JP2579954Y2 - Paper diapers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper exhibiting excellent urine diffusion and absorption.

[0002]

2. Description of the Related Art In such a disposable diaper, it is necessary to have a high urine absorbability in order to prevent skin irritation of a wearer.

For this purpose, Japanese Patent Application Laid-Open No. Sho 59-207150 discloses that a diffusion absorption groove is formed in the longitudinal direction and in the width direction of the absorber along the front-rear direction.

[0004]

However, in this publication, only urine once absorbed by the liquid-permeable sheet reaches the diffusion-absorbing groove because the absorbent and the non-woven liquid-permeable sheet are separated from each other. At this point, it diffuses in the longitudinal direction and is absorbed in the absorber. Therefore, there was no effect of diffusing and absorbing urine that would spread along the topsheet, and was inferior in diffusive absorption of urine as shown in the experimental examples described later.

[0005] Therefore, an object of the present invention is to provide a disposable diaper which is excellent in urine diffusion and absorption.

[0006]

The object of the present invention is to provide a disposable diaper in which an absorbent body is covered with a liquid-impermeable sheet and a liquid-permeable sheet, wherein the absorbent body is provided at least in a urine transmission region at a longitudinally intermediate portion. The middle in the width direction is a middle height with respect to the surface to be used, and the outside is lower than the middle and high portions, and the middle height of the absorber is determined from the outermost surface of one or more liquid-permeable sheets above the absorber. It penetrates into the surface of the part and is embossed along the front and rear direction, and in this embossed part,
Even in a state where the emboss is released since the all-liquid-permeable sheet and the absorber are integrated, the problem can be solved by forming the diffusion absorption groove in which the groove by the emboss is formed.

[0007]

[0008]

In the present invention, in the middle of the absorber in the longitudinal direction and the width direction, the outermost surface of one or more liquid-permeable sheets above the absorber is cut into the surface of the absorber,
Embossing along the front-rear direction was applied, and in this embossed portion, the liquid-permeable sheet and the absorber were integrated, and even in a state where the emboss was released, a diffusion absorption groove in which the embossed groove was formed was formed. Therefore, the urine that has passed through the liquid-permeable sheet and reached the diffusion-absorbing groove moves and disperses along the diffusion-absorbing groove and is absorbed by the absorber in the process. It is excellent in urine diffusion and absorption.

When the liquid-permeable sheet has not yet permeated, for example, when a large amount of urine has been locally discharged, the liquid-permeable sheet is diffused in the plane direction until the liquid-permeable sheet is transmitted. When the urine reaches the diffusion absorption groove, it moves in the groove along the longitudinal direction to the end. In the course of this movement, urine is absorbed by the absorber through the liquid-permeable sheet on the wall surface and bottom surface of the diffusion absorption groove. vice versa,
Once urine is absorbed by the absorber, if the concentration of urine is high around the diffusion absorption groove, the concentration gradient promotes the movement of urine to the diffusion absorption groove. In this way, urine is diffused and absorbed by the diffusion absorption groove.

In addition, since urine can directly enter the diffusion / absorption groove, the entered urine permeates into the absorber without overflowing. On the contrary,
In the case of the above publication, such an effect cannot be expected even if urination occurs in the absorption groove portion.

Furthermore, in the present invention, since the liquid-permeable sheet and the absorber are integrated, the movement of urine from the liquid-permeable sheet to the inside of the absorber is separated or simply brought into contact. In comparison with the case, the permeation speed into the absorber is much higher, and therefore, the permeation absorption is excellent.

On the other hand, in the urine transmission region at the longitudinal middle part of the absorber, the middle in the width direction is set to a middle height with respect to the use surface side, the outside is lower than the middle and high part, and the diffusion absorbing groove is provided in the middle and high part. It is effective to form

In order to increase the amount of urine absorbed, it is possible to cope with the problem by increasing the amount of the cotton-like pulp, usually the size of the disposable diaper. However, increasing the thickness of the cottony pulp increases its cost. Therefore, if the middle in the width direction is set to the middle height in a certain limited amount of cotton-like pulp, urination is usually performed directly in the middle portion in the width direction, so it is sufficient to increase the absorption amount or absorption speed in that portion. So a very reasonable design. In addition, by compressing the middle and high portions at the same time as embossing, the urine absorption speed in the middle and high portions can be increased. When a more compressed diffusion-absorbing groove is formed in the compressed middle and high part, the penetration rate of urine through the liquid-permeable sheet is increased, and the permeated urine is quickly permeated and absorbed by the middle and high absorbent part. Therefore, it becomes more excellent in urine diffusion and absorption.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings. 1 to 7 show a first embodiment. In the disposable diaper according to the present invention, a liquid-permeable sheet 1 made of polyethylene or the like and a single liquid-permeable sheet made of a nonwoven fabric or the like, As shown in the figure, between the two liquid-permeable first sheets 2A and the liquid-permeable second sheet 2B,
An absorbent body 3 made of cotton-like pulp or the like and having a certain rigidity, for example, a rectangular shape or preferably an hourglass shape as shown in the figure, a first absorbent body 31 and a second absorbent body 32 in this embodiment are interposed.

The absorber 3 in the embodiment has not a single layer but a two-layer structure. The lower second absorber 32 has an hourglass shape, whereas the upper first absorber 31 has the same width as the crotch of the second absorber 32 and has a rectangular shape. . The length of each absorber 31, 32 is the same. Further, as referred to by the cross-sectional shapes of the crotch portion and the front and rear end portions in FIGS. A polymer water absorbing agent 33 is provided between these absorbers 31 and 32.
Is applied and integrated on both contact surfaces.

The absorber 3 is made of an absorbent paper 3 for maintaining its shape.
4, it is possible, for example, to wrap in a cross-section in the form of a lip-groove-shaped frame with an upper opening in cross section. In FIG. 5, the reason why the frame is not a forehead is that the absorbent paper 34 is cut off by cutting the crotch portion.

The liquid impermeable sheet 1 extends outward from the periphery of the absorber 3 and has an hourglass shape. Liquid permeable sheet 2
Has a rectangular shape, extends slightly outward from the side edge of the absorber 3 in the leg area, and is fixed to the liquid impermeable sheet 1 with a hot melt adhesive or the like. The laterally extending portion of the liquid-impermeable sheet 1 constitutes a flap F together with a later-described barrier sheet 4 and side portions of the liquid-permeable sheet 2. The longitudinal edge of the liquid-permeable sheet 2 matches the paper diaper.

On both sides of the disposable diaper, leg-surrounding barrier cuffs B ₁ , B ₁ protruding toward the surface of use are formed. The barrier cuffs B ₁ are connected to the barrier sheet 4 substantially continuous in the width direction. It is constituted by one or a plurality of, for example, two elastic elastic members 5 around the leg as shown. Further, barrier cuffs B ₁ represents the barrier sheet 4
Has two proximal ends, an inner rising line 51 and an outer rising line 52, and one free distal end 60, which are formed by folding inward and constrained by the disposable diaper body. The elastic member 5 is arranged in the double part of the above, the outer rising line 52 is located on the flap F, and the inner rising line 51 is located inside the side edge of the absorber 3.

More specifically, the barrier sheet 4
Are fixed to the liquid-impermeable sheet 1 with, for example, four elastic elastic members 7 for gasket cuffs with a hot-melt adhesive (indicated by a cross in the drawing) or the like. The portion is fixed to the liquid-permeable sheet 2 at a position slightly inside the side edge of the absorber 3 with a seal line 20 around the leg with a hot melt adhesive or the like.

Further, the leg elastic elastic member 5 is fixed to the inner surface of the inner folding double barrier sheet 4 with a hot melt adhesive or the like. This fixing can be performed over the entire length or only at both ends of the elastic elastic member 5 for leg rotation in its extended state. In the latter case,
The middle is free.

The front and rear ends of the double portion of the barrier sheet 4 are formed such that the folded inner surface is directly bonded to the liquid-permeable sheet 2 with a barrier cuff B ₂ , which will be described later, by using a hot melt adhesive or the like. And fixed to the diaper main body. Therefore, the middle part in the longitudinal direction of the double part of the barrier sheet 4 excluding the constrained part is free, and when it becomes a boat shape in the front-rear direction at the time of wearing, due to the contraction force of the elastic elastic members 5, 5,
As shown in FIG. 7, it stands up. The upright, for leg-barrier cuffs B ₁ is generated.
6 is a fastening tape.

The barrier cuffs B ₁ , B ₁ abut around the wearer's legs, and the space surrounded by the barrier cuffs B ₁ , B ₁ and the liquid-permeable sheet 2 is a substantially trapezoidal space that is open upward. And form a confinement space for urine or loose stool. When urine is discharged into this space, the urine is absorbed into the absorber 3 through the liquid permeable sheet 1 and the barrier cuffs B ₁ , B ₁ (solid) of soft stool solids
Becomes a barrier, preventing overcoming. In the unlikely event that urine leaks laterally over the rising edge of the barrier cuffs B ₁ , B ₁ , lateral leakage is prevented by the gasket cuffs by the elastic elastic members 7. Further, in the present invention, loose stools as shown by the arrow in FIG. 7, when going to the inner surface of the barrier cuff B ₁ moves transversely relative to the loose passage, always absorber is present thereunder Therefore, the moisture in the loose stool is permeated and absorbed into the absorber through the liquid-permeable sheet as shown by the dashed arrow. Therefore, after a certain period of time, the moisture in the loose stool decreases and the solid content increases, so that the fluid loses its fluidity and does not return to the center side of the disposable diaper, thereby preventing skin irritation and the like.

As shown in FIG. 7, the barrier cuffs B ₁ in the embodiment are in the upright state when the barrier sheet 4 is in the upright position.
In the front and rear ends of the double part, the folded inner surface is fixed to the upper surface of the liquid-permeable sheet 2 with a hot melt adhesive or the like and is restrained with respect to the disposable diaper main body. ₁ outer wall B ₁₁ and inner wall B
₁₂ stands up inclining inward, does not warp outward when worn, and has good barrier properties.

As shown in FIG. 7, the side edge of the liquid-permeable sheet 2 is slightly inward from the fixing portion between the liquid-impermeable sheet 1 and the barrier sheet 4 near the outer rising line 52. The lower surface is fixed to the liquid-impermeable sheet 1.

The barrier cuffs B from the outer wall B ₁₁ of the barrier cuffs B ₁ to the outer upright line 52 as a boundary extending outwardly
₁ (or the barrier sheet 4) are mutually fixed to the liquid impermeable sheet 1 with a hot melt adhesive while elastic elastic members 7,.

In the disposable diaper thus configured, in addition to the effect of preventing the barrier cuff from curling outward, first, the side surface of the absorber 3 is wrapped by the liquid-permeable sheet 2. Secondly, when the urine absorbed in the liquid-permeable sheet 2 diffuses in the width direction, the liquid-permeable sheet 2 has a wide width, so that the diffusion-absorbing ability is enhanced. urine flowing out of the absorbent body 3 to a 3, is absorbed by the liquid pervious sheet 2 extending to beneath the raised portions of the barrier cuffs B _1, the longitudinal direction of the diffusion is prevented, preventing longitudinal leakage, since the 4 to the side edge of the liquid-permeable sheet 2 does not extend from the outer upright line 52 of the barrier cuff B ₁ outwardly, preventing further urine does not diffuse laterally, the lateral leakage into the urine with There are effects such as being able to do.

By the way, the barrier cuff B ₁ may be formed by a single sheet. However, in this case, barrier cuffs B ₁ is become fluent, shape retention is poor. Furthermore, even if the barrier sheet 4 is formed of a water-repellent material, there is a high risk that urine will permeate or seep outward. Therefore, in order to solve these problems, it is desirable to use a double cuff as shown in the above-described embodiment.

On the other hand, in the embodiment, further the front and rear ends of the disposable diaper, having at least the rear end portion, a waist-surrounding elastic stretch band 8 and the waist-surrounding barrier cuffs B _2. The elastic band 8 for the waist can be, for example, a urethane foam band, which can be fixed between the liquid-impermeable sheet 1 and the liquid-permeable sheet 2 with a hot melt adhesive or the like. it can.

The waist-surrounding barrier cuffs B ₂ are are preferably disposed along the non-woven sheet of water-repellent in the width direction of the diapers, to secure the front and rear direction end portion by the hot melt adhesive. The fixing sites are inward sealing line 53 defining the standing line of barrier cuffs B ₂ as long as above the absorbent body 3, can either be applied in a solid to the edge, it is intermittently applied in the longitudinal direction You can also. Inner seal line 53
The inner part is a free part. However, in the embodiment, the barrier cuff B ₁ for leg-inner upright lines 51, 51
Since it is longer than the width between them, it extends in the width direction beyond the inner standing line 51. In this extending portion, even if an attempt is an inner upright lines 51 by applying a hot melt adhesive superimposed barrier cuff B ₁ for around legs on the surface of the free portion of the waist-surrounding barrier cuffs B _2, in this state the barrier Cufflink B
To only be fixed to the _second free portion, with resulting in fluent that part, when it enters the urine or loose passage, so would penetrate at once leg for the barrier cuffs B _1, a hot melt adhesive it is desirable to fix the partition sealing line 54 the ends of the free portion of the waist-surrounding barrier cuffs B ₂ with respect to the liquid-permeable sheet 2 by.

The free portion of the waist-surrounding barrier cuffs B _2, as shown in FIG. 7, so that standing obliquely inwardly in use. This standing force, by 2's power of contractile force and contractile force of the Ashimawari for barrier cuff B ₁ of resilient and elastic members 5 for the waist-surrounding elastic stretching band 8. That is, when the contractile force of the resilient and elastic members 5 of the barrier cuff B ₁ for leg-acts, the entire disposable diaper is curved in a boat in the longitudinal direction. In addition, even if the waist circumference is stretched in the use state by the contraction force of the waist elastic band 8, the front and rear ends of the disposable diaper are in a contracted state when compared with the product manufacturing stage. Curves in the width direction.
These curved space is formed between the absorber 3 and liquid-permeable sheet 2 and the waist-surrounding barrier cuff B ₂ of the free portion, in the results in use, for around waist barrier cuff B ₂ The free part stands diagonally.

[0031] As a result, as in the case of barrier cuffs B ₁ for around legs, it is possible to dam the urine and soft feces. In particular, in order inner seal line 53 is located above the absorbent body 3, as shown by the arrow in FIG. 7, the moisture of loose stools that enters under the free portion of the waist-surrounding barrier cuffs B ₂ promptly liquid permeation Through the absorbent sheet 2 and into the absorber 3.

[0032] The above example is a waist-surrounding barrier cuffs B ₂ are disposed on the inner surface of the barrier cuff B ₁ for around legs,
It may be disposed on the top surface of the barrier cuff B ₁ for around legs. However, the embodiment described above is more preferable in terms of design and the like. Moreover, a barrier for waist cuffs B ₂ is the protruding end of the barrier cuff B ₁ for around legs (distal end)
It is sufficient if the length is longer than the width between the two, and it is not always necessary to extend in the width direction beyond the inner standing line 51. However, in this case, it is necessary to extend the inner seal line 53 at least to the inner standing line 51. Furthermore, in this case, a part of the free portion of the waist-surrounding barrier cuffs B ₂ can be fixed to the inner surface of the upright portion of the barrier cuff B ₁ for around legs.

In the present invention, the barrier sheet forming each barrier cuff is preferable because it is impermeable and not liquid-permeable. Further, the liquid-permeable sheet may be made water-repellent by silicon treatment or the like. Further, in the above-described embodiment, the skirt of the leg-surrounding barrier sheet 4 is fixed to the liquid-impermeable sheet 1, but the liquid-permeable sheet 1 is extended to the side edge of the disposable diaper or to the vicinity thereof, and the liquid-permeable sheet 1 is provided. It can also be fixed to the conductive sheet 1.

Reference numeral 9 denotes a shape-preserving elastic expansion / contraction member used for forming the absorber 3 into a boat shape. When the elastic expansion / contraction member 9 is provided, the absorber 3 having a certain degree of rigidity can be used in a disposable diaper. And can be held in a shape that fits the body of the wearer. In this case, in order for the contracting force of the elastic expandable member 9 to act on the absorber 3, it is important that the elastic expandable member 9 is close to the side surface of the absorber 3; in accordance with an embodiment of the invention, a structure for fixing against liquid-impermeable sheet 1 liquid-pervious sheet 2 in the portion below the barrier cuff B ₁ is, in close proximity to the resilient and elastic members 9 on the side surface of the absorbent body 3 fixed It is effective to do.

By the way, barrier cuffs are formed on both sides of a disposable diaper so as to particularly prevent loose leakage of loose stools. Japanese Unexamined Patent Publication No. 62-250201 discloses that one barrier sheet is fixed to a flap portion. And a proximal end, and a structure in which an elastic elastic member is provided at a free distal end, and as a modification thereof, a top sheet is extended, folded in the middle of a flap portion and raised to form a barrier cuff, Also disclosed is a structure in which a side edge of the folded portion is a distal end and an upright portion is a proximal end. On the other hand, Japanese Patent Application Laid-Open No. 63-182402 discloses that a barrier cuff is formed around the waist in order to further prevent the front-rear leakage by further developing the above publication. In such a disposable diaper described in the above-mentioned publications, an absorbent pocket is formed by positioning the proximal ends of the barrier cuffs around the legs and the waist on the outer flaps of the side edges of the absorber. It is desirable to guide loose stool to the stool and keep it. However, at first glance, it is considered that the presence of the absorption pocket is effective, but when actually using a disposable diaper having that structure, although there is a damping effect of loose stool, the loose stool that has entered the absorption pocket is as described above. As in the embodiment, since there is no absorber below the absorbing pocket, moisture does not sufficiently penetrate into the absorbing body, stays in the absorbing pocket for a long time with loose stool, and depending on the movement of the wearer, Loose stool may flow back to the center side of the disposable diaper, causing the wearer's skin to be rough or uncomfortable.

Therefore, as in the above-described embodiment, it is desirable that the rising lines of the barrier cuffs around the legs and the waist are located above the absorber 3 respectively. If the absorbent 3 is always present below the soft stool that has entered between the absorbent body 3, specifically the liquid-permeable sheet 2 and the inner surface side of the barrier cuff, the moisture in the soft stool will be reduced by the liquid-permeable sheet. It is penetrated and absorbed into the absorber 3 through 2. Therefore, after a certain period of time, the moisture in the loose stool decreases and the solid content increases, so that the fluid loses its fluidity and does not return to the center side of the disposable diaper, thereby preventing skin irritation and the like. In addition, when the user replaces the disposable diaper, the inconvenience caused by the loose stool remains free.

In the present invention, as shown in FIGS. 1, 2, 4 and 6, preferably, the absorbent body 3 has at least a middle portion in the longitudinal direction and a middle portion in the width direction of the urine-transmitting region. And the middle part is lower than the middle part. In the first embodiment, both the first absorber 31 and the second absorber 32 have a middle height. The width of the convex portion, the barrier cuffs B _1, B ₁ standing line 51,5
It is between one and one. In the embodiment, the middle and high part width of the second absorber 32 is slightly wider than the middle and high part width of the first absorber 31.

Further, one sheet above the first absorber 31 or a plurality of sheets as in the embodiment, that is, from the outermost surfaces of the liquid-permeable first sheet 2A and the liquid-permeable second sheet 2B, the first absorber 31 The first and second liquid-permeable sheets 2A and 2B and the first absorber 31 are integrated with each other by embossing along the front-rear direction by penetrating into the surface of the middle and high parts. As shown in FIG. 6, even when the emboss is released, a diffusion absorption groove G whose groove is not restored by the emboss is formed.

In forming the embossing or diffusion absorbing groove G, as shown by a virtual line in FIG. 7, for example, an embossing roll R wider than the width of the absorber 3 having the embossing fin f having a trapezoidal cross section is used. It can be formed by compressing the entire absorber 3. By this compression, as shown in FIG. 6, the first absorber 31 and the second absorber 32
However, in particular, the middle and high portions thereof are compressed, and the diffusion absorption grooves G are formed by the embossed fins f.

In the disposable diaper thus configured,
Urine that has passed through the liquid-permeable sheets 2A and 2B and reached the diffusion absorption groove G moves and disperses along the diffusion absorption groove G and is absorbed by the absorber 31 in the process, so that the groove G is formed. Excellent in urine diffusion and absorption compared to when not. Also,
If the liquid-permeable sheets 2A, 2B have not yet passed through, for example, if a large amount of urine has been locally detected, the liquid-permeable sheets 2A, 2B are not allowed to pass through the liquid-permeable sheets 2A, 2B. When the urine diffused in the surface direction reaches the diffusion absorption groove G, it moves in the groove G to the end along the longitudinal direction. In the course of this movement, urine becomes diffused and absorbed
Is absorbed by the absorber 31 through the liquid-permeable sheets 2A and 2B on the wall surface and the bottom surface. Conversely, once the urine is absorbed by the absorber 31, if the concentration of the urine is high around the diffusion absorption groove G, the concentration gradient promotes the movement of the urine to the diffusion absorption groove G. In this way, urine is diffused and absorbed by the diffusion absorption groove G.

Moreover, since urine can directly enter the diffusion absorption groove G, the entered urine permeates the absorbers 31 and 32 without overflowing. On the other hand, in the case of the above-mentioned JP-A-59-207150, such an effect cannot be expected even if urination occurs in the absorption groove portion.

Further, in the present invention, the totally permeable sheet and the absorber are integrated. As the integration means, when the liquid-permeable first and second sheets 2A and 2B are heat-fusible such as a polypropylene nonwoven fabric, or the first absorbent body 31 contains a heat-fusible material such as polyethylene. In this case, at least the embossed fins f can be heated and integrated by heat sealing. It is desirable that the integration be performed not only on the diffusion absorption groove G but also on at least the entire exposed surface area for urine absorption of the liquid-permeable first and second sheets 2A and 2B and the first absorber 31. Further, preferably, the first absorber 31 and the second absorber 32 are also integrated.
Such compression and integration increases the overall strength of the absorber,
It also improves its shape retention. As an integrating means, bonding with a hot melt adhesive (the coating amount is preferably 7 g / m ² or less by spiral coating or the like so as not to impair absorption) may be used. First absorber 31, and second
Desirably, a water-soluble binder may be mixed into the absorber 32 for joining.

As described above, the liquid permeable sheet and the absorber are
In the embodiment, at least the liquid-permeable first and second sheets 2
Since A, 2B and the first absorber 31 are integrated,
The urine moves from the liquid-permeable sheet into the absorber at a much faster rate of penetration into the absorber than in the case where the urine is separated or simply in contact with the urine.

Further, since the diffusion absorbing groove G is bent along the diffusion absorbing groove G, that is, along the line in the width direction, the fitting property to the crotch part at the time of wearing and after wearing is good. Become. By the improvement of the fitting property, the lateral displacement and the longitudinal displacement of the absorber can be suppressed, and the reduction of the absorption area due to the displacement can be prevented.

The diffusion absorption groove G in the above embodiment is simply an elongated groove. However, as shown in FIG. 8, for example, as shown in FIG. A urine pool g can also be formed. A plurality of diffusion absorption grooves G may be formed in parallel with the longitudinal direction.

The position where the diffusion absorption groove G is formed is preferably on the front side, although there are differences between boys and girls. Dimensionally, L = 70-200 mm, W
= 1-6mm, Fr = 70-150mm, Ba = 140-250mm,
Fr / Ba = 0.4-0.7, depth 0.5 mm or more, particularly preferably 1 mm or more.

As the liquid-permeable first sheet, for example, a polypropylene-based nonwoven fabric having a hydrophilicity of preferably 18 to 25 g / m ² is used, and as the liquid-permeable second sheet, the same nonwoven fabric or a nonwoven fabric is preferably used. Can be a tissue paper having a basis weight of 15 to 30 g / m ² . As described above, the liquid-permeable sheet is made of 1
It may be a layer or three or more layers.

It is preferable that the above-mentioned polymer water-absorbing agent is not applied to a portion corresponding to the diffusion absorption groove in order to prevent the diffusion absorption groove from flattening or collapsing due to swelling due to urine absorption. .

Another example of the structure of the absorber 3 is shown in FIG. FIGS. 9 to 12 show a second embodiment, in which the height of the first absorber 31 is a part without extending over the entire length.
This is an example in which the middle and high portions are not formed in the second absorber 32. FIGS. 13 to 16 show a third embodiment.
In this example, the height of the absorber 31 is a part without extending over the entire length, the bird has a shape in which the bird has open wings, and the second absorber 32 has no middle-high portion. FIG.
FIG. 20 to FIG. 20 show a third embodiment, in which the first absorber 31 is used.
The middle and high schools are part of the entire length,
This is an example in which a bird has a wing-opened shape, and the second absorber 32 has no middle-high portion and a narrow portion.

The present invention can be naturally applied to a disposable diaper having no barrier cuff. It is not essential to form the middle and high parts in the absorber.

(Experimental Example) The absorption and absorption properties of urine were examined using the absorbers shown in FIGS. In this case, the case where only the side wall and the bottom wall of the diffusion absorption groove are integrated with the first absorber by thermal melting (first experimental example)
And a case where the area of 50 mm × 50 was integrated by thermal melting (second experimental example). Also, as a comparison,
In the case where the diffusion absorption groove is not formed (first comparative example), and in the case where the diffusion absorption groove having the same cross-sectional shape is formed in the absorber, the liquid permeable sheet does not diffuse as described in JP-A-59-207150. In the case of being flush with the absorption groove (second
Comparative Example) was also examined. The results are shown in the first comparative example and the second comparative example.
It was found that the comparative example, the first example, and the second example had good urinary diffusive absorbency in this order.

[0052]

As described above, according to the present invention, a product excellent in urine diffusion and absorption can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view of a deployed state of a paper diaper according to a first embodiment of the present invention.

FIG. 2 is a plan view of a first absorber (absorber for an upper layer).

FIG. 3 is a plan view of a second absorber (absorber for lower layer).

FIG. 4 is a view taken along line 4-4 in FIG. 1;

FIG. 5 is a view taken along line 5-5 in FIG. 1;

FIG. 6 is a perspective view of a main part along line 4-4 in FIG. 1;

FIG. 7 is a perspective view of a main part of the first embodiment.

FIG. 8 is a plan view of a main part of another example of the diffusion absorption groove.

FIG. 9 is a plan view of a first absorber (absorber for an upper layer) of a second embodiment.

FIG. 10 is a plan view of the second absorber (absorber for lower layer).

11 is a transverse sectional view of a portion corresponding to line 4-4 in FIG. 1;

FIG. 12 is a cross-sectional view of a portion corresponding to line 5-5 in FIG. 1;

FIG. 13 is a plan view of a first absorber (absorber for an upper layer) of a third embodiment.

FIG. 14 is a plan view of the second absorber (absorber for lower layer).

FIG. 15 is a cross-sectional view of a portion corresponding to line 4-4 in FIG. 1;

FIG. 16 is a transverse sectional view of a portion corresponding to line 5-5 in FIG. 1;

FIG. 17 is a plan view of a first absorber (absorber for an upper layer) of a fourth embodiment.

FIG. 18 is a plan view of the second absorber (absorber for lower layer).

19 is a transverse sectional view of a portion corresponding to line 4-4 in FIG. 1;

FIG. 20 is a transverse sectional view of a portion corresponding to line 5-5 in FIG. 1;

[Explanation of symbols]

1: liquid-impermeable sheet, 2A: liquid-permeable first sheet, 2B ...
Liquid-permeable second sheet, 3 ... absorbent, 4 ... barrier sheet,
5 elastic resilient member, 31 first absorber, 32 second absorber, 33 water-absorbing agent, 34 absorbent paper, B ₁ barrier cuff for leg circumference, B ₂ barrier cuff for waist circumference, G
... Diffusion absorption groove, g ... Urine pool, R ... Emboss roll,
f: Embossed fin.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-207150 (JP, A) JP-A-56-4701 (JP, A) JP-A-64-49555 (JP, A) JP-A-59-207 112003 (JP, A) JP-A-2-60645 (JP, A) JP-A 63-27405 (JP, U) JP-A 63-27406 (JP, U) JP-A 62-6817 (JP, U) Japanese Utility Model Showa 61-78810 (JP, U) Japanese Utility Model Showa 55-72928 (JP, U) Japanese Utility Model Showa 47-36733 (JP, U) Japanese Utility Model Showa 55-127711 (JP, U) Japanese Utility Model Showa 53-340 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) A61F 5 / 44,13 / 15,13 / 46-13/52

Claims (1)

(57) [Scope of request for utility model registration] 1. A disposable diaper in which an absorbent body is covered with a liquid-impermeable sheet and a liquid-permeable sheet, wherein the absorbent body is located at least in the urine transmission region in the middle portion in the longitudinal direction, and the middle in the width direction is closer to the use surface side. On the other hand,
The outer side is lower than the middle and high portions, and furthermore, the outermost surface of one or more liquid-permeable sheets above the absorber penetrates into the surface of the middle and high portions of the absorber to be embossed along the front-rear direction. In the embossed portion, the liquid-permeable sheet and the absorber are integrated, and even when the emboss is released, the diffusion absorption groove in which the embossed groove is formed is formed. Characterized disposable diapers.