JP2016007495A - Disposable absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable absorbent article capable of improving diffusion of excretory fluid and hardly causing the absorbed excretory fluid to return to the skin.SOLUTION: The disposable absorbent article includes an absorbent article body 2 including a top sheet 3, a backside sheet 4, and an absorber 5. The absorbent article body 2 comprises, along the longitudinal direction, one part 6, a central part 7, and the other part 8. The absorber has an upper-layer absorber 13 and a lower-layer absorber 14. The upper-layer absorber 13 has an upper-layer aperture part 15. The upper-layer aperture part 15 includes upper-layer end-part apertures 17 provided on the one part 6 and the other part 8, and an upper-layer central aperture 18 provided at the central part 7. The lower-layer absorber 14 includes lower-layer grooves 16 provided to overlap with the upper-layer end-part apertures 17 and the upper-layer central aperture 18. A fluid passing part 24 is formed of the lower-layer grooves 16 in the longitudinal direction at least between the upper-layer end-part apertures 17 and the upper-layer central aperture 18.

Description

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

  Conventionally, a disposable absorbent article that absorbs excretory fluid such as urine has impermeable fluid that has been absorbed by the absorbent and passed through a liquid-permeable surface sheet disposed on the front side. Leakage of excretory fluid from the back side is prevented by the liquid back sheet.

  In this type of disposable absorbent article, as the one that effectively utilizes the entire absorbent body by diffusing the excretory fluid absorbed by the absorbent body, the absorbent body is located on the top sheet side and an upper layer opening is provided. Further, there is known a configuration including an upper layer absorber and a lower layer absorber provided on the back sheet side and provided with a lower layer groove portion at least partially overlapping the upper layer opening portion (see, for example, Patent Document 1). .

  In the disposable absorbent article of Patent Document 1, the upper layer opening is located at the center in the width direction of the upper layer absorber, and is provided from the front side to the center along the longitudinal direction of the upper layer absorber. , 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, with the upper layer opening and the lower layer groove overlapping at least the center. Thus, the absorber recess is formed, and a portion other than the upper layer opening portion of the upper absorber and the lower layer groove portion are overlapped with the lower side groove portion from the center portion to the rear side portion.

  Then, the excreted liquid that has permeated through the surface sheet moves from the upper layer opening part to the lower layer groove part through the upper layer opening part and the absorber concave part, flows into the liquid passing part, and diffuses in the lower layer absorbent through the liquid passing part. This improves the diffusibility of the excretory fluid in the absorber.

Japanese Patent No. 5394909

  However, in the configuration of Patent Document 1 described above, since the absorber recess is formed in the central portion, excretion fluid easily moves from the upper layer opening portion to the liquid passing portion in the central portion. In some cases, the excretion liquid is difficult to move to the liquid passing part, and the excretion liquid is difficult to diffuse.

  In addition, since the upper layer opening is provided over a wide range from the front side to the center, the excreted fluid once absorbed may return to the skin through the upper layer opening arranged over a wide range. It was.

  This invention is made | formed in view of such a point, and it aims at providing the disposable absorbent article which can improve the diffusibility of excretion liquid, and is hard to generate | occur | produce the back of the absorbed excretion liquid to the skin.

  The disposable absorbent article according to claim 1 includes a top sheet positioned on the front side, a back sheet positioned on the back side, and an absorbent body positioned between the top sheet and the back sheet. An absorbent article body having a direction and a width direction, wherein the absorbent article body has one part located on one side in the longitudinal direction, a center part located in the middle in the longitudinal direction, and the other side in the longitudinal direction. And the absorber includes an upper layer absorber positioned on the top sheet side and a lower layer absorber positioned on the back sheet side, and the upper layer absorber includes the one portion. And an upper layer end opening portion provided in at least one of the other portions, and an upper layer center opening portion provided in the center portion apart from the upper layer end portion opening portion. It has an opening and the lower layer suction The body has a lower layer groove portion provided so as to overlap the upper layer end portion opening portion and the upper layer center opening portion, and at least the upper layer end portion opening portion and the upper layer center opening portion in the absorber. Between the two, a liquid passage portion is formed by the lower layer groove portion.

  The disposable absorbent article according to claim 2 is the disposable absorbent article according to claim 1, wherein the upper layer absorbent body and the lower layer absorbent body are line symmetric in the longitudinal direction of the absorbent article body, and the upper layer end portion is opened. The hole portion is disposed on one side and the other side, and the lower layer groove portion includes the upper layer end opening portion of the one portion, the upper layer central opening portion of the center portion, and the upper layer end opening portion of the other portion. It is arranged from the one part to the other part so as to overlap.

  The disposable absorbent article according to claim 3 is the disposable absorbent article according to claim 1 or 2, wherein the lower layer absorbent body is provided with a plurality of lower layer groove portions spaced apart from each other in the width direction. 1st lower layer absorption part located in this, and the 2nd lower layer absorption part located in the outer side of the width direction from the said lower layer groove part.

  The disposable absorbent article according to claim 4 is the disposable absorbent article according to any one of claims 1 to 3, wherein the absorber is a liquid disposed corresponding to at least the upper layer opening and the lower layer groove. It has a diffusion sheet.

  The disposable absorbent article according to claim 5 is the disposable absorbent article according to claim 4, wherein the liquid diffusion sheet has a longitudinal direction and a widthwise end portion of the sheet body having a width direction, and a center side in the width direction. The liquid diffusion sheet formed in a plurality of layers is positioned at the center in the width direction, and the center in the width direction of the sheet body, and the sheet body is bent. A central liquid diffusion portion in which a front end portion on one end side in the width direction and a front end portion on the other end side in the width direction where the sheet body is bent are laminated, and one end side in the width direction of the central liquid diffusion portion. One end liquid diffusing portion that is positioned and laminated with at least a central portion of the sheet body and a base end portion on one end side in the width direction of the sheet body, and the other end side in the width direction of the central liquid diffusing portion. At least the central part of the sheet body Wherein a proximal end of the other end side of the folded width direction of the sheet body has the other end liquid spreading unit stacked.

  According to the invention described in claim 1, the upper layer end opening portion and the upper layer central opening portion and the lower layer groove portion are arranged to overlap with each other, and the liquid passage portion is formed by the lower layer groove portion. Since the excretory fluid moves from the upper layer end portion opening portion or the upper layer central opening portion to the lower layer groove portion and is diffused through the liquid passing portion, the diffusibility of the excretory fluid can be improved. Moreover, since the upper-layer end part opening part and the upper-layer center opening part are arrange | positioned spaced apart, the reverse return of excretion liquid from an absorber to skin can be suppressed.

  According to the invention described in claim 2, the upper layer absorbent body and the lower layer absorbent body are line symmetric in the longitudinal direction of the absorbent article main body, and the upper layer end opening portion is disposed in one part and the other part, The lower layer groove portion is arranged so as to overlap the upper layer end opening portion of one portion, the upper center opening portion of the central portion, and the upper layer end opening portion of the other portion. There is no need to distinguish between the side and the other side, and it can be easily mounted. Moreover, since the lower layer groove part is arrange | positioned from one part to the other part, the excretion liquid which flowed into the liquid flow part can diffuse to one part and the other part, and can improve diffusibility.

  According to the invention described in claim 3, since the lower layer absorber has the first lower layer absorber located between the lower layer grooves and the second lower layer absorber located outside the lower layer groove in the width direction, The contact area with the excretory fluid in the absorber can be increased, the excretory fluid can be more reliably absorbed by the lower layer absorber, and the return of the excreted fluid to the skin can be suppressed.

  According to the invention described in claim 4, since the liquid diffusion sheet is disposed at least in the portion corresponding to the upper layer opening portion and the lower layer groove portion between the upper layer absorber and the lower layer absorber, the liquid passage portion The diffusibility can be maintained, and the excretory fluid can be diffused more reliably.

  According to the invention described in claim 5, since the liquid diffusion sheet has a plurality of layers, the diffusibility of the liquid passage part can be more reliably maintained.

It is a top view which shows the structure of the disposable absorbent article which concerns on the 1st Embodiment of this invention. (A) is AA sectional drawing in FIG. 1, (b) is BB sectional drawing in FIG. It is sectional drawing which shows the modification of the disposable absorbent article which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the modification of the disposable absorbent article which concerns on the 1st Embodiment of this invention. It is a top view which shows the structure of the disposable absorbent article which concerns on the 2nd Embodiment of this invention. (A) is CC sectional drawing in FIG. 5, (b) is DD sectional drawing in FIG. It is sectional drawing which shows the liquid diffusion sheet of the disposable absorbent article which concerns on the 3rd Embodiment of this invention. (A) And (b) is sectional drawing of the disposable absorbent article by which the liquid diffusion sheet same as the above was arrange | positioned.

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

  In FIG. 1, 1 shows a disposable absorbent article, and this disposable absorbent article 1 includes a substantially rectangular absorbent article body 2 having a longitudinal direction and a width direction.

  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.

  Further, the absorbent article main body 2 has one side 6 located on one side in the longitudinal direction, that is, the abdomen side that is the front side of the wearer in the wearing state, and the center located in the longitudinal direction, that is, the crotch of the wearer in the wearing state. It is comprised by the part 7 and the other part 8 located in the other side of a longitudinal direction, ie, the back | dorsal side which is a wearer's back in a mounting state.

  The top sheet 3 is a substantially rectangular liquid-permeable sheet that is permeable to liquid excretion liquid such as urine, and the back sheet 4 is a substantially rectangular liquid-impermeable (hydrophobic) sheet that does not allow excretion liquid to permeate. It is. 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, or a synthetic resin.

  Furthermore, the top sheet 3 and the back sheet 4 are joined and sealed with the absorber 5 sandwiched therebetween.

  Further, the absorbent article main body 2 has flap portions 11 formed along the longitudinal direction at both ends in the width direction of the top sheet 3 and the back sheet 4 on the outer side in the width direction on both sides of the absorbent body 5. . That is, the flap part 11 is formed in the part extended on the outer side of the width direction from the absorber 5 in the surface sheet 3 and the back surface sheet 4.

  The flap portion 11 is disposed along the longitudinal direction in the central portion 7 with the flap elastic body 12 extending between the top sheet 3 and the back sheet 4. Moreover, when the flap elastic body 12 contracts, the flap portion 11 is easily brought into close contact with the skin of the wearer when the disposable absorbent article 1 is worn.

  Then, the excrement fluid of the wearer passes through the top sheet 3 and is absorbed by the absorbent body 5 while being prevented from leaking outward in the width direction of the absorbent article body 2 at the flap portion 11. Leakage from the absorber 5 to the back side is prevented, and the state absorbed by the absorber 5 is maintained.

  Here, the absorber 5 has an upper layer absorber 13 located on the top sheet 3 side and a lower layer absorber 14 located on the back sheet 4 side.

  The upper layer absorber 13 and the lower layer absorber 14 are formed of, for example, absorbent fibers such as pulp and a polymer absorbent so as to sufficiently absorb the excretory fluid.

  In addition, between the top sheet 3 and the upper layer absorber 13, between the upper layer absorber 13 and the lower layer absorber 14, and between the lower layer absorber 14 and the back sheet 4, the upper layer absorber 13 and the lower layer absorption. A configuration in which crepe paper such as tissue paper is disposed may be used for the purpose of improving the shape retaining property of the body 14 and the transportability during production.

  The lower layer absorbent body 14 has a width in the central portion 7 of the absorbent article main body 2 that is shorter than the length in the width direction of the one portion 6 and the other portion 8, and the central portion 7 is notched in a circular arc shape in the width direction. It is formed in a substantially hourglass shape in plan view. Moreover, the length of the width direction of the lower layer absorber 14 in the one part 6 and the other part 8 is formed shorter than the length of the width direction of the surface sheet 3 and the back sheet 4, and the length of the lower layer absorber 14 in the longitudinal direction is The front sheet 3 and the back sheet 4 are formed shorter than the length in the longitudinal direction.

  The upper layer absorbent body 13 has a substantially rectangular shape having a longitudinal direction and a width direction in plan view, the length in the longitudinal direction is substantially the same as the length in the longitudinal direction of the lower layer absorbent body 14, and the length in the width direction is the central portion. 7, the length in the width direction of the lower layer absorber 14 is the same as that of the shortest portion.

  Further, the upper layer absorbent body 13 and the lower layer absorbent body 14 are axisymmetric with respect to the center line indicated by the alternate long and short dash line in FIG. 1 in the longitudinal direction of the absorbent article body 2.

  And the upper layer absorber 13 is arrange | positioned in the center of the width direction of the lower layer absorber 14, and the absorber 5 is comprised. That is, the absorbent body 5 has a substantially hourglass shape in plan view 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 one part 6 and the other part 8. Arranged in the center of the back sheet 4.

  Here, the upper layer absorber 13 is provided with an upper layer opening portion 15 penetrating the upper layer absorber 13, and the lower layer absorber 14 is provided with a plurality of, for example, two lower layer groove portions 16 penetrating the lower layer absorber 14. Yes.

  As shown in FIG. 1, FIG. 2A and FIG. 2B, the upper layer opening portion 15 is located at one portion 6 and the other portion 8 and is substantially rectangular in the plan view. And an upper-layer central aperture 18 having a substantially rectangular shape in plan view, which is located in the central portion 7 and has a larger aperture area than the upper-layer end aperture 17. That is, the upper layer absorber 13 is provided with the upper layer end opening portion 17, the upper layer central opening portion 18, and the upper layer end opening portion 17 apart from each other along the longitudinal direction.

  The lower layer groove portion 16 has a length in the width direction that is shorter than the upper layer end opening portion 17 and the upper layer central opening portion 18 and has an elongated shape extending from one portion 6 to the other portion 8 in the longitudinal direction of the lower layer absorbent body 14.

  Such a lower layer groove portion 16 is arranged so as to overlap the upper layer end opening portion 17 of the one portion 6, the upper layer center opening portion 18 of the center portion 7, and the upper layer end opening portion 17 of the other portion 8. Has been.

  Further, both end portions in the longitudinal direction of the lower layer groove portion 16 extend inward from both end edges in the longitudinal direction of the lower layer absorbent body 14 and extend toward the end edge portion side from the upper layer end portion opening portion 17. In addition, if both ends in the longitudinal direction of the lower layer groove portion 16 are provided up to the end edge portion in the longitudinal direction of the lower layer absorber 14, the excretion liquid may leak from the longitudinal direction through the lower layer groove portion 16, The lower layer groove 16 preferably has a configuration in which both end portions in the longitudinal direction are disposed inside both end portions in the longitudinal direction of the lower layer absorbent body 14.

  Further, one end edge in the width direction of one of the two lower layer groove portions 16 coincides with one end edge in the width direction of the upper layer end opening portion 17 and the upper layer central opening portion 18 in the cross-sectional direction, and The other end edge in the width direction at the other of the lower layer groove portions 16 is arranged so as to coincide with the other end edge portion in the width direction of the upper layer end opening portion 17 and the upper layer central opening portion 18 in the cross-sectional direction. Yes.

  Then, the excreted liquid that has permeated through the top sheet 3 flows into the lower layer groove 16 from the upper layer end opening portion 17 or the upper layer central opening portion 18.

  Here, the upper layer end opening portion 17 and the upper layer central opening portion 18 are more easily discharged fluid into the lower layer groove portion 16 as the opening area is larger, but the once excreted fluid that has been absorbed easily returns to the skin. Become. Therefore, it is preferable that the upper layer end portion opening portion 17 and the upper layer central opening portion 18 have a side length of 3 cm or more and 10 cm or less. Further, the upper layer end portion opening portion 17 is preferably configured so that the length in the width direction is not less than 1/3 and not more than 2/3 of the length in the width direction of the absorbent body 5 in the one portion 6 or the other portion 8. The central opening 18 is preferably configured so that the length in the width direction is not less than 1/3 and not more than 2/3 of the length in the width direction of the absorber 5 in the center 7.

  The lower layer absorbent body 14 includes two lower layer groove portions 16 spaced apart from each other in the width direction, a first lower layer absorber portion 21 located between these lower layer groove portions 16, and a first lower layer absorbent portion located outside the lower layer groove portion 16 in the width direction. 2 lower layer absorption parts 22.

  The first lower layer absorbent portion 21 is located at a substantially central portion in the width direction of the absorber 5 and is formed so that the length in the width direction is longer than the length of the lower layer groove portion 16 and shorter than the length of the second lower layer absorbent portion 22 in the width direction. Has been.

  As shown in FIG. 2A, which is a cross-sectional view taken along the line AA in FIG. 1, the absorbent body 5 is a portion where the upper layer opening portion 15 and the lower layer groove portion 16 overlap each other. Absorber recess 23 communicating with groove 16 is formed. In addition, in this absorber recessed part 23, since the upper layer absorber 13 and the lower layer absorber 14 are not arrange | positioned, the surface sheet 3 and the back surface sheet 4 are joined.

  Moreover, the absorber 5 is located in the back surface sheet 4 side of the non-opening part other than the upper layer opening part 15 in the upper layer absorber 13, as shown in FIG. 2 (b) which is a BB sectional view in FIG. The lower layer groove portion 16 forms a hollow liquid passage portion 24 through which excretory fluid can pass. That is, the liquid passing portion 24 is formed by being surrounded by the non-opened portion of the upper layer absorbent body 13, the lower layer absorbent body 14, and the back sheet 4 in a cross-sectional view.

  The operation of the following 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, that is, the clothing side, and one part 6 Are located on the wearer's ventral side, the central part 7 is located on the wearer's crotch, and the other part 8 is located on the wearer's back side, for example, a pants-type absorbent article such as a diaper or underwear It is installed inside the pants-type absorbent article and underwear.

  In the wearing state of the disposable absorbent article 1, when the wearer is a male, the upper layer end opening portion 17 of the one part 6 corresponds to the urination site of the wearer, and when the wearer is a female, the upper layer The central opening 18 corresponds to the urination site of the wearer. When the wearer is a woman, the upper layer central opening 18 corresponds to the urination site, so it is not necessary to check the one part 6 side and the other part 8 side of the absorbent article body 2 when wearing.

  The excretion fluid of the wearer passes through the top sheet 3 and flows into the upper layer end opening portion 17 or the upper layer central opening portion 18.

  The excretory fluid that has flowed into the upper layer end opening portion 17 or the upper layer central opening portion 18 moves to the lower layer groove portion 16 through the absorber recess 23 and flows into the liquid passing portion 24.

  The excretory fluid that has flowed into the fluid passing portion 24 is absorbed by the lower layer absorber 14 while moving toward the one portion 6 side or the other portion 8 side through the fluid passing portion 24. That is, in the liquid passing part 24, the diffusion of the excretory liquid in the lower layer absorbent 14 is promoted, and the excreted liquid is absorbed by the lower layer absorbent 14 while being diffused.

  In addition, although the excretory liquid diffused in the liquid passing part 24 is also absorbed by the upper layer absorbent body 13, it is absorbed from the lower side, which is the back sheet 4 side of the upper layer absorbent body 13. However, it is difficult to reach the upper surface of the upper layer absorbent body 13 on the surface sheet 3 side, that is, the surface on the wearer side.

  And according to the said disposable absorbent article 1, while arrange | positioning so that the upper layer edge part opening part 17, the upper layer center opening part 18, and the lower layer groove part 16 may overlap, the liquid flow part 24 is formed by the lower layer groove part 16. By being formed, the excretory liquid moves from the upper layer end opening part 17 or the upper layer central opening part 18 to the lower layer groove part 16 and is diffused through the liquid passing part 24. Can improve the diffusibility. Therefore, the absorption capacity of excretory fluid can be ensured by efficiently using the entire absorbent body 5, and leakage of excretory fluid can be prevented.

  In addition, since the excretory fluid is absorbed by the lower layer absorber 14 while being diffused through the liquid passing portion 24, the amount of excreted fluid absorbed by the upper layer absorber 13 can be suppressed, and the absorbed excretory fluid is absorbed by the upper layer absorber. It is difficult to reach the upper surface of 13 and the back of excretion fluid from the absorbent body 5 to the skin can be suppressed.

  Further, since the upper layer end opening portion 17 and the upper layer central opening portion 18 are separated from each other, the opening area in the upper layer absorbent body 13 can be kept as small as possible, and the skin from the absorbent body 5 through the opening portion can be reduced. It is possible to suppress the return of excretory fluid to the back.

  Further, the upper layer absorbent body 13 and the lower layer absorbent body 14 are line symmetric in the longitudinal direction of the absorbent article body 2, the upper layer end opening portion 17 is disposed in the one portion 6 and the other portion 8, and the lower layer groove portion 16 is formed. Since it is arranged so as to overlap the upper layer end opening part 17 of the one part 6, the upper center opening part 18 of the center part 7 and the upper layer end opening part 17 of the other part 8, It is not necessary to distinguish the one part 6 side and the other part 8 side, and can be easily mounted.

  That is, even if the wearer is a male, the upper layer end opening portion 17 is provided in the one part 6 and the other part 8, so that the one part 6 side and the other part 8 side of the absorbent article main body 2 are provided. The upper layer end opening portion 17 is arranged corresponding to the urination site of the wearer. Further, since the lower layer groove portion 16 overlaps the upper layer end opening portion 17 of the one portion 6, the upper layer center opening portion 18 of the center portion 7 and the upper layer end portion opening portion 17 of the other portion 8, No matter which excretion liquid flows from either the upper layer end opening 17 of the upper part 6 or the upper end end opening 17 of the other part 8, it can move to the lower layer groove 16 and diffuses to the opposite side through the liquid passing part 24 it can.

  Since the lower layer absorber 14 has the first lower layer absorber 21 located between the lower layer grooves 16 and the second lower layer absorber 22 positioned outside in the width direction from the lower layer groove 16, the lower layer groove 16 is one. Compared with a certain configuration, the contact area of the lower layer absorbent body 14 with the excretory fluid can be increased. Therefore, the lower layer absorber 14 can more reliably absorb the excretory fluid and suppress the return of the excreted fluid to the skin.

  In addition, since the first lower layer absorbing portion 21 is positioned at a substantially central portion in the width direction of the absorbent body 5, the excretory fluid can be absorbed at the center in the width direction in which the excretory fluid is most likely to flow. Can be prevented from returning to the skin.

  In addition, in the said 1st Embodiment, it was set as the structure by which the flap part 11 was provided in the both sides of the absorber 5, However, It is not limited to such a structure, It is set as the structure by which the flap part 11 is not provided. Also good.

Further, in the case of the configuration in which the flap portion 11 is provided, both end portions in the width direction of the top sheet 3 and the back sheet 4 are folded back, and the flap portion 11 is formed in the folded portion. Good.

  Furthermore, although the flap part 11 was set as the structure formed in the surface sheet 3 and the back surface sheet 4, it was not limited to such a structure, and was formed only in either the surface sheet 3 or the back surface sheet 4. It may be configured.

  Further, a separate sheet and an elastic body may be disposed on both sides of the absorbent body 5 to form a so-called three-dimensional gather.

  Although the absorber 5 has a substantially hourglass-like configuration, the configuration is not limited to such a configuration, and the shapes of the absorber 5 and the upper-layer absorber 13 and the lower-layer absorber 14 can be appropriately designed.

  Moreover, although the upper layer absorbent body 13 and the lower layer absorbent body 14 are configured to be line symmetric in the longitudinal direction of the absorbent article body 2, the present invention is not limited to such a configuration, and the longitudinal direction and width of the absorbent article body 2. You may make it the structure which is not line symmetrical in a direction.

  The upper layer opening portion 15 has a configuration in which the upper layer end portion opening portion 17 is provided in the one portion 6 and the other portion 8, but is not limited to such a configuration. It is sufficient that the upper layer end opening portion 17 is provided in at least one of them.

  In addition, the upper layer central opening 18 has a configuration in which the opening area is larger than that of the upper layer end opening 17, but the present invention is not limited to this configuration, and the upper layer end opening 17 and the upper layer central opening 18 are not limited thereto. The size of can be determined as appropriate.

  If the upper layer opening 15 and the lower layer groove 16 are arranged so that a part of the lower layer groove 16 overlaps the upper layer end opening 17 and the upper center opening 18, the shape and number are determined as appropriate. it can.

  Further, the upper layer opening portion 15 and the lower layer groove portion 16 have one end edge portion in the width direction in one of the lower layer groove portions 16, and one end edge portion in the width direction of the upper layer end portion opening portion 17 and the upper layer central opening portion 18. The other end edge in the width direction at the other of the lower layer groove portions 16 is arranged to coincide with the other end edge in the width direction of the upper layer end opening portion 17 and the upper layer central opening portion 18. However, the present invention is not limited to such a configuration. That is, in the width direction of the absorbent article body 2, if the lower layer groove portion 16 is disposed so that a part of the lower layer groove portion 16 overlaps the upper layer end portion opening portion 17 and the upper layer central opening portion 18, the entire lower layer groove portion 16 is formed. It is not necessary to be disposed so as to overlap the upper layer end opening portion 17 and the upper layer central opening portion 18.

  The lower layer groove portion 16 has an elongated shape extending from one portion 6 to the other portion 8 in the longitudinal direction, and the upper layer end portion opening portion 17 of the one portion 6, the upper layer end portion opening portion 17 of the center portion 7, and the other portion 8. The upper layer end opening portion 17 is arranged so as to overlap with the upper layer end opening portion 17, but is not limited to such a configuration, and the upper layer end opening portion 17 of the one portion 6 and the upper layer end portion of the other portion 8 The shape can be determined as appropriate as long as it is arranged so as to overlap at least one of the apertures 17 and the upper central aperture 18.

  In addition, the lower layer absorbent body 14 has a configuration in which a plurality of lower layer groove portions 16 are disposed apart from each other in the width direction and includes a first lower layer absorbent portion 21 and a second lower layer absorbent portion 22. The number and arrangement of the lower layer grooves 16 can be determined as appropriate, and the configuration of the lower layer absorber 14 can be determined as appropriate according to the number and arrangement of the lower layer grooves 16.

  The absorber 5 has a configuration in which the absorber recess portion 23 is formed by the upper layer opening portion 15 and the lower layer groove portion 16 and the liquid passage portion 24 is formed by the non-opening portion and the lower layer groove portion 16 in the upper layer absorber 13. However, the present invention is not limited to such a configuration, and any configuration in which the liquid passing portion 24 is formed by the lower layer groove portion 16 may be used. That is, as in the modification shown in FIG. 3, the upper layer opening portion 15 and the lower layer groove portion 16 are separated from each other without joining the top sheet 3 and the back sheet 4 in the lower layer groove portion 16, thereby joining the upper layer. The upper layer absorber recess 27 may be formed by the aperture 15 and the surface sheet 3, and a hollow liquid passing portion 28 may be formed by the lower layer groove 16 and the surface sheet 3.

  Further, although the lower layer groove portion 16 is configured to penetrate the lower layer absorbent body 14, it is not limited to such a configuration, and any configuration may be used as long as the liquid passage portion can be formed by the lower layer groove portion 16. That is, as in the modification shown in FIG. 4, the lower layer groove portion 29 is formed to a depth up to substantially the center in the cross-sectional direction of the lower layer absorber 14, and the liquid passage portion 30 is formed in the lower layer groove portion 29. You may make it.

  Further, the liquid passing part 24 is configured to be provided from the upper part end opening part 17 to the outer side in the longitudinal direction from the one part 6 to the other part 8, but is not limited to such a structure. As long as it is provided at least between the upper layer end opening portion 17 and the upper layer central opening portion 18 in the longitudinal direction, the length can be determined as appropriate.

  Further, in the case where the crepe paper is provided for the purpose of retaining the shape of the absorbent body 5 and the like, the upper layer opening 15 and the lower layer groove 16 are also provided with the crepe paper. There may be no configuration.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, in the absorber 31, a liquid diffusion sheet 34 is disposed between the upper layer absorber 32 and the lower layer absorber 33.

  Specifically, in the liquid diffusion sheet 34, between the upper layer absorber 32 and the lower layer absorber 33, one surface covers the lower layer groove portion 37, and the other side surface is the upper layer opening portion, that is, the upper layer central opening portion 35 and the upper layer. Corresponding to the upper layer opening portion and the lower layer groove portion 37, the absorber 31 is disposed over the entire length in the longitudinal direction so as to cover the end portion opening portion.

  Here, in the use state in the first embodiment, when pressure is applied to the absorbent body 5 so as to compress the top sheet 3 side and the back sheet 4 side, for example, when the wearer is sitting, the upper layer absorption There is a case where the body 13 enters the lower layer groove part 16 and the space of the liquid passing part 24 is blocked, and the diffusibility is lowered.

  Therefore, by disposing the liquid diffusion sheet 34, in the portion where the upper layer opening portion and the lower layer groove portion 37 overlap, the top sheet 3 and the bottom layer absorber 33 or the back sheet 4 as shown in FIG. A liquid diffusion sheet 34 is disposed between them. Further, in the portion where the upper layer absorber 32 and the lower layer groove portion 37 overlap, as shown in FIG. 6B, the liquid diffusion sheet 34 is interposed between the upper layer absorber 32 and the lower layer absorber 33 or the back sheet 4. Arranged.

  Therefore, even if pressure is applied to the absorber 31 so as to compress the top sheet 3 side and the back sheet 4 side, the shape of the liquid passing portion 38 is held by the liquid diffusion sheet 34, and the liquid passing portion 38 is in the longitudinal direction. It will be in the state of communicating with. Therefore, the diffusibility of the excretion liquid by the liquid passing part 38 can be maintained, and the excretion liquid can be diffused more reliably.

  As the liquid diffusion sheet 34, a sheet body that is bulky (thickness) sufficient to hold the liquid passing portion 38 and can pass excretory fluid within the liquid passing portion 38 is used. Further, considering the feeling of wearing, a material having cushioning properties is preferable. In consideration of thickness, liquid permeability, and cushioning properties, for example, a nonwoven fabric or the like is preferable.

  Further, the liquid diffusion sheet 34 need not be disposed over the entire length in the longitudinal direction or the width direction of the absorber 31 as long as it is disposed corresponding to at least the upper layer opening portion and the lower layer groove portion 37. If it is arranged so as to cover the upper layer central opening 35 and the upper layer end opening 36 and the other surface covers the lower layer groove 37, the arrangement range can be determined as appropriate.

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

  In the third embodiment, instead of the liquid diffusion sheet 34 of the second embodiment, a liquid diffusion sheet 41 in a folded state as shown in FIG. 7 is used.

  The liquid diffusion sheet 41 is formed by a single sheet body 42 having a longitudinal direction and a width direction, and both end portions in the width direction are bent toward the center side and formed in a plurality of layers.

  The liquid diffusion sheet 41 bent in this way and formed into a plurality of layers includes a central liquid diffusion portion 43 located at the center in the width direction and one end liquid diffusion located at one end side in the width direction of the central liquid diffusion portion 43. Part 44 and the other end liquid diffusion part 45 located on the other end side in the width direction of the central liquid diffusion part 43.

  The central liquid diffusion portion 43 includes a central portion 46 in the width direction of the sheet body 42, a tip portion 47 on one end side in the width direction of the sheet body 42, and the other end side in the width direction of the sheet body 42 that is bent. The front end portion 48 is laminated to have three layers.

  The one-end liquid diffusing portion 44 is formed of two layers by laminating a center portion 46 in the width direction of the sheet body 42 and a base end portion 49 on one end side in the width direction of the sheet body 42 that is bent.

  The other end liquid diffusing portion 45 is composed of two layers in which a central portion 46 in the sheet body 42 and a base end portion 50 on the other end side in the width direction of the sheet body 42 are stacked.

  In such a liquid diffusion sheet 41, the central liquid diffusion part 43 is disposed on the first lower layer absorption part 21, and one end liquid diffusion part 44 and a part of the other end liquid diffusion part 45 are the upper layer absorber 32 and the lower layer absorber. It is arranged between 33.

  By using the multi-layer liquid diffusion sheet 41, the liquid diffusion sheet 41 can easily follow the shape of the lower layer groove portion 37 as compared with the single-layer liquid diffusion sheet 34, and the holding power of the liquid passing portion 38 can be improved. In addition, the diffusibility of the liquid passing portion 38 can be more reliably maintained.

  Here, for example, when a plurality of sheet bodies are stacked to form a multi-layer liquid diffusion sheet, if the plurality of sheet bodies are not joined to each other, positional deviation may occur between the sheet bodies at the time of manufacture or use. Therefore, it is necessary to join and fix the sheet bodies.

  On the other hand, since the liquid diffusion sheet 41 is formed by folding one sheet body 42, it is difficult to cause positional deviation between the overlapping portions, and the liquid diffusion sheet 41 is configured not to be joined or the joining is minimized. It can be configured to be suppressed. Therefore, the liquid diffusion sheet 41 can be easily manufactured, and the deterioration of the liquid diffusion performance and the wearing feeling due to the bonding can be prevented.

  In addition, as shown in FIG. 8A, which is a cross-sectional view taken along the line C-C in the case where a liquid diffusion sheet 41 is provided in place of the liquid diffusion sheet 34 in FIG. 5, the central liquid diffusion portion 43 is long in the width direction. A configuration in which the length is shorter than the length in the width direction of the upper central opening 35 is preferable. That is, the thickest central liquid diffusion portion 43 laminated in three layers is positioned on the inner side of the upper layer central opening 35 in the width direction, so that the surface sheet 3 can be attached even at the location where the upper layer central opening is provided. Can be flat.

  Furthermore, as shown in FIG. 8 (b), which is a DD cross-sectional view when the liquid diffusion sheet 41 is provided in place of the liquid diffusion sheet 34 in FIG. In the hole portion, the central liquid diffusion portion 43 is compressed by the upper layer absorber 32 and the lower layer absorber 33, so that the top sheet 3 can be flattened. Therefore, by using the liquid diffusion sheet 41 having a plurality of layers, not only the liquid passing portion 38 can be held, but also the surface of the absorbent article main body 2 is not formed with a dent, and the adhesion to the skin can be improved.

  The liquid diffusion sheet 41 has a configuration in which the central liquid diffusion portion 43 has three layers and the one-end liquid diffusion portion 44 and the other-end liquid diffusion portion 45 have two layers. If it is a layer, a folding method can be selected and determined appropriately.

DESCRIPTION OF SYMBOLS 1 Disposable absorbent article 2 Absorbent article main body 3 Top sheet 4 Back sheet 5 Absorber 6 One part 7 Center part 8 Other part
13 Upper absorber
14 Underlayer absorber
15 Upper layer opening
16 Lower groove
17 Upper layer edge opening
18 Upper layer central opening
21 First lower layer absorber
22 Second lower layer absorber
24 Fluid passage
28 Fluid passage
29 Lower groove
30 Fluid passage
31 Absorber
32 Upper layer absorber
33 Underlayer absorber
34 Liquid diffusion sheet
35 Upper layer central opening
36 Upper layer edge opening
37 Lower groove
38 Fluid passage
41 Liquid diffusion sheet
42 Sheet body
43 Central liquid diffusion part
44 One end liquid diffusion part
45 Liquid diffusion part at the other end
46 Central
47 Tip
48 Tip
49 Base end
50 Base end

Claims (5)

A surface sheet positioned on the front surface side, a back sheet positioned on the back surface side, and an absorbent body positioned between the surface sheet and the back sheet, and comprising an absorbent article body having a longitudinal direction and a width direction. ,
This absorbent article body is composed of one part located on one side in the longitudinal direction, a central part located in the middle in the longitudinal direction, and the other part located on the other side in the longitudinal direction,
The absorber has an upper layer absorber positioned on the top sheet side and a lower layer absorber positioned on the back sheet side,
The upper-layer absorber is provided in the central portion apart from the upper-layer end opening portion provided in at least one of the one portion and the other portion, and the upper-layer end portion opening portion. Having an upper layer opening with an upper layer central opening,
The lower layer absorber has a lower layer groove portion provided so as to overlap the upper layer end portion opening portion and the upper layer central opening portion,
A disposable absorbent article, wherein a liquid passage portion is formed by the lower layer groove portion at least between the upper layer end portion opening portion and the upper layer central opening portion in the absorbent body. The upper layer absorber and the lower layer absorber are line symmetric in the longitudinal direction of the absorbent article body,
The upper layer end opening is disposed on one side and the other side,
The lower layer groove portion is arranged from the one portion to the other portion so as to overlap the upper layer end opening portion of the one portion, the upper center opening portion of the central portion, and the upper layer end opening portion of the other portion. The disposable absorbent article according to claim 1, wherein the disposable absorbent article is provided. The lower layer absorber includes a plurality of lower layer grooves spaced apart in the width direction, a first lower layer absorber positioned between the lower layer grooves, and a second lower layer absorber positioned outside the lower layer groove in the width direction. The disposable absorbent article according to claim 1 or 2, characterized by comprising: The absorbent article according to any one of claims 1 to 3, wherein the absorbent body has a liquid diffusion sheet disposed corresponding to at least the upper layer opening and the lower layer groove. The liquid diffusion sheet is formed in a plurality of layers by bending both end portions in the width direction of the sheet body having the longitudinal direction and the width direction to the center side in the width direction,
The liquid diffusion sheet formed in this multi-layer shape,
Located at the center in the width direction, the center in the width direction of the sheet body, the tip end on one end side in the width direction of the sheet body, and the other end side in the width direction in which the sheet body is folded A central liquid diffusion part in which the tip part of
One end liquid diffusing portion, which is located on one end side in the width direction of the central liquid diffusing portion, and at least a central portion of the sheet body and a base end portion on one end side in the width direction where the sheet body is folded,
The other end liquid diffusion is located on the other end side in the width direction of the central liquid diffusion portion, and at least the center portion of the sheet body and the base end portion on the other end side in the width direction where the sheet body is folded are stacked. The disposable absorbent article according to claim 4, further comprising: a portion.

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