JP3591555B2 - Diapers - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disposable diaper to be used for infants or incontinent persons, and to a disposable diaper effective for preventing leakage.
[0002]
[Prior art]
Disposable diapers have a structure in which a hydrophilic sheet, a cotton-like pulp, a high-water-absorbing polymer material, and other absorbent material are arranged between a liquid-permeable top sheet and a liquid-impermeable back sheet. I have. 2. Description of the Related Art In recent years, since the use of a superabsorbent polymer material in an absorbent article for a disposable diaper, a great effect has been achieved against leakage and reversion of urine and loose stool. However, since the superabsorbent polymer substance has an extremely slow urine absorption rate as compared with the cotton-like pulp, there is a possibility that a large amount of urine, loose stool, or the like is leaked out temporarily. For this reason, measures have been required to prevent leakage of a large amount of urine and loose stool.
[0003]
In order to solve these points, it has been proposed to place a flap outside the absorber. That is, as described in Japanese Patent Publication No. Hei 6-93901, a flap having a side flap containing a stretchable elastic member and functioning as a leak-proof portion includes a stretchable elastic member, and is folded inside a diaper. 2. Description of the Related Art A diaper that is installed and has a pocket portion formed between the diaper and a topsheet on an absorber to prevent leakage has been known.
[0004]
In addition, a three-dimensional gather is provided along the longitudinal side edge of the absorber at a position between the leg-around gathers and the absorber or on the absorber, and stands upright toward the wearer's body, Pants-type disposable diapers composed of a separate sheet from the top sheet and the back sheet are disclosed in JP-A-3-280951 and JP-A-5-184622.
Further, a diaper in which a top sheet member formed by joining a central nonwoven fabric and water-repellent side nonwoven fabrics on both sides wraps the absorber in the width direction and two dimensional cuffs are formed in the water-repellent side nonwoven fabric portion is disclosed in It is disclosed in JP-A-6-296638.
[0005]
[Problems to be solved by the invention]
The diaper described in the above-mentioned Japanese Patent Publication No. Hei 6-93901 is simple in that the flap simply falls down on the inside of the absorber, and the flap does not stand on the absorber side when worn. In some cases, the function of the leak-proof wall cannot be fulfilled. In addition, even if it is lucky, it stands up slightly in the inward direction, so the capacity of the pocket part is reduced, and when a large amount of urine is excreted, it is not possible to temporarily secure urine. In addition, it will leak to the outside of the diaper. In addition, when the flap width is increased to increase the capacity, the area where the flap covers the absorber increases, and there is a problem that the absorption region becomes extremely narrow.
[0006]
The pants-type disposable diapers described in JP-A-3-280951 and JP-A-6-63074 are provided with a top sheet and a back sheet in order to prevent excretion from leaking from leg openings. Forms a three-dimensional gather with a separate sheet, but absorbs the elongate strip-shaped sheet on which the elastic members constituting the three-dimensional gather are stretched in a direction substantially perpendicular to the elastic members provided at the waist opening, and The arrangement on the side edge in the longitudinal direction over the entire body length complicates the diaper processing step and the configuration of the diaper, making it difficult to perform high-speed production. Also, in the case of the diaper described in Japanese Patent Application Laid-Open No. 6-296638, the top sheet member is composed of three materials of the center and both sides, and two three-dimensional cuffs are formed on both sides of the top sheet. Therefore, the diaper processing step and the configuration of the diaper become complicated, and it becomes difficult to provide an inexpensive diaper.
[0007]
In addition, since the three-dimensional gathers consist only of the band-shaped sheet and the elastic member, the excrement does not pass over the three-dimensional gathers or oozes out, so that the prevention of leakage is incomplete.
As described above, a disposable diaper having an effective three-dimensional gather that has a sufficient effect of preventing leakage has not been proposed so far.
The present invention overcomes the above problems of the conventional disposable diaper, increases the capacity of the pocket structure formed by the three-dimensional gathers to prevent excretion from leaking, and furthermore, raises a part of the side edge of the absorber. It is an object of the present invention to provide a disposable diaper in which the feeling of wearing the crotch is improved by raising the diaper.
[0008]
[Means for Solving the Problems]
The disposable diaper according to the present invention is characterized in that one side edge in the longitudinal direction of the flap sheet is a free edge provided with a stretchable elastic member in an extended state on the upper surface of the absorber, and the other side edge is a back sheet at the lower surface portion of the absorber. The above-mentioned object was achieved by forming a three-dimensional gather that was adhered and fixed to the upper surface of the absorber and stood upward together with the side edge of the absorber, using the lower surface of the absorber as a base end.
[0009]
That is, the disposable diaper of the present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber interposed between these sheets, and an outer side from both lateral edges of the absorber. In a disposable diaper having side flaps extending to the side and three-dimensional gathers formed near both side edges of the absorber,
The side flap is formed by a portion of the back sheet extending outward from both lateral edges of the absorber and a side sheet laminated thereon, and further forms a back sheet and a side sheet constituting a side flap Between the stretch elastic members are arranged in an extended state,
The three-dimensional gather is formed by a flap sheet arranged from the lower surface to the upper surface of the absorber so as to wrap both side edges of the absorber,
In the flap sheet, a portion located on the lower surface of the absorber is adhesively fixed to the back sheet, and a portion located on the upper surface of the absorber is provided with a stretchable elastic member extended in a side edge along a longitudinal direction. Both ends in the longitudinal direction are adhesively fixed to the top sheet on the absorber, and the side edges of the crotch region are free edges separated from the top sheet surface on the absorber, so that in the crotch region when worn, A disposable diaper characterized in that the lower part of the absorbent body stands upright together with a side edge of the absorbent body, with a portion adhered and fixed to a back sheet at a base end.
[0010]
In addition, the present invention relates to the disposable diaper, wherein the three-dimensional gathers are formed by a flap sheet covering the entire lower surface of the absorber.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
In the disposable diaper of the present invention having the above configuration, the three-dimensional gathers formed near both side edges of the absorber are flaps arranged from the upper surface to the lower surface of the absorber so as to wrap the side edges of the absorber. A flap sheet, one side edge of which is adhered and fixed to the back sheet at a lower surface portion of the absorber, and a stretchable elastic member disposed in an extended state at an upper surface portion of the absorber; With the other side edge having a free edge formed apart from the base, the portion adhered and fixed to the back sheet on the lower surface of the absorber is absorbed by the contraction force of the elastic member attached to the free edge as the base end. It stands up with the side edge of the body, and the side edge of the absorber acts as a part of three-dimensional gathers, making it an excellent structure that is effective in preventing leakage and improving the feeling of wearing That.
[0012]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the drawings showing examples of the present invention, but the present invention is not limited to these examples.
FIG. 1 is a perspective view of a disposable diaper of the present invention in which a side seam is adhesively closed to form a three-dimensional pants type in advance.
The pants-type disposable diaper 1 shown in FIG. 1 has a waist opening 2, a leg opening 3, a crotch, and a front body 5 and a back body 6 arranged with the crotch therebetween. A stretchable elastic member is attached to the portion 2 and the leg opening 3 along both openings. The front body 5 and the back body 6 are adhesively closed by side seams 7.
[0013]
The adhesive closure of the side seam 7 is such that the front body 5 and the back body 6 are overlapped via the crotch so that the absorber 9 is on the inside, and the side edges are protruded outward, or both side edges are protruded inward. In the state, or with one side edge outside and the other side edge protruding inside, hot melt adhesive, pressure melting, ultrasonic melting etc. alone or in combination along the outermost of both sides This is done by joining.
[0014]
At the time of wearing, the pants type diaper is pulled up through both legs through the waist opening 2 and the legs are worn through each leg opening 3. During the wearing, gathers are formed in the waist opening 2 and the leg opening 3 of the diaper, so that the fitting to the wearer, the followability, and the leakage prevention are achieved.
In addition, one side edge of the flap sheet 18 disposed so as to wrap both lateral edges of the absorber is adhered and fixed to the back sheet 10 on the lower surface of the absorber 9, so that the lower surface of the absorber is based on the lower surface. The end portion 15 is formed with a three-dimensional gather 11 that rises up with the side edge of the absorber 9 to prevent excrement and the like from leaking from the absorber (see FIG. 4). It is rather preferable that the both side edges in the width direction of the absorber 9 be in a non-joined state because the absorber has good adhesion and followability to the body when worn. Further, since the double gathers are formed together with the gathers at the opening around the leg, reliable prevention of leakage from the leg is achieved.
[0015]
FIG. 2 is a perspective view showing a case in which the side seam 7 of the pants-type disposable diaper 1 of the present invention shown in FIG. 1 is opened and the elastic member is in a free state, and FIG. It is a perspective view in the state where the elastic elastic member of the used diaper shown was expanded. In FIG. 2, both sides joined by the side seam 7 when mounted in the state of FIG. 1 are shown as edges of the side flap portion 4 by being opened and unfolded, and are provided at the opening around the left and right legs. A stretchable elastic member 13 is provided along.
[0016]
FIG. 3 shows a view in which the waist gathers are formed from an elastic ribbon 16 separate from the liquid impermeable backsheet 10. In this case, the elastic ribbon 16 is attached so as to sandwich the liquid-impermeable backsheet 10 around the waist at the portion of the sandwiching joint region 17.
FIG. 3 shows an example of the waist gather formed by the elastic ribbon 16 separate from the liquid impermeable back sheet 10, but the waist gather is an extension of the sheet constituting the liquid impermeable back sheet 10. May be formed. FIG. 3 shows an example in which the waist gathers are arranged all around the waist. However, it is not always necessary to arrange them around the waist, and the gathers are arranged so that the diaper fits the waist. It should just be.
[0017]
FIG. 4 is a cross-sectional view taken along the line AA 'in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line BB' in FIG.
In FIG. 4, the flap sheet 18 extends from the lower surface of the absorber 9 to the outside of both lateral edges of the absorber 9, and the side edge located on the lower surface of the absorber 9 is attached to the back sheet 10 by the adhesive 21. The flap sheet 18 is fixed by bonding, and the flap elastic member 14 is provided on the free edge of the flap sheet 18 in an extended state.
Further, between the side sheet 20 and the back sheet 10 that constitute the side flap portion 4, an elastic member 13 around the leg opening is disposed.
[0018]
As shown in FIG. 4, in a state where the elastic member 14 is in the free state, which is the same state as when the diaper is worn, the flap sheet 18 is gathered and the lower surface of the absorber together with the side edge of the absorber 9 is raised upward as the base end 15. A three-dimensional gather 11 that rises and blocks excrement to prevent leakage is formed.
[0019]
FIG. 5 shows a region 19 in the longitudinal direction end portion of the flap sheet 18, in which the flap sheet 18 is in a state of being fallen on the top sheet 8 without rising upward.
FIG. 5 shows an example in which the flap elastic member 14 is arranged at the free edge of the flap sheet 18. However, it is not always necessary to arrange the flap elastic member 14 in the region of both ends 19. In this case, since both ends 19 in the longitudinal direction of the flap sheet 18 present on the upper surface of the absorber are covered so as to be sandwiched by the elastic ribbon 16, the fitting property around the elastic ribbon in close contact with the wearer becomes good, and the three-dimensional gathers are reduced. Even if the constituent materials are overlaid to form a convex portion or the texture is hardened, the skin is in contact with the continuous band-shaped sheet in the width direction, so that it does not cause discomfort to the wearer. There is.
[0020]
FIG. 6 is a cross-sectional view taken along line AA ′ of FIG. 2 showing another embodiment different from FIG. 4 in which the flap sheet 18 covers the entire lower surface of the absorber 9. In FIG. 4, the pair of three-dimensional gathers 11 is formed by two flap sheets 18 arranged on both side edges of the absorber 9, but as shown in FIG. May be constituted by a single flap sheet 18 covering the flap.
[0021]
FIG. 7 is an embodiment in which the shape of the absorber 9 is different from that of FIG. 3, and FIG. 8 is a cross-sectional view taken along the line CC 'of FIG. The shape of the absorber 9 has an hourglass shape, a T-shape, or the like in which the crotch portion is narrowed in order to obtain a good fit. However, as shown in FIG. In the narrow region, the flap sheet 18 rises upward in the portion where the absorber does not exist, and forms the pocket gathers 11 having a larger pocket structure.
[0022]
As the liquid-permeable topsheet 8 used in the present invention, a liquid-permeable nonwoven fabric, woven fabric, porous plastic film, porous foam, reticulated foam, or the like made of polyethylene, polypropylene, polyester, or the like is used. Further, natural fibers (for example, wood fibers, flocculent fibers, etc.) may be used, and they can be produced from a wide range of materials such as a combination of synthetic fibers and natural fibers. In any case, since the top sheet 1 is a portion that comes into direct contact with the skin, any material that is soft and has a good touch can be used.
[0023]
In the present invention, the absorbent body 9 is mainly composed of cotton-like pulp, a highly water-absorbing polymer substance, but is not particularly limited, and may be a water-absorbing sponge, a water-absorbing sheet, or the like. What is necessary is just to have the property of water absorption. The cotton-like pulp in the present invention is a chemical pulp, a mechanical pulp, or a sheet of a chemical-mechanical pulp made into a floc with a crusher. The pulp raw material is not limited to softwoods, but broadleaf trees, straws, bamboos, bagasses and the like are also applicable. In addition, synthetic fibers, heat-sealing components, adhesives and the like may be contained together with the cotton-like pulp. In addition, a single absorbent paper or a mixture or a laminate of heat-fused fibers is used.
[0024]
Highly water-absorbing polymer substances, such as starch polymers, acrylic acid polymers, and cellulosic substances, which absorb water at least 50 times their own weight, and polyacrylic acid substances such as sodium polyacrylate Is most suitable in terms of absorption performance. Also, the shape is not particularly limited, such as a fibrous shape, a granular shape, and a sheet shape. In the absorber, the superabsorbent polymer substance may be mixed with the cotton-like pulp, or may be dispersed in a layer between the cotton-like pulp, or both.
[0025]
The shape of the absorber 9 is not particularly limited, such as an hourglass shape, a rectangular shape, and a T-shape, and may be any shape as long as it fits inseam. Generally, in order to improve the wearing feeling, there are shapes such as an hourglass type and a T-shaped type in which the crotch is narrowed. However, as the width of the absorber is reduced, the capacity of the absorber decreases, which leads to leakage. . In the present invention, since the three-dimensional gathers have a base end on the lower surface of the absorber, the side edges of the absorbers stand together with the three-dimensional gathers, so that the three-dimensional gathers can easily follow the movement of the wearer. For this reason, it is possible to improve the feeling of wearing without reducing the capacity of the absorber, so that the feeling of wearing can be improved. Further, since the side edge of the absorber acts as a part of the three-dimensional gather, leakage can be more effectively prevented.
Further, the absorber 9 may be wrapped by a hydrophilic sheet, or a hydrophilic sheet may be sandwiched in the absorber 9. As the hydrophilic sheet, for example, a hydrophilic sheet such as water-absorbing paper or hydrophilic nonwoven fabric is used.
[0026]
In the present invention, the elastic members such as the flap elastic member 14, the leg elastic member 13 around the leg, the elastic member 12 around the waist and the like arranged on the free edge of the three-dimensional gather 11 are made of an elastomer film, a polyurethane film, Elastomer foam, polyurethane foam, natural thread rubber, urethane thread rubber, flat rubber, heat-shrinkable film, and the like are used, but are not particularly limited as long as they are elastic materials. In addition, these elastic members are disposed in a stretched state in the three-dimensional gather portion, the leg opening, and the waist opening, and are adhesively fixed. As a method of bonding and fixing, a method using a hot melt adhesive, a heat seal welding method, an ultrasonic welding method, or the like is used alone or in combination, but any method that does not peel off even when wet with urine or the like may be used.
[0027]
In the present invention, the three-dimensional gather 11 has a base end portion 15 located on the lower surface of the absorber, and a free edge located on the upper surface of the absorber opposite to the base end portion 15 and separated from the upper surface of the absorber. The free edge is formed in a bag shape by bending a side edge portion of the flap sheet 18 so as to wrap the elastic elastic body 14 inside. The flap elastic member 14 is not particularly limited as long as it is an elastic material, but may be the same as or different from the leg opening elastic member 13 disposed on the side flap 4. In addition, one or several pieces may be arranged, and it is preferable that the three-dimensional gathers 11 are not installed at least at the top of the bag. In any case, it is only necessary that the flap elastic member 14 is arranged so that the three-dimensional gather 11 can stand upright.
[0028]
It is preferable that the flap elastic members 14 are not disposed at both ends 19 in the longitudinal direction of the free edge of the three-dimensional gather. In addition, since both ends 19 in the longitudinal direction of the free edge are portions where the abdomen and the back directly contact, it is preferable that the three-dimensional gathers 11 do not stand. If the three-dimensional gathers 11 stand in the abdomen and the back region, the feeling of wearing is improved. Extremely bad.
Further, the folded width of the side edge portion of the flap sheet 18 forming the free edge may be a width capable of wrapping the elastic elastic body 14 installed therein, and the entire three-dimensional gather 11 is doubled. Sheet. If the entire three-dimensional gather 11 is formed of a double sheet, the leakage prevention is improved, and the leakage is more effective.
[0029]
In addition, as shown in FIGS. 2 and 4, the three-dimensional gather 11 is separated from the base end 15 by the contraction force of the flap elastic member 14 attached to the free edge, as shown in FIGS. Since it rises up with both side edges of the absorber, a pocket structure having a larger capacity can be formed than when the three-dimensional gathers 11 are simply turned inward, and a tremendous effect in preventing leakage can be achieved.
[0030]
The base end 15 of the three-dimensional gather is suitably located on the absorber side edge of the lower surface of the absorber 9 and on the back sheet 10 between the inner side and 6 cm from the side edge. If the base end portion 15 is outside the side edge of the absorber 9, a portion where the absorber 9 does not exist at all will be present in the pocket structure formed by the three-dimensional gather 11, so that a large amount of urine excreted When loose stool accumulates in the three-dimensional gather 11 and flows into the absorbent body 9 along the wall of the three-dimensional gather 11, urine and loose stool cannot be absorbed in the part where the absorbent body 9 does not exist, and urine and the like are pooled in that part. At this time, if the child wearing the disposable diaper moves even a little, leakage will occur. Conversely, if the base end 15 is located at a position 6 cm or more inward from the side edge of the absorber, the rise of the absorber itself is increased, and the feeling of wearing is significantly deteriorated. Further, even if the base end portion 15 is inside the side edge portion of the absorber 9 within 6 cm, if it is on the absorber, the portion where the three-dimensional gather covers the absorber increases, and the urine absorption region Becomes narrower, which makes it easier to leak.
[0031]
The width of the three-dimensional gathers 11 is 1 cm to 7 cm, preferably 3 cm to 5 cm. If the width of the three-dimensional gathers 11 is less than 1 cm, the standing height of the three-dimensional gathers 11 becomes too low, and the leakproofness is impaired. On the other hand, if it exceeds 7 cm, the standing height of the three-dimensional gathers 11 becomes too high, and the three-dimensional gathers may bend when the diaper is worn, or may be pinched between the gathers around the leg and the wearer's skin. And even a small amount of urine will leak.
[0032]
The flap sheet 18 used to form the three-dimensional gathers is preferably leakproof, and is preferably, for example, a water-repellent nonwoven fabric, a nonwoven fabric formed of ultrafine fibers, a nonwoven fabric bonded to a film, or the like. When the flap sheet 18 is configured as a liquid-permeable sheet, it has air permeability, so that it does not get stuffy while wearing the diaper and does not give any discomfort to the wearer. When the flap sheet 18 is formed of a liquid impermeable sheet, it is effective against leakage.
[0033]
The liquid-impermeable back sheet 10 used in the present invention is a liquid-impermeable film such as polyethylene, a material formed by laminating a non-woven fabric, a woven fabric, or the like to a liquid-impermeable film, or a leak-proof non-woven fabric, It is made of a woven fabric or the like, and is not particularly limited, and any material may be used as long as the moisture in the absorbent does not seep outside the diaper. In addition, it may be embossed in a pattern to give a cloth-like appearance, or may have a matte finish. Furthermore, when a film is used, a known air-permeable film that is permeable to water vapor while being liquid-impermeable may be used, and is more preferable because it prevents stuffiness.
[0034]
In the present invention, the side flap portion 4 is formed of a back sheet 10 portion extending outward from both side edges of the absorber 9 and a side sheet 20 laminated thereon. The leg opening elastic member 13 is provided in the surrounding opening 3 between the back sheet 10 and the side sheet 20 in an extended state. At this time, the leg-opening elastic member 13 is disposed at least at the crotch portion of the diaper. However, gathers are provided around the entire circumference of the leg to improve fit, prevent leakage, and so on. Preferably it is present. The leg-opening elastic member 13 is made of one elastic body or several elastic bodies arranged in parallel or non-parallel with each other, and can be arranged linearly or curvedly. However, in order to improve the fit with the crotch portion, it is desirable that the curved portion is disposed along the opening around the leg.
[0035]
The side sheet 20 of the present invention may be the same material as the top sheet 8 or a different material. However, it is preferable that the side sheet 20 is water repellent so that urine and the like do not seep out from the leg opening 3. preferable.
Further, in the present invention, in order to improve the fit of the diaper to the wearer, the back sheet or the side sheet 20 is provided with elasticity by using a material having elasticity. You may. Examples of the stretchable material include a liquid-impermeable elastomeric nonwoven web having stretch elasticity, or a polyester fiber such as polyethylene terephthalate fiber, a polyolefin fiber, or a nylon fiber such as nylon fiber on at least one surface of the elastomeric nonwoven web. And a web in which a fiber layer formed from a material selected from cellulose fibers such as cotton fibers, pulp fibers, and mixtures thereof is hydroentangled or laminated. Furthermore, a web in which a fiber layer is hydroentangled or laminated on the above-mentioned elastomer nonwoven web on at least one surface of a polyurethane-based film having a thickness of 5 to 40 μm and a stretchable polyurethane film, a natural rubber sheet, a foamed sheet, or the like. Alternatively, a laminate obtained by laminating or laminating a hydroentangled nonwoven fabric can be used, but it is preferable that each of them has moisture permeability in order to prevent stuffiness.
[0036]
The lamination of the back sheet 10 and the side sheet 20 is bonded with a hot melt adhesive. The method of applying the hot melt adhesive is not particularly limited as long as it is a commonly used method such as a bead, a spiral, and a melt blow, but the influence on the elasticity by the adhesive is reduced, and the texture of the sheet after lamination is good. For this reason, it is desirable that the amount of the adhesive used is as small as possible and that the adhesive is uniformly applied to the entire surface of the application, and it is more preferable to apply the adhesive by melt blowing. The melt-blown bonding is used throughout the diaper manufacturing process.
[0037]
In addition, as the belt-like sheet forming the elastic ribbon 16 that imparts gathers to the waist opening 2, a nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin is used. In order to improve the fit around the waist, it is desirable that the nonwoven fabric is relatively bulky and excellent in flexibility.
Also, the width of the stretchable elastic region of the elastic ribbon 16 is 5 to 50 mm, preferably 20 to 30 mm. If the width is less than 5 mm, the area where the elastic ribbon 16 is in contact with the skin is too small, and the elastic ribbon 16 is tightened by contraction. Pressure is increased and marks are easily formed on the skin, which is not preferable. On the other hand, if the width exceeds 50 mm, it is too wide and the appearance is not good, and it may be folded inside during wearing, which is not preferable. The width of the sandwiching region 17 of the elastic ribbon 16 may be a width enough to obtain a sufficient adhesive strength of the laminate of the elastic ribbon 16, the absorber 9, and the liquid impermeable backsheet 10. When joining with a hot-melt adhesive, it is preferably about 5 to 20 mm.
[0038]
When the liquid-impermeable back sheet 10 has elasticity, when the sheet having elasticity is joined to the elastic ribbon 16 in an extended state to complete a pants-type disposable diaper, the waist opening 2 is It can be expanded to the width of the diaper main body, and the opening is large, so that it can be easily attached and detached. In addition, the elastic ribbon 16 and the side sheet 20 shrink during wearing and are in a state of tension, so around the waist and around the waist. It adheres tightly to the wearer and does not slip off the diaper, so it looks better.
[0039]
In the above-described embodiment, a disposable diaper having a three-dimensional pants type is shown in advance. However, the side flap portion 4 is provided with a fastening means without adhesively closing the side seam 7 and the diaper is used by the fastening means when the diaper is used. The front body 5 and the back body 6 may be mounted by bonding and fixing.
[0040]
【The invention's effect】
In the disposable diaper of the present invention, the base end of the three-dimensional gather is located on the lower surface of the absorber, and when the three-dimensional gather is raised, both side edges of the absorber are also simultaneously raised to act as a part of the three-dimensional gather. Therefore, it has a good leakage prevention effect, and further has a good wearing feeling because it always follows the movement of the wearer.
[Brief description of the drawings]
FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention.
FIG. 2 is a development view in a state where a side seam of FIG. 1 is opened and an elastic member is free.
FIG. 3 is an expanded view of the elastic member in FIG. 2 in an extended state.
FIG. 4 is a cross-sectional view taken along line AA ′ of FIG. 2;
FIG. 5 is a transverse sectional view taken along the line BB ′ of FIG. 2;
FIG. 6 is a transverse sectional view showing another embodiment different from FIG. 4;
FIG. 7 is a developed view showing another embodiment different from FIG. 3;
FIG. 8 is a cross-sectional view taken along the line CC ′ of FIG. 7;
[Explanation of symbols]
1: Pants type diaper
2: Opening around waist
3: Opening around the leg
4: Side flap part
5: Front body
6: Back body
7: Side seam
8: Liquid permeable top sheet
9: absorber
10: Liquid impermeable back sheet
11: Solid gather
12: Elastic elastic member around waist opening
13: Leg-opening elastic member
14: Flap elastic member
15: Base end
16: Elastic ribbon
17: sandwiching area
18: Flap sheet
19: longitudinal end of flap sheet
20: Side seat
21: Adhesive

Claims (1)

A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber interposed between these two sheets, side flaps extending outward from both lateral edges of the absorber, In a disposable diaper having three-dimensional gathers formed near both side edges,
The side flap is formed by a portion of the back sheet extending outward from both lateral edges of the absorber and a side sheet laminated thereon, and further forms a back sheet and a side sheet constituting a side flap Between the stretch elastic members are arranged in an extended state,
The three-dimensional gather is formed by a flap sheet arranged to wrap both side edges of the absorber.
In the flap sheet, a portion located on the lower surface of the absorber is adhesively fixed to the back sheet, and a portion located on the upper surface of the absorber is provided with a stretchable elastic member extended in a side edge along a longitudinal direction. Both ends in the longitudinal direction are adhesively fixed to the top sheet on the absorber, and the side edges of the crotch region are free edges separated from the top sheet surface on the absorber, so that in the crotch region when worn, A disposable diaper characterized in that the lower part of the absorbent body stands upright together with a side edge of the absorbent body with a part adhered and fixed to a back sheet as a base end.

Images