JP2010110535A - Liquid absorbing structure and wearable article including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid absorbing structure retaining the transfer of a bodily fluid via a recess without destroying the shape of the recess formed in an absorber; and a wearable article including the same. <P>SOLUTION: The panty liner 1 includes: a front surface sheet 11 located on the body side; a rear surface sheet 12 located on the clothes side, opposite from the body side; and first and second absorbers 20 and 30 formed between the sheets 11 and 12. Front and rear end areas 26 and 27, where a first core material 24 is substantially non-existent, are formed in first front and rear end edges 22 and 23 of the first absorber 20, and the recess 50 extending in the vertical direction Y, whose cross section is approximately V-shaped, is formed in the first and second absorbers 20 and 30. The recess 50 reaches the second absorber 30 via the front surface sheet 11 and first absorber 20 in the direction of thickness, and extends to a front end extending part 33 of the second absorber 30 from the area 28 where the first absorber 20 is existent via the area 26 where the first absorber is substantially non-existent in the vertical direction Y. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid-absorbing structure, and more particularly, can absorb and retain body fluids, and is a so-called panty-liner for downdrafts such as mucus / tissue from a female genital organ, sanitary napkin or pad, The present invention relates to a liquid absorbing structure used for wearing articles such as disposable diapers.

Conventionally, as an absorptive article used for a wearer's crotch, JP, 2008-173247, A (patent documents 1) is publicly known, for example. In Patent Document 1, a sanitary napkin is used as an absorbent article. This sanitary napkin includes front and back sheets and an absorbent layer formed between these sheets, and the absorbent layer is formed by a laminate of an upper absorbent layer and a lower absorbent layer. A recess is formed from the upper absorption layer to the lower absorption layer, and body fluid is quickly transferred from the upper absorption layer to the lower absorption layer via the recess.
JP 2008-173247 A (JP 2008-173247 A)

  In the absorbent article as described above, when the body fluid is absorbed by the upper and lower absorbent layers, the absorbent core material forming the absorbent layer expands. There is a possibility that the shape of the concave portion is broken by the expansion of the liquid-absorbent core material. In particular, at the ends of the upper and lower absorbent layers, the expansion of the liquid-absorbent core material toward the outside thereof is limited, so that the expansion toward the concave portion is increased correspondingly, and the shape of the concave portion is significantly collapsed. That is, the dimension in the thickness direction of the recess is reduced, or the dimension in the width direction is reduced. When the shape of the concave portion collapses as described above, when body fluid flows in again, the body fluid cannot be quickly transferred to the lower absorption layer via the concave portion.

  This invention makes it a subject to provide the liquid absorption structure which can maintain the transfer of the bodily fluid through a recessed part, and the wearing article containing this, without the shape of the recessed part formed in the absorber breaking down.

This invention includes the first invention and the second invention.
The first invention includes a longitudinal direction and a lateral direction, a first absorbent body and a second absorbent body, the first absorbent body includes a liquid-absorbing first core material, and the second absorbent body includes In addition, the present invention relates to improvement of a liquid absorbing structure of a wearing article that includes a liquid-absorbing second core material and has a recess formed in the thickness direction of the first absorbent body and the second absorbent body.

  According to a first aspect of the present invention, in the liquid absorbing structure, the first absorber includes first side edges extending in the longitudinal direction, first front and rear end edges extending in the lateral direction, and presence of the first core member. A first non-existent region of the first core member formed on at least one of the first side edges and the first front and rear edges, and the second absorbent body includes the first front and rear edges. And an extending portion extending from at least one of the first side edges, and the concave portion extends from the existing region of the first absorbent body through the substantially non-existing region to the second absorbent member. It extends to the extension part.

  As one preferred embodiment, the existence area includes a central substantially non-existence area where the first core material is not formed in a portion corresponding to the recess.

  As another preferred embodiment, the recess is formed by pressing.

  As another preferred embodiment, the recess extends in at least one of the vertical direction and the horizontal direction.

  As another preferred embodiment, a plurality of the recesses are formed.

  As another preferred embodiment, the second absorbent body has a second core material at a position corresponding to the substantially non-existing region.

  2nd invention is related with improvement of the wearing article containing a liquid absorption structure, This wearing article contains the surface sheet located in a wearer's body side, and the back surface sheet located in the other side of the said body side. The first absorber is located on the top sheet side, and the second absorber is located on the back sheet side.

  In the liquid-absorbing structure of the present invention, the first absorbent body is formed with a liquid-absorbing first core material existing region and a substantially non-existing region, and the concave portion is changed from the existing region to the substantially non-existing region. It was decided to extend to the extension part of the second absorber. Therefore, even if the body fluid is absorbed by the first and second absorbers, the core material does not exist in the substantially non-existing region, so that it does not expand and prevents the shape of the recess from collapsing. be able to. Since the shape of the recess is maintained without collapsing, the body fluid quickly moves to the second absorber through the recess.

  An example of the wearing article including the liquid absorbing structure in the present invention will be described.

<First Embodiment>
In this embodiment, a urine panty liner 1 will be described as an example of a worn article. FIG. 1 is a plan view of a panty liner 1 with a part thereof broken away, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. The panty liner 1 includes a vertical direction Y and a horizontal direction X perpendicular to the vertical direction Y, and is formed vertically long in the vertical direction Y. The panty liner 1 includes a top sheet 11 positioned on the body side, a back sheet 12 positioned on the clothing side such as the panty opposite to the body side, and a first sheet formed between the sheets 11 and 12. The absorber 20 and the 2nd absorber 30 are included. The first absorbent body 20 and the second absorbent body 30 form the liquid absorbing structure of the present invention. The top sheet 11 and the back sheet 12 are preferably joined in a watertight manner through a joint 13 around the top sheet 11 and the back sheet 12.

  The first absorbent body 20 and the second absorbent body 30 are stacked on each other and joined by the joining means 40, the first absorbent body 20 is located on the top sheet 11 side, and the second absorbent body 30 is the back sheet 12. Located on the side. The first absorbent body 20 is formed in a substantially rectangular shape as a whole, and includes first side edges 21 and 21 extending in the vertical direction Y and first front and rear end edges 22 and 23 extending in the horizontal direction X. The second absorbent body 30 includes front and rear end extending portions 33 and 34 that extend from at least the first front and rear end edges 22 and 23 of the first absorbent body 20 in the longitudinal direction Y, and the area of the second absorbent body 30. However, the area of the first absorbent body 20 is made larger. The second absorber 30 is preferably joined intermittently to the back sheet 12 via the bonding means 42.

  The first absorbent body 20 includes a liquid-absorbent first core member 24 containing particles or fibers of superabsorbent polymer, and a first sheet 25 that covers the first core member 24, and the first front and rear end edges 22, 23. In the first and second core members 24, front and rear end substantially non-existing regions 26 and 27 are formed. The front and rear end substantially non-existing regions 26 and 27 extend in the lateral direction X along the first front and rear end edges 22 and 23. Existing regions 28 of the first core member 24 are formed in portions other than the front and rear end substantially non-existing regions 26 and 27. Here, the front and rear end substantially non-existing regions 26 and 27 mean a case where there is no liquid-absorbing core material or a case where there is a slight amount that does not have a sufficient liquid-absorbing capacity as an absorber. To do.

  In the first absorbent body 20, an adhesive means 41 such as a hot melt adhesive is intermittently applied to the inside of the first sheet 25, extending in the longitudinal direction Y and spaced apart in the lateral direction X. The first sheet 25 is joined to each other in the thickness direction without substantially interposing the core material in the front and rear end substantially non-existing regions 26 and 27. In this way, the existence region 28 and the front and rear end substantially non-existence regions 26 and 27 can be formed.

  The second absorbent body 30 includes a liquid-absorbing second core material 31 containing particles or fibers of a highly absorbent polymer, and a second sheet 32 that covers the second core material 31. The second absorbent body 30 has a substantially similar shape to the front and back sheets 11, 12, and is formed along the inside of the front and back sheets 11, 12, and the second core material 31 extends over the entirety thereof. Has been placed. The 1st absorber 20 is located in the approximate center of the 2nd absorber 30, and the 1st absorber 20 is made to correspond with a wearer's excretion position.

  The first and second absorbers 20 and 30 as described above are formed with recesses 50 extending in the longitudinal direction Y and having a substantially V-shaped cross section. The cross section of the recess 50 may be substantially U-shaped. Such a recess 50 reaches the second absorbent body 30 via the top sheet 11 and the first absorbent body 20 in the thickness direction. Further, the recess 50 extends in the longitudinal direction Y from the presence region 28 of the first absorber 20 to the front end extension portion 33 of the second absorber 30 via the front end substantially non-existence region 26. That is, one end 51 of the recess 50 is located in the existence region 28, and the other end 52 is located in the front end extension portion 33. Such a recessed part 50 can form the part by a heating pressing process.

  As shown in FIG. 2, the recess 50 squeezes the first core member 24 in the presence region 28 of the first absorbent body 20, and also squeezes the second core member 31 of the second absorbent body 30. The top sheet 11 reaches the first absorbent body 20 and the second absorbent body 30. Thus, in the part by which the 1st and 2nd core materials 24 and 31 were squeezed, a density becomes high and a bodily fluid can be rapidly passed by the capillary action there. Therefore, the body fluid quickly moves to the second absorber 30 farthest from the body through the recess 50 and does not stay on the body side of the top sheet 11. When the body fluid stays in the top sheet 11 for a long time, it is easy to induce skin troubles such as rash, but this can be suppressed.

  As shown in FIG. 3, in the front end substantially non-existing region 26 of the first absorbent body 20, the recess 50 is in contact with the first sheets 25 positioned above and below in the thickness direction. 25 and the surface sheet 11 are in contact with each other, and the second absorbent core 30 is compressed with the second core material 31. In such a recess 50, body fluid is quickly absorbed into the second absorbent body 30 via the top sheet 11 and the first sheet 25. The second core material 31 that has absorbed the body fluid expands in the vertical direction Y, the horizontal direction X, and the thickness direction, but the core material does not exist in the front end substantial absence region 26. Therefore, only the second core material 31 of the second absorbent body 30 expands, and the amount of expansion is small compared to the case where any of the liquid absorbent core materials of the first and second absorbent bodies 20 and 30 expands. It can suppress that the shape of the recessed part 50 collapses. By maintaining the shape of the concave portion 50 without collapsing, the high-density portion of the second absorbent body 30 formed by pressing is also maintained, and the body fluid on the topsheet 11 side is quickly maintained in the second absorbent body 30. be able to.

In particular, at the front and rear end edges 22 and 23 or both side edges 21 and 21 of the first absorbent body 20, the expansion allowance of the first core member 24 is reduced, the width of the recess 50 is reduced, and the depth in the thickness direction is increased. The shape of the recessed part 50 is easy to collapse by narrowing. However, since the front and rear end substantially non-existing regions 26 and 27 are formed at the front and rear end edges 22 and 23 and the concave portion 50 is formed so as to overlap the front end substantially non-existing region 26, The collapse of the shape of the recess 50 can be suppressed.
Moreover, since the recessed part 50 was formed in the 1st absorber 20 and the 2nd absorber 30, and this recessed part 50 was formed by the pressing process, the twist of the 1st core material 24 and the 2nd core material 31 is suppressed. The first and second absorbers 20 and 30 can be shaped.

Since the area of the second absorber 30 is larger than that of the first absorber 20 and the second core material 31 is present in the portions corresponding to the front and rear end substantially non-existing regions 26 and 27, The bodily fluid that has not been absorbed in the end substantially non-existing regions 26 and 27 can be absorbed by the second core material 31, and the absorption ability of the entire worn article can be ensured.
Since the core material does not exist in the front and rear end substantially non-existing regions 26 and 27, the body fluid quickly passes through the first absorbent body 20 and is absorbed by the second core material 31 of the second absorbent body 30 far from the body side. The Therefore, it can suppress that a bodily fluid adheres to a body for a long time.

  As the top sheet 11, a liquid-permeable fiber nonwoven fabric or the like can be used, and as the back sheet 12, a liquid-impervious film or the like can be used. As the first and second sheets 25 and 32, a liquid diffusible tissue paper or the like can be used. As the first core material 24 and the second core material 31, superabsorbent polymer particles are used, but other core materials such as pulp can be used as long as they have liquid absorbency. It can also be used in combination.

  In this embodiment, the recess 50 is formed only on the front end substantially non-existing region 26 side, but a similar recess can be formed also on the rear end substantially non-existing region 27 side. Further, the recess 50 may be extended in the longitudinal direction Y so as to reach from the front end substantially non-existing region 26 to the rear end substantially non-existing region 27 beyond the existing region 28. The recess 50 may be formed not only in a single line but also in a plurality of lines.

<Second Embodiment>
FIG. 4 is a front view of the panty liner 1 according to the second embodiment, and a part thereof is broken for explanation. The second embodiment is different from the first embodiment in the position where the recess 50 is formed, and other components are the same as those of the first embodiment. About the same component, the same code | symbol as 1st Embodiment is used, and detailed description is abbreviate | omitted.

As illustrated, in the first absorbent body 20, front and rear end substantially non-existing regions 26 and 27 and both side substantially non-existing regions 29 are formed as regions where the first core member 24 does not exist. The front and rear end substantially non-existing regions 26 and 27 are formed to extend in the lateral direction X along the first front and rear end edges 22 and 23 of the first absorbent body 20, and both side substantially non-existing regions 29 are formed on the first both sides. It is formed to extend in the longitudinal direction Y along the edge 21. That is, a substantially non-existing region is formed outside the existence region 28 in the vertical direction Y and the lateral direction X.
The second absorbent body 30 includes front and rear end extending portions 33 and 34 that extend from the first front and rear end edges 22 and 23 of the first absorbent body 20 to the outside in the longitudinal direction Y, and the first lateral edges 21 and the lateral direction X outside. And extending on both sides 35.

  The concave portion 50 extends in the lateral direction X. Specifically, the concave portion 50 extends from the presence region 28 of the first core member 24 of the first absorber 20 through the substantially non-existence regions 29 on both sides. It extends to both side extending portions 35. The recesses 50 are formed at four positions apart from each other in the vertical direction Y and the horizontal direction X, one end 51 thereof is located in the existence region 28, and the other end 52 is located in both side extending portions 35 of the second absorbent body 30. Yes.

  Thus, even if the shape of any one of the recesses 50 is destroyed by forming a plurality of the recesses 50 apart in the vertical direction Y and the horizontal direction X, the other body portion absorbs the body fluid by the other recesses 50. It can be transferred to the body 30. Therefore, it can suppress that a bodily fluid stagnates for a long time in the surface sheet 11 shape, and can prevent the skin trouble caused by a bodily fluid contacting skin.

<Third Embodiment>
5 shows a third embodiment of the present invention. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII in FIG. In this embodiment, two recesses 50 extending in the longitudinal direction Y are formed, and a central substantially nonexistent region 60 is formed at a position corresponding to the recess 50 of the first absorbent body 20. . Other components are the same as those in the first and second embodiments, and the description of these similar components is omitted.

As shown in the drawing, the first absorbent body 20 includes front and rear end substantially non-existing regions 26 and 27 extending in the lateral direction X along the first front and rear end edges 22 and 23, and first side edges 21 and 21. Thus, both substantially non-existing regions 29 and 29 extending in the longitudinal direction Y are formed.
Two recesses 50 are formed, extend in the vertical direction Y, and are spaced apart in the horizontal direction X. These recesses 50 extend from the front end edge 22 and are positioned at the one end 51 positioned at the front end extension 33 of the second absorber 30 and at the rear end extension 34 of the second absorber 30 extending from the rear end edge 23. And the other end 52 extending from the front end substantially non-existing region 26 to the rear end substantially non-existing region 27 through the existing region 28. However, in the presence region 28, a central substantially non-existence region 60 is formed at a position corresponding to the recess 50.

  In the central substantially non-existing region 60, the first core member 24 is not formed at a position corresponding to the recess 50. Since the recess 50 is formed extending in the vertical direction Y and spaced apart in the horizontal direction X, the central substantially nonexistent region 60 is also formed extending in the vertical direction Y and spaced apart in the horizontal direction X. However, the central substantially nonexistent region 60 is present not only when the first core member 24 is not present at all, similarly to the front and rear end substantially nonexistent regions 26 and 27 and the both side substantially nonexistent regions 29. However, the case where the amount is smaller than that of the other existing region 28 is included.

  In such a central substantially non-existing region 60, the first sheet 25 forming the first absorbent body 20 is directly joined. That is, in the first absorbent body 20, the first core material 24 does not exist over the entire area corresponding to the recess 50. Therefore, even if the body fluid is absorbed by the first core member 24 and the first core member 24 expands in the existence region 28, the shape of the recess 50 does not collapse. Further, in the central substantially non-existing region 60 where the first core material 24 does not exist, the second core material 31 of the second absorbent body 30 exists on the lower layer side thereof, so that the second core material 31 is substantially in the center. The body fluid in the non-existing region 60 can be absorbed.

  In the first to third embodiments, the recess 50 is formed to extend in the vertical direction Y or the horizontal direction X. By extending in this way in the vertical direction Y or the horizontal direction X, the flow of body fluid is physically controlled. It can act as a barrier to block. Therefore, the formation of the recess 50 can suppress leakage of body fluid from the worn article. The recess 50 is not limited to one extending vertically or horizontally in one direction, but may be one having a corrugated shape or an annular shape.

  In this invention, although it is supposed that the recessed part 50 is formed by a pressing process, other well-known techniques can be used. As the bonding means 40 and 41, a conventional technique such as an adhesive, thermal or ultrasonic bond can be used. Moreover, although a liquid-impervious plastic film etc. can be used as the back surface sheet 12, the fiber nonwoven fabric which considered the touch can also be further formed in the clothing side of the back surface sheet 12. FIG.

The front view of the panty liner of 1st Embodiment. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG. The front view of the panty liner of 2nd Embodiment. The front view of the panty liner of 3rd Embodiment. VI-VI sectional view taken on the line of FIG. VII-VII line sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panty liner 11 Top sheet 12 Back sheet 20 1st absorber 21 1st both-sides edge 22 1st front-end edge 23 1st back end edge 24 1st core material 26 Front end substantial non-existence area 27 Rear end substantial non-existence area 28 Existence area 29 Both sides substantially non-existence area 30 2nd absorber 31 2nd core material 33 Front end extension part 34 Rear end extension part 35 Both sides extension part 50 Recessed part 60 Central substantially non-existence area

Claims (7)

A longitudinal direction and a lateral direction; a first absorbent body and a second absorbent body; wherein the first absorbent body comprises a liquid-absorbent first core material; and the second absorbent body comprises a liquid-absorbent first core. In a liquid-absorbing structure of a wearing article that includes a two-core material and has a recess formed in the thickness direction of the first absorbent body and the second absorbent body,
The first absorbent body includes first side edges extending in the vertical direction, first front and rear end edges extending in the horizontal direction, a region where the first core material is present, the first side edges and the first front and rear ends. A substantially non-existing region of the first core formed on at least one of the edges,
The second absorber includes an extending portion that extends from at least one of the first front and rear end edges and the first both side edges,
The liquid-absorbing structure, wherein the recess extends from the existence region of the first absorber to the extension portion of the second absorber through the substantially non-existence region.   The liquid-absorbing structure according to claim 1, wherein the existence region includes a central substantially non-existence region where the first core material is not formed in a portion corresponding to the recess.   The liquid absorption structure according to claim 1, wherein the concave portion is formed by a pressing process.   The liquid absorption structure according to claim 1, wherein the concave portion extends in at least one of the vertical direction and the horizontal direction.   The liquid absorption structure according to claim 1, wherein a plurality of the recesses are formed.   The liquid absorbing structure according to any one of claims 1 to 5, wherein the second absorbent body has a second core material at a position corresponding to the substantially non-existing region. A wearing article comprising the liquid absorbing structure,
A top sheet positioned on the wearer's body side, and a back sheet positioned on the opposite side of the body side, wherein the first absorber is positioned on the top sheet side, and the second absorber is The said wearing article characterized by being located in the back surface sheet side.

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