JP2022002684A - Diaper - Google Patents

Abstract

[Problem] To prevent slipping down while increasing the breathability of a diaper. [Solution] A diaper 2 comprises a soft region 3, a hard region 4 harder than the soft region 3, and a middle region 5 harder than the soft region 3 and softer than the hard region 4. The soft region 3 includes a ventral end 2f or a dorsal end 2r, and extends in the width direction. The hard region 4 is provided closer to the crotch portion than the soft region 3. The middle region 5 spans between the soft region 3 and the hard region 4 and extends in the width direction. The middle region 5 is provided with a first reinforcing portion 6C that extends in the longitudinal direction and is more reinforced than other portions to form a beam structure. [Selected Figure] Figure 3

Description

This case concerns diapers with improved breathability.

Conventionally, various techniques for improving the air permeability of diapers have been known. For example, a technique has been proposed in which the entire circumference of the unfolded diaper surrounding the waterproof film is composed of only non-woven fabric to improve the air permeability of the wearer's waist and crotch area (patented). See Document 1).

Japanese Unexamined Patent Publication No. 2001-95838

When the ventral end and the dorsal end of the diaper are made of only non-woven fabric without the waterproof film as described above, they are more flexible and more easily bent than the part where the waterproof film is placed. , The diaper may be rolled outward (non-skin side) when worn by the wearer. If the ventral and dorsal ends are greatly rolled up, the contact area with the outer garment (for example, trousers) increases, which causes the diaper to slip off. Conventional diapers have room for improvement in suppressing such slippage.

This case was devised in view of the above-mentioned problems, and one of the purposes is to improve the air permeability of the diaper and prevent it from slipping off.

The diaper in this case includes a ventral end or a dorsal end, a soft region extending in the width direction, a hard region provided on the inseam side of the soft region and harder than the soft region, and the above. It comprises a middle region that spans between the soft region and the hard region and extends in the width direction, is harder than the soft region and softer than the hard region, and the middle region extends in the longitudinal direction and extends. It is characterized by having a first reinforcing part that is reinforced more than other parts to form a beam structure.

According to this case, it is possible to prevent the diaper from slipping off while increasing the air permeability of the diaper.

It is an exploded perspective view of a diaper. It is a top view of a diaper seen from the skin side. It is a plan view which looked at the main part of the front body of a diaper from the non-skin side. It is a plan view which looked at the main part of the back body of a diaper from the non-skin side. It is a schematic longitudinal sectional view (AA arrow sectional view of FIG. 3) of the front body of a diaper. It is a schematic longitudinal sectional view explaining the action of a diaper, (a) shows a state in which a soft region is rolled up, and (b) shows a state in which a middle region is rolled up in addition to a soft region. It is a schematic longitudinal sectional view (the figure corresponding to FIG. 5) of the front body which concerns on a modification. FIG. 7 is a schematic longitudinal sectional view showing a state in which the soft region and the middle region of the front body of FIG. 7 are rolled up. (A) is a front view (front view) of the diaper according to the modified example, and (b) is a rear view (rear view) thereof.

The form for carrying out this diaper will be described. This embodiment is merely an example, and there is no intention of excluding the application of various modifications and techniques not specified in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed or combined as appropriate.

[1. composition]
[1-1. overall structure]
First, the overall configuration of the diaper 2 according to the present embodiment will be described with reference to FIGS. 1 and 2.
In the diaper 2 of the present embodiment, when the diaper 2 is worn on the wearer, the front body 2A facing the wearer's abdomen and the back body 2B facing the wearer's back are provided with a fastening tape 1 (hereinafter referred to as a fastening tape 1). It is a tape type that is connected to each other by simply (referred to as "tape 1"). Here, a paper diaper (so-called disposable diaper) is illustrated as the diaper 2. In addition to the front body 2A and the back body 2B, the diaper 2 is provided with an inseam 2C facing the wearer's crotch in the worn state. The inseam 2C is located between the front body 2A and the back body 2B in a deployed state in which the diaper 2 is spread out in a plane.

Hereinafter, the direction connecting the front body 2A and the rear body 2B in the unfolded state is referred to as the “longitudinal direction”. Further, in a normal wearing state where curling does not occur, the side facing the wearer's skin is referred to as the "skin side", and the opposite side thereof is referred to as the "non-skin side". Further, the direction connecting the skin side and the non-skin side is defined as the "thickness direction", and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the "width direction". In addition, viewing from the thickness direction is referred to as "planar view".
The diaper 2 of the present embodiment is formed symmetrically with respect to the center line O in the width direction. The diaper 2 includes a tape 1, an absorber 21, various sheets 22 to 26, and various gathers 27 to 29. Hereinafter, these configurations will be described in order.

<Tape>
The tape 1 is non-detachably provided on both sides in the width direction of one of the front body 2A and the back body 2B, and is detachably provided on the other of the front body 2A and the back body 2B. In the present embodiment, the back body 2B (one of the front body 2A and the back body 2B) is provided on both sides in the width direction, and is fixed to the front body 2A (the other of the front body 2A and the back body 2B) when the diaper 2 is worn. The tape 1 to be made is illustrated. The number of tapes 1 is not particularly limited, but here, an example is shown in which tapes 1 are provided on both sides of the back body 2B in the width direction (a total pair).

<Absorber>
The absorber 21 is a mat-like member having a liquid absorbing property. The absorber 21 is formed, for example, by wrapping a mat in which a super absorbent polymer (SAP) is mixed with fluff pulp with a hydrophilic non-woven fabric or a core wrap sheet such as tissue paper. The absorber 21 has a larger dimension (thickness dimension) in the thickness direction than the tape 1 and the sheets 22 to 26.

The absorber 21 extends in the longitudinal direction over the front body 2A, the inseam 2C, and the back body 2B. The absorber 21 is arranged in a region including a portion where excrement such as urine and feces can be excreted from the wearer. Here, the absorber 21 provided on the non-skin side and in the central portion in the width direction with respect to the top sheet 22 described later, which forms the skin facing surface facing the wearer's skin in the diaper 2, is exemplified.

<Sheet>
Each of the sheets 22 to 26 is a sheet-like member that spreads along the longitudinal direction and the width direction in the unfolded state.
A top sheet 22 (surface sheet, skin surface sheet) having liquid permeability is arranged on the skin side of the absorber 21. The top sheet 22 is formed longer than the absorber 21 in the longitudinal direction and the width direction, and is provided so as to cover the absorber 21 from the skin side. The top sheet 22 extends to the surface (front surface) on the skin side in the diaper 2. The top sheet 22 is made of, for example, a woven fabric or a non-woven fabric. Here, the top sheet 22 having a rectangular shape in a plan view is illustrated.

The top sheet 22 of the present embodiment is provided over the entire area of the diaper 2 in the longitudinal direction. That is, as shown in FIG. 2, the top sheet 22 extends between one end 2f and the other end 2r of the diaper 2 in the longitudinal direction. Hereinafter, of the one end portion 2f and the other end portion 2r in the longitudinal direction of the diaper 2, the end edge extending in the width direction on one side of the front body 2A side is also referred to as "ventral end portion 2f", and the other end portion on the back body 2B side. The edge extending in the width direction is also referred to as "dorsal end 2r".

The top sheet 22 of the present embodiment is provided with a groove-shaped recess 6 (reinforcing portion) extending in the longitudinal direction. The recess 6 has a shape recessed toward the non-skin side on the surface of the top sheet 22 on the skin side, and is formed by, for example, embossing the top sheet 22. Here, an example is shown in which a large number of recesses 6 extending linearly over the entire length of the top sheet 22 are arranged at equal intervals in the width direction.
The recess 6 is reinforced in the top sheet 22 more than other parts other than the recess 6 to form a beam structure. The recess 6 extending in the longitudinal direction opposes a bending line in which a line intersecting the longitudinal direction (for example, a line along the width direction) is a polygonal line in a plan view.

On the outside of the top sheet 22 in the width direction, a side sheet 23 having liquid impermeableness is arranged in order to prevent liquid leakage from the absorber 21 to the outside in the width direction. The side sheet 23 is preferably made of a material that is breathable and flexible. Examples of the material applied to the side sheet 23 include SMS (Spunbond Meltblown Spunbond) non-woven fabric and SMMS (Spunbond Meltblown Meltblown Spunbond) non-woven fabric.
A pair of side sheets 23 are provided on both sides of the top sheet 22 in the width direction and extend in the longitudinal direction. Like the top sheet 22, the side sheet 23 of the present embodiment is provided over the entire area of the diaper 2 in the longitudinal direction.

As shown in FIG. 1, on the non-skin side of the absorber 21, a back sheet 24 having liquid impermeableness is arranged in order to prevent liquid leakage from the absorber 21 to the non-skin side. The back sheet 24 of the present embodiment is formed shorter in the longitudinal direction than the top sheet 22, and is located inside the ventral end 2f and the dorsal end 2r in the longitudinal direction. The backsheet 24 is made of, for example, a film.

On the non-skin side of the back sheet 24, a cover sheet 25 (front sheet, non-skin surface sheet) is arranged to reinforce the back sheet 24 and improve the tactile sensation (for example, touch). The cover sheet 25 extends to the non-skin side surface (back surface) of the diaper 2. The cover sheet 25 extends between the ventral end 2f and the dorsal end 2r of the diaper 2. The cover sheet 25 is made of, for example, a woven fabric or a non-woven fabric.
The tape 1 is sandwiched between the cover sheet 25 and the side sheet 23.

A target sheet 26 (functional material) to which the tape 1 is attached is attached to the surface of the cover sheet 25 on the non-skin side. Here, the target sheet 26 provided on the front body 2A (the other of the front body 2A and the back body 2B) is illustrated.
The target sheet 26 is a sheet-like member having a function as a fastening destination of the tape 1. The target sheet 26 of the present embodiment has a rectangular shape in which the dimension in the width direction is larger than the dimension in the longitudinal direction in a plan view, and extends in the width direction. The target sheet 26 constitutes a fastening mechanism together with a fastening material (not shown) provided on the tape 1. As the fastening mechanism, for example, a planar fastener that is mechanically bonded by a hook material (male member) and a loop material (female member) can be applied.

<Gather>
The gathers 27 to 29 are formed by folds of the side sheet 23, the cover sheet 25, and the like by elastic members 7 to 9 such as rubber, elastic film, and polyurethane. The gathers 27 to 29 have a function of improving the fit of the diaper 2 to the wearer. It should be noted that FIGS. 1 and 2 show the diaper 2 in which the wrinkles of the gathers 27 to 29 are stretched.

The three-dimensional gather 27 is configured such that the inner portion of the side sheet 23 in the width direction is wrinkled by the elastic member 7 so as to be stretchable in the longitudinal direction. A pair of three-dimensional gathers 27 are provided on both sides of the top sheet 22 in the width direction and on the skin side, and extend in the longitudinal direction. Here, an example is shown in which a plurality of thread-shaped elastic members 7 extending along the longitudinal direction are provided at intervals in the width direction. The three-dimensional gather 27 stands up on the skin side by contracting the elastic member 7 in the longitudinal direction.
The leg gather 28 is provided at a position along the wearer's leg in the diaper 2. The leg gather 28 is formed by, for example, the side seat 23, the back seat 24, and the cover sheet 25 being wrinkled in the longitudinal direction by an elastic member 8 extending in the longitudinal direction.

The waist gather 29 is provided at a position facing the wearer's waist (above the buttocks) in the diaper 2. Here, a waist gather 29 in which the sheets 22 to 25 are wrinkled so as to be stretchable in the width direction by an elastic member 9 (functional material) elastically deformed in the width direction is exemplified. As described above, the elastic member 9 forming the waist gather 29 has a function of enhancing the fit of the back body 2B to the waist of the wearer. Here, a sheet-shaped elastic member 9 arranged in the longitudinal direction and the width direction is illustrated. The elastic member 9 of the present embodiment is laminated between the top sheet 22 and the back sheet 24.

[1-2. Main part composition]
Hereinafter, the three types of regions 3 to 5 provided in the diaper 2 will be described in detail with reference to FIGS. 3 to 5.
The diaper 2 has three types of regions 3 to 5 having different hardness (flexibility) from each other. In this embodiment, a diaper 2 in which three types of regions 3 to 5 are provided in each of the front body 2A shown in FIG. 3 and the back body 2B shown in FIG. 4 is illustrated.

Here, of the three types of regions 3 to 5, the softest (easily bendable) region is also referred to as "soft region 3", and the hardest (hard to bend) region is also referred to as "hard region 4", which is more than the soft region 3. Those that are hard and softer than the hard region 4 are also referred to as "middle region 5". These regions 3 to 5 are the soft region 3, the middle region 5, and the hard region 4 so that the diaper 2 becomes gradually harder from the ventral end 2f or the dorsal end 2r toward the inseam 2C side. It is set in the order of.
Hereinafter, the regions 3 to 5 provided in the front body 2A are also referred to as "front soft region 3A", "front hard region 4A", and "front middle region 5A", and the regions 3 to 5 provided in the back body 2B are referred to. , "Post-soft region 3B", "post-hard region 4B", "post-middle region 5B".

The recess 6 of the present embodiment extends over the soft region 3, the middle region 5, and the hard region 4. More specifically, the recess 6 extends over the anterior soft region 3A, the anterior middle region 5A, and the anterior hard region 4A, and extends over the posterior soft region 3B, the posterior middle region 5B, and the posterior hard region 4B. do. Hereinafter, of the recesses 6, the portion provided in the soft region 3 is also referred to as a soft recess 6A (second reinforcing portion), and the portion provided in the hard region 4 is also referred to as a hard recess 6B, and is provided in the middle region 5. The portion is also referred to as a middle recess 6C (first reinforcing portion).

First, the front body 2A will be focused on and explained.
As shown in FIGS. 3 and 5, the front body 2A has an anterior soft region 3A and an anterior middle region from the ventral end 2f toward the inseam 2C (inner in the longitudinal direction, lower in FIG. 3). 5A and the front hard region 4A are provided side by side in this order without any gap. In this embodiment, an example is shown in which the anterior soft region 3A, the anterior middle region 5A, and the anterior hard region 4A are set in the central portion of the diaper 2 in the width direction.

The anterior soft region 3A includes the ventral end 2f and extends in the width direction. The top sheet 22 and the cover sheet 25 are laminated on the front soft region 3A of the present embodiment, and the back sheet 24 and the absorber 21 are not provided. That is, the front soft region 3A is a region in which the top sheet 22 and the cover sheet 25 are overlapped in the thickness direction on the ventral end 2f side of the back sheet 24. Side sheets 23 are also provided on both sides of the front soft region 3A in the width direction.
A soft recess 6A is provided in the front soft region 3A of the present embodiment. In the front soft region 3A provided with the soft concave portion 6A, rounding around the axis intersecting in the longitudinal direction in a plan view is suppressed as compared with the case where the soft concave portion 6A is not provided. As a result, the anterior soft region 3A is easily folded back with respect to the anterior middle region 5A while maintaining a substantially flat posture.

The front soft region 3A of the present embodiment has a longitudinal dimension L1 of 5 mm or more and 15 mm or less from the viewpoint of appropriately setting the folding mode. That is, the anterior soft region 3A is set as a region within a range of 5 mm or more and 15 mm or less from the ventral end 2f to the inseam 2C side.
Further, the front soft region 3A of the present embodiment has a smaller friction coefficient (both static friction coefficient and dynamic friction coefficient) on the surface on the skin side than on the surface on the non-skin side. Therefore, in the anterior soft region 3A, the surface on the skin side has a more slippery property than the surface on the non-skin side.

In the front soft region 3A of the present embodiment, the surface on the non-skin side is composed of the cover sheet 25, and most of the surface on the skin side is composed of the top sheet 22. Therefore, in the present embodiment, the skin-side surface of the top sheet 22 is configured to be more slippery than the non-skin-side surface of the cover sheet 25, so that the skin-side and non-skin-side surfaces in the front soft region 3A are formed. The coefficient of friction is different from each other. It should be noted that such a friction coefficient (slipperiness) can be set by using a lubricant or by appropriately adjusting the material and surface shape of the top sheet 22 and the cover sheet 25. For example, by providing the recess 6 in the top sheet 22, the contact area of the surface on the skin side with the object is smaller than in the case where the recess 6 is not provided, so that the surface on the skin side can be made slippery.

The front hard region 4A is provided on the inseam 2C side of the front soft region 3A and is separated from the front soft region 3A. In addition to the top sheet 22 and the cover sheet 25, the back sheet 24 and the target sheet 26 are provided in the front hard region 4A of the present embodiment. That is, the front hard region 4A is a region in which the back sheet 24 and the target sheet 26 are overlapped (laminated) in the thickness direction in addition to the top sheet 22 and the cover sheet 25.

In addition to these sheets 22, 24 to 26, an absorber 21 is also arranged (laminated) in the front hard region 4A of the present embodiment. The absorber 21 is arranged (laminated) between the top sheet 22 and the cover sheet 25 as described above. More specifically, the absorber 21 is sandwiched between the top sheet 22 and the back sheet 24 in the thickness direction.
Side sheets 23 are also provided on both sides of the front hard region 4A in the width direction. Here, the arrangement in which the edge portion 21a on the ventral end 2f side of the absorber 21 and the edge portion 26a on the ventral end 2f side of the target sheet 26 overlap each other in the thickness direction is illustrated.

The front hard region 4A of the present embodiment is formed hard by setting a larger number of components (number of laminated layers) in the thickness direction than the front soft region 3A. Since the front hard region 4A is harder than the front soft region 3A, it is hard to bend and has a property that it is hard to be rolled up in the mounted state. The front hard region 4A of the present embodiment is provided with a hard recess 6B extending in the same straight line as the soft recess 6A.

The anterior middle region 5A extends between the anterior soft region 3A and the anterior hard region 4A and extends in the width direction. In the front middle region 5A of the present embodiment, the back sheet 24 is laminated in addition to the top sheet 22 and the cover sheet 25, and the absorber 21 and the target sheet 26 are not provided. That is, the front middle region 5A is a region in which the top sheet 22, the cover sheet 25, and the back sheet 24 are overlapped in the thickness direction on the ventral end 2f side of the absorber 21 and the target sheet 26. Side seats 23 are also provided on both sides of the front middle region 5A in the width direction.

The anterior-middle region 5A of the present embodiment is formed harder than the anterior soft region 3A by setting a larger number of components in the thickness direction. Further, the front middle region 5A is formed softer by setting the number of components in the thickness direction to be smaller than that of the front hard region 4A.
Compared to the anterior soft region 3A, the anterior middle region 5A is harder and therefore less likely to bend, and has the property of being less likely to be rolled up in the mounted state. On the other hand, the front-middle region 5A has a property that it is easy to bend because it is softer than the front-hard region 4A, and it is easy to roll up in the mounted state.

The front middle region 5A is provided with a middle recess 6C. In the front middle region 5A provided with the middle recess 6C, rounding around the axis intersecting in the longitudinal direction in a plan view is suppressed as compared with the case where the middle recess 6C is not provided. As a result, the front-middle region 5A is easily folded back with respect to the front-hard region 4A while maintaining a substantially flat posture.
Here, the middle recess 6C connected to each of the soft recess 6A and the hard recess 6B is illustrated, but the middle recess 6C is provided apart from (not connected to) at least one of the soft recess 6A and the hard recess 6B. May be good.

The front-middle region 5A of the present embodiment has a longitudinal dimension L2 of 5 mm or more and 15 mm or less from the viewpoint of appropriately setting the folding mode. That is, the anterior middle region 5A is set as a region within a range of 5 mm or more and 15 mm or less from the anterior soft region 3A to the inseam 2C side.
The front soft region 3A and the front middle region 5A adjacent to each other in the longitudinal direction have a total dimension La (= L1 + L2) in the longitudinal direction of 25 mm or less from the viewpoint of suppressing integral curling. That is, the anterior soft region 3A and the anterior middle region 5A are set as regions within a range of 25 mm or less from the ventral end 2f to the inseam 2C side.

Similar to the anterior soft region 3A, the anterior-middle region 5A of the present embodiment has a smaller friction coefficient (both static friction coefficient and dynamic friction coefficient) on the skin side surface than the non-skin side surface. Therefore, in the anterior-middle region 5A, the surface on the skin side has a more slippery property than the surface on the non-skin side.
Similar to the anterior soft region 3A, the front middle region 5A of the present embodiment has a cover sheet 25 on the non-skin side surface and a top sheet 22 on most of the skin side surface. Therefore, in the present embodiment, as described above, the skin-side surface of the top sheet 22 is more slippery than the non-skin-side surface of the cover sheet 25, so that the skin-side and non-skin-side surfaces in the anterior-middle region 5A are formed. The coefficient of friction on the surface of the surface is also different from each other.

As shown in FIG. 5, in the front body 2A of the present embodiment, the cover sheet 25 extends in a plane over the front soft region 3A, the front middle region 5A, and the front hard region 4A. On the other hand, the top sheet 22 has a stepped shape that rises toward the skin from the anterior soft region 3A to the anterior hard region 4A. Specifically, the top sheet 22 has a stepped shape that rises toward the skin from the anterior soft region 3A to the anterior middle region 5A according to the thickness dimension of the back sheet 24, and extends from the anterior middle region 5A to the anterior hard region 4A. , It forms a stepped shape on the skin side according to the thickness dimension of the absorber 21.
As described above, in the front body 2A of the present embodiment, the top sheet 22 on the skin side is stepped in the thickness direction according to the difference in the number of components in the thickness direction in the three regions 3A, 4A, and 5A. It is formed like this. As described above, in the front body 2A of the present embodiment, the cover sheet 25 on the non-skin side is flat, whereas the top sheet 22 on the skin side is uneven.

Next, the back body 2B will be mainly described.
As shown in FIG. 4, the rear body 2B has a posterior soft region 3B, a posterior middle region 5B, and a posterior region 2B from the dorsal end 2r toward the inseam 2C (inner side in the longitudinal direction, lower side in FIG. 4). The hard regions 4B are provided side by side in this order without any gaps. In this embodiment, an example is shown in which the rear soft region 3B, the posterior middle region 5B, and the posterior hard region 4B are set in the central portion of the diaper 2 in the width direction.

The posterior soft region 3B is different from the anterior soft region 3A in that it includes the dorsal end portion 2r, and has other points in common. That is, the rear soft region 3B is a region in which the top sheet 22 and the cover sheet 25 are overlapped in the thickness direction on the dorsal end portion 2r side of the back sheet 24, and extends in the width direction. The rear soft region 3B is provided with a soft recess 6A. Further, the posterior soft region 3B has a longitudinal dimension L3 of 5 mm or more and 15 mm or less, and has a smaller friction coefficient (both static friction coefficient and dynamic friction coefficient) on the skin side surface than on the non-skin side surface.

The posterior hard region 4B is provided on the crotch lower part 2C side with respect to the posterior soft region 3B, and is separated from the posterior soft region 3B. The rear hard region 4B is different from the front hard region 4A in that the waist gather 29 is a component instead of the absorber 21 and the target sheet 26, and other points are common. That is, in addition to the top sheet 22 and the cover sheet 25, the back seat 24 and the waist gather 29 are provided in the rear hard region 4B of the present embodiment. More specifically, the rear hardening region 4B is a region in which the back sheet 24 and the elastic member 9 are overlapped (laminated) in the thickness direction in addition to the top sheet 22 and the cover sheet 25.
The posterior hard region 4B of the present embodiment is formed to be rigid by setting a larger number of components in the thickness direction than the posterior soft region 3B. Since the rear hard region 4B is harder than the rear soft region 3B, it is less likely to bend and to be rolled up in the mounted state. A hard recess 6B is provided in the rear hard region 4B.

The posterior-middle region 5B differs from the anterior-middle region 5A in that it extends between the posterior soft region 3B and the posterior hard region 4B, and has other points in common. That is, the rear middle region 5B is a region in which the back sheet 24 is overlapped (stacked) in the thickness direction in addition to the top sheet 22 and the cover sheet 25 on the dorsal end portion 2r side of the waist gather 29. It extends in the width direction. Further, the rear-middle region 5B has a longitudinal dimension L4 of 5 mm or more and 15 mm or less, and has a smaller friction coefficient (both static friction coefficient and dynamic friction coefficient) on the skin side surface than on the non-skin side surface.

The posterior middle region 5B of the present embodiment is formed harder than the posterior soft region 3B by setting a larger number of components in the thickness direction. Further, the rear middle region 5B is formed softer by setting the number of components in the thickness direction to be smaller than that of the rear hard region 4B.
Compared to the rear soft region 3B, the rear middle region 5B is harder and therefore less likely to bend, and has the property of being less likely to be rolled up in the mounted state. On the other hand, the rear-middle region 5B has a property that it is easy to bend because it is softer than the rear-hard region 4B, and it is easy to roll up in the mounted state.

The middle recess 6B is also provided in the rear middle region 5B. In the rear middle region 5B provided with the middle recess 6C, rounding around the axis intersecting in the longitudinal direction in a plan view is suppressed as compared with the case where the middle recess 6C is not provided. As a result, the rear middle region 5B is easily folded back with respect to the rear hard region 4B while maintaining a substantially flat posture.

Even in the rear body 2B, the total dimension Lb (= L3 + L4) in the longitudinal direction of the posterior soft region 3B and the posterior middle region 5B adjacent to each other in the longitudinal direction is 25 mm or less. That is, the posterior soft region 3B and the posterior middle region 5B are set as regions within a range of 25 mm or less from the dorsal end 2r to the inseam 2C side.
In any of the rear soft region 3B, the rear hard region 4B, and the rear middle region 5B, side sheets 23 are provided on both sides in the width direction.

[2. Action and effect]
(1) When the diaper 2 is worn, the soft region 3 including the ventral end 2f or the dorsal end 2r is softer than the hard region 4 and the middle region 5, so that it is easy to move and is between the wearer's skin. Prone to create gaps in the skin. Since the gap created between the soft region 3 and the wearer's skin serves as an air passage, the diaper 2 provided with the soft region 3 can be provided with improved air permeability.

On the other hand, as shown in FIG. 6A by taking the front body 2A as an example, since the soft region 3 is softer than the hard region 4 and the middle region 5, it is outside (non-skin side) from the middle region 5 in the mounted state. ) May be rolled up (folded back). For example, when the outer clothes (trousers, etc.) of the diaper 2 are taken off, a force F (hereinafter, also referred to as “dragging force F”) in the direction of sliding the diaper 2 is applied to the ventral end portion 2f of the diaper 2 or the like. When the dorsal end 2r is greatly rolled up, the contact area with the outer garment increases, which causes the diaper 2 to slip off.

Further, when the soft region 3 and the middle region 5, which are softer than the hard region 4, are curled around an axis along the width direction, for example, the thickness of this portion increases, so that the elastic member of the outer garment, the belt, or the like can be used. The pressure may cause pressure on the wearer's abdomen or bite into it, which may give the wearer a sense of discomfort. As a result, the wearer (particularly an infant or an infant) may voluntarily shift the diaper 2 from the proper wearing position.

On the other hand, in the diaper 2, the hard region 4 on the inseam 2C side of the soft region 3 is harder than the soft region 3, so that it is difficult to move and is easily held along the wearer's skin.
Further, since the middle region 5 between the soft region 3 and the hard region 4 is harder than the soft region 3, it is less likely to be rolled up than the soft region 3, and an increase in the contact area with outer clothing can be suppressed. Further, since the middle region 5 is softer than the hard region 4, the drag force F can be released (removed) when the middle region 5 is folded outward from the hard region 4 as shown in FIG. 6 (b).
In this way, in the diaper 2, the soft region 3 and the middle region 5 are folded back stepwise (two steps in the present embodiment) to suppress large curling and misalignment of the ventral end 2f and the dorsal end 2r. can. Therefore, it is possible to prevent the diaper 2 from slipping off.

Further, according to the middle recess 6C extending in the longitudinal direction in the middle region 5 to form a beam structure, it is possible to effectively suppress the curling and curling of the middle region 5 as described above. By suppressing the curling of the middle region 5, the increase in the contact area with the outer garment is further suppressed, so that the diaper 2 can be further suppressed from slipping off. Further, since the middle region 5 is easily folded back from the hard region 4 by suppressing the rounding, the drag force F can be released more appropriately. In this way, the middle region 5 is bent with respect to the hard region 4 without curling, so that the diaper 2 can be further suppressed from slipping off.

By the way, a wearer who is an infant or an infant may unintentionally turn the soft region 3 or the middle region 5 by hand. On the other hand, in the diaper 2, the drag force F is released by the stepwise folding back of the soft region 3 and the middle region 5 as described above, and the hard region 4 is maintained in a state along the wearer's skin. Therefore, even when the wearer unintentionally turns the soft region 3 or the middle region 5, the slip-off can be suppressed.
Although the front body 2A is illustrated in FIGS. 6 (a) and 6 (b), the same action and effect can be obtained with the back body 2B.

(2) The top sheet 22 extending on the skin-side surface of the diaper 2 and the cover sheet 25 extending on the non-skin-side surface of the diaper 2 are laminated in the soft region 3, and the middle region 5 is laminated. In addition to these sheets 22 and 25, a back sheet 24 having liquid impermeable property is laminated. In this way, by making the number of laminated sheets 22, 24, 25 normally equipped in the diaper 2 different between the soft region 3 and the middle region 5, the middle region 5 can be made harder than the soft region 3. Therefore, it is possible to suppress the complexity of the configuration of the diaper 2 and also to suppress the cost.

(3) Since a sheet-shaped functional material having a predetermined function (target sheet 26 or elastic member 9 in this embodiment) is provided in the hard region 4, the functional material that gives the diaper 2 a predetermined function is used. Therefore, the hard region 4 can be made harder than the soft region 3 and the middle region 5. This also makes it possible to suppress the complexity of the configuration of the diaper 2 and also to reduce the cost.

(4) Since the functional material provided in the rear hard region 4B is an elastic member 9 that elastically deforms in the width direction to form a waist gather 29, the elastic member 9 of the waist gather 29 normally equipped in the diaper 2 is used. Therefore, the hard region 4 can be made harder than the soft region 3 and the middle region 5. Therefore, as described above, the complexity of the configuration of the diaper 2 can be suppressed and the cost can be suppressed.

(5) Since the functional material provided in the front hard region 4A is the target sheet 26 to which the tape 1 is fastened, the target sheet 26 normally equipped in the tape-type diaper 2 is used to use the front soft region 3A. And the front hard region 4A can be made harder than the front middle region 5A. Therefore, as described above, the complexity of the configuration of the diaper 2 can be suppressed and the cost can be suppressed.

(6) Since the cover sheet 25 extends in a plane shape over the front middle region 5A and the front hard region 4A, the cover sheet 25 has a stepped shape in these regions 5A and 4A. It is possible to prevent the outer clothes that come into contact from getting caught. As a result, the cover sheet 25 is prevented from being dragged by raising and lowering the outer clothes, so that the diaper 2 can be prevented from being displaced or slipped off. Further, when the cover sheet 25 extends in a plane from the front soft region 3A to the front hard region 4A as in the present embodiment, the diaper is further suppressed from being caught by the outer clothes in contact with the cover sheet 25. It is possible to further suppress the misalignment and slipping of 2.

(7) According to the soft recess 6A extending in the longitudinal direction in the soft region 3 to form a beam structure, curling or curling of the soft region 3 can be effectively suppressed. By suppressing the curling of the soft region 3, the increase in the contact area with the outer garment is further suppressed, so that the diaper 2 can be further suppressed from slipping off. Further, by suppressing the rounding of the soft region 3, the soft region 3 can be easily folded back from the middle region 5 appropriately, and the rounding of the middle region 5 adjacent to the soft region 3 is also suppressed, so that the middle region 5 is suppressed. It becomes easier to fold back more appropriately from the hard region 4. From these, the drag force F can be released more appropriately. By bending the soft region 3 and the middle region 5 without curling in this way, it is possible to further suppress the slipping off of the diaper 2.

According to the recess 6 extending over the soft region 3, the middle region 5, and the hard region 4, it is possible to suppress bending along the width direction in the entire area of the soft region 3, the middle region 5, and the hard region 4. .. As a result, curling is suppressed in any of the soft region 3, the middle region 5, and the hard region 4, so that the diaper 2 can be further suppressed from slipping off due to an increase in the contact area with the outer garment.
Further, since the hard region 4 reinforced by the recess 6 is more likely to be held along the wearer's skin than the one without the recess 6, the misalignment of the diaper 2 can be further suppressed. This also makes it possible to further suppress the slipping of the diaper 2.

(8) As shown in FIG. 6A, when the soft region 3 is rolled outward as described above in the mounted state, the surface on the skin side faces the outside and the surface on the non-skin side faces the inside (skin). Turn to the side). In this respect, since the coefficient of friction of the soft region 3 is smaller on the surface on the skin side than on the surface on the non-skin side, the surface on the skin side facing outward faces inward when rolled outward as described above. It is slippery than the surface on the non-skin side. Therefore, it is possible to suppress the friction between the soft region 3 rolled outward and the clothes on the outside of the diaper 2. As a result, the dragging of the soft region 3 due to the raising and lowering of the outer clothes is suppressed, so that the misalignment and slipping of the diaper 2 can be further suppressed.

The same applies to the middle region 5. That is, as shown in FIG. 6 (b), when the middle region 5 is rolled outward as described above in the mounted state, the surface on the skin side faces the outside and the surface on the non-skin side faces the inside (skin side). Turn to. In this respect, since the coefficient of friction of the middle region 5 is smaller on the surface on the skin side than on the surface on the non-skin side, the surface on the skin side facing outward faces inward when rolled outward as described above. It is more slippery than the surface on the non-skin side. Therefore, it is possible to suppress the friction between the middle region 5 rolled outward and the clothes on the outside of the diaper 2. As a result, the dragging of the soft region 5 due to the raising and lowering of the outer clothes is suppressed, so that the misalignment and slipping of the diaper 2 can be further suppressed.

(9) By ensuring the dimension in the longitudinal direction in each of the soft region 3 and the middle region 5 to be 5 mm or more, the soft region 3 and the middle region 5 are likely to be folded in a stepwise manner. Can be realized more appropriately. By such a folding mode, large curling and misalignment of the ventral end 2f and the dorsal end 2r of the diaper 2 are reliably suppressed, so that the diaper 2 can be reliably suppressed from slipping off.
Further, each of the soft region 3 and the medium region 5 has a dimension in the longitudinal direction of 15 mm or less, so that the contact area with the outer garment can be suppressed. As a result, the dragging of the soft region 3 and the middle region 5 due to the raising and lowering of the outer clothes is suppressed, so that the misalignment and slipping of the diaper 2 can be further suppressed.

(10) By suppressing the total dimension in the longitudinal direction in the soft region 3 and the middle region 5 to 25 mm or less, it is possible to suppress the integral curling of the soft region 3 and the middle region 5. As a result, the certainty of the above-mentioned two-step folding can be enhanced. Therefore, it is possible to further suppress the slipping of the diaper 2.

(11) Since three types of areas 3 to 5 are provided in each of the front body 2A and the back body 2B, the diaper 2 slips off while improving the air permeability as described above in both the front body 2A and the back body 2B. Can be suppressed. Therefore, as compared with the case where the three types of regions 3 to 5 are provided in only one of the front body 2A and the back body 2B, the air permeability of the diaper 2 can be further enhanced and the slip-off can be further suppressed.

(12) Since the mat-shaped absorber 21 having a liquid absorbing property is provided in the front hard region 4A, the front soft region 3A and the front middle region 5A are provided by using the absorber 21 normally equipped in the diaper 2. It can be made harder by bulking the front hardened region 4A in the thickness direction. Therefore, it is possible to suppress the complexity of the configuration of the diaper 2 and also to suppress the cost.

(13) Since the concave portion 6 extending in the longitudinal direction is provided on the skin-side surface of the soft region 3, the longitudinal direction is along the skin-side surface of the soft region 3 as compared with the case where the concave portion 6 is not provided. Friction with the moving object can be reduced. Therefore, when the soft region 3 is rolled outward as described above in the mounted state, the movement of the outer garment along the longitudinal direction can be facilitated by the recess 6. As a result, the dragging of the soft region 3 due to the raising and lowering of the outer garment is suppressed, so that the diaper 2 can be suppressed from being displaced or slipped off.

Similarly, since the recess 6 extending in the longitudinal direction is provided on the skin-side surface of the middle region 5, the longitudinal direction is along the skin-side surface of the middle region 5 as compared with the case where the recess 6 is not provided. Friction with the moving object can be reduced. Therefore, when the middle region 5 is rolled outward as described above in the mounted state, the movement of the outer garment along the longitudinal direction can be facilitated by the recess 6. As a result, the dragging of the middle region 5 due to the raising and lowering of the outer clothes is suppressed, so that the misalignment and slipping of the diaper 2 can be suppressed.

[3. Modification example]
[3-1. First modification]
The configuration of the front body 2A described above is an example. Instead of the front body 2A described above, the front body 2A'shown in FIG. 7 may be applied. The front body 2A'according to the present modification differs from the above-mentioned front body 2A in the shapes of the top sheet 22 and the cover sheet 25 in the thickness direction, and other points are common. In FIGS. 7 and 8 and 9 described later, the same or corresponding elements as those described in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 7, in the front body 2A'of this modification, the top sheet 22 extends in a plane over the front soft region 3A, the front middle region 5A, and the front hard region 4A, and the cover sheet 25 extends in the front soft region. From the region 3A to the anterior hard region 4A, it forms a stepped shape that rises toward the non-skin side. The cover sheet 25 provided on the front body 2A'forms a stepped shape that rises toward the non-skin side from the front soft region 3A to the front middle region 5A according to the thickness dimension of the back sheet 24, and the front middle region 5A to the front. Over the hard region 4A, a stepped shape is formed on the non-skin side according to the thickness dimension of the absorber 21.
As described above, in the front body 2A', the cover sheet 25 on the non-skin side is stepped in the thickness direction according to the difference in the number of components in the thickness direction in the three regions 3A, 4A, and 5A. It is formed. That is, in the front body 2A'of this modification, the top sheet 22 on the skin side is flat, whereas the cover sheet 25 on the non-skin side is uneven.

When the top sheet 22 in contact with the wearer's skin extends in a plane as described above, it is possible to reduce stress on the wearer's skin in the wearing state as compared with the case where the top sheet 22 has a stepped shape.
On the other hand, when the top sheet 22 on the skin side extends in a plane on the front body 2A'in this way, the non-skin side responds to the difference in the number of components in the thickness direction in the three regions 3A, 4A, and 5A. The cover sheet 25 is uneven. When the cover sheet 25 in contact with the outer garment has a stepped shape as described above, the outer garment is more likely to be caught on the cover sheet 25 as compared with the case where the cover sheet 25 extends in a flat shape. The cover sheet 25 is easily dragged as the clothes are raised and lowered.

On the other hand, since the front body 2A'of this modification is provided with the above three regions 3A, 4A, and 5A, it is before being held along the wearer's skin as in the above embodiment. The hard region 4A, the anterior soft region 3A and the anterior middle region 5A that are gradually folded back can suppress large curling and misalignment of the ventral end portion 2f. Therefore, even if the cover sheet 25 is dragged by raising and lowering the outer clothes, it is possible to suppress the misalignment and slipping of the diaper.

In the front middle region 5A in the front body 2A'of this modification, the dimension L2'in the longitudinal direction is larger than the thickness dimension T in the front hard region 4A (L2'> T) from the viewpoint of appropriately setting the folding mode. As a result, as shown in FIG. 8, when the anterior middle region 5A is folded outward from the anterior hard region 4A, the anterior soft region 3A is outward from the anterior rigid region 4A (absorbent body 21 or target sheet 26). It is arranged so that it is easy to follow the outside of the front hard region 4A. Therefore, the rounding of the anterior soft region 3A and the anterior middle region 5A can be more reliably suppressed.

The dimension L2'in the longitudinal direction of the front middle region 5A is preferably three times or less (L2'≤ 3 × T) the thickness dimension T of the front hard region 4A, and more preferably the thickness of the front hard region 4A. It is set to be twice or less (L2'≤2 × T) of the dimension T. When the thickness dimensions of the sheets 22 to 26 and the absorber 21 are general values, the dimensions L2 ′ satisfying the above inequality (T <L2 ′ ≦ 2 × T) are 5 mm or more and 15 mm or less.

If the dimension L2'in the longitudinal direction of the front middle region 5A is set to be equal to or less than the above upper limit value, bending or curling in the front middle region 5A can be suppressed. Therefore, the front middle region 5A can be folded back more appropriately with respect to the front hard region 4A.
In addition, according to the diaper to which the front body 2A'of this modification is applied, the same action and effect can be obtained from the same configuration as the above embodiment.

[3-2. Second variant]
As shown in FIGS. 9A and 9B, the above areas 3 to 5 may be applied to the pants-type diaper 2'. Here, the same or corresponding elements as those described in the above-described embodiment are designated by the same reference numerals, and duplicate description will be omitted.
The diaper 2'of this modification includes an annular waist circumference portion 2D in which both ends of the front body 2A and the rear body 2B in the width direction are connected to each other. The dorsal end 2r and ventral end 2f of the diaper 2'correspond to the annular edge of the waistline 2D. The diaper 2'is in a deployed state in a state where the front body 2A and the rear body 2B are disconnected at both ends in the width direction and spread out in a plane.

As shown in FIG. 9A, the anterior soft region 3A of this modified example is provided with a ventral surface material 11 forming at least a non-skin side surface in the anterior body 2A. Further, the front middle region 5A is provided with a back sheet 24 in addition to the ventral surface material 11, and the front hard region 4A is provided with a waist gather 29 in addition to the ventral surface material 11 and the back sheet 24. Has been done.
The waist gather 29 of this modification is formed by wrinkling the ventral surface material 11 and the back sheet 24 in the width direction by a thread-like elastic member 9 that elastically deforms in the width direction. The waist gather 29 is provided over the entire circumference of the waist circumference portion 2D.

As shown in FIG. 9B, the posterior soft region 3B, the posterior middle region 5B, and the posterior hard region 4B of this modification are similarly configured as the anterior soft region 3A, the anterior middle region 5A, and the anterior hard region 4A, respectively. ing. Specifically, the back soft region 3B is provided with the dorsal surface material 12 forming at least the non-skin side surface in the back body 2B, and the back middle region 5B is provided with the dorsal surface material 12 in addition to the back surface material 12. A back sheet 24 is provided, and a waist gather 29 is provided in the rear hard region 4B in addition to the dorsal surface material 12 and the back sheet 24.

The diaper 2'of this modification also provides three types of regions 3 to 5 that gradually become harder from the ventral end 2f or the dorsal end 2r toward the inseam 2C side. Similarly, it is possible to suppress slipping while increasing the air permeability. In addition, according to the diaper 2'of this modification, the same action and effect can be obtained from the same configuration as the above embodiment.

[3-3. others]
The configurations of the regions 3 to 5 are not limited to those shown in the above-described embodiments and modifications. The regions 3 to 5 may be gradually hardened as described above, and for example, the hardness may be adjusted according to the material and the thickness dimension of the components regardless of the number of stacked components. Further, in the tape-type diaper 2 shown in the embodiment, the regions 3 to 5 may be similarly configured by the front body 2A and the back body 2B. That is, the configuration of the three regions 3A, 4A, 5A provided in the front body 2A may be applied to the back body 2B, or the three regions 3B, 4B, 5B provided in the rear body 2B may be applied. The configuration of may be applied to the front body 2A. Alternatively, the configurations of the three regions 3 to 5 may be exchanged between the front body 2A and the back body 2B described above. The front body 2A'shown in the above modification may be applied to the rear body 2B.

The recess 6 provided in the top sheet 22 is an example of a reinforcing portion that extends in the longitudinal direction and is reinforced more than other portions. The reinforcing portion may be formed of a groove (emboss) provided in the cover sheet 25 in place of (or in addition to) the recess 6 described above. Further, the reinforcing portion may be provided only in the middle region 5. That is, in the above embodiment, the soft recess 6A and the hard recess 6B may be omitted, and only the middle recess 6C may be provided.
The above dimensions L1 to L4, La, Lb with respect to the soft region 3 and the middle region 5 may have values outside the above range.

The middle region 5 may be configured to be gradually hardened from the soft region 3 toward the hard region 4. Further, the diapers 2 and 2'may further include a region harder than the hard region 4 on the inseam 2C side of the hard region 4. That is, the diapers 2, 2'may be configured to become harder in multiple stages from the ventral end 2f or the dorsal end 2r toward the inseam 2C side. In this case, as described above, the flexibility of the soft region 3 enhances the air permeability, but the regions other than the soft region 3 are folded back in multiple stages, so that the ventral end 2f and the dorsal end 2r are large. Since curling and misalignment are further suppressed, slip-off can be further suppressed.
The deformation modes shown in FIGS. 6 (a) and 6 (b) and FIG. 8 are all examples.

1 Tape (fastening tape)
2,2'Diaper 2A, 2A' Front body 2B Back body 2C Inseam 2D Waist end 2f Dorsal end 2r Dorsal end 3 Soft area 3A Front soft area 3B Rear soft area 4 Hard area 4A Front hard area 4B Rear Hard region 5 Middle region 5A Front middle region 5B Rear middle region 6 Recess (reinforcing part)
6A Soft recess (second reinforcing part)
6B hard recess 6C middle recess (first reinforcement)
7 Elastic member 8 Elastic member 9 Elastic member (functional material)
11 Ventral surface material 12 Dorsal surface material 21 Absorber 21a Abdominal end 2f side edge of absorber 21 Top sheet (surface sheet)
23 Side seat 24 Back seat 25 Cover seat (front seat)
26 Target sheet (functional material)
26a Ventral end of target sheet 26 2f side edge 27 Solid gather 28 Leg gather 29 Waist gather F Drag force L1 Longitudinal dimension L2 of front soft region 3A L2, L2 ′ Longitudinal dimension L3 of front middle region 5A Longitudinal dimension of the posterior soft region 3B L4 Longitudinal dimension of the posterior middle region 5B La Total longitudinal dimension of the anterior soft region 3A and the anterior middle region 5A Lb In the longitudinal direction of the posterior soft region 3B and the posterior middle region 5B Total dimensions O Center line in the width direction T Thickness dimension of front hard region 4A

Claims (12)

A soft region extending in the width direction, including the ventral or dorsal end,
A hard region provided on the inseam side of the soft region and harder than the soft region,
It comprises a middle region that extends between the soft region and the hard region and extends in the width direction, and is harder than the soft region and softer than the hard region.
The diaper is characterized in that a first reinforcing portion extending in the longitudinal direction and being reinforced more than other portions to form a beam structure is provided in the middle region. A surface sheet extending on each of the skin-side surface and the non-skin-side surface is laminated on the soft region.
The diaper according to claim 1, wherein a liquid-impermeable back sheet is laminated in the middle region in addition to the surface sheet. The diaper according to claim 1 or 2, wherein a sheet-shaped functional material having a predetermined function is provided in the hard region. The diaper according to claim 3, wherein the functional material is an elastic member that elastically deforms in the width direction to form waist gathers. Provided with fastening tapes provided on both sides in the width direction on one of the front body and the back body and fastened to the other of the front body and the back body.
The diaper according to claim 3 or 4, wherein the functional material is a target sheet to which the fastening tape is fastened. In the middle region, a skin surface sheet extending on the surface on the skin side and a non-skin surface sheet extending on the surface on the non-skin side are laminated.
In the hard region, in addition to the skin surface sheet and the non-skin surface sheet, an absorber having a thickness larger than that of the skin surface sheet and the non-skin surface sheet is formed on the skin surface sheet and the non-skin surface sheet. Stacked between
The non-skin surface sheet extends in a plane over the middle region and the hard region.
The method according to any one of claims 1 to 5, wherein the skin surface sheet has a stepped shape that is raised toward the skin side from the middle region to the hard region according to the thickness dimension of the absorber. Diapers. In the middle region, a skin surface sheet extending on the surface on the skin side and a non-skin surface sheet extending on the surface on the non-skin side are laminated.
In the hard region, in addition to the skin surface sheet and the non-skin surface sheet, an absorber having a thickness larger than that of the skin surface sheet and the non-skin surface sheet is formed on the skin surface sheet and the non-skin surface sheet. Stacked between
The skin surface sheet extends in a plane over the middle region and the hard region.
One of claims 1 to 5, wherein the non-skin surface sheet has a stepped shape that rises toward the non-skin side from the middle region to the hard region according to the thickness dimension of the absorber. The diapers listed in. The invention according to any one of claims 1 to 7, wherein the soft region is provided with a second reinforcing portion extending in the longitudinal direction and being reinforced more than the other portions to form a beam structure. Diapers. The diaper according to any one of claims 1 to 8, wherein at least one of the soft region and the middle region has a smaller coefficient of friction on the surface on the skin side than on the surface on the non-skin side. The diaper according to any one of claims 1 to 9, wherein each of the soft region and the medium region has a lengthwise dimension of 5 mm or more and 15 mm or less. The diaper according to any one of claims 1 to 10, wherein the soft region and the middle region have a total lengthwise dimension of 25 mm or less. The diaper according to any one of claims 1 to 11, wherein the soft region, the hard region, and the middle region are provided in each of the front body and the back body.

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