JP6960272B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article having a built-in excretion detection sensor.

Whether or not the wearer of an absorbent article such as a disposable diaper is excreted is reported by the wearer or visually checked by an excretion indicator (the color or the like changes due to excretion, for example, see Patent Document 1) provided on the absorbent article. It is common to confirm by, but the confirmation work is complicated. In particular, confirmation of excretion in long-term care and the like imposes a heavy mental burden not only on the caregiver but also on the wearer.

To solve such problems, a tape-shaped sensor attached to the surface of an existing absorbent article and a wireless communication attached to the outer surface of the absorbent article while connected to the sensor to detect excretion. An excretion detection system for an absorbent article composed of parts is provided (see Non-Patent Document 1). This wireless communication unit is provided with a power supply, an antenna, a circuit, and the like, and when it detects excretion, it notifies a pre-registered smartphone. According to this prior art, the manager can know the presence or absence of excretion even at a place away from the wearer without taking off clothes or checking the inside of the absorbent article.

Japanese Unexamined Patent Publication No. 2004-337384

Sanwa Co., Ltd., "Brand introduction", [online], [Search on February 9, 2017], Internet <URL: http://sanwajp-group.com/brand.html>

However, since the above-mentioned prior art is retrofitted to the absorbent article, the administrator needs to properly install the sensor at the time of exchanging the absorbent article, and the preparatory work is complicated. However, it is not realistic to equip each product with a sensor and a wireless communication unit in advance from the viewpoint of manufacturing cost and selling price.

Further, since the wireless communication unit of the above-mentioned prior art is provided with a strong housing for accommodating parts such as a power supply, the housing may come into contact with the skin or the weight of the housing may deform the shape of the absorbent article. This may give the wearer a feeling of foreign matter or discomfort.

Therefore, a main object of the present invention is to provide an absorbent article having a built-in excretion detection sensor, at a low cost, and having little influence on the wearing feeling.

The absorbent articles that have solved the above problems are as follows.
<First aspect>
An absorbent article having a liquid-permeable top sheet, a liquid-impermeable sheet, and an absorber provided between them.
It has a passive type IC tag provided on the front side of the liquid impermeable sheet, and has.
When the IC tag receives a radio wave from the outside, it emits a radio wave including unique information, and at least one of the received radio wave and the transmitted radio wave can be shielded by the surrounding excretory liquid.
Absorbent article characterized by that.

(Action effect)
In this absorbent article, when the amount of excreted liquid around the IC tag increases, at least one of the radio waves received or transmitted is shielded, so that excretion is detected by utilizing the fact that communication with the IC tag becomes impossible. can do. Moreover, since the passive type IC tag does not have a built-in battery, is thin and inexpensive, it is suitable for built-in use of an absorbent article and has little influence on the wearing feeling.

<Second aspect>
It is provided with a code printing unit on which a one-dimensional or two-dimensional code corresponding to the unique information of the IC tag is printed.
The one-dimensional or two-dimensional code of the code printing unit can be optically read.
The absorbent article of the first aspect.

(Action effect)
When such a code printing unit is provided, by reading the one-dimensional or two-dimensional code with a reading device, the IC tag and the absorbent article or its wearer can be contacted based on the correspondence with the unique information of the IC tag. The association can be easily performed, and the absorbent article in which excretion is detected or the wearer thereof can be identified. Therefore, for example, it is possible to know who of a plurality of wearers excreted in a hospital or the like.

<Third aspect>
It has a display sheet having the code printing portion and one or more non-woven fabric layers covering the outside of the display sheet.
In the area of the display sheet that overlaps with the code printing portion, all layers outside the display sheet have a gap equal to or larger than the module dimension of the one-dimensional or two-dimensional code in the arrangement direction of the one-dimensional or two-dimensional code module. It is bonded via a transparent or translucent hot melt adhesive with a dense pattern that does not have
The region of the display sheet that overlaps with the code printing portion is a non-stretchable region that has no elasticity other than the non-woven fabric layer and the hot melt adhesive between the layers on the outside of the display sheet.
The one-dimensional or two-dimensional code of the code printing unit can be optically read through the non-woven fabric layer located on the outside of the display sheet and the hot melt adhesive between the layers.
The absorbent article of the second aspect.

(Action effect)
In this way, by incorporating the display sheet having the code printing portion behind the non-woven fabric layer, while maintaining the appearance like a cloth, the area of the display sheet that overlaps with the code printing portion is outside of (a) the display sheet. Adhesion pattern of hot melt adhesive that adheres all layers of 1D or 2D code in the arrangement direction of 1D or 2D code module dimensions (minimum module size if you have modules with different dimensions) The same shall apply hereinafter.) A dense pattern having no gaps of more than or equal to (b) No other than the non-woven fabric layer and the hot melt adhesive between the layers shall be provided on the outside of the display sheet, and (c) elastic. By using a non-stretchable region, the gaps (floats) between layers outside the display sheet and the wrinkles and waviness that differ between the display sheet and the non-woven fabric are reduced, effectively preventing a decrease in the reading rate of the code. Can be done.

<Fourth aspect>
The absorbent article of the third aspect, wherein the total thickness of the non-woven fabric layer covering the outside of the display sheet is equal to or less than the module dimension of the one-dimensional or two-dimensional code in the arrangement direction of the module of the one-dimensional or two-dimensional code.

(Action effect)
As described above, the total thickness of the non-woven fabric layer covering the outside of the display sheet is equal to or less than the module size of the one-dimensional or two-dimensional code in the arrangement direction of the modules of the one-dimensional or two-dimensional code. The decrease can be effectively prevented.

<Fifth aspect>
The third or fourth aspect, wherein the member is located inside the display sheet, and the region of the display sheet that overlaps with the code printing portion is not joined to the member adjacent to the inside of the display sheet. Absorbent article.

(Action effect)
In this way, at least the area of the display sheet that overlaps with the code printing portion is not joined to the member adjacent to the inside thereof, so that the deformation of the member inside the display sheet is less likely to affect the display sheet. It is possible to prevent a decrease in the code reading rate.

<Sixth aspect>
The exterior body that constitutes the front body and the exterior body that constitutes the back body are individually or integrally provided, and the interior body including the absorber is attached from the exterior body that constitutes the front body to the exterior body that constitutes the back body. Be,
Both side portions of the exterior body constituting the front body and both side portions of the exterior body constituting the rear body are joined to form a waist opening and a pair of left and right leg openings.
At least one of the exterior body constituting the front body and the exterior body constituting the rear body has a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and the width direction of the non-stretchable region. It has elastic areas provided on both sides,
The elastic region has a plurality of elongated shapes attached to an inner sheet layer, an outer sheet layer composed of a non-woven fabric layer, and between the inner sheet layer and the outer sheet layer at intervals in the front-rear direction along the width direction. It is a region that elastically expands and contracts in the width direction with the expansion and contraction of the elastic member.
The non-stretchable region is a region having an inner sheet layer and an outer sheet layer continuous from the stretchable region and an unnecessary elastic member remaining between the inner sheet layer and the outer sheet layer, and does not elastically expand and contract in the width direction.
Pants type disposable diapers
At least the code printing portion of the display sheet is provided inside the outer sheet layer in the non-stretchable region.
An absorbent article according to any one of the third to fifth aspects.

(Action effect)
As a display sheet to be incorporated in the outer body of such a pants-type disposable diaper, the display sheet having the code printing portion in the present invention is suitable.

<7th aspect>
It is provided with connecting tapes provided on both sides of the dorsal side and target tapes attached to the outer surface of the ventral side.
The connecting tape has a large number of hooks for attaching and detaching to and from the target tape.
The target tape has a film layer and an engaging layer provided on the outer surface of the film layer to which the hook engages.
Tape type disposable diaper,
The target tape has the cord printing portion at the end portion of the film layer, and the end portion having the cord printing portion is unbonded to the ventral outer surface or is detachably bonded.
The absorbent article of the second aspect.

(Action effect)
As a target tape in a tape-type disposable diaper, a tape having a film layer and an engaging layer provided on the outer surface of the film layer is widely used. Since the film layer of the target tape is smooth and suitable for printing, scales and patterns that serve as a guide for fastening the connecting tape are printed, and these scales and patterns are printed on the outside of the engaging layer. It was supposed to be visible from. The present inventor considered that the target tape is suitable for adding a cord because it is suitable for printing and has a large area. In that case, the engaging layer is partially or wholly applied on the cord. Since the code is read in the presence of the code, the reading rate may decrease. Therefore, the idea was changed, and the present invention was made in which the surface of the film layer opposite to the engaging layer was used as the reading surface. That is, since the target tape of the present invention can directly read the code without the influence of the engaging layer in a state where the end portion having the code printing portion is turned up, it is possible to prevent a decrease in the reading rate.

<8th aspect>
The absorbent article of the seventh aspect, in which the end portion having the code printing portion is not folded back in the product state.

(Action effect)
Since the end portion having the code printing portion is not folded back, the folded portion does not get in the way, and the code is hidden when the code is not read, so that the appearance is also excellent.

<Ninth aspect>
It is provided with connecting tapes provided on both sides of the dorsal side and target tapes attached to the outer surface of the ventral side.
The connecting tape has a large number of hooks for attaching and detaching to and from the target tape.
The target tape is made of a non-woven fabric made of a thermoplastic resin.
Tape type disposable diaper,
The target tape has a filming section, and the filming section has the code printing section.
The one-dimensional or two-dimensional code of the code printing unit can be optically read.
The absorbent article of the second aspect.

(Action effect)
As the target tape, a target tape made of a non-woven fabric made of a thermoplastic resin and having no film layer is also known. Such a target tape is not suitable for printing a one-dimensional or two-dimensional code because the fibers of the non-woven fabric are thick and sparse, and it is difficult to directly print finely. However, in the case of a non-woven fabric layer of a thermoplastic resin, it is possible to form a film by melting the fibers and crushing them flat in the thickness direction to improve printability. Is also a preferred form of printing.

<10th aspect>
An absorbent article according to a ninth aspect, wherein the film-forming portion has a light transmittance of 80% or more in the thickness direction, and the code printing portion is provided on the inner surface of the film-forming portion.

(Action effect)
When the light transmittance in the thickness direction of the filmed portion is set to 80% or more, the code can be reliably read from the outer surface side of the filmed portion even if the code printing portion is provided on the inner surface of the filmed portion.

<11th aspect>
An absorbent article according to any one of the first to tenth aspects, wherein the IC tag is provided in a plurality of places.

(Action effect)
According to this aspect, the absorption amount and the absorption site of the absorbent article can be known from the position of the IC tag in which excretion is detected.

According to the present invention, there are advantages such as being an absorbent article having a built-in excretion detection sensor, at a low cost, and having little influence on the wearing feeling.

It is a block diagram of the excretion detection system of a disposable diaper. It is a functional block diagram of the excretion detection system of a disposable diaper. It is explanatory drawing about the communicable range of the 1st radio wave and the 2nd radio wave. It is explanatory drawing about the communicable range of the 1st radio wave and the 2nd radio wave. It is explanatory drawing about the communicable range of the 1st radio wave and the 2nd radio wave. It is a flowchart which shows the flow of operation of an application. It is an image diagram of the application which shows the initial screen. It is an image diagram of the user interface which shows the state of a disposable diaper of a registrant. It is an image diagram of the user interface which shows the notification state by push notification. It is a flowchart which shows the operation flow of the excretion detection system of a disposable diaper. It is a block diagram of the excretion detection system of a disposable diaper. It is a block diagram of the excretion detection system of a disposable diaper. It is a top view which shows the inner surface of the pants type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the pants type disposable diaper in the unfolded state. FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. It is a cross-sectional view of 4-4 of FIG. (A) is a 5-5 cross-sectional view of FIG. 13, and (b) is a 6-6 cross-sectional view of FIG. It is a perspective view of a pants type disposable diaper. It is a developed state plan view which shows the outer surface of a pants type disposable diaper. (A) is a 5-5 cross-sectional view of FIG. 19 and (b) is a 6-6 cross-sectional view of FIG. It is a top view which shows the display sheet and a hot melt adhesive. It is a vertical cross-sectional view which shows the main part. It is a perspective view of the cutting device. It is an enlarged plan view of the display sheet part. It is sectional drawing which shows the main part. It is a top view which shows the main part of the inner surface of the pants type disposable diaper in the unfolded state. It is a top view which shows the inner surface of the tape type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the tape type disposable diaper in the unfolded state. 6-6 is a cross-sectional view taken along the line 6-6 of FIG. 27. FIG. 7 is a cross-sectional view taken along the line 7-7 of FIG. 27. 8-8 is a cross-sectional view taken along the line 8-8 of FIG. 27. 9-9 is a cross-sectional view taken along the line 9-9 of FIG. 27. 5-5 is a cross-sectional view taken along the line 5-5 of FIG. 27. It is sectional drawing which shows the main part of the target tape part.

Hereinafter, various forms of an absorbent article having an IC tag built-in as an excretion detection sensor will be described in detail with reference to an example of an excretion detection system for disposable diapers.

<First example of excretion detection system>
FIG. 1 shows a configuration diagram of an excretion detection system of the first example, and FIG. 2 shows a functional block diagram. This excretion detection system is intended to centrally manage the timing of changing disposable diapers of three disposable diaper wearers in the same hospital room, but the number of people to be managed is not limited to three. It may be 3 or more or 3 or less.

The excretion detection system of the example shown in FIGS. 1 and 2 includes disposable diapers 110a to 110c containing IC tags 120a to 120c, a reading device 140 communicating with the IC tags 120a to 120c, and an external device communicating with the reading device 140. It consists of a smartphone 150 as a device. The arrows shown in FIG. 1 schematically represent radio waves. Of these, the solid arrow indicates the first radio wave RW1 that is transmitted from the reading device 140, received by the IC tags 120a to 120c, and used as a power source for the IC tags 120a to 120c. The white arrows indicate the second radio wave RW2 which is transmitted from the IC tags 120a to 120c, received by the reading device 140, and includes the information of the unique numbers of the IC tags 120a to 120c. The broken line arrow indicates the third radio wave RW3 which is transmitted from the reading device 140, received by the smartphone 150, and includes the information of the unique number received by the reading device 140 among the unique numbers of the IC tags 120a to 120c.

(IC tag)
Each disposable diaper 110a to 110c has a built-in passive IC tag 120a to 120c that does not have a built-in battery. As shown in FIG. 2, the IC tags 120a to 120c have antenna units 121a to 121c for receiving the first radio wave RW1 transmitted from the antenna unit 141 of the reading device 140, and the antenna units 121a to 121c are the antenna units 121a to 121c. The received first radio wave RW1 is converted into electric power and supplied with electric power to the IC chips 122a to 122c. The IC chips 122a to 122c have an internal memory for storing unique information, and when the first radio wave RW1 is received, the IC chips 122a to 122c control the antenna portions 121a to 121c to include the unique information. Two radio waves RW2 are transmitted. The reading device 140 receives the second radio wave RW2, and the reading device 140 transmits the received unique number information as the third radio wave RW3.

The IC tags 120a to 120c are opaque so that most of the surroundings are covered with the excretory liquid after absorption of the excretory liquid such as urine, and communication of at least one of the first radio wave RW1 and the second radio wave RW2 becomes difficult. It is attached to the front side of the sex sheet 11 (described later). Since the liquid has a property that it is difficult for radio waves to pass through, when the reading device 14 cannot receive the second radio wave RW2 (shielded state), the first radio wave RW1 heading for the IC tags 120a to 120c is around the IC tag. The antenna units 121a to 121c cannot receive the first radio wave RW1 because they are shielded by the excrement liquid, or the antenna units 121a to 121c receive the first radio wave RW1, but the second radio wave is transmitted from the antenna units 121a to 121c. The radio wave RW2 is shielded by the excreted liquid. That is, it can be known that the excretion occurred due to the non-communication between the reading device 140 and the IC tags 120a to 120c. As described above, when excretion is detected by utilizing the property that the liquid does not easily pass radio waves, it is not necessary to separately provide a sensor for detecting the liquid such as a humidity sensor, and the manufacturing cost of disposable diapers can be suppressed. Further, since only the thin IC tags 120a to 120c are provided on the disposable diapers 110a to 110c, there is little possibility of giving a foreign body feeling or discomfort to the wearer of the disposable diapers 110a to 110c.

The unique information stored in the IC tags 120a to 120c is information such as different numbers, and is stored in the internal memories of the IC chips 122a to 122c, respectively. It is desirable that all the products of the disposable diapers 110a to 110c are provided with IC tags 120a to 120c having different unique information from each other, but the present invention is not limited to this, and at least the wearers of the disposable diapers managed simultaneously by the excretion detection system. It suffices to have disposable diapers with different unique information for each person. In other words, it is not necessary to attach different unique information to all manufactured products unless the same unique information is used at the same time due to lot management. For example, when the unique information is a unique number and a 12-bit internal memory is adopted, 4096 different unique numbers can be assigned, but even with such a limited number, the sales form (location, region, By different times), it is possible to avoid the situation where disposable diapers with the same unique number are used at the same time.

(Two-dimensional code)
Two-dimensional codes 111a to 111c corresponding to unique information such as unique numbers of the built-in IC tags 120a to 120c are printed on the disposable diapers 110a to 110c, respectively. The two-dimensional codes 111a to 111c can be read by the camera 151 of the smartphone 150 via the dedicated application 160. Two-dimensional code 111a~111c is not limited to the QR code (registered trademark), such as in the illustrated embodiment, may be another type of two-dimensional code, The primary source code instead of the two-dimensional code ( It can also be a bar code). Further, these two-dimensional codes and one-dimensional codes may be additionally printed with unique information such as corresponding unique numbers in order to enable manual input and the like.

(Reading device)
As shown in FIGS. 2 and 3 to 5, the reading device 140 has an antenna unit 141 that transmits the first radio wave RW1 and receives the second radio wave RW2 transmitted by the IC tags 120a to 120c, and a third. A communication unit 142 that transmits radio waves RW3 and a control unit 143 that controls them are provided, and the smartphone 150 can receive power supply to the IC tags 120a to 120c and unique information transmitted from the IC tags 120a to 120c. It plays the role of relaying.

The communicable range 170 between the reading device 140 and the IC tags 120a to 120c is such that the entire area inside the hospital room 180 can be covered, for example, as shown in FIG. 3, when the reading device 140 is installed substantially in the center of the hospital room 180, the radius It can be a spherical range of about 2 to 6 m. Further, the communicable range between the reading device 140 and the smartphone 150 can be set to a extent that can cover the entire area inside the hospital room 180, for example, within a spherical range having a radius of about 15 m. In this case, unless the third radio wave RW3 transmitted by the reader 140 is in a shielded state, when the administrator possesses the smartphone 150 and enters the hospital room 180, the smartphone 150 can receive the third radio wave RW3.

Of course, the communicable range between the reading device 140, the IC tags 120a to 120c, and the smartphone 150 is not limited to these examples, and the performances of the reading device 140, the IC tags 120a to 120c, and the smartphone 150, and disposable diapers. It can be appropriately determined depending on the environment in which the excretion detection system is used. Further, the installation location of the reading device 140 is not limited to the illustrated example, and can be appropriately determined.

For example, when the communicable range between the reader and the IC tag is narrow and within a spherical range with a radius of about 2 to 3 m, it can be dealt with by using one reader for one disposable diaper. .. Specifically, as shown in FIG. 4, the reading devices 140a to 140c are set in the corresponding disposable diapers 110a to 110c so that the IC tags 120a to 120c provided in the corresponding disposable diapers 110a to 110c are within the communicable range. Install around the bed used by disposable diaper wearers.

When the communicable range between the reader and the IC tag is further narrowed, as shown in FIG. 5, the antenna portions 141a to 141c of the readers 140a to 140c are formed in a sheet shape and under the mattress of the bed. By arranging them so that they are laid out, it is possible to cover the narrow communication range.

By appropriately changing the arrangement and configuration of the reading device as in these examples, it is possible to use an inexpensive IC tag having a narrow communicable range, so that the manufacturing cost and the selling price can be further suppressed.

Further, the information possessed by the third radio wave RW3, that is, the unique information received by the reading device 140 among the unique information of the IC tags 120a to 120c can be transmitted from the reading device 140 to the smartphone 150 via the Internet. According to this, the administrator who possesses the smartphone 150 can be notified no matter how far the reader 140 and the smartphone 150 are. Alternatively, information on the detection of excretion of disposable diapers 110a to 110c is periodically uploaded from, for example, the reading device 140 to the cloud storage on the Internet so that the information is updated, and the cloud storage is performed from the smartphone 150, a personal computer, or the like. By accessing the above, information regarding the detection of excretion of disposable diapers 110a to 110c may be read from anywhere.

(smartphone)
As shown in FIG. 2, the smartphone 150 controls the operation of the camera 151, the communication unit 152 capable of receiving the third radio wave RW3 from the communication unit 142 of the reader, the speaker 153, the touch panel type liquid crystal screen 154, and the operations of these components. It is provided with a control unit 155, and has a shooting function, a wireless communication function, a voice reproduction function, and a moving image reproduction function. When using the disposable diaper excretion detection system, the camera 151, the communication unit 152, the speaker 153, and the touch panel type liquid crystal screen 154 of the smartphone 150 are controlled by the control unit 155 that executes the application 160 described later.

The smartphone 150 mainly plays a role of associating the disposable diapers 110a to 110 with the wearer, and disposes of the disposable diapers 110a to 110 of unique information not included in the third radio wave RW3 or the wearer thereof. It plays a role of notifying the administrator as 110a to 110 or the wearer thereof. Instead of the smartphone 150, a tablet terminal having the same function or another information processing terminal may be used. Further, the excretion detection may be centrally managed by using a personal computer instead of the smartphone or tablet, or the excretion detection may be notified by the nurse call in conjunction with the nurse call. Further, among the unique information of the IC tags 120a to 120c described above, the unique information received by the reading device 140 may be transmitted by wire communication using an electric signal instead of or in combination with wireless communication by radio waves. Furthermore, wireless communication is not limited to Bluetooth® and Wi-Fi®.

(application)
The application 160 installed on the smartphone 150 is mainly for associating unique information with a disposable diaper wearer, detecting excretion, and notifying excretion. Hereinafter, the application 160 will be described with reference to the operation flowchart shown in FIG. 6 and the image diagrams of the user interface screens shown in FIGS. 7 to 9.

First, when the application 160 is started in step ST101, the application 160 displays the initial screen 161 as shown in FIG. 7 on the touch panel type liquid crystal screen 154 in step ST102.

The initial screen 161 is provided with a disposable diaper wearer registration button 1611, a registrant management button 1612, a setting change button 1613, and a detection start / end button 1614, and the disposable diaper wearer registration button 1611 is tapped. When the registrant management button 1612 is tapped, the mode shifts to the registrant management mode, and when the setting change button 1613 is tapped, the mode shifts to the setting change mode. Further, the detection start / end button 1614 alternately switches the start / end of excretion detection each time it is tapped.

In step ST103, the application 160 confirms the tapped button and executes the corresponding operation in steps ST103-1 to ST103-4. If the button is not tapped, the process proceeds to step ST103-5 (do nothing), and the input standby state is set.

The application 160 repeats until the steps of step ST102 and step ST103 are completed. In the following, the operations in steps ST103-1 to ST103-4 will be described in detail.

(Step ST103-1: Disposable diaper wearer registration mode)
In step ST103-1, application 160 executes a program in disposable diaper wearer registration mode. The disposable diaper wearer registration mode is a mode for associating the unique information of the IC tag with the disposable diaper wearer, and is started by tapping the disposable diaper wearer registration button 1611 on the initial screen 161.

In the disposable diaper wearer registration mode, the application 160 first reads the two-dimensional codes 111a to 111c, and then inputs the disposable diaper wearer name on which the read two-dimensional code is printed. To induce. The application 160 stores the unique number obtained by reading the two-dimensional code and the input name of the disposable diaper wearer as a set, and associates the unique number of the IC tag with the disposable diaper wearer. Therefore, the administrator can associate the unique number of the IC tag with the disposable diaper wearer with a simple operation.

The disposable diaper wearer registration mode is not limited to this form. For example, the method of acquiring unique information is not limited to reading a code such as a two-dimensional code. Character strings such as passwords and symbols can be printed on disposable diapers, and unique information can be acquired by reading and inputting these. It may be configured as follows. Further, the association between the unique information and the disposable diaper wearer is not limited to the association by the name of the disposable diaper wearer, and may be associated by the number of the hospital room or bed, the face photograph of the disposable diaper wearer, or the like.

(Step ST103-2: Registrant management mode)
In step ST103-2, application 160 executes the program in registrant management mode. The registrant management mode is a mode for confirming, correcting, or deleting the registered contents of a disposable diaper wearer (hereinafter referred to as a registrant) associated with a unique number in the disposable diaper wearer registration mode. It starts by tapping the registrant management button 1612 on the initial screen 161.

(Step ST103-3: Setting change mode)
In step ST103-3, the application 160 executes the program in the setting change mode. The setting change mode is a mode for setting the notification method to the administrator, the character size in the application, the screen brightness, and the volume of the notification sound, and the setting change button 1613 on the initial screen 161 is tapped. Start with. The setting contents are not limited to this form. For example, as described later, when a mode in which a plurality of IC tags are provided on one disposable diaper is adopted, the detection contents of the disposable diaper excretion detection system are set. It may be possible to perform in this mode.

(Step ST103-4: Switching between excretion detection start / end)
In step ST103-4, application 160 alternates between starting and ending the excretion detection of the disposable diaper. When the application 160 detects excretion, as shown in the user interface screen 162 shown in FIG. 8, one column of the registrant and the presence / absence of excretion are associated with each other and displayed on the touch panel type liquid crystal screen 154. For example, for the wearer of the disposable diaper in which excretion is detected, the display of the presence or absence of excretion is switched from "none" to "yes", and the notification sound is reproduced from the speaker 153 to notify the administrator. Further, for example, when excretion is detected in the standby state where the power of the touch panel type liquid crystal screen 154 of the smartphone 150 is turned off, the push notification 163 as shown in FIG. ) And the notification sound to notify the administrator.

In the above-mentioned example of the user interface screen of the application 160, the arrangement, shape, display method, size, color scheme, pattern, etc. of each button can be appropriately changed, and the notification method is not particularly limited.

(Overall operation flow)
The operation flow of the detection system will be described with reference to the operation flowchart shown in FIG. Here, the administrator emphasizes the flow of operation of the entire system after the disposable diapers 110a to 110c incorporating the IC tags 120a to 120c are attached to the wearer, and is applied to the application 160 of the smartphone 150. For details on the flow of operations to be executed, refer to the item of application 160.

First, in step ST201, the administrator activates the excretion detection system of the disposable diaper to transmit / receive the first radio wave RW1 to the third radio wave RW3. The transmission / reception of each radio wave is as described above (see FIG. 1). The activation of the disposable diaper excretion detection system here includes the setting of communication devices such as Bluetooth (registered trademark) and Wi-Fi, and the activation of the application 160 on the smartphone 150 to detect the excretion of disposable diapers. It means getting ready to start.

Next, in step ST202, the administrator reads the two-dimensional codes 111a to 111c of the disposable diapers 110a to 110c in the disposable diaper wearer registration mode of the application 160 of the smartphone 150, and sets the unique numbers of the IC tags 120a to 120c. , Correspondence and registration with the disposable diaper wearer, and tap the detection start / end button 1614 to start excretion detection.

Next, in step ST203, the application 160 of the smartphone 150 verifies whether all the unique information registered in step ST202 is included in the transmission information of the third radio wave RW3, and according to the result of the collation, step ST203. -1 to step ST203-3 is executed. Application 160 repeats the steps from step ST203 to step ST203-3 until excretion is detected.

Since the reading device 140 receives the second radio wave RW2 transmitted from the IC tags 120a to 120c and transmits the unique information included in all the received second radio waves RW2 in the third radio wave RW3, for example, a smartphone. The 150 receives the third radio wave RW3, collates the unique information contained in the third radio wave RW3 with the unique information registered on the smartphone 150 side, and if there is unique information not included in the third radio wave RW3. , The second radio wave RW2 cannot be received from the IC tag corresponding to the unique information, and it can be determined that the disposable diaper containing the IC tag has been excreted. In this example, depending on how the disposable diaper is used and how the reading device 140 is installed, the reading device 140 may not be able to receive the second radio wave RW2 even though the second radio wave RW2 is transmitted from the IC tags 120a to 120c. Therefore, it is determined that there is excretion when the IC tag cannot be received four times, for example, but the present invention is not limited to this.

If the two match as a result of the collation in step ST203, the application 160 proceeds to step ST203-1 and enters a standby state waiting for excretion detection without doing anything.

Further, the application 160 proceeds to step ST203-2 when there is unique information not included in the third radio wave RW3 as a result of the collation. When proceeding to step ST203-2, the application 160 increments the counter count assigned to the unique information not included in the third radio wave RW3. This counter is 0 in the initial state, and when it reaches 4, the process proceeds to step ST203-3. When the process proceeds to step ST203-3, the administrator is notified. That is, in order to prevent malfunction, it is not considered that there is excretion until the counter reaches 3.

Since the administrator can identify the disposable diaper wearer whose excretion is detected by the notification, the disposable diaper is changed in step ST204. After that, in step ST202 again, if the unique number of the new disposable diaper is associated with and registered with the disposable diaper wearer, the excretion can be detected.

<Second example of excretion detection system>
The excretion detection system of the second example includes tape-stop type disposable diapers 210a to 210c each provided with IC tags 120a to 120c, and reading devices 240a to 240c with a notification function.

Further, the readers 240a to 240c with a notification function emit light from antenna units 241a to 241c, speakers 242a to 242c, LEDs and the like that transmit one type of radio wave and receive radio waves transmitted by the IC tags 120a to 120c. Parts 243a to 243c are provided to notify the administrator at the time of reading the IC tag and detecting excretion. The communicable range between the readers 240a to 240c with a notification function and the IC tags 120a to 120c can be appropriately determined, and can be, for example, a spherical range having a radius of about 2 to 3 m.

The arrows shown in FIG. 11 schematically represent radio waves, and the solid arrows are transmitted from readers 240a to 240c with a notification function, received by the corresponding IC tags 120a to 120c, and ICs. The first radio wave RW1 used as a power source of tags 120a to 120c is shown. Further, the white arrows indicate the second radio wave RW2 transmitted from the IC tags 120a to 120c and received by the corresponding reading devices 240a to 240c with a notification function. This second example, unlike the first example described above, does not require the third radio wave RW3.

Further, in the excretion detection system of the second example, unlike the first example described above, the two-dimensional codes 111a to 111c corresponding to the unique information such as the unique numbers of the IC tags 120a to 120c built in the disposable diaper, etc. Is not printed.

In the excretion detection system of the second example, in the reading devices 240a to 240c with a notification function, only the IC tags 120a to 120c provided in the corresponding disposable diapers 210a to 210c can communicate within a communicable range (a spherical shape having a radius of about 2 to 3 m). It is installed around the bed used by disposable diaper wearers of disposable diapers 210a to 210c so as to enter (within the range). Then, when the second radio wave RW2 from the IC tags 120a to 120c cannot be received, the notification sound is emitted or the light is emitted from the speakers 242a to 242c in the reading devices 240a to 240c with a notification function corresponding to the IC tags 120a to 120c. The units 243a to 243c emit light, or a combination thereof allows the administrator to know that the disposable diapers corresponding to the reading devices 240a to 240c with the notification function have been excreted. In this way, only depending on whether or not the reading devices 240a to 240c with a notification function can receive the second radio wave RW2 transmitted by the corresponding IC tag (in other words, the IC tags 120a to 120c and the reading devices 240a to 240c with a notification function). When the presence or absence of excretion is detected (only by one-to-one correspondence with), the third radio wave RW3 and related system elements in the excretion detection system of the disposable diaper of the first example are not required, and each of the IC tags It can be used without performing the work of associating the unique information with the disposable diaper wearer or the disposable diaper.

In the illustrated example, a plurality of wearers are assumed, but it goes without saying that it can be applied to the management of one disposable diaper wearer as in the third example described later. Others are the same as the excretion detection system of the first example, and thus the description thereof will be omitted.

<Third example of excretion detection system>
The excretion detection system of the third example relates to the case where the excretion detection system of the first example is applied to the management of one disposable diaper wearer, for example, when it is used for home care. Therefore, the basic configuration of the excretion detection system of the third example is the same as that of the first example, and as shown in FIG. 12, disposable diapers 110a to 110t containing IC tags 120a to 120t (disposable diapers 110a in the figure). Is assumed to be worn), and includes a reading device 140 and a smartphone 150. For example, 20 disposable diapers 110a to 110t are sold as a set, and each includes two-dimensional codes 111a to 111t corresponding to the unique information of the IC tags 120a to 120t. In addition, the application 160 is installed on the smartphone 150, and registration of unique information of the disposable diaper 110a being worn, excretion detection, and excretion notification are performed.

The arrows shown in FIG. 16 schematically represent radio waves, and the solid arrows are the first radio waves transmitted from the reader 140, received by the IC tag 120a, and used as a power source for the IC tag 120a. It shows RW1. Further, the white arrow indicates the second radio wave RW2 which is transmitted from the IC tag 120a and received by the reading device 140 and includes the unique information of the IC tag 120a. Further, the broken line arrow indicates the third radio wave RW3 which is transmitted from the reading device 140 when the reading device 140 receives the second radio wave RW2 and is received by the smartphone 150 and includes the unique information of the IC tag 120a. ..

In addition, the excretion detection system of the first example stores the unique information and the input name of the disposable diaper wearer as a set in the application 160, but the excretion detection system of the third example is It is not always necessary to store the name of the disposable diaper wearer as it applies to the management of one disposable diaper wearer. The other aspects of the application 160, the method of associating the unique information with the disposable diaper wearer, the communicable range, the notification method, and the like are the same as those of the first example, and thus the description thereof will be omitted.

In the excretion detection system of the third example, the presence or absence of excretion is detected by whether or not the smartphone 35 can receive the third radio wave RW3 including the unique information associated with the disposable diaper 110a, as in the first example. Therefore, for example, when another disposable diaper 110b to 110t is placed on the side of the bed on which the disposable diaper wearer lies, the other disposable diaper 110b to 110t is within the communicable range of the reading device 140. Even so, unlike the second example, the excretion of the disposable diaper 31a during wearing can be appropriately detected.

<Other examples of excretion detection system>
The above-mentioned disposable diaper excretion detection system is suitable for the number of people to be centrally managed, the place and environment of use, etc., and the sensitivity, detection contents, arrangement and performance of each component, user interface. Etc. can be changed flexibly.

As one example, as will be described later, by applying the excretion detection system of the first example, a plurality of IC tags are provided at different positions in one disposable diaper, and in addition to detecting the presence or absence of excretion, the degree of absorption and the degree of absorption The absorption position can be detected. Specifically, the larger the amount of excretion, the wider the absorption range of the absorber, and the larger the number of IC tags in the radio wave shielding state. Utilizing this characteristic, the application 160 determines that the amount of absorption (excretion) is small when, for example, the number of shielded IC tags is 2 or less, and the number of shielded IC tags is 3 or less. At the time of, it is judged that the amount of absorption (excretion amount) is large, that is, the degree of absorption can be detected. Further, by providing a plurality of IC tags at intervals (or not at intervals) in the front-rear direction, if the IC tag on the dorsal side is in a shielded state, the back side absorbs it, and the IC tag on the ventral side is in a shielded state. If so, it can be determined that the ventral side is absorbing. That is, the absorption position in the disposable diaper can be detected. As described above, the excretion detection system of the first example can change the detection content of the disposable diaper excretion detection system by changing the arrangement and / or the number of IC tags.

Further, in the above-mentioned disposable diaper excretion detection system, the disposable diaper wearer who wears the disposable diaper and the administrator who exchanges the disposable diaper are described as different persons, but they may be the same person. For example, the above-mentioned excretion detection system may be used by a person with a lower body paralysis disorder to know whether or not his / her disposable diaper is excreted.

Next, the form of the absorbent article will be described in detail with reference to examples of pants-type disposable diapers and tape-type disposable diapers.

<Example of pants-type disposable diapers>
13 to 18 show an example of a pants-type disposable diaper that can be used as the disposable diapers 110a to 110c and 210a to 210c of the excretion detection system described above. The dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining each component located on the front side and the back side thereof, and is a solid, bead, curtain, summit or spiral coating of hot melt adhesive, or pattern coating. The fixed part of the elastic member is formed by (transfer of hot melt adhesive by the letterpress method) or by coating the elastic member on the outer peripheral surface of the elastic member such as comb gun or sure wrap coating instead of or together with this. be. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component member, a means by material welding such as a heat seal or an ultrasonic seal can also be used.

This pants type disposable diaper extends from the front exterior body 12F constituting the front body F, the rear exterior body 12B constituting the rear body B, and the rear exterior body 12B from the front exterior body 12F through the crotch part. The interior body 80 provided inside the exterior bodies 12F and 12B is provided, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form the side seal portion 12A. As a result, the openings formed by the front and rear ends of the exterior bodies 12F and 12B become waist openings WO through which the wearer's body passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 80 on both sides in the width direction of the interior body 80. The portion surrounded by the side edges is the leg opening LO through which the legs pass. The interior body 80 is a part that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are parts for supporting the interior body 80 with respect to the wearer's body. Further, the reference numeral Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the reference numeral X indicates the diaper in the unfolded state. Shows the full width of.

Further, the pants-type disposable diaper of this embodiment forms a waist circumference region T defined as a front-rear direction range (a front-rear direction range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a leg opening LO. It has an intermediate region L defined as a front-rear direction range of the portion (between the front-rear direction region having the side seal portion 12A of the front body F and the front-rear direction region having the side seal portion 12A of the back body B). The waist circumference region T can be divided into a "waist portion" W that conceptually forms an edge portion of the waist opening and a "waist lower portion" U that is a portion below the waist portion. Normally, when there is a boundary in the waist circumference region T where the stretching stress in the width direction changes (for example, the thickness and elongation rate of the elastic member change), the waist portion W is closer to the waist opening WO side than the boundary on the waist opening WO side. If there is no such boundary, the waist opening WO side of the absorber 56 or the interior body 80 is the waist portion W. The length of these anteroposterior LDs varies depending on the size of the product and can be appropriately determined. For example, the waist portion W can be 15 to 40 mm and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the wearer's leg, and this is a portion for inserting the wearer's leg. As a result, the unfolded pants-type disposable diaper has an hourglass shape as a whole.

(Interior body)
The interior body 80 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 15 to 17, the interior body 80 includes a top sheet 30 on the body side, a liquid impermeable sheet 11, and an absorbing element 50 interposed between them. Yes, it is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorption element 50. Shows three-dimensional gathers 60 standing on the body side provided on both sides of the interior body 80 in order to prevent excrement from leaking to both sides of the interior body 80.

The interior body 80 can be fixed to the exterior bodies 12F and 12B by means of joining by material welding such as heat sealing and ultrasonic sealing, or by a hot melt adhesive. In the illustrated embodiment, the back surface of the interior body 80, that is, in this case, the back surface of the liquid-impermeable sheet 11 and the mounting portion 65 of the three-dimensional gather 60 are fixed to the inner surfaces of the exterior bodies 12F and 12B by a hot melt adhesive. Has been done. The inner / outer fixing portions 81 for fixing the interior body 80 and the exterior bodies 12F and 12B can be provided in almost the entire region where the interior body 80 and the exterior bodies 12F and 12B overlap, and are usually provided in a portion of the interior body excluding both ends in the width direction. preferable.

(Top sheet)
The top sheet 30 has a property of allowing liquid to permeate, and examples thereof include a perforated or non-perforated non-woven fabric and a porous plastic sheet. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based fibers, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable, and if bulkiness and softness are required, the air through method, point bond method, and thermal bond method are preferable processing methods. ..

Further, the top sheet 30 may be one made of one sheet or one made of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

When the three-dimensional gathers 60 are provided, both side portions of the top sheet 30 pass between the liquid-impermeable sheet 11 and the three-dimensional gathers 60 and wrap around to the back side of the absorbing element 50 to prevent the liquid from penetrating. It is preferable to join the transparent sheet 11 and the three-dimensional gather 60.

It is desirable that the top sheet 30 is fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal or a hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. .. In the illustrated form, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 not only rapidly transfers the liquid to the absorber to improve the absorption performance by the absorber, but also prevents the phenomenon of "reversion" of the absorbed liquid from the absorber, and constantly dries the top sheet 30. Can be in the state of The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace, spunbond, SMS, pulp non-woven fabric, mixed sheet of pulp and rayon, point bond or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through non-woven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

The intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorber 56, or may be within a short length range centered on the region for receiving the liquid.

The intermediate sheet 40 is fixed to a member adjacent to at least one of the front and back sides by a joining means by material welding such as a heat seal or an ultrasonic seal, or a hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. Is desirable.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric in which a plastic film is provided on the surface of the non-woven fabric, or a plastic film. An example is a laminated sheet in which a non-woven fabric or the like is laminated and bonded to the surface. For the liquid impermeable sheet 11, it is preferable to use a material having impermeable and moisture permeable properties, which is preferably used from the viewpoint of preventing stuffiness. The moisture-permeable plastic film is a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in the uniaxial or biaxial direction. Is widely used. In addition to this, non-woven fabrics using microdenyl fibers, leakage-proof strengthening by reducing the voids of the fibers by applying heat or pressure, coating of highly water-absorbent resin or hydrophobic resin or water-repellent agent, etc. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11.

The liquid-impermeable sheet 11 has a width that fits on the back side of the absorbing element 50 as shown in the drawing, and also wraps around both sides of the absorbing element 50 in order to improve leakage resistance on the side surface of the top sheet 30 of the absorbing element 50. It can also be extended to both sides. The width of the extending portion is appropriately about 5 to 20 mm on each of the left and right sides.

Further, an excretion indicator whose color changes due to absorption of the liquid can be provided inside the liquid impermeable sheet 11, particularly on the side surface of the absorber 56.

(Three-dimensional gather)
The three-dimensional gather 60 is a band-shaped member extending in the entire front-rear direction along both side portions of the interior body 80, and is for blocking excrement that travels laterally along the top sheet 30 and prevents lateral leakage. It is provided in. The three-dimensional gather 60 of this example is provided so as to stand up from the side portion of the interior body 80, the portion on the base side stands up diagonally toward the center side in the width direction, and the portion on the tip side from the middle portion is outside in the width direction. It stands diagonally toward.

More specifically, in the three-dimensional gather 60, a strip-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 80 is folded back in the width direction WD and folded in two, and the folded portion and a sheet in the vicinity thereof are folded back. In between, a plurality of elongated gather elastic members 63 are fixed in an elongated state along the longitudinal direction at intervals in the width direction WD. The base end portion (the end portion opposite to the seat folded portion in the width direction WD) located on the opposite side of the tip portion of the three-dimensional gather 60 is a mounting portion 65 fixed to the back surface of the side edge portion of the interior body 80. The portion other than the mounting portion 65 is a protruding portion 66 (a portion on the folded-back portion side) protruding from the mounting portion 65. Further, the protruding portion 66 is composed of a root side portion facing the center side in the width direction and a tip side portion folded outward in the width direction from the tip of the root side portion. This form is a surface contact type three-dimensional gather, but a line contact type three-dimensional gather (not shown) that does not fold outward in the width direction can also be adopted. Of the protruding portions 66, both ends in the front-rear direction are fixed to the side surface of the top sheet 30 in an inverted state, while the front-rear fixing portions 67 located between them are not. It is a fixed free portion 68, and a gather elastic member 63 along the front-rear direction LD is fixed to the free portion 68 in an extended state.

In the free portion 68 of the three-dimensional gather 60, a hot melt adhesive, heat seal, and ultrasonic waves are used for bonding the inner layer and the outer layer of the gather sheet 62 and fixing the gather elastic member 63 sandwiched between them by various coating methods. At least one of the fixing means by welding the material such as a seal can be used. If the entire inner and outer layers of the gather sheet 62 are bonded together, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the gather elastic member 63 are not adhered or are weakly adhered. In the illustrated embodiment, the gather elastic member 63 is sandwiched between the inner layer and the outer layer of the gather sheet 62 by applying a hot melt adhesive only to the outer peripheral surface of the gather elastic member 63 by a coating means such as a comb gun or a sure wrap nozzle. The structure is such that the gather elastic member 63 is fixed to the inner layer and the outer layer of the gather sheet 62 and the inner layer and the outer layer of the gather sheet 62 are fixed only by the hot melt adhesive applied to the outer peripheral surface of the gather sheet 62. There is.

Further, for fixing the waterproof film 64 incorporated in the three-dimensional gather 60 and the gather sheet 62 and fixing the front and rear fixing portions 67 to the side surface of the interior body 80, hot melt adhesives and heat seals by various coating methods are used. At least one of the means by welding the material such as or ultrasonic seal can be used. In the illustrated form, slot coating of a hot melt adhesive is used to fix the waterproof film 64. Further, although the means of hot melt adhesive and material welding are combined for fixing the front and rear fixing portions 67 in the illustrated form, these fixing can also be performed by only one of the means.

As the gather sheet 62, a flexible, uniform and concealing non-woven fabric such as a spunbonded non-woven fabric (SS, SSS, etc.), an SMS non-woven fabric (SMS, SMSMS, etc.), a melt-blown non-woven fabric, etc., is water-repellent with silicone or the like, if necessary. The treated material can be preferably used, and the fiber texture is preferably about 10 to ^{30 g / m 2.} As the gather elastic member 63, thread rubber or the like can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixing is preferably 150 to 350%, more preferably 200 to 300%. Further, as shown in the drawing, the waterproof film 64 can be interposed between the gather sheets folded in two.

The number of gather elastic members 63 provided in the free portion of the three-dimensional gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is preferably 3 to 10 mm. With this configuration, the gathered elastic member 63 can easily hit the skin in the area where the gathered elastic member 63 is arranged. The gather elastic member 63 may be arranged not only on the tip side but also on the base side.

The object of fixing the mounting portion 65 of the three-dimensional gather 60 can be an appropriate member such as the top sheet 30, the liquid permeable sheet 11, and the absorbing element 50 in the interior body 80.

In the three-dimensional gather 60 thus configured, the contraction force of the gather elastic member 63 acts to bring both ends in the front-rear direction closer to each other, whereas both ends in the front-rear direction of the protruding portions 66 are fixed so as not to stand up. Since there is a non-fixed free part between them, only the free part stands so as to abut on the body side as shown in FIG. In particular, when the mounting portion 65 is located on the back surface side of the interior body 80, the three-dimensional gathers 60 stand up so as to open outward in the width direction in the crotch portion and its vicinity, so that the three-dimensional gathers 60 hit the legs around the surface. It comes into contact and the fit is improved.

The dimensions of the three-dimensional gather 60 can be appropriately determined, but in the case of baby diapers, for example, as shown in FIG. 15, the standing height of the three-dimensional gather 60 (the length in the width direction of the protruding portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, particularly 20 to 40 mm. Further, the separation distance W3 between the innermost folds when the three-dimensional gather 60 is folded flat so as to be parallel to the surface of the top sheet 30 is preferably 60 to 190 mm, particularly 70 to 140 mm.

In addition, unlike the illustrated form, the three-dimensional gathers 60 may be provided in double (two rows) on the left and right sides of the interior body 80.

(Absorption element)
The absorbing element 50 has an absorbing body 56 and a packaging sheet 58 that encloses the entire absorbing body 56. The packaging sheet 58 may be omitted. A plurality of absorbing elements 50 or absorptive bodies 56 can be laminated.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. The fiber aggregate is obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and by opening the tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately Can be done. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimping of the crimped fibers can be, for example, 5 to 75 fibers per 2.54 cm, preferably 10 to 50 fibers, and more preferably about 15 to 50 fibers. In addition, uniformly crimped crimped fibers can be used.

The absorber 56 may have a rectangular shape, but as shown in FIGS. 13 and 15, the absorber 56 is located at the front end portion, the rear end portion, and between them, and has a constricted portion that is narrower than the front end portion and the rear end portion. It is preferable that the shape of the hourglass has an hourglass shape, because the fit of the absorber 56 itself and the three-dimensional gather 60 around the legs is improved.

The size of the absorber 56 can be appropriately determined as long as it extends from the front, back, left and right of the urination port position, but it is preferable that the size of the absorber 56 extends to the peripheral edge of the interior body or its vicinity in the front-rear direction LD and the width direction WD. Reference numeral 56X indicates the width of the absorber 56.

(Highly absorbent polymer particles)
The absorber 56 may contain highly absorbent polymer particles in part or all of it. The highly absorbent polymer particles include "powder" in addition to "particles". As the highly absorbent polymer particles 54, those used for this kind of disposable diaper can be used as they are, for example, a sieve (shaking for 5 minutes) using a standard sieve (JIS Z8801-1: 2006) of 500 μm. It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and the proportion of particles remaining on the sieve is determined by sieving (shaking for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006). 60% by weight or more is desirable.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose. A substance or an acrylic acid (salt) polymer or the like can be used. As the shape of the highly absorbent polymer particles, a powder or granular material that is usually used is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption rate is too slow, so-called reversion, in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56, is likely to occur.

Further, as the highly absorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the highly absorbent polymer particles can be appropriately determined according to the amount of absorption required for the application of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the basis weight of the polymer ^{is less than 50 g / m 2} , it becomes difficult to secure the absorption amount. Above 350 g / m ² , the effect saturates.

If necessary, the highly absorbent polymer particles can change the content (density) of the absorber 56 in at least one of the thickness direction and the plane direction orthogonal to the thickness direction. For example, the content of the excretion site can be higher than that of other sites. When considering the difference between men and women, the content on the front side can be increased for men and the content on the center can be increased for women. Further, it is also possible to provide a portion where the highly absorbent polymer does not exist locally (for example, in a spot shape) in the plane direction of the absorber 56.

(Packaging sheet)
When the packaging sheet 58 is used, as the material thereof, tissue paper, particularly crepe paper, non-woven fabric, polylami non-woven fabric, sheet having small holes and the like can be used. However, it is desirable that the sheet does not allow the highly absorbent polymer particles to escape. When a non-woven fabric is used instead of the crepe paper, a hydrophilic SMS non-woven fabric (SMS, SMSMS, etc.) is particularly suitable, and polypropylene, polyethylene / polypropylene composite material, or the like can be used as the material. The basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoint of ease of manufacture and prevention of leakage of highly absorbent polymer particles from the front and rear edge edges, a cylinder is provided so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable that the parts are wound in a shape, the front and rear edges thereof are projected from the front and rear of the absorber 56, and the overlapping portion and the overlapping portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(IC tag)
An IC tag 120 is provided on the front side of the liquid impermeable sheet 11 for use in the excretion detection system described above. The IC tag 120 corresponds to the IC tags 120a to 120c of the excretion detection system described above, and the details thereof are as described above.

In all absorbent articles including disposable diapers, excretory liquid such as urine is supplied if it is on the front side of the liquid impermeable sheet 11, so the attachment position of the IC tag 120 is also the part where this excretory liquid is supplied. For example, when the time for blocking the received radio wave and the transmitted radio wave of the IC tag 120 may be short, or at least the antenna portion of the IC tag 120 or the outer peripheral surface of the whole, a liquid holding layer such as a hydrophilic non-woven fabric or diaper paper may be used. If the above is provided, the IC tag 120 can be attached to the surface of the top sheet 30. However, in order to ensure that the radio waves of the IC tag 120 are shielded more reliably and to prevent a feeling of strangeness when the IC tag 120 is attached, the mounting position of the IC tag 120 is a liquid-permeable top sheet as shown in FIG. It is preferably between 30 and the liquid impermeable sheet 11.

One of the particularly preferable mounting positions of the IC tag 120 is between the back surface of the absorbing element 50 and the liquid impermeable sheet 11 as shown in FIG. 25 (a).

One of the other preferred mounting positions for the IC tag 120 is inside the absorbing element 50, as shown in FIGS. 25 (b)-(e). In this case, as shown in FIG. 25B, when the IC tag 120 is built in the absorber 56, the hardness of the IC tag 120 is reduced by the buffering action of the absorber 56, and the presence of the IC tag 120 is also present. It is preferable because it is concealed. The absorber 56 is a fiber aggregate, and it is not impossible to mix the IC tag 120 inside the absorber 56. However, in consideration of ease of manufacture, as shown in FIG. 25 (c), a plurality of absorbers 56 are laminated. At the same time, it is also a preferable form to arrange the IC tag 120 between the layers. In particular, when the highly absorbent polymer is contained on both the front and back sides of the IC tag 120, the highly absorbent polymer absorbs the excreted liquid and expands without gaps, so that the radio wave shielding property of the IC tag 120 at the time of excretion is high. ..

Although the IC tag 120 is not built in the absorption element 50, as shown in FIG. 25 (d), when a plurality of absorption elements 50 are laminated and the IC tag 120 is arranged between the layers, the absorber 56 It has the same advantages as when the IC tag 120 is provided between the layers.

When the IC tag 120 is built in the absorbent element 50, it is provided between the front surface or the back surface of the absorber 56 and the inner surface of the packaging sheet 58 as shown in FIG. 25 (e) in consideration of ease of manufacture. You can also. In this case, the IC tag 120 can be fixed to the front surface or the back surface of the absorber 56 or the inner surface of the packaging sheet 58 with an adhesive or the like.

Of course, other than these mounting positions, for example, the IC tag 120 can be mounted between the top sheet 30 and the intermediate sheet 40, or between the intermediate sheet 40 and the absorbing element 50.

The IC tag 120 is preferably fixed to a member located on at least one of the front and back sides with an adhesive or the like, but may not be fixed.

As shown in FIG. 25 (e), when the absorber 56 has the slit 56S, the excreted liquid is rapidly supplied to the slit 56S, but the liquid retention in the slit 56S is low. Therefore, as shown in the illustrated example, when the absorber 56 has the slit 56S, the IC tag 120 is not at a position where it overlaps with the slit 56S, but is a portion where the entire IC tag 120 overlaps with the absorber 56 and is adjacent to the slit 56S. It is preferable to provide it at a position where it is used.

One IC tag 120 may be provided for one disposable diaper, or a plurality of IC tags 120 having different unique information may be provided for one disposable diaper. For example, as shown in FIG. 26, the five IC tags 120 are arranged at intervals (or not at intervals) in the front-rear direction LD, or in place of or together with the five IC tags 120 at intervals in the width direction (WD). Or it can be placed (without emptying). In this case, the above-mentioned excretion detection system can detect the degree of absorption and the absorption position in addition to detecting the presence or absence of excretion. Further, in this case, the arrangement of each IC tag 120 in the thickness direction may be the same or different.

(Exterior body)
The exterior bodies 12F and 12B of the examples shown in FIGS. 13 and 14 are composed of a front exterior body 12F which is a portion constituting the front body F and a rear exterior body 12B which is a portion constituting the rear body B, and is a front side. The exterior body 12F and the rear exterior body 12B are not continuous on the crotch side and are separated in the front-rear direction LD. The separation distance 12d can be about 150 to 250 mm. A part of the exposed portion on the back surface of the interior body 80 in this separated portion (for example, the entire portion exposed between the front exterior body 12F and the rear exterior body 12B in the front-rear direction, but does not extend to the front-rear end of the interior body 80. In addition, it is desirable to attach the crotch cover sheet 12M made of a non-woven fabric or the like so as to cover both sides of the interior body 80 so as not to reach both sides of the interior body 80 in the width direction, but it can be omitted. Further, as in the examples shown in FIGS. 19 and 20, the exterior body 12 may be integrated through the crotch from the front body F to the back body B.

The exterior bodies 12F and 12B have a waist circumference portion that is a range in the front-rear direction corresponding to the waist circumference region T. Further, in the present embodiment, the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has a buttock cover portion 14 extending from the waist circumference region T to the intermediate region L side. doing. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist circumference region T to the intermediate region L side, or the front exterior body 12F and the front exterior body 12F may be provided with an inguinal cover portion but no groin cover portion. It is not necessary to provide a portion corresponding to the intermediate region L on both of the rear exterior body 12B. Further, in the illustrated embodiment, the lower edge of the buttock cover portion 14 is formed in a straight line along the WD in the width direction like the lower edge of the front exterior body 12F, but is located on the waist opening side toward the outside in the width direction. It can also be a curve that makes it possible.

As shown in FIGS. 15 to 17, the exterior bodies 12F and 12B are formed by joining the outer sheet layer 12S and the inner sheet layer 12H by a joining means such as hot melt adhesive or welding. The sheet material forming the outer sheet layer 12S and the sheet material forming the inner sheet layer 12H are a common sheet material as shown in FIG. 17, and are individually formed as shown in FIG. 20. It can also be used as a sheet material. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12S are formed by the inner portion and the outer portion of one sheet material folded back at the edge of the waist opening WO (which may be the edge on the crotch side), respectively. Will be done. The former form has an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily displaced when they are bonded together, and the latter form has an advantage that the number of sheet materials is small.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H can be used without particular limitation, but a non-woven fabric is preferable. Nonwoven fabrics made of mixed fibers, composite fibers, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When a non-woven fabric is used, the basis weight is preferably about 10 to ^{50 g / m 2} , especially about 15 to 30 g / m ^2.

Further, the total basis weight of the exterior bodies 12F and 12B is preferably about ^{20 to 60 g / m 2.}

(Expandable area / non-expandable area)
The exterior bodies 12F and 12B are provided with elongated elastic members 15 to 19 such as thread rubber between the outer sheet layer 12S and the inner sheet layer 12H in order to improve the fit to the waist circumference of the wearer. An elastic region is formed that elastically expands and contracts in the width direction WD with the expansion and contraction of the elastic member. In this stretchable region, the outer sheet layer 12S and the inner sheet layer 12H contract with the contraction of the elastic member in the state of natural length to form wrinkles or folds, and when the elastic member extends in the longitudinal direction, the outer sheet is formed. The layer 12S and the inner sheet layer 12H can be stretched to a predetermined stretch rate at which the inner sheet layer 12H is stretched without wrinkles. As the elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the outer sheet layer 12S and the inner sheet layer 12H on the exterior bodies 12F and 12B and fixing the elastic members 15 to 19 sandwiched between them, a hot melt adhesive, a heat seal, or an ultrasonic seal is used by various coating methods. At least one of the fixing means by welding the material such as the above can be used. If the entire surfaces of the exterior bodies 12F and 12B are firmly fixed, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the elastic members 15 to 19 are not adhered or are weakly adhered. In the illustrated embodiment, the elastic members 15 to 19 are formed by applying a hot melt adhesive only to the outer peripheral surfaces of the elastic members 15 to 19 by a coating means such as a comb gun or a sure wrap nozzle and sandwiching the elastic members 15 to 19 between the sheet layers 12S and 12H. The structure is such that the elastic members 15 to 19 are fixed to both sheet layers 12S and 12H and the elastic members 15 to 19 are fixed between both sheet layers 12S and 12H only by the hot melt adhesive applied to the outer peripheral surface of the sheet. The elastic members 15 to 19 can be fixed to the outer sheet layer 12S and the inner sheet layer 12H only at both ends in the expansion / contraction direction in the expansion / contraction region.

More specifically, between the outer sheet layer 12S and the inner sheet layer 12H in the waist portion W of the exterior bodies 12F and 12B, a plurality of waist portion elastic members 17 are spaced in the vertical direction so as to be continuous over the entire width direction. It is installed open. Further, among the waist elastic members 17, one or a plurality of the waist elastic members 17 arranged in the region adjacent to the lower waist U may overlap with the interior body 80, or may overlap with the interior body 80 in the width direction center. Except for the portion, it may be provided on both sides in the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ^{2 in} the case of natural rubber, particularly 0.1 to 1. It ^{is preferable to provide about 3 to 22 thread rubbers (about 0 mm 2} ) at intervals of 4 to 12 mm, and the elongation rate of the WD in the width direction of the waist portion W is about 150 to 400%, particularly about 220 to 320%. It is preferable to have it. Further, the waist portion W does not need to use the waist portion elastic member 17 having the same thickness for all of the LDs in the front-rear direction or have the same elongation rate. The pod elongation may be different.

Further, between the outer sheet layer 12S and the inner sheet layer 12H in the waist lower portion U of the exterior bodies 12F and 12B, a plurality of waist lower elastic members 15 and 19 made of elongated elastic members are spaced apart in the vertical direction. It is installed open.

The elastic members 15 and 19 at the lower waist have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 0. It is preferable to provide about 5 to 30 elastic strips (about 1.0 mm ² ) at intervals of 1 to 15 mm, particularly 3 to 8 mm, and the elongation rate of the WD in the width direction of the lower waist portion U by this is 200 to 350%. In particular, it is preferably about 240 to 300%.

Further, between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover portion 14 of the rear exterior body 12B, a plurality of cover portion elastic members 16 made of elongated elastic members are attached at intervals in the vertical direction. Has been done.

The cover elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 ^{mm 2 in} the case of natural rubber, particularly 0.1 to 1.0 mm. ^It is preferable to provide about 2 to 10 rubber threads of about 2) at intervals of 5 to 40 mm, particularly 5 to 20 mm, and the elongation rate of the WD in the width direction of the cover portion by this is 150 to 300%, particularly 180 to 260. It is preferably%.

When the inguinal cover portion is provided on the front exterior body 12F, the cover portion elastic member can be provided in the same manner.

When the elastic members 15, 16 and 19 are provided in the front-rear direction range having the absorber 56 as in the lower waist portion U and the buttock cover portion 14 in the illustrated form, the width direction of the absorber 56 in a part or all of the elastic members 15, 16 and 19. In order to prevent the contraction of the WD, the non-stretchable region A1 is defined as the middle width direction (preferably including the entire inner / outer fixing portion 81) including a part or all of the portion overlapping the absorber 56 and the WD in the width direction. Both sides in the width direction are defined as the expansion / contraction region A2. The waist portion W is preferably a stretchable region A2 over the entire width direction, but a non-stretchable region may be provided in the middle in the width direction as in the lower waist portion U.

(Code printing department)
When this pants-type disposable diaper is used as the disposable diapers 110a to 110c and 210a to 210c used in the first and third examples of the excretion detection system described above, one-dimensional or two-dimensional including the unique information of the IC tag 120 is included. A code printing unit 26 on which the code is printed is provided. The one-dimensional or two-dimensional code of the code printing unit 26 is optically readable.

The code printing unit 26 can be provided on at least one of the front exterior body 12F and the rear exterior body 12B. Further, the print target and the print position of the code printing unit 26 can be appropriately determined. Therefore, the code printing unit 26 can be printed directly on the outer surfaces of the exterior bodies 12, 21F, and 12B. However, in most absorbent articles, not to mention disposable diapers, the outer surface is made of non-woven fabric to achieve a cloth-like appearance and feel, and the most readable part is not smooth and code printing. It cannot be said that it is suitable for printing the part 26. Further, although the code printing unit 26 can be provided on the post-processing tape attached to the outer surface of the absorbent article, the area of the post-processing tape is limited, and the code size may be increased in order to improve the reading probability. , It is not suitable for providing information in a large area in combination with pictures and characters.

On the other hand, in the case of absorbent articles, there is a method of arranging a smooth display sheet on which a display such as a picture or a character is printed inside one or more non-woven fabric layers including a non-woven fabric constituting the outer surface so that the article can be visually recognized from the outer surface. Since it is known, the code printing unit 26 can also be printed on the display sheet 25 as shown in FIGS. 14 and 17, and 19 and 20.

The base material of the display sheet 25 is not particularly limited as long as it is suitable for printing, and for example, paper such as crepe paper, resin film, or the like can be used. When a highly opaque base material such as crepe paper is used, it is necessary to provide the code printing unit 26 on the outer surface of the display sheet 25 as shown in the figure. For example, the light transmittance (described later) is 90%. When a highly transparent base material such as the above film is used, the code printing portion 26 can be provided on the inner surface of the display sheet 25. When crepe paper is used, its thickness is preferably 100 to 150 μm, and its density is preferably 100 to 200 kg / m ³ . A crepe paper having such a thickness and density ^{can be produced by setting a basis weight of 10 g / m 2} or more and a crepe ratio of about 10%. The density can be calculated from the basis weight and the thickness. The crepe rate is a value calculated by ((Yankee dryer peripheral speed) − (winding reel peripheral speed)) / (Yankee dryer peripheral speed) × 100 (%).

The two-dimensional code is a matrix type in which square or circular modules (unit cells) are arranged in a two-dimensional direction, for example, a QR code (registered trademark) or the like, and a primary code consisting of a one-dimensional array of modules consisting of bars and spaces. There is a stack type in which a plurality of original codes are arranged, but any of them may be used, and the type of code is not particularly limited. A one-dimensional code can be used in place of or in combination with the two-dimensional code. The dimensions in the module arrangement direction of the one-dimensional or two-dimensional code (one direction in the case of the one-dimensional code, orthogonal two directions in the case of the two-dimensional code) can be appropriately determined, but are 0.2 mm or more, particularly 0.20 to 0.20. It is preferably 0.25 mm. As long as these one-dimensional or two-dimensional codes include the unique information of the IC tag built in the diaper, the product information (specifications, price, expiration date, instruction manual, production lot number, etc.) and the product or its product or It may include other information such as advertising information related to other products (advertising message itself, URL of advertising website, etc.), or URL information for music playback, video playback, game execution, and the like.

If the display sheet 25 is provided adjacent to the inner surface of the outermost sheet layer, it is closer to the outer surface of the product and is easy to read optically. Therefore, as shown in FIG. 22A, the inner surface of the outer sheet layer 12S Although it is desirable that the product is provided adjacent to the inner sheet layer 12H, it may be provided adjacent to the outer surface of the inner sheet layer 12H as shown in FIG. 22 (b), and as shown in FIG. 22 (c). It may be provided adjacent to the inner surface of the inner sheet layer 12H.

When the code printing unit 26 is provided on the display sheet 25, the code is read through one or a plurality of non-woven fabric layers located on the outside of the display sheet 25. Therefore, gaps (floats) between layers outside the display sheet 25 and each layer are present. The reading rate may decrease due to minute wrinkles and swells that differ from each other. Therefore, as in the examples shown in FIGS. 21 and 22, in the area overlapping the code printing unit 26 of the display sheet 25, all layers outside the display sheet 25 are two-dimensional in the arrangement direction of the two-dimensional code modules. It is preferably bonded via a transparent or translucent hot melt adhesive H1 with a dense pattern that does not have a gap larger than the module size of the cord. Here, with all layers outside the display sheet 25, as shown in FIG. 22 (a), the display sheet 25 is provided adjacent to the inner surface of the outer sheet layer 12S, or FIG. 22 (b). When it is provided adjacent to the outer surface of the inner sheet layer 12H as shown in FIG. 22, it is between the outer sheet layer 12S and the display sheet 25 layer, and as shown in FIG. 22C, the inner sheet layer 12H When it is provided adjacent to the inner surface of the above, it is between the display sheet 25 layer and the inner sheet layer 12H, and between the inner sheet layer 12H and the outer sheet layer 12S.

Further, as the dense pattern of the hot melt adhesive H1, in addition to a continuous pattern without gaps (spray coat, curtain coat, slot coat as a coating method), a spiral pattern with narrow gaps can be adopted. As shown in FIG. 21 (a), as long as all the layers outside the display sheet 25 are bonded via the hot melt adhesive H1 having the dense pattern, at least in the area overlapping the code printing portion 26 of the display sheet 25. In addition, only a part of the area including the area overlapping the code printing unit 26 and the peripheral part in the vicinity thereof is adhered via the hot melt adhesive H1 having the above-mentioned dense pattern, and the other areas are sparse such as a spiral pattern having a large interval. In addition to adhering through the hot melt adhesive H2 having a similar pattern, as shown in FIG. 21B, the entire area overlapping the display sheet 25 is adhered via the hot melt adhesive H1 having the dense coating pattern. You can also.

As the hot melt adhesives H1 and H2, as long as they are transparent or translucent, for example, EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like can be used without particular limitation. As the transparency of the hot melt adhesives H1 and H2, those having a haze (transparency) of 40% or less are preferable, and those having a haze (transparency) of 20% or less are particularly preferable. The haze values of the hot melt adhesives H1 and H2 can be measured by the method described in paragraph [0021] of JP-A-2006-335786.

Further, the region of the display sheet 25 that overlaps with the code printing portion 26 has only the non-woven fabric layer and the hot melt adhesive H1 between the layers on the outside of the display sheet 25, and is between one or more non-woven fabric layers and layers from the outside of the diaper. The two-dimensional code of the code printing unit 26 can be optically read via the hot melt adhesive H1. As shown in the illustrated example, it is desirable that the entire display sheet 25 is located in the non-stretchable region A1, but only a part of the region including the region that overlaps with the code printing unit 26 is located in the non-stretchable region A1. The other region may be located in the expansion / contraction region A2.

By incorporating the display sheet 25 having the code printing unit 26 behind the non-woven fabric layer in this way, the area of the display sheet 25 that overlaps with the code printing unit 26 while maintaining the appearance like a cloth (a). The adhesive pattern of the hot melt adhesive H1 that adheres all the layers outside the display sheet 25 is the module dimensions of the one-dimensional or two-dimensional code (when the module dimensions are different) in the arrangement direction of the modules of the one-dimensional or two-dimensional code. Is the minimum module dimension. The same shall apply hereinafter.) It is assumed that the pattern does not have a gap equal to or larger than that of (b) the non-woven fabric layer and the hot melt adhesive H1 between the layers are provided on the outside of the display sheet 25 (c). ) By setting the non-stretchable region A1 having no elasticity, the gaps (floats) between the layers outside the display sheet 25 and the wrinkles and waviness different between the display sheet 25 and the non-woven fabric are reduced, and the reading rate of the code is reduced. The decrease can be effectively prevented.

As shown in FIGS. 22 (a) and 22 (b), the area of the display sheet 25 that overlaps with the code printing portion 26 is not joined to a member (inner sheet layer 12H in the illustrated embodiment) adjacent to the inside of the display sheet 25. Is preferable. As a result, deformation of the members inside the display sheet 25 is less likely to affect the display sheet 25, so that it is possible to prevent a decrease in the reading rate of the code. In this case, as shown in the illustrated figure, it is desirable that the entire display sheet 25 is not joined to the member adjacent to the inside, but at least a part of the area including the area overlapping the code printing portion 26 is the member adjacent to the inside. The other region may be joined to a member adjacent to the inside.

Further, as shown in FIGS. 22 (d) and 22 (e), an inwardly folded folded portion 25f is provided at any one or more of the front, rear, left, and right ends of the display sheet 25, and the folded portion 25f is provided outside the folded portion 25f. It is also a preferable form to provide the code printing unit 26 in the portion overlapping the above. As a result, the rigidity of the portion of the display sheet 25 having the code printing portion 26 is increased and the deformation is less likely to occur, so that it is possible to prevent a decrease in the reading rate of the code. In this case, if the folded-back portion 25f and the portion overlapping the outside thereof are joined by the hot melt adhesive H3 or the like as shown in FIG. 22 (e), the rigidity is further improved. When the display sheet 25 is not joined as shown in (d), there is an advantage that the deformation of the folded portion 25f of the display sheet 25 is less likely to affect the code printing unit 26, and the code reading rate can be prevented from being lowered.

Further, in order to completely eliminate the influence of the contraction force of the unnecessary elastic member 18 on the display sheet 25, it is desirable that the unnecessary elastic member 18 is not fixed to the members in contact with the front and back surfaces thereof. That is, as shown in FIG. 22A, the outer surface of the display sheet 25 and the inner surface of the inner sheet layer 12H can be fixed to the facing surfaces by fixing means such as hot melt adhesives H1 and H2. The unnecessary elastic member 18 is prevented from being fixed to the inner surface of the display sheet 25 and the outer surface of the inner sheet layer 12H by a fixing means such as a hot melt adhesive. As a result, the unnecessary elastic member 18 contracts independently, the members adjacent to the front and back surfaces thereof do not contract, and the display sheet 25 is less likely to be deformed. In such a structure, at the time of manufacturing, the portion of the elastic members 15, 16 and 19 located in the non-stretchable region A1 is not fixed to the adjacent members on the front and back sides by not applying the hot melt adhesive or the like. Can be built. Further, the members adjacent to the front and back of the unnecessary elastic member 18 may not be fixed to each other.

Since the two-dimensional code of the code printing unit 26 is optically read by a dedicated code reader or a camera built in a mobile terminal such as a smartphone, the part outside the display sheet 25 is transparent to visible light. It is preferable to be excellent. Specifically, the light transmittance in the thickness direction of the entire non-woven fabric layer covering the outside of the display sheet 25 (in the figure, only the outer sheet layer 12S is used, but when there are a plurality of outer non-woven fabric layers, a plurality of layers are stacked). It is preferably 80% or more. The light transmittance is measured as follows using, for example, an illumination metering type color difference meter Z-300A manufactured by Nippon Denshoku Industries Co., Ltd. That is, first, measurement is performed in a state where a shield that blocks light is arranged between one detection unit and the other detection unit, and zero point correction is performed. Next, after removing the shield arranged between one detection unit and the other detection unit, measurement is performed in a state where there is nothing blocking the light, and standard correction is performed. Next, the outer surface sheet, which is an object, is measured in a state of being arranged between one detection unit and the other detection unit.

Further, it is preferable that all the non-woven fabric layers covering the outside of the display sheet 25 have a texture index of 510 or less because it is possible to prevent a decrease in the reading rate due to diffused reflection. It is more preferable that the product of the texture index of the non-woven fabric layer and the basis weight of the non-woven fabric layer is 7600 or less. The formation index is measured using a formation tester FMT-1000A manufactured by Nomura Shoji Co., Ltd. The measurement area is 100 mm × 100 mm, the measurement time is 20 seconds / sample, and the formation index is measured on both the front and back surfaces of the five samples, and the average value is used as the measured value. The formation index is expressed by (standard deviation of absorbance / average absorbance) × 10, and the smaller the value, the less the formation unevenness.

Further, it is preferable that the thickness of all the non-woven fabric layers outside the display sheet 25 is equal to or less than the module dimension of the two-dimensional code in the arrangement direction of the modules of the two-dimensional code because the decrease in the reading rate of the code can be effectively prevented. ..

From the above viewpoint, the non-woven fabric located outside the display sheet 25 is preferably a single non-woven fabric (outer sheet layer 12S) as shown in the figure, and the non-woven fabric in that case has a basis weight of 8 to 20 g / m ² . The thickness is preferably 0.1 to 0.3 mm and the fineness is preferably 1.5 to 2.0 dtex.

(Formation of non-stretchable region)
In the stretchable region A2 and the non-stretchable region A1, elastic members 15 to 17, 19 are supplied between the inner sheet layer 12H and the outer sheet layer 12S in which the display sheet 25 is fixed on the inner surface by the hot melt adhesives H1 and H2. However, the elastic members 15, 16 and 19 are fixed at least at both ends in the expansion / contraction direction in the expansion / contraction region A2 via a hot melt adhesive, and are not fixed in the region that becomes the non-expansion / contraction region A1, but the region that becomes the non-expansion / contraction region A1. In, the elastic members 15, 16 and 19 are cut by pressurization and heating at one place in the middle in the width direction, or almost the entire elastic members 15, 16 and 19 are finely cut by pressurization and heating to form an expansion and contraction region. It can be constructed by killing the elasticity in the non-stretchable region A1 while leaving the elasticity in A2.

FIG. 23A shows a case where the elastic members 15, 16 and 19 are cut at one place in the middle in the width direction, and the outer circumference of the pressure portion 71 having the cutting convex part 72 at one place in the circumferential direction. The display sheet 25 is provided between the inner sheet layer 12H and the outer sheet layer 12S by the seal roll 70 in which the cut convex portion 72 is heated to a desired temperature in preparation for the surface and the surface-smooth anvil roll 75 arranged to face the seal roll 70. The cut target to which the elastic members 15 to 17 and 19 are attached is sandwiched so that the inner sheet layer 12H is on the seal roll side, and only the portion sandwiched between the cut convex portion 72 and the outer peripheral surface of the anvil roll 75 is the elastic member. 15, 16 and 19 are pressurized and heated to cut. In the product subjected to such processing, as shown in FIGS. 24A and 24B, the space between the outer sheet layer 12S and the inner sheet layer 12H is continuous from the elastic members 15, 16 and 19 of the expansion / contraction region A2. Only the uncut portion remains as the unnecessary elastic member 18.

Further, FIG. 23B shows a case where almost the entire elastic members 15, 16 and 19 are finely cut, and a pressing portion 71 having a large number of cutting convex portions 73 is provided on the outer peripheral surface, and the cutting convex portions are provided. The display sheet 25 and the elastic members 15 to 17 between the inner sheet layer 12H and the outer sheet layer 12S are provided by the seal roll 70 in which the 72 is heated to a desired temperature and the surface-smooth anvil roll 75 arranged to face the seal roll 70. The cutting target to which 19 is attached is sandwiched so that the inner sheet layer 12H is on the seal roll side, and elastic members 15, 16 and 19 are added only to the portions sandwiched between the cutting convex portion 73 and the outer peripheral surface of the anvil roll 75. It cuts by pressing and heating. In the product subjected to such processing, as shown in FIG. 24 (c), between the outer sheet layer 12S and the inner sheet layer 12H, a cutting balance continuous from the elastic members 15, 16 and 19 of the elastic region A2. And the cut pieces of the elastic members that are not continuous with the elastic members 15, 16 and 19 of both elastic regions A2 remain as unnecessary elastic members 18.

According to these methods, as shown in FIG. 24, the compressed portion or the melted portion at the time of cutting remains as a cutting trace 28 in at least the outer sheet layer 12S. In some cases, the cutting trace 28 remains on the display sheet 25 and the inner sheet layer 12H. As shown in FIGS. 24 (a) and 24 (b), when the elastic members 15, 16 and 19 are cut only at one location in the width direction WD of the non-stretchable region A1, melting marks, compression marks and the like are cut. Even if the trace 28 remains, the area becomes small, and there is an advantage that the display on the display sheet 25 is less likely to be difficult to see due to the overlapping of the cutting traces 28 and the like. In particular, as shown in FIG. 24B, when the elastic members 15, 16 and 19 for forming the non-stretchable region A1 are cut at a position other than the center in the width direction of the non-stretchable region A1, the position of the cut trace 28 is obtained. Is not in the center and is less likely to interfere with the display of the display sheet 25, which is preferable. The cutting pattern may be a straight line as shown in the figure, or may have an appropriate shape such as a dogleg shape or a zigzag shape.

The heating temperature (temperature of the cutting convex portion) for cutting the elastic members 15, 16 and 19 may be appropriately determined as long as the elastic members 15, 16 and 19 can be reliably cut, but the production line is high speed. In order to reliably cut the elastic members 15, 16 and 19 and prevent the cut portions of the elastic members 15, 16 and 19 from adhering to the surrounding members, the temperature is lower than the melting point of the elastic members 15, 16 and 19. However, it is preferable that the temperature is sufficiently high. When the elastic members 15, 16 and 19 are cut at such a high temperature, when the melting points of the outer sheet layer 12S and the inner sheet layer 12H are lower than the cutting temperature, the inner sheet layer 12H is subjected to the elastic members 15, 16 and 19. Although there is a possibility that melting marks may remain or holes may be formed at the cut portion, the influence on the outer sheet layer 12S is reduced by the heat insulating effect of the display sheet 25. Generally, the melting points of the non-woven fabrics used for the outer sheet layer 12S and the inner sheet layer 12H are about 160 to 175 ° C., the melting points of the elastic members 15, 16 and 19 are about 200 to 230 ° C., and the heating temperature is 180 to 180 to. It can be 200 ° C.

On the other hand, due to pressurization and heating during cutting of the elastic members 15, 16 and 19, the cut ends of the elastic members 15, 16 and 19 adhere to the inner surface of the display sheet 25, and the display sheet 25 contracts. Since there is a risk, it is also a preferable form to apply a release agent to at least the inner surface of the display sheet 25. As the release agent, silicone-based, fluorine-based, long-chain aliphatic, etc. can be used without particular limitation.

The unnecessary elastic member 18 may remain on the outside of the display sheet 25 at a position overlapping the code printing portion 26, or a cutting mark 28 may remain on the non-woven fabric layer covering the outside of the display sheet 25 as shown in FIG. 24 (c). Then, the reading rate may decrease. Further, even if the unnecessary elastic member 18 remains inside the display sheet 25 as shown in FIG. 24B, unevenness is formed in the code printing portion 26 if it overlaps with the code printing portion 26. , The reading rate may decrease. Therefore, as shown in FIG. 24A, it is desirable that the region overlapping the code printing portion 26 does not have a cutting trace 28 of the elastic member or an unnecessary elastic member 18.

<Example of tape-type disposable diapers>
27 to 33 show an example of a tape-type disposable diaper, reference numeral X in the figure indicates the entire width of the diaper excluding the connecting tape, and reference numeral L indicates the total length of the diaper in the cross-sectional view. The dotted pattern portion indicates the portion where the hot melt adhesive is applied.

This tape-type disposable diaper includes an absorbent element 50 extending from the lower abdomen through the crotch to the buttocks along the center in the width direction, and a liquid-permeable top sheet 30 covering the front side of the absorbent element 50. It has a liquid-impermeable sheet 11 that covers the back side of the absorbing element 50. Further, this tape-type disposable diaper has an end flap portion EF extending to the front side and the rear side of the absorbent body 56 constituting the absorbent element 50, respectively, and a pair extending laterally from the side edge of the absorbent body 56. It has a side flap portion SF of the above and a connecting tape 13 provided on the side flap portion SF on the back side. As shown in the illustrated example, the side edge of the side flap portion SF in the middle in the front-rear direction preferably has a shape recessed toward the center in the width direction along the circumference of the leg, but has a linear shape along the front-rear LD. It may be.

More specifically, the entire outer surface of this tape-type disposable diaper is formed of the exterior sheet 11C, and the liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 11C with an adhesive such as a hot melt adhesive. Further, the absorbing element 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order on the inner surface side of the liquid impermeable sheet 11. The top sheet 30 and the liquid impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction LD and the width direction WD than the absorbing element 50, and the liquid impermeable sheet 11 is the top sheet 30. It is formed slightly wider than the above. The exterior sheet 11C may be omitted, in which case the liquid permeable sheet 11 extends to the side edges of the tape-type disposable diaper.

(Three-dimensional gather)
In order to prevent lateral leakage of urine and loose stools that travel laterally on the top sheet 30 and prevent lateral leakage, it is preferable to provide three-dimensional gathers 60 that project (stand up) toward the surface to be used on both sides of the product. The three-dimensional gather 60 is composed of a gather sheet 62 and an elongated gather elastic member 63 fixed to the gather sheet 62 in an extended state along the LD in the front-rear direction. As shown in FIGS. 27 and 28, a plurality of gather elastic members 63 may be provided, or one gather elastic member 63 may be provided.

The three-dimensional gather 60 has a fixing start end in the width direction on the side portion of the top sheet 30, and the portion outside the width direction from the fixing start end is located on the side portion of the liquid impermeable sheet 11 and outside in the width direction. It is fixed to the side portion of the exterior sheet 11C to be formed by a hot melt adhesive or the like. The inside of the three-dimensional gather 60 in the width direction from the fixed start end is fixed on the top sheet 30 at both ends in the front-rear direction, but the portion between them is a non-fixed free portion, and this free portion is the contraction of the gather elastic member 63. It stands up by force and sticks to the legs. As a result, so-called lateral leakage is prevented.

(Plane gather)
An elastic member 64 around the leg made of rubber thread or the like is fixed to each side flap portion SF in a state of being extended along the front-rear direction LD, whereby the leg circumference portion of each side flap portion SF is formed as a flat gather. It is configured. In the illustrated example, the leg circumference elastic member 64 is provided between the gather sheet 62 and the liquid impermeable sheet 11 in the side flap portion SF, but is provided between the liquid impermeable sheet 11 and the exterior sheet 11C. It can also be placed. A plurality of elastic members 64 around the legs may be provided on each side as shown in the illustrated example, or only one elastic member 64 may be provided on each side.

(Connecting tape)
When attaching the diaper, the connecting tape 13 attached to the side flap portion SF is connected to an appropriate position on the outer surface of the front body F. As shown in FIG. 33, the connecting tape 13 of this example is provided on the mounting portion 13C attached to the side flap portion SF, the tape free portion 13B extending laterally from the mounting portion 13C, and the tape free portion 13B. It has a connecting portion 13A that is detachably connected to the outer surface of the front body F.

As the connecting portion 13A of the connecting tape 13, a hook material (male material) for a mechanical fastener (hook-and-loop fastener) may be provided, or an adhesive layer may be provided. The hook material has a large number of engaging protrusions on its connecting surface, and the shapes of the engaging protrusions are (A) -shaped, (B) J-shaped, (C) mushroom-shaped, and (D). There are T-shapes, (E) double J-shapes (shapes in which J-shapes are joined back to back), and the like, but any shape may be used. When wearing the diaper 10, the connecting tape 13 is turned from both sides of the waist to the outer surface of the front body F, and the connecting portion 13A of the connecting tape 13 is connected to an appropriate position on the outer surface of the front body F.

As shown in FIG. 33, the connecting tape 13 is not only a non-stretchable type (tab type) having no stretchable region, but also a stretchable portion in which at least a portion between the mounting portion 13C and the connecting portion 13A expands and contracts in the width direction WD. A type (side panel type) can also be adopted.

(Target tape)
A target tape 20 for facilitating the connection of the connecting portion 13A of the connecting tape 13 can be provided at the attachment / detachment portion of the connecting tape 13 on the front body F. When the connecting portion 13A of the connecting tape 13 is a hook material, the target tape 20 is a hook of the connecting portion 13A provided on the film layer 21 and the entire outer surface thereof, as shown in FIGS. 34 (a) and 34 (b). A film type having an engaging layer 22 with which the hooks are detachably engaged with each other can be preferably used. In this case, as the engaging layer 22, a form in which a mesh-like body knitted with threads and having a loop is attached on the film layer (FIGS. 34 (a) and 34 (b) assume this form). In addition to the above, it is known that the non-woven fabric layer of the thermoplastic resin is attached on the film layer 21 by an intermittent ultrasonic seal, and the fibers of the non-woven fabric form a loop, but any of them can be preferably used. Further, as shown in FIG. 34 (c), a filmless type target tape 20 which is made by embossing a non-woven fabric 23 of a thermoplastic resin and has no film layer can also be used. In these target tapes 20, the connecting tape 13 is bonded by the hook of the connecting tape 13 being entangled or caught in the loop. On the other hand, when the connecting portion 13A of the connecting tape 13 is an adhesive layer, the target tape 20 can be formed only by the film layer.

(Code printing department)
When this tape-type disposable diaper is used as the disposable diaper used in the first example and the third example of the excretion detection system described above, code printing in which a one-dimensional or two-dimensional code including the unique information of the IC tag 120 is printed is printed. A portion 26 is provided. The one-dimensional or two-dimensional code of the code printing unit 26 is optically readable.

The code printing unit 26 prints on the exterior sheet 11C or the liquid-impermeable sheet 11, or provides a display sheet 25 similar to a pants-type disposable diaper between the exterior sheet 11C and the liquid-impermeable sheet 11, and this display is provided. It can be printed on the sheet 25.

Further, in the tape type disposable diaper, since the target tape 20 is printed with a scale, a pattern, etc. as a guideline for fastening the connecting tape 13, the code printing unit 26 is similarly printed on the target tape 20. It is also preferable to print on. However, when the target tape 20 is a film type having a film layer and an engaging layer provided on the outer surface of the film layer to which the hook engages, the cord printing unit 26 is printed on the film layer. In that case, since the code is read in a state where the engaging layer is partially or wholly present on the code, the reading rate may decrease.

Therefore, when the target tape 20 is a film type, as shown in FIGS. 34 (a) and 34 (b), the target tape 20 has a code printing unit 26 on which a two-dimensional code is printed on the end portion 20e of the film layer 21. It is one preferable form that the end portion 20e having the code printing portion 26 is not joined to the outer surface of the front body F. Although not shown, the end portion 20e having the cord printing portion 26 can be detachably joined to the outer surface on the ventral side, but in that case, the cord printing portion 26 is torn or the adhesive remains after the peeling. , It is necessary not to be unclear. The target tape 20 is fixed to the outer surface of the diaper via the hot melt adhesive H at a portion other than the end portion 20e having the cord printing portion 26.

The end portion 20e having the code printing portion 26 is an end portion 20e on one side in the width direction of the target tape 20 as shown in the figure, an end portion 20e on both sides, or one side or both sides of the LD in the front-rear direction. It can be the end portion 20e of.

As shown in FIG. 34A, the end portion 20e having the code printing portion 26 of the target tape 20 is in a form in which the end portion 20e having the code printing portion 26 is folded back in the product state, and in addition, FIG. As shown in b), the end portion 20e having the code printing portion 26 may be in a form in which the end portion 20e is not folded back in the product state.

In this case, the code printing unit 26 is preferably printed on the surface of the film layer 21 opposite to the engaging layer 22 (the surface to be attached to the outer surface of the diaper), but is printed on the surface on the engaging layer 22 side. In that case, the code of the code printing unit 26 is optically read through the film layer 21, so that the light transmittance of the film layer 21 in the thickness direction is preferably 80% or more. The light transmittance is measured as follows using, for example, an illumination metering type color difference meter Z-300A manufactured by Nippon Denshoku Industries Co., Ltd. That is, first, measurement is performed in a state where a shield that blocks light is arranged between one detection unit and the other detection unit, and zero point correction is performed. Next, after removing the shield arranged between one detection unit and the other detection unit, measurement is performed in a state where there is nothing blocking the light, and standard correction is performed. Next, the outer surface sheet, which is an object, is measured in a state of being arranged between one detection unit and the other detection unit.

In the film type target tape 20 configured as described above, the end portion 20e having the code printing portion 26 in the product state remains as it is in the form in which the end portion 20e having the code printing portion 26 is turned up in the product state. In the non-turned form, the two-dimensional code can be read directly (that is, without the influence of the engaging layer 22) after the end portion 20e is turned over. When the end portion 20e including the code printing portion 26 is folded outward as in the form shown in FIG. 34 (a), the code can be read without the work of turning over the end portion 20e. There is an advantage. On the other hand, in the form in which the end portion 20e having the code printing portion 26 is not folded back as in the form shown in FIG. 34 (b), the folded back portion does not get in the way and the code is not read. Sometimes the code is hidden, which makes it look great.

As shown in FIG. 34 (c), when the target tape 20 is a filmless type, the printing target must be the non-woven fabric 23, and the fibers of the non-woven fabric 23 are thick and sparse, so that the high definition is high. Printing is difficult and not suitable for code printing. Therefore, as suitable for such a case, the non-woven fabric 23 of the target tape 20 is intentionally subjected to heat / pressure processing such as heat embossing to melt the fibers at appropriate positions and crush them flat in the thickness direction to form a film. It is also proposed to provide a unit 23f, print a one-dimensional or two-dimensional code on the film-forming unit 23f to provide a code printing unit 26, and make the code of the code printing unit 26 optically readable.

In the case of the filmless type, the code printing unit 26 can be formed on the outer surface of the filming unit 23f, but in that case, the printing ink comes into direct contact with the skin, so that the code printing unit 26 is as shown in the figure. It is preferable that the film is printed on the inner surface of the filming section 23f. In that case, the code of the code printing section 26 is optically read through the filming section 23f, so that light is transmitted in the thickness direction of the film layer 21. The rate is preferably 80% or more.

Since the other parts are the same as those of the pants-type disposable diaper, the same reference numerals are given in the drawings and the description thereof will be omitted. For example, the IC tag 120 in the tape-type disposable diaper can be the same as the IC tag 120 in the pants-type disposable diaper, including its arrangement. Further, as the exterior sheet 11C of the tape type disposable diaper, the sheet material used for the outer sheet layer 12S and the inner sheet layer 12H of the pants type disposable diaper can be used.

<Explanation of terms>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

-The "front-back direction (vertical direction)" means the direction connecting the ventral side (front side) and the dorsal side (rear side), and is indicated by the symbol LD in the figure. Further, the "width direction" means a direction (horizontal direction) orthogonal to the front-rear direction, and is indicated by the symbol WD in the drawing. Further, the "thickness direction" means a direction orthogonal to the front surface and the back surface.

-"Front side" means the one closer to the skin when worn, and "back side" means the one farther from the skin when worn.

-"Unfolded state" means a state in which the natural length is completely flattened and unfolded without contraction or slack.

-"Elongation rate" means a value when the natural length is 100%.

-"Gel strength" is measured as follows. To 49.0 g of artificial urine, 1.0 g of a highly absorbent polymer is added and stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I. techno Engineering).

-"Artificial urine" includes urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97. It is a mixture of .09 wt% and is used at a temperature of 37 ° C. unless otherwise specified.

・ "Metsuke" is measured as follows. After the sample or test piece is pre-dried, it is left in a test room or device in a standard state (the test place is a temperature of 23 ± 1 ° C. and a relative humidity of 50 ± 2%) to bring it into a constant weight state. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. From the test piece in a constant amount, a sample having a size of 100 mm × 100 mm is cut out using a sample collecting template (100 mm × 100 mm). The weight of the sample was measured, 10 0 times to calculate the weight per square meter, a basis weight.

-The "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of ^{a load of 0.098 N / cm 2} and a pressurized area of 2 cm ^2.

-The water absorption amount is measured by JIS K7223-1996 "Water absorption amount test method for highly water-absorbent resin".

-The water absorption rate shall be the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for highly water-absorbent resin" was performed using 2 g of highly absorbent polymer and 50 g of physiological saline. ..

-If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). do.
-Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

The present invention can be applied to all disposable diapers such as pants-type disposable diapers, tape-type disposable diapers, pad-type disposable diapers, etc. as in the above example, and other absorbent articles such as sanitary napkins. Needless to say, it can also be applied to.

A1 ... non-stretchable area, A2 ... stretchable area, L ... intermediate area, LD ... front-back direction, LO ... leg opening, T ... waist circumference area, U ... waist lower part, W ... waist part, WD ... width direction, WO ... Waist opening, 11 ... Liquid permeable sheet, 11C ... Exterior sheet, 12 ... Exterior, 12A ... Side seal, 12F ... Front exterior, 12B ... Rear exterior, 12H ... Inner sheet layer, 12S ... Outer sheet Layer, 12r ... Waist side folded part, 13 ... Connecting tape, 14 ... Butt cover part, 18 ... Unnecessary elastic member, 20 ... Target tape, 22 ... Cutting trace, 25 ... Display sheet, 25f ... Folded part, 26 ... Code printing Part, 27 ... Picture printing part, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 56S ... Slit, 58 ... Packaging sheet, 60 ... Three-dimensional gather, 62 ... Gather sheet, 200 ... Interior Body, 201 ... Inner / outer fixing parts, H1, H2 ... Hot melt adhesive, 110a-110c, 210a-210c ... Disposable diapers, 111a-111c ... Two-dimensional code, 120, 120a-120c ... IC tag, 121a-121C ... Antenna Units, 122a to 122c ... IC chips, 140 ... readers, 141a to 141c ... antenna units, 142 ... communication units, 143 ... control units, 150 ... smartphones, 151 ... cameras, 152 ... communication units, 153 ... speakers, 154 ... Touch panel type liquid crystal screen, 155 ... control unit, 160 ... application, 161 ... initial screen, 1611 ... disposable diaper wearer registration button, 1612 ... registrant management button, 1613 ... setting change button, 1614 ... detection start / end button, 240a ~ 240c ... Reader with notification function, 241a to 241c ... Antenna section, 242a to 242c ... Speaker, 243a to 243c ... LED lighting section, RW1 ... First radio wave, RW2 ... Second radio wave, RW3 ... Third radio wave.

Claims (10)

An absorbent article having a liquid-permeable top sheet, a liquid-impermeable sheet, and an absorber provided between them.
It has a passive type IC tag provided on the front side of the liquid impermeable sheet, and has.
The IC tag is configured to transmit a radio wave including the specific information when receiving radio waves from the outside, at least one of the received radio wave and transmitting radio waves Ri der possible shielding by excretion surrounding liquid,
It is provided with a code printing unit on which a one-dimensional or two-dimensional code corresponding to the unique information of the IC tag is printed.
Ru optically readable der the one-dimensional or two-dimensional code of the code printing unit,
Absorbent article characterized by that. It has a display sheet having the code printing portion and one or more non-woven fabric layers covering the outside of the display sheet.
In the area of the display sheet that overlaps with the code printing portion, all layers outside the display sheet have a gap equal to or larger than the module dimension of the one-dimensional or two-dimensional code in the arrangement direction of the one-dimensional or two-dimensional code module. It is bonded via a transparent or translucent hot melt adhesive with a dense pattern that does not have
The region of the display sheet that overlaps with the code printing portion is a non-stretchable region that has no elasticity other than the non-woven fabric layer and the hot melt adhesive between the layers on the outside of the display sheet.
The one-dimensional or two-dimensional code of the code printing unit can be optically read through the non-woven fabric layer located on the outside of the display sheet and the hot melt adhesive between the layers.
The absorbent article according to claim 1. The total thickness of the non-woven fabric layer covering the outside of the display sheet is equal to or less than the module dimension of the one-dimensional or two-dimensional code in the arrangement direction of the module of the one-dimensional or two-dimensional code.
The absorbent article according to claim 2. It has a member located inside the display sheet, and the area of the display sheet that overlaps with the code printing portion is not joined to a member adjacent to the inside of the display sheet.
The absorbent article according to claim 2 or 3. The exterior body that constitutes the front body and the exterior body that constitutes the back body are individually or integrally provided, and the interior body including the absorber is attached from the exterior body that constitutes the front body to the exterior body that constitutes the back body. Be,
Both side portions of the exterior body constituting the front body and both side portions of the exterior body constituting the rear body are joined to form a waist opening and a pair of left and right leg openings.
At least one of the exterior body constituting the front body and the exterior body constituting the rear body has a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and the width direction of the non-stretchable region. It has elastic areas provided on both sides,
The elastic region has a plurality of elongated shapes attached to an inner sheet layer, an outer sheet layer composed of a non-woven fabric layer, and between the inner sheet layer and the outer sheet layer at intervals in the front-rear direction along the width direction. It is a region that elastically expands and contracts in the width direction with the expansion and contraction of the elastic member.
The non-stretchable region is a region having an inner sheet layer and an outer sheet layer continuous from the stretchable region and an unnecessary elastic member remaining between the inner sheet layer and the outer sheet layer, and does not elastically expand and contract in the width direction.
Pants type disposable diapers
At least the code printing portion of the display sheet is provided inside the outer sheet layer in the non-stretchable region.
The absorbent article according to any one of claims 2 to 4. It is provided with connecting tapes provided on both sides of the dorsal side and target tapes attached to the outer surface of the ventral side.
The connecting tape has a large number of hooks for attaching and detaching to and from the target tape.
The target tape has a film layer and an engaging layer provided on the outer surface of the film layer to which the hook engages.
Tape type disposable diaper,
The target tape has the cord printing portion at the end portion of the film layer, and the end portion having the cord printing portion is unbonded to the ventral outer surface or is detachably bonded.
The absorbent article according to claim 1. In the product state, the end having the code printing portion is not folded back.
The absorbent article according to claim 6. It is provided with connecting tapes provided on both sides of the dorsal side and target tapes attached to the outer surface of the ventral side.
The connecting tape has a large number of hooks for attaching and detaching to and from the target tape.
The target tape is made of a non-woven fabric made of a thermoplastic resin.
Tape type disposable diaper,
The target tape has a filming section, and the filming section has the code printing section.
The one-dimensional or two-dimensional code of the code printing unit can be optically read.
The absorbent article according to claim 1. The light transmittance in the thickness direction of the filmed portion is 80% or more, and the code printing portion is provided on the inner surface of the filmed portion.
The absorbent article according to claim 8. The IC tag is provided in a plurality of places.
The absorbent article according to any one of claims 1 to 9.

Images