TW202233145A - Disposable diaper and change detection method for disposable diaper - Google Patents

Abstract

The present invention provides a disposable diaper (1) including an absorber (4) having the property of holding a liquid, the disposable diaper having a longitudinal direction (X) corresponding to a front-rear direction of a wearer and a lateral direction (Y) orthogonal to the longitudinal direction. The disposable diaper (1) is provided with a mark (30) placed on a non-skin-opposite surface. The absorber (4) includes a high-liquid-permeability portion (43) located in a portion overlapping the mark (30) and having higher liquid permeability than portions located on both sides of the overlapping portion in the lateral direction (Y). The mark (30) preferably indicates a position to which a urination sensor (20) detecting urination of the wearer is attached.

Description

Disposable diapers, and methods for detecting changes in disposable diapers

The present invention relates to a disposable diaper and a change detection method of the disposable diaper.

For the purpose of reducing the burden of nursing care, etc., there is known a technique for detecting urination of a wearer of a disposable diaper by a urination sensor and notifying it. As a method of detecting urination, for example, a method of detecting the temperature or humidity raised by urination is known. Furthermore, a sensor capable of sensing changes in temperature, humidity, etc. caused by excrement, and a disposable diaper equipped with the sensor are known. For example, Patent Document 1 describes a sensor that can be placed in or on an absorbent article such as a disposable diaper. The sensor is separable from the absorbent article and is configured to sense changes in state within the absorbent article. Patent Document 2 describes an absorbent article that includes a color change indicator and an optical sensor and is suitable for detecting color changes.

Moreover, as a disposable diaper, the thing provided with the absorber as a main liquid absorption part, and the outer layer sheet which forms the outer surface of this disposable diaper is known. The outer-layer sheet is arranged on the sheet member on the non-skin-facing surface of the absorber. For example, the applicant previously proposed a disposable diaper having, between the absorber and the outer sheet, a stretchable region in which there is an elastic member extending in the same direction in a state that can exhibit stretchability in the longitudinal direction; and a low The weight per unit area, wherein compared to the lateral sides of the absorbent body, the mass per unit area of the absorbent material is less in the central part of the lateral direction; and the stretchable area and the low unit area are viewed from a plan view. The area weight portion overlaps (Patent Document 3).

On the other hand, Patent Document 1 describes that an additional material is bonded to the inner or outer surface of the layer facing the clothing, thereby forming a bag for sensor arrangement. Moreover, in patent document 4, it is described that a sensor is directly attached to the non-skin facing surface side of an absorbent article, and it is fixed. In addition, Patent Document 5 proposes an absorbent article in which a sensor for detecting urination by a change in impedance can be freely attached to and detached from the outer surface side of the absorbent article, and an elastic member is provided at the free end. The two sheets are arranged on the non-skin facing surface side from the absorber of the absorbent article in a state where a part of the free end side overlaps each other to form the attachment portion of the sensor.

Absorbent articles such as disposable diapers generally include an absorbent body that absorbs and retains excretion such as urine, feces, menstrual blood, etc., an inner layer body such as a front sheet disposed on the side closer to the wearer's skin than the absorbent body, and an absorbent body. It consists of an outer layer body such as a back sheet on the side farther from the wearer's skin than the absorber. Patent Documents 6 and 7 describe improved techniques related to the outer layer. Specifically, Patent Document 6 describes that a transparent portion is formed in a part of the back sheet as an unfolded disposable diaper which can visually confirm the absorption state of excrement from the outside in a wearing state. The back sheet with the above-mentioned transparent portion is produced by partially embossing a microporous sheet produced from a molten mixture of a thermoplastic resin and a compound that is phase-separated below the crystallization temperature of the thermoplastic resin, and the transparent The part is the part that has been embossed. Moreover, patent document 7 describes using the back surface sheet which has a metal layer as an absorbent article which has a heat retention effect and the temperature of the part wetted by urination does not fall easily. According to the absorbent article described in Patent Document 2, the body heat reflected by the metal layer can maintain the temperature of the excrement absorbed and held by the absorber.

Also, a technique has been previously known in which a sensor for detecting temperature or humidity is installed in an absorbent article such as a disposable diaper in advance, based on the temperature of the inside of the absorbent article being worn, or the temperature provided by the sensor. Humidity information to detect whether the wearer excretes. For example, Patent Document 8 describes a diaper wetness reporting device using this technology.

Moreover, in Patent Document 9, it is described that the back sheet is provided so as to be located inward from both sides of the absorbent body, and the end surfaces of the front sheet are wound from the both sides of the absorbent body to the back side. And stick to the outer surface of the end of the back sheet, as an absorbent article with improved absorbency and air permeability. According to the absorbent article described in Patent Document 9, the size of the back sheet and the size of the portion where the end of the front sheet and the end of the back sheet overlap are set to the minimum necessary limits, so absorbency and air permeability are improved. .

prior art literature Patent Literature [Patent Document 1] Japanese Patent Laid-Open No. 2016-214903 [Patent Document 2] Japanese Patent Publication No. 2019-512676 [Patent Document 3] Japanese Patent Laid-Open No. 2020-103884 [Patent Document 4] Japanese Patent Laid-Open No. 2015-027391 [Patent Document 5] Japanese Patent Laid-Open No. 2015-027322 [Patent Document 6] Japanese Patent Laid-Open No. 10-85257 [Patent Document 7] Japanese Patent Laid-Open No. 2014-180461 [Patent Document 8] Japanese Patent Laid-Open No. 9-220259 [Patent Document 9] Japanese Patent Laid-Open No. 2005-65729

The present invention relates to a disposable diaper having a liquid-retaining absorber and having a longitudinal direction corresponding to the front-back direction of the wearer, and a transverse direction perpendicular to the longitudinal direction. It is preferable that a mark is marked on the non-skin facing surface of the said disposable diaper. It is preferable that the said absorber has the high liquid permeability|transmitting part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark.

The present invention relates to a disposable diaper which has a longitudinal direction corresponding to the front-rear direction of a wearer and a transverse direction perpendicular to the longitudinal direction, and includes a surface sheet located on the skin-opposite side and a non-skin-opposite side. An outer sheet, and a liquid-retaining absorber disposed between the surface sheet and the outer sheet. It is preferable that a mark is marked on the non-skin facing surface of the said disposable diaper. It is preferable that the said absorber has the high liquid permeability|transmitting part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark. It is preferable that the said outer sheet has a 1st nonwoven fabric as the outermost constituent material of a disposable diaper, and the 2nd nonwoven fabric arrange|positioned in the state partially or fully overlapped on the non-skin opposing surface side of the 1st nonwoven fabric. Preferably, in a part of the overlapping area where the first non-woven fabric and the second non-woven fabric overlap, the first non-woven fabric and the second non-woven fabric are not joined to form a sensor that can be arranged inside to detect changes that occur on the disposable diaper sensor bag. The above-mentioned overlapping area preferably has a fixed area formed by joining the first non-woven fabric and the second non-woven fabric in three directions around the sensor bag, and in the remaining one direction, the insertion of the above-mentioned sensor is formed. mouth. It is preferable that 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 bag is formed in the overlapping region.

Furthermore, the present invention relates to a method for detecting a change in a disposable diaper. In the above-mentioned change detection method, preferably, the above-mentioned sensor is disposed in the above-mentioned sensor pocket of the above-mentioned disposable diaper, and the change in the disposable diaper caused by the excretion of the wearer is detected by using the sensor.

The present invention relates to a disposable diaper, which has a longitudinal direction corresponding to the front-rear direction of the wearer and a transverse direction perpendicular to the longitudinal direction, and is provided with a crotch part arranged on the wearer's crotch, The lower part of the crotch is located on the ventral side of the wearer's ventral side, and is arranged on the back side of the wearer's back side rather than the lower crotch, and at least in the lower part of the crotch, an absorbent body having liquid retention properties, and the arrangement The outer layer is on the side farther from the wearer's skin than the absorber. It is preferable that a mark is marked on the non-skin facing surface of the said disposable diaper. It is preferable that the said absorber has the high liquid permeability|transmitting part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark. The above-mentioned disposable diaper is preferably provided with a sensor corresponding area on a part of the non-skin facing surface of the above-mentioned outer body forming the outer surface of the above-mentioned lower crotch, and the sensor corresponding area can be installed with a sensor, and The area|region which overlaps with the said absorber in planar view is included. The above-mentioned sensor preferably includes one that can detect the temperature of the portion of the disposable diaper that overlaps with the sensor in a plan view. In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, it is preferable that the thermal conductivity of the first part of the non-skin facing surface provided with the corresponding region of the sensor is higher than that of the first part of the non-skin facing surface that is not provided with the corresponding region of the sensor. 2 parts high.

The present invention relates to a disposable diaper, which has a longitudinal direction corresponding to the front-rear direction of the wearer and a transverse direction perpendicular to the longitudinal direction, and is provided with a crotch part arranged on the wearer's crotch, The lower part of the crotch is located on the ventral side of the wearer's ventral side, and is arranged on the back side of the wearer's back side rather than the lower crotch, and at least in the lower part of the crotch, an absorbent body having liquid retention properties, and the arrangement The outer layer is on the side farther from the wearer's skin than the absorber. It is preferable that a mark is marked on the non-skin facing surface of the said disposable diaper. It is preferable that the said absorber has the high liquid permeability|transmitting part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark. The above-mentioned disposable diaper is preferably provided with a sensor corresponding area on a part of the non-skin facing surface of the above-mentioned outer body forming the outer surface of the above-mentioned lower crotch, and the sensor corresponding area can be installed with a sensor, and The area|region which overlaps with the said absorber in planar view is included. It is preferable that the said sensor contains the thing which can detect the humidity of the part which overlaps with this sensor in the top view of the said disposable diaper. In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, it is preferable that the air permeability of the first part of the non-skin-facing surface provided with the sensor-corresponding area is higher than that of the non-skin-facing surface that is not provided with the sensor-corresponding area. 2 parts high. In other words, it is preferable that the ventilation resistance of the first part is lower than that of the second part. The first part preferably has liquid impermeability or liquid impermeability.

The present invention relates to an absorbent article comprising a surface sheet located on the skin-opposing surface side, an outer sheet located on a non-skin-opposing surface side, and a surface sheet disposed between the surface sheet and the outer sheet absorber. As the outermost constituent material of the absorbent article, the outer sheet preferably has a first nonwoven fabric and a second nonwoven fabric arranged in a state of being partially or entirely overlapped on the non-skin-facing surface side of the first nonwoven fabric. Preferably, in a part of the overlapping area where the first non-woven fabric and the second non-woven fabric overlap, the first non-woven fabric and the second non-woven fabric are not joined to form a sensor that can be arranged inside to detect changes that occur on the absorbent article. sensor bag. The above-mentioned overlapping area preferably has a fixed area formed by joining the first non-woven fabric and the second non-woven fabric in three directions around the sensor bag, and in the remaining one direction, the insertion of the above-mentioned sensor is formed. mouth. It is preferable that 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 bag is formed in the overlapping region.

Moreover, this invention relates to the change detection method of an absorbent article. In the above-mentioned change detection method, preferably, the above-mentioned sensor is disposed in the above-mentioned sensor bag of the above-mentioned absorbent article, and the above-mentioned sensor is used to detect the change that occurs in the absorbent article with the excretion of the wearer.

Furthermore, the present invention relates to an absorbent article having a longitudinal direction extending from the wearer's abdomen to the back through the crotch portion, and a transverse direction perpendicular to the longitudinal direction, divided into a crotch portion arranged in the crotch portion, It is arranged on the ventral side of the wearer's ventral side relative to the lower part of the crotch, and is arranged on the back side of the wearer's back side relative to the lower part of the crotch, and at least the lower part of the crotch has the ability to absorb and retain body fluid body, and an outer layer body disposed on the side farther from the wearer's skin than the absorbent body. The above-mentioned absorbent article is preferably provided with a sensor-corresponding area on a part of the non-skin-facing surface of the above-mentioned outer layer that forms the outer surface of the above-mentioned lower crotch, and the sensor-corresponding area can be installed with a sensor, and The area|region which overlaps with the said absorber in planar view is included. The above-mentioned sensor preferably includes one capable of detecting the temperature of the portion of the above-mentioned absorbent article overlapping the sensor in a plan view. In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, it is preferable that the thermal conductivity of the first part of the non-skin facing surface provided with the corresponding region of the sensor is higher than that of the first part of the non-skin facing surface that is not provided with the corresponding region of the sensor. 2 parts high.

Alternatively, the above-mentioned sensor preferably includes one capable of detecting the humidity of the portion of the absorbent article overlapping the sensor in a plan view. In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, it is preferable that the air permeability of the first part of the non-skin-facing surface provided with the sensor-corresponding area is higher than that of the non-skin-facing surface that is not provided with the sensor-corresponding area. 2 parts high. In other words, it is preferable that the ventilation resistance of the first part is lower than that of the second part. In one Embodiment of the absorbent article of this invention, the 1st part has liquid impermeability or liquid impermeability.

When a sensor for detecting excretion such as urination is installed in a disposable diaper, it is desirable to provide the diaper with a structure that allows the sensor to have a good sensitivity, and to easily attach the sensor to a position where the sensor has a good sensitivity. The absorbent articles described in Patent Documents 1 and 2 are insufficient in that the sensitivity of the sensor is good, but the detection of excretion such as urination with good accuracy is insufficient. The technique described in Patent Document 3 does not pay much attention to attaching external members such as sensors to the surface of the disposable diaper.

The first embodiment of the present invention relates to a disposable diaper in which an external member can be easily mounted on the outer surface of the disposable diaper, and when the external member is a sensor, the sensitivity of the sensor is good .

In addition, the method of disposing a sensor on the skin-facing side of the disposable diaper, which is an absorbent article, to detect urination or defecation, because the sensor is in direct contact with the excrement, it is necessary to wash the sensor when reusing it. clean, so there are hygienic problems. The method of directly attaching the sensor to the non-skin-opposite side of the disposable diaper causes vibration along with the movement of the wearer, and the adhesive force decreases due to repeated use, so there is a sensor self-absorbable article. Risk of peeling. The installation method of the sensor in Patent Document 1 also has the risk of the sensor falling out of the bag due to the posture or movement of the wearer. The techniques of Patent Documents 4 and 5 still have room for improvement in the prevention of accidental detachment of the sensor and the ease of installation of the sensor.

The 2nd - 6th embodiment of this invention is related with the change detection method of an absorbent article and an absorbent article which can solve the problem to be solved by the said prior art.

In addition, in order to install a sensor for detecting temperature or humidity in the absorbent article and accurately detect whether the wearer has excreted or not, it is necessary to increase the sensitivity of the sensor. Moreover, in order to realize the high sensitivity of the sensor, it is not only necessary to improve the detection performance of the sensor itself, but also to design the absorbent article for installing the sensor to improve the detection sensitivity of the sensor. As an ingenious design on the side of the absorbent article, for example, when a temperature sensor is attached to the outer layer body that forms the outer surface of the absorbent article, in order to pass the heat generated by the excrement absorbed and retained by the absorber through the outer layer body It is possible to improve thermal conductivity by making the thickness of the outer layer thinner in order to quickly transfer it to the temperature sensor.

Furthermore, in addition to the technology described in Patent Document 9, for example, a technology using a sensor for detecting temperature or humidity is also known. The high sensitivity of the detector is indispensable. Moreover, in order to realize the high sensitivity of the sensor, it is not only necessary to improve the detection performance of the sensor itself, but also to design the absorbent article for installing the sensor to improve the detection sensitivity of the sensor. As an ingenious design on the side of the absorbent article, for example, when a humidity sensor is installed on the outer layer body forming the outer surface of the absorbent article, in order to pass the moisture caused by the excrement absorbed and retained by the absorbent body through the outer layer Since the body is quickly transferred to the temperature sensor, it can be considered to make the thickness of the outer body thinner to improve the air permeability, that is, reduce the air permeability resistance.

However, in the absorbent article, the outer layer body, which is a member disposed on the side farther from the wearer's skin than the absorber, has the function of preventing the excrement absorbed and held by the absorber from leaking to the outside. If such leakage prevention is expected If the thickness of the functional outer layer is uniformly thin, the leak-proof function of the outer layer will be damaged, and there is a possibility that the excrement will leak through the outer layer in the thickness direction to the outside. In addition, the exudation of excrement through such an outer layer may cause problems such as contamination of the clothes layered on the absorbent article.

Seventh and eighth embodiments of the present invention provide a technique for reducing the risk of exudation of excrement and achieving high sensitivity of the sensor in an absorbent article to which the sensor is attached.

Hereinafter, the absorbent article of the present invention will be described based on its preferred embodiment. In the description of the following drawings, the same or similar parts are marked with the same or similar symbols. The drawings are basically patterns, and the proportions of each dimension may be different from reality.

1 to 4 show an unfolded disposable diaper (hereinafter, simply referred to as "diaper 100") as a first embodiment of the present invention. 3 and 4 illustrate the diaper 100 and the urination sensor 80 attached to the diaper 100 . For ease of illustration, the urination sensor 80 is shown in a perspective state in FIG. 4 . As shown in FIG. 1, the diaper 100 has the marking 300 on the outer surface S1 of the diaper. In this embodiment, reference numeral 300 indicates the installation position of the external attachment member. The external component of this embodiment is a urination sensor 80 for detecting urination of the wearer. The mark 300 in the present embodiment indicates the installation position of the urination sensor 80, and is therefore marked on the outer surface S1 of the diaper before urination. That is, unlike an indicator that changes color upon contact with urine, the marking 300 can be recognized regardless of whether or not it is in contact with urine. In other words, the mark 300 is an indication that no color change occurs on the outer surface S1 of the diaper before and after urination.

The urination sensor 80 includes a sensor capable of detecting either or both of the temperature and humidity of the portion of the diaper 100 overlapping the sensor 80 in plan view. That is, the urination sensor 80 includes either or both of a temperature sensor and a humidity sensor. The urination sensor 80 may include a sensor for detecting target elements other than temperature and humidity. For example, a urination sensor using a change in impedance caused by urination, a urination sensor using an ultrasonic method, or the like can be used.

The urination sensor 80 of the present embodiment includes a temperature sensing portion (not shown) for detecting temperature, a humidity sensing portion (not shown) for detecting humidity, and a battery (not shown) for supplying power to these sensing portions , and a casing 81 as a box housing the same. The housing 81 has a power button (not shown) for on/off operation of the urination sensor 80 . The urination sensor 80, more specifically the housing 81, has a sensor outer surface 82, and the sensor outer surface 82 is positioned opposite to the diaper 100 in a state where the urination sensor 80 is attached to the diaper 100. The opposite side of the side of the diaper (the side of the side in contact with the outer surface of the diaper 100). The sensor outer surface 82 can also have an indication function of changing the display color or the blinking pattern according to the operating state of the urination sensor 80 . The urination sensor 80 is turned on by pressing and operating the above-mentioned power button, and detects the temperature, humidity and other physical or chemical changes of the diaper 100 in a specific period, and the The changes are sent to a communication terminal device (not shown) located at a distance from the urination sensor 80 . The above-mentioned communication terminal device is, for example, a smart phone, a tablet, or a personal computer.

The casing 81 has a specific thickness in order to incorporate the above-described sensing portion and the like. The shape of the urination sensor 80 is not particularly limited. In this embodiment, as shown in FIGS. 1 and 4 , it has a substantially circular shape in plan view, and is a curved shape without corners.

When the shell 81 is attached to the outer surface S1 of the diaper 100, the surface in contact with the outer surface S1 has an engaging portion (not shown), and is fixed to a member constituting the outer surface S1 through the engaging portion (forming the outer layer sheet 26 ). non-skin-opposite components). The above-mentioned buckling portion can be, for example, a male material of a mechanical buckling piece.

The diaper 100 has a ventral portion A that is placed on the wearer's ventral side when worn, a back portion B that is placed on the back of the wearer, and a crotch portion C that is placed on the crotch portion. That is, the ventral part A and the dorsal part B extend in the front and rear of the lower part C of the crotch. The diaper 100 has a longitudinal direction X extending from the wearer's belly to the back through the crotch, corresponding to the front and rear directions of the wearer, and a transverse direction Y perpendicular to the longitudinal direction X. The longitudinal direction X is the direction from the front side of the wearer to the back side when wearing, and in the disposable diaper, it is the direction from the abdominal part A through the lower crotch part C to the back part B. The transverse direction Y is the direction orthogonal to the longitudinal direction X. The lower crotch portion C has an excretory portion opposing portion (not shown) that is arranged to face the excretory portion of the wearer when the diaper 100 is worn.

The outline of the diaper 100 in the unfolded and extended state of this embodiment is shown in FIG. 2 , the central part of the longitudinal direction X is retracted, and the two end sides of the longitudinal direction X are protruded to the outer side of the lateral direction Y than the retracted part. In other words, the diaper 100 of the present embodiment has wide portions at both ends of the longitudinal direction X, respectively, and between the two wide portions in the longitudinal direction X has an inwardly narrowed portion with a narrower width than the wide portion. Among these two wide-width portions, when the diaper 100 is worn, the one disposed on the wearer's ventral side is the ventral portion A, and the one disposed on the wearer's back side is the backside portion B (refer to FIG. 2 ). Moreover, the said indentation part is the lower part C of a crotch.

In this specification, the so-called "expanded and stretched state" means that the diaper 100 (absorbent article) is spread in a planar shape to be in an expanded state, and the diaper 100 (absorbent article) in the expanded state is The elastic member is elongated to the designed size (the same size as the size when the elastic member is spread out in a planar shape in a state where all influence of the elastic member is excluded). In addition, the "skin-opposing surface" refers to the surface facing the wearer's skin when the diaper is worn when focusing on the diaper (absorbent article) or its constituent members (for example, the absorber 4), and the "non-skin-opposing surface" refers to wearing the diaper When facing the side opposite to the wearer's skin. That is, the skin-opposing surface is the surface that is relatively close to the wearer's skin, and the non-skin-opposing surface is the surface that is relatively farther from the wearer's skin. Moreover, the outer surface S1 of the diaper 100 is the non-skin facing surface of the diaper 100 . "When wearing" and "wearing state" refer to the state of wearing the diaper while maintaining the proper wearing position.

As shown in FIG. 4, the diaper 100 is bounded by a longitudinal center line CLx extending in the lateral direction, and has a front body F arranged on the front side (abdominal side) of the wearer when worn, and a front body F arranged on the back side ( rear side) back body piece R. The vertical center line CLx is an imaginary straight line extending along the horizontal direction Y by halving the total length of the vertical direction X of the diaper 100 in the unfolded and extended state as shown in FIG. 4 . For convenience of description, the illustration of the front body F, the rear body R, and the longitudinal center line CLx is omitted in FIG. 2 .

As shown in FIG. 3 , the diaper 100 is provided with a front sheet 21 for forming a liquid-permeable surface facing the skin, a leakage preventing sheet 23 for forming a liquid-impermeable (including water repellency) non-skin facing surface, and a The liquid-retaining absorber 4 provided between the surface sheets 21 and the leak-proof sheet 23 constitutes the absorbent body 5 . For the convenience of description, in FIG. 3 , the following leakage-preventing flange 6 is shown in an erected state. The surface sheet 21 and the leak-proof sheet 23 are respectively larger in size than the absorber 4 , and extend outward from the outer peripheral edge of the absorber 4 . Both end edges in the longitudinal direction of the leak-proof sheet 23 in the present embodiment substantially correspond to both end edges in the longitudinal direction of the diaper 100 .

The diaper 100 is provided with the liquid-retaining absorber 4 . The absorber 4 shown in FIG. 2 is arrange|positioned so that the longitudinal direction may correspond to the longitudinal direction X of a diaper, and it is arrange|positioned so that it may extend from the abdominal part A to the back part B via the crotch lower part C. Both side edges in the longitudinal direction of the absorber 4 are located inside of the both side edges in the longitudinal direction X of the diaper 100 .

The diaper 100 is provided with a pair of leak-proof cuffs 6 and 6 arranged along both sides in the longitudinal direction X of the absorbent body 5 . The leak-proof cuff 6 includes a linear elastic member 61 for cuff formation, and a water-repellent and air-permeable cuff-forming sheet 60 . The leakage-preventing cuff 6 rises toward the wearer's skin side at least at the lower crotch portion C by the contraction of the cuff-forming elastic member 61, thereby preventing excrement such as urine from flowing out to the outside in the lateral direction Y.

As shown in FIG. 2, the diaper 100 is provided with a pair of hook-and-loop fasteners 7 and 7 in both side edge parts along the longitudinal direction X of the back side part B. As shown in FIG. Each hook-and-loop fastener 7 is provided so as to extend from both side edges of the back side portion B along the longitudinal direction X to the outer side of the transverse direction Y. As shown in FIG. One end of the inner side of the transverse direction Y of each hook and loop fastener 7 is fixed to the sheet member constituting the diaper 100, preferably between the sheet members constituting the diaper 100, for example, between the leak-proof sheet 23 and the outer sheet 26 (not shown). The diaper 100 of this embodiment is provided with the fastening member 78 which can attach and detach the hook-and-loop fastener 7 to the non-skin facing surface of the abdominal part A. By fixing the hook-and-loop fastener 7 to the fixing member 78, a waist opening WH for the wearer's body to pass through, and a pair of leg openings LH and LH for the wearer's lower limbs to pass through (see FIG. 1 ) are formed. ).

As shown in FIG. 3 , the diaper 100 of the present embodiment includes an outer layer sheet 26 arranged on the non-skin-facing surface side of the absorbent body 5 , that is, the non-skin-facing side of the leak-proof sheet 23 face side. The outer sheet 26 forms the outer surface S1 (non-skin-facing surface) of the diaper 100 . The outer layer sheet 26 of this embodiment extends from the abdominal part A to the back part B via the lower crotch part C in the longitudinal direction X. As shown in FIG. The outer layer sheet 26 forms the outer shape of the diaper 100 in the unfolded and stretched state, and the periphery of the outer layer sheet 26 forms the contour lines of the abdominal part A, the lower crotch part C, and the back part B.

The outer layer sheet 26 extends from both side edges of the absorbent body 4 along the longitudinal direction X to the outside in the lateral direction Y, and is formed together with the leakage preventing sheet 23 and the cuff forming sheet 60 constituting the leakage preventing cuff 6 . Flank SF. The side flap part SF is a part formed by the sheet member extended to the outer side of the lateral direction Y from the both side edges along the longitudinal direction X of the absorber 4 . The sheet member constituting the side flaps SF extends from the abdominal part A to the back part B through the lower crotch part C, and extends from the both side edges of the absorber 4 to the outside of the lateral direction Y, respectively. They are joined to each other by known joining means such as sealing and ultrasonic sealing. The mark 300 (refer FIG. 1) is attached|subjected to the outer layer sheet 26 which forms the outer surface S1 (non-skin facing surface) of the diaper 100. In this embodiment, the mark 300 has a star-shaped plan view shape.

In the diaper 100 of the present embodiment, as shown in FIG. 2 , on both sides of the diaper 100 along the longitudinal direction X, specifically a pair of side flaps SF, SF, respectively extend along the longitudinal direction X through the lower crotch portion C with The elastic member 91 for leg gathers formation (henceforth "leg elastic member 91") is arrange|positioned in the extended state. Due to the contraction of the elastic members 91, leg gathers are formed in the left and right parts arranged around the wearer's legs, that is, on both sides in the longitudinal direction X of the diaper 100. In this embodiment, the leg elastic member 91 is fixed between the sheet|seat 60 for burring formation of the side flap part SF and the leak-proof sheet|seat 23 in the extended state along the longitudinal direction X. Moreover, in the diaper 100 of this embodiment, as shown in FIG. 2, the elastic member 92 for waist gathers formation is arrange|positioned in the extended state to extend along the horizontal direction Y outside the vertical direction X of the absorber 4 of the back side part B (Hereinafter, also referred to as "waist elastic member 92"). By the contraction of the elastic member 92 , waist gathers are formed at the portion arranged on the wearer's waist. In this embodiment, the waist elastic member 92 is fixed between the above-mentioned cuff forming sheet 60 and the leakage preventing sheet 23 in an extended state along the lateral direction Y.

As shown in FIG. 3 , the absorber 4 includes an absorptive core 40 having absorbing performance and a liquid-permeable core wrapping material 41 covering the surface of the absorptive core. The absorptive core 40 is constituted by including wood pulp, hydrophilic fibers such as synthetic fibers subjected to hydrophilization treatment, or water-absorbing materials such as water-absorbing polymers. By including the water-absorbing material, it has the performance of absorbing and retaining liquids such as urine.

As shown in FIG. 4 , the absorber 4 has a high liquid permeability portion 43 having a higher liquid permeability than the portion located on both sides of the lateral direction Y of the portion in the portion overlapping with the mark 300 . Hereinafter, the portions located on both sides in the lateral direction Y of the high liquid permeation portion 43 are also referred to as “low liquid permeation portion 44 ”. That is, the high liquid permeation part 43 is located between the low liquid permeation parts 44 in the lateral direction Y (between the pair of low liquid permeation parts 44 , 44 ). The term "high liquid permeability" specifically means that the time required for liquids such as urine to pass through the absorber 4 from the skin-opposing surface toward the non-skin-opposing surface is short, that is, the liquid permeation speed is high.

The high-liquid-permeable part 43 of this embodiment is a through-hole in which the forming material of the absorptive core 40 does not exist. In this way, the high liquid permeation portion 43 can be a portion where the basis weight of the above-mentioned forming material is lower than that of the other portions. "Other parts" are parts other than the high liquid permeation part 43 , for example, the low liquid permeation part 44 . The highly liquid-permeable portion 43 shown in FIG. 3 has a lack of a material for forming the absorptive core 40 in the entire thickness direction of the absorptive core 40, and a space (hereinafter, also referred to as a "liquid-permeable space") where the material does not exist. . In other words, the high liquid permeation portion 43 is a through hole penetrating the absorptive core 40, and the basis weight of the forming material of the absorptive core 40 is 0 g/m ² . As described below, the high liquid permeability portion 43 may not be a through hole, but may be a low basis weight portion where a material for forming the absorptive core 40 is present. In this way, since the high liquid permeation portion 43 has a liquid permeation space, the thickness of the portion formed of the material for forming the absorptive core 40 is smaller than that of the liquid permeation portion 44 . That is, in the high-liquid-permeable part 43, the lower liquid-permeable part 44 is small in the part which hold|maintains liquids, such as urine, in the thickness direction Z of the diaper 100. Therefore, the liquid can pass through the high liquid permeation part 43 more quickly than the low liquid permeation part 44, so the urine (liquid) excreted on the surface sheet 21 is preferentially concentrated in the high liquid permeation part 43, and it is easy to It passes through this high liquid permeation part 43 rapidly toward the non-skin opposing surface side of the absorber 4.

As shown in FIG. 4, the absorber 4 has the high liquid permeation part 43 in the part which overlaps with the mark 300 marked on the non-skin facing surface of the diaper 100. In this embodiment, the mark 300 indicates the installation position of the urination sensor 80 for detecting the urination of the wearer. If the urination sensor 80 is installed in a position overlapping with the mark 300 on the non-skin facing surface of the diaper 100, the urination sensor 80 overlaps with the high liquid permeation portion 43 in plan view. As described above, the high liquid permeation portion 43 has a lower liquid permeation rate such as urine. The liquid permeation portion 44 is higher than the liquid permeation portion 44 . Therefore, the urination sensor 80 can be installed in a position overlapping the high liquid permeation portion 43 , so that it can be quickly and accurately Physical changes such as temperature or humidity caused by the liquid can be well detected, thereby improving the sensor's sensitivity to urination. Thereby, even if a plurality of urinations occur, each urination can be easily detected. Moreover, since the mark 300 on the skin-opposing surface (outer surface S1) of the diaper 100 becomes a mark, the attachment position of the attachment member, such as the urination sensor 80, can be grasped easily, and this attachment member can be attached easily.

From the viewpoint of further improving the sensitivity of the sensor to urination, the mark 300 is preferably located at the center of the lateral direction Y of the lower part C of the crotch. According to this configuration, since the urination sensor 80 is attached to a position closer to the wearer's excretory portion, urination can be detected more quickly. The center of the transverse direction Y of the lower part of the crotch C is the area in the center when the full width of the transverse direction Y of the lower part of the crotch C is divided into three equal parts and divided into three areas. The full width of the lateral Y of the lower part of the crotch C is the maximum length of the lateral Y of the lower part of the crotch. From the same viewpoint as the above-mentioned viewpoint, the high liquid permeation portion 43 is preferably located at the center of the lateral direction Y of the lower portion C of the crotch, similarly to the mark 300 .

From the same viewpoint as above, the mark 300 is preferably located at the front body F, and more preferably at the lower crotch portion C of the front body F. As shown in FIG. From the same viewpoint as the above-mentioned viewpoint, the high liquid permeation portion 43 is preferably located in the front body F, more preferably at the lower crotch portion C of the front body F, similarly to the mark 300 . The distance between the high liquid permeation portion 43 and the longitudinal centerline CLx is preferably within the same range as the distance between the mark 300 and the longitudinal centerline CLx.

From the viewpoint of further improving the liquid permeability and securing the liquid retention of the absorber 4 more reliably, the size of the high liquid permeation portion 43 is preferably within the following range. The area of the high liquid permeation portion 43 is preferably 0.05% or more, more preferably 0.1% or more, more preferably 10% or less, more preferably 7% or less, and more preferably 7% or less with respect to the area of the absorbent core 40 . Preferably it is 0.05% or more and 10% or less, more preferably 0.1% or more and 7% or less. The maximum length L1 (refer to FIG. 2 ) in the longitudinal direction X of the high liquid permeability portion 43 is preferably 1.5% or more, and more preferably 1.5% or more of the total length L5 in the longitudinal direction X (refer to FIG. 2 ) of the absorbent core 40 (L1/L5). 3% or more, and preferably 20% or less, more preferably 10% or less, and more preferably 1.5% or more and 20% or less, more preferably 3% or more and 10% or less. The maximum length W1 (refer to FIG. 2 ) of the transverse direction Y of the high liquid permeability portion 43 is preferably 3% or more relative to the maximum length W5 (refer to FIG. 2 ) of the transverse direction Y of the absorbent core 40 (W1/W5), and more It is preferably 5% or more, more preferably 40% or less, more preferably 30% or less, and more preferably 3% or more and 40% or less, more preferably 5% or more and 30% or less.

The maximum length L1 (refer to FIG. 2 ) of the longitudinal direction X of the high liquid permeation portion 43 is preferably 15 mm or more, more preferably 20 mm or more, and more preferably 50 mm or less, more preferably 40 mm or less, and more Preferably, it is 15 mm or more and 50 mm or less, and more preferably 20 mm or more and 40 mm or less. The maximum length W1 (refer to FIG. 2 ) of the transverse direction Y of the high liquid permeation portion 43 is preferably 15 mm or more, more preferably 20 mm or more, and more preferably 50 mm or less, more preferably 40 mm or less, and more Preferably, it is 15 mm or more and 50 mm or less, and more preferably 20 mm or more and 40 mm or less.

As shown in FIG. 2 , the diaper 100 of the present embodiment has an elongated high liquid permeation portion 45 which is adjacent to the high liquid permeation portion 43 in the longitudinal direction X and extends along the longitudinal direction X. As shown in FIG. The elongated high liquid-permeable portion 45 is a part of the absorbent core 40 whose basis weight is lower than that on both sides of the transverse direction Y, and the width of the transverse direction Y is higher than that of the narrower portion of the liquid-permeable portion 43 . The elongated high liquid permeability portion 45 is continuous with the high liquid permeability portion 43 in the longitudinal direction X. As shown in FIG. Compared with the low liquid permeation part 44 , urine (liquid) can pass through the high liquid permeation part 43 more quickly, so the urine excreted on the surface sheet 21 is preferentially concentrated in the high liquid permeation part 43 . The urine concentrated in the high liquid permeation portion 43 spreads in the longitudinal direction X along the elongated high liquid permeation portion 45 with a narrow width, so that the urine (liquid) in the high liquid permeation portion 43 can be made in the plane direction of the absorbent body 4 Move quickly. Therefore, the burden on the wearer's skin due to the partial concentration of urine in the absorber 4 can be reduced, and the second and subsequent urination can be detected with higher accuracy.

The elongated high-liquid-permeable portion 45 is a portion where the basis weight of the material forming the absorbent core is higher than that of the portion other than the liquid-permeable portion 43 . The elongated high liquid-permeable portion 45 may be a portion where the forming material of the absorbent core 40 does not exist, that is, a through groove (slit), or may be a low basis weight portion where the forming material is present. From the viewpoint of further diffusing urine from the high liquid permeation part 43 in the longitudinal direction X, the elongated high liquid permeation part 45 preferably has a basis weight of a material forming the absorbent core less than or equal to the high liquid permeation part 43 . For example, when the high liquid permeability portion 43 is a low basis weight portion of the material forming the absorbent core, the elongated high liquid permeability portion 45 preferably has a lower basis weight of the forming material than the high liquid permeability portion 43 . In addition, when the high liquid permeation portion 43 has no through-holes for the forming material of the absorbent core, it is preferable that the elongated high liquid permeation portion 45 also does not have through-holes for the forming material.

When the high liquid permeation part 43 and the elongated high liquid permeation part 45 are respectively low basis weight parts of the forming material of the absorbent core, the urine in the high liquid permeation part 43 diffuses more quickly in the longitudinal direction X. From a viewpoint, the basis weight of the material for forming the absorbent core 40 in the elongated high liquid permeability portion 45 is preferably 80% or less relative to the basis weight of the material for forming the absorbent core 40 in the high liquid permeability portion 43 , more preferably 70% or less, more preferably 0% or more, more preferably 10% or more, and more preferably 0% or more and 80% or less, more preferably 10% or more and 70% or less. The basis weight of the material forming the absorbent core 40 in the elongated high liquid permeation portion 45 is preferably 0 g/m ² or more, more preferably 10 g/m ² or more, from the same viewpoint as the above-mentioned viewpoint. , preferably 300 g/m ² or less, more preferably 200 g/m ² or less, and preferably 0 g/m ² or more and 300 g/m ² or less, more preferably 10 g/m ² or more and 200 g /m ² or less.

From the viewpoint of more rapidly diffusing urine in the high liquid permeation portion 43 in the longitudinal direction X, the total length L3 (see FIG. 2 ) of the high liquid permeation portion 43 and the longitudinal direction X of the elongated high liquid permeation portion 45 is relative to the absorbency The longitudinal direction X total length L5 of the core body 40 (refer to FIG. 2 ) (L3/L5) is preferably 1% or more, more preferably 5% or more, and preferably 95% or less, more preferably 90% or less, and , preferably 1% or more and 95% or less, more preferably 5% or more and 90% or less. From the viewpoint of further diffusing the urine concentrated in the high liquid permeation portion 43 through the elongated high liquid permeation portion 45 , the width W3 (refer to FIG. 2 ) of the elongated high liquid permeation portion 45 is relative to the width W3 (refer to FIG. 2 ) of the lateral direction Y of the high liquid permeation portion 43 The maximum length W1 (W3/W1) is preferably 2% or more, more preferably 5% or more, and preferably 75% or less, more preferably 50% or less, and preferably 2% or more and 75% or less , more preferably 5% or more and 50% or less.

The absorber 4 of the present embodiment has an elongated high liquid permeation part 45 at the front and rear of the vertical direction X of the high liquid permeation part 43 (the ventral part A side and the back part B side). Instead of this, the elongated high liquid permeation part 45 may be provided only on the ventral part A side of the longitudinal direction X of the high liquid permeation part 43 , and the long and thin high liquid permeation part 45 may be provided only on the back side B side of the longitudinal direction X of the high liquid permeation part 43 . The elongated high liquid permeation portion 45 is formed. From the viewpoint of further capturing the excreted urine at a position other than the high liquid permeation part 43, the longitudinal direction X of the long and thin high liquid permeation part 45b located on the back part B side with the high liquid permeation part 43 as a boundary is preferable The length is longer than the elongated high liquid permeation part 45a which is located on the ventral part A side with the high liquid permeation part 43 as a boundary.

The plan view shape of the high liquid permeation portion 43 is not particularly limited, and may be the same shape as the shape of the following reference numeral 300 .

Another embodiment of the high liquid permeation part 43 of this invention is shown in FIG.5(a) and (b). In FIG.5(a) and (b), the same code|symbol is attached|subjected to the same structure as the embodiment shown in the said FIG. 1-FIG. 4. FIG. Regarding points not particularly described in this figure, the above-mentioned descriptions regarding the embodiments shown in FIGS. 1 to 4 are applied as appropriate.

The high liquid permeation part 43a shown in FIG.5(a) is a low basis weight part in which the formation material of the absorptive core 40 exists. The high liquid permeation portion 43a is a bottomed groove having an opening on the skin-opposing surface side. That is, the highly liquid-permeable part 43a of this embodiment has the space (liquid permeation space) in which the formation material of the absorptive core 40 does not exist in a part of the thickness direction Z of the absorptive core 40. In the high-liquid-permeable portion 43a, the thickness D1 of the liquid-permeable space [see Fig. 5(a)] relative to the thickness D of the absorptive core 40 [see Fig. 5(a)] is preferably 5% or more, more preferably It is 10% or more, more preferably 80% or less, more preferably 70% or less, and more preferably 5% or more and 80% or less, more preferably 10% or more and 70% or less.

When the high liquid permeation portion 43 a is a low basis weight portion of the material forming the absorbent core 40 , the high liquid permeation portion 43 is more reliably high in the liquid permeability of the lower liquid permeation portion 44 . The basis weight of the material forming the absorbent core 40 in 43a is preferably 5% or more, more preferably 10% or more, relative to the basis weight of the material forming the absorbent core 40 in the low liquid permeation portion 44. , preferably 80% or less, more preferably 70% or less, and more preferably 5% or more and 80% or less, more preferably 10% or more and 70% or less. From the same viewpoint as above, the basis weight of the material forming the absorbent core 40 in the high liquid permeation portion 43a is preferably more than 0 g/m ² , more preferably 10 g/m ² or more, and, Preferably it is 350 g/m ² or less, more preferably 250 g/m ² or less, and preferably more than 0 g/m ² and 350 g/m ² or less, more preferably 10 g/m ² or more and 250 g/m 2 or more g/m ² or less.

In the case where the high liquid permeability portion 43a is a low basis weight portion of the material forming the absorbent core 40, from the viewpoint of further improving the liquid permeability, the high liquid permeability portion 43a is preferably free from water-absorbing polymer. thing. According to this configuration, the retention of urine in the high liquid permeation portion 43a can be suppressed, the liquid permeability can be further improved, and the sensitivity of the sensor to temperature changes can be further improved.

Similar to the embodiment shown in FIGS. 1 to 4 , the high liquid permeation portion 43 b shown in FIG. 5( b ) is a through hole in which the material for forming the absorptive core 40 does not exist. The high liquid permeation portion 43b is provided with a space holding member 47 formed of a non-water-absorbent material in a space (liquid permeation space) where no material for forming the absorptive core 40 exists. In this embodiment, the space holding material 47 is filled in the liquid permeation space in the high liquid permeation part 43b. The space holding member 47 functions as a spacer for holding the liquid permeation space in the high liquid permeation portion 43b. In the high liquid permeation portion 43b of the present embodiment, the liquid permeation space is more favorably maintained by the space holding member 47, so that the liquid permeability of the high liquid permeation portion 43b can be more easily maintained. This effect is effective when the absorber 4 contains a water-absorbent polymer in the low-liquid-permeable portion 44, and even if the water-absorbent polymer absorbs urine and becomes swollen, the liquid-permeation in the high-liquid-permeable portion 43b can be well maintained. space. Moreover, since the space holding material 47 functions as a storage space for temporarily holding urine, the time until urine is absorbed by the water-absorbing material of the low-liquid-permeable portion 44 can be easily obtained, thereby further enhancing the liquid leakage suppressing effect.

For the space holding material 47, one formed of a non-water-absorbent material is used. The so-called "non-absorbent" includes not only not absorbing water at all, but also absorbing a small amount of water. In addition, the non-water-absorbent material may be capable of retaining moisture. More specifically, the non-water-absorbent material refers to a material that retains moisture below 60% of its own weight. The water retention amount (water retention amount) with respect to the self-weight of the non-water absorbent material can be obtained by the following method. The mass a of the non-water-absorbent material before being immersed in water was measured as the above-mentioned "self-weight". Next, after fully immersing the non-water absorbent material in water, it was centrifuged (700 rpm, 10 minutes), and the mass b was measured. The mass c obtained by subtracting the mass a from the mass b was used as the water retention amount. Then, the ratio of the above-mentioned mass c to the above-mentioned mass a was calculated by (c/a)×100, and this was taken as the moisture retention amount with respect to the self-weight of the non-water-absorbing material. As the non-absorbent material, a fibrous mass containing hydrophobic fibers or a bulky nonwoven fabric can be used. When the non-water-absorbent material is formed of fibers such as hydrophobic fibers, the water-absorbent material may be one that does not absorb moisture by itself, but can retain moisture between the fibers.

A fiber block is a fiber aggregate formed by braiding a plurality of fibers into one. The manufacturing method of the fiber block is not particularly limited, for example, it can be a fixed fiber aggregate like a sheet obtained by cutting a synthetic fiber sheet (thermoplastic fiber sheet) with a certain size by a cutting machine, etc. Like the non-woven sheet described in Japanese Patent Laid-Open No. 2002-301105, it is an amorphous fiber aggregate produced by pulverizing, pulverizing, and shredding a non-woven fabric mainly composed of thermoplastic fibers (synthetic fibers) into fine flakes. . As a fixed-shape fiber aggregate, the thing provided with two fundamental surfaces which oppose, and the skeleton surface which connects these two fundamental surfaces, is mentioned, for example. This fiber aggregate (fiber mass) is obtained by cutting a fiber sheet as a raw material in a fixed shape. For example, when a fiber sheet as a raw material is cut into a Ding shape, a plurality of cuboid-shaped fiber blocks can be obtained. In the fiber block, generally, the cut surface, that is, the surface that comes into contact with the cutting mechanism such as a cutter when cutting the fiber sheet as the raw material, becomes the skeleton surface, and the non-cut surface, that is, the surface that does not contact the cutting mechanism becomes the skeleton surface. Fundamentals. The basic surface is the front and back surfaces of the fiber sheet (surfaces orthogonal to the thickness direction Z), and is the surface with the largest area among the plurality of surfaces that the fiber block has.

The fluffy non-woven fabric has a large number of spaces defined by the constituent fibers of the non-woven fabric (there are no non-woven fabric constituents such as fibers) in its interior, which means the ratio of the space portion to the total volume of the non-woven fabric (space occupancy rate) above 98%. The bulky nonwoven fabric has an apparent density of preferably 0.01 g/cm ³ or more, more preferably 0.02 g/cm ³ or more, more preferably 0.30 g/cm ³ or less, from the viewpoint of more reliably securing the spacer function. It is preferably 0.20 g/cm ³ or less, more preferably 0.01 g/cm ³ or more and 0.30 g/cm ³ or less, more preferably 0.02 g/cm ³ or more and 0.20 g/cm ³ or less. From the same viewpoint, the basis weight of the above-mentioned fluffy nonwoven fabric is preferably 15 g/m ² or more, more preferably 20 g/m ² or more, and more preferably 50 g/m ² or less, more preferably 40 g /m ² or less. As the above-mentioned bulky nonwoven fabric, for example, a hot air nonwoven fabric, an air-laid nonwoven fabric, a resin-bonded nonwoven fabric, and the like are suitably used. From the viewpoint of more reliably securing the spacer function, the apparent density and basis weight of the fiber mass are preferably also within the same ranges as the preferred ranges of the apparent density and basis weight of the above-mentioned bulky nonwoven fabric.

As the hydrophobic fibers constituting the fiber mass or the bulky nonwoven fabric, thermoplastic fibers (thermofusible fibers) can be used. Examples of the constituent resins (thermoplastic resins) of the thermoplastic fibers include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides such as nylon 6 and nylon 66; polyacrylic acid , polyalkyl methacrylate, polyvinyl chloride, polyvinylidene chloride, etc., one of them can be used alone or two or more of them can be used in combination.

In the liquid permeation space of the high liquid permeation portion 43b, the ratio of the space occupied by the space holding material 47 is preferably 5% or more, more preferably 10% or more, and more preferably 100% or less, more preferably 95% or less. , and it is preferably 5% or more and 100% or less, more preferably 10% or more and 95% or less. This ratio is the ratio of the volume of the space holding material 47 to the space volume of the high liquid permeation part 43 (volume of the space holding material 47 / space volume of the high liquid permeation part 43 ).

In the above-mentioned embodiments shown in FIGS. 1 to 4 , the mark 300 has a star shape. However, the form of the mark 300 is not limited to this. The indicia 300 may be in the shape of words, graphics, symbols, or a combination thereof. The characters can be hiragana, katakana, uppercase English letters, lowercase English letters, Arabic numerals, Roman numerals, various foreign characters, or combinations thereof, etc., and can also be deformed characters. The top view shape of the mark 300 may also have a portion surrounded by a linear portion.

A variation of the marker 300 of the present invention is shown in FIG. 6 . The mark 300 may be a circular shape such as a perfect circle or an ellipse as shown in FIG. 6( a ), or may be a quadrangle as shown in FIG. 6( b ). Besides, the mark 300 may also be a polygon such as a triangle, a quadrangle, a pentagon, and a hexagon, or a geometric shape such as a regular polygon. When the mark 300 is a polygon, it may be a corner with a radian, or a corner without a radian. The mark 300 can also be a pattern of an animal as shown in FIG. 6( c ). Marker 300 in Figure 6(c) is the outline of the animal's face. In addition, it can also be patterns of vehicles, food, plants, animals, characters, musical notes, stars, rainbows, clouds, musical instruments, etc. The mark 300 can also be a combination of a plurality of patterns as shown in FIG. 6(d). The mark 300 of FIG. 6(d) is a combination of a black circle and an arrow pointing to it. As shown in FIGS. 6(e)-(g), the mark 300 may be a combination of lines such as a plurality of straight lines or curved lines. The mark in Fig. 6(e) is a cross where two straight lines intersect. Figures 6(f) and (g) are two straight lines extending parallel to each other side by side.

The mark 300 preferably indicates the installation position of the external components such as the urination sensor 80 . For example, when the geometric shape of the marker 300 shown in FIGS. 6( a ) and ( b ) is similar to the top view of the urination sensor 80 , the center of gravity of the geometric shape is positioned between the urination sensor 80 and the urination sensor 80 . The way of center overlap is preferable in that it is intuitively reminiscent of the installation of the urination sensor 80 . The mark 300 shown in FIG. 6( d ) is preferably in such a way that the black circle overlaps the center of the urination sensor 80 , which is intuitively reminiscent of the installation of the urination sensor 80 . The mark 300 shown in FIG. 6( e ) is preferable in that the intersection (intersection point) of the two straight lines overlaps the center of the urination sensor 80 , which is intuitively reminiscent of the installation of the urination sensor 80 . In FIGS. 6( f ) and ( g ), it is preferable that two straight lines overlap with the edge of the urination sensor 80 to intuitively recall the installation of the urination sensor 80 .

When the mark 300 indicates the installation position of the external components such as the urination sensor 80, it is preferable that the mark 300 and the sensor are in a state where the urination sensor 80 is installed at the position of the mark 300 of the diaper 100. The outer surface portion 82 is integrated and arranged so as to form a specific pattern. With this configuration, it is easier to align the position when installing the urination sensor 80, and the installation position of the urination sensor 80 can be set to a suitable position and an angle for the sensor to obtain good sensitivity. Moreover, even if the position of the urination sensor 80 attached to the diaper 100 is shifted, the shift can be easily recognized. An example of the above-mentioned configuration is shown in FIGS. 7( a ) and ( b ). FIG. 7( a ) shows the mark 300 in the shape of a star and the urination sensor 80 which is arranged on the sensor outer surface 82 except for the corners of the star. FIG. 7(b) shows a state in which the marker 300 shown in FIG. 7(a) overlaps with the urination sensor 80. As shown in FIG. When the urination sensor 80 is attached to the position of the mark 300 of the diaper 100, the urination sensor 80 is superimposed on the mark 300, and the pattern of the mark 300 is integrated with the pattern of the sensor outer surface 82. Thereby, the mark 300 and the sensor outer surface 82 form a star-shaped pattern. The above-mentioned structure is not limited to the form shown in FIGS. 7( a ) and ( b ). For example, the mark 300 can be exemplified as a pattern of an animal's face, and the pattern of the sensor outer face 82 can be a combination of patterns representing expressions of the animal's face. The composition of the combination is that the urination sensor 80 is superimposed on the mark 300, and the pattern of the mark 300 is integrated with the pattern of the outer face 82 of the sensor, whereby the facial expression of the animal changes.

The area of the mark 300 is not particularly limited. The area of the mark 300 may be larger than that of the liquid permeable portion 43, or may be smaller. In addition, the area of the mark 300 may be the same as that of the high liquid permeation portion 43 .

The marking 300 can be printed on the outer surface S1 (non-skin-opposing surface) of the diaper 100 and the high liquid permeable portion 43 by printing the ink previously used for disposable diapers by known methods such as flexo, gravure, and inkjet. The position is thus marked on the outer surface S1.

The material for forming each part of the diaper in the above-mentioned embodiment will be described in detail. As the surface sheet 21, the leakage preventing sheet 23, and the absorber 4, there are no particular limitations, and those previously used for absorbent articles can be used, respectively. As the surface sheet 21, for example, a liquid-permeable nonwoven fabric, a perforated film, or the like can be used. As the leak-proof sheet 23, a liquid-impermeable resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. As the forming material of the absorptive core 40, the above-mentioned hydrophilic fibers or water-absorbing polymers can be used. That is, as the absorptive core 40, the aggregate of a hydrophilic fiber, or the thing which hold|maintained the water-absorbent polymer in this aggregate can be used. Moreover, as the core sheet 41, the same thing as the surface sheet 21 can be used. For example, as the absorber 4, an absorptive core made of a fiber material such as pulp fiber and a fiber-packed body covered with a sheet paper or a core wrap made of a liquid-permeable non-woven fabric, or the like, or a superabsorbent polymer can be used. It is an absorbent core composed of a mixed fiber material such as particles and pulp fibers, etc.

For the outer layer sheet 26 and the flanging-forming sheet 60, for example, non-woven fabrics produced by various manufacturing methods can be used, for example, spunbond non-woven fabrics, hot air non-woven fabrics, spunlace non-woven fabrics, hot-rolled non-woven fabrics, melt-blown non-woven fabrics, or laminates thereof. Non-woven, etc. The outer layer sheet may be constituted by one sheet, or may not be constituted by a laminate of a plurality of sheets. Moreover, as the sheet 60 for burring formation, a water repellent nonwoven fabric can also be used. Elastic members such as the elastic member 61 for cuff formation, the leg elastic member 91, and the waist elastic member 92 of the leak-proof cuff 6 are not particularly limited, and various known elastic materials generally used for such absorbent articles can be used. Examples of the elastic material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, those having a rectangular, square, circular, polygonal or other cross-section linear (linear rubber etc.) or belt (flat rubber etc.), or a multifilament type thread etc. are suitably used.

There are no particular limitations on the respective forming materials of the hook-and-loop fastener 7 and the fixing member 78, and they can be used as long as they are generally used for an unfolded disposable diaper. For example, for the hook and loop fastener 7 , a tape base material having a male material of a mechanical fastener can be used, and for the fastening member 78 , a parent material of a mechanical fastener can be used. As the above-mentioned base material, a fiber sheet capable of being fastened to the above-mentioned male material, such as knitted fabric and non-woven fabric, can be used.

As mentioned above, although the 1st Embodiment of this invention was demonstrated based on the preferable embodiment, this invention is not limited to the said embodiment. For example, although the diaper 100 of the said 1st Embodiment has the outer layer sheet 26 forming the outer surface S1, the leakage preventing sheet 23 may form the outer surface S1. Moreover, although the said disposable diaper is a so-called unfolded type disposable diaper having a hook and loop fastener, it may be a shorts type disposable diaper. In addition, it can be used for infants or adults. In addition, although the urination sensor 80 of the said 1st Embodiment has a power button, it is not necessary to have a power button. As such a form, a rechargeable urination sensor 80 that starts to operate when a charge release is used as a trigger can be exemplified.

Next, the absorbent article (2nd - 6th Embodiment) of this invention is demonstrated. A disposable diaper 101 (hereinafter, also referred to as a diaper 101 ) as a second embodiment of the present invention is a pant-type disposable diaper, as shown in FIG. 8 . As shown in FIG. 9, the diaper 101 is provided with the surface sheet 21 located on the skin-opposing surface side, the multilayer structure outer side sheet 18 located on the non-skin-opposing surface side, and the surface sheet 21 and the outer sheet 18 arranged on the surface sheet 21 and the outer side sheet 18. Absorber 4 in between. More specifically, the liquid-permeable surface sheet 21, the liquid-impermeable or water-repellent leak-proof sheet 23, and the absorption of the liquid-retaining properties disposed between the surface sheet 21 and the leak-proof sheet 23 body 4. The diaper 101 of the present embodiment is provided with: an absorbent body 5, which is formed by laminating and integrating the surface sheet 21, the absorber 4, and the leak-proof sheet 23 in this order; and an outer body 17, which is located in the absorbent body The non-skin-facing surface side of the main body 5 is constituted by the outer sheet 18 for fixing the absorptive main body 5 .

The diaper 101 of the present embodiment is a pant-type disposable diaper, and the side edges of the abdominal portion A and the side edges of the back portion B are joined to each other, thereby forming a pair of side seals S, 16 and a waist opening. part WH and a pair of leg opening parts LH, LH.

The outer sheet 18 forming the outer body 17 of the diaper 101 has a multi-layer structure in which two or more nonwoven fabrics are laminated in the thickness direction, and as shown in FIG. The first non-woven fabric 12 on the non-skin-opposing surface side and the second non-woven fabric 13 arranged on the non-skin-opposing surface side of the first non-woven fabric 12 in a state of partially overlapping with the first non-woven fabric 12 . Both the first nonwoven fabric 12 and the second nonwoven fabric 13 are the outermost constituent materials of the absorbent article. More specifically, the first nonwoven fabric 12 has a portion arranged on the abdominal portion A and a portion arranged on the lower crotch portion C, but does not have a portion arranged on the back portion B, and the second nonwoven fabric 13 has a portion arranged on the lower crotch portion C. The part of the back side part B and the part arrange|positioned at the lower part C of the crotch do not have the part arrange|positioned at the side part A of the abdomen. Furthermore, in the second nonwoven fabric 13, the belt-shaped end region 13a on the ventral portion A side overlaps the non-skin-facing surface side of the belt-shaped end region 12a on the backside portion B side of the first nonwoven fabric 12, and the The overlapping portion of the first non-woven fabric 12 and the second non-woven fabric 13 is the overlapping region 14 . In this embodiment, the overlapping area 14 is the area between the edge 12d of the back part B side of the first nonwoven fabric 12 and the edge part 13u of the ventral part A side of the second nonwoven fabric 13 in the longitudinal direction X of the diaper. . The skin-opposite side refers to the side facing the wearer's skin side when worn, and the non-skin-opposite side refers to the side facing the opposite side to the wearer's skin side when wearing. The first non-woven fabric 12 and the second non-woven fabric 13 may have a portion folded back on the skin-opposing surface side of the outer body 17 at the peripheral edge end of the waist opening WH.

As shown in FIG. 12 and FIG. 13 , in a part of the overlapping area 14, a part that is not joined between the first non-woven fabric 12 and the second non-woven fabric 13 is formed, and this part can be arranged inside to detect the diaper 101 (absorbent article) The sensor bag 15 of the sensor 8 of the changes that have occurred. The overlapping area 14 is shown in FIG. 12 , in the top view of the overlapping area 14, in three directions around the sensor bag 15, there are fixed areas E1~ E3, in the remaining one direction, the insertion port 15a of the sensor is formed. The insertion opening 15a extends and opens in a direction orthogonal to the direction (insertion direction) in which the sensor 8 is inserted into the sensor bag 15 through the insertion opening 15a. In this embodiment, the above-mentioned orthogonal direction is the same as the lateral direction Y. That is, the insertion port 15a extends along the lateral direction Y.

In the present embodiment, the above three directions are viewed from the central portion of the sensor bag 15, the left and right directions and the back side portion B direction, and the remaining one direction is viewed from the central portion of the sensor bag 15, as Ventral A direction. Moreover, the surface of the skin opposing surface side of the 1st nonwoven fabric 12 is joined to the non-skin opposing surface of the back sheet 11 by an adhesive agent. On the other hand, the second non-woven fabric 13 is bonded to the non-skin facing surface of the first non-woven fabric 12 by an adhesive in the fixed regions E1 to E3 located in the overlapping region 14, and the parts other than the overlapping region 14 are bonded by an adhesive. The adhesive is bonded to the non-skin facing surface of the back sheet 11 . The adhesive may be an adhesive that is applied to the entire surface without gaps, or an adhesive that is applied by pattern coating such as a spiral pattern, a dot pattern, and an Ω-shaped pattern. As the adhesive, there is no particular limitation, and an adhesive previously used in such articles can be used, preferably a hot-melt adhesive. The adhesive for fixing the second non-woven fabric 13 is preferably made to have a stronger adhesive force at the part adjacent to the sensor bag 15 than the other parts by different methods of the type and basis weight of the adhesive used.

In the present embodiment, the first nonwoven fabric 12 is a non-stretchable nonwoven fabric, and the second nonwoven fabric 13 is a stretchable nonwoven fabric. Therefore, the stretchability of the second non-woven fabric 13 is higher than that of the first non-woven fabric 12 in the entire area where the sensor pocket 15 is formed in the overlapping region 14 . The stretchability refers to the property of being stretched by stretching and contracting by releasing the stretched state, and the stretchability is higher when it contracts to a length closer to the length before the stretch.

Stretchable non-woven fabrics are stretchable. The term "stretchable" as used herein means that the maximum elongation in the stretching direction is preferably 50% or more. The "maximum elongation ratio" refers to the elongation ratio when the object to be measured is stretched to the ultimate tensile length (the length immediately before failure of the material), and is obtained by the following formula (1). Maximum elongation (%) = {(length after elongation - length before elongation)/length before elongation}×100%...(1) The determination of the maximum elongation can be carried out according to the following procedure. In the natural state of the object to be measured (contracted state of the elastic member), a mark with an interval of 50 mm is marked on the center of the object to be measured in the direction of expansion and contraction, and the interval between the marks is measured and used as the "length before extension". Then, the object to be measured is elongated along its expansion and contraction direction to an extent just before material failure of the object to be measured, and the interval between the above marks in the extended state is measured, and this is taken as the "length after elongation". Then, these measured values were substituted into the above-mentioned formula (1), and the maximum elongation was calculated. Furthermore, a measurement object may be cut out from an absorbent article, and it may be used for measurement as a measurement sample.

The stretchable nonwoven fabric preferably has a maximum elongation ratio of 50% or more and an elongation recovery ratio of 70% or more in at least the transverse direction Y. The elongation recovery rate of the stretchable nonwoven fabric was measured by the following measurement method. <Measuring method of elongation recovery rate> A sample with a length of 50 mm and a width of 25 mm was cut out from the non-woven fabric to be measured. The sample was fixed between the grips of the tensile testing machine (“Tensilon” RTC-1150A of Orientec Co., Ltd.) in a non-stretched and slack state (the gap between the grips K0), and the tensile speed was 300 mm/min. Expand the space between the clamps, thereby stretching the sample, after stretching to the length K2 (=K0×2) when the sample is 100% elongated, narrow the space between the clamps at the same speed as the stretching speed, and The length of the sample at the point when the tensile stress is 0 is taken as the length K1 after the recovery from elongation. The elongation recovery rate at the time of 100% elongation of the nonwoven fabric to be measured was calculated by the following formula. Elongation recovery rate at 100% elongation (%) = [(K2－K1)/(K2－K0)]×100

As the stretchable nonwoven fabric, for example, (1) a stretchable nonwoven fabric in which stretchable fiber layers are integrated on both sides or one side of an elastic fiber layer, and (2) an elastic sheet in which the stretchable fiber layer is integrated into a mesh is suitably used A stretchable non-woven fabric made of two sides or one side of the material, (3) a stretchable non-woven fabric formed by integrating the stretchable fiber layer on both sides or one side of an elastic sheet composed of an elastic film, (4) not crossing each other Rather, it is a stretchable non-woven fabric or the like formed by integrating a plurality of elastic filaments extending in one direction and an extensible fiber layer. The so-called "stretchable fiber layer" here includes not only the fiber layer that can be stretched before integrating with the elastic material, but also the fiber that can be stretched by machining or the like after integrating with the elastic material. Floor. As a method of integrating the elastic fiber layer and the stretchable fiber layer, for example, a method of laminating them in equal layers and intertwining the fibers by water flow or hot air; hot embossing, adhesive, ultrasonic, etc. method of joining. The stretchable nonwoven fabric can be produced, for example, according to the method described in Japanese Patent Laid-Open No. 2009-61743.

Among the first nonwoven fabric 12 and the second nonwoven fabric 13 , the nonwoven fabric with low stretchability may be a stretchable nonwoven fabric or a nonwoven fabric without stretchability. In the present embodiment, the first nonwoven fabric 12 which is a non-stretchable nonwoven fabric corresponds to this. The maximum elongation in the transverse direction Y of the non-stretchable non-stretchable nonwoven fabric is usually less than 50%, more preferably 40% or less, and may be 0%. As the non-stretchable nonwoven fabric, nonwoven fabrics produced by various production methods can be used. As this nonwoven fabric, a spunbond nonwoven fabric, a hot air nonwoven fabric, a needle punched nonwoven fabric, etc. are mentioned, for example. The non-stretchable nonwoven fabric may have a single-layer structure or a laminated structure in which two or more layers are laminated.

The first nonwoven fabric 12 and the second nonwoven fabric in the overlapping area 14 are from the viewpoint of easier insertion of the sensor 8 and more stable holding of the sensor 8 in a pressurized state as described below. At least one of the nonwoven fabrics 13 preferably has stretchability in the extending direction of the insertion port 15a. For example, in the present embodiment, it is preferable that the stretchable nonwoven fabric used as the second nonwoven fabric 13 has stretchability at least 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 stretchability in the lateral direction Y, but may also have stretchability other than the lateral direction Y. The same applies to the case where a stretchable nonwoven fabric is used as the first nonwoven fabric 12 instead of the second nonwoven fabric 13 .

In at least a part of the area where the sensor bag 15 is formed, preferably the whole area, the stretchability of the first non-woven fabric 12 and the second non-woven fabric 13 are different, so that the sensor is inserted into the sensor bag 15 from the insertion port 15a. The device 8 is in a pressurized state between the first non-woven fabric 12 and the second non-woven fabric 13 and is stably held in the sensor bag 15 . Among the first non-woven fabrics 12 and the second non-woven fabrics 13, if the stretchability of the second non-woven fabric 13 arranged on the outer side of the sensor bag 15 in the thickness direction is higher than that of the first non-woven fabric 12 arranged on the inner side, the sensing The sensor 8 is easily kept in the sensor bag 15 in a pressurized state, which is preferable. As an embodiment in which the stretchability of the first non-woven fabric 12 and the second non-woven fabric 13 are different in a part of the region where the sensor bag 15 is formed, for example, the following form can be exemplified. When the depth L15 (refer to FIG. 12 ) is divided into two equal parts and is divided into the region 15b on the side of the insertion opening 15a and the region 15c on the inner side of the insertion direction, only in the region 15b on the side of the insertion opening 15a, the difference between the first nonwoven fabric 12 and the second nonwoven fabric 13 is Scalability is different.

According to the diaper 101 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 which are the outermost constituent materials of the absorbent article, it is not necessary to arrange the sensor Unlike the case of the skin facing side of the diaper, the sensor 8 does not directly contact with excrement, so it is not easy to cause problems in hygiene and failure prevention, and the sensor 8 is easy to reuse. In addition, since the stretchability of the first non-woven fabric 12 and the second non-woven fabric 13 is different, and the sensor 8 is sandwiched by the first non-woven fabric 12 and the second non-woven fabric 13 and held stably, the sensor 8 can be easily inserted, and It is not easy for the sensor 8 to fall off from the sensor bag 15 due to the wearer's movement or posture change. Further, by disposing the sensor bag 15 at a suitable position according to the physical properties to be measured by the sensor 8, the sensor 8 can also be easily arranged at a suitable position. In this way, according to the diaper 101 of the present embodiment, the sensor can be easily reused, the sensor can be easily arranged at an appropriate position, and the sensor can be prevented from falling off.

In the second embodiment, the sensor 8 is not particularly limited, and a known sensor capable of detecting a change occurring in an absorbent article can be used. The change that occurs in the absorbent article is preferably a change that occurs due to excretion of the wearer, for example, a temperature sensor that can measure the temperature raised by urination, and a humidity sensor that can measure the humidity that is raised by urination. A device, a sensor that can measure the impedance that changes due to urination, a odor sensor that can measure the odor caused by urination or defecation, etc. These sensors may also be capable of measuring two or more physical properties, for example, a temperature sensor or a humidity sensor may be a sensor capable of measuring both temperature and humidity. In the case of using a temperature sensor, for example, the sensor is placed in the sensor bag to monitor the temperature of the diaper being worn, and the temperature rise on the side of the first nonwoven fabric 12 caused by the wearer's urination is determined as When urination has occurred, it is possible to detect the urination of the wearer, and it is helpful for the judgment of the replacement time of the diaper 101, and the like. In the case of using a humidity sensor, for example, the sensor is arranged in the sensor bag to monitor the humidity of the diaper being worn, and the increase in humidity caused by the wearer's urination is determined as the occurrence of urination. Can detect the urination of the wearer. In the case of using a humidity sensor, the leak-proof sheet 23 and the first non-woven fabric 12 on the outer side thereof preferably have moisture permeability.

The sensor bag 15 is preferably sized to accommodate the entire sensor 8 inside. By enabling the entire sensor 8 to be accommodated so as not to be exposed to the outside, the wearer can prevent the wearer from directly contacting the body of the sensor 8 and causing the sensor to fall off from the absorbent article. The maximum depth L15 of the sensor bag 15 is preferably 40 mm or more, more preferably 45 mm or more, and preferably 100 mm or less, more preferably 80 mm or less, and preferably 40 mm or more and 100 mm or less , more preferably 45 mm or more and 80 mm or less.

In the diaper 101 of the present embodiment, the second non-woven fabric 13 has stretchability over its entire area, and the second non-woven fabric 13 serving as at least one of the first non-woven fabric 12 and the second non-woven fabric 13 in the overlapping region 14 is connected to the sensor 8 . It has flexibility in the area above the size. With this configuration, the position where the sensor 8 is arranged can be provided with followability to various postures and movements of the wearer, and the sensor 8 to be installed can be prevented from being displaced from the installation position.

In the case where the first non-woven fabric 12 is not the second non-woven fabric 13 but is stretchable in an area larger than the size of the sensor 8, the same effect can be exhibited, but the sensor 8 can be easily inserted into the bag. In other words, it is preferable that the second nonwoven fabric 13 located on the outer side of the sensor bag 15 has stretchability.

In the overlapping area 14 of the diaper 101 of the present embodiment, as shown in FIGS. 10 and 12 , the fixed areas E1 to E3 in three directions around the sensor bag 15 are at least separated by the sensor bag 15 . And the fixed regions E1 and E2 located on both sides thereof also extend beyond the end of the overlapping region 14 . Thereby, since the sensor 8 can be arrange|positioned in the specific position with a narrower range, the measurement precision of the sensor 8 with respect to the physical property of an absorbent article, and the detection precision of the change of an absorbent article are improved. From the same viewpoint, the area of the sensor bag 15 is preferably less than half of the area of the overlap region 14 , ie, less than 50%, more preferably less than 40%, when viewed from the top of the overlap region 14 . In addition, the area of the sensor bag 15 is preferably 5% or more of the area of the overlapping area 14, more preferably 10% or more. Furthermore, the overlapping area 14 shown in FIG. 10 exists continuously in the entire area of the lateral direction Y of the outer body 17 of the lower crotch C, but may not reach both ends of the lateral direction Y of the lower crotch C.

From the viewpoint of being able to accurately obtain information on changes caused by urination, the sensor 8 is preferably installed in an area overlapping the urination site of the diaper. The so-called urination site of the diaper refers to a site where the absorber 4 exists inside. From the viewpoint of more accurately detecting changes in temperature, humidity, etc. due to urination, the sensor 8 is preferably attached to the portion of the lower crotch portion C where the absorber 4 exists, and is preferably attached In the central area of the lateral direction Y of the lower part of the crotch C. In the underpants type diaper 1010, the lower part of the crotch C is located in the region between the left and right leg openings, and in the diapers other than the underpants type, the lower part of the crotch C is the total length of the longitudinal direction X of the diaper in a flat state. The central 3 areas when the diaper is equally divided into 5 areas. The central area C1 of the transverse direction Y of the diaper or the lower part of the crotch is shown in Figure 19, and the diaper is divided by two parallel straight lines extending along the longitudinal direction X in a manner of dividing the length of the transverse direction Y of the lower crotch C into three equal parts. The central area C1 when divided into three (refer to FIG. 19 ).

From the viewpoint of arranging the sensor 8 at a position where information on changes caused by urination can be accurately obtained, the sensor bag 15 is preferably formed at a portion overlapping with the absorber 4, that is, the urination site.

As shown in FIGS. 8 and 9 , in the diaper 101 of the present embodiment, a waist elastic member 92 for forming waist gathers is disposed on the peripheral edge of the waist opening WH, and a waist elastic member 92 is disposed on the peripheral edge of the leg opening LH. Leg elastic members 91 for forming leg gathers. In the diaper 101 of the present embodiment, as shown in FIG. 13 , an intermediate sheet 19 having substantially the same shape as the back sheet 11 is disposed between the leakage preventing sheet 23 and the back sheet 11 . The waist elastic member 92 and the leg elastic member 91 may also be fixed between the back sheet 11 and the intermediate sheet 19 in a stretched state by an adhesive or the like arranged between the two sheets 11 and 19 . In addition, in the absence of the intermediate sheet 19, the waist elastic members 92 and the leg elastic members 91 may be fixed to the back sheet 11 and the back sheet 11 and the back sheet 91 in an elongated state by an adhesive or the like disposed between the two sheets. between the first non-woven fabric 12 or the second non-woven fabric 13 . As the back sheet 11 and the intermediate sheet 19, various well-known thin sheets can be used, preferably non-woven fabrics, for example, non-stretchable non-woven fabrics used in the first non-woven fabric 12 and the second non-woven fabric 13 which have lower stretchability can be used the same.

Next, 3rd - 6th Embodiment of the absorbent article of this invention is demonstrated. Regarding the third to sixth embodiments, the differences from the second embodiment will be mainly described, and the same components will be given the same reference numerals for the same points, and the description will be omitted. Regarding the points not particularly described in the third embodiment to the sixth embodiment, the description of the second embodiment can be applied as appropriate, including preferable configurations.

As shown in FIG. 14 , in the diaper 101A of the third embodiment, the first nonwoven fabric 12 formed of the non-stretchable nonwoven fabric is partially arranged from the back portion B to the lower portion C of the crotch, and the first nonwoven fabric 12 formed of the stretchable nonwoven fabric is partially arranged from the back portion B to the crotch portion C. 2. The non-woven fabric 13 is partially arranged from the abdominal part A to the lower part C of the crotch. Furthermore, in the lower crotch portion C, the end region on the back portion B side of the second nonwoven fabric 13 overlaps with the non-skin opposing surface side of the end region 12a on the ventral portion A side of the first nonwoven fabric 12 . The overlapping portion of the first non-woven fabric 12 and the second non-woven fabric 13 is the overlapping region 14 . Moreover, the sensor pocket 15 is formed in the center part of the horizontal direction Y of this overlapping area 14 . Regarding the composition and shape of the sensor bag 15 and the three-direction fixing regions E1 to E3 surrounding the sensor bag 15, in the longitudinal direction X, the position of the bag insertion opening 15a is the difference between the position of the bag insertion opening 15a and the insertion direction of the sensor bag 15. The position of the inner fixed region E3 is reversed up and down. That is, as shown in FIG. 14 , when viewed from the center portion of the sensor bag 15 in the plan view of the overlapping region 14 , the first nonwoven fabric 12 is provided in three directions, namely, the left and right directions and the ventral portion A direction. In the fixed regions E1 to E3 joined to the second nonwoven fabric 13 , when viewed from the center portion of the sensor bag 15 in the remaining one direction, a sensor insertion port 15 a is formed in the direction of the back side portion B . Except for this point, the rest is the same as that of the second embodiment.

Similarly, in the overlapping region 14 of the diaper 101A of the third embodiment, the stretchability ratio of the second nonwoven fabric 13 located on the outside of the sensor pocket 15 in the thickness direction of the diaper is greater than that of the second nonwoven fabric 13 located on the inside of the sensor pocket 15 The first nonwoven fabric 12 has high elasticity. The diaper 101A of the third embodiment also has the sensor pocket 15 similarly to the diaper 101 of the second embodiment, and the first nonwoven fabric 12 and the first nonwoven fabric 12 and the 2. The stretchability of the nonwoven fabric 13 is different, whereby the same effect as the diaper 101 of the second embodiment can be exhibited.

As shown in FIGS. 15 and 16 , in the diaper 101B of the fourth embodiment, the first nonwoven fabric 12 formed of a non-stretchable nonwoven fabric is arranged on one side (left side in FIG. 16 ) in the transverse direction Y, and the first nonwoven fabric 12 is formed of a stretchable nonwoven fabric as shown in FIGS. The formed 2nd nonwoven fabric 13 is arrange|positioned on the other side (right side in FIG. 16) of the horizontal direction Y. In addition, the end region of the second non-woven fabric 13 on the lateral center side and the non-skin facing side of the end region of the lateral center side of the first non-woven fabric 12 are overlapped, and the overlapping portion of the first non-woven fabric 12 and the second non-woven fabric 13 is Coincidence area 14 . Moreover, the sensor bag 15 is formed in the part of the abdominal part A of the lower part C of the crotch. As shown in FIG. 16 , as fixing regions E1 to E3 in three directions surrounding the periphery of the sensor bag 15 , there are fixing regions E1 and E2 located above and below the sensor bag 15 across the sensor bag 15 , and fixed regions E1 and E2 formed in the overlapping region. In the fixing area E3 at one end of the lateral direction Y of the overlapping area 14, a sensor insertion port 15a is formed at the other end of the lateral direction Y of the overlapping area 14. As shown in FIG. In the diaper 101B of the fourth embodiment, from the viewpoint of easier insertion of the sensor 8 and more stable holding of the sensor 8 in a state where the sensor 8 is pressurized as described below, as the first 2. The stretchable non-woven fabric used for the non-woven fabric 13 is preferably stretchable at least in the longitudinal direction X, which is a direction parallel to the extending direction of the insertion port 15a of the sensor. Similarly, in the overlapping region 14 of the diaper 101B of the fourth embodiment, the stretchability ratio of the second nonwoven fabric 13 located on the outside of the sensor pocket 15 in the thickness direction of the diaper is greater than that of the second non-woven fabric 13 located on the inside of the sensor pocket 15 The first nonwoven fabric 12 has high elasticity.

In the diaper 101B of the fourth embodiment, the sensor pocket 15 is provided similarly to the diaper 101 of the second embodiment, and the first nonwoven fabric 12 and the first nonwoven fabric 12 and the 2. The stretchability of the nonwoven fabric 13 is different, whereby the same effect as the diaper 101 of the second embodiment can be exhibited. 15 and 16, the first non-woven fabric 12 and the second non-woven fabric 13 are arranged continuously in the abdominal portion A, the lower crotch portion C, and the back portion B, respectively, and the overlapping region 14 is also continuously arranged. The first nonwoven fabric 12 and the second nonwoven fabric 13 for forming the overlapping region 14 are arranged only on the lower crotch portion C, although they are formed in the abdominal portion A, the lower crotch portion C, and the back portion B.

As shown in FIG. 10 , in the diaper 101 of the second embodiment, the insertion opening 15a of the sensor of the sensor bag 15 is formed on the side of the ventral portion A of the overlapping region 14, so that the insertion direction of the sensor 8 is from the wearer The direction from the upper side to the lower side makes it easy for the wearer to insert the sensor 8, or for those who use the sensor to measure the characteristics of the diaper such as temperature or humidity. Not easy to fall due to gravity.

As shown in FIG. 14 , in the diaper 101A of the third embodiment, the insertion port 15a of the sensor of the sensor bag 15 is formed on the back side B side of the overlapping area 14, so that the wearer cannot easily recognize that it is arranged in the sensor bag. The sensor 8 of the sensor bag 15. Therefore, it is possible to prevent the wearer from feeling pressure due to the presence of the sensor 8, and to prevent the wearer from removing the sensor 8 while the sensor is monitoring urination or the like.

As shown in FIGS. 15 and 16 , in the diaper 101B of the fourth embodiment, the insertion opening 15a of the sensor of the sensor bag 15 is formed at one end side in the lateral direction Y of the overlapping area 14, so that when the wearer falls down, In particular, in a situation such as a recumbent position or a lateral position, it is easy to put the sensor 8 into or take out of the sensor bag 15 .

In the above-described first to fourth embodiments, the stretchable nonwoven fabric is used as the second nonwoven fabric 13 disposed on the outer side in the thickness direction of the diaper in the overlapping region 14, whereby the sensor pocket 15 is formed in the overlapping region 14. The stretchability of the first non-woven fabric 12 and the second non-woven fabric 13 are different from each other in the entire area of The region 15b on the side of the insertion port 15a of the sensor 8 of the sensor bag 15 of the second non-woven fabric 13 formed of non-woven fabric is provided with an elastic member 15d whose length is greater than or equal to the length of the sensor 8, and is formed in the overlapping region 14 A part of the region where the sensor bag 15 is formed, and the region where the stretchability of the first nonwoven fabric 12 and the second nonwoven fabric 13 are different. In the diaper adopting this structure, the sensor bag 15 is provided similarly to the diaper 101 of the second embodiment, and the sensor 8 does not come into direct contact with the excrement. Therefore, from the aspects of hygiene and failure prevention, the sensor bag 15 is provided. From a viewpoint, the sensor 8 is easy to reuse. In addition, since the stretchability of the first non-woven fabric 12 and the second non-woven fabric 13 are different in a part of the area where the sensor bag 15 is formed, the sensor 8 inserted into the sensor bag 15 is stably held by the first non-woven fabric 12 and the second nonwoven fabric 13 . Further, by disposing the sensor bag 15 at a suitable position according to the physical properties to be measured by the sensor 8, the sensor 8 can also be easily arranged at a suitable position. FIG. 17 shows an example in which the insertion port 15a of the sensor is provided at the end on the side A of the ventral side of the overlapping region 14. However, as shown in the third embodiment or the fourth embodiment, a sensor may be used. The bag 15 has the form of the insertion port 15a of a sensor in the edge part of the back side part B side of the overlapping area 14, or the edge part of the diaper transverse direction.

The length L2 of the elastic member 15d along the edge of the overlapping region 14 for forming the insertion opening 15a of the sensor is preferably relative to the length L18 of the sensor 8 disposed in the sensor bag 15 in the same direction It is more than 100%, more preferably 105% or more, and still more preferably 110% or more. There is no upper limit, and it can be the same as the full width or full length of the diaper. In addition, the length L2 of the edge of the elastic member 15d along the overlapping region 14 of the insertion opening 15a for forming the sensor is preferably 100% or more, more preferably 105%, relative to the length L13 of the insertion opening 15a in the same direction. % or more, and preferably 150% or less, more preferably 140% or less, and more preferably 100% or more and 150% or less, more preferably 105% or more and 140% or less. The elastic member 15d may also be arranged on the first non-woven fabric 12 which is located inside the sensor bag 15 in the thickness direction of the diaper, but it is preferably arranged from the point of view of easy insertion of the sensor 8 into the bag. The second non-woven fabric 13 is provided on the outer side of the sensor bag 15 . As the elastic member 15d, for example, a linear elastic polymer such as synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane can be suitably used. (Linear rubber, etc.), tape (flat rubber, etc.), film-shaped, and the like. The cross-sectional shape of the elastic member 15d may also be a rectangle, a square, a circle, an ellipse, a polygon, or the like.

From the viewpoint of disposing the sensor 8 at a suitable position, the information of the change caused by urination can be accurately obtained, it is also preferable to dispose the sensor that fixes the sensor 8 in the sensor bag 15 . fixing material. For example, an adhesive can also be coated on the surface of the first non-woven fabric 12 opposite to the sensor 8 to form an adhesive layer, or one of the male and female members of the mechanical surface fastener can be fixed to the sensor 8 One, the other is arranged on the surface of the first non-woven fabric 12 opposite to the sensor 8 .

As an example of a preferred embodiment of the change detection method of the present invention, a sensor 8 is disposed in the sensor pocket 15 of the diaper in the above-mentioned embodiments, and the sensor 8 is used to detect the change in the wearer's excretion. With regard to changes in the diaper, such as changes in humidity, temperature, odor, and impedance due to urination, the above-mentioned preferred configurations and descriptions related to the diapers of the respective embodiments may be applied to the present invention as appropriate. Invented change detection method.

As shown in FIG. 19 , the absorbent article of the present invention may have an overlapping region 14 in which the entire second nonwoven fabric 13 is overlapped on a part of the first nonwoven fabric 12 as the outermost constituent material of the absorbent article. In the disposable diaper 101D of the sixth embodiment shown in FIG. 19 , only the ends of the overlapping regions 14 in the three directions have fixed regions E1 to E3 in which the first non-woven fabric 12 and the second non-woven fabric 13 are joined together. The end of the remaining one direction is provided with an insertion port 15a of the sensor. In this case, the diaper which can exhibit the effect of this invention can also be formed by using a stretchable nonwoven fabric as the second nonwoven fabric 13, or by disposing an elastic member in the region on the side of the insertion opening 15a. FIG. 19 shows an example in which the insertion port 15a of the sensor is provided at the end on the side of the ventral portion A of the overlapping region 14. However, as shown in the third embodiment or the fourth embodiment, a sensor may be used. The bag 15 has the form of the insertion port 15a of a sensor in the edge part of the back side part B side of the overlapping area 14, or the edge part of the diaper transverse direction.

In addition, the absorbent article of the present invention may be provided with an indicator 9 for notifying urination by a color change like the diaper shown in FIG. 19 . The indicator 9 preferably extends along the longitudinal direction X of the absorbent article corresponding to the front-rear direction of the wearer, and the sensor pocket 15 is preferably formed at the portion overlapping the indicator 9 . As the indicator 9, it is preferable to arrange|position between the absorber 4 and the leak-proof sheet 23 various well-known compositions which change the color by contact with urine. The indicator 9 usually changes color when it comes into contact with urine, so it is arranged in a position where it is easy to come into contact with urine, for example, the central area C1 in the width direction. Therefore, by arranging the sensor bag 15 at a position overlapping the indicator 9, the sensor 8 can be easily arranged at a position suitable for detecting changes caused by urination.

The second non-woven fabric 13 in the above-mentioned overlapping area 14 is preferably also provided with a mark indicating the position of the sensor bag 15 . The mark can be a combination of text, graphics, symbols, or the like, and the setting method is preferably printing, but not particularly limited.

As mentioned above, although the 2nd - 6th embodiment of this invention was demonstrated based on the preferable embodiment, this invention is not limited to the said embodiment. For example, in the above-mentioned second to sixth embodiments, the sensor 8 may have a function of measuring temperature, humidity, etc. and a function of recording the measured data, or may have a function of measuring temperature, humidity, etc., and a communication function. The measured temperature and other data are sent to an external device by wireless means such as Wi-Fi (registered trademark), and the data is recorded and analyzed by the external device. As an external device, a portable terminal such as a smart phone or a dedicated terminal, a desktop or a laptop personal computer, etc., on which necessary application software or programs are installed, can be mentioned. In the above-mentioned second to sixth embodiments, the shape of the sensor 8 can be determined as appropriate. For example, the top view shape may not be a circle, but a polygon such as an ellipse, a triangle, and a quadrangle, and a heart shape of a playing card. In addition, the sensor 8 is preferably a flat shape whose height is smaller than a diameter or a circle equivalent diameter in a plan view, and may also be a non-flat shape.

Next, the absorbent article (7th and 8th embodiment) of this invention is demonstrated. 20 to 22 show an unfolded disposable diaper 102A as a seventh embodiment of the present invention. The diaper 102A is a so-called unfolded absorbent article in which a waist opening and a leg opening are not formed in advance, but the same is formed at the time of wearing. The diaper 102A is provided with the absorber 4 which absorbs and retains bodily fluids at least in the crotch portion C, and the outer layer body 3 arranged on the side farther from the wearer's skin than the absorber 4 .

In the present embodiment, as shown in FIG. 21 , the diaper 102A is formed symmetrically on one side and the other side across the lateral center line CLy in the unfolded and extended state. The abdominal part A is a part of the front body F of the diaper 102A, and the back part B is a part of the back body R of the diaper 102A. The lower crotch portion C extends from the front body F to the back body R across the longitudinal center line CLx in the longitudinal direction X. Typically, the lower crotch portion C includes a region in which leg edge portions LS and LS are formed as recesses for forming leg openings LH and LH. The leg edge part LS is a part of both side edge parts along the longitudinal direction X of the outer layer body 3 . In the present invention, the abdominal part A, the lower crotch part C, and the back part B may be each region when the diaper 102A in the unfolded and stretched state is divided into three equal parts in the vertical direction X.

The lateral center line CLy is an imaginary straight line extending along the longitudinal direction X by bisecting the diaper 102A in the unfolded and stretched state in the lateral direction Y. The longitudinal centerline CLx is an imaginary straight line extending along the transverse direction Y by bisecting the diaper 102A in the unfolded and stretched state in the longitudinal direction X.

In the present embodiment (seventh embodiment), as shown in FIG. 22 , a diaper 102A includes a liquid-permeable inner layer body 2 that forms a skin-opposing surface and a liquid-impermeable outer layer body that forms a non-skin-opposing surface. 3. The absorber 4 interposed between the inner layer body 2 and the outer layer body 3 , and the components 2 , 3 , and 4 constitute the article body 50 . The members constituting the article body 50 are integrated with each other by bonding means such as adhesive or fusion. The inner layer body 2 covers the entire area of the skin-facing surface of the absorber 4 , and the outer-layer body 3 covers the entire area of the non-skin-facing surface of the absorber 4 . The inner layer body 2 and the outer layer body 3 respectively extend outward from both ends of the longitudinal direction X of the absorber 4 . The outer layer body 3 also extends to the outside from the two side edges (both ends of the transverse direction Y) of the absorbent body 4 along the longitudinal direction X, as shown in FIG. The respective contour lines of the ventral part A, the lower crotch part C, and the back part B are formed.

The inner layer body 2 may have a single-layer structure or a laminated structure formed by laminating a plurality of layers. The entire inner layer body 2 is liquid-permeable as long as aqueous liquids such as bodily fluids can permeate the inner layer body 2 in the thickness direction. For example, a liquid-impermeable sheet may be included in a portion of the laminate structure. Typically, the inner layer body 2 includes a liquid-permeable sheet called a surface sheet or the like, and if necessary, may further include a sublayer, a second layer, and a second layer on the non-skin-opposite side of the surface sheet. Liquid permeable sheet such as sheet. The inner layer body 2 is not particularly limited unless it deviates from the gist of the present invention, and can be used in such absorbent articles and can be used as a front sheet, a sublayer, etc. film etc.

The outer layer body 3 may have a single-layer structure or a laminated structure formed by laminating a plurality of layers. In this embodiment, as shown in FIG. 22 , the outer layer body 3 of the diaper 102A is provided with the first outer layer sheet 3a and the second outer layer sheet 3b in this order from the absorber 4, and has a two-layer structure. The second outer layer sheet 3b forms the non-skin-facing surface (the outer surface of the diaper 102A) of the outer layer body 3 . Both sheets 3a, 3b constitute the article body 50 . The two sheets 3a and 3b may be of the same kind or different from each other. In this specification, the term "same type of sheet" refers to sheets having the same manufacturing process, types of fibers constituting the sheet, fiber diameter and length of constituting fibers, thickness and basis weight of the sheet, and the like. When at least one of them is different, it is a "dissimilar sheet".

The entire outer layer body 3 has liquid impermeability (including liquid impermeability and water repellency), as long as aqueous liquids such as bodily fluids are difficult to permeate through the outer layer body 3 in the thickness direction, for example, liquid permeability may also be included in a part of the laminated structure sheet. Typically, the outer layer body 3 includes a liquid-impermeable sheet called a back sheet, a cuff-forming sheet, or the like. The outer layer body 3 is not particularly limited unless it deviates from the gist of the present invention, and it can be used in such absorbent articles and can be used as a back sheet, a cuff-forming sheet, and the like. For example, various Non-woven fabrics, resin films, laminates of resin films and non-woven fabrics, etc.

In this embodiment, as shown in FIG. 21, the absorber 4 has a shape long in one direction in plan view (in the form shown in FIG. 21, it is a rectangular shape), and its longitudinal direction is the same as the longitudinal direction of the diaper 102A. X is configured in a consistent manner. The absorber 4 is arranged at least in the lower crotch portion C, and in this embodiment, the absorber 4 is arranged to extend from the abdominal portion A to the back portion B via the lower crotch portion C. Both side edges in the longitudinal direction of the absorber 4 (both side edges along the longitudinal direction X) are located inward of the both side edges along the longitudinal direction X of the diaper 102A.

In this embodiment, as shown in FIG. 22 , the absorber 4 includes an absorptive core 40 mainly composed of a water-absorbing material, and an outer surface (skin-facing surface and non-skin-facing surface) covering the absorptive core 40 . ) of the core material 41. As the above-mentioned water-absorbing material, typically, one or more kinds of materials selected from fibrous materials such as wood pulp and water-absorbing polymers can be used. The core wrapping material 41 has liquid permeability, and is typically formed of paper, nonwoven fabric, or the like. The absorber 4 may be composed of only the absorptive core 40 without the core wrapping material 41 .

In this embodiment, the diaper 102A is provided with a pair of leak-proof cuffs 6 and 6 arranged along both sides of the article body 50 in the longitudinal direction X. As shown in FIG. Each leak-proof cuff 6 includes a liquid-impermeable and air-permeable cuff-forming sheet 60. In the cuff-forming sheet 60, one end side of the lateral direction Y is fixed to another member (in the form shown in FIG. 22 ). , is a fixed end for the outer layer body 3), and the other end side of the lateral direction Y is not fixed to another member but is a free end. The elastic member 61 for burring formation is arranged on the above-mentioned free end portion of the sheet 60 for burring forming, and the elastic member 61 for burring forming is fixed to the above-mentioned free end portion in an extended state in the longitudinal direction X, so that the same stretch in the direction. When the diaper 102A is worn, at least in the lower crotch portion C, the free end portion of the cuff-forming sheet 60 is raised to the wearer side with the fixed end portion as the raising base end by the contraction force of the elastic member 61. , whereby the pair of leak-proof cuffs 6 and 6 stand up, thereby preventing excrement such as urine from flowing out to the outside of the lateral direction Y. Furthermore, for the convenience of explanation, in FIG. 22, the leak-proof cuff 6 is shown in the standing state, but in the diaper 102A in the unfolded and stretched state shown in FIG. 21, the leak-proof cuff 6 is not necessarily shown in the figure. 22 stand up as shown.

The diaper 102A is provided with a pair of hook and loop fasteners 7 and 7 arranged on the back side portion B along the longitudinal direction X, as shown in Figs. The edges on both sides; and the fixing member 78, which is arranged on the non-skin-facing surface of the ventral portion A (the non-skin-facing surface of the outer layer body 3), and can be freely attached and detached to each hook and loop fastener 7 with When the diaper 102A is worn, the clasping portion 71 is fastened to the fastening member 78 .

In the present embodiment, a pair of hook and loop fasteners 7 and 7 are respectively provided in a manner to extend from both side edges of the back side portion B along the longitudinal direction X to the outer side of the transverse direction Y. As shown in FIG. One end of the inner side in the lateral direction Y of each hook and loop fastener 7 is fixed to the sheet constituting the diaper 102A, for example, between the cuff-forming sheet 60 and the outer layer body 3. If the outer layer body 3 has a laminated structure, it is fixed to the sheet material constituting the diaper 102A. The sheets of the laminated structure are between each other. The hook-and-loop fastener 7 has a tape base material 70 and a fastening portion 71 fixed to the skin-facing surface of the tape base material 70 . The buckling portion 71 has buckling protrusions on its skin-opposing surface. As the engaging portion 71, a male material of a mechanical fastener can be used. The mechanical fastener includes a male material with a plurality of buckling protrusions arranged on the surface, and a base material with a material that can directly engage the buckling protrusions on the surface. The combination is called a cement. As a mechanical fastener, there is no restriction|limiting in particular, Various well-known thing can be used.

In this embodiment, the fixing member 78 is constituted by including the base material of the above-mentioned mechanical fastener. The raw material for forming the portion of the fixing member 78 for fixing the engaging portion 71 , that is, the raw material of the above-mentioned base material can be selected according to the shape of the engaging protrusion of the engaging portion 71 . As the raw material of the above-mentioned base material, for example, a buckle portion, a mesh portion, or the like, or a nonwoven fabric rich in engagement properties can be used.

In this embodiment, as shown in FIG. 21, diaper 102A is provided with the wing part FP extended outward from the peripheral edge of the article main body 50 (absorber 4). The wings FP are composed of members (the inner layer body 2 , the outer layer body 3 , the burring forming sheet 60 , etc.) extending outward from the peripheral edge of the article body 50 . The plurality of members constituting the wing portion FP are joined to each other by known joining means such as adhesive, heat sealing, and ultrasonic sealing. In the wing portion FP, the portion located on the outer side in the lateral direction Y relative to the two side edges of the article body 50 along the longitudinal direction X and the imaginary extension line of the two side edges is the side wing portion SF. Leg elastic members 91 are respectively disposed on the pair of side flaps SF, and the leg elastic members 91 extend along the longitudinal direction X through the lower crotch portion C, and are expandable and contractible in the longitudinal direction X. As shown in FIG. When the diaper 102A is worn, by the contraction of the elastic member 91, the sheets constituting the leg edges LS and LS (in this embodiment, the outer layer body 3 and the cuff forming sheet 60) are formed along the A plurality of folds (folds) extending in a direction intersecting the contraction directions of the elastic members 91, thereby forming leg gathers in which the folds are continuous substantially throughout the circumference of the wearer's leg.

Figs. 23 to 25 show a pant-type disposable diaper 102B as an eighth embodiment of the present invention. The diaper 102B has a waist opening and a leg opening in advance. About the diaper 102B, the structure different from the said diaper 102A is demonstrated, and the same structure as the diaper 102A is attached|subjected to the same code|symbol, and description is abbreviate|omitted. About the structure which is not especially demonstrated in the diaper 102B, the description regarding the diaper 102A is applied as appropriate.

In the diaper 102B, as shown in FIG. 23, in the longitudinal direction X of the outer layer body 3 of each of the abdominal part A and the back part B, both side edge parts are joined to each other, and a pair of side sealing parts are formed by the joined parts. S, S, waist opening WH, and a pair of leg openings LH, LH.

In this embodiment, as shown in FIG. 25 , the outer layer body 3 of the diaper 102B includes a first outer layer sheet 3c, a second outer layer sheet 3d, and a third outer layer sheet in this order from the absorber 4 in order from near to far. 3e, is a three-layer structure. The third outer-layer sheet 3e forms the non-skin-facing surface of the outer-layer body 3 (the outer surface of the diaper 102B). These sheets 3c, 3d, and 3e may be the same kind or different. Of these sheets 3c, 3d, and 3e, the sheet 3c constitutes the article body 50, and both the sheets 3d and 3e constitute the outer material 30. As shown in FIG. The outer material 30 (sheets 3d, 3e) is larger in plan view than the sheet 3d. As shown in FIG. 25, the outer shape of the diaper 102B in the unfolded state is formed. The respective contour lines of the lower part C and the back side part B. The members constituting the outer material 30 are integrated with each other by bonding means such as adhesive or fusion.

In addition, in the form shown in FIG. 25, a part of the sheet 60 for burring formation is arranged on the non-skin facing surface side of the absorber 4, specifically the first outer layer sheet 3c and the second outer layer sheet 3d. (the outer material 30), even if "essentially disposed on the side closer to the wearer's skin than the absorber, as described above, it is expected to exhibit a specific function on the side closer to the wearer's skin than the absorber. A part of the "member" (hereinafter, also referred to as "skin-side member") is arranged on the non-skin-facing surface side of the absorber, and a part of this skin-side member is not the "outer layer body" mentioned in the present invention. Moreover, since the inner layer body 2 is also the above-mentioned skin-side member, even if a part of the inner layer body 2 such as a surface sheet is arranged on the non-skin pair of the absorber 4 in the same manner as the cuff-forming sheet 60 in FIG. 25 On the face side, a part of the inner layer body 2 is also not the outer layer body 3 .

As the sheets 3d and 3e constituting the outer material 30, nonwoven fabrics, resin films, etc. produced by various production methods can be used without departing from the gist of the present invention. Examples of nonwoven fabrics include spunbond nonwoven fabrics, Hot air non-woven, needle punched non-woven, etc. Moreover, the sheets 3d and 3e may each be a stretchable sheet having stretchability in the transverse direction Y, or may be a non-stretchable sheet having no stretchability. As an example of the stretchable sheet, "a plurality of elastic filaments arranged in a substantially non-stretched state and including inelasticity without crossing each other but extending in one direction" described in Japanese Patent Laid-Open No. 2009-61743 can be exemplified. A stretchable sheet formed by joining stretchable non-woven fabrics made of fibers". For example, the third outer layer sheet 3e (the outermost sheet) can be set as the stretchable sheet, and the second outer layer sheet 3d can be set as a non-stretchable sheet.

In this embodiment, the body peripheral part T (the part located in the same position as the side seal part S in the longitudinal direction X) of the diaper 102B arranged around the body of the wearer has stretchability in the lateral direction Y. Specifically, between the sheets 3d and 3e constituting the outer material 30 in the peripheral portion T of the body, a plurality of waist elastic members 92 can be arranged to expand and contract in the lateral direction Y, and the elastic stretchability of the elastic members 92 is used. , the body peripheral portion T has elasticity in the lateral direction Y. The plurality of elastic members 92 extend in the lateral direction Y in the trunk peripheral portion T, and are arranged intermittently in the longitudinal direction X. As shown in FIG. The trunk peripheral portion T is produced by releasing the elastic member 92 from the extended state after fixing the elastic member 92 between the sheets 3d and 3e in a state extended in the lateral direction Y. In the wearing state of the diaper 102B, a plurality of folds (folds) extending in the direction (longitudinal direction X) intersecting with the elastic members 92 are formed on the surface of the body peripheral portion T by the contraction of the elastic members 92 . Furthermore, the portion of the peripheral portion T of the body that overlaps with the absorber 4 in a plan view has been subjected to operations such as dividing the elastic member 92 so that the elastic member 92 no longer exhibits elastic elasticity, so this portion is in the transverse direction Y. is not scalable.

Hereinafter, the diapers 102A and 1B are also collectively referred to as "diapers 102". The following description about the diaper 102 applies to both the diapers 102A and 1B unless otherwise noted.

In the diaper 102, as shown in Figs. 20 and 22, a part of the non-skin-facing surface of the outer layer body 3 forming the outer surface of the lower crotch portion C is provided with a diaper so as to include a region overlapping with the absorber 4 in plan view. The sensor corresponding area 10 for installing the sensor 8 is provided. Furthermore, the sensor 8 is not a constituent member of the absorbent article of the present invention.

The sensor 8 may include a sensor (temperature sensor) capable of detecting the temperature of the portion of the diaper 102 overlapping the sensor 8 in plan view. In this case, the sensor 8 can also detect information other than the temperature, and as the information other than the temperature, for example, humidity can be exemplified. Unless otherwise specified, the following description is provided on the premise that the sensor 8 includes a sensor capable of detecting temperature. The number of the sensors 8 installed in the sensor corresponding area 10 is not particularly limited. When the number of the sensors 8 installed in the sensor-corresponding area 10 is one, the one sensor 8 is a temperature sensor capable of detecting at least the temperature of the diaper 102 . When the number of sensors 8 installed in the sensor-corresponding area 10 is plural, as long as at least one of the plural sensors 8 can function as a temperature sensor. For example, a temperature sensor and a humidity sensor for detecting humidity can also be installed as the sensor 8 in the sensor-corresponding area 10 .

In this embodiment, the sensor 8 includes a sensing portion (not shown) for detecting temperature, a battery (not shown) for supplying power to the sensing portion, and a casing 81 serving as a box housing the same. The housing 81 is provided with a power button (not shown) for turning on/off the sensor 8, and an indicator (not shown) that changes the display color or blinking pattern according to the operating state of the sensor 8. shown) etc. The sensor 8 is turned on by pressing and operating the above-mentioned power button, detects the temperature of the diaper 102 and other information about the diaper 102 according to a specific period, and sends the information to a device located at a distance from the sensor 8 according to a specific period. Communication terminal device (not shown) at the location. The above-mentioned communication terminal device is, for example, a smart phone, a tablet, or a personal computer.

The casing 81 has a specific thickness in order to incorporate the above-described sensing portion and the like. The shape of the sensor 8 is not particularly limited. In this embodiment, as shown in FIG. 20 and FIG. 22 , it has an elliptical shape in plan view, and is a curved shape without corners. In addition, the casing 81 has waterproofness in order to protect the built-in sensing portion and the like from moisture.

When the housing 81 is installed in the sensor corresponding area 10, the surface in contact with the sensor corresponding area 10 has a buckling portion (not shown), and is fixed to the component (not shown) constituting the sensor corresponding area 10 through the buckling portion. A member that forms the non-skin facing surface of the outer layer body 3). The above-mentioned buckling portion can be, for example, a male material of a mechanical fastener that is the same as the buckling portion 71 of the above-mentioned hook and loop fastener 7 .

As described above, the sensor-corresponding region 10 exists in the lower part of the crotch C and includes a region overlapping with the absorber 4 in plan view, and overlaps with the projected image when the absorber 4 is projected in the thickness direction. One of the important functions of the sensor 8 installed in the sensor-corresponding area 10 is to detect the temperature affected by the excrement absorbed and retained by the absorber 4. Therefore, from the viewpoint of improving the detection sensitivity of the sensor 8, The installation position of the sensor 8 is preferably located at the lower part of the crotch C and overlapping with the absorber 4 in a plan view. From this point of view, the sensor-corresponding region 10 needs to include a region located in the lower part of the crotch C and overlapped with the absorber 4 in a plan view. overlapping area. However, the sensor-corresponding area 10 can also be premised on the area in the lower part of the crotch C and including the area overlapping with the absorber 4 in plan view, and including the area that does not overlap with the absorber 4 in plan view, for example, the area that overlaps the absorber 4 in plan view The perimeter of the overlapping area.

In this embodiment, as shown in FIG. 20 and FIG. 22 , the existence of the sensor corresponding area 10 can be visually recognized. Specifically, the sensor-corresponding region 10 , which is a part of the non-skin-facing surface of the outer layer body 3 of the lower crotch portion C, is dyed in a color different from that of the peripheral portion as a whole by printing or the like. If the existence of the sensor-corresponding area 10 can be visually recognized as described above, the installation of the sensor 8 does not require time-consuming confirmation of its installation position, so that the installation of the sensor 8 can be performed smoothly.

In the present invention, the method for visually recognizing the existence of the sensor-corresponding area 10 is not particularly limited. Outline coloring. In addition, for example, any part of the outer body 3 that is not facing the skin (or not the sensor corresponding area 10 ) may be printed with text, graphics, patterns, etc. indicating the existence of the sensor corresponding area 10 . In addition, within the scope of not departing from the spirit of the present invention, the printing of coloring, characters, graphics, patterns, etc. can also be replaced, or on the basis of the printing, operations such as forming concave parts or convex parts in the sensor corresponding area 10 can be adopted. , so that the three-dimensional structure of the corresponding region 10 of the sensor is different from that of the peripheral portion.

As one of the main features of the diaper 102, the following point can be exemplified: in the outer layer body 3 of the lower part C of the crotch, the thermal conductivity of the first part 31 provided with the sensor corresponding region 10 on the non-skin facing surface is relatively high. The second portion 32 of the corresponding area 10 where the sensor is not disposed on the non-skin facing surface is high. The first portion 31 is the entire portion overlapping the sensor corresponding region 10 of the lower crotch portion C outer layer body 3 in plan view, and the second portion 32 is the portion other than the first portion 31 of the lower portion C outer layer body 3 .

As the index of the above-mentioned "thermal conductivity", the "thermal power value" can be used. The thermal insulation power value is the power required to maintain a certain temperature of the substance in contact with the external air, and is measured by the following method, and the unit is "W/m ² ". The thermal insulation power value is a physical property value that expresses the thermal insulation of the substance (the ease of flow of heat in the substance), and is defined as "When the temperature of one surface of the object is taken away by the surface on the opposite side, the temperature of the surface is kept constant for a certain amount of time. Electricity per unit area required”. The smaller the value of thermal insulation power value, the slower the heat transfer speed in the material, the higher the thermal insulation, that is, the lower the thermal conductivity. Therefore, in the diaper 102 in which the thermal conductivity of the first part 31 is higher than that of the second part 32, the relationship of "the first part 31>the second part 32" is established with respect to the thermal insulation power value.

<Measurement method of thermal insulation power value> This measurement method is carried out using a measuring device of "q-max", which is the maximum value of the heat flux moving per unit area, and is used as an index of the touch feeling of cold and temperature. As an example of this measuring apparatus, "KES-F7 Thermo Lab" manufactured by Kato Technology Co., Ltd. can be mentioned. Specifically, using KES-F7, following the dry contact method, the skin-facing surface or the non-skin-facing surface of the evaluation object (for example, the first part 31 or the second part 32 of the outer layer body 3 taken out from the diaper 102 ) is measured. The thermal insulation power value of any 12 places on the surface is taken as the arithmetic mean value of the thermal insulation power value of the evaluation object. The larger the heat-retaining power value, the higher the thermal conductivity of the evaluation object (the lower the heat-retaining property).

When measuring the physical properties of the outer layer such as thermal insulation power value, when the outer layer is taken out from the absorbent article, if the outer layer is fixed to other members by means of adhesive, fusion, etc., it is necessary to apply an organic solvent to the fixed part. Blow the cold air for cold spraying, etc., release the fixation and then take it out. The procedure of taking out the member from the absorbent article is common to the measurement in this specification.

Improving the thermal conductivity of the outer layer body 3 (increasing the thermal insulation power value) can improve the detection sensitivity of the sensor 8 installed in the outer layer body 3 to detect the heat in the diaper 102, but it depends on the specific method used to improve the thermal conductivity of the outer layer body 3. Depending on the means, there is a risk of inducing an inconvenience in which excrement leaks to the outside through the outer layer body 3 . On the other hand, in the present invention, as described above, in the outer layer body 3, only the thickness of the first portion 31 is selectively made thinner than that of the second portion 32, etc., so that a portion with high thermal conductivity is formed, so that it is possible to It is possible to prevent the occurrence of inconveniences (exudation of excrement through the outer layer 3, etc.) that may be caused by increasing the thermal conductivity of the outer layer body 3 (the first part 31), and can realize the high sensitivity of the sensor 8. As a result, it is possible to The excretion of the wearer of the diaper 102 is detected with high accuracy by the sensor 8 .

Furthermore, in the present invention, the sensor 8 is mounted on the outer surface of the lower crotch portion C of the diaper 102 (the non-skin-facing surface of the outer body 3 ), so when the diaper 102 in the wearing state is wearing clothes , the sensor 8 is interposed between the lower part of the crotch C and the clothing, so that a gap can be generated between the lower part of the crotch C and the clothing. That is, the sensor 8 can function as a spacer for preventing the diaper 102 from adhering to the clothes overlaid thereon. With the spacer function of the sensor 8, even if the excrement in the diaper 102 seeps out to the outside on the outer surface of the lower crotch C, the probability of the exuded excrement adhering to the clothes will be reduced, thus preventing the excrement from being caused. Clothes are soiled. In addition, if a gap is formed between the lower crotch portion C and the clothes overlapped with the sensor 8 as the center, the heat generated from the sensor 8 is easily diffused to the periphery through the gap, so that the installation sensing can be suppressed. Bad condition caused by device 8.

Furthermore, the above-mentioned “thermal conductivity of the first part 31 > thermal conductivity of the second part 32 ” (the thermal conductivity of the first part 31 > the thermal insulation power of the second part 32 ) can be more reliably exhibited in the outer layer body 3 of the lower part of the crotch C It is preferable to set the thermal insulation power value of each part of the outer-layer body 3 as follows from the viewpoint of the effect which the relationship of the value) is established. The ratio of the heat preservation power value of the first part 31 to the heat preservation power value of the second part 32 is, under the premise that the former > the latter, in terms of the former/the latter, preferably 1.01 or more, more preferably 1.1 or more, and preferably 10 or less, more preferably 2 or less. On the premise that the thermal insulation power value of the first part 31 is larger than the thermal insulation power value of the second part 32, preferably 0.50 W/m ² or more, more preferably 0.70 W/m ² or more, and preferably 1.50 W /m ² or less, more preferably 1.00 W/m ² or less. On the premise that the thermal insulation power value of the second part 32 is smaller than the thermal insulation power value of the first part 31, preferably 0.20 W/m ² or more, more preferably 0.50 W/m ² or more, and more preferably 1.0 W /m ² or less, more preferably 0.90 W/m ² or less.

In the outer layer body 3 of the lower crotch portion C, the above-mentioned relationship of "thermal conductivity of the first part 31 > thermal conductivity of the second part 32" (the thermal insulation power value of the first part 31 > the thermal insulation power value of the second part 32) is set. From the standpoint of establishment, the thickness of the first portion 31 is preferably thinner than that of the second portion 32 . That is, as one of means to establish the relationship between the magnitudes of the thermal conductivity, the relationship of "thickness of the first portion 31 <thickness of the second portion 32" can be established, for example.

The ratio of the thickness of the first part 31 to the thickness of the second part 32 takes into account the advantages (increased thermal conductivity and heat conduction speed) and disadvantages (the strength of the first part 31 decreases, etc.) brought about by the thinning of the former, where the former < the latter On the premise, in terms of the former/the latter, it is preferably 0.01 or more, more preferably 0.05 or more, still more preferably 0.09 or more, and more preferably 0.80 or less, more preferably 0.50 or less, and still more preferably 0.46 or less. On the premise that the thickness of the first portion 31 is thinner than the thickness of the second portion 32, it is preferably 0.05 mm or more, more preferably 0.1 mm or more, and preferably 0.50 mm or less, more preferably 0.02 mm or less. On the premise that the thickness of the second part 32 is thicker than the thickness of the first part 31, preferably 0.1 mm or more, more preferably 0.15 mm or more, and preferably 2.0 mm or less, more preferably 1.5 mm or less. The thickness of the outer layer body 3 (1st part 31, 2nd part 32) so-called here is obtained by measuring the outer layer body taken out from the absorbent article by the following method.

<Measurement method of thickness> The sheet to be measured (outer layer body 3) was cut along the thickness direction, the cut surface was observed with a "microscope" (manufactured by Keyence Corporation, VHX-1000), and the measurement was measured based on the observed image. The thickness of the target part (the first part 31, the second part 32). The thickness of any 10 locations in the above-mentioned measurement object portion was measured, and the arithmetic mean of the thicknesses at these 10 locations was taken as the thickness of the measurement object portion.

The method of establishing the above-mentioned relationship of "thickness of the first part 31 <thickness of the second part 32" in the outer layer body 3 of the lower crotch C is not particularly limited, except that in the first part 31 and the second part 32, In addition to the method in which the thickness is originally different (not accompanied by compression in the thickness direction of the former), for example, in the outer layer body 3 of uniform thickness, the method of compressing only the first part 31 in the thickness direction by embossing can be exemplified. . In the outer layer body 3 obtained by the selective compression method, the compressed first portion 31 has a thinner thickness and higher thermal conductivity than the uncompressed second portion 32 (thermal insulation power). value is larger), but the composition of the two is the same as each other.

In the outer layer body 3 of the lower part of the crotch C, the above-mentioned "thermal conductivity of the first part 31 > thermal conductivity of the second part 32 " (the thermal insulation power value of the first part 31 > the thermal insulation power value of the second part 32 ) In addition to the above-described method of providing a difference in thickness between the two parts 31 and 32, the method of establishing the method can be exemplified by a method of making the two parts 31 and 32 differ in composition. Specifically, a method of making the first portion 31 whose thermal conductivity should be relatively high contains a material with high thermal conductivity such as a metal material can be exemplified. That is, it is preferable that the 1st part 31 contains a metal material from a viewpoint of making the said magnitude|size relationship of thermal conductivity hold. Examples of the metal material include aluminum, tin, chromium, nickel, gold, silver, copper, germanium, titanium oxide, zinc oxide, silicon oxide, magnesium fluoride, and the like, and one of them may be used alone or two or more of them may be used in combination. used in combination.

The content of the metal material in the first part 31 is preferably 0.1 mass % or more, more preferably 0.5 mass % or more, still more preferably 1 mass % or more, with respect to the total mass of the first part 31 , and more preferably It is 20 mass % or less, More preferably, it is 15 mass % or less, More preferably, it is 10 mass % or less. Furthermore, typically, the second portion 32 does not substantially contain a metal material, but within the scope not departing from the gist of the present invention, the metal material may be included in a smaller amount than the metal material in the first portion 31 .

The method for containing the metal material in the first part 31 is not particularly limited. For example, the method of kneading the metal material into the resin forming the fiber constituting the first part 31 and the method of evaporating the metal material to the first part 31 can be exemplified. , A method of laminating a metal sheet formed of a metal material to the first portion 31, and the like. That is, the metal material can be spread on the first part 31 , or can be interposed in the form of a metal layer on the skin-facing surface (the surface facing the absorber 4 ) of the first part 31 , if the first part 31 is a laminated layer structure, then the interposition is arranged inside the laminated structure.

The first portion 31 preferably has liquid impermeability and higher air permeability than the second portion 32 . As a result, the air permeability of the sensor-corresponding area 10 where the sensor 8 is installed is improved, so that the heat generated from the sensor 8 can be quickly removed. Therefore, the detection sensitivity can be expected to be further improved for multiple urination detections. However, increasing the air permeability of the outer layer body 3 (the first part 31 ) results in a decrease in the density of the outer layer body 3 and an increase in the distance between the fibers constituting the fiber. Depending on the situation, there is leakage resistance, which is one of the main functions of the outer layer body 3 . The risk of excretion oozing out to the outside of the diaper 102 through the outer body 3 is lowered. Therefore, the first part 31 preferably has liquid impermeability even if the air permeability is higher than that of the second part 32 .

As an index for determining whether or not the outer layer body 3 (the first part 31 and the second part 32 ) has liquid impermeability, the water pressure resistance measured by the following method can be used. When the water pressure resistance of the evaluation target sheet is preferably 1000 mmAq. or more, and more preferably 1500 mmAq. or more, 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 was measured according to the water resistance test (hydrostatic pressure method) A method (low water pressure method) of JIS L1092-1998. In the water resistance test, a nylon mesh sheet (pore size: 133 μm, thickness: 121 μm, manufactured by Kurashiki Textile Co., Ltd., DO-ML-20) was stacked on the test piece and measured. Furthermore, when the size of the test piece does not meet the requirements, a corresponding device can be installed to reduce the measurement area, so that the water collides with the test piece of the area that can be used, and the water pressure resistance is measured by the same method. For the measurement object sheet, three test pieces were prepared and measured, respectively, and the arithmetic mean of the measured values was used as the water pressure resistance of the measurement object sheet.

As an index of the above-mentioned "air permeability", "air permeability resistance value" can be used. A smaller value of air permeability resistance means that the air passing volume per unit time and per unit area is larger and the air permeability is higher. Conversely, a larger air permeability resistance value means that the air passing volume per unit time and per unit area is smaller and the air permeability is lower. Therefore, in the diaper 102 in which the air permeability of the first part 31 is higher than that of the second part 32, the relationship of "the first part 31 < the second part 32" is established regarding the air permeability resistance value.

From the viewpoint of the effect of the above-mentioned relationship of "the air permeability resistance value of the first part 31 < the air permeability resistance value of the second part 32" in the outer layer body 3 of the lower crotch part C more reliably, the first The ratio of the air permeability resistance value of the first part 31 to the air permeability resistance value of the second part 32 is preferably 0.001 or more, more preferably 0.005 or more, and more preferably 0.5 in terms of the former/the latter under the premise that the former < the latter Below, it is more preferable that it is 0.1 or less. The air permeability resistance value of the first part 31 is preferably 0.005 kPa·s/m or more, more preferably 0.01 kPa·s/m or more, and more preferably 5 kPa·s/m or less, more preferably 3 kPa·s /m or less. The air permeability resistance value of the second part 32 is preferably 0.005 kPa·s/m or more, more preferably 0.01 kPa·s/m or more, and more preferably 5 kPa·s/m or less, more preferably 3 kPa·s /m or less. The air permeability resistance value of the outer layer body 3 (1st part 31, 2nd part 32) so-called here is obtained by measuring the outer layer body taken out from the absorbent article by the following method.

<Measurement method of air permeability resistance value> The air permeability resistance value of the sheet to be measured was measured using an air permeability tester "KES-F8-AP1AIR PERMEABILITY TESTER" (trade name) manufactured by Kato Technology Co., Ltd. Specifically, using an air permeability tester, following a conventional method, the air permeability resistance value of any 12 places in the measurement target sheet was measured, and the arithmetic mean value was taken as the air permeability resistance value of the sheet.

The air permeability resistance value can be adjusted by adjusting the density of the outer layer body 3, the distance between fibers of the constituent fibers, and the like. As a method of establishing the above-mentioned relationship of “the air permeability resistance value of the first part 31 <the air permeability resistance value of the second part 32 ” in the outer layer body 3 of the lower crotch part C, the first part 31 can be used with a high air permeability The method of using raw materials (such as raw materials with relatively low fiber density) and the method of using raw materials with low air permeability (such as raw materials with relatively high fiber density, resin films) for the second part 32 can also be used in combination.

In the present invention, the sensor-corresponding region 10 is as described above, as long as it is arranged on a part of the non-skin-facing surface of the outer layer body 3 of the lower crotch C so as to overlap with the absorber 4 in a plan view, it can be used in this area. can be set arbitrarily within the range. FIG. 26 shows an example of an arrangement diagram of the sensor corresponding area 10 (first part 31 ) of the diaper 102 (diaper 102A, 1B).

In Fig. 26(a), a pair of straight lines VL and VL extending along the longitudinal direction X are imaginary straight lines, which pass through two of the transverse direction Y of the part with the largest length (width) in the transverse direction Y in the absorber provided in the diaper 102. The region (hereinafter, also referred to as "absorber width region") 42 sandwiched between the pair of imaginary straight lines VL and VL includes a region overlapping with the absorber in plan view, and the absorber along the longitudinal direction X. Both the imaginary extension area at the time of imaginary extension. In the form shown in FIG. 26( a ), the sensor corresponding area 10 (the first part 31 ) is located in a part of the absorber width area 42 of the lower crotch C, specifically the central part of the longitudinal direction X, and spans across the diaper 102 The longitudinal centerline CLx of the center of the longitudinal direction X.

The form shown in FIG. 26( b ) is the same as that of FIG. 26 ( a) The form shown is the same. In the form shown in FIG. 26( c ), except that the sensor corresponding area 10 (the first part 31 ) continuously extends over the entire length of the lateral direction Y of the lower crotch C, and includes the lateral extension from the absorber width area 42 to the outside of the lateral direction Y Except for the part shown, the rest is the same as that shown in Fig. 26(a).

26( d ) to 26 ( f ) each form an area 111 as a whole, except that a plurality of sensor-corresponding areas 10 (the first part 31 ) having an elliptical shape in plan view are arranged in close proximity to each other. Other than this point, it is the same as the form shown in FIG.26(a) - FIG.26(c). In the area 111 , there may be a second part 32 that does not have the sensor corresponding area 10 between the adjacent sensor corresponding areas 10 , but the area of the second part 32 existing in the area 111 is extremely small. The thermal conductivity will not be affected substantially. In the form shown in FIGS. 26(d) to 26(f), the sensor 8 can be installed at any position in the area 111, for example, one sensor 8 can be installed across the corresponding areas of a plurality of sensors 10 way to install. The form shown in FIG. 26(d) is the same as the form in which the single sensor corresponding area 10 of FIG. 26(a) is replaced with the area 111, and corresponds to the form shown in FIG. 26(a). This correspondence also exists in the form shown in Fig. 26(e) and the form shown in Fig. 26(b), and the form shown in Fig. 26(f) and the form shown in Fig. 26(c).

The arrangement pattern of the sensor corresponding area 10 (the first part 31 ) can be selected according to the type of the absorbent article. Specifically, for example, an unfolded absorbent article such as a diaper 102A shown in FIG. 20 (including the hook and loop fasteners 7 provided on the both side edges of the back side part B along the longitudinal direction X, and provided on the abdominal side The absorbent article of the non-skin-facing side of the part A and the fixing member 78 of the hook-and-loop fastener 7) and the shorts-type absorbent article like the diaper 102B shown in FIG. 22 (the abdominal part A and the back side In the absorbent article in which both side edges along the longitudinal direction X of each of the parts B are joined to each other to form the waist opening WH and the leg opening LH), the sensor corresponding to the area 10 (the first part 31 ) may be The configuration pattern is different.

26, when the diaper 102 is an unfolded absorbent article, the sensor corresponding area 10 is preferably (i) offset in the center of the lateral direction Y of the lower crotch C (not present in the lateral direction Y of the lower crotch C) the two sides), more preferably (ii) offset from the absorber width region 42. The forms shown in FIGS. 26( a ), 26 ( b ), 26 ( d ) and 26 ( e ) satisfy both of the above (i) and (ii).

In addition to the above (i) and (ii), the diaper 102, which is an unfolded absorbent article, is preferably, as shown in FIG. 26(a), (iii) in the sensor corresponding area 10, with the longitudinal center line CLx (the center of the longitudinal direction X of the diaper 102) as a boundary, the part located on the abdominal side part A with respect to the longitudinal center line CLx is used as the abdomen sensor corresponding area 10A, and the part located on the backrest side part B with respect to the longitudinal center line CLx is used as the boundary When the backside sensor corresponds to the region 10C, the following (1) to (3) are satisfied. (1) The area of the corresponding region 10A of the ventral sensor>0 (2) The area of the backside sensor corresponding area 10C≧0 (3) The area of the ventral sensor corresponding region 10A > the area of the dorsal sensor corresponding region 10C

In the arrangement pattern of the above (iii), the sensor corresponding area 10 must exist on the side A of the ventral part (above (1)) with respect to the longitudinal center line CLx, and may not exist on the side B of the backrest side part with respect to the longitudinal center line CLx (above (2)), and deviates to the ventral part A side (above (3)). In the form shown in FIG. 26( a ), the ventral sensor corresponding area 10A and the back sensor corresponding area 10C are connected and integrated, but the two may not be connected but separated in the longitudinal direction X.

26, when the diaper 102 is a pant-type absorbent article, the sensor corresponding area 10 is preferably (iv) offset in the center of the longitudinal direction X of the lower crotch C (not present in the longitudinal direction X of the lower crotch C) both ends). The forms shown in Fig. 26(a), Fig. 26(c), Fig. 26(d) and Fig. 26(f) all satisfy the above (iv). The diaper 102 which is an underpants-type absorbent article more preferably satisfies the above-mentioned (iii) in addition to the above-mentioned (iv), and particularly preferably satisfies the above-mentioned (ii) in addition to the above-mentioned (iv) and (iii).

Regarding the arrangement pattern of the sensor corresponding area 10 (the first part 31 ), it is considered to be preferable in the unfolded absorbent article to satisfy the above (i) "offset to the center of the lateral direction Y of the lower crotch C (not present) Common to both sides of the lateral direction Y of the lower part of the crotch C)", it is considered to be preferable in the shorts-type absorbent article when satisfying the above (iv) "offset to the center of the longitudinal direction X of the lower part of the crotch C (not to be offset). It is common to both ends of the longitudinal direction X of the lower part of the crotch C)". That is, in the unfolded absorbent article, the sensor-corresponding area is preferably offset to the lateral center of the absorbent article, and in the shorts-type absorbent article, the sensor-corresponding area is preferably offset from the absorbent article the vertical center. The reason why the direction in which the sensor-corresponding regions 10 are offset in the unfolded absorbent article and the pant-type absorbent article as described above is different is that the manufacturing efficiency of the absorbent article, especially the area for arranging the sensor-corresponding regions, is different. The ease of processing varies. That is, in the unfolded absorbent article, typically, the longitudinal direction of the absorbent article is aligned with the longitudinal direction (so-called MD: Machine Direction) at the time of manufacture, and therefore, the process for arranging the area corresponding to the sensor during manufacture of the absorbent article is performed. Sometimes it is relatively easy to deal with the pattern change in the longitudinal direction along the MD, such as the change of the longitudinal length of the corresponding area of the sensor, etc., but it is not easy to deal with the pattern change in the lateral direction. Therefore, in the case of offsetting the corresponding area of the sensor in the unfolded absorbent article, it is better to use the pattern in which the corresponding area of the sensor is offset to the horizontal center of the absorbent article as the basis, and the basic pattern In the process, operations such as changing the vertical length of the corresponding area of the sensor are performed. On the other hand, in the underpants-type absorbent article, the transverse direction of the absorbent article is typically aligned with the MD. Therefore, in the case of the underpants-type absorbent article, when the sensor corresponding area is to be offset from the above-mentioned viewpoint, Preferably, operations such as changing the horizontal and vertical lengths of the corresponding regions of the sensors are performed on the basis of the pattern in which the corresponding regions of the sensors are offset in the longitudinal center of the absorbent article.

In FIG. 27, the cross section of the crotch lower part C in the thickness direction of the modification of the diaper 102 is shown. The diaper 102 shown in FIG. 27 is a modified example of the form shown in FIG. 26(a), therefore, the first part 31 (sensor corresponding area 10) is located in the longitudinal direction X of the absorber width area 42 of the lower crotch C The central portion, and spans the longitudinal centerline CLx passing through the center of the longitudinal direction X of the diaper 102 . In the diaper 102 shown in FIG. 27, the outer-layer body 3 is provided with the 1st outer-layer sheet 3f and the 2nd outer-layer sheet 3g in order from the absorber 4 in this order, and has a two-layer structure. Typically, the two sheets 3f and 3g are joined to each other by known joining means such as adhesive and fusion. The second outer layer sheet 3g not only forms the non-skin facing surface of the outer layer body 3 but also the outer surface of the diaper 102, and the sensor corresponding area 10 is provided on the non-skin facing surface of the second outer layer sheet 3g.

In the form shown in FIG. 27( a ), the first outer layer sheet 3 f is constituted by the moisture-permeable film 35 . The thickness and composition of the moisture-permeable membrane 35 are uniform. The moisture-permeable membrane 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. The above-mentioned microporous film is formed by melt-kneading, for example, a hydrophobic thermoplastic resin (polyolefin-based resin, etc.) and inorganic filler fine particles (calcium carbonate, etc.) incompatible with the thermoplastic resin to form a film, and the film is uniaxially formed. or biaxial extension. In the microporous film thus produced, a large number of micropores (microvoids) are formed from the interface between the thermoplastic resin and the inorganic filler microparticles 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 more preferably 30 g/m ² or less, more preferably 25 g/m ² or less.

In the form shown in Fig. 27(a), the thickness of the second outer layer sheet 3g is the same in the first part 31 (sensor corresponding area 10) and the second part 32, but the composition is different, due to the difference in the composition , in the outer layer body 3 of the lower part of the crotch C, the above-mentioned relationship of "the thermal conductivity of the first part 31 > the thermal conductivity of the second part 32" (the thermal insulation power value of the first part 31 > the thermal insulation power value of the second part 32) established. Specifically, the second outer layer sheet 3g is formed by intentionally making a part of the base non-woven fabric 36 contain a metal material, and the part containing the metal material is the first part 31, which does not contain the metal material (or the content of the metal material is higher than that of the first part 31). The part with less than 1 part 31) is the second part 32. For metallic materials, see above.

As the base nonwoven fabric 36 constituting the second outer layer sheet 3g, various nonwoven fabrics can be used, for example, hot air nonwoven fabrics, spunbond nonwoven fabrics, and spunbond-meltblown-spunbond (SMS) nonwoven fabrics, and one of them can be used alone or Use two or more of them in combination. The second outer layer sheet 3g (the base nonwoven fabric 36 ) may have a single-layer structure or a laminated structure. By including the non-woven fabrics in the second part 32 of the outer body 3, the thermal conductivity of the sensor-corresponding area 10 is locally improved, so that heat can be efficiently conducted to the sensor 8 installed in the sensor-corresponding area 10, Thereby, the detection sensitivity of the sensor 8 is improved. The basis weight of the second outer layer sheet 3g (base nonwoven fabric 36 ) is preferably 10 g/m ² or more, more preferably 12 g/m ² or more, in both the first part 31 and the second part 32 , and, It is preferably 30 g/m ² or less, more preferably 25 g/m ² or less.

The form shown in FIG. 27( b ) is the same as the form shown in FIG. 27( a ) except that the thicknesses of the first portion 31 (sensor-corresponding region 10 ) and the second portion 32 are different. In the form shown in FIG. 27( b ), the relationship of “thickness of the first portion 31 <thickness of the second portion 32 ” is established. More specifically, in the first portion 31 and the second portion 32 , the first The thickness of the outer layer sheet 3f is the same, but the thickness of the second outer layer sheet 3g (the base nonwoven fabric 36) is thinner than the latter. As described above, in the form shown in FIG. 27( b ), in order to make the above-mentioned “thermal conductivity of the first part 31 > thermal conductivity of the second part 32 ” (the first part 31 The relationship between the heat preservation power value > the heat preservation power value of the second part 32 ) is established, and the thickness of the first part 31 is made thinner than the second part 32 in addition to the metal material contained in the first part 31 . Therefore, in the form shown in FIG. 27(b), compared with the form shown in FIG. 27(a) in which the thicknesses of the first portion 31 and the second portion 32 are not substantially different, the thermal conductivity of the first portion 31 is higher. high, it is expected to further increase the sensitivity of the sensor 8 . Making the thickness of the first portion 31 thinner than that of the second portion 32 can be implemented, for example, by compressing only the first portion 31 in the thickness direction.

In the form shown in FIG. 27( c ), the second outer layer sheet 3 g is composed of a base nonwoven fabric 37 having irregularities on the surface, and the irregularities are formed on the non-skin-facing surface (outer surface of the diaper 102 ) of the outer layer body 3 In the above, it is different from the form shown in FIG. 27(b) which does not have such unevenness substantially. If concavities and convexities are formed on the non-skin facing surface of the outer layer body 3 as described above, the thickness of the outer layer body 3 can be made thicker than the case where the concavities and convexities are not formed, so that the sensor correspondence can be effectively created. The difference in thermal conductivity between the area 10 and the non-sensor corresponding area, as a result, the specific effect of the present invention will be more reliably exhibited. The base non-woven fabric 37 is basically the same as the above-described base non-woven fabric 36 except that the surface has irregularities. The convex portion constituting the unevenness on the surface of the base nonwoven fabric 37 may be a solid structure filled with fibers, or a hollow structure having a space of a certain size without being filled with fibers.

The forms shown in FIGS. 27( d ) to 27( g ) are common in that the first portion 31 includes the melt-blown layer 38 . The so-called "melt-blown layer" here refers to a fiber layer (spinning straight knot) formed by spinning the thermoplastic resin heated and melted by the so-called melt-blown method, and then stacking it on a conveyor for non-woven fabric formation. type nonwoven layer). In the melt blowing method, the molten resin sprayed from the nozzle of the spinning head is blown by a jet of high temperature gas, and then chopped to form extremely fine cotton-like fibers. Therefore, the obtained meltblown layer is typically a layer of nonwoven fabric formed of ultrafine fibers having a fiber diameter of 10 μm or less. The constituting fibers are typically composed of long fibers having a fiber length of 30 μm or more. In addition, the fiber spacing is also small. The texture and leak resistance of the meltblown layer are excellent. By forming the first part 31 to include the meltblown layer 38 having such characteristics, the risk of exudation of excrement can be reduced, and it is easier to achieve high sensitivity of the sensor 8 installed in the sensor-corresponding area 10 . As long as the meltblown layer 38 includes the meltblown layer, it may have a single-layer structure or a laminated structure formed by laminating multiple layers, and in the latter case, layers other than the meltblown layer may be laminated. The basis weight of the meltblown layer 38 in the first part 31 and the second part 32 is preferably 5 g/m ² or more, more preferably 8 g/m ² or more, and preferably 20 g/m ² or less, more preferably 30 g/m ² or less.

As a preferable example of the meltblown layer 38, the following meltblown nonwoven fabric i can be exemplified. Melt-blown non-woven fabric i: It is a melt-blown non-woven fabric with an average fiber diameter of 4 μm or less, along the plane of the above-mentioned melt-blown non-woven fabric and the first direction with the highest straight rate of fibers and the second direction orthogonal to the above-mentioned first direction. The straight rate of fiber is above 35%. Melt-blown non-woven fabrics have a straight-forward rate of more than 35% in the first direction with the highest fiber straight-forward rate and in the second direction orthogonal to it, so even if deformed, it is not easy to produce gaps between fibers, which can suppress water pressure resistance. the decline. The details of the meltblown nonwoven fabric i are described in Japanese Patent Laid-Open No. 2019-112757, and in the present invention, the technology related to the meltblown nonwoven fabric i described in the publication can be adopted as appropriate.

As another preferable example of the melt-blown layer 38, the following melt-blown nonwoven fabric ii can be exemplified. Meltblown non-woven fabric ii: It has a laminated structure of a meltblown layer and a protective layer superimposed thereon, and the laminated structure has a raised area in which the fibers of the meltblown layer woven into the protective layer are 2.5 fibers/mm or more. In the meltblown nonwoven fabric ii, due to the presence of the above-mentioned raised area, even if the amount of fibers is not increased excessively, a part of the fibers of the meltblown nonwoven fabric will stand up, and the space between the fibers of the meltblown nonwoven fabric ii will be buried. Therefore, the through-holes in the thickness direction of the melt-blown nonwoven fabric ii are blocked, so that it can have high leak-proofness without sacrificing flexibility.

In the meltblown nonwoven fabric ii, typically, the protective layer is disposed on the non-skin facing side of the meltblown layer, and in the case of using the meltblown nonwoven fabric ii for the outer layer body 3 of the diaper 102, the protective layer is disposed on a relatively The meltblown layer is on the far side of the wearer's skin. In the meltblown nonwoven fabric ii, the protective layer is a layer that enhances the strength and the like of the meltblown layer, and is composed of, for example, a spunbond layer. The so-called "spunbond layer" here refers to a layer of non-woven fabrics produced by the so-called spunbond method. Similar to the meltblown layer, the thermoplastic resin that has been heated and melted is spun and then deposited on the conveyance. The fiber layer formed on the device. However, in the spunbond method, the molten resin ejected from the spinning nozzle (nozzle) is cooled and stretched to form fibers. The obtained spunbond layer is a fiber layer formed of fibers (filaments) having a larger fiber diameter and longer fiber length than those of the meltblown layer. The laminated structure of the meltblown layer and the spunbond layer as a protective layer can be produced by, for example, a method of integrating the two by applying heat embossing after laminating the spunbond layer after the meltblown layer. Typically, the meltblown non-woven fabric ii has an embossed portion formed by joining the meltblown layer and the protective layer (a region obtained by densifying the constituent fibers of the fiber layer by hot embossing), and other than the embossed portion. Non-embossed part. Meltblown nonwoven ii preferably has a non-perforated area in the above-mentioned non-embossed portion, and the non-perforated area does not have “when the meltblown nonwoven ii is viewed from above, the included diagonal length is 10 μm, and the area is ²⁵ μm or more. The inter-fiber space in the rectangular region is the region where the through hole penetrates in the thickness direction. The details of the meltblown nonwoven ii are described in Japanese Patent Laid-Open No. 2019-209121, and in the present invention, the technology related to the meltblown nonwoven ii described in this publication can be adopted as appropriate.

In the form shown in FIG.27(d), the 1st outer-layer sheet 3f consists of the moisture-permeable film 35, and the 2nd outer-layer sheet 3g consists 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 all the through holes 33 It is covered with the 2nd outer-layer sheet 3g (meltblown layer 38) arrange|positioned at the non-skin opposing surface side of this sheet 3f. Therefore, in the form shown in FIG. 27( d ), the through holes 33 are not exposed on the non-skin facing surface (outer surface of the diaper 102 ) of the outer layer body 3 of the lower crotch portion C, and the non-skin facing surface of the outer layer body 3 is visually observed. The through-hole 33 is hidden under the 2nd outer-layer sheet 3g, and cannot be visually recognized. In the form shown in FIG. 27( d ), the first portion 31 includes the through hole 33 , so the thickness is thinner than that of the second portion 32 without the through hole, whereby the above-mentioned “thermal conductivity of the first portion 31 > the second portion The relationship of thermal conductivity of 32" (the thermal insulation power value of the first part 31 > the thermal insulation power value of the second part 32) is established. On the other hand, the through-holes 33 of the first part 31 are covered by the melt-blown layer 38 which forms the non-skin facing surface of the outer layer body 3 and is excellent in leakage resistance, so that the excrement absorbed and retained by the absorber 4 can be effectively prevented from passing through. The first part 31 bleeds out to the outside. In the form shown in FIG. 27( d ), the first part 31 (the part of the meltblown layer 38 corresponding to the first part 31 ) may also contain metal materials. Including the interaction between the two, the thermal conductivity of the first portion 31 is further improved, and thus the sensor 8 can be expected to be further increased in sensitivity.

The forms shown in Fig. 27(e) to Fig. 27(g) are modified examples of the form shown in Fig. 27(d), and can be applied to the configuration of the form shown in Fig. 27(d) unless otherwise specified. applied to these forms. 27 (e) - FIG. 27 (g) The structure shown in FIG. 27 (d) is applicable to the structure which is not specifically demonstrated as appropriate.

In the form shown in FIG.27(e), the 1st outer-layer sheet 3f consists of the melt-blown layer 38, and the 2nd outer-layer sheet 3g consists of the base material nonwoven fabric 36 which has substantially no unevenness|corrugation on the non-skin opposing surface. The second outer layer sheet 3g (base nonwoven 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 holes 33 of the second outer layer sheet 3g are exposed, and the non-skin facing surface of the outer layer body 3 can be visually recognized. However, since the melt-blown layer 38 is interposed between the absorber 4 and the through holes 33 , there is no need to worry about excretion absorbed and held by the absorber 4 to the outside through the first portion 31 . In the form shown in FIG. 27( f ), the second outer layer sheet 3 g is composed of a base nonwoven fabric 37 having irregularities on the surface, and the irregularities are formed on the non-skin-facing surface (outer surface of the diaper 102 ) of the outer layer body 3 It is different from the form shown in FIG. 27(e) which does not have such unevenness substantially. In the form shown in FIG. 27( g ), the lamination order of the laminated structure of the outer layer body 3 is opposite to that in the form shown in FIG. 27( f ). The outer layer sheet 3g is composed of the meltblown layer 38 . The first outer layer sheet 3f (base nonwoven fabric 37 ) has through holes 33 penetrating through the sheet 3f in the thickness direction at a position corresponding to the first portion 31 (sensor corresponding region 10 ), and all of the through holes 33 It is covered with the 2nd outer-layer sheet 3g (meltblown layer 38) arrange|positioned at the non-skin opposing surface side of this sheet 3f. In the form shown in Fig. 27(e) to Fig. 27(g), the same effect as the form shown in Fig. 27(d) can be exhibited.

In the diaper 102 of the seventh embodiment and the eighth embodiment, the sensor 8 attached to the sensor corresponding region 10 includes a sensor capable of detecting temperature. This may not be the case, and the sensor 8 may include a sensor (humidity sensor) capable of detecting the humidity of the portion of the diaper 102 overlapping the sensor 8 in plan view. The sensor 8 may also detect information other than humidity. As information other than humidity, temperature is mentioned, for example. Unless otherwise specified, the following describes the preferred configuration of the diaper 102 of the seventh embodiment and the eighth embodiment when the sensor 8 includes a sensor capable of detecting humidity. The configuration of the sensor 8 including a sensor capable of detecting humidity which is not particularly described is applicable to the description of the above-mentioned diaper 102 as appropriate.

The number of the sensors 8 installed in the sensor corresponding area 10 is not particularly limited. When the number of the sensors 8 installed in the sensor-corresponding area 10 is one, the one sensor 8 is a humidity sensor capable of detecting at least the humidity of the diaper 102 . When the number of sensors 8 installed in the sensor-corresponding area 10 is plural, as long as at least one of the plural sensors 8 can function as a humidity sensor. For example, a humidity sensor and a temperature sensor for detecting temperature can also be installed as the sensor 8 in the sensor-corresponding area 10 .

In the case where the sensor 8 includes a sensor capable of detecting humidity, the sensor 8 includes a sensing portion (not shown) for detecting humidity, a battery (not shown) for supplying power to the sensing portion, and a The casing 81 which houses the corresponding box. The sensor 8 detects the humidity of the diaper 102 and other information about the diaper 102 in a specific period, and transmits the information to a communication terminal device (not shown) located at a distance from the sensor 8 in a specific period.

When the sensor 8 includes a sensor capable of detecting humidity, the diaper 102 is preferably in the outer layer body 3 of the lower part of the crotch C, and the first part 31 of the sensor corresponding area 10 is disposed on the non-skin facing surface The air permeability is higher than that of the second portion 32 of the non-skin facing surface without the sensor corresponding area 10 . As an indicator of air permeability, air permeability resistance can be used. A lower resistance to ventilation means a larger volume of air passing through per unit time and per unit area, and therefore means higher ventilation. Conversely, a higher resistance to air permeability means a smaller volume of air passing through per unit time and per unit area, and therefore means lower air permeability. That is, in the diaper 102, the air permeability resistance of the first part 31 is lower than that of the second part 32.

Improve the air permeability of the outer layer body 3 and improve the detection sensitivity of the sensor 8 installed in the outer layer body 3 to detect the humidity in the diaper 102. Risk of bad condition that the outer layer body 3 oozes out to the outside. On the other hand, if only the thickness of the first part 31 is selectively made thinner than the second part 32 in the outer layer body 3 to form a part with high air permeability, it is possible to prevent the outer layer body 3 (the first part 31 from increasing) ), the air permeability of ) may cause the occurrence of bad conditions (exudation of excrement through the outer layer body 3, etc.), and the high sensitivity of the sensor 8 can be realized, and as a result, the sensor 8 can be detected with high accuracy. to the excretion of the wearer of the diaper 102.

Furthermore, the relationship of the above-mentioned "air permeability of the first part 31 > the air permeability of the second part 32" in the outer layer body 3 of the lower crotch C can be more reliably exhibited, that is, the above-mentioned "air resistance of the first part 31 <the second part" From the viewpoint of the effect brought about by the establishment of the relationship between the ventilation resistance of the within the above range.

The air permeability can be adjusted by adjusting the density of the outer layer body 3, the distance between fibers constituting the fiber, and the like. As a method of establishing the above-mentioned relationship of "air permeability of the first part 31 > air permeability of the second part 32" in the outer layer body 3 of the lower part of the crotch C, the first part 31 is made of a material with high air permeability ( For example, the method of using a raw material with relatively low fiber density) and the method of using a raw material with low air permeability (such as a raw material with relatively high fiber density, a resin film) for the second part 32, or a combination of the two methods can be used.

Moreover, the air permeability of the 1st part 31 can also be improved by forming the 1st part 31 using the said elastic sheet. By forming the first part 31 with a stretchable sheet, when the absorber 4 absorbs excretion such as urine and the absorber 4 expands, the absorber 4 pushes the stretchable sheet to the non-skin-opposing surface side after the expansion. By pressing, the stretchable sheet is stretched, the distance between the fibers of the stretchable sheet is increased, and the air permeability is improved. In this way, when the wearer urinates, the air permeability of the first part 31 is improved, so that it is easier to realize the high sensitivity of the sensor 8 .

The first portion 31 of the outer layer body 3 has liquid impermeability or liquid impermeability. By making the first portion 31 impermeable to liquid or impermeable to liquid, it is possible to effectively prevent the occurrence of inconveniences that may be caused by increasing the air permeability of the first portion 31 . Furthermore, in the present invention, as long as at least the first part has liquid impermeability or liquid impermeability, the second part may or may not have liquid impermeability or liquid impermeability. From the viewpoint of more effectively preventing the occurrence of exudation of excrement through the outer layer body 3, etc., it is preferable that the second part also has liquid impermeability or liquid impermeability.

The above-mentioned water pressure resistance can be used as an index for determining whether or not the outer layer body 3 (the first part 31 and the second part 32 ) has liquid impermeability or liquid impermeability. When the water pressure resistance of the evaluation target sheet is preferably 1000 mmAq. or more, and more preferably 1500 mmAq. or more, the sheet can be evaluated as having liquid impermeability or liquid impermeability. The water pressure resistance can be measured by the above-mentioned method.

From the viewpoint of establishing the above-mentioned relationship of "air permeability of the first part 31 > air permeability of the second part 32" in the outer layer body 3 of the lower part of the crotch C, it is preferable that the first part 31 and the second part 32 are composed of The fiber sheet is constituted, and the density of fibers in the first part 31 (hereinafter, also referred to as "fiber density") is lower than that in the second part 32 . That is, as one of means for establishing the relationship between the magnitudes of the air permeability, the relationship "fiber density of the first part 31 <fiber density of the second part 32" can be established, for example.

The ratio of the thickness of the first part 31 to the thickness of the second part 32 takes into account the advantages (improved air permeability) and disadvantages (decreased strength of the first part 31 , etc.) brought about by the thinning of the former, under the premise of the former < the latter , in terms of the former/the latter, is preferably 0.01 or more, more preferably 0.05 or more, and is preferably 0.80 or less, more preferably 0.50 or less. The fiber density of the first part 31 is preferably 0.01 g/cm ³ or more, more preferably 0.03 g/cm ³ or more, and more preferably 0.30 g/cm ³ or less, more preferably 0.20 g/cm ³ or less. The fiber density of the second part 32 is preferably 0.01 g/cm ³ or more, more preferably 0.03 g/cm ³ or more, and more preferably 0.30 g/cm ³ or less, more preferably 0.20 g/cm ³ or less. Here, the fiber density of the outer layer body 3 (1st part 31, 2nd part 32) is obtained by measuring the outer layer body taken out from the absorbent article by the following method.

<Preparation method of measuring sheet for measuring fiber density> A test piece for measuring fiber density was prepared according to the following procedure. That is, in an environment of 22°C and 65% RH, use a sharp blade to cut the sheet to be measured into a machine direction (Machine Direction) of 1 cm, and the machine transverse direction (Cross Direction) of the sheet is 1 cm. size measurement piece. Then, the measurement pieces were cut out at two places per sheet. Do this for 5 sheets. Fiber density measurement was performed on the 10 measurement pieces thus obtained by the following method. <Measuring method of fiber density> The fiber density was measured as follows. First, using a "microscope" (manufactured by KEYENCE Co., Ltd., VHX-1000), the thickness of each measurement sheet obtained by the above-mentioned <Method for preparing measurement sheet for measuring fiber density> was measured. Next, the basis weight of each measurement piece was measured, and the value of basis weight/thickness was calculated. The average value of the basis weight/thickness value of each measurement piece was taken as the fiber density. When the measurement piece has a multilayer structure, the basis weight of the measurement piece is measured according to the following operation. When the measurement sheet is of multi-layer structure and each layer can be clearly identified, use cold spraying equal to the boundary of the layers to carefully separate the first surface of the first fiber layer from the second surface of the first fiber layer, or use a knife to cut the boundary. Then, after the mass of each layer is measured, the area of each separated layer is measured, and the weight per unit area of each layer is calculated from the quotient of the quotient. Then, the average value of the basis weight of each layer was taken as the basis weight of the measurement sheet. In the case where the measuring piece is of multi-layer structure, but no clear difference can be seen from the boundary of each layer visually, without separating the layers, directly measure the mass of the measuring piece, and then measure its area, and then use the The quotient calculates the basis weight of the measurement piece.

The method of establishing the above-mentioned relationship of "the fiber density of the first part 31 > the fiber density of the second part 32" in the outer layer body 3 of the lower crotch C is not particularly limited, except that in the first part 31 and the second part 32 In addition to the method of making the fiber density originally different (not accompanied by compression in the thickness direction of the former), for example, in the outer layer body 3 of uniform thickness, only the second part is compressed in the thickness direction by embossing. 32 method. In the outer layer body 3 obtained by the selective compression method, the uncompressed first portion 31 has lower fiber density and higher air permeability than the compressed second portion 32, but The compositions of the two are the same as each other.

As described above, the thermal conductivity of the first portion 31 is preferably higher than that of the second portion 32 . By establishing this relationship, the thermal conductivity of the sensor-corresponding region 10 on which the sensor 8 is mounted is improved, and heat is easily dissipated from the skin-opposing surface side to the non-skin-opposing surface side in the outer layer body 3, thereby enabling Reduce stuffiness. Furthermore, when the sensor 8 can detect temperature in addition to humidity, it is also expected that the detection sensitivity of the temperature can be improved. When the thermal conductivity of the first part 31 is higher than that of the second part 32, the ratio of the thermal insulation power values of the first part 31 and the second part 32 and the thermal insulation power values of the first part 31 and the like are preferably within the above-mentioned range. The holding power value can be measured by the above-mentioned measuring method.

An equivalent view of FIG. 27 is shown in FIG. 28, which is a cross-section of the lower portion C of the crotch in the thickness direction of the modified example of the diaper 102. As shown in FIG. In FIG. 28 , the same reference numerals are assigned to the same components as those in FIG. 27 , and the descriptions of FIG. 27 are applied as appropriate for the components that are not particularly described. In the form shown in FIG. 28( a ), the second outer layer sheet 3g 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 holes 33 of the second outer layer sheet 3g are exposed, and the non-skin facing surface of the outer layer body 3 can be visually recognized. However, since the 1st outer-layer sheet 3f is interposed between the absorber 4 and the through-hole 33, there is no need to worry about excretion absorbed and held by the absorber 4 to the outside through the first part 31. About the 1st part 31 and the 2nd part 32 of the 2nd outer-layer sheet 3g, the nonwoven fabric which comprises this part may be the same or different.

The form shown in Fig. 28(b) is the same as the form shown in Fig. 28(a) except that the second outer layer sheet 3g does not have through holes. In the form shown in FIG. 28( b ), the base nonwoven fabric 36 also exists in the first portion 31 . In the form shown in FIG. 28(b), the fiber densities of the first part 31 and the second part 32 are different. Due to the difference in fiber density, the air permeability of the first part 31 in the outer layer body 3 in the lower part of the crotch C is > Part 2 32 "Breathability" relationship is established. Specifically, the fiber density of the first portion 31 is lower than the fiber density of the second portion 32 .

In the form shown in FIG. 28( c ), the second outer layer sheet 3 g is composed of a base nonwoven fabric 37 having irregularities on the surface, and the irregularities are formed on the non-skin-facing surface (outer surface of the diaper 102 ) of the outer layer body 3 On the other hand, it is different from the form shown in FIG. 28(b) which does not have such unevenness substantially. As an advantage of forming the unevenness on the non-skin-facing surface of the outer layer body 3 as described above, the unevenness increases the thickness of the nonwoven fabric. Thereby, the difference in thermal conductivity between the sensor-corresponding region 10 and the regions other than the sensor-corresponding region 10 can be effectively created.

The forms shown in FIGS. 28( d ) to 28( g ) are common in that the first portion 31 includes the melt-blown layer 38 . In the form shown in FIG. 28( d ), the first portion 31 includes the through hole 33 , so the thickness is thinner than that of the second portion 32 without the through hole, so that the above-mentioned “air permeability of the first portion 31 > the second portion 32 "Breathability" relationship is established. On the other hand, the through-holes 33 of the first part 31 are covered by the melt-blown layer 38 which forms the non-skin facing surface of the outer layer body 3 and is excellent in leakage resistance, so that the excrement absorbed and retained by the absorber 4 can be effectively prevented from passing through. The first part 31 bleeds out to the outside.

As described above, the seventh embodiment and the eighth embodiment of the present invention are not limited to the above-mentioned embodiments, and may be modified as appropriate. For example, in the underpants-type disposable diaper 102B, the outer material 30 has a continuous shape such as an hourglass shape over the abdominal part A, the lower crotch part C, and the back part B, as shown in FIG. 24 , but this may not be the case. The outer covering material 30 is configured as follows: the outer covering material 30 includes a ventral outer covering material arranged on the wearer's belly, a crotch outer covering arranged at the wearer's crotch, and a back covering arranged at the back of the wearer. side outer materials, and the outer materials are joined to each other at the ends in the longitudinal direction X thereof. The structures of the above-mentioned outer materials may be the same or different from each other. Alternatively, the outer material 30 may have the above-mentioned ventral outer material and the above-mentioned back outer material, but not the above-mentioned crotch outer material, and the article body 50 may be erected and fixed to both outer materials. Only the parts of the above-mentioned one embodiment can be used for each other as appropriate.

Furthermore, the absorbent articles according to the first to eighth embodiments widely include articles for absorbing bodily fluids (urine, soft stool, menstrual blood, sweat, etc.) discharged from the human body, and in addition to the above-mentioned disposable diapers, for example, menstrual periods are also included. Sanitary napkins, menstrual underwear, incontinence pads, etc. Furthermore, the absorbent article or the disposable diaper of the present invention may employ each of the structures of the first to eighth embodiments alone, or may be employed in combination. For example, the disposable diaper of the present invention may include the outer sheet 18 marked with the mark 300 on the non-skin-opposing surface, and the absorber 4 having the high liquid permeation portion 43 in the portion overlapping the mark 300, and the A sensor bag 15 is formed in a part of the overlapping area 14 of the first non-woven fabric 12 and the second non-woven fabric 13 of the outer sheet 18 , and the sensor bag 15 is a sensor-corresponding area for installing the sensor 8 10. On the non-skin facing surface of the outer layer body 3 with the outer sheet 18, the thermal conductivity or air permeability of the first part 31 of the region 10 corresponding to the sensor is arranged compared with that of the region 10 not provided with the sensor. Part 2 32 high. The "outside sheet 18" of the second to sixth embodiments is disposed on the non-skin-facing surface side from the absorbent body 5 including the surface sheet 21, the absorber 4, and the leak-proof sheet 23, As a member formed by a laminate of a plurality of sheets, the "outer layer body 3" of the seventh embodiment and the eighth embodiment is a member disposed on the non-skin-facing surface side of the absorber 4 . The outer sheet 18 is included in the constituent members of the outer layer body 3 .

Regarding the embodiments of the present invention described above, the following absorbent articles or change detection methods are further disclosed.

<1> An absorbent article having a liquid-retaining absorbent body, having a longitudinal direction corresponding to the front-rear direction of the wearer, and a transverse direction perpendicular to the longitudinal direction, and Marked on the non-skin-opposite side of the above absorbent article, The said absorber has the high liquid permeation|transmission part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark.

<2> The absorbent article according to the above-mentioned <1>, wherein the mark indicates the installation position of the urination sensor for detecting urination of the wearer. <3> The absorbent article according to the above-mentioned <1> or <2>, wherein the absorbent body has a pair of low-liquid-permeable parts with a liquid permeability lower than that of the high-liquid-permeable part, and the high-liquid-permeable part is located in the above-mentioned high-liquid-permeable part. between the pair of low liquid permeation parts in the lateral direction. <4> The absorbent article according to any one of the above <1> to <3>, which has a lower crotch portion disposed on the crotch portion of the wearer, and a ventral portion extending forward and backward from the lower crotch portion And the back part, and the above-mentioned mark is located in the center of the above-mentioned transverse direction of the above-mentioned lower part of the crotch, and is divided into two parts when the above-mentioned longitudinal center line of the above-mentioned absorbent article is divided into two equal parts and extends along the transverse direction. When the front body of the wearer is on the ventral side and the back body of the wearer is arranged on the back of the wearer, the above marks are located on the front body. <5> The absorbent article according to any one of the above <1> to <4>, wherein the absorber includes an absorptive core, and the high liquid permeation portion extends over the entire thickness direction of the absorptive core or In some areas, there is a space where the material forming the absorbent core does not exist. <6> The absorbent article according to the above <5>, wherein the high liquid permeation portion is a through hole in which the material for forming the absorbent core does not exist. <7> The absorbent article according to the above <5>, wherein the high liquid permeation portion is a low basis weight portion in which the forming material of the absorbent core is present, and the thickness D1 of the space in which the forming material does not exist is relative to The thickness D of the above-mentioned absorbent core is 5% or more, preferably 10% or more, and 80% or less, preferably 70% or less, and 5% or more and 80% or less, preferably 10% Above 70%. <8> The absorbent article according to the above-mentioned <5> or <6>, wherein the absorber has a low liquid permeation portion having a lower liquid permeability than the high liquid permeation portion, and the high liquid permeation portion has the above-mentioned absorption In the low basis weight part of the material for forming the core body, the basis weight of the high liquid permeation part is 5% or more, preferably 10% or more, and 80% or less relative to the basis weight of the low liquid permeation part, Preferably it is 70% or less, and it is 5% or more and 80% or less, more preferably 10% or more and 70% or less. <9> The absorbent article according to the above <8>, wherein the basis weight of the material forming the absorbent core in the high liquid permeation portion is more than 0 g/m ² , preferably 10 g/m ² or more , and 350 g/m ² or less, preferably 250 g/m ² or less, and more than 0 g/m ² and 350 g/m ² or less, preferably 10 g/m ² or more and 250 g/m 2 m ² or less. <10> The absorbent article according to any one of the above <5> to <9>, wherein in the space where the material for forming the absorptive core does not exist, a space holding made of a non-absorbent material is arranged material.

<11> The absorbent article according to the above <10>, wherein the space-retaining material is formed of a non-absorbent material, and the non-absorbent material is a fibrous mass or a bulky nonwoven fabric containing hydrophobic fibers. <12> The absorbent article according to the above <11>, wherein the apparent density of the bulky nonwoven fabric is 0.01 g/cm ³ or more, preferably 0.02 g/cm ³ or more, and 0.30 g/cm ³ or less, Preferably it is 0.20 g/cm ³ or less, and it is 0.01 g/cm ³ or more and 0.30 g/cm ³ or less, preferably 0.02 g/cm ³ or more and 0.20 g/cm ³ or less. <13> The absorbent article according to the above <11>, wherein the apparent density of the fiber mass is 0.01 g/cm ³ or more, preferably 0.02 g/cm ³ or more, and 0.30 g/cm ³ or less, Preferably it is 0.20 g/cm ³ or less, and it is 0.01 g/cm ³ or more and 0.30 g/cm ³ or less, preferably 0.02 g/cm ³ or more and 0.20 g/cm ³ or less. <14> The absorbent article according to any one of the above <10> to <13>, wherein the ratio of the space occupied by the space holding material in the liquid permeation space of the high liquid permeation portion is 5% or more , is preferably 10% or more, and is 100% or less, preferably 95% or less, and is 5% or more and 100% or less, preferably 10% or more and 95% or less. <15> The absorbent article according to any one of the above <1> to <14>, wherein no water-absorbent polymer is present in the high liquid permeation portion. <16> The absorbent article according to any one of the above <1> to <15>, wherein the absorber includes an absorptive core, and the basis weight of the forming material having the absorptive core is higher than that of the transverse direction. An elongated high liquid permeation portion having lower portions on both sides and a width in the lateral direction narrower than the high liquid permeation portion, the elongated high liquid permeation portion is continuous with the high liquid permeation portion in the longitudinal direction. <17> The absorbent article according to the above-mentioned <16>, wherein the high liquid permeation portion is a low basis weight portion of the material for forming the absorbent core, and the base of the material for the formation of the elongated high liquid permeation portion is present The weight is lower than the above-mentioned high liquid permeation part. <18> The absorbent article according to the above-mentioned <16> or <17>, wherein the elongated and highly liquid-permeable portion is a through groove (slit) in which the material for forming the absorbent core does not exist. and The basis weight of the material for forming the absorbent core in the elongated high liquid permeation portion is 80% or less, preferably 70% relative to the basis weight of the material for forming the absorbent core in the high liquid permeation portion Hereinafter, it is 0% or more, preferably 10% or more, and also 0% or more and 80% or less, preferably 10% or more and 70% or less. <20> The absorbent article according to any one of the above <16>, <17> and <19>, wherein the basis weight of the material for forming the absorbent core in the elongated high liquid permeation portion is 0 g /m ² or more, preferably 10 g/m ² or more, and 300 g/m ² or less, preferably 200 g/m ² or less, and 0 g/m ² or more and 300 g/m ² or less , preferably 10 g/m ² or more and 200 g/m ² or less. <21> The absorbent article according to any one of the above <16> to <20>, wherein the total length L3 in the longitudinal direction of the high liquid permeability portion and the elongated high liquid permeability portion is relative to the absorbent core The above-mentioned vertical full length L5 (L3/L5) is 1% or more, preferably 5% or more, and 95% or less, preferably 90% or less, and 1% or more and 95% or less, preferably More than 5% and less than 90%.

<22> The absorbent article according to any one of the above <16> to <21>, wherein the width W3 of the elongated high liquid permeation portion is relative to the maximum length W1 in the transverse direction of the high liquid permeation portion (W3/W1), 2% or more, preferably 5% or more, and 75% or less, preferably 50% or less, and 2% or more and 75% or less, preferably 5% or more and 50% or less. <23> The absorbent article according to any one of the above-mentioned <16> to <22>, which has a lower crotch portion disposed on the wearer's crotch portion, and a ventral portion and a back side extending forward and backward from the lower crotch portion Department, and The above-mentioned absorber has the above-mentioned elongated high-liquid-permeable part before and after the above-mentioned longitudinal direction of the above-mentioned high-liquid-permeable part, The length in the longitudinal direction of the elongated high liquid permeation portion located on the back side portion bounded by the high liquid permeation portion is longer than the elongated high liquid permeation portion located on the ventral side with the high liquid permeation portion as a boundary . <24> The absorbent article according to any one of the above <1> to <23>, wherein the mark is indicated so that the outer surface of the absorbent article before urination can be recognized. <25> The absorbent article according to the above-mentioned <24>, wherein the above-mentioned mark is an indication that the outer surface of the above-mentioned absorbent article does not change in color before and after urination. <26> The absorbent article according to any one of the above <1> to <25>, wherein the mark is in the shape of a combination of characters, graphics, symbols, or the like. <27> The absorbent article according to the above <26>, wherein the characters are hiragana, katakana, uppercase English letters, lowercase English letters, Arabic numerals, Roman numerals, various foreign characters, or a combination thereof. <28> The absorbent article according to the above-mentioned <26> or <27>, wherein the above-mentioned characters include deformed characters. <29> The absorbent article according to any one of the above <26> to <28>, wherein the figure includes a geometric shape consisting of any one or two or more of a circle, a triangle, a quadrangle, and a polygon. <30> The absorbent article according to the above-mentioned <29>, wherein the polygon is a polygon or a regular polygon whose corners are arcuate or non-arc. <31> The absorbent article according to any one of the above <1> to <25>, wherein the mark includes any one of animals, vehicles, food, plants, animals, characters, musical notes, stars, rainbows, clouds and musical instruments One or more patterns composed of two kinds. <32> The absorbent article according to the above <31>, wherein the mark is a combination of a plurality of patterns.

<33> The absorbent article according to any one of the above <1> to <32>, wherein the mark includes any one or both of a straight line and a curved line. <34> The absorbent article according to any one of the above <1> to <33>, wherein the mark indicates the installation position of the urination sensor for detecting urination of the wearer, The urination sensor has a sensor outer surface portion on the opposite side of the side contacting with the outer surface of the absorbent article, In a state where the urination sensor is attached to the position of the mark on the absorbent article, the mark is integrated with the outer surface portion of the sensor, and is arranged so as to form a specific pattern. <35> The absorbent article according to any one of the above <1> to <34>, wherein the mark indicates an installation position of a urination sensor for detecting urination of the wearer, and the shape of the mark is the same as that of the urination sensor. The top view is similar in shape. <36> The absorbent article according to any one of the above <1> to <35>, wherein the absorber includes an absorptive core, and The area of the high liquid permeation portion is 0.05% or more, preferably 0.1% or more, and 10% or less, preferably 7% or less, and 0.05% or more, preferably 7% or less, and 0.05% or more. 10 % or less, preferably 0.1% or more and 7% or less. <37> The absorbent article according to any one of the above <1> to <36>, wherein the absorber includes an absorptive core, and The maximum length L1 in the longitudinal direction of the high liquid permeation portion is 1.5% or more, preferably 3% or more, and 20% or less, preferably Preferably it is 10% or less, and it is 1.5% or more and 20% or less, More preferably, it is 3% or more and 10% or less. <38> The absorbent article according to any one of the above <1> to <37>, wherein the absorber includes an absorptive core, and The maximum length W1 in the transverse direction of the high liquid permeation portion is 3% or more, preferably 5% or more, and preferably 40% or less with respect to the maximum length W5 (W1/W5) in the transverse direction of the absorptive core. , preferably 30% or less, and 3% or more and 40% or less, preferably 5% or more and 30% or less. <39> The absorbent article according to any one of the above <1> to <38>, wherein the maximum length L1 in the longitudinal direction of the high liquid permeation portion is 15 mm or more, preferably 20 mm or more, or 50 mm Hereinafter, it is preferably 40 mm or less, and more preferably 15 mm or more and 50 mm or less, preferably 20 mm or more and 40 mm or less. <40> The absorbent article according to any one of the above <1> to <39>, wherein the maximum length W1 in the lateral direction of the high liquid permeation portion is 15 mm or more, preferably 20 mm or more, and 50 mm Hereinafter, it is preferably 40 mm or less, and more preferably 15 mm or more and 50 mm or less, preferably 20 mm or more and 40 mm or less. <41> The absorbent article according to any one of the above <1> to <40>, which is a disposable diaper.

<A1> The absorbent article according to any one of the above <1> to <41>, comprising a topsheet located on the skin-opposing surface side and an outer sheet located on the non-skin-opposing surface side, and the topsheet is The above-mentioned absorber is arranged between the material and the outer sheet, The above-mentioned outer sheet, as the outermost constituent material of the absorbent article, has a first non-woven fabric and a second non-woven fabric arranged in a state of being partially or completely overlapped on the non-skin-facing surface side of the first non-woven fabric, In a part of the overlapping area where the first non-woven fabric and the second non-woven fabric overlap, the first non-woven fabric and the second non-woven fabric are not joined, and a sensor that can be arranged inside to detect changes that occur on the absorbent article is formed. bag, The above-mentioned overlapping area has a fixed area formed by joining the first non-woven fabric and the second non-woven fabric in three directions around the sensor bag, and in the remaining one direction, an insertion port for the above-mentioned sensor is formed, 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 bag is formed in the overlapping region.

<A2> An absorbent article comprising a surface sheet located on the skin-opposite side, an outer sheet located on a non-skin-opposite side, and an absorber disposed between the surface sheet and the outer sheet, The above-mentioned outer sheet, as the outermost constituent material of the absorbent article, has a first non-woven fabric and a second non-woven fabric arranged in a state of being partially or completely overlapped on the non-skin-facing surface side of the first non-woven fabric, In a part of the overlapping area where the first non-woven fabric and the second non-woven fabric overlap, the first non-woven fabric and the second non-woven fabric are not joined, and a sensor that can be arranged inside to detect changes that occur on the absorbent article is formed. bag, The above-mentioned overlapping area has a fixed area formed by joining the first non-woven fabric and the second non-woven fabric in three directions around the sensor bag, and in the remaining one direction, an insertion port for the above-mentioned sensor is formed, 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 bag is formed in the overlapping region.

＜A3＞ The absorbent article according to the above <A1> or <A2>, wherein the sensor bag has a size in which the entire sensor can be arranged inside. ＜A4＞ The absorbent article according to any one of the above <A1> to <A3>, wherein at least one of the first non-woven fabric and the second non-woven fabric in the overlapping region has expansion and contraction in an area larger than the size of the sensor sex. ＜A5＞ The absorbent article according to any one of the above <A1> to <A4>, wherein the second nonwoven fabric has higher stretchability than the first nonwoven fabric over the entire area of the region where the sensor bag is formed in the overlapping region. ＜A6＞ The absorbent article according to any one of the above <A1> to <A5>, wherein the insertion opening extends in a direction orthogonal to a direction in which the sensor is inserted into the sensor pocket through the insertion opening open, and At least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has stretchability in the extending direction of the insertion opening. ＜A7＞ The absorbent article according to any one of the above <A1> to <A6>, wherein at least one of the first nonwoven fabric and the second nonwoven fabric is a stretchable nonwoven fabric, and The stretchable non-woven fabric is formed by integrating a plurality of elastic filaments extending in one direction without crossing each other and an extensible fiber layer. ＜A8＞ The absorbent article according to the above <A7>, wherein the first nonwoven fabric is a non-stretchable nonwoven fabric, and the second nonwoven fabric is a stretchable nonwoven fabric. ＜A9＞ The absorbent article according to the above <A8>, which has a longitudinal direction which is a direction from the front side of the wearer to the rear side when worn, and a transverse direction perpendicular to the longitudinal direction, and The maximum elongation in the transverse direction of the non-stretchable nonwoven fabric is less than 50%. <A10> The absorbent article according to any one of the above <A1> to <A9>, wherein at least one of the first non-woven fabric and the second non-woven fabric in the overlapping region is at the position on the side of the insertion opening of the sensor bag , and has an elastic member whose length is more than the length of the above-mentioned sensor. <A11> The absorbent article according to the above <A10>, wherein the length of the edge of the elastic member along the overlapping region for forming the insertion opening of the sensor is relative to the length of the elastic member disposed in the sensor bag. The length of the sensor in the same direction is preferably more than 100%, more preferably more than 105%, and more preferably more than 110%.

<A12> The absorbent article according to the above <A10> or <A11>, wherein the length of the elastic member along the edge of the overlapping region for forming the insertion opening of the sensor is relative to the insertion opening of the sensor The length in the same direction is preferably 100% or more, more preferably 105% or more, and more preferably 150% or less, more preferably 140% or less. ＜A13＞ The absorbent article according to any one of the above <A10> to <A12>, wherein the elastic member is disposed on the second nonwoven fabric. ＜A14＞ The absorbent article according to any one of the above <A1> to <A13>, which has a ventral portion disposed on the wearer's ventral side when worn, a back portion disposed on the wearer's backside, and the lower part of the crotch located between said ventral part and said dorsal part, and The insertion port of the said sensor of the said sensor bag is formed in the said ventral part side in the said overlapping area. ＜A15＞ The absorbent article according to the above <A14>, which has a ventral portion disposed on the wearer's ventral side when worn, a dorsal portion disposed on the wearer's backside, and the ventral portion and the above the lower part of the crotch between the back and the side, and In the top view of the above-mentioned overlapping area, the above-mentioned three directions are viewed from the central part of the above-mentioned sensor bag, which are the left and right directions and the above-mentioned back side direction, and the above-mentioned remaining one direction is observed from the central part of the sensor bag. , for the above-mentioned ventral direction. ＜A16＞ The absorbent article according to the above <A14> or <A15>, which has a ventral portion disposed on the wearer's ventral side when worn, a dorsal portion disposed on the wearer's backside, and the lower part of the crotch between the side part and the above-mentioned back side part, and The first nonwoven fabric has a portion arranged on the ventral portion and a portion arranged on the lower crotch portion, but does not have a portion arranged on the back portion, The second nonwoven fabric has a portion arranged on the back portion and a portion arranged on the lower crotch portion, but does not have a portion arranged on the ventral portion. ＜A17＞ The absorbent article according to any one of the above <A1> to <A13>, which has a ventral portion disposed on the wearer's ventral side when worn, a back portion disposed on the wearer's backside, and the lower part of the crotch located between said ventral part and said dorsal part, and The insertion part of the said sensor of the said sensor bag is formed in the said back side part side in the said overlapping area. ＜A18＞ The absorbent article according to the above <A17>, which has a ventral portion disposed on the wearer's ventral side when worn, a dorsal portion disposed on the wearer's backside, and the ventral portion and the above the lower part of the crotch between the back and the side, and In the top view of the above-mentioned overlapping area, the above-mentioned three directions are viewed from the central portion of the sensor bag, and are the left and right directions and the above-mentioned ventral portion direction, and the remaining one direction is viewed from the central portion of the sensor bag. , which is the above-mentioned back side direction. ＜A19＞ The absorbent article according to any one of the above <A1> to <A13>, which has a longitudinal direction which is a direction from the front side of the wearer to the rear side when worn, and a transverse direction perpendicular to the longitudinal direction, and The first non-woven fabric has a portion arranged on one side of the above-mentioned transverse direction, but does not have a portion arranged on the other side, The second non-woven fabric has a portion arranged on the other side of the above-mentioned horizontal 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 with the non-skin-facing surface side of the end region on the lateral center side of the first nonwoven fabric, and the overlapping portion of the first nonwoven fabric and the second nonwoven fabric is the overlapping region. . ＜A20＞ The absorbent article according to any one of the above <A1> to <A19>, wherein the fixed areas in the three directions in the overlapping area are at least fixed on both sides of the sensor bag across the sensor bag. The area also extends beyond the end of the overlapping area, and in a plan view of the overlapping area, the area of the sensor bag is less than half of the area of the overlapping area. <A21> The absorbent article according to any one of the above <A1> to <A20>, wherein the area of the sensor bag is preferably 50% or less of the area of the overlapping area in a plan view of the overlapping area, more It is preferably 40% or less, and more preferably 5% or more, more preferably 10% or more.

<A22> The absorbent article according to any one of the above <A1> to <A21>, wherein the maximum depth of the sensor bag is preferably 40 mm or more, more preferably 45 mm or more, and more preferably 100 mm or less, more preferably 80 mm or less. ＜A23＞ The absorbent article according to any one of the above <A1> to <A22>, which has a ventral portion disposed on the wearer's ventral side when worn, a back portion disposed on the wearer's backside, and the lower part of the crotch located between said ventral part and said dorsal part, and It has the direction from the front side of the wearer to the back side when wearing, namely the longitudinal direction, and the transverse direction orthogonal to the longitudinal direction, The sensor is preferably installed in the lower part of the crotch where the absorber exists inside the absorbent article, and is preferably installed in the central area of the lower part of the crotch in the lateral direction. ＜A24＞ The absorbent article according to any one of the above <A1> to <A23>, wherein the sensor bag is formed at a site overlapping with the absorber. ＜A25＞ The absorbent article according to any one of the above <A1> to <A24>, comprising an indicator for notifying urination by a color change, and the indicator is along the absorbent article corresponding to the front-back direction of the wearer The longitudinal extension of the sensor bag is formed at a position overlapping with the indicator. ＜A26＞ The absorbent article according to any one of the above <A1> to <A25>, wherein a sensor fixing material for fixing the sensor is arranged inside the sensor bag. ＜A27＞ The absorbent article according to any one of the above <A1> to <A26>, wherein the second nonwoven fabric in the overlapping region is provided with a mark indicating the position of the sensor bag. ＜A28＞ A method for detecting a change in an absorbent article, wherein the sensor is arranged in the sensor bag of the absorbent article according to any one of the above <A1> to <A27>, and the sensor is used to detect a change in the absorbent article. Changes in the above-mentioned absorbent articles due to excretion of the wearer.

<B1> The absorbent article according to any one of the above <1> to <41>, which has a lower part of the crotch arranged on the crotch of the wearer, and a lower part of the crotch arranged on the abdomen of the wearer than the lower part of the crotch The side part, and the back side part arranged on the back side of the wearer with respect to the lower part of the crotch, and At least in the lower part of the crotch, there is an outer layer body disposed on the side farther from the skin of the wearer than the absorber, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. the overlapping area, the sensor includes one that can detect the temperature of the portion of the absorbent article that overlaps with the sensor in a plan view, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the thermal conductivity of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface .

<B2> An absorbent article, which has a longitudinal direction extending from the wearer's abdomen to the back through the crotch portion, and a transverse direction perpendicular to the longitudinal direction, divided into a crotch portion disposed in the crotch portion, a crotch portion disposed in the crotch portion, and an absorbent article. The lower part is located on the ventral side of the wearer's abdominal side, and is arranged on the back side of the wearer's back side relative to the lower part of the crotch, and at least the lower part of the crotch is provided with an absorbent body for absorbing and retaining body fluids, and is arranged in the outer body on the side farther from the wearer's skin than the absorbent body, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. the overlapping area, the sensor includes one that can detect the temperature of the portion of the absorbent article that overlaps with the sensor in a plan view, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the thermal conductivity of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface .

<B3> The absorbent article as described in the said <B1> or <B2> whose thickness of the said 1st part is thinner than the said 2nd part. ＜B4＞ The absorbent article according to any one of the above <B1> to <B3>, wherein the first part contains a material selected from the group consisting of aluminum, tin, chromium, nickel, gold, silver, copper, germanium, titanium oxide, zinc oxide, One or more metal materials of the group consisting of silicon oxide and magnesium fluoride. <B5> The absorbent article according to any one of the above <B1> to <B4>, wherein the first part has liquid impermeability and air permeability is higher than that of the second part. ＜B6＞ The absorbent article as described in said <B5> whose said 1st part contains a melt-blown layer. ＜B7＞ The absorbent article according to any one of the above <B1> to <B6>, wherein the second part comprises 1 selected from the group consisting of hot air nonwovens, spunbond nonwovens, and spunbond-meltblown-spunbond nonwovens more than one species. ＜B8＞ The absorbent article according to any one of the above <B1> to <B7>, wherein the presence of the region corresponding to the sensor can be visually recognized. <B9> The absorbent article according to any one of the above <B1> to <B8>, comprising a hook and loop fastener provided on both side edges of the back part along the longitudinal direction, and provided on the abdominal part the non-skin-facing side that can fasten the fastening member of the hook and loop fastener, and The corresponding area of the sensor is offset to the center of the lateral direction of the lower part of the crotch. ＜B10＞ The absorbent article according to the above <B9>, wherein the sensor-corresponding area is offset from an area sandwiched between a pair of imaginary straight lines passing through the absorber with the largest length in the transverse direction. The two ends of the part in the transverse direction extend along the longitudinal direction. ＜B11＞ The absorbent article according to the above <B9> or <B10>, wherein in the sensor-corresponding region, the center of the longitudinal direction of the absorbent article is used as a boundary, and it is located at a position away from the boundary on the ventral side. When part of it is set as the corresponding area of the ventral sensor, and the part located on the back side of the boundary is set as the corresponding area of the back sensor, all the following conditions (1) to (3) are satisfied: (1) The area of the corresponding area of the above-mentioned ventral sensor> 0 (2) The area of the corresponding area of the above backside sensor ≧0 (3) The area of the corresponding area of the above-mentioned ventral sensor>the area of the corresponding area of the above-mentioned dorsal sensor.

＜B12＞ The absorbent article according to any one of the above <B1> to <B8>, wherein both side edges along the longitudinal direction of the abdominal part and the back part are joined to each other to form a waist opening. and shorts-type absorbent articles with leg openings, and The corresponding area of the sensor is offset at the center of the longitudinal direction of the lower part of the crotch. ＜B13＞ The absorbent article according to the above <B12>, wherein in the sensor-corresponding region, the center of the longitudinal direction of the absorbent article is used as a boundary, and a portion located on the ventral side of the boundary is defined as the abdomen For the area corresponding to the side sensor, when the portion located at the backside portion that is farther from the boundary is set as the area corresponding to the backside sensor, all of the following conditions (1) to (3) are satisfied: (1) The area of the corresponding area of the above-mentioned ventral sensor> 0 (2) The area of the corresponding area of the above backside sensor ≧0 (3) The area of the corresponding area of the above-mentioned ventral sensor>the area of the corresponding area of the above-mentioned dorsal sensor. ＜B14＞ The absorbent article according to the above <B12> or <B13>, wherein the sensor-corresponding region is offset from a region sandwiched between a pair of imaginary straight lines passing through the lateral direction in the absorber The two ends of the transverse direction of the part with the longest length extending along the longitudinal direction.

<C1> The absorbent article according to any one of the above <1> to <41>, which has a lower part of the crotch arranged on the crotch of the wearer, and a lower part of the crotch arranged on the abdomen of the wearer than the lower part of the crotch The side part, and the back side part arranged on the back side of the wearer with respect to the lower part of the crotch, and At least in the lower part of the crotch, there is an outer layer body disposed on the side farther from the skin of the wearer than the absorber, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. The overlapping area, the sensor includes one that can detect the humidity of the portion of the absorbent article that overlaps with the sensor in plan view, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the air permeability of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface , The first part is liquid impermeable or liquid impermeable.

<C2> An absorbent article, which has a longitudinal direction extending from the wearer's abdomen to the back through the crotch portion, and a transverse direction perpendicular to the longitudinal direction, divided into a crotch portion disposed in the crotch portion, a crotch portion disposed in the crotch portion, and an absorbent article. The lower part is located on the ventral side of the wearer's abdominal side, and is arranged on the back side of the wearer's back side relative to the lower part of the crotch, and at least the lower part of the crotch is provided with an absorbent body for absorbing and retaining body fluids, and is arranged in the outer body on the side farther from the wearer's skin than the absorbent body, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. The overlapping area, the sensor includes one that can detect the humidity of the portion of the absorbent article that overlaps with the sensor in plan view, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the air permeability of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface , The first part is liquid impermeable or liquid impermeable.

<C3> The absorbent article according to the above <C1> or <C2>, wherein the first part and the second part are composed of fiber sheets, and The fibers of the first part are present at a lower density than the second part. <C4> The absorbent article according to any one of the above <C1> to <C3>, wherein the thermal conductivity of the first part is higher than that of the second part. <C5> The absorbent article according to any one of the above <C1> to <C4>, wherein the sensor corresponding region is offset in the center of the lateral direction of the lower part of the crotch. <C6> The absorbent article according to the above <C5>, wherein the sensor-corresponding region is offset from a region sandwiched between a pair of imaginary straight lines passing through the absorber with the largest length in the transverse direction. The two ends of the part in the transverse direction extend along the longitudinal direction. <C7> The absorbent article according to the above <C6>, wherein in the sensor-corresponding region, the center of the longitudinal direction of the absorbent article is used as a boundary, and a portion located on the ventral side of the boundary is defined as the abdomen For the area corresponding to the side sensor, when the portion located at the backside portion that is farther from the boundary is set as the area corresponding to the backside sensor, all of the following conditions (1) to (3) are satisfied: (1) The area of the corresponding area of the above-mentioned ventral sensor> 0 (2) The area of the corresponding area of the above backside sensor ≧0 (3) The area of the corresponding area of the above-mentioned ventral sensor>the area of the corresponding area of the above-mentioned dorsal sensor. <C8> The absorbent article according to any one of the above <C1> to <C4>, wherein both side edges along the longitudinal direction of the abdominal part and the back part are joined to each other to form a waist opening. and shorts-type absorbent articles with leg openings, and The corresponding area of the sensor is offset at the center of the longitudinal direction of the lower part of the crotch. <C9> The absorbent article according to the above <C8>, wherein in the sensor-corresponding region, the center of the longitudinal direction of the absorbent article is used as a boundary, and a portion located on the ventral side of the boundary is defined as the abdomen For the area corresponding to the side sensor, when the portion located at the backside portion that is farther from the boundary is set as the area corresponding to the backside sensor, all of the following conditions (1) to (3) are satisfied: (1) The area of the corresponding area of the above-mentioned ventral sensor> 0 (2) The area of the corresponding area of the above backside sensor ≧0 (3) The area of the corresponding area of the above-mentioned ventral sensor>the area of the corresponding area of the above-mentioned dorsal sensor. <C10> The absorbent article according to the above <C9>, wherein the sensor-corresponding area is offset from an area sandwiched between a pair of imaginary straight lines passing through the absorber with the largest length in the transverse direction. The two ends of the part in the transverse direction extend along the longitudinal direction. <C11> The absorbent article as described in any one of said <C1>-<C10> whose 1st part contains a melt-blown layer. <C12> The absorbent article according to any one of the above <C1> to <C11>, wherein the second part comprises 1 selected from the group consisting of hot air nonwovens, spunbond nonwovens, and spunbond-meltblown-spunbond nonwovens more than one species. [Industrial Availability]

According to the disposable diaper (first embodiment) of the present invention, the external member can be easily attached to the outer surface of the disposable diaper, and when the external member is a sensor, the sensitivity of the sensor is good.

According to the disposable diaper (2nd - 6th embodiment) of this invention, a sensor can be reused easily, a sensor can be arrange|positioned at a suitable position easily, and a sensor can be prevented from falling off. According to the method for detecting changes in disposable diapers of the present invention, the sensor can be easily reused, the sensor can be easily arranged at a suitable position, the sensor can be prevented from being accidentally dropped or removed, and the sensor can be easily detected with Changes in absorbent articles due to excretion by the wearer.

According to the disposable diaper (7th - 8th embodiment) of this invention, the absorbent article which can reduce the risk of exudation of excrement and can realize high sensitivity of a sensor is provided.

2: inner body 3: Outer body 3a: 1st outer layer sheet 3b: 2nd outer sheet 4: Absorber 5: Absorbent body 6: Leak-proof flanging 7: Hook and loop 8: Sensor 11: Bottom sheet 12: 1st non-woven fabric 12a: End region 12d: The edge of the back side of the first nonwoven fabric 13: 2nd non-woven 13u: The edge of the ventral side of the second nonwoven fabric 14: Coincidence area 15: Sensor bag 15a: Insertion port 15b: Insert the area on the mouth side 15c: The area inside the insertion direction 16: Side seal 17: Outer body 18: Outside sheet 21: front sheet 23: Leak-proof sheet 26: Outer sheet 40: Absorbent core 41: Chip material 43: High liquid permeation part 43a: high liquid permeation part 43b: high liquid permeation part 44: Low liquid permeation part 45: Slim and high liquid permeation part 45a: slender high liquid permeable part 45b: slender high liquid permeable part 47: Space retention material 50: Item body 60: Flange forming sheet 61: Elastic member for flange forming 78: Cemented components 80:Urine sensor 81: Shell 82: Sensor exterior face 91: Leg elastics 92: Waist elastic member 100: Disposable Diapers 101: Disposable Diapers 101A: Disposable Diapers 101B: Disposable Diapers 101C: Disposable Diapers 101D: Disposable Diapers 102A: Disposable diapers 102B: Disposable diapers 300:mark A: ventral side B: back side C: lower crotch CLx: longitudinal centerline CLy: Transverse centerline E1～E3: Fixed area F: Predecessor FP: wing LH: Leg opening LS: Leg edge R: back piece S: side seal S1: outer surface of diaper SF: Flank WH: Waist opening X: Portrait Y: horizontal

Fig. 1 is a perspective view showing an unfolded disposable diaper as a first embodiment of the present invention. FIG. 2 is a development plan view schematically showing the skin-facing surface side (inner surface side) in a developed and extended state of the diaper shown in FIG. 1 . FIG. 3 is a cross-sectional view taken along line II-II of FIG. 2 . FIG. 4 is a development plan view schematically showing the non-skin-opposing surface side (outer surface side) in the unfolded and extended state of the diaper shown in FIG. 1 . Fig. 5(a) and (b) are equivalent views of Fig. 3 of a disposable diaper provided with another embodiment of the absorber of the present invention. Figures 6(a) to (g) are plan views showing changes in the marks of the present invention. FIG. 7( a ) is a plan view showing the urination sensor and the marker, and FIG. 7( b ) is a plan view showing a state where the urination sensor is attached to the position of the marker. Fig. 8 is a perspective view showing a disposable diaper according to a second embodiment of the present invention. Fig. 9 is a view showing the unfolded state of the disposable diaper shown in Fig. 8 as viewed from the side facing the skin. Fig. 10 is a view of the unfolded state of the disposable diaper shown in Fig. 8 viewed from the non-skin-opposite side. Fig. 11 is a plan view showing a backsheet, a first nonwoven fabric, and a second nonwoven fabric constituting the outer sheet of the disposable diaper shown in Fig. 8 . FIG. 12 is an enlarged view of the vicinity of the sensor bag of FIG. 10 . 13 is a cross-sectional view taken along line X-X of FIG. 12 , (a) is a cross-sectional view before the sensor is inserted, and (b) is a cross-sectional view after the sensor is inserted. Fig. 14 is an equivalent view of Fig. 10 showing a disposable diaper according to a third embodiment of the present invention. Fig. 15 is a perspective view showing a disposable diaper according to a fourth embodiment of the present invention. Fig. 16 is an equivalent view of Fig. 10 showing a disposable diaper according to a fourth embodiment of the present invention. Fig. 17 is an equivalent view of Fig. 12 showing a main part of a disposable diaper according to a fifth embodiment of the present invention. Fig. 18(a), (b) is an equivalent view of Fig. 13 showing the main part of the disposable diaper according to the fifth embodiment of the present invention. Fig. 19 is an equivalent view of Fig. 10 showing a disposable diaper according to a sixth embodiment of the present invention. Fig. 20 is a schematic perspective view of the unfolded disposable diaper according to the seventh embodiment of the present invention. Fig. 21 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. 20 . Fig. 22 is a cross-sectional view taken along the line I-I of Fig. 21 in the thickness direction, and is a schematic cross-sectional view of the lower portion of the crotch of the diaper shown in Fig. 20 . Fig. 23 is a schematic perspective view of the underpants-type disposable diaper according to the eighth embodiment of the present invention. Fig. 24 is a developed plan view schematically showing a portion of the skin-opposing surface side (inner layer body side) in the unfolded and extended state of the diaper shown in Fig. 23 . Fig. 25 is a cross-sectional view taken along the line II-II of Fig. 24 in the thickness direction, and is a schematic cross-sectional view of the lower portion of the crotch of the diaper shown in Fig. 20 . FIGS. 26( a ) to 26 ( f ) are schematic top views of the disposable diaper according to the seventh or eighth embodiment of the present invention in the unfolded and stretched state, respectively, and are views showing the arrangement pattern of the corresponding regions of the sensors . FIGS. 27( a ) to 27 ( g ) are schematic cross-sectional views in the transverse direction and the thickness direction of the lower portion of the crotch in the disposable diaper according to the seventh or eighth embodiment of the present invention, respectively. FIGS. 28( a ) to 28 ( g ) are schematic cross-sectional views in the transverse direction and the thickness direction of the lower part of the crotch in the disposable diaper according to the seventh or eighth embodiment of the present invention, respectively.

4: Absorber

7: Hook and loop

26: Outer sheet

40: Absorbent core

41: Chip material

43: High liquid permeation part

45: Slim and high liquid permeation part

45a: slender high liquid permeable part

45b: slender high liquid permeable part

78: Cemented components

80:Urine sensor

91: Leg elastics

100: Disposable Diapers

300:mark

A: ventral side

B: back side

C: lower crotch

CLx: longitudinal centerline

F: Predecessor

R: back piece

SF: Flank

X: Portrait

Y: horizontal

Claims (47)

A disposable diaper having a liquid-retaining absorbent body, having a longitudinal direction corresponding to the front-rear direction of the wearer, and a transverse direction perpendicular to the longitudinal direction, and Marked on the non-skin-opposite side of the above-mentioned disposable diaper, The said absorber has the high liquid permeation|transmission part which liquid permeability is higher than the part located in the said horizontal both sides of this part in the part which overlaps with the said mark. The disposable diaper of claim 1, wherein the above mark indicates the installation position of the urination sensor for detecting urination of the wearer. The disposable diaper according to claim 1, wherein the absorbent body has one pair of low-liquid-permeable portions with a liquid permeability lower than that of the high-liquid-permeable portion, and The high liquid permeation portion is located between the pair of low liquid permeation portions in the lateral direction. The disposable diaper according to claim 1, which has a crotch portion disposed on the wearer's crotch portion, and a ventral portion and a back portion extending forward and backward from the crotch portion, and The above-mentioned mark is located at the center of the above-mentioned transverse direction of the above-mentioned lower part of the crotch, When dividing the longitudinal center line of the above-mentioned disposable diaper into two halves of the above-mentioned longitudinal full length, when it is divided into a front body part arranged on the wearer's ventral side and a back body part arranged on the back side of the wearer when wearing, the above mark Located on the aforementioned predecessor piece. The disposable diaper of claim 1, wherein the absorbent body comprises an absorbent core, and The said highly liquid-permeable part has the space which does not exist the formation material of the said absorptive core in the whole area or a partial area of the thickness direction of the said absorptive core. The disposable diaper according to claim 5, wherein the high liquid permeation portion is a through hole in which the material for forming the absorbent core does not exist. The disposable diaper according to claim 5, wherein the high liquid permeability portion is a low basis weight portion in which the forming material of the absorbent core is present, and the thickness D1 of the space where the forming material does not exist is the thickness of the absorbent core. D is more than 5% and less than 80%. The disposable diaper according to claim 5, wherein the absorbent body has a low-liquid-permeable portion having a lower liquid-permeability than the high-liquid-permeable portion, and The high liquid permeation portion is a low basis weight portion in which the material forming the absorbent core is present, and the basis weight of the high liquid permeation portion is 5% or more and 80% or less of the basis weight of the low liquid permeation portion. The disposable diaper of claim 5, wherein a space holding material formed of a non-water-absorbent material is disposed in the space where the above-mentioned forming material does not exist. The disposable diaper of claim 9, wherein the space-retaining material is formed of a non-absorbent material, and The above-mentioned non-absorbent material is a fibrous mass or fluffy non-woven fabric containing hydrophobic fibers. The disposable diaper according to claim 1, wherein no water-absorbent polymer is present in the high liquid permeation portion. The disposable diaper of claim 1, wherein the absorbent body comprises an absorbent core, and an elongated high-liquid-permeable portion having the above-mentioned absorbent core-forming material having a lower basis weight than the portions on both sides in the aforementioned lateral direction, and a narrower width in the aforementioned lateral direction than the aforementioned high-liquid-permeable portion, The elongated high liquid permeation portion is continuous with the high liquid permeation portion in the longitudinal direction. The disposable diaper of claim 12, wherein the high liquid permeation portion is a low basis weight portion in which the material forming the absorbent core is present, and The basis weight of the above-mentioned forming material of the above-mentioned elongated high-liquid-permeable portion is lower than that of the above-mentioned high-liquid-permeable portion. The disposable diaper according to claim 12 or 13, wherein the elongated and highly liquid-permeable portion is a through groove in which the material for forming the absorbent core does not exist. The disposable diaper according to claim 12, which has a crotch portion disposed on the wearer's crotch portion, and a ventral portion and a back portion extending front and rear of the crotch portion, and The above-mentioned absorber has the above-mentioned elongated high-liquid-permeable part before and after the above-mentioned longitudinal direction of the above-mentioned high-liquid-permeable part, The length in the longitudinal direction of the elongated high liquid permeation portion located on the back side portion bounded by the high liquid permeation portion is longer than the elongated high liquid permeation portion located on the ventral side with the high liquid permeation portion as a boundary . The disposable diaper of claim 1, wherein the above-mentioned mark is marked in a manner that can be recognized on the outer surface of the above-mentioned disposable diaper before urination. The disposable diaper of claim 16, wherein the above-mentioned mark is a mark that the outer surface of the above-mentioned disposable diaper does not change in color before and after urination. The disposable diaper of claim 1, wherein the above-mentioned marks are in the shape of words, graphics, symbols, or a combination thereof. The disposable diaper of claim 1, wherein the above-mentioned marks include any one or more patterns of animals, vehicles, food, plants, animals, characters, musical notes, stars, rainbows, clouds and musical instruments. The disposable diaper of claim 19, wherein the above mark is a combination of a plurality of patterns. The disposable diaper of claim 1, wherein the above mark indicates the installation position of the urination sensor for detecting urination of the wearer, The above-mentioned urination sensor has a sensor outer surface portion on the opposite side of the side contacting the outer surface of the above-mentioned disposable diaper, When the urination sensor is attached to the position of the mark on the disposable diaper, the mark is integrated with the outer surface of the sensor, and is arranged to form a specific pattern. The disposable diaper according to claim 1, wherein the mark indicates the installation position of the urination sensor for detecting urination of the wearer, and the shape of the mark is similar to the top view of the urination sensor. The disposable diaper according to claim 1, comprising a surface sheet located on the skin-opposing surface side and an outer side sheet located on the non-skin-opposing surface side, and the surface sheet and the outer side sheet are provided with a The aforementioned absorber, The above-mentioned outer sheet, as the outermost constituent material of the disposable diaper, has a first non-woven fabric and a second non-woven fabric arranged in a state of being partially or entirely overlapped on the non-skin-facing side of the first non-woven fabric, In a part of the overlapping area where the first non-woven fabric and the second non-woven fabric overlap, the first non-woven fabric and the second non-woven fabric are not joined, and a sensor that can be arranged inside to detect the change that occurs on the disposable diaper is formed. bag, The above-mentioned overlapping area has a fixed area formed by joining the first non-woven fabric and the second non-woven fabric in three directions around the sensor bag, and in the remaining one direction, an insertion port for the above-mentioned sensor is formed, 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 bag is formed in the overlapping region. The disposable diaper of claim 23, wherein said sensor pocket has a size in which the whole of said sensor can be arranged inside. The disposable diaper according to claim 23 or 24, wherein at least one of the first non-woven fabric and the second non-woven fabric in the overlapping region has stretchability in an area larger than the size of the sensor. The disposable diaper as claimed in claim 23, wherein with respect to the fixed areas in the above three directions in the above-mentioned overlapping areas, at least the fixed areas located on both sides of the above-mentioned sensor pockets also extend beyond the ends of the overlapping areas. , and in the top view of the overlapping area, the area of the sensor bag is less than half of the area of the overlapping area. The disposable diaper of claim 23, wherein said insertion opening extends in a direction orthogonal to a direction in which said sensor is inserted into said sensor pocket through said insertion opening, and At least one of the first nonwoven fabric and the second nonwoven fabric in the overlapping region has stretchability in the extending direction of the insertion opening. The disposable diaper according to claim 23, wherein at least one of the first non-woven fabric and the second non-woven fabric in the overlapping region has a length equal to or longer than the length of the sensor at the portion on the side of the insertion opening of the sensor bag elastic member. The disposable diaper according to claim 23, which has a ventral portion disposed on the wearer's ventral side when worn, a back portion disposed on the wearer's backside, and the ventral portion and the dorsal portion. between the lower part of the crotch, and The insertion port of the said sensor of the said sensor bag is formed in the said ventral part side in the said overlapping area. The disposable diaper of claim 23, wherein the sensor pocket is formed at a portion overlapping with the absorber. The disposable diaper of claim 23, which is provided with an indicator for informing urination by a color change, the indicator extending in the longitudinal direction of the disposable diaper corresponding to the front-rear direction of the wearer, and the sensor pocket is formed at the overlap with the indicator. The disposable diaper of claim 23, wherein a sensor fixing material for fixing the sensor is arranged inside the sensor bag. The disposable diaper of claim 23, wherein the second nonwoven fabric in the overlapping area is provided with a mark indicating the position of the sensor pocket. A change detection method for a disposable diaper, wherein the sensor is arranged in the sensor bag of the disposable diaper according to any one of claims 23 to 33, and the sensor is used to detect excretion along with the wearer And the changes that occurred in the above-mentioned disposable diapers. The disposable diaper according to claim 1, which has a lower crotch portion disposed on the wearer's crotch portion, a ventral portion disposed on the wearer's abdomen side relative to the crotch portion, and a crotch portion disposed on the wearer's lower crotch portion the back side of the wearer's back side, and At least in the lower part of the crotch, there is an outer layer body disposed on the side farther from the skin of the wearer than the absorber, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. an overlapping area, the sensor includes one capable of detecting the temperature of the portion of the disposable diaper that overlaps the sensor in a plan view, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the thermal conductivity of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface . The disposable diaper of claim 35, wherein the thickness of the first part is thinner than the thickness of the second part. The disposable diaper of claim 35, wherein the first part comprises a member selected from the group consisting of aluminum, tin, chromium, nickel, gold, silver, copper, germanium, titanium oxide, zinc oxide, silicon oxide, and magnesium fluoride 1 or more metal materials. The disposable diaper according to claim 35, wherein the first part has liquid impermeability and air permeability is higher than that of the second part. The disposable diaper according to claim 1, which has a lower crotch portion disposed on the wearer's crotch portion, a ventral portion disposed on the wearer's abdomen side relative to the crotch portion, and a crotch portion disposed on the wearer's lower crotch portion the back side of the wearer's back side, and At least in the lower part of the crotch, there is an outer layer body disposed on the side farther from the skin of the wearer than the absorber, On a part of the non-skin facing surface of the outer body that forms the outer surface of the lower part of the crotch, a sensor-corresponding area is provided, and the sensor-corresponding area can be used to install a sensor, and includes the absorber and the absorber when viewed from above. the overlapping area, the sensor includes one capable of detecting the humidity of the portion of the disposable diaper that overlaps with the sensor when viewed from above, In the above-mentioned outer layer body of the above-mentioned lower part of the crotch, the air permeability of the first part where the sensor-corresponding area is arranged on the non-skin-facing surface is higher than that of the second part where the sensor-corresponding area is not arranged on the non-skin-facing surface , The first part is liquid impermeable or liquid impermeable. The disposable diaper of claim 39, wherein the first part and the second part are composed of fibrous sheets, and The fibers of the first part are present at a lower density than the second part. The disposable diaper of claim 39 or 40, wherein the thermal conductivity of the first part is higher than that of the second part. The disposable diaper of claim 38 or 39, wherein the first part above comprises a meltblown layer. The disposable diaper of claim 38 or 39, wherein the second part includes one or more kinds selected from the group consisting of air-through nonwovens, spunbond nonwovens, and spunbond-meltblown-spunbond nonwovens. The disposable diaper of claim 35 or 39, wherein the presence of the area corresponding to the above-mentioned sensor is visually identifiable. The disposable diaper of claim 35 or 39, wherein the corresponding area of the sensor is offset in the center of the lateral direction of the lower part of the crotch. The disposable diaper of claim 45, wherein said sensor-corresponding area is offset from an area sandwiched between a pair of imaginary straight lines, said pair of imaginary straight lines passing through said portion of said absorber having the largest length in said transverse direction The two ends of the transverse direction extend along the longitudinal direction. The disposable diaper according to claim 46, wherein in the region corresponding to the sensor, the center of the longitudinal direction of the disposable diaper is used as a boundary, and the part located on the ventral side relative to the boundary is set as the abdominal sensor When the part located on the backside part of the boundary is set as the corresponding area of the backside sensor, all the following conditions (1) to (3) are satisfied: (1) The area of the corresponding area of the above-mentioned ventral sensor> 0 (2) The area of the corresponding area of the above backside sensor ≧0 (3) The area of the corresponding area of the above-mentioned ventral sensor>the area of the corresponding area of the above-mentioned dorsal sensor.

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