JP5767664B2 - Absorbent article - Google Patents

Description

  The present invention relates to a novel absorbent article.

Absorbent articles such as paper diapers absorb urine discharged from the wearer by an absorbent using an absorbent component such as wood pulp, super absorbent polymer (hereinafter also referred to as “SAP”), and It is an article that accepts stool (stool).
Conventional absorbent articles are provided with pleated members called inner gathers or outer gathers, which can be expanded and contracted by inserting rubber, on the left and right sides of the part that absorbs urine and receives feces. The structure prevents leakage of urine and feces to the outside.

  However, in such an absorbent article, it has a uniform plane across the front and rear, the center part expands when worn, and it comes into a state of wrapping in contact with the entire lower body of the wearer, so urine is discharged The whole lower body gets wet, and when the stool is discharged, there is a problem that the whole lower body is easily soiled from the wearer's buttocks.

In order to solve the above problem, the present inventor has a bottom surface portion and a pair of side portions that rise upward from the left and right sides of the bottom surface portion and are bent so that the edges are inward. The sheet-shaped first leak preventer that forms an internal space with the pair of side portions, and an absorbent body that is disposed in the internal space and contains a superabsorbent resin and can absorb bodily fluids And a pair of edge shape holding members provided along each of the edge portions of the pair of side portions, and a bridging member provided between the center portions of the pair of edge shape holding members. An absorbent article having a three-dimensional structure is proposed (see Patent Document 1).
This absorbent article has the advantage that the body surface of the lower body is less wetted by urine, and the buttocks are not easily soiled by fecal discharge. In addition, there is an advantage that leakage of urine and feces to the outside can be effectively prevented.

JP 2006-116157 A

However, as a result of further examination of the absorbent article by the present inventor, urine or feces move to the upper or upper end of the pair of side portions such that urine moves along the body surface of the wearer. In such a case, it has been found that the surface of the body may become wet or dirty, and leakage of urine or feces may occur.
Therefore, the present invention suppresses the occurrence of wetting and dirt on the body surface even when urine or stool moves to the upper or upper end of the absorbent article, and prevents leakage of urine or stool to the outside. It is an object to provide an absorbent article that can be prevented.

  As a result of intensive studies to achieve the above object, the present inventor has completed an absorbent article having a novel structure.

That is, the present invention provides the following (1) to (8) .

(1) a bottom surface portion and a pair of side portions that rise upward from the left and right sides of the bottom surface portion and project inward to form a gap for passage of urine , the bottom surface portion and the pair of sides A sheet-like leak preventer that forms an internal space with the part;
An absorbent body containing at least one layer in the internal space and containing a superabsorbent resin and capable of absorbing bodily fluids;
A front leak preventer for closing the front opening of the leak preventer by coupling to the bottom part of the leak preventer and a portion extending from the front end of the pair of side parts to the front side of the upper part; and / or A rear leak preventer that is coupled to the bottom portion of the leak preventer and a portion from the rear end of the pair of side portions to the upper rear side and closes the rear opening of the leak preventer. ,
The front leak preventer and / or the liquid moving structure moves you allow fluid to the interior space from the upper side of the rear leak preventer is provided, a second aspect of the absorbent article (the present invention Absorbent articles).
(2) The absorbent article according to (1), wherein a liquid permeable portion is provided in the front leak preventer and / or the rear leak preventer as the liquid mobile structure.
(3) The absorbent article according to (2), wherein the absorber is present under the liquid-permeable portion.
(4) The absorbent article according to (2) or (3), wherein the liquid permeable portion is an opening.

(5) It has a bottom part and a pair of side parts rising upward from the left and right sides of the bottom part and projecting inward, and the bottom part and the pair of side parts form an internal space. A sheet-like leak preventer,
An absorbent body containing at least one layer in the internal space and containing a superabsorbent resin and capable of absorbing bodily fluids;
A liquid guide unit disposed in a position where the discharged urine flow directly hits in the front body part of the internal space, and moves from the position where the urine flow hits to another position when the urine is discharged; And
An absorbent article (absorbent article according to the third aspect of the present invention) provided with a liquid mobility structure that enables movement of body fluid from the upper side of the liquid guide unit to another position of the internal space.
(6) The absorbent article according to (5) , wherein the liquid guide unit is provided with a liquid permeable portion as the liquid mobility structure.
(7) The absorbent article according to (6) , wherein the absorbent is present under the liquid permeable portion.
(8) The absorbent article according to (6) or (7) , wherein the liquid permeable portion is an opening.

  The absorbent article of the present invention suppresses the occurrence of wetting and dirt on the body surface even when urine or stool moves to the upper side of the absorbent article, and prevents leakage of urine or stool to the outside. can do.

It is a schematic diagram which shows the example of the absorber article | item of the 1st aspect of this invention. It is a typical top view showing an example of various liquid permeability parts. It is a schematic diagram which shows another example of the absorber article | item of the 1st aspect of this invention. It is a schematic diagram which shows another example of the absorber article | item of the 1st aspect of this invention. It is a schematic diagram which shows another example of the absorber article | item of the 1st aspect of this invention. It is a schematic diagram which shows another example of the absorber article | item of the 1st aspect of this invention. It is a schematic diagram which shows the example of the absorber article | item of the 3rd aspect of this invention. It is a schematic diagram which shows the example of the absorber article | item of the 3rd aspect of this invention.

  Hereinafter, an absorbent article according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. In the present specification, when the absorbent article of the present invention is actually worn, the side closer to the wearer's skin is referred to as “upper” and the far side is referred to as “lower”. Further, when the absorbent article of the present invention is actually worn, the side corresponding to the front side of the wearer's body is referred to as “front”, and the side corresponding to the rear side is referred to as “rear”. Moreover, in order to make an understanding easy in each figure, the member which is actually contacting may be shown spaced apart.

First, the absorbent article according to the first aspect of the present invention and the absorbent article according to the second aspect of the present invention will be described.
The absorbent article according to the first aspect of the present invention includes a bottom surface portion and a pair of side portions that rise upward from the left and right sides of the bottom surface portion and project inward, and the bottom surface portion and the pair of side portions. A sheet-like leak preventer that forms an internal space, and at least one layer disposed in the internal space, the absorbent body containing a highly water-absorbent resin and capable of absorbing bodily fluids, This is an absorbent article provided with a liquid mobility structure that allows movement of body fluid from the upper side of the upper edge, which is a portion projecting to the inside of the part, into the internal space.
The absorbent article according to the second aspect of the present invention has a bottom surface portion and a pair of side portions rising upward from the left and right sides of the bottom surface portion and projecting inward, and the bottom surface portion and the pair of side portions. A sheet-like leak preventer that forms an internal space, an absorbent body that includes at least one layer disposed in the internal space, and that can absorb body fluid, and the leak preventer The front leak preventer for closing the front opening of the leak preventer and / or the front leak preventer, which is coupled to the bottom portion and the portion from the front end of the pair of side portions to the upper front side, and / or the leak preventer A rear leak preventer that is coupled to a bottom portion and a portion from the rear end of the pair of side portions to the upper rear portion, and closes the rear opening of the leak preventer; Liquid mobility structure that enables movement of body fluid from above the body and / or the rear leak preventer to the internal space It provided a absorbent article.

FIG. 1 is a schematic diagram illustrating an example of an absorbent article according to the present invention. The absorbent article 100 shown in FIG. 1 constitutes a waistband diaper. 1A is a plan view, and FIG. 1B is a lateral end view taken along line IB-IB in FIG. 1A.
In each plan view in the attached drawings, the front side of the absorbent article or the like is positioned on the upper side of the drawing.

  The absorbent article 100 of the present invention shown in FIG. 1 basically has a bottom surface portion 12 and a pair of side portions 14 rising upward from the left and right sides of the bottom surface portion 12 and projecting inward. 12 and a pair of side portions 14 form an internal space S, and a sheet-shaped leak preventer 10 and an absorbent body 20 that is disposed in the internal space S and that contains a highly water-absorbent resin and can absorb bodily fluids. It comprises.

As the material of the leak preventer 10, a material generally used as a back sheet can be used. Specifically, for example, a resin film such as PE, PP, PET, and EVA; and a body fluid impermeable sheet such as a foamed sheet of the resin can be used. As the body fluid impermeable sheet, a material having air permeability such as an air permeable film is also preferably used.
Moreover, when using the film of the said resin, in order to improve a touch and an external appearance, it can also be used as a multilayer sheet | seat of a film and a nonwoven fabric. In this case, as the nonwoven fabric, SB, SMS, thermal bond nonwoven fabric and the like having a relatively low basis weight are preferably used.
Also, a multilayer sheet of the resin film and a sheet-like absorber described later can be used.
A highly water-resistant nonwoven fabric can also be used. In this case, you may use independently and can also be used as a multilayer sheet | seat of a film and a highly water-resistant nonwoven fabric.

  The leak preventer 10 may be composed of a plurality of members.

The leak preventer 10 has the bottom surface portion 12 and the pair of side portions 14 as described above.
In FIG. 1, the bottom surface portion 12 has a flat portion where the absorber 20 exists, both sides of the bottom surface portion rise gently, and an end portion of the bottom surface portion 12 together with an end portion of the side portion 14 is a stretchable leg. Form a gather. A leg gather is not specifically limited, For example, it can be set as a conventionally well-known structure.
In FIG. 1, the pair of side portions 14 exist along the bottom surface portion 12 from the left and right end portions of the bottom surface portion 12, rise upward at a portion where the absorber 20 of the bottom surface portion 12 exists, and project inward. However, this is merely a schematic representation, and the structure of the pair of side portions 14 is not particularly limited as long as it has a portion that rises upward from the left and right sides of the bottom surface portion 12 and protrudes inward. . For example, in FIG. 1, the entire pair of side portions 14 protrudes inward from the left and right ends of the bottom surface portion 12, but the pair of side portions extends outward from the left and right sides of the bottom surface portion, and bends inward in the middle. It may be one that protrudes inward.
In the absorbent article 100, the end portions of the pair of upper edge portions 16, which are portions protruding to the inside of the side portion 14, are made of a stretchable material. Although an elastic material is not specifically limited, For example, a polyurethane filament is mentioned.

In the absorbent article 100, a pair of upper edge portions 16 that are portions projecting to the inside of the side portion 14 intersect at the front body of the absorbent article 100, and are approximately isosceles triangles having the intersected point as a vertex. A gap 40 is formed (see FIG. 1A).
When the gap 40 has such a shape, it is possible to prevent a urine from coming into direct contact with the wearer's skin while forming a pocket that can sufficiently accommodate urine in the front body that accommodates urine. In the vicinity, it is possible to maintain an interval (for example, 40 to 50 mm) that does not hinder the discharge of urine, and in the back body, the interval increases as it goes backward to wrap the wearer's buttocks and easily accommodate the stool can do.

  An inner space S is formed by the bottom surface portion 12 and the pair of side portions 14. In the internal space S, the absorber 20 is arranged.

The absorbent body 20 used in the present invention is not particularly limited as long as it contains a highly water-absorbent resin and can absorb body fluids. For example, powdered absorbent bodies such as powdered wood pulp and unprocessed SAP However, a sheet-like absorbent body is preferable in consideration of form stability, possibility of dropping off, and the like. Especially, the sheet-like absorber formed by coating the said highly water-absorbent resin on a nonwoven fabric is preferable.
The kind of absorber can be suitably selected according to a use. For example, when the absorbent article of the present invention is used as a diaper for children, as a product for newborns or infants with a low age (in terms of size, S size), a material having a high content of wood pulp is preferable. For infants with a high age (in terms of size, M size or L size), those having a high SAP content are preferred.

Among the sheet-like absorbent bodies, one preferred embodiment is a superabsorbent sheet containing SAP of 50% by mass or more, preferably 60 to 95% by mass.
The highly water-absorbent sheet is an ultrathin sheet-like absorbent body mainly composed of SAP. The superabsorbent sheet has a very small thickness because the SAP content is extremely high. The thickness of the superabsorbent sheet is preferably 1.5 mm or less, and more preferably 1 mm or less.
As long as the superabsorbent sheet is an ultra-thin sheet-like absorbent body mainly composed of SAP, the configuration and the production method are not particularly limited.
For example, a super absorbent sheet obtained by the Air Laid method can be mentioned. The Air Laid method is a method in which pulverized wood pulp and SAP are mixed, a binder is added, and the resultant is formed into a sheet shape to obtain a highly water-absorbent sheet. As a highly water-absorbent sheet obtained by this method, for example, NOVATHIN (registered trademark) manufactured by Rayonier in the United States and B-SAP manufactured by Oji Kinocross are known.
Moreover, the superabsorbent sheet obtained by the method of coating SAP dispersion | distribution slurry on body fluid permeable sheets, such as a nonwoven fabric, is also mentioned. Here, it is preferable that the SAP dispersion slurry is obtained by dispersing SAP and microfibrillated cellulose (MFC) in a mixed solvent of water and ethanol. As a highly water-absorbent sheet obtained by this method, MegaThin (registered trademark) manufactured by Japan Absorbent Technology Laboratory is known, for example.
In addition, for example, a superabsorbent sheet obtained by a method in which a large amount of SAP is supported on a raised nonwoven fabric and fixed with a hot melt binder, emulsion binder, aqueous fiber, etc., and fibrous SAP is mixed with PET (polyethylene terephthalate) fiber And a SAP sheet obtained by sandwiching the upper and lower sides of the SAP layer with a tissue or a liquid-permeable non-woven fabric.

At least one layer of the absorber is arranged. That is, the absorber may be a single layer or two or more layers (multiple layers).
The absorber can also be arranged in a folded state.

The absorbent article 100 is provided with a liquid mobility structure that enables movement of body fluid from the upper side of the upper edge portion 16, which is a portion protruding to the inside of the side portion 14, to the internal space S.
The liquid mobility structure in the absorbent article 100 shown in FIG. 1 is a liquid permeable portion provided on the upper edge portion 16 of the side portion 14, and more specifically, on the upper edge portion 16 of the side portion 14. A rectangular opening 30 is provided.
The absorbent article 100 is worn so that the urethral opening m is positioned above the gap 40 that extends between the edges of the pair of side portions 14 and extends in the front-rear direction. When urine is discharged, as indicated by arrows in FIG. 1, most of the urine moves through the gap 40 to the internal space S and is absorbed by the absorber 20. On the other hand, a part of the discharged urine moves to the upper side of the upper edge portion 16 of the side portion 14. In this case, as shown by the arrow in FIG. 1, all or most of the amount moves from the upper edge 16 to the internal space S by passing through the opening 30 and is absorbed by the absorber 20. The Therefore, wetting of the body surface due to the presence of urine above the upper edge 16 can be suppressed, and leakage of urine to the outside can be prevented.
As shown in FIG. 1, when the liquid permeable portion is a rectangular opening provided at the upper edge portion of the side portion, even if there is much urine that does not pass through the gap 40 and overflows on the upper edge portion 16. Since it can be made to pass through the opening 30 and be absorbed by the absorber 20, there is no possibility of leaking to the outside.

The liquid-permeable part provided in the upper edge part of the side part is not limited to a rectangular opening as shown in FIG.
FIG. 2 is a schematic plan view showing examples of various liquid permeable portions.
Each of the liquid permeable portions shown in FIGS. 2A to 2C is a liquid permeable portion including a plurality of openings. The liquid permeable portion shown in FIG. 2A is composed of a plurality of fine circular openings. By optimizing the diameter and number of the circular openings, the liquid permeation performance can be appropriately adjusted.
The liquid permeable portion shown in FIG. 2B is composed of a plurality of rectangular cutout openings. By optimizing the area and number of the notch-shaped openings, the liquid permeation performance can be appropriately adjusted.
The liquid permeable portion shown in FIG. 2C includes a plurality of slit-like openings extending in the front-rear direction and arranged in parallel. By arranging slit-shaped openings in parallel, even if the first row (the innermost one) is not able to transmit urine sufficiently, the urine can be surely transmitted through the second and third rows, Leakage to the outside can be prevented.
The liquid permeable portion shown in FIG. 2 (D) is a liquid permeable portion made of a porous material. A liquid permeable portion made of a porous material is provided on a part of the upper edge portion of the side portion, and body fluid can be moved through fine voids in the porous material. By appropriately selecting the porous material, it is possible to prevent the bodily fluid moved from the liquid permeable portion from returning. Examples of the porous material include hydrophilic non-woven fabrics such as hydrophilized spunmelt non-woven fabrics, rayon and cotton; apertured films and nets (for example, nets and meshes).
These liquid-permeable portions can be used in combination of a plurality of types. For example, a combination of a notch-shaped opening and another shape of a notch-shaped opening, or a combination of a notch-shaped opening and a slit-shaped opening may be mentioned. Further, a combination in which a plurality of types of liquid permeable portions are arranged above and below, such as a combination in which a notch-like opening is covered with a liquid permeable porous material, is also preferable.

In the case where the liquid-movable structure is a liquid-permeable portion provided on the upper edge portion of the side portion, it is preferable that an absorber exists under the liquid-permeable portion. Thereby, the bodily fluid which moved to internal space through the liquid permeable part can be rapidly absorbed by the absorber.
In the absorbent article 100 shown in FIG. 1, the absorbent body 20 exists under the opening 30.

Absorbent article 100 constitutes a waistband diaper.
A waistband 50 is disposed near the rear end of the absorbent article 100. The waistband 50 has a structure in which a plurality of (for example, 15) polyurethane filaments (for example, 470 dtex manufactured by Toray DuPont) are sandwiched between ^two SMS (for example, manufactured by Avgor, basis weight 13 g / m ² ). doing.
A hook material 52 is provided at both left and right ends of the waistband 50, and is detachable from a loop material (not shown) provided on the lower side of the front portion of the leak preventer 10. When the absorbent article 100 is worn, a hook material 52 and a loop material (not shown) are combined to form a waist hole.

  FIG.3 and FIG.4 is a schematic diagram which shows another example of the absorber article | item of this invention. The absorbent article 100a shown in FIGS. 3 and 4 constitutes a pants-type diaper. FIG. 3 is a plan development view in which the left and right portions of the seal portion of the waist portion are cut and developed, and FIG. 4 (A) is a lateral end view taken along the line IVA-IVA in FIG. FIG. 4B is a lateral end view taken along line IVB-IVB in FIG. 3, and FIG. 4C is a longitudinal end view taken along line IVC-IVC in FIG.

The absorbent article 100a of the present invention shown in FIG. 3 and FIG. 4 basically has a bottom surface portion 12a and a pair of side portions 14a that rises upward from the left and right sides of the bottom surface portion 12a and protrudes inward. The bottom portion 12a and the pair of side portions 14a form the internal space S. The sheet-like leak preventer 10a and the superabsorbent resin disposed in the internal space S can be used to absorb bodily fluids. And an absorber 20a.
Therefore, the absorbent article 100a is the absorbent article according to the first aspect of the present invention, but also corresponds to the absorbent article according to the second aspect of the present invention as described later.

As described above, leak preventer 10a has bottom surface portion 12a and a pair of side portions 14a.
The bottom surface portion 12a is folded to have an inverted Ω-shaped lateral end surface, and the end portions on both sides thereof are coupled to the end portions of the side portion 14a. By folding the bottom surface portion 12a, it is possible to secure a volume to be retained even when a large amount of urine is discharged.
The pair of side portions 14a rises upward and protrudes inward from the left and right end portions of the bottom surface portion 12a.
The upper edge portion 16a, which is a portion protruding to the inside of the side portion 14a, has an end portion bent outward to form an edge shape holding member 18. The edge shape holding member 18 is disposed so as to come into contact with the wearer's skin. The edge shape holding member 18 is formed wide by winding a plurality of (for example, five) polyurethane filaments (for example, 470 dtex manufactured by Toray DuPont) by bending the end of the upper edge 16a outward and further folding back. Has been.
As the material of the leak preventer 10a, the same material as that of the leak preventer 10 can be used.
An inner space S is formed by the bottom surface portion 12a and the pair of side portions 14a. In the internal space S, the absorber 20a is disposed.

  The absorbent body 20a is basically the same as the absorbent body 20 of the absorbent article 100, but, like the bottom surface portion 12a of the leak preventer 10a, is folded and has an inverted Ω-shaped lateral end surface. It is different. Since the absorber 20a is folded, the amount of the absorber disposed in the internal space S can be increased, and even when a large amount of urine is discharged, it can be absorbed.

  A guide sheet 22 is disposed in the upper part of the central portion in the left-right direction of the absorber 20a.

The guide sheet 22 has a flow path for moving urine.
When using the absorbent article, the amount of urine absorbed by the absorbent body may be greatly biased depending on the position depending on the posture of the wearer, the wearing position, and the like. In such a case, when the absorbent article of the present invention has a guide sheet, the urine moves from the absorber that has absorbed a large amount of urine to a small portion, and as a result, the bias is alleviated. Thereby, the substantial urine absorption amount and usable time of an absorbent article become long.

  The guide sheet 22 is not particularly limited as long as it has a flow path capable of moving urine, but it is preferable that the guide sheet 22 does not have body fluid absorbability or body fluid retention because the urine can be moved quickly. Specifically, the uneven | corrugated sheet | seat member (open hole uneven | corrugated sheet member) which has an opening in a convex part is mentioned suitably.

The perforated concave-convex sheet member has a concave-convex surface having a concave portion and a convex portion as at least one surface. In the perforated concave-convex sheet member, a large number of concave portions are connected to function as a body fluid flow path. The perforated uneven sheet member has an advantage that the flow of body fluid is not hindered even if the convex part is slightly collapsed during use.
Further, in the apertured uneven sheet member, the aperture also functions as a body fluid flow path.

Examples of the material of the apertured uneven sheet member include a body fluid impermeable film made of a resin such as PE, PP, PVA, and urethane.
Specific examples of the apertured concavo-convex sheet member include those proposed by the present inventor in WO 02/065965.

  When an apertured uneven sheet member is used as the guide sheet, a body fluid remains in the aperture, a liquid residue is generated, and so-called rewetting value may be deteriorated. In this case, it is preferable to use a hydrophilic diffusion sheet in combination on the lower side of the apertured uneven member. Thereby, since the bodily fluid which exists in an opening | penetration osmose | permeates a hydrophilic diffusion sheet and moves, a rewet value becomes low significantly. Moreover, it is prevented that the apertured uneven sheet member is displaced from the leak preventer, and the shape stability is also improved.

As the hydrophilic diffusion sheet, a hydrophilic nonwoven fabric having a relatively low basis weight is preferably used. Examples of the hydrophilic nonwoven fabric include a hydrophilic nonwoven fabric containing rayon, cotton, wood pulp and the like; or tissue. Specific examples include tissue paper, rayon spunbond (for example, TCF, manufactured by Futura Chemical), cotton spunlace, rayon / PP mixed spunlace, and rayon / PET mixed spunlace.
Further, non-woven fabrics made hydrophilic by surface treatment of synthetic nonwoven fabrics such as spunbond nonwoven fabrics of PP, PE or PET, thermal bond nonwoven fabrics of PP, and through-air nonwoven fabrics of PE / PET with a surfactant or the like.
The apertured concavo-convex sheet member and the hydrophilic diffusion sheet may be simply overlapped and laminated, or may be combined by hot melt, thermal lamination, or the like.

It is preferable to use a bodily fluid impermeable sheet in combination under the hydrophilic diffusion sheet. Thereby, the body fluid is not temporarily stored between the hydrophilic diffusion sheet and the sheet portion of the leak preventer, and quickly moves to the bag portion of the leak preventer. Examples of the material for the body fluid impermeable sheet include films made of resins such as PE, PP, PVA, and urethane.
The hydrophilic diffusion sheet and the body fluid impermeable sheet may be simply stacked and laminated, or may be combined by hot melt, thermal lamination or the like.
Moreover, you may use combining a hole uneven | corrugated sheet | seat member and a bodily fluid impermeable sheet | seat, without using a hydrophilic diffusion sheet.
The perforated uneven sheet member and the body fluid impermeable sheet may be simply overlapped and laminated, or may be combined by hot melt, thermal lamination or the like.

In the absorbent article 100a, from the upper side of the upper edge portion 16a that is a portion protruding to the inside of the side portion 14a, more specifically, from the upper side of the edge shape holding member 18 at the end portion of the upper edge portion 16a. In addition, a fluid mobility structure that enables the movement of body fluid into the internal space S is provided.
The liquid mobility structure in the absorbent article 100a shown in FIG. 3 and FIG. 4 includes the edge shape holding member 18 at the end of the upper edge 16a of the side part 14a and the urine / feces described below existing inside the edge shape holding member 18 This is the gap 30 a between the separation member support band 62.
The function of the gap 30a is the same as the function of the opening 30 of the absorbent article 100. Specifically, wetting of the body surface due to the presence of urine above the upper edge portion 16a (more specifically, the edge shape holding member 18 at the end of the upper edge portion 16a) is suppressed, and This is a function to prevent leakage of urine to the outside. This function is that when urine moves from the urethral orifice to the internal space S, a part of the urine overflows and passes over the urine / feces separation member support band 62, either directly or at the end of the upper edge portion 16a. This is realized by passing through the upper side of the edge shape holding member 18 and passing through the gap 30a existing in the center in the front-rear direction and being absorbed by the absorber 20a. If the urine / feces separation member support band 62 and the gap 30a are not provided, a part of urine may get over the edge shape holding member 18 at the end of the upper edge portion 16 and leak to the outside. sell. The gap 30 a is provided adjacent to both the left and right sides of the urine / feces separation member 60. This is to prevent a problem that urine transmitted through the upper surface of the urine / feces separation member 60 leaks to the outside.

The absorbent article 100a further includes a urine / feces separation member 60 having a urine / feces separation function that partitions the internal space S forward and backward.
In the absorbent article 100a, the urine / feces separation member 60 is coupled to the pair of side portions 14a and the tip of the stool receiving sheet 70, so that the internal space S extends from the front side to the lower side of the stool receiving sheet 70. The stool is separated into a stool receiving space and an upper stool receiving space of the rear stool receiving sheet 70, and an absorbent body 20a is disposed in the urine absorbing space. That is, the absorbent article 100a has a stool receiving sheet 70 on the leak preventer 10a via the absorber 20a at the rear thereof, and absorbs urine with the absorber 20a on the leak preventer 10a, thereby receiving feces. It has a “two-story structure” in which flights are accommodated on the upper side of the seat 70.

The urine / feces separation member is not particularly limited as long as it can partition the internal space forward and backward and physically prevent movement of urine and feces. Examples thereof include an adhesive, rubber, film, foam (foam), nonwoven fabric, and net-like sheet.
By separating the internal space S into the urine absorption space and the stool storage space by the urine / feces separation member, the urine / feces separation process can be performed. As a result, it is possible to eliminate problems such as mixing of urine and feces, increasing the odor and facilitating rash. Separation between the urine absorption space and the stool storage space is preferably complete, but even if both are connected, if the part is slight, or if an absorber that does not easily diffuse urine is used, Substantial urine / feces separation processing is possible.

The absorbent article 100a further includes a urine / feces separation member support band 62 that sandwiches and supports the upper end portion of the urine / feces separation member 60 from the left and right sides.
The urine / feces separation member support band 62 is a gathered band provided along the upper edge portion 16a which is a portion projecting inside the pair of side portions 14a, and the lower end portion thereof is coupled to the upper edge portion 16a. ing. The urine / feces separation member support band 62 is coupled to the urine / feces separation member 60 and supports the urine / feces separation member 60 at the center in the front-rear direction.
The positional relationship between the upper edge portion 16a and the urine / feces separation member 60 has a gap 30a in the central portion in the front-rear direction, and is substantially in contact with other portions.
In the absorbent article 100a, a pair of urine / feces separation member support bands 62 form a substantially rectangular gap.

The absorbent article 100a further includes a stool receiving sheet 70 having a distal end portion coupled to the lower end portion of the urine / feces separation member 60.
The stool receiving sheet 70 is made of, for example, a hydrophobic SMS non-woven fabric (for example, a basis weight of 15 g / m ² ). Partially joined to leave. When loose stool such as watery stool is discharged because the unbound portion remains, the loose stool passes from the left and right sides of the stool receiving sheet 70 to the lower side via the unbound portion. It moves to the existing absorber 20a and is absorbed.

In the present invention, the front leak preventer is further coupled to the bottom portion of the leak preventer and a portion from the front end of the pair of side portions to the front side of the upper portion to close the front opening of the leak preventer. A body and / or a rear part that is coupled to the bottom part of the leak preventer and a part from the rear end of the pair of side parts to the rear side of the upper part to close the rear opening of the leak preventer A preferred embodiment is provided with a liquid-moving structure that includes a leak-proof body and enables movement of body fluid from above the front leak-proof body and / or the rear leak-proof body to the internal space. One.
The absorbent article 100a is further coupled to the bottom surface portion 12a of the leak preventer 10a and a portion from the front end of the pair of side portions 14a to the upper front side to close the front opening of the leak preventer 10a. Leaker 80, and rear part that is coupled to bottom surface part 12a of leak preventer 10a and the part from the rear end of the pair of side parts 14a to the rear side of upper part to close the rear opening of leak preventer 10a A liquid-moving structure is provided that includes a leak-proof body 82 and enables movement of body fluid from the upper side of the front leak-proof body 80 and the rear leak-proof body 82 to the internal space.
Therefore, the absorbent article 100a also corresponds to the absorbent article according to the second aspect of the present invention.

  As shown in FIGS. 3 and 4C, the front leak preventer 80 is coupled to the bottom surface portion 12a of the leak preventer 10a and the portion from the front end of the pair of side portions 14a to the front side of the upper portion, The opening on the front side of the leak preventer 10a is closed. In addition, the rear leak preventer 82 is coupled to the bottom surface portion 12a of the leak preventer 10a and a portion from the rear end of the pair of side portions 14a to the upper rear side, thereby opening the rear opening of the leak preventer 10a. It is closed.

Since the absorbent article 100 of the present invention is worn in a U-shaped state in which the front side and the rear side are up and the center part is down in the standing position and the sitting position, urine and feces leak from the front and rear openings. There is almost no leakage, but there is a risk of leakage in the prone and prone positions.
In the absorbent article 100a of the present invention, the front leak preventer 80 and the rear leak preventer 82 are combined with the leak preventer 10a to form a bag. Thereby, the front leak preventer 80 prevents the discharged urine from leaking outside through the opening on the front side of the leak preventer 10a. Further, the rear leak preventer 82 prevents the discharged urine and feces from leaking to the outside from the opening behind the leak preventer 10a.

The absorbent article 100a is provided with a liquid mobility structure that enables movement of body fluid from the upper side of the front leak preventer 80 and the rear leak preventer 82 to the internal space S, respectively.
These liquid mobility structures are liquid permeable portions provided in the front leak preventer 80 and the rear leak preventer 82, respectively, and more specifically, the front leak preventer 80 and the rear leak preventer 82. The rectangular openings 32 and 34 are provided respectively.
When a part of the discharged urine moves to the upper side of the front leak preventer 80 and the rear leak preventer 82, all or most of the urine passes through the openings 32 and 34, thereby causing the front leak preventer 80 and It moves from the upper side of the rear leak preventer 82 to the internal space S and is absorbed by the absorber 20a. Therefore, wetting of the body surface due to the presence of urine above the front leak preventer 80 and the rear leak preventer 82 can be suppressed, and leakage of urine to the outside can be prevented.
As shown in FIG. 3, when the liquid permeable portion is a horizontally long rectangular opening provided in the front leak preventer and the rear leak preventer, the front leak preventer and the rear protector are transmitted along the skin of the wearer. Urine that has moved onto the leaking body can be reliably moved to the internal space over a wide range in the width direction.

When the absorbent article of the present invention includes a urine / feces separation member like the absorbent article 100a, the urine / feces separation member is present in the vicinity of the wearer's urethral opening, so It is easy to move to the upper side of the upper edge of the part. Further, when the front leak preventer and / or the rear leak preventer is further provided, there is a possibility of moving to the upper part of the front leak preventer and / or the rear leak preventer.
Therefore, when the absorbent article according to the present invention includes the urine / feces separation member, the urine is present on the upper surface of the upper edge, and further on the front leakage preventer and / or the rear leak preventer. The necessity of suppressing wetting and preventing leakage of urine to the outside is great, and the effect of the liquid mobility structure is also great.

Absorbent article 100a constitutes a pants-type diaper (tapeless diaper).
Waistbands 50a are disposed in the vicinity of the front end portion and the rear end portion of the absorbent article 100a, respectively. The waistband 50 a can be the same as the waistband 50 of the absorbent article 100. In the absorbent article 100a, the front body and the back body are joined at the left and right ends of the front and rear waist bands 50a shown in FIG. 3 to form a waist hole.

  FIG.5 and FIG.6 is a schematic diagram which shows another example of the absorber article | item of this invention. The absorbent article 100b shown in FIGS. 5 and 6 constitutes a waistband diaper. 5 is a plan view, FIG. 6 (A) is a lateral end view taken along line VIA-VIA in FIG. 5, and FIG. 6 (B) is a lateral end face taken along line VIB-VIB in FIG. FIG. 6C is a vertical end view taken along the line VIC-VIC in FIG.

The absorbent article 100b of the present invention shown in FIGS. 5 and 6 basically has a bottom surface portion 12b and a pair of side portions 14b that rises upward from the left and right sides of the bottom surface portion 12b and protrudes inward. The bottom portion 12b and the pair of side portions 14b form the internal space S. The sheet-like leak preventer 10b and the superabsorbent resin disposed in the internal space S can be used to absorb bodily fluids. And an absorber 20b.
Therefore, the absorbent article 100b is the absorbent article according to the first aspect of the present invention, but also corresponds to the absorbent article according to the second aspect of the present invention, as will be described later.

As described above, the leak preventer 10b includes the bottom surface portion 12b and the pair of side portions 14b.
The bottom surface portion 12b is folded and has an inverted Ω-shaped lateral end surface, and both end portions thereof are coupled to the end portions of the side portion 14b. Since the bottom surface portion 12b is folded, it is possible to secure a volume to be retained even when a large amount of urine is discharged.
The pair of side portions 14b rises upward and protrudes inward from the left and right end portions of the bottom surface portion 12b.
The upper edge portion 16b, which is a portion protruding to the inside of the side portion 14b, has an end portion bent outward to form an edge shape holding member 18a. The edge shape holding member 18a is disposed so as to contact the wearer's skin. The edge shape holding member 18a is basically the same as the edge shape holding member 18 of the absorbent article 100a.
As the material of the leak preventer 10b, the same material as that of the leak preventer 10 can be used.
An inner space S is formed by the bottom surface portion 12b and the pair of side portions 14b. In the internal space S, the absorber 20b is arranged.

  The absorbent body 20b is basically the same as the absorbent body 20a of the absorbent article 100a.

A guide sheet 22a is disposed at the upper part of the central portion in the left-right direction of the absorbent body 20b.
The guide sheet 22a is basically the same as the guide sheet 22 of the absorbent article 100a.

In the absorbent article 100b, from the upper side of the upper edge portion 16b that is a portion protruding to the inside of the side portion 14b, more specifically, from the upper side of the edge shape holding member 18a at the end portion of the upper edge portion 16b. In addition, a fluid mobility structure that enables the movement of body fluid into the internal space S is provided.
The liquid mobility structure in the absorbent article 100b shown in FIGS. 5 and 6 is a liquid permeable portion provided on the upper edge portion 16b of the side portion 14b, and more specifically, the upper edge of the side portion 14b. This is a rectangular opening 30b provided in the portion 16b.
The function of the opening 30b is the same as the function of the opening 30 of the absorbent article 100. Specifically, wetting of the body surface due to the presence of urine above the upper edge portion 16b (more specifically, the edge shape holding member 18a at the end of the upper edge portion 16b) is suppressed, and This is a function to prevent leakage of urine to the outside. This function is achieved by the urine present on the upper side of the edge shape retaining member 18a at the end of the upper edge portion 16b passing through the opening 30b existing outside and in the center portion in the front-rear direction. It implement | achieves by moving to the internal space S from the upper side of the edge part 16b, and being absorbed by the absorber 20b.

The absorbent article 100b further includes a urine / feces separation member 60a having a urine / feces separation function that partitions the internal space S forward and backward.
In the absorbent article 100b, the urine / feces separation member 60a is coupled to the pair of side portions 14b and the tip of the feces receiving sheet 70a, so that the internal space S is absorbed from the front side to the lower side of the feces receiving sheet 70a. Is separated into a stool receiving space and a stool receiving space on the upper side of the rear stool receiving sheet 70a, and an absorbent body 20b is disposed in the urine absorbing space. That is, the absorbent article 100b has a stool receiving sheet 70a on the leak preventer 10b via the absorber 20b in the rear part thereof, and absorbs urine with the absorber 20b on the leak preventer 10b to receive feces. It has a “two-story structure” in which flights are accommodated on the upper side of the seat 70a.

  The urine / feces separation member 60a is basically the same as the urine / feces separation member 60 of the absorbent article 100a, but has a Z-shaped longitudinal section (see FIG. 6C) and a planar shape. Is different in that the length in the front-rear direction is shortened at the center in the left-right direction (see FIG. 5). Thus, when the urine / feces separation member 60a is folded so that the longitudinal section thereof is Z-shaped, when the stool is discharged, the urine / feces separation member 60a extends vertically, thereby reducing the space for accommodating the stool. Can be bigger. Further, when the planar shape of the urine / feces separation member 60a is long in the left / right direction, the length in the front / rear direction of both ends is long and the length in the front / rear direction of the center is short. It becomes possible to make it contact | abut stably to the narrow part of the perineum, and the urine / feces separation effect will become more excellent.

The absorbent article 100b further includes a stool receiving sheet 70a having a leading end coupled to the lower end of the urine / feces separation member 60a.
The stool receiving sheet 70a is basically the same as the stool receiving sheet 70 of the absorbent article 100a.

The absorbent article 100b is further coupled to the bottom surface portion 12b of the leak preventer 10b and a portion extending from the front end of the pair of side portions 14b to the front side of the upper portion to close the front opening of the leak preventer 10b. Leaker 80a and rear part that is coupled to bottom surface part 12b of leak preventer 10b and the part from the rear end of the pair of side parts 14b to the upper rear side to close the rear opening of leak preventer 10b A liquid-moving structure is provided that includes a leak-proof body 82a and enables movement of body fluid from the upper side of the front leak-proof body 80a and the rear leak-proof body 82a to the internal space.
Therefore, the absorbent article 100b also corresponds to the absorbent article according to the second aspect of the present invention.

  The front leak preventer 80a and the rear leak preventer 82a are basically the same as the front leak preventer 80 and the rear leak preventer 82 of the absorbent article 100a, respectively.

The absorbent article 100b is provided with a liquid mobility structure that allows movement of body fluid from the upper side of the front leak preventer 80a and the rear leak preventer 82a to the internal space S, respectively.
These liquid mobility structures are liquid permeable portions provided in the front leak preventer 80a and the rear leak preventer 82a, and more specifically, the front leak preventer 80a and the rear leak preventer 82a. A rectangular opening 32a and two slit-shaped openings 34a are provided. Two slit-shaped openings 34a provided in the rear leak preventer 82a pass through the waistband 50b.
The functions of the openings 32a and 34a are the same as the functions of the openings 32 and 34 of the absorbent article 100a.
As shown in FIG. 5, if the liquid-permeable portion is a slit-like opening in two rows in the front and rear provided in the rear leak preventer, urine cannot be sufficiently permeated in the first row (front side). Even in the second row, urine can be reliably permeated to prevent leakage to the outside. Moreover, since an opening area can be narrowed by making opening into slit shape, it can prevent effectively that urine flows backward from the lower side.

Absorbent article 100b constitutes a waistband diaper.
Near the rear end of the absorbent article 100b, the waistband 50b is disposed on the side that comes into contact with the wearer's skin. The waistband 50b is the same as the waistband 50 of the absorbent article 100.
Hook material 52a is provided at both left and right ends of the waistband 50b, and is detachable from the loop material 54 provided below the front portion of the leak preventer 10b. When the absorbent article 100b is worn, the hook member 52b and the loop member 54 are combined to form a waist hole.

Next, the absorbent article according to the third aspect of the present invention will be described.
The absorbent article according to the third aspect of the present invention has a bottom surface portion and a pair of side portions that rise upward from the left and right sides of the bottom surface portion and project inward, and the bottom surface portion and the pair of side portions. A sheet-like leak preventer that forms an internal space, an absorbent body that is disposed in the internal space and that contains a highly water-absorbent resin and can absorb bodily fluids, and a predecessor of the internal space A liquid guide unit disposed in a position where the flow of discharged urine directly hits in the circadian part and moving from the position where the flow of urine hits to another position when urine is discharged; It is an absorbent article provided with a liquid mobility structure that enables movement of body fluid from the upper side of the unit to another position of the internal space.

  FIG.7 and FIG.8 is a schematic diagram which shows the example of the absorber article | item of the 3rd aspect of this invention. The absorbent article 100c shown in FIGS. 7 and 8 constitutes a pants-type diaper. FIG. 7 is a plan development view in which the left and right portions of the seal portion of the waist portion are cut and developed, and FIG. 8 (A) is a lateral end view taken along line VIIIA-VIIIA in FIG. B) is a lateral end view along the line VIIIB-VIIIB in FIG. 7, and FIG. 8C is a vertical end view along the line VIIIC-VIIIC in FIG.

  The absorbent article 100c of the present invention shown in FIGS. 7 and 8 basically has a bottom surface portion 12c and a pair of side portions 14c that rises upward from both the left and right sides of the bottom surface portion 12c and protrudes inward. The body portion containing the sheet-like leak preventer 10c forming the internal space S by the bottom surface portion 12c and the pair of side portions 14c and the superabsorbent resin disposed in the internal space S at least one layer. In the absorbent body 20c that can be absorbed and the front body part of the internal space S, it is arranged at a position where the flow of discharged urine directly hits, and when the urine is discharged, the position where the flow of urine hits to another position. And a liquid guide unit 90 to be moved.

  The leak preventer 10c is basically the same as the leak preventer 10a of the absorbent article 100a. The bottom surface portion 12c, the side portion 14c, the upper edge portion 16c, and the edge shape holding member 18b correspond to the bottom surface portion 12a, the side portion 14a, the upper edge portion 16a, and the edge shape holding member 18 of the absorbent article 100a, respectively. . However, in the leak preventer 10c, the folded back portion of the upper edge portion 16c is long, and the edge portion of the edge shape holding member 18b is the outermost portion of the leak preventer 10c.

  The absorbent body 20c is a highly water-absorbent sheet obtained by a method in which SAP-dispersed slurry is coated on a nonwoven fabric in parallel strips. As shown in FIGS. 7 and 8, the absorbent body 20c is folded and arranged in the direction in which the strip-shaped SAPs are arranged in the front-rear direction, similarly to the bottom surface portion 12c of the leak preventer 10c. Since the absorber 20c is folded, the amount of the absorber disposed in the internal space S can be increased, and even when a large amount of urine is discharged, it can be absorbed.

  As shown in FIGS. 7 and 8, the liquid guide unit 90 is disposed in the vicinity of the urethral orifice so that the flow of discharged urine directly hits it. In addition, the liquid guide unit 90 extends from the vicinity of the urethral opening to the periphery, so that when urine is discharged, the urine is moved from the position where the flow of urine hits to another position, specifically. Is moved to the vicinity of the center of the leak preventer 10c. Therefore, the absorbent article using the liquid guide unit 90 shown in FIGS. 7 and 8 is excellent in the utilization efficiency of the absorbent body.

  The liquid guide unit 90 has a sheet shape. The material of the sheet-like liquid guide unit is not particularly limited, and can be constituted by, for example, a film, a net, a nonwoven fabric, a woven fabric, a knitted fabric, or a combination thereof.

  At least a part of the liquid guide unit may have stretchability, or may be used in combination with a stretchable material. In these cases, the liquid guide unit exhibits delicate followability according to the change in the posture of the wearer and the movement of the body, and the position of the liquid guide unit is always easily kept constant.

  Further, at least a part of the liquid guide unit may have a cushioning property, or may be used in combination with a cushioning material. In these cases, the thickness of the liquid guide unit itself or the combination of the liquid guide unit and the cushioning material can be easily changed, so that the liquid guide unit can respond to changes in the position of the wearer and body movements. Shows subtle follow-up and makes it easy to keep the position of the liquid guide unit constant.

  As a specific structure when the liquid guide unit is in a sheet form, for example, an opening film, a bulky nonwoven fabric, and a stretchable net are preferably exemplified.

  The liquid guide unit 90 is folded at the front end and the central portion of the leak preventer 10c and joined at the upper surface of the folded portion of the leak preventer 10c, and is spaced from the leak preventer 10c therebetween.

The liquid guide unit 90 is provided with a liquid mobility structure that enables movement of body fluid from the upper side of the liquid guide unit 90 to another position of the internal space S between the front end and the central portion of the leak preventer 10c. It has been.
This liquid mobility structure is a liquid permeable portion provided in the liquid guide unit 90, and more specifically, is a substantially rectangular opening 36 provided in the liquid guide unit 90.
Most of the urine discharged to the upper side of the liquid guide unit 90 moves rearward on the liquid guide unit 90 and moves to the vicinity of the center of the leak preventer 10b. The part may move forward. In this case, all or most of the liquid moves from the upper side of the liquid guide unit 90 to the internal space S by passing through the opening 36 and is absorbed by the absorber 20c. Therefore, wetting of the body surface due to the presence of urine above the liquid guide unit 90 can be suppressed, and leakage of urine to the outside can be prevented.
As shown in FIG. 7, when the liquid permeable portion is a substantially rectangular opening provided in the liquid guide unit, the length of the rectangle and the distance from the front end portion are optimized so that the front of the urine Urine can be guided to the lower absorber.

The absorbent article 100c is further coupled to the bottom surface portion 12c of the leak preventer 10c and a portion extending from the front end of the pair of side portions 14c to the front side of the upper portion to close the front opening of the leak preventer 10c. The leaking body 80b and the rear part that is coupled to the bottom surface part 12c of the leakage preventing body 10c and the portion from the rear end of the pair of side parts 14c to the upper rear side to close the rear opening of the leakage preventing body 10c A leak preventer 82b is provided.
The front leak preventer 80b and the rear leak preventer 82b are basically the same as the front leak preventer 80 and the rear leak preventer 82 of the absorbent article 100a, respectively, except that the openings 32 and 34 are not provided.

  The absorbent article 100c constitutes a pants-type diaper (tapeless diaper), similarly to the absorbent article 100a. The waistband 50c corresponds to the waistband 50a of the absorbent article 100a.

As mentioned above, although the absorber article of the present invention was explained based on each embodiment of illustration, the present invention is not limited to these, for example, the composition of each part is arbitrary which can exhibit the same function Can be replaced with configuration.
Moreover, it can also be set as another embodiment by combining arbitrarily the structure of each part in each embodiment.

For example, as the liquid mobility structure, not only the liquid permeable portion provided on the upper edge of the side of the leak preventer described above, but also the upper side of the upper edge of the leak preventer and the internal space A liquid-moving member provided therebetween is also preferably used.
In the absorbent article of the present invention, when a liquid-movable member is provided as a liquid-movable structure, body fluid can be moved to a relatively distant position.
In one preferred embodiment, the absorber is present in the vicinity of the end of the liquid permeable member on the inner space side. Thereby, the bodily fluid which moved to the internal space through the liquid permeable member can be quickly absorbed by the absorber.
It is preferable that all or a part of the liquid movable member is hydrophilic. Examples of the hydrophilic material used for the liquid transfer member include rayon, cotton nonwoven fabric, and gauze.

  The absorbent article of the present invention is suitably used for any use for adult men, adult women, and children.

10, 10a, 10b, 10c Leak preventive body 12, 12a, 12b, 12c Bottom portion 14, 14a, 14b, 14c Side portion 16, 16a, 16b, 16c Upper edge portion 18, 18a, 18b Edge shape holding member 20, 20a, 20b, 20c Absorber 22, 22a Guide sheet 30, 30b, 32, 32a, 34, 34a, 36 Opening 30a, 40 Gap 50, 50a, 50b, 50c Waistband 52, 52a, 52b Hook material 54 Loop material 60 , 60a Urine / feces separation member 62 Urine / feces separation member support band 70, 70a Feces receiving sheet 80, 80a, 80b Front leak preventer 82, 82a, 82b Rear leak preventer 90 Liquid guide unit 100, 100a, 100b, 100c Absorber Item m Urethral entrance S Internal space

Claims (4)

A bottom surface portion and a pair of side portions that rise upward from the left and right sides of the bottom surface portion and project inward, forming a gap for passage of urine , and the bottom surface portion and the pair of side portions A sheet-like leak preventer that forms an internal space;
An absorbent body containing at least one layer in the internal space and containing a superabsorbent resin and capable of absorbing bodily fluids;
A front leak preventer for closing the front opening of the leak preventer by coupling to the bottom part of the leak preventer and a portion extending from the front end of the pair of side parts to the front side of the upper part; and / or A rear leak preventer that is coupled to the bottom portion of the leak preventer and a portion from the rear end of the pair of side portions to the upper rear side and closes the rear opening of the leak preventer. ,
The front leak preventer and / or possible and to that liquid moving structure to move fluid from an upper side of the rear leak preventer into the internal space is provided, the absorbent article.   The absorbent article according to claim 1, wherein a liquid permeable portion is provided in the front leak preventer and / or the rear leak preventer as the liquid mobile structure.   The absorbent article according to claim 2, wherein the absorbent is present under the liquid permeable portion.   The absorbent article according to claim 2 or 3, wherein the liquid permeable portion is an opening.

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