JP2012192115A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper which can prevent the upper buttock of a wearer from being easily exposed in the back side, regardless of a posture or a somatotype the wearer has, and can save the wearer from urinary incontinence.SOLUTION: The disposable diaper 1, which includes a front bodice 2, an inside leg part 4, and a back bodice 6, has a shape of pants with one waist surrounding opening 10 and a pair of leg surrounding openings 12 formed, and further is supplied with an absorbent body and an enveloping body 16 with a pair of side border connecting parts 8 formed between the front bodice 2 and the back bodice 6 by connecting their respective corresponding side borders with each other in order to envelope the waist of the wearer, wherein the top end border 6c of the back bodice 6 is located above a baseline l which has its both ends at the top ends of the pair of side border connecting parts 8, while the back bodice 6 has an expansion area 50 bulging out of the baseline l.

Description

  The present invention relates to a disposable diaper. More specifically, the back body has an extension region that protrudes upward from a reference line having both ends of the pair of side edge joints at both ends, and the upper part of the buttocks protrudes at the back side portion regardless of the posture and body shape of the wearer. The present invention relates to a disposable diaper that can be easily prevented and can suppress the occurrence of urine leakage.

  In disposable diapers, elastic materials are usually placed around the legs and around the waist to prevent urine leakage. However, even a disposable diaper in which such an elastic material is disposed, a gap may be generated around the waist of the diaper depending on the posture of the wearer, causing urine leakage.

  For such a problem, it is conceivable to increase the elastic force of the elastic material around the waist, but this is not preferable because it may force excessive pressure on the wearer's stomach. Therefore, in consideration of such a problem, a diaper in which a high wearing pressure region having a higher pressure than the region around the waist opening is formed below the waist opening (see, for example, Patent Document 1). .

JP 2010-279813 A

  The diaper disclosed in Patent Document 1 improves the adhesion between the diaper and the wearer by using a mounting pressure that acts on the diaper. However, even a diaper using such a mounting pressure has the following problems depending on the posture and body shape of the wearer. For example, if the wearer is sitting for a long time, the belly side can afford to rise compared to the back side, the diaper's ventral part is too long, the back part is not long enough, and the upper part of the buttocks tends to protrude . Therefore, urine leakage occurs in the dorsal portion, and the extra length is folded back in the ventral portion, which may cause an unpleasant wearing feeling and skin trouble due to stuffiness. In particular, when an elderly wearer takes a posture of sitting for a long time such as using a wheelchair, it becomes easy to take a forward-bent posture, and this influence becomes particularly significant.

  For such wearers, the caregiver also corrects the posture. However, there is a case where the body is pulled up while holding both sides during the care work, and as a result, the back side of the diaper may be excessively lowered. For this reason, the upper part of the buttocks protrudes from the back portion, so that the feeling of wearing is not good, and urine leakage may also occur.

  Moreover, when a wearer is a circular back, the part which hits the stomach of the diaper may reach to the chest, and it may be worn in an unnatural form. In this case, similarly to the above, the diaper's belly part is excessively long, and the back part is insufficient in length, and the upper part of the buttocks easily protrudes. Therefore, urine leakage occurs in the dorsal portion, and the extra length is folded back in the ventral portion, which may cause an unpleasant wearing feeling and skin trouble due to stuffiness.

  In addition, when the wearer is a so-called taiko belly, it may not be worn properly around the waist. Moreover, even if it is a case where it equips appropriately around a waist, a diaper may slip | deviate from a waist periphery (especially stomach periphery) with progress of time. Along with this, the upper part of the buttocks protrudes from the dorsal portion, and urine leakage may occur. In addition, the length of the ventral portion may be folded back, which may cause an unpleasant wearing feeling and skin trouble due to stuffiness.

  The present invention has been made in view of such problems of the prior art. An object of the present invention is to provide a disposable diaper that can prevent the upper part of the buttocks from protruding easily at the dorsal part and suppress the occurrence of urine leakage regardless of the posture and body shape of the wearer. There is.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the above-mentioned problems can be solved by forming a stretched area that protrudes upward from the edge joints at both ends on the back body. The present invention has been completed.

  That is, according to this invention, the disposable diaper shown below is provided.

  [1] A pant-shaped body comprising a front body, a crotch part, and a back body, and having a waist opening and a pair of leg openings, an absorbent body, the front body, and the back body And a pair of side edge joint portions formed to form a pair of side edge joint portions, and an outer body covering the circumference of the waist of the wearer, the upper ends of the pair of side edge joint portions at both ends The disposable diaper which has the extending | stretching area | region in which the upper end edge of the said back body is located above the said reference line, and the said back body protrudes from the said reference line with respect to the reference line made.

  [2] The disposable diaper according to [1], wherein an upper end edge of the front body is positioned below the reference line.

  [3] The disposable diaper according to [1] or [2], including a fastening tape that fixes the stretched region on both side edges of the stretched region.

  [4] The absorber is disposed from the front body of the exterior body to the back body through the crotch, and the absorber is located above the reference line in the back body, The disposable diaper according to any one of [1] to [3], which is also disposed in the stretching region.

  The disposable diaper of the present invention has an effect of preventing the upper portion of the buttocks from protruding easily at the back portion and suppressing the occurrence of urine leakage regardless of the posture and body shape of the wearer. .

It is a perspective view showing typically one embodiment of the disposable diaper of the present invention. It is an outline top view showing typically the state where the disposable diaper shown in Drawing 1A was developed and it looked from the top sheet direction. It is a schematic end view which shows typically the A-A 'cutting | disconnection end surface of the disposable diaper shown to FIG. 1B. It is a schematic end view which shows typically the B-B 'cut end surface of the disposable diaper shown in FIG. 1B. It is a perspective view which shows typically other embodiment of the disposable diaper of this invention. It is a schematic plan view which shows typically the state which developed the disposable diaper shown in Drawing 2A, and was seen from the top sheet direction. It is a perspective view which shows typically other embodiment of the disposable diaper of this invention. It is the schematic plan view which shows typically the state which expand | deployed the disposable diaper shown to FIG. 2C, and was seen from the top sheet direction. It is a perspective view which shows typically other embodiment of the disposable diaper of this invention. It is a perspective view which shows typically other embodiment of the disposable diaper of this invention. It is a perspective view which shows typically other embodiment of the disposable diaper of this invention. It is a mimetic diagram showing the state where the wearer of the back is wearing the disposable diaper of the present invention, and the wearer is sitting.

  Hereinafter, the form for implementing the disposable diaper of this invention is demonstrated concretely by the example of a pants-type disposable diaper. However, the present invention broadly encompasses disposable diapers having the invention specific items, and is not limited to the following embodiments.

[1] Definitions etc .:
The “disposable diaper” means an absorbent article having a front body and a back body that enclose the circumference of the wearer's waist, and a crotch portion in which an absorbent body is disposed and encapsulates the wearer's crotch. Disposable diapers are usually made of a liquid-permeable material at least partially, a topsheet arranged to cover the surface of the absorber, and a liquid-impermeable material so as to cover the back surface of the absorber. And a back sheet disposed in the.

  In this specification, “front body”, “inseam” and “back body” are defined as follows. As described above, the front body and the back body are portions that enclose the waist of the wearer. “Envelop around the waist” means that a cylindrical shape surrounding the waist of the wearer is formed by a part of the disposable diaper.

  An example of a diaper having a “tubular structure” is a pants-type disposable diaper. The “pants type” refers to a disposable diaper having a pant shape in which one waist opening 10 and a pair of left and right leg openings 12 are formed, as in the disposable diaper 1 shown in FIGS. 1A to 1D. In such a “pants-type” diaper, the tubular structure is formed by a portion sandwiched between the side edge joint portions 8 of the exterior body 16.

  Moreover, a crotch part points out the part which encloses a wearer's crotch among disposable diapers as mentioned above, ie, the part between a front body and a back body. An absorber for absorbing and holding excrement is disposed in the crotch. It does not specifically limit about the structure of an absorber, The absorber used for a conventionally well-known absorbent article can be used. A specific configuration of the absorber will be described later.

  The disposable diaper of this invention consists of each part of the front body 2, the crotch part 4, and the back body 6, as shown to FIG. 1A-FIG. 1D, and the side edge part (2a and 2a corresponding to the front body 2 and the back body 6 is included. 6a and 2b and 6b) are joined together to form a pair of side edge joints 8, and a pant-type with a waist opening 10 and a pair of leg openings 12 (12a, 12b) formed. There is an absorbent article that includes an exterior body 16 and an absorbent main body 14 that is disposed inside the exterior body 16 and is an absorbent pad in which the absorbent body is included.

  Although not shown, the abdominal exterior body constituting the front body and the back exterior body constituting a part of the back body are configured as separate bodies, and are spanned between the abdominal exterior body and the back exterior body. There is also an absorbent article in which an absorbent main body is arranged. As this form, for example, there is a form in which the crotch part is formed by a part of the back exterior body and a part of the absorbent main body, and the absorbent body is arranged as a part of the absorbent main body.

[2] Configuration of disposable diaper of the present invention:
The present invention includes, for example, 1) a front body 2, a crotch part 4 and a back body 6, as shown in FIGS. 1A to 1D, and includes a waist opening 10 and a pair of leg openings 12 (12a). 12b) is formed, and the absorbent body 22, the corresponding side edge portions 2a and 6a of the front body 2 and the back body 6, and 2b and 6b are joined together to form a pair of side edge joint portions 8 And 2) an upper end of the back body 6 with respect to a reference line 1 having the upper ends of the pair of side edge joints 8 as both ends. The disposable diaper 1 is characterized in that the edge 6c is located above the reference line l and the back body 6 has an extending region 50 that protrudes from the reference line l.

  In the disposable diaper of the present invention, the upper end edge of the back body is located above the reference line with respect to the reference line having the upper ends of the pair of side edge joints as both ends, and the stretched region where the back body protrudes from the reference line It is what has. As described above, since the disposable diaper of the present invention has an extended region where the back body protrudes from the reference line, the upper part of the buttock is prevented from easily protruding from the back side portion regardless of the posture and body shape of the wearer. In addition, the occurrence of urine leakage can be suppressed. For example, as shown in FIG. 4, even when the wearer 100 has a circular back and is sitting on a chair, the extension region 50 of the back body 6 covers the buttock, and the upper part of the buttock easily protrudes from the back side portion. And the occurrence of urine leakage can be suppressed.

  Specifically, the upper edge of the back body is preferably located 3 to 20 cm above the reference line, more preferably 5 to 10 cm above, although it varies depending on the diaper size. Since the upper edge of the back body is located 3 cm or more above the reference line, it is possible to prevent the upper portion of the buttocks from protruding easily at the back side portion and to suppress the occurrence of urine leakage. On the other hand, since the upper end edge of the back body is not positioned 20 cm or more above the reference line, it is possible to prevent the flexible stretched region from being bent or turned and impairing the effect of the present invention.

  The form of the stretched region is not particularly limited. For example, as shown in FIG. 1A, it may be rectangular. Further, as shown in FIG. 2A, the upper end edge 6c of the back body 6 may have a gentle elliptic curve like a rugby ball. Furthermore, as shown to FIG. 2C, the form which the upper end edge 6c of the back body 6 draws a semicircle-shaped curve may be sufficient. Among these, when the fastening tape is disposed as described later, from the viewpoint of easy alignment, a rectangular shape is preferable as shown in FIG. 1A.

  As shown to FIG. 1A and FIG. 2A-FIG. 2D, it is preferable to arrange | position the elastic material 42 around a waist along an extending | stretching area | region in an extending | stretching area | region. Further, as shown in FIGS. 3A to 3C, an elastic material 46 different from the waist elastic material 42 may be arranged in parallel with the reference line l. Thus, by arrange | positioning an elastic material in an extending | stretching area | region, the fit property to a wearer can be improved. The stretchable material is not particularly limited. It can be comprised with the same thing as the various elastic materials mentioned later.

  Moreover, as for the disposable diaper of this invention, as shown to FIG. 3A-FIG. 3C, it is preferable that the upper end edge 2c of the front body 2 is located below the reference line l. That is, it is preferable that the disposable diaper of this invention takes the form where the upper end edge 2c of the front body 2 is convex downward. The upper edge 2c of the front body 2 has a downwardly convex shape, so that when sitting for a long time like a wearer using a wheelchair, muscle strength is reduced, or the body is bent forward due to a circular back. In the case of an elderly person, even if the abdomen has more crotch than the dorsal side, it is possible to suppress the extra length at the abdomen. Therefore, it can suppress that the surplus length is turned up by the abdominal side part, and it causes the skin trouble by an unpleasant wearing feeling and stuffiness. 3A to 3C, the waist elastic member 42 disposed on the front body 2 is cut so that the upper end edge 2c of the front body 2 has a downwardly convex shape. However, the waist elastic member 42 may be disposed along the upper edge 2 c of the front body 2.

  Moreover, even when the wearer's body shape is round, especially in the lower part of the spine, it is possible to prevent the diaper's original stomach part from reaching the chest and wearing it in an unnatural form. . For this reason, it is possible to suppress that the abdomen portion is excessively lengthy and the excess length is folded back to cause an unpleasant wearing feeling or skin trouble due to stuffiness.

  Furthermore, when the wearer's body shape is a so-called taiko belly, the wearer can appropriately wear it at the portion corresponding to the original stomach of the diaper from the beginning, not around the navel having a large circumference in the vicinity of the lower abdomen. That is, the diaper fit can be improved. Moreover, since the waist gather part of a diaper does not contact | abut the circumference | surroundings of a navel with large circumference, it can prevent that a diaper falls out of a waist circumference (especially belly circumference) with progress of time. For this reason, it is possible to prevent the waist portion from slipping off and the length from being folded back at the abdomen side portion, causing unpleasant wearing feeling and skin troubles due to stuffiness.

  Specifically, the upper end edge of the front body is preferably located 2 to 10 cm below the reference line, and more preferably 3 to 5 cm below. The above-mentioned effect can be expressed by the upper end edge of the front body being positioned 2 cm or more below the reference line. On the other hand, since the upper end edge of the front body is not located 10 cm or more below the reference line, it is possible to prevent urine leakage from the front body.

  The form of the downward projection taken by the upper end edge 2c of the front body 2 is not particularly limited. For example, as shown in FIG. 3A, the cut shape of the front body 2 may be a rectangle. Further, as shown in FIG. 3B, the upper end edge 2c of the front body 2 may have a gentle elliptic curve like a rugby ball. Furthermore, as shown to FIG. 3C, the form which the upper end edge 2c of the front body 2 draws a semicircle-shaped curve may be sufficient. Among these, the form shown in FIG. 3B and FIG. 3C is preferable so that there is no unpleasant touch when in contact with the wearer.

  Furthermore, it is preferable that the disposable diaper of this invention has the fastening tape 11 which fixes the extending | stretching area | region 50 to the both-sides edges 50a and 50b of the extending | stretching area | region 50, as shown to FIG. By having such a fastening tape 11, it is possible to suppress the stretching region 50 where the back body 6 protrudes from the reference line l from being bent or turned up. Therefore, the disposable diaper of this invention can be used in the aspect which exhibits the effect of this invention as mentioned above to the maximum.

  The form of the fastening tape is not particularly limited as long as it fixes the stretched region. For example, the form which connects fastening tapes may be sufficient. In addition, a fastening tape is attached around the waist of the front body of the disposable diaper so that the fastening tape can be removed, for example, a front patch made of a loop material usually provided in a tape-type disposable diaper is attached, and the fastening tape is attached to the front It may be connected to the patch.

  Furthermore, the fastening member of the fastening tape is not particularly limited. However, it is preferable to use a mechanical fastener (planar fastener) that has a high fastening force and does not easily reduce the fastening force even after a plurality of detachments. For example, there is a form in which a hook material of a mechanical fastener is attached in the vicinity of the front end of the fastening tape, and a front patch made of a loop material of the mechanical fastener is attached around the other fastening tape or the waist of the front body.

  The number of fastening tapes is not particularly limited, and an appropriate number of fastening tapes may be attached according to the dimensions of the wearer's body shape (specifically, around the waist, the back of the circle, etc.). Specifically, a pair of fastening tapes (one on each side) may be provided.

  In the disposable diaper of the present invention, as shown in FIGS. 2A to 2D, the absorber 22 is arranged from the front body 2 of the exterior body through the crotch part 4 to the back body 6. It is preferable that the absorber 22 is located above the reference line l and is also disposed in the extending region 50. By arranging the absorbent body 22 in this way, it is possible to impart rigidity to the extent that the wearer does not feel uncomfortable in the flexible stretched region 50 where the back body 6 protrudes from the reference line l. Therefore, the stretched region can be prevented from being bent or turned, and the disposable diaper of the present invention can be used in a mode that further exhibits the effects of the present invention as described above.

[3] Components of disposable diapers:
The disposable diaper of the present invention is composed of the front body 2, the crotch part 4, and the back body 6, as in the disposable diaper 1 shown in FIGS. 1A to 1D, and includes one waist opening 10 and a pair of leg openings. It presents a pant-type in which the portion 12 (12a, 12b) is formed, and at least the absorber 22 and corresponding side edge portions (2a and 6a and 2b and 6b) of the front body 2 and the back body 6 are joined together. An exterior body 16 that encloses the wearer's waist and is provided with a pair of side edge joint portions 8 as a constituent member.

[3-1] Absorber:
The “absorber” is a member for absorbing and holding the wearer's urine and the like, and is made of an absorbent material. Examples of the absorbent material include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. As the fluff pulp, wood pulp or non-wood pulp defibrated in a cotton-like form, the SAP as sodium polyacrylate, the hydrophilic sheet as tissue, absorbent paper, a non-woven fabric subjected to a hydrophilic treatment, etc. Is preferably used.

  As the “absorber”, it is preferable to use a material in which one or more absorbent materials are formed into a single-layer or multi-layer mat. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, SAP may be mixed in a fluff pulp mat, or may be used in a layered manner between layers of a plurality of mats. In order to prevent the SAP from falling off and to impart shape stability, it is preferable to encapsulate the entire absorbent body with a hydrophilic sheet. The disposable diaper 1 shown to FIG. 1C and FIG. 1D is the example which encapsulated the absorber 22 whole with the upper tissue 54 and the lower tissue 56 which are hydrophilic sheets.

  What is necessary is just to use what was shape | molded in desired shapes, such as rectangular shape and an hourglass shape, according to the objective. A disposable diaper 1 shown in FIG. 1B is an example using a rectangular absorbent body 22. The “absorber” is coated on the front side with a top sheet and on the back side with a back sheet. That is, it is arranged between the top sheet and the back sheet.

[3-2] Top sheet:
The “top sheet” is a sheet-like member arranged so as to cover the surface of the absorbent body (the surface on the side facing the wearer's skin when the disposable diaper is worn). Since it is necessary to allow the wearer's urine or the like to pass therethrough, at least a part (all or a part) of the wearer's urine is made of a liquid-permeable material.

  Examples of the liquid permeable material include woven fabric, nonwoven fabric, and porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide, etc., which has been subjected to a hydrophilic treatment.

  As said nonwoven fabric, the nonwoven fabric manufactured by manufacturing methods, such as air through (card hot air) and card | curd embossing, can be used conveniently. The hydrophilic treatment can be performed by applying, spraying, impregnating, etc., a surfactant to the raw cotton of the nonwoven fabric.

  The top sheet is “at least partially” made of a liquid-permeable material. The position is not particularly limited. However, it is preferable that the part which overlaps with the arrangement position of the absorber in the crotch portion when viewed in plan is made of a liquid-permeable material.

  In the disposable diaper of the present invention, it is not necessary that the entire surface on the side facing the wearer's skin is covered with the top sheet. For example, a top sheet made of a liquid permeable material and a side sheet made of a breathable water repellent material may be combined. At this time, it is preferable to use a nonwoven fabric sheet obtained by a method such as card embossing or spunbond, particularly a highly waterproof nonwoven fabric sheet such as SMS or SMMS, as the air-permeable and water-repellent material.

[3-3] Backsheet:
The back sheet is a sheet-like member arranged so as to cover the back surface of the absorbent body (the surface facing away from the wearer's skin when the disposable diaper is worn). 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.

  There is no restriction | limiting in particular about the arrangement position of a back seat | sheet. From the viewpoint of preventing leakage of urine absorbed by the absorbent body, it is preferable that the back sheet is disposed so as to cover at least the position where the absorbent body is disposed.

  Examples of the liquid impermeable material include a liquid impermeable film made of a resin such as polyethylene. Among these, it is preferable to use a microporous polyethylene film. This microporous polyethylene film is a film in which a large number of fine pores of 0.1 to several μm are formed, and is liquid-impermeable but has moisture permeability. Therefore, it is possible to prevent the diaper from being steamed while ensuring the leak-proof property.

[3-4] Solid gathering:
The disposable diaper is usually composed of a water-repellent sheet 32 as in the disposable diaper 1 shown in FIGS. 1B and 1C, and includes a pair of left and right three-dimensional gathers 26 (26 a and 26 b) disposed on both sides of the absorbent body 22. Yes.

  A three-dimensional gather can be comprised according to the conventional disposable diaper. As shown in FIG. 1C, a stretched three-dimensional gather stretchable material 36 is sandwiched between layers of the water-repellent sheet 32 and fixed. At this time, as the water repellent sheet, the same material as that of the side sheet can be suitably used.

  In the case of the disposable diaper of the present invention, as shown in FIG. 1C, a water-repellent sheet 32 for forming a three-dimensional gather is separately attached to the absorbent main body 14, and the three-dimensional gather 26 is configured integrally with the absorbent main body 14. Is often used.

  1B and 1C, the disposable diaper 1 is provided with side edge elastic members 38 on both side edges of the three-dimensional gather 26 in addition to the three-dimensional gather elastic material 36. When the side edge stretchable material is arranged in this manner, in the diaper being worn, both side edges of the absorbent main body described later tend to rise from the absorbent body. Such a form makes it easy for urine to collect in the widthwise central portion (that is, the absorbent body) of the absorbent main body after urination, making it difficult for urine leakage to occur.

[3-5] Various elastic materials:
In the disposable diaper of the present invention, it is preferable to dispose elastic materials such as waist elastic materials, leg elastic materials, and belly elastic materials.

  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.

  The leg circumference elastic material is an elastic material for forming a leg circumference gather. In the case of the disposable diaper of the present invention, as shown in FIG. 1A and FIG. 1B, a form in which a plurality of linear leg-surrounding elastic members 40 are arranged in a curved line along the outer edge of the leg-surrounding opening 12 is often used. In this form, it is preferable to arrange the leg elastic members 40 so as not to cross the center of the crotch part 4. By preventing the contraction force of the leg elastic member 40 from acting on the center of the crotch part 4, the absorbent body 22 can be prevented from twisting and the fit of the absorbent body 22 in the crotch part 4 can be improved.

  The belly circumference elastic material is an elastic material for forming a Tammy gather in the disposable diaper of the present invention. As shown in FIGS. 1A and 1B, a form in which a plurality of linear abdominal circumference elastic members 44 are linearly arranged in a portion corresponding to the circumference of the wearer's abdomen is often used. Also in this embodiment, for the same reason as in the case of the leg-surrounding elastic member, it is preferable that the belly-surrounding elastic member 44 is disposed so as not to cross the portion where the absorber 22 is disposed.

  As elastic materials, flat rubber made of natural rubber and thread rubber made of elastic yarn of synthetic rubber (urethane rubber, etc.), elastic net, elastic film, elastic foam (urethane foam, etc.), etc. are preferably used. be able to.

  It is preferable to fix the stretchable material in a stretched state of 120 to 400% in order to apply a sufficient stretching force without exerting an excessive tightening force on the wearer, and in a stretched state of 200 to 300%. It is preferable to fix. The stretchable material can be fixed by, for example, adhesion using a hot melt adhesive, other highly fluid adhesive, heat sealing, heat sealing, or ultrasonic welding.

  In the case of the disposable diaper of the present invention, the stretchable linear stretch material 40, the waist stretchable material 42, and the waist stretchable material 44 are all stretched between the inner sheet 16a and the outer sheet 16b of the outer package 16, for example. It can arrange | position by the method of fixing so that it may be inserted | pinched. In the example shown in FIG. 1A and FIG. 1B, the leg elastic member 40, the waist elastic member 42 and the belly elastic member 44 are stretched between the inner sheet 16 a and the outer sheet 16 b of the outer package 16. It is arranged by the method of fixing so as to sandwich.

[3-6] Absorbent body:
The absorptive main body 14 is an absorbent pad in which the absorbent body 22 is included, and is a member that encapsulates the wearer's crotch.

  “Absorption pad” refers to a pad-shaped member in which an absorbent body, a liquid-permeable top sheet, and a liquid-impermeable back sheet are integrally formed. For example, in the disposable diaper 1 shown in FIGS. 1C and 1D, the top sheet 18 and the back sheet 20 are bonded to each other at the periphery of the absorbent body 22, so that the absorbent body 22 is included between the top sheet 18 and the back sheet 20. The absorbent main body 14 is used in which these members are integrally formed. This absorptive main body 14 is an example of an absorptive main body in which the above-described three-dimensional gather 26 is integrally formed in addition to the absorber 22, the top sheet 18, and the back sheet 20.

[3-7] Exterior body:
The “exterior body” is a member that encloses the waist around the wearer, and is a pants type that is formed with a single waist opening and a pair of leg openings, either alone or integrally with the absorbent main body. It is a sheet-like member which exhibits. In the case of the disposable diaper of the present invention, as shown in FIG. 1A, there may be used a member having a pants shape in which one waist opening 10 and a pair of leg openings 12a and 12b are formed. In this case, as shown in FIGS. 1A to 1B, the exterior body 16 forms the front body 2, the crotch 4, and the back body 6 of the diaper.

  Although not shown, the abdominal exterior body constituting the front body and the back exterior body constituting a part of the back body may be configured separately. In this structure, an absorptive main body is arrange | positioned so that it may span between an abdominal exterior body and a back exterior body.

  As shown in FIG. 1A, the exterior body 16 has a portion (side edge portion) near the side edges 2a and 2b of the front body 2 and a corresponding portion (side edge portion) near the side edges 6a and 6b of the back body 6. Are commonly joined together (side edge joint portion 8), so that one waist opening 10 and a pair of leg openings 12a and 12b are formed, and are configured to have a pants shape. is there.

  However, the exterior body is not limited to the above configuration. For example, an engageable fastener member is attached to the corresponding side edge portion of the front body and the back body, and can be formed into a pants shape by mutually engaging the fastener members, or the front body and the back Those configured so that corresponding side edge portions of the body are engaged with each other in advance by a detachable fastener member so as to exhibit a pants shape are also included in the “exterior body” in this specification. Examples of the fastener member include a mechanical fastener.

  The material of the outer package is not particularly limited, but it is preferably composed of a material having excellent air permeability, for example, a nonwoven fabric made of polyethylene, polypropylene, polyester, or other synthetic fibers so as to prevent stuffiness inside the diaper.

  The exterior body is often configured by bonding two or more non-woven fabrics together. For example, the disposable diaper 1 shown in FIGS. 1A to 1D is an example in which the exterior body 16 is composed of two nonwoven fabrics (an inner sheet 16a and an outer sheet 16b). However, you may comprise by 3 or more nonwoven fabrics together using other sheet materials like the pressing sheet mentioned later.

  In addition, it is preferable that the disposable diaper of this invention consists of a nonwoven fabric sheet, and is further provided with the pressing sheet which coat | covers the front end or rear end of an absorptive main body. By providing the pressing sheet, the front end or the rear end of the absorbent main body is sealed, and the bonded portion of the top sheet 18 and the back sheet 20 is reinforced. Therefore, the SAP inside the absorber 22 is difficult to leak out.

  The pressing sheet may be configured by using a part of a nonwoven fabric sheet that constitutes another member of the diaper (such as an exterior body), or may be separately provided with a nonwoven fabric sheet that is independent from the other member. Good.

  The form shown to FIG. 1B is an example using some nonwoven fabric sheets which comprise another member. Specifically, the folded portion of the outer sheet 16b is used as a pressing sheet, and the front end or the rear end of the absorbent main body 14 is covered with the folded portion. However, you may attach a nonwoven fabric sheet independent from another member separately. Specifically, the front end or the rear end of the absorbent main body 14 may be covered with a pressing sheet independent from other members.

  The disposable diaper of the present invention can be suitably used as a diaper for infants or for adults such as elderly people and persons with disabilities who need care.

1: disposable diaper, 2: front body, 2a, 2b: side edge, 2c: upper edge, 4: crotch part, 6: back body, 6a, 6b: side edge, 6c: upper edge, 8: side edge joint 10: Opening around waist, 11: Fastening tape, 12, 12a, 12b: Opening around leg, 13: Front patch, 14: Absorbent body, 16: Exterior body, 16a: Inner sheet, 16b: Outer sheet 18: Top sheet, 20: Back sheet, 22: Absorber, 26, 26a, 26b: Solid gather, 32: Water-repellent sheet, 36: Solid gather stretchable material, 38: Side edge stretchable material, 40: Stretch around leg Material: 42: Elastic material around waist, 44: Elastic material around belly, 46: Elastic material, 50: Stretched region, 50a, 50b: Side edges, 51: Elastic sheet, 54: Upper tissue, 56: Lower tissue, 100: Wearer, 01: chair, l: the reference line

Claims (4)

It consists of each part of the front body, the crotch part, and the back body, presents a pants-type with one waist opening and a pair of leg openings, and the absorbent body corresponds to the front body and the back body The side edges are joined together to form a pair of side edge joints.
A disposable diaper having an extension region in which an upper end edge of the back body is positioned above the reference line with respect to a reference line having both ends of the pair of side edge joints as both ends, and the back body protrudes from the reference line .   The disposable diaper according to claim 1, wherein an upper end edge of the front body is located below the reference line.   The disposable diaper of Claim 1 or 2 which has the fastening tape which fixes the said extending | stretching area | region to the both-sides edge of the said extending | stretching area | region. The absorber is arranged from the front body of the exterior body to the back body through the crotch,
The disposable diaper as described in any one of Claims 1-3 in which the said absorber is located above the said reference line, and is arrange | positioned also in the said extending | stretching area | region in the said back body.

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