JP2022106452A - Absorbent article - Google Patents

Abstract

To provide a technique for an absorbent article having a sensor attached thereto, reducing a risk of excrement to exude from the same while increasing sensitivity of the sensor.SOLUTION: An outer layer body 3 forms an outer surface of an absorbent article 1A at a crotch part B, and a non-skin-facing side of the outer layer body 3 is partly provided with a sensor support area 10 for attaching a sensor 20 thereto, so that the sensor support area includes an area overlapping an absorber 4 in plan view. The sensor 20 can detect a temperature of the portion overlapping the sensor 20 in plan view in the absorbent article 1. The outer layer body 3 is different in heat conductivity between a first portion 31 provided with the sensor support area 10 and a second portion 32 not provided with the sensor support area 10 at the crotch part B. The first portion 31 is higher in the heat conductivity than the second portion 32.SELECTED DRAWING: Figure 1

Description

The present invention relates to an absorbent article to which a sensor is attached for the purpose of detecting excretion of the wearer.

In general, absorbent articles such as disposable diapers include an absorber that absorbs and retains excrement such as urine, feces, and menstrual blood, and an inner layer such as a surface sheet that is arranged closer to the wearer's skin than the absorber. It is composed of a body and an outer layer body such as a back surface sheet arranged on a side farther from the wearer's skin than the absorber. Patent Documents 1 and 2 describe improved techniques for outer layers.
Specifically, Patent Document 1 describes a deployable disposable diaper in which a transparent portion is formed on a part of a back sheet as a deployable disposable diaper that allows the absorption state of excrement to be visually confirmed from the outside while being worn. .. The back sheet on which the transparent portion is formed is partially embossed on a microporous sheet produced from a melt mixture of a thermoplastic resin and a compound that phase-separates below the crystallization temperature of the thermoplastic resin. It is manufactured by applying, and the transparent portion is an embossed portion.
Further, Patent Document 2 describes an absorbent article having a heat-retaining effect and in which the temperature of a wet portion is less likely to decrease due to urination, which employs a back sheet having a metal layer. According to the absorbent article described in Patent Document 2, it is said that the temperature of excrement absorbed and held by the absorber can be maintained by utilizing the body heat reflected by the metal layer.

Further, conventionally, a sensor for detecting temperature and humidity is attached to an absorbent article such as a disposable diaper, and the wearer uses the information on the temperature and humidity inside the absorbent article being worn provided by the sensor. Techniques for detecting the presence or absence of excretion are known. For example, Patent Document 3 describes a diaper wetness notification device using such a technique.

Japanese Unexamined Patent Publication No. 10-85257 Japanese Unexamined Patent Publication No. 2014-180461 Japanese Unexamined Patent Publication No. 9-220259

In order to attach a sensor that detects temperature and humidity to an absorbent article and accurately detect the presence or absence of excretion by the wearer, it is indispensable to increase the sensitivity of the sensor. Then, in order to realize high sensitivity of the sensor, it is necessary not only to improve the detection performance of the sensor itself, but also to devise a device to increase the detection sensitivity of the sensor in the absorbent article to which the sensor is attached. As a device on the side of such an absorbent article, for example, when a temperature sensor is attached to an outer layer body forming the outer surface of the absorbent article, heat generated by excrement absorbed and held by the absorber is transmitted through the outer layer body. In order to quickly transmit the heat to the temperature sensor, it is conceivable to reduce the thickness of the outer layer to increase the thermal conductivity.

However, in the absorbent article, the outer layer body, which is a member arranged on the side farther from the wearer's skin than the absorber, plays a role of preventing the excrement absorbed and held by the absorber from leaking to the outside. If the thickness of the outer layer body, which is expected to have such a leak-proof function, is uniformly reduced, the leak-proof function of the outer layer body is impaired, and excrement permeates the outer layer body in the thickness direction and stains to the outside. There is concern that it will be released. Then, the exudation of excrement through such an outer layer body may cause inconvenience such as stains on clothes worn on top of the absorbent article.

An object of the present invention is to provide a technique capable of realizing high sensitivity of a sensor while reducing the risk of exudation of excrement in an absorbent article to which a sensor is attached.

The present invention has a vertical direction extending from the ventral side of the wearer to the dorsal side via the crotch portion and a lateral direction orthogonal to the vertical direction, and the crotch portion arranged in the crotch portion and the crotch portion. An absorber that is divided into a ventral portion that is arranged on the ventral side of the wearer and a dorsal portion that is arranged on the dorsal side of the wearer rather than the inseam, and at least in the inseam that absorbs and retains body fluid. It is an absorbent article including an outer layer body arranged on a side farther from the wearer's skin than the absorbent body.
In one embodiment of the absorbent article of the present invention, a sensor-corresponding region to which a sensor can be attached is formed on a part of the non-skin facing surface of the outer layer body forming the outer surface of the inseam in a plan view with the absorber. The sensor is provided so as to include an overlapping region, and the sensor includes a sensor capable of detecting the temperature of a portion of the absorbent article that overlaps the sensor in a plan view.
In one embodiment of the absorbent article of the present invention, in the outer layer body of the inseam, the first portion provided with the sensor-corresponding region on the non-skin facing surface has the sensor-corresponding region on the non-skin facing surface. The thermal conductivity is higher than that of the second portion in which is not provided.
Other features, effects and embodiments of the present invention are described below.

According to the present invention, there is provided an absorbent article capable of realizing high sensitivity of a sensor while reducing the risk of exudation of excrement.

FIG. 1 is a schematic perspective view of a deployable disposable diaper according to an embodiment of the absorbent article of the present invention. FIG. 2 is a schematic development plan view of the skin-facing surface side (inner layer body side) in the unfolded and stretched state of the diaper shown in FIG. FIG. 3 is a cross-sectional view taken along the thickness direction along the line II of FIG. 2, and is a schematic cross-sectional view of the inseam of the diaper shown in FIG. FIG. 4 is a schematic perspective view of a pants-type disposable diaper according to another embodiment of the absorbent article of the present invention. FIG. 5 is a development plan view schematically showing the diaper shown in FIG. 4 in the unfolded and stretched state with the skin facing surface side (inner layer body side) partially broken. FIG. 6 is a cross-sectional view taken along the thickness direction in line II-II of FIG. 5, and is a schematic cross-sectional view of the inseam of the diaper shown in FIG. 7 (a) to 7 (f) are schematic plan views of an embodiment of the absorbent article of the present invention in an expanded and extended state, respectively, and are diagrams showing an arrangement pattern of a sensor-corresponding region. be. 8 (a) to 8 (g) are schematic cross-sectional views taken along the lateral and thickness directions of the inseam of one embodiment of the absorbent article of the present invention, respectively.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. The drawings are basically schematic, and the ratio of each dimension may differ from the actual one.

As a typical embodiment of the absorbent article of the present invention, a so-called deployable absorbent article in which the waist opening and the leg opening are not formed in advance and are formed when worn, and the waist opening and the leg opening are included. Examples thereof include preformed pants-type absorbent articles. Hereinafter, first, the basic configuration of both absorbent articles will be described.

1 to 3 show a deployable disposable diaper 1A, which is an embodiment of the absorbent article of the present invention. The diaper 1A has a vertical direction X corresponding to the front-back direction of the wearer, that is, a direction extending from the ventral side to the dorsal side via the crotch portion, and a horizontal direction Y orthogonal to the vertical direction X. The diaper 1A is arranged in the crotch part of the wearer, and includes the inseam B including the part facing the excretion part (not shown) facing the excretion part such as the penis of the wearer, and the ventral side of the wearer rather than the crotch part B. It is divided into three parts: a ventral part A arranged on the (anterior side) and a dorsal part C arranged on the back side (rear side) of the wearer rather than the inseam B. The diaper 1A includes, at least in the inseam B, an absorber 4 that absorbs and retains body fluids, and an outer layer body 3 that is arranged on a side farther from the wearer's skin than the absorber 4.

In the present embodiment, the diaper 1A is formed symmetrically on one side and the other side with the lateral center line CLy in the unfolded and extended state as shown in FIG.
The ventral part A is a part of the front body F of the diaper 1A, and the dorsal part C is a part of the back body R of the diaper 1A. The inseam B straddles the vertical center line CLx in the vertical direction X, and exists from the front body F to the back body R. The inseam B typically includes a region where leg openings LS, LS, which are recesses for forming leg openings LH, LH, are formed. The leg edge portion LS is a part of both side edge portions along the vertical direction X of the outer layer body 3.
In the present invention, the ventral portion A, the inseam B, and the dorsal portion C can be each region when the unfolded and extended diaper 1A is divided into three equal parts in the vertical direction X.

The horizontal center line CLy is a virtual straight line that bisects the unfolded and extended diaper 1A in the horizontal direction Y and extends in the vertical direction X. The vertical center line CLx is a virtual straight line that bisects the unfolded and extended diaper 1A in the vertical direction X and extends in the horizontal direction Y.
The "expanded and stretched state" means that the absorbent article is expanded in a plane to be in the expanded state, and the elastic members of each part of the absorbent article in the expanded state are extended to eliminate the design dimension (the influence of the elastic member is completely eliminated). It refers to the state in which it is expanded to the same size as when it is expanded in a flat state.

In the present embodiment, as shown in FIG. 3, the diaper 1A has a liquid-permeable inner layer 2 that forms a skin-facing surface, a liquid-impermeable outer layer 3 that forms a non-skin-facing surface, and these inner layers 2. It is provided with an absorber 4 interposed between the outer layer 3 and the outer layer 3, and these members 2, 3 and 4 constitute the absorbent main body 5. Each member constituting the absorbent main body 5 is integrated by a joining means such as an adhesive or fusion. The inner layer 2 covers the entire surface of the absorber 4 facing the skin, and the outer layer 3 covers the entire non-skin facing surface of the absorber 4. The inner layer 2 and the outer layer 3 extend outward from both ends of the absorber 4 in the vertical direction X, respectively. The outer layer 3 also extends outward from both side edges (both ends in the horizontal direction Y) of the absorber 4 along the vertical direction X, and forms the outer shape of the unfolded diaper 1A as shown in FIG. The peripheral edge of the outer layer 3 forms contour lines of the ventral portion A, the inseam B, and the dorsal portion C, respectively.

In the present specification, the "skin facing surface" is a surface that is directed toward the wearer's skin when the absorbent article is worn when focusing on the absorbent article or its constituent members (for example, an absorber), and is "non-skin". The "opposing surface" is a surface that faces the side opposite to the wearer's skin when the absorbent article is worn. That is, the skin-facing surface is the surface relatively close to the wearer's skin, and the non-skin-facing surface is the surface relatively far from the wearer's skin. In addition, "when worn" and "wearing state" refer to a state in which the absorbent article is worn while maintaining an appropriate wearing position.

The inner layer body 2 may have a single-layer structure or a laminated structure in which a plurality of layers are laminated. The inner layer body 2 may have liquid permeability as a whole layer, and an aqueous liquid such as a body fluid may be able to permeate the inner layer body 2 in the thickness direction. For example, a liquid impermeable sheet in a part of the laminated structure. May include. The inner layer 2 typically includes a liquid-permeable sheet called a surface sheet or the like, and if necessary, a liquid-permeable sheet called a sublayer, a second sheet or the like is provided on the non-skin facing surface side of the surface sheet. Further included. As the inner layer 2, any absorbent article of this type that can be used as a surface sheet, a sublayer, or the like can be used without particular limitation, provided that it does not deviate from the gist of the present invention. A film or the like can be used.

The outer layer body 3 may have a single-layer structure or a laminated structure in which a plurality of layers are laminated. In the present embodiment, as shown in FIG. 3, the outer layer 3 of the diaper 1A includes a first outer layer sheet 3a and a second outer layer sheet 3b in the order closer to the absorber 4, and has a two-layer structure. The second outer layer sheet 3b forms a non-skin facing surface (outer surface of the diaper 1A) of the outer layer body 3. Both sheets 3a and 3b form an absorbent main body 5. Both sheets 3a and 3b may be of the same type or different from each other.
In the present specification, "same type of sheet" means sheets having the same sheet manufacturing process, type of sheet constituent fibers, fiber diameter and length of constituent fibers, sheet thickness, basis weight, etc. do. If at least one of these is different, it is a "heterogeneous sheet".

The outer layer body 3 may have liquid impermeableness (including poor liquid permeability and water repellency) as a whole layer, and it is sufficient that an aqueous liquid such as a body fluid does not easily permeate the outer layer body 3 in the thickness direction, for example. A liquid permeable sheet may be included as part of the laminated structure. The outer layer 3 typically includes a liquid-impermeable sheet called a back surface sheet, a leak-proof sheet, or the like. As the outer layer 3, any absorbent material of this type that can be used as a back sheet, a leak-proof sheet, or the like can be used without particular limitation, provided that it does not deviate from the gist of the present invention. For example, various non-woven fabrics can be used. , A resin film, a laminate of a resin film and a non-woven fabric, or the like can be used.

In the present embodiment, as shown in FIG. 2, the absorber 4 has a shape that is long in one direction in a plan view (rectangular shape in the form shown in FIG. 2), and the longitudinal direction thereof and the vertical direction X of the diaper 1A are Arranged to match. The absorber 4 is arranged at least in the inseam B, and in the present embodiment, the absorber 4 is arranged so as to extend from the ventral side A to the dorsal side C via the inseam B. The both longitudinal edges of the absorber 4 (both edges along the longitudinal direction X) are located inward of the both edges along the longitudinal direction X of the diaper 1A.

In the present embodiment, as shown in FIG. 3, the absorber 4 has a core wrap that covers an absorbent core 40 mainly made of a water-absorbent material and an outer surface (skin facing surface and non-skin facing surface) of the absorbent core 40. Includes sheet 41. As the water-absorbent material, one or more selected from fiber materials such as wood pulp and water-absorbent polymers are typically used. The core wrap sheet 41 has liquid permeability and is typically made of paper, non-woven fabric or the like. The absorber 4 may be composed of only the absorbent core 40 without including the core wrap sheet 41.

In the present embodiment, the diaper 1A includes a pair of leakage-proof cuffs 6 and 6 arranged along both sides of the absorbent body 5 along the vertical direction X. Each leak-proof cuff 6 includes a liquid-impermeable and breathable leak-proof sheet 60, and the leak-proof sheet 60 is fixed to another member (outer layer 3 in the form shown in FIG. 3) on one end side in the lateral direction Y. The fixed end and the other end in the lateral direction Y are free ends that are not fixed to other members. An elastic member 61 for forming a leak-proof cuff is fixed at the free end of the leak-proof sheet 60 in an extended state in the vertical direction X so as to be expandable and contractible in the same direction. When the diaper 1A is worn, the contraction force of the elastic member 61 causes the free end side of the leak-proof sheet 60 to stand up on the wearer side with the fixed end as the standing base end, at least in the inseam B. The leak-proof cuffs 6 and 6 stand up to prevent the outflow of excrement such as urine to the outside in the lateral direction Y. Although the leak-proof cuff 6 is shown in an upright state in FIG. 3 for convenience of explanation, the leak-proof cuff 6 does not necessarily stand up as shown in FIG. 3 in the unfolded and extended diaper 1A as shown in FIG. That is not the case.

As shown in FIGS. 1 and 2, the diaper 1A has a pair of fastening tapes 7 and 7 arranged on both side edges along the vertical direction X of the dorsal side portion C as a configuration peculiar to the deployable absorbent article. A fastening member 8 which is arranged on the non-skin facing surface of the ventral side A (the non-skin facing surface of the outer layer 3) and which can detachably fasten the engaging portion 71 of each fastening tape 7 is provided. When the diaper 1A is worn, the engaging portion 71 is fastened to the fastening member 8.

In the present embodiment, the pair of fastening tapes 7 and 7 are provided so as to extend outward in the lateral direction Y from both side edges of the dorsal portion C along the vertical direction X, respectively. One end of each fastening tape 7 on the inner side in the lateral direction Y is fixed to a sheet constituting the diaper 1A. For example, between the leak-proof sheet 60 and the outer layer body 3, or the outer layer body 3 forms a laminated structure. If they are, they are fixed between the sheets constituting the laminated structure. The fastening tape 7 has a tape base material 70 and an engaging portion 71 fixed to the skin-facing surface of the tape base material 70. The engaging portion 71 has an engaging protrusion on the surface facing the skin. As the engaging portion 71, a male material of a mechanical fastener can be used. The mechanical fastener is composed of a male material in which a large number of engaging protrusions are arranged on the surface and a female material in which a material capable of directly engaging the engaging protrusions is arranged on the surface. A fastener that is made to engage with each other by making surface contact with each other. As the mechanical fastener, various known ones can be used without particular limitation.

In the present embodiment, the fastening member 8 is configured to include the female material of the mechanical fastener. The material forming the portion of the fastening member 8 to which the engaging portion 71 is fastened, that is, the material of the female material can be selected according to the shape of the engaging protrusion of the engaging portion 71. As the material of the female material, for example, a loop portion, a mesh portion, or the like, or a non-woven fabric having a high degree of engagement can be used.

In the present embodiment, as shown in FIG. 2, the diaper 1A includes a flap portion 9 extending outward from the peripheral edge of the absorbent body 5 (absorbent body 4). The flap portion 9 is composed of members (inner layer body 2, outer layer body 3, leak-proof sheet 60, etc.) extending outward from the peripheral edge of the absorbent body 5. The plurality of members constituting the flap portion 9 are joined to each other by known joining means such as an adhesive, a heat seal, and an ultrasonic seal. The side flap portion 90 is a portion of the flap portion 9 located on both side edges of the absorbent body 5 along the vertical direction X and on the outer side in the lateral direction Y from the virtual extension lines of the both side edges. In each of the pair of side flap portions 90, 90, an elastic member 91 for forming leg gathers extending in the vertical direction X through the crotch portion B is arranged so as to be expandable and contractible in the vertical direction X. When the diaper 1A is worn, due to the contraction of the elastic member 91, the sheets (in the present embodiment, the outer layer 3 and the leak-proof sheet 60) constituting the leg edge portions LS and LS extend in a direction intersecting the contraction direction of the elastic member 91. A plurality of folds (gathers) are formed, thereby forming leg gathers in which the folds are substantially continuous over the entire circumference of the wearer's legs.

4 to 6 show a pants-type disposable diaper 1B, which is an embodiment of the absorbent article of the present invention. Regarding the diaper 1B, a configuration different from that of the diaper 1A described above will be described, and the same configuration as the diaper 1A will be designated by the same reference numerals and the description thereof will be omitted. As for the configuration not particularly described in the diaper 1B, the description about the diaper 1A is appropriately applied.

In the diaper 1B, as shown in FIG. 4, both side edge portions are joined to each other in the vertical direction X of the outer layer bodies 3 of the ventral side portion A and the dorsal side portion C, and a pair of side seal portions formed by the joint portions. It has S, S, waist opening WH and a pair of leg openings LH, LH.

In the present embodiment, as shown in FIG. 6, the outer layer 3 of the diaper 1B includes a first outer layer sheet 3c, a second outer layer sheet 3d, and a third outer layer sheet 3e in the order closer to the absorber 4, and has a three-layer structure. Is. The third outer layer sheet 3e forms a non-skin facing surface (outer surface of the diaper 1B) of the outer layer body 3. These sheets 3c, 3d, 3e may be of the same type or different from each other.
Of these sheets 3c, 3d, 3e, the sheet 3c constitutes the absorbent main body 5, and the sheets 3d, 3e both constitute the outer packaging material 30. The outer packaging material 30 (sheets 3d, 3e) has a larger dimension in a plan view than the sheet 3d, and forms the outer shape of the unfolded diaper 1B as shown in FIG. The contour lines of A, the inseam B, and the dorsal side C are formed. Each member constituting the outer packaging material 30 is integrated by a joining means such as an adhesive or fusion.

In the form shown in FIG. 6, a part of the leak-proof sheet 60 is the non-skin facing surface side of the absorber 4, specifically, the first outer layer sheet 3c and the second outer layer sheet d (outer packaging material 30). Although it is arranged in between, such "essentially, it is arranged closer to the wearer's skin than the absorber, and a predetermined function is exhibited on the side closer to the wearer's skin than the absorber. Even if a part of "members expected to be used" (hereinafter, also referred to as "skin side member") is arranged on the non-skin facing surface side of the absorber, a part of the skin side member is It is not the "outer layer" referred to in the present invention. Further, since the inner layer 2 is also the skin side member, a part of the inner layer 2 such as the surface sheet is tentatively arranged on the non-skin facing surface side of the absorber 4 like the leak-proof sheet 60 in FIG. Even so, a part of the inner layer 2 is not the outer layer 3.

As the sheets 3d and 3e constituting the outer packaging material 30, non-woven fabrics and resin films produced by various manufacturing methods can be used, provided that they do not deviate from the gist of the present invention, and the non-woven fabrics include, for example, spunbonded non-woven fabrics. , Air-through non-woven fabric, needle punch non-woven fabric and the like. Further, the sheets 3d and 3e may be elastic sheets having elasticity in the lateral direction Y, or non-expandable sheets having no elasticity. As an example of the stretchable sheet, "a large number of elastic filaments arranged so as to extend in one direction without intersecting each other, which are substantially non-stretched, contain non-elastic fibers" described in JP-A-2009-61743. An example of an elastic sheet formed by being joined to a stretchable non-woven fabric to be constructed. For example, the third outer layer sheet 3e (the outermost layer sheet) can be used as this stretchable sheet, and the second outer layer sheet 3d can be used as a non-stretchable sheet.

In the present embodiment, in the diaper 1B, the waist circumference portion D (the portion at the same position in the vertical direction X as the side seal portion S) arranged around the waist circumference of the wearer has elasticity in the horizontal direction Y. There is. Specifically, a plurality of elastic members 92 around the waist are included between the sheets 3d and 3e constituting the outer packaging material 30 of the waist peripheral portion D so as to be stretchable in the lateral direction Y, and the elastic members 92. Due to the elastic elasticity of the waist, the waist circumference D has elasticity in the lateral direction Y. The plurality of elastic members 92 extend in the lateral direction Y at the waist circumference D and are intermittently arranged in the vertical direction X. The waist circumference D is manufactured by fixing the elastic member 92 between the seats 3d and 3e in a laterally extended state, and then releasing the elastic member 92 from the extended state. When the diaper 1B is worn, a plurality of folds (gathers) extending in the direction intersecting the elastic member 92 (vertical direction X) are formed on the surface of the waist circumference D due to the contraction of the elastic member 92. The portion of the waist circumference D that overlaps with the absorber 4 in a plan view is treated so that the elastic member 92 is not elastically stretchable, such as by dividing the elastic member 92. Therefore, the portion is treated so that the elastic elasticity of the elastic member 92 is not exhibited. It has no elasticity in the lateral direction Y.

Hereinafter, diapers 1A and 1B are collectively referred to as "diapers 1". The following description of diaper 1 applies to both diapers 1A and 1B unless otherwise specified.

In the diaper 1, as shown in FIGS. 1 and 3, the sensor-corresponding region 10 to which the sensor 20 can be attached absorbs a part of the non-skin facing surface of the outer layer 3 forming the outer surface of the inseam B. It is provided so as to include a region that overlaps with the body 4 in a plan view. The sensor 20 is not a component of the absorbent article of the present invention.

The sensor 20 includes a sensor (temperature sensor) capable of detecting the temperature of a portion of the diaper 1 that overlaps the sensor 20 in a plan view. The sensor 20 may be able to detect information other than temperature, and examples of information other than temperature include humidity.
The number of sensors 20 attached to the sensor-corresponding region 10 is not particularly limited. When the number of sensors 20 attached to the sensor-corresponding region 10 is one, the one sensor 20 is a temperature sensor capable of detecting at least the temperature of the diaper 1. When the number of sensors 20 attached to the sensor-corresponding region 10 is plurality, at least one of the plurality of sensors 20 may function as a temperature sensor. For example, a temperature sensor and a humidity sensor for detecting humidity may be attached to the sensor-corresponding region 10 as the sensor 20.

In the present embodiment, the sensor 20 includes a sensor unit (not shown) for detecting temperature, a battery (not shown) for supplying power to the sensor unit, and a housing 21 which is a box body containing these. There is. The housing 21 is provided with a power button (not shown) for turning on / off the sensor 20, an indicator (not shown) that changes the display color and blinking pattern according to the operating state of the sensor 20 and the like. .. The sensor 20 is turned on by pressing the power button, detects the temperature of the diaper 1 and other information about the diaper 1 at a predetermined cycle, and detects the information at a position away from the sensor 20 at a predetermined cycle. Send to a communication terminal device (not shown). The communication terminal device is, for example, a smartphone, a tablet, or a personal computer.

The housing 21 has a predetermined thickness for incorporating the sensor portion and the like. The shape of the sensor 20 is not particularly limited. In the present embodiment, as shown in FIGS. 1 and 3, it has an elliptical shape in a plan view and has a rounded shape without corners. Further, the housing 21 is waterproof in order to protect the built-in sensor portion and the like from moisture.

The housing 21 has an engaging portion (not shown) on a surface that comes into contact with the sensor compatible region 10 when it is attached to the sensor compatible region 10, and a member (outer layer body 3) constituting the sensor compatible region 10 via the engaging portion. It is fixed to the member that forms the non-skin facing surface). The engaging portion may be, for example, a male material of a mechanical fastener similar to the engaging portion 71 of the fastening tape 7 described above.

As described above, the sensor-corresponding region 10 includes a region existing in the crotch portion B and overlapping with the absorber 4 in a plan view, and overlaps with the projected image when the absorber 4 is projected in the thickness direction. One of the important roles of the sensor 20 attached to the sensor-corresponding region 10 is to detect the temperature affected by the excrement absorbed and held by the absorber 4, and therefore, from the viewpoint of improving the detection sensitivity of the sensor 20. Therefore, the mounting position of the sensor 20 is preferably a region that overlaps the crotch portion B and the absorber 4 in a plan view, and from that viewpoint, the sensor corresponding region 10 is a crotch portion B and a region that overlaps the absorber 4 in a plan view. Must include overlapping areas. However, on the premise that the sensor-corresponding region 10 exists in the lower crotch B and includes a region that overlaps with the absorber 4 in a plan view, a region that does not overlap with the absorber 4 in a plan view, for example, the absorber 4 It may include a peripheral portion of overlapping regions in a plan view.

In the present embodiment, as shown in FIGS. 1 and 3, the existence of the sensor-corresponding region 10 is visually recognizable. Specifically, the entire sensor-corresponding region 10, which is a part of the non-skin facing surface of the outer layer 3 of the inseam B, is colored in a color different from that of the peripheral portion by printing or the like. When the existence of the sensor-corresponding area 10 is visually recognizable in this way, it is possible to smoothly perform the mounting work of the sensor 20 without taking time to confirm the mounting position when mounting the sensor 20. It becomes.

In the present invention, the method of visually recognizing the existence of the sensor-compatible region 10 is not particularly limited. For example, even if only the contour line of the sensor-compatible region 10 is colored without coloring the entire sensor-compatible region 10. good. Further, for example, characters, figures, patterns, etc. indicating the existence of the sensor-compatible area 10 may be printed on an arbitrary portion (not necessarily the sensor-compatible area 10) of the non-skin facing surface of the outer layer body 3. Further, instead of printing coloring, characters, figures, patterns, etc., or together with such printing, a concave portion or a convex portion is formed in the sensor compatible region 10 within a range that does not deviate from the gist of the present invention. The three-dimensional structure of 10 may be different from that of the peripheral portion.

As one of the main features of the diaper 1, in the outer layer 3 of the inseam B, the first portion 31 provided with the sensor-corresponding region 10 on the non-skin facing surface has the sensor-corresponding region 10 on the non-skin facing surface. There is a point that the thermal conductivity is higher than that of the second portion 32 in which is not provided.
The first portion 31 is the entire portion that overlaps the sensor-corresponding region 10 in the outer layer body 3 of the inseam B in a plan view, and the second portion 32 is other than the first portion 31 in the outer layer body 3 of the inseam B. Is the part of.

The "heat retention power value" can be used as an index of the "heat conductivity". The heat-retaining power value is the power required for a substance in contact with the outside air to maintain a constant temperature, and is measured by the following method, and the unit is "W / m ² ". The heat-retaining power value is a physical property value indicating the heat-retaining property (difficulty of heat flow in the substance) of the substance. It is defined as "power per unit area required to keep the temperature of one surface constant". It is said that the smaller the value of the heat-retaining power value, the slower the heat transfer speed in the substance, and the higher the heat-retaining property, that is, the lower the heat conductivity. Therefore, in the diaper 1 in which the first portion 31 has higher thermal conductivity than the second portion 32, the relationship of "first portion 31> second portion 32" is established with respect to the heat insulating power value.

<Measurement method of heat retention power value>
This measuring method is performed by using a measuring device of "q-max" which is the maximum value of the heat flow rate that moves per unit area and is used as an index of the feeling of coolness and warmth of contact. An example of such a measuring device is "KES-F7 Thermolab" manufactured by Kato Tech Co., Ltd. Specifically, using KES-F7, the skin-facing surface or non-skin facing surface of the evaluation target (for example, the first portion 31 or the second portion 32 of the outer layer 3 taken out from the diaper 1) according to the dry contact method. The heat-retaining power values at any 12 points on the surface facing the skin are measured, and the arithmetic mean value is used as the heat-retaining power value to be evaluated. The larger the heat-retaining power value, the higher the thermal conductivity (lower the heat-retaining property) of the evaluation target.

When measuring the heat retention power value of the outer layer body, when the outer layer body is taken out from the absorbent article, if the outer layer body is fixed to another member by an adhesive, fusion, etc., the fixed portion thereof. Apply an organic solvent to the battery, blow cold air from a cold spray, etc. to release the fixation, and then remove the battery. The procedure for removing the member from this absorbent article is common to all measurements herein.

Increasing the thermal conductivity of the outer layer 3 (increasing the heat retention power value) improves the detection sensitivity of the sensor 20 attached to the outer layer 3 to detect the heat in the diaper 1, while the heat of the outer layer 3 is increased. Depending on the specific means for increasing the conductivity, there is a concern that the excrement may induce an inconvenience of seeping out through the outer layer 3. On the other hand, in the present invention, as described above, only the first portion 31 of the outer layer body 3 is selectively made thinner in comparison with the second portion 32 to be a portion having high thermal conductivity. Therefore, while preventing the occurrence of inconvenience (excretion through the outer layer 3 of excrement, etc.), which is a concern due to the increased thermal conductivity of the outer layer 3 (first portion 31), the sensor 20 It is possible to increase the sensitivity, and as a result, it is possible to detect the excretion of the wearer of the diaper 1 by the sensor 20 with high accuracy.

Further, in the present invention, since the sensor 20 is attached to the outer surface of the inseam B of the diaper 1 (the non-skin facing surface of the outer layer 3), when clothing is worn from above the worn diaper 1, the inseam B and the diaper 1 are attached. A sensor 20 may be interposed between the garment and a gap may be formed between the inseam B and the garment. That is, the sensor 20 can function as a spacer that prevents the diaper 1 and the clothing layered on the diaper 1 from coming into close contact with each other. Due to the spacer function of the sensor 20, even if the excrement in the diaper 1 exudes to the outside on the outer surface of the inseam B, the chance of the exuded excrement adhering to clothing is reduced, so that the excrement Clothes can be prevented from being soiled. Further, if a gap is formed between the crotch portion B centered on the sensor 20 and the clothing layered on the crotch portion B, the hot air generated from the sensor 20 is likely to diffuse to the periphery through the gap, so that the sensor 20 is attached. The inconvenience caused by this can be suppressed.

In the outer layer 3 of the crotch portion B, the above-mentioned "heat conductivity of the first portion 31> thermal conductivity of the second portion 32" (heat insulation power value of the first portion 31> heat retention power of the second portion 32). From the viewpoint of ensuring that the action and effect of establishing the relationship of (value) is more reliably achieved, it is preferable to set the heat insulating power value of each part of the outer layer 3 as follows.
The ratio of the heat-retaining power value of the first part 31 to the heat-retaining power value of the second part 32 is preferably 1.01, more preferably 1.1 or more, as the former / the latter, assuming the former> the latter. And it is preferably 10 or less, more preferably 2 or less.
The heat-retaining power value of the first portion 31 is preferably 0.50 W / m ² or more, more preferably 0.70 W / m ² or more, assuming that it is larger than the heat-retaining power value of the second portion 32. Then, it is preferably 1.50 W / m ² or less, and more preferably 1.00 W / m ² or less.
The heat-retaining power value of the second portion 32 is preferably 0.20 W / m ² or more, more preferably 0.50 W / m ² or more, assuming that it is smaller than the heat-retaining power value of the first part 31. Then, it is preferably 1.0 W / m ² or less, and more preferably 0.90 W / m ² or less.

In the outer layer 3 of the inseam B, the above-mentioned "heat conductivity of the first portion 31> thermal conductivity of the second portion 32" (heat retention power value of the first portion 31> heat retention power of the second portion 32). From the viewpoint of establishing the relationship (value), it is preferable that the first portion 31 is thinner than the second portion 32. That is, as one of the means for establishing such a magnitude relationship of thermal conductivity, it is possible to establish the relationship "thickness of the first portion 31 <thickness of the second portion 32".

The ratio of the thickness of the first portion 31 to the thickness of the second portion 32 has advantages (improvement of heat conductivity and heat transfer rate) and disadvantages (decrease in strength of the first portion 31, etc.) due to the former becoming thinner. ), Assuming the former <the latter, the former / the latter is preferably 0.01 or more, more preferably 0.05 or more, further preferably 0.09 or more, and preferably 0.80 or less. It is more preferably 0.50 or less, still more preferably 0.46 or less.
Assuming that the thickness of the first portion 31 is thinner than the thickness of the second portion 32, the thickness is preferably 0.05 mm or more, more preferably 0.1 mm or more, and preferably 0.50 mm or less. It is preferably 0.02 mm or less.
Assuming that the thickness of the second portion 32 is thicker than the thickness of the first portion 31, the thickness is preferably 0.1 mm or more, more preferably 0.15 mm or more, and preferably 2.0 mm or less. It is preferably 1.5 mm or less.
The thickness of the outer layer body 3 (first portion 31, second portion 32) referred to here is measured with respect to the outer layer body taken out from the absorbent article by the following method.

<Thickness measurement method>
The sheet (outer layer body 3) to be measured is cut along the thickness direction, the cut surface is observed using a "microscope" (manufactured by Keyence Co., Ltd., VHX-1000), and the measurement target is measured based on the observed image. The thickness of the portion (first portion 31, second portion 32) is measured. The thickness of any 10 points at the measurement target site is measured, and the arithmetic mean value of the thicknesses at those 10 points is defined as the thickness of the measurement target site.

The method for establishing the above-mentioned "thickness of the first portion 31 <thickness of the second portion 32" in the outer layer 3 of the inseam B is not particularly limited, and the first portion 31 and the second portion 32 are not particularly limited. Then, in addition to the method of making the thickness different originally (without compression in the thickness direction of the former), for example, in the outer layer body 3 having a uniform thickness, only the first portion 31 is thickened by embossing or the like. A method of compressing in the direction can be mentioned. In the outer layer 3 obtained by such a selective compression method, the compressed first portion 31 is thinner and has higher thermal conductivity than the uncompressed second portion 32 (heat retention power). The value is large), but the composition of both is the same as each other.

In the outer layer 3 of the inseam B, the above-mentioned "heat conductivity of the first portion 31> thermal conductivity of the second portion 32" (heat retention power value of the first portion 31> heat retention power of the second portion 32). As a means for establishing the relationship of value), in addition to the method of providing a thickness difference between the two portions 31 and 32 described above, a method of giving a difference in composition between the two portions 31 and 32 can be mentioned. Specifically, a method of including a material having high thermal conductivity such as a metal material in the first portion 31 which should have relatively high thermal conductivity can be mentioned. That is, from the viewpoint of establishing the magnitude relationship of the thermal conductivity, it is preferable that the first portion 31 contains a metal material.
Examples of the metal material include aluminum, tin, chromium, nickel, gold, silver, copper, germanium, titanium oxide, zinc oxide, nitrogen oxide, magnesium fluoride, etc., and one of these may be used alone or in combination of two. The above can be used in combination.

The content of the metal material in the first portion 31 is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1% by mass, based on the total mass of the first part 31. % Or more, preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less.
The second portion 32 typically contains substantially no metal material, but the amount of metal is smaller than the content of the metal material in the first portion 31 without departing from the gist of the present invention. It may contain material.

The method of incorporating the metal material in the first portion 31 is not particularly limited, and for example, a method of kneading the metal material into the resin forming the constituent fibers of the first portion 31, and depositing the metal material in the first portion 31. Examples thereof include a method, a method of laminating a metal sheet made of a metal material on the first portion 31, and the like. That is, the metal material may be scattered in the first portion 31, or when the skin facing surface (facing surface with the absorber 4) of the first portion 31 or the first portion 31 has a laminated structure. It may be intervened as a metal layer inside the laminated structure.

It is preferable that the first portion 31 has liquid impermeability and is more breathable than the second portion 32. As a result, the air permeability of the sensor-corresponding region 10 to which the sensor 20 is attached is enhanced, so that the hot air generated from the sensor 20 can be quickly removed. Improvement can be expected.
However, increasing the air permeability of the outer layer 3 (first portion 31) leads to a decrease in the density of the outer layer 3 and an increase in the interfiber distance of the constituent fibers, and in some cases, the main outer layer 3 is main. Leakage resistance, which is one of the functions, is lowered, and there is a concern that excrement may seep out of the diaper 1 via the outer layer 3. Therefore, it is preferable that the first portion 31 has liquid impermeability even when the air permeability is high in comparison with the second portion 32.

The water pressure resistance measured by the following method can be used as an index for determining whether or not the outer layer 3 (first portion 31, second portion 32) has liquid impermeability. The water pressure resistance of the sheet to be evaluated is preferably 1000 mmAq. As mentioned above, more preferably 1500 mmAq. If it is the above, it can be evaluated that the sheet has liquid impermeability.

<Measurement method of water pressure resistance>
The water pressure resistance of the sheet to be measured is measured in accordance with JIS L1092-1998 water resistance test (hydrostatic pressure method) A method (low water pressure method). During the water resistance test, a nylon mesh sheet (pore size: 133 μm, thickness: 121 μm, manufactured by Kurabo Industries Ltd., DO-ML-20) is placed on the test piece for measurement. If the size of the test piece is less than the specified size, a device having a reduced measurement area so that water hits the test piece in an area that can be collected can be assembled, and the water pressure resistance can be measured by the same method. Three test pieces are prepared for each sheet to be measured, each measurement is performed, and the arithmetic mean value of the measured values is used as the water pressure resistance of the sheet to be measured.

The "ventilation resistance value" can be used as an index of the "breathability". A small ventilation resistance value means that the passing volume of air per unit time and unit area is large, and the ventilation is high. On the contrary, when the ventilation resistance value is large, it means that the passing volume of air per unit time and unit area is small and the air permeability is low. Therefore, in the diaper 1 in which the first portion 31 is more breathable than the second portion 32, the relationship of "first portion 31 <second portion 32" is established with respect to the ventilation resistance value.

In the outer layer 3 of the inseam B, the action and effect due to the above-mentioned relationship of "ventilation resistance value of the first portion 31 <ventilation resistance value of the second portion 32" is established more reliably. From the viewpoint, the ratio of the ventilation resistance value of the first portion 31 to the ventilation resistance value of the second portion 32 is preferably 0.001 or more, more preferably 0, as the former / the latter, assuming the former <the latter. It is .005 or more, preferably 0.5 or less, and more preferably 0.1 or less.
The aeration resistance value of the first portion 31 is preferably 0.005 kPa · s / m or more, more preferably 0.01 kPa · s / m or more, and preferably 5 kPa · s / m or less, more preferably 3 kPa · s. It is s / m or less.
The aeration resistance value of the second portion 32 is preferably 0.005 kPa · s / m or more, more preferably 0.01 kPa · s / m or more, and preferably 5 kPa · s / m or less, more preferably 3 kPa · s. It is s / m or less.
The aeration resistance value of the outer layer body 3 (first portion 31, second portion 32) referred to here is measured with respect to the outer layer body taken out from the absorbent article by the following method.

<Measurement method of ventilation resistance value>
The ventilation resistance value of the sheet to be measured is measured using a breathability tester "KES-F8-AP1AIR PERMEABILITY TESTER" (trade name) manufactured by Kato Tech. Specifically, the air permeability tester is used to measure the air flow resistance values at arbitrary 12 points on the sheet to be measured according to a conventional method, and the arithmetic mean value is used as the air flow resistance value of the sheet.

The aeration resistance value can be adjusted by adjusting the density of the outer layer body 3, the interfiber distance of the constituent fibers, and the like. As a method of establishing the above-mentioned "ventilation resistance value of the first portion 31 <ventilation resistance value of the second portion 32" in the outer layer body 3 of the inseam B, a highly breathable material is provided in the first portion 31. (For example, a method using a material having a relatively low fiber density) and a method using a low air permeability material (for example, a material having a relatively high fiber density, a resin film) in the second portion 32 can be mentioned. May be used together.

In the present invention, as described above, the sensor-corresponding region 10 may be arranged so as to overlap the absorber 4 in a plan view on a part of the non-skin facing surface of the outer layer body 3 of the inseam B, and is arbitrary within that range. Can be set to. FIG. 7 shows an example of an arrangement pattern of the sensor-corresponding region 10 (first portion 31) in the diaper 1 (diapers 1A, 1B).

In FIG. 7A, the pair of straight lines VL and VL extending in the vertical direction X are virtual straight lines passing through both ends of the horizontal direction Y at the portion where the length (width) of the horizontal direction Y is the largest in the absorber included in the diaper 1. The region (hereinafter, also referred to as “absorbent width region”) 42 sandwiched between the pair of virtual straight lines VL and VL is a region that overlaps the absorber in a plan view, and the absorber is vertically X. It consists of both the virtual extension area and the virtual extension area when it is virtually extended.
In the form shown in FIG. 7A, the sensor-corresponding region 10 (first portion 31) is located in a part of the absorber width region 42 of the inseam B, specifically, in the central portion in the vertical direction X. Moreover, it straddles the vertical center line CLx passing through the center of the vertical direction X of the diaper 1.

In the form shown in FIG. 7B, the sensor-corresponding region 10 (first portion 31) extends continuously over the entire length of the absorber width region 42 of the inseam B in the vertical direction X. , The same as the form shown in FIG. 7 (a).
In the form shown in FIG. 7 (c), the sensor-corresponding region 10 (first portion 31) extends continuously over the entire length of the crotch portion B in the lateral direction Y, and extends laterally from the absorber width region 42. It is the same as the form shown in FIG. 7A except that the portion including the portion extending to the outside of Y is included.

In each of the modes shown in FIGS. 7 (d) to 7 (f), a plurality of sensor-corresponding regions 10 (first portion 31) having an elliptical shape in a plan view are arranged close to each other to form one cohesive region. It is the same as the form shown in FIGS. 7 (a) to 7 (c) except that 11 is formed. A second portion 32 having no sensor-corresponding region 10 may exist between the adjacent sensor-corresponding regions 10 in the region 11, but the area of the second portion 32 existing in this region 11 is extremely small. It does not substantially affect the thermal conductivity of the region 11. In the modes shown in FIGS. 7 (d) to 7 (f), the sensor 20 can be attached to an arbitrary position in the region 11, and for example, one sensor 20 is attached so as to straddle a plurality of sensor-corresponding regions 10. You may.
The form shown in FIG. 7D is the same as the one in which the single sensor-corresponding region 10 in FIG. 7A is replaced with the area 11, and corresponds to the form shown in FIG. 7A. Such a correspondence also exists in the form shown in FIG. 7 (e) and the form shown in FIG. 7 (b), and the form shown in FIG. 7 (f) and the form shown in FIG. 7 (c).

The arrangement pattern of the sensor-corresponding region 10 (first portion 31) can be appropriately selected according to the type of the absorbent article. Specifically, for example, a deployable absorbent article such as the diaper 1A shown in FIG. 1 (fastening tape 7 provided on both side edges of the dorsal side C along the vertical direction X and the ventral side A facing the non-skin). An absorbent article provided on the surface and provided with a fastening member 8 capable of fastening the fastening tape 7) and a pants-type absorbent article (ventral part A and dorsal side C) such as the diaper 1B shown in FIG. An arrangement pattern of the sensor-corresponding region 10 (first portion 31) with an absorbent article in which both side edges along the respective vertical directions X are joined to form a waist opening WH and a leg opening LH). May be different.

With reference to FIG. 7, when the diaper 1 is a deployable absorbent article, the sensor-corresponding region 10 is (i) unevenly distributed in the center of the inseam B in the lateral direction Y (the inseam B in the lateral direction Y). It is preferable that it does not exist on both sides of the body), and (ii) it is more preferable that it is unevenly distributed in the absorber width region 42. The forms shown in FIGS. 7 (a), 7 (b), 7 (d) and 7 (e) all satisfy both the above (i) and (ii).

In addition to the above (i) and (ii), the diaper 1 which is a deployable absorbent article further has a vertical center line Clx (diaper 1) in the (iii) sensor-corresponding region 10 as shown in FIG. 7 (a). The portion located closer to the ventral side A than the vertical center line CLx is located closer to the ventral sensor-corresponding region 10A and the dorsal side C than the vertical center line CLx. It is particularly preferable that all of the following (1) to (3) are satisfied when the portion corresponding to the dorsal sensor is set to the dorsal sensor compatible region 10C.
(1) Area of area 10A corresponding to the ventral sensor> 0
(2) Area of area 10C corresponding to the dorsal sensor ≥ 0
(3) Area of ventral sensor compatible area 10A> Area of dorsal sensor compatible area 10C

In the arrangement pattern of (iii), the sensor-corresponding region 10 is always present on the ventral side A side of the vertical center line CLx (the above (1)), and is located on the dorsal side C side of the vertical center line CLx. It does not have to be present ((2) above) and is biased toward the ventral side A ((3) above).
In the embodiment shown in FIG. 7A, the ventral sensor-corresponding region 10A and the dorsal sensor-corresponding region 10C are connected and integrated, but even if they are not connected and are separated in the vertical direction X. good.

With reference to FIG. 7, when the diaper 1 is a pants-type absorbent article, the sensor-corresponding region 10 is (iv) unevenly distributed in the center of the vertical direction X of the inseam B (vertical direction X of the inseam B). It is preferable that it does not exist at both ends of the. The forms shown in FIGS. 7 (a), 7 (c), 7 (d) and 7 (f) all satisfy the above (iv). The diaper 1, which is a pants-type absorbent article, more preferably satisfies the above (iii) in addition to the above (iv), and further satisfies the above (ii) in addition to the above (iv) and (iii). Especially preferable.

Regarding the arrangement pattern of the sensor-corresponding region 10 (first portion 31), what is preferable in the deployable absorbent article is unevenly distributed in the center of the “inseam B in the lateral direction Y” in (i) above (i). It is common in that it does not exist on both sides of the inseam B in the lateral direction Y), and what is preferable in the pants-type absorbent article is the above-mentioned (iv) "Vertical direction X of the inseam B". It is common in that it is unevenly distributed in the center of the inseam (it does not exist at both ends of the vertical direction X of the inseam B). That is, in the deployable absorbent article, the sensor-compatible area is preferably unevenly distributed in the lateral center of the absorbent article, and in the pants-type absorbent article, the sensor-compatible area is unevenly distributed in the vertical center of the absorbent article. It is preferable to have. As described above, the reason why the direction in which the sensor-compatible region 10 is unevenly distributed differs between the deployable absorbent article and the pants-type absorbent article is the manufacturing efficiency of the absorbent article, particularly the processing for arranging the sensor-compatible region. Due to ease. That is, since the deployable absorbent article typically matches the vertical direction of the absorbent article with the flow direction (so-called MD: Machine Direction) at the time of manufacturing, the sensor-corresponding region at the time of manufacturing the absorbent article is arranged. For example, when the vertical length of the sensor-compatible area is changed, it is relatively easy to respond to the pattern change in the vertical direction along the MD, but it is difficult to respond to the pattern change in the horizontal direction. There is. Therefore, when the sensor-compatible area is unevenly distributed in the deployable absorbent article, the vertical length of the sensor-compatible area in the basic pattern is based on the pattern in which the sensor-compatible area is unevenly distributed in the lateral center of the absorbent article. It is preferable to change. On the other hand, the pants-type absorbent article typically aligns the lateral direction of the absorbent article with the MD. Therefore, according to the above viewpoint, when the sensor-corresponding area is unevenly distributed in the pants-type absorbent article, the sensor is supported. It is preferable to change the length of the sensor-corresponding region in the horizontal and vertical directions in the basic pattern based on the pattern in which the regions are unevenly distributed in the vertical center of the absorbent article.

FIG. 8 shows a cross section along the thickness direction of the inseam B in the modified example of the diaper 1. Each of the diapers 1 shown in FIG. 8 is a modified example of the form shown in FIG. 7 (a). Therefore, the first portion 31 (sensor-corresponding region 10) is the vertical direction of the absorber width region 42 of the inseam B. It is located in the center of X and straddles the vertical center line CLx passing through the center of the vertical direction X of the diaper 1.
In the diaper 1 shown in FIG. 8, the outer layer body 3 includes a first outer layer sheet 3f and a second outer layer sheet 3g in the order of proximity to the absorber 4, and has a two-layer structure. Both sheets 3f and 3g are typically joined by a known joining means such as an adhesive or fusion. The second outer layer sheet 3g forms the non-skin facing surface of the outer layer body 3 and also forms the outer surface of the diaper 1, and the sensor corresponding region 10 is provided on the non-skin facing surface of the second outer layer sheet 3g.

In the form shown in FIG. 8A, the first outer layer sheet 3f is made of a moisture permeable film 35. The moisture permeable film 35 has a uniform thickness and composition. The moisture permeable film 35 may have a single-layer structure or a laminated structure. As the moisture-permeable film 35, a moisture-permeable and liquid-impermeable resin film can be used, and specifically, for example, a microporous film can be used. For the microporous film, for example, a hydrophobic thermoplastic resin (polyolefin resin or the like) and inorganic filler fine particles (calcium carbonate or the like) that are incompatible with the thermoplastic resin are melt-kneaded to form a film. It is obtained by forming and stretching the film uniaxially or biaxially. In the microporous film produced in this way, a large number of micropores (microvoids) are formed from the interface between the thermoplastic resin and the inorganic filler fine particles by stretching. The basis weight of the moisture permeable film 35 is preferably 10 g / m ² or more, more preferably 15 g / m ² or more, and preferably 30 g / m ² or less, more preferably 25 g / m ² or less.

In the form shown in FIG. 8A, the second outer layer sheet 3g has the same thickness but different compositions in the first portion 31 (sensor-corresponding region 10) and the second portion 32. Due to the difference in composition, in the outer layer 3 of the inseam B, the above-mentioned "heat conductivity of the first portion 31> thermal conductivity of the second portion 32" (heat retention power value of the first portion 31). > The relationship of the heat retention power value of the second part 32) is established. Specifically, the second outer layer sheet 3g is one in which a metal material is intentionally contained in a part of the base non-woven fabric 36, and the portion containing the metal material is the first portion 31 and does not contain the metal material. The portion (or the content of the metallic material is smaller than that of the first portion 31) is the second portion 32. The metal material is as described above.

Various non-woven fabrics can be used as the base non-woven fabric 36 constituting the second outer layer sheet 3 g, and examples thereof include air-through non-woven fabrics, spunbond non-woven fabrics, and spunbond-melt blown-spanbond (SMS) non-woven fabrics. One type can be used alone or two or more types can be used in combination. The second outer layer sheet 3g (base material non-woven fabric 36) may have a single-layer structure or a laminated structure. By including these non-woven fabrics in the second portion 32 of the outer layer body 3, the thermal conductivity of the sensor-corresponding region 10 is locally increased, so that heat is effectively transferred to the sensor attached to the sensor-corresponding region 10. This makes it possible to improve the detection sensitivity of the sensor. The basis weight of the second outer layer sheet 3 g (base material non-woven fabric 36) is preferably 10 g / m ² or more, more preferably 12 g / m ² or more, and more preferably 12 g / m 2 or more in both the first portion 31 and the second portion 32. It is preferably 30 g / m ² or less, more preferably 25 g / m ² or less.

The form shown in FIG. 8B is the same as the form shown in FIG. 8A except that the thickness of the first portion 31 (sensor-corresponding region 10) and the second portion 32 are different. In the form shown in FIG. 8B, the relationship "thickness of the first portion 31 <thickness of the second portion 32" is established, and more specifically, the first portion 31 and the second portion 31 The thickness of the first outer layer sheet 3f is the same as that of the portion 32, but the thickness of the second outer layer sheet 3g (base material non-woven fabric 36) is thinner in the former than in the latter.
As described above, in the form shown in FIG. 8B, in the outer layer 3 of the crotch portion B, the above-mentioned “thermal conductivity of the first portion 31> thermal conductivity of the second portion 32” (first portion 31). In order to establish the relationship (the heat-retaining power value of the second portion 32), the thickness of the first portion 31 is further increased by adding a metal material to the first portion 31. It is thinner than the part 32 of. Therefore, the form shown in FIG. 8 (b) has a first portion as compared with the form shown in FIG. 8 (a) in which there is no substantial difference in thickness between the first portion 31 and the second portion 32. The thermal conductivity of 31 is high, and further high sensitivity of the sensor can be expected. Making the thickness of the first portion 31 thinner than that of the second portion 32 can be carried out, for example, by a method of compressing only the first portion 31 in the thickness direction.

In the form shown in FIG. 8C, the second outer layer sheet 3g is made of a base non-woven fabric 37 having irregularities on the surface, and the irregularities are formed on the non-skin facing surface (outer surface of the diaper 1) of the outer layer body 3. In that respect, it is different from the form shown in FIG. 8B, which does not substantially have such unevenness. When unevenness is formed on the non-skin facing surface of the outer layer body 3 in this way, the thickness of the outer layer body 3 can be increased as compared with the case where the unevenness is not formed, so that the sensor-corresponding region 10 and the non-sensor It is possible to effectively create a difference in thermal conductivity from the corresponding region, and as a result, the predetermined effect of the present invention can be more reliably achieved. The base non-woven fabric 37 is basically the same as the above-mentioned base non-woven fabric 36 except that the surface has irregularities. The convex portion forming the unevenness of the surface of the base non-woven fabric 37 may be a solid structure in which fibers are filled inside, or a hollow structure having a space portion of a certain size in which fibers are not filled inside.

All of the forms shown in FIGS. 8 (d) to 8 (g) are common in that the first portion 31 includes the melt blown layer 38.
The "melt-blown layer" referred to here is a fiber layer (a layer of a non-woven fabric directly connected to spinning) in which a thermoplastic resin heated and melted by a so-called melt-blown method is spun and deposited on a conveyor to form a non-woven fabric. In the melt blown method, the molten resin discharged from the nozzle of the spinneret is blown off by a jet stream of high-temperature gas to form ultrafine cotton-like fibers by tearing them apart. Therefore, the obtained melt blown layer is typically a layer of a non-woven fabric made of ultrafine fibers having a fiber diameter of 10 μm or less. The constituent fibers typically consist of long fibers having a fiber length of 30 μm or more. Also, the fiber spacing is small. Such a melt blown layer is excellent in texture and leakage resistance.
Since the first portion 31 is configured to include the melt blown layer 38 having such a feature, the risk of exudation of excrement is reduced and the sensitivity of the sensor attached to the sensor corresponding region 10 is increased. Can be easier.
The melt-blown layer 38 may have a single-layer structure or a laminated structure in which a plurality of layers are laminated on the premise that the melt-blown layer 38 is included. In the latter case, a layer other than the melt-blown layer may be laminated. The basis weight of the melt blown layer 38 is preferably 5 g / m ² or more, more preferably 8 g / m ² or more, and preferably 20 g / m ² or less in both the first portion 31 and the second portion 32. More preferably, it is 30 g / m ² or less.

The following melt-blown non-woven fabric A is mentioned as a preferable example of the melt-blown layer 38. Melt-blown non-woven fabric A: A melt-blown non-woven fabric having an average fiber diameter of 4 μm or less, which is a fiber in a first direction along the plane of the melt-blown non-woven fabric and having the highest straightness of fibers and in a second direction orthogonal to the first direction. Melt-blown non-woven fabric with a straight-line rate of 35% or more.
The melt blown non-woven fabric A has a linearity of 35% or more in both the first direction and the second direction orthogonal to the linearity of the fibers, so that gaps are less likely to occur between the fibers even if they are deformed. , It is possible to suppress a decrease in water pressure resistance.
Details of the melt-blown non-woven fabric A are described in Japanese Patent Application Laid-Open No. 2019-112757, and in the present invention, the technique related to the melt-blown non-woven fabric A described in this publication can be appropriately adopted.

As another preferable example of the melt blown layer 38, the following melt blown non-woven fabric B can be mentioned. Melt-blown non-woven fabric B: It has a laminated structure of a melt-blown layer and a protective layer that overlaps the melt-blown layer, and the laminated structure covers a raised region in which the number of fibers of the melt-blown layer that has entered the protective layer is 2.5 fibers / mm or more. Has melt blown non-woven fabric.
Due to the presence of the raised region, the melt-blown non-woven fabric B is arranged so that some fibers of the melt-blown layer stand up and fill the interfiber space of the melt-blown non-woven fabric B without excessively increasing the amount of fibers. Therefore, the melt blown non-woven fabric B has high leakage resistance without impairing its softness because the through holes in the thickness direction are closed.

In the melt-blown non-woven fabric B, the protective layer is typically arranged on the non-skin facing side of the melt-blown non-woven fabric B, and when the melt-blown non-woven fabric B is used for the outer layer 3 of the diaper 1, the protective layer is more worn than the melt-blown layer. It is placed on the side far from the skin.
In the melt-blown non-woven fabric B, the protective layer is a layer that reinforces the strength and the like of the melt-blown layer, and is composed of, for example, a spunbond layer. The "spun bond layer" referred to here is a layer of non-woven fabric manufactured by the so-called spun bond method, and is a fiber layer in which a heat-melted thermoplastic resin is spun and deposited on a conveyor in the same manner as the melt blown layer. .. However, in the spunbond method, fibers are formed while being cooled and stretched with respect to the molten resin discharged from the spinneret (nozzle). The obtained spunbond layer is a fiber layer composed of fibers (filaments) having a larger fiber diameter and a longer fiber length than the fibers of the melt blown layer. The laminated structure of the melt blown layer and the spunbond layer which is a protective layer can be manufactured, for example, by laminating the spunbond layer on the melt blown layer and then performing heat embossing to integrate the two.
The melt-blown non-woven fabric B typically has an embossed portion (a region where the constituent fibers of the fiber layer are compacted by heat embossing) and a non-embossed portion other than the embossed portion, in which the melt-blown layer and the protective layer are joined. Have. The melt-blown non-woven fabric B preferably has a non-perforated region in the non-embossed portion, and the non-perforated region has a rectangular area having a diagonal length of 10 μm of 25 μm when the melt-blown non-woven fabric B is viewed in a plan view. It is a region having no "through hole" through which the interfiber space including ^two or more regions penetrates in the thickness direction.
Details of the melt-blown non-woven fabric B are described in Japanese Patent Application Laid-Open No. 2019-209121, and in the present invention, the technique relating to the melt-blown non-woven fabric B described in this publication can be appropriately adopted.

In the form shown in FIG. 8D, the first outer layer sheet 3f is made of the moisture permeable film 35, and the second outer layer sheet 3g is made of the melt blown layer 38. The first outer layer sheet 3f (moisture permeable film 35) has a through hole 33 penetrating the sheet 3f in the thickness direction at a position corresponding to the first portion 31 (sensor corresponding region 10), and the through hole 33. Is entirely covered with a second outer layer sheet 3g (melt blown layer 38) arranged on the non-skin facing surface side of the sheet 3f. Therefore, in the form shown in FIG. 8D, the through hole 33 is not exposed on the non-skin facing surface (outer surface of the diaper 1) of the outer layer 3 of the inseam B, and the non-skin facing surface of the outer layer 3 is visually observed. In observation, the through hole 33 is hidden behind the second outer layer sheet 3g and cannot be visually recognized.
In the form shown in FIG. 8D, since the first portion 31 includes the through hole 33, the thickness is thinner than that of the second portion 32 which does not include the through hole 33, whereby the above-mentioned "first portion 31" is included. The relationship of "thermal conductivity of the second portion 32> thermal conductivity of the second portion 32" (heat insulating power value of the first portion 31> thermal conductivity value of the second portion 32) is established. On the other hand, since the through hole 33 of the first portion 31 is covered with the melt blown layer 38 which forms the non-skin facing surface of the outer layer body 3 and has excellent leakage resistance, the excrement absorbed and held by the absorber 4 Is effectively prevented from seeping out through the first portion 31.
In the form shown in FIG. 8D, the first portion 31 (the portion corresponding to the first portion 31 in the melt blown layer 38) may contain a metallic material, in which case a thin thickness and a metallic material may be contained. Due to the interaction with the content of the first portion 31, the thermal conductivity of the first portion 31 is further enhanced, and further higher sensitivity of the sensor can be expected.

The forms shown in FIGS. 8 (e) to 8 (g) are modified examples of the forms shown in FIG. 8 (d), and unless otherwise specified, the configurations applicable to the forms shown in FIG. 8 (d) are these. It is also applicable to the form of. The description of the form shown in FIG. 8D is appropriately applied to the configuration in which the form shown in FIGS. 8 (e) to 8 (g) is not particularly described.

In the form shown in FIG. 8 (e), the first outer layer sheet 3f is made of a melt blown layer 38, and the second outer layer sheet 3g is made of a base non-woven fabric 36 having substantially no unevenness on the non-skin facing surface. The second outer layer sheet 3g (base material non-woven fabric 36) has a through hole 33 penetrating the sheet 3g in the thickness direction at a position corresponding to the first portion 31 (sensor corresponding region 10). The through hole 33 of the second outer layer sheet 3g is exposed and can be visually observed by visually observing the non-skin facing surface of the outer layer body 3. However, since the melt blown layer 38 is interposed between the absorber 4 and the through hole 33, there is a concern that the excrement absorbed and retained by the absorber 4 exudes to the outside through the first portion 31. Has been done.
In the form shown in FIG. 8 (f), the second outer layer sheet 3g is made of a base non-woven fabric 37 having irregularities on the surface, and the irregularities are formed on the non-skin facing surface (outer surface of the diaper 1) of the outer layer body 3. In that respect, it is different from the form shown in FIG. 8E, which does not substantially have such unevenness.
In the form shown in FIG. 8 (g), the stacking order in the laminated structure of the outer layer body 3 is opposite to that shown in FIG. 8 (f). 3 g of the outer layer sheet is composed of the melt blown layer 38. The first outer layer sheet 3f (base material non-woven fabric 37) has a through hole 33 penetrating the sheet 3f in the thickness direction at a position corresponding to the first portion 31 (sensor corresponding region 10), and the through hole 33. Is entirely covered with a second outer layer sheet 3g (melt blown layer 38) arranged on the non-skin facing surface side of the sheet 3f.
The morphology shown in FIGS. 8 (e) to 8 (g) also has the same effect as the morphology shown in FIG. 8 (d).

The absorbent articles of the present invention broadly include articles used for absorbing body fluids (urine, loose stools, menstrual blood, sweat, etc.) discharged from the human body, and in addition to the disposable diapers described above, for example, menstrual napkins. Includes sanitary shorts, incontinence pads and the like.

Although the present invention has been described above based on the embodiment, the present invention can be appropriately modified without being limited to the embodiment.
For example, in the pants-type disposable diaper 1B, as shown in FIG. 5, the outer packaging material 30 has a continuous shape such as an hourglass covering the ventral side A, the inseam B, and the back side C, but instead of this, the outer packaging material has a continuous shape. Reference numeral 30 denotes a ventral outer packaging material arranged on the ventral side of the wearer, an inseam outer packaging material arranged on the inseam of the wearer, and a dorsal outer packaging material arranged on the back side of the wearer. The members may be joined at the end of the vertical direction X. The outer packaging materials may have the same or different configurations from each other. Alternatively, the outer packaging material 30 may have the ventral outer packaging material and the dorsal outer packaging material, but may not have the inseam outer packaging material, and the absorbent main body 5 may be bridged and fixed to both outer packaging materials.
All the parts of only one embodiment described above can be mutually used as appropriate.

1 Absorbent article 1A Expandable disposable diaper (expandable absorbent article)
1B Pants-type disposable diaper (pants-type absorbent article)
2 Inner layer 3 Outer layer 3a, 3b, 3c, 3d, 3e, 3f, 3g Outer layer sheet 30 Outer packaging material 31 First part 32 Second part 33 Through hole 35 Moisture permeable film 36, 37 Base material Non-woven fabric 38 Melt blown layer 4 Absorber 40 Absorbent core 41 Core wrap sheet 42 Absorber width area 5 Absorbent body 6 Leakage-proof cuff 7 Fastening tape 8 Fastening member 10 Sensor-corresponding area 20 Sensor 21 Housing X Vertical Y Horizontal A Ventral side B Inseam C Dorsal WH Waist opening LH Leg opening

Claims (13)

It has a vertical direction extending from the ventral side of the wearer to the dorsal side via the crotch part and a lateral direction orthogonal to the vertical direction, and the crotch part arranged in the crotch part and the wearer's lower part than the crotch part. It is divided into a ventral part arranged on the ventral side and a dorsal part arranged on the dorsal side of the wearer rather than the inseam. An absorbent article with an outer layer located farther from the wearer's skin than the body.
A sensor-corresponding region to which the sensor can be attached is provided on a part of the non-skin facing surface of the outer layer body forming the outer surface of the inseam so as to include a region overlapping the absorber in a plan view. The sensor includes a sensor capable of detecting the temperature of a portion of the absorbent article that overlaps the sensor in a plan view.
In the outer layer body of the inseam, the first portion in which the sensor-corresponding region is provided on the non-skin facing surface is compared with the second portion in which the sensor-corresponding region is not provided on the non-skin facing surface. An absorbent article with high thermal conductivity. The absorbent article according to claim 1, wherein the first portion is thinner than the second portion. The first portion comprises one or more metallic materials selected from the group consisting of aluminum, tin, chromium, nickel, gold, silver, copper, germanium, titanium oxide, zinc oxide, nitrous oxide and magnesium fluoride. , The absorbent article according to claim 1 or 2. The absorbent article according to any one of claims 1 to 3, wherein the first portion has liquid impermeability and is more breathable than the second portion. The absorbent article of claim 4, wherein the first portion comprises a melt blown layer. The absorbency according to any one of claims 1 to 5, wherein the second portion comprises at least one selected from the group consisting of air-through non-woven fabrics, spunbonded non-woven fabrics and spunbond-melt blown-spunbonded non-woven fabrics. Goods. The absorbent article according to any one of claims 1 to 6, wherein the presence of the sensor-corresponding region is visually recognizable. The absorbent article is provided on both side edges of the dorsal side along the longitudinal direction and on the ventral side facing the non-skin surface, and the fastening tape can be fastened. Equipped with members
The absorbent article according to any one of claims 1 to 7, wherein the sensor-corresponding region is unevenly distributed in the center of the inseam in the lateral direction. The sensor-corresponding region is unevenly distributed in a region sandwiched between a pair of virtual straight lines extending in the vertical direction through both ends in the horizontal direction of the portion of the absorber having the maximum length in the horizontal direction. The absorbent article according to claim 8. In the sensor-compatible region, a portion located closer to the ventral side of the boundary with the center of the absorbent article in the vertical direction as a boundary is the ventral sensor-compatible region, and the dorsal portion of the boundary. The absorbent article according to claim 8 or 9, wherein the portion located closer to the back side sensor corresponds to the area corresponding to the dorsal sensor, which satisfies all of the following (1) to (3).
(1) Area of the area corresponding to the ventral sensor> 0
(2) Area of the area corresponding to the dorsal sensor ≥ 0
(3) Area of the ventral sensor compatible area> Area of the dorsal sensor compatible area The absorbent article is a pants-type absorbent article in which a waist opening and a leg opening are formed by joining both side edges of the ventral portion and the dorsal portion along the longitudinal direction. ,
The absorbent article according to any one of claims 1 to 7, wherein the sensor-corresponding region is unevenly distributed in the center of the inseam in the vertical direction. In the sensor-compatible region, a portion located closer to the ventral side of the boundary with the center of the absorbent article in the vertical direction as a boundary is the ventral sensor-compatible region, and the dorsal portion of the boundary. The absorbent article according to claim 11, wherein the portion located closer to the back side sensor corresponds to the area corresponding to the dorsal sensor, which satisfies all of the following (1) to (3).
(1) Area of the area corresponding to the ventral sensor> 0
(2) Area of the area corresponding to the dorsal sensor ≥ 0
(3) Area of the ventral sensor compatible area> Area of the dorsal sensor compatible area The sensor-corresponding region is unevenly distributed in a region sandwiched between a pair of virtual straight lines extending in the vertical direction through both ends in the horizontal direction of the portion of the absorber having the maximum length in the horizontal direction. The absorbent article according to claim 11 or 12.

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