JP2013066517A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article such as a urine pad to be disposed on the inner side of an outer wearing article such as a diaper, underwear, or a pad holder, capable of easily confirming urination.SOLUTION: The absorbent article includes a front surface sheet, a rear surface sheet, and an absorbent body with an absorber. The absorbent article has a vertical direction connecting an abdominal portion and a back portion via a crotch portion, and a lateral direction intersecting the vertical direction. The absorbent article is used with the absorbent body placed on the inner side surface of the outer wearing article. The absorbent article has an overhanging part which overhangs outward in the lateral direction of the article and which can be turned back to the rear sheet side on either side of the absorbent body. The overhanging part includes an indicator part which is discolored in contact with a liquid and a liquid diffusive sheet which are disposed between two layers of virtually impermeable sheets in such a way as to be in contact with each other. The liquid diffusive sheet is inserted into the absorbent body from the overhanging part to be disposed in contact with the absorber between the absorber and the front surface sheet or between the absorber and the rear surface sheet.

Description

  The present invention relates to an absorbent article having overhang portions on both sides in the width direction.

  Some absorbent articles such as diapers apply a technique for visually informing a guardian, a caregiver, or the like that urination or the like has been absorbed and held in an absorber. For example, there is a method of visually recognizing the discoloration by providing an indicator that changes color when it comes into contact with moisture between the back sheet and the absorber, and enabling the see-through from the back sheet side (see, for example, Patent Documents 1 to 3). Some urine pads for adults, such as those placed on diaper absorbers or underwear, can be seen through from the back sheet side of the urine pad by providing an indicator between the back sheet and the absorber. . On the other hand, there exists a technique which provides the hole for making it easy to visually recognize the indicator of an internal urine pad in the absorber of the diaper main body which covers an outer side (refer patent document 4).

Japanese Patent Laid-Open No. 11-4852 JP 2004-222868 A Japanese Utility Model Publication No. 58-7809 JP 2007-97627 A

  The techniques disclosed in Patent Documents 1 to 3 are based on the premise that an indicator is arranged in the center of the diaper, and do not consider arranging the indicator inside the outer wearing article like a urine collecting pad. Assuming that a urine collecting pad with an indicator provided at the center of the article is used inside a diaper, underwear, pad holder or the like as in the above document, it is difficult to visually recognize the indicator from the outside. Usually, the inner indicator cannot be confirmed unless the outer garment such as a diaper is moved or the belly around the diaper is widened and opened. Moreover, in the technique of the said patent document 4, since there exists a hole in the absorber by the side of a diaper, the absorption performance will fall inevitably. If it is possible to make it easier to confirm the replacement time of the internal urine collection pad without degrading the inherent absorption performance of the absorbent body and wearing an absorbent article or underwear, the convenience is greatly improved. Considering that urination is frequent during the day, unlike defecation, it is possible for the user or caregiver to greatly improve the annoyance associated with replacing the urine collection pad.

  Accordingly, the present invention provides an absorbent article such as a urine pad that can be used by placing it inside an outer-wearing article such as a diaper, underwear, or pad holder, and makes it easy to confirm that urination has occurred. With the goal.

  The present invention comprises a liquid-permeable top sheet disposed on the skin contact surface side, a waterproof back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between the two sheets. An absorbent article having an absorbent main body portion, the absorbent article having a longitudinal direction in a direction connecting the abdominal side portion and the back side portion via the crotch portion and a width direction intersecting with the longitudinal direction. The absorber portion is used by being placed on the inner side surface of the outer-wearing article, and can be folded back to the back sheet side projecting outward in the article width direction on both sides of the absorbent main body. There is an overhanging part, and the overhanging part is arranged between two layers of liquid-impervious sheets so that the indicator part that changes color when in contact with the liquid and the liquid-diffusible sheet are in contact with each other. The liquid diffusive sheet enters the absorption main body from the overhanging portion, Between the absorber and the topsheet, or it is to provide an absorbent article that is disposed so as to contact with the absorber led to between the absorber and the backsheet.

  The absorbent article of the present invention is an absorbent article such as a urine pad that can be used by placing inside an outer-wearing article such as a diaper, underwear, or pad holder, and is excellent in that it is easy to confirm that urination has occurred. There is an effect.

It is a partially cutaway perspective view schematically showing a state in which the urine collecting pad as one embodiment (Embodiment 1) in the absorbent article of the present invention is developed and slightly curved along the crotch. It is a top view which shows typically the state which expand | deployed and extended | stretched the urine collection pad of FIG. It is an expanded sectional view of the III-III line cross section of FIG. It is an expanded sectional view of the IV-IV line section of Drawing 1, (a) shows the state where the wing part before wearing was extended, and (b) shows the state where the wing part was folded and fixed to clothes. It is an expanded sectional view equivalent to FIG. 3 in the urine collection pad as another embodiment (Embodiment 2) of this invention. It is explanatory drawing which shows typically the other preferable plane arrangement | positioning in the indicator in a wing part, and a liquid diffusable sheet.

(Embodiment 1)
FIG. 1 is a partially cutaway perspective view schematically showing a state in which a urine collecting pad as a preferred embodiment (Embodiment 1) in the absorbent article of the present invention is developed and slightly bent along the crotch. . 2 is a plan view of the elongated state of FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG. FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV in FIG. 1, (a) shows a state where the wing part before wearing is extended, and (b) shows a state where the wing part is folded and fixed to the clothes w. Show. In addition, in order to demonstrate the relationship between the wing | wing part 5 and the back surface sheet 2 in FIG.4 (b), the clothing w was shown with the dashed-two dotted line.

  As shown in FIG. 1, the urine collecting pad 10 of Embodiment 1 includes a liquid-permeable top sheet 1 disposed on the skin contact surface side, and a waterproof back sheet disposed on the non-skin contact surface side. 2 and an absorbent main body portion 10a made of an absorbent body 3 interposed between the two sheets and a wing portion 5 as an overhanging portion projecting outward in the width direction. The absorption main body 10a is rectangular in plan view, and includes an abdominal side F disposed on the wearer's abdomen, a crotch C extending along the crotch, and a back side R disposed on the back. It consists of each part.

  In the present invention, unless otherwise noted, the side relatively close to the human body when worn by the wearer (typically, the side that comes in contact) is the skin surface side, the skin contact surface side, or the surface side. The inner side is referred to as the non-skin surface side or non-skin contact surface side or the back side or outer side. The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. The normal direction of the front surface or the back surface of the absorbent article is referred to as the thickness direction. Furthermore, in the plan view of the absorbent article, a direction from the ventral side F to the back side R via the crotch C is referred to as a vertical direction (Y direction in FIG. 1), and a direction orthogonal to the vertical direction is the width direction. (X direction in FIG. 1). The vertical direction typically coincides with the front-rear direction of the human body when worn. Further, the overhanging portion (wing portion) is referred to as a surface direction that coincides with the skin surface side or the non-skin surface side of the absorbent main body portion in the expanded and elongated state. Moreover, an outer-wearing article refers to the wearing article which can arrange | position and fix the absorbent article of this invention inside, and is specifically an underwear, a diaper, or a pad holder.

  In the urine collecting pad 10, the top sheet 1 exists so as to cover the skin contact surface side of the absorbent body 3 formed by covering the absorbent core 31 with the covering sheet 32 up to the left and right edges in the width direction (see FIG. 1). ). Further, a pair of side sheets 4, 4 are laminated on the skin contact surface side of the top sheet 1 with a length that matches the longitudinal direction of the top sheet 1, and respectively extend outward in the width direction left and right side edges of the absorbent body 3. (See FIGS. 1 and 2). The extending part of the side sheet 4 and the extending part of the back sheet 2 in the width direction are laminated and joined on the outer side in the width direction (see FIGS. 1 and 2). The side sheet 4 has a free end 41 that forms an orthostatic leak-proof cuff as a three-dimensional gather forming member, and the three-dimensional gather elastic member 42 built in the free end 41 is in the longitudinal direction of the urine collecting pad when worn. And stand up so as to protrude toward the skin surface of the wearer (see FIGS. 3 and 4). As a result, the free edge 41 firmly abuts the skin, effectively blocking excretion to the outside and effectively preventing side leakage. It is preferable that the elastic member for three-dimensional gathers is disposed at least in the crotch portion C and further extends to the abdominal side F and / or the back side R. As the bonding method, a normal method used for this type can be used. 3 and 4 are illustrated in a state where the three-dimensional gather is raised for the sake of understanding, but is not raised in the expanded and deployed state of FIG.

  The urine pad 10 is formed with a wing portion 5 as an overhanging portion protruding outward from the edge in the left-right width direction in the vicinity of the crotch portion C of the absorbent body portion 10a in plan view (see FIG. 5). 2). The wing part 5 is configured such that an indicator part (indicator) 6 that changes color when in contact with the liquid and the liquid diffusible sheet 7 are disposed between the two layers of the liquid-impervious sheet. (See FIG. 3). Here, the difficult liquid permeability means a property that hardly allows the liquid to pass through, and includes waterproof properties, water repellency, and liquid impermeability properties. In the first embodiment, the two layers of the hardly liquid-permeable sheet are a water-repellent front side sheet 51 and a waterproof back side sheet part 52. The front sheet portion 51 is a sheet disposed on the same surface side as the top sheet 1 of the absorbent main body 10a in a state where the urine collecting pad 10 is expanded and extended. The front-side sheet 51 is folded in a mountain when the urine collecting pad 10 is attached and comes into contact with the skin of the wearer's crotch and the like, and is disposed on the non-skin-contacting side rather than the outer wearing article such as an underwear or a diaper cover. (See FIG. 4). On the other hand, the back side sheet | seat 52 is a sheet | seat distribute | arranged to the same surface side as the back surface sheet 2 of the absorption main body part 10a in the said expansion | deployment state. The back sheet 52 is arranged so as to be folded at the time of wearing and contact the outer wearing article (see FIG. 4). Moreover, the front side sheet | seat 51 becomes a non-skin contact side rather than an outer side wearing article at the time of mounting | wearing, and can be visually recognized from the outer side of this outer side wearing article. Therefore, it is preferable that the front sheet 51 has a high light transmittance so that the discoloration of the indicator 6 inside the wing portion 5 can be visually recognized.

The wing portion 5 having such a configuration has a wing outer peripheral edge portion 5s so as to draw a gentle trapezoidal curve from the wing base end position 5t, which is a boundary with the absorption main body portion 10a, in the plan view. (See FIG. 2). Furthermore, the wing part 5 has entered the inside of the absorption main body part 10a beyond the wing base end position 5t. The front side sheet 51 and the liquid diffusive sheet 7 in the part where the wing part 5 has entered further reach the skin contact surface side of the absorbent body 3 (region g _{2 in} FIGS. 2 and 3), and the top sheet 1 and the absorbent body 3 (See FIGS. 2 and 3). Thus, when the liquid diffusable sheet 7 of the wing part 5 reaches the absorber 3, an appropriate amount of water in the excretory liquid absorbed by the absorber 3 can be accurately guided to the indicator 6 and discolored in a timely manner. Occurs. Thereby, even if the absorbent body 3 portion of the urine collecting pad 10 is placed on the inner side surface of the outer wearing article and used, the discoloration of the indicator 6 on the outer side of the outer wearing article is recognized, and the urine collecting pad is recognized. 10 wetness can be known. And it is possible to know the replacement time of the urine collecting pad 10 in a timely manner. The configuration of the part where the wing part 5 enters the absorption body part 10a and the details of the mechanism of action will be described later. In the present invention, the wing portion refers to a member that can be folded back and positioned on the outer surface of clothing or the like, and the shape is not limited to the wing shape as shown in FIG.

  As described above, between the front side sheet 51 and the back side sheet part 52, the indicator 6 that visually changes when it comes into contact with the liquid and detects the excretion of the liquid is coated. The visual change of the indicator 6 is visible through the front side sheet 51. The indicator 6 has a function of reacting to moisture such as urination, and is formed using a hydrophilic composition containing a color indicator whose color changes according to a change in pH, for example. “Visual change” or “discoloration” means a color change from one color to another, loss of color from colorless to colorless, and appearance of color from colorless to colored by contact with moisture. .

  The indicator 6 is disposed so as to contact the liquid diffusable sheet 7 as described above. This “arrangement so as to be in contact with” means that the liquid diffusion function of the liquid diffusable sheet 7 actively draws the amount necessary for discoloration of the liquid in the absorber 3 toward the indicator 6, and as a result, the indicator 6 For example, as shown in FIGS. 2 and 3, the wing portion 5 is preferably disposed so as to overlap the liquid diffusable sheet 7 in the thickness direction. In Embodiment 1, the belt-like liquid diffusable sheet 7 having a length in the article width direction (X direction) is wider than the width of the indicator 6 and the width of the liquid diffusable sheet 7 on the skin contact surface side. An indicator 6 is coated in the central portion. With such an arrangement, it becomes possible to guide body fluid such as urine to the indicator part in a wide range, and it becomes easier to visually recognize that the indicator is gradually discolored as the amount of urination increases. It is preferable because the timing for exchanging articles can be easily measured.

  It is preferable that a plurality of the liquid diffusable sheets 7 are arranged at intervals in the longitudinal direction of the article (Y direction) at least in the part that enters the absorbent main body 10a. Such an intermittent arrangement is effective in preventing liquid leakage because the area of the liquid drawing region necessary for discoloration of the indicator 6 can be minimized. Further, the amount of urine drawn is increased near the urination point portion, and the discoloration of the portion becomes easy to see due to the difference in the discoloration amount from the other portions, so that the timing of article replacement can be easily measured. In the first embodiment, the strip-shaped combination of the liquid diffusable sheet 7 and the indicator 6 disposed thereon is provided with four strips on each of the left and right wing portions 5 at equal intervals in the article longitudinal direction (Y direction). They are spaced apart. In this way, the band-shaped indicator 6 and the liquid diffusive sheet 7 are arranged at equal intervals not only in the portion where the wing portion 5 enters the absorption main body portion 10a but also over the entire protruding wing portion 5, thereby urinating. The amount of color change of the indicator tends to increase in the vicinity of a large amount, and it is easy to visually confirm that the color change of the indicator gradually occurs as the amount of urination increases, making it easy to measure the timing of replacement. It is preferable.

  Further, in the urine pad 10, the portion of the wing portion 5 where the liquid diffusable sheet 7 is not disposed is formed by joining the water-repellent front sheet 51 and the waterproof back sheet 52 and arranging the liquid diffusible sheet 7. It is preferable that the liquid diffusibility portion 8 is relatively inferior in liquid diffusibility as compared with the existing portion (see FIG. 2). In the liquid non-diffusible portion 8, it is preferable that the front side sheet 51 and the back side sheet 52 have a hydrophobic bonding form, and in particular, a hydrophobic adhesive, a heat sealing process or an ultrasonic sealing process between the both sheets. Etc. are preferable. With such a configuration, moisture is preferentially induced in the indicator 6 portion, and the color change timing of the indicator 6 is improved. Further, since it is difficult for excessive moisture to be guided to the wing portion 5, it is useful for suppressing moisture from leaking outside through the wing portion 5.

In order to achieve both the preferential guidance of the liquid to the indicator 6 as described above and the prevention of side leakage of liquid by suppressing unnecessary liquid diffusion, the width of each indicator 6 (length in the longitudinal direction of the article) (w ₁ ) , the ratio of the width of each liquid diffusive sheet 7 (the length of the article longitudinal) (w _2), and a width (in the article longitudinal length) of each liquid flame diffusing section _{8 (w 3) (w 1} / w ₂ / w ₃ ) is preferably 1 / 1.5 / 1 to 1/3/5, and more preferably 1/2/1 to 1/3/4. By being within the above-mentioned range, it becomes easy to achieve both good body fluid drawability and body fluid leakage control in the wing portion. In addition, by making the wing part larger than the above lower limit, it becomes easy to design the wing part to a size that can be fixed to an underwear, a diaper, or a pad holder. It becomes easy to design the size to be mounted without overlapping.

  Further, in the present invention, the liquid diffusive sheet 7 extends beyond the wing part 5 to the absorption main body part 10a. More specifically, the liquid diffusable sheet 7 is formed of the top sheet 1 and the absorber 3. Or between the back sheet 2 and the absorber. In this Embodiment 1, it is the former form. With these configurations, moisture such as urine excreted in the absorbent article is easily guided to the wing part 5, and the timing of discoloration of the indicator 6 becomes more appropriate. When the liquid diffusable sheet 7 is disposed between the top sheet 1 and the absorber 3 as in the first embodiment, it is suitable for knowing the urination time early. In particular, in the case of a type having a small absorption capacity, when a large amount of urine is discharged at a time, discoloration can be known faster than reaching the absorption limit, which is suitable for preventing leakage.

  As a preferable range in a plan view in which the liquid diffusable sheet 7 is disposed, from the viewpoint of both preferential guidance of the liquid to the indicator 6 and prevention of liquid side leakage by suppressing unnecessary liquid diffusion, The longitudinal end preferably has a width of 50 mm back and forth from the longitudinal center line, and more preferably has a width of 30 mm. Moreover, it is preferable from a viewpoint of the visual change with the sufficient timing of the indicator 6 that it is staying in the side part area | region of an absorber as an edge part inside a width direction. More specifically, the inner edge of the liquid diffusable sheet 7 exists outside in the width direction from the region of the width of 1/3 left and right when the absorber 3 is divided into three in the width direction on the basis of the maximum width portion. Is preferred. Moreover, when the water-repellent side sheet is provided in the width direction side part of the absorber 10 like this embodiment, the free end inside the width direction of the side sheet when the absorbent article is in the extended state It is preferable that the inner edge of the liquid diffusive sheet exists outside the edge 41. It is preferable that the said conditions are achieved in the crotch part C of an absorbent article. In addition, the shape of the absorber 3 is a so-called hourglass shape, and the maximum width in the longitudinal direction of the absorber 3 is divided into three parts. It is also possible not to. If there is no part, it is only necessary to satisfy the above conditions in the other part, and if there is no right and left 1/3 region in the crotch part C, in the ventral part or the dorsal part It is sufficient if the above conditions are satisfied.

  In the first embodiment, the indicator 6 extends to the absorption main body portion 10a, but the indicator 6 may exist only in the wing portion 5. In that case, from the viewpoint of reliably delivering the liquid in a state where the wing 5 is bent, the indicator 6 located closest to the absorption body is disposed within a distance of 20 mm from the joint end k (see FIGS. 3 and 4). It is preferable to be arranged within 10 mm, more preferably within 2 mm.

Further, the urine collecting pad 10 having the side sheet 4 will be described in detail below with reference to FIG. 3 with respect to the preferred arrangement and preferred joining structure of each member in the wing part 5 including the liquid diffusable sheet 7 and the absorbent main body part 10a. .
FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. 1, and is a cross-sectional view of a portion where the liquid diffusable sheet 7 is disposed. In FIG. 3, the description is made by dividing the region g ₁ (region g ₁₁ and region g ₁₂ ) and region g ₂ (region g ₂₁ and region g ₂₂ ) in the article width direction (X direction). The region g ₁ is a region where the side sheet 4 is laminated with the back sheet 2 via the wing part 5. More specifically, the region g ₁₁ is a base region of the wing part 5, and the region g ₁₂ is a part where the wing part 5 of the region ₁₁ rises to the skin contact surface side of the absorbent body 5. On the other hand, the area g ₂ is a near width direction (X-direction) side edges of the skin of the absorbent body 3 contacting side, overlapping the region where the three-dimensional gathers is arranged to be formed from the side sheet 4. More specifically, the region g ₂₁ is a base region of a three-dimensional gather formed from the side sheets 4, and the region g ₂₂ extends further inward in the width direction than the region g ₂₁ and forms a leak-proof cuff. It is an area up to 41.

First, a preferable member arrangement will be described. Region g ₂ is a portion to be a so-called breakwater to prevent side leakage of the liquid by the upright three-dimensional gathers. The liquid diffusive sheet 7 is arranged on the skin contact surface side of the absorbent body 3 in this region g ₂ , particularly in the region g _{22, so} that the liquid to be diffused outward in the width direction of the absorbent body 3 is captured at a good timing. Then, it can be guided to the indicator 6. Therefore, in the first embodiment, the liquid diffusive sheet 7 is disposed in direct contact with the absorber 3. Alternatively not limited to this embodiment, to allow capture of accurate liquid, the back sheet 52 of the wing portions 5 together with the liquid拡性sheet 7 may be provided a number of partial holes is extended to a region g _22. In this case, it is possible to adjust so as to suppress the liquid diffusion of the liquid more effectively. Further, the front sheet 51 of the wing portions 5 may cover the skin contact surface side of the liquid-diffusive sheet 7 extends to a region g _22, it may remain in the region g _21. Face sheet 51 as in the present embodiment 1 is that which extends to the region g _22, preferably so may inhibit liquid return to the top sheet 1 side of the liquid.
The region g ₂₁ is an area where the side sheet 4 and the topsheet 1 as the base region of the standing gathers are securely bonded and fixed at the joint 87 by adhesive or the like. Therefore, in the first embodiment, the water-repellent front side sheet 51 and the liquid diffusive sheet 7 constituting the wing part 5 are laminated and have a structure that keeps leakage resistance. Accordingly, it is preferable that the liquid guided by the liquid diffusive sheet 7 is not unnecessarily leaked to the skin contact surface side. In the present embodiment 1, the region g ₂₁ not disposed backsheet 52 waterproof wing portion 5 is liquid-diffusive sheet 7 is easy to capture and absorb body 3 contact with the liquid From the viewpoint of leakage prevention, the back sheet 52 may be disposed in this region as necessary.

The region g ₁ is a region located on the outer side in the width direction from the side edge of the absorber 3. In this region g ₁ , it is preferable that the movement of the liquid is extremely limited from the viewpoint of preventing the lateral leakage of the liquid. Therefore, in any region of the region g ₁₁ and the region g _12, wings 5, a liquid-diffusive sheet 7 is sandwiched between the back sheet 52 of waterproof and front sheet 51 of water-repellent, yet water repellent side sheets 4 and a waterproof back surface sheet 2 are preferable.

Next, a preferable joining structure will be described. It is preferable that the wing part 5 is joined to the absorption main body part 10a from the viewpoint of maintaining the liquid leakage prevention property and the fixing property of the wing part 5. In addition, when the wing part 5 is joined, it includes joining part of the constituent members of the wing part 5. In the first embodiment, the wing portion 5 and the absorption main body portion 10a are joined by a joining portion along the longitudinal direction. Looking at this junction in the thickness direction, (the junction of the side sheets 4 and the front sheet 51 of the wing portions 5) junction 86 of the region g ₁₁ and 85 (the back side sheet 52 of the backsheet 2 and the wing portions 5 a junction), a joint portion 84 of the region _{g 21} (junction between the topsheet 1 and the face sheet 51 of the wing portions 5 of the absorbent body portion 10a), the junction 81 of the region _{g 22} (absorber body portion 10a Of the top sheet 1 and the front sheet 51 of the wing portion 5). Joints 86 and 85 of the region _{g 11} may extend to a region _{g 12} necessary. In addition, there is a junction 82 and 83 of the region g ₂ (the junction between the liquid-diffusing sheet 7 and the absorber 3). These joining parts 81 to 84 and joining parts 85 and 86 are preferably joined so as to maintain leakage prevention and fixability of the wing part 5 without hindering the liquid diffusion performance of the liquid diffusable sheet 7. .

In particular, the joint 82 and 83 of the region g ₂ is a portion that liquid-diffusive sheet 7 is bonded directly to the absorbent body 3, bonding at this portion, the absorption body portion 10a by liquid diffusive sheet 7 In order to secure liquid diffusion from the wing to the wing part 5, it is preferable that the bonding form allows the liquid to pass. For example, (1) the basis weight of the adhesive at the joint is reduced, and (2) the liquid diffusive sheet portion is capable of passing liquid as an intermittent joining form in which a partial non-adhesive portion is provided at the joint. 3) A part of the joint is made of a water-soluble adhesive material.

In case of decreasing the basis weight of the adhesive joints, specifically 0.1~9g / ^{m 2,} in particular be a 0.5 to 8 g / ^{m 2,} and the wing portions 5 and the absorption body portion 10a It is preferable from the viewpoint of allowing the liquid to pass while maintaining the bonding strength. In addition, as a joining method, a method of applying hot melt adhesive roughly by spiral coating, a method of applying hot melt adhesive in a fiber shape by curtain spray coating, a method of applying a plurality of beads in a bead shape, etc. Can be adopted. In this case, it is preferable from the viewpoint of liquid passage that the width of the joint is reduced. Further, the spiral shape is preferable since it is easy to achieve a joint strength. In particular, it is preferable to combine the basis weight and the spiral.

Other than the joint 82 and 83 of the aforementioned region _{g 2,} junctions 85 and 86 of the region _{g 11,} at the junction 81 and 84 of the region _{g 2} uses the bonding forms of the foregoing (1) to (3) May be. However, since these junction parts are not the junction part which the liquid diffusable sheet 7 concerns directly, it is also preferable that the junction strength is higher than that of the junction parts 82 and 83 to improve the leak-proof property and the fixing property. As a bonding strength and a bonding method necessary for the bonding portions 85 and 86 and the bonding portions 81 and 84, a hydrophobic adhesive, an ultrasonic seal, a heat seal, and the like are preferable.
Further, in the case of adjusting the bonding strength by the basis weight, the basis weights of the joint portions 81 to 84 and the joint portions 85 and 86 are as follows: joint portion 82 ≦ joint portion 83 <joint portion 81 ≦ joint portion 84 <joint portion 86 ≦ joint. 85 is preferable.

  Next, with reference to FIG. 4, the use state of the urine collecting pad 10 will be described, and a method for detecting liquid excretion by the indicator 6 of the wing part 5 will be described. When the urine collection pad 10 is used with the urine collection pad 10 used, the unfolded urine collection pad 10 shown in FIG. 4A is oriented with the wing portion 5 inward in the article width direction along the wing base end position 5t or its peripheral position. And it bends to the side where the back sheet 2 exists, and is fixed with the adhesive 53 so that the crotch part of the clothing w which is an outer wearing article is caught. This fixed state is the use state of the urine pad, and as shown in FIG. 4 (b), the indicator 6 of the wing part 5 and the absorbent body 3 in the absorbent main body part 10a are stacked in the thickness direction. Become.

  In the first embodiment, the front side sheet 51 is reversed and disposed on the non-skin contact surface side in the mounted state. Since the front side sheet 51 is positioned outside the clothing or the like, the visual change of the indicator 6 can be recognized through the front side sheet 51 of the wing portion 5 and the outside of the clothing w. As described above, the liquid diffusable sheet 7 coated with the indicator 6 reaches the skin contact surface side of the absorbent body 3 inside the absorbent main body 10a, and is bonded to the absorbent main body 10a without hindering the liquid diffusion function. Has been. Therefore, when the excretory liquid is absorbed from the top sheet 1 to the absorber 3 and diffused in the width direction, the liquid is captured by the liquid diffusive sheet 7. Then, the liquid is accurately delivered to the indicator 6 and the indicator 6 is discolored. That is, it is possible to recognize that excreted urine or the like has been absorbed and held in the absorbent body 3 even with the urine collecting pad 10 attached to the clothes w. As a result, the urine collecting pad can be replaced in a timely manner before urine leaks. In the urine collection pad according to the first embodiment, it is not necessary to provide a hole for visual recognition in the absorbent body 3 as in the prior art, and it is not necessary to deteriorate the absorbent performance of the absorbent body. Moreover, in the urine collection pad 10 of this Embodiment 1, by providing the wing parts 5 and 5, the said crotch part C including the wearer's urination point p (refer FIG. 2) can be fixed firmly, and gap | shift can be suppressed. Here, the urination point p means a region where the urine is excreted when the wearer wears the urine collecting pad 10 and its periphery, and is a portion mainly having the crotch C as a center. If the overhang | projection part of this invention is distribute | arranged so that the area | region extended outward from the urination point p regarding a width direction may be arranged, it will be easy to obtain the visual change of a timely indicator. In the first embodiment, the wing portions 5 and 5 are disposed outward in the width direction of the crotch portion C including the urination point.

  The liquid diffusing performance of the liquid diffusing sheet 7 is indicated by the Klem water absorption height obtained by the measurement method described later. From the viewpoint of propagating the liquid to the wing part 5 quickly and accurately, the width of the Klem water absorption in the width direction is preferably 25 mm or more, more preferably 25 mm to 100 mm, and preferably 35 mm to 80 mm. Further preferred. By disposing the liquid diffusive sheet 72 having excellent liquid diffusivity in this manner, liquid diffusion in the width direction can be easily and appropriately guided and effective in changing the indicator 6. In order to effectively diffuse the liquid in the width direction, the liquid can be reliably transmitted to the indicator of the wing part by disposing a rectangular liquid diffusive sheet in the crotch part C in the vicinity of the excretion point.

  In the first embodiment, it is preferable that the front side sheet 51 of the wing portion 5 is visible to the visual change (discoloration, color disappearance, color appearance) of the indicator 6. As an index of transparency, opacity measured according to JIS P8138 is preferably 50% or less, more preferably 40% or less, and further preferably 30% or less. A method for measuring the opacity will be described later. In the first embodiment, the front sheet 51 is configured to join one sheet material to the side sheet 4, but instead of this, it is one of the sheet materials such as the side sheet 4 constituting the absorbent main body 10a. The portion may be extended to form the front side sheet 51, and a process of partially reducing the opacity may be performed. The first embodiment is preferably a napkin or a urine pad used by being attached to an underwear or a diaper cover, and the underwear or the diaper cover preferably has moisture permeability that does not impede the permeation of vapor.

In the first embodiment, the degree of waterproofness of the back sheet 52 of the wing part 5 is preferably 100 mm or more, more preferably 500 mm or more in terms of water pressure resistance, from the viewpoint of sufficiently preventing liquid permeation. Further, when the back sheet 2 or the back sheet portion 52 is moisture permeable, the degree thereof is sufficient to cause the discoloration of the indicator and maintain waterproofness, and the diaper inside the diaper and the wearer's skin to be fogged accordingly. from the viewpoint of preventing ^{the, 0.5~4.0g / (100cm 2 · h} ) are ^{preferred, 1.0~2.5g / (100cm 2 · h} ) is more preferred. By being in this range, the liquid itself reaching the back sheet 2 does not pass but only the vapor can pass. Further, although the vapor itself passes through the back side seat portion 52 of the wing portion 5, moisture condensed inside the wing portion 5 is prevented from returning to the clothing side without passing through the back side seat portion 52. By doing in this way, adhesion of the water | moisture content to clothing can be suppressed. A method for measuring the waterproofness and moisture permeability of the sheet material will be described later.

(Embodiment 2)
FIG. 5 is a drawing corresponding to FIG. 3 of a urine collecting pad 20 as another embodiment (Embodiment 2) of the present invention. In the urine collection pad 20 of the second embodiment, the liquid diffusable sheet 7 constituting the wing part 5 of the first embodiment extends between the absorber 3 and the back sheet 2. This diffusion sheet can guide the moisture from urination to the indicator 6. For example, when the liquid is gradually absorbed into the absorbent body 3 by repeated urination, the replacement time may be close at a stage where the liquid reaches the non-skin side surface of the absorbent body 3. Therefore, if the liquid can be accurately captured at that time and the indicator 6 can be discolored, it is preferable because the replacement timing of the urine collecting pad 10 can be determined in a timely manner.

In the urine collecting pad 20, the liquid that has reached the non-skin surface side of the absorbent body 3 diffuses in the width direction from the vicinity of the center line in the width direction of the absorbent body 3 by the liquid diffusible sheet 7 of the side sheet lower flat portion 42. To the vicinity of the joining end k of the sheet material. This moved the liquid passes between the face sheet 51 and the back sheet 2 of the base region g ₁₁ wing section 5, visual changes in the indicator 6 in the wing portions 5 give rise.

  As a preferable range in a plan view in which the liquid diffusable sheet 7 is disposed, from the viewpoint of both preferential guidance of the liquid to the indicator 6 and prevention of liquid side leakage by suppressing unnecessary liquid diffusion, The longitudinal end preferably has a width of 50 mm back and forth from the longitudinal center line, and more preferably has a width of 30 mm. Moreover, it is preferable from the viewpoint of the visual change with the good timing of the indicator 6 that it reaches to the width direction center vicinity of the absorber 3 as an edge part inside a width direction. More specifically, the inner edge of the liquid diffusable sheet 7 exists in the width direction inward of the region of the width of 1/3 left and right when the absorber 3 is divided into three in the width direction with the maximum width portion as a reference. It is preferable to do. It is preferable that the said conditions are achieved in the crotch part C of an absorbent article. In addition, the shape of the absorber 3 is a so-called hourglass shape, and the maximum width in the longitudinal direction of the absorber 3 is divided into three parts. It is also possible not to. If there is no part, it is only necessary to satisfy the above conditions in the other part, and if there is no right and left 1/3 region in the crotch part C, in the ventral part or the dorsal part It is sufficient if the above conditions are satisfied. Furthermore, it is preferable to reach the position corresponding to the urination point from the viewpoint of accurately capturing the liquid that is transmitted in the thickness direction of the absorber 3.

  In the second embodiment, the indicator 6 extends to the absorption main body portion 20a, but the indicator 6 may exist only in the wing portion 5. In that case, from the viewpoint of reliably delivering the liquid in a state where the wing portion 5 is bent, the indicator 6 located closest to the absorption body is disposed within a distance of 20 mm from the joint end k (see FIG. 5). In particular, it is preferable to be disposed within 10 mm, more preferably within 2 mm.

In incontinence pad 20, preferably arranged and preferred bonding structure of each member of the wing portions 5 and the absorption body portion 10a including a liquid diffusion sheet 7, as in the first embodiment described above, the area g ₁ and area g ₂ It can be explained separately. This point will be described below with reference to FIG.

First, a preferable member arrangement will be described. The region g ₂ is a region where the liquid diffusable sheet 7 is in contact with the non-skin contact side surface of the absorber 3. The liquid diffusive sheet 7 is arranged on the non-skin contact surface side of the absorbent body 3 in this region g ₂ , particularly the region g ₂₂ , so that it diffuses outward in the width direction from the non-skin contact surface side of the absorbent body 3. The liquid to be tried can be captured in a timely manner and guided to the indicator 6. Further, when the liquid diffusive sheet 7 is disposed to the vicinity of the center in the width direction of the absorbent body 3 beyond the region g _22, among the large quantities captured body fluid urination point portion of the absorbent body 3, the non-skin-contacting side Since the liquid which reached | attained can be captured earlier, it is preferable. Therefore, in the second embodiment, the liquid diffusive sheet 7 does not involve the front side sheet 51 and the back side sheet 52 and is arranged to extend to the vicinity of the center in the width direction. As a result, the liquid diffusive sheet 7 is in direct contact with the absorbent body 3 to easily capture the liquid, and in the relationship with the back sheet 2, the body fluid is easily diffused in the surface direction, so that the body fluid is placed in one place. Is difficult to concentrate, and it is difficult for the body fluid to ooze out from the back sheet 2, which is preferable because it is easy to maintain a high leak-proof property. Alternatively not limited to this embodiment, the case of extending the face sheet 51 to the region g _22, may be provided a number of partial holes to allow capture of accurate liquid. In this case, adjustment can be made to more effectively suppress the diffusion of the liquid. Furthermore, if the backsheet 52 of the wing portions 5 extends to a region g _22, it may be integrally formed with the backsheet 2.
The region g ₂₁ is a side edge region of the absorber 3 and is a region adjacent to the region g ₁ without the absorber 3. Therefore, it is preferable not to unnecessarily spreading the liquid drawn by a liquid diffusion sheet 7 in the region g _1. In the second embodiment, the water-repellent front side sheet 51 and the liquid diffusable sheet 7 constituting the wing portion 5 are laminated and have a structure that maintains leakage resistance.

The region g ₁ is a region located on the outer side in the width direction from the side edge of the absorber 3. In this region g ₁ , it is preferable that the movement of the liquid is extremely limited from the viewpoint of preventing the lateral leakage of the liquid. Therefore, in any region of the region g ₁₁ and the region g _12, wings 5, a liquid-diffusive sheet 7 is sandwiched between the back sheet 52 of waterproof and front sheet 51 of water-repellent, yet water repellent side sheets 4 and a waterproof back surface sheet 2 are preferable.

Next, a preferable joining structure will be described. It is preferable that the wing part 5 is joined to the absorption main body part 10a from the viewpoint of maintaining the liquid leakage prevention property and the fixing property of the wing part 5. In addition, when the wing part 5 is joined, it includes joining part of the constituent members of the wing part 5. In the first embodiment, the wing portion 5 and the absorption main body portion 10a are joined by a joining portion along the longitudinal direction. Looking at this junction in the thickness direction, (the junction of the side sheets 4 and the front sheet 51 of the wing portions 5) junction 86 of the region g ₁₁ and 85 (the back side sheet 52 of the backsheet 2 and the wing portions 5 a junction), the front seat of the joint 94 (absorbing joint between the back sheet 52 of the backsheet 2 and the wing portions 5 of the main body portion 10a) and the bonding portion 93 (the absorbent body 3 and the wing portions 5 of the region g ₂₁ 51). Joints 85 and 86 of the region _{g 11} may extend to a region _{g 12} necessary. In addition, the joint portions 92 (joint portion between the liquid diffusable sheet 7 and the absorbent body 3) and 91 (junction of the liquid diffusible sheet 7 and the absorbent main body portion 10a) in the region g ₂₂ (or the inner region in the width direction). There is a junction with the back sheet 2). These joint portions 91 to 94 and joint portions 85 and 86 may be joints that maintain leakage resistance and fixability of the wing portion 5 without hindering the liquid diffusion performance of the liquid diffusable sheet 7. preferable. Therefore, the joining modes (1) to (3) that allow the liquid to pass, as described in the first embodiment, can be adopted.

The bonding portions 91 and 92 of the region g ₂₂ are to be directly joined to the liquid-diffusive sheet 7, especially passage of the liquid is important. On the other hand, else, the joint 93 and 94 of the region _{g 21,} at the junction 85 and 86 of the region _{g 11,} since the liquid diffusive sheet 7 is not exposed, to increase the bonding strength than the joints 91 and 92 It is also preferable to improve leakage prevention and fixing properties. As the bonding strength and bonding method required for the bonding portions 85 and 86 and the bonding portions 93 and 94, a hydrophobic adhesive, an ultrasonic seal, a heat seal, and the like are preferable.

(Modification of wing part 5)
In any of the wing parts 5 of the first and second embodiments, if the intermittent arrangement of the indicator 6 and the liquid diffusable sheet 7 is on the absorption main body part 10a side, the liquid can be effectively taken up. Therefore, it is preferable. Therefore, the planar arrangement in the wing part 5 is not limited to the arrangement in which the four strips are arranged at regular intervals as in the first and second embodiments, and any arrangement can be adopted. For example, as shown in FIG. 6, various shapes such as a shape in which the four indicators 6 and the liquid diffusive sheet 7 are curved on a parabola can be employed.

Hereinafter, the material of the members constituting the urine collecting pad of the first and second embodiments will be described.
(Liquid diffusion sheet)
Examples of the material for forming the liquid diffusable sheet 7 include ordinary hydrophilic sheets, specifically those containing hydrophilic fibers such as rayon, cotton, and pulp. The diffusion sheet preferably has a Klem water absorption height of 25 mm or more in the width direction from the viewpoint of quickly transmitting body fluid information to the wing part 5. Preferably, the thickness is 25 mm to 100 mm, particularly 35 mm to 80 mm, because body fluid information is quickly and accurately transmitted to the indicator. Examples of the method for controlling the diffusibility include (1) including hydrophilic particles and (2) including hydrophobic fibers in addition to the hydrophilic fibers constituting the sheet. Examples of the hydrophilic particles include silica, titanium oxide, aluminum oxide and the like, and titanium oxide is particularly preferable. In the case of adding hydrophobic fibers, hydrophilic fibers can be contained in an amount of 50% by mass or more, particularly 60% by mass or more, and hydrophobic fibers in an amount of less than 50% by mass, particularly less than 40% by mass. As the hydrophobic fiber, for example, fibers made of various thermoplastic resins can be used. The hydrophilic fibers (nonwoven fabrics) used in the present invention include fibers obtained by subjecting fibers made of a hydrophobic thermoplastic resin to various hydrophilic treatments, and nonwoven fabrics obtained by subjecting a nonwoven fabric made of hydrophobic fibers to various hydrophilization treatments. . Examples of the fiber sheet containing these fibers include spunlace nonwoven fabric, air-through nonwoven fabric, and paper. Specifically, a spunlace nonwoven fabric composed of rayon and polyolefin fibers can be mentioned. The basis weight of these fiber sheets is preferably 15 to 50 g / m ² , particularly preferably 18 to 35 g / m ² .

(Measurement method of the water absorption height of liquid diffusable sheet)
The measurement of the water absorption height of the clem showing the liquid diffusibility of the liquid diffusive sheet 72 can be performed in accordance with the paper and paperboard-water absorption test method-Klem method of JIS P8141. That is, after the liquid diffusive sheet is cut into a strip shape having a width of 20 mm and a length of 200 mm, the longitudinal direction is set to the vertical direction and the portion from the lower end to 15 mm is immersed in water. Measure how much mm was sucked up. This measured value is defined as the Klem water absorption height.

(indicator)
The color indicator contained in the hydrophilic composition constituting the indicator 6 preferably has a pH of 3 to 7 and changes its color. Examples thereof include bromophenol blue, methyl orange, alizarin S, bromocresol green, Examples include, but are not limited to, methyl red and bromocresol purple. Particularly preferred among these color indicators are bromophenol blue, bromocresol green, bromocresol purple, and the like. These color indicators are preferably 0.01 to 50% by mass, more preferably 0.01 to 40% by mass, and still more preferably 0% with respect to the total amount of the hydrophilic composition (acidic compound + color indicator). 0.01 to 1% by mass, most preferably 0.01 to 0.5% by mass. If the amount of the color indicator is less than 0.01% by mass, the color may be thin even if the color is changed and it may be difficult to visually recognize from the outside. If the amount exceeds 50% by mass, the color before the color change of the hydrophilic composition is dark. Since the appearance is not good and the cost may be further increased, it is preferably within the above range.

  In the present invention, from the viewpoint of avoiding discoloration other than a small amount of water or excreted urine under high temperature and high humidity, the hydrophilic composition described in Japanese Patent No. 3558828 is provided with a pH of the hydrophilic composition. An acidic compound that can be maintained and can be maintained such that the pH of the hydrophilic composition does not exceed 4 only by contact with water, and the back sheet portion 52 of the wing portion 5 includes A water-soluble compound that exhibits alkalinity when dissolved in water can also be contained. Moreover, the hydrophilic composition which makes the indicator 6 can also contain the hydrophilic polymer which has adhesiveness further. If the hot melt adhesiveness is imparted to the hydrophilic composition, the bonding and fixing of the front side sheet 51 of the wing part 5 and the liquid diffusable sheet 71 become stronger, and if there is a hot melt coating apparatus, Coating is possible on the top, and the processability is improved. That is, the hydrophilic composition containing the acidic compound, the color indicator, and the hydrophilic polymer functions as a hot melt adhesive. The hydrophilic composition may contain an antioxidant, an ultraviolet absorber and the like in addition to the components described above. These components are preferably contained in an amount of 0.5 to 5% by mass, more preferably 0.5 to 3% by mass, based on the total amount of the hydrophilic composition.

(Front sheet)
As a material of the front side sheet 51 of the wing part 5, it is preferable to use a water-repellent material from the viewpoint of liquid leakage prevention. Examples thereof include a sheet obtained by applying a hot melt adhesive on the surface of a water-repellent nonwoven fabric, a hydrophilic nonwoven fabric, paper, or the like to reduce the liquid permeability, and an olefin film (PE, PP). Further, from the viewpoint of visibility, a sheet (nonwoven fabric or film, or a composite thereof) in which the basis weight, bulk density, and void amount are controlled to such an extent that the color of the indicator can be visually recognized, or a sheet having high light transmittance ( For example, it is possible to use a highly transparent sheet or a sheet partially having holes.
When using a film as a forming material of the front side sheet 51 of the wing part 5, if a porous film having a basis weight of 10 to 40 g / m ² is used, the visual change of the changing agent can be easily recognized from the outside of the diaper and flexible. It is preferable because a feeling can be obtained. As the film material, for example, a transparent film can be used. The transparent film is, for example, a transparent film made of a thermoplastic resin such as polyethylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, or a composite film formed by bonding these transparent films, and includes a colorant. Those that are not can be used. Although this film material may be composed of only a highly transparent film, it is preferable to have a laminate structure in which a nonwoven fabric is disposed on the surface side sheet portion. Moreover, you may comprise only a water-repellent nonwoven fabric (in this case, preferably the water pressure-resistant pressure of 100 mm or more). When using a nonwoven fabric as a forming material of the front side sheet | seat 51 of the wing part 5, it is preferable to use the thing of the basic weight and / or thickness from which moderate light transmittance is acquired. The basis weight of the non-woven fabric is preferably 5 to 45 g / m ² , particularly 10 to 40 g / m ² , from the viewpoint of achieving both the recognizability of visual changes and the sensory performance such as texture and touch. Nonwoven fabrics include, for example, a single fiber of thermoplastic resin made of polyolefin such as polyethylene or polypropylene, or polyester such as polyethylene terephthalate, or a composite fiber having a core-sheath type or side-by-side structure using two or more of these resins. Non-woven fabric composed of Moreover, it is preferable to use a non-woven fabric having a high transparency of the ground color and a high whiteness, since the recognition of visual changes is enhanced. However, in the non-woven sheet, in the thickness direction of the wing portion 5, in the overlapping portion with the region where the indicator is arranged, most of the overlapping portion may be white, and in the region other than the overlapping portion, the visual indicator 6 You may print in the range which does not disturb the recognition property of a change.

(Measurement method of transparency of front side sheet 51 of wing part 5)
The index indicating the transparency of the front sheet 51 of the wing portion 5 can be represented by the numerical value of opacity as described above. This opacity is measured according to the method A or B of JIS P8138 using, for example, a spectral color difference meter (SE-2000, 6000, etc.) manufactured by Nippon Denshoku Industries Co., Ltd. and calculated by the following equation: Can do.
Opacity (%) C = (R ₀ / R _0.89 ) × 100
R ₀ : reflectance of the sample when using the backing black plate R _0.89 : reflectance of the sample when using the backing white plate

(Back sheet / Back sheet)
A material for forming the back sheet 52 and the back sheet 2 is not particularly limited as long as it is waterproof. In addition, it is preferable to have moisture permeability from the viewpoint of preventing stuffiness. For example, it is obtained by melt-kneading a hydrophobic thermoplastic resin and a fine inorganic filler made of calcium carbonate or the like or an incompatible organic polymer to form a film, and uniaxially or biaxially stretching the film. A porous film is mentioned. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination. Furthermore, it is preferable to employ an appropriate material for the back sheet 52 so as to improve the visibility of the indicator 6. For example, it is preferable that the basis weight of the sheet material and 15~70g / ^{m 2,} and even more preferably from 25 to 50 g / ^{m 2.} The color of the sheet material may be transparent or colored, but depending on the color of the article to be worn such as underwear (especially colored such as beige preferred by older women as the color of underwear) From the viewpoint of avoiding difficulty in visually recognizing the color (particularly, the color after discoloration), a light color system, particularly light gray or white is preferable. When the sheet material having such a color arrangement is adopted for the back side sheet portion 52, it is sufficient that the sheet material is disposed at least in a region overlapping with the indicator 6. In addition, in this embodiment, although the back side sheet | seat part 52 is a different member from the back surface sheet 2, the back side sheet 52 may be formed as a part which the back surface sheet 2 extended.

(Measurement of water pressure resistance)
Unless otherwise specified, the measurement of the water pressure resistance indicating the waterproof property of the back sheet 52 and the back sheet 2 is performed according to the waterproof test method for JIS L1092 textiles. The water resistance test (hydrostatic pressure method, method A) shown in JIS is mainly applied to non-breathable textile products. When applying to breathable products, the spray method is applied. To do. However, in the case of an absorbent article, it is unlikely that a liquid load is applied in the form of a spray assuming actual use, but rather it is considered to be in accordance with the conditions of the water resistance test.

(Measurement of moisture permeability)
Unless otherwise specified, the moisture permeability of the sheet material is measured according to the moisture permeability test method for JIS Z0208 moisture-proof packaging material at a temperature condition of 35 ° C.
Specifically, a moisture absorbent (calcium chloride) is first placed in a moisture permeable cup, a test piece cut to a diameter of 70 mm is placed on the mouth of the moisture permeable cup, the packing and ring are fixed with a wing nut, The joint between the wet cup and the sample is sealed with a vinyl adhesive tape to obtain a test specimen. This specimen is left in a constant temperature and humidity apparatus at 35 ± 2 ° C. and 90 ± 5% RH for a predetermined time. After 1 hour, remove the specimen, measure the mass, place it in the thermo-hygrostat again after measurement, take out the mass after 4 hours, measure the mass, and pass the moisture permeability through the sheet (per 1 m ² ) according to the following formula: It is determined as the mass (g) of water vapor. In addition, the preferable numerical range of the above-mentioned moisture permeability is shown as 1 g / 100 cm ² · h = 2400 g / m ² · 24 h.
Moisture permeability (g / m ² · 24h) = (240 × m) / (t · s)
s: Moisture permeable area (cm ² )
t: total time of last two weighing intervals tested (h)
m: Sum of the last two weighing intervals and increased masses tested (mg)

[Adhesive]
Moreover, although the adhesive 53 arrange | positioned by the non-skin side surface of the back side sheet | seat 52 can employ | adopt what is used for this kind of articles | goods, a suitable raw material is employ | adopted from a viewpoint of the visibility improvement of the indicator 6. FIG. be able to. For example, the color of the adhesive 53 is preferably lighter or more transparent than the color after the discoloration of the indicator 6. The light-colored pressure-sensitive adhesive 53 can be formed by applying a hot-melt pressure-sensitive adhesive or the like that forms a transparent film. Examples of the pressure-sensitive adhesive that forms the transparent pressure-sensitive adhesive 53 include styrene-butadiene-styrene (SBS), styrene-ethylene-butadiene-styrene (SEBS), and olefin hot melt. As for the application quantity of the adhesive in the adhesive 53, 10-70 g / m < ² > is preferable.

[Other materials]
As a forming material of the surface sheet 1, the side sheet 4, and the absorber 3, what is normally used for the absorbent article can be used.
The surface sheet 1 is preferably a hydrophilic non-woven fabric, and is a non-woven fabric called an air-through non-woven fabric, a point-bonded non-woven fabric, a spun-bonded non-woven fabric, a spunlace non-woven fabric or a three-dimensional shaped non-woven fabric. Fibers that have been hydrophilized with polyethylene composite fibers, polyethylene terephthalate and polyethylene composite fibers, and the like are preferred, and those having a basis weight of 15 to 50 g / m ² can be suitably used. Further, a hydrophilic perforated film or a hydrophilic nonwoven fabric may be partially overlapped on the crotch portion of the topsheet 1 on the non-skin surface side of the topsheet 1.
As the side sheet 4, a water-repellent nonwoven fabric is preferable, and specifically, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used. As the elastic member 42 for the three-dimensional gathers of the side sheet 4, a normal elastic member used for this type of article can be used. For example, as a material, synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, natural Examples include rubber, EVA, stretchable polyolefin, polyurethane, etc. The shape of the cross-section is rectangular, square, circular, polygonal or other thread-like or string-like (flat rubber, etc.), or multifilament type thread-like Can be used.

As a material for forming the absorbent body 3, those normally used for absorbent articles can be used. Specifically, for example, as the absorbent core, a fiber aggregate or a combination of this and a polymer water-absorbing polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used. The basis weight is not particularly ^limited, preferably ^{150g / m 2 ~500g / m 2} . Moreover, as a covering sheet which coat | covers an absorptive core, what consists of thin papers (thin paper), such as hydrophilic tissue paper, and hydrophilic nonwoven fabrics (composite nonwoven fabrics, such as SMS, SMMS, and SSMS) can be used.

  The case where the overhanging portion has a wing shape has been described as a specific embodiment. The wing-shaped overhanging part (wing part) is highly exposed to the outside of outer-wearing articles such as diapers, underwear, and pad holders, and has good visibility. It is preferable from the viewpoint of fixability to the outer worn article such as. On the other hand, in the present invention, the “overhang portion” is not limited to the wing shape, and may be, for example, one or a plurality of strip shapes protruding outward in the width direction from the absorption main body portion, or a plurality extending in the vertical direction. It may be a bowl shape. The “overhang” was made to be exposed to the outside of the absorbent main body located inside the outer wear article such as diapers, underwear and pad holders that are usually worn on the outside (non-skin side). A part is preferred. However, if the outer wear article is a so-called boxer brief type that extends around the leg to the wearer's thigh, the overhanging part can be folded back to the thigh contact part of the outer wear article Since the visual change of the indicator can be confirmed by rolling the leg opening of the outer wearing article, it is not necessary for the overhanging portion to be exposed to the outside of the outer wearing article. Moreover, although the overhang | projection part was distribute | arranged to the vertical direction center part in the crotch part C of an article in the said embodiment, you may be biased toward the stomach side part or back side part. Furthermore, the overhanging part may be provided on the ventral part F or the dorsal part R.

  The absorbent article of the present invention is not limited to the above-described embodiment, and may be a combination of the back sheet of Embodiment 1 and the liquid diffusion mechanism of Embodiments 2 and 3, and the liquid is from the absorber. As long as the indicator is changed via the liquid diffusion mechanism, the members used in Embodiments 2 and 3 may be appropriately replaced and combined. The absorbent article of the present invention is not limited to the urine collection pad in the above embodiment, but may be a deployable disposable diaper or a pants-type disposable diaper for infants or adults, and a sanitary napkin, panty liner or light incontinence. It may be a pad.

DESCRIPTION OF SYMBOLS 1 Top sheet 2 Back sheet 3 Absorbent body 4 Side sheet 5 Wing part 51 Front side sheet 52 Back side sheet 53 Adhesive 5t Wing base end position 6 Indicator 7 Liquid diffusable sheet | seat 10,20 Urine pad

Claims (5)

Absorption main body having a liquid-permeable top sheet disposed on the skin contact surface side, a waterproof back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between the two sheets An absorbent article comprising:
The absorbent article has a longitudinal direction in a direction connecting the abdominal side part and the back side part via the crotch part and a width direction intersecting the longitudinal direction, and the absorbent body part is on the inner side surface of the outer wearing article. It is used by placing it,
On both sides of the absorbent main body part, there is an overhanging part that can be folded back to the back sheet side that protrudes outward in the article width direction, and the overhanging part includes a liquid and a liquid-permeable sheet between two layers. It is configured so that the indicator part that changes color when in contact with the liquid diffusive sheet is in contact,
The liquid diffusive sheet is arranged so as to enter the inside of the absorption main body portion from the overhanging portion and reach the absorber between the absorber and the top sheet or between the absorber and the back sheet. Absorbent article.   The liquid diffusive sheet is composed of a plurality of strips arranged at intervals in the longitudinal direction of the article at least in a portion that has entered the inside of the absorbent main body, and the portion of the overhanging portion where the liquid diffusable sheet is not disposed is The absorbent article according to claim 1, wherein the two layers of hardly liquid-permeable sheets are brought into contact with each other and joined to form a hardly liquid-diffusible part. Wherein the projecting portion and the absorbent main body are joined by an adhesive, the absorbent article according to claim 1 or 2 wherein the basis weight of the adhesive is 0.1-5 g / m ^2.   A water repellent side sheet, which is a three-dimensional gathering member, is disposed on and joined to at least the crotch part of the absorbent article along the both sides in the longitudinal direction of the article. The absorbent article according to any one of claims 1 to 3, wherein the liquid diffusive sheet extends to the inner side in the width direction than the joint between the side sheet and the surface sheet.   The absorbent article can be used by being placed inside an outer-wearing article, and the overhanging portion is folded back toward the wearer's thigh to be easily worn externally. Absorbent article according to item.

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