JP2022104284A - Absorbent article - Google Patents

Abstract

To provide an absorbent article in which a sensor is used repeatedly easily, the sensor can be easily placed at an appropriate position, and come-off of the sensor can be prevented.SOLUTION: An absorbent article 1 is provided with a surface sheet 2, an outside sheet 10, and an absorber 4. The outside sheet 10 has: a first nonwoven fabric 12; and a second a nonwoven fabric 13 which is disposed on the first nonwoven fabric with a part or the whole thereof overlapped. In a part of an overlapping region 14, a sensor pocket 15 where a sensor for detecting a change occurring to the absorbent article is placeable inside is formed. The overlapping region 14 has fixing regions F1 to F3 where the first nonwoven fabric and the second nonwoven fabric are bonded in three directions around the sensor pocket 15, and in the remaining one direction, an insertion port 15a of the sensor is formed. At least in a part of a region where the sensor pocket 15 in the overlapping region 14 is formed, the elasticity of the first nonwoven fabric 12 and the elasticity of the second nonwoven fabric 13 mutually differ.SELECTED DRAWING: Figure 5

Description

The present invention relates to an absorbent article and a method for detecting a change in an absorbent article.

For the purpose of reducing the burden of long-term care, there is known a technique of detecting and notifying the urination of a disposable diaper wearer by a urination sensor. As a method for detecting urination, for example, a method for detecting a temperature or humidity increased by urination is known.
Further, Patent Document 1 discloses a sensor system having anti-suffocation characteristics, and Patent Document 1 discloses a sensor by bonding an additional material to the inner or outer surface of a layer facing clothing. It is described to form a pocket for placement (see Patent Document 1).
Further, Patent Document 2 describes that the sensor is directly attached and fixed to the non-skin facing surface side of the absorbent article.
Further, in Patent Document 3, a sensor that detects urination by a change in impedance is used as an absorbent article that can be attached to and detached from the outer surface side of the absorbent article, and is an elastic member on the non-skin facing surface side of the absorbent body of the absorbent article. There has been proposed an absorbent article in which two sheets provided at the free end are arranged so that a part of the free end side overlaps with each other to form a sensor mounting portion (see Patent Document 3).

Japanese Unexamined Patent Publication No. 2016-214903 Japanese Unexamined Patent Publication No. 2015-027391 Japanese Unexamined Patent Publication No. 2015-027322

Disposal of absorbent articles In the method of detecting urination and defecation by arranging a sensor on the opposite side of the diaper, the sensor directly touches the excrement, so cleaning is required to reuse the sensor, which is hygienic. There is a problem.
In the method of directly attaching the sensor to the non-skin facing surface side of the disposable diaper, there is a concern that the sensor may come off from the absorbent article due to vibration due to the wearer's activity or deterioration of the adhesive force due to repeated use. Also in the method of attaching the sensor in Patent Document 1, there is a possibility that the sensor may fall out of the pocket depending on the posture and activity of the wearer. The techniques of Patent Documents 2 and 3 have room for improvement in terms of prevention of unintentional detachment of the sensor and ease of attachment of the sensor.

An object of the present invention is to provide an absorbent article and a method for detecting a change in an absorbent article, which can solve the above-mentioned problem to be solved by the prior art.

The present invention relates to an absorbent article comprising a surface sheet located on the skin facing surface side, an outer sheet located on the non-skin facing surface side, and an absorber disposed between the surface sheet and the outer sheet.
The outer sheet has a first nonwoven fabric and a second nonwoven fabric arranged in a state where a part or all of the first nonwoven fabric is overlapped on the non-skin facing surface side as a constituent material of the outermost surface of the absorbent article.
In a part of the overlapping region where the first nonwoven fabric and the second nonwoven fabric overlap, the first nonwoven fabric and the second nonwoven fabric are not bonded, and a sensor for detecting changes occurring in the absorbent article is arranged inside. Possible sensor pockets are formed. The overlapping region has a fixed region in which the first nonwoven fabric and the second nonwoven fabric are joined in three directions around the sensor pocket, and an insertion port for the sensor is formed in the remaining one direction. The elasticity of the first nonwoven fabric and the second nonwoven fabric are different from each other in at least a part of the region where the sensor pocket is formed in the overlapping region.

Further, the present invention is a method for detecting a change in an absorbent article, wherein the sensor is arranged in the sensor pocket of the absorbent article, and the sensor is used to detect a change in the absorbent article due to excretion of the wearer. Is to provide.

According to the absorbent article of the present invention, the sensor can be easily used repeatedly, the sensor can be easily arranged at an appropriate position, and the sensor can be prevented from falling off.
According to the change detection method for absorbent articles of the present invention, the sensor can be easily used repeatedly, the sensor can be easily placed in an appropriate position, and the sensor can be prevented from being unintentionally dropped or removed. , Changes that occur in the absorbent article due to the wearer's excretion can be easily detected.

FIG. 1 is a perspective view showing a disposable diaper according to the first embodiment of the present invention. FIG. 2 is a view of the unfolded state of the disposable diaper shown in FIG. 1 as viewed from the skin facing surface side. FIG. 3 is a view of the unfolded state of the disposable diaper shown in FIG. 1 as viewed from the non-skin facing surface side. FIG. 4 is a plan view showing a base sheet, a first non-woven fabric, and a second non-woven fabric constituting the outer sheet of the disposable diaper shown in FIG. FIG. 5 is an enlarged view of the vicinity of the sensor pocket 15 of FIG. 6A and 6B are cross-sectional views taken along the line XX of FIG. 5, where FIG. 6A is a cross-sectional view before inserting the sensor, and FIG. 6B is a cross-sectional view after inserting the sensor. FIG. 7 is a view corresponding to FIG. 3 showing a disposable diaper according to a second embodiment of the present invention. FIG. 8 is a perspective view showing a disposable diaper according to a third embodiment of the present invention. FIG. 9 is a view corresponding to FIG. 3 showing a disposable diaper according to a third embodiment of the present invention. FIG. 10 is a view corresponding to FIG. 5 showing a main part of the disposable diaper according to the fourth embodiment of the present invention. FIG. 11 is a view corresponding to FIG. 6 showing a main part of the disposable diaper according to the fourth embodiment of the present invention. FIG. 12 is a view corresponding to FIG. 3 showing a disposable diaper according to still another embodiment of the present invention.

Hereinafter, the present invention will be described based on the preferred embodiment thereof.
As shown in FIG. 1, the disposable diaper 1 (hereinafter, also referred to as diaper 1) according to the first embodiment of the present invention is a pants-type disposable diaper.
As shown in FIG. 2, the diaper 1 is arranged between the surface sheet 2 located on the skin facing surface side, the multi-layered outer sheet 10 located on the non-skin facing surface side, and the surface sheet 2 and the outer sheet 10. The absorber 4 is provided. More specifically, a liquid-permeable surface sheet 2, a liquid-impermeable or water-repellent leak-proof sheet 3, and a liquid-retaining absorber 4 arranged between the surface sheet 2 and the leak-proof sheet 3. It is equipped with. In the diaper 1 of the present embodiment, the surface sheet 2, the absorbent body 4, and the leak-proof sheet 3 are laminated and integrated in this order on the absorbent main body 5 and the non-skin facing surface side of the absorbent main body 5. It is positioned and includes an exterior body 7 made of an outer sheet 10 that fixes the absorbent body 5.

The diaper 1 has a ventral portion A arranged on the ventral side of the wearer at the time of wearing, a dorsal portion B arranged on the dorsal side, and a crotch portion C located between them.
The vertical direction X of the absorbent article is a direction from the front side to the back side of the wearer when worn, and in a disposable diaper, a direction from the ventral side portion A to the dorsal side portion B via the inseam C. The horizontal direction Y is a direction orthogonal to the vertical direction X.
The diaper 1 of the present embodiment is a pants-type disposable diaper, in which both side edges of the ventral side A and both side edges of the dorsal side B are joined to each other, whereby a pair of side seal portions 16 , 16, waist opening 17, and pair of leg openings 18, 18.

As the surface sheet 2, the leak-proof sheet 3, and the absorber 4, various types conventionally used for this type of article can be used without particular limitation. For example, as the surface sheet 2, various non-woven fabrics, perforated films, and the like can be used, and as the leak-proof sheet 3, a resin film, a laminated sheet of a resin film and a non-woven fabric, and the like can be used. The absorber 4 is an absorbent core made of a fiber material such as pulp fiber, or an absorbent core made of a mixed fiber material such as particles of a highly absorbent polymer and a fiber material such as pulp fiber. Can be covered with a core wrap sheet made of thin leaf paper, a liquid-permeable non-woven fabric, or the like.

The outer sheet 10 forming the exterior body 7 of the diaper 1 has a multilayer structure in which two or more non-woven fabrics are laminated in the thickness direction, and as shown in FIG. 4, the base sheet 11 and the base sheet 11 It has a first nonwoven fabric 12 arranged on the non-skin facing surface side, and a second nonwoven fabric 13 arranged in a state where a part of the first nonwoven fabric 12 is overlapped on the non-skin facing surface side. Both the first nonwoven fabric 12 and the second nonwoven fabric 13 are constituent materials on the outermost surface of the absorbent article.
More specifically, the first nonwoven fabric 12 has a portion arranged on the ventral side A and a portion arranged on the inseam C, but does not have a portion arranged on the dorsal side B. The second nonwoven fabric 13 has a portion arranged on the dorsal side portion B and a portion arranged on the crotch portion C, but does not have a portion arranged on the ventral side portion A. In the second nonwoven fabric 13, the band-shaped end region 13a on the ventral side A side overlaps with the non-skin facing surface side of the strip-shaped end region 12a on the dorsal side B side in the first nonwoven fabric 12. The overlapping portion between the first nonwoven fabric 12 and the second nonwoven fabric 13 is the overlapping region 14.
In the present embodiment, the overlapping region 14 is a region between the edge portion 12d on the dorsal side B side of the first nonwoven fabric 12 and the edge portion 13u on the ventral side A side of the second nonwoven fabric 13 in the vertical direction X of the diaper. Is.
The skin-facing surface is a surface that faces the wearer's skin side when worn, and the non-skin-facing surface is a surface that faces the wearer's skin side when worn. The first nonwoven fabric 12 and the second nonwoven fabric 13 may have a portion folded back toward the skin facing surface side of the exterior body 7 at the peripheral edge of the waist opening 17.

As shown in FIGS. 5 and 6, a portion where the first nonwoven fabric 12 and the second nonwoven fabric 13 are not joined is formed in a part of the overlapping region 14, and the portion is the diaper 1 (the diaper 1 ( It is a sensor pocket 15 in which a sensor 8 for detecting a change occurring in an absorbent article) can be arranged inside. As shown in FIG. 5, the overlapping region 14 is a fixed region F1 to which the first nonwoven fabric 12 and the second nonwoven fabric 13 are joined in three directions around the sensor pocket 15 in a plan view of the overlapping region 14. It has F3, and a sensor insertion port 15a is formed in the remaining one direction. The insertion port 15a extends and opens in a direction orthogonal to the direction (insertion direction) in which the sensor 8 is inserted into the sensor pocket 15 through the insertion port 15a. In the present embodiment, the orthogonal directions coincide with the lateral direction Y. That is, the insertion port 15a extends in the lateral direction Y.

In the present embodiment, the three directions are the left and right two directions and the dorsal side B direction when viewed from the central portion of the sensor pocket 15, and the remaining one direction is the abdomen when viewed from the central portion of the sensor pocket 15. Side A direction. Further, in the first nonwoven fabric 12, the surface facing the skin is bonded to the non-skin facing surface of the base sheet 11 with an adhesive. On the other hand, the second nonwoven fabric 13 is bonded to the non-skin facing surface of the first nonwoven fabric 12 with an adhesive in the fixed regions F1 to F3 located in the overlapping region 14, and the base sheet is formed in the portion other than the overlapping region 14. It is bonded to the non-skin facing surface of 11 with an adhesive. The adhesive may be an adhesive coated on the entire surface without gaps, or may be an adhesive coated by pattern coating such as a spiral pattern, a dot pattern, or an Ω-shaped pattern. As the adhesive, an adhesive conventionally used for this kind of article can be used without particular limitation, and a hot melt type adhesive is preferable. It is also preferable that the adhesive for fixing the second nonwoven fabric 13 has a stronger adhesive force in the portion adjacent to the sensor pocket 15 than the other portions by a method such as different types of adhesives and basis weights.

In the present embodiment, the first nonwoven fabric 12 is a non-stretchable nonwoven fabric, and the second nonwoven fabric 13 is an elastic nonwoven fabric. Therefore, the elasticity of the second nonwoven fabric 13 is higher than that of the first nonwoven fabric 12 in the entire region where the sensor pocket 15 is formed in the overlapping region 14. Stretchability refers to the property of stretching by pulling and contracting by releasing the tension state, and the more it contracts to a length closer to the length before stretching, the higher the elasticity.

The stretchable non-woven fabric has elasticity. The term "having elasticity" means that the maximum elongation in the expansion / contraction direction is preferably 50% or more. The "maximum elongation" is the elongation rate when the object to be measured is stretched to a length that cannot be stretched any further (the length immediately before the material is broken), and is calculated by the following formula (1).
Maximum elongation (%) = {(length after extension-length before extension) / length before extension} x 100% ... (1)
The maximum elongation can be measured by the following procedure. In the natural state of the measurement target (contracted state of the elastic member), a mark with an interval of 50 mm is placed at the center of the measurement target in the expansion / contraction direction, and the interval between the marks is measured and used as the “length before extension”. .. Next, the measurement target is stretched in the expansion / contraction direction until just before the measurement target breaks the material, and the distance between the marks in the stretched state is measured and used as the “length after stretching”. Then, these measured values are substituted into the above equation (1) to calculate the maximum elongation. A measurement target cut out from an absorbent article may be used as a measurement sample for measurement.

The stretchable nonwoven fabric preferably has a maximum elongation of 50% or more and an elongation recovery rate of 70% or more, at least in the lateral direction Y. The elongation recovery rate of the stretchable nonwoven fabric is measured by the following measuring method.
<Measurement method of elongation recovery rate>
A sample piece having a length of 50 mm and a width of 25 mm is cut out from the non-woven fabric to be measured. A sample piece is fixed between chucks (chuck spacing K0) of a tensile tester (Orientec Co., Ltd. "Tencilon" RTC-1150A) in a non-stretchable and slack state, and the chuck spacing is widened at a tensile speed of 300 mm / min. After pulling the sample piece to the length K2 (= K0 × 2) when the sample piece is 100% stretched, the chucks are narrowed at the same speed as the tensile speed, and the tensile stress becomes 0. Let the length of the sample piece in 1 be the length K1 after elongation and recovery. The elongation recovery rate at 100% elongation of the non-woven fabric to be measured is calculated by the following equation.
Elongation recovery rate at 100% elongation (%) = [(K2-K1) / (K2-K0)] × 100

Examples of the stretchable nonwoven fabric include (1) a stretchable nonwoven fabric in which an expandable fiber layer is integrated on both sides or one side of an elastic fiber layer, and (2) a fiber that can be stretched on both sides or one side of a net-shaped elastic sheet. Stretchable non-woven fabric with integrated layers, (3) Stretchable non-woven fabric with stretchable fiber layers integrated on both sides or one side of an elastic sheet made of elastic film, (4) One-way without crossing each other A stretchable non-woven fabric or the like in which a large number of elastic filaments arranged so as to extend to the stretchable fiber layer are integrated with an stretchable fiber layer can be preferably used.
The "extensible fiber layer" referred to here is defined as a fiber layer that can be stretched before being integrated with an elastic material, and can be stretched by machining or the like after being integrated with an elastic material. Includes a fibrous layer.
As a method of integrating the elastic fiber layer and the stretchable fiber layer, for example, a method of laminating them and entwining the fibers by water flow entanglement or air through, a method of joining by heat embossing, an adhesive, ultrasonic waves or the like. Can be mentioned. The stretchable nonwoven fabric can be produced, for example, according to the method described in JP-A-2009-61743.

The non-woven fabric having lower elasticity among the first nonwoven fabric 12 and the second nonwoven fabric 13 may be a nonwoven fabric having elasticity or a nonwoven fabric having no elasticity. In the present embodiment, the first non-woven fabric 12 which is a non-stretchable non-woven fabric corresponds to this. The maximum elongation in the lateral direction Y of the non-stretchable nonwoven fabric having no elasticity is usually less than 50%, more preferably 40% or less, and may be 0%. As the non-stretchable non-woven fabric, a non-woven fabric produced by various manufacturing methods can be used. Examples of the non-woven fabric include spunbonded non-woven fabric, air-through non-woven fabric, needle punched non-woven fabric and the like. The non-stretchable nonwoven fabric may have a single-layer structure or a laminated structure in which two or more layers are laminated.

At least of the first nonwoven fabric 12 and the second nonwoven fabric 13 in the overlapping region 14 from the viewpoint of making it easier to insert the sensor 8 and holding the sensor 8 more stably in a state where the sensor 8 is pressurized as described later. On the other hand, it is preferable that the insertion port 15a has elasticity in the extending direction. For example, the stretchable nonwoven fabric used as the second nonwoven fabric 13 in the present embodiment preferably has elasticity in the lateral direction Y, which is a direction parallel to the extending direction of the insertion port 15a.
The stretchable nonwoven fabric may have elasticity in the lateral direction Y, but may have elasticity in addition to the lateral direction Y. The same applies to the case where the stretchable nonwoven fabric is used as the first nonwoven fabric 12 instead of the second nonwoven fabric 13.

The sensor 8 inserted into the sensor pocket 15 from the insertion port 15a due to the difference in elasticity between the first nonwoven fabric 12 and the second nonwoven fabric 13 in at least a part, preferably the entire area where the sensor pocket 15 is formed. However, the non-woven fabric 12 and the second non-woven fabric 13 are in a pressurized state and are stably held in the sensor pocket 15. Of the first nonwoven fabric 12 and the second nonwoven fabric 13, the sensor indicates that the second nonwoven fabric 13 arranged outside the sensor pocket 15 in the thickness direction has higher elasticity than the first nonwoven fabric 12 arranged inside. It is preferable because the pressurized state of the sensor 8 is easily maintained in the pocket 15.
As an embodiment in which the elasticity of the first nonwoven fabric 12 and the second nonwoven fabric 13 are different in a part of the region where the sensor pocket 15 is formed, for example, the sensor pocket 15 has a maximum depth L5 (see FIG. 5). The elasticity of the first nonwoven fabric 12 and the second nonwoven fabric 13 is obtained only in the region 15b on the insertion port 15a side when the region 15b on the insertion port 15a side and the region 15c on the back side in the insertion direction are divided into two equal parts. Different forms and the like can be mentioned.

According to the diaper 1 of the present embodiment, since the sensor pocket 15 is formed in the overlapping region 14 of the first nonwoven fabric 12 and the second nonwoven fabric 13 as the constituent material of the outermost surface of the absorbent article, the skin of the diaper. Unlike the case where the sensor is arranged on the facing surface side, since the sensor 8 does not directly touch the excrement, problems such as hygiene and failure prevention are less likely to occur, and the sensor 8 can be easily reused. Further, since the sensor 8 is sandwiched between the first nonwoven fabric 12 and the second nonwoven fabric 13 and stably held by making the elasticity of the first nonwoven fabric 12 and the second nonwoven fabric 13 different, the sensor 8 is inserted. It is possible to achieve both the ease and the difficulty of the sensor 8 falling out of the sensor pocket 15 due to changes in the wearer's activity and posture. Further, by providing the sensor pocket 15 at a preferable portion according to the physical characteristics measured by the sensor 8, the sensor 8 can be easily arranged at an appropriate position.
In this way, according to the diaper 1 of the present embodiment, it is easy to use the sensor repeatedly, the sensor can be easily arranged at an appropriate position, and the sensor can be prevented from falling off.

As the sensor 8, a sensor of each knowledge capable of detecting changes occurring in the absorbent article can be used without particular limitation. The changes that occur in the absorbent article are preferably changes that occur due to the wearer's excretion, such as a temperature sensor that can measure the temperature that rises due to urination, a humidity sensor that can measure the humidity that rises due to urination, and changes due to urination. Examples thereof include a sensor capable of measuring impedance, an odor sensor capable of measuring odor caused by urination or defecation, and the like. These sensors may be capable of measuring two or more physical properties, and for example, the temperature sensor and the humidity sensor may be sensors capable of measuring both temperature and humidity.
When a temperature sensor is used, for example, the sensor is placed in the sensor pocket to monitor the temperature of the diaper while wearing it, and the temperature rise on the first non-woven fabric 12 side caused by the wearer's urination is determined to have urinated. , The wearer's urination can be detected, which can be useful for determining when to change the diaper 1. When a humidity sensor is used, for example, the sensor is placed in the sensor pocket to monitor the humidity of the diaper while wearing it, and the increase in humidity caused by the wearer's urination is determined to have caused urination, thereby causing the wearer to urinate. Can be detected. When a humidity sensor is used, it is preferable that the leak-proof sheet 3 and the first non-woven fabric 12 or the like outside the leak-proof sheet 3 have moisture permeability.

The sensor pocket 15 preferably has a size that allows the entire sensor 8 to be arranged inside. By allowing the entire sensor 8 to be accommodated so as not to be exposed to the outside, it is possible to prevent the sensor from falling off from the absorbent article due to the wearer's own direct contact with the main body of the sensor 8.
The maximum depth L5 of the sensor pocket 15 is preferably 40 mm or more, more preferably 45 mm or more, preferably 100 mm or less, more preferably 80 mm or less, and preferably 40 mm or more and 100 mm or less, more preferably. It is 45 mm or more and 80 mm or less.

In the diaper 1 of the present embodiment, the second nonwoven fabric 13 has elasticity in the entire area thereof, and the second nonwoven fabric 13 which is at least one of the first nonwoven fabric 12 and the second nonwoven fabric 13 in the overlapping area 14 It has elasticity in an area larger than the size of the sensor 8.
With such a configuration, the portion where the sensor 8 is arranged is provided with followability to various postures and movements of the wearer, and it is possible to prevent the sensor 8 from being displaced from the mounting position to be mounted.

The same effect is obtained when the first nonwoven fabric 12 has elasticity in an area larger than the size of the sensor 8 instead of the second nonwoven fabric 13, but the second nonwoven fabric 13 located outside the sensor pocket 15. It is preferable that the sensor 8 has elasticity from the viewpoint of ease of insertion into the pocket of the sensor 8.

In the overlapping region 14 of the diaper 1 of the present embodiment, as shown in FIGS. 3 and 5, at least the sensor pocket 15 is sandwiched between the fixed regions F1 to F3 located in three directions around the sensor pocket 15. The fixed regions F1 and F2 located on both sides extend beyond the end of the overlapping region 14. As a result, the sensor 8 is arranged at a specific position having a narrower range, so that the measurement system of the physical properties of the absorbent article by the sensor 8 and the detection accuracy of the change of the absorbent article are improved.
From the same viewpoint, in the plan view of the overlapping region 14, the area of the sensor pocket 15 is preferably half or less, that is, 50% or less, and more preferably 40% or less of the area of the overlapping region 14. Further, the area of the sensor pocket 15 is preferably 5% or more, more preferably 10% or more of the area of the overlapping region 14. The overlapping region 14 shown in FIG. 3 continuously exists in the entire lateral direction Y of the exterior body 7 in the inseam C, but does not have to reach both ends of the lateral Y of the inseam C. ..

The sensor 8 is preferably attached to a region overlapping the urination site of the diaper from the viewpoint of accurately obtaining information on changes due to urination. The urination site of the diaper is a site where the absorber 4 is present inside. From the viewpoint of more accurately detecting changes in temperature, humidity, etc. caused by urination, it is preferable that the sensor 8 is attached to the portion of the inseam C where the absorber 4 is present, and the sensor 8 is laterally Y in the inseam C. It is preferable to attach it to the central area of.
In the pants-type diaper 10, the inseam C is an area located between the left and right leg openings, and in the non-pants-type diaper, the inseam C is a vertically expanded diaper that is spread out in a plane. It is the central three regions when the total length of the direction X is divided into five equal parts and divided into five regions.
Regarding the diaper or the inseam, the central region D in the lateral direction Y extends the diaper in the vertical direction X in parallel 2 so as to divide the length of the inseam C in the lateral direction Y into three equal parts, as shown in FIG. This is the central region D when divided into three by a straight line (see FIG. 12).

From the viewpoint of arranging the sensor 8 at a position where information on changes due to urination can be accurately obtained, it is preferable that the sensor pocket 15 is formed at a portion overlapping with the absorber 4, that is, at the above-mentioned urination site.

In the diaper 1 of the present embodiment, as shown in FIGS. 1 and 2, a waist elastic member 91 for forming waist gathers is arranged on the peripheral edge of the waist opening 17, and the waist elastic member 91 is arranged on the peripheral edge of the leg opening 18. A leg elastic member 92 for forming leg gathers is arranged.
In the diaper 1 of the present embodiment, as shown in FIG. 6, an intermediate sheet 19 having substantially the same shape as the base sheet 11 is arranged between the leak-proof sheet 3 and the base sheet 11. The waist elastic member 91 and the leg elastic member 92 may be fixed between the base sheet 11 and the intermediate sheet 19 in an extended state by an adhesive or the like arranged between the sheets 11 and 19. Further, the waist elastic member 91 and the leg elastic member 92 have an adhesive or the like arranged between the base sheet 11 and the first nonwoven fabric 12 or the second nonwoven fabric 13 without the presence of the intermediate sheet 19. It may be fixed in an extended state. Various known sheet materials can be used as the base sheet 11 and the intermediate sheet 19, but a non-woven fabric is preferable, and for example, the non-woven fabric 12 and the second non-woven fabric 13 which have low elasticity are used. The same stretchable non-woven fabric can be used.

Next, the second to fourth embodiments of the absorbent article of this invention will be described.
The second to fourth embodiments will be mainly described in terms of differences from the first embodiment, and the same reference numerals will be given to the same members and the description thereof will be omitted. The description of the first embodiment can be appropriately applied to the points not particularly described with respect to the embodiments other than the first embodiment, including the preferable configuration.

As shown in FIG. 7, in the diaper 1A of the second embodiment, the first non-woven fabric 12 made of a non-stretchable non-woven fabric is hung from the dorsal side B to a part of the inseam C, and is stretchable. A second nonwoven fabric 13 made of a nonwoven fabric is arranged so as to hang from the ventral side A to a part of the inseam C. Then, in the inseam C, the end region on the dorsal side B side of the second nonwoven fabric 13 overlaps with the non-skin facing surface side of the end region 12a on the ventral side A side of the first nonwoven fabric 12. The overlapping portion between the first nonwoven fabric 12 and the second nonwoven fabric 13 is the overlapping region 14.
A sensor pocket 15 is formed in the central portion of the overlapping region 14 in the lateral direction Y. The configuration and shape of the fixed areas F1 to F3 surrounding the sensor pocket 15 and its surroundings in the three directions are such that the position of the pocket insertion port 15a and the position of the fixed area F3 located at the back of the sensor pocket 15 in the insertion direction are the vertical directions X. Is upside down. That is, as shown in FIG. 7, in the plan view of the overlapping region 14, the first non-woven fabric 12 and the second non-woven fabric 13 are viewed from the central portion of the sensor pocket 15 in two left-right directions and the ventral side A direction. It has fixed regions F1 to F3 joined to each other, and a sensor insertion port 15a is formed in the dorsal side B direction when viewed from the central portion of the sensor pocket 15 which is the remaining one direction. Other than this point, it is the same as that in the first embodiment.

Even in the overlapping region 14 of the diaper 1A of the second embodiment, the elasticity of the second nonwoven fabric 13 located outside the sensor pocket 15 in the thickness direction of the diaper is the elasticity of the first nonwoven fabric 12 located inside the sensor pocket 15. It is more elastic than.
Similar to the diaper 1 of the first embodiment, the diaper 1A of the second embodiment also has the sensor pocket 15, and the first nonwoven fabric 12 and the second nonwoven fabric 13 cover the entire area where the sensor pocket 15 is formed. Since the elasticity of the diaper is different, the same effect as that of the diaper 1 of the first embodiment is obtained.

As shown in FIGS. 8 and 9, in the diaper 1B of the third embodiment, the first nonwoven fabric 12 made of non-stretchable nonwoven fabric is arranged on one side (left side in FIG. 9) in the lateral direction Y. The second nonwoven fabric 13 made of the stretchable nonwoven fabric is arranged on the other side (right side in FIG. 9) in the lateral direction Y. The end region on the lateral center side of the second nonwoven fabric 13 overlaps with the non-skin facing surface side of the end region on the lateral center side of the first nonwoven fabric 12, and the first nonwoven fabric 12 and the second nonwoven fabric. The overlapping portion with 13 is the overlapping region 14.
Then, a sensor pocket 15 is formed in a portion of the inseam C near the ventral side A. As shown in FIG. 9, as the fixed regions F1 to F3 surrounding the sensor pocket 15 in three directions, the fixed regions F1 and F2 located above and below the sensor pocket 15 and the lateral direction Y of the overlapping region 14 It has a fixed region F3 formed at one end, and a sensor insertion port 15a is formed at the other end of the overlapping region 14 in the lateral direction Y.
It is used as the second nonwoven fabric 13 in the diaper 1B of the third embodiment from the viewpoint of making it easier to insert the sensor 8 and holding the sensor 8 more stably in a state where the sensor 8 is pressurized as described later. It is preferable that the stretchable nonwoven fabric also has elasticity at least in the vertical direction X, which is a direction parallel to the extending direction of the sensor insertion port 15a.
Even in the overlapping region 14 of the diaper 1B of the third embodiment, the elasticity of the second nonwoven fabric 13 located outside the sensor pocket 15 in the thickness direction of the diaper is the elasticity of the first nonwoven fabric 12 located inside the sensor pocket 15. It is more elastic than.

Similar to the diaper 1 of the first embodiment, the diaper 1B of the third embodiment also has the sensor pocket 15, and the first nonwoven fabric 12 and the second nonwoven fabric 13 cover the entire area where the sensor pocket 15 is formed. Since the elasticity is different from that of the diaper 1, the same effect as that of the diaper 1 of the first embodiment is obtained. In the examples shown in FIGS. 8 and 9, the first nonwoven fabric 12 and the second nonwoven fabric 13 are continuously arranged on the ventral side A, the inseam C, and the dorsal side B, respectively, and overlap regions. 14 is also continuously formed on the ventral side A, the inseam C and the dorsal side B, but instead, the first nonwoven fabric 12 and the second nonwoven fabric 13 forming the overlapping region 14 are formed on the crotch C. It may be distributed only to.

In the diaper 1 of the first embodiment, as shown in FIG. 3, since the sensor insertion port 15a in the sensor pocket 15 is formed on the ventral side A side in the overlapping region 14, the insertion direction of the sensor 8 is worn. The direction is from the upper side to the lower side of the person, and it is easy for the wearer or the person who measures the characteristics of the diaper such as temperature and humidity by the sensor to insert the sensor 8, and many of them are standing or sitting. In the state, the sensor 8 is less likely to fall due to gravity.

In the diaper 1A of the second embodiment, as shown in FIG. 7, since the sensor insertion port 15a in the sensor pocket 15 is formed on the dorsal side B side in the overlapping region 14, the wearer can use the sensor pocket 15. It is difficult to visually recognize the sensor 8 arranged in.
Therefore, the presence of the sensor 8 can suppress the wearer from being stressed, or prevent the wearer from removing the sensor 8 while monitoring urination or the like by the sensor. can.

In the diaper 1B of the third embodiment, as shown in FIGS. 8 and 9, the sensor insertion port 15a in the sensor pocket 15 is formed on one end side of the lateral direction Y in the overlapping region 14, so that the wearer can use the diaper 1B. It is easy to insert and remove the sensor 8 into and out of the sensor pocket 15 when lying down, especially when lying down or lying down.

In the first to third embodiments described above, in the overlapping region 14, the sensor pocket 15 in the overlapping region 14 is formed by using the stretchable nonwoven fabric as the second nonwoven fabric 13 arranged on the outside in the thickness direction of the diaper. The elasticity of the first nonwoven fabric 12 and the second nonwoven fabric 13 are made to be different from each other in the entire area, but instead, as in the diaper 1C of the fourth embodiment shown in FIGS. 10 and 11. In the second non-woven fabric 13 made of non-stretchable non-woven fabric, an elastic member 15d having a length equal to or longer than the length of the sensor 8 is arranged in the region 15b on the insertion port 15a side of the sensor 8 of the sensor pocket 15 in the overlapping region 14. The stretchability of the first nonwoven fabric 12 and the second nonwoven fabric 13 may be different in a part of the region where the sensor pocket 15 is formed.
Similar to the diaper 1 of the first embodiment, the diaper adopting such a configuration also has the sensor pocket 15 and the sensor 8 does not come into direct contact with the excrement, so that from the viewpoint of hygiene and failure prevention. , The sensor 8 can be easily reused. Further, since the elasticity of the first nonwoven fabric 12 and the second nonwoven fabric 13 are different in a part of the region where the sensor pocket 15 is formed, the sensor 8 inserted in the sensor pocket 15 is the first nonwoven fabric 12 and the second nonwoven fabric. It is stably held between 13 and 13. Further, by providing the sensor pocket 15 at a preferable portion according to the physical characteristics measured by the sensor 8, the sensor 8 can be easily arranged at an appropriate position. FIG. 10 shows an example in which the sensor insertion port 15a is provided at the end of the overlapping region 14 on the ventral side A side, but the sensor pockets 15 overlap as in the second embodiment and the third embodiment. It is also possible to have the sensor insertion port 15a at the end of the region 14 on the dorsal side B side or the end in the lateral direction of the diaper.

The elastic member 15d preferably has a length L2 along the edge of the overlapping region 14 in which the sensor insertion port 15a is formed, with respect to a length L8 in the same direction of the sensor 8 arranged in the sensor pocket 15. It is more than 100%, more preferably 105% or more, still more preferably 110% or more. There is no particular upper limit, and it may be the same as the total width or the total length of the diaper.
Further, in the elastic member 15d, the length L2 along the edge of the overlapping region 14 in which the sensor insertion port 15a is formed is preferably 100% or more, more preferably 105, of the length L3 in the same direction of the insertion port 15a. % Or more, preferably 150% or less, more preferably 140% or less, preferably 100% or more and 150% or less, and more preferably 105% or more and 140% or less.
The elastic member 15d may be arranged on the first nonwoven fabric 12 located inside the sensor pocket 15 in the thickness direction of the diaper, but the sensor is arranged on the second nonwoven fabric 13 outside the sensor pocket 15. It is preferable from the viewpoint of ease of insertion into the pocket of 8.
The elastic member 15d includes, for example, synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, elastic polymer such as natural rubber, EVA, elastic polyolefin, and polyurethane, and thread-like (thread rubber, etc.) and string-like (flat). Rubber, etc.), those formed in the form of a film, etc. can be preferably used. The cross-sectional shape of the elastic member 15d may be a rectangle, a square, a circle, an ellipse, a polygon, or the like.

From the viewpoint of arranging the sensor 8 at an appropriate site so that information on changes due to urination can be accurately obtained, it is also preferable to arrange a sensor fixing material for fixing the sensor 8 in the sensor pocket 15. For example, one of the male and female members of the mechanical surface fastener is fixed to the adhesive layer formed by applying an adhesive to the surface of the first nonwoven fabric 12 facing the sensor 8, and the other. Can also be provided on the surface of the first nonwoven fabric 12 facing the sensor 8.

A sensor 8 is arranged in the sensor pocket 15 of the diaper of each of the above-described embodiments, and the sensor 8 is used to change the diaper due to excretion of the wearer, for example, a change in humidity due to urination, a change in temperature, and the like. Detecting the generation of odor and the change in impedance is an example of a preferable embodiment of the change detection method of the present invention, and the above-mentioned preferable configuration and description regarding the diaper of each embodiment are appropriate for the change detection method of the present invention. Applicable.

As shown in FIG. 12, the absorbent article of the present invention has an overlapping region 14 in which the entire second nonwoven fabric 13 is superposed on a part of the first nonwoven fabric 12 as a constituent material of the outermost surface of the absorbent article. It may be a thing. The disposable diaper 1D of the fourth embodiment shown in FIG. 12 has fixed regions F1 to F3 to which the first nonwoven fabric 12 and the second nonwoven fabric 13 are joined only at the three-direction ends of the overlapping region 14. A sensor insertion slot 15a is provided at the remaining unidirectional end. Even in such a case, by using an elastic non-woven fabric as the second non-woven fabric 13 or arranging an elastic member in the region on the insertion port 15a side, the diaper in which the effect of the present invention can be exhibited can be obtained.
FIG. 12 shows an example in which the sensor insertion port 15a is provided at the end of the overlapping region 14 on the ventral side A side, but the sensor pockets 15 overlap as in the second embodiment and the third embodiment. It is also possible to have the sensor insertion port 15a at the end of the region 14 on the dorsal side B side or the end in the lateral direction of the diaper.

Further, the absorbent article of the present invention may be provided with an indicator 9 for informing urination by a change in color, as in the diaper shown in FIG. Preferably, the indicator 9 extends in the longitudinal direction X of the absorbent article corresponding to the wearer's anterior-posterior direction, and the sensor pocket 15 is preferably formed at a portion overlapping the indicator 9. As the indicator 9, it is preferable to dispose various known compositions whose color changes upon contact with urine between the absorber 4 and the leak-proof sheet 3.
Since the indicator 9 usually changes its color when it comes into contact with urine, it is arranged in a portion where it is likely to come into contact with urine, for example, a central region D in the width direction. Therefore, by providing the sensor pocket 15 at a portion overlapping with the indicator 9, it becomes easy to arrange the sensor 8 at a portion suitable for detecting a change due to urination.

It is also preferable that the second nonwoven fabric 13 in the overlapping region 14 in the absorbent article of the present invention is provided with a display indicating the position of the sensor pocket 15. The display may be characters, figures, symbols or a combination thereof, and the method for providing the display is preferably printing, but is not particularly limited.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment.
For example, the sensor 8 may have a temperature or humidity measuring function and a measured data recording function, or may have a temperature or humidity measuring function and a communication function, and the measured temperature or the like data. May be transmitted wirelessly to an external device such as Wi-Fi (registered trademark), and the external device may record data or analyze the data. Examples of the external device include a mobile terminal such as a smartphone in which necessary applications and programs are installed, a dedicated terminal, a personal computer of a desktop or a laptop, and the like.
The shape of the sensor 8 can be appropriately determined, and for example, the plan view shape may be a polygon such as an ellipse, a triangle, or a quadrangle, a heart shape of a playing card, or the like, instead of a circular shape. Further, the sensor 8 preferably has a flat shape having a height smaller than the diameter when viewed in a plan view or the diameter equivalent to a circle, but may have a non-flat shape.

The following absorbent articles or change detection methods are further disclosed with respect to the above-described embodiment of the present invention.
<1>
An absorbent article comprising a surface sheet located on the skin-facing surface side, an outer sheet located on the non-skin-facing surface side, and an absorber disposed between the surface sheet and the outer sheet.
The outer sheet has a first nonwoven fabric and a second nonwoven fabric arranged in a state where a part or all of the first nonwoven fabric is overlapped on the non-skin facing surface side as a constituent material of the outermost surface of the absorbent article. ,
In a part of the overlapping region where the first nonwoven fabric and the second nonwoven fabric overlap, the first nonwoven fabric and the second nonwoven fabric are not bonded, and a sensor for detecting changes occurring in the absorbent article is arranged inside. Possible sensor pockets are formed,
The overlapping region has a fixed region in which the first nonwoven fabric and the second nonwoven fabric are joined in three directions around the sensor pocket, and an insertion port for the sensor is formed in the remaining one direction.
An absorbent article in which the stretchability of the first nonwoven fabric and the second nonwoven fabric are different from each other in at least a part of the region where the sensor pocket is formed in the overlapping region.

<2>
The absorbent article according to <1>, wherein the sensor pocket has a size capable of arranging the entire sensor inside.
<3>
The absorbent article according to <1> or <2>, wherein at least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has elasticity in an area equal to or larger than the size of the sensor.
<4>
The absorption according to any one of <1> to <3>, wherein the elasticity of the second nonwoven fabric is higher than that of the first nonwoven fabric in the entire area where the sensor pocket is formed in the overlapping region. Sex goods.
<5>
The insertion slot extends and opens in a direction orthogonal to the direction in which the sensor is inserted into the sensor pocket through the insertion slot.
The absorbent article according to any one of <1> to <4>, wherein at least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has elasticity in the extending direction of the insertion slot. ..
<6>
At least one of the first non-woven fabric and the second non-woven fabric is a stretchable non-woven fabric,
Any of the above <1> to <5>, in which a large number of elastic filaments in which the stretchable nonwoven fabrics are arranged so as to extend in one direction without intersecting each other are integrated into an stretchable fiber layer. The absorbent article according to 1.
<7>
The absorbent article according to <6> above, wherein the first nonwoven fabric is a non-stretchable nonwoven fabric and the second nonwoven fabric is a stretchable nonwoven fabric.
<8>
It has a vertical direction that is a direction from the front side to the rear side of the wearer at the time of wearing, and a horizontal direction that is orthogonal to the vertical direction.
The absorbent article according to <7>, wherein the non-stretchable nonwoven fabric has a maximum lateral elongation of less than 50%.
<9>
At least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region is provided with an elastic member having a length equal to or longer than the length of the sensor at the insertion port side portion in the sensor pocket. The absorbent article according to any one of <8>.
<10>
The elastic member preferably has a length along the edge of the overlapping region where the insertion port of the sensor is formed, preferably 100% with respect to a length in the same direction of the sensor arranged in the sensor pocket. The absorbent article according to <9> above, which is super, more preferably 105% or more, still more preferably 110% or more.

<11>
The length of the elastic member along the edge of the overlapping region where the insertion port of the sensor is formed is preferably 100% or more, more preferably 105% of the length in the same direction of the insertion port of the sensor. The absorbent article according to the above <9> or <10>, which is more preferably 150% or less, more preferably 140% or less.
<12>
The absorbent article according to any one of <9> to <11>, wherein the elastic member is arranged on the second nonwoven fabric.
<13>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
The absorbent article according to any one of <1> to <12>, wherein the insertion port of the sensor in the sensor pocket is formed on the ventral side of the overlapping region.
<14>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
In the plan view of the overlapping region, the three directions are the left and right two directions and the dorsal side direction when viewed from the central portion of the sensor pocket, and the remaining one direction is viewed from the central portion of the sensor pocket. The absorbent article according to <13>, which is in the ventral direction.
<15>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
The first nonwoven fabric has a portion arranged on the ventral side and a portion arranged on the inseam, but does not have a portion arranged on the dorsal side.
The second nonwoven fabric has a portion arranged on the dorsal side and a portion arranged on the inseam, but does not have a portion arranged on the ventral side, said <13> or <14. > The absorbent article described in.
<16>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
The absorbent article according to any one of <1> to <12>, wherein the insertion portion of the sensor in the sensor pocket is formed on the dorsal side of the overlapping region.
<17>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
In the plan view of the overlapping region, the three directions are the left and right two directions and the ventral side direction when viewed from the central portion of the sensor pocket, and the remaining one direction is viewed from the central portion of the sensor pocket. The absorbent article according to <16>, which is in the dorsal direction.
<18>
It has a vertical direction that is a direction from the front side to the rear side of the wearer at the time of wearing, and a horizontal direction that is orthogonal to the vertical direction.
The first nonwoven fabric has a portion arranged on one side in the lateral direction, but does not have a portion arranged on the other side.
The second nonwoven fabric has a portion arranged on the other side in the lateral direction, but does not have a portion arranged on one side.
The end region on the lateral center side of the second nonwoven fabric overlaps the non-skin facing surface side of the end region on the lateral center side of the first nonwoven fabric, and the first nonwoven fabric and the second nonwoven fabric The absorbent article according to any one of <1> to <12>, wherein the overlapping portion thereof is the overlapping region.
<19>
In the fixed area in the three directions in the overlapping area, at least the fixed areas located on both sides of the sensor pocket extend beyond the end portion of the overlapping area, and in a plan view of the overlapping area. The absorbent article according to any one of <1> to <18>, wherein the area of the sensor pocket is less than half the area of the overlapping area.
<20>
In the plan view of the overlapping region, the area of the sensor pocket is preferably 50% or less, more preferably 40% or less, and more preferably 5% or more of the area of the overlapping region. % Or more, more preferably, the absorbent article according to any one of <1> to <19>.

<21>
The sensor pocket has a maximum depth of preferably 40 mm or more, more preferably 45 mm or more, and preferably 100 mm or less, more preferably 80 mm or less, any one of the above <1> to <20>. Absorbent article described in.
<22>
It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
It has a vertical direction that is a direction from the front side to the rear side of the wearer at the time of wearing, and a horizontal direction that is orthogonal to the vertical direction.
The sensor is preferably attached to a portion of the inseam where the absorber is present inside the absorbent article, and is preferably attached to the lateral central region of the inseam, said <1> to <. 21> The absorbent article according to any one of.
<23>
The absorbent article according to any one of <1> to <22>, wherein the sensor pocket is formed at a portion overlapping the absorber.
<24>
The absorbent article comprises an indicator that signals urination by a change in color, the indicator extending in the longitudinal direction of the absorbent article corresponding to the wearer's anterior-posterior direction, and the sensor pocket is the indicator. The absorbent article according to any one of <1> to <23>, which is formed at a portion overlapping with the above.
<25>
The absorbent article according to any one of <1> to <24>, wherein a sensor fixing material for fixing the sensor is arranged inside the sensor pocket.
<26>
The absorbent article according to any one of <1> to <25>, wherein the second nonwoven fabric in the overlapping region is provided with a display indicating the position of the sensor pocket.
<27>
The sensor is placed in the sensor pocket of the absorbent article according to any one of <1> to <26>, and the sensor is used to detect changes occurring in the absorbent article due to excretion of the wearer. A method for detecting changes in absorbent articles.

1,1A-1D diapers (absorbent articles)
8 Sensor 12 1st non-woven fabric 13 2nd non-woven fabric 14 Overlapping area 15 Sensor pocket 2 Surface sheet 3 Leakage-proof sheet 4 Absorber 10 Outer sheet

Claims (12)

An absorbent article comprising a surface sheet located on the skin-facing surface side, an outer sheet located on the non-skin-facing surface side, and an absorber disposed between the surface sheet and the outer sheet.
The outer sheet has a first nonwoven fabric and a second nonwoven fabric arranged in a state where a part or all of the first nonwoven fabric is overlapped on the non-skin facing surface side as a constituent material of the outermost surface of the absorbent article. ,
In a part of the overlapping region where the first nonwoven fabric and the second nonwoven fabric overlap, the first nonwoven fabric and the second nonwoven fabric are not bonded, and a sensor for detecting changes occurring in the absorbent article is arranged inside. Possible sensor pockets are formed,
The overlapping region has a fixed region in which the first nonwoven fabric and the second nonwoven fabric are joined in three directions around the sensor pocket, and an insertion port for the sensor is formed in the remaining one direction.
An absorbent article in which the stretchability of the first nonwoven fabric and the second nonwoven fabric are different from each other in at least a part of the region where the sensor pocket is formed in the overlapping region. The absorbent article according to claim 1, wherein the sensor pocket has a size capable of arranging the entire sensor inside. The absorbent article according to claim 1 or 2, wherein at least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has elasticity in an area equal to or larger than the size of the sensor. In the fixed area in the three directions in the overlapping area, at least the fixed areas located on both sides of the sensor pocket extend beyond the end portion of the overlapping area, and in a plan view of the overlapping area. The absorbent article according to any one of claims 1 to 3, wherein the area of the sensor pocket is less than half the area of the overlapping area. The insertion slot extends and opens in a direction orthogonal to the direction in which the sensor is inserted into the sensor pocket through the insertion slot.
The absorbent article according to any one of claims 1 to 4, wherein at least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has elasticity in the extending direction of the insertion slot. Claims 1 to 5 wherein at least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region includes an elastic member having a length equal to or longer than the length of the sensor at a portion of the sensor pocket on the insertion port side. The absorbent article according to any one of the above items. It has a ventral portion arranged on the ventral side of the wearer at the time of wearing, a dorsal portion arranged on the dorsal side of the wearer, and a crotch portion located between the ventral portion and the dorsal portion. And
The absorbent article according to any one of claims 1 to 6, wherein the insertion port of the sensor in the sensor pocket is formed on the ventral side of the overlapping region. The absorbent article according to any one of claims 1 to 7, wherein the sensor pocket is formed at a portion overlapping the absorber. The absorbent article comprises an indicator that signals urination by a change in color, the indicator extending in the longitudinal direction of the absorbent article corresponding to the wearer's anterior-posterior direction, and the sensor pocket is the indicator. The absorbent article according to any one of claims 1 to 8, which is formed in a portion overlapping with the above. The absorbent article according to any one of claims 1 to 9, wherein a sensor fixing material for fixing the sensor is arranged inside the sensor pocket. The absorbent article according to any one of claims 1 to 10, wherein the second nonwoven fabric in the overlapping region is provided with a display indicating the position of the sensor pocket. The sensor is placed in the sensor pocket of the absorbent article according to any one of claims 1 to 11, and the sensor is used to detect a change in the absorbent article due to excretion of the wearer. A method for detecting changes in absorbent articles.

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