JP3501635B2 - Disposable diapers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-shaped disposable diaper for infants, adults or incontinence.

[0002]

2. Description of the Related Art Conventionally, in this type of disposable diaper, an absorbent body is arranged between a liquid-permeable sheet on the front surface side and a liquid-impermeable sheet on the back surface side, both sides of a leg part of the diaper body. There is known a structure in which leg gathers are formed along the edges and the leg gathers are located inside the leg gathers and are erected along both sides of the liquid-permeable sheet along the longitudinal direction.

For example, as described in JP-A-3-123553, a liquid-permeable sheet on the front side and a liquid-impermeable sheet on the back side are formed on the back waist and the leg parts on both sides. The crotch portion and the abdominal waist portion having the are formed sequentially in the longitudinal direction, and are arranged flat in the central portion between the liquid-permeable sheet on the front surface side and the liquid-impermeable sheet on the back surface side. There is known a pants-shaped disposable diaper provided with a central absorbent body and side absorbent bodies standing upright on both sides of the central absorbent body.

Further, as described in Japanese Patent Application Laid-Open No. 9-51913, the absorber disposed between the liquid-permeable sheet on the front surface side and the liquid-impermeable sheet on the back surface side has a thickness direction. There is known a pants-shaped disposable diaper in which longitudinally extending intermittent groove lines are formed at intervals in the width direction and a liquid-permeable sheet and a liquid-impermeable sheet are bonded along the groove grooves. Has been.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the structure of the disposable diaper disclosed in Japanese Patent No. 553, since the central absorbent body is located flat along the longitudinal direction between the liquid-permeable sheet and the liquid-impermeable sheet, the absorbent material is absorbed in the crotch portion. The surface also becomes flat, the flow of the liquid is not fixed, and the original function of the absorber does not act effectively, causing side leakage. In addition, when wearing a diaper, indeterminate wrinkles tend to occur in the crotch region, which reduces the absorbability and causes liquid leakage.If the width of the absorbent body is wide so that liquid leakage does not occur, the adhesion with the skin during wearing will be improved. It has a bad and uncomfortable feeling.

Further, in the structure of the disposable diaper disclosed in Japanese Patent Laid-Open No. 9-51913, since the liquid-permeable sheet and the liquid-impermeable sheet are adhered to each other by the groove of the absorbent body, the absorbent body is Is fixed, the impermeable sheet on the back side shrinks in the width direction in the crotch region when the diaper is worn, the groove of the absorbent body does not work effectively, the adhesion to the skin is poor, and the liquid is difficult to be absorbed. In addition, when the width of the absorber is widened, the adhesion to the skin becomes worse when worn, and there is a problem that a feeling of strangeness occurs.

The present invention has been made in view of the above problems, and a constant fold portion is always formed when the diaper is worn, the diffusibility of liquid in the longitudinal direction and the width direction of the diaper body is improved, and the vicinity of the crotch region is improved. The disposable diaper has a large specific surface area for absorbing liquid in the diaper, and the absorber adheres to the skin in the crotch region to prevent liquid leakage and reduce discomfort when using the diaper. is there.

[0008]

A disposable diaper according to the present invention comprises a liquid permeable front sheet and a liquid impermeable back sheet, and a crotch region having a back waistline portion and leg leg portions on both sides. Symmetrical diaper body in which the first portion and the abdominal waist portion are sequentially and integrally formed in the longitudinal direction, and the first absorbent body is disposed between the liquid-permeable top sheet and the liquid-impermeable back sheet. And a second absorbent body sandwiched between the liquid-permeable upper surface sheet and the liquid-permeable lower surface sheet and laminated corresponding to the central portion in the longitudinal direction and the central portion in the width direction of the first absorbent body. The first absorbent body forms a longitudinal gap along the center in the width direction, and the liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and the second absorbent body are provided. A gap between the liquid-permeable bottom sheet and the central portion in the width direction formed on the first absorber of the diaper body Those bound by Luo width direction of the center line.

Since the liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body are combined, the second absorbent body absorbs the first absorbent material of the diaper body. It adheres to the skin without being affected by the body, and the liquid permeable top sheet or liquid impermeable back sheet of the diaper body and the liquid permeable bottom sheet of the second absorbent body are arranged in the width direction of the diaper body. By binding on the center line, the folds can be easily formed, the liquid diffuses in the longitudinal direction, the absorption function is improved, and the adhesion to the skin is improved.

The disposable diaper according to the second aspect of the invention is
The disposable diaper according to claim 1, wherein both side edges of a connecting portion along a widthwise central portion between the liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body. And a non-coupling portion that forms a gap in the thickness direction between the first absorber and the inner edge of the gap along the center in the width direction.

Then, the first non-bonding portion formed between the liquid permeable top sheet or the liquid impermeable back sheet of the diaper body and the liquid permeable bottom sheet of the second absorbent body. Due to the gap in the thickness direction of the absorber, the liquid flowing into the first absorber is diffused in the width direction from the non-bonding portion, the liquid is effectively absorbed by the first absorber, and the absorption rate of the liquid is increased. Further, the non-bonding portion between the liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body causes the first absorbent body to have a width in the crotch region. It can move freely in any direction and can be installed well without any discomfort.

The disposable diaper according to the invention of claim 3 is
The disposable diaper according to claim 1, wherein a connecting portion for connecting the liquid-permeable topsheet or the liquid-impermeable backsheet of the diaper body and the liquid-permeable bottom sheet of the second absorber is arranged in the width direction of the diaper body. It is formed at both ends in the longitudinal direction along the center line, and the middle part of the both end joints is a non-joint.

The liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorber are both longitudinal end portions along the widthwise center line of the diaper body. Are coupled, and the intermediate portion of this coupling portion is a non-coupling portion, so that the first absorbent body and the second absorbent body are separated from each other in the thickness direction, and the liquid flowing into the gap of the first absorbent body is The liquid is effectively absorbed by being diffused in the width direction through the connecting portion, so that the liquid absorbing performance is improved.

The disposable diaper according to the invention of claim 4 is
The disposable diaper according to any one of claims 1 to 3, wherein the outer edge in the width direction of the absorber member of the first absorber is pushed upward by the force toward the center in the width direction when the diaper body is attached. The absorbent member is slanted, and the absorbent members move toward the center in the width direction to move toward each other to move to the second position.
The absorbent body is pushed upward, and the first absorbent body and the second absorbent body form a wavy fold.

When the diaper is worn, the absorbent body member of the first absorbent body has both outer edges in the width direction inclined upward toward the skin side and approached each other toward the center in the width direction. The absorber is pushed upward to the skin side, and the folds are formed in a wave shape and both sides are erected to improve the adhesion to the skin and prevent liquid leakage.

The disposable diaper according to the fifth aspect of the invention is
The disposable diaper according to any one of claims 1 to 4, wherein the first absorbent body of the diaper body is formed of absorbent members divided at least along a center line in the width direction, and the first absorbent body is formed. A space is formed between the absorber members in the widthwise central portion along the longitudinal direction.

The absorbent member of the first absorbent body is composed of the liquid-permeable lower sheet of the second absorbent body and the liquid-permeable front sheet or liquid-impermeable back sheet of the diaper body and the second absorbent body. Since it does not overlap with the connecting part with the liquid permeable lower sheet, the first and second absorbers move freely in the width direction at the crotch when wearing the diaper, and there is no discomfort in wearing, and a feeling of wearing the diaper Will be good.

The disposable diaper according to the sixth aspect of the invention is
The disposable diaper according to any one of claims 1 to 5, wherein the second absorbent body has a plurality of continuous or intermittent groove grooves formed in the longitudinal direction between both side edges in the width direction.

When the diaper is worn, the second absorbent body has a plurality of folds formed by the groove, so that the absorbent surface area of the absorbent body capable of absorbing the liquid is increased in the vicinity of the crotch region, and the second absorbent member is closely attached to the crotch region. , The liquid is spread in the longitudinal direction of the diaper body to prevent liquid leakage.

The disposable diaper according to the invention of claim 7 is
The disposable diaper according to any one of claims 1 to 6, wherein elastic bodies are arranged in the longitudinal direction between the liquid-permeable upper sheet and the liquid-permeable lower sheet at both sides of the second absorbent body. It is a set and combined.

Then, the elastic bodies located on both sides of the second absorbent body expand and contract to surely form the folds in the second absorbent body, thereby closely contacting the skin and preventing liquid leakage.

The disposable diaper according to claim 8 is
In the disposable diaper according to claim 6, the second absorbent body forms a fold portion by a longitudinal groove due to a force toward the center in the width direction when the diaper body is attached.

When the diaper is worn, the first absorbent body is pushed up by the force toward the center in the width direction to push up the vicinity of the central portion in the width direction of the second absorbent body, forming a convex fold. Both side portions of the absorbent body of No. 1 are erected to improve the adhesion to the skin and prevent liquid leakage.

The disposable diaper according to the invention of claim 9 is
The disposable diaper according to claim 7 or 8, wherein three-dimensional gather portions that stand up on both side edges of the first absorbent body are formed by elastic bodies arranged in the longitudinal direction along both side edges of the diaper body, Elastic members arranged in the longitudinal direction on both sides of the second absorber are located inside the gather portion.

Then, both sides of the second absorbent body are placed inside the three-dimensional gathers on both side edges of the first absorbent body, which are respectively erected by elastic bodies arranged in the lengthwise direction along both side edges of the diaper body. Since the elastic body arranged in the longitudinal direction is located in the part,
Liquid leakage is reliably prevented.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the disposable diaper of the present invention will be described with reference to FIGS.

In FIGS. 1 and 2, reference numeral 1 denotes a diaper body, and the diaper body 1 is composed of a liquid permeable front sheet 2 and a liquid impermeable back sheet 3 on a back waistline portion 4 and leg portions on both sides. The crotch portion 6 and the abdominal waist portion 7 having the number 5 are sequentially and integrally formed in the longitudinal direction so as to be bilaterally symmetrical, and the peripheral edges of the liquid permeable top sheet 2 and the liquid impermeable back sheet 3 are bonded or The first absorbent body 8 is symmetrically disposed between the liquid-permeable topsheet 2 and the liquid-impermeable backsheet 3 which are joined together by fusing or the like.

The liquid-permeable top sheet 2 is formed of a liquid-permeable woven fabric, non-woven fabric, porous film, synthetic resin fiber or the like, and the liquid-impermeable back sheet 3 is impermeable to liquid. It is formed of a resin film such as polyethylene resin.

The crotch portion 6 of the diaper body 1
The leg-surrounding portions 5 formed on both sides of the are formed into concave arc-shaped edges cut out in a substantially concave arc shape, and between the liquid-permeable topsheet 2 and the liquid-impermeable backsheet 3 along the concave arc-shaped edges. The leg gather portion 10 is formed by arranging one or a plurality of elastic bodies 9 such as rubber which are joined in an expanded state.

Further, liquid-impervious surface sheets 11 made of polypropylene resin fibers or the like are polymerized on both sides of the liquid-permeable surface sheet 2 of the diaper body 1 in the width direction, and the liquid-impermeable left and right liquid impermeable sheets 11 are polymerized. The permeable surface sheet 11 is bonded to the peripheral edge of the diaper body 1 by adhesion or fusion, and the inner side edges 12 of the left and right liquid impermeable surface sheets 11 facing each other in the longitudinal direction are separated from the liquid permeable surface sheet 2. One or more elastic bodies 13 such as rubber are attached along the inner edges 12 of the left and right liquid-impervious surface sheets 11, and three-dimensional gathers 14 are formed on both sides of the diaper body 1. Has been done.
The elastic body 13 is attached to the left and right impermeable surface sheets 11 in a stretched state.

Further, on both sides of the back waistline portion 4 of the left and right liquid impermeable topsheets 11 formed on the diaper body 1, the liquid impermeable liquid of the ventral waistline portion 7 of the diaper body 1 is provided. Surface fasteners 15 that are detachably coupled to surface fasteners (not shown) provided on both sides of the elastic back sheet 3 are provided.

Next, the first absorbent body 8 of the diaper body 1
Is made of a material mainly composed of pulp and containing a high-molecular water-absorbing polymer, and the first absorbent body 8 has a center in the width direction so as to form a longitudinal gap 16 at least in the center portion in the width direction. It is formed by the absorbent member 17 that is elongated along the line and is elongated in the longitudinal direction.

The dimension L ₁ of the gap 16 between the absorber members 17 of the first absorber 8 is the dimension L _{2 in} the width direction of the first absorber 8.
On the other hand, L ₁ / L ₂ = 1/2 to 1/4.

Further, in FIGS. 1 and 2, 20 is a second
The second absorbent body 20 is made of a material containing pulp as a main material and a high-molecular-weight water-absorbing polymer, and the second absorbent body 20 is a rectangle long in the longitudinal direction of the diaper body 1. The shape is formed to be longer in the longitudinal direction and the width direction than the first absorber 8. Further, notch recesses 21 are formed on both side edges of the diaper body 1 in the width direction corresponding to the leg portions 5 on both sides so that the dimension in the width direction is shortened.

Further, the second absorber 20 is sandwiched between a liquid-permeable upper sheet 25 and a liquid-permeable lower sheet 26 whose peripheral edges are sealed by adhesion or fusion. Liquid-permeable upper sheet 25 and liquid-permeable lower sheet that seal the second absorber 20.
The width dimension of 26 in the width direction is longer than the width dimension of the second absorbent body 20 in the width direction, and both side edges of the liquid-permeable upper sheet 25 and the liquid-permeable lower sheet 26 are on both sides of the second absorbent body 20. The shape along the edge and the length in the longitudinal direction are substantially the same as the dimensions in the longitudinal direction of the liquid-permeable topsheet 2 and the liquid-impermeable backsheet 3.

Further, both ends of the elastic body 24 such as one or a plurality of rubbers provided in the notched recesses 21 on both sides formed in the second absorbent body 20 are arranged in the longitudinal direction of the notched recess 21. The elastic body 24 is fixed to both ends of the elastic body 24 in a stretched state, and the stretched state portions of the elastic body 24 disposed in the notch concave portions 21 on both sides of the second absorbent body 20 have the liquid permeability. The upper surface sheet 25 and the liquid-permeable lower surface sheet 26 are bonded to each other by adhesion or fusion.

The second absorbent body 20 is laminated on the first absorbent body 8 of the diaper body 1 so as to correspond to the central portion in the longitudinal direction and the central portion in the width direction of the diaper body 1. Liquid-permeable lower sheet 26 encapsulating the second absorber 20
Is adhered to the surface side of the diaper body 1 at a gap 16 position along the longitudinal direction between both ends in the longitudinal direction and the absorbent member 17 of the first absorbent body 8 along the center line in the width direction of the diaper body 1. Alternatively, they are joined at the joining portions 27 by fusion, and a gap is formed between both side edges of the joining portions 27 and the widthwise central portion of the first absorbent body 8.
A non-coupling portion 28 is formed between the inner edge 8a of 16 and a gap in the thickness direction. Inner edges 8a of the gap 16 along both side edges of the joint portion 27 and the widthwise central portion of the first absorber 8
The width dimension of the left and right non-bonded portions 28 between and is 1 cm or more.

As shown in FIGS. 2 and 3, the liquid-permeable topsheet 2 of the diaper body 1 is notched at a portion corresponding to the gap 16 between the absorber members 17 of the first absorber 8, In the portion corresponding to the gap 16, the liquid impermeable back sheet 3
Is exposed to the front surface side, and the notched edge portion 30 of the liquid permeable top sheet 2 is bonded to the liquid impermeable back sheet 3 by adhesion or fusion. Then, the liquid-permeable lower surface sheet 26 of the second absorbent body 20 is bonded to the liquid-impermeable back surface sheet 3 at a portion corresponding to the gap 16 by a bonding portion 27 such as adhesion or fusion.

As shown in FIG. 4, the liquid-permeable topsheet 2 of the diaper body 1 is the absorbent member of the first absorbent body 8.
In the structure where the part corresponding to the gap 16 between 17 is not cut out,
The liquid-permeable lower surface sheet 26 of the second absorbent body 20 is bonded to the liquid-permeable surface sheet 2 by a bonding portion 27 such as adhesion or fusion.

Further, as shown in FIG. 1, the left and right liquid-impervious surface sheets are formed on both sides of the second absorbent body 20 in the width direction.
It is arranged at an inner position of 11.

Further, as shown in FIG. 2, the diaper body 1
Between the left and right three-dimensional gathers 14 which are formed by elastic bodies 13 which are arranged in a state of being stretched in the lengthwise direction along both side edges of the first absorbent body 8 and are joined to the both side edges of the first absorbent body 8. Elastic bodies 24 arranged in the longitudinal direction on both sides of the second absorber 20.
Are located respectively.

Then, as shown in FIG. 5, when the diaper body 1 is mounted, the first absorbent body 8 is moved by the gap 16 of the absorbent body member 17 in the widthwise direction by the force toward the center of the diaper body 1 in the widthwise direction. Both outer edges of the first absorber 8 are pushed upward and move toward the center in the width direction so as to approach each other, and the first absorber 8 and the second absorber 20 in the gap 16 along the center line in the width direction The second absorbent body is bent from the non-coupling portion 28
20 is designed to be pushed up near the center line in the width direction.

Next, the operation of this embodiment will be described.

Liquid-impervious backsheet 3 of the diaper body 1
With the liquid-permeable topsheet 2 on the skin side, the abdominal waistline 7 of the diaper body 1 is applied to the abdomen, the crotch region 6 is applied to the crotch, and the back waistline region 4 is placed on the back. Both sides of the back waistline portion 4 of the left and right liquid impermeable topsheets 11 on the surface fasteners (not shown) provided on both sides of the liquid impermeable backsheet 3 of the abdominal waistline portion 7 of the diaper body 1. The diaper body 1 is attached in the form of pants by being joined to the surface fastener 15 provided on the section.

In this state, the leg gathers 10 made of the elastic bodies 9 attached to the both leg circumferences 5 along the concave arc-shaped edges of the both side edges of the diaper body 1 are tightly attached to the leg circumferences, and the left and right liquid impermeable parts are impermeable. Opposite longitudinal inner edges of the topsheet 11
12 is separated from the liquid permeable surface sheet 2 by an elastic body 13 arranged along the inner edge 12 of the liquid impermeable surface sheet 11 to form a three-dimensional gather portion 14, and this three-dimensional gather portion 14 is formed. It is closely attached to the skin inside the leg gather part 10.

Further, when the diaper is attached, a force is exerted on the first absorbent body 8 toward the center in the width direction, so that the liquid permeable surface sheet 2 or the liquid impermeable body of the diaper body 1 as shown in FIG. The absorbent backing sheet 3 and the liquid-permeable bottom sheet 26 of the second absorbent body 20 are joined on the center line in the width direction of the diaper body 1, so that the absorbent body member 17 of the first absorbent body 8 is joined. The second absorbent body 20 is pushed up so that the second absorbent body 20 has a corrugated fold, and the second absorbent body 20 and the liquid-permeable topsheet 2 of the diaper body 1 or the liquid-impervious backsheet 3 absorb the second absorbent body. Due to the gap in the thickness direction of the first absorbent body 8 formed in the non-bonded portion 28 between the bonded portion 27 of the body 20 and the liquid permeable lower sheet 26, the liquid flowing into the first absorbent body 8 is prevented. Non-coupling part 28
The liquid is diffused in the width direction, and the liquid can be effectively absorbed by the first absorber 8, and the absorption rate of the liquid is increased.

Further, the liquid-permeable topsheet 2 or the liquid-impermeable backsheet 3 of the diaper body 1 and the liquid-permeable bottom sheet 26 of the second absorbent body 20 are arranged along the center line of the diaper body 1 in the width direction. Since both ends in the longitudinal direction are joined by the joining portions 27, and the non-joining portions 28 are formed on both sides of the intermediate joining portion 27 formed between the joining portions 27 at the both ends. Absorber 8
Moves freely in the inseam area in the width direction, and there is no discomfort in wearing,
The first absorbent body 8 and the second absorbent body 20 are separated from each other in the thickness direction, and the liquid that has flowed into the gap between the first absorbent body 8 is the unbonded portion 28.
The liquid is effectively absorbed by being diffused in the width direction through the liquid, and the liquid absorbing performance is improved in combination with the fact that the first absorbent body 8 has a certain folded portion.

The first absorbent body 8 is divided at least along the center line in the width direction, and the absorbent member 17 has the liquid-permeable lower sheet 26 of the second absorbent body 20 and the liquid-permeable lower sheet 26 of the diaper body 1. Of the first absorbent body 8 and the second absorbent body 2 at the time of wearing the diaper because they do not overlap with the connecting portion 27 between the liquid permeable front surface sheet 2 or the liquid impermeable back surface sheet 3 and the liquid permeable lower surface sheet 26 of the second absorbent body 20. The absorbent body (20) freely moves in the crotch in the width direction, and the user does not feel uncomfortable in wearing, and the wearing feeling of the diaper is improved.

Further, the elastic bodies 24 arranged on both sides of the second absorbent body 20 in the longitudinal direction respectively expand and contract the elastic body 24 to surely form the folds in the second absorbent body 20, and To prevent liquid leakage.

Further, as shown in FIG. 2, a second inner portion is formed inside the three-dimensional gathers 14 on both side edges of the diaper body 1 which are respectively erected by elastic members 13 arranged in the lengthwise direction along the both side edges. Since the elastic bodies 24 arranged in the longitudinal direction are positioned on both sides of the absorbent body 20, liquid leakage flowing to the outside of the second absorbent body 20 is reliably prevented.

In the embodiment shown in FIG. 3, the cut-out edge portion 30 formed by cutting out the liquid-permeable topsheet 2 is provided between the absorbent members 17 of the first absorbent body 8 and the liquid-impermeable backsheet. In the structure in which the liquid permeable lower surface sheet 26 of the second absorbent body 20 is directly bonded to the liquid impermeable back surface sheet 3 by adhesion or fusion, the liquid permeable surface sheet is formed. 2 can be reduced, and in the embodiment shown in FIG. 4, the liquid permeable lower sheet 26 of the second absorbent body 20 and the liquid permeable top sheet 2 of the diaper body 1 are joined by the joining portion 27. With this configuration, the liquid-permeable topsheet 2 can be easily processed and the manufacturability is improved.

Further, in the embodiment shown in FIGS. 1 to 4, the liquid-permeable top sheet 2 or the liquid-impermeable back sheet 3 of the diaper body 1 and the liquid-permeable bottom sheet 26 of the second absorbent body 20 are used. As shown in FIG. 6, the coupling portion 27 with the second absorber is
The liquid-permeable lower surface sheet 26 that seals 20 is provided in the longitudinal direction between the connecting portions 27a at both longitudinal ends and the absorbent member 17 of the first absorbent body 8 along the center line in the width direction of the diaper body 1. A connecting portion 27 that linearly connects the center portions in the width direction between the connecting portions 27a at both ends in the longitudinal direction of the second absorber 20 located in the gap 16 along
Although a substantially E-shaped coupling portion 27 is formed by b and the fold portion is easily formed in a wavy shape, the present invention is not limited to this configuration.

For example, as shown in FIG. 7, the second absorber
Only the connecting portions 27a at both ends in the longitudinal direction of 20 are used as the connecting portions 27, and the portions between the connecting portions 27a at the both ends are used as the non-connecting portions 28.
It is also possible to enhance the floating property of the absorbent body 20 and improve the adhesion to the skin.

Further, as shown in FIG.
A point that intermittently connects the joint portions 27a at both longitudinal end portions of 20 and the center portion in the width direction between the joint portions 27a at both ends at a position corresponding to the longitudinal gap 16 of the first absorbent body 8. The joint portion 27 is formed by a plurality of joint portions 27c in the shape of a circle.
The non-coupling portion 28 is formed between the c and the coupling portion 27c and the coupling portions 27a at both ends, and the liquid flowing into the gap 16 of the first absorber 8 is diffused in the width direction through the non-coupling portion 28. The liquid may be easily absorbed by the liquid.

Further, as shown in FIG. 9, there is a straight line between the joint portions 27a at both ends in the longitudinal direction of the second absorbent body 20 shown in FIG. 6 and the center portion in the width direction between the joint portions 27a at the both ends. It is also possible to form the wavy folds easily by forming the wavy folds by connecting the tie portions 27b that are connected to each other with the plurality of thin wire-like tie portions 27e. Also, a plurality of thin-line-shaped connecting portions 27 that linearly connect the widthwise central portions between the connecting portions 27a at both ends.
It is also possible to form a dotted line in which e is intermittent, and the connecting portion located in the gap 16 along the longitudinal direction between the absorbent body members 17 of the first absorbent body 8 is a non-connecting portion 28 where a fold portion is easily formed. Any structure may be used.

Further, in the embodiment shown in FIGS. 1 to 4, the second absorber 20 has a planar shape, but the present invention is not limited to this configuration, and as shown in FIG. In the absorber 20, a central groove 22 and both-side groove 23 are formed by a concave groove formed on the surface side penetrating in the longitudinal direction along the center line in the width direction or a hole groove penetrating in the thickness direction. When the second absorbent body 20 is easily folded in a wavy shape and the first absorbent body 8 pushes up the second absorbent body 20 by the force toward the center of the diaper body 1 in the width direction when the diaper is worn. In addition, the second absorbent body 20 is configured such that the vicinity of the center line in the width direction is pushed upward by the groove grooves 22 and 23 to the upper side of the skin and is folded into a wavy shape.

Further, as shown in FIG. 11, the longitudinal grooves of the second absorbent body 20 are formed in the groove grooves 22 and 23 by concave grooves or hole grooves which do not penetrate to both ends in the longitudinal direction. The absorber 20 may be configured such that the vicinity of the center line in the width direction is pushed upward by the ridges 22 and 23 to the upper side of the skin so that the absorber 20 is folded into a wavy shape.

Further, as shown in FIG. 12, the grooves 22, 23 formed in the second absorbent body 20 shown in FIG. 11 are formed as intermittent grooves 22 or 23 in the form of intermittent point grooves or holes. The second absorber 20 can also improve the diffusibility of the absorbed liquid in the width direction.

Further, as shown in FIG. 13, with respect to the central groove 22 formed in the second absorbent body 20 shown in FIG. 12, the groove grooves 23 on both sides are longitudinally displaced groove grooves 23, The second absorber 20 can also improve the diffusivity of the absorbed liquid in the width direction.

The line grooves 22 and 23 formed in the second absorbent body 20 are, for example, all hole grooves as shown in FIG. 14, so that the liquid that cannot be completely absorbed by the second absorbent body 20. Passes through the grooves 22 and 23 and is easily absorbed by the first absorber 8 to prevent liquid leakage.

Further, as shown in FIG. 15, all the groove grooves 22 and 23 formed in the second absorbent body 20 are concave grooves so that the liquid absorbed in the second absorbent body 20 has a wide width. Direction is easily diffused and absorbed.

Further, as shown in FIG. 16, the central groove 22 formed in the second absorbent body 20 is a concave groove, and the groove grooves 23 on both sides are formed.
Since the holes are grooved, the liquid absorbed by the second absorber 20 is easily diffused and absorbed in the width direction, and the liquid not completely absorbed by the second absorber 20 is formed by the groove 22, After passing through 23, it is easily absorbed by the first absorber 8 to prevent liquid leakage.

As shown in FIG. 17, the second absorber
The central groove 22 formed in 20 is a hole groove, and the groove 23 on both sides is a concave groove, so that the liquid absorbed in the second absorber 20 is easily diffused and absorbed in the width direction. The liquid that cannot be completely absorbed by the second absorbent body 20 passes through the grooves 22, 23 and is easily absorbed by the first absorbent body 8 to prevent liquid leakage.

The line grooves 22 and 23 of the second absorber 20 may be formed in a single line or a plurality of lines, respectively, and may be appropriately combined with concave grooves or hole grooves.

As shown in FIGS. 10 to 17, by forming the grooves 22 and 23 in the second absorbent body 20, the width of the liquid can be made wider by the grooves 22 and 23 of the second absorbent body 20. The liquid is diffused in the direction and the liquid absorbing effect is enhanced, and the liquid that has passed through the grooves 22 and 23 is easily absorbed by the first absorbent body 8 to prevent liquid leakage.

The first absorbent body 8 can be attached by wearing the diaper.
The force acting toward the center in the width direction causes the second
The absorber 20 of FIG.
By the action of 23, it is pushed up along the center line in the width direction to form a certain wavy fold, and the liquid-permeable topsheet 2 or the liquid-impermeable backsheet 3 of the diaper body 1 is further formed.
At the same time, the liquid permeable lower surface sheet 26 of the second absorbent body 20 is joined on the center line in the width direction of the diaper body 1, so that both sides of the second absorbent body 20 are pushed up by the groove 23. A wavy fold is formed between the liquid-permeable topsheet 2 of the diaper body 1 or the liquid-permeable backsheet 3 and the liquid-permeable bottomsheet 26 of the second absorber 20 together with the joint 27. Due to the gap in the thickness direction of the first absorbent body 8 formed in the non-bonded portion 28, the liquid that has flowed to the first absorbent body 8 is not bonded
The liquid is diffused in the width direction, and the liquid can be effectively absorbed by the first absorber 8, and the absorption rate of the liquid is increased.

Further, in the diaper that has been mounted, the second absorbent body 20 has the plurality of folds formed by the plurality of longitudinal grooves 22 and 23, and the first and second diapers capable of absorbing the liquid near the crotch region. The absorbent surface areas of the absorbent bodies 8 and 20 are expanded and adhere to the crotch region, and the liquid is diffused in the longitudinal direction of the diaper body 1 to prevent liquid leakage.

Further, in the embodiment shown in FIGS. 1 to 4, as shown in FIG. 18, one or a plurality of elastic bodies 24 such as rubber are provided on both sides of the second absorbent body 20. The second absorbent body 20 is disposed in each of the notch recesses 21, and the second absorbent body 20 is provided with elastic bodies 24 arranged on both sides by a force acting on the first absorbent body 8 toward the center in the width direction when the diaper is attached. Although the structure in which the action and the ridge grooves 22 and 23 easily push up along the center line in the width direction to form a certain wavy fold, the structure is not limited to this.

For example, as shown in FIG. 19, one or a plurality of elastic bodies 24a such as rubber are arranged in parallel in the width direction of the second absorber 20 so as to form a second absorber. By attaching the elastic body 24a to the body 20, a large amount of material is used for the elastic body 24a, but wavy foldability is ensured.

As shown in FIG. 20, the second absorber
One or more elastic bodies such as rubber attached to 20 24
Are elastic bodies 24b arranged in parallel in the longitudinal direction at the central portion of the second absorbent body 20 and elastic bodies arranged in parallel in the width direction at plural places.
As 24b, the foldability of the second absorber 0 can be enhanced.

The elastic body 24 provided on the second absorber 20
Is 2 to 8, preferably 2 to 4.

Further, the elastic bodies 24, 24a, 24b, 24c shown in FIGS. 18 to 20 are attached to the second absorbent body 20 in a stretched state.

When the diaper is attached, the second absorbent body 20 is pushed upward by the first absorbent body 8 to the skin side, and a certain wavy fold portion formed on the second absorbent body 20 is In the structure in which one central groove 22 is formed on the second absorbent body 20, the groove 22 has a substantially U shape as shown in FIG. 21 (a).
In the structure in which 23 is formed of two or three threads, it has a substantially W shape as shown in FIG. 21 (b), and when the groove grooves 22 and 23 have four or more threads, as shown in FIG. 21 (c). Both sides of the substantially W-shaped folded portion are folded downward.

When the second absorbent body 20 is not pushed up to the skin side by the first absorbent body 8 due to the wearing of the diaper, the diaper body 1 and the second absorbent body 20 are formed. The constant wavy fold has a substantially inverted U-shape as shown in FIG. 21 (d) in the configuration in which one central groove 22 is formed in the second absorber 20, and the groove 22, 23 is formed. In the configuration in which two or three threads are formed, as shown in FIG. 21 (e), it becomes a substantially inverted W shape, and when there are four or more groove grooves 22, 23, as shown in FIG. 21 (f). Both sides of the substantially inverted W-shaped fold are folded upward.

[0075]

EXAMPLE In the embodiment shown in FIGS. 1 to 4, the widthwise dimension of the absorbent member 17 of the first absorbent body 8 is 10 mm.
mm to 150 mm, preferably 50 mm to 100 mm, and the longitudinal dimension is approximately the same as the longitudinal dimension of the second absorbent body 20 or slightly shorter than the longitudinal dimension of the second absorbent body 20. .

Further, the liquid-permeable surface sheet 2 of the diaper body 1
Alternatively, the dimension of the non-bonding portion 28 between the bonding portions 27 of the liquid-impermeable back sheet 3 and the liquid-permeable lower sheet 26 of the second absorber 20 is 20
The length is not less than mm and not more than the total length of the second absorber 20 in the longitudinal direction, preferably 50 mm to 200 mm.

The dimension of the joint portion 27 of the second absorbent body 20 in the width direction is 1 mm or more and is less than or equal to the width dimension of the gap 16 of the first absorbent body 8 in the crotch portion 6 between the both leg leg portions 5. age,
It is preferably 20 mm to 80 mm.

Further, the inner peripheral surface of the absorbent member 17 in the gap 16 between the first absorbent body 8 and the connecting portion 27 between the second absorbent body 20 and the liquid-permeable topsheet 2 or the liquid-impermeable backsheet 3. The gap between and is 5 mm to 100 mm, preferably 10 mm to 50 mm.

Furthermore, the grooves 22, 23 of the second absorber 20 are
Or 12 places.

[0080]

According to the invention of claim 1, the liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the second
The second absorbent body is bonded to the skin without being affected by the first absorbent body of the diaper body because the liquid-permeable lower sheet of the absorbent body is bonded to the second absorbent body by the groove of the second absorbent body. , A constant fold is always formed, and the liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorber are placed on the center line in the width direction of the diaper body. Since the folds are joined together, the folds are easily formed, the liquid diffuses in the longitudinal direction, the absorption function is improved, and the fitting property is improved.

According to the second aspect of the present invention, the non-bonding portion between the liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body. By the gap in the thickness direction of the first absorbent body formed in, the liquid flowing into the first absorbent body is diffused in the width direction from the non-bonding portion, and the liquid is effectively absorbed by the first absorbent body, The absorption rate of liquid is increased. Further, the non-bonding portion between the liquid-permeable top sheet or the liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body causes the first absorbent body to have a width in the crotch region. It can move freely in any direction and can be installed well without any discomfort.

According to the third aspect of the present invention, the first absorbent member is divided at least along the center line in the width direction, and the absorbent member is the liquid-permeable lower sheet of the second absorbent member and the diaper body. Since the liquid-permeable top sheet or the liquid-impermeable back sheet and the liquid-permeable bottom sheet of the second absorbent body do not overlap with each other, the widths of the first and second absorbent bodies in the crotch are increased when the diaper is worn. It can move freely in any direction, and there is no discomfort when it is worn, and the diaper can be worn comfortably. The liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorber are joined at both longitudinal ends along the widthwise center line of the diaper body. Since the intermediate portion of the coupling portion is the non-binding portion, the first absorbent body and the second absorbent body are separated from each other in the thickness direction, and the liquid flowing into the gap of the first absorbent body passes through the non-bonding portion. The liquid is diffused in the width direction to effectively absorb the liquid, and the constant groove is always formed by the groove of the second absorber, so that the liquid absorbing performance is improved.

According to the fourth aspect of the present invention, when the diaper is worn, the absorbent body member of the first absorbent body has both outer edges in the width direction inclined upwards toward the skin side and centered in the width direction. Toward the skin, the second absorber is pushed up to the skin side, and the folds are formed in a wavy shape and both sides stand up to improve the adhesiveness with the skin and prevent liquid leakage. It

According to the fifth aspect of the present invention, the first absorbent member is divided at least along the center line in the width direction, and the absorbent member is the liquid-permeable lower sheet of the second absorbent member and the diaper body. Since the liquid-permeable top sheet or the liquid-impermeable back sheet and the liquid-permeable bottom sheet of the second absorbent body do not overlap with each other, the widths of the first and second absorbent bodies in the crotch are increased when the diaper is worn. It can move freely in any direction, and there is no discomfort when it is worn, and the diaper can be worn comfortably.

According to the sixth aspect of the present invention, the worn diaper has the plurality of folds formed in the second absorbent body, and the absorbent surface area of the absorbent body capable of absorbing liquid is increased in the vicinity of the crotch region.
Moreover, the liquid adheres to the crotch region, and the liquid diffuses in the longitudinal direction of the diaper body to prevent liquid leakage.

According to the seventh aspect of the present invention, the elastic body expands and contracts to surely form the fold in the second absorbent body, so that the second absorbent body is in close contact with the skin and liquid leakage is prevented.

According to the eighth aspect of the present invention, when the diaper is worn, the first absorbent body pushes up the vicinity of the widthwise center of the second absorbent body by the force toward the widthwise center.
A convex fold is formed to improve the adhesion to the skin and prevent liquid leakage.

According to the ninth aspect of the invention, the inner side of the three-dimensional gather portion on the both side edges of the first absorbent body is erected by the elastic bodies arranged in the longitudinal direction along the both side edges of the diaper body. Since the elastic bodies arranged in the longitudinal direction are located on both sides of the second absorber, liquid leakage can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a developed plan view of a disposable diaper showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional explanatory view with a part cut away.

FIG. 3 is a front view of a joint portion between the liquid-permeable lower sheet and the liquid-impermeable back sheet of the second absorbent body.

FIG. 4 is a front view of a connecting portion between the liquid-permeable lower sheet and the liquid-permeable top sheet of the second absorbent body of the disposable diaper showing another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional explanatory view showing a folded state of the disposable diaper showing the embodiment of the present invention.

FIG. 6 is a second disposable diaper according to an embodiment of the present invention.
FIG. 6 is a plan view of a second absorbent body showing a joint portion between the liquid-permeable lower sheet and the liquid-permeable top sheet of the absorbent body of FIG.

FIG. 7 is a plan view of a second absorbent body showing a joining portion between the liquid-permeable lower surface sheet and the liquid-permeable top sheet of the second absorbent body of the disposable diaper of another embodiment of the present invention.

FIG. 8 is a plan view of a second absorbent body showing a joint portion between the liquid-permeable lower surface sheet and the liquid-permeable top sheet of the second absorbent body of the disposable diaper of another embodiment of the present invention.

FIG. 9 is a plan view of a second absorbent body showing a joint portion between the liquid-permeable lower surface sheet and the liquid-permeable top sheet of the second absorbent body of the disposable diaper of another embodiment of the present invention.

FIG. 10 is a plan view of a second absorbent core showing a groove formed in the second absorbent core of the disposable diaper according to another embodiment of the present invention.

FIG. 11 is a plan view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper according to another embodiment of the present invention.

FIG. 12 is a plan view of a second absorbent core showing a groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 13 is a plan view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 14 is a vertical cross-sectional front view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 15 is a vertical cross-sectional front view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 16 is a vertical cross-sectional front view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 17 is a vertical cross-sectional front view of the second absorbent core showing the groove formed in the second absorbent core of the disposable diaper of another embodiment of the present invention.

FIG. 18 is a plan view of the second absorbent body showing the elastic body arranged in the second absorbent body of the disposable diaper of the embodiment of the present invention.

FIG. 19 is a plan view of a second absorbent body showing an elastic body arranged in the second absorbent body of the disposable diaper of another embodiment of the present invention.

FIG. 20 is a plan view of a second absorbent body showing an elastic body arranged in the second absorbent body of the disposable diaper of another embodiment of the present invention.

FIG. 21 (a), (b), (c), (d), (e), (f) is an explanatory front view showing a folding mode of the second absorbent body of the disposable diaper of the present invention.

[Explanation of symbols] 1 diaper body 2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Dorsal waist area 5 leg parts 6 inseam 7 Ventral waist area 8 First absorber 14 Three-dimensional gather section 17 Absorber member 20 Second absorber 22 groove 23 groove 24 elastic body 25 Liquid-permeable top sheet 26 Liquid-permeable bottom sheet 27 Join 28 Non-joined part

Continuation of front page (56) References JP-A-9-192169 (JP, A) JP-A-6-78951 (JP, A) JP-A-2-60646 (JP, A) JP-A-61-238239 (JP , A) JP-A-3-267059 (JP, A) Actually developed 55-127712 (JP, U) Actually developed 4-47428 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) A61F 13/15-13/84

Claims (9)

(57) [Claims] 1. A liquid-permeable top sheet and a liquid-impermeable back sheet are integrally formed in a longitudinal direction in a dorsal waist region, a crotch region having leg regions on both sides, and an abdominal region around the waist region. Of the diaper body having a symmetrical shape, which is formed on the liquid-permeable top sheet and the first absorbent body between the liquid-permeable top sheet and the liquid-impermeable back sheet, and the liquid-permeable top sheet and the liquid-permeable bottom sheet. A second absorbent body that is sandwiched between the first absorbent body and a second absorbent body that is laminated in correspondence with a central portion in the longitudinal direction and a central portion in the widthwise direction of the first absorbent body, wherein the first absorbent body has a central portion in the widthwise direction. And a liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and a liquid-permeable bottom sheet of the second absorbent body, the first absorption of the diaper body. It is characterized in that it is connected on the center line in the width direction from the gap in the center in the width direction formed on the body. Discarded diapers. 2. The liquid-permeable front sheet or liquid-impermeable back sheet of the diaper body and the liquid-permeable lower sheet of the second absorbent body, both side edges of a connecting portion along the center in the width direction, and the first portion. 2. The disposable diaper according to claim 1, further comprising a non-bonding portion that forms a gap in the thickness direction between the absorbent core and the inner edge of the gap along the center in the width direction. 3. The connecting portion for connecting the liquid-permeable top sheet or liquid-impermeable back sheet of the diaper body and the liquid-permeable bottom sheet of the second absorbent body is along the center line in the width direction of the diaper body. The disposable diaper according to claim 1, wherein the disposable diaper is formed at both ends in the longitudinal direction, and an intermediate portion of the both end joining portions is a non-joining portion. 4. The absorber member of the first absorber is tilted by pushing the outer edge in the width direction upward by a force toward the center in the width direction when the diaper body is attached, and the absorber member is The first absorber and the second absorber are moved upward in the direction toward each other toward the center portion in the width direction to push the second absorber upward.
The disposable diaper according to any one of claims 1 to 3, wherein a fold portion is formed in a wavy shape with the absorbent body. 5. The first absorbent body of the diaper body is formed of absorbent members divided at least along a center line in the width direction, and is arranged between the absorbent members of the first absorbent body in the longitudinal direction. The disposable diaper according to any one of claims 1 to 4, wherein a gap is formed at a central portion in the width direction. 6. The second absorbent body according to claim 1, wherein a plurality of linear grooves which are continuous or intermittent in the longitudinal direction are formed between both side edges in the width direction. Disposable diaper. 7. An elastic body is arranged in the longitudinal direction between the liquid-permeable upper sheet and the liquid-permeable lower sheet, which are located on both sides of the second absorbent body, and are coupled to each other. The disposable diaper according to any one of claims 1 to 6. 8. The disposable diaper according to claim 6, wherein the second absorber forms a fold portion by a longitudinal groove when the diaper main body is attached to the diaper body. 9. A three-dimensional gather part standing upright on both side edges of the first absorbent body is formed by elastic bodies arranged in the longitudinal direction along both side edges of the diaper body, and a three-dimensional gather part is formed inside the three-dimensional gather part. 9. The disposable diaper according to claim 7, wherein elastic bodies arranged in the longitudinal direction are respectively positioned on both sides of the second absorbent body.