JP4264867B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[Technical Field] The present invention relates to an absorbent article that is intended to reduce skin troubles in the buttock in consideration of preventing stool from adhering to the wearer's buttock and also has good urine absorption.
[0002]
The “absorbent article” in the present invention includes infants or nursing diapers, adult incontinence products, and the like.
[0003]
[Prior art]
As a means for preventing leakage of excrement such as urine and feces in so-called disposable diapers, a method of forming a three-dimensional gather that rises toward the wearer's skin with a sheet on which an elastic member is arranged is known. By extending from the crotch part to the front body and the back body, the device which prevents the leakage of excrement is devised.
[0004]
A disposable diaper having a structure designed so that the stool does not come into contact with the skin of the wearer's buttocks as much as possible has also been devised. Among the processes when changing disposable diapers, particularly when the disposable diaper contains feces, it is necessary to clean the wearer's buttocks and the like, and the work load for that purpose tends to increase. By reducing the burden of handling this stool by preventing the wearer from touching the stool as much as possible, the stool touches the wearer's buttocks as much as possible, especially in combination with reducing the leakage of the stool. It is requested not to.
[0005]
In order to satisfy such a requirement, an absorbent article incorporating means for preventing stool leakage up to the back of the body has been proposed in Japanese Patent No. 2572744 and Japanese Patent Publication No. 8-511444. The absorbent article disclosed in Japanese Patent No. 2572744 is provided with a sheet in which an opening is formed in the crotch region at the center of the diaper, and an elastic member is disposed in the longitudinal direction of the diaper adjacent to the opening. Is. In addition, the absorbent article disclosed in JP-A-8-511444 is provided with barrier cuffs adjacent to both edges in the longitudinal direction of the absorbent article, and a part of the top sheet is placed between the barrier cuffs. The pocket cuff which extends in the is arranged.
[0006]
[Problems to be solved by the invention]
Although the absorbent articles disclosed in Japanese Patent No. 2572744 and Japanese Patent Publication No. 8-511444 are all effective in terms of making the stool difficult to contact the wearer's buttocks, In the case of the absorbent article disclosed in Japanese Patent No. 2572744, since the liquid-impermeable sheet covers the absorber, when the urine reaches the liquid-impermeable sheet along the wearer's skin, Urine may leak from here, which is not preferable.
[0007]
Similarly, in the absorbent article disclosed in JP-A-8-511444, the liquid-impermeable pocket cuff covers the top sheet placed on the absorbent, so that the skin of the wearer If the urine reaches the pocket cuff, the urine may leak from this, and there is room for improvement.
[0008]
OBJECT OF THE INVENTION
An object of the present invention is to provide an absorbent article that can save labor during replacement by suppressing leakage of stool and adhesion of stool to the wearer's buttocks, and further improving absorbability to urine. It is in.
[0009]
[Means for Solving the Problems]
The first aspect of the present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber disposed between the top sheet and the back sheet, and the top sheet through the top sheet. A liquid-impermeable material that is disposed on the top sheet so as not to overlap with a part of the back body region of the absorbent body and forms a gap with the top sheet, and has an opening at least in the crotch region . a skin contact sheet, in the absorbent article, characterized in that it comprises a said skin contact sheet and overlapping such not liquid passing portion formed in the region of the top sheet with overlapping with the absorber.
The second aspect of the present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body disposed between the top sheet and the back sheet, and the top sheet. A liquid-impermeable skin contact sheet that is disposed on the top sheet so as to overlap the absorbent body and forms an air gap between the top sheet and having an opening at least in the crotch region, and the skin The absorbent article includes a liquid passage portion extending from the hydrophilic treatment portion formed in the back body region of the contact sheet to the absorber through the top sheet.
[0010]
In the present invention, the stool is held in the gap between the top sheet and the skin contact sheet from the opening, and the stool is partitioned from the wearer's skin by the skin contact sheet. Urine transmitted to the wearer's skin even reach the skin contact sheet, the presence of the liquid passing part, the urine is absorbed into the absorbent body through the liquid passing part.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the absorbent article according to a first embodiment of the present invention, there may therefore also include a notch which liquid passing part is formed in the body region after the skin contact sheet.
[0013]
The voids can be formed from at least the widthwise side edges of the skin contact sheet to the back body region.
[0014]
At least a part of the skin contact sheet may be an elastic member that can expand and contract.
[0015]
The skin contact sheet may have a stretchable elastic member disposed along the opening.
[0016]
As the top sheet in the present invention, it is possible to use a non-woven fabric, a woven fabric, a porous plastic film, etc., which have been subjected to a hydrophilic treatment, such as polypropylene fiber, polyethylene fiber, polyester fiber, nylon fiber, or polypropylene, polyethylene, polyester, It can be composed of a composite fiber containing two or more nylons. In particular, a polyester / polyethylene composite fiber or a polypropylene / polyethylene composite fiber is preferable from the viewpoint of strength, but is not particularly limited thereto. Although this top sheet can be formed of a single sheet, it is composed of a plurality of sheets, for example, a center top sheet that covers the absorber and side top sheets that are joined to both side edges in the width direction. It is also possible. In this case, both the center top sheet and the side top sheet can be made of the same material, but it is also effective to form them with different materials. For example, the side top sheet can be made water-repellent with respect to the hydrophilic center top sheet, or a thermoplastic resin film can be laminated on the side top sheet to make it liquid-impermeable.
[0017]
A liquid-impermeable polyethylene film or the like can be employed as the back sheet in the present invention. More preferably, a polyethylene film having a large number of micropores that do not allow liquid molecules to permeate while allowing gas molecules to pass through to prevent stuffiness, and a moisture-permeable film stretched by adding a filler to a thermoplastic resin Or, by using a composite sheet with non-woven fabric bonded to the outside of these films, excess moisture can be released to the outside, making it less likely to cause peeling and rash, and in terms of moisture permeability and touch It can be comfortable.
[0018]
The absorbent body in the present invention is mainly composed of cotton-like pulp and a highly water-absorbing substance, but is not particularly limited thereto. For example, a water-absorbing sponge or a water-absorbing sheet may be used, and any water-absorbing sheet can be used as long as it has water-absorbing properties. Moreover, although the shape of an absorber can employ | adopt an hourglass or a rectangular outline, an hourglass-like outline can obtain better fitting property.
[0019]
The above-described cotton-like pulp is obtained by forming a chemical pulp, a mechanical pulp, or a chemical mechanical pulp sheet into a cotton-like shape using a pulverizer. Pulp raw materials are not limited to conifers, but hardwoods, straw, bamboo, kenaf, and the like can also be used. The amount of flocculent pulp used varies depending on the structure of the intended absorbent body, that is, whether it is used alone, in a stacked manner, or in combination with other absorbent bodies. Set to ~ 400 grams. Moreover, you may mix a synthetic fiber, a heat-fusion component, an adhesive agent, etc. in this cotton-like pulp.
[0020]
The above-mentioned superabsorbent material absorbs water more than 20 times its own weight, and starch, cellulose, synthetic polymer, etc. can be used. Most preferred from the viewpoint. The shape may be any shape such as a fiber shape, a granular shape, or a sheet shape.
[0021]
Skin contact sheet of the present invention, have a liquid-impermeable, it is possible to construct a nonwoven fabric, woven fabric, such as a plastic film. Specific examples of the material include polypropylene, polyethylene, polyester, nylon, or a composite material including two or more of these. In addition to this, it is also possible to use a stretchable member, or a material obtained by combining this stretchable member with a nonwoven fabric, a film, etc., and is not particularly limited thereto.
[0022]
As the elastic member in the present invention, it is possible to use a stretchable material used in conventional disposable diapers such as urethane film, urethane yarn, urethane foam, yarn rubber, natural rubber, etc., and these elastic members are manufactured. It is sometimes placed in a stretched state and bonded and fixed by hot melt, starch-based or water-soluble glue such as carboxymethyl cellulose (CMC) or a highly fluid adhesive, heating, ultrasonic waves, or the like.
[0023]
【Example】
Examples in which the absorbent article according to the present invention is applied to an unfolded diaper will be described in detail with reference to FIGS. 1 to 10, but the present invention is not limited to these examples, and these may be further combined, All changes and modifications that fall within the inventive concept described in the claims are possible, and can of course be applied to other techniques belonging to the spirit of the invention.
[0024]
FIG. 1 shows a developed shape of the present embodiment, and FIGS. 2 and 3 show its II-II cross-sectional structure and III-III cross-sectional structure, respectively. That is, the unfoldable diaper 11 in this embodiment includes a liquid-impermeable back sheet 12, a liquid-permeable center top sheet 13C that is superimposed on the back sheet 12, and both sides in the width direction of the center top sheet 13C. A pair of side top sheets 13S (hereinafter collectively abbreviated as a top sheet 13) respectively joined to the end edges, an absorber 14 disposed between the top sheet 13 and the back sheet 12, It is arranged over the back body region from the longitudinal end edge 15 serving as an opening around the waist of the front body region so as to overlap the absorber 14 via the top sheet 13, Both the longitudinal ends thereof have a skin contact sheet 16 joined to the top sheet 13. The back sheet 12 and the top sheet 13 have a pair of front and rear side flap portions 17 and 18 extending outward from both side edges in the width direction of the absorbent body 14, and between the side flap portions 17 and 18, A pair of pull-out portions 19 serving as leg opening portions are formed.
[0025]
A pair of left and right legs that can be overlapped with the side flaps 17 on the front body side and connected to both side edges of the side flaps 18 on the rear body side when worn are formed, and a leg opening is formed by the pull-out part 19. A fastening tape 20 is attached, and the fastening tape 20 is joined to a base tape (not shown) joined on the back sheet 12 on the front body side so as to be repeatedly peelable.
[0026]
In addition, from the crotch region along the outer longitudinal direction of both side edges of the absorbent body 14 to the front body side and the back body side, between the back sheet 12 and the top sheet 13, the fit around the legs when worn is provided. An elastic member 21 around the legs for forming a leg gather to be improved is fixed in an extended state.
[0027]
At the center in the width direction of the skin contact sheet 16, a notch 22 is formed as an opening of the present invention from the longitudinal edge 15, which is an opening around the waist of the front body region, to the crotch region. The elastic member 23 is disposed in an extended state along the notch 22. The skin contact sheet 16 in the present embodiment is formed by stacking two sheet materials, and the elastic member 23 described above is sandwiched between these two sheet materials. Therefore, the space 24 is formed between the top sheet 13 and the skin contact sheet 16 by the contraction force of the elastic member 23, and stool can be guided here. Instead of disposing the elastic member 23 on the skin contact sheet 16, it is also effective to configure the skin contact sheet 16 itself with a stretchable material.
[0028]
The longitudinal direction end of the skin contact sheet 16 in the present embodiment on the side of the back body region is located closer to the crotch region than the longitudinal end of the back of the absorber 14 on the side of the back body region. A region that does not overlap with the skin contact sheet 16 is formed on the rear body region side, and a portion of the top sheet 13 (shown by hatching in FIG. 1) that covers this region constitutes the liquid passage portion T according to the present invention.
[0029]
Therefore, in a state where such a deployable diaper 11 is worn, the skin contact sheet 16 comes into close contact with the wearer's skin due to the contraction force of the elastic member 23, and urine is absorbed through the top sheet 13 from the notch 22. It is rapidly absorbed by the body 14. The stool is guided from the notch portion 22 onto the top sheet 13 and held in a gap 24 formed between the top sheet 13 and the skin contact sheet 16. In the case of loose stool, the moisture passes through the top sheet 13 and is absorbed by the absorber 14. In the present embodiment, since the rear body side edge of the skin contact sheet 16 is joined to the top sheet 13, it is possible to reliably prevent stool leakage from other than the notch 22. In addition, when water or the like adhering to the wearer's skin enters the space between the skin contact sheet 16 and the wearer's skin when the urine or the wearer's buttocks are washed, the liquid passes through the skin contact sheet 16 and passes through the liquid. It is absorbed by the absorber 14 from the part T. In particular, in adults, the buttock of the wearer may be washed with water using a washing bottle after defecation, and the water after washing often adheres to the wearer's skin. By forming such a liquid passage part T in an absorbent article, the malfunction which this leaks outside at the time of wear | deployment of the expansion | deployment type diaper 11 can be suppressed.
[0030]
Further, when the unfoldable diaper 11 is for an adult, an auxiliary liquid absorbing pad can be used by inserting it between the top sheet 13 and the skin contact sheet 16, and in this case, the skin contact sheet Since the outer peripheral edge part of 16 is joined to the top sheet 13, it is possible to prevent position shift of the liquid absorption pad.
[0031]
In the embodiment described above, the length of the skin contact sheet 16 is shortened and the rear end edge in the longitudinal direction is joined to the central portion of the rear body region of the top sheet 13. It is also possible to arrange the skin contact sheet 16 over the entire surface.
[0032]
FIG. 4 shows a planar development shape of another embodiment of the absorbent article according to the present invention, and FIG. 5 shows a cross-sectional structure taken along the line V-V. The same reference numerals are used, and duplicate descriptions are omitted. That is, the skin contact sheet 16 in the present embodiment is disposed on the top sheet 13 and extends from the front body region to the back body region, and both longitudinal ends thereof are openings around the waist of the top sheet 13. It joins to the longitudinal direction both ends edge 15 which becomes. In the rear body region of the skin contact sheet 16, a second cutout portion 25 cut out from the longitudinal edge 15 serving as an opening around the waist of the back body region toward the crotch region is a central portion in the width direction. The peripheral edge of the second notch 25 is joined to the top sheet 13. In the present embodiment, the second notch portion 25 constitutes the liquid passage portion T of the present invention together with the portion of the top sheet 13 indicated by the oblique lines in FIG.
[0033]
In this embodiment, the skin contact sheet 16 is formed between the top sheet 13 and the skin contact sheet 16 by extending the rear edge of the skin contact sheet 16 to the longitudinal edge 15 that becomes an opening around the waist of the back body region. It is possible to increase the volume of the gap 24 to be made as compared with the previous embodiment, and it is possible to prevent the leakage of feces more reliably.
[0034]
In the embodiment described above, the notch 22 is formed as an opening from the crotch region of the skin contact sheet 16 to the front body region, but the entire outer peripheral edge of the skin contact sheet 16 is joined to the top sheet 13. Therefore, it is possible to form the opening only on the center side of the skin contact sheet 16.
[0035]
FIG. 6 shows a planar development shape of another embodiment of the absorbent article according to the present invention, and FIG. 7 and FIG. 8 show the sectional structure taken along the arrows VII-VII and VIII-VIII, respectively. The elements having the same functions as those of the previous embodiment are designated by the same reference numerals, and redundant descriptions are omitted. That is, the skin contact sheet 16 in this embodiment is all joined to the top sheet 13 at the outer peripheral edge, and an elliptical opening 26 is cut from the crotch region to the front body region at the center. It is missing. The hatched area in FIG. 6 is the liquid passage portion T formed on the top sheet 13, and has the same function as the first embodiment shown in FIG.
[0036]
In this embodiment, the pair of elastic members 23 are arranged in parallel with each other along the longitudinal direction of the skin contact sheet 16 with the opening 26 interposed therebetween. However, the skin contact sheet 16 is made of one sheet material. Therefore, the opening 26 is bent inward, and the elastic member 23 is held in an extended state at the bent portion. These elastic members 23 can be disposed along the opening 26 so as to surround the elastic member 23.
[0037]
In the embodiment shown in FIGS. 4 and 5, the second cutout portion 25 is formed on the back body side of the skin contact sheet 16. However, the cutout portion 25 is not formed and the skin contact sheet 16 is not formed. This can be dealt with by applying a hydrophilic treatment to the rear end of the rear body region.
[0038]
FIG. 9 shows a planar development shape of another embodiment of such an absorbent article according to the present invention, and FIG. 10 shows a cross-sectional structure taken along the line XX. The same reference numerals are used, and duplicate descriptions are omitted. That is, the skin contact sheet 16 in the present example is obtained by joining both longitudinal ends of the skin contact sheet 16 to the longitudinal end edges 15 that are openings around the waist of the top sheet 13, respectively. By applying a hydrophilic treatment to the hydrophilic treatment portion), urine, water, etc. transmitted through the skin contact sheet 16 can be absorbed from the hydrophilic treatment portion into the absorbent body 14 via the top sheet 13. it can. In other words, the hydrophilic treatment portion of the skin contact sheet 16 constitutes the liquid passage portion T of the present invention together with the portion of the top sheet 13 overlapping therewith. Also in this embodiment, since the outer peripheral edge of the back side of the skin contact sheet 16 is joined to the top sheet 13, stool is formed between the top sheet 13 and the outer peripheral side of the back side of the skin contact sheet 16. It is possible to prevent problems such as leakage.
[0039]
In the above-described embodiments, the unfolded diaper 11 has been described. However, the present invention relates to a pants-type diaper, a diaper pad, etc. in which the left and right end portions of the front and rear side flap portions 17 and 18 in the unfolded diaper 11 are integrally joined in advance. It can also be applied to.
[0040]
【The invention's effect】
According to the absorbent article of the present invention, a liquid-impermeable skin contact sheet having a gap between the top sheet and an opening in at least the crotch region is disposed on the top sheet and overlaps the absorbent body. In addition, a liquid passage part is formed in the area of the top sheet that does not overlap with the skin contact sheet, or a liquid passage part that extends from the hydrophilic treatment part formed in the back body area of the skin contact sheet to the absorber through the top sheet. Since the stool can be led from the opening to the gap formed between the skin contact sheet and the top sheet, the stool can be prevented from leaking while the stool is in contact with the wearer's buttocks. It is partitioned by a sheet, making it difficult for the stool to come into contact with the wearer's skin and reducing the burden when replacing absorbent articles . Moreover, even if the urine reaches the skin contact sheet are transmitted to the wearer's skin, since that can lead to the absorber so by the presence of the liquid passing part, it is possible to suppress urine leakage.
[0041]
When the gap is formed from at least the widthwise side edges of the skin contact sheet to the back body region, the gap for holding the stool is widened, and stool leakage can be suppressed.
[0042]
When at least a part of the skin contact sheet is formed of an elastic member that can be expanded and contracted, the skin contact sheet is in close contact with the skin of the wearer, so that the fit of the absorbent member can be improved.
[0043]
When the skin contact sheet has a stretchable elastic member arranged along the opening, the skin contact sheet can be brought into close contact with the wearer together with the opening, and the skin contact sheet and the top are surely secured from the opening. It can lead to the space formed between the sheets.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment in which an absorbent article according to the present invention is applied to an unfolded diaper.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a plan view of another embodiment in which the absorbent article according to the present invention is applied to an unfolded diaper.
5 is a cross-sectional view taken along the line VV in FIG. 4;
FIG. 6 is a plan view of another embodiment in which the absorbent article according to the present invention is applied to an unfolded diaper.
7 is a cross-sectional view taken along arrow VII-VII in FIG. 6;
8 is a cross-sectional view taken along arrow VIII-VIII in FIG. 6;
FIG. 9 is a plan view of still another embodiment in which the absorbent article according to the present invention is applied to an unfolded diaper.
10 is a cross-sectional view taken along the line XX in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Unfoldable diaper 12 Back sheet 13C Center top sheet 13S Side top sheet 14 Absorber 15 Longitudinal edge 16 Skin contact sheet 17, 18 Side flap part 19 Pull-out part 20 Fastening tape 21 Leg elastic member 22 Notch part 23 Elastic member 24 Gap 25 Second notch 26 Opening T Liquid passage

Claims (6)

A liquid-permeable topsheet;
A liquid-impermeable backsheet;
An absorber disposed between the top sheet and the back sheet;
A gap is formed between the top sheet and the top sheet so as not to overlap with a part of the back body region of the absorber via the top sheet, and at least an opening in the crotch region A liquid-impermeable skin contact sheet having
Absorbent article characterized in that comprises the said absorber and the skin contact sheet is formed in a region of said topsheet have such overlapping with the liquid passing portion with overlap.   The absorbent article according to claim 1, wherein the liquid passage part includes a notch part formed in the back body region of the skin contact sheet. A liquid-permeable topsheet;
A liquid-impermeable backsheet;
An absorber disposed between the top sheet and the back sheet;
A liquid-impermeable skin contact that is disposed on the top sheet so as to overlap the absorber via the top sheet, forms a gap with the top sheet, and has an opening at least in the crotch region. Sheet,
A liquid passage part extending from the hydrophilic treatment part formed in the back body region of the skin contact sheet to the absorber via the top sheet;
An absorbent article characterized by comprising: The absorbent article according to any one of claims 1 to 3 , wherein the gap is formed from at least both side edges in the width direction to a back body region of the skin contact sheet. The absorbent article according to any one of claims 1 to 4 , wherein at least a part of the skin contact sheet is an elastic member capable of expanding and contracting. The absorbent article according to any one of claims 1 to 5 , wherein the skin contact sheet includes a stretchable elastic member disposed along the opening.

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