JP4580740B2 - Absorbent pad - Google Patents

Description

  The present invention relates to an absorbent pad, and more particularly, to a disposable absorbent pad excellent in fit to the body of a pad wearer.

Conventionally, this kind of absorptive pad is well-known, and comprises a liquid-absorbent core from a central core piece and a pair of side core pieces disposed on both sides thereof (see Patent Document 1) Are intermittently arranged in the front-rear direction and the width direction of the absorbent pad, and the density of the liquid-absorbent core in the intermittent region between the end portions of the streak aligned in the front-rear direction is determined. The liquid absorbent core is improperly twisted or unevenly distributed when subjected to pressure from the lateral direction by making it larger than the density of the liquid absorbent core in other parts (see Patent Document 2). Disposable absorbent pads that prevent this are also well known.
Japanese Patent No. 2909882 Japanese Patent No. 3208289

  However, in the absorbent pad disclosed in Patent Document 1, when a compressive force is applied from the width direction, each of the side core pieces is displaced inward in the width direction and enters the lower side of the central core piece. Even if leakage to both sides in the width direction can be prevented, there is a problem that the pad cannot be in close contact with the wearer's body. Moreover, when the absorbent pad disclosed in Patent Document 2 receives pressure from the width direction, the pad may be bent in a U shape over the entire width, and does not necessarily adhere to the wearer's body. There is.

  The present invention has been made in view of the above-described problems, and even when subjected to pressure from the width direction, the liquid-absorbent core is not inappropriately twisted and fits to the wearer's body. It aims at providing the absorptive pad excellent in property.

The absorbent pad according to the present invention for solving the above-described problems is a vertical axis, a horizontal axis, a first surface that absorbs body fluid, a second surface opposite to the first surface, and the vertical axis. A pair of first and second flexible shafts and a first flexible shaft that are separated from each other in the direction of the horizontal axis and extend in the direction of the vertical axis; And a third flexible shaft extending in the direction of the longitudinal axis between the second flexible shaft includes a through-hole that lacks absorbent fibers, and the through-hole is located exclusively in the front region. The through-holes are intermittently formed in the direction of the longitudinal axis by the intermittent portion, and the intermittent portion has a thickness dimension of the absorbent fibrous structure in the thickness of the absorbent fibrous structure in other portions. Smaller than the height dimension, and the intermittent portion has the same density as the absorbent fiber structure in the other portion. And in the intermittent portion in the first and second flexible shaft is formed recessed from the first surface, the discontinuous portion of the third flexible shaft is formed recessed from the second surface It is characterized by that.

  In this way, the first and second flexible shafts are exclusively located in the front area of the absorbent pad that is sandwiched between the wearer's crotch, so that the absorbent pad is subjected to lateral pressure. When deformed, the front region deforms along the first and second flexible axes without an inappropriate twist and fits snugly to the wearer's body, while the rear region Covers the wearer's body leaving a room without deformation. As a result, the absorbent pad can effectively prevent leakage of bodily fluids in the front region, and can accommodate solid excrement such as feces in the rear region without pressing against the wearer's body.

  The thickness dimension of the absorbent fiber structure should be sufficient to absorb a sufficient amount of body fluid and not cause the wearer to feel discomfort when the absorbent pad is sandwiched between the wearer's crotch. However, it is preferably 3 to 25 mm.

  In order for the absorbent pad to better fit the wearer's body, the pair of first and second flexible axes are preferably substantially parallel.

  The distance between the first and second flexible shafts may be determined as appropriate according to the width of the crotch of the wearer, but it improves the fit of the absorbent pad to the wearer's body and improves the feeling of wearing when worn. In order to do this, it is preferable that it is 100 mm or less.

The third flexible shaft extends in the direction of the longitudinal axis between the first and second flexible shafts and is exclusively located in the front region, in particular the complex shape of the female wearer It is possible to improve the fit of the absorbent pad.
At this time, the third flexible shaft is located inward of both ends of the first and second flexible shafts in the direction of the vertical axis, and approximately halfway between the first and second flexible shafts in the direction of the horizontal axis. In addition, it is more preferable to improve the fit of the absorbent pad to the wearer's body to be substantially parallel to the first and second flexible axes.

Since the first, second and third flexible shafts include through-holes, the surface area of the absorbent fiber structure can be increased, and the body fluid absorption capacity of the absorbent pad can be improved. A hole becomes a partition of an absorptive fiber structure and can prevent uneven distribution of the fiber in an absorptive fiber structure.
The shape of the through-holes seen from the first surface and the second surface of the absorbent pad is not particularly limited, and any shape such as a rectangular shape or an oval shape can be adopted. The through-strip hole as the first flexible shaft, the through-strip hole as the second flexible shaft, and the through-strip hole as the third flexible shaft may have the same shape and size, or different shapes. And may be of a size.

  The length dimension of the through-hole in the direction of the vertical axis may be appropriately determined according to the size of the absorbent pad so that the position of the through-hole is easily coincident with the position of the wearer's genital area. It is preferably 10 to 60% of the length dimension of the absorbent fiber structure in the axial direction, and more preferably 20 to 40%. When the length of the through-hole is smaller than 10% of the length of the absorbent fiber structure, the body fluid flows into the through-hole due to the presence of the through-hole, and only the first surface side of the absorbent pad. In addition, it is not possible to sufficiently obtain the effect of being absorbed on the second surface side. When the length dimension of the through-hole is larger than 60% of the length dimension of the absorbent fiber structure, the absorbent fiber structure in the portion located on the outer side in the horizontal axis direction of the pair of through-holes during wearing, The part located on the inner side in the horizontal axis direction of the pair of through-holes can easily enter the lower side of the absorbent fiber structure, and the fit of the absorbent pad wearer to the body may be reduced.

  The width dimension of the through-holes in the direction of the horizontal axis may be appropriately determined according to the thickness dimension of the absorbent fiber structure while taking into account the ease of bending of the absorbent pad. In the absorbent fiber structure having a thickness dimension of ˜25 mm, the width dimension of the through-holes is preferably 5 to 30 mm. When the thickness of the absorbent fiber structure is 3 to 25 mm and the width of the through-hole is in the range of 5 to 30 mm, when the absorbent pad receives pressure from the direction of the horizontal axis As a result, the through-holes are less likely to be crushed, and as a result, the portion that comes into contact with the wearer's genital region is unlikely to become wet, and the wearer can be effectively prevented from feeling uncomfortable. When the width of the through-hole is smaller than 5 mm, the through-hole is easily crushed when the absorbent pad is bent, and the effect obtained by the presence of the through-hole, that is, body fluid flows into the through-hole. Thus, the effect of being absorbed not only on the first surface side but also on the second surface side of the absorbent pad cannot be obtained sufficiently. When the width dimension of the through-hole is larger than 30 mm, it is difficult for body fluid to be quickly absorbed by the absorbent pad.

The through-holes are intermittently formed in the direction of the longitudinal axis by the intermittent portion. The intermittent portion has a thickness dimension of the absorbent fiber structure that is different from the thickness dimension of the absorbent fiber structure in the other portions. And is the same as the density of the absorbent fiber structure in the other portions, so that when the absorbent pad is subjected to pressure from the lateral direction during wearing, it is curved in a U shape over the entire width, or excessively reliably prevent or bent. Since the through-hole includes the intermittent portion, the body fluid absorbed by the absorbent fiber structure is transmitted to both sides of the through-hole through the intermittent portion, so that the entire absorbent fiber structure is effectively used. Can be used .

At this time, it is preferable that the length dimension of the intermittent part in the direction of the vertical axis is 10 to 50% of the length dimension of the entire through-hole in the direction of the vertical axis. If the length dimension of the interrupted portion is shorter than 10% of the length dimension of the through-hole, the effect of controlling the direction in which the absorbent pad bends due to the interrupted portion cannot be sufficiently obtained, It is also impossible to sufficiently obtain the effect that the body fluid absorbed by the absorbent pad is transmitted in the width direction through the intermittent portion. If the length of the interrupted portion is longer than 50% of the length of the through-hole, body fluid flows into the through-hole and is absorbed not only on the first surface side but also on the second surface side of the absorbent pad. This effect cannot be obtained sufficiently.
Each part of the through-holes divided by the interrupting part may have the same shape and size, or may be different from each other. In order to prevent the absorbent pad wearer from feeling wet by transferring the body fluid that has flowed into the through-holes to a farther part of the absorbent fiber structure, any part of the divided through-holes may be used. Is more preferable that the length dimension in the direction of the vertical axis is 20 mm or more.

The thickness dimension of the absorbent fiber structure in the intermittent portion may be the same as or different from the thickness dimension of the absorbent fiber structure in the other part. If they are different, it is preferable that the thickness dimension of the absorbent fiber structure in the interrupted portion is smaller than the thickness dimension of the absorbent fiber structure in the other part, and the absorbent fiber structure in the other part. More preferably, it is in the range of 20 to 80% of the thickness dimension. Thereby, the through-hole including the intermittent portion serves as a guide for a series of bends in the direction of the vertical axis, and the absorbent fiber structure is easily bent along it. When the thickness dimension of the absorbent fiber structure in the interrupted portion is smaller than 20% of the thickness dimension of the absorbent fiber structure in the other portion, the effect obtained by the presence of the interrupted portion, that is, the absorbent pad The effect of controlling the bending direction and the effect that the body fluid absorbed by the absorbent pad is transmitted in the width direction through the intermittent portion cannot be sufficiently obtained. If the thickness dimension of the absorbent fiber structure at the interrupted portion is larger than 80% of the thickness dimension of the absorbent fiber structure at other portions, the absorbent fiber structure is difficult to bend along the through-holes. The fit of the absorbent pad to the wearer's body cannot be sufficiently enhanced.
The absorbent fiber structure includes a groove recessed from the first surface side in the intermittent portion included in the through-hole as the first and second flexible shafts, and the through-hole as the third flexible shaft Since the intermittent portion included in the groove includes a groove recessed from the second surface side, the absorbent pad is easy to bend in an inverted U shape over the entire width, and improves the fit of the absorbent pad to the wearer's body Can do.

  The intermittent portion may be at one location or at multiple locations, but when the through-holes include the intermittent portions at multiple locations, the direction of the vertical axis of the intermittent portion included in each through-hole The total length dimension is preferably in the range of 10 to 50% of the length dimension in the direction of the vertical axis as the whole through-hole, and more preferably 20 to 40%.

  The absorbent fiber structure may have a single-layer structure or a multi-layer structure, but in the case of a multi-layer structure, a two-layer structure of an upper layer and a lower layer is preferable. If the absorbent fiber structure has a two-layer structure of an upper layer and a lower layer, the absorbent fiber structure in which the thickness dimension of the absorbent fiber structure at the interrupted portion is smaller than the thickness dimension of the absorbent fiber structure at other portions It is easy to manufacture the body.

  The first surface is preferably liquid permeable, and more preferably formed of a liquid permeable sheet. The second surface is preferably hydrophobic and more preferably treated with a water repellent or formed of a hydrophobic sheet. Thereby, the absorbent pad absorbs body fluid on the first side and prevents the absorbed body fluid from leaking on the second side.

The absorbent pad may be composed only of an absorbent fiber structure that absorbs bodily fluids, but in order to easily constitute an absorbent pad in which the first surface has liquid permeability and the second surface has hydrophobicity. It is preferable to consist of a liquid-permeable sheet located on the first surface, a hydrophobic sheet located on the second surface, and a liquid-absorbent core interposed between both sheets.
Here, as a material for forming the liquid-permeable sheet, the hydrophobic sheet, and the liquid-absorbent core, generally known materials can be used without particular limitation.

  In the front area where the first and second flexible shafts are exclusively positioned, the absorbent pad according to the present invention is not twisted inappropriately when subjected to pressure from the lateral direction. It can be easily deformed along the second flexible axis to fit the wearer's body and prevent fluid leakage, and at the same time, in the rear area, the wearer's body can be covered without sticking, Such solid excreta can be accommodated without being pressed against the wearer's body.

  For other configurations, materials, and the like of the present invention, descriptions in the embodiments are incorporated herein. However, the present invention is not limited to the embodiment.

  An embodiment of the present invention will be described with reference to the drawings as follows.

( First reference embodiment )
FIG. 1 is a partially broken plan view of an absorbent pad according to a first reference embodiment of the present invention as viewed from the surface side. 2 is a cross-sectional view taken along line 2-2 of FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 2 showing the absorbent pad in a worn state.
As shown in FIG. 1, the absorbent pad comprises an absorbent fibrous structure 20. The absorbent fiber structure 20 includes a vertical axis 21, a horizontal axis 22 orthogonal thereto, a surface (first surface) 23 that absorbs body fluid, a back surface (second surface) 24 on the opposite side, and a vertical axis 21. The front region 25a and the rear region 25b are arranged in the direction of, and mainly include a liquid-permeable top sheet 23a that forms the front surface 23, a hydrophobic back sheet 24a that forms the back surface 24, and an intermediate between both sheets. And a liquid-absorbing core 26.
The absorbent fiber structure 20 further includes a pair of barrier cuffs 27 extending in the direction of the vertical axis 21 in the vicinity of both side edges of the liquid absorbent core 26 in the direction of the horizontal axis 22. Both ends of the barrier cuff 27 in the direction of the longitudinal axis 21 and the outer proximal edge in the direction of the lateral axis 22 are joined to the top sheet 23a (see FIG. 2). An elastic member 28 such as rubber thread is attached to the inner distal edge of the barrier cuff 27 in the direction of the horizontal axis 22, whereby the barrier cuff 27 has an upright orientation (see FIG. 2).
The top sheet 23a and the back sheet 24a are joined at portions that extend from the periphery of the liquid-absorbent core 26 and overlap each other (see FIG. 2).

The top sheet 23a is formed from a known thermoplastic synthetic fiber nonwoven fabric having a basis weight of 15 to 35 g / m ² . Examples of the thermoplastic synthetic fiber include those manufactured from synthetic resins such as polyolefins, polyesters, and polyamides.
The back sheet 24a is formed from a known liquid resistant thermoplastic film having a basis weight of 10 to 100 g / m ² . Examples of the material for this film include polyolefin-based synthetic resins.

The liquid absorbent core 26 is formed from a mixture of fluff pulp, superabsorbent polymer particles, and, in some cases, thermoplastic synthetic fibers, and the content of the superabsorbent polymer particles is 20 to 30%. From the viewpoint of ease of molding and the like, the basis weight of the liquid absorbent core 26 is preferably 200 g / m ² or more. Although not shown, the liquid-absorbent core 26 may be configured by being covered with a liquid diffusive sheet such as tissue paper and compressed as appropriate for the purpose of preventing deformation. The absorbent core 26 constituting the absorbent fiber structure 20 has a length dimension L in the direction of the vertical axis 21 of 350 to 700 mm, a width dimension W in the direction of the horizontal axis 22 of 100 to 400 mm, and a thickness dimension H. It is formed to be 3 to 25 mm.

The barrier cuff 27 is formed from a known thermoplastic synthetic fiber composite nonwoven fabric having a basis weight of 10 to 100 g / m ² . Examples of the thermoplastic synthetic fiber include those manufactured from synthetic resins such as polyolefins, polyesters, and polyamides.

  The absorbent pad includes a pair of through-holes (first and second flexible shafts) 31 and 32 that are spaced apart from each other in the direction of the horizontal axis 22 and extend in the direction of the vertical axis 21. The pair of through-holes 31 and 32 are exclusively located in the front region 25a. That is, in the absorbent pad according to the present embodiment, approximately the vertical half including the pair of through-holes 31 and 32 is the front region 25a, and the rest is the rear region 25b.

The pair of through-holes 31 and 32 are substantially parallel to each other and extend linearly continuously in the direction of the longitudinal axis 21. The separation dimension P between the pair of through-holes 31 and 32 is preferably 100 mm or less. The lengths L1 and L2 of the through-holes 31 and 32 in the direction of the vertical axis 21 are 35 to 420 mm corresponding to 10 to 60% of the length L of the liquid absorbent core 26 in the direction of the vertical axis 21. It is preferable that it exists in the range of 70-280 mm corresponding to 20 to 40% of the same dimension L, and it is more preferable. The width dimensions W1 and W2 of the through-holes 31 and 32 in the direction of the horizontal axis 22 are preferably 5 to 30 mm.
As shown in FIG. 2, in the through-holes 31 and 32, the absorbent fiber structure 20 substantially lacks absorbent fibers.
In FIG. 2, the top sheet 23 a and the back sheet 24 a extend flat on the front surface 23 and the back surface 24 to cover the through-holes 31, 32, but the top sheet 23 a and the back sheet 24 a include the liquid-absorbing core 26. It may extend along the outer shape of each other, overlap each other inside the through-holes 31 and 32, and may be joined.

As shown in FIG. 3, the absorbent pad according to the present embodiment is easily bent along a pair of through-holes, and the absorbent fiber structure is inappropriate even when subjected to pressure from the lateral direction. It is possible to prevent the absorbent fibers from being unevenly distributed beyond the through-holes.
Moreover, since this absorbent pad is provided with through-holes, the absorbent fiber structure has a large surface area and a high body fluid absorption capacity.

  The absorbent pad can be manufactured by a conventionally known technique. The through-holes can be formed by using a mold that forms a predetermined pattern in the molding process of the liquid-absorbent core and providing a portion where the fluff pulp is not deposited. May be formed by die cutting.

  The absorbent pad is preferably used with a disposable diaper or diaper cover or other underwear rather than used alone and does not necessarily require a means to secure it to the wearer's body.

( Second reference embodiment )
FIG. 4 is a partially cutaway plan view corresponding to FIG. 1 of the absorbent pad according to the second embodiment of the present invention. 5 is a cross-sectional view taken along line 5-5 of FIG. FIG. 6 is a partially cutaway plan view corresponding to FIG. 4 showing a modification of the absorbent pad according to the second reference embodiment .
In the absorbent pad according to the second reference embodiment , the same main members and parts as those according to the first reference embodiment are denoted by the same reference numerals, and description thereof is omitted.
The difference between the absorbent pad according to the second reference embodiment and that according to the first reference embodiment is that the pair of through-holes 31 and 32 extend intermittently in the direction of the longitudinal axis 21, respectively. 41a and 42a are included.

The lengths L1 and L2 of the through-holes 31 and 32 are preferably within a range of 35 to 420 mm corresponding to 10 to 60% of the length L of the absorbent core 26. More preferably, it is in the range of 70 to 280 mm corresponding to 20 to 40%.
The intermittence portions 41a and 42a are located substantially at the center of the through-holes 31 and 32 in the direction of the vertical axis 21, respectively. The length dimensions M1a and M2a in the direction of the longitudinal axis 21 of the interrupting portions 41a and 42a are both within a range of about 4 to 210 mm corresponding to 10 to 50% of the length dimensions L1 and L2 of the through-holes 31 and 32. It is preferable that it is within a range of 7 to 168 mm corresponding to 20 to 40% of the same dimensions L1 and L2. In the absorbent pad shown in FIG. 4, the lengths of the portions of the through-holes 31 and 32 divided by the interrupting portions 41 a and 42 a are equal, and are within the range of about 9 to 189 mm, respectively. Preferably, it exists in the range of 20-189 mm.
In the interrupted portions 41a and 42a, the thickness dimension H1a and H2a of the liquid absorbent core 26 are both smaller than the thickness dimension H of the liquid absorbent core 26 in the other portions, corresponding to 20 to 80% of the same dimension H. It is preferable that it exists in the range of 0.6-20 mm to do. The liquid-absorbent core 26 includes grooves that are recessed from the surface 23 side in the interrupted portions 41a and 42a (see FIG. 5).

  As shown in FIG. 6, the through-holes 31 and 32 may include intermittent portions 41 a, 41 b, 42 a, and 42 b at two locations, respectively. The sum of the lengths M1a and M1b of the intermittence portions 41a and 41b included in the through-strand hole 31 and the sum of the length dimensions M2a and M2b of the intermittence portions 42a and 42b included in the through-strand hole 32 are both through-strand holes. It is preferable to be within a range of about 4 to 210 mm corresponding to 10 to 50% of the length dimensions L1 and L2 of 31 and 32, and within a range of 7 to 168 mm corresponding to 20 to 40% of the same dimensions L1 and L2. More preferably. In the absorbent pad shown in FIG. 6, the lengths of the portions of the through-holes 31 and 32 divided by the interrupting portions 41 a, 41 b, 42 a and 42 b are equal, and each is within a range of about 6 to 126 mm. It is preferable that it exists in the range of 20-126 mm. The thickness dimension of the liquid-absorbent core 26 in the intermittent portions 41a, 41b, 42a, 42b is 0.6-20 mm, which corresponds to 20-80% of the thickness dimension H of the liquid-absorbent core 26 in the other parts. It is preferable to be within the range.

  The through-hole extends intermittently in the direction of the longitudinal axis and includes an intermittent portion, and is located exclusively in the front area of the absorbent pad so that the absorbent pad can be When subjected to pressure from the direction, it not only bends along the through-holes, making it easier to fit the wearer's body, but also the body fluid is transmitted to the entire absorbent core via the interrupted portion, The effect that the liquid core can be used effectively is obtained. It is more preferable that the through-holes include intermittent portions at a plurality of locations because the effect is increased. Furthermore, since the absorbent core includes a groove recessed from the surface side in the interrupted portion, the through-hole serves as a guide for a series of bends in the direction of the vertical axis, and the absorbent pad is worn while wearing When subjected to pressure from the lateral direction, the entire width is easily bent in an inverted U shape, and the fit of the absorbent pad to the wearer's body is further increased.

( Example of embodiment )
FIG. 7 is a partially cutaway plan view corresponding to FIG. 1 of an absorbent pad according to an example of an embodiment of the present invention. 8 is a cross-sectional view taken along line 8-8 in FIG. 7, and FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. FIG. 10 is a cross-sectional view corresponding to FIG. 9 showing the absorbent pad in a worn state.
In the absorbent pad according to this embodiment , the same main members and parts as those according to the first reference embodiment are denoted by the same reference numerals, and description thereof is omitted.
The absorbent pad according to this embodiment is different from that according to the first reference embodiment in that a further third through-hole (third flexible shaft) 33 is vertically disposed between the pair of through-holes 31 and 32. It extends in the direction of the shaft 21 and is exclusively located in the front region 25a, and the through-holes 31, 32, 33 include the intermittent portions 41a, 42a, 43a, respectively.

As shown in FIG. 8, the through-holes 31 and 32 extend substantially in parallel with the direction of the longitudinal axis 21, and the separation dimension P between the through-holes 31 and 32 is preferably 100 mm or less. The through-hole 33 is inside the both ends of the through-holes 31, 32 in the direction of the vertical axis 21, is located approximately in the middle of the through-holes 31, 32 in the direction of the horizontal axis 22, and is in the direction of the vertical axis 21. And extending substantially parallel to the through-holes 31 and 32.
Both of the length dimensions L1 and L2 of the through-holes 31 and 32 are within a range of 35 to 420 mm corresponding to 10 to 60% of the length dimension L of the liquid absorbent core 26 in the direction of the vertical axis 21. Preferably, it is more preferably within a range of 70 to 280 mm corresponding to 20 to 40% of the same dimension L. In order to improve the fit of the absorbent pad to the wearer's body, the length dimension L3 of the through-hole 33 is smaller than the length dimension of the through-holes 31, 32, and the length L of the absorbent core 26 is increased. It is preferable that it exists in the range of 35-210 mm equivalent to 10-30% of. The width dimensions W1, W2, and W3 of the through-strip holes 31, 32, and 33 in the direction of the horizontal axis 22 are preferably 5 to 30 mm.

  The intermittence portions 41a, 42a, 43a are located approximately at the center of the through-holes 31, 32, 33 in the direction of the vertical axis 21, respectively. The lengths M1a and M2a of the intermittence portions 41a and 42a are preferably both within the range of about 4 to 210 mm corresponding to 10 to 50% of the lengths L1 and L2 of the through-holes 31 and 32. More preferably, it is in the range of 7 to 168 mm corresponding to 20 to 40% of the dimensions L1 and L2. It is preferable that the length dimension M3a of the intermittent part 43a is in the range of about 4 to 105 mm corresponding to 10 to 50% of the length dimension L3 of the through-hole 33 in which the intermittent part 43a is included. In the absorbent pad shown in FIG. 7, the length dimensions of the portions of the through-holes 31 and 32 divided by the intermittence portions 41a and 42a are equal, and are within a range of about 9 to 189 mm, respectively. Is preferable, and it is more preferable that it exists in the range of 20-189 mm. Moreover, it is preferable that the length dimension of each part of the through-hole 33 divided | segmented by the intermittent part 43a is equal, and it exists in the range of about 9-95 mm, respectively, and it exists in the range of 20-95 mm more. preferable. As shown in FIG. 9, the thickness dimensions H1a, H2a, H3a of the absorbent core 26 constituting the absorbent fiber structure 20 in any of the intermittent portions 41a, 42a, 43a are in the other portions. It is preferably smaller than the thickness dimension of the liquid-absorbent core 26 and within a range of 0.6 to 20 mm corresponding to 20 to 80% of the dimension H. The liquid-absorbent core 26 includes grooves that are recessed from the front surface 23 side in the interrupted portions 41 a and 42 a, while the interrupted portion 43 a includes grooves that are recessed from the back surface 24 side.

In addition to the pair of through-strip holes, the absorbent pad further includes a third through-slot extending exclusively in the front region extending in the direction of the longitudinal axis between the pair of through-strip holes. By doing so, the flexibility of the absorbent pad in the front region is increased and the absorbent pad can better fit the wearer's body.
Further, the absorbent pad includes a groove recessed from the front surface side in the intermittent portion included in the pair of through-holes, and a groove recessed from the rear surface side in the intermittent portion included in the third through-hole. By including the absorbent pad, as shown in FIG. 10, the absorbent pad is easily bent so that the cross section in the horizontal axis direction is M-shaped, particularly for the complicated body shape of a female wearer. Makes it easier to fit.

( Third reference embodiment )
FIG. 11 is a partially cutaway plan view corresponding to FIG. 1 of the absorbent pad according to the third embodiment of the present invention. 12 is a cross-sectional view taken along line 12-12 of FIG. 13 is a cross-sectional view taken along line 13-13 of FIG.
In the absorbent pad according to the third reference embodiment , the same main members and parts as those of the absorbent pad according to the first reference embodiment are denoted by the same reference numerals, and description thereof is omitted.
The difference between the absorbent pad according to the third reference embodiment and that according to the first reference embodiment is as follows.

  In the absorbent pad according to the present embodiment, the absorbent fiber structure 20 has a multilayer structure and includes a liquid-absorbent core 26 composed of two layers of an upper layer core 26a and a lower layer core 26b (FIG. 12). , 13), and a pair of through-holes 31, 32 extend intermittently in the direction of the longitudinal axis 21, and include intermittent portions 41a, 42a, respectively. The liquid-absorbent core 26 includes grooves that are recessed from the surface 23 side in the intermittent portions 41a and 42a (see FIG. 13).

  The upper layer core 26a has a bowl-like outer shape constricted substantially at the center in the direction of the longitudinal axis 21, and the lower layer core 26b has a substantially rectangular outer shape (see FIG. 11). The upper layer core 26a and the lower layer core 26b have the same length in the direction of the vertical axis 21 and are formed to be 350 to 700 mm, but the thickness is different, and the thickness of the upper layer core 26a is different. Ha is 1.2 to 10 mm, and the thickness dimension Hb of the lower core 26b is 1.8 to 15 mm.

  The upper layer core 26a has through-holes 31a and 32a, and the lower layer core 26b has through-holes 31b and 32b. The upper layer core 26a and the lower layer core 26b are laminated so that the positions of the through-strip holes 31a and 31b and the positions of the through-strip holes 32a and 32b substantially coincide with each other. The through-strip hole 31 is constituted by 31a and the through-strip hole 31b, and the through-strip hole 32 is constituted by the through-strip hole 32a and the through-strip hole 32b (see FIG. 12).

  It is preferable that the through-hole 31 and the through-hole 32 are substantially parallel, and the distance P between them is 100 mm or less. The lengths L1 and L2 of the through-holes 31 and 32 are preferably in the range of 35 to 420 mm corresponding to 10 to 60% of the length L of the liquid-absorbent core 26. More preferably, it is in the range of 70 to 280 mm corresponding to ˜40%. Both of the width dimensions W1, W2 of the through-strip holes 31, 32 are preferably 5 to 30 mm.

In the intermittent portions 41a and 42a, the upper layer core 26a has a thickness dimension that is substantially zero, while the lower layer core 26b has a thickness dimension that is not different from the other parts. Therefore, in the liquid-absorbent core 26 in which the upper layer core 26a and the lower layer core 26b are laminated, the thickness dimensions H1a and H2a at the interrupted portions 41a and 42a are equal to the thickness dimension Hb of the lower layer core 26b, and the other portions. It is smaller than the thickness dimension H. The liquid-absorbent core 26 includes grooves that are recessed from the surface 23 side in the interrupted portions 41a and 42a.
The lengths M1a and M2a of the interrupted portions 41a and 42a in the direction of the vertical axis 21 are both within a range of about 4 to 210 mm corresponding to 10 to 50% of the lengths L1 and L2 of the through-holes 31 and 32. It is preferable that it is within a range of 7 to 168 mm corresponding to 20 to 40% of the same dimensions L1 and L2. In the absorptive pad shown in FIG. 11, the interrupting portions 41 a and 42 a are located behind the center of the through-holes 31 and 32 in the direction of the vertical axis 21, respectively. Of each part of the through-holes divided by 42a, the length dimension of the part located at the front side is larger than the length dimension of the part located at the rear side. The length dimension of the portion located at the front is preferably within a range of approximately 7 to 154 mm, and the length dimension of the portion located at the rear is preferably within a range of approximately 2 to 35 mm.

As shown in FIGS. 12 and 13, a liquid absorption diffusion sheet 45 is interposed between the top sheet 23 and the upper layer core 26 a, and the lower layer core 26 b is wrapped by the liquid absorption diffusion sheet 45. Thus, the liquid absorption diffusion sheet 45 is interposed between the top sheet 23 and the upper layer core 26a and between the upper layer core 26a and the lower layer core 26b, so that the body fluid is absorbed through the liquid absorption diffusion sheet 45. It diffuses to every corner of the liquid core 26, and local saturation of the body fluid can be prevented in the liquid absorbent core 26.
As the liquid-absorbing diffusion sheet 45, tissue paper or the like can be used, and preferably has a basis weight of 10 to 40 g / m ² or more.

  Regarding the bending resistance of the liquid-absorbent core other than the intermittent portion, the value measured by the taper method based on JIS P8125 is preferably 12 mN · cm or more. If the bending resistance is less than 12 mN · cm, it is difficult for the absorbent core to bend and deform under the pressure from the lateral direction, and the absorbent pad is difficult to fit the wearer's body. . On the other hand, with respect to the bending resistance of the liquid-absorbent core at the interrupted portion, the value measured by the above taper method is preferably 10 mN · cm or less in order to facilitate bending of the absorbent pad along the through-holes. .

Since the liquid-absorbent core has a saddle-like outer shape that is constricted substantially in the center in the direction of the vertical axis, the constricted central portion can easily hit the narrowest portion between the wearer's crotch. As a result, the bending position of the absorbent pad easily matches the position of the wearer's crotch.
When the absorbent fiber structure has a multi-layer structure and includes a liquid-absorbing core composed of two layers of an upper layer core and a lower layer core, the thickness dimension at the intermittent portion of the through-hole is the thickness of the other portion. It is easier to manufacture an absorbent pad having a configuration that is smaller than the size and includes a groove that is recessed from the surface side in the intermittent portion.

It is a partial fracture top view showing an absorptive pad concerning a first reference embodiment of this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 2 of the absorbent pad in a worn state. It is a partially broken plan view corresponding to FIG. 1 showing an absorbent pad according to a second reference embodiment of the present invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 9 is a partially cutaway plan view corresponding to FIG. 4 showing a modification of the absorbent pad according to the second reference embodiment . FIG. 2 is a partially cutaway plan view corresponding to FIG. 1 showing an absorbent pad according to an example of an embodiment of the present invention. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 7. FIG. 10 is a cross-sectional view corresponding to FIG. 9 of the absorbent pad in a worn state. FIG. 4 is a partially cutaway plan view corresponding to FIG. 1 showing an absorbent pad according to a third reference embodiment of the present invention. 12 is a sectional view taken along line 12-12 of FIG. FIG. 13 is a sectional view taken along line 13-13 in FIG. 11.

20 Absorbent fiber structure 21 Vertical axis 22 Horizontal axis 23 Surface (first surface)
23a Top sheet (liquid permeable sheet)
24 Back side (second side)
24a Back sheet (hydrophobic sheet)
25a front region 25b rear region 26 liquid-absorbent core 31, 31a, 31b through-hole (first flexible shaft)
32, 32a, 32b Through-hole (second flexible shaft)
33 Through-hole (third flexible shaft)
41a, 41b, 42a, 42b, 43a Intermittent part

Claims (10)

Absorbent fiber structure having a vertical axis, a horizontal axis, a first surface that absorbs body fluid, a second surface opposite to the first surface, and a front region and a rear region aligned in the direction of the vertical axis A pair of first and second flexible shafts that are spaced apart from each other in the direction of the horizontal axis and extend in the direction of the vertical axis, and extend in the direction of the vertical axis between the first and second flexible shafts The third flexible shaft includes a through hole that lacks absorbent fibers, the through hole being located exclusively in the front region ;
The through-holes are intermittently formed in the direction of the longitudinal axis by an intermittent portion, and the intermittent portion has a thickness dimension of the absorbent fiber structure in other portions, and a thickness dimension of the absorbent fiber structure in other portions. Smaller than
The intermittent portion is the same as the density of the absorbent fiber structure in the other portions,
The said absorptive part in which the said intermittence part in said 1st and 2nd flexible shaft is dented from said 1st surface, and said intermittence part in said 3rd flexible shaft is dented from said 2nd surface pad.   The absorbent pad according to claim 1, wherein the first and second flexible axes are substantially parallel.   The absorbent pad according to claim 1 or 2, wherein a distance between the first and second flexible shafts is 100 mm or less. The length dimension of the through-strip holes in the direction of the longitudinal axis, according to any one of claims 1 to 3 10 to 60% of the length dimension of the absorbent fibrous structure in the direction of the longitudinal axis Absorbent pad. The absorbent pad according to any one of claims 1 to 4 , wherein a length dimension of the intermittent portion in the direction of the vertical axis is 10 to 50% of a length dimension of the through-hole in the direction of the vertical axis. . The absorbent pad according to any one of claims 1 to 5 , wherein the absorbent fiber structure has a multilayer structure. The absorbent pad according to any one of claims 1 to 6 , wherein the first surface is formed of a liquid-permeable sheet. The absorptive pad according to any one of claims 1 to 7 , wherein the second surface has hydrophobicity. The absorbent pad according to any one of claims 1 to 8 , wherein the second surface is formed of a hydrophobic sheet. The absorbent fiber structure comprises a liquid-permeable sheet located on the first surface, a hydrophobic sheet located on the second surface, and a liquid-absorbent core interposed between both sheets . The absorbent pad according to any one of 9 .

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