top sheet 4 Back sheet 5 Absorber 6 Front side part 7 Center part 8 Rear side part
11 Upper layer absorber
12 Underlayer absorber
13 Upper layer opening
14 Lower groove
15 Absorber recess
16 Fluid passage
24 Upper and lower layer separation sheet

Claims (4)

Comprising an absorbent article main body having a top sheet positioned on the front side, a back sheet positioned on the back side, and an absorber positioned between the top sheet and the back sheet;
The absorber is
Located on the top sheet side, an upper layer absorber provided with an upper layer opening, and
It is located on the back sheet side, and has a lower layer absorber provided with a lower layer groove part at least partially overlapping the upper layer opening part,
The upper layer opening portion and the lower layer groove portion overlap to form an absorber recess,
A disposable absorbent article in which a portion other than the upper layer opening portion of the upper layer absorbent body and the lower layer groove portion overlap to form a liquid passing portion. The absorbent article body has a front side portion disposed on the front side of the wearer, a central portion disposed on the crotch of the wearer, and a rear side portion disposed on the rear side of the wearer in order along the longitudinal direction. Prepared,
The absorbent body is formed such that the length in the width direction at the center portion is shorter than the length in the width direction at the front side portion and the rear side portion,
The upper layer opening portion is located at the center in the width direction of the upper layer absorber, and is provided from the front side portion to the center portion at least along the longitudinal direction of the upper layer absorber,
The lower layer groove is located at the center in the width direction of the lower layer absorber, and is provided from the center to the rear side along at least the longitudinal direction of the lower layer absorber,
The absorber recess is formed at least in the central portion,
The disposable absorbent article according to claim 1, wherein the liquid passing part is formed at least from the central part to the rear side part. The upper layer opening is formed such that the length in the width direction is longer than the length in the width direction of the lower layer groove,
The disposable absorbent article according to claim 1 or 2, wherein the lower layer groove is located inside both ends in the longitudinal direction of the lower layer absorbent body. The disposable absorbent according to any one of claims 1 to 3, wherein the absorbent is provided with a liquid-permeable upper / lower layer separation sheet that covers the liquid passing portion between the upper layer absorbent and the lower layer absorbent. Goods.

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