RU2734587C2 - Absorbing pad - Google Patents

Abstract

FIELD: meeting human vital needs; hygiene.SUBSTANCE: objective of present invention consists in creation of absorbing liner, in which in the absorbing member there are extruded lines providing effective diffusion of biological liquids in an unpressurised portion and absorption of biological fluid over a large area without the need to form tightly squeezed extruded lines. Providing an absorbent article, comprising: a liquid-permeable top sheet (10); back sheet (20); and at least two absorbing elements (30, 40) laid in layers and located between upper sheet (10) and rear sheet (20). Each of two absorbing elements (30, 40) includes several extruded lines (31, 41), in which absorbing elements are recessed in direction of thickness. Extruded lines (31, 41) of two absorbing elements intersect at least partially in plan.EFFECT: disclosed is absorbing liner.14 cl, 26 dwg

Description

The technical field to which the invention relates

[0001]

The present invention relates to an absorbent pad in contact with the perineum of a wearer to absorb and contain a liquid such as urine.

Background of the invention

[0002]

Conventional absorbent pads are known to contact the perineum of a wearer for the purpose of absorbing and retaining excreted body fluid. Examples of absorbent pads include disposable diapers, urologic bags, and sanitary napkins. Disposable diapers are known, namely, pant diapers, in which the front and back are connected on the right and left sides, and belt-type diapers, in which the back is attached to the front with a fastening tape (Velcro) on the back for wearing diaper.

[0003]

Some types of absorbent pads are capable of absorbing large amounts of body fluid in order to ensure long-term wearing of the diaper and to absorb body fluid excreted by an adult. For example, absorbent pads such as highly absorbent urological pads used for patient care are known. Highly absorbent urological pads are usually placed in tape-type disposable diapers or pant diapers and replaced with new ones if necessary after excretion. Such urological pads typically include an absorbent element made using a large amount of absorbent material to absorb a significant amount of body fluid and is large in size to cover a large surface area of the user's body.

[0004]

Despite this, even when using highly absorbent urological pads, leakage of body fluid may occur due to prolonged wear and contamination of disposable tape diapers or pant diapers under the urological pads. In other words, with prolonged use of the diaper, the body fluid is periodically absorbed by one part (in particular, the part that covers the pelvis and the base of the legs) of the absorbent elements. Thus, with a low capacity of the absorbing element, providing diffusion (spreading) of the liquid, an increase in the absorbing load on the absorbing elements occurs. When the absorbing element is saturated, the absorption of biological fluid stops, and it begins to flow from the urological pad. To prevent leakage, it is possible to increase the amount of absorbent material in the crotch area in order to increase the absorption capacity in the pelvic area and the base of the legs so as to partially ensure the absorption of biological fluid in a larger amount. However, a local increase in the thickness of the absorbent elements will impair the fit of the urological pad and reduce the wearing comfort of the product.

[0005]

Known absorbent pads, in which the absorbing element is partially extruded (embossed) in the direction of the thickness in order to form extruded lines (grooves, grooves) to increase the diffusion capacity of the absorbing element, characterized by high absorption capacity and a large area of liquid absorption (see Patent Literature 1 and 2 ). In the absorbent member (absorbent layer) disclosed in Patent Literature 1, a dense embossing is performed on the area of the absorbent member in which it is necessary to provide high absorption and diffusion capacity of the biological fluid, such as the crotch area, while the other area is lightly embossed. embossing, and these embossed areas form a generally continuous pattern. The absorbent member disclosed in Patent Literature 2 is provided with mesh embossed lines formed on the front side, and the direction of the embossed lines is different from the longitudinal direction and the transverse direction of the article. The formation of an embossed line structure in the absorbent member allows the biological fluid to diffuse along the embossed lines and be absorbed over a wider surface area of the absorbent member, even in the case of local excretion of a large amount of biological fluid. As a result, the diffusion capacity of the absorbing elements is increased.

[0006]

In addition, absorbent pads are known in which the absorbent member is provided with a slit extending in the thickness direction in order to increase the diffusion capacity of an absorbent member characterized by high absorbency and large dimensions (see Patent Literatures 3 and 4). For example, Patent Literature 3 discloses a method for forming a Y-shaped slot in a single layer absorbent member. Patent Literature 4 discloses a method for forming a slit in each of a plurality of absorbent members stacked in a thickness direction. These slits are made in the absorbent elements for various purposes, namely: increasing the ability to diffuse liquids, improving the adherence of the absorbent element to the body of the wearer, preventing solid matter such as excrement from contacting the wearer's skin, increasing the flexibility of the absorbent element, etc.

List of bibliographic references

Patent Literature

[0007]

Patent Literature 1: JP 2004-16373 A

Patent Literature 2: JP 2015-16218 A

Patent Literature 3: JP 2012-090818 A

Patent Literature 4: JP 2014-014726 A

Summary of the invention

Technical problem

[0008]

[First task]

In embossed absorbent members, as disclosed in Patent Literature 1 and Patent Literature 2, embossed portions and non-embossed portions (non-embossed portion) differ significantly in terms of their diffusion capacity. This difference in diffusion capacity has the effect that the biological fluid predominantly spreads along the extruded lines, it is absorbed unevenly in the uncompressed area, and thus the biological fluid reaches the ends of the absorbent elements along the extruded lines and flows through these ends.

[0009]

In particular, when a biological fluid is absorbed by an absorbing element with extruded lines, the biological fluid first spreads along the extruded line due to the capillary effect and then diffuses into uncompressed areas. Thus, there is a difference in the diffusion time of the biological fluid between the areas of the extruded lines and the uncompressed areas. In the case where the density of the absorbent material for the absorbent member is low, the diffusion time difference is not a big problem. In contrast, when the density of the absorbent pad is increased in order to absorb more body fluid, the absorption of fluid in the non-compressed areas occurs with a large time lag. Thus, an absorbent element with a high absorption capacity is characterized by a higher diffusion time difference of the biological fluid between the areas with extruded lines and uncompressed areas. In certain cases, mainly extruded lines can be moistened with biological fluid, while in non-compressed areas, there is practically no absorption of biological fluid. In addition, the areas with the embossed lines contain compressed absorbent material, and therefore, due to this, in these areas less body fluid is absorbed than in the uncompressed areas. Thus, a large amount of body fluid can reach the ends of the absorbent elements along the extruded lines and flow outward.

[0010]

In order to solve the above problem, the embossed lines can be formed in the absorber with a smaller spacing between them, so that the biological fluid can freely seep through the uncompressed areas. However, the embossed lines and their adjacent areas in the absorbent body are characterized by higher rigidity and, therefore, the reduction in the spacing between the embossed lines and the increase in the density of the embossed lines will result in a rough texture of the entire absorbent body and reduce the comfort of the absorbent pad to wear.

[0011]

Thus, the first object of the present invention is to provide an absorbent liner, including an absorbent element with embossed lines, in order to absorb more body fluid and increase the permeability and diffusion of the body fluid, ensuring efficient diffusion of body fluid into uncompressed areas and absorption of body fluid over a larger area. without the need to form tightly spaced extruded lines.

[0012]

[Second task]

In accordance with the disclosed invention in Patent Literatures 3 and 4, when a slit is created in the absorbent member in order to increase the diffusion mobility of the liquid, the biological fluid flows through the slit. Thus, in the area with the slot, the diffusion mobility can be increased, but unhindered diffusion of the biological fluid throughout the absorbing element is not ensured. In particular, it is possible to ensure the diffusion of the biological fluid in the horizontal direction when the user is in the supine position, but in this case it is impossible to ensure the diffusion and absorption of the biological fluid in the upward direction, i.e. in the vertical direction when the user is standing. Thus, the creation of the slit makes it possible to increase the diffusion rate of the biological fluid, but it hinders the diffusion and flow of the biological fluid through the entire absorbing element, in particular when the user is in a standing position.

[0013]

The number of slots can be increased in the absorber in order to increase diffusion mobility. However, the creation of cuts throughout the absorbent element results in roughness on the surface of the absorbent elements, thereby reducing the wearing comfort.

[0014]

Therefore, a second object of the present invention is to provide an absorbent liner including an absorbent element with a slot to increase the diffusional mobility of the body fluid in a vertical upward direction so that absorption of body fluid is ensured throughout the absorbent body even when the wearer is in a standing position.

Solution

[0015]

[Solution of the first problem]

As a result of careful consideration of the solution to the first problem, the inventor of the present invention proposed the idea of layering two or more absorbent elements in order to increase the ability to absorb biological fluid and to form in the absorbing elements intersecting with each other extruded lines. The inventor has found that as a result of this, effective diffusion of the biological fluid into uncompressed areas and absorption of the biological fluid over a large area will be ensured without the need to form densely spaced extruded lines in the absorbent elements. The inventor has come to the conclusion that the above problem can be solved based on the research results and completed the work on the present invention. Specifically, the following is a description of the configuration of the present invention.

[0016]

The present invention relates to an absorbent pad such as a disposable diaper, urological pad or sanitary napkin. The absorbent liner includes a liquid-permeable topsheet 10, a backsheet 20, and at least two absorbent elements 30, 40, stacked in layers and located between these sheets. The backsheet 20 is preferably made of a liquid impermeable sheet metal member, however it may be made of a liquid permeable sheet metal member. On the two absorbing elements 30, 40 there are respectively several embossed lines 31, 41, i.e. grooves are extruded in the absorbent members in the thickness direction. The embossed lines 31, 41 in the two absorbent elements intersect each other at least partially when viewed in the plane direction. The embossed lines 31, 41 can be formed by forming recesses (forming recesses in the surface) on the surface side of the topsheet (on the side facing the user's skin) of the absorbent members, or by forming recesses (forming recesses in the surface) on the surface side of the backsheet ( on the side not facing the user's skin), or by forming indentations on both sides. “Seen in a plane direction” means a side view in a direction opposite to the top sheet 10 or the back sheet 20.

[0017]

According to the above configuration, the layering of the two absorbent members 30, 40 in the thickness direction increases the absorbency of the entire absorbent sheet. The formation of embossed lines 31, 41 in the absorbing elements 30, 40 makes it possible to increase the diffusion mobility of the biological fluid. The arrangement of the absorbent elements 30, 40 with the embossed lines 31, 41 crossing each other allows the biological fluid to efficiently seep even through areas without embossed lines (uncompressed areas). It is meant that the biological fluid spread along the extruded lines in one of the absorbing elements can be effectively absorbed in the uncompressed area of the other absorbing element. Thus, it is unlikely that the body fluid flowing along the extruded lines in one absorbent member will reach the ends, thus effectively preventing the body fluid from leaking outward. The two absorbent members 30, 40 are capable of absorbing body fluid over a large surface area, thereby increasing the ability to absorb body fluid, thereby not causing discomfort to the user for a long period of time. The formation of embossed lines 31, 41 in the two absorbent members 30, 40 eliminates the need to form densely spaced embossed lines in each of the absorbent members. This prevents the formation of a rough texture of the absorbing elements.

[0018]

In the absorbent liner of the present invention, the two absorbent members 30, 40 may respectively have a plurality of unpressed portions 32, 42 surrounded by embossed lines 31, 41. In this case, at least some of the embossed lines in one of the absorbent members preferably overlap the unpressed portions in another absorbing element.

[0019]

In accordance with the above configuration, the uncompressed portions 32, 42 are surrounded by extruded lines 31, 41, which effectively direct the body fluid to the uncompressed portions 32, 42. In addition, at least some of the extruded lines in one absorber overlap the uncompressed portions in the other. absorbing element, which makes it possible to effectively direct the biological fluid flowing along the extruded lines to the uncompressed areas.

[0020]

In an absorbent article of the present invention, the two absorbent members 30, 40 may have a correspondingly large number of intersection points 33, 43, with the embossed lines 31, 41 overlapping each other. In this case, at least some of the intersection points in one of the absorbent elements preferably overlap the unpressed (unpressed) portions in the other absorber.

[0021]

According to the above configuration, the biological fluid can be retained and remain at the intersection points 33, 43 in the absorbent members 30, 40 due to the intersection of the embossed lines 31, 41. The overlapping of the intersection points in one absorbent member with uncompressed portions in the other absorbent member allows the biological fluid to be retained in intersection points, flow effectively into uncompressed areas.

[0022]

In an absorbent article of the present invention, when there are a large number of intersection points 33, 43 in the absorbent members 30, 40, it is preferred that the intersection points in one of the absorbent members overlap at least partially the intersection points in the other absorbent member. It is meant that at least some of the plurality of intersection points in one absorber preferably overlap at least some of the plurality of intersection points in the other absorber.

[0023]

According to the above configuration, the overlapping intersection points in the absorbent members allow the biological fluid to be efficiently distributed from one absorbent member to another through the overlapping intersection points. It is meant that, the biological fluid spreading along the extruded lines in one absorber is delayed at the intersection points, but then flows to the extruded lines in the other absorber through the intersection points in the other absorber. Thus, the overlapping intersection points in the absorbent elements allow the embossed lines to function more efficiently in terms of liquid diffusion in both absorbent elements.

[0024]

In the present invention, the two absorbent members are the first absorbent member 30 located on the topsheet 10 side and the second absorbent member 40 located on the backsheet 20 side. In this case, the second absorbent member 40 includes embossed lines 41 representing recesses in a side surface of the first absorber 30. A gap is preferably formed between the portions of the second embossed absorber 40 and the first absorber 30.

[0025]

According to the above configuration, a gap is formed between the first absorbent member 30 and the second absorbent member 40. Therefore, the biological fluid absorbed in the first absorbent member 30 from the topsheet 10 side flows into the gap and effectively spreads in the second absorbent member 40.

[0026]

In the absorbent core of the present invention, the first absorbent member 30 includes embossed lines 31 in which a side of the second absorbent member is recessed. A gap is preferably formed between the portions of the first embossed absorber 30 and the second absorber 40.

[0027]

According to the above configuration, the formation of the embossed lines 31 at the recessed rear side of the first absorbent member 30 allows biological fluid leaked through the first absorbent member 30 to drain onto the second absorbent member 40.

[0028]

The absorbent pad of the present invention may further include a third absorbent member 70 between the topsheet 10 and the first absorbent member 30 or between the backsheet 20 and the second absorbent member 40. In this case, as the first absorbent member 30 and the second absorbent member 40, the third absorbent member 70 also preferably provided with embossed lines 71 in which the absorbent member is recessed in the thickness direction.

[0029]

In accordance with the above configuration, the inclusion of an additional third absorbent member 70 in the structure enhances the absorbent capacity of the entire absorbent member. In addition, the formation of embossed lines 71 in the third absorber 70 allows the diffusion mobility of the liquid to be maintained.

[0030]

In an absorbent article of the present invention, the embossed lines in one of the absorbent members may be located in the longitudinal direction of the absorbent article, while the embossed lines in the other absorbent member may be located in the transverse direction of the absorbent article.

[0031]

According to the above configuration, the intersection of the embossed lines in one absorber located in the longitudinal direction with the embossed lines in the other absorbing member located in the transverse direction allows the biological fluid to diffuse both in the longitudinal direction and in the transverse direction. In particular, the biological fluid may not diffuse in the longitudinal direction, as a result of which, as can be seen, it can flow in the transverse direction. Thus, it is preferable to form the embossed lines extending in the longitudinal direction in the upper absorber, and to form the embossed lines extending in the transverse direction in the lower absorbing member. At the same time, first, the biological fluid contacting with the upper absorbing element diffuses in the longitudinal direction and then the biological fluid that has leaked through the lower absorbing element diffuses in the transverse direction. As a result, it is possible to ensure efficient diffusion of the biological fluid in the longitudinal direction and to prevent the biological fluid from flowing from the ends when it flows in the transverse direction.

[0032]

In an absorbent article of the present invention, one of the absorbent members includes a plurality of non-compressed portions surrounded by embossed lines, and the embossed lines in the other absorbent member may be in the longitudinal direction of the absorbent pad or in the transverse direction of the absorbent pad.

[0033]

According to the aforementioned configuration, the embossed lines in one absorbent element can be formed as a mesh structure, for example, with the aim of forming non-compressed areas surrounded by embossed lines, while the embossed lines in the other absorbent element can be formed so as to be positioned in longitudinal direction or transverse direction. In addition, with this method, the embossed lines 31, 41 in the two absorbent elements intersect each other at least partially when viewed in the plane direction, which ensures efficient diffusion of the biological fluid into uncompressed areas and absorption of the biological fluid over a large area.

[0034]

In accordance with the present invention, in an absorbent pad, in which embossed lines are made in the absorbent element to increase the ability to absorb biological fluid and diffusion mobility of biological fluid, efficient diffusion of biological fluid into uncompressed areas and absorption of biological fluid over a large area is ensured without the need to form densely spaced extruded lines. As a result, it is possible to prevent body fluid from leaking from the ends of the absorbent members without impairing the wearing comfort of the absorbent pad.

[0035]

[Solution of the second problem]

As a result of careful study of the solution to the second problem, the inventor of the present invention proposed to configure an absorbent liner with several layered absorbent elements in such a way that a slot is formed in the upper part of the absorber, as well as one or more embossed lines in the lower absorber. The inventor has found that this configuration allows the body fluid to flow through the slot in the upper absorbent member, drain into the lower absorbent member, and then diffuse along extruded lines in the lower absorbent member, whereby the upper and lower absorbent members completely absorb the biological fluid. In addition, the embossed lines in the lower absorber have the ability to absorb the biological fluid upward in the vertical direction due to the capillary effect. Thus, the formation of embossed lines in the lower absorber, preferably, in particular, the formation of embossed lines overlapping the slit in the upper absorber, allows the biological fluid drained through the slit to diffuse upwardly through the extruded lines. The inventor has come to the conclusion that the above problem can be solved based on the research results and completed the work on the present invention. Specifically, the following is a description of the configuration of the present invention.

[0036]

The present invention relates to an absorbent pad, such as a disposable diaper, urological pad, or sanitary napkin. The absorbent pad includes a liquid-permeable topsheet 10, a backsheet 20, and at least two absorbent members 30, 40 sandwiched between said sheets. The backsheet 20 is preferably made of a liquid impermeable sheet member, however, said sheet may be made of a liquid permeable sheet member. The at least two absorbent members include an upper absorbent member 30 located on the top sheet 10 side and a lower absorbent member 40 located on the backsheet 20 side. The upper absorbent member 30 includes one slit 36 or more extending through the absorbent member in the direction thickness. The lower absorbent member 40 is provided with embossed lines 41 in which the absorbent member is recessed in the thickness direction. The "slit" in the upper absorbent member 30 includes an aperture-like slot closed at both ends, an open slot closed at one end and open at the other end, and a slot dividing the absorbent members open at both ends.

[0037]

According to the above configuration, the formation of the slit 36 in the upper absorber 30 allows a biological fluid such as urine to diffuse in the upper absorber 30 through the slit 36 and drain onto the lower absorber 40 through the slit 36. Due to the fact that the lower absorber 40 includes extruded lines 41, the body fluid drained through the slit 36 diffuses in the lower absorber 40 along the extruded lines 41. In particular, the extruded lines 41 in the lower absorber 40 have the ability to absorb the biological fluid upward in the vertical direction. Thus, even when the user is in a standing position, the body fluid spreads over a large area in the lower absorbent member 40 along the embossed lines 41. In addition, the biological fluid spread out in the lower absorbent member 40 along the embossed lines 41 also seeps through the upper absorbent member 30. This ensures the absorption of biological fluid throughout the volume of the upper and lower absorbing elements 30, 40.

[0038]

In the absorbent core of the present invention, the slit 36 in the upper absorbent member 30 preferably overlaps at least some of the embossed lines 41 in the lower absorbent member 40.

[0039]

According to the above configuration, the arrangement of the extruded lines 41 in the lower absorber 40 below the slot 36 in the upper absorber 30 allows the body fluid drained through the slot 36 to be guided towards the extruded lines 41 and allows the liquid to flow along the extruded lines 41. Communication of the slot 36 with the extruded lines 41 ensures the absorption of biological fluid in all absorbing elements, increasing the rate of absorption, increasing the amount of absorbed fluid and preventing the leakage of biological fluid.

[0040]

In an absorbent article of the present invention, the slit 36 in the upper absorbent member 30 is preferably located in the longitudinal direction of the absorbent article. In this case, the slit 36 preferably overlaps one of the embossed lines 41 in the lower absorbent member 40, which are located in the transverse direction of the absorbent sheet or in an oblique direction with respect to the longitudinal direction.

[0041]

According to the aforementioned configuration, the overlapping arrangement of the longitudinally positioned slot 36 by the embossed lines 41 extending in the transverse direction allows the biological fluid to spread both in the longitudinal direction and in the transverse direction. In particular, the biological fluid is unable to spread in the longitudinal direction, and there is a possibility of its flow from the ends in the transverse direction. Thus, it is preferable to form a slit 36 extending in the longitudinal direction in the upper absorber 30 and to form embossed lines 41 located in the transverse direction in the lower absorber 40. This first of all allows the biological fluid to flow in contact with the upper absorber 30, in the longitudinal direction and then secondarily the spreading of the biological fluid leaked through the lower absorbing element 40 in the transverse direction. As a result, effective diffusion of the biological fluid in the longitudinal direction and prevention of the flow of the biological fluid from the ends in the transverse direction is ensured. In addition, the arrangement of the embossed lines 41 in the lateral direction of the lower absorber 40 under the notch 36 in the upper absorber 30 prevents the slit 36 from narrowing even when pressure is applied in the lateral direction, for example, when the upper absorber 30 is sandwiched between the legs of the wearer. ... It is understood that the formation of the embossed lines 41 extending laterally in the lower absorbent 40 increases the rigidity of the lower absorbent 40 capable of resisting pressure in the lateral direction. As a result, the stiffness of the upper absorbent member 30 overlapped by the lower absorbent member 40 and connected to said member also increases the likelihood that the slit 36 in the upper absorbent member 30 will not be squashed and crumpled.

[0042]

In the absorbent core of the present invention, the upper absorbent member 30 is preferably provided with embossed lines 31 in which the absorbent member is recessed in the thickness direction.

[0043]

According to the above configuration, the formation of the embossed lines 31 as well as the slit 36 in the upper absorber 30 further increases the diffusion mobility of the biological fluid on the surface of the upper absorbing member 30. In addition, the biological fluid seeps through the upper absorber 30 over a larger area along the embossed lines 31 and then the biological fluid that has seeped through the upper absorbing element 30 flows to the lower absorbing elements 40. This ensures the absorption of biological fluid over a large area in the upper and lower absorbing elements 30, 40.

[0044]

In the absorbent article of the present invention, the plurality of embossed lines 31 in the upper absorbent member 30 preferably include embossed lines connected to the slit 36. In particular, it is preferred that each of the embossed lines 31 in the upper absorbent member 30 has at least one end portion, reaching the slot 36, the outer peripheral edge of the slot 36 was compressed, and the embossed lines 31 and the slot 36 communicated with each other.

[0045]

According to the above configuration, the slit 36 and the extruded lines 31 communicate with each other in the upper absorbent member 30, and therefore the biological fluid temporarily retained in the slit 36 can flow freely along the extruded lines 31. On the other hand, the biological fluid that has spread along the extruded lines 31, can flow into the slot 36, which freely directs the biological fluid into the lower absorbing element 40 through the slot 36. In addition, the slot 36 is connected to several extruded lines 31, and, therefore, the biological fluid temporarily retained in the slot 36 has the ability to flow freely along the extruded lines 31. In particular, the biological fluid can flow from the inner surface of the wall of the slot 36 along the extruded lines 31, thereby increasing the diffusion mobility of the biological fluid in the upper absorbing element 30.

[0046]

In the absorbent article of the present invention, the lower absorbent 40 preferably includes uncompressed portions 42 surrounded by embossed lines 41. In this case, the slot 36 in the upper absorbent 30 preferably overlaps at least some of the uncompressed portions 42 in the lower absorbent 40.

[0047]

When the biological fluid is absorbed by the lower absorbing element 40 with extruded lines 41, the biological fluid first spreads along the extruded lines 41 due to the capillary effect and then diffuses into the uncompressed areas 42. Thus, there is a difference in the diffusion time of the biological fluid between the areas with the extruded lines 41 and the uncompressed regions 42. If the density of the absorbent material for the absorbent element is low, the diffusion time difference is not a big problem. In contrast, when the density of the absorbent pad is increased in order to absorb more body fluid, absorption of fluid in the non-compressed portions 42 occurs with a large time lag. Thus, an absorbent element with a high absorption capacity is characterized by a higher difference in time of diffusion of the biological fluid between the areas with extruded lines 41 and uncompressed areas 42. In certain cases, mainly the extruded lines 41 can be wetted with the biological fluid, while on the uncompressed sections 42 practically do not absorb biological fluid. According to the above configuration, positioning the slit 36 in the upper absorbent 30 above the uncompressed portions 42 of the lower absorbent 40 allows body fluid to rapidly seep through the uncompressed portions 42.

[0048]

In the absorbent core of the present invention, the lower absorbent member 40 includes intersection points 43 at which the embossed lines 41 overlap one another. In this case, it is preferable that the slit 36 in the upper absorber 30 overlaps the intersection points 43 in the lower absorber 40.

[0049]

According to the above configuration, the arrangement of the intersection points 43 of the embossed lines 41 in the lower absorber 40 under the slot 36 in the upper absorber 30 allows the biological fluid to rapidly diffuse along the embossed lines 41. The intersection points 43 of the embossed lines 41 are meant to act as centers ways of diffusion of biological fluid. Thus, the biological fluid drained through the slit 36 in the upper absorber 30 flows to and contacts the intersection points 43 in the lower absorber 40, resulting in the spreading of the biological fluid over a large area in the lower absorber 40 centered on the points intersection 43.

[0050]

The absorbent core of the present invention may further include one or more absorbent members 70 between the backsheet 20 and the lower absorbent member 40. In this case, at least one of the several additional absorbent members 70 is preferably provided with embossed lines 71 in which the absorbent member is recessed into direction of thickness.

[0051]

In accordance with the above configuration, the inclusion of additional absorbent members 70 in the structure enhances the absorbency of the overall absorbent pad. In addition, the formation of embossed lines 71 in the additional absorbent members 70 helps to maintain the diffusion mobility of the liquid.

[0052]

In accordance with the present invention, there is provided an absorbent liner including an absorbent element with a slit that increases the diffusion mobility of the biological fluid upward in the vertical direction so that absorption of the biological fluid is ensured by the entire surface of the absorbent element even when the user is in a standing position.

Brief Description of Drawings

[0053]

FIG. 1 is a plan view of an absorbent pad in accordance with a first embodiment of the present (first) invention.

FIG. 2 is a sectional view of FIG. 1 along the line II-II.

FIG. 3 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a first embodiment of the present (first) invention.

FIG. 4 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a first embodiment of the present (first) invention.

FIG. 5 is an enlarged view of the pattern of embossed lines formed in the upper absorber and the lower absorber.

FIG. 6 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a second embodiment of the present (first) invention.

FIG. 7 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a second embodiment of the present (first) invention.

FIG. 8 is an enlarged view of the pattern of embossed lines formed in the upper absorber and the lower absorber.

FIG. 9 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a third embodiment of the present (first) invention.

FIG. 10 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a third embodiment of the present (first) invention.

FIG. 11 is a diagram illustrating examples of shapes of the upper absorbent member and the lower absorbent member in cross section.

FIG. 12 is a diagram illustrating examples of shapes of the upper absorber, the lower absorber, and the additional absorber in cross section.

FIG. 13 is a plan view of an absorbent pad in accordance with a first embodiment of the present (second) invention.

FIG. 14 is a cross-sectional view of FIG. 13 along the line XIV-XIV.

FIG. 15 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a first embodiment of the present (second) invention.

FIG. 16 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a first embodiment of the present (second) invention.

FIG. 17 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a second embodiment of the present (second) invention.

FIG. 18 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a second embodiment of the present (second) invention.

FIG. 19 is an enlarged view of the pattern of embossed lines formed in the upper absorber and the lower absorber.

FIG. 20 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a third embodiment of the present (second) invention.

FIG. 21 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a third embodiment of the present (second) invention.

FIG. 22 is an enlarged view of a pattern of embossed lines formed in the upper absorbent body and the lower absorbent body.

FIG. 23 is a diagram illustrating separately an upper absorbent member and a lower absorbent member of an absorbent article in accordance with a fourth embodiment of the present (second) invention.

FIG. 24 is a diagram illustrating an overlapping upper absorbent member and a lower absorbent member of an absorbent article in accordance with a fourth embodiment of the present (second) invention.

FIG. 25 is a diagram illustrating examples of shapes of the upper absorber and the lower absorber in cross-section.

FIG. 26 is a diagram illustrating examples of shapes of the upper absorbent member, the lower absorbent member and the additional absorbent member in cross section.

Description of embodiments of the present invention

[0054]

The following is a description of an exemplary embodiment of the present invention, with reference to the accompanying drawings. The present invention is not limited to the following exemplary embodiments of the present invention, but includes the exemplary embodiments of the present invention mutatis mutandis to the extent that they are obvious to those skilled in the art from the exemplary embodiments of the present invention presented below.

[0055]

The term "AB" in this context means "A or more and B or less".

The term "longitudinal direction" in this context means the direction of the absorbent pad in which the front portion located in the groin of the wearer is connected to the back portion located on the lower back of the wearer. The term "lateral direction" means a direction perpendicular to the plane of the longitudinal direction of the absorbent article. FIG. 1, the longitudinal direction of the absorbent pad is indicated by the Y-axis and the transverse direction of the absorbent pad is indicated by the X-axis.

The term “skin-side” in this context means the side of the absorbent pad facing the skin of the wearer when the absorbent pad is being worn. The term “non-skin-facing side” means the side of the absorbent pad not facing the user's skin when the absorbent pad is being worn.

[0056]

[I. First invention]

A description of the configuration of the present invention for solving the first object (first invention) will be made with reference to FIG. 1-12.

[0057]

[1. First embodiment of the present invention]

An absorbent sheet according to a first embodiment of the first invention will be described with reference to FIG. 1-5. The absorbent pad according to the first embodiment of the present invention is formed as a large urological pad. FIG. 1 is a general plan view of an absorbent pad 100, and FIG. 2 is a drawing schematically illustrating a cross-sectional view of the absorbent pad 100 illustrated in FIG. 1 along the line II-II. In the cross-sectional drawing of FIG. 2, various sub-assemblies are illustrated with gaps therebetween for easy understanding of the configuration of the absorbent liner 100. However, there is really no need to form gaps between the sub-assemblies.

[0058]

As illustrated in FIG. 1, the absorbent pad 100 may be longitudinally divided into a front portion 1 located on the abdomen of the wearer, a back portion 2 located on the lower back of the wearer, and a crotch portion 3 located between the front and rear portions. In particular, the absorbent liner 100 may be pumpkin-shaped or hourglass-shaped as shown in a plan view. The absorbent towel 100 is meant to include a narrow portion in the crotch portion 3 in which the width of the absorbent article 100 is at its smallest. On the other hand, the front part 1 and the back part 2 of the absorbent liner 100 are provided with side flaps that protrude more outwardly to the right and left sides than the narrow portion of the crotch part 3. Thus, the width of the side flaps of the front part 1 and rear part 2 exceeds the width of the narrow portion of the crotch portion 3. As a result, the absorbent liner 100 can be pumpkin-like (hourglass-shaped). However, the shape of the absorbent liner 100 can be altered as needed, and for example given a simple rectangular shape.

[0059]

As illustrated in FIG. 1 and 2, an absorbent sheet 100 includes a generally liquid-permeable topsheet 10, a liquid-impermeable backsheet 20, and a plurality of absorbent elements 30, 40 interposed between said sheets. Hereinafter, the absorbent member located on the topsheet 10 side is called the “upper absorbing member 30” (first absorbing member), and the absorbing member located on the backsheet 20 side is called the “lower absorbing member 40” (second absorbing member). As illustrated in FIG. 2 in a cross-sectional view, the upper absorbent 30 and the lower absorbent 40 overlap each other in the thickness direction. The upper absorber 30 and the lower absorber 40 are glued together with an adhesive, such as hot melt adhesive, so as to prevent the two elements from moving relative to each other. The topsheet 10 covers the skin-facing side of the laminated absorbers 30, 40 and the backsheet 20 covers the non-skin side of the laminated absorbers 30, 40. As illustrated in FIG. 1 and 2, the topsheet 10 and the backsheet 20 are glued together around the absorbent members 30, 40 with hot melt adhesive, heat sealing or ultrasonic welding. Thus, the absorbent members 30, 40 are surrounded by welded portions of the topsheet 10 and the backsheet 20. A pair of three-dimensional diaper frills 50 are formed on the right and left sides of the absorbent pad 100 as seen in the lateral direction. A pair of three-dimensional diaper ruffles 50 are provided on both the right and left sides of the absorbent members and act as a leakage barrier to prevent urine from leaking. The absorbent liner 100 may further include a cover sheet 60 covering the non-skin side of the backsheet 20. The following is a description of the individual constituents of the absorbent liner 100.

[0060]

The topsheet 10 is a sheet-like member in contact with the wearer's crotch to pass a body fluid, such as urine, to the absorbent members 30, 40. The topsheet 10 is thus made of a highly flexible liquid-permeable material. For example, a woven fabric, a nonwoven fabric, or a porous film can be used as the liquid-permeable material for the topsheet 10. In addition, the liquid-permeable material can be made by hydrophilically treating the fibers of a thermoplastic plastic, such as polypropylene, polyethylene, polyester fiber or nylon, and making it, for example, a nonwoven fabric. The nonwoven fabric may be an air filled nonwoven fabric, a point bonded nonwoven fabric, a meltblown nonwoven fabric, an expanded nonwoven fabric (meltblown), or the like.

[0061]

The backsheet 20 is a sheet member designed to prevent bodily fluid that has passed through the topsheet 10 and absorbed by the absorbent members 30, 40 to leak onto the outside of the diaper. Thus, the backsheet 20 is preferably formed from a liquid impermeable material. For example, the liquid impermeable material for the backsheet 20 is a liquid impermeable polyethylene film. In particular, the backsheet 20 is preferably formed from a microporous polyethylene film with a plurality of fine pores of 0.1 to 4 µm in order to provide liquid impermeability and air permeability.

[0062]

The absorbent members 30, 40 are members for absorbing bodily fluid, such as urine, and retaining the absorbed body fluid. Absorbers 30, 40 are sandwiched between the liquid-permeable topsheet 10 and the liquid-impermeable backsheet 20. The upper absorbent 30 and the lower absorbent 40 are preferably bonded together with hot melt adhesive or the like to prevent displacement. The absorbent elements 30, 40 are respectively made of absorbent materials 34, 44 and wrap sheets 35, 45 covering the absorbent materials 34, 44. The absorbent materials 34, 44 may be made of fluff pulp obtained by crushing a fibrous material such as fibers spruce or broadleaf wood, superabsorbent polymer or hydrophilic sheets. The absorbent materials 34, 44 can be made from one cellulose fluff, a superabsorbent polymer and a hydrophilic sheet, or a combination of two or more of these materials. In general, the absorbent materials 34, 44 are made by spraying a superabsorbent polymer onto the fluff pulp. The wrap sheets 35, 45 are sheet members that cover the absorbent materials 34, 44 in order to maintain their shape. The wrap sheets 35, 45 are liquid-permeable sheet members. For example, the wrap sheets 35, 45 may be formed from a thin sheet such as tissue paper or a commonly known nonwoven fabric.

[0063]

In the present invention, the upper absorber 30 and the lower absorber 40 are preferably different in size. In particular, in the present invention, the length and width of the upper absorbent member 30 is preferably less than the length and width of the lower absorbent member 40. In this case, the upper absorbent member 30 is placed on the lower absorbent member 40 centered on the crotch portion 3 of the absorbent pad 100. Thereby an increase in the absorption capacity of the crotch portion 3 is provided, in the area of which a large amount of biological fluid is excreted. However, the dimensions of the upper absorber 30 and the lower absorber 40 can be absolutely identical in size and shape.

[0064]

A pair of three-dimensional diaper ruffles 50 are provided on both the right and left sides of the absorbent members and act as a leakage barrier to prevent urine from leaking. Each of the three-dimensional frills 50 of the diaper is generally formed from a side sheet 51 and one or more elastic stretch members 52. The crotch portion 3 of each of the side sheets 51 includes a widthwise outer portion joined to the skin-facing side of the topsheet 10 and the backsheet 20 , as well as the open inner part located along the width. One or more elastic stretch members 52 are longitudinally attached to the inner ends of the open side sheets 51. Thus, when the elastic stretch members 52 are compressed, the inner ends of the side sheets 51 are lifted by the compressive force of the elastic stretch members 52, and on the side sheets 51, folds (ruffles) are formed in the areas with compressed elastic stretch elements 52. The side sheets 51 may be sheets of nonwoven fabric, made, for example, by embossing or fiber spinning with ejection with a high speed air flow, and preferably, in particular, highly waterproof and breathable sheets of non-woven fabric such as SMS (spunbond-meltblown-spunbond) or SMMS (spunbond-meltblown-meltblown-spunbond).

[0065]

The cover sheet 60 is an element that reinforces the backsheet 20 and improves the texture of the backsheet 20. The cover sheet 60 is attached to the non-skin side of the backsheet 20. The material for making the cover sheet 60 is a woven fabric or a nonwoven fabric. In particular, the material for the cover sheet 60 is preferably a non-woven fabric or a wet-made non-woven fabric made of a thermoplastic plastic such as polyethylene, polypropylene or polyester fiber.

[0066]

As illustrated in FIG. 1 and 2, an absorbent sheet 100 according to the present invention is characterized in that the absorbent members 30, 40 include a plurality of embossed lines 31, 41 in which the absorbent members 30, 40 include grooves in the thickness direction. It is understood that several embossed lines 31, 41 are formed in the upper absorber 30 and the lower absorber 40. The embossed lines 31, 41 can be formed by partially pressing and sealing the absorbent members 30, 40 on both or one of the skin-facing sides and non-skin sides. Thus, the density of the absorbent materials 34, 44 in the absorbent elements 30, 40 increases in the areas with the embossed lines 31, 41. The pattern of the embossed lines 31 in the upper absorber 30 and the embossed lines 41 in the lower absorber 40 is created so that the lines intersect each other, at least in part, when viewed from above perpendicular to the horizontal plane. Below is a detailed description of the structure of the embossed lines 31 in the upper absorber 30 and the structure of the embossed lines 41 in the lower absorbing member 40.

[0067]

FIG. 3 (a) and 3 (b) show plan views of the upper absorber 30 and the lower absorber 40, which are conceptually separated and laterally positioned relative to each other. FIG. 3 (c) and 3 (d) schematically illustrate the shape of the absorbent members 30, 40 in cross-section along the line III-III. FIG. 4 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 4 (b) schematically illustrates the cross-sectional shape of the overlapping absorbent elements along the line IV-IV. FIG. 5 illustrates the structure of the embossed lines 31 provided in the upper absorber 30 and the structure of the embossed lines 41 provided in the lower absorber 40.

[0068]

As illustrated in FIG. 3-5, the upper absorbent member 30 includes embossed lines 31 in the form of a square grid. In this context, a "square lattice structure" means a structure in which a plurality of extruded lines running parallel to the longitudinal direction and a plurality of extruded lines running parallel in the transverse direction intersect each other to form square uncompressed regions. Specifically, in this embodiment of the present invention, the pattern of the embossed lines 31 in the upper absorber 30 is designed such that all the uncompressed portions 32 surrounded by the embossed lines 31 have a regular square shape (a grid structure of regular squares). Thus, the upper absorber 30 can be considered to include a plurality of embossed lines 31, unpressed portions 32 surrounded by embossed lines 31, and intersection points 33 at which the embossed lines 31 intersect each other. In the following description, for convenience, the embossed lines 31 in the upper absorber 30 will be referred to as "upper embossing lines 31", the uncompressed portions 32 will be referred to as the "upper uncompressed portions 32", and the intersection points 33 will be referred to as the "upper intersection points 33".

[0069]

On the other hand, the lower absorbent member 40 includes embossed lines 41 in the form of a lattice pattern of rhombuses. In this context, a "lattice diamond pattern" means a structure in which several embossed lines extending in the floor direction at an angle with respect to the longitudinal direction and in the transverse direction intersect each other to form diamond-shaped (diamond-shaped) uncompressed regions. Specifically, in this embodiment, the embossed lines 41 in the lower absorbent 40 are structured such that all the unpressed portions 42 surrounded by the embossed lines 41 have a regular rhombic (regular diamond) shape (net structure of regular rhombuses). Thus, the lower absorber 40 can be considered to include a plurality of embossed lines 41, unpressed portions 42 surrounded by embossed lines 41, and intersection points 43 at which the embossed lines 41 intersect each other. In the description below, for convenience, the embossed lines 41 in the lower absorbent 40 are referred to as "lower emboss lines 41", the unpressed portions 42 are referred to as the "lower unpressed portions 42" and the intersection points 43 are referred to as the "lower intersection points 43".

[0070]

In this embodiment of the present invention, the upper embossed lines 31 are formed by compressing and embossing grooves in the upper absorbent member 30 from the side facing the skin. Likewise, the lower extruded lines 41 are formed by compressing and extruding grooves in the lower absorbent member 40 from the skin side. Thus, when the upper absorbent 30 and the lower absorbent 40 overlap each other, a gap is formed between the absorbent members in the extruded portions of the lower absorbent 40.

[0071]

FIG. 4 and 5 illustrate the overlapping lattice structure of the embossed lines 31 in the form of regular squares, and the lattice structure of the embossed lines 41 in the form of regular diamonds. As can be seen from the drawings, in this embodiment, the area of the upper unpressed portion 32 is larger than the area of the lower unpressed portion 42. Thus, when the upper absorber 30 and the lower absorber 40 overlap, the lower uncompressed portion 42 (regular diamonds) coincides with the upper unpressed area 32 (regular square).

[0072]

In addition, in this embodiment, the four lower intersections 43 forming one lower unpressed portion 42 (regular diamonds) overlap the four upper embossed lines 31 forming one upper uncompressed portion 32 (regular square). Thus, as illustrated in FIG. 4 and 5, it can be seen that the lower unpressed portion 42 (regular diamonds) fits into the upper unpressed portion 32 (regular square). This means that the center (point of intersection of the diagonal lines) of the upper unpressed area 32 (regular square) and the center (point of intersection of the diagonal lines) of the lower unpressed area 42 (regular diamonds) coincide with each other. Moreover, as illustrated in FIG. 3, the longitudinal length L of the upper uncompressed portion 32 (regular square) is almost equal to the length D1 of the diagonal line in the longitudinal direction of the lower uncompressed portion 42 (regular diamonds) (L = D1). In addition, the lateral length B of the upper unpressed portion 32 (regular square) is almost equal to the diagonal length D2 of the lower unpressed portion 42 (B = D2). The term "almost" in this context means that an error of ± 5% is allowed. When these conditions are met, the four lower intersections 43 defining the lower unpressed portion 42 (regular diamonds) overlap the four upper extruded lines 31 to form the upper uncompressed portion 32 (regular square).

[0073]

Moreover, as illustrated in FIG. 4 and 5, each of the upper intersection points 33 overlaps the center (point of intersection of the diagonal lines) of the lower unpressed portion 42 (regular diamonds). On the other hand, the upper intersections 33 overlap some of the plurality of lower non-compressed portions 42 (regular diamonds), but do not overlap others. In the examples illustrated in FIG. 4 and FIG. 5, of a plurality of rows of lower unpressed portions 42, rows of lower unpressed portions 42 overlapping upper intersections 33 and rows of lower unpressed portions 42 not overlapping upper intersections 33 alternately coincide. Likewise, of the multiple lines of the lower unpressed portions 42, the lines of the lower unpressed portions 42 overlapping the upper intersections 33 and the lines of the lower unpressed portions 42 not overlapping the upper intersections 33 alternately coincide.

[0074]

As described above, the formation of the structure (grid structure of a regular square) of the upper embossed lines 31 and the structure (grid structure of regular rhombuses) of the lower embossed lines 41 ensures efficient percolation and movement of the biological fluid into uncompressed areas and absorption of the biological fluid over a large area of the two absorbing elements without the need forming densely spaced embossed lines in one absorber. It is understood that the biological fluid spreading along the upper extruded lines 31 in the upper absorbing element 30 is absorbed in the lower uncompressed portions 42 of the lower absorbing element 40. Thus, it is practically excluded that the biological fluid spreading along the upper extruded lines 31 in the upper absorbing member 30 reaches the end portions, thereby effectively preventing biological fluid from leaking outward. The two absorbent elements 30, 40 are capable of absorbing a biological fluid over a large area, which makes it possible to increase the absorption of the biological fluid and practically not cause a feeling of discomfort for the user for a long time. At the intersection points 33, 43 formed in the absorbent members 30, 40, the embossed lines 31, 41 cross each other, thereby allowing the body fluid to be retained therein. Thus, the overlapping of the upper intersections 33 in the upper absorber 30 with the lower uncompressed portions 42 of the lower absorber 40 allows the body fluid retained at the upper intersections 33 to effectively leak through the lower uncompressed portions 42.

[0075]

In addition, the alternating coincidence of the rows and lines of the lower uncompressed portions 42 overlapping the upper intersection points 33 ensures further spreading of the biological fluid leaked through the upper absorbing element 30 over a larger area. Thus, biological fluid leaked through the upper absorbent member 30 can spread and leak over a large area of the lower absorbent member 40.

[0076]

The extruded lines function as grooves through which the liquid flows and the function of diffusion of the liquid along the compressed areas into the uncompressed areas around the compressed areas due to the capillary effect. Even when the embossed lines are not used as grooves, fluid flows from the embossed lines in one of the absorbent members to the embossed lines or unpressed portions of the other absorbent member. This is explained below. The extruded lines are made by fluffing up the absorbent material for the pressure absorbent element. Thus, when the absorber absorbs liquid, the thickness of the absorber changes in the areas with the embossed lines. In particular, as the liquid is absorbed by the pulp and the superabsorbent polymer in the embossed lines, the distance between the fibers of the pulp gradually decreases and the superabsorbent polymer swells. Consequently, the depth of the embossed lines gradually decreases and, ultimately, the depth becomes practically equal to the thickness of the uncompressed areas after the polymer has swollen. Thus, the extruded lines may have significant depth before absorption of liquid, but their depth gradually decreases as the absorbed liquid enters. Thus, it is ensured that liquid from the extruded lines in one of the absorbent elements can flow freely from the extruded lines or uncompressed portions of the other absorbent element overlapping one absorber element. In other words, the extruded lines are grooved at the initial stage of liquid absorption, and therefore the liquid enters the extruded lines first. In areas with extruded lines, the extruded lines swell as more liquid is absorbed, and therefore, the liquid moves to extruded lines or uncompressed areas of another absorbent element overlapping the swollen extruded lines, as described above.

[0077]

Below are the numerical values of the constituent elements of the absorbent pad. For example, the thickness of the absorbent elements 30, 40, ie the thickness of the unpressed portions 32, 42, is preferably 5 to 20 mm, in particular preferably 8 mm to 15 mm. The thickness of the absorbent elements 30, 40 in the areas with embossed lines 31, 41 is preferably 1 mm to 10 mm, in particular preferably 2 mm to 5 mm. Generally, however, the thickness of the embossed portions 31, 41 is less than the thickness of the unpressed portions 32, 42. For example, the thickness of the embossed portions 31, 41 is preferably 3% to 50% of the thickness of the uncompressed portions 32, 42, in in particular, preferably 5% to 20%.

[0078]

The width of the embossed lines 31, 41 is preferably 1 mm to 5 mm, in particular, preferably 2 mm to 4 mm. The length L of the upper uncompressed portion 32 illustrated in FIG. 2 is preferably 10 mm to 50 mm, in particular preferably 20 mm to 40 mm or 30 mm. The preferred range of digital values for the width B of the upper unpressed portions 32 is the same as the range of digital values for the length L described above. The length L and the width B are preferably nearly equal, but may differ. In other words, the shape of the upper uncompressed portion 32 is not limited to a regular square shape, and the shape of the upper uncompressed portion 32 may be any other square shape. The length D1 of the diagonal line in the longitudinal direction of the lower unpressed portion 42 illustrated in FIG. 2 is preferably 10 mm to 50 mm, in particular preferably 20 mm to 40 mm or 30 mm. The preferred range of digital values for the length D2 of the diagonal line in the lateral direction of the lower uncompressed portion 42 is the same as the range of values for the length D1 described above. The length D1 and the length D2 are preferably nearly equal, but the lengths may also differ. It is understood that the shape of the lower uncompressed portion 42 is not limited to a regular diamond shape, and the portion can also be in the shape of any other diamond shape. In addition, the length L and the length D1 are preferably nearly equal, and the width B and the length D2 are almost equal, as described above in this embodiment of the present invention, but the present invention is not limited thereto.

[0079]

The embossed lines 31, 41 formed in the absorbent members 30, 40 are preferably formed over a large area in the longitudinal direction in order to provide a diffusional flow of the biological fluid excreted near the perineal region to the front and rear over a large area. In particular, the longitudinal length of the embossed portions 31, 41 is preferably 60% or more of the longitudinal length of the absorbent elements 30, 40, in particular preferably 60 to 100%, 70 to 100%, or 80 to 100%. The embossed lines 31, 41 in the absorbent members 30, 40 are preferably formed over a large area in the transverse direction to ensure the spread over a large area of the biological fluid excreted in the vicinity of the center in width and outwardly in the lateral direction. In particular, the maximum width of the embossed portions 31, 41 is preferably 60% or more of the minimum width of the absorbent elements 30, 40, in particular preferably 60% to 100%, 70% to 100% or 80% to 100 %.

[0080]

In this embodiment, the upper embossing lines 31 are in the form of a netted pattern of regular squares in which the area of the uncompressed portion is relatively large, and the lower embossed lines 41 are in the form of a grid pattern of regular rhombuses in which the area of the uncompressed portion is relatively small. However, the patterns of the embossed lines can be interchanged between the upper embossed lines 31 and the lower embossed lines 41. In particular, the regular square of the structure can be applied in the implementation of the structure of the lower embossed lines 41, while the mesh structure of the regular rhombuses can be applied in executing the structure of the upper extruded lines 31.

[0081]

In the drawings, an example is illustrated in which the embossed lines 31, 41 are made by embossing grooves both in the absorbent materials 34, 44 and in the core wrap sheets 35, 45 which are part of the absorbent members 30, 40. However, the embossed lines 31 , 41 can be made by indenting and grooving at least in the absorbent materials 34, 44. It is meant that after applying a compressive force to the absorbent materials 34, 44 to form the embossed lines 31, 41, the wrapping sheets 35, 45 the central layer may be attached to cover the absorbent material 34, 44. In this case, the embossed lines 31, 41 are formed at least in the absorbent material 34, 44 forming the absorbent members 30, 40.

[0082]

[2. Second Embodiment of the Present Invention] Next, a description will be made of an absorbent article according to a second embodiment of the present invention of the first invention with reference to FIG. 6-8. With respect to the second embodiment of the present invention, the description of components similar to those in the first embodiment of the present invention is omitted, but description is mainly given of components different from those in the first embodiment of the present invention.

[0083]

FIG. 6 (a) and 6 (b) illustrate the upper absorber 30 and the lower absorber 40 separately, and FIG. 6 (c) and 6 (d) illustrate the upper absorber 30 and the lower absorber 40 in cross-section along the line VI-VI. FIG. 7 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 7 (b) illustrates the overlapping absorbent elements in cross section along line VII-VII. FIG. 8 is an enlarged view of the pattern of embossed lines 31 provided in the upper absorber 30 and the pattern of embossed lines 41 provided in the lower absorber 40. FIG. 6 and 7, only the upper absorbent 30 and the lower absorbent 40 are conceptually illustrated. Although FIG. 6 and 7, other components are not illustrated as was done with respect to the first embodiment of the present invention, the second embodiment of the present invention includes at least a topsheet 10 and a backsheet 20, and may further include a pair of three-dimensional diaper frills 50 and a topsheet. 60.

[0084]

The second embodiment of the present invention differs from the first embodiment of the present invention in terms of structures of embossed lines 31, 41 formed in the absorbent members 30, 40. As illustrated in FIG. 6-8, the upper absorbent member 30 includes upper embossed lines 31 in a netted pattern of regular rhombuses, and the lower absorbent member 40 includes lower embossed lines 41 in a netted regular square pattern. The regular diamond mesh and the regular square mesh are basically the same as in the first embodiment described above. However, in the second embodiment of the present invention, when the upper absorber 30 overlaps the lower absorber 40, the relative position of the net structure of regular diamonds in the upper absorber 30 and the net structure of regular squares in the lower absorber 40 differs from the relative position shown in the first example. implementation of the present invention.

[0085]

As illustrated in FIG. 7 and 8, in the second embodiment of the present invention, when the absorbent members 30, 40 are overlapped, the upper intersection points 33 in the upper absorbent member 30 and the lower intersection points 43 in the lower absorbent member 40 overlap. In addition, some of the plurality of upper intersection points 33 in the upper absorber 30 overlap the center (point of intersection of the diagonal lines) of the lower unpressed portion 42 in the lower absorber 40. Specifically, in the overlapping portion in which the pattern of upper embossed lines 31 in the upper of the absorbent member 30 and the structure of the lower embossed lines 41 in the lower absorbent member 40 overlap each other, the upper points of intersection 33 fit into all the lower unpressed portions 42. Thus, in the second embodiment of the present invention, the upper embossed lines 31 overlap the positions corresponding to the positions of the diagonal lines in the lower uncompressed areas 42 in the form of a regular square. In addition, in the second embodiment of the present invention, the lower embossed lines 41 overlap the upper uncompressed portions 32.

[0086]

Thus, in the second embodiment, the lower embossed lines 41 overlap the upper unpressed portions 32, the upper embossed lines 31 and the upper intersections 33 overlap the lower uncompressed portions 42, and the upper intersections 33 and the lower intersections 43 overlap each other. Thus, the biological fluid, having leaked along the upper extruded lines 31 in the upper absorbing element 30, flows down to the lower absorbing element 40 and is absorbed in the lower uncompressed regions 42. The biological fluid remaining at the upper intersection points 33 in the upper absorbing element 30 flows down to the lower absorbing element 30 the element 40 and leaks along the lower extruded lines 41 through the lower intersection points 43. Further, the biological fluid leaked along the lower extruded lines 41 in the lower absorber 40 is absorbed in the upper uncompressed portions 32 of the upper absorber 30. The lower extruded lines 41 allow the biological fluid seep in the directions of the diagonal lines of the mesh structure of the upper extruded lines 31. Thus, the formation of this structure allows the biological fluid to be quickly directed to the uncompressed areas 32, 42, for which, in normal cases, a certain time.

[0087]

Thus, the structure in the second embodiment of the present invention is characterized by a higher rate of absorption of biological fluid compared to the structure in the first embodiment of the present invention. On the other hand, the structure in the first embodiment of the present invention has a larger diffusion area of the biological fluid compared to the area of the structure in the second embodiment of the present invention. The decision as to which of the structures shown in the first embodiment of the present invention or in the second embodiment of the present invention is intended to be used can be made, if necessary, taking into account the required technical functional characteristics of the absorbent pad.

[0088]

The widths of the embossed lines 31, 41, the longitudinal length D1 of the diagonal line of the upper unpressed portion 32, the lengths of the diagonal line in the transverse direction of the upper unpressed portion 32, the longitudinal length L and the width B of the lower unpressed portion 42 are preferably in the same ranges as the values width and length in the first embodiment of the present invention.

[0089]

[3. Third embodiment of the present invention]

The following is a description of an absorbent article according to a third embodiment of the present invention of the first invention with reference to FIG. 9 and 10. FIG. 9 (a) and 9 (b) illustrate the upper absorbent member 30 and the lower absorbent member 40 separately, and FIG. 9 (c) and 9 (d) illustrate the upper absorbent 30 and the lower absorbent 40 in cross-section along the line IX-IX. FIG. 10 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 10 (b) illustrates the overlapping absorbent elements in cross-section along the line X-X. FIG. 9 and 10, only the upper absorbent 30 and the lower absorbent 40 are conceptually illustrated. The third embodiment of the present invention includes at least a topsheet 10 and a backsheet 20, although they are not illustrated in the drawing as in the first embodiment of the present invention. and the third embodiment of the present invention may further include a pair of three-dimensional diaper ruffles 50 and a topsheet 60.

[0090]

In the third embodiment of the present invention, the upper absorbent member 30 includes a plurality of upper embossed lines 31 extending in the longitudinal direction. In the illustrated example, the upper absorbent member 30 includes a center embossing line 31a located at the center in width, a left embossing line 31b located on the left side, and a right embossed line 31c located on the right side. The embossed lines 31a, 31b and 31c extend from the front through the crotch to the rear of the upper absorbent 30. The center embossed line 31a is perfectly longitudinally straight. On the other hand, both the left embossed line 31b and the right embossed line 31c are divided into a front rectilinear portion 31d located at the end on the front portion 1 side, and a rear rectilinear portion 31e located at an end on the rear portion side, and a crotch rectilinear a portion 31f located in the crotch region 3 closer to the inner portion in the lateral direction than the front rectilinear portion 31d and the rear rectilinear portion 31e. Both the left embossing line 31b and the right embossing line 31c further include a front inclined portion 31g that slopes to connect the front rectilinear portion 31d and the rectilinear crotch portion 31f, and a rear sloped portion 31h that slopes to connect the rear rectilinear part 31e and crotch rectilinear part 31f. Thus, the center embossing line 31a and the left and right embossed lines 31b, 31c are spaced apart from each other on the front side and on the rear side, and are relatively close to each other in the crotch portion. The perineal part of the upper absorbing element 30 is a part in contact with the biological fluid excreted in the perineal region of the user, and, therefore, when the distance between the extruded lines 31 in this part is reduced, the biological fluid is freely distributed in the longitudinal direction. In this embodiment of the present invention, the upper absorbent member 30 does not include embossed lines extending in the transverse direction. Thus, the upper absorber 30 does not include the intersection points of the embossed lines.

[0091]

On the other hand, the lower absorbent member 40 includes a plurality of lower embossed lines 41 extending in the lateral direction. In the illustrated example, the lower absorbent member 40 includes rectilinear lower embossed lines 41 extending laterally at equal longitudinal intervals from front to rear. In this embodiment of the present invention, the lower absorbent member 40 does not include embossed lines extending in the longitudinal direction. Thus, the lower absorber 40 does not include the intersection points of the embossed lines.

[0092]

When the upper absorber 30 and the lower absorber 40 overlap in the thickness direction, as illustrated in FIG. 10, the upper embossed lines 31 in the upper absorber 30 and the lower embossed lines 41 in the lower absorber 40 intersect each other. Thus, as a result of the intersection of several upper extruded lines 31 running in the longitudinal direction, with the extruded lines in the other absorbent element, running in the transverse direction, leakage of the body fluid is ensured both in the longitudinal direction and in the transverse direction. In particular, it is unlikely that the body fluid will spread in the longitudinal direction, and it is likely that the fluid will flow from the ends as seen in the transverse direction. Thus, the upper extruded lines 31 extending in the longitudinal direction are formed in the upper absorber 30, and the lower extruded lines 41 extending in the transverse direction are formed in the lower absorber 40. This ensures that the biological fluid in contact with the upper the absorbing element 30 in the longitudinal direction and the spread of the biological fluid that has leaked through the lower absorbing element 40, further in the transverse direction. As a result, it is possible to effectively diffuse the body fluid in the longitudinal direction and prevent the body fluid from flowing from the ends as seen in the transverse direction.

[0093]

[4. Examples of cross-sectional shapes of absorbent elements]

In the first, second and third embodiments of the present invention, the embossed lines 31, 41 are formed by embossing grooves on the skin-facing side of the upper absorbent member 30 and the lower absorbent member 40 as an example. However, the present invention is not limited to the above forms. Below is a description of other examples of cross-sectional shapes of the absorbent members.

[0094]

FIG. 11 illustrates an example of the cross-sectional shapes of the upper absorber 30 and the lower absorber 40. In the example of FIG. 11 (a) the embossed lines 31 in the upper absorbent member 30 are formed by embossing grooves on the non-skin side, and the embossed lines 41 in the lower absorbent member 40 are formed by embossing the grooves on the skin facing side. Thus, the embossed lines 31, 41 are formed on opposite sides of the upper absorber 30 and the lower absorber 40. As a result, a gap is formed between the upper absorber 30 and the lower absorber 40 in the areas with the embossed lines 31, 41. Thus, biological liquid drained from the upper absorber 30 onto the lower absorber 40 can spread over a large area of the lower absorber 40.

[0095]

In the example of FIG. 11 (b) the embossed lines 31 in the upper absorber 30 are formed by embossing grooves on both the skin-facing side and the non-skin side, and the embossed lines 41 in the lower absorber 40 are formed by embossing grooves on the skin facing side only ... As a result, the extrusion of the grooves on both the skin-facing and non-skin-facing sides of the upper absorbent 30 allows for a larger gap between the upper absorbent 30 and the lower absorbent 40, while maintaining the diffusion mobility of the biological fluid on the surface of the upper absorbing element 30. Thus, the spread of the biological fluid over a large area of both the upper absorbing element 30 and the lower absorbing element 40 is ensured.

[0096]

In the example of FIG. 11 (c) the embossed lines 31 in the upper absorber 30 are formed by embossing recesses on both the skin-facing side and the non-skin side, and the embossed lines 41 in the lower absorber 40 are also formed by embossing recesses on both the skin-facing side side and non-skin side. Thus, as in the example in FIG. 11 (b), it is possible to create a larger gap between the upper absorber 30 and the lower absorber 40, while maintaining the diffusion mobility of the biological fluid on the surface of the upper absorber 30. In addition, the formation of grooves on both the skin-facing side and on the non-skin-facing side of the lower absorbent 40 allows body fluid to efficiently leak onto the rear side of the lower absorbent 40 while maintaining diffusion mobility on the surface of the lower absorbent 40. Thus, the back sheet 20 (see Fig. 2) is located on the rear side of the lower absorber 40. In addition, creating a gap between the lower absorber 40 and the backsheet 20 allows the biological fluid reaching the backsheet 20 to diffuse through the extruded lines 41 in the lower absorber 40 and absorption on the rear side of the lower absorber40. Thus, the biological fluid can be absorbed over the entire area of the upper absorber 30 and the lower absorber 40.

[0097]

In the example of FIG. 11 (d) the embossed lines 31 in the upper absorbent member 30 are formed by embossing grooves on the skin-facing side, and the embossed lines 41 in the lower absorber 40 are formed by embossing the notches on the non-skin side. Thus, the upper absorber 30 and the lower absorber 40 are joined together with virtually no gap between them. Thus, the upper absorber 30 and the lower absorber 40 can be joined together without creating a gap therebetween.

[0098]

FIG. 12 illustrates an example of an absorbent pad which alternatively includes an additional absorbent member 70 (third absorbent member) as well as an upper absorbent member 30 and a lower absorbent member 40. In the example of FIG. 12, the additional absorbent 70 is located on the skin-facing side of the upper absorbent 30, i. E. between the upper absorber 30 and the topsheet 10 (see Fig. 2). In this case, the additional absorbent member 70 can be located on the non-skin-facing side of the lower absorbent member 40, i.e. between the lower absorbent member 40 and the backsheet 20 (see Fig. 2). The additional absorbent member 70 preferably includes a plurality of embossed lines 71 as well as the upper absorbent member 30 and the lower absorbent member 40. The embossed lines 71 may be formed by embossing grooves on the skin-facing side of the additional absorbent member 70, as illustrated in FIG. 12, or grooves may be provided on the non-skin-facing side of the additional absorbent member 70. There is no particular limitation on the pattern of the embossed lines 71 in the additional absorbent member 70, however, the patterns of the embossed lines described above with respect to the first, second and third example implementation of the present invention may be applicable based on specific conditions. Although the drawings do not illustrate additional absorbent members, one or more absorbent members may overlap each other in addition to the additional absorbent member 70.

[0099]

The description of the embodiments of the present invention has been given with reference to the drawings in order to clearly set forth the contents of the present invention. However, the present invention is not limited to the above embodiment, but includes modified embodiments of the present invention and improved embodiments of the present invention that are obvious to those skilled in the art based on the spirit of the invention described herein.

[0100]

For example, the embossed lines in the above-described mesh structures in relation to the first embodiment of the present invention and the second embodiment of the present invention may be combined with the embossed lines described above extending in the longitudinal direction or laterally in relation to the third embodiment of the present invention. In particular, one of the two layered absorbent elements may include a plurality of non-compressed portions surrounded by embossed lines, while the second absorbent may include a plurality of embossed lines extending longitudinally or laterally. For example, the top absorbent 30 may include embossed lines in the grid pattern of squares illustrated in FIG. 3 (a), and the lower absorbent member 40 may include a plurality of embossed laterally extending lines illustrated in FIG. 9 (b), or it is possible that the structures are swapped. In addition, for example, the upper absorbent member 30 may have a plurality of embossed lines extending in the longitudinal direction illustrated in FIG. 9 (a), and the lower absorbent member 40 may have embossed lines in the diamond mesh pattern illustrated in FIG. 3 (b), or it is possible that the structures are swapped.

[0101]

[II. Second invention]

A description of the configuration of the present invention for solving the second object (second invention) will be made with reference to FIG. 13-26. The following will not describe the components identical to those of the first invention with respect to the second invention, and mainly the differences from the first invention will be described.

[0102]

[1. First embodiment of the present invention]

An absorbent article according to a first embodiment of the present invention of the second invention will be described with reference to FIG. 13-16. The absorbent pad in accordance with the third embodiment of the present invention is made in the form of a large urological pad. FIG. 13 is a plan view of the entire absorbent pad 100, and FIG. 14 is a diagram illustrating cross-sectional shapes of the absorbent liner 100 illustrated in FIG. 13 along the line XIV-XIV. In the cross-sectional view of FIG. 14, the various sub-assemblies are illustrated with gaps between them to better understand the configuration of the absorbent liner 100. However, in reality, there are no gaps between the sub-assemblies.

[0103]

As illustrated in FIG. 13, the absorbent pad 100 may be longitudinally divided into a front portion 1 located on the abdomen of the wearer, a rear portion 2 located on the lower back of the wearer, and a crotch portion 3 located between the front and rear portions. In particular, the absorbent liner 100 may be pumpkin-shaped or hourglass-shaped as shown in a plan view. In this respect, the second invention is identical to the first invention.

[0104]

As illustrated in FIG. 13 and 14, the absorbent sheet 100 includes a generally liquid-permeable topsheet 10, a liquid-impermeable backsheet 20, and a plurality of absorbent members 30, 40 interposed between said sheets. Hereinafter, the absorbent member disposed on the topsheet 10 side is called the "upper absorbent member 30" (first absorbent member), and the absorbent member disposed on the backsheet 20 side is called the "lower absorbent member 40" (second absorbent member). As illustrated in the cross-sectional view of FIG. 14, the upper absorbent 30 and the lower absorbent 40 overlap each other in the thickness direction. The upper absorbent member 30 and the lower absorbent member 40 are glued together with an adhesive such as hot melt adhesive so as to prevent the two absorbent members from displacing displacement. The topsheet 10 covers the skin-facing side of the laminated absorbers 30, 40, and the backsheet 20 covers the non-skin-facing side of the laminated absorbers 30, 40. As illustrated in FIG. 13 and 14, the topsheet 10 and the backsheet 20 are glued together around the absorbent members 30, 40 with hot melt glue, heat sealing or ultrasonic welding. Thus, the absorbent members 30, 40 are surrounded by welded portions of the topsheet 10 and the backsheet 20. A pair of three-dimensional diaper ruffles 50 are formed on the right and left sides of the absorbent pad 100 as seen in the lateral direction. A pair of three-dimensional diaper frills 50 are provided on both the right and left sides of the absorbent members and act as a leakage barrier to prevent urine from leaking. The absorbent liner 100 may further include a cover sheet 60 that covers the non-skin-facing side of the backsheet 20. The basic element configurations (10, 20, 30, 40, 50, 60) of the absorbent core 100 are identical to the element configurations in the first invention.

[0105]

FIG. 15 (a) and 15 (b) are plan views of the upper absorber 30 and the lower absorber 40, which are conceptually separated and laterally positioned relative to each other. FIG. 15 (c) and 15 (d) schematically illustrate the cross-sectional shapes of the absorbent members 30, 40 along the line XV-XV. FIG. 16 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 16 (b) schematically illustrates the cross-sectional shapes of the overlapping absorbent members along the line XVI-XVI.

[0106]

As illustrated in FIG. 13-16, the upper absorbent member 30 includes a slit 36 penetrating in the thickness direction. In this exemplary embodiment, the slit 36 is elongated and nearly elliptical, with the slit positioned longitudinally centered on the crotch portion 3 of the absorbent pad 100. The slit 36 is formed as an opening with both longitudinal end portions closed. At least a portion of the slit 36 is located at the crotch portion 3 of the absorbent pad 100 and may extend longitudinally from the crotch portion 3 to the front portion 1 and the rear portion 2.

[0107]

FIG. 15 illustrates the longitudinal length of the slot 36, indicated by the reference numeral S1, and illustrates the widthwise length (width) of the slot 36, indicated by the reference numeral S2. For example, the length S1 of the slit 36 may be 20% to 100%, or 25% to 80% with the total longitudinal length of the upper absorbent member 30 being 100%. In addition, the width S2 of the slit 36 may be 10% to 50%, or 15% to 30% when the widthwise length (width) of the upper absorber 30 (if there is a part with a large width and a part with a small width, a minimum value applies) is 100%. The slit 36 is for guiding the body fluid towards the lower absorbent member 40, and therefore the slit width S2 is preferably 5 mm or more.

[0108]

In this embodiment, the upper absorber 30 is provided with a plurality of embossed lines 31. The multiple embossed lines 31 in the upper absorber 30 (hereinafter referred to as "upper embossed lines") may be formed by partially pressing and compressing the upper absorber 30 on both or one of the sides facing the skin and the sides not facing the skin. Thus, the density of the absorbent 34 is increased in the areas of the upper absorbent 30 with the upper embossed lines 31. In this embodiment, the upper embossed lines 31 are formed by pressing the upper absorbent 30 on the skin-facing side.

[0109]

The plurality of upper extrusion lines 31 include a center extrusion line 31a located centrally in the width, a left extrusion line 31b located on the left side, and a right extrusion line 31c located on the right side on each side of the front portion 1 and the rear portion 2. In the illustrated the example has a total of six extruded lines completed. Several upper extruded lines 31 include portions located in the longitudinal direction of the upper absorber 30. Thus, the biological fluid in contact with the upper absorber 30 spreads along the upper extruded lines 31 in the longitudinal direction. In particular, each of the center embossed lines 31a on the front and rear sides extends straight in the longitudinal direction and is provided with one end portion reaching the longitudinal end edge of the upper absorbent member 30 and a second end portion reaching the slot 36. Each of the left embossed lines 31b and right of the embossed lines 31c on the front and rear sides includes a straight portion 37a extending from the longitudinal annular edge of the upper absorbent member 30 towards the crotch portion 3 side, and an inclined portion 37b extending obliquely toward the inner part in width and connecting the straight portion 37a and the slot 36.

[0110]

Thus, in this embodiment of the present invention, all of the several upper extruded lines 31 are connected to the slot 36. Thus, the biological fluid, after excretion from the perineum of the user, is first directed into the slot 36 and temporarily held there, and then spreads longitudinally along the upper extruded lines 31 connected to the slit 36. Thus, the slit 36 and the upper extruded lines 31 together form a plurality of paths for the liquid to propagate. This ensures the absorption of the biological fluid over the entire area of the upper absorbing element 30, increases the absorption capacity and the rate of absorption, and also provides a more reliable prevention of the flow of biological fluid to the outside. In addition, the slot 36 is connected to a plurality of upper extruded lines 31, and therefore, the body fluid temporarily trapped in the slot 36 can easily spread along the upper extruded lines 31. In particular, the body fluid can spread from the inner surface of the wall of the slot 36 along the upper embossed lines 31, which increases the diffusion mobility of the biological fluid in the upper absorber 30. In this embodiment, the upper absorber 30 does not include the embossed lines running in the transverse direction. Thus, the upper absorber 30 does not include the intersection points of the embossed lines.

[0111]

The lower absorbent 40 includes several embossed lines 41. The multiple embossed lines 41 in the lower absorbent 40 (hereinafter referred to as "lower embossed lines") may be formed by partially pressing and compressing the upper absorbent 40 on both or one of the skin-facing sides and sides not facing the skin. Thus, the density of the absorbent 44 increases in the portions of the lower absorbent 40 with the lower embossed lines 41. In this embodiment, the lower embossed lines 41 are formed by pressing the lower absorbent 40 on the skin-facing side.

[0112]

In the present invention, a plurality of bottom embossed lines 41 in the lower absorbent 40 extend in the lateral direction of the absorbent pad 100. In the illustrated example, the lower absorbent 40 includes rectilinear lower embossed lines 41 in the lateral direction at equal longitudinal intervals from front to rear. ... In this embodiment of the present invention, the lower absorbent member 40 does not include embossed lines extending in the longitudinal direction. Thus, the lower absorber 40 does not include the intersection points of the embossed lines.

[0113]

FIG. 15 illustrates the width-to-width length (width) of the lower extruded lines 41, indicated by the reference numeral W. The lower extruded lines 41 are intended to diffuse the biological fluid in contact with the lower absorber 40 over a large area in the lateral direction of the lower absorber 40. Thus, the width W of the lower embossed lines 41 is preferably 50% to 100% or 70% to 95% when the width across the width (width) of the lower absorber 40 (in the case of a part with a large width and a part with a small width, the minimum value applies) is 100% ... The width W of the lower embossed lines 41 is preferably greater than the width S2 of the slot 36 in the upper absorber 30 (W> S2). In particular, the width W of the lower embossed lines 41 is preferably 110% or more, 150% or more, 200% or more, or 250% or more of the width S2 of the slot 36. There is no particular limitation on the width W of the lower embossed lines 41 with respect to the width S2 of the slot 36, but the width W may be ten times the width S2.

[0114]

FIG. 16 illustrates the overlapping upper absorber 30 and the lower absorber 40 in the thickness direction. As illustrated in FIG. 16, the lower extruded lines 41 in the lower absorber 40 overlap the slot 36 in the upper absorber 30. Thus, when the body fluid is directed towards the slot 36 in the upper absorber 30, the body fluid flows downward through the slot 36 and contacts the lower extruded lines 41 in the lower absorbent member 40. Then, the biological fluid, upon contact with the lower absorbent member 40, spreads laterally along the lower extruded lines 41. In particular, in this embodiment, the width W of the lower extruded lines 41 is greater than the width S2 of the slot 36, as described above. Thus, the biological fluid, upon contact with the lower absorbent member 40 through the slot 36, seeps out laterally along the lower extruded lines 41 and enters the gap between the upper absorbent member 30 and the lower absorbent member 40. Thus, the biological fluid can also be absorbed at the rear the side (non-skin side) of the upper absorbent member 30. This ensures rapid absorption of biological fluid and an increase in the amount of absorbed fluid.

[0115]

The slit 36 in the upper absorbent member 30 is not capable of absorbing bodily fluid vertically from the crotch portion 3 and directing it towards the front 1 side or the rear 2 side when the user is, for example, in a standing position, however, the upper extruded lines 31 and the lower the extruded lines 41 are capable of absorbing biological fluid vertically. Thus, the connection of the upper extruded lines 31 with the slot 36 in the upper absorber 30 or the execution of the lower extruded lines 41 under the slot 36 makes it possible to absorb the biological fluid temporarily remaining in the slot 36 upward in the vertical direction and to spread the liquid over a large area towards the side front 1 and rear side 2.

[0116]

For a better understanding of the method of the present invention, below is a more detailed description of the principle of absorption of body fluid by embossed lines. In the process of absorption of biological fluid, the absorbing element is characterized by both the first diffusion effect, in which the biological fluid flows and spreads along the grooves in the extruded lines, and the second diffusion effect, in which the absorbing material is denser around the extruded lines than in the area without extruded lines and creates capillary effect, ensuring the percolation of biological fluid along the extruded lines. The first diffusion effect is a dynamic phenomenon in which the diffusion rate is high in the horizontal direction, but the effect of absorption of the biological fluid in the vertical direction is excluded. On the other hand, with the second diffusion effect resulting from the capillary effect around the extruded lines, the amount of leaking fluid is less than with the first diffusion effect, however, this creates the effect of absorption of the biological fluid vertically along the extruded lines, therefore, the extruded lines made in the absorbing element capable of absorbing biological fluid in the vertical direction. The situation in which the body fluid is absorbed vertically means that when the user is in a standing position, urine held in the crotch portion is absorbed upward towards the front and rear.

[0117]

The large urological pad is equipped with an exceptionally long absorbent element, characterized by a large distance from the point of excretion to the ends. When urine is absorbed at the site of its emission, the absorbing element is not used over the entire area, as a result of which urine leakage occurs during repeated urination. Thus, a large urological pad is needed to absorb a large amount of urine in the center and from the center to the ends of the absorbent members. Moreover, a large urological pad is not only necessary to absorb an extremely large amount of urine, but also must have a high fluid absorption rate. These properties will allow the wearer to feel comfortable wearing the pad even after urinating. The absorbent element is generally thicker and is generally made by stacking two or more absorbent elements in layers. In order to increase the absorption rate, a known method is used, which consists in making a slit in the upper absorbing element. In addition, a method is known for further increasing the diffusion mobility of a liquid by making a slit in the lower absorber in a position where the slit is aligned with the slit in the upper absorber. These slots are effective for creating a pathway for the body fluid and temporarily retaining the body fluid in the slot, but the slots are less effective in permeating fluid after it has passed through this path. Thus, in the present invention, a slit 36 is formed in the upper absorber 30 in order to increase the leakage rate and increase the amount of body fluid, and the lower extruded lines 41 are formed in the lower absorbent member 40 to allow the body fluid to leak through the capillary effect, thereby allowing the biological fluid to spread over a large area of the absorbing elements 30, 40.

[0118]

Thus, the present invention provides for a combination of the advantages of both the slit 36 in the upper absorber 30 and the lower extruded lines 41 in the lower absorber 40 in order to increase the diffusion rate, the amount of diffused liquid and the diffusion area of the biological fluid. Thus, it is preferable that the slit is not formed at least in the portion of the lower absorber 40 overlapping the slit 36 in the upper absorber 30. When the slit is made in the lower absorber 40 at a position overlapping the slit 36 in the upper absorber 30, the lower embossed lines 41 in the lower absorber 40 will not be able to sufficiently create a liquid diffusion effect. However, the present invention does not exclude the option of making a slot in the lower absorber 40.

[0119]

As illustrated in FIG. 16, when the upper absorber 30 and the lower absorber 40 overlap, the upper extrusion lines 31 and the lower extrusion lines 41 intersect each other, at least when viewed from the plane direction. The phrase "viewed in a plane direction" means looking in the direction opposite to the top sheet 10 or back sheet 20. Thus, the arrangement of the absorbent elements 30, 40 with the embossed lines 31, 41 crossing each other allows the body fluid to efficiently seep even through areas without extruded lines (uncompressed areas). It means that the biological fluid spread along the extruded lines in one of the absorbing elements can be effectively absorbed in the uncompressed area of the other absorbing element. Thus, there is a low likelihood that the body fluid dispersed along the extruded lines in one absorbent member will reach the end portions, thereby effectively preventing the body fluid from leaking outward. The two absorbent members 30, 40 are capable of absorbing a body fluid over a large area, which makes it possible to increase the ability to absorb body fluid without causing the user to feel uncomfortable for a long period of time. The formation of embossed lines 31, 41 in the two absorbent members 30, 40 eliminates the need to form densely spaced embossed lines in each of the absorbent members. This eliminates the creation of a rough texture of absorbing elements.

[0120]

The thickness of the absorbent elements 30, 40, i.e. the thickness of the uncompressed portions is preferably from 5 mm to 20 mm, for example, in particular, preferably from 8 mm to 15 mm. The thickness of the absorbent elements 30, 40 in the areas with embossed lines 31, 41 is preferably 1 mm to 10 mm, in particular preferably 2 mm to 5 mm. Generally, however, the embossed portions 31, 41 are thinner than the uncompressed portions. For example, the thickness of the embossed portions 31, 41 is preferably from 3% to 50% of the thickness of the uncompressed portions, in particular preferably from 5% to 20%. The width of the embossed lines 31, 41 is preferably 1 mm to 5 mm, in particular, preferably 2 mm to 4 mm.

[0121]

In the diagrams contained in this application, by way of example, the embossed lines 31, 41 are made by embossing grooves both in the absorbent materials 34, 44 and in the core wrap sheets 35, 45 forming part of the absorbent elements 30, 40. However the embossed lines 31, 41 may be formed by compressing and extruding grooves in at least the absorbent materials 34, 44. Thus, after compressing the absorbent materials 34, 44 to create the embossed lines 31, 41, the core wrap sheets 35, 45 can be joined to cover the absorbent material 34, 44. In this case, the embossed lines 31, 41 are formed at least in the absorbent material 34, 44 forming the absorbent members 30, 40.

[0122]

[2. Second embodiment of the present invention]

The following is a description of an absorbent article according to a second embodiment of the second invention with reference to FIG. 17 and 19. For the second embodiment of the present invention, the description of the components of the first embodiment of the present invention is omitted, but the description is mainly made of components different from those of the first embodiment of the present invention.

[0123]

FIG. 17 (a) and 17 (b) illustrate plan views of an upper absorber 30 and a lower absorber 40, which are conceptually separated and laterally positioned relative to each other. FIG. 17 (c) and 17 (d) schematically illustrate the cross-sectional shapes of the absorbent members 30, 40 along the line V-V. FIG. 18 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 18 (b) schematically illustrates the cross-sectional shapes of the overlapping absorbent members along the line VI-VI. FIG. 19 illustrates the structure of the embossed lines 31 provided in the upper absorber 30 and the structure of the embossed lines 41 provided in the lower absorber 40. FIG. 17 and 18, conceptually only the upper absorbent 30 and the lower absorbent 40 are illustrated. While FIG. 17 and 18, other components are not illustrated, as was the case with the first embodiment of the present invention, the second embodiment of the present invention includes at least a topsheet 10 and a backsheet 20, and may further include a pair of three-dimensional diaper frills 50 and a topsheet 60.

[0124]

As illustrated in FIG. 17, the present invention is characterized by the structure of the upper embossed lines 31 provided in the upper absorber 30 and the structure of the lower embossed lines 41 provided in the lower absorber 40. The embossed lines 31, 41 formed in the absorbent members 30, 40 are structured in such a way that they intersect each other at least partially when viewed in the direction of the plane. Below is a detailed description of the structures of the embossed lines 31, 41.

[0125]

As illustrated in FIG. 17, the upper absorber 30 includes upper embossed lines 31 in a grid pattern of squares. Here, a "grid pattern of squares" means that a structure in which a plurality of extruded lines running parallel in the longitudinal direction and a plurality of extruded lines running parallel in the transverse direction intersect each other to form square uncompressed portions. Specifically, in this exemplary embodiment, the upper embossed lines 31 are structured such that all uncompression portions 32 surrounded by the embossed lines 31 are in the shape of a regular square (in the form of a grid pattern of regular squares). In this regard, the upper absorber 30 can be considered to include several upper embossed lines 31, uncompressed portions 32 surrounded by upper embossed lines 31 (hereinafter referred to as "upper uncompressed portions"), and intersection points 33 at which the upper embossed lines 31 intersect each other (hereinafter referred to as "upper intersection points").

[0126]

On the other hand, the lower absorbent member 40 includes lower embossed lines 41 in the form of a mesh pattern of rhombuses. In this context, "diamond mesh" means a structure in which a plurality of embossed lines obliquely with respect to the longitudinal direction and in the transverse direction intersect each other to form rhombic-shaped uncompressed regions. Specifically, in this embodiment, the lower embossing lines 41 are structured such that all of the uncompressed portions 42 surrounded by the lower embossed lines 41 are in the shape of regular rhombuses (regular diamond mesh structure). As a result, the lower absorber 40 can be considered to include several lower extruded lines 41, uncompressed portions 42 surrounded by lower extruded lines 41 (hereinafter referred to as "lower uncompressed portions"), and intersection points 43 at which the lower extruded lines 41 intersect each other (hereinafter referred to as "lower intersection points").

[0127]

In this embodiment of the present invention, the upper extrusion lines 31 are formed by compressing and extruding grooves in the upper absorbent member 30 on the skin-facing side. Likewise, the lower embossed lines 41 are formed by compressing and embossing grooves in the lower absorbent member 40 on the skin-facing side. Thus, when the upper absorber 30 and the lower absorber 40 overlap, a gap is formed between the absorber in the areas of the lower absorber 40 with the embossed lines 41.

[0128]

FIG. 18 and 19 illustrate a regular square mesh structure of the upper embossed lines 31 and a regular diamond mesh structure of the lower embossed lines 41 overlapping each other. As can be seen in the figures, in this embodiment of the present invention, the area of the upper unpressed portion 32 exceeds the area of the lower unpressed portion 42. Thus, when the upper absorber 30 and the lower absorber 40 are superimposed, the lower uncompressed portion 42 (regular diamonds) fits into the upper uncompressed area 32 (regular square).

[0129]

The patterns of the embossed lines in the second invention illustrated in FIG. 17-19 are identical to the structures of the embossed lines in the first invention described above with reference to FIG. 3-5. Thus, the embossed line patterns in the first invention are applicable to the embossed line patterns in the second invention. The description of the embossed line patterns in the first invention may refer to the description of the embossed line patterns in the second invention, and therefore, detailed description thereof will be omitted here.

[0130]

In addition to the above described components, the upper absorbent member 30 includes a slot 36 as illustrated in FIG. 17. The slit 36 is elongated and nearly elliptical, with the slit positioned longitudinally centered on the crotch portion 3 of the absorbent pad 100. The slit 36 is formed as a hole, with both longitudinal end portions closed. The slit 36 is made in the form of a net structure of regular squares of the upper extrusion lines 31 and is connected to several upper extruded lines 31. In particular, the rectilinear upper extrusion lines 31 extending in the longitudinal direction of the absorbent liner are connected to both longitudinal ends of the slit 36. In addition, the rectilinear the upper extrusion lines 31 extending in the transverse direction of the absorbent pad are connected to both the right and left ends along the width of the slot 36. Thus, the biological fluid retained in the slot 36 diffuses along the upper extruded lines 31 in the longitudinal direction and in the transverse direction absorbent pad.

[0131]

Moreover, as illustrated in FIG. 18, when the upper absorber 30 and the lower absorber 40 are layered and then joined together, several lower extruded lines 41, several lower unpressed portions 42 and several lower intersections 43 in the lower absorber 40 overlap the slot 36 in the upper absorber 30. First, since the slit 36 and the lower extruded lines 41 overlap each other, the body fluid retained in the slot 36 diffuses along the lower extruded lines 41. In addition, since the slot 36 and the lower uncompressed portions 42 overlap each other, the absorption of the biological fluid, retained in the slot 36 can occur directly in the lower non-compressed regions 42. In addition, the lower intersection points 43 act as centers of concentration for the diffusion pathways of the biological fluid. Thus, the slit 36 and the lower intersection points 43 overlap each other so that the biological fluid spreads over a large area in the lower absorber 40 while passing the centers at the intersection points 43.

[0132]

In the present invention, the lower embossed lines 41 overlapping the slit 36 in the upper absorbent member 30 extend in an oblique direction (i.e., in a diagonal direction) with respect to both the longitudinal direction and the lateral direction of the absorbent pad. Thus, the biological fluid in contact with the lower extrusion lines 41 through the slot 36 diffuses in a diagonal direction along the lower extruded lines 41.

[0133]

In this embodiment of the present invention, the upper embossed lines 31 are in the form of a net structure of regular squares, in which the area of the unpressed area is relatively large, while the lower embossed lines 41 are in the form of a net structure of regular diamonds, in which the area of the unpressed area has relatively small size. However, the patterns of the embossed lines in the form of squares and rhombuses can be interchanged between the top embossed lines 31 and the bottom embossed lines 41. In particular, the pattern of regular squares can be applied to the pattern of the bottom embossed lines 41, while the grid structure of the regular rhombuses can be applicable to the structure of the upper extruded lines 31.

[0134]

[3. Third embodiment of the present invention]

The following is a description of an absorbent article according to a third embodiment of the second invention with reference to FIG. 20 and 22. With respect to the third embodiment of the present invention, no description will be given of those components described with respect to the first and second embodiments of the present invention, but rather a description will be given of components other than those described in the first and second examples of implementation of the present invention.

[0135]

FIG. 20 (a) and 20 (b) illustrate the upper absorbent 30 and the lower absorbent 40 separately, and FIG. 20 (c) and 20 (d) illustrate cross-sectional shapes of the upper absorber 30 and the lower absorber 40 along the line XX-XX. FIG. 21 (a) illustrates an overlapping upper absorber 30 and a lower absorber 40, and FIG. 21 (b) illustrates cross-sectional shapes of the overlapping absorbent members along line XXI-XXI. FIG. 22 is an enlarged view of the pattern of embossed lines 31 formed in the upper absorber 30 and the pattern of embossed lines 41 formed in the lower absorber 40. While certain components have not been illustrated in FIG. 20 and 21, as was done with respect to the first embodiment of the present invention, the third embodiment of the present invention includes at least a topsheet 10 and a backsheet 20, and may further include a pair of three-dimensional diaper frills 50 and a topsheet 60.

[0136]

The third embodiment of the present invention differs from the second embodiment of the present invention in terms of patterns of the embossed lines 31, 41 formed in the absorbent members 30, 40. As illustrated in FIG. 20-22, the upper absorber 30 includes upper embossed lines 31 in a netted pattern of regular rhombuses, while the lower absorber 40 includes lower embossed lines 41 in a netted regular square pattern. The regular diamond mesh and the regular square mesh are substantially identical to those shown in the second embodiment described above. Moreover, in the third embodiment of the present invention, when the upper absorbing element 30 and the lower absorbing element 40 are overlapped, the relative mutual position between them in the form of a net structure of regular rhombuses in the upper absorber 30 and in the form of a net structure of regular squares in the lower absorbing element 40 differs from the relationship in the second embodiment of the present invention.

[0137]

As illustrated in FIG. 21 and 22, in the third embodiment of the present invention, in the overlapping state of the members 30, 40, the upper crossing points 33 in the upper absorber 30 and the lower crossing points 43 in the lower absorbing member 40 overlap. In addition, some of the plurality of upper intersection points 33 in the upper absorber 30 overlap the central portion (crossing the point of the diagonal lines) of the lower non-compressed portion 42 in the lower absorber 40. In particular, the overlap portion in which the pattern of the upper embossed lines 31 in the upper absorbent element 30 and the structure of the lower embossed lines 41 in the lower absorber 40 overlap each other, the upper points of intersection 33 fit into all the lower unpressed portions 42 except for the notched portion 36. Thus, in the third embodiment of the present invention, the upper embossed lines 31 overlap positions corresponding to the diagonal lines in the lower unpressed portions 42 in a regular square shape, except for the slotted portion 36. In addition, in the third embodiment, the lower embossed lines 41 overlap the upper unpressed portions 32.

[0138]

Thus, in the third embodiment, the lower embossed lines 41 overlap the upper unpressed portions 32, the upper embossed lines 31 and the upper intersections 33 overlap the lower uncompressed portions 42, and the upper intersections 33 and the lower intersections 43 overlap each other. Thus, the biological fluid that has leaked along the upper extruded lines 31 in the upper absorber 30 flows down to the lower absorber 40 and is absorbed in the lower uncompressed regions 42. The biological fluid remaining at the upper intersections 33 in the upper absorber 30 flows down to the lower the absorber 40 and leaks along the lower extruded lines 41 through the lower intersection points 43. In addition, the body fluid leaked along the lower extruded lines 41 in the lower absorber 40 is absorbed in the upper uncompressed portions 32 of the upper absorber 30. The lower extruded lines 41 can to allow the body fluid to leak in the directions of the diagonal lines of the net structure of the upper extruded lines 31. Thus, the creation of this structure allows the body fluid to be quickly directed to the uncompressed areas 32, 42, while in the known diapers it is required there is a certain time.

[0139]

Thus, the structure in the third embodiment of the present invention is characterized by a high rate of absorption of the biological fluid as compared to the structure in the second embodiment of the present invention. On the other hand, the structure in the second embodiment of the present invention has a larger diffusion area of the biological fluid than the structure in the third embodiment of the present invention. The decision as to which of the structures shown in the second embodiment of the present invention or in the third embodiment of the present invention is intended to be used can be made, if necessary, taking into account the required technical functional characteristics of the absorbent pad.

[0140]

Moreover, as illustrated in FIG. 21, when the upper absorber 30 and the lower absorber 40 are laminated and connected, several lower extruded lines 41 and several lower non-pressed portions 42 in the lower absorber 40 overlap the slit 36 in the upper absorber 30. In a third embodiment of the present invention, the lower extruded lines 41 overlapping the slit 36 are located in the lateral direction of the absorbent pad. Thus, the biological fluid in contact with the lower extruded lines 41 through the slot 36 diffuses in a diagonal direction along the lower extruded lines 41.

[0141]

[4. Fourth embodiment of the present invention]

The following describes an absorbent article according to a fourth embodiment of the second invention with reference to FIG. 23 and 24. For the fourth embodiment of the present invention, the description will not be given of those components described in the previous embodiments of the present invention, but mainly the description will be given of components other than those described in the following embodiments of the present invention. FIG. 23 (a) and 23 (b) illustrate the upper absorber 30 and the lower absorber 40 separately, and FIG. 23 (c) and 23 (d) illustrate the cross-sectional shapes of the upper absorber 30 and the lower absorber 40 along the line XI-XI. FIG. 24 (a) illustrates the overlapping upper absorber 30 and the lower absorber 40, and FIG. 24 (b) illustrates the cross-sectional shapes of the overlapping absorbent members along the line XII-XII.

[0142]

As illustrated in FIG. 23, in the fourth embodiment of the present invention, the upper absorber 30 includes a slit 36 dividing the upper absorber 30 in the longitudinal direction. Thus, the slit 36 can be formed from one end to the other of the upper absorber 30 in the longitudinal direction. In addition, in the present invention, the upper absorbent 30 does not include embossed lines, while the lower absorbent 40 is provided with a plurality of embossed lines 41 in a diamond pattern. The structure of the embossed lines 41 in the lower absorber 40 is similar to the structure illustrated in FIG. 17 (b).

[0143]

As illustrated in FIG. 24, when the upper absorbent 30 and the lower absorbent 40 overlap one another, several of the lower extrusion lines 41, several of the lower non-compressed portions 42 and several lower intersections 43 in the lower absorbent 40 overlap the slot 36 in the upper absorbent 30. Bottom the embossed lines 41 overlapping the slit 36 extend in an oblique direction (meaning a diagonal direction) relative to both the longitudinal direction and the lateral direction of the absorbent article. Thus, the biological fluid in contact with the lower extruded lines 41 through the slot 36 diffuses obliquely along the lower extruded lines 41.

[0144]

[4. Examples of shapes of absorbent elements in cross section]

As an example, in the first to fourth embodiments of the present invention, the embossed lines 31, 41 are formed by embossing grooves on the skin facing sides of the upper absorbent member 30 and the lower absorbent member 40. However, the present invention is not limited to this example. Below is a description of other examples of cross-sectional shapes of the absorbent members.

[0145]

FIG. 25 illustrates an example of the cross-sectional shapes of the upper absorbent member 30 and the lower absorbent member 40. The configuration of the second invention illustrated in FIG. 25 is identical to the configuration of the first invention illustrated in FIG. 11. Thus, the above-described configuration of the first invention with reference to FIG. 11 can be applied to the configuration of the second invention. Description with reference to FIG. 11 is applicable to the configuration illustrated in FIG. 25, and its detailed description will be omitted here.

[0146]

FIG. 26 illustrates an example of an absorbent liner that also includes an additional absorbent member 70 (third absorbent member), as well as an upper absorbent member 30 and a lower absorbent member 40. In the example of FIG. 26, the additional absorbent member 70 is located on the non-skin-facing side of the lower absorbent member 40, i.e. between the lower absorbent member 40 and the backsheet 20 (see Fig. 14). The number of additional absorbent members 70 located below the lower absorbent member 40 is not limited to one, there may be two or more. The additional absorbent member 70 preferably includes a plurality of embossed lines 71, as does the upper absorbent member 30 and the lower absorbent member 40. The embossed lines 71 may be formed by embossing grooves on the skin-facing side of the additional absorbent member 70, as illustrated in FIG. 26, or grooves may be formed on the non-skin-facing side of the additional absorbent member 70. There is no particular limitation on the pattern of the embossed lines 71 in the additional absorbent member 70, however, the patterns of the embossed lines described above in relation to the above embodiments of the present invention are may be applicable based on specific conditions.

[0147]

The description of the embodiments of the present invention has been given with reference to the drawings in order to clearly set forth the contents of the present invention. However, the present invention is not limited to the above embodiment, but includes modified embodiments of the present invention and improved embodiments of the present invention that are obvious to those skilled in the art based on the spirit of the invention described herein.

[0148]

For example, the embossed lines extending in the longitudinal direction or in the transverse direction described above in relation to the first embodiment of the present invention may be combined with the embossed lines in the mesh structure described above in relation to the second embodiment of the present invention and the third embodiment of the present invention. In particular, one of the two layered absorbent members may include a plurality of non-compressed portions surrounded by embossed lines, and the other may include a plurality of embossed lines extending longitudinally or laterally. For example, the top absorbent 30 may include embossed lines in the grid pattern of squares illustrated in FIG. 17 (a), and the lower absorbent member 40 may include a plurality of embossed laterally extending lines illustrated in FIG. 15 (b), or it is possible that the structures are swapped. In addition, for example, the upper absorbent member 30 may include a plurality of embossed longitudinally extending lines illustrated in FIG. 15 (a), and the lower absorbent member 40 may have embossed lines in the pattern of the diamond pattern illustrated in FIG. 17 (b), or it is possible that the structures are swapped.

Industrial applicability

[0149]

The present invention relates to an absorbent pad such as a urological pad or a disposable diaper. An absorbent pad in accordance with the present invention is described herein as a urological pad. However, the present invention is not limited to this product, but also relates to a disposable pant diaper, a tape type disposable diaper and a sanitary napkin. Thus, the present invention is suitable for use in the manufacture of absorbent pads and other sanitary products.

List of reference positions

[0150]

10 Top sheet

20 Back sheet

30 Upper absorber (first absorber)

31 Upper extruded line

31a Center extrusion line

31b Left extruded line

31c Right extruded line

31d Front straight part

31e Back straight part

31f Straight crotch

31g Front ramp

31h Rear ramp

32 Upper uncompressed area

33 Upper Intersection Point

34 Absorbent Material

35 Insulating sheet

36 Slot

37a Straight part

37b Inclined part

40 Lower absorber (second absorber)

41 Bottom extruded line

42 Lower uncompressed area

43 Lower point of intersection

44 Absorbent Material

45 Insulating sheet

50 3D ruffles

51 Side sheet

52 Elastic stretch element

60 Cover sheet

70 Additional absorber (third absorber)

71 Extruded line

100 Absorbent pad

Claims (66)

1. An absorbent liner including a liquid-permeable topsheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which two absorbent elements (30, 40) include several embossed lines (31, 41), in which the absorbent elements are recessed, respectively, in the thickness direction, both or one of the two absorbing elements (30, 40) have a plurality of non-compressed areas (32, 42) surrounded by extruded lines (31, 41), respectively, the embossed lines (31, 41) in the two absorbent elements intersect each other at least partially when viewed in the plane direction, at least some of the embossed lines in one of the absorbent members overlap the uncompressed portions in the other absorbent member. 2. An absorbent pad according to claim 1, wherein two absorbing elements (30, 40) have several points of intersection (33, 43), at which the extruded lines (31, 41) intersect each other, respectively, and at least some of the intersection points in one of the absorbent members overlap the uncompressed portions in the other absorbent member. 3. An absorbent pad according to claim 2, wherein the points of intersection in one absorber and the points of intersection in the other absorber overlap at least partially. 4. An absorbent pad according to claim 1, wherein the two absorbent members are a first absorbent member (30) located on the topsheet (10) side and a second absorbent member (40) located on the backsheet (20) side, and the second absorber (40) includes embossed lines (41) in which at least the side surface of the first absorber (30) is recessed, and between parts of the second absorber (40) with embossed lines (41) and parts of the first absorber (30) a gap is made. 5. An absorbent pad according to claim 1, wherein the two absorbent members are a first absorbent member (30) located on the topsheet (10) side and a second absorbent member (40) located on the backsheet (20) side, and the first absorber (30) includes embossed lines (31), with at least the lateral surface of the second absorber (40) recessed, and between parts of the first absorber (30) with embossed lines (31) and parts of the second absorber (40) a gap is made. 6. An absorbent pad according to claim 1, wherein the embossed lines in one of the absorbent elements are located in the longitudinal direction of the absorbent pad, and the embossed lines in the other absorbent member are located in the transverse direction of the absorbent pad. 7. Absorbent pad, including liquid permeable top sheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which two absorbent elements (30, 40) include several embossed lines (31, 41), in which the absorbent elements are recessed, respectively, in the thickness direction, both or one of the two absorbing elements (30, 40) have several unpressed areas (32, 42) surrounded by extruded lines (31, 41), the embossed lines (31, 41) in the two absorbent elements intersect each other at least partially when viewed in the plane direction, the two absorbent members are a first absorbent member (30) located on the topsheet (10) side and a second absorbent member (40) located on the backsheet (20) side, The absorbent core further includes a third absorbent member (70) between the topsheet (10) and the first absorbent member (30) or between the backsheet (20) and the second absorbent member (40), and the third absorbent member (70) includes several embossed lines (71) in which the absorbent member is recessed in the thickness direction. 8. Absorbent pad, including liquid permeable top sheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which two absorbent elements (30, 40) include several embossed lines (31, 41), in which the absorbent elements are recessed, respectively, in the thickness direction, both or one of the two absorbing elements (30, 40) have several unpressed areas (32, 42) surrounded by extruded lines (31, 41), the embossed lines (31, 41) in the two absorbent elements intersect each other at least partially when viewed in the direction of the plane at which one of the absorbent elements includes several unpressed areas surrounded by extruded lines, and the embossed lines in the other absorbent member are located in the longitudinal direction of the absorbent pad or in the transverse direction of the absorbent pad. 9. Absorbent pad, including: liquid-permeable topsheet (10); a back sheet (20) and at least two absorbent elements (30, 40), stacked in layers and located between the top sheet (10) and the back sheet (20), in which the two absorbent members are an upper absorbent member (30) located on the top sheet (10) side and a lower absorbent member (40) located on the backsheet (20) side, the upper absorber (30) includes one or more slits (36) extending in the direction of the thickness of the absorber, the lower absorber (40) includes several embossed lines (41) in which the absorber is recessed in the thickness direction and several unpressed portions (42) surrounded by embossed lines (41), the slit (36) in the upper absorber (30) overlaps at least some of the embossed lines (41) in the lower absorber (40), a slot (36) in the upper absorbent member (30) is located in the longitudinal direction of the absorbent pad, and the slit (36) overlaps, out of the embossed lines (41) in the lower absorbent member (40), the embossed lines located in the transverse direction of the absorbent pad, or the embossed lines located in a direction oblique to the longitudinal direction. 10. An absorbent pad according to claim 9, wherein the upper absorber (30) includes several embossed lines (31), in which the absorber is recessed in the thickness direction. 11. An absorbent pad according to claim 10, wherein several embossed lines (31) in the upper absorber (30) include embossed lines connected to the slot (36). 12. Absorbent pad, including liquid permeable top sheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which the two absorbent members are a first absorbent member (30) located on the topsheet (10) side and a second absorbent member (40) located on the backsheet (20) side, the upper absorber (30) includes one or more slits (36) extending in the direction of the thickness of the absorber, the lower absorber (40) includes several embossed lines (41) in which the absorber is recessed in the thickness direction and several unpressed portions (42) surrounded by embossed lines (41), the slot (36) in the upper absorber (30) overlaps at least some of the unpressed portions (42) in the lower absorber (40). 13. Absorbent pad, including liquid permeable top sheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which the two absorbent members are an upper absorbent member (30) located on the top sheet (10) side and a lower absorbent member (40) located on the backsheet (20) side, the upper absorber (30) includes one or more slits (36) extending in the direction of the thickness of the absorber, the lower absorber (40) includes several embossed lines (41) in which the absorber is recessed in the thickness direction and several unpressed portions (42) surrounded by embossed lines (41), the lower absorber (40) includes intersection points (43) at which the embossed lines (41) intersect each other, and the slot (36) in the upper absorber (30) overlaps the intersection points (43) in the lower absorber (40). 14. Absorbent pad, including: liquid permeable top sheet (10); a backsheet (20) and at least two absorbent elements (30, 40), stacked in layers and placed between the topsheet (10) and the backsheet (20), in which the two absorbent members are an upper absorbent member (30) located on the top sheet (10) side and a lower absorbent member (40) located on the backsheet (20) side, the upper absorber (30) includes one or more slits (36) extending in the direction of the thickness of the absorber, the lower absorber (40) includes several embossed lines (41) in which the absorber is recessed in the thickness direction and several unpressed portions (42) surrounded by embossed lines (41), the absorbent pad additionally includes: one or more absorbent members (70) between the backsheet (20) and the lower absorbent member (40), and at least one of several additional absorbent elements (70) includes several embossed lines (71) in which the absorbent element is recessed in the thickness direction.

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