CN217660457U - Absorbent article - Google Patents

Abstract

Provided is an absorbent article provided with: an absorber extending in the longitudinal direction from the back region (1R) to the front region (1F); a water-permeable sheet disposed on the skin surface side of the absorber; a water-impermeable sheet disposed on the non-skin surface side of the absorber; a hook tape protruding from the end in the width direction of the back body region (1R) and provided with a mechanical fastener on the skin surface side; and a front patch that is directly or indirectly joined to a portion of the non-skin surface side of the non-water-permeable sheet that corresponds to at least a longitudinal end of the absorbent body and that is engageable with the hook tape, wherein the water-permeable sheet is folded along the end of the absorbent body toward the non-skin surface side at the longitudinal end of the absorbent body and reaches the non-water-permeable sheet, and the non-water-permeable sheet is not folded.

Description

Absorbent article

Technical Field

The utility model relates to an absorbent article.

Background

As an example of a diaper which is an absorbent article, a tape-type disposable diaper is known. In a tape type disposable diaper, a tape provided with a hook and loop fastener (hook and loop fastener, japanese patent application laid-open No.: 12501124491241247390) protruding in the width direction from the back body region of a diaper in which an absorbent body having a constant thickness is fitted in the crotch region is joined to a front patch which is a hook and loop fastener joined to the non-skin surface side of the front body region of the diaper, to thereby fix the waist circumference of the wearer (japanese patent laid-open No. 2019-216796.

SUMMERY OF THE UTILITY MODEL

In consideration of the water absorption capacity and leakage prevention of the exudates to be absorbed by the diaper, it is preferable that the absorbent body having a certain thickness extends at least to the waist of the front patch. On the other hand, in order to properly engage the surface fastener with the front patch, it is desirable that the front patch does not have a bent portion.

In order to solve the above problem, the present invention provides a diaper in which a sheet covering the skin surface side of an absorber is bent along the end of the absorber at the end in the longitudinal direction of the absorber, and a sheet covering the non-skin surface side of the absorber is not bent.

Specifically, an aspect of the present invention is an absorbent article including: an absorber extending in a longitudinal direction from a back region to a front region of a wearer and capable of covering a crotch region; a water-permeable sheet disposed on the skin surface side of the absorber; a water-impermeable sheet disposed on the non-skin surface side of the absorber; a hook tape (hereinafter, referred to as hook tape) protruding from an end of the back region in the width direction and provided with a mechanical fastener (hereinafter, referred to as mechanical fastener) on the skin surface side; and a front patch that is directly or indirectly joined to a portion of the non-skin surface side of the non-water permeable sheet that corresponds to at least a longitudinal end of the absorbent body and that can be engaged with the hook tape, wherein the water permeable sheet is bent toward the non-skin surface side along the end of the absorbent body at the longitudinal end of the absorbent body and reaches the non-water permeable sheet, and the non-water permeable sheet is not bent.

In the absorbent body, a non-joined region of a predetermined length in the longitudinal direction from the longitudinal end of the absorbent body, in which the water-permeable sheet and the non-water-permeable sheet are not joined, may be provided, the water-permeable sheet may be joined to the non-water-permeable sheet in front of the non-joined region, and a space formed between the water-permeable sheet and the non-water-permeable sheet in the non-joined region may be used as a buffer space.

The water-permeable sheet and the water-impermeable sheet may further include a cover sheet on the absorbent body side for covering the outer periphery of the absorbent body.

In the non-joined region in the cushioning space, the cover sheet may be joined to the non-skin surface side of the water-permeable sheet and the skin surface side of the water-impermeable sheet.

The end portion of the cushion space on the outer side in the longitudinal direction may be orthogonal to the longitudinal direction of the absorber.

The end portion of the cushion space on the outer side in the longitudinal direction may be inclined with respect to the longitudinal direction of the absorber.

The end portion on the outer side in the longitudinal direction of the cushioning space may be farthest from the end portion of the absorbent body at the widthwise center of the absorbent article.

A bladder member, which is a water-impermeable sheet covering the skin surface side, may be provided near the longitudinal end portion, and the bladder member may be formed by joining the longitudinal end portion side to another sheet and defining the direction of the crotch region as an opening.

The buffer space may be provided at a position corresponding to the opening of the pocket member.

The water-permeable sheet may have a longer longitudinal length than the non-water-permeable sheet.

According to the above technical scheme of the utility model, even set up the absorber to the condition of preceding patch place part, also can not produce the diaper that buckles because of the thickness of absorber in the front patch, consequently can provide the block with the face fastener and can not produce the problem.

Drawings

The features, advantages and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and wherein:

fig. 1 is a perspective view of a diaper of an embodiment.

Fig. 2 is an exploded perspective view of the diaper of the embodiment.

Fig. 3 is a plan view of an embodiment diaper.

Fig. 4 is a sectional view of a front patch portion of the diaper of an embodiment.

Fig. 5 is a cross-sectional view showing an example in which a buffer space is provided at an end of an absorber.

Fig. 6 is a sectional view showing another example of the buffer space.

Fig. 7 is a plan view of a diaper having a cushioning void.

Fig. 8 is a plan view of the case where the cushioning space is not parallel to the diaper width direction.

Fig. 9 is a plan view of the buffer space most expanded at the center in the width direction.

Fig. 10 is an exploded perspective view of a diaper having a pocket portion provided on the skin surface side.

Fig. 11 is a plan view of a diaper provided with a pocket portion on the skin surface side.

Detailed Description

Hereinafter, a diaper according to an embodiment of the present invention will be described with reference to the drawings. The configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

In the present embodiment, a tape-type disposable diaper (which is an example of an "absorbent article" referred to in the present application and will be hereinafter simply referred to as "diaper") is configured such that a direction connecting a front body disposed to face an abdomen of a wearer and a rear body disposed to face a back is defined as a longitudinal direction. The crotch portion arranged in the crotch of the wearer (arranged opposite to the crotch) is positioned between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (the center in the longitudinal direction). In a state where the diaper is worn on a wearer (hereinafter, simply referred to as a "worn state"), a side facing the skin of the wearer (an inner side in the worn state) is referred to as a skin surface side, and an opposite side to the skin surface side (an outer side in the worn state) is referred to as a non-skin surface side. The direction connecting the skin surface side and the non-skin surface side is defined as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, the thickness direction is regarded as a planar view.

Fig. 1 is a perspective view of a diaper of the present embodiment. The diaper 1 includes a crotch region 1B corresponding to a crotch region covering a wearer's pudendum in a worn state, a front body region 1F corresponding to a front body of the wearer and located on a front side of the crotch region 1B, and a rear body region 1R corresponding to a rear body of the wearer and located on a rear side of the crotch region 1B (hereinafter, referred to as a main body in the present application). Tapes 2L and 2R that can be attached to the front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on the left and right edges of the rear body region 1R. When the tapes 2L and 2R are attached to the front patch 2F in a state where the front body region 1F is disposed on the abdominal side of the wearer and the rear body region 1R is disposed on the back side of the wearer, the diaper 1 is fixed to the body of the wearer in a state of surrounding the abdominal circumference and the thighs of the wearer. Since the diaper 1 is fixed to the body of the wearer in this manner, the wearer can walk while standing with the diaper 1 worn.

In the diaper 1, an absorber capable of absorbing and retaining liquid is disposed mainly around the crotch region 1B. In the diaper 1, in order to suppress formation of a gap which becomes an outflow path of liquid between the diaper 1 and the skin of the wearer, the leg gathers 3AL, 3AR are provided at a portion surrounding the leg hole (thigh) of the wearer, the three-dimensional gathers 3BL, 3BR are provided at the inner side in the width direction of the diaper 1 than the leg gathers 3AL, 3AR, and the waist gather 3R is provided at a portion surrounding the abdominal hole of the wearer. The leg gathers 3AL and 3AR, the three-dimensional gathers 3BL and 3BR, and the waist gather 3R are brought into close contact with the skin of the wearer by the elastic force of the elastic member. This prevents the liquid discharged from the pudendal region of the wearer from leaking out of the diaper 1 and being absorbed by the absorbent body of the diaper 1. Further, as the elastic member, linear or belt-like rubber can be appropriately selected.

Fig. 2 is an exploded perspective view of the diaper of the embodiment. As shown in the figures, the diaper 1 is composed of a plurality of sheets, having a complicated configuration. The diaper 1 has a cover sheet 4 which forms the outer surface in the worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance and provided with the constrictions 4KL and 4KR at positions corresponding to the long sides, and forms the exterior surface of the diaper 1. The narrowed portions 4KL and 4KR are provided at the positions of the thighs of the wearer. The cover sheet 4 is provided for reinforcement of the back sheet 5 described later and improvement of texture, and for example, a nonwoven fabric made of a liquid impermeable thermoplastic resin can be used as a material thereof in order to suppress leakage of excrement. Examples of the liquid impermeable thermoplastic resin include Polyethylene (PE), polypropylene (PP), and the like. The cover sheet 4 is not limited to a single-layer structure, and may have a multilayer structure including an inner cover sheet and an outer cover sheet. Further, the function of the cover sheet 4 can be integrated (combined) with the back sheet 5. In the case where the back sheet 5 and the cover sheet 4 are integrated, the front patch sheet 2F is directly joined to the back sheet 5. In the case where the cover sheet 4 is provided and the case where the cover sheet 4 is provided in a multilayer configuration, the front patch sheet 2F is indirectly joined to the back sheet 5.

The diaper 1 further includes a back sheet 5, an absorber 6, and a top sheet 7 laminated in this order on the wearer-side surface of the cover sheet 4. The back sheet 5, the absorbent body 6, and the top sheet 7 are sheet-like members having a substantially rectangular appearance, and are sequentially stacked on the cover sheet 4 in a state where the longitudinal direction coincides with the longitudinal direction of the cover sheet 4. The back sheet 5 is formed of a water-impermeable thermoplastic resin material to suppress leakage of excrement, as in the case of the cover sheet 4. The back sheet 5 is preferably made of a material having moisture permeability together in order to suppress hot flashes in a worn state. The top sheet 7 is a sheet-like member disposed on the skin surface side of the wearer so as to cover the water absorption surface of the absorbent body 6. The topsheet 7 has water permeability in a part or all thereof. Therefore, in a state where the diaper 1 is worn, liquid excreted from the wearer enters the absorbent body 6 through the top sheet 7 that can contact the skin of the wearer, and is absorbed there. For example, woven cloth, nonwoven cloth, and porous film can be used as the material of the top sheet 7. The topsheet 7 may also have hydrophilic properties.

The absorber 6 includes the crotch region 1B and extends in the longitudinal direction at least from the center of the front body region 1F to the center of the rear body region 1R. The top sheet 7 is an example of a water-permeable sheet as a skin-side sheet in the present application, and the back sheet 5 is an example of a water-impermeable sheet as a non-skin-side sheet in the present application.

The backsheet 5, the absorbent member 6, and the topsheet 7 extend from the front body region 1F to the back body region 1R. Thus, when the private parts of the wearer are covered with the cover sheet 4 in which the back sheet 5, the absorbent body 6, and the top sheet 7 are laminated, both longitudinal ends of the back sheet 5, the absorbent body 6, and the top sheet 7 are positioned on the ventral side and the dorsal side of the wearer. That is, the wearer's pudendum is covered with the absorbent body 6 from the abdomen side to the back side of the wearer. Therefore, regardless of which posture the wearer discharges the liquid to the outside of the body, the abdomen and the back of the wearer are directed downward, the discharged liquid contacts the absorbent body 6 via the top sheet 7.

The diaper 1 has elongated belt- like side panels 8R and 8L. The side sheets 8R and 8L are liquid-impermeable sheets provided at portions of the long sides of the top sheet 7. In the side sheets 8R and 8L, similarly to the cover sheet 4, narrowed portions 8KR and 8KL are provided at the portions where the thighs of the wearer are located. Elastic members 8ER, 8EL for forming the three-dimensional gathers 3BR, 3BL are knitted into the side sheets 8R, 8L along the longitudinal direction. When the diaper 1 is in a worn state, that is, when the diaper 1 is in a U-shape side view, the side sheets 8R and 8L are pulled up in the longitudinal direction by the contraction force of the elastic members 8ER and 8EL and rise from the top sheet 7, and become the three-dimensional gathers 3BR and 3BL which prevent the liquid from flowing out.

In the cover sheet 4, an elastic member 4C that prevents a gap from being formed between the diaper 1 and the abdominal circumference of the wearer is provided along the longitudinal direction of the diaper 1 on the inner side in the width direction of the diaper 1 than the elastic members 4SL, 4 SR. The elastic member 4C is provided in accordance with an elastic force (contractive force) or the like required in design in the diaper 1.

The Absorbent body 6 has a structure in which a granular Absorbent resin such as SAP (Super Absorbent Polymer) which is a hydrophilic Polymer having a cross-linked structure and capable of absorbing and retaining water is retained in gaps between cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, and fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate. Thus, in the absorbent body 6, the volume change of the absorbent resin before and after the absorption of the liquid is basically performed in the short fibers holding the absorbent resin in the gaps. Therefore, if the entire absorbent body 6 is viewed in overhead, the thickness of the absorbent body 6 that has absorbed liquid does not have a higher expansion rate than the absorbent resin itself.

The SAP particles of the present embodiment are obtained by granulating a resin composition containing an SAP. The "resin composition containing an SAP" referred to herein is a concept including both a composition composed of only an SAP and a composition containing an SAP as a main component and other substances therein to such an extent that the water absorption is not adversely affected. Examples of the "other substances" include additives (such as a surface modifier added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during synthesis of the SAP, and the like.

The absorbent body 6 may be wrapped with a core wrap sheet 6R, which is not shown in the figure, around the outer periphery thereof. The core wrap sheet 6R is a water permeable sheet made of a nonwoven fabric made of pulp fibers such as paper towels or thin resin fibers, and covers the entire absorbent body 6 to maintain the form of the absorbent body 6 and prevent SAP particles from being dispersed in other structures. Further, since it has water permeability, the passage of urine from the skin surface side to the absorbent body 6 is not obstructed. The core wrap sheet 6R is an example of the cover sheet referred to in the present application.

Fig. 3 is a plan view of the diaper of the embodiment. In this figure, the upper direction is a back region 1R, and the belt 2R and 2L having surface fasteners are provided from the widthwise ends. In the crotch region 1B, side sheets 8R and 8L are provided on the left and right sides in the width direction. Elastic members 8ER, 8EL are knitted into the widthwise center sides of the side sheets 8R, 8L, and the elastic members 8ER, 8EL generate contraction forces to rise from the top sheet 7, thereby forming three-dimensional gathers 8BR, 8BL. A front patch 2F engageable with the surface fastener of the tapes 2R and 2L is joined to the non-skin surface side of the front body region 1F, and the surface fastener of the tapes 2R and 2L can be attached.

The absorbent body 6 covered with another sheet extends from the middle portion of the back body region 1R to the middle portion of the front body region 1F through the inside of the three-dimensional gathers of the crotch region 1B. The absorber 6 and a core wrap sheet 6R covering the absorber, which is not shown in the figure, are joined by heat fusion or the like. The core wrap sheet 6R is joined to the top sheet 7 and back sheet 5 covering the absorbent body 6 by heat fusion or the like. At a portion where the absorbent body 6 does not exist, the top sheet 7 and the back sheet 5 are joined to each other by heat fusion or the like.

Fig. 4 is a sectional view of a front patch portion of the diaper of an embodiment. This figure is a cross-sectional view showing the structure of the diaper 1 in the vicinity of the front body region 1F where the front patch 2F is present on the non-skin surface side, and is obtained by cutting the vicinity of the end of the absorbent body 6 in the longitudinal direction. The front patch 2F is disposed on the non-skin surface side of the front body region, is a hook tape female portion engageable with a mechanical fastener, and can be bonded with tapes 2R and 2L provided with mechanical fasteners protruding in the width direction from the vicinity of the end of the back body region.

The top sheet 7 in this figure is bent along the outer edge of the absorber 6 with the longitudinal end of the absorber 6 wrapped by the core wrap sheet 6R as a starting point, and is brought into contact with the back sheet 5. The top sheet 7 abutting the back sheet 5 extends to the end in the diaper longitudinal direction in a state of being joined to the back sheet 5. On the other hand, the backsheet 5 is not bent at the longitudinal end of the absorbent body 6. Therefore, no step occurs along the longitudinal end of the absorbent body 6 on the non-skin surface side of the cover sheet 4 joined to the back sheet 5, and no step occurs on the surface of the front patch 2F joined to the cover sheet 4. Such a structure can be realized by making the longitudinal length of the top sheet 7 longer than the back sheet 5 in accordance with the thickness of the absorbent body 6. That is, the longitudinal length of the top sheet 7 is longer than the longitudinal length of the back sheet 5.

If the tapes 2R and 2L are attached to the front patch 2F at the positions where there is a step on the surface, the mechanical fasteners attached to the tapes 2R and 2L and the hook tape attached to the front patch 2F may not be sufficiently engaged with each other, and the tapes 2R and 2L may come loose during wearing of the diaper 1.

Conventionally, the position of the front patch 2F is limited to a portion where the absorbent body 6 is laminated on the skin surface side or a portion where the absorbent body 6 is not present, in order to avoid that a step appearing at the end of the absorbent body 6 affects the function of the front patch 2F. With this configuration, the front patch 2F can be freely disposed without being influenced by the position of the absorbent body 6.

Fig. 5 is a cross-sectional view showing an example in which a buffer space is provided at an end of the absorber. This figure is a cross-sectional view showing a different form of the same portion as that of fig. 4. The top sheet 7 in this figure is bent obliquely so as not to follow the side surface of the absorbent body 6 from the longitudinal end of the absorbent body 6 wrapped with the core wrap sheet 6R, passes through a non-joined region of a predetermined length, contacts the back sheet 5, and then extends to the diaper longitudinal end in a state joined to the back sheet 5. In the embodiment of the present figure, the outer edge of the absorbent body 6, the flat-plate-shaped back sheet 5, and the non-joined region of the top sheet 7 form a substantially triangular cushion space 6E.

Since the back sheet 5 is not bent and a step along the end portion in the longitudinal direction of the absorbent body 6 does not occur on the non-skin surface side of the cover sheet 4 joined to the back sheet 5, a step is not generated on the surface of the front patch 2F and the engagement of the mechanical fastener and the hook tape as described above is not adversely affected, which is similar to fig. 4. In the embodiment of the present figure, the inclination of the top sheet 7 at the longitudinal end of the absorbent body 6 is gentle. When the end portion of the absorbent body 6 protrudes at right angles to the skin surface side as shown in fig. 4, the step formed at the end portion of the absorbent body 6 strongly comes into contact with the skin surface, giving discomfort to the wearer and, in some cases, inducing decubitus. On the other hand, in the embodiment of the present figure, the presence of the buffer space 6E makes it difficult for the longitudinal end of the absorber 6 to strongly contact the skin surface, and therefore discomfort given to the wearer is reduced.

The buffer space 6E has another effect. When the amount of exudates is large or the tendency is strong, the exudates enter the absorbent body 6 through the top sheet 7, but sometimes return to the skin surface again from the longitudinal end of the absorbent body 6 without being completely absorbed. Discharge that returns to the skin surface can cause discomfort to the wearer. In addition, when the tendency of the discharge is strong, it may cause abdominal leakage. When the cushion space 6E exists in front of the longitudinal end of the absorbent body 6 as in this figure, the discharged materials that have overflowed from the absorbent body 6 accumulate inside the cushion space 6E before leaking out to the skin surface side beyond the top sheet 7. That is, the buffer space 6E also functions as a liquid storage space.

When the amount of the discharged material overflowing from the absorbent body 6 is smaller than the volume of the buffer space 6E, the discharged material accumulated in the buffer space 6E is absorbed again by the absorbent body 6 with the passage of time. Therefore, the buffer space 6E can prevent the discharge from leaking to the skin surface. Further, since the back sheet 5 is hydrophobic and the discharge does not penetrate through the back sheet 5, the discharge does not leak to the non-skin surface side even if the buffer space 6E is provided.

Fig. 6 is a sectional view showing another example of the buffer space. In the example of the present figure, a core wrap sheet 6R covering the absorber 6 is joined to the inside of the buffer space 6E. The waste accumulated in the buffer space 6E needs to go over the top sheet 7 and leak out to the skin surface side, and needs to go over the core wrap sheet 6R in addition to the top sheet 7. Therefore, the discharge is less likely to leak from the buffer space 6E to the skin surface side. Further, since the core wrap sheet 6R is not present between the absorbent body 6 and the buffer space 6E, the waste accumulated in the buffer space 6E is easily reabsorbed by the absorbent body 6.

Further, if the core wrap sheet 6R is extended inward of the buffer space 6E, the skin surface side of the buffer space 6E is not easily bent along the longitudinal direction end of the absorber 6. Therefore, the longitudinal direction end of the absorber 6 is less likely to strongly contact the skin surface side, and hence discomfort given to the wearer is reduced.

Figure 7 is a plan view of a diaper having a cushioning space. In this figure, the end portion of the cushion space 6E on the outside in the diaper longitudinal direction is substantially orthogonal to the diaper longitudinal direction. That is, the cushion space 6E is provided parallel to the diaper width direction. By providing the buffer space 6E, it is possible to reduce the step that occurs on the skin surface side of the longitudinal end of the absorbent body 6, and it is possible to accumulate the exudates that leak from the end of the absorbent body 6, and to prevent the exudates from returning to the skin surface side.

Further, the step occurring at the end of the absorbent body 6 on the skin surface side becomes a problem mainly with the front body region 1F where the front patch 2F exists. Thus, the cushion space 6E can be provided only in the front body region 1F and not in the rear body region 1R. However, many diaper wearers adopt a supine position, and discharge easily flows toward the back region 1R. As described above, since the buffer space 6E also has an effect of temporarily accumulating the discharge materials, the buffer space 6E is preferably provided also in the back body region 1R.

Fig. 8 is a plan view of the case where the cushioning space is not parallel to the diaper width direction. In this figure, the end portion of the cushion space 6E in the diaper longitudinal direction is saw-shaped. In other words, the end portion of the cushion space 6E on the outside in the diaper longitudinal direction is inclined with respect to the diaper longitudinal direction. When the momentum of the discharged matter is strong, the discharged matter may flow in a straight line in the longitudinal direction in a part of the absorbent body 6 and reach the end portion. Even if such discharge is guided to the buffer space 6E, the discharge is not sufficiently weakened in momentum, and may return to the skin surface side again by the top sheet 7.

Then, in this figure, the end portion on the outer side in the longitudinal direction of the cushion space 6E is inclined with respect to the diaper longitudinal direction. The hot melt adhesive is applied to the non-skin surface side of the top sheet 7, and the exudates flow over the top sheet 7 and leak from the absorbent body side to the skin surface side again, which is more difficult than moving from the skin surface side to the absorbent body side. Therefore, the discharge material having reached the buffer space 6E first spreads into the buffer space 6E to fill the buffer space 6E. Here, since the longitudinal end of the buffer space 6E is inclined with respect to the diaper longitudinal direction, the discharge that flows in a straight line in the longitudinal direction in a part of the absorbent body 6 and reaches the end changes its direction so as to fill the buffer space 6E whose longitudinal end is inclined. Since the momentum of the discharged material is weakened by changing the direction of the flow, the possibility that the discharged material flows back toward the skin surface side again through the top sheet 7 at the longitudinal end of the absorbent body 6 can be further reduced.

Further, if the longitudinal end of the cushion space 6E is inclined in this way, the top sheet 7 also has a slightly undulating shape in the longitudinal end of the absorbent body 6 substantially parallel to the longitudinal direction of the diaper, and is not easily folded all at once toward the non-skin surface side. Therefore, the longitudinal end of the absorber 6 is less likely to strongly contact the skin surface side, and discomfort given to the wearer is reduced.

Fig. 9 is a plan view of the buffer space most expanded at the center in the width direction. In this figure, the diaper longitudinal direction end portions of the buffer space 6E are farthest from the end portions of the absorbent body 6 at the widthwise center of the diaper. Therefore, the buffer space 6E has a substantially isosceles triangular shape with the longitudinal end of the absorber 6 as a base and the longitudinal direction of the diaper as a vertex.

As described above, the posture taken by the diaper wearer is the supine posture at the maximum, and the discharge is discharged along the median line of the human body. When the wearer takes a supine position or a lying down position, the exudates flow in the longitudinal direction at the widthwise center portion of the absorbent body 6, reach the lengthwise end portions of the absorbent body 6 depending on the amount or momentum of the exudates, flow into the buffer space 6E from the widthwise center portion, and are temporarily accumulated.

When the diaper wearer takes another posture such as a lying-on-side posture, the position of the flow into the cushion space 6E may not be the widthwise central portion, but in this case, the flow velocity of the discharged material is restricted by the three-dimensional gathers 3BR, 3BL, and the like and decreases. Thus, the possibility that the exhaust reaches the buffer space 6E is low. Accordingly, it can be said that the portion where the possibility of the discharge flowing into the buffer space 6E is high is the widthwise central portion, and the space in this portion is the most extensive in the diaper of the present figure, so that a large amount of discharge can be effectively accumulated.

Further, the exhaust material reaching the vicinity of the apex portion of the buffer space 6E is sufficiently decelerated in the process. The discharged material changes its flow in the middle, returns to the absorbent body 6 side in an isosceles portion, and is absorbed again by the absorbent body 6. Therefore, by configuring the buffer space 6E in such a shape, the possibility of the discharge passing through the top sheet 7 again and flowing back to the skin surface side can be sufficiently reduced.

Fig. 10 is an exploded perspective view of a diaper provided with a pocket portion on the skin surface side. A pocket portion (pocket portion) may be further provided on the skin surface side of the longitudinal end portion of the diaper 1. The pocket portion may be provided in one or both of the front body region and the back body region. The diaper 1 in this figure has a pocket member 11 in the rear body region and a pocket member 12 in the front body region. The pocket members 11, 12 are hydrophobic.

Pocket members (pocket members) 11, 12 are provided at the skin-most surface side near the longitudinal end portions of the diaper 1, and the width-direction end portions are joined to the side sheets 8R, 8L. Then, all the adjacent sheets including the top sheet 7 are joined to the longitudinal end side. At the longitudinal end portion side, all the sheets originally stacked are joined, and the pocket members 11 and 12 are joined together with all the sheets stacked.

Fig. 11 is a plan view of a diaper provided with a pocket portion on the skin surface side. The pocket members 11, 12 are joined to the side sheets 8R, 8L only at the widthwise ends thereof at the lengthwise center side, and are not joined to the top sheet 7. As described above, the elastic members 8ER, 8EL are fitted to the widthwise central sides of the side sheets 8R, 8L. The widthwise central portions of the side sheets 8R, 8L rise by the urging force of the elastic members 8ER, 8EL to form the three-dimensional gathers 3BR, 3BL. In the side sheets 8R and 8L at the positions where the pocket members 11 and 12 are joined, the elastic members 8ER and 8EL are not present, and the three-dimensional gathers 3BR and 3BL are not formed, but the urging forces of the elastic members 8ER and 8EL are still exerted, and the widthwise central side end portions float. Therefore, the side sheets 8R and 8L are pushed up by the widthwise central side end portions, and the pocket members 11 and 12 are formed in a pocket shape having an opening portion on the crotch region 1B side.

Even if the absorbent body 6 does not completely absorb the discharged materials and reaches the end portion in the longitudinal direction due to a large amount of discharged materials or strong tendency, the discharged materials enter the inside of the pocket-like space formed by the pocket members 11 and 12 and the top sheet 7. The exudates having entered the pocket-like space are temporarily held between the hydrophobic pocket members 11 and 12 and the hydrophobic backsheet 5, do not further flow out to the longitudinal direction end portions, and are gradually absorbed by the absorbent body 6 after that. Therefore, dorsal leakage and abdominal leakage of the exudates can be effectively suppressed.

The pocket members 11, 12 may be provided at one of the longitudinal ends of the diaper 1. As described above, the posture adopted by the diaper wearer is the supine posture at the most, and the discharge tends to flow rapidly toward the back area. Thus, the pocket member 11 is preferably provided in the rear body region 1R. When the wearer is a male and the urethra abutment position is close to the front body region, the discharge may reach the front body region 1F quickly, and therefore, it is significant that the pocket member 12 is provided also in the front body region 1F.

In particular, by the pocket member 12 being present so as to cover the longitudinal end of the absorbent body 6 on the front body region 1F side, the step appearing at the longitudinal end of the absorbent body 6 does not directly contact the skin surface, and discomfort given to the wearer is reduced. Further, when the above-described cushion space 6E is provided in front of the longitudinal direction end portion of the absorbent body 6, discomfort given to the wearer is further reduced by the synergistic effect.

Further, by providing the pocket members 11 and 12 and the buffer space 6E at the same time, a synergistic effect is also produced in terms of prevention of abdominal leakage and dorsal leakage of discharge. As described above, the widthwise central portions of the pocket members 11, 12 on the lengthwise central side are not joined to other sheets, and a pocket-like space open toward the crotch region 1B side is formed between the urging force remaining in the side sheets 8R, 8L constituting the three-dimensional gathers 3BR, 3BL and the topsheet 7. However, in the side sheets 8R and 8L, since no elastic member is present at the position where the pocket members 11 and 12 are joined, the pocket members 11 and 12 cannot reliably float toward the skin surface side to form pocket-like spaces having an opening portion on the crotch region 1B side.

If the exudates flow on the top sheet 7 and reach the longitudinal end without being absorbed by the absorbent body 6 in a state where the crotch region 1B side of the pocket-like space is not opened (in contact with another sheet on the non-skin surface side), the exudates may enter between the pocket members 11, 12 and the skin surface. As described above, since the pocket members 11 and 12 are hydrophobic and cannot absorb the exudates, the exudates directly reach the longitudinal ends. Therefore, if the pocket members 11 and 12 are not properly opened on the crotch region 1B side and the force of discharge is strong, abdominal leakage is likely to be induced.

In the present embodiment, a buffer space 6E is provided between the entrance of the pocket-like space and the end of the absorbent body 6 as shown in the present figure. On the skin surface side of the cushion space 6E, a space is formed below the top sheet 7 (in some embodiments, the top sheet 7 and the core wrap sheet 6R), and the discharge easily accumulates in the cushion space 6E through the top sheet 7. When the momentum of the discharged material is strong, the top sheet 7 may overflow again at the end of the cushion space 6E toward the skin surface, but the overflow portion is formed in a pocket-like space formed between the pocket members 11 and 12 and the top sheet 7.

Therefore, even when the entrance on the crotch region 1B side of the pocket-like space is not opened, by providing the cushion space 6E, the discharge can be guided into the pocket-like space via the cushion space 6E. The excretion flowing into the pocket-like space does not further flow out to the longitudinal direction end portion side, and is gradually absorbed by the absorbent body 6 after a while. By such a mechanism, in the present embodiment, the pocket-like space can be effectively made to function regardless of whether the crotch region 1B side is open or not.

Although the embodiments of the absorbent article of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the pocket members 11, 12 have been described as the non-water-permeable sheets to which no force is applied, but it is also possible to incorporate elastic members in the pocket members 11, 12 to function as waist gathers. Since the pocket portion is located closest to the skin surface, when the pocket members 11 and 12 are formed as waist gathers, the waist gathers can be formed in close contact with the skin surface, and abdominal leakage and back leakage can be strongly suppressed.

The embodiments and application examples disclosed above can be combined separately.

Claims (10)

1. An absorbent article is characterized by comprising:

an absorber (6) that extends in the longitudinal direction from the back region (1R) to the front region (1F) of the wearer and can cover the crotch region;

a water-permeable sheet disposed on the skin surface side of the absorbent body (6);

a water-impermeable sheet disposed on the non-skin surface side of the absorbent body (6);

a hook tape protruding from the end in the width direction of the rear body region (1R) and provided with a mechanical fastener on the skin surface side; and

a front patch which is directly or indirectly joined to a portion of the non-skin surface side of the non-water-permeable sheet corresponding to at least the longitudinal end of the absorbent body and is capable of engaging with the hook tape,

wherein the water-permeable sheet is folded along the end of the absorber toward the non-skin surface side at the longitudinal end of the absorber and reaches the non-water-permeable sheet, and the non-water-permeable sheet is not folded.

2. The absorbent article according to claim 1,

a non-joining region of a predetermined length that does not join the water-permeable sheet and the non-water-permeable sheet is provided in the longitudinal direction from the longitudinal direction end of the absorbent body,

the water-permeable sheet is joined to the non-water-permeable sheet in front of the non-joining region, and the space formed between the water-permeable sheet and the non-water-permeable sheet in the non-joining region is used as a buffer space (6E).

3. The absorbent article according to claim 2,

the absorbent article further includes a cover sheet on the absorbent body side of the water-permeable sheet and the non-water-permeable sheet, the cover sheet covering the outer periphery of the absorbent body.

4. The absorbent article according to claim 3,

in a non-joined region in the cushioning space (6E), the cover sheet is joined to the non-skin surface side of the water-permeable sheet and the skin surface side of the water-impermeable sheet.

5. The absorbent article according to any one of claims 2 to 4,

the end of the cushion space (6E) on the outer side in the longitudinal direction is orthogonal to the longitudinal direction of the absorber.

6. The absorbent article according to any one of claims 2 to 4,

the end of the buffer space (6E) on the outer side in the longitudinal direction is inclined with respect to the longitudinal direction of the absorber.

7. The absorbent article according to any one of claims 2 to 4,

the end portion of the buffer space (6E) on the outer side in the longitudinal direction is farthest from the end portion of the absorber at the center in the width direction of the absorbent article.

8. The absorbent article according to any one of claims 2 to 4,

a pouch member, which is a non-water-permeable sheet covering the skin surface side, is provided in the vicinity of the longitudinal end, and the pouch member is joined to another sheet on the longitudinal end side, and has an opening in the crotch region.

9. The absorbent article of claim 8,

the buffer space (6E) is provided at a position corresponding to the opening of the capsule member.

10. The absorbent article according to claim 1,

the water permeable sheet has a longer longitudinal length than the non-water permeable sheet.

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