JP3805944B2 - Disposable absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable absorbent article such as a fastening tape type, a pants-type disposable diaper, or a sanitary napkin, and particularly preferably applied to a disposable diaper of a type in which an absorbent pad type disposable paper diaper is used in combination. be able to.
[0002]
[Prior art]
In recent years, disposable absorbent articles such as disposable paper diapers and sanitary napkins are often used which are equipped with leak-proof means such as leak-proof gathers, three-dimensional gathers, and double cuffs. And in disposable paper diapers equipped with this kind of leak-proof means, when the amount of body fluid is large and a greater absorbency is required, especially when used as a diaper for adults, it is absorbent and economical. In view of the above, there is an additional use in which an absorbent pad that does not have barrier cuffs on both sides or a pad-type diaper that has barrier cuffs on both sides is used in an auxiliary manner on the absorbent body. In the following, unless otherwise noted, an absorbent pad or a pad-type diaper that is stacked on the use surface side of the main body of the paper diaper is referred to as an “auxiliary pad”.
[0003]
[Problems to be solved by the invention]
However, when the auxiliary pad is stacked on the use surface of the product paper diaper body when worn, the thickness of the absorbent body of the auxiliary pad to be added may be added, and the absorbent body of the auxiliary pad may be doubled with respect to the absorbent body of the paper diaper body. It has been found that, due to the increase in rigidity as a whole, free deformation of the barrier cuff is inhibited, and no matter how large the standing width of the barrier cuff is, it does not adhere well to the skin and does not perform its function sufficiently.
[0004]
However, it is assumed that adhesion to the skin will be ensured by increasing the elastic force of the gathers, but the shrinkage force more than necessary will cause the wearer to feel a sense of pressure, and the wearing feeling will be significantly inferior. There's a problem.
[0005]
Therefore, an object of the present invention is to provide a disposable absorbent article that has a high side leakage prevention effect and is excellent in wearing feeling, whether used alone or in an overlapping manner.
[0006]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In a disposable absorbent article having a barrier cuff for the leg circumference that stands up freely on the use surface side in use,
The barrier cuff has a distal edge that forms a free end and a proximal edge that forms a proximal end, and a base of a barrier sheet that is folded back and doubled at the distal edge is fixed to the use surface of the product. The boundary between the fixed portion and the unfixed standing region is the proximal edge of the barrier cuff,
Elastic stretch members are respectively fixed under extension in the vicinity of the distal edge in the barrier cuff and the proximal edge in the standing region ,
A waterproof sheet is sandwiched between the double barrier sheets, and the effective expansion / contraction length of the elastic expansion / contraction member near the proximal edge is shorter than the effective expansion / contraction length of the elastic expansion / contraction member near the distal edge,
The stress at the stretch rate of 60 to 150% of the portion where the elastic elastic member in the vicinity of the distal edge is disposed (per width 15 mm, length 100 mm) is 0.10 to 1.30 N, and the elasticity in the vicinity of the proximal edge The stress at the stretch rate of 60 to 150% of the portion where the elastic member is disposed (per width 15 mm, length 100 mm) is 0.20 to 2.00 N, and the stress is greater in the latter than the former, And the barrier cuff stands up in the shape of a fan paper when the barrier cuff portion is viewed from the side under non-extension freedom, and when the wearer wears the barrier cuff, the barrier cuff is front and rear at the distal edge of the distal edge and the proximal edge. The side is weaker and the center side is stronger than this, and the center side is in contact with the leg, and the distal and proximal edges of the distal edge and the proximal edge are smaller at the front and rear sides, and the center side is more upright to contact the leg circumference. ,
A disposable absorbent article characterized by that.
[0007]
<Invention of Claim 2>
In a disposable absorbent article having a barrier cuff for the leg circumference that stands up freely on the use surface side in use,
The barrier cuff has a distal edge that forms a free end and a proximal edge that forms a proximal end, and the base of a double barrier sheet in which two sheets of the same type or different types are overlapped is used with respect to the use surface of the product. The boundary between this fixed part and the unfixed standing area is the proximal edge of the barrier cuff,
Elastic stretch members are respectively fixed under extension in the vicinity of the distal edge in the barrier cuff and the proximal edge in the standing region ,
A waterproof sheet is sandwiched between the double barrier sheets, and the effective expansion / contraction length of the elastic expansion / contraction member near the proximal edge is shorter than the effective expansion / contraction length of the elastic expansion / contraction member near the distal edge,
The stress at the stretch rate of 60 to 150% of the portion where the elastic elastic member in the vicinity of the distal edge is disposed (per width 15 mm, length 100 mm) is 0.10 to 1.30 N, and the elasticity in the vicinity of the proximal edge The stress at the stretch rate of 60 to 150% of the portion where the elastic member is disposed (per width 15 mm, length 100 mm) is 0.20 to 2.00 N, and the stress is greater in the latter than the former, And the barrier cuff stands up in the shape of a fan paper when the barrier cuff portion is viewed from the side under non-extension freedom, and when the wearer wears the barrier cuff, the barrier cuff is front and rear at the distal edge of the distal edge and the proximal edge. The side is weaker and the center side is stronger than this, and the center side is in contact with the leg, and the distal and proximal edges of the distal edge and the proximal edge are smaller at the front and rear sides, and the center side is more upright to contact the leg circumference. ,
A disposable absorbent article characterized by that.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. The disposable absorbent article of the present invention can be applied to napkins and the like in addition to disposable diapers. In particular, since it is clear that the present invention can also be applied to pants-type paper diapers, only the tape-type disposable pad-type disposable diapers for adults in particular will be described below, and application examples to pants-type paper diapers will be described. Omitted.
[0009]
In the disposable diaper shown in FIG. 1 and FIG. 2, a liquid-permeable surface sheet 1 having a shape such as a rectangle made of a nonwoven fabric or a porous film, a polyethylene or polylaminated nonwoven fabric, a microvoid is formed, and vapor is transmitted but liquid is not transmitted. Between the hourglass-shaped liquid-impervious back sheet 2 made of the above, an absorbent body 3 made of cotton-like pulp or the like and having a certain degree of rigidity such as a rectangular shape or an hourglass shape is interposed. A polymer-absorbing polymer can be added to the absorber 3. The absorbent body 3 can be covered with upper and lower tissue papers 3A and 3B for absorption, and constitutes an absorbent element.
[0010]
The liquid-permeable top sheet 1 has a rectangular shape wider than the absorbent element, extends slightly outward from the side edge of the absorbent element, and is fixed to the liquid-impervious back sheet 2 by a hot melt adhesive or the like (this (In the cross section including the fixing portion, the fixing portion is indicated by *).
[0011]
On both sides of the paper diaper, there are formed leg cuffs B for leg surroundings that protrude freely on the use surface side, and the barrier cuffs B are substantially continuous with the barrier sheet 4 in the width direction, and an appropriate number of implementations. In the embodiment, two elastic elastic members for contact (elastic elastic members near the distal edge) 5A, 5A, and in an appropriate number of embodiments, three elastic elastic members for standing up (elastic elastic members near the proximal edge) 5B, 5B, 5B. These elastic elastic members can be made of, for example, thread rubber or belt rubber. Reference numeral 6 denotes a back-side leakage prevention flap, which includes a contact elastic expansion / contraction member 7A at the distal edge and a pressing elastic expansion / contraction member 7B at the base of the free portion. 8 is a fastening tape.
[0012]
Further, the barrier cuff B is formed by double folding the barrier sheet 4 by shortening the inner surface side inwardly, and forming the elastic elastic members 5A and 5A for contact and the elastic elastic members 5B, 5B and 5B for standing. Wrapped in a hot-melt adhesive. In the embodiment, the fold line constitutes the distal edge E1.
[0013]
The outer part in the width direction of the inner layer of the double barrier sheet 4 is fixed to the surface of the liquid-impervious back sheet 2 with the sticking start edge at the end of the liquid-permeable surface sheet 1, and the outer part of the outer layer of the barrier sheet 4 is also the same. Each is fixed to the surface of the liquid-permeable back sheet 2 with a hot melt adhesive or the like.
[0014]
As a result, the starting edge of the inner layer of the double barrier sheet 4 to the liquid-permeable surface sheet 1 forms the proximal edge E2 of the barrier cuff B. Around the leg, the inner side of the proximal edge E2 is a free-standing standing area Z that is not fixed to the product body.
[0015]
The length L in the product width direction of the standing region Z around the leg of the barrier cuff B is preferably 10 mm or more, particularly 30 to 80 mm in the case of a paper diaper.
[0016]
On the other hand, as shown in FIG. 1, when attention is paid to the fixing relationship between the barrier sheet 4 and the product excluding the barrier sheet 4 at the end in the longitudinal direction, both ends in the longitudinal direction of the barrier sheet 4 in the standing region Z are on the use surface side of the product. Specifically, in the embodiment, the back side is fixed on the back side leakage preventing flap 6 and the liquid-permeable surface sheet 1 by a hot melt adhesive, and the abdomen side is not provided with a flap. It is directly fixed on the liquid surface sheet 1 by a hot melt adhesive.
[0017]
In particular, as shown in FIG. 1, the fixing point F of the hot melt adhesive is indicated by a halftone dot, and on the abdominal side, the fixing start position f1 of the barrier sheet 4 on the standing distal edge E1 side is on the standing proximal edge E2 side. It deviates from the fixing start position f2 toward the end edge in the longitudinal direction of the product. The fixing start position f3 of the barrier sheet 4 on the back side is parallel to the edge in the longitudinal direction of the product and is not displaced.
[0018]
Under such a relationship, the elastic contact members 5A and 5A are disposed in the vicinity of the standing distal edge E1 of the barrier cuff B, and the elastic stretching member for standing is disposed in the vicinity of the standing proximal edge E2 in the standing region Z of the barrier cuff B. Members 5B, 5B, 5B are arranged.
[0019]
For the elastic elastic members 5A and 5A for contact, the length portion between f1 and f3 is contracted, and for the elastic elastic members 5B, 5B and 5B for standing up, the length portion between f2 and f3 is contracted. Further, it is fixed to the barrier sheet 4 with a hot melt adhesive under elongation. Therefore, the effective elastic length of the standing elastic elastic members 5B, 5B, 5B is shorter than the effective elastic length of the contact elastic elastic members 5A, 5A.
[0020]
The upper stage of FIG. 2 is a state in which the paper diaper is elongated in the longitudinal direction. However, as shown in the lower stage of FIG. 2, the paper diaper is attached to the body in a boat shape in the front-rear direction. 5A,... And 5B... Acts, so that the front and rear ends of the product retain the same form as the upper stage of FIG. 2 and the elastic force members 5A,. Barrier cuffs B stand up.
[0021]
At this time, the side flap portion is deformed and lifted, and the absorber 3 is also lifted while being slightly deformed to form a deep pocket space.
[0022]
In addition, in this lifted state, the strong contraction force of the elastic elastic members 5B, 5B, 5B for standing acts on the barrier cuff B itself, so that the barrier cuff B acts so as to stand almost vertically. At the same time, the barrier elastic cuffs 5A and 5A are weak, but the barrier cuffs B are raised by the contraction force. However, even if the contracting force of the elastic elastic members 5A and 5A for contact is weak, the rising force of the barrier cuff B by the elastic elastic members 5B, 5B and 5B for standing is large, so that the barrier cuff B is reliably secured as a whole. Is done. And since the contractive force of the elastic elastic members 5A, 5A for contact is not strong, there is no excessive pressure contact with the wearer's skin.
[0023]
Further, FIG. 5 supplementarily explains the standing manner of the barrier cuff. The elastic elastic members 5A and 5A for contact use have a long effective extension length and their contraction force is weak, whereas the elastic elastic members for standing use. Since the effective extension length of 5B, 5B, and 5B is short and the contraction force is strong, the contraction force toward the longitudinal center is larger at the proximal edge side than at the distal edge side. When the part is viewed from the side, as shown in FIG. As a result, when the wearer wears, the front and rear sides are weak at the distal edge and the center side is relatively strong and contacts the leg, as shown in Fig. B. On the other hand, the front and rear sides are small at the distal edge and the center side is relatively large. And since it contacts the circumference | surroundings of a leg, it can respond appropriately that it is easy to produce a liquid leak especially from the center side of a distal edge.
[0024]
According to the embodiment of the present invention, since the rising of the barrier cuff B is reliably ensured, as shown in FIG. 6, even if the auxiliary pad 10 is disposed on the use surface side, the rising of the barrier cuff B is ensured. Thus, the auxiliary pad 10 can be reliably wrapped without sleeping or warping.
[0025]
On the other hand, as shown in FIG. 1, the fixing portion F of the hot melt adhesive is indicated by a halftone dot, and the fixing manner of the end portion of the barrier cuff B is devised on the ventral side. That is, as shown in FIG. 4, the 4A portion on the end side is a longitudinal end portion, so that the standing height of the distal edge of the barrier cuff B is small, and the base portion of the barrier cuff B is constrained by the presence of the fixing portion F. Has been. On the other hand, since the fixed portion F does not exist in the central portion 4B, the barrier cuff B tends to rise with the standing elastic elastic members 5B, 5B, 5B. However, since the standing height of the distal edge of the barrier cuff B is small at the end side 4A portion, it acts to press against the distal edge of the barrier cuff B at the central side 4B. As shown in the lower part of FIG. 4, the barrier cuff B comes to stand while inflating its intermediate portion in the height direction outward. Thereby, the pocket of the barrier cuff B is formed, and the auxiliary pad 10 can be securely wrapped.
[0026]
By the way, as a material for the barrier sheet, a breathable and liquid-impermeable plastic film, a water-repellent nonwoven fabric by silicon treatment or the like can be used. Moreover, as shown in FIG. 7, in order to prevent permeation | transmission of a liquid reliably, it is good to interpose the waterproof sheet 7C which consists of a plastic film etc. in the water-repellent nonwoven fabric or the nonwoven fabric which does not have water repellency. As a preferable non-woven fabric, a polypropylene non-woven fabric manufactured by a melt blown method is more suitable. A sheet having a thickness of 5 to 30 g / m ² as a basis weight is adhered to a bag-bound form, and a bag-like edge is used as a free end. As the elastic member, a plurality of filamentous bodies made of natural rubber, synthetic rubber, polyurethane, or the like, or a strip-shaped body can be used. In the embodiment, since the strong contraction force of 5B and 5B acts on the barrier cuff B itself, the barrier cuff B acts so as to stand substantially vertically. At the same time, two 560 denier urethane yarns are stretched over a length of 650 mm as the elastic elastic member 5A for contact, extending 280% in length, and three 560 denier urethane yarns are spaced approximately 5mm apart as the elastic elastic member 5B for standing up. And 280% stretched over a length direction of 420 mm.
[0027]
When the tape-type diaper is mounted, the elongation rate of the elastic elastic member for contact 5A and the elastic elastic member for standing 5B in the barrier cuff B varies by 60 to 150%. The elongation stress at that time is that of the elastic elastic member for contact 5A. O. 29 to 1N, preferably 0.39 to 0.90 N, and the elastic elastic member 5B for standing is O.D. If it is 39 to 1.50 N, preferably 0.49 to 1.38 N, the wearer does not feel a sense of pressure and does not create a gap in the periphery of the leg, and can exhibit excellent leakage prevention performance. . In the above-described embodiment, the stress at the time of 60 to 150% elongation of the elastic contact member 5A is O.D. 39-O. 90N, the stress at the time of 60 to 150% elongation of the elastic elastic member 5B for standing is 0.49 to 1.38N.
[0028]
Since the present invention also includes sanitary napkins having barrier cuffs and the like, considering these, stress at a stretch rate of 60 to 150% (per 15 mm width and 100 mm length) of the portion where the elastic elastic member for contact is disposed. ) Is 0.10 to 1.30 N, and the stress (width 15 mm, per length 100 mm) at the stretch rate of 60 to 150% of the portion where the elastic elastic member for standing is arranged is 0.20 to 2.00 N It is desirable.
[0029]
In the above embodiment, the leakage prevention flap 6 is provided only on the back side, but it can be provided on the abdomen side, and can be omitted. Further, if necessary, a gasket cuff can be formed by providing an elastic elastic member along the longitudinal direction in the side flap portion on the outer side in the width direction from the barrier cuff B.
[0030]
【The invention's effect】
As described above, according to the present invention, whether it is used alone or an auxiliary pad is used in an overlapping manner, the effect of preventing side leakage is high and the wearing feeling is excellent.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view of a disposable paper diaper.
FIG. 2 is a view taken along line 2-2.
FIG. 3 is a view taken along line 3-3.
FIG. 4 is a view taken along line 4A-4A and 4B-4B.
FIG. 5 is an explanatory diagram of a standing state of a barrier cuff.
FIG. 6 is a cross-sectional view of an auxiliary pad arrangement.
FIG. 7 is a cross-sectional view of another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable surface sheet, 2 ... Liquid-impermeable back sheet, 3 ... Absorber, 4 ... Barrier sheet, 5A ... Elastic elastic member for contact, 5B ... Elastic elastic member for standing, 6 ... For back side leak prevention Flap, 8 ... Fastening tape, B ... Barrier cuff, E1 ... Distal edge, E2 ... Proximal edge, F ... Fixing site, Z ... Standing region, f1, f2, f3 ... Fixing start position.

Claims (2)

In a disposable absorbent article having a barrier cuff for the leg circumference that stands up freely on the use surface side in use,
The barrier cuff has a distal edge that forms a free end and a proximal edge that forms a proximal end, and a base of a barrier sheet that is folded back and doubled at the distal edge is fixed to the use surface of the product. The boundary between the fixed portion and the unfixed standing region is the proximal edge of the barrier cuff,
Elastic stretch members are respectively fixed under extension in the vicinity of the distal edge in the barrier cuff and the proximal edge in the standing region ,
A waterproof sheet is sandwiched between the double barrier sheets, and the effective expansion / contraction length of the elastic expansion / contraction member near the proximal edge is shorter than the effective expansion / contraction length of the elastic expansion / contraction member near the distal edge,
The stress at the stretch rate of 60 to 150% of the portion where the elastic elastic member in the vicinity of the distal edge is disposed (per width 15 mm, length 100 mm) is 0.10 to 1.30 N, and the elasticity in the vicinity of the proximal edge The stress at the stretch rate of 60 to 150% of the portion where the elastic member is disposed (per width 15 mm, length 100 mm) is 0.20 to 2.00 N, and the stress is greater in the latter than the former, And the barrier cuff stands up in the shape of a fan paper when the barrier cuff portion is viewed from the side under non-extension freedom, and when the wearer wears the barrier cuff, the barrier cuff is front and rear at the distal edge of the distal edge and the proximal edge. The side is weaker and the center side is stronger than this, and the center side is in contact with the leg, and the distal and proximal edges of the distal edge and the proximal edge are smaller at the front and rear sides, and the center side is more upright to contact the leg circumference. ,
A disposable absorbent article characterized by that. In a disposable absorbent article having a barrier cuff for the leg circumference that stands up freely on the use surface side in use,
The barrier cuff has a distal edge that forms a free end and a proximal edge that forms a proximal end, and the base of a double barrier sheet in which two sheets of the same type or different types are overlapped is used with respect to the use surface of the product. The boundary between this fixed part and the unfixed standing area is the proximal edge of the barrier cuff,
Elastic stretch members are respectively fixed under extension in the vicinity of the distal edge in the barrier cuff and the proximal edge in the standing region ,
A waterproof sheet is sandwiched between the double barrier sheets, and the effective expansion / contraction length of the elastic expansion / contraction member near the proximal edge is shorter than the effective expansion / contraction length of the elastic expansion / contraction member near the distal edge,
The stress at the stretch rate of 60 to 150% of the portion where the elastic elastic member in the vicinity of the distal edge is disposed (per width 15 mm, length 100 mm) is 0.10 to 1.30 N, and the elasticity in the vicinity of the proximal edge The stress at the stretch rate of 60 to 150% of the portion where the elastic member is disposed (per width 15 mm, length 100 mm) is 0.20 to 2.00 N, and the stress is greater in the latter than the former, And the barrier cuff stands up in the shape of a fan paper when the barrier cuff portion is viewed from the side under non-extension freedom, and when the wearer wears the barrier cuff, the barrier cuff is front and rear at the distal edge of the distal edge and the proximal edge. The side is weaker and the center side is stronger than this, and the center side is in contact with the leg, and the distal and proximal edges of the distal edge and the proximal edge are smaller at the front and rear sides, and the center side is more upright to contact the leg circumference. ,
A disposable absorbent article characterized by that.

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