JP3015067B2 - Pants-type disposable diapers - Google Patents

Description

The present invention relates to a pants-type disposable diaper used for infants, adults or incontinent persons.

[Conventional technology]

Conventionally, various disposable diapers have been proposed. The main disposable diaper among them includes a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber located between these two sheets, and a pair of left and right side flaps. This is a so-called flat type in which fasteners (tape fasteners) arranged on both side edges of the side waist are fastened in the abdominal region. As shown in FIG. 6, another type of flat disposable diaper 1 shown in FIG. 6 has a top sheet 2, a back sheet 3, an absorber 4, and side flaps 5, similarly to the flat disposable diaper. 5, the waist portions 5A, 5A on the back side of the side flaps 5, 5 are respectively extended in the width direction thereof to form extensions so as to cover the torso of the wearer. The tape fasteners 6, 6 provided are configured to be able to be fixed to the attachment area 8 formed on the waist 7 on the abdomen side. Elastic members 9 and 10 are provided on the leg portion 5B and the waist portion 7 of the side flaps 5 and 5, respectively, to enhance the fit when worn (Japanese Patent Publication No. 52-40267).

Also, recently, a so-called pants-type disposable diaper in which a pair of left and right leg openings and a waist opening are formed by joining and fixing both side edges of the abdominal region and the back region of the pair of left and right side flaps to each other. It has been proposed (JP-A-61-207606). The pants-type disposable diaper is configured such that a leg opening and a waist opening are formed to be extendable and contractable, respectively, to fit a body shape. Such pants-type disposable diapers can usually be worn by the wearer himself in a standing position, for toilet training to promote the infant's "diaper separation", or for incontinent or walkable people Useful for healthy adults. Further, such a pants-type disposable diaper has a good-looking sewing-tailoring appearance, and is manufactured for disposable clothing.

[Problems to be solved by the invention]

However, conventional pants-type disposable diapers
Although it has a flexible fit for active activities of older children, the size of the leg opening and waist opening is limited and it is difficult to pass the legs easily, and it is cramped, There is a problem that wearing is more difficult when flapping. In addition, the usual pants-type disposable diaper has a problem that the wearer is forced to put an unreasonable posture when worn, regardless of whether it is for an infant or an adult.

In addition, conventional pants-type disposable diapers cannot easily check the excrement inside while wearing, and must rely on the wearer's intention to do so, and However, since there is no tape fastener, there is a problem that a used disposable diaper cannot be fixed in a sealed state by using a tape fastener after the used disposable diaper is rolled up and the inside is closed.

Therefore, an object of the present invention is that it is possible to easily wear a leg without fluttering without forcing an excessive posture, and to easily confirm excretion inside the leg. Another object of the present invention is to provide a pants-type disposable diaper capable of wrapping and discarding excrement.

[Means for solving the problem]

The present inventors have conducted various studies on the structure of the pants-type disposable diaper, and as a result, have found that the above-mentioned object can be achieved by making the joints on the right and left sides of the front and rear waist portions specific.

The present invention has been made based on the above findings, and includes a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber located between these two sheets, and a width from both side edges in the longitudinal direction of the absorber. It has a pair of left and right side flaps extending outward in the direction, and an elastic elastic member that forms a gather at the legs of the pair of left and right side flaps, and the back waist and the abdomen waist are at both ends. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed and fixed to each other, widthwise cuts are provided at both the back side and the abdominal side of the pair of side flaps. The pair of side flaps are each divided into at least two side flap pieces, and at least a pair of side flap pieces located on the waist opening side are formed. A pants-type disposable diaper characterized in that another pair of side flap pieces are joined and fixed to the other waist portion or the side flap pieces, and fastening means are provided on the unjoined pair of side flap pieces. Is provided.

[Action]

ADVANTAGE OF THE INVENTION According to this invention, it mounts | wears with a pair of right and left leg openings through a waist opening like a normal underwear, and fastens each fastening means provided in both sides of a waist and / or leg part. By doing so, the waist part and / or the leg part can be adjusted.

〔Example〕

Hereinafter, the pants-type disposable diaper of the present invention (hereinafter, also simply referred to as “disposable diaper”) will be described based on the embodiment shown in FIGS. 1 to 5. 1 is a perspective view showing an embodiment of the disposable diaper according to the present invention, and FIG. 2 is a front view of a part of an intermediate product obtained by developing the disposable diaper shown in FIG. FIG. 3 is a plan view, FIG. 3 is a perspective view showing a state in which the disposable diaper shown in FIG. 1 is worn by an infant,
4 and 5 are views corresponding to FIG. 2 showing another embodiment of the disposable diaper of the present invention.

The disposable diaper 1 of the present embodiment, as shown in FIG.
A liquid-permeable top sheet 2 that forms a side in contact with the wearer's skin, an impermeable back sheet 3 corresponding to the top sheet 2, and excretion fixed and located between these two sheets 2, 3. An absorbent body 4 for absorbing an object, a pair of left and right side flaps 5 and 5 extending laterally outward from both longitudinal edges of the absorber 4, and a pair of left and right side flaps 5 and 5
Elastic portions 9, 9 forming gathers on the legs 5 B, 5 B, respectively.
The waist 7 on the abdomen side is partially joined and fixed at both ends to form a waist opening 11 and a pair of left and right leg openings 12, 12. The side flaps 5, 5 are formed by superimposing the top sheet 2 and the back sheet 3 outwardly in the width direction from both side edges of the absorber 4, and are formed in a crotch region of the side flaps 5, 5 in FIG. As shown, leg portions 5B, 5B that curve inward are formed.

As shown in FIG. 2, the disposable diaper 1 of the present embodiment has a widthwise cut 1 at each of the waist portions 5A, 5A on the back side of the pair of side flaps 5, 5.
3,13 waist portion 5A of the pair of side flaps 5, 5 provided, 5A are each divided into two side flaps piece 5A _1, 5A _2. Also, the ventral side of the waist portion 5C of the pair of side flaps 5,5, a pair of side flaps 5C and the same cuts 14, 14 also provided in 5C, 5C are two side flaps pieces 5C _1, in 5C ₂ Each is divided.
The left and right side flap pieces 5A ₁ , 5A ₁ on the opposite back side and the left and right side flap pieces 5C ₁ , 5C ₁ on the abdominal side are located on the leg portions 5B, 5B side.
5D, 5D are joined together to form a waist opening 11 and a pair of left and right leg openings 12, 12 (see FIG. 1).

Further, resilient and elastic members 15 and 15 in the entire respective side flap pieces 5A _1, 5A ₂ are disposed respectively, stretchability is imparted to the side flap pieces 5A _1, 5A _2, each side flap pieces 5A
₁ , 5A ₂ is configured to be able to expand and contract independently,
It is functionally preferable that each elastic elastic member 15, 15 expands and contracts in the width direction when worn. Also,
It is preferable that the side flaps 5A and 5C that are bonded and fixed can be easily torn in the vertical direction, and thereby, without staining the wearer's skin, the bonding portion 5D,
In 5D, the disposable diaper 1 can be easily torn, and the disposable diaper 1 can be easily taken off and discarded. The elastic expansion / contraction member 15 is provided with each side flap piece 5A ₁ , 5A
It is preferably provided respectively on a part of and at least the width direction in the entire length of the extending direction of A _2.

Further, it is preferable that the joints 5D, 5D be made of, for example, a hot-melt adhesive or a material that can be joined by ultrasonic waves, and that the touch is flexible even after joining. Further, the length is preferably 2 to 100 mm, more preferably 15 to 50 mm.

Also, a pair of unjoined side flap pieces 5A ₂ , 5A on the back side
The side edges of the A _2, flaps 5E extending extending in the width direction outside,
5E are joined to each other, and fastening means (tape fasteners) 6, 6 are provided on the extension flaps 5E, 5E, respectively. The tape fasteners 6, 6 are formed on both side edges of the waist portion 7 on the abdominal side. The disposable diaper 1 is configured to be able to be worn by being fixed to the applied areas 8, 8. The tape fastener 6 is
It is preferable that the length of the adhesive surface is equal to or shorter than the extension length of the extension flap 5E. Further, the tape fastener 6 is preferably a pressure-sensitive adhesive tape, has a strength that does not peel off from the adhered area 8 when worn, and when pulled horizontally in a plane,
Its strength is at least 600-3000 grams per inch width, more preferably 1000-2000 grams. In addition, it is preferable to use a tape fastener 6 having elasticity as the tape fastener 6 itself. By using the tape fastener 6 having elasticity as described above, the disposable diaper 1 can be used.
Can be easily mounted, and the fastening force of the tape fastener 6 can be adjusted. As an elastic tape material, it is preferable to form an elastic material that stretches 30 to 400% with a tensile force of 1000 to 1500 g / cm. To obtain an effective fit to the waist, it is 100% stretchable It is preferable that the permanent deformation of the elastic body at that time is 30% or less. Further, the extension length of the extension flap 5E is preferably 5 to 100 mm,
More preferably, it is 20 to 70 mm, even more preferably 25 to 50 mm.

Furthermore, in the disposable diaper 1 of the present embodiment, the crotch region of the absorber 4 is formed in an hourglass shape in which the crotch region is narrowed, and the crotch region of the top sheet 2 and the back sheet 3 also conforms to the shape of the absorber 4 as described above. It is curved. As shown in FIG. 2, elastic leg members 9, 9 are bent and stretched between the sheets 2, 3 on the leg portions 5 B, 5 B of the side flaps 5, respectively. , 9 are configured to contract in a free state to form the leg gathers shown in FIG. 1 to fit the crotch region. Incidentally, two or more tape fasteners 6 may be attached to each of the extended flaps 5E, 5E.

Thus, the top sheet 2 used in the disposable diaper 1 of the present embodiment is preferably a liquid-permeable sheet that allows excrement to pass through the absorbent body 4 and has a feeling close to that of underwear. As the sheet, for example, a woven fabric, a nonwoven fabric, a porous film and the like are preferable. Also, a method of applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the periphery of the top sheet 2 or a method of applying a new aqueous compound such as an alkyl phosphate ester in advance and washing the periphery with warm water may be used. By performing water treatment, leakage due to overflow of urine or the like at the periphery can be prevented.

Further, the back sheet 3 used for the disposable diaper 1 of the present embodiment is preferably a vapor-permeable, liquid-impermeable sheet that is made by adding a filler to a thermoplastic resin and is permeable to vapor, and has a feeling similar to underwear. The ones obtained are more preferable. As such a liquid impermeable sheet, for example, a composite material of a film and a woven fabric or a composite material of a film and a nonwoven fabric is preferable.

Further, the absorbent body 4 used in the disposable diaper 1 of the present embodiment is preferably a combination of a high-molecular-weight water-absorbing polymer mainly composed of defibrated pulp, and a mixture of a thermoplastic resin, cellulose fibers, and a high-molecular-weight water-absorbing polymer. Is preferably heat-treated. The location of the high-molecular-weight water-absorbing polymer may be any of the upper layer, the middle layer, and the lower layer, or may be a mixture with pulp. Further, the high-molecular-weight water-absorbing polymer has a holding performance capable of absorbing and holding a liquid of 20 times or more its own weight, and is preferably in the form of particles having a gelling property,
Examples of such a high-molecular-weight water-absorbing polymer include starch-acrylic acid (salt) graft copolymer and starch-
A saponified acrylonitrile copolymer, a crosslinked product of sodium carboxymethyl cellulose, an acrylic acid (salt) polymer and the like are preferable.

The elastic elastic members 9 and 10 used in the disposable diaper 1 of this embodiment are preferably thread rubber, flat rubber, film-type rubber or film-like foamed polyurethane.
It is preferable that the stress at the time of% elongation is 70 to 100 g, and the elastic elastic member 15 is a nonwoven fabric type having elasticity and air permeability.

Since the disposable diaper 1 has the above configuration, when worn, first, as shown in FIG. 3, the tape fasteners 6, 6 are opened to the left and right, the waist opening 11 is expanded, and the waist opening 11 is further expanded. Combined side flap pieces 5
A ₁ , after stretching the elastic elastic member 15 in 5C ₁ and passing the left and right legs of the infant through the left and right leg openings 12, 12, respectively,
Non-jointed extended flaps 5E, 5E on waist 7, 7 sides
The attract each extending flaps 5E, 5E superimposed at each side flap pieces 5C _2, 5C ₂ ventral and then, worn by fastening the respective tape fasteners 6 and 6 to the deposition area 8,8 be able to.

Therefore, according to the disposable diaper 1 of this embodiment, the left and right legs are connected to the left and right leg openings 12 through the waist opening 11 loosened by the two pairs of side flap pieces 5A ₂ and 5C ₂ whose upper ends are not joined. , 12, the fastener can be fastened to the abdominal attachment areas 8, 8 by the tape fasteners 6, 6, so that the disposable diaper 1 can be worn.
At the stage before fastening the tape fasteners 6, 6, the waist opening 11 and the leg openings 12, 12 are wide and these openings 11, 12 have room, so that even if the wearer is forced to use an unreasonable posture. Can be easily worn without
Even when the wearer moves violently by fluttering the legs, etc., it can be easily worn as long as it passes through both the left and right legs through the wide waist opening 11, and the leg portion after wearing 5B, elastic elastic member 9 forming the entire circumference of 5B,
The entire circumference of the leg from 15 to the side flap pieces 5A ₁ and 5A ₁ is from the tape fasteners 6 and 6 to the side flap pieces 5
The elasticity independent of the entire circumference of the waist portion reaching the waist flap via A ₂ and 5A ₂ is exerted, and the sealing performance at the leg portion can be ensured. In addition, the disposable diaper composed of the same elastic elastic member from the waist opening on both sides or the leg opening to the entire disposable diaper is already on the market, but in this type of diaper,
Since the elastic elastic member is integrated from the waist opening to the leg opening, the stretching force of the leg due to the movement of both legs due to walking etc. propagates to the waist and promotes diaper sliding, and conversely, wears The waist circumference changes depending on the posture of the person, and this change propagates to the leg and encourages the diaper to slip down. However, the disposable diaper 1 does not have the above-described drawbacks because the elasticity of the waist and the leg functions independently of each other. Furthermore,
Elastic elastic members 1 of side flap pieces 5A ₁ on the leg opening side and side flap pieces 5A ₂ on the waist opening side
By using materials having different elasticity as 5 and 15, the fit of the disposable diaper 1 can be optimized.

Further, the disposable diaper 1 of this embodiment, it is possible to check the internal easily by removing the tape fasteners 6 and 6 from the adherend region 8,8, side flaps 5A _1, which is joined and fixed, 5C ₁ vertical Since the disposable diaper 1 can be easily torn in the direction, it is not necessary to lower the disposable diaper 1 to the feet when taking it off, and therefore, the excrement does not stain the wearer's skin or clothes. Further, if the used one is rolled up and the inside is sealed, and then fixed with the tape fasteners 6, 6, the used one can be discarded as it is.

FIG. 4 is a view showing another embodiment of the present invention. In this disposable diaper 1, the back side flap pieces 5A ₁ and 5A ₂ are formed longer in the width direction than those in the above embodiment. On the other hand, the abdominal side flaps 5C, 5C are integrally and shortly extended from both side edges of the absorber 4 without forming a cut portion in the width direction. That is, the back side flap piece
Length and length obtained by adding the width direction of the length of the ventral side flaps 5C of the width direction of 5A ₁ is the length in the width direction of the back side of the side flap piece 5A ₁ in the above embodiment and the ventral side flaps It is formed substantially equal to the length obtained by adding the length in the width direction of the piece 5C. The side flap pieces 5A ₁ , 5A ₁ on the leg portions 5B, 5B side are respectively joined to the narrow side flaps 5C, 5C on the ventral side. The side flap piece 5A _1, 5
A ₂ elastic elastic members 15, 15 that impart elasticity to each,
It is preferable that the side flap strips 5A _1, 5A ₂ is provided on a part of each of the extension and at least the width direction in the entire length direction, the width of 5 to 150 mm, more preferably from 30 to 80 mm. The absorbent body 4 has a wide buttocks and the same width otherwise, and two strip-shaped elastic members 9 are arranged along both side edges of the absorbent body 4, respectively. An attachment area 8 is formed on the entire waist 7 on the abdomen side. Further, the ventral side flaps 5C of the disposable diaper 1, the 5C is omitted, directly bonded to the backsheet 3 and / or top sheet 2 positioned side flaps piece 5A ₁ dorsal side edges of the absorbent body 4 It may be something. Therefore, in this embodiment, the same operation and effects as those of the disposable diaper 1 of the above embodiment can be expected.

FIG. 5 is a view showing another embodiment of the disposable diaper according to the present invention, wherein the disposable diaper 1 has a back side flap.
5A is divided into three left and right, extending flaps 5E in the side flaps piece 5A _1, 5A ₃ of the leg opening 12 side and the waist opening 11 side, the tape fastener 6A to 5E, 6B are respectively provided, the central the side joining portion 5D of the flap piece 5A ₂ are joined and fixed to the junction 5D of ventral waist part. Each of the side flap pieces 5A ₁ , 5A ₂ and 5A ₃ is formed of a breathable elastic member, and in particular, the side flap piece 5A ₃ on the waist opening 11 side is formed by extending the elastic member of the waist gather. Have been. Except for the above, the configuration is the same as in each of the above embodiments. Therefore, in this embodiment, the same operation and effects as those of the disposable diaper 1 of the above embodiment can be expected, and since the disposable diaper 1 is provided with two pairs of tape fasteners, the fastening portion is long, and And it is suitable as a disposable diaper for incontinent persons.

In addition, the disposable diaper of the present invention is provided with a notch in the width direction at least on each of the waist portions on the back side of the pair of side flaps, and the integrated side flap is divided into at least two side flap pieces, and A pair of side flap pieces may be joined and fixed to the waist part on the abdomen to form a waist opening and a pair of left and right leg openings, and any fastening means may be provided on unjoined side flap pieces, respectively. Particularly for infants, the side flap pieces located on the leg side are joined, and for adults, the side flaps are divided into three parts and two pairs of tape fasteners are provided on each of the left and right sides. It is preferable because it can provide good fit. However, the number of cut portions, the number of fastening means, the length of the side flap pieces, and the like are not limited to the above embodiments as long as the function of the diaper is not impaired.

〔The invention's effect〕

The pants-type disposable diaper of the present invention is provided with a notch in the width direction at least at each of the waist portions on the back side of the pair of side flaps, and divides the pair of side flaps into at least two side flap pieces. One side flap piece is fixedly joined to the waist part on the ventral side to form a pair of left and right leg openings, and a joining means is provided for each unjoined side flap piece, so that the waist opening part and the leg opening part are provided. It is possible to easily wear it without forcing an excessive posture when wearing it, and even if the legs are fluttered. Further, the disposable diaper of the present invention can easily confirm the excrement inside by peeling off the fastening means, and can easily tear the joint-fixed side flap in the joint portion in the longitudinal direction, so that the disposable diaper can be easily disassembled. It is not necessary to pull down to the feet even when taking off, so that the excrement does not stain the wearer's skin or clothes, and furthermore, if the used one is rounded, the inside is closed and fixed by fastening means The waste can be wrapped and discarded as it is.

Further, the pants-type disposable diaper of the present invention, by imparting elasticity to a plurality of side flap pieces,
Since the waist opening and the leg opening respectively expand and contract independently, the sealing performance at the waist opening and the leg opening can be further ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the disposable diaper of the present invention, FIG. 2 is a plan view showing a surface side of a part of an intermediate product obtained by developing the disposable diaper shown in FIG. 1, and FIG. Fig. 4 is a perspective view showing a state in which the disposable diaper shown in Fig. 1 is worn by an infant, Figs. 4 and 5 are views showing another embodiment of the disposable diaper according to the present invention, and Figs. It is a perspective view showing the conventional disposable diaper. 1; disposable diapers, 2; topsheet 3; backsheet 4; absorber 5; side flaps 5A _1, 5A _2, 5A _3; side flap pieces 5C _1, 5C _2; side flap piece 5B; leg 6; Tape Fastener (fastening means) 7; waist 9, 10, 15; elastic elastic member 11; waist opening 12; leg openings 13, 14;

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 13/15

Claims (6)

(57) [Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber located between the two sheets, and a pair of right and left extending from both longitudinal edges of the absorber outward in the width direction. Side flaps, and elastic resilient members forming gathers at the legs of the pair of left and right side flaps,
In a pants-type disposable diaper in which a back waist portion and a ventral waist portion are joined and fixed at both ends to form a waist opening and a pair of left and right leg openings, a back side of the pair of side flaps Alternatively, a pair of side flaps are divided into at least two side flap pieces by providing widthwise cuts at both ends on the abdomen side, and at least a pair of side flap pieces located at the waist opening side are unjoined. A disposable diaper of a pants type, wherein another pair of side flap pieces is joined and fixed to the other waist portion or the side flap piece, and fastening means is provided on each of the unjoined pair of side flap pieces. 2. The pants-type disposable diaper according to claim 1, wherein the side flap pieces provided with the fastening means are provided with elasticity. 3. The pants-type disposable diaper according to claim 1, wherein the side flap pieces fixed to the joint have elasticity. 4. A pants-type disposable diaper according to claim 1, wherein said fastening means has elasticity. 5. A waist flap extending outward in the longitudinal direction from front and rear edges of the absorber, and elastic elastic members forming gathers are provided on the waist flaps, respectively. The pants-type disposable diaper according to any one of the above. 6. The pants-type disposable diaper according to claim 5, wherein an elastic member forming the gather of the waist flap extends to the side flap piece on the waist opening side.