JPH0819572A - Paper diaper - Google Patents

Abstract

PURPOSE: To make a urine absorption area to the minimum and improve fitting feeling, by providing an upheaval part with prescribed length and height at a point to wrap in a local range of a fluff pulp laminated body which is integrally connected to fluff pulp in the lower and side parts of skin and the fluff pulp of which is not entangled and tied. CONSTITUTION: This paper diaper 2 is formed of a first fluff pulp laminated body 4, a perforated partition layer 6 thereunder to make urine sucked and settled in the laminated body 4 be fallen down without passing through, a skin 8 to guide and diffuse falling urine in width and length directions, and an integrally continued second fluff pulp laminated body 10. The paper diaper also has plural ditches 12 and prescribed height and is provided with an upheaval part 14 with prescribed length in parallel with the longitudinal direction. A depressed part 28 is formed in the upheaval part 14 and has a point part 30 protruded from the lower part of the paper diaper main body and edge parts 22-1, 32-1 thereof are extended in the longitudinal direction into almost a ship shape with the rear end part in an opened condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper, and in particular, it is mainly made of pulp cotton, and a first pulp cotton laminate of a raised portion provided at a central portion sucks urine and drops it, and a second pulp cotton laminate. In the perforated partition layer formed in the cortex of the body,
The present invention relates to a disposable diaper that is guided and diffused in a groove to retain urine and does not give a wet feeling to the body.

[0002]

2. Description of the Related Art Conventionally, a large number of pulp cotton has been used as an absorber in a disposable diaper. A typical structure of such a conventional paper diaper will be described with reference to FIG. 9. A pulp cotton laminate b is placed on a paper receiving a, and a sheet member c such as a vinyl sheet is laid under the paper a and at the same time, an upward The nonwoven fabric d is covered to seal both side edges e-1 and e-2, and both ends in the length direction (direction perpendicular to the paper surface in FIG. 9) are also sealed.

Although the substantially finished product has a flat shape,
There are also diaper-shaped diapers or bowl-shaped diapers with side edges.

The pulp cotton used as a material for such a paper diaper is obtained by crushing wood, that is, softwood or hardwood, and pulping.

The fiber length of pulp cotton is about 1.8 to 3.2.
Although it is about 〓, the fiber length is further shortened by crushing and other treatments, and when it is laminated to form a paper diaper, it is easily disintegrated and scattered because there is no adhesion due to the entanglement of the fibers.

If there is no entanglement of the fibers, the capillary phenomenon does not occur, so that there is no migration of water, and when water is dropped on the pulp-cotton laminate of the paper diaper, only the part where the water is dropped collapses and collapses. Nevertheless, pulp cotton is widely used as a main material for disposable diapers.

[0007]

However, when examining the state of absorption and retention of urine in such a conventional paper diaper, there are some unfavorable problems.
Listed below.

Urine passes through the outer packaging material (nonwoven fabric d) that directly contacts the body and is inhaled and settled into the pulp cotton laminate b. The manner of this inhalation and sedimentation is substantially as shown by the broken line in FIG. It is limited to the substantially local range R.

This local range R is substantially the same as the range in which urine is excreted and first comes into contact with the disposable diaper, and even if urine is inhaled and settled into the thickness of the pulp cotton body b, it is indicated by an arrow X. Such a spread in the width direction cannot be expected, and similarly, there is no spread in the length direction (not shown), and the pulp cotton is simply depressed and settled in the vertical direction Z.

When a large amount of urine is locally excreted, it cannot be carried in the local range R, and the urine reaches a sheet member c such as a vinyl sheet at the bottom and flows out to the periphery thereof.

A part of the urine is a sheet member c such as a vinyl sheet.
Penetration into the lower surface of the pulp cotton that is in contact with the skin is inhaled, but the penetration amount is very small because the pulp cotton does not have a suction action, and most of the urine is vinyl sheets around the local range R etc. Accumulated on the sheet member c of the side edges e-1, e-
It will leak from 2.

In order to prevent the lateral leakage of the paper diaper, it is necessary to perform a process of squeezing the portion of the sheet member c such as a vinyl sheet located between the crotch into a bowl shape or a process of shrinking the side edges.

However, the process of squeezing the part located between the crotch into a bowl shape and the process of shrinking the side edges are expensive in terms of processing cost and economically disadvantageous. In doing so, the local range R becomes like a valley, so that urine accumulates, and the area around the local range R gets wet, which is a sensation and gives a very uncomfortable feeling.

Further, the pulp cotton used for the purpose of inhaling and retaining urine, on the contrary, not only has the opposite effect of creating a "urine pool" to give a stronger wet feeling, but also the body of the worn part There is the inconvenience of getting stuffy and possibly causing a rash.

Further, in terms of materials, most of the remaining pulp cotton is not useful for holding inhalation of urine and is discarded without being used, which requires a large amount of material and is economical. There is a disadvantage that it is disadvantageous to.

As the only conventional measure for compensating for the above-mentioned drawbacks of pulp cotton, at present most of the products use a polymer absorbent together.

Referring to FIG. 9, the polymer absorbent is inserted between the pulp cotton laminate b and the nonwoven fabric d. The polymer absorbent, that is, Pomaly, has a strong hydrophilic property and is capable of absorbing a liquid up to 60 times its own weight, and also has a property of holding the liquid, swelling and gelling.

However, due to the lack of the function of diffusing the liquid to the surroundings, only the polymer located below the local range R is absorbed and saturated, and the liquid is moved to the surrounding polymer away from the local range R. That is, it does not result in eliminating the local "urine retention" of the pulp cotton.

Not only that, but when the virgin pulp of wood is used for one-time waste treatment, it is said that the annual consumption of the wood exceeds 1 billion tons.

If this happens, it will have a great adverse effect on the protection of the earth's forest resources, and by about 2010 AD, the aged population of Japan will be four times the current level, the amount of disposable diapers will increase, and the problem of garbage disposal will increase. It is speculated that it will have a great adverse effect on so-called environmental protection.

Therefore, it is necessary to improve the idea that it is best to use pulp cotton from wood for the absorbent body of the paper diaper.

As an alternative to the wood fiber, there is a phyllaceous plant fiber. For example, sugar cane fiber. The problem is that its fiber length is around 1.5 liters, so it is extremely difficult to form a shape-stable pulp cotton laminate with sugar cane fibers by the prior art. That is, even if a pulp-cotton laminate is formed, it will collapse even if a little force is applied because there is no entanglement between the fibers.

The inventor of the present invention suitably adds water to one surface of the short fiber laminate, for example, the surface thereof, pressurizes it, and dries it to bring about a chemical bond between the fibers of the surface to form a high-density skin layer. Then, we have developed a technology that brings shape stability together with a group of unentangled fibers underneath that.

As a result, the short fiber laminate having the skin layer on the surface not only maintains the shape stability, but also absorbs water in all directions in the skin layer due to the capillary phenomenon between the fibers, and is continuously connected to the skin layer. It has the effect of holding urine that is not diffused together with the entangled fiber group.

The present invention also provides the above-mentioned urine pool in the disposable diaper, or the feeling of wetness that may be felt when a body part is placed on a wet cloth, uneconomical use of materials, etc. It solves various problems of.

Further, the paper diaper of the present invention is mainly made of pulp cotton similar to the conventional products, but may be short fiber pulp cotton obtained from the plants of the family Rhizophoraceae, and most of the materials used for inhalation retention of urine. It is an object of the present invention to provide an economical paper diaper that makes maximum use of the paper diaper, downsizes the entire paper diaper, and has a comfortable feeling of use without a feeling of wetness.

[0027]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention substantially eliminates the entanglement of a first pulp cotton laminate and urine under the first pulp cotton laminate to substantially eliminate urine. A perforated partitioning layer that drops urine downward without being absorbed into, and a skin layer formed by intertwining and binding pulp cotton that guides urine that flows down from the pore gaps of the perforated partitioning layer by grooves to diffuse and permeate, Forming a paper diaper composed of a second pulp and cotton laminate, which is integrally continuous with the pulp cotton on the lower side of the skin layer and on both sides, and the pulp cotton is substantially not entangled and bound to each other,
It is characterized in that a raised portion having a predetermined length and a predetermined height is provided at a portion that encloses the local area of the second pulp and cotton laminate.

[0028]

The main part of the paper diaper according to the present invention is composed of the first pulp-cotton laminate, which is not easily entangled with each other, and is easily collapsed, and the first pulp-cotton laminate is densely formed on one side thereof. Between the groove of the perforated partition layer in the leather layer of the second pulp cotton laminate and the second pulp cotton laminate which is integrally continuous with the pulp layer having high strength and the lower and peripheral pulp cotton The upper surface of the convex portion is treated with a non-water-absorbing material, and a perforated partition layer that connects to the groove consisting of the side surface and the bottom surface below the hole gap is provided, and the skin layer portion provided with these perforated partition layers has a predetermined height. , And a raised portion that is raised to a predetermined length and a predetermined height is formed.

When the above-mentioned paper diaper is applied to the crotch in a U-shape, first, the local portion is naturally sandwiched and adheres to the bottom of the groove or the vicinity thereof. In that case, the urination range is limited to spots, and the urine is inhaled and settled in the first pulp and cotton laminate, reaches the perforated partition layer of the second pulp and cotton laminate, and directly flows into the groove bottom portion, or between the groove and groove. What has reached the upper part of the convex portion between is not water-absorptive and does not penetrate, so that it flows along the side surface and is guided and dispersed by the action of the skin layer forming the groove in the groove direction.

Therefore, the portion where the diaper gets wet due to urination is limited to the spot area of the urine suction port, and this also does not directly touch the body due to the above-mentioned raised portion.

The wet diaper-free paper diaper according to the present invention is achieved as described above.

Since the first pulp-cotton laminate is placed on the raised portion as described above, the body does not feel a raised protruding tactile sensation.

As described above, the disposable diaper of the present invention has the first diaper.
The pulp cotton laminate inhales and passes urine, and reaches the perforated partition layer of the skin layer of the second pulp cotton laminate described above, and flows into the groove, or the upper portion does not penetrate, so it flows along the side surface into the groove. , Induced dispersion in the preferred range.

That is, this is a phenomenon under the surface of the first pulp and cotton laminate which is not touched by the body. Further, since this structure is in the ridge having a predetermined height, except for the urination site. It does not touch the body and give a feeling of soothingness.

[0035]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of the present invention. 1-3, 2 is a disposable diaper.

This paper diaper 2 has a first pulp-cotton laminate 4 at the top and a first pulp-cotton laminate 4 below it.
The perforated partition layer 6 which inhales and drops in the downward direction without substantially passing through the urine, and the urine which drops downward in the width direction X, and more predominantly, the directionality in the length direction Y. And a skin layer 8 for inducing diffusion (of course, the perforated partition layer 6 is formed of this skin layer 8) and a second pulp-cotton laminate 10 which is essentially integrally continuous.

As shown in FIG. 1, a raised portion having a plurality of grooves 12 and having a predetermined height, and as shown in FIG. 3, having a predetermined length in parallel with the longitudinal direction of the disposable diaper 2. 14 is formed.

Under the second pulp / cotton laminate 10, a polymer 16 which is a polymer absorbent material and a waterproof paper 18 are disposed below the polymer 16 and the whole is covered with a nonwoven fabric 20.

As shown in FIG. 1, two upper and lower nonwoven fabrics 20 are provided.
The a and 20b are heat-sealed 22-1 and 22-2 at both side edges 2-1 and 2-2 of the paper diaper 2, and both ends in the length direction are also heat-sealed to form the paper diaper 2 although not shown.

Pulp cotton is an agglomerate of short fibers, and since the short fibers are substantially not entangled with each other, they are very brittle and easily collapse.

Such pipe cottons having no entanglement are laminated and tightened to be densified to have a desired thickness to form first and second pulp cotton laminated bodies 4 and 10.

Inside the first and second pulp cotton laminates 4 and 10, a jet device may be attached to a hammer mill, which is a pulp sheet crusher (not shown), and a powdered deodorant and the like may be appropriately mixed.

To form the skin layer 8 on the second pulp-cotton laminate 10, the pulp cotton is dropped on a moving breathable belt (not shown), laminated to an appropriate thickness, and sucked from below. After tightening, the surface is hydrated by spraying or splashing means (not shown) to such an extent that it penetrates from the surface to a certain thickness.

Incidentally, the portion of the laminated body that does not receive water is the second pulp cotton laminated body 10. Then, the second
Pressure was applied along the length direction of the pulp-cotton laminate 10 (direction indicated by arrow Y in FIG. 2), and the fibers were heated and dried quickly to densely bind the fibers together, thereby adding water and pressure. Skin layer 8 with a certain strength, in which only the fibers of the part are tightly bound
Is formed.

Capillary phenomenon predominantly works in this densely bound layer. The strength of the aggregate layer is obtained by binding the fibers to each other, and even if water is dropped on the aggregate layer, the second pulp cotton does not collapse due to crushing of the inhaled portion unlike the second pulp cotton laminate 10 which is not entangled. The thickness of the skin layer 8 can be changed by adjusting the amount of water and pressure applied to the surface of the laminate.

The lower part 8d of the skin layer 8 is continuous with the second pulp and cotton laminate 10. In the second pulp-cotton laminate 10, there is no entanglement of fibers, and the lower portion 8d of the skin layer 8 is shown by dots and lines for convenience in FIG. 2, but in reality, there is a clear boundary between them. There is not. Moreover, the skin layer 8 is integrally continuous with the second pulp and cotton laminate 10 also in the periphery thereof.

Next, in order to form the perforated partition layer 6,
First, a hole gap 8s is formed on the surface of the skin layer 8. As shown in FIGS. 1 and 2, the hole gap 8s is composed of a plurality of grooves 12 extending in the length direction. For example, the groove 12 presses a roller (not shown) having a large number of corresponding ridges (not shown) against the surface of the skin layer 8 so that the surface portion of the skin layer 8 contacting the ridge (not shown) is depressed. It is formed by Then, the non-water-absorptive coating 24 is formed by applying it by an appropriate method such as applying a waterproofing agent or a water repellent to the surface of the convex portion formed on the skin layer 8.

In FIG. 2, the non-water absorptive film 24 is illustrated as being opaque, but it may be opaque or transparent.

Further, although the groove 12 is drawn as a rectangular shape having a sharp edge, it is easy to understand that when the groove 12 is formed by being pushed in by a roller (not shown), neither the edge nor the bottom of the groove 12 has a sharp shape. Will be done.

Thus, a large number of grooves 12 extending in the longitudinal direction.
And the non-water absorptive film 24 between the grooves 12 and the grooves 12 form the partition layer 6 with holes. The non-water-absorbent coating 24 is the skin layer 8
The urine reaching the non-water-absorptive film 24 is not absorbed but is repelled to the surroundings, or is passed along the side surface of the protrusion and is dropped into the groove 12 in the longitudinal direction of the groove 12. And is permeated and diffused into the skin layer 8.

The water-absorbent coating 24 once permeates the skin layer 8 and the second pulp and cotton laminate 10.

Further, even if pressure is applied to urine in the process of permeation, it does not return to the first pulp cotton laminate 4.

Furthermore, a large number of grooves 12 extending in the lengthwise direction as described above, and the grooves 12 are formed in a substantially central portion of the disposable diaper 2.
Between the groove 12 and the groove 12, there is a non-water-absorbing film 24 on the upper surface of the convex portion, and the partition layer 6 with holes. The skin layer 8 is raised to a length that spans the crotch and to a moderately preferable height. From a different point of view, the groove 12 extending in the longitudinal direction and the non-water-absorbent coating 24
The surface and edge of the skin layer 8 having the perforated partitioning layer 6 composed of 1 and 2 are depressed so as to have a preferable height.

Naturally, the ears 26 showing the end portions of the skin layer 8 are integrally connected to the second pulp / cotton laminate 10.

The local parts located there are completely sandwiched and fitted. As a result, urine is sucked into the disposable diaper 2 in the spot area and does not get wet outside the area.

The raised portion 14 will be described below.

The depression 28 formed in the raised portion 14 is
The disposable diaper 2 is pushed up from the lower part of the main body thereof and has a closed and raised point 30, and then the edges 32-1, 32.
-2 extends in the left-right direction in the longitudinal direction to form a boat-like shape, and the rear end portion 34 is open. This depression 28 is
The tip portion 30 is depressed at a considerably sharp angle, but as the edges 32-1 and 32-2 extend in the longitudinal direction, the angle becomes gradually slower and reaches the rear end portion 34 to become flat. Therefore, it is almost parallel to the plane of the diaper 2.

Next, when the lower half of the body is operated by mounting the paper diaper 2, the flat body portion of the paper diaper 2 having the raised portion 14 has an inverted V shape in the crotch area, and the vicinity of the top thereof is as shown in FIG. It becomes a state.

When the disposable diaper 2 is attached by the usual method, the local area substantially encloses the depressed portion 28 of this boat shape regardless of gender. In other words, the paper diaper 2 sandwiched between the groins becomes an inverted V shape having the depression 28, and when the vertical end of the paper diaper 2 is pulled up, the boat-shaped tip 30 of the main body and both edges in the vertical direction. Parts 32-1 and 32-2
Is also pulled at the same time, and both edge portions 32-1 and 32-2 also rise inward and are in a depressed state.

Now, the function of inhaling, guiding, diffusing and holding urine of the disposable diaper 2 of the present invention will be described in the groove 12.

As shown in FIGS. 1 and 2, excreted urine passes through the non-woven fabric 20 and the first pulp and cotton laminate 4 in the local range R and reaches the perforated partition layer 6.

Since the first pulp-cotton laminate 4 is a short fiber aggregate having no entanglement, urine reaches the perforated partition layer 6 instantaneously without remaining in the first pulp-cotton laminate 4, and the pore gap 8s. Falls into the groove 12.

Therefore, a part of the body is in contact only with the local range R of the first pulp / cotton laminate 4, and when urine is inhaled, the local range R is slightly depressed. As a result, it does not give a wet feeling to the body.

In addition, the first pulp and cotton laminate 4 has a raised portion 14
It provides a cushioning effect to the depression 28.

The urine that has reached the non-water-absorptive coating 24 of the perforated partitioning layer 6 flows down into the groove 12 and is induced and diffused in the longitudinal direction of the groove 12 to permeate the skin layer 8. The urine that once permeates the skin layer 8 cannot reversely permeate upward due to the reverse pressure or the like because the partition layer 6 with the perforations is present. Even if there is reverse osmosis from the opening of the groove 12, it does not reach the body because it is absorbed at the bottom of the first pulp cotton laminate 4.

The skin layer 8 is predominantly pulled in the lengthwise direction by the action of the groove 12 mainly by the action of the capillarity, and is pulled in the widthwise direction to some extent, and is diffused in the lengthwise and crosswise directions until it reaches the second pulp / cotton laminate 10. 2 will be spread over the entire preferred range. The skin layer 8 not only diffuses urine,
It also has the ability to hold things.

The urine thus diffusively permeated and retained in the skin layer 8 is transferred to the second pulp / cotton laminate 10, that is, partly to the arrow X and mostly to the arrow when the skin layer 8 cannot be fully retained. Penetrates in the Z direction. The permeation in the Z direction does not occur only in the local range R as in the case of the conventional product of FIG. 9 but generally over the area where the skin layer 8 is formed. The amount becomes a small amount per unit area, and a large amount of urine does not locally pass through the second pulp cotton laminate 10 and reach the bottom thereof, and the length direction of the second pulp cotton laminate 10 and In the width direction, which is also under the first pulp and cotton laminate 4, is kept in a moist state in the skin layer 8 mainly under the non-water-absorbing film 24, and the local area as in the conventional product is maintained. The uneconomical situation of leaving a dry state in most of the second pulp cotton laminate 10 in the lengthwise portion other than R disappears, and when the pulp cotton laminate in the preferable range is effectively used, the paper diaper 2 itself It also leads to downsizing, which in turn is a foothold for resource conservation That. That is, it is possible to effectively utilize forest resources.

Also, the use of sugar cane fibers as pulp cotton, at least in part, can further contribute to the protection of forest resources.

The water-resistant paper 18 has a second surface that is almost evenly damp.
Is placed to support the pulp and cotton laminate 10, and the second
It does not receive urine falling through the pulp and cotton laminate 10.

Therefore, the waterproof paper 18 need not be a conventional sheet of vinyl, poly, etc., and may be wrapped with the nonwoven fabric 20, but for the sake of safety, waterproof paper,
Furthermore, a polymer absorbent, that is, a polymer is arranged in anticipation of a large amount of urination.

Further, the ears 26 on both side edges of the second pulp / cotton laminate 10 prevent diffusion of urine by the perforated partition layer 6 and the skin layer 8 within a preferable range. Since the ears 26 are aggregates of fibers which are not entangled with each other, they do not have a function of diffusing, osmotic transfer of urine, and prevent leakage by themselves.

FIG. 4 shows a second embodiment of the present invention. In the second embodiment, the portions having the same functions as those of the first embodiment will be described with the same reference numerals.

The feature of the second embodiment is that the paper diaper 42 in the first embodiment is formed without forming the raised portion 14 and only the polymer 44 is interposed to form the paper diaper 42.

That is, assuming a case where the amount of urine is large and induction dispersion cannot be completed in the skin layer, in preparation for such a situation, the polymer 44 is placed under the second pulp cotton laminate 46. By the way, the urine falling down is absorbed by the polymer 44,
In the upper part, the non-water-absorbing film 48 prevents backflow of urine, and the groove 5
The reverse flow of urine from the 0 opening is absorbed at the bottom of the first pulp and cotton laminate 52.

As a result, urine can be guided, dispersed and absorbed in the groove 50 without forming a raised portion in the disposable diaper 42, and the absorption amount of urine can be increased as compared with the conventional case, and the wet diaper can be absorbed. It is possible to eliminate the feeling of jarring and improve the usability of the diaper.

Further, by excreting the polymer 44, it is possible to sufficiently cope with the situation where a large amount of urine is discharged,
It is also possible to reduce the amount of pulp cotton used, which can contribute to the protection of forest resources.

The present invention is not limited to the above-mentioned embodiment, but various application modifications are possible.

For example, in the first embodiment of the present invention, the paper diaper is provided with the ridge and the polymer. However, as shown in FIG. 5, pulp cotton from wood and sugar cane is used, and the ridge is also formed. It is also possible to construct a disposable diaper 60 without a polymer. By the way, between the first and second pulp cotton laminates 62 and 64, that is, the second pulp cotton laminate 6
4 By forming a perforated partition layer 70 composed of grooves 66 and a non-water-absorptive film 68 on the upper cotton, it is possible to induce, disperse and absorb urine, and to increase the absorption amount of urine as compared with the conventional case. As a result, the feeling of wetness can be eliminated, and the usability of the diaper can be improved.

Further, in the first embodiment of the present invention,
A groove 12 is formed in the perforated partition layer 6 of the paper diaper 2, and the non-water-absorbing film 24 is formed by applying a suitable method such as applying a waterproofing agent or a water repellent agent to the surface of the convex portion formed on the skin layer 8. However, as shown in FIG. 6, it is also possible to form a plurality of arc-shaped hole portions 80 in the perforated partitioning layer 6 and have these hole portions 80 function similarly to the groove 12. is there. At this time, the non-water-absorptive coating 24 is composed of a transparent member, and the fibers of the lower skin layer 8 are seen through.

Further, in the first embodiment of the present invention,
The non-water-absorbing film 2 is formed by applying an appropriate method such as applying a waterproofing agent or a water-repellent agent to the surface of the convex portion formed on the skin layer 8.
However, it is also possible to provide a perforated partition layer 90 which is separate from the skin layer 8. That is, as shown in FIG. 7, a perforated partitioning layer 90 is formed by forming slit-shaped groove holes 94 in a waterproof sheet 92 made of waterproof or water-repellent treated paper, nonwoven fabric, or the like.
It is what constitutes. Then, the perforated partition layer 90 is placed on the surface of the skin layer 8 and used.

Further, as shown in FIG. 8, when forming the perforated partition layer 100 which is separate from the skin layer 8, the waterproof sheet 10 is formed.
It is also possible to form a large number of openings 104 on the second side. At this time, the shape of the opening 104 is not limited to the rectangular shape, but may be a circular shape, an elliptical shape, or another shape.

When forming a groove in the perforated partition layer of the paper diaper, the width of the groove in the vicinity of the local range is reduced and the width of the groove is increased as the distance from the local range increases.
Moreover, it is also possible to form grooves radially from the crotch region. By so doing, urine can be effectively induced and dispersed by changing the width of the groove, and urine can be efficiently absorbed.

Furthermore, when forming a groove in the perforated partition layer of the paper diaper, it is possible to form the groove by gradually branching away from the local area. That is, the number of grooves increases as the distance from the local range increases. If so, urine can be effectively induced and dispersed by changing the number of grooves, and urine can be efficiently absorbed.

[0085]

As described in detail above, according to the present invention, the first pulp cotton laminate without entanglement and the urine which is under the first pulp cotton laminate without substantially absorbing urine is provided. A perforated partition layer that drops downward, a skin layer formed by intertwining and binding pulp cotton that guides and diffuses and permeates urine that flows from the pore gaps of the perforated partition layer in a groove, and pulp cotton under the skin layer and on both sides. To form a paper diaper composed of a second pulp and cotton laminate which is integrally continuous with the pulp cotton and which is substantially not entangled and bound to each other, and has a predetermined length and a predetermined height at a portion which encloses a local range of the second pulp and cotton laminate. Since the ridges having a and are provided, urine can be diffused and distributed in a preferable range of the paper diaper, so that the maximum effective use of the pulp cotton is possible,
By providing a raised portion, inhalation of urine becomes the minimum range,
For this reason, if the leaky sensation transmitted to the body is eliminated, and if the paper diaper is replaced with the same amount of urine as the conventional one, the entire paper diaper can be downsized and the wearing feeling can be improved. Further, it is possible to prevent side leakage even in a flat shape without providing a complicated squeeze or shrinkage at the crotch portion or edge portion of the disposable diaper. Furthermore, the paper diaper of the present invention generally does not form a urine pool, has no side leakage, and in order to receive urine from a limited position, that is, a ridge, the paper diaper surface in contact with the body always gives a dry and soft feeling. , Practically advantageous.
Furthermore, urination is retained in the skin layer evenly in the lengthwise and widthwise directions of the second pulp and cotton laminate,
Unlike the conventional product, the uneconomical situation of leaving a dry state in most of the second pulp cotton laminate in the lengthwise portion other than the local range is eliminated, and the preferable range of pulp cotton is effectively used, The paper diaper can be miniaturized, the amount of pulp cotton used can be reduced, and forest resources can be effectively used.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a raised portion taken along the line 〓-〓 of FIG. 3 showing a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of a second pulp cotton laminate.

FIG. 3 is a schematic plan view of a raised portion.

FIG. 4 is a partially cutaway perspective view of a paper diaper showing a second embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a disposable diaper showing another embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a main part of a second pulp / cotton laminate showing a second embodiment of the present invention.

FIG. 7 is an enlarged perspective view of an essential part of a second pulp / cotton laminate showing a third embodiment of the present invention.

FIG. 8 is a schematic enlarged perspective view of a perforated partitioning layer showing a fourth another embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of a disposable diaper showing a conventional technique of the present invention.

[Explanation of symbols]

 2 Paper diapers 4 First pulp cotton laminate 6 Perforated partition layer 8 Skin layer 8s Hole gap 10 Second pulp cotton laminate 12 Groove 14 Raised portion 16 Polymer 18 Water resistant paper 20 Nonwoven fabric 22-1, 22-2 Heat seal 24 Non Water-absorbent coating 26 Ear 28 Cavity 30 Tip 32-1, 32-2 Edge 34 Rear end

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[Procedure amendment]

[Submission date] July 18, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 8]

[Figure 9]

FIG.

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

Claims (2)

[Claims] 1. A first pulp and cotton laminate having no entanglement,
Under the first pulp-cotton laminate, a perforated partition layer that drops urine downward without substantially absorbing the urine, and urine that flows down from the pore gap of the perforated partition layer is guided by the groove. It is composed of a skin layer formed by intertwining and binding pulp cotton to be diffused and permeated, and a second pulp cotton laminate in which the pulp cotton on the lower side and both sides of the skin layer is integrally continuous and the pulp cotton is substantially not intertwined and bound. A paper diaper, wherein a paper diaper is formed, and a raised portion having a predetermined length and a predetermined height is provided at a portion that encloses a local area of the second pulp and cotton laminate. 2. The paper diaper according to claim 1, wherein the pulp cotton forming the first pulp cotton laminate and the second pulp cotton laminate comprises at least a part of short fiber pulp cotton.