CN204468454U - Disposable urine napkin - Google Patents

Abstract

The utility model provides a disposable diaper, which has excellent surface gap maintenance and is easy to manufacture. The above-mentioned problems are solved by a disposable diaper characterized in that, in the lower layer absorbent body (23B), at least in the widthwise central portion of the crotch portion (C2), an elongated lower layer penetrating through in the thickness direction The portion (60) extends in the front-rear direction, and an upper layer penetration portion (50) penetrating in the thickness direction is provided at least in the range of the front-rear direction corresponding to the lower layer penetration portion (60) in the upper layer absorbent body (23A). The part (50) has an elongated middle part (51) located above the lower through part (60) and extending in the front-rear direction, and an expansion part ( 52) The side edge of the expanded portion (52) is shaped such that at least a part of the front side is located on the outside in the width direction as it goes to the rear side.

Description

disposable diapers

technical field

The utility model relates to a disposable diaper with excellent leak-proof performance.

Background technique

Disposable diapers leak in various ways, and one of them is urine anterior leakage when the wearer is male (leakage from the front side of the disposable diaper, hereinafter referred to as male anterior leakage). When the wearer is a woman, male anterior leakage will not occur. However, when the wearer is a man, even if other conditions are the same, it will occur. The rear scrotum is attached to the surface of the disposable diaper so that the gap is extremely small, thereby hindering the backward movement of urine.

In addition, according to the later studies of the present inventors, regardless of men and women, in the case of a large amount of urination at one time or in the case of a small amount of urination many times, it is too late for urine to be absorbed, and the urine moves on the surface of the disposable diaper. On the contrary, the gap between the surface of the crotch part of the disposable diaper and the body surface (hereinafter referred to as the surface gap) is small, so it is difficult for urine to diffuse backward and it is easy to generate a gap. Tendency to leak around the base of the thigh.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2013-135716

[Patent Document 2] Japanese Unexamined Patent Publication No. 2013-135717

[Patent Document 3] Japanese Unexamined Patent Publication No. 2011-104021

[Patent Document 4] Japanese Patent Laid-Open No. 2011-125537

As a solution to the leakage caused by such a small surface gap, the proposals described in Patent Documents 1 and 2 of the present applicant are effective for both men and women. In terms of maintainability, the method described in Patent Document 2 has room for improvement in terms of ease of manufacture.

Utility model content

Therefore, the main subject of this invention is providing the disposable diaper which is excellent in the maintenance property of a surface gap, and is easy to manufacture.

The present invention that solves the above-mentioned problems is as follows.

<Utility model described in claim 1>

A disposable diaper having a crotch portion and a rear portion extending behind the crotch portion, and having an absorbent body for absorbing urine from the crotch portion to the rear portion, characterized in that,

The absorber has at least one of a penetrating portion penetrating in the thickness direction and a thinned portion at a center portion in the width direction of the crotch portion having a surface depression forming region,

The surface depression forming region has: an elongated first depression forming portion extending in the front-rear direction; and a second depression forming portion extending toward the middle position or rear side of the first depression forming portion in the front-rear direction. Expanding on both sides of the direction,

The second dent forming portion is the thinned portion, and the first dent forming portion is a penetrating portion penetrating in a thickness direction or a thinner portion thinner than the second dent forming portion.

(Effect)

In the present invention, in the wearing state, when the disposable diaper is sandwiched between the legs and becomes compressed in the width direction, the surface depression forming area is sequentially drawn from the center in the width direction toward the outside of the diaper. The way it is pressed deforms, forming depressions in the surface of the diaper. At this time, in the surface depression forming region, the width of the portion composed of the first depression forming portion and the second depression forming portion is larger than the portion composed of only the first depression forming portion by the amount of the second depression forming portion, Thus, a depression having a larger width is formed. In addition, since the thinned portion ensures a certain degree of rigidity in the wide recessed portion, it is excellent in maintaining the shape and depth of the recess, and maintaining the surface gap. During urination, among the urine excreted into the concave area and its front side, the part that is not absorbed and moves on the surface flows to the back side through the large surface gap as a flow path, and is absorbed by the back side during this process. Absorbent absorbs. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem. In addition, it is known that providing front-rear direction slits in the absorber can improve diffusibility in the front-back direction, but the present invention has the following different effects compared with such known diffusion-improving techniques.

<Utility model described in claim 2>

In the disposable diaper according to claim 1, the absorber has a single-layer structure.

(Effect)

Even if the absorber has a single-layer structure, the above-mentioned effect can be exhibited by providing the dent forming region of the present invention.

<Utility model described in claim 3>

In the disposable diaper according to claim 1, the absorber is formed by laminating a plurality of absorber layers.

(Effect)

Even if the absorber has a multilayer structure, the above effects can be exhibited by providing the dent forming region of the present invention.

<Utility model described in claim 4>

A disposable diaper having a crotch portion and a rear portion extending behind the crotch portion, and having an absorbent body for absorbing urine from the crotch portion to the rear portion, characterized in that,

As the absorbent body, the disposable diaper has a lower layer absorbent body and an upper layer absorbent body disposed above the lower layer absorbent body,

In the lower layer absorbent body, at least in the widthwise central portion of the crotch portion, the elongated lower layer penetration portion penetrating in the thickness direction extends in the front-rear direction,

In the upper layer absorbent body, an upper layer penetration portion penetrating in a thickness direction is provided at least in a front-rear direction range corresponding to the lower layer penetration portion,

The upper through-part has: an elongated middle part located above the lower through-part and extending in the front-rear direction; side extensions.

(Effect)

The utility model described in this item relates to the application mode when the absorber is set as a two-layer structure. In the absorbent body of the two-layer structure described in this item, there is no absorbent body in the overlapped portion of the middle portion of the lower layer penetration portion and the upper layer penetration portion, and the portion where the upper layer penetration portion expands becomes a single layer structure of the lower layer absorbent body, The outer side of the expanded portion of the upper layer penetration portion forms a two-layer structure of the upper layer absorbent body and the lower layer absorbent body. In the worn state, when the disposable diaper is sandwiched between the legs and compressed in the width direction, there is no absorbent body in the overlapped portion of the middle part of the lower through-part and the upper through-part, so each through-part Both side edges are approached according to the amount of compression. At this time, although force also acts on the single-layer structure portion located at the expanded portion of the upper-layer penetration portion in directions approaching each other, the single-layer structure portion easily expands along the upper-layer penetration portion that is the boundary with the two-layer structure portion. The side edge of the part is bent inward, so that the single-layer structure part is bent inward relative to the two-layer structure part on the outside in the width direction, and the non-absorbent part between the single-layer structure parts is bent inward. The inner side is concave, and a wide depression is formed on the surface of the disposable diaper.

Moreover, such a depression is not only easy to recover from compression in the width direction, but also the single-layer structure part bent inward becomes a wall to maintain the depth of the depression, so the maintenance of the depression and even the maintenance of the surface gap is excellent. Therefore, in the utility model described in this item, when urinating, among the urine excreted to the front side of the recessed area, the part that is not absorbed and moves on the surface flows to the urine through the large surface gap as a flow path. The rear side, which is absorbed by the absorbent body on the rear side in the process. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem. In addition, it is known that providing front-rear direction slits in the absorber can improve diffusibility in the front-back direction, but the present invention has the following different effects compared with such known diffusion-improving techniques.

In addition, since the absorber has a two-layer structure and the penetrating portions in the thickness direction are established as manufacturing techniques, it can be easily manufactured only by changing its shape or positional relationship.

<The utility model described in claim 5>

In the disposable diaper described in technical scheme 4,

The middle portion of the upper layer penetration portion extends to the front end of the upper layer absorbent body and opens at the front end of the upper layer absorbent body,

The front end of the upper layer absorbent body is positioned at the same position as the front end of the lower layer penetration portion or located behind it.

(Effect)

For the upper layer penetrating portion, the front end of the upper layer absorbent body is arranged to penetrate the front end of the upper layer absorbent body and the front end of the lower layer absorbent body is positioned at the same position or on the rear side thereof. When compressed, the closer to the front side of the upper layer absorbent body and the closer to the front side of the upper layer penetration portion, the easier it is to be compressed, and as a result, the above-mentioned dents are easier to form.

<The utility model described in claim 6>

In the disposable diaper according to claim 4 or 5, the lower layer penetration portion is provided in the middle of the lower layer absorbent body in the front-rear direction.

(Effect)

Rigidity as a whole of the absorber can be ensured by setting it as an arrangement|positioning which the lower layer penetration part does not penetrate front and back of the lower layer absorber.

<Utility model described in claim 7>

In the disposable diaper according to claim 4 or 5, a diffusion sheet for promoting diffusion of urine in the front-rear direction is provided at the bottom of the lower layer penetration portion.

(Effect)

By having such a diffusion sheet, it is possible to promote the diffusion of urine in the front-rear direction through the lower layer penetration portion.

<The utility model described in claim 8>

A disposable diaper having a crotch portion and a rear portion extending behind the crotch portion, and having an absorbent body for absorbing urine from the crotch portion to the rear portion, characterized in that,

As the absorbent body, the disposable diaper has a lower layer absorbent body and an upper layer absorbent body disposed above the lower layer absorbent body,

In the lower layer absorbent body, at least in the widthwise central portion of the crotch portion, the elongated lower layer thinning portion extends in the front-rear direction,

In the upper layer absorbent body, an upper layer penetration portion penetrating in a thickness direction is provided at least in a front-rear direction range corresponding to the lower layer thinned portion,

The upper layer penetration part has: an elongated middle part, which is located above the lower layer thinned part, and extends in the front-rear direction; Extended on both sides.

(Effect)

Instead of the penetrating portion of the lower layer absorbent body of the utility model described in claim 4, the thinned portion as described in this item can also bring about the same advantages. That is, in the absorber of the two-layer structure described in this item, the overlapped part of the middle part of the lower layer thinning part and the upper layer penetration part forms a single layer structure of the lower layer thinning part, and the part where the upper layer penetration part expands becomes the lower layer. In the case of a single-layer structure other than the thinned portion of the absorber, the outer side of the expanded portion of the upper layer penetration portion becomes a two-layer structure of the upper layer absorber and the lower layer absorber. Under the worn state, when the disposable diaper is sandwiched between the legs and is compressed in the width direction, although the force also acts on the single-layer structure part located at the expanded part of the upper layer penetration part in the direction approaching each other, , the single-layer structure portion is easily bent inward along the side edge of the extended portion of the upper penetration portion as the boundary with the two-layer structure portion, whereby the single-layer structure portion is The single-layer structure part is bent inward, and the part between the single-layer structure part is dented inward accordingly, forming a wide depression on the surface of the disposable diaper.

Moreover, such a depression is not only easy to recover from compression in the width direction, but also the single-layer structure part bent inward serves as a wall to maintain the depth of the depression. Therefore, the maintenance of the depression and even the maintenance of the surface gap is excellent. Therefore, in the utility model described in this item, when urinating, among the urine excreted to the front side of the recessed area, the part that is not absorbed and moves on the surface flows to the urine through the large surface gap as a flow path. The rear side, which is absorbed by the absorbent body on the rear side in the process. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem. In addition, it is known that providing front-rear direction slits in the absorber can improve the diffusivity in the front-rear direction, but the present invention has the following different effects compared with such known diffusion-enhancing techniques.

In addition, since the absorber has a two-layer structure and the penetrating portions in the thickness direction are established as manufacturing techniques, it can be easily manufactured only by changing its shape or positional relationship.

<The utility model described in claim 9>

In the disposable diaper described in technical solution 8,

The middle portion of the upper layer penetration portion extends to the front end of the upper layer absorbent body and opens at the front end of the upper layer absorbent body,

The front end of the upper layer absorbent body is positioned at the same position as the front end of the lower layer thinned portion or located behind it.

(Effect)

For the upper layer penetrating portion, the front end of the upper layer absorbent body is arranged to penetrate the front end of the upper layer absorbent body and the front end of the lower layer absorbent body is positioned at the same position or on the rear side thereof. When compressed, the closer to the front side of the upper layer absorbent body and the closer to the front side of the upper layer penetration portion, the easier it is to be compressed, and as a result, the above-mentioned dents are easier to form.

<The utility model described in claim 10>

In the disposable diaper according to claim 8 or 9, the lower layer thinning portion is provided in the middle of the lower layer absorbent body in the front-rear direction.

(Effect)

Rigidity as a whole of the absorber can be ensured by setting it as an arrangement|positioning which the lower layer thinning part does not penetrate to the front and back of a lower layer absorber.

<The utility model described in claim 11>

In the disposable diaper described in any one of technical solutions 4, 5, 8, 9,

The protruding portion protruding from the side of the upper layer penetration portion extends in the front-rear direction, and the portions located on the front side and the rear side of the protruding portion respectively become non-rising portions fixed in a fallen state, and one of these non-rising portions The part in between becomes a non-fixed standing part, and, on both sides in the width direction of the surface, there are three-dimensional gathers between the crotch fixed to the standing part under the condition that the fold elastic elastic member is stretched in the front-back direction,

The expansion part is located between the non-rising parts of the three-dimensional gathers of the crotch part in the front-rear direction.

(Effect)

By having such three-dimensional gathers in the crotch portion, the contraction force of the pleated elastic elastic member of the three-dimensional gathers in the crotch effectively acts on the single-layer structure portion, thereby promoting the formation of the above-mentioned dents, and improving the shape retention of the dents. In addition, the single-layer structure part located in the extended part of the upper penetration part is a part of the wall of the depression, including the part between them, which is a part where the absorption capacity of the absorber is small and urine is easy to move. The three-dimensional folds between the crotch are set on both sides, which can also prevent the so-called horizontal leakage.

<The utility model described in claim 12>

A disposable diaper having a crotch portion and a rear portion extending behind the crotch portion, and having an absorbent body for absorbing urine from the crotch portion to the rear portion, characterized in that,

As the absorbent body, the disposable diaper has an upper layer absorbent body and a lower layer absorbent body disposed below the upper layer absorbent body,

In the upper absorbent body, at least at the center portion in the width direction of the crotch portion, the elongated upper layer penetration portion or the upper layer thinned portion extending in the front-rear direction, penetrating in the thickness direction,

In the lower layer absorbent body, a lower layer penetration portion penetrating in a thickness direction is provided at least in a front-rear direction range corresponding to the upper layer penetration portion or the upper layer thinned portion,

The lower penetration portion has: an elongated middle portion located below the upper penetration portion or the upper thinned portion and extending in the front-rear direction; The position expands on both sides in the width direction.

(Effect)

The same advantages can also be brought about by making the shapes of the upper penetration portion and the lower penetration portion described in Claim 4 and the shapes of the upper penetration portion and the lower thinning portion described in Claim 7 reversed as described in this item. That is, in the absorber of the two-layer structure described in this item, the overlapped part of the intermediate portion between the upper layer through portion or the upper layer thinned portion and the lower layer through portion becomes a single layer structure without the absorber or the upper layer thinned portion, and the lower layer The expanded part of the penetrating part has a single-layer structure of the upper absorber or a single-layer structure other than the thinned part of the upper absorber, and the outer side of the expanded part of the lower penetrated part has a two-layer structure of the lower absorber and the upper absorber. Under the worn state, when the disposable diaper is sandwiched between the legs and is compressed in the width direction, although the force also acts on the single-layer structure part located at the expanded part of the lower through-section in the direction approaching each other, , the single-layer structure part is easily bent inward along the side edge of the expansion part of the lower layer penetration part as the boundary with the two-layer structure part, whereby the single-layer structure part is The single-layer structure part is bent inward, and the part between the single-layer structure part is dented inward accordingly, forming a wide depression on the surface of the disposable diaper.

Moreover, such a depression is not only easy to recover from compression in the width direction, but also the single-layer structure part bent inward serves as a wall to maintain the depth of the depression. Therefore, the maintenance of the depression and even the maintenance of the surface gap is excellent. Therefore, in the utility model described in this item, when urinating, among the urine excreted to the front side of the recessed area, the part that is not absorbed and moves on the surface flows to the urine through the large surface gap as a flow path. The rear side, which is absorbed by the absorbent body on the rear side in the process. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem. In addition, it is known that providing front-rear direction slits in the absorber can improve diffusibility in the front-back direction, but the present invention has the following different effects compared with such known diffusion-improving techniques.

In addition, since the absorber has a two-layer structure and the penetrating portions in the thickness direction are established as manufacturing techniques, it can be easily manufactured only by changing its shape or positional relationship.

<The utility model described in claim 13>

In the disposable diaper described in technical solution 12,

The protruding part protruding from the side of the lower layer penetration part extends in the front-rear direction, and the parts located on the front side and the rear side of the protruding part respectively become non-rising parts fixed in a fallen state. The part in between becomes a non-fixed standing part, and, on both sides in the width direction of the surface, there are three-dimensional gathers between the crotch fixed to the standing part under the condition that the fold elastic elastic member is stretched in the front-back direction,

The expansion part is located between the non-rising parts of the three-dimensional gathers of the crotch part in the front-rear direction.

(Effect)

By having such three-dimensional gathers in the crotch portion, the contraction force of the gather elastic elastic member of the three-dimensional gathers in the crotch effectively acts on the single-layer structure portion, thereby promoting the formation of the above-mentioned dents, and improving the shape retention of the dents. In addition, the single-layer structure part located in the expanded part of the lower layer penetration part is a part of the wall of the depression, including the part between them, which is a part where the absorption capacity of the absorbent body is small and urine is easy to move. The three-dimensional folds between the crotch are set on both sides, which can also prevent the so-called horizontal leakage.

<The utility model described in claim 14>

In the disposable diaper described in technical solution 12 or 13,

The middle portion of the lower layer penetration portion extends to the front end of the lower layer absorbent body and opens at the front end of the lower layer absorbent body,

The front end of the lower layer absorbent body is positioned at the same position as the front end of the upper layer penetration portion or the upper layer thinned portion or is located behind it.

(Effect)

For the lower layer penetrating portion, the front end of the lower layer absorbent body is configured to penetrate through the front end of the lower layer absorbent body and the front end of the lower layer absorbent body is positioned at the same position as or behind the front end of the upper layer absorbent body. When the top is compressed, the closer to the front side of the upper layer absorbent body and the closer to the front side of the upper layer penetration portion, the easier it is to be compressed, and as a result, the above-mentioned depressions are easier to form.

<The utility model described in claim 15>

In the disposable diaper according to claim 12 or 13, the upper layer penetration portion is provided in the middle of the upper layer absorbent body in the front-rear direction.

(Effect)

Rigidity as the whole absorber can be ensured by setting it as arrangement|positioning which the upper layer penetration part does not penetrate front and back of an upper layer absorber.

<The utility model described in claim 16>

In the disposable diaper according to any one of Claims 4, 5, 8, 9, 12, and 13, at least a part of the side edge of the expanded portion is located in the width direction as it goes toward the rear side. outside shape.

(Effect)

When the side edge of the expanded part is in a shape in which at least a part of the front side is located on the outside in the width direction as it goes to the rear side (that is, on the right side, it faces obliquely rearward to the right, and on the left side, it faces obliquely rearward to the left). The width of the single-layer structure portion increases toward the rear side, whereby the single-layer structure portion is gradually bent inward relative to the two-layer structure portion on the outside in the width direction as it moves toward the rear side, and the single-layer structure portion The non-absorbent body portion between the structural portions is subsequently dented inward, forming a substantially boat-shaped depression on the surface of the disposable diaper. Such a boat-shaped depression is not only easy to recover from the compression in the width direction, but also the inwardly bent single-layer structure part serves as a wall to maintain the depth of the depression. Therefore, the maintenance of the boat-shaped depression and the maintenance of the surface gap are excellent.

<The utility model described in claim 17>

In the disposable diaper according to claim 16, the expanded portion has a trapezoidal shape with a boundary with the middle portion as a lower base.

(Effect)

When the expanded part has such a shape, it is preferable because it is easy to manufacture.

As described above, according to the present invention, advantages such as excellent maintenance of surface gaps and ease of manufacture can be brought about.

Description of drawings

Fig. 1 is a plan view showing the inner side of a pad-type disposable diaper in an unfolded state.

(a) of FIG. 2 is a top view showing a lower absorbent body, (b) is a top view showing an upper absorbent body, and (c) is a top view showing a stacked state of a lower absorbent body and an upper absorbent body.

Fig. 3 is a Y-Y sectional view of Fig. 1 .

(a) of Fig. 4 is a Z-Z sectional view of Fig. 1 , and (b) is an X-X sectional view.

Fig. 5 is a perspective view.

Fig. 6 is a perspective view of the wearing state.

Fig. 7 is a schematic cross-sectional view showing state changes before and after wearing.

Figure 8 is a photograph of the sample.

Fig. 9 is a schematic cross-sectional view showing state changes before and after wearing.

Fig. 10 is a plan view of main parts showing various shapes of the upper layer penetration portion.

(a) of FIG. 11 is a plan view showing the lower layer absorbent body, (b) is a plan view showing the upper layer absorbent body, and (c) is a plan view showing a stacked state of the lower layer absorbent body and the upper layer absorbent body.

(a) of FIG. 12 is a cross-sectional view corresponding to the Z-Z cross section of FIG. 1 , and (b) is a diagram corresponding to the X-X cross-section.

Fig. 13 is a plan view of various upper absorbent bodies.

14( a ) is a plan view showing the lower absorbent body, (b) is a plan view showing the upper layer absorbent body, and (c) is a plan view showing a stacked state of the lower layer absorbent body and the upper layer absorbent body.

(a) of FIG. 15 is a cross-sectional view corresponding to the Z-Z cross section of FIG. 1 , and (b) is a diagram corresponding to the X-X cross-section.

Fig. 16 is a schematic cross-sectional view showing state changes before and after wearing.

(a) of FIG. 17 is a plan view showing the lower layer absorbent body, (b) is a plan view showing the upper layer absorbent body, and (c) is a plan view showing a stacked state of the lower layer absorbent body and the upper layer absorbent body.

(a) of FIG. 18 is a cross-sectional view corresponding to the Z-Z cross section of FIG. 1 , and (b) is a diagram corresponding to the X-X cross-section.

Fig. 19 is a schematic cross-sectional view showing state changes before and after wearing.

(a) is a top view showing the lower absorbent body, (b) is a top view showing the upper absorbent body, and (c) is a top view showing a stacked state of the lower absorbent body and the upper absorbent body.

(a) of FIG. 21 is a cross-sectional view corresponding to the Z-Z cross section of FIG. 1 , and (b) is a diagram corresponding to the X-X cross-section.

Fig. 22 is a schematic cross-sectional view showing state changes before and after wearing.

Fig. 23 is a plan view showing the inner side of the pad-type disposable diaper in an unfolded state.

Fig. 24 is a plan view of the absorber.

(a) of FIG. 25 is a Z-Z sectional view of FIG. 23, and (b) is an X-X sectional view.

Fig. 26 is a schematic cross-sectional view showing state changes before and after wearing.

(a) of FIG. 27 is a cross-sectional view corresponding to the Z-Z cross section of FIG. 23 , and (b) is a diagram corresponding to the X-X cross-section.

Fig. 28 is a schematic cross-sectional view showing state changes before and after wearing.

Fig. 29 is a plan view showing various modified examples of the lower layer absorbent body.

Label description

B2...back side part; C1...scrotum placement area; C2... crotch part; F2... front side part; 21...liquid-impermeable sheet; 22...top sheet; 23...absorbent body; 23A...upper layer absorbent body; 23B... Lower absorbent body; 23n...Narrowed part; 23w...Single-layer structure part; 25...Middle sheet; 26...Outer sheet; 30...Side three-dimensional pleats; 31...Side three-dimensional pleats at the side; 33...Fold elastic stretch parts; 40 …Three-dimensional folds at the crotch; 42…Protruding part; 43…Fold elastic stretch parts; 50…Upper layer penetration; 51…Middle portion; Thin portion; 231...first dent forming part; 232...second dent forming part; 231, 232...surface dent forming region.

Detailed ways

Hereinafter, one Embodiment of this invention is demonstrated in detail with reference to the example of the pad-type disposable diaper shown in drawing.

1 to 6 show a pad-type disposable diaper 200 . This pad-type disposable diaper 200 has a crotch portion C2, a front portion F2 extending on both front and rear sides, and a rear portion B2. The size of each part can be appropriately determined. For example, the total length L (length in the front-rear direction) of the diaper is about 350 mm to 700 mm, and the overall width W1 of the diaper is about 130 mm to 400 mm. In this case, the length in the front-rear direction of the crotch portion C2 can be The length in the front-back direction of the front portion F2 is about 50 mm-350 mm, and the length in the front-back direction of the rear portion B2 is about 50 mm-350 mm. In addition, "the crotch part" refers to the part corresponding to the crotch part of the body during use, as shown in the illustration, depending on the product, it is the range from the center of the article in the front-rear direction or from its vicinity to a predetermined part on the front side, or The specified range in the center of the front-back direction of the item. As shown in the illustration, when there is a narrowed portion with a small width in the middle of the front-to-back direction of the article or the middle of the absorber in the front-to-back direction, the “crotch portion” means that the narrowest portion of the narrowed portion is the center in the front-to-back direction. The specified front-back direction range. In addition, the "front part (abdominal part)" means the part on the front side rather than the crotch part, and the "rear side part (dorsal part)" means the part behind the crotch part.

The pad-type disposable diaper 200 has a basic structure in which an absorbent body 23 is interposed between a liquid-impermeable sheet 21 and a liquid-permeable top sheet 22 . In addition, the dot-like pattern portion in the figure represents the bonding portion where the respective structural members are bonded, and is formed by a block, bead, curtain, peak, or spiral coating of a hot-melt adhesive or the like.

(Liquid-impermeable sheet/exterior sheet)

Inside the absorber 23 , the liquid-impermeable sheet 21 is provided so as to slightly protrude from the periphery of the absorber 23 . As the liquid-impermeable sheet 21, a polyethylene film or the like can be used, and a sheet having moisture permeability without impairing water blocking properties can also be used in terms of leak prevention. As for the water-repellent/moisture-permeable sheet, for example, a microporous sheet obtained by melting and mixing an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and passing a sheet along one or two axes obtained by extension.

In addition, the outer surface of the liquid-impermeable sheet 21 may be covered with the exterior sheet 26 made of nonwoven fabric, and in this case, the width of the liquid-impermeable sheet 21 may be approximately the same as the width of the absorber 23 . Various nonwoven fabrics can be used as the exterior sheet 26 . As the material fiber constituting the nonwoven fabric, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, and amides, regenerated fibers such as rayon and cupro, and natural fibers such as cotton can be used.

(Liquid Permeable Top Sheet)

The surface side of the absorber 23 is covered with the liquid-permeable top sheet 22 . In the illustrated form, a part of the absorber 23 protrudes from the side edge of the top sheet 22, but the width of the top sheet 22 may be enlarged so that the side edge of the absorber 23 does not protrude. As the top sheet 22, a porous or non-porous nonwoven fabric, a porous plastic sheet, or the like can be used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, and amides, regenerated fibers such as rayon and cupro, and natural fibers such as cotton can be used.

Desirably, the intermediate sheet 25 is interposed between the top sheet 22 and the absorber 23 . The middle sheet 25 is provided to prevent backflow of urine absorbed by the absorber 23, and it is desirable to use a material with low water retention and high liquid permeability, such as a nonwoven fabric or a mesh film. When setting the front end of the top sheet 22 as 0%, and the rear end of the top sheet 22 as 100%, it is preferable that the front end of the middle sheet 25 is in the range of 0% to 11%, and it is preferable that the rear end of the middle sheet 25 is in the range of 92% to 100%. range. In addition, it is preferable that the width 25w of the intermediate sheet 25 is about 50% to 90% of the width W2 of the absorber 23 .

(end flap/side flap)

At both ends of the pad-type disposable diaper 200 in the front-rear direction, the exterior sheet 26 and the liquid-permeable top sheet 22 are respectively extended and bonded to the front and rear sides of the absorber 23, so that the absorber 23 does not exist. The end flap EF. On both sides of the pad-type disposable diaper 200, the exterior sheet 26 extends outwards from the side edges of the absorber 23, and on the inner surface of the portion extending from the extension to the side of the top sheet 22, along the front and rear The outer portion 34 in the width direction of the side three-dimensional gather sheet 31 is adhered to the entire direction to form the side flap SF in which the absorber 23 does not exist. These bonded portions can be formed using hot melt adhesives, heat sealing, ultrasonic sealing. When the exterior sheet 26 is not provided, instead of the exterior sheet 26, the liquid-impermeable sheet 21 may be extended to the side flap part SF, and the outer surface side of the side flap part SF may be formed.

(side three-dimensional pleats)

On both sides of the surface, side three-dimensional folds 30 extending in the front-rear direction are respectively provided. The side three-dimensional gathers 30 are formed by the above-mentioned side three-dimensional gathers sheet 31 . The part 32 of the widthwise central side of the side three-dimensional gather sheet 31 extends to the top sheet 22, and at the end portion of the widthwise central side, along the front-to-back direction, utilizes a hot-melt adhesive or the like to fix the side in an extended state. The three-dimensional fold elastic telescopic part 33.

As the material of the side three-dimensional gather sheet 31, a plastic sheet or a melt-blown nonwoven fabric can be used, and a material obtained by subjecting a nonwoven fabric to water repellency with silicon or the like is suitably used in terms of the touch to the skin. As the side three-dimensional gather elastic stretch member 33, styrene-based rubber, olefin-based rubber, urethane-based rubber, ester-based rubber, polyurethane, etc. Commonly used materials such as polyethylene, polystyrene, styrene/butadiene, silicon, polyester, etc. In addition, it is preferable that the expansion rate of each planar gather elastic elastic member 7 when fixed is about 170% - 200%. In addition, the term "elongation" is a value when the natural length is 100%.

In addition, in the side three-dimensional gather sheet 31, the part 34 on the outer side in the width direction is bonded to the inner surface of the diaper (in the form shown in the figure, the surface of the top sheet 22 and the inner surface of the outer sheet 26) in the entire front-rear direction. The fixed portion 34, and the portion 32 on the central side in the width direction is a protruding portion 32 protruding from the fixed portion. And, at both ends of the front-rear direction in this protruding portion 32, it is bonded to the surface of the diaper (in the manner shown in the figure, the surface of the top sheet 22) in a laid-down state to form a non-rising portion 35, and these The part between the non-rising parts 35 becomes the rising part 36 which is not fixed to the surface of a diaper (in the form of illustration, the surface of the top sheet 22). The rising portion 36 stands up from the surface of the diaper (in the illustrated form, the surface of the top sheet 22) as shown by the two-dot chain line in FIG. , becomes a part in contact with the groin, and its erect base end 37 is located at the boundary between the fixed part 34 and the protruding part 32 of the side three-dimensional gather sheet 31 .

(flat folds)

In the front-to-rear direction middle portion of the side flap SF, between the side three-dimensional gather sheet 31 and the liquid-impermeable sheet 21 (or between the liquid-impermeable sheet 21 and the exterior sheet 26), along the front-to-rear direction, The elongated plane gather elastic member 27 is fixed in a stretched state by hot melt adhesive or the like, and so-called plane gathers are formed in the side flap portion SF due to the contraction of the plane gather elastic member 27. Due to the flat folds, the side portions of the diaper elastically expand and contract to fit around the legs.

The number of planar fold elastic stretchable members 27 on the left and right sides can be appropriately determined, preferably about 1 to 10, more preferably about 2 to 5, and if there are more than one, the interval is preferably 2 mm. ~15mm, particularly preferably ~6mm~10mm. In addition, as the planar gather elastic members 27, styrene-based rubber, olefin-based rubber, urethane-based rubber, ester-based rubber, polyurethane, polyethylene, etc. formed in a thread shape, a strip shape, a belt shape, etc. can be used. Commonly used materials such as polystyrene, styrene/butadiene, silicon, and polyester have a thickness of preferably about 500 dtex to 1500 dtex, and in the case of natural rubber, about 0.1 mm to 3 mm, particularly preferably 0.5 mm ~3mm or so. In addition, it is preferable that the expansion rate of each planar gather elastic elastic member 27 when fixed is about 150% - 250%.

(Absorber)

The absorber 23 is a two-layer structure composed of a lower layer absorbent body 23B and an upper layer absorbent body 23A provided above the lower layer absorbent body 23B.

As the lower layer absorbent body 23B and the upper layer absorbent body 23A, it is possible to use a high-absorbency polymer fiber with a base of a fibrous body of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, and mixed with particles, etc., if necessary. The material obtained by fixing and fixing etc. The fiber surface density of the lower layer absorbent body 23B and the upper layer absorbent body 23A and the surface density of the superabsorbent polymer can be appropriately determined, and the fiber surface density is preferably about 140 g/m ² to 230 g/m ² . The areal densities of the materials are about 60g/m ² to 90g/m ² . In the case of mixing superabsorbent polymer particles, etc., the lower layer absorbent body 23B and the upper layer absorbent body 23A can be both integrally or separately wrapped with a wrapping sheet 24 such as crepe paper (refer to FIGS. 9) Coating.

In addition, the outer shape of the absorber 23 may be an appropriate shape such as a belt, a rectangle, or a trapezoid in which the front portion is relatively wider than the rear portion, but it is preferably formed in a predetermined portion in the front-rear direction middle including the crotch portion C2. It is a narrowed portion 23n with a small width. The minimum width W3 of the narrowed portion 23n is preferably about 50% to 65% of the width (full width of the absorber 23) W2 of the non-narrowed portion located before and after the narrowed portion 23n. In addition, when the front end of the diaper is 0% and the rear end of the diaper is 100%, it is preferable that the front end of the narrowed portion 23n is in the range of 10% to 25%, and the rear end of the narrowed portion 23n is preferably in the range of 40% to 65%. It is preferable that the portion (minimum width portion) of the narrowed portion 23n having the minimum width W3 is in the range of 25% to 30%.

When the absorber has a two-layer structure, it is preferable to make the lower layer absorbent body larger. Therefore, as shown in the figure, it is preferable to form the outer shape of the absorber with the lower layer absorbent body and make the shape into the above-mentioned narrowed shape. Regarding The outer shape of the upper absorber is a rectangle narrower than the width of the narrowed portion 23n.

The absorber 23 extends from the front side of the crotch portion C2 to the rear side of the crotch portion C2 through the crotch portion C2, but it may be provided from the crotch portion C2 to the rear side of the crotch portion C2. In particular, considering male use, it is desirable to set from the front side to the back side of the scrotum placement region C1. Here, the "scrotum placement region C1" means the region in the front-back direction where the wearer's scrotum is arranged, so the front side is "the region on the front side of the scrotum placement region C1", and the rear side is "the region behind the scrotum placement region C1". ". Normally, the front-back direction length of the scrotum placement region C1 is about 80 mm to 100 mm.

(The first form of the surface depression formation area)

Characteristically, as shown in FIGS. 1 to 4 , at least at the center in the width direction of the crotch portion C2 of the lower absorbent body 23B, there is an elongated lower layer penetration portion 60 penetrating in the thickness direction (that is, no absorbent body exists). Extending in the front-rear direction, the upper layer penetration portion 50 penetrating in the thickness direction (that is, without the absorber) is provided at least in the front-rear direction range corresponding to the lower layer penetration portion 60 in the upper layer absorbent body 23A. Moreover, the upper layer penetration portion 50 has an elongated middle portion 51 located above the lower layer penetration portion 60 and extending in the front-rear direction, and an expansion portion 52 extending toward both sides in the width direction at the rear side of the middle portion 51. The expansion portion 52 The side edge of at least a part of the front side becomes the shape located in the width direction outer side as it goes to the rear side.

In the absorbent body 23 of such a two-layer structure, the absorbent body 23 does not exist in the overlapped portion (first depression forming portion) between the lower layer penetration portion 60 and the middle portion 51 of the upper layer penetration portion 50, and the expanded portion 52 of the upper layer penetration portion 50 The portion (second depression forming portion) has a single-layer structure of the lower layer absorbent body 23B, and the outer side of the expanded portion 52 of the upper layer penetration portion 50 has a two-layer structure of the upper layer absorbent body 23A and the lower layer absorbent body 23B. As shown in Figures 6 to 9, in the wearing state, when the disposable diaper is sandwiched between the legs and compressed in the width direction (refer to the hollow arrows in Figures 7 and 9), the lower penetration part 60 and the middle part 51 of the upper layer penetration portion 50 do not have the absorber 23, therefore, the side edges of the lower layer penetration portion 60 and the upper layer penetration portion 50 are approached according to the amount of compression, and fine grooves are formed on the surface of the disposable diaper. 71. At this time, although the force also acts on the single-layer structure portion 23w located in the expanded portion 52 of the upper layer penetrating portion 50 in directions approaching each other, the side edge of the expanded portion 52 of the upper layer penetrating portion 50 becomes at least a part of the front side as The shape located on the outside in the width direction toward the rear side (that is, on the right side, toward the right obliquely rearward, and on the left side, toward the left obliquely rearward), whereby the single-layer structure part 23w is easy to follow along with the two-layer structure part. The side edge of the extended portion 52 of the upper layer penetrating portion 50 of the border is bent inwardly. Therefore, the single-layer structure portion 23w is bent inwardly relative to the two-layer structure portion on the outside in the width direction, and the single-layer structure portion The non-absorbent part between 23w is concaved inwardly thereupon, as shown in Figure 6 and Figure 8, forms roughly boat-shaped depression 72 on the surface of disposable diaper. Such deformation hardly occurs when the expanded portion 52 of the upper layer penetration portion 50 is rectangular (that is, the side edge of the expanded portion 52 is U-shaped). Moreover, such a boat-shaped depression is not only easy to recover from the compression in the width direction, but also the single-layer structure portion 23w bent inward serves as a wall to maintain the depth of the depression, so the maintenance of the surface gap is excellent. During urination, among the urine excreted to the front side of the concave area, the part that is not absorbed but moves on the surface flows to the back side through the large surface gap as a flow path, and is absorbed by the back side in the process. Body 23 absorbs. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem.

The shape of the lower layer penetration portion 60 is sufficient as long as it is elongated, and other than a rectangle whose width is fixed in the front-rear direction as shown in the figure, it can also be appropriately changed, for example, the width changes in the front-rear direction (for example, the width varies with the Expanded from the rear side) shape, etc. The size of the lower layer penetration portion 60 can be appropriately determined, but in consideration of a standard adult who uses such a disposable diaper, it is preferable that the length 62 in the front-rear direction is about 180 mm to 210 mm. In addition, the width 61 of the lower layer penetration portion 60 can be appropriately determined, but if it is not too wide, the shape retention of the gap described later is better, so it is usually preferably about 20 mm to 40 mm. As shown in FIGS. 11 and 12 , a plurality of lower layer penetration portions 60 may be provided at intervals in the width direction. In addition, as shown in (a) of FIG. 29 , the front end of the lower layer penetration portion 60 may be extended forward, for example, to the front portion F2, and a branch-shaped penetration extending from the extension portion 65 to the left oblique front and right oblique front may be provided. 66, and the rear end of the lower through-part 60 is extended to the rear, for example, to the rear part B2, and a branch-shaped through-part 66 extending from the extended part 65 to the left obliquely and right obliquely is provided, or as shown in FIG. 29 As shown in (b), a radial extension portion 67 extending forward from the front end of the lower penetration portion 60, for example radially to the front portion F2, is provided, and a rear end of the lower penetration portion 60 is provided to extend backward, for example radially to the rear. Radial extension 67 of side portion B2. In the example shown in (a) and (b) of Fig. 29, the extension part 65 and the branched through part 66 or the radial extension part 67 are set on the front and rear sides, and it can also be shown in (c) and (d) of Fig. 29 As shown, only the extension part 65 and the branch-shaped penetration part 66 or the radial extension part 67 are provided at either one of the front and rear, and in addition, the shape can also be changed front and rear (for example, any one of the front and rear is set as the extension part 65 and the branch-like penetration part 66, and the other is used as the radial extension part 67, etc.).

In addition, it is desirable to provide the lower layer penetration portion 60 in the middle of the front-rear direction of the lower layer absorbent body 23B, that is, to set the lower layer penetration portion 60 in an arrangement where the lower layer penetration portion 60 does not penetrate the front and rear of the lower layer absorbent body 23B. overall rigidity.

On the other hand, the size of the upper through-section 50 can be appropriately determined, and the length in the front-rear direction (the middle part 51 is also the same) can be shorter or longer than the lower through-section 60 except that it can be the same as that of the lower through-section 60 as shown in the figure. .

Desirably, the width 55 of the middle portion 51 of the upper penetration portion 50 is equal to or greater than the width 61 of the lower penetration portion 60, and in consideration of securing the expanded portion 52, it is desirably 1.2 to 1.5 times the width 61 of the lower penetration portion 60. about. Regarding the width 56 of the portion having the expanded portion 52 of the upper layer penetration portion 50 (the sum of the width of the middle portion 51 and the width of the expanded portion 52), it is desirable to consider the size of the dent (mainly the height of the wall) or the shape maintenance of the dent. It is determined by the property, and it is desirable that it is about 1.5 times to 2 times the width 55 of the middle part 51, and more specifically, it is desirable that it is about 36 mm to 120 mm.

The front-back direction position of the extended part 52 of the upper layer penetration part 50 can be appropriately determined. As shown in the figure, the rear side position of the upper layer penetration part 50 can be extended laterally, or the middle position in the front-rear direction can be extended laterally. . In addition, the intermediate portion 51 may be extended on the front side of the upper layer penetration portion 50 as shown in the figure, and an extended portion may be added on both sides in the width direction in a shape symmetrical with the extended portion 52 at the rear side. In the worn state, a pair of boat-shaped depressions face each other across the narrow groove 71 in the longitudinal direction (forming a substantially hourglass-shaped depression).

In the middle part 51 of the upper layer through part 50, the shape of the part without the expansion part 52 can be changed as shown in the figure besides being a rectangle whose width is fixed in the front-rear direction, and can also be appropriately changed, for example, the width changes in the front-rear direction ( For example, a shape in which the width increases toward the rear side, etc. The shape of the expanded part 52 of the upper layer penetration part 50 may be a curved line shape as shown in the figure, or may be a curved shape such as an arc shape. In the way of illustration, it becomes a trapezoid with the boundary with the middle part 51 as the lower base, and the rear edge is perpendicular to the lower base (the shape of the middle part 51 including the expansion part 52 and the middle thereof is a pentagon), so that the expansion part 52 At least a part of the front side of the side edge is located on the outside in the width direction as it goes to the rear side, but it can also be set as a trapezoid (including the expansion part 52 and the middle part 51 in the middle) shown in Fig. 10 (a). is hexagonal in shape). In addition, the shape of the side edge of the expansion part 52 may be, for example, as shown in (a) of FIG. ), a shape in which a part of the front side is positioned outside in the width direction as it goes to the front side, or a rectangular shape as shown in (c) of FIG. 13 .

The position in the front-rear direction of the upper layer penetration portion 50 can be appropriately determined, but the front end (the front end of the middle portion 51) is preferably the same as or located on the front side of the front end of the lower layer penetration portion 60, but it may also be located on the rear side. In addition, the rear end of the upper layer penetration portion 50 may be the same as the rear end of the lower layer penetration portion 60 as shown in the figure, but it is preferably located on the rear side or on the front side. As an example of the latter, as shown in (b) of FIG. 60x shows the extension thereof), in this case, when urine flows into the lower side of the upper layer absorbent body 23A through the lower layer penetration portion 60, the backflow to the skin side is blocked by the upper layer absorbent body 23A.

In addition, as shown in the figure, if the middle portion 51 of the upper layer penetration portion 50 extends to the front end of the upper layer absorbent body 23A and opens at the front end of the upper layer absorbent body 23A, the front end of the upper layer absorbent body 23A and the front end of the lower layer penetration portion 60 If the position is the same or located on the rear side, when the crotch portion C2 is compressed in the width direction, the closer to the front side of the upper layer absorbent body 23A and the closer to the front side of the upper layer penetration portion 50, the easier it is to be compressed. As a result, The easier it is to form the above-mentioned boat-shaped depressions, it is preferable.

In the example shown in the figure, there is no absorber at the portion overlapping the lower layer penetration portion. Therefore, although the urine diffusibility is good, the passage formed by the lower layer penetration portion is easily deformed and may collapse. Therefore, as shown in FIGS. 14 to 16 , when a diffusion sheet 63 that promotes the diffusion of urine in the front-rear direction is provided at the bottom of the lower through-part, it is easy to maintain the passage formed by the lower through-part, and promote urine to pass through the lower through-part in the front-rear direction. diffusion.

As long as the diffusion sheet 63 can promote the diffusion of urine in the front-back direction, the type of material is not particularly limited. In addition to non-woven fabrics or plastic sheets, it is also possible to use tows of synthetic fibers such as cellulose acetate as needed. Bundle) Filament aggregates obtained by opening fibers.

As the material fiber constituting the nonwoven fabric, in addition to synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, and amides, regenerated fibers such as rayon and cupro, and natural fibers such as cotton can be used. . The surface density of the nonwoven fabric is preferably about 10 g/m ² to 40 g/m ² . In the case of using a plastic sheet, a sheet having a groove-like structure provided on the surface along the front-rear direction, or a sheet having a hollow structure bonded together with a plurality of plastic sheets may be used. Alternatively, a nonwoven fabric may be used as a base, and a superabsorbent polymer such as a particulate form may be mixed and fixed if necessary.

The fiber areal density when the filament aggregate is used can be about 30 g/m ² to 120 g/m ² . The fineness is 1dtex to 16dtex, preferably 1dtex to 10dtex, more preferably 1dtex to 5dtex. The filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimping of crimped fibers may be, for example, 5 to 75 crimps per inch, preferably 10 to 50 crimps, and more preferably about 15 to 50 crimps. In addition, crimped fibers that are evenly crimped are often used.

The diffusion sheet 63 is preferably provided over the entire lower layer penetration portion 60, but may be provided locally only in a part in the front-rear direction or a part in the width direction. The diffuser sheet 63 only needs to be provided at the bottom of the lower layer penetration portion, and may be placed between the top sheet 22 and the liquid-impermeable sheet 21 as shown in the figure, or may be adhered to the surface of the top sheet 22 . In the case where the diffuser sheet 63 is provided, when the top sheet 22 is subjected to heat and pressure processing such as heat embossing processing from above the top sheet 22 to directly or indirectly fuse the top sheet and the diffuser sheet 63, the rigidity of the bottom of the lower layer penetration portion will change. It is preferable that the passage formed by the lower layer penetrating portion is hard to collapse.

(Three-dimensional folds between the crotch)

In addition, in the form shown in the figure, the protruding portion 42 protruding from the side of the upper layer penetration portion 50 extends in the front-rear direction, and the portions located on the front side and the rear side of the protruding portion 42 respectively become non-contoured parts fixed in a collapsed state. The rising portion 45, the part between these non-rising portions 45 becomes the non-fixed rising portion 46, and is provided on both sides in the width direction of the surface. The crotch part three-dimensional gathers 40 on this standing part 46 . The rising portion 46 is a portion that rises from the surface of the diaper as shown by the two-dot chain line in FIG.

It is also possible not to set the three-dimensional gathers 40 between the crotch, but, due to the upper through-part 50 and the lower through-part 60, the absorption capacity of the crotch part C2 will inevitably decrease, and the urine becomes easy to move. set separately.

The crotch three-dimensional gathers 40 can be formed by attaching a dedicated sheet to the surface of the diaper, but preferably, as shown in the figure, the portion of the top sheet 22 that is closer to the side than the upper penetration portion 50 is bent to form a protruding portion 42 .

In the case of setting the three-dimensional gathers 40 at the crotch, when the expanded portion 52 of the upper through-section 50 is located between the non-rising portions 45 of the three-dimensional gathers 40 at the crotch in the front-rear direction (in other words, in the upper through-section 50 When the position in the width direction of the expansion portion 52 coincides with the position in the width direction of the non-rising portion 45 of the three-dimensional gathers in the crotch portion 40), the contraction force of the fold elastic elastic member 43 of the three-dimensional gathers in the crotch portion 40 effectively acts on the single-layer structure The portion 23w is preferable because it promotes the formation of the boat-shaped depressions and improves the shape retention of the depressions. However, the non-rising portion 45 of the three-dimensional gathers 40 at the crotch portion may be located on the center side or outside in the width direction of the expanding portion 52 of the upper layer penetration portion 50 .

In addition, it is desirable that the widthwise position of the proximal end of the protruding portion 42 of the crotch portion three-dimensional gathers 40 is separated from the expanded portion 52 to the side as shown in the figure, but it may also coincide with the side edge of the expanded portion 52 or Located in extension 52. In particular, it is most preferable that the proximal end of the protruding portion 42 of the three-dimensional gathers 40 in the crotch is located outside the expanded portion 52 of the upper layer penetration portion 50 in the expanded state in the width direction and is located in the two-layer structure of the upper layer absorbent body 23A and the lower layer absorbent body 23B. above. In addition, it is most preferable that the position in the width direction of the tip of the protruding portion 42 of the crotch portion three-dimensional gathers 40 be located above the single-layer structure portion 23w in the unfolded state. By adopting these arrangements, the single-layer structure part 23w is easily bent inward along the side edge of the extended part 52 of the upper layer penetration part 50 which is the boundary with the two-layer structure part. Therefore, the formation of the boat-shaped depression 72 and the Sustain gets better.

The material of the gather elastic stretch member 43 of the three-dimensional gathers in the crotch portion 40 and the expansion ratio at the time of fixing can be appropriately selected and used from the same range of materials as the three-dimensional gathers in the side portion 30 . Even if a special sheet is installed on the surface of the diaper to form the three-dimensional gathers 40 of the crotch part and a top sheet is additionally provided, and even if the part of the top sheet 22 that is sideways than the upper layer penetration part 50 is bent out as shown in the figure to form the crotch The three-dimensional gathers 40 in the crotch area are preferable when the top sheet is made waterproof at least in the area between the three-dimensional gathers 40 in the crotch area, especially at least in the area where the surface depressions are formed, since it can also promote diffusion toward the back side.

The size of each part of the crotch three-dimensional gathers 40 can be appropriately determined, but, considering the standard adult who uses this disposable diaper, it is preferable that the distance between the front and rear directions of the non-rising portion 45 is about 150 mm to 180 mm, and the distance between the protruding portion 42 is preferably 150 mm to 180 mm. The interval in the width direction of the base ends is about 60 mm to 80 mm. Moreover, it is preferable that the rising part 36 of the side part three-dimensional gathers 30 is comprised so that it may respectively extend forward and rearward rather than the rising part 46 of the crotch part three-dimensional gathers 40 .

In the illustrated example, when manufacturing, consider the common manufacturing method of conveying materials along the front-back direction of the disposable diaper and assembling, and the three-dimensional gathers 40 of the crotch part reach the full length L of the disposable diaper (however, not The length of the upright portion 45 in the front-rear direction is longer than that of the side three-dimensional gathers 30), but it can also be set as the length from the vicinity of the front side to the vicinity of the rear side based on the range in the front-rear direction of the extended portion 52 having the upper layer penetration portion 50. .

(Second form of surface depression formation area)

As shown in FIGS. 17 to 19, instead of the lower layer penetrating portion 60 of the lower layer absorbent body 23B of the first embodiment, a lower layer thinning portion 64 having a thickness smaller than that of the surrounding area (not penetrating in the thickness direction) can be formed, which can also bring the same effect as the first embodiment. Much the same advantages. That is, in the second embodiment, the overlapping portion (first depression forming portion) of the lower layer thinning portion 64 and the middle portion 51 of the upper layer penetration portion 50 has a single-layer structure of the lower layer thinning portion 64, and the extension of the upper layer penetration portion 50 The portion 52 (the second depression forming portion) has a single-layer structure composed of the portion 23w other than the thinned portion of the lower absorbent body 23B, and the outer side of the expanded portion 52 of the upper layer penetration portion 50 becomes the upper absorbent body 23A and the lower absorbent body. The two-story structure of 23B. In the wearing state, when the disposable diaper is sandwiched between the legs and compressed in the width direction, although the force also acts on the single-layer structure part located at the expansion part 52 of the upper layer penetration part 50 in the direction approaching each other. 23w, however, this single-layer structure part 23w is easy to bend inward along the side edge of the expansion part 52 of the upper layer penetration part 50 as the boundary with the two-layer structure part, thus, the single-layer structure part 23w faces When the two-layer structure part on the outside in the width direction is bent inward, the part between the single-layer structure parts 23w is dented inward accordingly, forming a wide depression on the surface of the disposable diaper. Moreover, such a dent is not only easy to recover from compression in the width direction, but also the inwardly bent single-layer structure portion 23w forms a wall to maintain the depth of the dent, so the maintenance of the dent and the maintenance of the surface gap are excellent. Therefore, in the second aspect, during urination, among the urine excreted to the front side of the recessed area, the part that moves on the surface without being absorbed flows to the rear side using the large surface gap as a flow path, During this process, it is absorbed by the absorbent body 23 on the rear side. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem.

The thickness of the lower layer thinned portion 64 is not particularly limited, and may be set to about 10% to 50% of the thickness of the portion other than the thinned portion, and may be set to about 1 mm to 5 mm in general. The lower layer thinned portion is not limited by its forming method, for example, it can be formed by making the areal density lower than that of the surrounding area, and can also be formed by compressing in the thickness direction (and heating if necessary).

In addition, it is the same as the first embodiment including the modified example, as long as the lower layer penetration portion 60 in the description of the first embodiment is replaced with the lower layer thinned portion 64 , further description is omitted.

(The third mode of the surface depression formation area)

As shown in FIGS. 21 to 22 , the shapes of the upper layer penetration portion and the lower layer penetration portion of the above-mentioned first embodiment are vertically reversed to bring about the same advantages. Reference numeral 80 in FIGS. 21 to 22 indicates the upper through-section, numeral 81 indicates the width of the upper through-portion 80 , numeral 82 indicates the length in the front-back direction of the upper-level through-portion 80 , numeral 90 indicates the lower-level through-section, and numeral 91 indicates the lower-level through-section 90 Reference numeral 92 represents the extended portion of the lower penetration portion 90, reference numeral 95 represents the width of the middle portion 91, and reference numeral 96 represents the width of the portion having the extended portion 92 of the lower penetration portion 90. In this third form, the overlapping portion (the first depression forming portion) of the upper layer penetration portion 80 and the middle portion 91 of the lower layer penetration portion 90 has a structure in which the absorber 23 does not exist, and the portion of the expanded portion 92 of the lower layer penetration portion 90 ( The second depression forming portion) has a single-layer structure of the upper layer absorbent body 23A, and the outer side of the expanded portion 92 of the lower layer penetration portion 90 has a two-layer structure of the lower layer absorbent body 23B and the upper layer absorbent body 23A. In the wearing state, when the disposable diaper is sandwiched between the legs and is compressed in the width direction, although the force also acts on the single-layer structure part located at the expansion part 92 of the lower layer penetration part 90 in the direction approaching each other. 23w, however, the single-layer structure part 23w is easily bent inwardly along the side edge of the expansion part 92 of the lower layer penetration part 90 as the boundary with the two-layer structure part, thereby, the single-layer structure part 23w faces When the two-layer structure part on the outside in the width direction is bent inward, the part between the single-layer structure parts 23w is dented inward accordingly, forming a wide depression on the surface of the disposable diaper. Moreover, such a depression is not only easy to recover from compression in the width direction, but also the inwardly bent single-layer structure portion 23w serves as a wall to maintain the depth of the depression. Therefore, the maintenance of the depression and the maintenance of the surface gap are excellent. Therefore, in the utility model described in this item, when urinating, in the urine excreted to the front side of the recessed area, the part that is not absorbed and moves on the surface takes the large surface gap as a flow path. It flows to the rear side and is absorbed by the absorbent body 23 on the rear side in the process. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem.

Although not shown in the figure, similarly, the shapes of the upper layer penetration portion 50 and the lower layer thinning portion 64 of the second embodiment may be vertically reversed.

In addition, it is the same as the first aspect and the second aspect including the modified examples, and it is only necessary to replace the upper and lower in the description of the first aspect and the second aspect, so further description will be omitted.

(Fourth form of surface depression formation area)

In the first to third forms, the absorber is set as a two-layer structure to form a surface depression forming region, but, as shown in FIGS. In the area where the surface depressions are formed, a disposable diaper having the same characteristics can be obtained.

More specifically, in the form shown in FIGS. 23 to 26 , in the widthwise central portion of the crotch portion C2 of the absorber 23 of the single-layer structure, surface dent forming regions 231 and 232 are provided, and the surface dent forming regions 231 and 232 have an elongated first dent forming portion 231 extending in the front-rear direction and a second dent forming portion 232 expanding toward both sides in the width direction at the middle position or the rear side position of the first dent forming portion 231 in the front-rear direction. The second dent forming portion 232 is a thinned portion having a thickness smaller than that of the periphery (not penetrating in the thickness direction), and the first dent forming portion 231 is a penetrating portion penetrating in the thickness direction.

In a disposable diaper having such an absorber 23, in the worn state, when the disposable diaper is sandwiched between the legs and compressed in the width direction, the surface depressions form the regions 231, 232 from The center in the width direction is deformed so as to be pushed out sequentially toward the outside of the diaper, and depressions 71 and 72 are formed on the surface of the diaper. At this time, in the surface depression forming regions 231, 232, the width of the portion composed of the first depression forming portion 231 and the second depression forming portion 232 is wider than the portion composed of only the first depression forming portion 231 by a second width. The amount of the recess forming portion 232 is reduced, thus forming the recess 72 with a larger width. Furthermore, since the thinned part ensures a certain degree of rigidity in the wide recessed portion 72 , the shape and depth of the recess 72 are excellent in maintaining properties of the surface gap. During urination, among the urine excreted in the region of the depression 72 and its front side, the part that is not absorbed but moves on the surface flows to the rear side using the large surface gap as a flow path, and is absorbed by the rear side in the process. The absorbent body 23 on the side absorbs it. Therefore, it is possible to effectively prevent diffusion inhibition caused by a small surface gap which is a conventional problem.

As shown in FIGS. 27 and 28 , instead of forming the first dent forming portion 231 as a penetrating portion, it is possible to form a thinned portion having a thickness smaller than that of the second dent forming portion 232 . When the first depression forming portion 231 is a penetrating portion, the diffusion property of urine is good, but the passage formed by the first depression forming portion 231 is easily deformed and may collapse. Therefore, by making the first depression forming part 231 a thinned part, it is easy to maintain the passage formed by the first depression forming part 231, and the diffusion of urine in the front-rear direction through the first depression forming part 231 is promoted.

The thickness of the second dent forming portion 232 is not particularly limited, and may be about 10% to 50% of the thickness of the portion other than the surface dent forming regions 231 and 232 , and may be about 1 mm to 5 mm in general. In addition, when the first dent forming portion 231 is used as a thinned portion, the thickness thereof is not particularly limited, and may be about 10% to 50% of the thickness of the second dent forming portion 232, and generally, may be 1mm ~ 5mm or so. These thinned portions are not limited by their forming method, for example, they may be formed by making the areal density lower than that of the surrounding area, and may also be formed by compressing in the thickness direction (and heating if necessary).

The first recess forming portion 231 may have the same size and shape as the lower layer penetration portion 60 of the first embodiment. That is, the shape of the first depression forming portion 231 is sufficient as long as it is elongated, and other than a rectangle whose width is fixed in the front-rear direction as shown in the figure, it can also be appropriately changed, for example, the width changes in the front-rear direction (for example, the width The shape that expands toward the rear), etc. The size of the first depression forming portion 231 can be appropriately determined, but in consideration of a standard adult who uses such a disposable diaper, it is preferable that the length 231L in the front-rear direction is about 180 mm to 210 mm. In addition, the width 231W of the first dent forming portion 231 can be appropriately determined, but if it is not too wide, the shape retention property for the dent 72 is better, so it is usually preferably about 20 mm to 40 mm. Similar to the lower layer penetration portion 60 shown in FIGS. 11 and 12 , a plurality of first depression forming portions 231 may be provided at intervals in the width direction.

In addition, it is desirable that by disposing the first dent forming portion 231 in the middle of the front-rear direction of the absorber 23, that is, by setting the first dent-forming portion 231 in an arrangement where the first dent-forming portion 231 does not penetrate the front and rear of the absorber 23, thereby ensuring Rigidity as a whole of the absorber 23 .

The second dent forming portion 232 may have the same size and shape as the portion having the extended portion 52 of the upper layer penetration portion 50 in the first embodiment. That is, the width 232W of the second dent forming portion 232 is desirably determined in consideration of the size of the dent 72 (mainly the height of the wall) or the shape retention of the dent 72, and it is desirable that the width of the first dent forming portion 231 The sum of the width 231W and the width 232W of the second dent forming portion 232 on both sides thereof is about 1.5 to 2 times the width 231W of the first dent forming portion 231 , more specifically, about 36 mm to 120 mm.

The position in the front-rear direction of the second dent forming portion 232 can be appropriately determined. As shown in the figure, the rear side position of the first dent forming portion 231 can be expanded laterally, or the middle position in the front-rear direction can be expanded laterally. . In addition, although not shown in the figure, it may also be formed such that the first dent forming portion 231 is extended on the front side of the second dent forming portion 232, and the second dent forming portion 232 at the rear side may be formed in a shape symmetrical front and rear. , add the 3rd depression forming part on both sides of its width direction, under the wearing state, a pair of boat-shaped depressions are opposite along the longitudinal direction sandwiching the thin groove (forming a substantially hourglass-shaped depression).

The shape of the second dent forming portion 232 may be a curved line in which the side edge shape is shown in the drawing, or may be a curved shape such as an arc shape. In the manner shown in the figure, it becomes a trapezoid with the boundary with the first concave forming portion 231 as the lower base, and the rear edge is perpendicular to the lower base (shape including the second concave forming portion 232 and the first concave forming portion 231 in the middle). pentagon), so that at least a part of the front side of the side edge of the second concave forming portion 232 becomes a shape located on the outside in the width direction as it goes to the rear side, but it may also be the same as that shown in FIG. 10 (a) The extended part 52 of the same trapezoid (including the extended part 52 and the middle part 51 in the middle is hexagonal in shape). In addition, the shape of the side edge of the second dent forming portion 232 may be such that a part of the front side is located on the outside in the width direction in a stepwise manner as it goes toward the rear side, similarly to the expanded portion 52 shown in FIG. 13( a ), for example. The shape, or the same as the extended portion 52 shown in FIG. 13 (b), becomes a shape in which a part of the front side is located on the outside in the width direction as it moves toward the front side, or the same as the extended portion 52 of FIG. 13 (c). become a rectangle.

In the examples shown in FIGS. 23 to 26, the absorber 23 does not exist at the portion overlapping the first depression forming portion 231. Therefore, although the diffusion of urine is good, the passage formed by the first depression forming portion 231 Easily deformed and may collapse. Therefore, when the diffusion sheet 63 that promotes the diffusion of urine in the front-rear direction is provided on the bottom of the first depression forming part 231 in the same manner as the first method, it is easy to maintain the passage formed by the first depression forming part 231 and promote the passage of urine through the first depression formation. The portion 231 spreads in the front-rear direction. The materials and modifications of the diffusion sheet 63 are the same as those of the first embodiment, and thus description thereof will be omitted.

In the case where the three-dimensional gathers 40 at the crotch are provided in the same manner as in the first mode, when the second concave forming portion 232 is positioned between the non-rising portions 45 of the three-dimensional gathers 40 at the crotch in the front-rear direction (in other words, at the (2) when the position in the width direction of the depression forming portion 232 coincides with the position in the width direction of the non-rising portion 45 of the three-dimensional gathers at the crotch portion 40), the contraction force of the fold elastic elastic member 43 of the three-dimensional gathers at the crotch portion 40 effectively acts on the first three-dimensional gathers at the crotch portion. 2. The dent forming portion 232 is preferable because the formation of the dent described above can be accelerated, and the shape retention of the dent can be improved. However, the non-rising portion 45 of the three-dimensional gathers 40 at the crotch portion may be located on the center side or outside in the width direction of the second depression forming portion 232 .

In addition, it is desirable that the widthwise position of the proximal end of the protruding portion 42 of the crotch portion three-dimensional gathers 40 is separated laterally from the second concave forming portion 232 as shown in the figure, but it may be separated from the side of the expanded portion 52 . The edge coincides with or is located within the extension 52. In addition, it is most preferable that the position in the width direction of the end of the protruding portion 42 of the crotch portion three-dimensional gathers 40 is at a position passing above the second depression forming portion 232 in the unfolded state. With these arrangements, the second dent forming portion 232 is easily bent inward along its side edge, and thus the formation and maintenance of the dent 72 become better. Others are the same as the crotch three-dimensional gathers 40 of the first embodiment, so description thereof will be omitted.

(other)

In the first to fourth aspects described above, the absorber 23 has a two-layer structure or a single-layer structure, however, it may be three or more layers. In addition, within the scope of the present invention, the surface depression forming regions 231, 232 may be formed by any one or a combination of a penetration portion, a thinned portion (compression processing, low surface density), and the number of layers of the absorber 23 to form. Therefore, for example, in the absorber 23 of a multilayer structure, the aspect which does not provide a penetration part but provides only the thinning part of a 4th aspect is also included in this invention.

The surface depression forming regions 231, 232 only need to be provided within the front-rear direction range of the crotch part C2, but it is particularly desirable that the first depression forming part 231 extends from the front side to the rear side of the scrotum disposition region C1, and the second The dent forming portion 232 extends rearward from a central position in the front-rear direction in the scrotum placement region C1 or a position behind it. In addition, as shown in the figure, when the absorber 23 has a narrowed portion 23n with a small width in the middle in the front-back direction, it is preferable that the first dent forming portion 231 and the second dent forming portion 232 extend to the narrowed portion 23n. Within or behind the range in the front-rear direction in which the width increases toward the rear.

<Explanation of terms in this manual>

The following terms in the specification have the following meanings unless otherwise specified in the specification.

- "areal density" was measured as follows. That is, a size of 100 mm×100 mm (±2 mm) was cut out from the sample with a roller knife. The weight of the sample was measured, and the weight per square meter was calculated as the areal density.

・"Thickness" is a thickness measuring device (inner diameter thickness gauge large type, model J-B (measurement range 0mm to 35mm) or model K-4 (measurement range 0mm to 50mm)) of Ozaki Manufacturing Co., Ltd. measured at the sample level.

[industrial availability]

The utility model can be applied to all disposable diapers of pad type, short pants type or belt type.

Claims (17)

1. a disposable urine napkin, it has the rear section of portion and the rear side extension in portion between hip between hip, from portion between described hip to described rear section, has the absorber absorbing urine, it is characterized in that,

Described absorber is the width central part in portion between hip at least, has the surface indentation forming region be made up of at least one party in breakthrough part through in a thickness direction and thinning part,

Described surface indentation forming region has: the 1st of elongate is recessed to form portion, and it extends along the longitudinal direction; And the 2nd is recessed to form portion, it is recessed to form the fore-and-aft direction centre position in portion or the width both sides expansion of rearward position towards the 1st,

Described 2nd portion of being recessed to form is described thinning part, and described 1st portion of being recessed to form is breakthrough part through in a thickness direction or is recessed to form the thin thinning part in portion than the described 2nd.

2. disposable urine napkin according to claim 1, is characterized in that,

Described absorber is single layer structure.

3. disposable urine napkin according to claim 1, is characterized in that,

Described absorber is that stacked multiple absorber layers forms.

4. a disposable urine napkin, it has the rear section of portion and the rear side extension in portion between hip between hip, from portion between described hip to described rear section, has the absorber absorbing urine, it is characterized in that,

As described absorber, described disposable urine napkin has lower floor's absorber and is arranged on the upper strata absorber above lower floor's absorber,

In described lower floor absorber, at least width central part in portion between hip, lower floor's breakthrough part of elongate through in a thickness direction extends along the longitudinal direction,

In the absorber of described upper strata, at least within the scope of the fore-and-aft direction corresponding with described lower floor breakthrough part, be provided with upper strata breakthrough part through in a thickness direction,

Described upper strata breakthrough part has: the mid portion of elongate, and it is positioned at above described lower floor breakthrough part, extends along the longitudinal direction; And expansion, the width both sides expansion of its fore-and-aft direction centre position towards this mid portion or rearward position.

5. disposable urine napkin according to claim 4, is characterized in that,

The mid portion of described upper strata breakthrough part extend to described upper strata absorber front end and at the front opening of described upper strata absorber,

The front end of described upper strata absorber is identical with the position of the front end of described lower floor breakthrough part or be positioned on rear side of it.

6. the disposable urine napkin according to claim 4 or 5, is characterized in that,

Described lower floor breakthrough part is arranged in the middle of the fore-and-aft direction of described lower floor absorber.

7. the disposable urine napkin according to claim 4 or 5, is characterized in that,

There is in the bottom of described lower floor breakthrough part the diffusion sheet promoting urine in fore-and-aft direction diffusion.

8. a disposable urine napkin, it has the rear section of portion and the rear side extension in portion between hip between hip, from portion between described hip to described rear section, has the absorber absorbing urine, it is characterized in that,

As described absorber, described disposable urine napkin has lower floor's absorber and is arranged on the upper strata absorber above lower floor's absorber,

In described lower floor absorber, at least width central part in portion between hip, lower floor's thinning part of elongate extends along the longitudinal direction,

In the absorber of described upper strata, at least within the scope of the fore-and-aft direction corresponding with described lower floor thinning part, be provided with upper strata breakthrough part through in a thickness direction,

Described upper strata breakthrough part has: the mid portion of elongate, and it is positioned at above described lower floor thinning part, extends along the longitudinal direction; And expansion, the width both sides expansion of its fore-and-aft direction centre position towards this mid portion or rearward position.

9. disposable urine napkin according to claim 8, is characterized in that,

The mid portion of described upper strata breakthrough part extend to described upper strata absorber front end and at the front opening of described upper strata absorber,

The front end of described upper strata absorber is identical with the position of the front end of described lower floor thinning part or be positioned on rear side of it.

10. disposable urine napkin according to claim 8 or claim 9, is characterized in that,

Described lower floor thinning part is arranged in the middle of the fore-and-aft direction of described lower floor absorber.

11. disposable urine napkins according to any one in claim 4,5,8,9, is characterized in that,

The ledge outstanding from the side of described upper strata breakthrough part extends along the longitudinal direction, and, the part of the front side and rear side that are positioned at this ledge becomes the fixing non-rising portions of the state of lodging respectively, part between these non-rising portions becomes revocable rising portions, and, the three-dimensional fold in portion between the hip on this rising portions is fixed under the width both sides on surface are provided with the state stretched along the longitudinal direction in fold elastic flexible component

Described expansion in the longitudinal direction between described hip the three-dimensional fold in portion non-rising portions between.

12. 1 kinds of disposable urine napkins, it has the rear section of portion and the rear side extension in portion between hip between hip, from portion between described hip to described rear section, has the absorber absorbing urine, it is characterized in that,

As described absorber, described disposable urine napkin has upper strata absorber and is arranged on the lower floor's absorber below the absorber of upper strata,

In the absorber of described upper strata, at least width central part in portion between hip, upper strata breakthrough part or the upper strata thinning part of elongate through in a thickness direction extend along the longitudinal direction,

In described lower floor absorber, at least within the scope of the fore-and-aft direction corresponding with described upper strata breakthrough part or upper strata thinning part, be provided with lower floor's breakthrough part through in a thickness direction,

Described lower floor breakthrough part has: the mid portion of elongate, and it is positioned at below described upper strata breakthrough part or upper strata thinning part, extends along the longitudinal direction; And expansion, the width both sides expansion of its fore-and-aft direction centre position towards this mid portion or rearward position.

13. disposable urine napkins according to claim 12, is characterized in that,

The ledge outstanding from the side of described lower floor breakthrough part extends along the longitudinal direction, and, the part of the front side and rear side that are positioned at this ledge becomes the fixing non-rising portions of the state of lodging respectively, part between these non-rising portions becomes revocable rising portions, and, the three-dimensional fold in portion between the hip on this rising portions is fixed under the width both sides on surface are provided with the state stretched along the longitudinal direction in fold elastic flexible component

Described expansion in the longitudinal direction between described hip the three-dimensional fold in portion non-rising portions between.

14. disposable urine napkins according to claim 12 or 13, is characterized in that,

The mid portion of described lower floor breakthrough part extend to described lower floor absorber front end and at the front opening of described lower floor absorber,

The position of the front end of the front end of described lower floor absorber and described upper strata breakthrough part or upper strata thinning part is identical or be positioned on rear side of it.

15. disposable urine napkins according to claim 12 or 13, is characterized in that,

Described upper strata breakthrough part is arranged in the middle of the fore-and-aft direction of described upper strata absorber.

16. disposable urine napkins according to any one in claim 4,5,8,9,12,13, is characterized in that,

The lateral margin of described expansion becomes a part at least front side along with the shape be positioned at towards rear side outside width.

17. disposable urine napkins according to claim 16, is characterized in that,

Described expansion is in being go to the bottom trapezoidal with the border of mid portion.