JP2023028060A - absorbent article - Google Patents

Abstract

To provide an absorbent article that never impairs design property such as patterns or designs for displaying an exterior appearance, and can inform timing of replacement at a stage of absorbing liquid by sufficiently utilizing absorptive capacity of an absorbent body.SOLUTION: An absorbent article of the present invention has: a crotch part 10C comprising a lengthwise absorbent body 5, and arranged at a wearer's crotch side; a ventral part 10F arranged at the ventral side and a back side part 10R arranged at the back side. The absorbent body 5 has at least one pair of bending guide parts 61 becoming a starting point of bending, and extends along a longitudinal direction. In the crotch part 10C, marking parts 41 along wearer's legs are arranged at the non-skin surface side from the absorbent body 5, and is positioned at an outer side in a width direction from the position of the bending guide part 61. By using the bending guide part 61 as the starting point, it is broken to the wearer's skin surface and can be sandwiched in between the wearer's crotch part, and thereby the marking part 41 hides. As the absorbent body 5 absorbs excreted liquid to increase weight, the crotch part 10C suspends from the wearer's crotch part, and thereby the breaking comes loose, and the marking part 41 appears.SELECTED DRAWING: Figure 2

Description

The present invention relates to absorbent articles such as diapers.

Conventionally, some absorbent articles such as diapers have designs applied to their outer surfaces, and techniques have been proposed for adding functions from a visual point of view through such designs.
For example, Patent Literature 1 describes a wearable article having a waist graphic and a crotch graphic. In this article, the difference between the opacity of the outer cover layer covering the crotch graphic and the opacity of the belt including the waist graphic is less than 20% from the viewpoint of approximating the appearance of underwear.
Patent Literature 2 describes a diaper in which a marker is provided in the vicinity of or overlapping with a bending guide portion of an absorbent body so as to be visible from the outer surface side. There are three bending guide portions and markers near the center of the crotch portion in the width direction, and they extend linearly toward the ventral portion and the dorsal portion. Therefore, the marker is not hidden in the crotch area of the wearer when the diaper is worn, and is always visible from the outer surface side. By looking at the shape of the diaper at the positions of the markers, it is possible to confirm whether the absorbent body is deformed into a W shape at the positions of the three bending guides and whether the diaper is properly worn. .
Apart from this, some diapers are provided with a so-called notification sign that visually indicates the presence or absence of urination (excretion) to the outside. The notification sign is made of, for example, a water-sensitive material, and may change color when exposed to moisture such as urine. This color change makes it possible to recognize the presence or absence of excretion from the outside, that is, it is possible to notify the diaper change timing.
Such a notification sign is usually placed in the center of the crotch part of the diaper from the viewpoint of reliably notifying urination or the like. For example, the positions are often the same as those of the three markers described in Patent Document 2.

Japanese Patent Publication No. 2019-513462 JP 2012-115378 A

The notification sign is positioned at the center in the width direction of the crotch portion of the absorbent article such as a diaper, and is provided as one or a plurality of signs, so that it is conspicuous and the presence or absence of urination or the like is easily recognized.
However, if the notification sign is positioned at a conspicuous position, it may become out of harmony with other patterns and patterns, and the appearance and beauty of the article may be spoiled.
Also, the center of the width direction where the notification sign is located is close to the excretion point of the wearer. Therefore, when the absorber has just absorbed urine or the like and has not yet reached the point where urine or the like leaks out, the notification sign may be discolored or the like. In this case, the diaper is changed before the absorbent body is used up to the upper limit of its absorption capacity. Further, such an increase in the number of exchanges leads to an increase in cost and waste. Therefore, it is desired that the sign indicating the timing of changing the diaper is at the stage when liquid is absorbed up to the widthwise end of the absorbent body and the available absorption capacity is fully utilized.

In view of the above points, the present invention can notify the timing of replacement at the stage of absorbing liquid by fully utilizing the absorption capacity of the absorbent without impairing the design such as patterns and patterns that decorate the appearance. It relates to absorbent articles.

The present invention is an absorbent article comprising a vertically elongated absorbent body and having a crotch portion arranged on the wearer's crotch side, an abdominal portion arranged on the abdomen side, and a dorsal portion arranged on the back side. hand,
The absorbent body is arranged with its longitudinal direction facing the abdominal part, the crotch part, and the back part, and in the crotch part, the absorbent body has at least one pair of bending guide portions serving as starting points of bending of the absorbent body, the bending guide portions extending along the longitudinal direction of the absorbent body,
In the crotch part, an indicator part along the leg circumference of the wearer is arranged on the non-skin surface side of the absorber, and the indicator part is viewed from the non-skin surface side of the crotch part in plan view. sometimes located in the lateral crotch portion positioned outward in the width direction from the position of the bending guide portion,
When the absorbent article is worn, the side crotch portion is folded toward the wearer's skin surface starting from the bending guide portion and is sandwiched between the crotch portion of the wearer, thereby hiding the indication portion and preventing the absorption of the absorbent article. When the absorbent article is worn, as the absorbent body absorbs excrement and increases in weight, the crotch part hangs down from the crotch part of the wearer, and the bending of the side crotch part is loosened and the indicating part is removed. An emerging, absorbent article is provided.

ADVANTAGE OF THE INVENTION The absorbent article of the present invention does not impair the design such as the pattern or picture that decorates the appearance, and can notify the timing of replacement at the stage of absorbing liquid by fully utilizing the absorption capacity of the absorbent body.

1 is a perspective view schematically showing an unfolded state of an underpants-type diaper, which is a preferred embodiment of an absorbent article according to the present invention, immediately before wearing. FIG. FIG. 2 is a developed plan view schematically showing a state in which the pants-type diaper shown in FIG. 1 is broken at the side seal portions, developed and stretched, and viewed from the non-skin surface side. FIG. 3 is a cross-sectional view taken along line III-III in the pants-type diaper shown in FIG. 2; FIG. 4 is a cross-sectional view schematically showing a state in which side crotch portions of the crotch portion shown in FIG. 1. It is explanatory drawing which shows typically the wearing state at the time of wearing the underpants type diaper shown in FIG. 1, when liquid is not absorbed. FIG. 6 is an explanatory view schematically showing a state in which the crotch portion hangs down due to liquid absorption from the state of the underpants type diaper of FIG. FIG. 11 is a cross-sectional view showing another preferred embodiment of the crotch configuration;

A preferred embodiment of the absorbent article of the present invention will be described below with reference to the drawings.

In this specification, the side that comes into contact with the wearer's skin is called the skin side, front side, or inner side, and the opposite side is called the non-skin side, back side, or outer side. These terms are also used as terms that indicate relative positional relationships in the member configuration of the absorbent article, even for members that do not have a surface that contacts the wearer's skin. Further, the direction located in front of the wearer when worn is referred to as the front or front side, and the direction located behind the wearer is referred to as the rear or rear side. The normal direction of the front surface or back surface of the absorbent article is referred to as the thickness direction.

FIG. 1 shows a pants-type diaper 10 (hereinafter also simply referred to as diaper 10), which is a preferred embodiment. The diaper 10 of this embodiment includes an abdominal portion 10F arranged on the abdomen side of the wearer, a crotch portion 10C arranged on the crotch side, and a back portion 10R arranged on the back side. It has an X direction and a Y direction. The diaper 10 also includes a waist opening 12 arranged above the ventral portion 10F and the back portion 10R in the length direction Y, and a pair of leg openings 13, 13 arranged on the left and right sides of the crotch portion 10C. .

The diaper 10 has an absorbent body 1 and an outer body 2 as constituent members. The exterior body 2 has a ventral exterior body 21 and a dorsal exterior body 22 that form external bodies of the ventral part 10F and the dorsal part 10R, respectively. Both side edges of the abdominal exterior body 21 and the dorsal exterior body 22 are overlapped and joined at the side seal portion 11 . Thereby, an annular waist portion 10D in the diaper 10 is formed. Bonding at the side seal portion 11 can be performed by various methods used for this type of article. For example, fusion bonding, pressure bonding (for example, embossing), and the like are consolidation bonding. The absorbent main body 1 forms a crotch portion 10C at portions of the ventral portion 10F and the back portion 10R that further extend from the skin surface side of the exterior body 2 . In the diaper 10 having such a configuration, the open portion above the waist portion 10D serves as the waist opening 12 described above. The left and right open portions of the crotch portion 10C are the pair of leg openings 13, 13 described above.

FIG. 2 shows a state in which the diaper 10 is broken at the side seal portions 11, 11, expanded and stretched, and viewed from the non-skin surface side. Here, the unfolded state refers to a state in which each part is stretched and the diaper 10 is spread flat. In the unfolded state, the aforementioned waist direction X and body length direction Y are also referred to as the width direction X and the longitudinal direction Y. As shown in FIG.
In the unfolded state of the diaper 10, oblong abdominal exterior bodies 21 and dorsal exterior bodies 22 are arranged corresponding to the ventral part 10F and the dorsal part 10R, respectively. The vertically elongated rectangular absorbent main body 1 has its longitudinal direction directed toward the abdominal portion 10F, the crotch portion 10C, and the back portion 10R of the diaper 10 on the skin surface side of the abdominal exterior body 21 and the dorsal exterior body 22. are placed. At the front and rear ends of the absorbent body 1 in the longitudinal direction Y, the ventral exterior body 21 and the dorsal exterior body 22 arranged on the non-skin surface side are respectively folded back to the skin surface side of the absorbent body 1 and joined. there is As a result, the front and back ends of the absorbent main body 1 in the longitudinal direction Y are covered with the abdominal exterior body 21 and the back exterior body 22 on the skin side and the non-skin side.

As shown in FIG. 3, the absorbent main body 1 includes a liquid-permeable topsheet 3 on the skin side, a leak-proof backsheet 4 on the non-skin side, and between the topsheet 3 and the backsheet 4. It has a liquid-retaining absorber 5 disposed thereon. The absorbent main body 1 also has a pair of side sheets 9 on both sides in the longitudinal direction Y thereof. At the tip edge of the side sheet 9, a stretchable elastic body 91 stretched along the longitudinal direction Y is arranged to form a three-dimensional gather. By providing the elastic body 91 in the three-dimensional gathered part, when the diaper is worn as a diaper, the side sheet 9 stands up like a side wall on the side of the top sheet 3 due to the contraction of the elastic body 91, and the width direction X outside the absorbent body 5. It is designed to prevent liquid from flowing out.

Like the absorbent body 1, the absorbent body 5 has a vertically long shape and is arranged with its longitudinal direction directed toward the abdominal portion 10F, the crotch portion 10C, and the back portion 10R of the diaper 10. As shown in FIG. Also, the absorbent body 5 has an absorbent core 6 in which absorbent materials are accumulated and a core wrap sheet 7 covering the outer periphery of the absorbent core 6 . Regarding the core wrap sheet 7, in FIG. 3, one core wrap sheet 7 is wound in the width direction while covering the entirety of the absorbent core 6 in the longitudinal direction Y, and the skin surface side of the absorbent core 6 is wound. (front side), both sides and the non-skin side (back side). Both ends of the wound core wrap sheet 7 in the width direction X are overlapped and joined on the non-skin surface side of the absorbent core 6 . Both ends of the core wrap sheet 7 in the width direction X may be joined at different positions. Moreover, the core wrap sheet 7 may consist of two or more sheets.

In the crotch portion 10C, the absorbent body 5 has bending guide portions that serve as starting points for bending the absorbent body 5 at positions inward from both side edges (both edges in the width direction X) 5E, 5E in the longitudinal direction Y, respectively. 61 at least. The bending guide portion 61 extends along the longitudinal direction Y of the absorbent body 5 . The bending guide portion 61 is preferably arranged in the region of the crotch portion 10C with a length in the longitudinal direction Y shorter than that of the ventral portion 10F and the dorsal portion 10R. Thereby, the balance between the liquid absorbing power and liquid diffusibility of the absorbent core 6 and the good wearing feeling of the diaper 10 can be achieved.

The bending guide portion 61 is a portion of the absorbent body 5 in which bending stress tends to concentrate relatively easily. For example, the bending guide part 61 can be formed as a part having a basis weight lower than that of parts other than the bending guide part 61 . In this case, it is preferable that the absorbent material forming the absorbent core 6 described above has a basis weight lower than that of the portion surrounding the bending guide portion 61 . In the bending guide portion 61, the basis weight of the absorbent material forming the absorbent core 6 is preferably 50 g/m ² or less, for example.

The bending guide portion 61 may be a slit portion arranged in the absorbent body 5 . The slit portion is a space portion in the thickness direction formed by partially separating the accumulated layers of the absorbent material of the absorbent core 6 constituting the absorbent body 5 . The slit portion may be a cut-like portion or a groove having a predetermined width. The slit portion may be a through hole (see FIG. 3) in the thickness direction extending to both the front and back surfaces of the absorbent core 6, or may be a partial hole. The slit portion is preferably a hole formed at least from the skin surface side of the absorbent core 6 in the thickness direction. Such a bending guide portion 61 can be formed, for example, by making a cut in the integrated layer of the absorbent material. Moreover, when forming the absorbent core 6 by accumulating the absorbent material, a non-accumulated portion that is not partially accumulated may be formed and used as the bending guide portion 61 .
If the bending guide portion 61 is a slit portion, the ability to attract excreted fluid is enhanced at that portion. As a result, in the process of diffusing the excreted liquid from the central absorbent section 5L to the side absorbent sections 5H, the excreted liquid can be taken up accurately from the top sheet, and the leakage prevention property of the excreted liquid can be enhanced.

As described above, the two bending guide portions 61 are arranged inward from the left and right side edges 5E, 5E of the absorbent body 5 in the crotch portion 10C, and are spaced apart from each other in the width direction. The absorber 5 has a central absorbent portion 5L divided into two bending guide portions 61 and side absorbent portions 5H, 5H on the left and right sides of the central absorbent portion 5L at the crotch portion 10C.
The central absorbent portion 5L has a length in the width direction X that covers the crotch portion of the wearer. The length of the central absorbent portion 5L in the width direction X is preferably 10% or more, more preferably 15% or more, of the width direction length of the absorber 5 in the crotch portion 10C. The length of the central absorbent portion 5L in the width direction X is preferably 60% or less, more preferably 55% or less, of the length of the absorbent body 5 in the crotch portion 10C in the width direction.

The number of bending guide portions 61 is not limited to two as shown in FIG. 3, and may be three or more. In that case, it is preferable that the space between the outermost bending guide portions 61 in the width direction X becomes the central absorbent portion 5L.

In the diaper 10, the crotch portion 10C including the structure of the absorbent body 5 includes a central crotch portion 10CL located inward in the width direction from the position of the bending guide portion 61 and side crotch portions located outboard in the width direction in plan view. It is divided into 10CH and 10CH. The central crotch part 10CL includes the central absorbent part 5L and has a length in the width direction X covering the wearer's crotch part. The side crotch portion 10CH includes the side absorbent portion 5H, and as shown in FIG. 4, is folded toward the wearer's skin surface starting from the bending guide portion 61 when the diaper 10 is put on.

Furthermore, as shown in FIG. 4, the crotch portion 10C of the diaper 10 has a marking portion 41 along the underbody disposed on the non-skin surface side of the absorber 5. As shown in FIG. The marking portion 41 is located in the side crotch portion 10CH located outside the position of the bending guide portion 61 in the width direction when the non-skin surface side of the crotch portion 10C is viewed in plan.

The indicator part 41 is designed to have a linear or belt-like shape along the undercarriage, arranged so as to be visible from the non-skin surface side, that is, the outer surface side of the side crotch part 10CH. More specifically, the label portion 41 extends toward the ventral portion 10F and the dorsal portion 10R while curving along the leg opening 13 in the side crotch portion 10CH. The range in which the indicating portion 41 extends may be limited to the side crotch portion 10CH, or may extend from the side crotch portion 10CH to the ventral portion 10F and the back portion 10R.
The indicating portion 41 may be a continuous line or an intermittent line such as a dashed line. Further, it may be a group of lines such as double lines or triple lines, or a pattern in which a pattern such as a figure or a pattern is arranged in a line with a predetermined width. It can be a column. Furthermore, it may be arranged by combining characters and patterns.

The marking part 41 is colored in a color different from the basic color (for example, white) of the members forming the outer surface of the diaper 10 so that it can be recognized when the side crotch part 10CH is viewed from the outer surface side of the diaper 10. . The color may be either chromatic or achromatic. In addition, this color may change depending on the wearing state of the diaper 10, or may not change. From the viewpoint of the operation of the side crotch portion 10CH and the indicating portion 41 in the wearing state described below and the function of notifying the timing of diaper change thereby, it is preferable that the color is not changed.
The marking part 41 is located on the non-skin surface side of the absorber 5 and can be arranged in various layers of the member configuration of the crotch part 10</b>C as long as the part is visible from the outer surface side of the diaper 10 . For example, the indicating portion 41 may be arranged on the non-skin surface side of the backsheet 4 or on the skin surface side of the backsheet 4 . Further, the back sheet 4 may be composed of a plurality of layers, and the indicating portion 41 may be arranged between the layers. It is preferable that the plurality of layers consist of a film sheet and a light-transmitting non-woven fabric arranged on the non-skin side thereof, and the indicator part 41 is arranged between the film sheet and the non-woven fabric.
Such a marking portion 41 can be formed by a method commonly used for this type of article. For example, it can be formed on the non-skin side of the back sheet 4, the skin side, or the non-skin side of the absorbent body 3 by printing using ink, pigment, dye, or the like.

From the viewpoint of more effectively notifying the change timing of the diaper 10, which will be described later, and from the viewpoint of more accurately notifying the timing of changing the diaper when the diaper is barely leaking, the marking portion 41 is positioned in the width direction X of the crotch portion 10C. It is preferable that the following range is present at the most constricted position on the inner side of the .
That is, in the plan view of the crotch portion 10C, the label portion 41 is arranged in the longitudinal direction Y of the absorber 5 with respect to the length in the width direction of each of the side absorbent portions 5H, 5H divided by the bending guide portion 61 . It is preferably in the range of 95% or less, more preferably 90% or less from each of both side edges (both edges in the width direction X) 5E, 5E. In particular, the label portion 41 is 0% from both side edges (both edges in the width direction X) 5E and 5E in the longitudinal direction Y of the absorbent body 5, that is, both side edges in the longitudinal direction Y of the absorbent body 5 (both edges in the width direction X). edge) 5E, preferably at 5E.

In the diaper 10, when the diaper 10 is put on, the side crotch portions 10CH are folded toward the wearer's skin surface starting from the bending guide portions 61, and are sandwiched between the crotch portions of the wearer, thereby hiding the display portion 41. As shown in FIG. When the diaper 10 is worn, the absorber 5 absorbs excrement such as urine and increases in weight, so that the crotch part 10C hangs down from the wearer's crotch part. Along with this, the folding of the side crotch portion 10CH is loosened, and the indicating portion 41 comes to appear. This point will be described in more detail below with an example.

First, when wearing the diaper 10, as shown in FIG. 5, the central crotch part 10CL is arranged between the thighs of the wearer W so as to cover the entire crotch part in the width direction. The side crotch parts 10CH on both sides of the crotch part are bent to the wearer's skin surface and enter the boundary between the wearer's crotch part and the inner side surface of the thigh so as to be lifted.
As a result, the indicating portion 41 arranged on the side crotch portion 10CH is hidden between the crotch portion of the wearer W and the inner surface of the thigh. When the diaper 10 has just been put on, there is no or little increase in weight of the absorbent body 5 due to urination or the like, so the folded state is maintained, and the indicating portion 41 is difficult to appear in the appearance. As a result, a person (for example, a guardian or a caregiver) who sees the wearer W wearing the diaper 10 can recognize that there is no excretion.

When the wearer W excretes such as urination while the diaper 10 is worn, the absorber 5 absorbs excreted liquid and increases in weight. Moreover, bulk increases at the same time. When the wearer urinates many times and the amount of liquid absorbed by the absorbent body 5 increases, the lateral crotch portion extends from the central absorbent portion 5L in the central crotch portion 10CL beyond the partition of the bending guide portion 61. Excreted fluid is diffused and absorbed up to the lateral absorption part 5H at 10CH. In this way, a state in which the absorption capacity of the absorbent body 5 is fully utilized is approached. As a result, not only the central absorbent section 5L but also the left and right side absorbent sections 5H and 5H increase in weight and bulk, and the entire absorbent body 5 hangs down (hangs down) in the direction of gravity. At this time, due to the increase in weight, the side absorbing portion 5H tries to return to a flat state due to loosening of the fold starting from the bending guide portion 61 . As a result, the side crotch portion 10CH, on which the indicator portion 41 is arranged, comes out of the state of being sandwiched between the crotch portion and the inner side surface of the thigh at the position around the leg.
As a result, as shown in FIG. 6 , the marking portion 41 on the side crotch portion 10 CH is separated from the inner side surface of the thigh and becomes visible from the outer surface side of the diaper 10 . As a result, the line of the indicating portion 41 of the crotch portion 10C, which was not visible when the diaper 10 was first worn, appears as a sign of the replacement timing.

In this way, the diaper 10 can notify the timing of replacement at the stage when the absorption capacity of the absorbent body 5 is fully utilized and the liquid is absorbed. As a result, the replacement interval can be extended, labor can be reduced, and cost can be reduced.
In addition, when the diaper 10 has just been put on, the markings 41 arranged on the side crotch portions 10CH are made difficult to see, so that the design such as the patterns and patterns that make up the appearance of the diaper is not spoiled. do not have. In addition, the central crotch portion 10CL becomes conspicuous, and the design placed there can be seen more impressively. At the same time, the crotch portion 10C has a neat shape, and the appearance of the diaper 10 itself when worn is improved.
In addition, in the diaper 10, the presence of the bending guide portions 61 makes it easier for the absorber 5 to conform to the skin surface of the wearer when worn. As a result, the crotch portion 10C of the diaper 10 fits the crotch portion of the wearer and provides a good wearing feeling.

In the diaper 10, it is preferable that the stiffness of the central absorbent portion 5L is greater than the stiffness of the side absorbent portions 5H, from the viewpoint of improving the above-described wearing state of the crotch portion 10C and subsequent deformation thereof. In addition, due to this difference in rigidity, the shape of the central absorbent portion 5L is easily retained, and the crotch portion of the wearer is firmly covered and supported, while the side absorbent portions 5H on both sides extend to the crotch portion and the inner surface of the thigh. Soft and fit.
This stiffness means bending stiffness measured by the following method. The difference in rigidity can be imparted by, for example, varying the basis weight of the absorbent cores 6 constituting the central absorbent section 5L and the side absorbent sections 5H, or by varying the material or hardness. . Alternatively, the difference may be provided by forming the absorbent core 6 of the central absorbent portion 5L into a laminate of two or more layers and reducing the number of layers of the absorbent core 6 of the side absorbent portion 5H. . When the absorbent core 6 of the central absorbent portion 5L is a laminate of two or more layers, the bending guide portions 61 are arranged near the central absorbent portion 5L of the side absorbent portions 5H, which have a relatively small number of layers. preferably.

From the viewpoint described above, the difference between the rigidity of the central absorbent portion 5L and the rigidity of the side absorbent portions 5H (former-latter) is preferably 10 kgf/25 mm or more, more preferably 15 kgf/25 mm or more, and further preferably 20 kgf/25 mm or more. preferable.
In addition, the difference between the rigidity of the central absorbent portion 5L and the rigidity of the side absorbent portions 5H (former-latter) is preferably 50 kgf/25 mm or less, more preferably 45 kgf, from the viewpoint of not increasing the rigidity of the central absorbent portion 5L too much. /25 mm or less is more preferable, and 40 kgf/25 mm or less is even more preferable.

(Method for Measuring Rigidity of Central Absorbent Portion 5L and Side Absorbent Portion 5H)
The stiffness of the central absorbent part 5L and the side absorbent part 5H is measured as bending rigidity in the width direction of the diaper, for example, according to Japanese Industrial Standards "JIS L-1096 (general fabric test method)", using a handle meter. can be done.
A square measurement piece of 25 mm×25 mm is cut out from each of the central absorption portion 5L and the side absorption portion 5H. A test piece is placed on a supporting table having a groove of 10 mm width so that the groove and the direction corresponding to the diaper width direction of the measurement piece are perpendicular to each other. The center of the test piece is pushed with a blade having a thickness of 2 mm, and the resistance value (g) when the absorber is pushed by 8 mm is measured with a load cell.
The measurement is performed three times with different test pieces, and the average value is taken as the measured value. Also, the test piece is cut out so as not to include the bending guide portion 61 . If a measuring piece of 25 mm×25 mm cannot be cut out, a smaller measuring piece may be used. In that case, using the measuring pieces of the same size obtained from the central absorbing portion 5L and the side absorbing portions 5H, the width of the groove of the support base is set to 5 mm, and the measurement results are compared.

In addition, in the diaper 10, from the viewpoint of improving the wearing state and subsequent deformation of the crotch portion 10C, it is preferable that the absorption capacity of the central absorbent portion 5L is larger than that of the side absorbent portions 5H. preferable. As a result, when the excreted liquid diffuses to the side absorbent part 5H, it is likely to be in a state where it is at the limit of leakage, and it becomes easier to timely notify the replacement timing at the stage when the absorption capacity of the absorbent body 5 is fully utilized. . This difference in absorption capacity is due to, for example, the basis weight of the absorbent core 6 constituting the central absorbent portion 5L and the side absorbent portion 5H, for example, the basis weight of the superabsorbent polymer material contained in the absorbent core 6. can be granted.

From the viewpoint of making the effect of rigidity and the effect of absorption capacity more pronounced, the basis weight of the superabsorbent polymer material contained in the central absorbent portion 5L is adjusted to that of the superabsorbent polymer material contained in the side absorbent portions 5H. It is preferably 143% or more, more preferably 170% or more, based on the basis weight of the polymer material. Further, the basis weight of the superabsorbent polymer material contained in the central absorbent portion 5L is preferably 900% or less of the basis weight of the superabsorbent polymer material contained in the side absorbent portions 5H. % or less.
Within the above ratio range, the basis weight of the superabsorbent polymer material contained in the central absorbent portion 5L is preferably 100 g/m ² or more, more preferably 120 g/m ² or more. Moreover, the basis weight of the superabsorbent polymer material contained in the central absorbent portion 5L is preferably 450 g/m ² or less, more preferably 430 g/m ² or less.
Further, within the above ratio range, the basis weight of the superabsorbent polymer material contained in the side absorbent portions 5H is preferably 50 g/m ² or more, more preferably 70 g/m ² or more. Moreover, the basis weight of the superabsorbent polymer material contained in the side absorbent portions 5H is preferably 200 g/m ² or less, more preferably 180 g/m ² or less.

Further, in the diaper 10, it is preferable that the core wrap sheet 7 that covers the absorbent core 6 is joined at the front and back sides of the folding guide portions 61 at the portions that cover the front and back sides. As a result, the side absorbing portion 5H can be bent with the bending guide portion 61 as a starting point, and the movability of returning to the flat state after that can be improved.
Various forms of this joining are possible according to the form of the bending guide portion 61 of the core wrap sheet 7 . For example, when the bending guide part 61 is a through hole, it means that the parts covering the front and back of the absorbent core 6 are joined together. In addition, when the bending guide part 61 hits a partial hole and the absorbent core 6 is left because the basis weight is reduced, the absorbent core 6 in the bending guide part 61 is removed. It means that the core wrap sheet 7 is joined to the part.

In the diaper 10, from the viewpoint of further enhancing the bendability of the side absorbent portion 5H, as shown in FIG. is preferably fixed with The elastic body 62 is arranged in a stretched state between the absorbent core 6 and the core wrap sheet 7 to contract the side absorbent portion 5H along the longitudinal direction Y. As shown in FIG. As a result, an urging force is applied in a direction to bend the crotch part 10C of the diaper 10 in the longitudinal direction Y, so that the side crotch part 10CH is lifted more strongly against the boundary between the crotch part and the inner side surface of the thigh part and enters the crotch part. become.
The elastic body 62 may be arranged not only between the absorbent core 6 and the core wrap sheet 7 , but also on the outer surface of the core wrap sheet 7 as long as the above action is exhibited satisfactorily. In addition to or instead of the elastic body 62 , an elastic body may be arranged outside the absorbent body 5 , for example, between the top sheet 3 and the side sheet 9 .

As described above, in the diaper 10, the indication part 41 is arranged in the side crotch part 10CH including the side absorbent part 5H, and the timing of replacement is indicated at the stage when the absorption capacity of the absorbent body 5 is fully utilized and the liquid is absorbed. can let you know.
It is preferable that the indicator 41 notifies the replacement timing at the stage when more liquid is absorbed than the liquid absorption performance to be appealed to the purchaser of the diaper. For example, it is preferable that the indicating portion 41 appears after the usage limit standard described on the package containing the diaper 10 is exceeded. Examples of the use limit criteria include the upper limit criteria for the number of times of urination, the amount of urination, and the wearing time.

Next, for each member that constitutes the diaper 10, those that are normally used in various absorbent articles can be arbitrarily adopted without particular limitation.

Examples of the absorbent body 5 include a stack of hydrophilic fibers, a stack of hydrophilic fibers and superabsorbent polymer material, and a stack of hydrophilic fibers, superabsorbent polymer material and thermoplastic synthetic resin fibers. An absorbent core 6 such as a fibrous body covered with a core wrap sheet 7 may be used. Alternatively, it may be a water-absorbent sheet in which a superabsorbent polymer material is sandwiched between a plurality of fiber sheets. Examples of the hydrophilic fibers include cellulose fibers and synthetic fibers which are hydrophilized with a surfactant or the like, if necessary. Examples of superabsorbent polymer materials include starch-based, cellulose-based, and synthetic polymer-based high-molecular compounds capable of absorbing and retaining water or saline that is 20 or more times their own weight. .
Examples of the core wrap sheet 7 include thin paper such as tissue paper and hydrophilic non-woven fabric.

The surface sheet 3 is made of a member having good texture and liquid permeability. For example, a hydrophilic nonwoven fabric is preferable, such as an air-through nonwoven fabric, a point-bonded nonwoven fabric, a spunbonded nonwoven fabric, a spunlaced nonwoven fabric, and a laminate of these nonwoven fabrics. A sheet material etc. are mentioned. The fibers constituting the non-woven fabric are preferably polypropylene monofilaments, polypropylene-polyethylene conjugate fibers, polyethylene terephthalate-polyethylene conjugate fibers, or the like, which have been subjected to hydrophilization treatment. In addition, a hydrophilic perforated film or a hydrophilic non-woven fabric may be partially overlapped on the non-skin-contacting side of the topsheet 3 in the crotch portion of the topsheet 3 .

As the back sheet 4, a moisture-permeable film alone, a composite sheet obtained by laminating a film and a nonwoven fabric, or a water-repellent nonwoven fabric (SMS, SMMS, etc.) is used. It is preferable to use a moisture-permeable film alone as a leak-proof material from the viewpoint of cost and matching with an anti-slip adhesive. As the film material in this case, a film obtained by melt-kneading and extruding a thermoplastic resin and an inorganic filler incompatible therewith and stretching it to a predetermined size to form micropores, or a film essentially containing moisture. and a non-porous film capable of discharging water vapor like a permeable membrane.

As the side sheet 9, a water-repellent nonwoven fabric is preferable, and water-repellent nonwoven fabrics selected from spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, heat roll nonwoven fabrics, needle punch nonwoven fabrics, etc., or various water repellent nonwoven fabrics are used. be able to. Particularly preferably, for example, spunbond nonwovens, spunbond-meltblown (SM) nonwovens, spunbond-meltblown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown - Spunbond (SSMS) non-woven fabrics, etc. are used.

The exterior body 2 is composed of one or more layers of sheets, and the sheets include nonwoven fabrics manufactured by various methods such as air-through nonwoven fabric, heat-rolled nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, woven fabric, A knitted fabric, a resin film, and the like can be mentioned. In particular, the nonwoven fabric is preferable from the viewpoint of improving air permeability and texture, and the water-repellent nonwoven fabric is preferable from the viewpoint of preventing leakage of excrement.

Examples of various elastic bodies arranged in the diaper 10 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene and neoprene, natural rubbers, EVA, elastic polyolefins, and polyurethanes. As for its form, for example, a thread-like or cord-like (flat rubber or the like) having a rectangular, square, circular, polygonal cross-section, or a multi-filament type thread-like material can be used.

Although the diaper 10 of this embodiment is shown as a pants type diaper, it is not limited to this, and may be a tape type diaper. Further, in the diaper 10 of the present embodiment, the outer body is shown as being separated into front and rear sides, but the present invention is not limited to this and various shapes can be adopted. For example, the outer body may have a shape that covers the entire abdomen portion 10F, crotch portion 10C, and back portion 10R of the diaper 10, and the crotch portion 10C of the diaper 10 may be constricted in the width direction. The shape of the absorbent core 6 is also not limited to that of the present embodiment, and various shapes can be adopted. For example, the planar shape of the absorbent core 6 may be constricted in the width direction X at the crotch portion 10C.

The concept of the absorbent article of the present invention includes sanitary shorts, shorts-type napkins, incontinence pants, and the like, in addition to the diapers of the above embodiments. In addition, other members may be appropriately incorporated into the above configuration according to the application and function.

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1>
An absorbent article comprising a vertically long absorbent body and having a crotch part arranged on the crotch side of the wearer, an abdominal part arranged on the abdomen side, and a dorsal part arranged on the back side,
The absorbent body is arranged with its longitudinal direction facing the abdominal part, the crotch part, and the back part, and in the crotch part, the absorbent body has at least one pair of bending guide portions serving as starting points of bending of the absorbent body, the bending guide portions extending along the longitudinal direction of the absorbent body,
In the crotch part, an indicator part along the leg circumference of the wearer is arranged on the non-skin surface side of the absorber, and the indicator part is viewed from the non-skin surface side of the crotch part in plan view. sometimes located in the lateral crotch portion positioned outward in the width direction from the position of the bending guide portion,
When the absorbent article is worn, the side crotch portion is folded toward the wearer's skin surface starting from the bending guide portion and is sandwiched between the crotch portion of the wearer, thereby hiding the indication portion and preventing the absorption of the absorbent article. When the absorbent article is worn, as the absorbent body absorbs excrement and increases in weight, the crotch part hangs down from the crotch part of the wearer, and the bending of the side crotch part is loosened and the indicating part is removed. An emerging absorbent article.

<2>
The absorbent article according to <1>, wherein the bending guide portion is a portion having a basis weight lower than that of portions other than the bending guide portion.
<3>
The absorbent article according to <1>, wherein the bending guide portion is a slit provided in the absorbent body.
<4>
In the crotch part, the absorbent body has a central absorbent part divided by the bending guide part and side absorbent parts on the left and right outer sides of the central absorbent part, and the rigidity of the central absorbent part is The absorbent article according to any one of <1> to <3> above, wherein the rigidity is greater than that of the side absorbent portions.
<5>
In the crotch part, the absorbent body has a central absorbent part divided by the bending guide part and lateral absorbent parts on the left and right outer sides of the central absorbent part, and the absorption capacity of the central absorbent part is The absorbent article according to any one of <1> to <4>, wherein the absorbent capacity of the side absorbent portions is large compared to that of the side absorbent portions.
<6>
The absorbent body has an absorbent core in which absorbent materials are accumulated and a core wrap sheet covering the front and back surfaces of the absorbent core, and the portions of the core wrap sheet covering the front and back sides of the bending guide portion are joined front and back. The absorbent article according to any one of <1> to <5> above.
<7>
<1>, wherein a stretchable elastic body is fixed in a stretched state along the longitudinal direction to a side edge of the side absorbent portion located outside the bending guide portion in the width direction of the absorbent body; The absorbent article according to any one of <6>.
<8>
<1> to <7> above, wherein the absorbent article is configured such that the indicating portion appears after the usage limit standard described on the package containing the absorbent article is exceeded. 2. The absorbent article according to any one.

1 Absorbent Main Body 11 Side Seal Part 12 Waist Opening 13 Leg Opening 2 Exterior Body 21 Abdominal Exterior Body 22 Back Exterior Body 3 Topsheet 4 Backsheet 41 Marking Part 5 Absorber 5L Central Absorbent Part 5H Side Absorbent Part 5E Longitudinal side edge of absorber (widthwise edge)
6 Absorptive core 61 Bending guide part 62 Elastic body 7 Core wrap sheet 9 Side sheet 91 Elastic body 10 Diaper 10F Abdominal part of diaper 10C Crotch part of diaper 10CL Central crotch part 10CH Side crotch part 10R Back part of diaper 10D diaper waist X width direction (or width direction of absorbent body, waist circumference direction)
Y longitudinal direction (length direction or longitudinal direction of absorbent body)

Claims (8)

An absorbent article comprising a vertically long absorbent body and having a crotch part arranged on the crotch side of the wearer, an abdominal part arranged on the abdomen side, and a dorsal part arranged on the back side,
The absorbent body is arranged with its longitudinal direction facing the abdominal part, the crotch part, and the back part, and in the crotch part, the absorbent body has at least one pair of bending guide portions serving as starting points of bending of the absorbent body, the bending guide portions extending along the longitudinal direction of the absorbent body,
In the crotch part, an indicator part along the leg circumference of the wearer is arranged on the non-skin surface side of the absorber, and the indicator part is viewed from the non-skin surface side of the crotch part in plan view. sometimes located in the lateral crotch portion positioned outward in the width direction from the position of the bending guide portion,
When the absorbent article is worn, the side crotch portion is folded toward the wearer's skin surface starting from the bending guide portion and is sandwiched between the crotch portion of the wearer, thereby hiding the indication portion and preventing the absorption of the absorbent article. When the absorbent article is worn, as the absorbent body absorbs excrement and increases in weight, the crotch part hangs down from the crotch part of the wearer, and the bending of the side crotch part is loosened and the indicating part is removed. An emerging absorbent article. 2. The absorbent article according to claim 1, wherein said bending guide portion is a portion having a basis weight lower than that of portions other than said bending guide portion. 2. The absorbent article according to claim 1, wherein said bending guide portion is a slit provided in said absorbent body. In the crotch part, the absorbent body has a central absorbent part divided by the bending guide part and side absorbent parts on the left and right outer sides of the central absorbent part, and the rigidity of the central absorbent part is 4. The absorbent article according to any one of claims 1 to 3, wherein the stiffness is greater than that of the lateral absorbent parts. In the crotch part, the absorbent body has a central absorbent part divided by the bending guide part and lateral absorbent parts on the left and right outer sides of the central absorbent part, and the absorption capacity of the central absorbent part is 5. The absorbent article according to any one of claims 1 to 4, wherein the absorbent capacity of the side absorbent portions is large. The absorbent body has an absorbent core in which absorbent materials are accumulated and a core wrap sheet covering the front and back surfaces of the absorbent core, and the portions of the core wrap sheet covering the front and back sides of the bending guide portion are joined front and back. The absorbent article according to any one of claims 1 to 5. Claims 1 to 1, wherein a stretchable elastic body is fixed in a stretched state along the longitudinal direction to a side edge of the lateral absorbent portion of the absorbent body, which is positioned outward in the width direction from the bending guide portion. 7. The absorbent article according to any one of 6. 8. The absorbent article according to any one of claims 1 to 7, wherein the indicating portion appears after the usage limit of the absorbent article exceeds the limit of use indicated on the package containing the absorbent article. 1. The absorbent article according to item 1.

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