JP5889577B2 - Absorber and absorbent article - Google Patents

Description

  The present invention relates to an absorbent body and an absorbent article.

  In absorbent articles, such as a disposable diaper, the material and structure of each member were improved and the function and the feeling of wear have been improved. The absorbent body applied to the absorbent article has also been developed with the aim of such improvement, and in recent years, various ones having functionality according to the use situation and the type of the article have been proposed.

  In Patent Document 1, as an absorbent article, an abdominal panel that can be bent between panels, a crotch panel, a back panel, and an outer edge panel are arranged at intervals, and each panel is a single absorbent core panel as a whole. Is held as. Each panel is configured to be able to bend in the front, rear, left and right directions independently within each panel surface. Therefore, as shown in FIG. 13, when worn, gaps C <b> 1 and C <b> 2 may be generated between the skin surfaces 120 </ b> S of the model 120 at the respective bent portions B <b> 1 and B <b> 2 between the panels 111 and 112 and 112 and 113. is there.

  Moreover, in patent document 2, the absorber which consists of many independent absorption parts is arrange | positioned between a surface sheet and a back surface sheet, and a planar direction, and also an intermediate sheet between an absorber and a back surface sheet An absorbent article is disclosed. This intermediate sheet has a function of drawing the liquid drained into the absorbent article and a function of diffusing the liquid, and fixes the absorbing portion through a fixing point. This fixing point is, for example, ultrasonic embossing or hot melt adhesive. Therefore, the absorber and the intermediate sheet have an interface between them and are not integrally molded.

  In the absorbent article disclosed in Patent Document 1, when a gap is formed between the skin surface and the bent portion between the panels during wearing, liquid leakage may be caused through the gap. In addition, a feeling of strangeness may occur during wearing. Further, in the absorbent article disclosed in Patent Document 2, since the fixing portion is interposed between the intermediate sheet and the absorbing portion and has an interface, diffusion from the intermediate sheet to the absorber is caused to the fixing portion and the interface. In some cases, it was hindered and insufficient, and the absorption performance of the absorber was not sufficiently extracted.

JP 2004-049507 A JP 2009-273868 A

  An object of the present invention is to provide an absorbent body having excellent body shape compatibility and excellent absorption performance even when walking or sitting, and an absorbent article using the same.

The present invention includes an intermediate first absorbent part (corresponding to the crotch part) in which the absorbent body is divided into three in the longitudinal direction, and a second absorbent part (abdominal side part or part) divided on one side of the first absorbent part. Corresponding to one of the back side portions) and a third absorption portion (corresponding to one of the abdominal side portion or the back side portion) divided on the other side of the first absorption portion. Has a recess recessed in the shape of a groove on one side or on opposite sides of both sides,
The first concave portion arranged in the first absorption portion is arranged inside the first absorption portion in a plan view and arranged in the longitudinal direction,
The second and third recesses arranged in each of the second and third absorption parts are arranged obliquely with respect to the longitudinal direction,
The first and second recesses and the first and third recesses are configured as continuous recesses, or the first and second recesses and the third recess are separated from each other. I will provide a.

  The present invention also provides a liquid-permeable top sheet disposed on the skin contact surface side, a liquid-impermeable back sheet disposed on the non-skin contact surface side, and an absorption interposed between the two sheets. And the absorbent body is divided into three longitudinal first absorbent parts, a second absorbent part divided on one side of the first absorbent part, and the first absorbent part. A third absorbent portion divided on the other side of the first absorbent portion, and a first recess disposed in the first absorbent portion is disposed in the longitudinal direction inside the first absorbent portion in plan view, 2, the second and third recesses arranged in each of the third absorption parts are arranged obliquely with respect to the longitudinal direction, and the first and second recesses and the first and third recesses are between Provided is an absorbent article configured in a continuous recess.

In the absorbent body and absorbent article of the present invention, the first concave portion of the absorbent body is disposed in the longitudinal direction of the absorbent body, and the second and third concave portions are disposed in an oblique direction with respect to the longitudinal direction and are continuous. Thus, while exhibiting softness such as flexibility by the first recess, each of the first recess and the second recess has excellent liquid conductivity in the longitudinal direction, and the second and third recesses fit well to the body shape. Since the shape of the absorbent part is easily changed and the adhesion of each absorbent part to the required skin surface is enhanced, the body conformability is excellent even when walking or sitting.
Furthermore, since the first recess is located inside the first absorption part in plan view and is arranged in the longitudinal direction, the first absorption part easily fits the side edge portion of the absorbent body to the ridge part by the first recess. It is possible to prevent the lateral leakage of the liquid supplied to the liquid and to improve the liquid conductivity to the second and third absorption parts in the longitudinal direction from the first absorption part. In addition, since the second and third recesses arranged continuously or spaced apart from the first recess are each provided with a plurality of recesses directed obliquely with respect to the longitudinal direction, the second and third absorbers are provided. It has excellent liquid diffusibility.
Therefore, since the liquid diffusibility is improved, the liquid can be diffused in a wide range, so that the liquid absorption amount is increased and the absorption performance of the entire absorbent body can be improved.

It is the top view which showed the 1st Example of preferable one Embodiment of the absorber of this invention. It is the top view which showed the more preferable example of arrangement | positioning of each recessed part. It is the top view which showed the example of preferable arrangement | positioning of a 3rd recessed part. It is the cross-sectional schematic diagram which showed an example of the cross-sectional form of the recessed part vicinity distribute | arranged to the absorber of this invention. It is the top view which showed the 1st example of the form of the recessed part which was distribute | arranged to the absorber of this invention by planar view. It is the top view which showed the 2nd example of the form of the recessed part arrange | positioned at the absorber of this invention planarly viewed. It is the top view which showed the 3rd example of the form of the recessed part which was distribute | arranged to the absorber of this invention by planar view. It is the top view which showed the 4th example of the form of the recessed part which was distribute | arranged to the absorber of this invention by planar view. It is the top view which showed the 5th example of the form of the recessed part which was distribute | arranged to the absorber of this invention planarly viewed. It is the top view which showed the 6th example of the form of the recessed part which was distribute | arranged to the absorber of this invention planarly viewed. It is the top view which showed the 7th example of the form of the recessed part which was distribute | arranged to the absorber of this invention planarly viewed. It is the plane expanded view which showed preferable one Embodiment of the absorbent article to which the absorber of this invention was applied. It is the perspective view which showed an example of the prior art.

  A preferred embodiment of the absorbent body according to the present invention will be described below with reference to FIG.

  As shown in FIG. 1, the absorbent body 10 of the present invention is composed of three parts in the longitudinal direction L of the absorbent body 10. Specifically, the first absorption part 11 divided into the intermediate part, the second absorption part 12 arranged on one side of the first absorption part 11, and the other side of the first absorption part 11 are arranged. And a third absorption portion 13. Therefore, the first absorption part 11 is arranged between the second absorption part 12 and the third absorption part 13. In addition, the outer shape of the absorbent body 10 may be rectangular, but more preferably, the width direction d (hereinafter referred to as the width direction d is the above) so as to fit the thigh portion of the wearer's thigh. (Refers to a direction perpendicular to the longitudinal direction L)). In addition, the 1st, 2nd, 3rd absorption part 11,12,13 only displayed the area | region of the absorber 10 by division, and is not what is isolate | separated by each absorption part. Further, when the absorbent body 10 is mounted and worn on an absorbent article as will be described later, the first absorbent portion 11 is disposed on the crotch portion, for example, the second absorbent portion 12 is disposed on the ventral side, and the third The absorption part 13 is arranged on the back side. Or the 2nd absorption part 12 is arranged on the back side, and the 3rd absorption part 13 is arranged on the ventral side.

  The first absorbent portion 11 is provided with a plurality of first concave portions 21 (two first concave portions 21 in the drawing), and each first concave portion 21 is inside the side periphery of the first absorbent portion 11 in plan view. It is arranged in the longitudinal direction L. Here, a plurality of first recesses 21 (two first recesses 21 in the drawing) are arranged in the first absorption part 11, and only the first recesses 21 are arranged in the first absorption part 11. In addition to the case, it means that the second concave portion 22 and the third concave portion 23 are partially arranged. In addition to being arranged only in the longitudinal direction L, the phrase “arranged in the longitudinal direction L” is meant to include the case where it is partially arranged in another direction. In addition, second and third recesses 22 and 23 are arranged in each of the second and third absorption parts 12 and 13, and each of the second and third recesses 22 and 23 is arranged in an oblique direction with respect to the longitudinal direction L. Has been. Here, the second and third recesses 22 and 23 are arranged in the second and third absorption parts 12 and 13, respectively, when only the second and third recesses 22 and 23 are arranged. In addition, this also includes the case where the first recess 21 is partially arranged. It means that it may be arranged in an oblique direction and may be partially arranged in other directions. As a specific example of the oblique direction, it is arranged in an oblique lattice shape as shown in the figure. Accordingly, the first recess 21 is different from the second and third recesses 22 and 23 in the arrangement of the recesses.

The above oblique direction is defined as follows. The measurement starting point is the midpoint position of the portion where the longitudinal center axis CL parallel to the width direction d passing through the longitudinal center of the absorbent body 10 (position of half the longitudinal length) and the first recess 21 intersect. As a first line, the straight line that passes the longest through the first recess 21 is defined as the first line. Further, the end of the second recess 22 to be measured that is closest to the edge of the absorbent body 10 is set as the measurement starting point, and the straight line that passes through the second recess is longest. The second line direction when the first line and the second line have an intersection angle is defined as an “oblique direction”. The intersection angle ends at the first line of the first recess 21 that is closest to the edge of the first absorption portion 11 and the position that is closest to the first absorption portion 11 and closest to the widthwise edge of the second absorption portion 12. An angle intersecting the second line of the second recess 22 having a portion. The intersection angle is preferably 10 ° or more and 80 ° or less, more preferably 30 ° or more and 70 ° or less, and most preferably 40 ° or more and 60 ° or less. If the crossing angle is less than 10 °, the abdominal part and the concave part of the back part are arranged in parallel with the longitudinal direction of the absorbent body 10. For this reason, a gap is generated between the abdomen and the absorbent body 10, and it is easy to induce transmission leakage, which is inappropriate. When this crossing angle exceeds 80 °, the crossing angle becomes too large with respect to the concave portion of the first absorbing portion 11, and the liquid transmitted through the concave portion of the first absorbing portion 11 is the second and third absorbing portions 12, 13. When diffusing, the liquid must be bent greatly, resulting in a decrease in liquid diffusibility. Moreover, the 2nd line | wire of the 3rd recessed part 23 can be prescribed | regulated similarly to the above-mentioned 2nd recessed part 22, and the crossing angle in this case takes a value equivalent to the above-mentioned range. The target concave portion having the above intersection angle can be appropriately selected.
Moreover, although the said 1st recessed part 21 and the 2nd, 3rd recessed parts 22 and 23 showed the example arrange | positioned in the continuous line shape in FIG. 1, when arrange | positioned in the broken line shape (intermittent line) In the same manner as described above, the first line and the second line can also be defined.

Next, the positional relationship in the connection part of the 1st recessed part 21 and the 2nd, 3rd recessed parts 22 and 23 is demonstrated below. Although the 2nd recessed part 22 is demonstrated, the 3rd recessed part 23 is the same as that of the 2nd recessed part 22. FIG.
(1) When the end of the first recess 21 is linear and the second recess 22 of the connection portion with the first recess 21 is linear, the extension line of the first recess 21 and the second recess 22 form. The angle θ is 0 ° <θ <90 ° or 0 °>θ> −90 °. Here, the positive angle means a case where the angle with the second concave portion 22 exists outside the extended line of the first concave portion 21, and the negative angle means an inside of the extended line of the first concave portion 21. The case where there exists an angle with the 2nd recessed part 22 is said. Here, the outer side refers to the end side in the width direction d of the absorbent body 10, and the inner side refers to the center side of the absorbent body 10 in the width direction d. The same applies hereinafter.
(2) When the end of the first recess 21 is linear and the second recess 22 of the connecting portion with the first recess 21 is curved, the extension line of the first recess 21 and the first recess 21 The angle θ formed with the tangent line of the second recess 22 in the connection portion is 0 ° ≦ θ ≦ 90 ° or 0 ° ≧ θ ≧ −90 °. Here, the positive angle means a case where an angle with the tangent line of the second recess 22 exists outside the extension line of the first recess 21, and the negative angle means an extension line of the first recess 21. The case where the angle with the tangent of the 2nd recessed part 22 exists inside is said.
(3) When the end of the first recess 21 is curved and the second recess 22 at the connection portion with the first recess 21 is linear, the tangent of the first recess 21 at the connection with the second recess 22 And the second recess 22 is 0 ° ≧ θ> −180 ° or 0 ° ≦ θ <180 °. Here, the positive angle means a case where the angle with the second recess 22 exists outside the tangent line of the first recess 21, and the negative angle means that the angle inside the extension line of the first recess 21 is inside. The case where there exists an angle with 2 recessed part 22 is said.
(4) When the end of the first recess 21 is curved and the second recess 22 at the connection portion with the first recess 21 is curved, the tangent line of the first recess 21 at the connection with the second recess 22 And the angle θ formed by the tangent line of the second recess 22 at the connecting portion with the first recess 21 is 0 ° ≦ θ <180 ° or 0 ° ≧ θ> −180 °. Here, the positive angle means a case where the angle with the tangent of the second recess 22 exists outside the tangent of the first recess 21, and the negative angle means an inside of the tangent of the first recess 21. The case where there exists an angle with the tangent of the 2nd recessed part 22 is said.
In any of the above cases, since the first to third recesses 21 to 23 have a width, a line passing through the center position of each width is a line representing each recess. For example, the extension line of the first recess 21 means a line obtained by extending a line passing through the center of the first recess 21 in the width direction. The tangent line of the first recess 21 means a tangent line passing through the center of the first recess 21 in the width direction. The same applies to the second and third recesses 22 and 23. For example, in the case of a connection portion between the first recess 21 and the second recess 22, a connection point between a line passing through the center in the width direction of the first recess 21 and a line passing through the center in the width direction of the second recess 22. (For example, an intersection or a contact).
In the above (1) to (4), even if the second concave portion 22 is branched at a position away from the connection portion with the first concave portion 21, the above angular relationship is established.
In addition, each of the above relations is the same as above when one or more of the first concave portion 21, the second concave portion 22, and the third concave portion 23 are distributed in a broken line shape or intermittently. The positional relationship is as follows. In this case, the lines defining the angles are those extrapolated lines.

  In addition, the 1st recessed part 21 may be distribute | arranged to a part of 2nd, 3rd absorption parts 12 and 13 in part. For example, if the boundary between the first and second absorption parts 11 and 12 is the A line, a part of the second recess 22 is arranged on a part of the first absorption part 11. Further, if the boundary between the first and second absorption parts 11 and 12 is a B line, a part of the first recess 21 is arranged on a part of the second absorption part 12. The same applies to the third absorber 13. For example, if the boundary between the first and third absorption parts 11 and 13 is a C line, a part of the third recess 23 is arranged on a part of the first absorption part 11. When the boundary between the first and third absorption parts 13 is a D line, a part of the first recess 21 is arranged on a part of the third absorption part 13. As described above, the arrangement relationship of the recesses with respect to the respective absorption units varies depending on the set position of the boundary between the first absorption unit 11 and the second and third absorption units 12 and 13. In addition, in FIG. 1, the case where the boundary of each absorption part was A line and C line was shown as an example.

  Furthermore, the 1st, 2nd recessed parts 21 and 22 and the 1st, 3rd recessed parts 21 and 23 are comprised by the continuous recessed part.

  Moreover, although the cross-sectional shape of the 1st thru | or 3rd recessed parts 21-23 (henceforth 1st-3rd recessed parts 21-23) is not ask | required, it has a rectangle or an inverted trapezoid. In addition, since the absorber 10 is comprised with aggregates, such as a fiber like a nonwoven fabric, the outline of the cross-sectional shape of each recessed part is not decided, but is an approximate shape.

  A more preferable arrangement example of each of the concave portions will be described with reference to FIG. As shown in FIG. 2, the second and third concave portions 22 and 23 are arranged obliquely with respect to the longitudinal direction, and the second concave portion 22 is inside the second absorption portion 12 in plan view, and the third concave portion More preferably, 23 is inside the third absorption portion 13 in plan view. The first recess 21 is arranged as described above. Therefore, the outer edge portion of the absorbent body 10 is surrounded by the protruding liquid absorption storage portion 15. As a result, it is possible to prevent transmission leakage from the gap between the diaper and the human body and leakage when excreted vigorously. The minimum distance dm between the outer edge of the absorbent body 10 and the outer edge of each of the second concave portion 22 and the third concave portion 23 is appropriately determined, and is, for example, 5 mm to 50 mm, preferably 5 mm to 40 mm, and more preferably 5 mm to 30 mm.

In the absorbent body 10 of the present invention, the first concave portion 21 is arranged in the longitudinal direction L, so that the liquid having a low viscosity (5 mPa · sec or less) such as excreted urine is discharged along the concave portion in the longitudinal direction. Led. This is an effect due to the shape depressed from one surface of the absorber, and is likely to occur particularly when the amount of liquid to be discharged is large. When a depression is formed on the side of the drainage surface, the liquid will reach the depression and the concave portion will function as a water channel. When a depression is formed on the side of the non-drainage surface, When the liquid reaches the liquid, the liquid overflows into the space formed by the concave portion, and the liquid movement in the concave portion is expressed by the hydrophilic material on the wall surface of the concave portion. Moreover, even if it is a case where either effect is expressed, if it is the 1st recessed part 21 of the absorber formed with the same structure and composition, there will be an equivalent liquid introduction effect.
By providing a plurality of the first recesses 21 in the longitudinal direction L, the above-described effects can be expressed more highly. Furthermore, when the 1st recessed part 21 is distribute | arranged to the longitudinal direction L, the 1st absorption part 11 distribute | arranged to a crotch part is pressed inside by the sticking part inside a thigh at the time of wear. Thereby, the 1st absorption part 11 is bent by the 1st recessed part 21 so that the skin surface side of the absorber 10 may follow a wearer's skin surface, and a clearance gap (space of a wearer's skin and an absorber) is centered in the width direction. It becomes easier to form. At this time, a part of the first recess 21 arranged in the second and third absorption parts 12, 13 (a portion obtained by extending the end of the first recess 21 or a second recess near the end of the first recess 21. 22, the third recess 23) are arranged toward the end face side in the width direction d, and the absorber 10 in that portion is easily bent by the first recess 21 and the second recess 22 or the third recess 23. Therefore, even when there is a large amount of excretion liquid such as urine between the first absorption part 11 in the crotch part and the boundary part of the second and third absorption parts 12 and 13, the liquid is appropriately spread and the surface A gap is formed to suppress skin trouble by shortening the time during which the liquid is on the sheet, and it is difficult to cause pressure on the heel portion and hindrance to movement of the thigh due to poor gap formation of the absorber.

  Further, the second and third concave portions 22 and 23 arranged in the second and third absorbing portions 12 and 13 are concave portions in an oblique direction with respect to the longitudinal direction L, for example, in an oblique lattice shape. At the time of wearing, a gap is formed at the boundary between the second and third absorbent parts 12 and 13 of the absorber 10 due to the above-described effects, and the other part is worn along the skin surface. In order to follow the skin surface in the second and third absorbers 12 and 13 in this way, as shown in FIG. 3, not only in a lattice shape, but also in a recess inclined at an angle from the central axis C. It is preferable to form in at least two directions, and one of them is preferably arranged in the direction opposite to the central axis C side from the line extending the first recess 21 in the longitudinal direction and in the end face side direction in the width direction d. The central axis C is a line along the longitudinal direction that passes through a half position in the width direction (d direction) passing through a half position in the longitudinal direction of the absorbent body 10. From the point of preventing each absorption part from rising from the skin in a straight line in the direction parallel to the central axis C, the intersections 26 indicated by the regions where the third recesses 23 arranged in at least two directions described above intersect with each other. More preferably, there exists only one line PL parallel to the central axis C in the absorption part. In other words, it is more preferable that two or more intersecting portions 26 do not exist on the line PL parallel to the central axis C (two or more are lined up). In FIG. 3, the third absorbent portion 13 is shown, but the second concave portion 22 of the second absorbent portion 12 (not shown) is the same as the third concave portion 23 of the third absorbent portion 13. However, the intersection (not shown) of the second recess 22 of the second absorber 12 and the intersection 26 of the third recess 23 of the third absorber 13 are on the same line parallel to the center line C. There is no problem. The intersecting portion 26 is a region where concave portions having different arrangement directions intersect with each other, and is a common region of the concave portions intersecting in this region. Therefore, only one common region exists on a line parallel to the central axis C. That is, two or more common regions do not exist on a line parallel to the center line C. Thereby, each absorption part becomes easy to bend in each recessed part along a skin surface, and will be in the state which is easy to adhere | attach, without lifting from a skin surface.

Further, since the first recess 21 is inside the absorbent body 10 in plan view and is arranged in the longitudinal direction L, a gap is formed at the center in the width direction, and at the side of the thigh on the lateral side in the width direction. The second and third through the first recess 21 in the longitudinal direction L of the absorbent body 10 without leaking the liquid supplied to the first absorbent section 11 in the width direction d of the first absorbent section 11. Liquid can be passed in the direction of the absorption parts 12 and 13. Therefore, the 1st recessed part 21 also has a role which prevents a side leak in the 1st absorption part 11. FIG. As described above, the liquid diffusibility is improved while preventing the side leakage, and the liquid is diffused in the second and third absorbers 12 and 13, so that the liquid can be diffused in a wide range of the absorber 10.
Furthermore, since the second and third absorbent parts 12 and 13 are each provided with a recess in the oblique direction with respect to the longitudinal direction L, for example, the absorbent body 10 of the present invention is worn by an infant who does yes. In this case, the liquid is easily diffused into the second absorption part 12 or the third absorption part 13 worn on the lower abdomen when yes is applied. At that time, the liquid can be diffused over a wide range of the second and third absorption parts 12 and 13 by the second and third concave parts 22 and 23, and the diffused liquid can be diffused into the second and third concave parts 22 and 23. Since the absorber 10 arranged in the part absorbs, leakage from the abdomen can be prevented.
Furthermore, since the first and second recesses 21 and 22 and the first and third recesses 21 and 23 are configured as continuous recesses, the liquid supplied to the first absorption unit 11 is It becomes easy for liquid to pass through the second and third recesses 22 and 23 from the nozzle 21. Also from this point, since the liquid diffusibility is improved, the liquid can be diffused in a wide range of the absorber 10.
Therefore, since the liquid diffused in a wide range of the absorbent body 10 is absorbed by the absorbent body 10 disposed on the side portion of each recess, the amount of liquid absorbed by the entire absorbent body can be increased.
The second and third recesses may be extended to the end of the peripheral edge of each absorbing portion as shown in the figure, but are not limited thereto. For example, the second concave portion 22 is inside the second absorbent portion 12 in plan view, and the third concave portion 23 is inside the third absorbent portion 13 in plan view, so that the second and third concave portions 22 and 23 are formed. Since the transmitted liquid is blocked by the edge portions of the second and third absorbing portions 12 and 13, side leakage can be prevented.

Further, the first absorption part 11 is narrower than the second and third absorption parts 12 and 13. That is, the absorber 10 is configured in a shape narrowed in plan view with respect to the second and third absorbers 12 and 13 in the first absorber 11. And it is preferable that the outer periphery of the 1st absorption part 11 and the 2nd, 3rd absorption parts 12 and 13 is comprised in the continuous shape. This facilitates the fit of the crotch part to the inner part of the thigh and the formation of a gap at the center in the width direction, suppresses discomfort and kinking of the absorbent body 10, and moves the body (yes, walking, etc.) After the movement of the first absorption part 11 to the left and right according to the above, the second and third absorbers 12 and 13 can be easily returned to the original state due to the wide width.
In addition, as described above, the concave portion is not disposed only on one surface of each absorption portion, but a concave portion that is recessed in a concave shape is disposed at a position where both surfaces of each absorption portion face each other. Also good. Furthermore, the structure which the 1st recessed part 21, the 2nd recessed part 22, and the 3rd recessed part 23 spaced apart may be sufficient. In other words, the first recess 21 and the second recess 22 may be separated from each other, and the first recess 21 and the third recess 23 may be separated from each other. Even if it is these structures, although the liquid permeability of 1st, 2nd recessed parts 21 and 22 and 1st, 3rd recessed parts 21 and 23 is a little inferior to the above-mentioned structure, it is the same effect as above. Is obtained. The configuration in which the first concave portion 21, the second concave portion 22, and the third concave portion 23 are separated from each other is preferable in that the shape of the absorber is easily maintained even when a large amount of liquid is held and fixed.

  Therefore, since the absorbent body 10 of the present invention changes the shape of each absorbent portion along the body shape while maintaining softness, the gap forming property at the crotch center with respect to the skin surface of each absorbent portion and the crotch side Since the adhesion of the part is enhanced, it is excellent in body shape compatibility even when walking or sitting, and a comfortable wearing feeling can be obtained.

Next, the basic form of each concave part arranged in the absorber 10 will be described in detail.
First, an example of a cross-sectional form of the absorber near the recess will be described below with reference to FIG.
As shown in FIG. 4, the first to third recesses 21 to 23 described above have a part of the absorber 10 at the bottom. That is, the absorbent body 10 includes a concave portion for diffusing liquid in a plane direction, a liquid receiving layer portion 14 for temporarily holding and transferring the liquid, and a continuous surface of the liquid receiving layer portion 14 on one surface side of the liquid receiving layer portion 14. And a plurality of protruding liquid absorption storage parts 15 that finally hold a plurality of separated liquids. Accordingly, the first to third recesses 21 to 23 are disposed between each protruding liquid absorption storage unit 15 and another adjacent protruding liquid absorption storage unit 15. In the drawing, an example in which the first recess 21 is arranged is shown as a representative. The second and third recesses 22 and 23 shown in parentheses have the same cross-sectional configuration as the first recess 21.

  Since the absorbent body 10 having such a cross-sectional configuration is not divided by the first to third recesses 21 to 23, the liquid supplied into the first to third recesses 21 to 23 is the first to third recesses 21. It penetrates into the liquid receiving layer part 14 at the bottom of ˜23 and is held by the liquid receiving layer part 14 at the bottom of the protruding liquid absorption storage part 15 disposed on the side of the first to third recesses 21-23. When the liquid that cannot be held by the liquid receiving layer portion 14 is discharged, the liquid is diffused by the concave portion, guided in the longitudinal direction, and temporarily held by the liquid receiving layer portion disposed there. The retained liquid is absorbed from the liquid receiving layer portion 14 and stored in the protruding liquid absorption storage portion 15. Therefore, by setting the side on which the first to third recesses 21 to 23 are formed as the skin contact surface side, most of the liquid can be temporarily held at the position farthest from the skin surface. A feeling of stickiness on the contact surface side is suppressed, and a comfortable wearing feeling can be obtained.

Next, the arrangement | positioning form of the recessed part at the time of planar view is demonstrated below.
The first example of the arrangement form of the recesses in plan view shows an example of the arrangement form of the first recesses 21. As shown in FIG. Arranged in the direction L. The first concave portion 21 is arranged in the longitudinal direction L as a whole of the first concave portion 21, and is configured in a linear shape, a curved shape, a broken line shape, or the like as long as it is arranged at least inside the planar view absorber 10. Or a combination of some of them. This first example is a basic form of the arrangement of the first recesses 21.

  As described above, since the first concave portion 21 is arranged in the longitudinal direction L, the liquid supplied to the first absorbing portion 11 is guided to the second and third absorbing portions 12 and 13 through the first concave portion 21. Nature is increased and it becomes easy to diffuse. That is, the diffusibility of the liquid is improved. Furthermore, the lateral end of the liquid supplied to the first absorption unit 11 can be prevented by the first recess 21 being bent by being lifted and bent in the width direction, with the side portions becoming relatively high and closely contacting.

  As shown in FIG. 6, the second example of the arrangement of the recesses in plan view includes a plurality of recesses of the second recesses 22 (in the illustrated example, the two second recesses 22 </ b> A and 22 </ b> B). The first recess 21 is connected in the region A1 where the first recess 21 is disposed. Similarly, a plurality of recesses (in the illustrated example, two third recesses 23A and 23B) of the third recesses 23 are located in the region A1 where the first recesses 21 (21A and 21B) are arranged. It is connected with.

  As described above, the plurality of recesses of each of the second recesses 22 and the third recesses 23 are connected to each other in the region A1 in which the first recesses 21 are arranged, and thus are supplied to the first absorption unit 11. The liquid easily diffuses from the region A1 where the first recess 21 is disposed to the second absorption part 12 through the second recess 22 and to the third absorption part 13 through the third recess 23. That is, the diffusibility of the liquid is improved. Further, the second recess 22 and the third recess 23 between the first recesses facilitate the formation of a gap in the crotch portion, and the second recess 22 and the third recess 23 located laterally from the first recess are the same as described above. The end of the absorbent body 10 bends in the recess while being in close contact with the body so as not to cause pressure on the thigh and obstruction of movement of the thigh. , A third absorption part).

  As shown in FIG. 7, in the third example of the arrangement of the concave portions in plan view, the end portion of the first concave portion 21 arranged in the first absorbing portion 11 extends to the second and third absorbing portions 12 and 13. In the case where the second concave portion 22 is connected to the first concave portion 21, the second concave portion 22 may be connected to the second absorbent portion 12. Similarly, the third recesses 23 connected to the first recesses 21 may be connected to each other at the third absorption portion 13. And the 2nd, 3rd recessed parts 22 and 23 are with respect to the longitudinal direction L so that it may return to the 1st absorption part 11 side from the position connected with the 1st recessed part 21 in the 2nd and 3rd absorption parts 12 and 13. May be arranged in an oblique direction.

  Thus, in the 2nd, 3rd absorption parts 12 and 13, since the 2nd crevice 22 arranged in each and the 3rd crevice 23 are connected, it was supplied to the 1st absorption part 11. The liquid can be diffused from the first recess 21 through the second and third recesses 22 and 23 to the end in the width direction of the second and third absorbers 12 and 13 on the first absorber 11 side. In addition, in the case of this recessed part structure, it is more preferable to use in combination with another recessed part structure.

  Next, an arrangement form of the second and third depressions 22 and 23 will be described as a fourth example of the arrangement form of the recesses in plan view. As shown in FIG. 8, the second and third recesses 22 and 23 are arranged in an oblique direction with respect to the longitudinal direction L, and one end of the second recess 22 reaches the circumferential surface S2 of the second absorption unit 12, and One end of the three recesses 23 reaches the circumferential surface S3 of the third absorption portion 13. The fourth example is a basic form of the arrangement form of the second and third recesses 22 and 23. The inclination angle of the second and third recesses 22 and 23 with respect to the longitudinal direction L can be determined as appropriate depending on the form of the second and third recesses 22 and 23 because they can take various forms such as a straight line and a curved line. Is done.

  The second and third recesses 22 and 23 arranged in this manner facilitate the diffusion of the liquid to the entire area of the second and third absorbers 12 and 13. Further, when the absorbent body 10 having such a recessed portion arrangement is worn, the second absorbent portion 12 is bent by the second recessed portion 22, and the third absorbent portion 13 is bent by the third recessed portion 23. It becomes easy and it becomes easy to fit the 2nd absorption part 12 or the 3rd absorption part 13 to a shading part. Thereby, the uncomfortable feeling at the time of operation | movement of the wearer of the absorber 10 is reduced. Note that some of the second and third recesses 22 and 23 do not necessarily have to reach the peripheral surfaces S2 and S3 of the second and third absorption portions 12 and 13, and the second and third in a plan view. One end of the absorber 12 or 13 may exist.

  Next, as shown in FIG. 9, in the fifth example of the arrangement of the concave portions in plan view, when both end portions of the first concave portion 21 are formed in a part of the second and third absorbing portions 12 and 13, Both end portions of the first recess 21 are connected to the second and third recesses 22 and 23 by the second and third absorption portions 12 and 13. The second and third recesses 22 and 23 are arranged in an oblique direction with respect to the longitudinal direction L, and the second recesses 22 (22A and 22B) intersect with each other in the second absorption portion 12, and the third absorption portion. 13, the third recesses 23 (23 </ b> A, 23 </ b> B) intersect each other. Therefore, this configuration is a combination of the third example and the fourth example.

  As described above, the plurality of concave portions of the second concave portion 22 and the third concave portion 23 are connected to each other in the first concave portion 21 and the second and third absorbing portions 12 and 13, and the second concave portions 22 are connected to each other. Since the third recesses 23 are connected to each other, the liquid supplied to the first absorption unit 11 is transferred from the first recess 21 to the second absorption unit 12 through the second recess 22 and through the third recess 23 to the third. It becomes easy to diffuse to the absorption part 13. That is, the diffusibility of the liquid is improved.

  As shown in FIG. 10, the sixth example of the arrangement of the concave portions in plan view includes a plurality of first concave portions 21 (two first concave portions 21 </ b> A and 21 </ b> B in the drawing) arranged in a direction intersecting the longitudinal direction L. A communication recess 24 that connects the first recesses 21 is disposed. Although the number of the connecting recesses 24 is two in the illustrated example, the number of the connecting recesses 24 is preferably determined as appropriate. Moreover, in the example of illustration, although the communication recessed part 24 is distribute | arranged to the state inclined at the same angle in one direction, it is preferable that an inclination direction and an inclination angle are determined suitably. For example, as illustrated, the inclination direction of the communication recess 24A and the communication recess 24B is the same direction. Of course, the communication recess 24A and the communication recess 24B may be arranged in different directions and at different angles. The inclination angle of the communication recess 24 with respect to the longitudinal method L is, for example, 45 degrees. Of course, the angle is not limited to 45 degrees, and may be 30 degrees or 60 degrees, and the angle is appropriately determined. Moreover, you may arrange | position the arrangement | positioning position of the communication recessed part 24 outside the position where a liquid is supplied, for example. Alternatively, one connecting recess 24 may be disposed at a position where the liquid is supplied, and the other connecting recess 24 may be disposed outside the position where the liquid is supplied.

  Thus, since the 1st recessed parts 21 (21A, 21B) are connected by the communication recessed part 24, the liquid permeability between the 1st recessed parts 21 improves, and it becomes easy for a liquid to flow into the some 1st recessed part 21. FIG. Accordingly, as described with reference to FIG. 4, the diffusibility of the liquid from the bottom of each first recess 21 to the entire absorber is improved, so that the diffusion amount can be increased and the diffusion rate can be improved. Further, the communication recess 24 may be formed in the same manner as the first recess, but from the viewpoint of liquid diffusibility and free formation of the shape, the liquid receiving layer portion 14 and the protruding liquid absorption storage portion 15 are squeezed. The formed compression recessed part may be sufficient. In the squeezed recess, once the liquid retainability is lowered, it also has the diffusibility of the liquid once retained in the liquid receiving layer portion 14 in addition to the diffusibility when discharging a large amount.

As shown in FIG. 11, in the seventh example of the arrangement of the concave portions in plan view, the basis weight of the absorber 10 (the liquid receiving layer portion 14) at the bottom of each of the second concave portion 22 and the third concave portion 23 is the first. The basis weight of the absorbent body 10 (liquid receiving layer portion 14) at the bottom of the recess 21 is larger. Specifically, by changing the thickness of the liquid receiving layer portion 14 at the bottom of the recess, in other words, by changing the depth of the recess, the basis weight of the outer portion is larger than the central portion in the longitudinal direction. . For example, in order to increase the basis weight, the thickness of the liquid receiving layer portion 14 may be increased (the depth of the concave portion is reduced), and in order to decrease the basis weight, the thickness of the liquid receiving layer portion 14 is decreased (the concave portion). Deepen). For example, the basis weight of the liquid receiving layer at the bottom of the first recess 21 is 10 g / m ² or more and 300 g / m ² or less, preferably 30 g / m ² or more and 200 g / m ² or less, more preferably 40 g / m ^2. It shall be 150 g / m ² or more. The basis weight of the liquid receiving layer at the bottom of the second and third recesses 22 and 23 is 10 g / m ² or more and 330 g / m ² or less, preferably 40 g / m ² or more and 230 g / m ² or less, more preferably. Is 50 g / m ² or more and 180 g / m ² or less. Moreover, the basic weight of the liquid-receiving layer part of the bottom part of the 2nd, 3rd recessed parts 22 and 23 is 10 g / m < ² > from the basic weight of the 1st recessed part 21, More preferably, it is 20 g / m < ² >, More preferably, it is 30 g / m. It is preferably ² or higher. As an example, the basis weight of the liquid receiving layer at the bottom of the first recess 21 is 50 g / m ^2, and the basis weight of the liquid receiving layer at the bottom of the ^second and third recesses 22 and 23 is 100 g / m ² . .

  Thereby, the liquid taken into the liquid receiving layer part 14 of the first absorption part 11 is easily drawn into the liquid receiving layer part 14 of the second absorption part 12 and the third absorption part 13. For this reason, when the absorbent body 10 is applied to a diaper as an absorbent article, the liquid drained by the liquid-receiving layer portion 14 of the first absorbent portion 11 is taken in, and then the second absorbent portion 12 and the third absorbent portion 13 on both sides. Can be drawn into the liquid receiving layer portion 14. Therefore, the amount of the discharged liquid taken up can be increased, and the taken-in liquid can be absorbed by the protruding liquid absorption storage unit 15 in the entire absorber 10, so that the absorbed amount can be improved.

The absorbent body 10 of the present invention is configured by combining some of the above-described concave portions. Therefore, the absorbent body 10 of the present invention is excellent in body shape compatibility even when walking or sitting while maintaining softness, and can improve the absorption performance of the entire absorbent body. In addition, it also has the effect of the recesses of the above-described forms.
Furthermore, the absorbent body 10 of the present invention is formed by the liquid receiving layer portion 14 and the protruding liquid absorption storage portion 15 in the cross-sectional configuration, and has the above-described effects by the configuration, but improves each function. Therefore, it is preferable that the liquid-receiving layer part 14 has a low final holding function, and it is preferable that the superabsorbent polymer has a lower density than the protruding liquid absorption storage part 15 or is not disposed. The protruding liquid absorption storage unit 15 is preferably provided with a superabsorbent polymer so as to have a higher holding function than the liquid receiving layer part 14, and has a higher density than the liquid receiving layer part 14. More preferred. Note that the liquid receiving layer portion 14 does not have to be formed at the same density in all portions, and in the position overlapping the protruding liquid absorption storage portion 15, the liquid may be higher in density than each concave portion. It is preferable from the point which moves to an absorption storage part, and in the protrusion liquid absorption storage part 15, it is that the density is gradually increasing toward the center part of the protrusion liquid absorption storage part 15 from the periphery of the protrusion liquid absorption storage part 15. preferable.

  Next, a preferred embodiment of the absorbent article according to the present invention will be described below with reference to FIG. 12, an example in which the above-described absorbent body 10 is applied to a disposable diaper (hereinafter referred to as diaper) 50. In addition, in FIG. 12, the surface sheet 16 of the center part of the longitudinal direction L of the diaper 50 is notched.

  As shown in FIG. 12, the diaper 50 has a constricted shape at the center in the longitudinal direction L corresponding to the crotch part as a whole. The top sheet 16 and the back sheet 17 respectively extend outward from the left and right side edges and both front and rear ends of the absorbent body 10. The front sheet 16 is smaller in the width direction d than the back sheet 17 in the width direction d. The diaper 50 is an unfolded diaper, and a pair of fastening tapes FT are attached to both side edges at one end in the longitudinal direction L. Further, a landing tape LT is attached on the back sheet 17 at the other end.

  The diaper 50 includes a three-dimensional gather that can rise above the edge in the width direction d side of the absorbent body 10. That is, a sheet material (side sheet) 18 for a three-dimensional gather having a gather elastic member 56 is arranged on each side of the diaper 50 in the longitudinal direction L to form a three-dimensional gather. Further, on one side of the diaper 50 in the longitudinal direction L, a pair of right and left leg elastic members 58 and 58 (two in this drawing) for leg gathers are arranged to form a leg gather. Yes. Leg elastic members 58 for leg gathers are arranged in a substantially linear shape in an extended state in leg flaps extending outward from both side edges in the longitudinal direction L of the absorbent body 10. In this case, the longitudinal direction L in the diaper 50 and the longitudinal direction L in the absorbent body 10 are the same direction.

  One or a plurality of gather elastic members 56 (three in this drawing) are fixed to one side edge of the sheet material 18 for three-dimensional gathers in an expanded state. The sheet material 18 is joined to the surface sheet 16 along the longitudinal direction L of the diaper 50 at positions outside the left and right side edges of the absorbent body 10 in the width direction d, and the joined portion is a three-dimensional gather. It is a rising base. The sheet material 18 extends outward in the width direction d of the diaper 50 from the rising base end portion, and is joined to the back sheet 17 at the extended portion. The sheet material 18 is bonded onto the top sheet 16 at the front and rear end portions in the longitudinal direction L of the diaper 50.

As the sheet material 18 for three-dimensional gathers, a liquid-impermeable or water-repellent and moisture-permeable material is preferably used. Examples of the sheet material 18 include a liquid-impermeable or water-repellent porous resin film, a liquid-impermeable or water-repellent nonwoven fabric, or a laminate of the porous resin film and the nonwoven fabric. Examples of the nonwoven fabric include thermal bond nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, and SMMS nonwoven fabric. The basis weight of the sheet material 18 preferably ^{5g / m 2 ~30g / m 2} , more preferably from ^{10g / m 2 ~20g / m 2} .

The surface sheet 16 can be any of various types conventionally used in this type of diaper, and is not limited as long as it can transmit a liquid such as urine. For example, synthetic fiber or natural fiber And woven fabrics, nonwoven fabrics, and porous sheets. As an example of the surface sheet 16, a core-sheath structure type (including side-by-side type) composite fiber using polypropylene or polyester as a core component and polyethylene as a sheath component is formed into a web by carding, and then non-woven fabric (after this) And a predetermined portion may be subjected to a hole opening treatment). From the viewpoint of high liquid permeability (dry feeling), an apertured sheet made of polyolefin such as low density polyethylene can also be preferably used.
As the back sheet 17, various types conventionally used in this type of diaper can be used, and a liquid-impermeable or water-repellent and moisture-permeable sheet is preferably used. As the back sheet 17, for example, a sheet that can be used as the above-described sheet material 18 for forming a three-dimensional gather can be used. Further, the width of the back sheet 17 is set to be approximately the same as the width of the absorbent body 10 and is disposed on the non-skin contact surface side of the absorbent body 10. You may provide the laminated body of a nonwoven fabric and a film, etc. as a sheet | seat which comprises the external shape of a diaper.
The non-skin contact surface is a surface directed toward the clothing side (the side opposite to the wearer's skin side) when the diaper is worn. Hereinafter, the term skin contact surface may be used, and the skin contact surface is a surface directed toward the wearer's skin when the diaper is worn.

  This diaper 50 can be used in the same manner as a normal unfolded diaper. The diaper 50 achieves both a high absorption amount and a comfortable wearing feeling by the action of the absorbent body 10, and a stretchable sheet on the liquid-receiving layer portion 14 (see FIG. 4) serving as a base sheet of the absorbent body 10. By using, it deforms according to the complex undulating skin surface, conforms to the human body that contacts with the surface without gaps, and deforms according to the movement of the wearer's body, and is in contact with the skin surface with the surface It keeps the movement following ability to maintain.

  The top sheet 16 is preferably made of a material that is liquid permeable and soft against the skin. For example, a non-woven fabric made of natural fibers such as cotton or a non-woven fabric made of various synthetic fibers subjected to hydrophilic treatment can be used. The back sheet 17 is preferably made of a liquid-impermeable sheet material. The back sheet 17 may be water vapor permeable as required. Specifically, in order to obtain sufficient water vapor permeability, a film made of synthetic resin such as polyethylene in which fine powder made of a filler such as calcium carbonate is dispersed is stretched and a porous film having fine holes is used. preferable. Examples of the side sheet include a nonwoven fabric, a film sheet, and paper. From the viewpoint of leakage prevention, it is preferable that the side sheet is formed of a liquid non-permeable or hardly permeable hydrophobic nonwoven fabric, a leakage-proof film sheet, or the like. One sheet may be used, or two or more sheets may be combined with a functional sheet.

  Further, in addition to the top sheet 16, the absorber 10, the back sheet 17, and the side sheet, members may be appropriately incorporated according to the use and function. In addition, the material of the surface sheet 16, the absorber 10 and the back surface sheet 17 of the said embodiment, the conditions in a manufacturing method, and the dimensional specification of a product are not specifically limited, The various materials normally used can be used.

Since the absorbent article 50 of the present invention has the absorbent body 10 of the present invention attached to the absorbent body, it is excellent in body shape compatibility even when walking or sitting while maintaining softness. A comfortable wearing feeling can be obtained.
It is preferable that a plurality of first recesses are formed from the viewpoint of diffusibility and fit, but the width of the recesses is larger than 2 mm to 5 mm, for example, 15 mm to 20 mm, and the same as the plurality of first recesses. There is an effect. Moreover, the form which produces the effect equivalent to the 1st recessed part of a space | interval of about 15 mm to 25 mm by setting the space | interval of a 1st recessed part to 45 mm to 55 mm, and forming one or more pressing recessed parts in the same direction as a 1st recessed part in the meantime. It can also be.

  The absorbent body 10 of the present invention is not limited to the above-described embodiment, but in addition to the unfolded diapers as described above, pants-type diapers, sanitary shorts, shorts-type napkins, sanitary napkins, incontinence pads, incontinence It can be used for an absorber contained in an absorbent article such as a liner. Moreover, even if the said absorbent article is for infants, it is applicable even if it is for adults. Furthermore, it is effective not only for urine but also for menstrual blood, orimono, loose stool, and the like.

DESCRIPTION OF SYMBOLS 10 Absorber 11 1st absorption part 12 2nd absorption part 13 3rd absorption part 21 1st recessed part 22 2nd recessed part 23 3rd recessed part L Longitudinal direction d Width direction S2, S3 Circumferential surface

Claims (6)

A first absorption part of an intermediate part in which the absorbent body is divided into three in the longitudinal direction, a second absorption part divided on one side of the first absorption part, and a third divided on the other side of the first absorption part. Each of the absorption parts has a recess recessed in a groove shape on one surface or in a position facing both surfaces,
The first concave portion arranged in the first absorption portion is located inside the outer edge of the first absorption portion in plan view and is arranged in the longitudinal direction,
The second and third recesses arranged in each of the second and third absorption parts are arranged obliquely with respect to the longitudinal direction,
The first and second recesses and the first and third recesses are configured as continuous recesses, or the first recess and the second and third recesses are separated from each other ,
The basis weight of the absorber at the bottom of each of the second and third recesses is larger than the basis weight of the absorber at the bottom of the first recess . The absorber according to claim 1, wherein the second recess is located on an inner side of an outer edge of the second absorption part in a plan view, and the third recess is located on an inner side of an outer edge of the third absorption part in a plan view. The absorber according to claim 1 or 2, wherein the first, second, and third recesses have a part of the absorber at their bottoms. A plurality of recesses of the second recesses are connected in a region where the first recesses are arranged,
The absorber according to claim 1, claim 2, or claim 3, wherein a plurality of recesses of the third recesses are connected in a region where the first recesses are arranged. The absorber according to any one of claims 1 to 4, wherein a plurality of the first recesses are arranged, and communication recesses that connect the first recesses are arranged in a direction intersecting the longitudinal direction. A liquid-permeable surface sheet disposed on the skin contact surface side;
A liquid-impermeable back sheet disposed on the non-skin contact surface side;
An absorber interposed between the two sheets,
The absorbent body is divided into an intermediate first absorption section divided into three in the longitudinal direction, a second absorption section divided on one side of the first absorption section, and the other side of the first absorption section. A third absorbent portion, and each absorbent portion has a recess recessed in a groove shape on one side or on both sides of the opposite side,
The first concave portion arranged in the first absorption portion is arranged inside the first absorption portion in a plan view and arranged in the longitudinal direction,
The second and third recesses arranged in each of the second and third absorption parts are arranged obliquely with respect to the longitudinal direction,
The first and second recesses and the first and third recesses are configured as a continuous recess ,
An absorbent article in which the basis weight of the absorber at the bottom of each of the second and third recesses is greater than the basis weight of the absorber at the bottom of the first recess .

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