JP2015217067A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article excellent in absorption performance, capable of suppressing lateral leak by preventing transfer of urine or the like from a wide width part, concerning a double-side absorption type absorbent article provided with the wide width part.SOLUTION: An absorbent article 20 including a liquid-permeable top sheet 2, a liquid-permeable back sheet 4, and an absorber 6 arranged between the top sheet and the back sheet, also has a wide width part extending to the outside in the width direction furthermore than the periphery. The wide width part has a leak prevention property for preventing seepage of liquid.

Description

  The present invention relates to an absorbent article to be worn in an underwear or a diaper such as an incontinence pad, a urine collection pad, or an incontinence liner.

Conventionally, in order to absorb the excrement of adults and sick persons, disposable paper diapers have been used, or absorbent articles such as small (light) incontinence pads and urine collection pads have been used in underwear and diapers. As this type of absorbent article, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a pad type having an absorbent body in between are generally commercialized. In addition, a device in which a wing portion is extended toward both sides in the width direction has been developed (Patent Document 1).
However, since the absorbent article described in Patent Document 1 is a one-sided absorption type that absorbs only from the top sheet on the genital side of the wearer, when the amount of urine is large, it can flow from the backsheet side to the outside. It may not be possible and leakage may occur. For example, the absorbent article of Patent Document 1 extends a leak-proof sheet serving as a back sheet in the width direction to form a wide portion so that urine does not flow outward from the back sheet side.

Here, as shown in FIG. 11, the pad-type absorbent article 200 is mounted in an outer outer (underwear or diaper) 100 as a so-called inner, and the outer 100 itself also has an absorptivity. And it is used so that the inner 200 may be frequently changed, and the outer may be changed when the outer 100 absorbs urine or the like several times.
Therefore, in order to prevent the liquid that could not be absorbed by the inner 200 from leaking, a so-called double-sided absorbent pad has been developed in which both the top sheet side and the back sheet side of the inner 200 are liquid permeable. Thereby, the urine etc. which were not absorbed by the inner 200 can be transferred to the outer 100 through the back sheet.

Japanese Patent Laying-Open No. 2003-126140 (FIG. 2)

  By the way, the pad-type absorbent article serving as the inner part needs to have a substantially oval shape or a substantially rectangular shape in order to be disposed in the outer. And if it is going to raise the absorption capacity of an inner, it is necessary to enlarge the width | variety and length of an absorbent article. Furthermore, in order to improve the wearability and wearing feeling by arranging along the front and back of the wearer's crotch, as shown in FIG. 10, the length is longer than the width at the center in the longitudinal direction corresponding to the crotch part of the inner 200. It is necessary to have an irregular shape (wide shape) provided with a wide portion 210 having a wider width in the front and rear direction.

However, when the inner 200 has a wide shape, there is a problem that the wide portion 210 protrudes from the outer 100 and urine absorbed by the inner 200 is transmitted to the wide portion 210 and oozes out from the outer 100 to cause side leakage. In particular, as shown in FIG. 10, when the outer 100 is a so-called tape-type paper diaper, it is flat when unfolded, and is joined around surface fasteners 107 arranged on both ends in the longitudinal direction. It comes to be attached to. In this tape-type outer 100, the lateral leakage is prevented by the three-dimensional gather 112 in the width direction, so that the wide portion 210 of the inner 200 easily protrudes from the three-dimensional gather 112, and the lateral leakage from the outer 100 is noticeable. Become.
On the other hand, as in the absorbent article described in Patent Document 1, when the wide portion (wide portion) is formed integrally with the back sheet using a leak-proof sheet, it is possible to prevent transmission of urine from the wide portion. Although it can, it does not function as a double-sided absorbent pad in the first place.
Accordingly, an object of the present invention is to provide an absorbent article that is excellent in absorption performance in a double-sided absorption type absorbent article provided with a wide part, and that suppresses side leakage by preventing transmission of urine and the like from the wide part. To do.

In order to solve the above problems, an absorbent article of the present invention includes a liquid-permeable top sheet, a liquid-permeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. The absorbent article has a wide portion extending outward in the width direction from the surroundings, and the wide portion has a leakproof property to prevent liquid from leaching.
Thus, although the absorbent article is a double-sided absorbent pad type, the wide portion has a leak-proof property that prevents the liquid from leaching. For this reason, it is possible to prevent urine or the like absorbed by the absorbent article from being transmitted to the wide portion and soaking out from the outer to cause side leakage. Moreover, since the wide part is provided, even if the absorbent article is enlarged to increase the amount of absorption, it is possible to improve the wearability and the feeling of wear when arranged along the front and back of the wearer's crotch. it can.

  The top sheet and the back sheet are narrower than the absorber, and a leak-proof sheet is disposed extending outward in the width direction so as to overlap with the width direction end portions of the top sheet and the back sheet, respectively. It is preferable that the leak-proof sheets extend outward in the width direction and overlap each other to form the wide portion.

  Either the top sheet or the back sheet extends outward in the width direction as an extension sheet to form the wide portion, and the sheet that does not become the extension sheet of the top sheet or the back sheet is more than the absorber. A leak-proof sheet that is narrow and extends outward in the width direction so as to overlap with the width direction end of the sheet, and the leak-proof sheet overlaps with the extension sheet to constitute the wide portion. Is preferred.

  The top sheet and the back sheet both extend outward in the width direction as extension sheets to form the wide portion, and overlap the top sheet and the back sheet, respectively, in the width direction from the absorber. It is preferable that a leak-proof sheet extending outward in the width direction is disposed, and the leak-proof sheets overlap with the extension sheets to form the wide portion.

It is preferable that the wide part is provided in one or two places in the longitudinal direction.
The width of the wide portion is preferably 250 to 400 mm.
It is preferable that a three-dimensional gather is provided that extends in the longitudinal direction.

  According to the present invention, in the double-sided absorbent type absorbent article provided with the wide portion, the absorption performance is excellent, and the transmission of urine and the like from the wide portion can be prevented to suppress side leakage.

It is a perspective view showing appearance of an absorptive article concerning a 1st embodiment of the present invention. It is a top view of the absorptive article concerning a 1st embodiment. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is a top view of the absorptive article concerning a 2nd embodiment. It is sectional drawing which follows the VI-VI line of FIG. It is sectional drawing which follows the VII-VII line of FIG. It is sectional drawing of the absorbent article which concerns on 3rd Embodiment. It is another sectional view of an absorptive article concerning a 3rd embodiment. It is a perspective view which shows the conventional unusual shape (wide shape) absorbent article (inner).

Hereinafter, the absorbent article which concerns on the 1st Embodiment of this invention is demonstrated. The absorbent article according to the embodiment of the present invention is a so-called “pad type” such as an incontinence pad, an incontinence pad, an incontinence liner, or the like, which is attached to an underwear (underwear) or a diaper. As long as it is attached inside and absorbs excreta and secretions, it is not limited to these uses.
FIG. 1 is a perspective view showing an appearance of an absorbent article according to the first embodiment of the present invention. In FIG. 1, an absorbent article 20 has an elongated piece shape, and has a configuration in which an absorbent body (not shown) is sandwiched between a liquid-permeable top sheet 2 and a liquid-permeable back sheet 4. Further, side sheets (solid gathers) 12 made of a water-repellent nonwoven fabric stand up on the top sheet from both side edges in the width direction of the absorbent article 20. The absorbent article 20 is passed in the longitudinal direction before and after the crotch portion of the user, and is attached so that the top sheet 2 touches the crotch portion, and the side sheet 12 prevents side leakage of urine and the like.
Furthermore, both the top sheet 2 and the back sheet 4 are liquid permeable, and the absorbent article 20 constitutes a so-called double-sided absorbent pad.
Each of the sheets is fixed with a hot melt adhesive or the like. Moreover, the side seat | sheet 12 is not an essential structure of this invention.

Moreover, the absorbent article 20 is mounted in the outer outer 100 as a so-called inner, and the outer 100 itself also has an absorbing ability. And it is used so that the absorbent article 20 which is an inner may be replaced | exchanged frequently, and the outer 100 may be replaced | exchanged in the stage which made the outer 100 absorb urine etc. several times.
Since the absorbent article 20 is a double-sided absorbent pad, urine that has not been absorbed by the absorbent article 20 can be transferred to the outer 100 through the backsheet 4.

In the example of FIG. 1, the outer 100 is a so-called tape-fixed paper diaper. When unfolded, the outer center 100 has a substantially rectangular shape with a narrow center in the longitudinal direction, and surface fasteners 107 extending in the width direction are arranged at both ends in the longitudinal direction. In addition, the outer fastener 100 can be attached around the waist by connecting the hook-and-loop fastener 107. In addition, solid gathers 112 extending in the longitudinal direction are erected at both ends in the width direction of the outer 100 to prevent side leakage.
And the absorbent article 20 becomes a substantially oval shape or a substantially rectangular shape in order to arrange | position in the outer 100 as an inner, and is enlarged in order to improve an absorption capability. At this time, in order to improve the wearability and wearing feeling by arranging along the front and back of the wearer's crotch, compared to the width W0 (see FIG. 2) corresponding to the crotch part at the center in the longitudinal direction of the absorbent article 20. Further, the width W1 (see FIG. 2) of the portion toward both outer sides in the longitudinal direction is extended to have an irregular shape (wide shape) provided with wide portions 7A1 and 7A2.

The present invention is characterized in that, although the absorbent article 20 is a double-sided absorbent pad type, the wide portion described above has a leak-proof property to prevent liquid leaching.
When the wide portion does not have leak-proof properties, the inner wide portion protrudes from the three-dimensional gather 112 that prevents the outer leak of the outer 100, and the urine absorbed by the absorbent article 20 is transmitted to the wide portion and oozes out from the outer 100. Side leakage is likely to occur.
In particular, in the case of the outer 100 which is a tape-type disposable diaper shown in FIG. 1, since the lateral leakage is prevented by the three-dimensional gather 112, the wide part of the inner is easily protruded and the wide part is not leakproof. Lateral leakage from the outer becomes noticeable. However, the absorbent article 20 of the present invention can be applied not only to the tape-type outer 100 but also to an outer that is a pants-type paper diaper and other underwear.

FIG. 2 shows a top view of the absorbent article 20. The absorbent article 20 has a substantially rectangular shape, and has an irregular shape (wide shape) in which the widths W1 of the portions toward both outer sides in the longitudinal direction are extended to provide the wide portions 7A1 and 7A2 as compared with the width W0 of the longitudinal center portion. It has become.
Further, the top sheet 2 is exposed on the surface of the absorbent article 20, and the leak-proof sheet 70 surrounds both ends of the top sheet 2 in the width direction. And a part of leak-proof sheet | seat 70 protrudes in the width direction outer side, and forms wide part 7A1, 7A2, respectively.
In addition, although the upper surface of the leak-proof sheet | seat 70 has covered the extension part 12e (refer FIG. 3) extended in the plane direction from the side sheet | seat 12, the side sheet | seat 12 is abbreviate | omitted in FIG.

3 is a cross-sectional view taken along line III-III (wide portion 7A1) of FIG. An absorbent body 6 is interposed between the top sheet 2 and the back sheet 4 which are the surface layers of the absorbent article 20, and fluid such as urine is guided between the top sheet 2 and the absorbent body 6 to the absorbent body and is elastic. A transfer sheet 8 for imparting the property is disposed. Such a configuration is common in absorbent articles, and is similar to those described in, for example, Japanese Patent Application Laid-Open No. 2006-175022 and Japanese Patent Application Laid-Open No. 2006-181080.
The top sheet 2 and the back sheet 4 are narrower than the absorbent body 6, and a leak-proof sheet 70 extending outward in the width direction is disposed so as to overlap with both ends of the top sheet 2 and the back sheet 4 in the width direction. Yes. Specifically, the leak-proof sheet 70 overlaps under the width direction both ends of the top sheet 2, and the leak-proof sheet 70 overlaps under the width direction both ends of the back sheet 4.

And each leak-proof sheet | seat 70 of an up-down direction mutually overlaps, and comprises wide part 7A1. Further, although not shown, the end portions in the width direction of the respective leak-proof sheets 70 (wide portions 7A1) in the vertical direction are joined (sealed) by hot melt or the like.
Furthermore, the extension part 12e of the side sheet 12 covers the upper surface of the leak-proof sheet 70 (wide part 7A1) and the overlapping part of the leak-proof sheet 70 and the top sheet 2, and the side sheet 12 extends upward from the vicinity of the overlapping part. Is up. Further, the elastic member 16 is disposed along the longitudinal direction of the absorbent article 20 at the most rising end portion of each side sheet 12. Accordingly, the side sheet 12 is stretched by the elastic force of the elastic member 16 to form a three-dimensional rising portion of the side sheet 12 and effectively prevent side leakage.

  FIG. 4 is a cross-sectional view taken along the line IV-IV (longitudinal central portion) of FIG. Also in FIG. 4, as in FIG. 3, the top sheet 2 and the back sheet 4 are narrower than the absorbent body 6 and overlap the width direction end portions of the top sheet 2 and the back sheet 4, respectively. A leak-proof sheet 70 extending outward is disposed. And each leak-proof sheet | seat 70 of an up-down direction mutually overlaps, and the edge part of the width direction is joined (seal | sealed).

The top sheet 2 and the back sheet 4 may be liquid-permeable non-woven fabrics, and the top sheet 2 is made of a material that is soft to the touch and does not irritate the skin in order to be in contact with the user's skin. Is preferred. The basis weight of the top sheet 2 is preferably 15 to 40 g / m ² (more preferably 20 to 35 g / m ² ). The basis weight of the backsheet 4 is preferably 15 to 40 g / m ² (more preferably 20 to 35 g / m ² ).
The transfer sheet 8 only needs to be formed of a nonwoven fabric, and it is sufficient that the user's excrement and secretion (urine, etc.) are transferred to the absorbent body 6 and dispersed to develop elasticity. In particular, it is preferable to use a hydrophilic nonwoven fabric having a basis weight of 20 to 50 g / m ² (preferably 30 to 40 g / m ² ) as the transfer sheet 8. As the top sheet 2, the back sheet 4 and the transfer sheet 8, it is preferable to use a bulky air-through nonwoven fabric.
On the outer surface of the back sheet 4, a stopper (adhesive) or the like that prevents a shift when the absorbent article 20 is fixed to the underwear or the like may be provided to the extent that the urine transition to the outer is not hindered.

The absorbent body 6 may be formed by mixing a hydrophilic fiber matrix of a fluff web, such as a wood pulp fluff, with particles of a known superabsorbent resin (SAP). Further, it is preferable to emboss the surface of the absorbent body 6 because it controls diffusion of urine and the like, and the absorbent body 6 is easily deformed according to the body shape of the user.
As the fluff, synthetic fiber, polymer fiber, or the like may be used instead of the wood pulp fluff. Further, as the wood pulp fluff, it is preferable to use a treatment pulp that is low in bulk and can suppress the required power of the defibrating apparatus (power consumption of the defibrating machine when pulp is fluffed).
In order to make the absorber 6 thin, it is common to increase the blending ratio of SAP. However, the role of fluff is large in the initial stage of urine absorption, and if there is too much SAP and the fluff is small, the initial absorbability is increased. Inferior. For this reason, it is preferable that the content rate of SAP in the absorber 6 shall be less than 50 mass%.
The SAP is preferably a pearl type because the pearl type (obtained by the reverse phase suspension polymerization method) has less damage under pressure than the crushed type.

The leak-proof sheet 70 only needs to be formed from a liquid-impermeable material having a leak-proof (waterproof) property so that the liquid held in the absorbent body 6 does not leach out, such as a polyethylene film, a polyester film, It can be a thin plastic film made of polyvinyl alcohol film, polypropylene film, polyethylene / polypropylene composite film, etc., but it is easy to make a rustling sound while wearing, and is embossed to give softness, plastic A cross-like back sheet in which a nonwoven fabric is bonded to the outside of the film can also be used. In particular, it is preferable to use a polyethylene film as the leak-proof sheet 70. Moreover, it is preferable to reduce stuffiness by using a gas-permeable (moisture-permeable) film as the leak-proof sheet 70.
The basis weight per leakproof sheet is preferably 18 to 40 g / m ² (more preferably 20 to 30 g / m ² ).

The side sheet 12 can be formed from the same material as the leak-proof sheet 70, and may be formed from a water-repellent nonwoven fabric.
The elastic member 16 may be a strand, ribbon, polyurethane, synthetic rubber, natural rubber, or the like made of an elastomeric polymer material, but is not limited thereto.

Thus, although the absorbent article 20 is a double-sided absorbent pad type, the wide portions 70A1 and 70A2 have a leak-proof property that prevents liquid from leaching. For this reason, it is possible to prevent urine or the like absorbed by the absorbent article 20 from being transmitted to the wide portions 70A1 and 70A2 and soaking out from the outer 100 and causing side leakage. Moreover, since the wide portions 70A1 and 70A2 are provided, even when the absorbent article 20 is enlarged to increase the amount of absorption, the wearability and the feeling of wear when placed along the front and back of the wearer's crotch are improved. Can be improved.
Furthermore, in the first embodiment, since the upper and lower surfaces (the front surface side and the back surface side) of the wide portions 70A1 and 70A2 are both configured from the leak-proof sheet 70, urine or the like is transmitted to the wide portions 70A1 and 70A2. Can be further prevented.

Next, with reference to FIGS. 5-7, the absorbent article which concerns on the 2nd Embodiment of this invention is demonstrated. In addition, in the absorbent article 20B which concerns on 2nd Embodiment, the same code | symbol is attached | subjected to the same component as the absorbent article 20 which concerns on 1st Embodiment, and description is abbreviate | omitted.
FIG. 5 shows a top view of an absorbent article 20B according to the second embodiment. Absorbent article 20B has a substantially rectangular shape, and has an irregular shape in which wide portion 7B is provided by extending width W1 of the portion toward one side (downward in FIG. 5) in the longitudinal direction as compared with width W0 of the central portion in the longitudinal direction. Wide shape).
Similarly to the absorbent article 20 according to the first embodiment, the top sheet 2 is exposed on the surface of the absorbent article 20 </ b> B, and the leakproof sheets 70 </ b> B surround both ends in the width direction of the top sheet 2. And a part of leak-proof sheet 70B protrudes to the width direction outer side, and forms the wide part 7B.
Note that the upper surface of the leak-proof sheet 70B covers the extending portion 12e (see FIG. 6) extending in the planar direction from the side sheet 12, but the side sheet 12 is omitted in FIG.

6 is a cross-sectional view taken along line VI-VI (wide portion 7B) in FIG. An absorbent body 6 is interposed between the top sheet 2 and the back sheet 4 that are the surface layer of the absorbent article 20B.
The top sheet 2 is narrower than the absorbent body 6, and the back sheet 4 extends outward in the width direction as an extension sheet. In addition, a leak-proof sheet 70 </ b> B extending outward in the width direction so as to overlap the both ends in the width direction of the top sheet 2 is disposed. The end portions in the width direction of the leak-proof sheet 70B and the back sheet coincide with each other, and the leak-proof sheet 70B and the back sheet 4 overlap in the vertical direction to form the wide portion 7A. Although not shown, the leakproof sheet 70B (wide portion 7B) and the end portion in the width direction of the back sheet 4 are joined (sealed) by hot melt or the like.
Furthermore, the extension part 12e of the side sheet 12 covers the upper surface of the leak-proof sheet 70B (wide part 7B) and the overlapping part of the leak-proof sheet 70B and the top sheet 2, and the side sheet 12 extends upward from the vicinity of the overlapping part. Is up.

  FIG. 7 is a cross-sectional view taken along line VII-VII (longitudinal central portion) of FIG. Also in FIG. 7, as in FIG. 6, the top sheet 2 is narrower than the absorbent body 6, and the end portions in the width direction of the leak-proof sheet 70 </ b> B coincide with the back-sheet 4. Are overlapped in the vertical direction, and the end portions in the width direction are joined (sealed).

Also in the second embodiment, the wide portion 70BB has a leak-proofing property that prevents the liquid from leaching, although the absorbent article 20B is a double-sided absorbent pad type. For this reason, it is possible to prevent urine or the like absorbed by the absorbent article 20B from being transmitted to the wide portion 70BB and soaking out from the outer 100 to cause side leakage. Moreover, since the wide part 70BB is provided, even if the absorbent article 20 is enlarged in order to increase the amount of absorption, it improves the wearability and the feeling of wear when placed along the front and back of the wearer's crotch. be able to.
Furthermore, in the second embodiment, since the back sheet 4 also serves as the lower surface (back surface side) of the wide portion 70BB, the number of parts can be reduced and the productivity and product cost can be reduced.
In the second embodiment, the upper and lower surfaces may be reversed, that is, the back sheet 4 may be narrower than the absorbent body 6 and the top sheet 2 may be extended to the outside in the width direction as an extension sheet. In this case, the leak-proof sheet 70 </ b> B is arranged on the outer side in the width direction so as to overlap the both ends of the back sheet 4 in the width direction.

Next, with reference to FIG. 8, FIG. 9, the absorbent article which concerns on the 3rd Embodiment of this invention is demonstrated. Note that in the absorbent article 20C according to the third embodiment, the same components as those of the absorbent article 20 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Moreover, 20 C of absorbent articles which concern on 3rd Embodiment have the same planar structure (namely, two wide part) as the absorbent article 20 except a laminated structure differing.
8 is a cross-sectional view of the wide portion 7C corresponding to the line III-III in FIG. 2, and FIG. 9 is a cross-sectional view corresponding to the line IV-IV in FIG.

In FIG. 8, an absorbent body 6 is interposed between the top sheet 2 and the back sheet 4 that are the surface layer of the absorbent article 20 </ b> C.
Both the top sheet 2 and the back sheet 4 extend to the outside in the width direction as compared with the absorbent body 6 as extension sheets to form a wide portion 7C. In addition, a leak-proof sheet 70C that extends to the outside in the width direction so as to overlap the top sheet 2 and the back sheet 4 in a region that overlaps the end of the absorber 6 in the width direction and further to the outside of the absorber 6. Has been placed.

Specifically, a transfer sheet 8 having a width narrower than that of the absorbent body 6 is disposed on the upper side of the absorbent body 6, and the leakage preventing sheet 70 </ b> C extends outward in the width direction so as to overlap the both ends in the width direction of the transfer sheet 8. Is arranged. And the top sheet 2 is arrange | positioned above the leak-proof sheet 70C so that each leak-proof sheet 70C may be covered.
Further, the leakage preventing body extends outward in the width direction so as to overlap the lower side of the absorbent body 6 below the widthwise opposite ends of the absorbent body 6 and to expose the lower surface excluding the opposite ends of the absorbent body 6. A sheet 70C is disposed. And the back sheet | seat 4 is arrange | positioned under the leak-proof sheet 70C so that each leak-proof sheet 70C may be covered.
In this way, the upper and lower leak-proof sheets 70C, and the top sheet 2 and the back sheet 4 arranged above and below the upper and lower directions overlap each other to form the wide portion 7C. Further, although not shown, the leakage preventing sheet 70C (wide portion 7C) and the end portions in the width direction of the top sheet 2 and the back sheet 4 are joined (sealed) by hot melt or the like.

  FIG. 9 is a cross-sectional view taken along the longitudinal center (excluding the wide portion 7C) of the absorbent article 20C. Also in FIG. 9, as in FIG. 8, the top sheet 2 and the back sheet 4 both extend outward in the width direction from the absorbent body 6 as extension sheets. Further, a leak-proof sheet 70 </ b> C extending outward in the width direction so as to overlap the top sheet 2 and the back sheet 4 on the inner side in the width direction than the absorbent body 6 is disposed, and ends in the width direction are joined (seal). Has been.

  In the third embodiment, when a sheet (for example, a polyethylene sheet) that is excellent in leak-proof but inferior in touch is used as the leak-proof sheet 70C, the leak-proof sheet 70C is covered with a top sheet or back sheet that is soft to the touch. Tactile feeling can be improved.

It goes without saying that the present invention is not limited to the above-described embodiments, and extends to various modifications and equivalents included in the spirit and scope of the present invention.
For example, the shape of the absorbent article is not limited to the above, and the shape and the number of the wide portions are not limited to the above.
Further, the laminated structure of the absorbent article is not limited to the above.
Moreover, it is preferable that the width | variety of a wide part is 250-400 mm.

<Manufacture of absorbent articles>
As Example 1, an absorbent article 20B according to the second embodiment shown in FIGS. The absorbent body 6 was formed by mixing wood pulp fluff and known superabsorbent resin (SAP) particles in the ratio shown in Table 1.
As Comparative Examples 1 and 2, while absorbing the same shape as the absorbent article 20B, the absorbent article 20B was absorbed in the same manner as the absorbent article 20B except that a water-repellent sheet and a hydrophilic sheet were disposed in place of the leak-proof sheet 70B. A product was manufactured. The “SMMS nonwoven fabric” of Comparative Example 1 in the table represents a composite nonwoven fabric having a four-layer structure of spunbond nonwoven fabric / meltblown nonwoven fabric / meltblown nonwoven fabric / spunbond nonwoven fabric.

The basis weight of each component of Table 1 was measured based on JIS P8124.
<Absorption performance>
The absorbent article, whose weight was measured in advance, was completely immersed in physiological saline for 5 minutes. After dipping, the weight of the absorbent article was measured by placing the top sheet on the wire net with the top sheet down and draining for 30 seconds to determine the weight after absorption. The difference in weight before and after absorption was taken as the total absorption.
<Leaching amount from the surface of the wide part>
The obtained absorbent article was placed on a larger waterproof sheet. Next, as shown in FIG. 5, at the upper end in the longitudinal direction of the wide portion 7B of the absorbent article and at the position P1 in the center in the width direction, 0.9 wt. Of the specified amount (water injection amount in Table 1) on the surface of the top sheet 2 % Saline was injected. After 5 minutes, a filter paper was placed on the center position P2 of both wide portions 7B, and a weight was placed on the filter paper for 30 seconds, and the amount of water (g) absorbed by the filter paper was measured. . Each weight shown in Table 1 was applied to the position P2 by changing the mass of the weight. The measurement was performed for each of the left and right wide portions 7B, and an average value of both was adopted.
Note that the load of 35 g / cm2 is assumed to be applied when an average adult is sleeping. A load of 70 g / cm2 is assumed to be applied while an average adult is sitting. The load of 105 g / cm2 assumes a state where the force is concentrated locally, such as when the average adult sleeps sideways and hits the hipbone.
The obtained results are shown in Table 1.

As can be seen from Table 1, in the case of Example 1 where the wide portion has leak-proof properties, even when a load is applied to the wide portion, there was no oozing from the surface, and the absorption performance was excellent.
On the other hand, in the case of Comparative Examples 1 and 2 in which the wide portion did not have leak-proof properties, the liquid oozed out from the surface when a load was applied to the wide portion. For this reason, it is not sufficient for the wide portion to have water repellency, and it is necessary to have leakage resistance. “Water repellency” means that the liquid repels but the liquid oozes when a load is applied. “Having a leak-proof (waterproof) property” means that, as shown in Table 1, the liquid does not bleed out even when a load in the range of 35 to 105 gf / cm ² is applied. “Liquid does not ooze out” means that, as evaluated in the above-mentioned “amount of oozing from the surface of the wide portion”, physiological saline is injected into the surface of the target sheet, and a filter paper is further formed thereon. When the above load is applied from above the filter paper, the amount of water absorbed by the filter paper is 0 g.

2 Top sheet 4 Back sheet 6 Absorber 20, 20B, 20C Absorbent article 70A1, 70A2, 70B, 70C Wide part

Claims (7)

An absorbent article comprising a liquid-permeable top sheet, a liquid-permeable back sheet, and an absorbent body disposed between the top sheet and the back sheet,
Having a wide portion extending outward in the width direction from the periphery,
The said wide part is an absorbent article which has the leakproof property which prevents leaching of a liquid. The top sheet and the back sheet are narrower than the absorber,
And the leak-proof sheet | seat extended in the said width direction outer side so that it may each overlap with the width direction edge part of the said top sheet and the said back sheet | seat is arrange | positioned,
The absorbent article according to claim 1, wherein each of the leak-proof sheets extends outward in the width direction and overlaps each other to form the wide portion. While either the top sheet or the back sheet extends outward in the width direction as an extension sheet to constitute the wide portion,
Of the top sheet or the back sheet, a sheet that does not become the extension sheet is narrower than the absorber, and has a leak-proof sheet that extends outward in the width direction so as to overlap with an end in the width direction of the sheet. Arranged,
The absorptive article according to claim 1 in which said leak-proof sheet overlaps with said extension sheet, and constitutes said wide part. Both the top sheet and the back sheet extend outward in the width direction as extension sheets to constitute the wide portion, and
A leak-proof sheet that extends outward in the width direction so as to overlap with the top sheet and the back sheet is arranged inside the width direction from the absorber,
The absorbent article according to claim 1, wherein each of the leakage preventing sheets overlaps each of the extension sheets to constitute the wide portion.   The absorptive article according to any one of claims 1 to 4 in which said wide part is provided in one place or two places in the longitudinal direction.   The width | variety of the said wide part is 250-400 mm, The absorbent article as described in any one of Claims 1-5.   The absorbent article as described in any one of Claims 1-6 in which the three-dimensional gather which stands upright while extending in the said longitudinal direction is provided.