JP2002272784A - Paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a fitting performance for a wearer, and to surely prevent urine from leaking. SOLUTION: This paper diaper is equipped with a liquid-permeable top sheet 1, a liquid-impermeable back sheet, and an absorber 3. In this case, the top sheet 1 is located on the wearer side. The back sheet is located on the side being opposite from the wearer. The absorber 3 is located between both sheets, and inserted at the central section of a body surrounding sections A and A, and leg surrounding section B. In such a paper diaper, on the leg surrounding section B, leg surrounding elastic stretchable members 5, 5 and so forth, which reach at least the external edge 3a of the absorber 3 at the approximately central section in the longitudinal direction in the leg surrounding section B, are arranged along the mouth edge of the leg surrounding section B. Thus, by the stretchability of the leg surrounding elastic stretchable members 5, 5 and so forth, the fitting property to the buttocks is drastically increased. At the same time, the absorbency of the absorber 3 is prevented from being spoiled due to shrinkage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper having improved fit to a wearer and capable of reliably preventing leakage of bodily fluids.

[0002]

2. Description of the Related Art Generally, disposable disposable diapers include a liquid-permeable top sheet located on the wearer's side, a liquid-impermeable back sheet located on the non-wearer's side, and a sheet between these two sheets. A waist portion and an absorbent body interposed at the center of the leg portion are provided, and a double-sided adhesive tape attached to both widthwise ends of the waist portion on the back side is attached to the waist portion on the front side. We are trying to join.

As shown in FIG. 15, a plurality of waist and leg elastic elastic members 4, 4,..., 5, 5,. (E.g., thread rubber, elastic film, etc.) are provided, and the waist parts A, A, and the leg parts are provided by the elastic elastic members 4, 4,. The part B is worn in a state that the part B is securely fitted to the torso and buttocks of the wearer.

[0004]

However, in the case of the conventional disposable diaper described above, the elastic elastic members 4, 4,..., 5, 5,. The absorber 3 contracts as shown by arrows G ₁ and G ₂ due to the elastic action of the elastic elastic members 4, 4... And 5, 5. Then, wrinkles are formed also in the portion where the waist elastic elastic members 4, 4,... Are arranged. In particular, there is a portion where the bodily fluid accumulates in the absorber 3 due to expansion and contraction of the leg elastic elastic members 5, 5,. The center part in the front-rear direction may shrink and wrinkle, and the fit between the absorber 3 and the buttocks may be impaired, thereby causing a problem that liquid leakage easily occurs.

Further, in the conventional disposable diaper, the space between the three-dimensional gathers provided on both outer edges of the absorber so as to protrude toward the wearer becomes smaller due to the shrinkage of the absorber 3, so that the disposable diaper is shifted right and left. In such a case, the three-dimensional gathers cut into the crotch, causing leakage.

The present invention has been made in view of the above points, and has as its object to improve the fit to a wearer and to reliably prevent leakage of bodily fluids.

[0007]

According to the first aspect of the present invention, as a means for solving the above-mentioned problems, a liquid-permeable top sheet located on the wearer side and a liquid-impermeable top sheet located on the non-wearer side are provided. Diaper provided with an elastic back sheet, and an absorbent body interposed between these two sheets and in the center of the waistline and the leg circumference, wherein the leg circumference, the lip of the leg circumference A leg elastic elastic member extending at least to the outer edge of the absorber is provided substantially at the center in the front-rear direction of the leg periphery along the leg.

[0008] With the above construction, the elasticity of the leg elastic elastic member greatly improves the fit to the buttocks, and the front and rear portions of the leg around the leg along the lip. The leg elastic elastic member is arranged at least in a portion reaching the outer edge of the absorber at a substantially central portion in the direction, so that a leg corresponding to the absorber or a portion excluding the outer edge of the absorber is provided in the leg. Since the elastic elastic member for rotation is not provided, the absorber does not shrink and the absorbability is not impaired, and there is no fear of liquid leakage.

In order to solve the above problems, a liquid-permeable top sheet located on the wearer side and a liquid-impermeable back sheet located on the non-wearer side are provided as means for solving the above problems. In a disposable diaper having an absorbent body interposed between the two sheets and at the center of the waistline portion and the leg portion, the leg portion is provided along the edge of the leg portion at the leg portion. At the substantially central part in the front-rear direction, a leg elastic elastic member connected in the width direction across the absorber is disposed, and the leg elastic elastic member is disposed corresponding to the absorber among the leg elastic elastic members. In addition, an elasticity lowering means for lowering the elasticity is applied to each of them.

[0010] With the above construction, the elasticity of the leg elastic elastic member makes it possible for the leg part to fit well around the wearer's leg, and the leg at the portion corresponding to the absorber. Since the elastic elastic member for rotation is provided with the elasticity reducing means for reducing the elasticity, the absorber does not shrink and the absorbability is not impaired, and liquid leakage does not occur.

[0011] As in the invention of claim 3, claim 1
3. In the disposable diaper according to any one of claims 2 and 3, a plurality of waist elastic elastic members extending in the width direction are arranged in the waist portion, and the waist elastic elastic members are arranged corresponding to the absorber. In the case where an elasticity reducing means for lowering the elasticity is applied to the provided one, the elasticity of the elastic elastic member for the girth allows the girth part to fit well around the wearer's girth, and the absorber Since the elastic elastic member in the corresponding portion is provided with the elasticity reducing means for reducing the elasticity, the absorbent does not shrink and the absorbability is not impaired, and there is no fear of liquid leakage.

As in the invention of claim 4, claim 2
In the disposable diaper according to any one of (3) and (3), when a means for cutting the waist elastic elastic member is adopted as the elasticity lowering means, the elastic waist elastic member and the leg elastic elastic member are simply cut. The elasticity of the elastic elastic members for the waist and the legs can be reduced, and it can be manufactured at low cost.

As in the invention of claim 5, claim 1
In the disposable diaper according to any one of and 2, when a large number of waist elastic elastic members extending in the width direction are arranged in a portion extending from a width direction end of the waist portion to at least an outer edge of the absorber, Due to the elasticity of the waist elastic member, the girth part fits well around the wearer's girth, and extends in the width direction from the width direction end of the girth part to at least the outer edge of the absorber. Because a large number of waist elastic elastic members are provided, no elastic elastic member is provided at the portion corresponding to the absorber or at the portion except the outer edge of the absorber, and the absorber shrinks and absorbs. There is no need to worry about liquid leakage, as there is no loss of performance.

As in the invention of claim 6, claim 1
6. In the disposable diaper according to any one of claims 5 and 5, when the inner ends of the waist and leg elastic elastic members are located inside the outer edge of the absorber, the absorbability of the absorber is impaired. Within such a range, the elastic elastic member can be arranged as wide as possible in the width direction, and the fit to the wearer is further improved.

In the invention of claim 7, as a means for solving the above problems, a liquid-permeable top sheet located on the wearer side, a liquid-impermeable back sheet located on the non-wearer side, In a disposable diaper provided with an absorber interposed between these two sheets and at the center of the waist portion and the leg portion, only the waist portion has a portion corresponding to the absorber or at least two portions of the absorber. A number of waist elastic members that extend in the width direction except for portions that do not correspond to the outer edges are provided.

[0016] With the above construction, no elastic elastic member is provided around the leg, so that the absorber does not shrink and impair the absorbability, and there is no fear of liquid leakage. . Moreover, the elasticity of the waist elastic elastic member allows the waist portion to fit well around the wearer's waist, and the elastic elastic member is provided at a portion corresponding to the absorber or at a portion except the outer edge of the absorber. Since it is not disposed, the absorber does not shrink and the absorbability is not impaired, and there is no fear of liquid leakage.

As in the invention of claim 8, claim 7
In the disposable diaper according to the above, when the inner end of the waist elastic elastic member is positioned inward from the outer edge of the absorber, the elastic elastic member is moved in the width direction as long as the absorbency of the absorber is not impaired. It can be arranged as widely as possible, and the fit to the wearer is further improved.

According to the ninth aspect of the present invention, as a means for solving the above problems, a liquid-permeable top sheet located on the wearer side, a liquid-impermeable back sheet located on the non-wearer side, In a disposable diaper provided with an absorber between these two sheets and in the middle of the waist portion and the leg portion, a large number of waist elastic elastic members extending in the width direction are provided only in the waist portion. In addition, elasticity reducing means for reducing elasticity is applied to one of the elastic members for the waist around which is arranged corresponding to the absorber.

With the above construction, no elastic elastic member is provided around the leg, so that the absorber does not shrink and impair the absorbability, and there is no fear of liquid leakage. . In addition, the elasticity of the waist elastic elastic member allows the waist portion to fit well around the wearer's waist, and the elasticity of the waist elastic elastic member at the portion corresponding to the absorber reduces the elasticity. Since the lowering means is provided, the absorber does not shrink and impair the absorbability, and there is no fear of liquid leakage.

As in the tenth aspect of the present invention, in the diaper according to the ninth aspect, when the means for cutting the waist elastic elastic member is employed as the elasticity lowering means, the waist elastic elastic member is cut. Only by this, the elasticity of the waist elastic elastic member can be reduced, and it can be manufactured at low cost.

As in the eleventh aspect of the present invention, in the paper diaper according to any one of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth aspects, both outer edges of the absorber are provided. In addition, when a three-dimensional gather that stands on the wearer side is provided, and the rising point of the three-dimensional gather is set to a position inward from the outer edge at the lower part of the absorber, the three-dimensional gather rises from the outer edge of the absorber. Since the size does not become too large, the size between the three-dimensional gathers can be made large, so that even if the mounting is displaced, it does not penetrate into the crotch part.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 4 show a disposable diaper according to a first embodiment of the present invention.

This disposable diaper is of a pants type,
As shown in FIGS. 1 and 2, a liquid-permeable top sheet 1 located on the wearer side, a liquid-impermeable back sheet 2 located on the non-wearer side, and between these two sheets 1 and 2. And an absorber 3 interposed in the central part of the waist parts A, A and the leg part B.

The backsheet 1 is formed by laminating and fixing two air-permeable and liquid-permeable nonwoven fabrics. Between these nonwoven fabrics, in order to enhance the fit around the waist between the front body and the back body, A large number of waist elastic members 4 extending in the width direction extend from the widthwise ends of the waist portions A, at least to the outer edges 3a, 3a of the absorber 3.
Are arranged to prevent the absorber 3 from contracting in the width direction at least by the expansion and contraction of the waist elastic elastic members 4, 4. The waist elastic members 4, 4,... Are made of thread rubber or the like, and the interval and the number of the elastic members are appropriately determined. For example, it is preferable that the interval is about 4 to 6 mm, and about 5 to 7 pieces. It is desirable to provide at least 50% of waist elastic elastic members 4, 4... In the width direction of the flap portions without the absorber 3 in order to further improve the fit around the waist.

[0026] Further, the leg portion B is attached to the leg portion B.
The leg elastic elastic members 5, 5... Which extend at least to the outer edge 3a of the absorber 3 are disposed substantially at the center in the front-rear direction of the leg periphery B along the edge of the leg. The absorbent body 3 is prevented from contracting in the width direction due to expansion and contraction of the elastic elastic members 5, 5,. The leg elastic elastic members 5, 5,... Are made of thread rubber or the like, and serve to enhance the fit around the leg.

As shown in FIGS. 1 and 2, the absorber 3 is made of a nonwoven fabric or the like, and has a rectangular liquid-permeable top sheet 1 that directly touches the wearer's skin. A rectangular liquid-impermeable waterproof film 6 that wraps around the front side and covers both sides of the front side in a forehead form
To form an absorption main body C, and has a rectangular shape having a certain degree of rigidity. These are bonded and integrated by a hot-melt adhesive (the portions indicated by x in the figure are bonding portions). The absorbent 3 is preferably composed mainly of defibrated pulp and used in combination with a high-molecular absorbent polymer, and is provided in a form of being wrapped around crepe paper 7. Further, as the waterproof film 6,
A polyethylene film or the like is used. When it is necessary to increase the absorption capacity, it is desirable to interpose a liquid-permeable second sheet 1 ′ between the liquid-permeable top sheet 1 and the absorber 3 as shown in FIG.

The absorbent main body C is bonded and integrated with the back sheet 2 by a hot-melt adhesive almost entirely on the back surface except for a small amount of both sides of the waterproof film 6.

Further, the inner ends of the elastic members 4, 4, 5, 5... For the waist circumference and the leg circumference are located inside the outer edge 3 a of the absorber 3.
Further, of the waist elastic elastic members 4, 4,... Provided at the rim of the waist portion A are prevented from overlapping with the absorber 3. In some cases, the inner ends of the elastic elastic members 4, 4, 5, 5, 5... For the waist and legs may be positioned outside the outer edge 3 a of the absorber 3.

Further, both end portions in the width direction of the waist portions A, A are joined by joining means such as ultrasonic sealing or heat melting (the joining portion is indicated by reference numeral 10 in FIG. 1). ing.

On both sides of the absorbent main body C (specifically, on both left and right sides of the absorber 3), three-dimensional gathers D, D standing from the main body to the wearer side are formed for the purpose of leak prevention. The three-dimensional gather D is composed of an erecting sheet 8 substantially continuous in the width direction, and elastic elastic members 9, 9,... Made of thread rubber disposed in the erecting sheet 7. ing. The erecting sheet 8 is formed of a liquid impermeable or hydrophobic double sheet.

The rising point P of the three-dimensional gather D is located at a position inward from the outer edge 3a at the lower part of the absorber 3, but as shown in FIG. In some cases, the position may be shifted inward, and in other cases, as illustrated in FIG. 3, the position may be shifted greatly inward from the outer edge 3 a of the absorber 3. Further, as shown in FIG. 4, the solid gather D may be bent outward from an intermediate portion of the rising portion. In this way, the three-dimensional gather D
Since the rising dimension from the absorber outer edge 3a does not become so large, the dimension L between the three-dimensional gathers D can be increased. Then, even if it is displaced, it does not go into the crotch part H. It is desirable that the dimension L between the three-dimensional gathers D, D is 50 mm or more from the viewpoint of preventing the crotch portion H from biting.

In the disposable diaper constructed as described above, the following operational effects can be obtained.

Due to the elasticity of the leg elastic members 5, 5,..., The leg part B fits well around the wearer's leg, and the leg corresponding to the absorber 3 is used for the leg part. Since the elastic members 5, 5,... Are not provided, the absorber 3 does not shrink and impair the absorbability, and there is no fear of liquid leakage.

The elasticity of the elastic waist elastic members 4, 4,... Allows the waist portions A, A to fit well around the wearer's waist, and the waist around the portion corresponding to the absorber 3 Since the elastic members 4, 4,... Are not provided, the absorber 3 does not shrink and impair the absorptivity, and there is no fear of liquid leakage.

Furthermore, the inner ends of the elastic members 4, 4,..., 5, 5,... For the waist circumference and the leg circumference are located more inward than the outer edge 3a of the absorber 3.
As long as the absorptivity of the absorber 3 is not impaired, the waist and leg elastic elastic members 4, 4,..., 5, 5,. Therefore, the fit to the wearer is further improved.

Second Embodiment FIGS. 5 and 6 show a disposable diaper according to a second embodiment of the present invention.

In this case, the leg portion B is
The leg elastic elastic members 5, 5... Connected in the width direction across the absorber 3 are provided substantially at the center in the front-rear direction of the leg periphery B along the edge of the leg. The waist portion A is provided with a number of waist elastic members 4 extending in the width direction. The waist elastic elastic members 4 and 4 and the leg elastic elastic members 5
Of the 5 ... that are arranged corresponding to the absorber 3,
An elasticity reducing means E for reducing elasticity is provided.
In this case, as the elasticity reducing means E, the waist elastic elastic members 4, 4.
Means for cutting 5 ... are employed. In this way, the waist parts A, A and the leg part B are formed around the wearer's waist and leg due to the elasticity of the waist elastic members 4, 4,... And the leg elastic members 5, 5,. And the waist elastic elastic members 4, 4,... At the portion corresponding to the absorber 3.
The elasticity of the leg elastic elastic members 5, 5,... Is reduced by the cutting means as the elasticity reducing means E. Therefore, the absorber 3 does not shrink and impair the absorbability, and there is no fear of liquid leakage. Moreover, the waist elastic elastic members 4, 4,... And the leg elastic elastic members 5, 5,. 5 can be reduced, and it can be manufactured at low cost. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Next, with reference to FIGS. 7 to 12, a method of cutting the elastic elastic member in the disposable diaper according to the present embodiment will be described in detail.

A belt-shaped lower sheet 21 having a predetermined width is applied to an adhesive applying section 22 by a hot melt adhesive applying machine (not shown).
And the non-coating portion 23 are provided alternately, and travel from the right side to the left side (as indicated by the arrow) in the figure. The adhesive may be applied continuously in the longitudinal direction of the sheet.

The plurality of elastic elastic members 4, 4,... Are fed out of an elastic member roll (not shown), and are guided by a guide guide 31 in a state where a predetermined tension is applied by passing through a tension roll (not shown). Is attached to the lower sheet 21. At this time, the elastic sheet 4 is sandwiched between the upper sheet 41 and the lower sheet 21, and is passed between the press rolls 32, 32, so that they are pressed, and the upper sheet 41 is adhered to the adhesive application section 22. , Lower sheet 21 and elastic elastic member 4,
4 will be adhered. Thus, the elastic members 4, 4,.
Are laminated (that is, it becomes the back sheet 2 in the disposable diaper).

Subsequently, the back sheet 2 which is the laminate
, A first roll 52 having a plurality of cutting protrusions 51, 51,...
Are inserted between the second roll 54 having the concave portions 53, 53,... (See FIG. 9) into which the cut convex portions 51, 51,. Insertion cuts the elastic members 4, 4,..., 5, 5,... And forms a hole in the back sheet 2.

In the present embodiment, the back sheet 2
Elastic elastic members 4, 4
In order to perform cutting of 5, 5... And formation of holes X, X..., The first roll 52 is provided only on the overhang surface 55 provided in a part of its circumferential direction.
4 are formed so as to be in contact with the outer peripheral surface thereof, and cutting protrusions 51 are formed only on the overhanging surface 55. Therefore, as shown in FIG.
Is not opposed to the second roll 54, the first and second rolls 52, 54 are separated from each other, and the elastic members 4, 4,..., 5, 5,.
Is not performed, but when the overhang surface 55 comes to a position facing the second roll 54 as shown in FIG. Projecting surface 55 abuts on the second roll 54, and in this case, as shown in FIG. 9, the cut convex portions 51, 51,... , 4,... Or 5, 5,... Are cut and holes X, X,. At this time, if the concave base end portion 56 of the second roll 54 is formed in a tapered shape whose diameter increases toward the opening side as shown in the drawing, there is an advantage that the hole is formed more reliably and neatly. .

The cutting projections 51, 51,... Can be arranged in a matrix, but in order to more reliably cut the elastic expansion members 4, 4,. It is preferable to arrange them in a staggered pattern. In this case, the axial and circumferential pitches P ₁ and P ₂ of the first roll 52 are made equal to the desired hole pitch. It should be noted that the number of cutting projections 51, 51,...
The number may be appropriately set by the number of 4... Or 5, 5. Further, the number of rows in the roll axis direction of the cutting protrusions 51, 51,... Can be appropriately set according to the length of the adhesive non-applied portion 23. In particular, the cutting protrusions 51, 51,... In the front and rear rows in the circumferential direction overlap the gaps between the cutting protrusions 51, 51,. It is preferable to determine the size and arrangement of the elastic members, in which case the elastic members 4, 4,.
Failure to cut 5 ... is substantially eliminated.

FIG. 11 shows a more detailed cutting mode when the above-described staggered arrangement is adopted.

In the figure, it is assumed that the back seat 2 is traveling downward. Reference numeral 22 denotes an adhesive application portion, and reference numeral 23 denotes an adhesive non-application portion. The left elastic elastic member 4 or 5 is cut by the nearest seal portion 61 (corresponding to the cutting convex portion 51), and its end 4a or 5a is released from the tension state, and is joined and fixed to the sheet. The elastic member 4 or 5 contracts. If the remaining elastic elastic member 4 or 5 is captured by the downstream sealing portion 63 (corresponding to the rear cutting projection 51) before the cutting by the upstream cutting projection 51 is completed, both cutting operations are performed. Convex part 5
The elastically stretchable member 4 or 5 located between the first and the first 51 contracts toward the seal 63 when being cut by the cutting protrusion 51 on the upstream side. If the cutting by the upstream cutting projection 51 is completed before the remaining elastic expansion member 4 or 5 is captured by the downstream cutting projection 51, the adhesive application section 22 on the further downstream side Is contracted toward the elastic expansion / contraction member (not shown) existing in the above. Also, the right elastic elastic member 4 or 5 is also cut at the nearest seal portion 62,
The end 4a or 5a contracts.

In the back sheet 2 thus formed, not only is the elastic elastic member 4 or 5 reliably cut by the insertion of the cutting convex portion 51, but also the air permeability is good due to the formation of the penetrating or hollow hole. It becomes something.

In the above cutting method, the following (a) to
Deformation as shown in (h) is also possible.

(A) First and second rolls 52, 5
4, a heating means is provided on at least one of the
Alternatively, it may be configured such that the fusing of 5 and the sealing of the upper and lower sheets 41 and 21 are performed. Specifically, a rod-shaped sheathed heater may be provided near these rolls 52 and 54, or another heating means such as a high-frequency heating means, a far-infrared heater, or an oil heater may be used in combination. In the above embodiment, the cutting projections 51 such as pins and blades are used.
Is used, it is possible to cut the elastic elastic member 4 or 5 only by applying light pressure, and in this case, the flexible back sheet 2 without heat sealing of the upper and lower sheets 41 and 21 can be manufactured.

In FIG. 7, it is also possible to adopt a configuration in which the positions of the first roll 52 and the second roll 54 are reversed.

(B) As the lower sheet 21 and the upper sheet 41, non-woven fabric, plastic film, knit, woven fabric,
Paper or the like can be used. As the material, known materials such as polypropylene, polyethylene, polyester, cellulose and rayon can be used alone or in combination of two or more.

(C) Each of the sheets 41 and 21 may be a multilayer sheet in which some sheets are already laminated.

(D) As the elastic elastic member 4, a cuttable material (for example, thermoplastic polyurethane, various elastomers, rubbers, etc.), for example, a thread, a band, or a net can be used. In the above embodiment, a plurality of elastic members 4 or 5 are attached in parallel, but it is also possible to attach only one elastic member.

(E) In FIG. 7, the sheets 41,
Although the example in which the elastic elastic member 4 or 5 is bonded to the center portion in the width direction of the sheet 1 is shown, a configuration in which the elastic members 4 and 5 are bonded near the end portions of the sheets 41 and 21 may be used. Place the embossed pattern
What is necessary is just to change according to the mounting position of the elastic expansion member 4 or 5.

(F) The adhesive is used for the upper and lower sheets 41 and 21.
Can be applied to either one or both.
Further, an adhesive can be applied to the elastic elastic member 4 or 5. Further, the adhesive may be applied discontinuously or continuously along the longitudinal direction to the sheet or the like, or may be applied entirely, except for part, all or part.

(G) As shown in FIGS. 12A to 12D, the cut portion may be the adhesive applied portion Y or the adhesive non-applied portion Z.

(H) In the above embodiment, the elastically stretchable member 4 or 5 is placed between the pair of upper and lower sheets 41 and 21.
Although FIG. 12 (a) and FIG. 12 (b) show an embodiment in which the elastic elastic member is arranged and fixed on one sheet or a multilayer sheet.

Third Embodiment FIG. 13 shows a disposable diaper according to a third embodiment of the present invention.

In this case, only the outer peripheral edges 3a. A number of elastic waist elastic members 4, 4,... Extending in the width direction except for a portion not corresponding to 3a are provided. In this case, the inner ends of the waist elastic members 4, 4... Are located more inward than the outer edge 3 a of the absorber 3. That is, no elastic elastic member is provided in the leg circumference B. In this case, since the elastic elastic member is not provided in the leg circumference B, the absorbent body 3 does not shrink and the absorbability is not lost, and there is no fear of liquid leakage. In addition, the elasticity of the waist elastic elastic members 4, 4,... Enables the waist portion A to fit well around the wearer's waist, and the elastic elastic member is provided at a portion other than the outer edge 3a of the absorber 3. Is not provided, the absorber 3 does not shrink and the absorbability is not impaired, and there is no fear of liquid leakage. Also,
In the present embodiment, the waist elastic elastic members 4, 4
Since the inner end portion of the elastic member 4 is positioned inward of the outer edge 3a of the absorber 3, the elastic expandable members 4, 4,. It can be arranged widely, and the fit to the wearer is further improved. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Fourth Embodiment FIG. 14 shows a paper diaper according to a fourth embodiment of the present invention.

In this case, a large number of elastic waist elastic members 4, 4,... Extending in the width direction are provided only in the waist portions A, A, and the elastic elastic members 4, 4,. Among them, the one arranged corresponding to the absorber 3 is provided with elasticity reducing means E for reducing elasticity. As the elasticity lowering means E, means for cutting the waist elastic elastic members 4, 4,... As described in the second embodiment is employed. In this case, since the elastic elastic member is not provided in the leg circumference B, the absorbent body 3 does not shrink and the absorbability is not lost, and there is no fear of liquid leakage. Moreover, the elasticity of the waist elastic elastic members 4, 4,... Allows the waist portion A to fit well around the wearer's waist, and the elastic waist elastic members 4, 4 corresponding to the absorber 3. 4. Since the elasticity reducing means E for reducing the elasticity is provided in..., There is no possibility that the absorbent body 3 shrinks and the absorbability is impaired, and there is no fear of liquid leakage. In the present embodiment, the elasticity reducing means E
Means for cutting the waist elastic elastic members 4, 4...
4 ··· simply cut the waist elastic elastic member 4,
4 ・ ・ The elasticity of can be reduced,
It can be manufactured at low cost. The other configuration and operation and effect are the same as those in the first and second embodiments, and thus the description is omitted.

[0062]

According to the first aspect of the present invention, a liquid-permeable top sheet located on the wearer side, a liquid-impermeable back sheet located on the side opposite to the wearer, and a liquid-permeable back sheet located between the two sheets. A disposable diaper having a waist portion and an absorber interposed in the central portion of the leg portion, wherein the leg portion has a substantially central portion in the front-rear direction of the leg portion along an edge of the leg portion. Since at least the leg elastic elastic member reaching the outer edge of the absorber is disposed, the elasticity of the leg elastic elastic member greatly enhances the fit to the buttocks, and the absorbent member. There is no elastic elastic member around the leg in the corresponding part or in the part except the outer edge of the absorber, so that the absorber does not shrink and the absorbability is not impaired, and there is no risk of liquid leakage. There is.

According to the invention of claim 2, a liquid-permeable top sheet located on the wearer side, a liquid-impermeable back sheet located on the non-wearer side, In a disposable diaper having a waist portion and an absorbent body interposed in the center of the leg portion, the leg portion is provided at a substantially central portion in the front-rear direction of the leg portion along the edge of the leg portion. An elastic elastic member for the leg around which is connected in the width direction across the absorber is provided, and the elastic elastic member for the leg around which is arranged corresponding to the absorber reduces the elasticity. The elasticity of the elastic member for leg elastics allows the leg elasticity to fit well around the wearer's leg, and the leg elasticity at the portion corresponding to the absorber. Elasticity for elastic From where elastic reduction means is applied to made, also eliminates that impair the absorbent shrinks absorber, there is an effect that eliminates fear of liquid leakage.

As in the invention of claim 3, claim 1
3. In the disposable diaper according to any one of claims 2 and 3, a plurality of waist elastic elastic members extending in the width direction are arranged in the waist portion, and the waist elastic elastic members are arranged corresponding to the absorber. In the case where an elasticity reducing means for lowering the elasticity is applied to the provided one, the elasticity of the elastic elastic member for the girth allows the girth part to fit well around the wearer's girth and the absorber. Since the elastic elastic member in the corresponding portion is provided with the elasticity reducing means for reducing the elasticity, the absorbent does not shrink and the absorbability is not impaired, and there is no fear of liquid leakage.

As in the invention of claim 4, claim 2
In the disposable diaper according to any one of (3) and (3), when a means for cutting the waist elastic elastic member is adopted as the elasticity lowering means, the elastic waist elastic member and the leg elastic elastic member are simply cut. The elasticity of the elastic elastic members for the waist and the legs can be reduced, and it can be manufactured at low cost.

As in the invention of claim 5, claim 1
In the disposable diaper according to any one of and 2, when a large number of waist elastic elastic members extending in the width direction are arranged in a portion extending from a width direction end of the waist portion to at least an outer edge of the absorber, Due to the elasticity of the waist elastic member, the girth part fits well around the wearer's girth, and extends in the width direction from the width direction end of the girth part to at least the outer edge of the absorber. Because a large number of waist elastic elastic members are provided, no elastic elastic member is provided at the portion corresponding to the absorber or at the portion except the outer edge of the absorber, and the absorber shrinks and absorbs. There is no need to worry about liquid leakage, as there is no loss of performance.

As in the invention of claim 6, claim 1
6. In the disposable diaper according to any one of claims 5 and 5, when the inner ends of the waist and leg elastic elastic members are located inside the outer edge of the absorber, the absorbability of the absorber is impaired. Within such a range, the elastic elastic member can be arranged as wide as possible in the width direction, and the fit to the wearer is further improved.

According to the seventh aspect of the present invention, the liquid-permeable top sheet located on the wearer side, the liquid-impermeable back sheet located on the non-wearer side, and between these two sheets, In a disposable diaper including a waist portion and an absorber interposed in the central portion of the leg portion, only the waist portion,
A large number of waist elastic elastic members extending in the width direction are arranged except for a part corresponding to the absorber or a part not corresponding to at least both outer edges of the absorber, and an elastic elastic member is provided in a leg part. Is prevented from being disposed, so that the absorbent body does not shrink in the crotch portion to impair the absorbability, and there is an effect that there is no fear of liquid leakage. Moreover, due to the elasticity of the elastic waist elastic member,
The waist part fits well around the wearer's waist, and no elastic elastic member is provided at the part corresponding to the absorber or at the part except the outer edge of the absorber, and the absorber shrinks and absorbs There is also an effect that the property is not impaired and there is no need to worry about liquid leakage.

As in the invention of claim 8, claim 7
In the disposable diaper according to the above, when the inner end of the waist elastic elastic member is positioned inward from the outer edge of the absorber, the elastic elastic member is moved in the width direction as long as the absorbency of the absorber is not impaired. It can be arranged as widely as possible, and the fit to the wearer is further improved.

According to the ninth aspect of the present invention, there is provided a liquid-permeable top sheet located on the wearer side, a liquid-impermeable back sheet located on the non-wearer side, and In a disposable diaper including a waist portion and an absorber interposed in the central portion of the leg portion, only the waist portion,
A large number of waist elastic elastic members extending in the width direction are provided, and among the waist elastic elastic members, those arranged corresponding to the absorber are provided with elasticity reducing means for reducing elasticity. Since the elastic member is not disposed around the leg, the absorbent body does not shrink in the crotch portion to deteriorate the absorbability, and there is no danger of liquid leakage. In addition, the elasticity of the waist elastic elastic member allows the waist portion to fit well around the wearer's waist, and the elasticity of the waist elastic elastic member at the portion corresponding to the absorber reduces the elasticity. Since the lowering means is provided, it is possible to prevent the absorbent from shrinking and impairing the absorptivity, and also to prevent the liquid from leaking.

As in the tenth aspect of the present invention, in the disposable diaper according to the ninth aspect, when means for cutting the waist elastic elastic member is employed as the elasticity reducing means, the waist elastic elastic member is cut. Only by this, the elasticity of the waist elastic elastic member can be reduced, and it can be manufactured at low cost.

As in the eleventh aspect of the present invention, in the paper diaper according to any one of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth aspects, both outer edges of the absorber are provided. In addition, when a three-dimensional gather that stands on the wearer side is provided, and the rising point of the three-dimensional gather is set to a position inward from the outer edge at the lower part of the absorber, the three-dimensional gather rises from the outer edge of the absorber. Since the size does not become too large, the size between the three-dimensional gathers can be made large, so that even if the mounting is displaced, it does not penetrate into the crotch part.

[Brief description of the drawings]

FIG. 1 is a developed plan view of a disposable diaper according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the disposable diaper according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part showing another example of the disposable diaper according to the first embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part showing another example of the disposable diaper according to the first embodiment of the present invention.

FIG. 5 is an expanded plan view of a disposable diaper according to a second embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a main part of a disposable diaper according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a manufacturing apparatus for manufacturing a back sheet in a disposable diaper according to a second embodiment of the present invention.

8A and 8B are explanatory diagrams for explaining an operation mode of first and second rolls in the manufacturing apparatus of FIG. 7, wherein FIG. 8A shows a non-cut state, and FIG. 8B shows a cut state.

FIG. 9 is an explanatory diagram illustrating a state at the time of cutting in the manufacturing apparatus of FIG. 7;

FIG. 10 is a plan view showing an example of the arrangement of cutting projections on a first roll of the manufacturing apparatus in FIG. 7;

11 is an enlarged plan view showing a cutting mode in the manufacturing apparatus of FIG. 7;

FIG. 12 is an explanatory view showing various laminated structures of a stretchable sheet.

FIG. 13 is an exploded plan view of a disposable diaper according to a third embodiment of the present invention.

FIG. 14 is a developed plan view of a disposable diaper according to a fourth embodiment of the present invention.

FIG. 15 is a developed plan view of a conventionally known paper diaper.

[Explanation of symbols]

1 is a top sheet, 2 is a back sheet, 3 is an absorber, 3
a is an outer edge, 4 is a waist elastic elastic member, 5 is a leg elastic elastic member, 51 is a cutting projection, 52 is a first roll,
53 is a concave portion, 54 is a second roll, A is a waist portion, B is a leg portion, C is an absorption main body, D is a three-dimensional gather, E is a stretch reducing means, and P is a standing point.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Keiji Torigoe 4765-11 Samukawa-cho, Iyo Mishima City, Ehime Prefecture Inside Daio Paper Converting Co., Ltd. (72) Inventor Yosuke Mori 4765-11 Samukawa-cho, Iyo Mishima City, Ehime Prefecture F-term (for reference) in Daio Paper Converting Co., Ltd. 3B029 BD10 BD13 BD14 4C098 AA09 CC12 CC14 CC27

Claims (11)

[Claims] 1. A liquid-permeable top sheet positioned on the wearer side, a liquid-impermeable back sheet positioned on the non-wearer side, and a waist portion and a leg portion between these two sheets. A disposable diaper provided with an absorber interposed in a central portion, wherein the leg portion has at least the absorbent member at a substantially central portion in the front-rear direction of the leg portion along an edge of the leg portion. A disposable diaper comprising a leg elastic elastic member extending to an outer edge. 2. A liquid-permeable top sheet positioned on the wearer side, a liquid-impermeable back sheet positioned on the non-wearer side, and a waist portion and a leg portion between these two sheets. A disposable diaper having an absorber interposed in a central portion thereof, wherein the leg around the leg extends along the rim of the leg around a substantially central portion in the front-rear direction of the leg around the leg. The elastic elastic member for leg rotation connected in the width direction is disposed, and the elastic elastic member for leg elastic disposed in correspondence with the absorber has elasticity to reduce elasticity. A disposable diaper characterized by a lowering means. 3. A plurality of waist elastic members that extend in the width direction are provided in the waist portion, and a plurality of waist elastic members that are provided corresponding to the absorber are included in the waist elastic members. The disposable diaper according to any one of claims 1 and 2, further comprising an elasticity reducing means for reducing elasticity. 4. The disposable diaper according to claim 2, wherein a means for cutting the elastic elastic member for waist is adopted as the elasticity reducing means. 5. A large number of waist elastic members extending in the width direction are provided at a portion of the waist portion from a width direction end to at least an outer edge of the absorber. The disposable diaper according to any one of claims 1 and 2. 6. The body according to claim 1, wherein the inner ends of the elastic members for the waist and the leg are located inside the outer edge of the absorber. The paper diaper described. 7. A liquid-permeable top sheet positioned on the wearer side, a liquid-impermeable back sheet positioned on the non-wearer side, and a waist portion and a leg portion between these two sheets. A disposable diaper having an absorber interposed in a central portion, wherein only the waist portion has a width excluding a portion corresponding to the absorber or a portion not corresponding to at least both outer edges of the absorber. A disposable diaper comprising a number of waist elastic members that extend in the direction. 8. An inner end portion of the waist elastic elastic member,
8. The disposable diaper according to claim 7, wherein the absorbent is located inside the outer edge of the absorbent body. 9. A liquid-permeable topsheet positioned on the wearer side, a liquid-impermeable backsheet positioned on the non-wearer side, and a waist portion and a leg portion between these two sheets. A disposable diaper having an absorber interposed in a central portion, wherein only the waist portion is provided with a number of waist elastic elastic members extending in the width direction, and A disposable diaper characterized by being provided with elasticity lowering means for lowering elasticity, which is provided corresponding to the absorber. 10. The disposable diaper according to claim 9, wherein means for cutting the elastic elastic member for the waist is adopted as the elasticity reducing means. 11. A three-dimensional gather that stands on the wearer side at both outer edges of the absorber, and a rising point of the three-dimensional gather is set at a position inward from the outer edge of the lower part of the absorber. The said claim 1 characterized by the above-mentioned,
The disposable diaper according to any one of 2, 3, 4, 5, 6, 7, 8, 9, and 10.