JP2017136273A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb humor by an entire absorber by enhancing diffusivity of the humor heading vertically upward in an absorbent article including a slit or slits formed thereon.SOLUTION: The absorbent article includes: a liquid permeable top sheet 10; a back sheet 20; and at least two absorbers 30 and 40 superposedly disposed between the top sheet 10 and the back sheet 20. The two absorbers are an upper layer absorber 30 located in the top sheet 10 side, and a lower-layer absorber 40 located in the back sheet 20 side. The upper layer absorber 30 includes one or a plurality of slits 36 penetrating in the thickness direction of the absorber. The lower layer absorber 40 includes a plurality of compression lines 41 formed by recessing the absorbers in the thickness direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorbent article that is attached to a crotch of a wearer and absorbs and holds a liquid such as urine.

  2. Description of the Related Art Absorbent articles that are worn on a wearer's crotch are known for the purpose of absorbing and holding excreted body fluid. Examples of absorbent articles are disposable diapers, urine pads, and sanitary napkins. In addition, as disposable diapers, for example, a pants type in which the left and right sides of the front body and the back body are joined, or a tape type that is worn with a fastening tape attached to the back body attached to the front body It has been known.

  In addition, some absorbent articles are configured to be able to absorb a large amount of body fluid so that they can be worn for a long time or can be excreted by an adult. For example, as such an absorbent article, a urine absorbing pad with a high absorption amount used for nursing care is known. A high-absorption urine collection pad is generally used by being inserted into a tape-type or pants-type disposable diaper, and is replaced as appropriate after excretion. Such a urine collection pad generally includes an absorbent body composed of a large amount of absorbent material so as to absorb a large amount of body fluid, and its shape also covers a large area of the wearer's body. It is enlarged so that it can.

  However, even if the urine absorbing pad has a high absorption amount as described above, body fluid leaks out if worn for a long time, and the tape-type or pants-type disposable diaper placed under it will be soiled. Sometimes. That is, if it continues to wear for a long time, it will continue to absorb body fluid repeatedly at one place (especially the crotch part) of the absorbent body. For this reason, if the diffusibility of the absorber is poor, the absorption load is partially increased, and body fluid that cannot be completely absorbed when the absorption amount is saturated flows out from the urine collection pad. For this, in order to increase the amount of absorption in the crotch part of the absorbent body, it may be possible to increase the absorption of body fluids partially by increasing the absorbent material in the crotch part. Since the thickness is increased, there is a concern that the feeling of wearing becomes worse and the comfort is lowered.

  Therefore, in order to improve the diffusibility of a large absorbent body with such a high absorption amount, an absorbent article in which a slit is formed that penetrates the absorbent body in the thickness direction is known (Patent Document 1 and Patent Document 2). . For example, Patent Document 1 discloses a technique for forming a Y-shaped slit for a single-layer absorber. Patent Document 2 discloses a technique in which a plurality of absorbers are stacked in the thickness direction and slits are formed in the respective absorbers. Such slits increase the liquid diffusibility, improve the fit of the wearer's body, prevent stool and other solid matter from touching the wearer's skin for a long time, and flex the absorber. It is formed in the absorbent body for various purposes such as facilitating it.

JP 2012-090818 A JP 2014-014726 A

  However, when a slit is formed in the absorber to increase the liquid diffusibility, the body fluid flows through the slit, so that the diffusivity at the portion where the slit is formed can be increased, but the body fluid is absorbed into the absorber. It was not easy to diffuse throughout. In other words, the slit can diffuse the body fluid in the horizontal direction when the wearer is sleeping, but the body fluid is directed upward in the vertical direction when the wearer is standing. Cannot be spread or sucked up. For this reason, although the diffusion speed of the body fluid can be increased by forming the slit, it is difficult to diffuse and penetrate the body fluid throughout the absorbent body, particularly when the wearer is in a standing posture.

  In addition, increasing the number of slits formed in the absorber may increase the diffusivity, but if slits are formed in the entire absorber, irregularities will be formed on the surface of the absorber, impairing comfort. There was a problem.

  Therefore, the present invention provides an absorbent article having an absorbent body with slits, which improves the diffusibility of body fluids directed upward in the vertical direction so that the entire absorbent body can be used even when the wearer is in a standing position. An object of the present invention is to make it possible to absorb body fluid.

  As a result of earnestly examining the means for solving the above problems, the inventor of the present invention has formed a slit in the uppermost absorbent body in the absorbent article in which a plurality of absorbent bodies are laminated, and the absorbent body located in the lower layer is formed. One or more pressing lines were to be formed. As a result, the body fluid diffuses through the slit of the upper absorbent body and flows down to the lower absorbent body, and further diffuses along the squeezed line formed in the lower absorbent body. We have learned that we will absorb body fluids. Furthermore, the squeezing line formed in the lower absorbent body has the ability to suck up body fluids vertically upward by capillary action. For this reason, by forming a squeezing line on the lower absorbent body, particularly preferably by forming a squeezing line so as to overlap with the slit of the upper absorbent body, the bodily fluid flowing down from the slit is vertically upward through the squeezing line. Can spread. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention. More specifically, the present invention has the following configuration.

  The present invention relates to absorbent articles such as disposable diapers, urine pads, and sanitary napkins. The absorbent article includes a liquid-permeable top sheet 10, a back sheet 20, and at least two absorbers 30 and 40 that are stacked between them. The back sheet 20 is preferably a liquid-impermeable sheet member, but a liquid-permeable sheet member can also be used. Here, the at least two absorbers include an upper layer absorber 30 located on the top sheet 10 side and a lower layer absorber 40 located on the back sheet 20 side. The upper layer absorber 30 has one or a plurality of slits 36 penetrating in the thickness direction of the absorber. The lower layer absorbent body 40 has a plurality of squeezed lines 41 in which the absorbent body is recessed in the thickness direction. The “slit” formed in the upper layer absorber 30 has a hole shape with both ends closed, a shape with one end closed and the other end open, and both ends open with the absorber The shape of the part to divide is included.

  By forming the slit 36 in the upper layer absorber 30 as described above, body fluid such as urine diffuses through the upper layer absorber 30 through the slit 36 and flows down to the lower layer absorber 40 through the slit 36. Moreover, since the squeezing line 41 is formed in the lower layer absorbent body 40, the bodily fluid that has flowed down through the slit 36 diffuses the lower layer absorbent body 40 along the squeezed line 41. In particular, since the squeezing line 41 formed in the lower layer absorbent body 40 has the ability to suck up body fluid vertically upward, the body fluid is absorbed along the squeezed line 41 even when the wearer is in a standing posture. Widely diffuses in the body 40. Furthermore, the body fluid that has diffused the lower layer absorbent body 40 along the squeezing line 41 penetrates into the upper layer absorbent body 30. Thereby, it becomes possible to absorb a bodily fluid over the upper and lower absorbers 30 and 40 as a whole.

  In the absorbent article of the present invention, it is preferable that the slit 36 of the upper absorbent body 30 overlaps at least a part of the squeezing line 41 of the lower absorbent body 40.

  As described above, by positioning the pressing line 41 of the lower layer absorbent body 40 below the slit 36 of the upper layer absorbent body 30, the bodily fluid that has flowed down through the slit 36 is directly guided to the compressed line 41 and is compressed as it is. It spreads along the line 41. By connecting the slit 36 and the squeezing wire 41, it becomes possible to absorb body fluid using the entire absorbent body, the absorption speed and the amount of absorption can be improved, and leakage of body fluid can be prevented.

  In the absorbent article of the present invention, it is preferable that the slit 36 of the upper absorbent body 30 extends in the longitudinal direction of the absorbent article. In this case, this slit 36 overlaps with the pressing line extending along the width direction of the absorbent article or the pressing line extending along the direction inclined with respect to the longitudinal direction, among the pressing lines 41 of the lower layer absorbent body 40. Is preferred.

  By overlapping the slit 36 extending in the longitudinal direction and the squeezing line 41 extending in the width direction as in the above configuration, the body fluid can be diffused in the longitudinal direction and at the same time in the width direction. In particular, the body fluid is difficult to diffuse in the longitudinal direction, and the body fluid tends to leak from the end in the width direction. For this reason, it is preferable to form the slit 36 extended in a longitudinal direction in the upper layer absorber 30, and to form the pressing line 41 extended in the width direction in the lower layer absorber 40. Thereby, the body fluid which contacted the upper layer absorber 30 first can be diffused in the longitudinal direction, and thereafter the body fluid that has permeated the lower layer absorber 40 can be diffused in the width direction as an auxiliary. As a result, body fluid can be efficiently diffused in the longitudinal direction, and leakage from the end in the width direction can be prevented. In addition, by positioning the pressing line 41 extending in the width direction of the lower layer absorbent body 40 below the slit 36 of the upper layer absorbent body 30, as in the case where the upper layer absorbent body 30 is sandwiched between both legs of the wearer, the width direction Even when pressure is received from the slit 36, the slit 36 is difficult to narrow. That is, by forming the pressing line 41 extending in the width direction on the lower layer absorber 40, the rigidity of the lower layer absorber 40 with respect to the pressure in the width direction is increased. As a result, the rigidity of the upper layer absorber 30 joined to the lower layer absorber 40 is also increased, so that the slit 36 formed in the upper layer absorber 30 is not easily crushed.

  In the absorbent article of the present invention, the upper absorbent body 30 preferably has a plurality of pressing lines 31 in which the absorbent body is recessed in the thickness direction.

  Like the said structure, the diffusibility of the bodily fluid on the surface of the upper layer absorber 30 can further be improved by forming the pressing line 31 in the upper layer absorber 30 in addition to the slit 36. Moreover, since the range which a bodily fluid osmose | permeates the upper layer absorber 30 along the pressing line 13 spreads, and the body fluid which osmose | permeated the upper layer absorber 30 moves to the lower layer absorber 40 after that, the upper and lower absorbers 30 and 40 are utilized. Thus, it becomes possible to absorb body fluids widely.

  In the absorbent article of the present invention, it is preferable that the plurality of squeezed wires 31 formed on the upper absorbent body 30 include those connected to the slit 36. That is, at least one end of the pressing line 31 on which the upper layer absorbent body 30 is formed reaches the slit 36, the outer peripheral edge of the slit 36 is in the pressing state, and the pressing line 31 and the slit 36 communicate with each other. Preferably there is.

  As in the above configuration, in the upper layer absorbent body 30, the slit 36 and the pressing line 31 communicate with each other, so that the body fluid temporarily accumulated in the slit 36 is easily transmitted through the pressing line 31 and diffuses. On the other hand, since the body fluid diffused through the squeezing line 31 may flow into the slit 36, the body fluid can be easily guided to the lower layer absorber 40 through the slit 36. In addition, when the slit 36 and a part of the pressing line 31 are connected, the body fluid temporarily accumulated in the slit 36 is easily transmitted through the pressing line 31 and diffuses. In particular, since the body fluid can be diffused from the inner wall surface of the slit 36 through the pressing wire 31, the diffusibility of the body fluid in the upper layer absorbent body 30 can be enhanced.

  In the absorbent article of the present invention, the lower layer absorbent body 40 preferably has a non-squeezed region 42 surrounded by a pressing line 41. In this case, it is preferable that the slit 36 of the upper layer absorbent body 30 overlaps at least a part of the non-compressed region 42 of the lower layer absorbent body 40.

  Here, in the lower layer absorbent body 40 in which the compressed line 41 is formed, when the body fluid is absorbed by the absorbent body, the body fluid diffuses in time along the compressed line 41 due to capillary action, and the non-compressed body In the region 42, diffusion is performed later. Thus, in the site | part in which the pressing line 41 was formed, and the non-pressing area | region 42, there exists a time difference in the spreading | diffusion time of a bodily fluid. When the basis weight of the absorbent material constituting the absorbent body is low, the time difference of the diffusion time is not a big problem, but if the basis weight of the absorbent material is increased to increase the amount of absorbed body fluid, The liquid absorption time in the pressing area 42 becomes later. For this reason, particularly in the case of an absorbent body with a high absorption amount, the time difference in the diffusion time of the body fluid is further increased between the site where the compressed line 41 is formed and the non-compressed region 42, and in some cases, only the compressed line 41 is wetted with the body fluid. Thus, a situation may occur in which the body fluid can hardly be absorbed in the non-compressed region 42. Therefore, as described above, by positioning the slit 36 of the upper absorbent body 30 above the non-compressed area 42 of the lower absorbent body 40, it is possible to rapidly infiltrate the body fluid into the non-compressed area 42 as well. It becomes.

  In the absorbent article of the present invention, the lower layer absorbent body 40 preferably has an intersection point 43 where the squeezed lines 41 intersect. In this case, it is preferable that the slit 36 of the upper layer absorber 30 overlaps the intersection part 43 of the lower layer absorber 40.

  As in the above configuration, the intersection part 43 of the squeezing line 41 of the lower layer absorbent body 40 is positioned below the slit 36 of the upper layer absorbent body 30 so that the body fluid diffuses quickly along the squeezed line 41. Become. That is, the intersection part 43 of the pressing line 41 functions as a hub of the body fluid diffusion route. For this reason, the bodily fluid that has flowed down through the slit 36 of the upper layer absorbent body 30 touches the intersection part 43 of the lower layer absorbent body 40 so that the body fluid diffuses widely in the lower layer absorbent body 40 around the intersection point part 43. Become.

  The absorbent article of the present invention may further include one or a plurality of additional absorbers 70 between the backsheet 20 and the lower layer absorber 40. In this case, it is preferable that at least one of the plurality of additional absorbent bodies 70 has a plurality of pressing lines 71 in which the absorbent body is recessed in the thickness direction.

  By further providing the additional absorbent body 70 as in the above configuration, the amount of absorption of the entire absorbent article can be improved. Moreover, liquid diffusibility can be maintained by forming the pressing wire 71 also in the additional absorber 70. FIG.

  According to the present invention, in an absorbent article having an absorbent body in which slits are formed, the diffusibility of bodily fluids directed upward in the vertical direction is increased so that the entire absorbent body can be used even when the wearer is in a standing posture. The body fluid can be absorbed.

Drawing 1 is a top view showing an absorptive article concerning a 1st embodiment. 2 is a cross-sectional view taken along the line II-II shown in FIG. FIG. 3 shows a state where the upper layer absorber and the lower layer absorber of the absorbent article according to the first embodiment are separated. FIG. 4 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the first embodiment are overlapped. FIG. 5 shows a state where the upper layer absorber and the lower layer absorber of the absorbent article according to the second embodiment are separated. Drawing 6 shows the state where the upper layer absorber of the absorptive article concerning a 2nd embodiment and the lower layer absorber were piled up. FIG. 7 is an enlarged view of a pattern of pressing lines formed on the upper layer absorber and the lower layer absorber. FIG. 8 shows a state where the upper layer absorber and the lower layer absorber of the absorbent article according to the third embodiment are separated. FIG. 9 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the third embodiment are overlapped. FIG. 10 is an enlarged view of a pattern of pressing lines formed on the upper layer absorber and the lower layer absorber. FIG. 11 shows a state where the upper layer absorber and the lower layer absorber of the absorbent article according to the fourth embodiment are separated. FIG. 12 shows a state in which the upper layer absorber and the lower layer absorber of the absorbent article according to the fourth embodiment are overlapped. FIG. 13 shows an example of cross-sectional shapes of the upper layer absorber and the lower layer absorber. FIG. 14 shows examples of cross-sectional shapes of the upper layer absorber, the lower layer absorber, and the additional absorber.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.

In the present specification, “A to B” means “A or more and B or less”.
Further, in the present specification, the “longitudinal direction” means a direction in the absorbent article that connects the front body located on the wearer's abdomen side and the back body located on the wearer's back side. The “width direction” means a direction perpendicular to the longitudinal direction of the absorbent article. In FIG. 1 of the present application, the longitudinal direction of the absorbent article is indicated by the Y axis, and the width direction of the absorbent article is indicated by the X axis.
Moreover, in this-application specification, a "skin opposing surface" means the surface which opposes a wearer's skin at the time of wear of an absorbent article. The “non-skin facing surface” means a surface that does not face the wearer's skin when the absorbent article is worn.

[1. First Embodiment]
With reference to FIGS. 1-4, the absorbent article which concerns on the 1st Embodiment of this invention is demonstrated. The absorbent article according to the first embodiment is configured as a large urine collection pad. FIG. 1 is a plan view of the entire absorbent article 100, and FIG. 2 schematically shows a cross-sectional shape taken along the line II-II shown in FIG. In the cross-sectional view of FIG. 2, in order to show the configuration of the absorbent article 100 in an easy-to-understand manner, gaps are drawn between various components, but in reality, there are gaps between the components. Is hardly formed.

  As shown in FIG. 1, the absorbent article 100 includes a front body 1 located on the wearer's abdomen side, a back body 2 located on the wearer's back side, and a crotch 3 located therebetween. And can be divided in the longitudinal direction. Specifically, the absorbent article 100 has a shape that can be expressed as a gourd type or an hourglass type in a plan view. In other words, the absorbent article 100 has a constricted portion at the crotch 3 which is a portion where the lateral width of the absorbent article 100 is the narrowest. On the other hand, the front body 1 and the back body 2 of the absorbent article 100 have side flaps that are portions extending from the constricted portion of the crotch 3 to the left and right outer sides in the width direction. That is, in the portion where the side flaps are formed, the width of the front body 1 and the back body 2 is wider than the width of the constricted portion of the crotch 3. Thus, the absorbent article 100 can be a gourd type (hourglass type). However, the shape of the absorbent article 100 can be changed as appropriate, for example, a simple rectangular shape.

  As shown in FIGS. 1 and 2, the absorbent article 100 basically includes a liquid-permeable top sheet 10, a liquid-impermeable back sheet 20, and a plurality of them interposed therebetween. Absorbers 30 and 40 are provided. In the present specification, the absorber positioned on the top sheet 10 side is referred to as “upper layer absorber 30” (first absorber), and the absorber positioned on the back sheet 20 side is referred to as “lower layer absorber 40” (second absorber). Absorber). As shown in the sectional view of FIG. 2, the upper layer absorber 30 and the lower layer absorber 40 are overlapped in the thickness direction. Moreover, the upper layer absorber 30 and the lower layer absorber 40 are joined using an adhesive such as a hot-melt adhesive so that the relative positions of both do not shift. The top sheet 10 covers the skin facing surface side of the laminated absorbent bodies 30 and 40, and the back sheet 20 covers the skin non-facing surface side of the laminated absorbent bodies 30 and 40. As shown in FIGS. 1 and 2, the top sheet 10 and the back sheet 20 are joined to each other by a hot melt adhesive, heat seal, ultrasonic seal, or the like around each absorber 30, 40. Yes. As a result, the absorbent bodies 30 and 40 are surrounded by the joint between the top sheet 10 and the back sheet 20. In addition, a pair of three-dimensional gathers 50 are formed on both the left and right sides of the absorbent article 100 in the width direction. The pair of three-dimensional gathers 50 stands on both the left and right sides of the absorber, and functions as a leak-proof wall for preventing urine leakage. Furthermore, the absorbent article 100 may include a cover sheet 60 that covers the skin non-facing surface of the back sheet 20. Hereinafter, each member which comprises the absorbent article 100 is demonstrated.

  The top sheet 10 is a sheet-like member that is in direct contact with the skin of the wearer's crotch and allows body fluids such as urine to pass through the absorbers 30 and 40. For this reason, the top sheet 10 is composed of a liquid-permeable material having high flexibility. Examples of the liquid permeable material constituting the top sheet 10 are a woven fabric, a non-woven fabric, or a porous film. Further, for example, a fiber made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which has been subjected to a hydrophilization treatment and further made into a non-woven fabric may be used. Examples of the nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, spunbond nonwoven fabric, and melt blown nonwoven fabric.

  The backsheet 20 is a sheet-like member for preventing body fluid that has passed through the topsheet 10 and is absorbed by the absorbers 30 and 40 from leaking out of the diaper. For this reason, it is preferable that the back sheet 20 is comprised with a liquid-impermeable material. An example of the liquid-impermeable material constituting the backsheet 20 is a liquid-impermeable film made of polyethylene resin. In particular, as the back sheet 20, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to ensure air permeability while maintaining liquid impermeability.

  The absorbers 30 and 40 are members for absorbing body fluid such as urine and holding the absorbed body fluid. The absorbers 30 and 40 are disposed between the liquid-permeable top sheet 10 and the liquid-impermeable back sheet 20. It is preferable that the upper layer absorber 30 and the lower layer absorber 40 are joined by a hot melt adhesive or the like so that the relative positions of each other are not shifted. Each absorber 30 and 40 is comprised by the absorbent material 34 and 44 and the core wrap sheet | seats 35 and 45 which coat | cover it. As the absorptive materials 34 and 44, for example, fluff pulp obtained by pulverizing fiber materials such as conifers and hardwoods, superabsorbent polymer (SAP), and hydrophilic sheets may be used. Moreover, as the absorptive materials 34 and 44, one kind of fluff pulp, a super absorbent polymer, or a hydrophilic sheet may be used alone, or two or more kinds may be used in combination. Generally, the absorptive materials 34 and 44 are comprised by what spread | dispersed the super absorbent polymer in the fluff pulp. The core wrap sheets 35 and 45 are sheet members for holding the shape by covering the absorbent materials 34 and 44. As the core wrap sheets 35 and 45, sheet members having liquid permeability are used. As examples of the core wrap sheets 35 and 45, a thin paper such as tissue paper or a known nonwoven fabric can be used.

  In the present invention, it is preferable that the sizes of the upper absorber 30 and the lower absorber 40 are different. In particular, in the present invention, the length and width of the upper layer absorber 30 are preferably smaller than the length and width of the lower layer absorber 40. In this case, the upper layer absorbent body 30 is arranged on the lower layer absorbent body 40 with the crotch part 3 of the absorbent article 100 as the center. Thereby, the amount of absorption in the crotch part 3 with a large amount of body fluid excretion can be increased. However, the size and shape of the upper layer absorber 30 and the lower layer absorber 40 may be exactly the same.

  The pair of three-dimensional gathers 50 stands on both the left and right sides of the absorber, and serves as a leak-proof wall for preventing urine leakage. The three-dimensional gather 50 is generally constituted by a side sheet 51 and one or a plurality of elastic elastic members 52. In the crotch 3, the side sheet 51 is open at the outer side portion in the width direction to the skin facing surface side of the top sheet 10 and the back sheet 20, and the inner side portion in the width direction is joined. And the one or some elastic elastic member 52 is being fixed to the inner side edge part of the open | released side seat 51 in the expansion | extension state along the longitudinal direction. For this reason, when the elastic expansion / contraction member 52 contracts, the inner end portion of the side sheet 51 rises due to the contraction force of the elastic expansion / contraction member 52, and a crease (gather) is formed at the portion where the elastic expansion / contraction member 52 contracts. As the side sheet 51, for example, a non-woven sheet obtained by a manufacturing method such as card embossing or spunbond can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness and air permeability.

  The cover sheet 60 is a member for reinforcing the back sheet 20 and improving its feel. The cover sheet 60 is bonded to the skin non-facing surface side of the back sheet 20. As the material constituting the cover sheet 60, a woven fabric or a non-woven fabric is used. In particular, it is preferable to use a nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester as a material constituting the cover sheet 60.

  FIGS. 3A and 3B are plan views showing the upper layer absorber 30 and the lower layer absorber 40 separated conceptually and arranged side by side. Moreover, FIG.3 (c) and (d) have shown typically the cross-sectional shape of each absorber 30 and 40 in the III-III line. FIG. 4A shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped, and FIG. 4B schematically shows the cross-sectional shape of the absorber along the line IV-IV. Yes.

  As shown in FIGS. 1 to 4, a slit 36 penetrating in the thickness direction is formed in the upper absorber 30. In the present embodiment, the slit 36 is formed in an elongated and substantially elliptical shape centering on the crotch part 3 of the absorbent article 100 and extending in the longitudinal direction. The slit 36 is formed in a hole shape whose both ends in the longitudinal direction are closed. It is preferable that at least a part of the slit 36 is located in the crotch part 3 of the absorbent article 100, and the slit 36 may extend from the crotch part 3 to the front body 1 and the back view 2 in the longitudinal direction.

  In FIG. 3, the length in the longitudinal direction of the slit 36 is indicated by reference numeral S1, and the length in the width direction (lateral width) is indicated by reference numeral S2. For example, the length S1 of the slit 36 may be set to 20% to 100% or 25% to 80% when the length in the longitudinal direction of the entire upper absorber 30 is 100%. Further, for example, the lateral width S2 of the slit 36 is 10 when the length in the width direction (horizontal width) of the upper layer absorber 30 (the minimum value when there is a wide portion and a narrow portion) is 100%. % To 50% or 15% to 30%. Since the slit 36 has a function of guiding body fluid to the lower layer absorber 40, the lateral width S2 is preferably 5 mm or more.

  In the present embodiment, the upper absorbent body 30 is formed with a plurality of pressing lines 31. A plurality of pressing lines 31 (hereinafter referred to as “upper pressing lines”) of the upper layer absorbent body 30 partially press the upper layer absorbent body 30 from both sides or either one of the skin facing surface side and the skin non-facing surface side. It can be formed by compression. For this reason, in the site | part in which the upper pressing line 31 was formed, the density of the absorptive material 34 in the upper layer absorber 30 will increase. In this embodiment, the upper pressing line 31 is formed by pressing the upper layer absorbent body 30 from the skin facing surface side.

  As the plurality of upper pressing lines 31, a central pressing line 31a positioned at the center in the width direction, a left pressing line 31b positioned on the left side, and a right side are positioned on the front body 1 side and the rear body 2 side, respectively. The right pressing line 31c is provided, and in the example shown in the figure, a total of six pressing lines are formed. The plurality of upper pressing lines 31 have portions extending in the longitudinal direction of the upper layer absorbent body 30. For this reason, the body fluid which touched the upper layer absorber 30 is diffused in the longitudinal direction along each upper pressing line 31. More specifically, the front and rear central squeezing lines 31a each have a linear shape extending along the longitudinal direction, one end of which reaches the longitudinal end edge of the upper absorber 30, and the other end is The slit 36 is reached. Further, the front and rear left compressed lines 31b and the right compressed line 31c connect the linear portion 37a extending from the longitudinal edge of the upper layer absorber 30 toward the crotch 3 and the linear portion 37a and the slit 36. It consists of the inclined part 37b which inclines and extends toward the inner side of the width direction.

  Thus, in this embodiment, the plurality of upper pressing lines 31 are all formed so as to be connected to the slit 36. Thereby, the body fluid excreted from the wearer's crotch is first introduced into the slit 36 and temporarily stored, and then diffuses in the longitudinal direction along each upper squeezing line 31 connected to the slit 36. Thus, since the slit 36 and the upper squeezing line 31 jointly form a plurality of diffusion routes, it becomes possible to absorb bodily fluids in the entire upper-layer absorbent body 30, and the amount of absorption and absorption speed can be improved. Leakage can be prevented more reliably. Further, when the slit 36 and a part of the upper pressing line 31 are connected, the body fluid temporarily accumulated in the slit 36 is easily transmitted through the upper pressing line 31 and diffuses. In particular, since the body fluid can be diffused from the inner wall surface of the slit 36 through the upper pressing line 31, the diffusibility of the body fluid in the upper layer absorbent body 30 can be enhanced. In the present embodiment, the upper absorbent body 30 is not formed with a pressing line extending in the width direction. For this reason, the upper layer absorbent body 30 does not have an intersection of compressed lines.

  A plurality of pressing lines 41 are also formed in the lower layer absorbent body 40. A plurality of pressing lines 41 (hereinafter referred to as “lower pressing lines”) of the lower layer absorbent body 40 partially press the lower layer absorbent body 40 from both sides or either one of the skin facing surface side and the skin non-facing surface side. It is possible to form by compressing. For this reason, in the site | part in which the lower side pressing wire 41 was formed, the density of the absorptive material 44 in the lower layer absorber 40 will increase. In this embodiment, the lower pressing line 41 is formed by pressing the lower layer absorber 40 from the skin facing surface side.

  In the present embodiment, a plurality of lower pressing lines 41 in the lower layer absorbent body 40 are formed so as to extend along the width direction of the absorbent article 100. In the illustrated example, in the lower layer absorbent body 40, linear lower pressing lines 41 extending in the width direction are arranged at regular intervals in the longitudinal direction from the front body to the back. In the present embodiment, the lower absorbent body 40 is not formed with a pressing line extending in the longitudinal direction. For this reason, the lower layer absorbent body 40 does not have an intersection of compressed lines.

  In FIG. 3, the width (width) in the width direction of the lower pressing line 41 is indicated by a symbol W. The lower pressing line 41 is for diffusing body fluid touching the lower layer absorber 40 widely in the width direction of the lower layer absorber 40. Therefore, the width W of the lower pressing line 41 is 100% when the length (width) in the width direction of the lower layer absorber 40 (the minimum value when there is a wide width portion and a narrow width portion) is 100%. , 50% to 100% or 70% to 95%. Moreover, it is preferable that the lateral width W of the lower pressing line 41 exceeds the lateral width S2 of the slit 36 of the upper layer absorbent body 30 (W> S2). Specifically, the width W of the lower pressing line 41 is preferably 110% or more, 150% or more, 200% or more, or 250% or more with respect to the width S2 of the slit 36. The upper limit value of the width W of the lower pressing line 41 with respect to the width S2 of the slit 36 is not particularly limited, but may be, for example, about 10 times.

  FIG. 4 shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped in the thickness direction. As shown in FIG. 4, the lower pressing line 41 of the lower layer absorber 40 overlaps the slit 36 of the upper layer absorber 30. For this reason, when the body fluid is introduced into the slit 36 of the upper layer absorbent body 30, it flows down through the slit 36 and touches the lower pressing line 41 of the lower layer absorbent body 40. Then, the body fluid in contact with the lower layer absorbent body 40 diffuses in the width direction along the lower pressing line 41. In particular, in the present embodiment, as described above, the lateral width W of the lower pressing wire 41 exceeds the lateral width S2 of the slit 36. For this reason, the bodily fluid contacting the lower layer absorber 40 through the slit 36 diffuses outward in the width direction along the lower pressing line 41 and enters the gap between the upper layer absorber 30 and the lower layer absorber 40. As a result, the body fluid can be absorbed also on the back surface side (the non-skin facing surface side) of the upper layer absorbent body 30. For this reason, body fluid can be absorbed rapidly and the amount of absorption can be improved.

  Furthermore, the slit 36 of the upper-layer absorbent body 30 has no ability to suck up body fluid vertically from the crotch 3 to the front body 1 side or the back body side 2 when the wearer is in a standing position, for example. The upper squeezing line 31 and the lower squeezing line 41 have the ability to suck up body fluid vertically. For this reason, the upper squeezing line 31 is connected to the slit 36 of the upper layer absorbent body 30, or the lower squeezing line 41 is provided below the slit 36, thereby sucking up the body fluid temporarily accumulated in the slit 36 upward in the vertical direction. Thus, it is possible to diffuse widely to the front body 1 side and the back body 2 side.

  Here, in order to understand the technique of the present invention, the principle of absorption of body fluid by pressing lines will be specifically described. When the body fluid is absorbed, the absorbent body causes the first diffusion phenomenon where the body fluid flows through the groove of the squeezing line and the density around the squeezing line is higher than the density other than the squeezing line, so that the capillary phenomenon occurs and the liquid Both of the second diffusion phenomena that occur along the squeezing line occur simultaneously. The first diffusion phenomenon is dynamic diffusion and the diffusion speed in the plane is fast, but the effect of sucking up the body fluid in the vertical direction cannot be expected. On the other hand, the second diffusion phenomenon due to the capillary phenomenon around the squeezing line has a smaller amount of liquid to diffuse than the first diffusion phenomenon, but is expected to have the effect of sucking and diffusing body fluid vertically along the squeezing line it can. Thus, the squeezing line formed on the absorbent body has the ability to suck up body fluid vertically upward. Here, the situation where the body fluid is sucked up vertically corresponds to the situation where the urine collected in the crotch in the standing posture is sucked up into the front body and the back body.

  In the case of a large-format urine collection pad, the total length of the absorber is long and the distance from the excretion position to the end is long. If the urine is partially sucked only by the urination part, it will cause the urine leakage due to repeated urination without using the whole absorber. Therefore, a large-format urine collection pad is required to absorb a larger amount of urine by using the absorber to the end. However, large urine collection pads are required not only to have a high total absorption, but also to have a high absorption rate. This is because the wearer can obtain a comfortable wearing feeling immediately after urination. In general, a thick absorber is often made by stacking two or more absorbers, and in this case, a technique is known in which a slit is provided in the upper absorber in order to increase the absorption speed. In addition, a technique for further improving the diffusibility by providing a slit in the lower absorber at the same position as the upper absorber is also known. However, such a slit has an effect such as making a passage through which the body fluid flows or temporarily storing the body fluid in the slit, but the effect of diffusing the body fluid in the flow destination is low. Therefore, in the present invention, the slit 36 is formed in the upper layer absorber 30 to increase the diffusion rate and the amount of water, and the lower pressing line 41 is formed in the lower layer absorber 40 to diffuse the body fluid using the capillary phenomenon. By accelerating, the body fluid is allowed to permeate a wide range of the absorbent bodies 30 and 40.

  As described above, the present invention uses the merits of both the slit 36 of the upper absorbent body 30 and the lower pressing line 41 of the lower absorbent body 40 to increase the diffusion rate, diffusion amount, and diffusion range of body fluid. . For this reason, it is preferable not to form a slit in the range which overlaps the slit 36 of the upper layer absorber 30 among the lower layer absorbers 40 at least. If a slit is also formed in the lower layer absorber 40 at a position overlapping the slit 36 of the upper layer absorber 30, the liquid diffusion effect by the lower pressing line 41 of the lower layer absorber 40 may not be effectively used. However, the present invention does not exclude a form in which a slit is formed in the lower layer absorber 40.

  Furthermore, as FIG. 4 shows, in the state which accumulated the upper layer absorber 30 and the lower layer absorber 40, the upper side compression line 31 and the lower side compression line 41 cross | intersect at least partially seeing from the plane direction. “Viewed from the plane direction” means viewed from the direction facing the top sheet 10 or the back sheet 20. Thus, by arranging the absorbent bodies 30 and 40 so as to cross the compression lines 31 and 41, the body fluid is effectively infiltrated into a region where the compression line is not formed (non-compression region). It becomes possible. That is, the body fluid diffused along the squeezing line of one absorbent body is easily absorbed by the non-compressed region of the other absorbent body. For this reason, the bodily fluid which spread | diffused along the pressing line of one absorber becomes difficult to reach an edge part, and the situation which leaks outside can be prevented effectively. In addition, since the body fluid can be absorbed in a wide range of the two-layer absorbers 30 and 40, the amount of body fluid absorbed is improved, and it is difficult for the wearer to feel uncomfortable even when worn for a long time. . Furthermore, by forming the pressing lines 31 and 41 on the two layers of the absorbers 30 and 40, it is not necessary to form the pressing lines densely on each absorber. For this reason, it can avoid that the touch of each absorber becomes hard.

  Here, the thickness of each absorber 30, 40, that is, the thickness of the non-compressed region is preferably, for example, 5 mm to 20 mm, and particularly preferably 8 mm to 15 mm. Moreover, it is preferable that the thickness of each absorber 30 and 40 in the site | part in which the pressing lines 31 and 41 were formed is 1 mm-10 mm, and it is especially preferable that they are 2 mm-5 mm. However, as a matter of course, the thickness of the portion where the pressing lines 31 and 41 are formed is smaller than the thickness of the non-squeezing region. For example, the thickness of the site | part in which the pressing lines 31 and 41 were formed is 3 to 50% with respect to the thickness of a non-pressing area | region, and it is preferable that it is especially 5% to 20%. Moreover, it is preferable that the width | variety of each pressing wire 31 and 41 is 1 mm-5 mm, and it is preferable that it is especially 2 mm-4 mm.

  In addition, in the figure of this application, the example in which the pressing lines 31 and 41 were formed by denting both the absorptive material 34 and 44 and the core wrap sheets 35 and 45 which comprise each absorber 30 and 40 is shown. Yes. However, the pressing lines 31 and 41 should just be formed by compressing at least the absorptive material 34 and 44 and making it dent. That is, after compressing the absorptive materials 34 and 44 and forming the pressing lines 31 and 41, it is good also as joining the core wrap sheets 35 and 45 so that the absorptive material 34 and 44 may be coat | covered. In this sense, it is sufficient that the squeezing lines 31 and 41 are formed on the absorbent materials 34 and 44 constituting the respective absorbent bodies 30 and 40.

[2. Second Embodiment]
Then, with reference to FIGS. 5-7, the absorbent article which concerns on the 2nd Embodiment of this invention is demonstrated. In the second embodiment, description of the same configuration as that of the first embodiment will be omitted, and description will be made centering on a configuration different from that of the first embodiment.

  FIGS. 5A and 5B are plan views showing the upper absorber 30 and the lower absorber 40 separated conceptually and arranged side by side. 5C and 5D schematically show the cross-sectional shapes of the absorbers 30 and 40 along the line V-V. Moreover, Fig.6 (a) has shown the state which accumulated the upper layer absorber 30 and the lower layer absorber 40, and FIG.6 (b) showed typically the cross-sectional shape of the absorber in a VI-VI line. Yes. Furthermore, FIG. 7 expands and shows the pattern of the pressing line 31 formed in the upper layer absorber 30 and the pattern of the pressing line 41 formed in the lower layer absorber 40. 5 and 6 conceptually show only the upper layer absorber 30 and the lower layer absorber 40 extracted. Although not shown in FIGS. 5 and 6, the second embodiment described here also includes at least a top sheet 10 and a back sheet 20, as in the first embodiment described above. Further, a pair of three-dimensional gathers 50 and a cover sheet 60 may be provided.

  As shown in FIG. 5, the present invention is characterized by the pattern of the upper pressing line 31 formed on the upper absorbent body 30 and the pattern of the lower pressing line 41 formed on the lower absorbent body 40. . The pressing lines 31 and 41 formed on the absorbent bodies 30 and 40 form a pattern that intersects with each other at least partially when viewed from the plane direction. Below, the pattern of each pressing line 31 and 41 is demonstrated in detail.

  As shown in FIG. 5, upper pressing lines 31 are formed in the upper layer absorbent body 30 in a square lattice pattern. Here, the “square grid pattern” means that a plurality of squeezing lines extending in parallel with the longitudinal direction intersect with a plurality of squeezing lines extending in parallel with the width direction to define a square non-squeezed region. A pattern. In particular, in the present embodiment, the pattern of the upper pressing line 31 is a regular pattern (a square lattice pattern) in which the non-squeezing regions 32 surrounded on all sides by the pressing line 31 are all square. Thus, the upper layer absorbent body 30 includes a plurality of upper pressing lines 31, a non-squeezing region 32 surrounded by the upper pressing lines 31 (hereinafter referred to as “upper non-squeezing region”), and an upper pressing line 31. It can be considered that an intersecting intersection 33 (hereinafter referred to as “upper intersection”) is formed.

  On the other hand, the lower pressing line 41 is formed in the lower layer absorbent body 40 in a rhombic lattice pattern. Here, the “rhombic grid pattern” is a pattern in which a plurality of squeezing lines extending in a direction inclined with respect to the longitudinal direction and the width direction intersect to define a rhombic (diamond) non-squeezed region. Say. In particular, in the present embodiment, the pattern of the lower squeezing line 41 is a regular pattern in which all the non-squeezed areas 42 surrounded by the lower squeezing line 41 are orthorhombic (rhombic). (Lattice pattern). Thus, also in the lower layer absorbent body 40, a plurality of lower pressing lines 41, a non-squeezing area 42 surrounded by the lower pressing lines 41 (hereinafter referred to as “lower non-squeezing area”), and a lower side It can be considered that an intersection part 43 (hereinafter referred to as “lower intersection part”) where the pressing lines 41 intersect is formed.

  Moreover, in this embodiment, the upper pressing line 31 is formed by compressing and denting the upper layer absorber 30 from the skin facing surface side. Similarly, the lower pressing line 41 is formed by compressing and recessing the lower layer absorbent body 40 from the skin facing surface side. For this reason, a gap will be formed between the upper layer absorbent body 30 and the lower layer absorbent body 40 in a portion where the lower pressing line 41 is formed in the lower layer absorbent body 40.

  FIG.6 and FIG.7 has shown the state which accumulated the pattern of the upper side compression line 31 of square grid | lattice form, and the pattern of the lower compression line 41 of orthorhombic grid | lattice form. As can be seen from each drawing, in the present embodiment, the area of the upper non-squeezed region 32 is larger than the area of the lower non-squeezed region 42. For this reason, when the upper layer absorber 30 and the lower layer absorber 40 are overlapped, the lower non-squeezed region 42 (the orthorhombic rectangular shape) is accommodated in the range of the upper non-squeezed region 32 (square).

  Moreover, in this embodiment, four lower side intersections that define a certain lower non-squeezed region 42 (an orthorhombic rectangle) on each of the four upper compressed lines 31 that define a certain upper non-squeezed region 32 (square). The part 43 has overlapped. For this reason, as FIG.6 and FIG.7 shows, it turns out that the lower side non-pressing area | region 42 (rhombic square) fits in the range of the upper side non-pressing area | region 32 (square). That is, the center of the upper non-squeezed region 32 (square) (intersection of diagonal lines) and the center of the lower non-squeezed region 42 (rectangular rectangle) (intersection of diagonal lines) coincide. Furthermore, as shown in FIG. 5, the length L in the longitudinal direction of the upper non-squeezed region 32 (square) is the length D1 of the diagonal line along the longitudinal direction of the lower non-squeezed region 42 (rhombus). Almost equal (L = D1). Further, the length B in the width direction of the upper non-squeezed region 32 (square) is substantially equal to the length D2 of the diagonal along the width direction of the lower non-squeezed region 42 (B = D2). Note that “almost” in this specification means that an error of ± 5% is allowed. By satisfying these conditions, four lower intersections defining a certain lower non-squeezed region 42 (rhombic square) on each of the four upper compressed lines 31 defining the upper non-squeezed region 32 (square). The part 43 will overlap.

  Moreover, as FIG.6 and FIG.7 shows, the upper side intersection part 33 has overlapped with the center (intersection of a diagonal line) of the lower non-pressing area | region 42 (rhombus square), respectively. From another point of view, there are a plurality of lower non-compressed regions 42 (rectangular squares) that overlap with the upper intersection 33 and those that do not overlap with the upper intersection 33. In the example shown in FIG.6 and FIG.7, the row | line | column of the upper intersection part 33 and the row | line | column which the upper intersection part 33 does not overlap are alternated every other row among the several row | line | columns of the lower non-pressing area | region 42. You can see that they are lined up. Similarly, it can be seen that among the plurality of rows of the lower non-squeezed region 42, every other row includes rows in which the upper intersection portion 33 overlaps and rows in which the upper intersection portion 33 does not overlap.

  As described above, by forming the pattern of the upper squeezing line 31 (square grid shape) and the pattern of the lower squeezing line 41 (rhombic rectangular grid shape), the compression line is not formed densely in one absorber. However, the body fluid can be effectively diffused in the non-compressed region, and the body fluid can be absorbed in a wide range of the entire two-layer absorber. That is, the body fluid diffused along the upper pressing line 31 of the upper layer absorbent body 30 is absorbed by the lower non-pressed region 42 of the lower layer absorbent body 40. For this reason, the bodily fluid which spread | diffused along the upper side compression line 31 of the upper layer absorber 30 becomes difficult to reach an edge part, and the situation which leaks outside can be prevented effectively. In addition, since the body fluid can be absorbed in a wide range of the two-layer absorbers 30 and 40, the amount of body fluid absorbed is improved, and it is difficult for the wearer to feel uncomfortable even when worn for a long time. . Since the squeezing lines 31 and 41 intersect at the intersections 33 and 43 formed in the absorbent bodies 30 and 40, the body fluid tends to stay. Therefore, the body fluid staying at the upper intersection 33 is effectively infiltrated into the lower non-compressed region 42 by overlapping the upper intersection 33 of the upper absorbent body 30 on the lower non-compressed region 42 of the lower absorbent 40. Is possible.

  Moreover, the body fluid which has penetrated into the upper-layer absorbent body 30 is further distant by setting the columns and rows of the lower non-compressed region 42 where the upper intersecting point portion 33 overlaps every other column and every other row as in this embodiment. It is possible to diffuse to the region. For this reason, the body fluid that has permeated the upper layer absorber 30 can be diffused and permeated over a wide area of the lower layer absorber 40.

  Moreover, a pressing line has the function to flow a liquid as a groove | channel, and the function to diffuse a liquid along a pressing part using a capillary phenomenon to the non-squeezing area | region around a pressing part. Even when used in a form that does not function as a groove, the liquid is transferred from the squeezing line of one absorbent body to the squeezing line or non-squeezed region of the other absorbent body. The reason is as follows. That is, the squeezing line is obtained by crushing the absorbent material constituting the absorbent body with pressure. For this reason, when an absorber absorbs a liquid in the site | part in which the pressing line was formed, thickness will change. That is, when the pulp or SAP in the pressing line absorbs liquid, the interval between the pulps is loosened over time and the SAP swells, so that the pressing line gradually becomes shallower, and finally the non-squeezed region after swelling The thickness is almost the same. In this way, even if the squeezed line has a depth before absorption, the depth gradually decreases as the liquid absorption proceeds. For this reason, it becomes easy to deliver a liquid from the pressing line of one absorber to the pressing line or non-pressing area | region provided in the other absorber which overlaps it. That is, since the squeezing line is a groove in the initial state, the liquid flows in preference to the squeezing line. And since the pressing line swells as the liquid absorption proceeds in the portion where the pressing line is formed, as described above, the liquid is applied to the pressing line or the non-squeezing region provided on the other absorbent body overlapping the swollen pressing line. Moving.

  Here, the width of each pressing wire 31, 41 is preferably 1 mm to 5 mm, and particularly preferably 2 mm to 4 mm. Further, the length L of the upper non-squeezed region 32 shown in FIG. 5 is preferably 10 mm to 50 mm, and particularly preferably 20 mm to 40 mm, or 30 mm. A preferable numerical range of the width B of the upper non-compressed region 32 is the same as the length L described above. The length L and the width B are preferably substantially equal, but may be different. That is, the shape of the upper non-squeezed region 32 is not limited to a square, but may be another square. Moreover, it is preferable that the length D1 of the diagonal in the longitudinal direction of the lower non-pressing area | region 42 shown in FIG. 5 is 10 mm-50 mm, and it is especially preferable that it is 20 mm-40 mm, or 30 mm. A preferable numerical range of the length D2 of the diagonal line in the width direction of the lower non-compressed region 42 is the same as the length D1 described above. The length D1 and the length D2 are preferably substantially equal, but may be different. In other words, the shape of the lower non-squeezed region 42 is not limited to an orthorhombic shape (regular rhombus), and may be other rhombuses. Further, as described above, it is preferable that the length L and the length D1 are substantially equal, and the width B and the length D2 are substantially equal, but the present invention is not limited to this.

  Moreover, the pressing lines 31 and 41 formed in the absorbent bodies 30 and 40 have a wide range in the longitudinal direction so that the body fluid discharged in the vicinity of the crotch can be diffused widely to the front body and the back body. It is preferable to be formed. Specifically, the length in the longitudinal direction of the region where the pressing lines 31 and 41 are formed is preferably 60% or more with respect to the length in the longitudinal direction of each absorbent body 30 and 40, 60% to Particularly preferred is 100%, 70% to 100%, or 80% to 100%. Moreover, the pressing lines 31 and 41 formed in the absorbent bodies 30 and 40 have a wide range in the width direction so that the body fluid discharged in the vicinity of the center in the width direction can be widely diffused outward in the width direction. It is preferable to be formed. Specifically, it is preferable that the maximum width in the width direction of the region where the pressing lines 31 and 41 are formed is 60% or more with respect to the minimum width in the width direction of the absorbent bodies 30 and 40. Particularly preferred is 100%, 70% to 100%, or 80% to 100%.

  In addition to the above configuration, as shown in FIG. 5, a slit 36 is formed in the upper absorber 30. The slit 36 is formed in an elongated elliptical shape extending in the longitudinal direction with the crotch 3 of the absorbent article 100 as the center. The slit 36 has a hole shape in which both ends in the longitudinal direction are closed. The slit 36 is formed in the pattern of the square grid-like upper pressing lines 31, and is connected to the plurality of upper pressing lines 31. More specifically, linear upper pressing lines 31 extending along the longitudinal direction of the absorbent article are connected to both ends of the slit 36 in the longitudinal direction. Moreover, the linear upper pressing line 31 extended along the width direction of an absorbent article is connected with the left-right both ends part of the width direction of the slit 36. As shown in FIG. For this reason, the body fluid accumulated in the slit 36 diffuses in the longitudinal direction and the width direction of the absorbent article along the upper pressing line 31.

  In addition, as shown in FIG. 6, in the state where the upper layer absorber 30 and the lower layer absorber 40 are stacked and joined, the slit 36 of the upper layer absorber 30 has a plurality of lower pressing lines 41 of the lower layer absorber 40. It can be seen that a plurality of lower non-squeezed regions 42 and a plurality of lower intersection points 43 overlap. First, since the slit 36 and the lower pressing line 41 overlap, the body fluid accumulated in the slit 36 diffuses along the lower pressing line 41. Further, since the slit 36 and the lower non-squeezed region 42 overlap, the body fluid accumulated in the slit 36 can be directly absorbed by the lower non-squeezed region 42. Further, the lower intersection portion 43 functions as a body fluid diffusion route hub. For this reason, since the slit 36 and the lower intersection portion 43 overlap each other, the body fluid diffuses widely in the lower layer absorber 40 around the lower intersection portion 43.

  Moreover, in this embodiment, the lower side pressing line 41 which overlaps with the slit 36 of the upper layer absorber 30 is extended in the direction (namely, diagonal direction) inclined with respect to both the longitudinal direction and width direction of an absorbent article. For this reason, the bodily fluid contacting the lower pressing line 41 through the slit 36 diffuses in an oblique direction along the lower pressing line 41.

  In this embodiment, the upper squeezing line 31 is formed in a square lattice pattern in which the area of the non-squeezed area is relatively large, and the lower squeezing line 41 is a positive line in which the area of the non-squeezed area is relatively small. An example in which a rhombic lattice pattern is formed has been described. However, the pattern of this pressing line can be replaced with the upper pressing line 31 and the lower pressing line 41. That is, it is also possible to apply the above-described square grid pattern as the pattern of the lower pressing line 41 and apply the orthorhombic grid pattern as the pattern of the upper pressing line 31.

[3. Third Embodiment]
Then, with reference to FIGS. 8-10, the absorbent article which concerns on the 3rd Embodiment of this invention is demonstrated. In the third embodiment, the description of the same configurations as those of the first embodiment and the second embodiment described above will be omitted, and description will be made focusing on configurations different from those embodiments.

  8 (a) and 8 (b) show the upper absorber 30 and the lower absorber 40 separately, and FIGS. 8 (c) and 8 (d) show the cross-sectional shapes in VIII-VIII. . Fig.9 (a) shows the state which accumulated the upper layer absorber 30 and the lower layer absorber 40, and FIG.9 (b) has shown the cross-sectional shape in IX-IX. Moreover, FIG. 10 expands and shows the pattern of the pressing line 31 formed in the upper layer absorber 30, and the pattern of the pressing line 41 formed in the lower layer absorber 40. FIG. Although not shown in FIGS. 8 and 9, the third embodiment described here also includes at least a top sheet 10 and a back sheet 20 as in the first embodiment described above. In addition, a pair of three-dimensional gathers 50 and a cover sheet 60 may be provided.

  The third embodiment is different from the second embodiment in the pattern of the pressing lines 31 and 41 formed on the absorbent bodies 30 and 40, respectively. As shown in FIG. 8 to FIG. 10, the upper pressing line 31 is formed in an orthorhombic grid pattern on the upper layer absorber 30, and the lower pressing line 41 is square on the lower layer absorber 40. It is formed in a lattice pattern. Here, the orthorhombic grid pattern and the square grid pattern are basically the same as those described in the second embodiment. However, in the third embodiment, an orthorhombic grid pattern formed on the upper absorber 30 and a square formed on the lower absorber 40 in a state where the upper absorber 30 and the lower absorber 40 are overlapped. The relative positional relationship of the grid pattern is different from that of the second embodiment.

  As shown in FIG. 9 and FIG. 10, in the third embodiment, the upper intersection 33 of the upper absorber 30 and the lower intersection 43 of the lower absorber 40 in a state where the absorbers 30 and 40 are stacked. And overlap. Further, among the plurality of upper intersection portions 33 in the upper layer absorbent body 30, there are those that overlap with the center (intersection of diagonal lines) of the lower non-squeezed region 42 of the lower layer absorbent body 40. In particular, in the range where the pattern of the upper pressing line 31 of the upper layer absorbent body 30 and the pattern of the lower pressing line 41 of the lower layer absorbent body 40 overlap, all the lower non-squeezed regions except the part where the slits 36 are formed. The upper intersection part 33 exists within the range of 42. For this reason, in 3rd Embodiment, it turns out that the upper pressing line 31 has overlapped in the position corresponded to the diagonal of the lower non-pressing area | region 42 which makes | forms square shape except the site | part in which the slit 36 was formed. Furthermore, in 3rd Embodiment, it turns out that the lower pressing line 41 has overlapped in the range of the upper non-pressing area | region 32. FIG.

  Thus, in 3rd Embodiment, the lower pressing line 41 overlaps in the range of the upper non-pressing area | region 32, the upper pressing line 31 and the upper intersection part 33 overlap in the range of the lower non-pressing area | region 42, In addition, the upper intersection 33 and the lower intersection 43 overlap each other. Therefore, the body fluid diffused along the upper pressing line 31 of the upper layer absorbent body 30 falls on the lower layer absorbent body 40 and is absorbed by the lower non-pressed region 42. Further, the body fluid staying at the upper intersection portion 33 of the upper layer absorber 30 falls to the lower layer absorber 40 and diffuses along the lower pressing line 41 through the lower intersection portion 43. Furthermore, the body fluid diffused along the lower pressing line 41 of the lower layer absorbent body 40 is absorbed by the upper non-pressed region 32 of the upper layer absorbent body 30. The lower pressing line 41 can also diffuse body fluid in the diagonal direction of the lattice pattern of the upper pressing line 31. Thus, by forming such a pattern, it is possible to quickly guide the body fluid to the non-squeezed areas 32 and 42 that have been conventionally considered to have a slow absorption time.

  Thus, it can be said that the pattern of the third embodiment has a faster body fluid absorption rate than the pattern of the second embodiment. In contrast, it can be said that the pattern of the second embodiment has a wider diffusion range of body fluids than the pattern of the third embodiment. Which of the pattern of the second embodiment and the pattern of the third embodiment is adopted may be appropriately determined in consideration of the performance required for the absorbent article.

  Further, as shown in FIG. 9, in the state where the upper layer absorber 30 and the lower layer absorber 40 are laminated and joined, the slit 36 of the upper layer absorber 30 has a plurality of lower pressing lines 41 of the lower layer absorber 40. It can also be seen that the plurality of lower non-squeezed regions 42 overlap. In the third embodiment, the lower pressing line 41 that overlaps the slit 36 extends along the width direction of the absorbent article. For this reason, the bodily fluid contacting the lower pressing line 41 through the slit 36 diffuses in an oblique direction along the lower pressing line 41.

[4. Fourth Embodiment]
Then, with reference to FIG.11 and FIG.12, the absorbent article which concerns on the 4th Embodiment of this invention is demonstrated. In the fourth embodiment, description of the same configuration as that of the above-described embodiment will be omitted, and description will be made centering on a configuration different from these embodiments. 11 (a) and 11 (b) separately show the upper absorber 30 and the lower absorber 40, and FIGS. 11 (c) and 11 (d) show the cross-sectional shapes in XI-XI. . FIG. 12A shows a state in which the upper layer absorber 30 and the lower layer absorber 40 are overlapped, and FIG. 12B shows a cross-sectional shape at XII-XII.

  As shown in FIG. 11, in the fourth embodiment, the upper layer absorber 30 is formed with slits 36 for dividing the upper layer absorber 30 along the longitudinal direction. Thus, the slit 36 may be formed from one end to the other end in the longitudinal direction of the upper layer absorber 30. Moreover, in this embodiment, the upper layer absorber 30 is not formed with a pressing line, and only the lower layer absorber 40 is formed with a plurality of pressing lines 41 having a rhombic lattice pattern. In addition, the pattern of the pressing line 41 formed in the lower layer absorber 40 is the same as the pattern shown in FIG.

  As shown in FIG. 12, in a state where the upper layer absorber 30 and the lower layer absorber 40 are overlapped, a plurality of lower pressing lines 41 of the lower layer absorber 40, a plurality of lower sides are formed in the slit 36 of the upper layer absorber 30. It can be seen that the non-compressed area 42 and the plurality of lower intersection portions 43 overlap. The lower pressing line 41 overlapping the slit 36 extends in a direction (that is, an oblique direction) inclined with respect to both the longitudinal direction and the width direction of the absorbent article. For this reason, the bodily fluid contacting the lower pressing line 41 through the slit 36 diffuses in an oblique direction along the lower pressing line 41.

[4. Example of cross-sectional shape of absorber]
In the 1st to 4th embodiment mentioned above, the example which forms pressing line 31 and 41 which dented the skin opposing surface side of upper layer absorber 30 and lower layer absorber 40 was explained. However, the present invention is not limited to this. Hereinafter, another example of the cross-sectional shape of each absorber will be described.

  FIG. 13 shows an example of cross-sectional shapes of the upper layer absorber 30 and the lower layer absorber 40. In the example shown in FIG. 13 (a), the squeezing line 31 of the upper layer absorbent body 30 is a depression on the skin non-opposing surface side, and the squeezing line 41 of the lower layer absorbent body 40 is the skin facing surface. The side is recessed. For this reason, the upper layer absorber 30 and the lower layer absorber 40 are formed with squeezed lines 31 and 41 on opposite surfaces. By doing in this way, a clearance gap arises between the upper layer absorber 30 or the lower layer absorber 40 in the site | part in which the pressing lines 31 and 41 were formed. Thereby, the body fluid that has flowed down from the upper layer absorber 30 to the lower layer absorber 40 diffuses over a wide area of the lower layer absorber 40.

  In the example shown in FIG. 13 (b), the squeezing line 31 of the upper layer absorbent body 30 is formed by recessing both the skin facing surface side and the skin non-facing surface side. The line 41 is formed by recessing only the skin facing surface side. Thus, the upper layer absorber 30 and the lower layer absorption are maintained while maintaining the diffusibility of the body fluid on the surface of the upper layer absorber 30 by recessing both the skin facing surface side and the non-skin facing surface of the upper layer absorber 30. More gaps between the bodies 40 can be secured. For this reason, body fluid can be diffused in a wide range of both the upper layer absorber 30 and the lower layer absorber 40.

  In the example shown in FIG. 13 (c), the squeezing line 31 of the upper layer absorber 30 has both the skin facing surface side and the skin non-facing surface side depressed, and the lower layer absorber 40 The pressing line 41 also has both the skin facing surface side and the skin non-facing surface side recessed. As a result, as in the example shown in FIG. 13B, more clearance is secured between the upper absorber 30 and the lower absorber 40 while maintaining the diffusibility of the body fluid on the surface of the upper absorber 30. it can. Further, by denting both the skin facing surface side and the skin non-facing surface side of the lower layer absorbent body 40, while maintaining the diffusibility on the surface of the lower layer absorbent body 40, the body fluid is also applied to the back surface side of the lower layer absorbent body 40. Can be efficiently infiltrated. That is, the back sheet 20 (see FIG. 2) is disposed on the back side of the lower layer absorber 40. Then, by providing a gap between the lower layer absorbent body 40 and the back sheet 20, the body fluid reaching the back sheet 20 is further diffused through the pressing line 41 of the lower layer absorbent body 40 and absorbed on the back side of the lower layer absorbent body 40. Is done. Thereby, a bodily fluid can be absorbed by the whole upper layer absorber 30 and lower layer absorber 40.

  In the example shown in FIG. 13 (d), the squeezing line 31 of the upper layer absorbent body 30 is a depression of the skin facing surface side, and the squeezing line 41 of the lower layer absorbent body 40 is a non-skin facing surface. The side is recessed. For this reason, the upper layer absorber 30 and the lower layer absorber 40 are joined with almost no gap. Thus, it is also possible to join so as not to create a gap between the upper layer absorber 30 and the lower layer absorber 40.

  FIG. 14 shows an example of an absorbent article further including an additional absorber 70 (third absorber) in addition to the upper layer absorber 30 and the lower layer absorber 40. In the example of FIG. 14, the additional absorbent body 70 is disposed on the non-skin facing surface side of the lower layer absorbent body 40, that is, between the lower layer absorbent body 40 and the back sheet 20 (see FIG. 2). Note that the number of additional absorbers 70 positioned below the lower layer absorber 40 is not limited to one, and may be two or more. The additional absorbent body 70 preferably has a plurality of squeezed wires 71 as with the upper layer absorbent body 30 and the lower layer absorbent body 40. As shown in FIG. 14, the pressing line 71 may be one in which the skin facing surface side of the additional absorbent body 70 is recessed, or the skin non-facing surface side of the additional absorbent body 70 is recessed. There may be. Although the pattern of the pressing line 71 of the additional absorber 70 is not specifically limited, The pattern of the pressing line demonstrated in the above-mentioned embodiment is applicable suitably.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  For example, the pressing line extending in one direction of the longitudinal direction or the width direction described in the first embodiment and the pressing line forming the lattice-like pattern described in the second embodiment and the third embodiment may be combined. Is possible. That is, of the two laminated absorbent bodies, one absorbent body has a plurality of non-squeezed areas surrounded by a squeezing line, and the other absorbent body extends in the longitudinal direction or the width direction. It can also have a plurality of pressing lines. For example, the upper absorbent body 30 is formed with a square grid-like compressed line shown in FIG. 5A, and the lower absorbent body 40 is extended with a plurality of compressed lines extending along the width direction shown in FIG. 3B. Can be formed and vice versa. Further, for example, a plurality of squeezing lines extending along the longitudinal direction shown in FIG. 3A are formed on the upper layer absorber 30, and the rhombic lattice shape shown in FIG. 5B is formed on the lower layer absorber 40. Squeezing lines can be formed and vice versa.

  In the specification of the present application, the case where the absorbent article according to the present invention is a urine collecting pad has been described as an example. However, the present invention is not limited to this, and a pants-type disposable diaper or a tape-type disposable is used. It is also applicable to diapers or sanitary napkins.

  The present invention relates to an absorbent article such as a urine collection pad and a disposable diaper. Therefore, the present invention can be suitably used in the manufacturing industry for absorbent articles and the like.

DESCRIPTION OF SYMBOLS 10 ... Top sheet 20 ... Back sheet 30 ... Upper layer absorber 31 ... Upper pressing line 31a ... Center pressing line 31b ... Left pressing line 31c ... Right pressing line 32 ... Upper non-squeezing area 33 ... Upper intersection part 34 ... Absorbing material 35 ... Core wrap sheet 36 ... Slit 37a ... Straight part 37b ... Inclined part 40 ... Lower layer absorbent body 41 ... Lower pressing line 42 ... Lower non-squeezing region 43 ... Lower intersection point 44 ... Absorptive material 45 ... Core wrap sheet 50 ... Three-dimensional gather 51 ... Side sheet 52 ... Elastic elastic member 60 ... Cover sheet 70 ... Additional absorber 71 ... Squeeze line 100 ... Absorbent article

Claims (8)

A liquid-permeable top sheet (10), a back sheet (20), and at least two absorbers (30, 40) arranged between the top sheet (10) and the back sheet (20). And an absorbent article comprising:
The two absorbers are an upper layer absorber (30) located on the top sheet (10) side and a lower layer absorber (40) located on the back sheet (20) side,
The upper layer absorber (30) has one or a plurality of slits (36) penetrating in the thickness direction of the absorber,
The said lower layer absorber (40) has the some pressing line (41) in which the said absorber became depressed in the thickness direction Absorbent article. The absorbent article according to claim 1, wherein the slit (36) of the upper layer absorbent body (30) overlaps at least a part of the pressing line (41) of the lower layer absorbent body (40). The slit (36) of the upper layer absorbent body (30) extends in the longitudinal direction of the absorbent article,
The slit (36) is a pressing line extending along the width direction of the absorbent article among the pressing lines (41) of the lower layer absorbent body (40), or along a direction inclined with respect to the longitudinal direction. The absorptive article according to claim 2. It overlaps with a pressing line which extends. The absorptive article according to claim 3. The upper layer absorber (30) has a plurality of pressing lines (31) in which the absorber was depressed in the thickness direction. The absorbent article according to claim 4, wherein the plurality of pressing lines (31) of the upper layer absorbent body (30) include those connected to the slit (36). The lower layer absorber (40) has a non-squeezed region (42) surrounded by the pressing line (41),
The absorbent article according to claim 1, wherein the slit (36) of the upper-layer absorbent body (30) overlaps at least a part of the non-compressed region (42) of the lower-layer absorbent body (40). The lower layer absorbent body (40) has an intersection (43) where the pressing lines (41) intersect,
The absorptive article according to claim 1. The slit (36) of the upper layer absorber (30) overlaps with the intersection (43) of the lower layer absorber (40). One or more additional absorbers (70) are further provided between the backsheet (20) and the lower layer absorber (40),
The absorbent article according to claim 1, wherein at least one of the plurality of additional absorbent bodies (70) has a plurality of pressing lines (71) in which the absorbent body is recessed in the thickness direction.

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