JP2023005661A - absorbent article - Google Patents

Abstract

[PROBLEMS] To provide an absorbent article in which excrement is less likely to flow backward from longitudinal ends to the skin surface.
An absorbent article comprising a plurality of sheets encompassing a wearer's crotch region from the front body region to the back body region, the absorbent article extending longitudinally from the front body region to the back body region. and an absorbent body capable of absorbing discharge in the crotch region, and a covering sheet covering the skin side and the non-skin side of the absorbent body, wherein the covering sheet is provided at longitudinal ends of the absorbent body. an absorbent article further comprising a non-adhesive area where the skin surface side and the non-skin surface side are not adhered in a predetermined range further from the part, and a space formed between the covering sheets in the non-adhesive area is used as a liquid storage space. .
[Selection drawing] Fig. 1

Description

The present invention relates to absorbent articles.

A diaper, which is an absorbent article, is required to have the function of retaining excretion discharged from the human body and preventing leakage from the diaper. Generally speaking, a diaper has a structure in which the internal structure regulates the movement of excreted matter while guiding fluid to an absorbent body that has a function of semi-solidifying, holds the exuded matter, and prevents leakage.

The amount and momentum of the ejected material, as well as the ejection direction, vary, and the internal structure for regulating the movement also varies. For example, in Patent Document 1, a plurality of pleats are provided in the longitudinal direction of the skin side sheet to reduce momentum of the discharged matter, and openings are further provided in the pleats to directly transfer the discharged matter to the absorbent body, thereby discharging the discharged matter to the absorbent body. Techniques for efficiently absorbing substances have been disclosed.

JP-A-9-74392

Even if the exudate once enters the absorbent body, it may flow back to the skin surface at the end of the absorbent body without being able to suppress its momentum. Excretion that has flowed back to the skin surface may flow directly on the skin surface and cause abdominal leakage or back leakage.

In order to solve the above problems, in the present invention, a liquid storage space is provided at the longitudinal end of the absorbent body to suppress backflow of discharged matter leaked from the absorbent body onto the skin surface.

Specifically, the present invention relates to an absorbent article comprising a plurality of sheets including a crotch region from the front body region to the back body region of the wearer, wherein an absorber extending in the longitudinal direction and capable of absorbing excrement in the crotch region; and a covering sheet covering the skin side and the non-skin side of the absorber, wherein the covering sheet A non-adhesive area is provided in a predetermined range from the longitudinal end of the body so that the skin surface side and the non-skin surface side are not adhered, and the space formed between the covering sheets in the non-adhesive area is defined as the liquid storage space. It is an absorbent article.

A longitudinally outer end of the liquid containing space may be substantially perpendicular to the longitudinal direction of the absorber.

The longitudinal outer end of the liquid containing space may be oblique to the longitudinal direction of the absorber.

A longitudinally outer end of the liquid containing space may be farthest from an end of the absorbent body in the widthwise center of the absorbent article.

The covering sheet may be a single hydrophilic sheet that covers the entire absorbent body.

The covering sheet is composed of a skin-side sheet laminated on the skin side and a non-skin-side sheet laminated on the non-skin side, the skin-side sheet having hydrophilicity, and the non-skin side. The sheets are hydrophobic and are adhered to each other at the ends of the liquid containing space in the longitudinal direction. It extends to the ends of the regions, but may have different longitudinal lengths.

The end portion of the front body region of the absorbent body exists in the region where the hook tape female portion exists on the non-skin surface side, and the skin surface side sheet is located between the longitudinal end portion of the absorbent body and the non-skin surface side. The liquid storage space is formed by bending along the side sheet, and the non-skin side sheet does not need to bend along the edge of the absorbent body.

In the vicinity of the ends in the longitudinal direction, a garment bag member may be provided which is a hydrophobic sheet that covers the skin surface side, the ends in the longitudinal direction are adhered to another sheet, and the crotch region has an opening in the direction of the crotch region. .

The liquid storage space may be provided at a position corresponding to the opening of the garment bag member.

According to the present invention, it is possible to suppress backflow of excrement from the end portion of the absorbent body to the skin surface, so that abdominal leakage and back leakage from the absorbent article can be effectively suppressed.

1 is a perspective view of a diaper according to an embodiment; FIG. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a plan view of the diaper according to the embodiment. FIG. 4 is a plan view when the end space is not parallel to the width direction of the diaper. FIG. 5 is a plan view in which the end space is widest at the center in the width direction. FIG. 6 is a cross-sectional view showing an example of the end space. FIG. 7 is a cross-sectional view showing an example of the end space. FIG. 8 is a cross-sectional view showing an example of an end space when a front patch exists on the non-skin surface side. FIG. 9 is an exploded perspective view of a diaper having pockets on the skin side. FIG. 10 is a plan view of a diaper having pockets on the skin side. FIG. 11 is a diagram showing the synergistic effect of the end space and the pocket.

A diaper according to an embodiment of the present invention will be described below with reference to the drawings. The configurations of the following embodiments are 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" in the present application, and hereinafter simply referred to as a "diaper") has a front body and a back facing the wearer's abdomen. The longitudinal direction is the direction connecting the back body that is arranged as the back body. Between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (center in the longitudinal direction), there is an inseam that is placed in the wearer's crotch (placed facing the crotch) department is located. In addition, in a state in which the diaper is worn by the wearer (hereinafter abbreviated as "wearing state"), the side facing the wearer's skin (the inner side in the worn state) is the skin side, and the opposite side of the skin side. The side (the outer side when worn) is the non-skin side. Furthermore, the direction connecting the skin surface side and the non-skin surface side is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, viewing from the thickness direction is defined as planar view.

FIG. 1 is a perspective view of a diaper according to this embodiment. The diaper 1 has a crotch region 1B corresponding to the crotch covering the genitals of the wearer when worn, and a front body region 1F positioned in front of the crotch region 1B and corresponding to the wearer's front body. , and a back body region 1R which is positioned behind the crotch region 1B and corresponds to the back body of the wearer (hereinafter referred to as the 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 back body region 1R. When the tapes 2L and 2R are attached to the front patch 2F in a state in which the front body region 1F is arranged on the abdomen side of the wearer and the back body region 1R is arranged on the back side of the wearer, the diaper 1 can be put on. It is secured to the wearer's body in a manner that surrounds the wearer's waist and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can walk while wearing the diaper 1 .

In the diaper 1, an absorbent body capable of absorbing and retaining liquid is mainly arranged around the crotch region 1B. In addition, in the diaper 1, in order to suppress the formation of gaps between the diaper 1 and the skin of the wearer, which will serve as an outflow path for the liquid, the parts surrounding the wearer's legs (thighs) are provided with Leg gathers 3AL and 3AR are provided, three-dimensional gathers 3BL and 3BR are provided inside the diaper 1 in the width direction of the leg gathers 3AL and 3AR, and waist gathers 3R are provided around the waist of the wearer. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are in close contact with the wearer's skin due to the elastic force of the elastic members. Therefore, the liquid discharged from the wearer's pubic region is absorbed by the absorber of the diaper 1 without leaking from the diaper 1 . As the elastic member, thread-like or band-like rubber can be appropriately selected.

FIG. 2 is an exploded perspective view of the diaper according to the embodiment. As illustrated, the diaper 1 is composed of a plurality of sheets and has a complicated structure. The diaper 1 has a cover sheet 4 forming an outer surface in the worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with constrictions 4KL and 4KR provided at portions corresponding to the long sides, and forms the exterior surface of the diaper 1 . The constrictions 4KL and 4KR are provided at sites where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the later-described back sheet 5 and to improve its texture. For example, a non-woven fabric made of liquid-impermeable thermoplastic resin is used as its material in order to suppress leakage of excrement. be able to. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may have a multi-layer structure having an inner cover sheet and an outer cover sheet.

The diaper 1 has a back sheet 5 , an absorbent body 6 and a top sheet 7 which are laminated in order on the surface of the cover sheet 4 facing the wearer. The back sheet 5, the absorbent body 6, and the top sheet 7 are all sheet-like members having a substantially rectangular appearance, and are laminated in order on the cover sheet 4 with their longitudinal directions aligned with the longitudinal direction of the cover sheet 4. there is Like the cover sheet 4, the back sheet 5 is a sheet made of a liquid-impermeable thermoplastic resin in order to prevent leakage of excrement. The back sheet 5 is preferably made of a material that is also moisture-permeable in order to prevent stuffiness when worn. The top sheet 7 is a sheet-like member that is placed on the wearer's skin side so as to cover the absorbent surface of the absorbent body 6 . This top sheet 7 has liquid permeability in part or in its entirety. Therefore, in the state in which the diaper 1 is worn, the liquid excreted by the wearer passes through the top sheet 7, which can come into contact with the wearer's skin, and enters the absorbent body 6, where it is absorbed. For example, woven fabrics, non-woven fabrics, and porous films can be used as materials for the top sheet 7 . The top sheet 7 may have hydrophilicity.

The absorber 6 includes the crotch region 1B and extends longitudinally from the center of the front body region 1F to the center of the back body region 1R. The top sheet 7 and the back sheet 5 are examples of the covering sheet referred to in the present application. The top sheet 7 is an example of the skin-side sheet referred to in the present application, and the back sheet 5 is an example of the non-skin-side sheet referred to in the present application.

The backsheet 5, absorbent body 6, and topsheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the cover sheet 4, in which the back sheet 5, the absorbent body 6, and the top sheet 7 are laminated, covers the genital area of the wearer, the longitudinal ends of the back sheet 5, the absorbent body 6, and the top sheet 7 are It is in a state of being positioned on the wearer's ventral side and dorsal side. In other words, the wearer's pubic area is covered with the absorber 6 from the wearer's ventral side to the dorsal side. Therefore, the discharged liquid comes into contact with the absorbent body 6 via the top sheet 7 regardless of whether the wearer discharges the liquid to the outside of the body, either with the wearer's stomach facing downward or with the back facing downward. will do.

The diaper 1 also has elongated belt-like side sheets 8R and 8L. The side sheets 8R and 8L are liquid-impermeable sheets provided on the long side portions of the top sheet 7. As shown in FIG. As with the cover sheet 4, the side sheets 8R and 8L are provided with constrictions 8KR and 8KL at portions where the wearer's thighs are positioned. Elastic members 8ER and 8EL for forming the three-dimensional gathers 3BR and 3BL are woven into the side sheets 8R and 8L along the longitudinal direction. The side sheets 8R, 8L are drawn in the longitudinal direction by the contractile force of the elastic members 8ER, 8EL and stand up from the top sheet 7 when the diaper 1 is in a state of being worn, that is, when the diaper 1 is in a U-shape when viewed from the side. , three-dimensional gathers 3BR and 3BL for preventing liquid from flowing out.

In the cover sheet 4, an elastic member 4C for preventing a gap from being formed between the diaper 1 and the waist circumference of the wearer is provided inside the diaper 1 in the width direction of the elastic members 4SL and 4SR in the longitudinal direction of the diaper 1. are set along. 4 C of elastic members are provided according to the elastic force (contraction force) etc. which are requested|required by design in the diaper 1. As shown in FIG.

The absorber 6 is a sheet having a thickness capable of absorbing discharged matter. The absorber 6 absorbs and retains water in the gaps between cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate, which are hydrophilized. It has a structure in which a granular absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer having a crosslinked structure capable of absorbing, is retained. Therefore, in the absorbent body 6, the volume change of the absorbent resin before and after absorbing the liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when looking at the entire absorbent body 6, it can be said that the expansion coefficient of the thickness of the absorbent body 6 that has absorbed the liquid is not as large as the expansion coefficient of the absorbent resin itself.

The SAP particles of the present embodiment refer to granulated resin compositions containing SAP. The "resin composition containing SAP" as used herein refers to both a composition consisting only of SAP and a composition containing SAP as a main component and other substances to the extent that it does not adversely affect water absorption. It is a concept that includes Examples of "other substances" include additives (such as surface modifiers added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during the synthesis of SAP, and the like.

Note that the absorbent body 6 may be wrapped with a core wrap sheet 6R (not shown). The core wrap sheet 6R is a water-permeable sheet made of a non-woven fabric made of pulp fibers such as tissue paper or thin resin fibers, and covers the entire absorbent body 6 to maintain the shape of the absorbent body 6 and provide SAP. Prevent particles from scattering to other structures. Moreover, because of its water permeability, it does not prevent passage of urine from the skin surface side to the absorbent body 6 . The core wrap sheet 6R is also an example of the covering sheet referred to in the present application.

FIG. 3 is a plan view of the diaper according to the embodiment. In this figure, the upper direction is the back body region 1R, and tapes 2R and 2L provided with hook-and-loop fasteners are provided from the ends in the width direction. Inseam region 1B
is provided with side sheets 8R and 8L on the left and right in the width direction. Elastic members 8ER and 8EL are woven into the center of the side sheets 8R and 8L in the width direction, and the contractile force of the elastic members 8ER and 8EL rises from the top sheet 7 to form three-dimensional gathers 8BR and 8BL. A front patch 2F is adhered to the non-skin surface side of the front body region 1F, and hook-and-loop fasteners 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 through the inside of the three-dimensional gathers of the crotch region 1B to the middle portion of the front body region 1F. The absorbent body 6 is adhered to another sheet covering the absorbent body 6 by hot melt or the like. When the other sheets are the top sheet 7 and the back sheet 5, the other sheets are adhered to each other by hot-melt or the like in areas where the absorbent body 6 does not exist.

End spaces 6E, which are non-bonded regions where the absorbent body 6 does not extend and where other sheets are not bonded, are present in predetermined ranges from both ends of the absorbent body 6 in the longitudinal direction. The end space 6E is an example of the liquid storage space referred to in the present application. In this figure, the outer end portion of the end space 6E in the longitudinal direction of the diaper is substantially perpendicular to the longitudinal direction of the diaper. The wearer's exudates pass through the top sheet 7 and reach the absorbent body 6, where they are absorbed into the absorbent body 6 and gelled. However, if the discharge has a strong momentum or a large amount, the discharge overflows from the longitudinal end of the absorbent body 6 before being gelled in the absorbent body 6, and passes through the top sheet 7 again at that position. It may return to the skin side. The discharge that returns to the skin side gives discomfort to the wearer. Also, if the discharge has a strong momentum, the discharge may further exceed the side gathers 3R and cause abdominal leakage and back leakage.

In this regard, if the end space 6E exists as shown in this figure, the discharge overflowing from the longitudinal end of the absorbent body 6 will pass through the top sheet 7 again and return to the skin surface side. , is temporarily stored in the end space 6E. It is rare for a large amount of discharge to occur continuously and vigorously, and most of the discharge stored in the end space 6E is absorbed in a short period of time without passing through the top sheet 7 again. Reabsorbed by the body 6. In this way, the existence of the end space 6E can prevent the discharge overflowing from the longitudinal ends of the absorbent body 6 from returning to the skin surface side again.

FIG. 4 is a plan view when the end space is not parallel to the width direction of the diaper. In this figure, the diaper longitudinal direction end of the end space 6E is serrated. In other words, the outer end of the end space 6E in the longitudinal direction of the diaper is slanted with respect to the longitudinal direction of the diaper. When the momentum of the discharged matter is strong, the discharged matter may flow along a part of the absorbent body 6 in a straight line in the longitudinal direction and reach the end. Even if such discharged matter is guided to the end space 6E, the momentum of the discharged matter cannot be sufficiently weakened, and there is a possibility that the discharged matter may pass through the top sheet 7 again and return to the skin side.

Therefore, in this figure, the longitudinally outer end of the end space 6E is inclined with respect to the longitudinal direction of the diaper. A hot-melt adhesive is applied to the non-skin surface side of the top sheet 7, and the excretion leaks from the absorbent side to the skin side again over the top sheet 7 because it moves from the skin side to the absorbent side. more difficult than to Therefore, the effluent reaching the end space 6E first spreads inside the end space 6E and attempts to fill the end space 6E. Here, since the ends in the longitudinal direction of the end spaces 6E are slanted with respect to the longitudinal direction of the diaper, the discharged matter that flows straight in the longitudinal direction through a part of the absorbent body 6 and reaches the ends is The longitudinal ends turn to fill the beveled end spaces 6E. By changing the direction of flow, the momentum of the exuded matter is weakened, so that the possibility of the exuded matter passing through the top sheet 7 again at the longitudinal ends of the absorbent body 6 and flowing back to the skin side can be further reduced. .

FIG. 5 is a plan view in which the end space is widest at the center in the width direction. In this figure, the ends in the diaper longitudinal direction of the end spaces 6E are farthest from the ends of the absorbent body 6 at the center in the width direction of the diaper. Therefore, the end space 6E has a substantially isosceles triangle shape with the longitudinal end of the absorbent body 6 as the base and the longitudinal direction of the diaper as the vertex.

The most common posture taken by diaper wearers is the supine posture, and waste is discharged along the midline of the human body. When the wearer is in a supine position or a prone position, the discharged matter flows in the widthwise central portion of the absorbent body 6 in the longitudinal direction, and depending on the amount and force of the discharged matter, the longitudinal ends of the absorbent body 6 may flow. , and flows into the end space 6E from the center in the width direction to be temporarily stored.

When the diaper wearer takes another posture such as a sideways posture, the position where the diaper flows into the end space 6E may not be the center in the width direction. and so on. Therefore, it is unlikely that the discharge will reach the end space 6E. Therefore, it can be said that the place where there is a high possibility that the discharged matter flows into the end space 6E is the central portion in the width direction. can be stored effectively.

Furthermore, the emissions that reach near the top of the end space 6E are sufficiently decelerated in the process. The discharged matter changes its flow on the way, flows through the equilateral portion, returns to the absorbent body 6 side, and is reabsorbed by the absorbent body 6 . Therefore, it is possible to sufficiently reduce the possibility that the discharged matter will pass through the top sheet 7 again and flow back to the skin side.

FIG. 6 is a cross-sectional view showing an example of the end space. FIG. 6 is a cross-sectional view showing the internal structure of the end space 6E, which is obtained by cutting the vicinity of the longitudinal end of the absorbent body 6 in the longitudinal direction. The right side of the figure is the crotch direction, and the left side is the end portion direction. Also, the upper side of the drawing is the skin surface side, and the lower side of the drawing is the non-skin surface side. The absorbent body 6 is wrapped in a core wrap sheet 6R, and a top sheet 7 having water permeability and good touch is laminated on the skin side, and a non-water-permeable back sheet 5 is laminated on the non-skin side. ing. A cover sheet 4 is laminated on the non-skin surface side of the back sheet 5 .

The absorbent body 6 and the core wrap sheet 6R, the core wrap sheet 6R and the top sheet 7, and the back sheet 5 are each bonded with a hot-melt adhesive or the like. The top sheet 7 and the back sheet 5 are directly bonded with a hot-melt adhesive or the like in the end direction where the absorbent body 6 does not exist. The absorbent body 6 is wrapped with a core wrap sheet 6R, and the core wrap sheet 6R is further wrapped with a top sheet 7 and a back sheet 5 to form a multiple covering structure.

Although the lengths of the top sheet 7 and the back sheet 5 in the longitudinal direction are different, they are aligned and adhered to each other at the ends in the longitudinal direction. On the other hand, the two sheets are not bonded in a predetermined range from the longitudinal end of the absorbent body 6 . Therefore, either seat can play in the area. This play becomes a constant space at the ends of the absorbent body 6 in the longitudinal direction (that is, the end space 6E).

In the example of this figure, the end of the core wrap sheet 6R is extended from the longitudinal end of the absorbent body 6 to the end space 6E, and the space surrounded by the top sheet 7, the back sheet 5, and the core wrap sheet 6R is the end. Let's call it a club space 6E. In the configuration shown in this figure, no sheet exists between the absorbent body 6 and the end space 6E. For this reason, the discharged matter that has flowed through the interior of the absorbent body 6 and reached the longitudinal end of the absorbent body 6 can easily flow into the end space 6E without being obstructed by other sheets, and can also reach the absorbent body 6. Easily reabsorbed.

Further, two sheets, a core wrap sheet 6R and a top sheet 7, are present in the skin surface direction of the end space 6E, and both sheets are adhered with a hot-melt adhesive or the like. In order for the discharge that has flowed into the end space 6E to leak out to the skin side, it is necessary to pass through the two sheets that are adhered with a hot-melt adhesive or the like, even though they are hydrophilic. Therefore, in this configuration, it is possible to effectively prevent backflow of excrement from the end space 6E to the skin surface side. Since the back sheet 5 and the cover sheet 4 are hydrophobic, the discharged material reaching the end space 6E does not flow to the non-skin side of the diaper.

FIG. 7 is a cross-sectional view showing an example of the end space. This figure is also a sectional view showing the internal structure of the end space 6E, similar to FIG. In this figure as well, it is the same as in FIG. 6 that the end space 6E is formed by the play caused by the difference in length between the top sheet 7 and the back sheet 5 in the longitudinal direction. In the example shown in this figure, the core wrap sheet 6R is adhered to the longitudinal ends of the absorbent body 6 without any gaps. Therefore, the end space 6</b>E becomes a space surrounded by the top sheet 7 and the back sheet 5 .

In the example of this figure, the discharged matter that has flowed inside the absorbent body 6 and reached the longitudinal end of the absorbent body 6 is sufficiently decelerated when passing through the core wrap sheet 6R. When stored, it does not have enough velocity to flow back through the topsheet 7 . Also, there may be a case where the core wrap sheet 6R prevents the liquid from flowing into the end space 6E in the first place.

In the form of this figure, the end space 6E is formed between the top sheet 7, the core wrap sheet 6R, and the back sheet 5. As shown in FIG. Since the back sheet 5 is impermeable to water, the waste does not permeate. Further, when the core wrap sheet 6R and the top sheet 7 are compared, the core wrap sheet 6R is thinner and moisture permeates easily. Therefore, the discharged matter stored in the end space 6</b>E eventually passes through the core wrap sheet 6</b>R, reaches the absorbent body 6 again, and is absorbed by the absorbent body 6 . Therefore, even if the form as shown in FIG. 7 is adopted, the same effect as in FIG. 6 can be obtained by the end space 6E.

FIG. 8 is a cross-sectional view showing an example of an end space when a front patch exists on the non-skin surface side. This figure is a cross-sectional view showing the structure near the end space 6E where the front patch 2F exists 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 arranged on the non-skin surface side of the front body region, and is a hook tape female portion to which tapes 2R and 2L having hook-and-loop fasteners projecting in the width direction from the vicinity of the end of the back body region can be attached. On the skin surface side of the front patch 2F, longitudinal ends of the absorber 6 and end spaces 6E are present.

In the form shown in FIGS. 6 and 7, the top sheet 7 and the back sheet 5 are bent and adhered to each other beyond the end space 6E. Therefore, the non-skin surface side of the diaper 1 has a step. However, if the front patch 2F is placed on the non-skin side of this position, a step appears on the non-skin side surface of the front patch 2F as well. If the hook-and-loop fasteners included in the tapes 2R and 2L are attached to the stepped portion, there is a possibility that the engaging force between the hook-and-loop fasteners and the hook-and-loop fastening portion may be insufficient.

Therefore, in the embodiment shown in this figure, the back sheet 5 is not bent at the end side of the end space 6E, and only the top sheet 7 is bent in the non-skin surface direction and adhered to the back sheet 5 beyond the end space 6E. do. According to this embodiment, the front patch 2F is adhered to the flat back sheet 5 (and the cover sheet 4), so the function of the front patch 2F is not impaired.

Conventionally, the position of the front patch 2F is limited to the position where the absorbent body 6 is laminated on the skin surface side so that the step appearing at the end of the absorbent body 6 does not affect the function of the front patch 2F. It was done. In the form of this figure, the front patch 2F can be freely changed without being influenced by the position of the absorbent body 6. FIG.

Further, bending the top sheet 7 along the longitudinal ends of the absorbent body 6 has been conventionally practiced. However, in this case, there is a problem that a step is formed on the skin surface side at the position. This level difference gives discomfort to the skin surface of the wearer and may cause skin troubles. Here, the diaper 1 according to the present application includes end spaces 6E at the ends of the absorbent body 6 in the longitudinal direction. The end space 6E, which does not store the discharged matter, is hollow inside and can freely change its shape. Therefore, the top sheet 7 bends along the skin surface at the position where the end space 6E exists. Therefore, the edge space 6E reduces the step formed at the longitudinal edge of the absorbent body 6, and provides a diaper that is comfortable to wear.

FIG. 9 is an exploded perspective view of a diaper having pockets on the skin side. A pocket portion (clothing bag portion) can be further provided on the skin surface side of the longitudinal end portion of the diaper 1 . The pocket portion can be provided in either 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 back body region and a pocket member 12 in the front body region. Pocket members 11 and 12 are hydrophobic.

The pocket members (clothing bag members) 11 and 12 are provided closest to the skin surface near the longitudinal ends of the diaper 1, and the widthwise ends are adhered to the side sheets 8R and 8L. Furthermore, all adjacent sheets including the top sheet 7 are adhered on the longitudinal end side. All the originally laminated sheets are adhered on the longitudinal end side, and the pocket members 11 and 12 are additionally adhered together with all the laminated sheets.

FIG. 10 is a plan view of a diaper having pockets on the skin side. The central sides in the longitudinal direction of the pocket members 11 and 12 are adhered to the side sheets 8R and 8L only at the widthwise end portions, and are not adhered to the top sheet 7 . As described above, the elastic members 8ER and 8EL are incorporated in the width direction central sides of the side sheets 8R and 8L. The central portions in the width direction of the side sheets 8R, 8L are raised by the biasing force of the elastic members 8ER, 8EL to form three-dimensional gathers 3BR, 3BL. The elastic members 8ER and 8EL are not present on the side sheets 8R and 8L at the positions where the pocket members 11 and 12 are adhered, and the three-dimensional gathers 3BR and 3BL are not formed. is still extended, and the widthwise center side edge is raised. For this reason, the pocket members 11 and 12 are pushed up by the widthwise center side end portions of the side sheets 8R and 8L, and the pocket members 11 and 12 are shaped like pockets having openings on the side of the crotch region 1B.

Even if the waste reaches the longitudinal end portion without being absorbed by the absorber 6 due to a large amount of discharge or a strong momentum, the waste will be absorbed into the pocket formed by the pocket members 11 and 12 and the top sheet 7. Enter the inside of the shaped space. Discharged matter that has entered the pocket-like space is temporarily held between the hydrophobic pocket members 11 and 12 and the hydrophobic back sheet 5, does not flow out further toward the ends in the longitudinal direction, and is eventually absorbed. It is gradually absorbed by the body 6. Therefore, it is possible to effectively suppress back leakage and abdominal leakage of excrement.

Note that the pocket members 11 and 12 may be provided on either one of the longitudinal ends of the diaper 1 . As described above, the most common posture taken by diaper wearers is the supine posture, and discharge tends to flow vigorously toward the back body region. Therefore, it is preferable to provide the pocket member 11 in the back body region 1R. If the wearer is male and the urethra contact position is close to the front body region, excretions may reach the front body region 1F with great force. be.

FIG. 11 is a diagram showing the synergistic effect of the end space and the pocket. This figure is a view of the front body region 1F of the diaper 1 viewed from the skin surface side of the crotch region 1B. As described above, the width direction central portion of the pocket member 12 on the longitudinal direction central side is not adhered to other sheets, and the urging force remaining in the side sheets 8R, 8L constituting the three-dimensional gathers 3BR, 3BL A pocket-like space opened toward the crotch region 1B is formed between the top sheet 7 and the top sheet 7. - 特許庁However, in the side sheets 8R and 8L, since the elastic member does not exist at the position where the pocket member 12 is adhered, the pocket member 12 is surely lifted to form a pocket shape having an opening on the side of the crotch region 1B. It is not possible to form a space of

If the crotch region 1B side of the pocket-shaped space is not open (in contact with another sheet on the non-skin surface side), excreted matter is not absorbed by the absorbent body 6 and flows over the top sheet 7. When reaching the longitudinal ends, the exudate may become trapped between the pocket member 12 and the skin surface. As mentioned above, the pocket member 12 is hydrophobic and cannot absorb exudates, so the exudates reach the longitudinal ends directly. For this reason, if the crotch region 1B side of the pocket member 12 is not properly opened and the force of the discharge is strong, it is likely to induce abdominal leakage.

Therefore, in this embodiment, an end space 6E is provided between the entrance of the pocket-like space and the end of the absorbent body 6, as shown in this figure. On the skin surface side of the end space 6E, there is a space under the top sheet 7 (the top sheet 7 and the core wrap sheet 6R depending on the embodiment), and discharges can easily pass through the top sheet 7 to reach the end. It is stored in the internal space 6E. When the force of the discharged matter is strong, it may pass through the top sheet 7 again at the end of the end space 6E and overflow onto the skin side. It will be in a pocket-like space formed in the

Therefore, even if the entrance of the pocket-shaped space on the side of the crotch region 1B is not open, by providing the end space 6E, waste can be discharged into the pocket-shaped space via the end space 6E. can lead. The discharged matter that has flowed into the pocket-shaped space does not flow out further toward the longitudinal end portions, and is gradually absorbed by the absorbent body 6 before long. With such a mechanism, in the present embodiment, the pocket-like space can be effectively functioned regardless of whether the crotch region 1B side is open or not.

Although the embodiments of the absorbent article according to the present invention have been described above, the content of the present invention is not limited to the above embodiments. For example, in the above embodiment, the pocket members 11 and 12 are non-biased water-impermeable sheets, but elastic members may be woven into the pocket members 11 and 12 to function as waist gathers. Since the pocket portion is the closest to the skin surface, if the pocket members 11 and 12 are formed with waist gathers, the waist gathers that adhere to the skin surface can be realized, and abdominal leakage and back leakage can be strongly suppressed. Moreover, the contents of the present invention are applicable not only to tape-type diapers but also to pants-type diapers and pad-type absorbent articles.

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

1 Diaper 1R Back body region 1B Inseam region 1F Front body regions 2R, 2L Tapes 2F, 2F1, 2F2 Front patches 3BL, 3BR Three-dimensional gathers 4 Cover sheet 5 Back sheet 6 Absorbent body 6R Core wrap sheet 6E End space 7 Top sheet 8R, 8L Side sheets 11, 12 Pocket member

Claims (9)

An absorbent article comprising a plurality of sheets that includes a crotch region from a wearer's front body region to a back body region,
an absorber longitudinally extending from the front body region to the back body region and capable of absorbing exudates in the crotch region;
a covering sheet covering the skin side and the non-skin side of the absorber;
provided with
The covering sheet has a non-adhesive region in which the skin surface side and the non-skin surface side are not adhered to each other in a predetermined range from the longitudinal end of the absorbent body, and is formed between the covering sheets in the non-adhesive region. Let the space where the
absorbent article. The longitudinally outer end of the liquid containing space is substantially perpendicular to the longitudinal direction of the absorber,
The absorbent article according to claim 1. The outer end in the longitudinal direction of the liquid containing space is oblique to the longitudinal direction of the absorber,
3. The absorbent article according to claim 1 or 2. The outer end in the longitudinal direction of the liquid containing space is farthest from the end of the absorbent body at the center in the width direction of the absorbent article,
The absorbent article according to any one of claims 1-3. The covering sheet is a sheet that covers the entire absorbent body and has hydrophilicity.
The absorbent article according to any one of claims 1-4. The covering sheet consists of a skin side sheet laminated on the skin side and a non-skin side sheet laminated on the non-skin side,
The skin side sheet has hydrophilicity,
The non-skin side sheet has hydrophobicity,
bonded to each other at the ends of the liquid containing space in the longitudinal direction,
The skin-side sheet and the non-skin-side sheet both extend from the end of the front body region to the end of the back body region, but have different lengths in the longitudinal direction.
The absorbent article according to any one of claims 1-4. the end of the front body region of the absorbent body exists in the region where the hook tape female portion exists on the non-skin surface side,
the skin-side sheet is bent along the longitudinal ends of the absorber and the non-skin-side sheet to form the liquid storage space;
The non-skin side sheet does not bend along the edge of the absorbent body,
The absorbent article according to claim 6. In the vicinity of the longitudinal end portion, a garment bag member is provided, which is a hydrophobic sheet covering the skin side, the longitudinal end side of which is adhered to another sheet, and the crotch region direction is an opening,
The absorbent article according to any one of claims 1-7. The liquid storage space is provided at a position corresponding to the opening of the garment bag member,
The absorbent article according to claim 8.

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