JP5142314B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article in which means for preventing leakage of soft or watery stool is attached to the surface side of a top sheet such as a disposable diaper.

  In recent years, as a diaper for infants or elderly people / handicapped persons, an absorbent body, a top sheet that is arranged so as to cover the upper surface of the absorbent body, and at least partially made of a liquid-permeable material, and a lower surface of the absorbent body Disposable diapers that are arranged so as to cover the back and are provided with a back sheet made of a liquid-impermeable material are widely used. By using the disposable diaper so that the surface of the top sheet is in contact with the skin of the wearer, the urine excreted by the wearer permeates the top sheet and is absorbed and held by the absorber. In addition, the back sheet excellent in leakage prevention prevents the excrement from leaking to the outside of the diaper.

  However, in the disposable diaper having the above-described configuration, although urine passes through the top sheet, most of the stool does not pass through the top sheet and remains on the top sheet. Since the stool remaining on the top sheet adheres to the wearer's crotch and buttocks, it requires cumbersome wiping work, which increases the burden of childcare and care, and also causes skin troubles for the wearer. It was.

  Then, the disposable sanitary absorbent article and the disposable diaper which formed the recessed part which can accommodate a stool in a part of absorber are proposed (for example, refer patent document 1 or 2). Moreover, the disposable diaper with which the stool accommodation bag extended below is attached to the non-contact side of a wearer's skin is proposed (for example, refer patent document 3). These disposable diapers and the like are configured such that the stool excreted by the wearer is accommodated in the recess or the stool accommodation bag.

  In addition, a disposable diaper in which another sheet body (hereinafter referred to as “skin contact sheet”) is disposed on the top of the top sheet has also been proposed (for example, Patent Document 4 or 5). reference). In these disposable diapers, an opening (stool passing opening) through which stool can pass is formed in the skin contact sheet, and the feces excreted by the wearer through the stool passing opening are on the top sheet. Configured to fall into.

Japanese Utility Model Publication No. 6-5614 Japanese Patent No. 3012472 JP 2002-253609 A Utility Model Registration No. 2559050 JP 2002-11044 A

  In the disposable diapers described in these documents, the excreted stool is stored in the space below the recess, the storage bag, or the skin contact sheet, thereby reducing the chance that the stool directly contacts the wearer's skin. The effect can be expected.

  However, the disposable diapers described in these documents are designed with the intention of capturing so-called solid stool, and cannot be said to have a structure suitable for capturing soft or watery stool. It was. Therefore, loose stool or watery stool cannot be captured well, and when the wearer is lying down, leakage of soft stool or watery stool occurs from the end of the diaper (especially around the back or legs). There was a problem of fear. In addition, the structure of the disposable diaper becomes complicated by forming a recess in the absorbent body or attaching a storage bag or a skin contact sheet to the disposable diaper, which makes it difficult to manufacture or increases the manufacturing cost. There were also challenges.

  Thus, at present, the measures that can effectively prevent the leakage of soft stools and watery stools from the diaper end (especially around the back or around the legs) and can be easily manufactured with a simple structure are It has not been disclosed yet, and such a measure is eagerly desired. The present invention has been made to solve such problems of the prior art, and can effectively prevent leakage of soft stool or watery stool from the end of the diaper (especially the back side or around the leg). It is possible to provide an absorbent article that can be easily manufactured with a simple structure.

  As a result of intensive studies to achieve the above-described problems, the present inventors have found that the above-described problems can be solved by the specific configuration shown below, and have completed the present invention.

  That is, according to the present invention, the following absorbent articles are provided.

[1] An absorber, disposed so as to cover the upper surface of the absorber, a top sheet made of at least a part of a liquid-permeable material, and disposed so as to cover the lower surface of the absorber, and impermeable to liquid A back sheet made of a functional material, and further comprising a lower stool receiving sheet and a stool receiving sheet in order from the top sheet side on the top sheet, wherein the stool receiving sheet has a plurality of through-holes in a hydrophobic nonwoven fabric. has been drilled, the defecation and loose stools permeation rate V ₁ of the sheet, a plurality of pre-drilled through-holes the defecation loose stools permeation rate V ₁ of the sheet _', loose stools permeation rate V of the defecation underseat ₂ and the stool permeation rate V ₃ of the top sheet is represented by the following formula (1)
_{V 2> V 1> V 3} > V 1 '(1)
Absorbent articles that satisfy.

[ 2 ] The absorbent article according to the above [1 ], wherein the stool receiving sheet and the stool receiving lower sheet are arranged on at least a region facing the anus on the top sheet.

The absorbent article of the present invention is provided with a stool receiving sheet and a stool receiving lower sheet on the upper surface of the top sheet, thereby effectively preventing leakage of soft stool or watery stool from the end (especially the back side). Can do. Further, by loose stool transmission rate V ₂ of the lower receiving feces sheet is larger than the loose stool permeation rate V ₁ of the receiving stool seat, both good liquid permeability and good touch. The absorbent article of the present invention can be easily manufactured with a simple structure.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described with reference to the drawings. However, the present invention broadly encompasses absorbent articles having the invention specific items, and is not limited to the following embodiments.

[1] Configuration of the absorbent article of the present invention:
As shown in FIGS. 1 and 2, the absorbent article 1 of the present invention is arranged so as to cover the absorbent body 22 and the upper surface of the absorbent body 22, and at least a top sheet made of a liquid-permeable material. 18 and a back sheet 20 which is arranged so as to cover the lower surface of the absorber 22 and is made of a liquid-impermeable material. 50b and a stool receiving sheet 50a are further provided.

  When wearing a disposable diaper that is one embodiment of the absorbent article, the wearer's skin is usually in direct contact with the surface of the top sheet of the diaper, and excreted loose stool or watery stool (hereinafter referred to as “watery stool”). It can be said that most of the surface of the top sheet to be absorbed is in a closed state. Therefore, when the watery stool is excreted, the watery stool rapidly spreads in the front-rear direction of the diaper through the extremely narrow space defined by the wearer's groin and the top sheet of the diaper. Leakage will occur from the end (particularly the back end). Moreover, it may leak from the clearance gap made between a body and a diaper by a wearer's motion.

On the other hand, in the absorbent article of the present invention, a stool receiving sheet and a stool receiving lower sheet are attached to the upper surface of the top sheet. With this configuration, when watery stool is excreted on the surface of the sheet material, the watery stool passes through the stool receiving sheet and quickly moves to the stool receiving lower sheet. The watery stool that has been transferred to the lower seat is spread quickly in the lower seat and is gradually transferred to the top sheet . At this time, since the surface of the top sheet is not blocked by the skin of the wearer, watery feces can be absorbed by the entire surface.

  The absorbent article of the present invention can effectively prevent leakage from an end portion (particularly, the back end portion or around the leg) such as a diaper of a watery stool by the mechanism as described above. This effect can be obtained only by attaching a toilet receiving sheet and a toilet receiving lower sheet to an absorbent article such as a disposable diaper, so that the structure of the disposable diaper or the like is not complicated. Further, the toilet receiving sheet and the toilet receiving lower sheet have a simple structure, and are easy to manufacture and can be manufactured at low cost. Therefore, it is possible to take measures against leakage of watery stool extremely simply and inexpensively. In addition, since urine quickly permeates through the stool receiving sheet and the stool receiving sheet and shifts to the top sheet, not only watery stool and soft stool, but also urine is excreted, causing problems in its absorption. There is nothing.

[1-1] Flight receiving sheet:
The absorbent article of the present invention includes a stool receiving sheet as a constituent member. This stool receiving sheet is a sheet-like member that directly contacts the wearer's skin instead of a top sheet such as a disposable diaper. The stool receiving sheet can be quickly transferred onto a top sheet such as a disposable diaper without retaining watery stool on the surface.

  The configuration of the stool receiving sheet is not particularly limited, but a sheet having liquid permeability capable of transmitting a suspension such as watery stool or soft stool is preferable. Specifically, a water-repellent and hydrophilic sheet can be used. By appropriately adjusting the liquid permeation speed of these sheets, sheets having desired liquid permeability can be obtained. Examples of factors that affect the liquid permeation rate include the hydrophilicity of the material, the size of the holes, the number of holes, the bulk density, and the like, and the liquid permeation rate can be adjusted by appropriately selecting them. Specifically, the sheet having such liquid permeability can be constituted by a punching sheet having a through hole. Such a punching sheet is preferable because it allows liquid to pass through the through-holes and is excellent in liquid permeability capable of permeating a suspension such as watery stool or soft stool.

  For example, the stool receiving sheet 50a shown in FIGS. 1 and 2 is a punching sheet having a through hole 52, and the entire stool receiving sheet 50a is configured as a liquid-permeable sheet. In addition, in FIG. 1, although the planar shape of the through-hole is circular, it is not limited to this. Various known shapes such as an ellipse and a rectangular shape can be used. Moreover, in FIG. 1, although the through-hole 52 is perforated uniformly over the whole surface of the stool receiving sheet 50a, it is not limited to this. The through holes 52 may be arranged only in a part of the toilet seat 50a, or the through holes 52 may be unevenly arranged.

  In this way, the method of perforating through-holes in a sheet to make a liquid-permeable sheet is inherently a nonwoven fabric with a basis weight, etc., compared to a method of securing a liquid passing speed by reducing the basis weight of the nonwoven fabric described later. Regardless of the properties and characteristics of the liquid, a predetermined liquid passing speed can be secured. Further, it is preferable in that the liquid passing speed can be controlled to a desired value by the area and number of the through holes.

  The sheet for punching the through holes is preferably a liquid-impermeable sheet or a water-repellent sheet. By adopting such a configuration, it is possible to effectively prevent a situation in which watery stool that has once passed through the toilet receiving sheet and flowed into the toilet receiving lower sheet penetrates the toilet receiving sheet and returns. Among them, it is preferable to use a water-repellent sheet that can maintain a light touch (dryness) even when worn for a long time, as well as being able to reduce liquid permeability, and has excellent breathability. It is more preferable to use a water-repellent nonwoven sheet having a good touch.

  Examples of the liquid-impermeable sheet include a liquid-impermeable film made of a resin such as polyethylene used as a constituent material for a disposable diaper back sheet.

  As the water-repellent sheet, a nonwoven fabric such as a spunbond nonwoven fabric or a card embossed nonwoven fabric may be used. It is preferable to use a nonwoven fabric such as a melt blown / spun bond nonwoven fabric.

  In addition, as the stool receiving sheet, a sheet having liquid permeability that allows the sheet itself to permeate a suspension such as watery stool or soft stool can be employed. For example, a non-woven fabric sheet having a coarse mesh can pass a liquid by using gaps between fibers constituting the non-woven fabric, and therefore, among conventionally known non-woven fabrics such as an air-through non-woven fabric, a card embossed non-woven fabric, and a spunbond non-woven fabric Such a nonwoven fabric may be appropriately selected and used as a liquid-permeable sheet. Among these, an air-through nonwoven fabric can be suitably used because it is bulky and easily subjected to treatment with many voids.

  As a stool receiving sheet, in addition to a punching sheet or a low-weight nonwoven fabric sheet, a mesh sheet in which the sheet itself is configured in a mesh shape can be used. The mesh sheet is preferable because it can allow liquid to pass through the mesh-like voids and is excellent in liquid permeability capable of permeating a suspension such as watery stool or soft stool.

  The nonwoven fabric sheet having a large basis weight and high bulk may be used by appropriately selecting such a nonwoven fabric from conventionally known nonwoven fabrics such as an air-through nonwoven fabric, a card embossed nonwoven fabric and a spunbond nonwoven fabric. Among these, an air-through nonwoven fabric can be suitably used because it is bulky and easily subjected to treatment with many voids.

  In the absorptive article of the present invention, it is not necessary for the toilet receiving sheet to be composed of a single sheet material. Specifically, a plurality of sheets joined together or laminated may be used as a stool receiving sheet. Moreover, in the absorbent article of this invention, it is not necessary to arrange | position a toilet seat sheet over the whole area | region of the upper surface of a top sheet, What is necessary is just to arrange | position to the area | region facing an anus at least. By comprising in this way, the usage-amount of the material which comprises a toilet seat can be reduced, and it is excellent in economical efficiency. At least the region facing the anus can be appropriately selected by those skilled in the art.

[1-2] Stool lower seat:
As the lower stool receiving sheet, a sheet having liquid permeability capable of permeating a suspension such as watery stool or soft stool is adopted. For example, a non-woven fabric sheet having a coarse mesh can pass a liquid by using gaps between fibers constituting the non-woven fabric. Such a nonwoven fabric may be appropriately selected and used as a liquid-permeable sheet. Among these, an air-through nonwoven fabric can be suitably used because it is bulky and easily subjected to treatment with many voids.

  As the stool lower sheet, a sheet mainly composed of water-repellent or hydrophobic fibers may be used. In particular, an aggregate of filaments, for example, a sheet formed by opening a tow bundled with filaments, particularly those in which the filaments are oriented in the surface direction of the sheet, and further, the filaments are spirally crimped It is desirable that When a hydrophilic tow such as acetate is opened to form a sheet, the permeability of soft stool may not be sufficient. The water-repellent or hydrophobic fiber is excellent in the permeability of the soft stool, particularly the liquid. In particular, when a sheet formed by opening a water-repellent or hydrophobic fiber tow is used as a permeable sheet, the stool liquid content is remarkably excellent. Examples of water-repellent or hydrophobic filaments that can be suitably used include filaments of PET, PP, PE, and the like, as well as core-sheath filaments made of these.

  In the absorbent article of the present invention, the lower stool receiving sheet need not be composed of a single sheet material. Specifically, a plurality of sheets joined together or laminated may be used as a stool receiving sheet. Moreover, in the absorbent article of this invention, it is not necessary to arrange | position the feces receiving lower sheet | seat over the whole area | region of the upper surface of a top sheet, What is necessary is just to arrange | position to the area | region facing an anus at least. By comprising in this way, the usage-amount of the material which comprises a toilet seat lower sheet | seat can be reduced, and it is excellent in economical efficiency. At least the region facing the anus can be appropriately selected by those skilled in the art.

[1-3] Relationship between the seat and the lower seat
Loose stool permeation rate V ₂ of the defecation under the seat is greater than the loose stool permeation rate V ₁ of the said defecation sheet. In this specification, the loose stool permeation rate refers to the time required from the time when 30 ml of colored pseudo-soft stool is placed on the subject at 10 ml / sec until the pseudo-stool on the subject cannot be seen. . The pseudo soft stool used at this time has the following composition.
Simulated soft stool composition Content (% by weight)
Bentonite 5.0%
Mayonnaise (commercially available) 5.0%
The balance is water (adjusted so that the viscosity is 200 cps)

In order to make V ₂ > V ₁ the relationship between the soft stool transmission speed V ₂ of the lower stool receiving sheet and the soft stool transmission speed V ₁ of the stool receiving sheet, it can be realized as follows. First, select the material constituting the feces receiving under the seat from the relatively large material loose stools permeation rate V _2. At this time, loose stools permeation rate V ₂ of the material constituting the feces receiving under the seat is made larger than the loose stool permeation rate V ₃ of the topsheet.

Next, a material having a soft stool permeation rate lower than V ₂ is adopted as the stool receiving sheet. Furthermore, a through-hole is drilled in a range where the stool permeation rate of the stool receiving sheet does not exceed the stool permeation rate of the lower stool receiving sheet. As a result, V ₂ > V ₁ can be realized. At this time, it is preferable to use a material in which the stool permeation speed V ₁ ′ of the stool receiving sheet before drilling the through-hole is smaller than the stool permeation speed V ₃ of the top sheet (ie, V ₃ > V ₁ ′) preferably, feces receiving loose stools permeation rate V ₁ of the sheet after perforation of holes perforating larger as the through holes than the soft feces permeation rate V ₃ of the topsheet.

With the configuration as described above, it is possible to achieve good liquid permeability and good touch. In particular, when V ₂ > V ₁ , the touch is improved.

  A preferred combination of the material of the stool receiving sheet, the lower stool receiving sheet and the top sheet, and the size and opening ratio of the through holes perforated in the stool receiving sheet is as follows.

  As the stool receiving sheet, a material perforated in a nonwoven fabric, a film, paper or the like can be used. Moreover, it may be formed into a sheet so as to form a network structure using a natural material such as synthetic resin or pulp as an aggregate.

  As the lower stool receiving sheet, a nonwoven fabric, continuous fiber (tow shape), or the like can be used. It is preferable to use an air-through nonwoven fabric as the nonwoven fabric used as the lower stool receiving sheet. The air-through non-woven fabric is a non-woven fabric obtained by forming a base fabric of heat-sealable fibers having a length of several tens of millimeters into a sheet by carding and then heating it with hot air. When the fiber diameter of the raw cotton is 3-15 dtex, a bulky stool-receiving lower sheet can be obtained.

  The combination of the stool receiving sheet and the lower stool receiving sheet is most preferably a combination of using a sheet perforated in the nonwoven fabric as the stool receiving sheet and using the nonwoven fabric as the lower stool receiving sheet.

  The shape of the perforations is not limited, but is preferably a circle or an ellipse. When the size of the perforations is circular, the diameter is preferably in the range of 2 to 20 mm. In the case of an ellipse, the minor axis is preferably 2 to 10 mm and the major axis is preferably 5 to 20 mm. If the size is less than this, the passage of the stool is poor, and if the size is larger than this, the stool receiving lower sheet is exposed to touch the wearer's skin, so that the comfort is impaired.

[1-4] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  It is preferable that the absorber is interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

[1-5] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, in a tape-type diaper described later, a top sheet (center sheet) made of a liquid-permeable material is disposed at the center of the diaper, and a top sheet (side sheet) made of a water-repellent material is disposed on the side flap portion of the diaper. A form of arranging is often used.

[1-6] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-7] Absorbent body:
In the two-piece type pants-type diaper, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent body” that is responsible for absorption and holding functions, and an exterior member that is manufactured separately. A disposable diaper is formed by joining. Like the sanitary napkin, this absorbent main body has a top sheet on the upper surface side of the absorbent body and a back sheet on the lower surface side. The absorbent body is interposed between the top sheet and the back sheet. It has a structured. In the disposable diaper of the present invention, for example, like the absorbent main body 14 of the disposable diaper 1 shown in FIG. 2, the absorbent body 22 is sandwiched between the top sheet 18 and the back sheet 20, and the peripheral portion of the absorbent body 22 is sealed. By wearing, an absorbent main body having a structure in which an absorber 22 is interposed between the top sheet 18 and the back sheet 20 is provided.

  An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive.

[1-8] Exterior member:
The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body.

  In the two-piece type pants-type diaper, the absorbent main body serves exclusively for the absorption / holding function of absorbing and holding the excrement of the wearer, so a liquid-impermeable material as a material constituting the exterior member There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  And in order to fix an exterior member in the state which pinched | interposed the elastic material etc. around the leg, it is often configured by bonding two or more nonwoven fabrics together. For example, in the disposable diaper 1 shown in FIGS. 1 and 2, the exterior member 16 is composed of two nonwoven fabrics, and the leg elastic members 40, the waist elastic members 42, and the belly elastic members between the two nonwoven fabrics. This is an example in which 44 is sandwiched and fixed.

[1-9] Solid gathering:
The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming this three-dimensional gather, urine is excreted on the toilet receiving sheet, and even if the urine spreads through the toilet receiving sheet, the three-dimensional gather becomes a breakwater, from the opening around the leg of the diaper, etc. Leakage (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, it is possible to suitably use a material in which a stretchable material (a three-dimensional gathered stretchable material) is arranged on a part of the sheet material, and a gather is formed on the sheet material by the three-dimensional gathered stretchable material.

  As the sheet material constituting the three-dimensional gather, a water-repellent material is used from the viewpoint of improving the leak-proof property of the three-dimensional gather. Non-woven fabrics such as spunbond and card embossing may be used as the water-repellent material, but SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / meltblown / spun) are used because of their high water pressure resistance. It is preferable to use a non-woven fabric such as a bond.

  The three-dimensional gather can be formed by folding back the top sheet or back sheet of the absorbent main body, or the stool receiving sheet or the stool receiving lower sheet. However, it is more preferable that the three-dimensional gather is formed by sticking a sheet material completely different from the top sheet, the back sheet, and the like.

  The three-dimensional gather is preferably formed on both sides of the stool receiving sheet 50a and the stool receiving lower sheet 50b for the purpose of preventing side leakage of urine. Especially, it is preferable to form along the both-sides edge part of the toilet receiving sheet | seat 50a and the toilet receiving lower sheet | seat 50b. By doing this, even when urine is excreted on the skin contact sheet and the urine diffuses through the skin contact sheet, the three-dimensional gather surely functions as a breakwater, and from the openings around the legs. Side leakage can be effectively prevented.

  For example, in the case of the disposable diaper 1 shown in FIG. 1 and FIG. 2, the stool receiving sheet 50a and the stool receiving lower sheet 50b are disposed up to both side edges of the absorbent main body 14, and the three-dimensional gathers 26a and 26b are connected to the stool. This is an example formed along both side edges of the receiving sheet 50 a and the lower stool receiving sheet 50 b, that is, along both side edges of the absorbent main body 14. In addition, although the disposable diaper 1 shown in FIG.2 and FIG.3 is an example in which the three-dimensional gathers 26a and 26b were formed over the both sides edge region of the absorptive main body 14, from the objective of preventing the side leakage of urine, It should just be arrange | positioned at the part corresponded at least to the crotch part of a diaper.

  In the disposable diaper, at least a pair of three-dimensional gathers are preferably formed, but two or more pairs may be formed.

[1-10] Various elastic materials:
In a pants-type disposable diaper, it is common to arrange an elastic material around the legs, arrange an elastic material around the waist, and more preferably arrange an elastic material around the abdomen.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  In the disposable diaper 1 shown in FIG. 1 and FIG. 2, a plurality of leg-surrounding elastic members 40 are arranged on the periphery of the leg-surrounding opening, and the waist-surrounding opening surrounds the waist-surrounding opening. A plurality of waist elastic members 42 are arranged, and a portion between the waist opening and the leg opening (that is, a portion corresponding to the wearer's belly) is arranged around the wearer's belly. This is an example in which a plurality of belly elastic members 44 are arranged so as to surround them.

  About these elastic materials, the structure similar to the opening part elastic material already described is employable. Then, after considering the degree of gather contraction and the like, the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  The “tape-type disposable diaper” is arranged so as to cover the absorber, the top surface of the absorber, at least a part of the top sheet made of a liquid-permeable material, and the bottom surface of the absorber. It is arranged and comprises a back sheet made of a liquid-impermeable material, and is composed of each part of the front body, the crotch part and the back body, and is arranged to extend from the left and right side edges of the back body, It means a disposable diaper that further includes a fastening tape for fixing the front body and the back body, and that can fix the front body and the back body of the diaper to each other by the fastening tape. You may arrange | position the hook material of a mechanical fastener in the front end side area | region of a fastening tape, and the loop material of a mechanical fastener as a front patch in the front body part of a diaper.

  In addition, the “pants-type disposable diaper” means that a waist opening and a pair of leg openings are formed by joining the corresponding side edges of the front and back bodies together, It shall mean a structured diaper.

  Furthermore, the “one-piece type” includes a top sheet, a back sheet, and an absorbent body, but an absorbent body that performs absorption and holding functions is interposed (built-in) between the top sheet and the back sheet, and is equipped with a function. This means a diaper of a type integrally formed with a top sheet and / or a back sheet.

  On the other hand, the “two-piece type” has an absorbent main body that functions to absorb and retain the excrement of the wearer (absorption / retention function), and a function that encapsulates the wearer's body (mounting function). It shall consist of an exterior member, and shall mean the type of diaper with which the absorptive main body was arrange | positioned inside the exterior member. Here, the “absorbent body” is a member including an absorbent body, a top sheet, and a back sheet as constituent elements.

  The absorbent article of the present invention is disposed so as to cover the absorbent body, the upper surface of the absorbent body, and is disposed so as to cover at least a part of the top sheet made of a liquid-permeable material and the lower surface of the absorbent body. And a back sheet made of a liquid-impermeable material, and a stool receiving sheet and a stool receiving lower sheet are attached to the upper surface side of the top sheet.

  The absorbent article of the present invention is characterized in that a toilet receiving sheet and a toilet receiving lower sheet are attached, and the structure of the main body of the absorbent article includes the absorber, the top sheet, and the back sheet. As long as it is not particularly limited. For example, it may be a tape-type disposable diaper or a pants-type disposable diaper. In the case of a pants-type disposable diaper, it may be a one-piece type or a two-piece type. Furthermore, it is not limited to a disposable diaper, but may be a urine pad or the like.

[2] Manufacturing method:
Hereinafter, an example of the method of manufacturing the disposable diaper of the present invention will be described with reference to an example of manufacturing the disposable diaper 1 (two-piece type pant diaper) as the absorbent article shown in FIGS. 1 and 2.

[2-1] Production of absorbent main body:
An absorber 22 wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet 20, and a top sheet 18 is disposed on the upper surface. Next, the absorbent main body 14 is obtained by sealing the periphery of the absorbent body 22 so as to be sandwiched between the top sheet 18 and the back sheet 20.

[2-2] Production of solid gathers:
One end of the sheet material 32a (32b) is folded, and the three-dimensional gathers 26a (26b) are bonded together by sandwiching the two three-dimensional gather elastic members 36a, 36b (36c, 36d) between the folded portions. Get.

[2-3] Attachment of a toilet receiving sheet and a toilet receiving lower sheet to the absorbent main body:
After the both ends of the toilet receiving lower sheet 50b and the toilet receiving sheet 50a are bonded to the surface of the top sheet 18 constituting the absorbent main body 14, the absorbent main body 14, the toilet receiving lower sheet 50b, and the toilet receiving sheet 50a side The three-dimensional gathers 26a and 26b are bonded together so as to sandwich the edge.

[2-4] Production of exterior member:
First, two nonwoven fabrics to be the exterior member 16 are prepared, and a waist elastic member 42, an abdominal elastic member 44, and a leg elastic member 40 are disposed on and bonded to the upper surface of one of the nonwoven fabrics. And by laminating and fixing another nonwoven fabric on the upper surface, the waist elastic member 42, the belly elastic member 44 and the leg elastic member 40 are interposed between the two nonwoven materials. The exterior member 16 is obtained.

[2-5] Manufacture of disposable diapers:
The absorbent main body 14 is disposed and fixed near the crotch part of the exterior member 16. Next, the absorbent body 14 is turned inside, and the front body 2 and the back body 6 are folded in two so that the front body 2 and the back body 6 are matched, and the front body 2 and the back body 6 are joined by means such as heat sealing to form the joint 8. By doing so, the disposable diaper 1 shown in FIG. 1 and FIG. 2 can be manufactured.

  The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material or stretchable material from a roller, it becomes possible to continuously manufacture disposable diapers, which contributes to an improvement in productivity.

  The absorbent article of the present invention can be suitably used as a disposable diaper for an infant or an adult such as an elderly person or a disabled person who needs care and an auxiliary member thereof.

It is a top view showing the state where the disposable diaper which is one embodiment of the absorptive article of the present invention was developed, and it was seen from the absorptive main part side of a diaper. It is a schematic sectional drawing of the disposable diaper which is one Embodiment of the absorbent article of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 1 along the X-X 'line.

Explanation of symbols

1: Absorbent article (disposable diaper), 2: Front body, 4: Crotch, 6: Back body, 14: Absorbent body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber , 26, 26a, 26b: solid gather, 36, 36a, 36b, 36c, 36d: solid gather stretchable material, 40: leg stretchable material, 42: waist stretchable material, 44: belly stretchable material, 50a: toilet receiver Sheet, 50b: Stool receiving lower sheet, 52: Through hole.

Claims (2)

An absorber, a top sheet that is arranged so as to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material, and a surface that covers the lower surface of the absorber, and is made of a liquid-impermeable material With a backsheet
On the upper surface of the top sheet, further comprising a toilet receiving lower sheet and a toilet receiving sheet in order from the top sheet side,
A plurality of through holes are perforated in the hydrophobic nonwoven fabric of the stool receiving sheet,
The stool permeation speed V ₁ of the stool receiving sheet, the stool permeation speed V ₁ ′ of the stool receiving sheet before drilling a plurality of through holes, the stool permeation speed V _{2 of the} lower stool receiving sheet, and the top sheet The stool permeation speed V ₃ is expressed by the following formula (1)
_{V 2> V 1> V 3} > V 1 '(1)
Absorbent articles that satisfy. The absorbent article according to claim 1, wherein the stool receiving sheet and the stool receiving lower sheet are disposed on the top sheet at least in a region facing the anus.

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