JP5607417B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and more particularly 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 (for example, Patent Documents 1 to 3). In this case, the liquid which permeate | transmitted the thickness direction of the absorber leaks from the non-skin surface side of an absorber, and changes an indicator.
On the other hand, some urine-absorbing pads for adults, such as those placed on the outer side of an article to be worn on the diaper, such as a diaper absorbent body, underwear, or a dedicated pad holder, are provided with an indicator. On the other hand, a technique has been proposed in which a hole for facilitating the visual recognition of the indicator of the internal urine collecting pad is provided in the absorbent body of the diaper body covering the outside so that the discoloration of the indicator can be visually recognized (see 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

  By the way, in the absorptive article which has an indicator on the conventional back sheet side as mentioned above, the indicator does not change color until the liquid reaches the bottom of the absorber. That is, when the color changes, the absorber has already absorbed a considerable amount of liquid, and in some cases, the limit of the absorption holding capacity may be reached. In this case, there is not enough time from the color change of the indicator to the urine leakage, so if it is late to notice, the urine leakage has already occurred. Conversely, if there is urination in the absorber part just above the indicator, the indicator at that part will discolor early and it may be wondering if it should be replaced, even though there is still absorption capacity is there. 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, and it is unpreferable. On the other hand, if possible, the absorption capacity of the internal urine collection pad should be maintained without degrading the original absorption performance of the absorbent body and without removing the outer wear articles such as absorbent articles, underwear and dedicated pad holders. If the replacement time can be confirmed in a timely manner before the limit, or if it can be prevented from discoloring in a state where there is still an absorption capacity, 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. If you can detect urination at the right time without being too early or too late, and avoid subsequent changes such as changing clothes due to urine leakage, the physical and mental burden of users and caregivers will be reduced. sell.

  Therefore, the present invention is an absorbent article such as a urine pick-up pad that can be used by placing it inside an outer wearing article such as a diaper, underwear, pad holder, etc., and can timely know that there was urination, and The purpose is to provide an absorbent article that can be easily confirmed.

  The present invention relates to an absorbent 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 absorber interposed between the two sheets. An absorbent article comprising a main body part and having a longitudinal direction extending from the abdominal side part through the crotch part to the back side part and a width direction crossing the longitudinal direction, wherein the absorbent body is located at least on the skin side of the wearer It has a lower layer absorber positioned on the non-skin surface side of the absorber and the upper layer absorber, and a liquid diffusion mechanism for diffusing the liquid in the width direction is disposed or formed between both absorbers, and the absorbent article Is provided with an overhanging portion that projects outward in the width direction of the absorbent main body, and the overhanging portion provides an absorbent article in which a marker capable of detecting excretory fluid is disposed.

  The absorbent article of the present invention is an absorbent article such as a urine-absorbing pad that can be used by placing it inside an outer-wearing article such as a diaper, underwear, or pad holder, and it is timely known that urination has occurred. It has an excellent effect that it can be easily confirmed.

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 an expanded sectional view of the II-II line cross section of FIG. It is a disassembled perspective view which shows typically the poorly liquid-permeable sheet | seat which has the liquid diffusion mechanism in another urine pad as another embodiment (Embodiment 2) of this invention with an upper layer absorber and a lower layer absorber. It is a disassembled perspective view which shows typically the lower layer absorber which has a liquid diffusion mechanism in the urine collection pad as another embodiment (Embodiment 3) of this invention with an upper layer absorber. It is a figure which shows typically the modification of the lower layer absorber in the urine collection pad of Embodiment 3, (a) is the top view, (b) is the VV sectional drawing. It is a disassembled perspective view which shows typically the lower layer absorber which has a liquid diffusion mechanism in the urine collection pad as another embodiment (Embodiment 4) of this invention with an upper layer absorber. It is a disassembled perspective view which shows typically the lower layer absorber which has a liquid diffusion mechanism in the urine collection pad as another embodiment (Embodiment 5) of this invention with an upper layer absorber. It is the elements on larger scale which show typically the state where the crotch part of a lower layer absorber falls when the urine collection pad of Embodiment 5 is equipped. It is a top view which shows typically the state which expand | deployed and extended | stretched the urine collection pad as another embodiment (Embodiment 6) of this invention. It is a top view which shows typically the state which expand | deployed and extended | stretched the urine collection pad as another embodiment (Embodiment 7) of this invention. It is a top view which shows typically the state which expand | deployed and extended | stretched the urine collection pad as another embodiment (Embodiment 8) of this invention.

[Embodiment 1]
FIG. 1 is a partially cutaway perspective view schematically showing a state in which a urine collecting pad as an embodiment (Embodiment 1) in the absorbent article of the present invention is developed and slightly curved along the crotch. FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG.
The urine collection pad 10 of Embodiment 1 includes a liquid-permeable top sheet 1 disposed on the skin contact surface side, a waterproof back sheet 2 disposed on the non-skin contact surface side, and between the two sheets. It has the absorption main-body part 10a which comprises the interposing absorber 3, and the wing part 5. In the first embodiment, the wing part 5 constitutes an overhang part. 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 abdominal side F to the back side R via the crotch C is referred to as a vertical direction, and a direction intersecting (orthogonal) with the vertical direction is referred to as a width direction. 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 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 addition, what is necessary is just to arrange | position so that an absorber part may be located inside an outer wear article, when arranging the absorbent article of this invention inside an outer wear article.

  In the absorption main body 10 a of the first embodiment, the absorber 3 includes an upper layer absorber 31 and a lower layer absorber 32. The upper layer absorbent body 31 and the lower layer absorbent body 32 are rectangular having a shape substantially similar to that of the absorbent main body 10a. The upper layer absorber 31 and the lower layer absorber 32 are formed by covering an absorbent core (not shown) with a covering sheet (not shown). The upper layer absorber 31 is disposed on the skin surface side of the lower layer absorber 32 and absorbs and holds the excretion liquid from the surface sheet 1. On the other hand, the lower layer absorber 32 is positioned on the non-skin surface side of the upper layer absorber 31 and mainly absorbs and holds urine from the upper layer absorber 31 in an auxiliary manner. When the upper layer absorber 31 cannot absorb and hold the liquid, the lower layer absorber 32 absorbs and holds the leaked liquid and assists the upper layer absorber 31, which is effective in preventing side leakage. The lower layer absorber 32 of the first embodiment is thinner than the upper layer absorber 31. Although the details will be described later, the material may be the same as that of the upper-layer absorber 31 or may be a very thin sheet as long as it has sufficient absorption performance.

  In the first embodiment, a liquid diffusion sheet 4 as a liquid diffusion mechanism is interposed between the upper layer absorber 31 and the lower layer absorber 32 in the crotch C including the urination point p of the wearer. In addition, the urination point p shown in FIG. 1 is a position in the case of a male, and in the case of a female, it is a position closer to the center in the vertical direction. Here, the urination point p means a region where the wearer first receives urine when the wearer wears the urine collecting pad 10 and its periphery. The liquid diffusion sheet 4 of the first embodiment is directed to the wing part 5 arranged outward from the width direction edge of the upper layer absorber 31 and the lower layer absorber 32 and further outward from the width direction edge of the absorption main body 10a. It extends towards. Although details will be described later in the first embodiment, when the liquid reaches the non-skin surface side due to the absorption capacity being close to the limit in a part of the upper absorber 31 (for example, in the vicinity of the excretion point p), the liquid comes into contact therewith. The liquid diffusion sheet 4 diffuses a part of the liquid in the width direction and propagates it to an indicator 6 of the wing part 5 described later. As a result, the timing of urine leakage can be notified in a timely manner, and since the lower layer absorber 32 absorbs and retains urine thereafter, urine leakage prior to replacement of the urine collection pad can be prevented. The term “liquid diffusion mechanism” is used to include not only a liquid diffusion sheet made of a member independent of the liquid diffusion mechanism but also a part having a liquid diffusion function in a part of a predetermined member.

  In the absorption main body 10 a of the first embodiment, the top sheet 1 covers the skin surface side of the upper layer absorber 31 and is slightly wider than the upper layer absorber 31. Further, the pair of side sheets 7, 7 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 extend outward in the width direction left and right side edges of the absorbent body 3. The extending part of the side sheet 7 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. The side sheet 7 has a free edge that forms an orthostatic leak-proof cuff as a three-dimensional gather, and the elastic member 71 for the three-dimensional gather that is built in the free edge contracts in the longitudinal direction of the urine collecting pad in a worn state. Stand up so as to protrude toward the skin side of the wearer. Thereby, the said free end edge contact | abuts to skin firmly, the transfer to the exterior of excrement is interrupted, and a side leak is prevented effectively. It is preferable that the elastic member 71 for three-dimensional gathers is disposed at least on the crotch part C and further extends to the abdominal side F and / or the back side R side. As the bonding method, a normal method used for this type can be used. In addition, in the sectional views of FIG. 2 and the like, the three-dimensional gather is shown upright for the sake of understanding, but it is assumed that the three-dimensional gather is not upright in the extended and deployed state.

  In the urine collecting pad 10 of the first embodiment, the wing portion 5 is formed to extend outward from the edge in the left-right width direction in the vicinity of the crotch portion C of the absorbent main body portion 10a in plan view. Specifically, the wing part 5 forms a wing outer peripheral edge part 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 part 10a. . The wing part 5 of the first embodiment has a back side sheet part 52 in which the waterproof back sheet 2 extends in the width direction in the thickness direction, and the light transmittance laminated on the skin side of the back side sheet part 52. A high front sheet 51 is included. In the first embodiment, the front side sheet 51 enters inward beyond the wing base end position 5t in the plan view, and is joined between the side sheet 7 and the back sheet 2 (see FIG. 2). . A portion between the inner joint end k of the joint portion of the side sheet 7, the front sheet 51, and the back sheet 2 and the inner front end 6a of the marker (indicator) 6 is particularly referred to as a base portion e (see FIG. 2). Further, an adhesive 53 for fixing clothes is disposed on the non-skin surface side of the back sheet portion 52 (see FIG. 2). In addition, when the overhang | projection part of this invention is distribute | arranged so that the area | region extended in the width direction outward from the urination point p may be arranged, it is easy to obtain the visual change of a timely indicator.

  In the first embodiment, on the skin surface side of the back-side sheet portion 52, four strips are applied so that a marker material (indicator) 6 that detects excretion urine by visually changing with moisture extends in the width direction, A front side sheet 51 is joined so as to cover the indicator 6 from the skin surface side. The indicator 6 in this Embodiment 1 means what reacts to moisture, such as urination, and consists of a hydrophilic composition containing a color indicator whose color changes with changes 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. .

  In the first embodiment, the front side sheet 51 of the wing portion 5 has high light transmittance so that the visual change (color change, color disappearance, color appearance) of the indicator 6 can be visually recognized. As the light transmittance index, the opacity measured according to JIS P8138 is preferably 50% or less, more preferably 40% or less, and further preferably 30% or less. Moreover, it is preferable that the front side sheet | seat 51 is waterproof so that the liquid which changes the indicator 6 may not leak. In the first embodiment, the front side sheet 51 is configured to join one sheet material to the side sheet 7, but instead of this, a part of the sheet material such as the side sheet 7 constituting the absorption main body portion 10 a. May be extended to form the front sheet 51, and a process of partially reducing the opacity may be performed.

Here, with reference to FIG. 2, a process in which the indicator 6 causes a visual change will be described.
In the first embodiment, the urine collecting pad 10 in the unfolded state shown in FIG. 2 has the wing portion 5 directed inward in the article width direction along the wing base end position 5t or its peripheral position, and the back sheet 2 exists. It is bent in the direction and used by being fixed with an adhesive 53 so as to involve the crotch portion of the clothing as an outer-wearing article (not shown). In the wearing state of the urine pad 10, the front sheet 51 is reversed and disposed outside the clothing or the like. Thereby, the visual change of the indicator 6 can be recognized through the front side sheet | seat 51 of the wing part 5 and this from the outer side of clothes.
In the urine collecting pad 10 of the first embodiment, the liquid that has been transmitted from the topsheet 1 is absorbed and held by the upper-layer absorber 31 having pulp fibers and a superabsorbent polymer. When urine reaches the non-skin surface side of the upper absorbent body 31 in the case of a large amount of urination or multiple urinations, a part of the urine is diffused in the width direction by the liquid diffusion sheet 4 toward the wing part 5. At the same time, the remaining urine is absorbed by the lower layer absorber 32 to prevent leakage. In the first embodiment, the width direction ends 4a and 4a of the liquid diffusion sheet 4 are interposed between the front side sheet 51 and the back sheet 2 near the joining end k, and the liquid is located outside the joining end k in the width direction. Be led towards. The guided liquid further passes between the front side sheet 51 and the back side sheet part 52 of the wing part 5 to change the color of the indicator 6. The indicator 6 is preferably a hydrophilic composition containing a hydrophilic material to be described later, because the liquid is guided to the wing part 5 and discoloration can be observed in a timely manner.

In the first embodiment, even when the urine collecting pad 10 is worn, the replacement time can be easily determined by changing the color of the indicator 6 of the wing portion 5 located outside the clothing. Moreover, since the timing of the color change is a time when the lower layer absorber 32 can sufficiently absorb and hold the urine, the indicator 6 is changed in color before the urine leakage, so that the time for replacing the urine collecting pad is delayed. it can.
Usually, there are individual differences in the amount of urination and the number of urinations depending on the wearer. For example, when the amount of urination is large, the liquid may reach the bottom of the absorbent body with the single urination. If an indicator is provided between the back sheet and the absorber as in the past, when the urine reaches the non-skin surface side of the absorber near the excretion point, the absorber still has an absorption capacity At that time, the indicator may change color. In the first embodiment, since the indicator 6 is provided in the wing part 5, there is a distance from the urination part to the indicator, and the diffusion time in the width direction of the urine is saved, so this situation should be avoided. In addition, since the indicator 6 of the wing portion 5 is discolored before both the upper layer and lower layer absorbers reach the limit, leakage from the urine collecting pad can be prevented. As another example, when the amount of urination is small but the number of urination is large, or when the amount of urination is different each time, the indicator is gradually discolored several times. In this case, the user may forget to check the indicator after wearing for a long time, and the replacement timing may shift. In the conventional urine collection pad, there is a case where the absorption holding capacity becomes a limit at the time of discoloration of the indicator, and urine leakage may occur due to a shift in replacement timing. On the other hand, the urine collecting pad 10 according to the first embodiment can prevent leakage of urine even when the replacement timing is deviated because the lower layer absorber 32 can absorb and retain the liquid even after the indicator 6 of the wing portion 5 is discolored. .

  The urine collection pad 10 according to the first embodiment informs the replacement timing in a state where the absorption capacity of the upper layer absorber is close to the limit, and the lower layer absorber 32 firmly absorbs and holds the liquid and prevents leakage thereafter. Even if it is a pattern of urination, the urine collection pad can be replaced while reducing the risk of urine leakage even if it is slightly out of date. Further, in the urine collecting pad according to the first embodiment, it is not necessary to provide a hole for visual recognition in the absorbent body 3 and it is not necessary to deteriorate the absorbent performance of the absorbent body. In the urine collection pad 10 of the first embodiment, by providing the wing portions 5 and 5 including the adhesive 53, the crotch portion C including the wearer's excretion point p can be firmly fixed and displacement can be suppressed.

In the first embodiment, the base portion e is a portion for transferring the liquid from the liquid diffusion sheet 4. The width direction ends 4a and 4a of the liquid diffusion sheet 4 of Embodiment 1 are interposed between the front side sheet 51 and the back sheet 2 near the joining end k, but are not limited to such an arrangement and can be appropriately changed. It is. For example, if the liquid can be brought into contact with the indicator 6, the width direction end 4a of the liquid diffusion sheet 4 may stay inward from the joining end k, and conversely reaches the vicinity of the wing base end position 5t. But you can. Further, the liquid diffusion sheet 4 and the indicator 6 are not necessarily in contact with each other, and may or may not be in contact with each other.
In the first embodiment, the front side sheet 51 and the back sheet 2 constituting the base part e may or may not be bonded as long as the liquid can be delivered at that part. In the case where the front sheet 51 and the back sheet 2 are bonded, any adhesive structure that communicates the liquid guided by the liquid diffusion sheet 4 to the inside of the wing portion 5 may be used. For example, a method of applying a hot melt adhesive in a fiber shape, such as spiral coating or curtain spray coating, a method of applying a plurality of beads in the longitudinal direction of the wing portion, and the like can be employed. On the other hand, when providing a non-adhesive part, it is preferable to make only a part required for liquid delivery to the indicator 6 non-adhesive from a liquid-leakage-proof viewpoint. For example, a method is adopted in which a plurality of adhesive portions extending in the width direction in the base portion e are intermittently disposed in the vertical direction so that a non-joined portion sandwiched between the adhesive portions is a liquid delivery portion. be able to.

  In the first embodiment, the thickness 31v of the upper-layer absorber 31 and the thickness 32v of the lower-layer absorber 32 from the viewpoint of giving sufficient absorbency as an auxiliary absorber while suppressing the feeling of stiffness of the urine collecting pad 10 as a whole. The ratio 31v / 32v is 1/1 to 5/1, 31v + 32v is preferably 10 mm or less, more preferably 31v / 32v is 1/1 to 3/1, and 31v + 32v is 7 mm or less. This is particularly effective when the lower layer absorber 32 is formed using the same material as the upper layer absorber 31.

[Embodiment 2]
FIG. 3 is an exploded view schematically showing a liquid poorly permeable sheet 8 having a liquid diffusion mechanism in a urine collection pad as another embodiment (embodiment 2) of the present invention, together with an upper layer absorber 31 and a lower layer absorber 32. It is a perspective view, and shows each absorber in the state which coat | covered the absorptive core with the coating sheet (Hereafter, it is the same in Embodiment 3-5.). In FIG. 3, although shown slightly separated for understanding the structural relationship of the liquid-impermeable sheet 8, the upper-layer absorber 31, and the lower-layer absorber 32, the upper-layer absorber 31, the liquid The permeable sheet 8 and the lower layer absorber 32 are laminated in contact with each other in the thickness direction. In the second embodiment, the other members of the urine collection pad have the same configuration as in the first embodiment. Therefore, in FIG. 3, members other than the upper layer absorber 31, the liquid poorly permeable sheet 8, and the lower layer absorber 32 are omitted.

  In the second embodiment, the hardly liquid permeable sheet 8 is interposed between the upper layer absorber 31 and the lower layer absorber 32. The liquid poorly permeable sheet 8 covers the non-skin side surface of the upper layer absorber 31 and substantially coincides with the upper layer absorber 31 and the lower layer absorber 32 in a plan view. In the crotch part C of the liquid-impermeable sheet 8, a liquid-permeable region 81 is arranged on the skin surface side so as to extend in the width direction. The outer sides on both sides in the longitudinal direction of the liquid permeable region 81 are defined as liquid permeable regions 82 and 82. In the second embodiment, the poor liquid permeability means a property that hardly allows liquid to pass through, and includes waterproofness, water repellency, and liquid impermeability. The hardly liquid permeable region 82 suppresses diffusion of the liquid from the upper-layer absorber 31 in a wide range. On the other hand, easy liquid permeability refers to a property that allows liquid to easily permeate, and is relatively easy for liquid to permeate from a hardly liquid permeable region, including hydrophilicity and liquid permeability, but is preferably hydrophilic. . The liquid permeable region 81 functions as a liquid diffusion mechanism in the width direction while transmitting the liquid from the upper layer absorber 31 to the lower layer absorber 32. In the second embodiment, the method of forming the liquid easy-permeability region 81 in the liquid poor-permeability sheet 8 is particularly limited as long as the liquid easy-permeability region 81 is distinguished in a region so as to extend in the width direction. The method used for this type of article can be employed without any problem. For example, a method of forming a part of a water-repellent nonwoven fabric by hydrophilization, a method of pasting together hydrophilic materials, or a method of partially removing the liquid poorly permeable sheet 8 can be mentioned.

  Usually, immediately after urination, the excretion urine tends to reach the non-skin surface near the crotch C including the excretion point p of the upper absorbent body 31. The reached liquid moves to the easily liquid permeable region 81 of the hardly liquid permeable sheet 8 that comes into contact therewith. The liquid that has moved to the liquid easy-permeable region 81 diffuses in the width direction in which the region 81 extends while being transmitted to the lower layer absorber 32. In the diffusion of the liquid in the width direction, the hardly liquid permeable region 82 adjacent to the longitudinal front and rear side edges of the region 81 acts as a barrier region that prevents the liquid from spreading in the vertical direction. Therefore, in the hardly liquid permeable regions 82, 82, it is difficult for the liquid to move to the lower layer absorber 32 due to its property, and the liquid is allowed to pass through the lower layer absorber 32 through the liquid easily permeable region 81 and the width of the liquid is reduced. Spread in the direction. Accordingly, it is preferable to appropriately set the range of the liquid easy-permeability region 81 through which the liquid permeates, because the liquid absorption rate of the lower layer absorber 32 can be adjusted in relation to the diffusion rate in the liquid width direction. In FIG. 3, the liquid easily permeable region has a rectangular shape that is long in the width direction. However, even in a form that is long in the vertical direction in the central region in the width direction of the portion corresponding to the urination point p and relatively short in the vertical direction at the end in the width direction. good. For example, the central region has a circular or elliptical liquid easily permeable region having a major axis in the vertical direction, and the width direction has one or more belt-like liquid easy permeable regions penetrating the circle or ellipse. Such a form may be sufficient. In the second embodiment, the liquid diffused in the width direction along the liquid easy-permeability region 81 reaches the indicator of the overhang portion (wing portion), and a visual change occurs in the indicator 6.

  In the second embodiment, as in the first embodiment, the ratio 31v / 32v between the thickness 31v of the upper layer absorber 31 and the thickness 32v of the lower layer absorber 32 is 1/1 to 5/1, and 31v + 32v is 10 mm or less. It is preferable that 31v / 32v is 1/1 to 3/1 and 31v + 32v is 7 mm or less. This is particularly effective when the lower layer absorber 32 is formed using the same material as the upper layer absorber 31. In the second embodiment, the position of the inner tip 6a of the indicator 6 is preferably such that the distance from the joint end k is within 20 mm, particularly within 10 mm, further within 5 mm, and particularly within 2 mm.

[Embodiment 3]
FIG. 4 is an exploded perspective view schematically showing a lower layer absorbent body 321 having a liquid diffusion mechanism in a urine collecting pad as still another embodiment (embodiment 3) of the present invention together with the upper layer absorbent body 31. 4, in order to understand the structural relationship between the upper-layer absorber 31 and the lower-layer absorber 321, they are shown a little apart, but in an actual urine collection pad, the two absorbers are laminated in a state where they are in contact with each other in the thickness direction. ing. In the third embodiment, the other members of the urine collecting pad have the same configuration as in the first embodiment. Therefore, in FIG. 4, members other than the upper layer absorber 31 and the lower layer absorber 321 are omitted. FIG. 5 is a view schematically showing a modification of the lower layer absorbent body in the urine collection pad of Embodiment 3, wherein (a) is a plan view thereof and (b) is a VV sectional view thereof.
In the urine collection pad according to the third embodiment, the poorly liquid-permeable sheet 8 according to the second embodiment is not disposed, and the upper layer absorber 31 and the lower layer absorber 321 are directly laminated in the thickness direction. The skin surface side of the lower layer absorbent body 321 is liquid diffusive and liquid permeable so as to absorb and retain the liquid from the upper layer absorbent body 31. In the crotch part C on the skin surface side of the lower layer absorbent body 321, a water guide groove f ₁ as a liquid diffusion mechanism is formed in a single width direction. The water guide groove f ₁ is formed by being pressed from the skin surface side of the lower layer absorbent body 321, and the density is increased in this portion. How to crimp forming a conductor water groove f ₁ may be used a method used in this kind of article as appropriate, and a method of crimping by a roll. When water is sprayed on the absorber in the form of a mist, the water-absorbing polymer functions as an adhesive, so that a clearer groove is formed in the roll-bonded portion. In the case of using a synthetic fiber that has been subjected to hydrophilic treatment, a method of heat-bonding with a heated roll can be used. As described above, a capillary force is easily generated by increasing the fiber density, and the liquid is easily diffused in the width direction as compared with the uncompressed portion.

In the third embodiment, similar to the above-described embodiment, the liquid reaches the non-skin surface near the crotch portion C of the upper absorbent body 31 and leaks out. The reach the non-skin side of the surface of the upper layer absorbent body 31 of the liquid, the water guide groove f ₁ of the lower layer absorbent body 321 is arranged as saucer liquid. The liquid is guided to the water guide groove f ₁ having a high fiber density, is transmitted in the thickness direction, and is simultaneously diffused in the width direction along the water guide groove f ₁ . The liquid diffused in the width direction, shifted from the widthwise end of the water guide groove f ₁ in the width direction outwardly of the lower absorbent body 321, likewise, it is more widthwise outward portion of the liquid in the second embodiment described above The indicator 6 is touched and touched, and a visual change occurs in the indicator 6. In this embodiment 3, a good liquid diffusibility aspect, the width in the vertical direction of the water guide groove _{f 1} is preferably 10 to 50 mm, the depth of the grooves in the thickness direction of the water conducting grooves _{f 1} is 1mm~3mm is preferred.

(Modification of lower layer absorber in Embodiment 3)
In the third embodiment, the lower-layer absorbent body 321 described above is formed by supporting an absorbent polymer on pulp fibers or the like as in the first and second embodiments. Instead, the thin sheet shown in FIG. The lower-layer absorber 322 (hereinafter also referred to as an absorbent sheet 322) may be used. The absorbent sheet 322 has a so-called pulpress structure that does not include fibers such as pulp fibers. The absorbent sheet 322 includes a large number of absorbent polymers sandwiched between two liquid-permeable sheets. In a plan view of the absorbent sheet 322, four absorbent polymer existing regions m _{1 to} m ₄ and three non-existing regions n _{2 to} n ₄ that extend linearly in the longitudinal direction are alternately arranged in the width direction. The outer sides in the width direction of the existence areas m ₁ and m ₄ are sealed with the non-existence areas n ₁ and n ₅ . Furthermore absorbing absence regions n ₆ in the vertical position corresponding to the crotch portion C of the center of the sheet 322 is formed so as to extend in the width direction.

In the third embodiment, in the existing regions m _{1 to} m _{4 of the} absorbent sheet 322, the absorbent polymer q is fixed by the adhesive layers r ₁ and r ₂ applied to the inside of both sheets. In the non-existing regions n _{1 to} n ₆ , two liquid permeable sheets are bonded and fixed. Adhesion can be performed using an adhesion method used for this type of article. The non-existing regions n _{1 to} n ₆ are thinner than the existing regions m _{1 to} m ₄ because the absorbent polymer is not disposed. In particular, the non-existing regions n _{2 to} n ₄ and n ₆ function like grooves between the existing regions m _{1 to} m ₄ . In the third embodiment, the non-existing region n ₆ extending in the width direction corresponds to the water guide groove f ₁ of the lower layer absorber 321. The liquid leaking from the upper layer absorbent body 31 moves to the crotch portion C of the absorbent sheet 322, a portion of the liquid is received in the absence regions n ₆ located in the vicinity. In the non-existing region n ₆ , the liquid can be diffused in the extending width direction. On the other hand, a part of the liquid from the upper layer absorber 31 is diffused in the vertical direction in the non-existing region n ₃ near the crotch C and absorbed and retained by the absorbent polymer q in the surrounding existing regions m ₂ and m _3. . Further, a part of the liquid diffused in the width direction along the non-existing region n ₆ is diffused in the vertical direction in the non-existing regions n ₂ and n ₄ perpendicular to the non-existing region n _6, and the surrounding existing regions m _{1 to} m ₄ is absorbed and held by the absorbent polymer q inside. In the absorbent sheet 322, the liquid is absorbed and retained in a wide plane as described above, and uneven absorption can be suppressed.

In the third embodiment, the absorbent sheet 322 is preferable because it is a Pal press, so that the liquid can be prevented from returning and the absorbent polymer can be firmly absorbed and retained. Further, the absorbent sheet 322 is preferable because it is bulky and the thickness of the urine collecting pad is suppressed because the absorbent sheet 322 is not bulky. The lower layer absorber 322 is not limited to the third embodiment, and other embodiments can be obtained by appropriately changing the arrangement of the non-existing regions n _{1 to} n ₆ of the lower layer absorber 322. It can also be applied to. Further, not limited to one shall water guide groove f ₁ extending in the width direction, may be present plural rows in the crotch portion C.

[Embodiment 4]
FIG. 6 is an exploded perspective view schematically showing a lower layer absorbent body 323 having a liquid diffusion mechanism in a urine collecting pad as still another embodiment (embodiment 4) of the present invention together with the upper layer absorbent body 31. In FIG. 6, the structure is shown a little apart for the understanding of the structural relationship between the upper-layer absorber 31 and the lower-layer absorber 323, but in an actual urine collection pad, both absorbers are stacked in contact with each other in the thickness direction. ing. In the fourth embodiment, the other members of the urine collection pad have the same configuration as in the first embodiment. Therefore, in FIG. 6, members other than the upper layer absorber 31 and the lower layer absorber 323 are omitted.
In the urine collection pad of the fourth embodiment, the upper layer absorber 31 and the lower layer absorber 323 are directly laminated in the thickness direction. The skin surface side of the lower layer absorbent body 323 is liquid diffusible and liquid permeable so as to absorb and retain the liquid from the upper layer absorbent body 31. The crotch portion C of the skin surface side of the lower absorbent body 323, water guide region f ₂ is arranged as a liquid distribution mechanism for diffusing the liquid in the width direction. The water guide region f ₂ is formed by arranging two water-repellent regions g ₁ and g ₁ that have been subjected to a water-repellent treatment along the side edges in the vertical direction.

In the fourth embodiment, similarly to the above-described embodiment, the liquid that has reached the non-skin surface side of the upper absorbent body 31 moves to the vicinity of the crotch part C of the lower absorbent body 323 that is in contact therewith. Some of the migrated fluid is simultaneously attempt diffuse in the planar direction when it is transmitted in the thickness direction in the water guide region f _2. The liquid to be diffused is blocked by the water-repellent regions g ₁ and g ₁ and hardly spreads in the vertical direction, but diffuses in the width direction along the water guiding region f ₂ . Liquid diffused in the width direction is shifted from the widthwise end of the water guide region f ₂ in the width direction outwardly of the lower absorbent body 323, likewise, further widthwise outward portion of the liquid in the second embodiment described above The indicator 6 is touched and touched, and a visual change occurs in the indicator 6.

[Embodiment 5]
FIG. 7 is an exploded perspective view schematically showing a lower layer absorbent body 324 having a liquid diffusion mechanism in a urine collecting pad as still another embodiment (Embodiment 5) of the present invention, together with the upper layer absorbent body 31. In FIG. 7, the structure is shown a little apart for the understanding of the structural relationship between the upper-layer absorber 31 and the lower-layer absorber 324, but in an actual urine collection pad, both absorbers are stacked in contact with each other in the thickness direction. ing. In the fifth embodiment, the other members of the urine collection pad have the same configuration as in the first embodiment. Therefore, in FIG. 7, members other than the upper layer absorber 31 and the lower layer absorber 324 are omitted. FIG. 8 is a partially enlarged perspective view schematically showing a state in which the crotch part of the lower layer absorbent body 324 is curled when the urine collecting pad of Embodiment 5 is attached.

In the fifth embodiment, as in the third and fourth embodiments, the upper layer absorber 31 and the lower layer absorber 324 are directly laminated in the thickness direction. The skin surface side of the lower layer absorbent body 324 is liquid diffusible and liquid permeable so as to absorb and retain the liquid from the upper layer absorbent body 31. On the skin surface side of the lower layer absorbent body 324, compressed portions g ₂ and g ₂ extending in the vertical direction at the crotch portion C are disposed. In the fifth embodiment, when the urine collecting pad is attached, the crotch part C of the lower layer absorbent body 324 receives a compressive force w from the left and right inward in the width direction by the inner bases of the thighs of the wearer. The pressing parts g ₂ and g ₂ are deformed by the force from the outside in the width direction. Specifically, as shown in FIG. 8, the compressed portions g ₂ and g ₂ have their width direction outer edge portions j ₁ and j ₁ rolled inward, and the width direction inner edge portions j ₂ and j of the compressed portion. ₂ bulges toward the skin surface side together with the central region c ₁ of the crotch part C of the lower layer absorbent body 324. In this state, the downward slope toward the crotch width direction side end portion of the lower layer absorbent body 324 from the central region c ₁ through the inner edge j ₂ , j ₂ and the outer edge j ₁ , j ₁ of the pressing part. forming a, this series of shapes an inclined water conduit f ₃ as the liquid-diffusing mechanism. In the fifth embodiment, the compressed parts g ₂ and g ₂ are inclined conduits for diffusing the liquid in the longitudinal direction along the grooves and absorbing the liquid in the wide plane of the lower layer absorber 324 and diffusing the liquid in the width direction. responsible for part of the f _3. In the present embodiment 5, the arrangement of the compressing portion g _2, g ₂ is because they act to guide the liquid emerging leaking from the upper layer absorbent body 31 in the width direction outward, as in Embodiment 3 and 4 above The indicator 6 inside the wing part 5 can be discolored.

  In the third to fifth embodiments, as in the first embodiment, the ratio 31v / 32v between the thickness 31v of the upper layer absorber 31 and the thickness 32v of the lower layer absorber 32 is 1/1 to 5/1, and 31v + 32v is It is preferably 10 mm or less, more preferably 31 v / 32 v is 1/1 to 3/1, and 31 v + 32 v is 7 mm or less. This is particularly effective when the lower layer absorbers 321, 323 and 324 are formed using the same material as the upper layer absorber 31.

[Embodiments 6 to 8]
FIGS. 9-11 is a top view which shows typically the state which the urine collection pad as Embodiments 6-8 of this invention expand | deployed and expand | extended. In any of the figures, the outline is shown by a solid line and a speckled pattern is attached so that the shape and arrangement of the indicator 6 are clear. Moreover, in FIG. 9 to FIG. 11, illustration by a broken line (hidden line) is omitted in the outer shape of the surface sheet, and only the absorber 3 wrapped in this is shown by a broken line.
Each of the indicators shown in FIGS. 9 to 11 is an example in which a plurality of indicators are arranged in the width direction of the urine collecting pad, and it is preferable that liquid leakage is easily recognized in stages. These indicators can be appropriately applied to the urine collection pads of Embodiments 1 to 5.

Hereinafter, materials of members constituting the urine collecting pad of Embodiments 1 to 5 will be described.
[Absorber]
(Upper absorber)
As a material for forming the upper-layer absorbent body 31, those usually used for absorbent articles can be used. Specifically, for example, as the absorbent core, a fiber assembly or a combination of this and an absorbent 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} . As an absorptive polymer, various polymer materials usually used for this type of article can be used. The absorbent polymer is preferably a superabsorbent polymer compound having a performance capable of absorbing and retaining 20 times or more of its own weight of water or physiological saline. In addition, as a covering sheet for covering the absorbent core, thin paper (thin paper) such as hydrophilic tissue paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and synthetic resin fibers are subjected to a hydrophilization treatment. What consists of nonwoven fabrics (composite nonwoven fabrics, such as SMS, SMMS, and SSMS) can be used.

(Lower layer absorber 32, 321, 323, 324)
These lower layer absorbers may be absorbers using the same material as the upper layer absorber 31. Or as a lower layer absorber, the thin superabsorbent sheet containing a hydrophilic fiber, a heat-meltable adhesive fiber, a paper strength reinforcing agent, and a superabsorbent polymer may be sufficient. In this superabsorbent sheet, a superabsorbent polymer is dispersed on a fiber web, and a fiber assembly is overlaid thereon and dried to be integrated. The thickness is preferably as thin as 0.3 to 1.5 mm (see JP-A-8-246395). This superabsorbent sheet is obtained by dispersing and fixing a superabsorbent polymer three-dimensionally on fibers in an extremely thin sheet. Thereby, even when it absorbs repeatedly without dropping the superabsorbent polymer, gel blocking is unlikely to occur, and thus the liquid absorption retention performance is excellent. The thickness of the lower absorbent body 321 and the lower absorbent body 324, from the viewpoint of forming a water guide groove _{f 1} and compressing portion _{g 2,} preferably 2 to 5 mm, more preferably 2-4 mm.
(Lower layer absorber 322)
As a material for forming the lower layer absorber 322 shown as a modified example of each lower layer absorber, those described in JP-A-2004-275225 can be used.

[Liquid diffusion sheet]
Examples of the material for forming the liquid diffusion sheet 4 include ordinary hydrophilic sheets, specifically those containing hydrophilic fibers such as rayon, cotton, and pulp. 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 .

  The liquid diffusion performance of the liquid diffusion sheet 4 is indicated by the Klem water absorption height, and from the viewpoint of quickly and accurately propagating the liquid to the wing part 5, the Klem water absorption height in the width direction is preferably 25 mm or more, More preferably, it is 25 mm-100 mm, and it is still more preferable that it is 35 mm-80 mm. By disposing the liquid diffusion sheet 4 having excellent liquid diffusivity in this manner, an appropriate amount of liquid is accurately guided in the width direction, which is effective for 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 arranging a rectangular liquid diffusion sheet in the crotch part C in the vicinity of the excretion point.

(Measurement method of Krem absorption height of liquid diffusion sheet)
The measurement of the water absorption height of the Krem which shows the liquid diffusibility of the liquid diffusion sheet 4 can be performed in accordance with JIS P8141 paper and paperboard-water absorption test method-Krem method. That is, after the liquid diffusion 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 if sucked up. This measured value is defined as the Klem water absorption height.

  The liquid diffusion sheet 4 is not limited to be disposed within the range of the crotch C in the longitudinal direction, and may extend over the abdominal side F and / or the back side R. In any case, the liquid diffusion sheet 4 quickly guides the liquid leaking from the upper layer absorber 31 to the indicator 6 and, at the same time, prevents the liquid from diffusing and leaking more than necessary. It is preferable to have appropriate liquid permeability. Further, regarding the arrangement of the liquid diffusion sheet 4, from the viewpoint of accurate liquid diffusibility in the width direction and liquid leakage prevention property, the vertical end is a width of 50 mm before and after the vertical center line as a range in plan view. Is preferable, and a width of 30 mm is more preferable. From the viewpoint of reliably delivering the liquid in a state where the wing portion 5 is bent, the position of the inner tip 6a of the indicator 6 is preferably a distance from the joint end k (a distance of the base portion e) within 5 mm, preferably within 2 mm. Further preferred.

[Liquid permeable sheet]
The material for forming the liquid-impermeable sheet 8 is a sheet made by applying a hot melt adhesive on the surface of a water-repellent nonwoven fabric, a hydrophilic nonwoven fabric or paper to reduce the liquid permeability, an olefin film (PE, PP), etc. Is mentioned.
(Liquid permeability area)
As an index indicating the liquid diffusibility of the liquid permeable region 81 formed on the liquid permeable sheet 8, the Krem water absorption height is preferably 25 mm or more, more preferably 25 mm to 100 mm, and more preferably 35 mm to 35 mm. More preferably, it is 80 mm.
(Balance between liquid diffusibility and liquid permeability in the liquid permeable region 81)
From the viewpoint of coexistence of this liquid diffusibility and liquid permeability in a well-balanced manner, the liquid easy diffusion region is preferably present within a width range of 30 mm from the longitudinal center line to the front and rear sides, and within a width range of 10 mm. More preferably it is. Further, the width of the liquid diffusion region is preferably 3 to 50 mm, particularly preferably 5 to 30 mm, and more preferably 5 to 10 mm. By preventing this width from being exceeded, it is possible to prevent the permeation amount in the liquid thickness direction from being excessively larger than the diffusion amount in the width direction of the liquid, and before the liquid reaches the liquid easy permeable region end portion 81a. It is possible to prevent the absorption amount of the lower layer absorber from reaching the limit. In the case where a plurality of liquid diffusion regions are provided, it is preferable from the same viewpoint that the sum of the widths is within the above range.

[indicator]
The color indicator contained in the hydrophilic composition constituting the indicator is preferably one that changes its color at a pH of 3 to 7, and examples thereof include bromophenol blue, methyl orange, alizarin S, bromocresol green, methyl Examples thereof include red and bromocresol purple, but are not limited thereto. 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 an indicator can contain the hydrophilic polymer which has adhesiveness further. If the hydrophilic composition is imparted with hot-melt adhesiveness, the bonding and fixing of the front side sheet 51 and the back side sheet part 52 of the wing part 5 become stronger, and if there is a hot melt coating apparatus, It can be coated with, 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. In addition, in this invention, what applied to hydrophilic sheets, such as tissue paper and a hydrophilic nonwoven fabric, can also interpose an indicator other than the method of apply | coating to the back side sheet | seat part 52 directly.

[Front side sheet]
As a material for the front side sheet 51 of the wing part 5, a method of using 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 surface sheet It is possible to use a sheet having high light transmittance on the side (high transparency, partially having holes, etc.).
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, the non-woven fabric sheet may be white as long as the overlapping part with the area where the indicator is arranged in the thickness direction of the wing part 5, and the area other than the overlapping part does not hinder the recognition of the visual change of the indicator 6. You may print with

-The measuring method of the transparency of the front side sheet | seat 51 of the wing part 5 The index which shows the transparency of the front side sheet | seat 51 of the wing part 5 can be shown with the numerical value of an opacity as mentioned 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

(Adhesive)
Moreover, although the adhesive 53 arrange | positioned by the non-skin side surface of the back side sheet | seat part 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 an indicator. be able to. For example, it is preferable that the color of the adhesive 53 is lighter or more transparent than the color of the indicator after the color change. 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 becomes 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.

[Back sheet]
The material for forming the back sheet 2 is not particularly limited as long as it has waterproofness. 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, in the back surface sheet 2 or at least the back side sheet portion 52 which is an extended portion thereof, an appropriate material can be adopted so as to improve the visibility of the indicator. For example, the basis weight of the sheet material, it is preferable that the 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 that elderly women prefer as the color of underwear) From the viewpoint of avoiding difficulty in visually recognizing the color (particularly, the color after discoloration), it is preferable that the color is light, particularly light gray or white. When the sheet material having such a color arrangement is adopted for the back side sheet portion 52, it is sufficient that it is disposed at least in a region where the indicators overlap. In addition, in this embodiment, although the back side sheet | seat part 52 of the wing part 5 is formed as an extended part of the back surface sheet 2, it may replace with this and may consist of another sheet material.

(Preferable numerical range of waterproofness and moisture permeability)
The degree of waterproofness of the back sheet 2 and the back sheet 52 of the wing 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 above, 0.5 to 4.0 g / (100 cm ² · h) is preferable, and 1.0 to 2.5 g / (100 cm ² · h) is more preferable. Unless otherwise specified, the water pressure resistance is measured by a method according to the waterproof test method of JIS L1092, and the moisture permeability is determined according to the moisture permeability test method of JIS Z0208 moisture-proof packaging material at a temperature condition of 35 ° C. Measured by the method used.

[Other materials]
As a forming material of the surface sheet 1 and the side sheet 7, those normally used for absorbent articles 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 spun lace 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 7, a water-repellent nonwoven fabric is preferable. 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 71 for the three-dimensional gathers of the side sheet 7, 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.

  The case where the overhanging portion has a wing shape has been described as a specific embodiment. The wing-shaped overhanging part (wing part) has high visibility to the outside of outer wear articles such as diapers, underwear, pad holders, etc. It is preferable from the viewpoint of fixing to an outer worn article such as a pad holder. 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 portion” is preferably a portion that can be exposed to the outside with respect to the absorbent main body portion that is located inside the outer wear article such as a diaper or a pad holder that is usually used together. 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 | item in the said embodiment, you may be biased toward the stomach side part or back side part. Further, the overhang portion may be provided on the ventral side F or the back side R.

  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 Absorber 31 Upper layer absorber 32,321,322,323,324 Lower layer absorber 4 Liquid diffusion sheet 5 Overhang part (wing part)
6 Marking material (indicator)
7 Side sheet 8 Liquid poorly permeable sheet 81 Liquid easily permeable area 82 Liquid hardly permeable area 10 Urine collecting pad f ₁ water conveyance groove f ₂ water conveyance area f ₃ inclined water conduit

Claims (8)

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 main body having an absorbent body interposed between the two sheets. An absorbent article comprising a longitudinal direction extending from the ventral side part through the crotch part to the back side part and a width direction intersecting this,
The absorber has at least an upper layer absorber located on the wearer skin surface side and a lower layer absorber located on the non-skin surface side of the upper layer absorber,
A liquid diffusion mechanism for diffusing the liquid in the width direction is disposed or formed between both absorbers,
The absorbent article has a projecting portion that projects outward in the width direction of the absorbent main body, and the projecting portion is provided with a marker that can detect excretory fluid ,
The non-skin surface side of the upper absorbent body is covered with a liquid-impermeable sheet, and a liquid-permeable region serving as the liquid diffusion mechanism is arranged on a part of the skin surface side of the liquid-impermeable sheet. absorbent article it is. The absorbent article according to claim 1 , wherein the liquid permeability is hydrophilic . The absorbent article of claim 1, wherein said liquid diffusion mechanism is more formed member of the skin surface side of the lower absorbent body. The absorbent article according to any one of claims 1 to 3 , wherein the liquid diffusion mechanism is disposed at a position corresponding to a crotch part of the absorber. Wherein the projecting portion has members of the labeling agent a covering cormorants skin face side, the absorbent article according to any one of claims 1-4 opacity of the member is 50% or less. The absorptive article according to any one of claims 1 to 5 , wherein the marker is disposed so as to exist at a plurality of locations in a width direction in a plan view of the overhang portion. It is those the absorbent article can be used by being disposed inside the outer wearing article according to claim 1 to 6 any one of the external visible easily wear folded the projecting portion to the wearer's thigh side Absorbent article as described in 1. The absorbent article according to any one of claims 1 to 7 , wherein the labeling material of the overhanging portion is interposed between the sheet members constituting the overhanging portion.

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