JP3705741B2 - Disposable pants-type diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable pants-type diaper used for infants, adults, and incontinent persons.
[0002]
[Prior art and problems to be solved by the invention]
As for disposable diapers, flat-type disposable diapers using fastening means such as tape fasteners have been the mainstream, but in recent years, disposable pants-type diapers that can be worn even in a standing position and can be worn are put on the market. It has become. As such a disposable pants-type diaper, for example, in JP-A-57-77304, the side edges of the pair of left and right side flaps on the abdominal side and the side edges of the pair of left and right side flaps on the back side are mutually connected. A disposable pants-type diaper is disclosed which is bonded and fixed to form a pair of leg openings and a waist opening. Further, the pants-type diaper is configured so that elastic members adjacent to the leg opening and the waist opening are respectively arranged, and the opening is made elastic to fit the wearer's body shape. Yes.
[0003]
Such disposable pants-type diapers are usually used for toilet training for promoting infants'"diaperseparation" as disposable diapers that a wearer can wear or wear themselves in a standing position. It is also useful as an incontinent or adult diaper.
[0004]
And such a pants-type diaper is required to have an excellent fit so that the wearer can wear the excrement without leaking, and moreover, In addition, it is required that the wearer have sufficient follow-up performance even for the active movement of the wearer.
[0005]
In order to respond to such a request, the present applicant has already provided a substantially continuous elastic member over the peripheral edge of the waist opening and the pair of leg openings in Japanese Patent Publication No. 7-44945, Furthermore, a disposable pants-type diaper in which a substantially continuous gather is formed on the waistline portion is proposed, and the disposable pants-type diaper includes a gather that is substantially continuous with the periphery of the opening, and a waistline gather. Therefore, it follows the active movement of the wearer and is difficult to slip off.
In addition, as a disposable pants-type diaper having a waistline gather, a disposable pants-type diaper in which an elastic member in the waistline portion is arranged on a loop, or an elastic member having different elongation rates on the stomach side and the back side Disposable pants-type diapers are proposed.
[0006]
However, the disposable pants-type diaper has a problem that the disposable pants-type diaper increases in weight due to the excretion of the wearer, and the disposable pants-type diaper for infants wears the older children. Therefore, there is a demand for a disposable pants-type diaper having a follow-up property like underwear rather than the above-mentioned disposable pants-type diaper.
[0007]
Accordingly, an object of the present invention is to provide a disposable pants-type diaper having a further slip-off preventing effect and having an excellent fit so that the wearer can sufficiently follow even when actively exercising.
[0008]
[Means for Solving the Problems]
The present invention includes a main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body that is interposed between both sheets to store and retain excrement, and the main body is worn by the wearer A ventral side portion located on the ventral side, a dorsal side portion located on the dorsal side, and a crotch portion located between the ventral side portion and the dorsal side portion. A waist opening and a pair of leg openings are formed by joining and fixing the left and right side edges of each side part, and each of the waist opening and the pair of leg openings extends over the entire circumference of the periphery. A waist elastic member and a leg elastic member forming a substantially continuous gather are arranged, and a plurality of waistline elastic members are arranged on the abdominal side portion and the back side portion of the waistline portion that is located around the wearer's waist when worn. And the waistline gather is formed A plurality of waistline elastic members disposed on the abdominal side of the disposable pants-type diaper are curved in a smooth curve toward the crotch and The amount of displacement of the curvilinear waistline elastic member arranged on the abdominal side is maximum at the central part of the abdominal side. The object is achieved by providing a disposable pants-type diaper characterized by the above.
[0010]
(Delete)
[0011]
Further, the present invention provides the leg elastic member, the first leg elastic member disposed across the width direction of the diaper from the one side edge of the ventral side part to the other side edge in the crotch part, and the back A first leg elastic member and a second leg elastic member which are arranged from one side edge of the side part to the other side edge across the width of the diaper in the crotch part. leg elastic members is intended to provide the disposable pants-type diaper which intersect at the crotch portion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, with reference to an accompanying drawing, a desirable form of a disposable pants type diaper of the present invention is explained in detail. In addition, in each following form, it demonstrates using the disposable pants type diaper for infants as an example .
[0013]
First, with reference to FIG.1 and FIG.2, the 1st form of the disposable pants-type diaper of this invention is demonstrated.
Here, FIG. 1 is a perspective view showing the disposable pants-type diaper of the first embodiment , and FIG. 2 is a development view of the disposable pants-type diaper shown in FIG.
[0014]
A disposable pants-type diaper 1 according to the first embodiment shown in FIGS. 1 and 2 is a liquid-permeable top sheet 11, a liquid-impermeable back sheet 12, and is interposed between both sheets to store and hold excrement. A body 10 having an absorbent body 13 to be worn, the body 10 being abdomen side 2 located on the abdomen side of the wearer when worn, a back side part 3 located on the back side, the abdomen side part 2 and the abdomen It is divided into a crotch part 4 located between the dorsal side parts 3, and the abdomen side part 2 and the left and right side edges 2a, 2b and 3a, 3b of each of the dorsal side part 3 are joined and fixed to the waist. An opening 5 and a pair of leg openings 6 are formed. The waist opening 5 and the pair of leg openings 6 each have waist elasticity that forms a substantially continuous gather over the entire circumference of the periphery. The member 14 and the leg elastic member 15 are arranged. Further, a plurality of waist elastic members 30 are disposed of waist gather the flank 2 of the waist portion 7 located waist of the wearer is formed when worn.
[0015]
More specifically, the absorbent body 13 has an overflowing hourglass shape formed by constricting the central portion in the longitudinal direction, and the top sheet 11 and the back sheet 12 have the central portion in the longitudinal direction as well. It is a constricted shape.
[0016]
The waist elastic member 14 and the leg elastic member 15 are bonded and fixed between the top sheet 11 and the back sheet 12 by an adhesive, respectively.
[0017]
The waist elastic member 14, the ventral 2 and the back side portion 3 are disposed One not a three in parallel along the respective waist opening edge. The waist elastic member 14 is continuously arranged from the side edges 2a and 3a of the ventral side 2 and the back side 3 to the side edges 2b and 3b.
[0018]
Further, the leg elastic members 15, over the back side portion 3 passes through the crotch section 4 from the ventral side portion 2 are arranged in parallel One not a three on the left and right both leg openings 6. Further, as shown in FIG. 2, the leg elastic member 15 is not locally tightened because the rubber interval is not narrow in the crotch part 4 of the leg opening 6.
[0019]
Further, the waist elastic member 14 and the leg elastic member 15 are joined at the joint portion 20 (see FIG. 1) when the side edges 2a and 3a and the side edges 2b and 3b are joined and fixed, respectively. The elastic members are overlapped so that a substantially continuous ring-shaped gather is formed in the waist opening 5 and the leg opening 6. By forming the ring-shaped gather in this way, the fit is improved.
Similarly, the side edges 2a, 3a and the upper and lower edges of the side edges 2b, 3b are joined so as to coincide with each other.
[0020]
The fastening force of the leg elastic member 15 is preferably symmetrical with respect to the longitudinal center line a of the disposable diaper, and the same material is used on both the left and right sides of the longitudinal center line a. Since the tightening force and the elongation rate of the elastic member on the wearer's body are equal to the left and right, the disposable diaper is excellent in wearing feeling and has a beautiful appearance when worn and the appearance of the product.
Here, the elongation rate of the elastic member indicates how the elastic member is stretched, and indicates the percentage of elongation when the length when not stretched is 100. When the elongation rate is high Will stretch an elastic member with a short length in a non-stretched state, and conversely, if the elongation rate is low, a long elastic member in a non-stretched state will be stretched. .
Therefore, if the expansion rate varies from side to side, the left and right squeezes vary and the appearance of the product deteriorates.
[0021]
Similarly, the waist elastic member 14 is designed with a clamping force and an elongation rate that are symmetrical with respect to the vertical center line a, but may not necessarily be symmetrical with respect to the horizontal center line b.
The tightening force of the waist elastic member 14 is preferably 20 to 1000 g, and the elongation rate is preferably 120% to 400%.
Moreover, it is preferable that the fastening force of the said leg elastic member 15 is 20-1000 g, and it is preferable that an elongation rate is arrange | positioned at 120%-400%. In the above-described elongation rate, the elongation rate of 100% is the natural length of zero stress.
[0022]
Thus, as shown in FIGS. 1 and 2, in the disposable pants-type diaper according to the first embodiment , four of the waistline elastic members 30 provided on the abdomen are displaced toward the crotch 4 side. Arranged in shape.
[0023]
More specifically, five waistline elastic members 30 are arranged on the abdominal side 2 and the waistline elastic members 30a closest to the waist opening 5 are arranged in a straight line, but the remaining four 30b, 30c, 30d, and 30e are arranged in a shape that is curved in a smooth curved shape toward the crotch part 4 and displaced toward the crotch part 4 side at the center in the width direction of the diaper. Yes. The amount of displacement increases from the waistline elastic member 30b on the waist opening 5 side toward the waistline elastic member 30e on the crotch side.
Here, the amount of displacement is a numerical value indicating how curvedly arranged, and is a straight line parallel to the width direction of the diaper between the side edges 2a, 3a to 2b, 3b in the waist elastic members 30a-30e. It is a value defined by a numerical value indicating how much the maximum displacement of the rubber actually arranged with respect to the virtual line connected with the. In the waistline elastic member 30a, the displacement is 0 mm.
[0024]
Further, it is preferable that the amount of displacement is the same from the waistline elastic member 30b to the waistline elastic member 30e, or increases by 20 mm or less from the waistline elastic member 30b toward the waistline elastic member 30e.
Specifically, the displacement amount of the waistline elastic member 30b is preferably 5 mm, the displacement amount of the waistline elastic member 30c is preferably 10 mm, and the displacement amount of the waistline elastic member 30d is 15 mm. The displacement amount of the waistline elastic member 30e is preferably 20 mm.
[0025]
Moreover, when the usage-amount in one absorbent article of the waist elastic members 30a-30e is the same, although the elongation rate of 30e becomes higher than 30a, the elongation rate is not necessarily high just because displacement is large. Do not mean. The elongation rate is equal or lower by 30% or less between adjacent elastic members from the waistline elastic member 30a disposed on the waist opening 5 side to the waistline elastic member 30e disposed on the crotch part side. Specifically, the stretch rate of the waistline elastic member 30a is preferably 210%, the stretch rate of the waistline elastic member 30b is preferably 200%, and the waistline elastic member The stretch rate of 30c is preferably 200%, the stretch rate of the waistline elastic member 30d is preferably 180%, and the stretch rate of the waistline elastic member 30e is preferably 180%.
The waistline elastic members 30a to 30e are arranged in parallel without crossing each other. In addition, the waistline elastic members 30a to 30e are continuously stretched from one side edge 2a to the other side edge 2b in the abdominal side part 2, respectively.
[0026]
Further, as shown in FIG. 2, the waistline elastic member 30 is disposed between the top sheet 11 and the backsheet 12, but the absorber 13 and the backsheet 12 are overlapped with the absorber 13. It is arranged between. If it arrange | positions at the top sheet 11 side, the top sheet 11 will leave | separate from the absorber 13 surface, and absorption performance may fall. Therefore, when the waistline elastic member 30 is arranged between the absorber 13 and the top sheet 11, the absorber 13 (may be a mount portion that wraps the absorber 13), the topsheet 11, and the waistline elastic member 30. Must be sufficiently adhered and fixed.
[0027]
Further, in the portion where the waistline elastic member 30 overlaps with the absorber 13, the stretch rate of the waistline elastic member 30 is made lower than the stretch rate of the portion that does not overlap the absorber 13, so that a disposable pants-type diaper is formed. The waistline elastic member 30 has a uniform elongation ratio distribution, and a disposable pants-type diaper is formed without adhering the waistline elastic member 30 to other members in a portion overlapping the absorber 13. It is preferable that the stretching force is not transmitted to the absorber 13. By comprising in this way, since the shrinkage | contraction effect | action of rubber | gum is not transmitted to the absorber 13, the absorber 13 cannot become wrinkle easily, and a twist can be decreased.
[0028]
Further, the waistline elastic member 30 is further arranged on the back side portion 3, and four pieces are arranged on the back side portion 3. As for the waistline elastic member 30 arranged on the back side 3, the waistline elastic member 30i on the side closest to the waist opening 5 is also arranged in a straight line, but the remaining three 30h, 30g and 30f are The central portion in the width direction is arranged in a state of being smoothly curved by being displaced toward the crotch side, and the amount of displacement increases as the distance from the waist opening 5 increases.
[0029]
The change in the amount of displacement is preferably the same from the waistline elastic member 30h to the waistline elastic member 30f, or increases by 30 mm or less from the waistline elastic member 30h toward the waistline elastic member 30f.
Specifically, the displacement amount of the waistline elastic member 30h is preferably 10 mm, the displacement amount of the waistline elastic member 30g is preferably 20 mm, and the displacement amount of the waistline elastic member 30f is 30 mm. Is preferred.
[0030]
Further, the stretch rate of the waistline elastic members 30f to 30i of the back side part 3 is such that each elastic member adjacent to the waistline elastic member 30f disposed on the crotch part side extends from the waistline elastic member 30i disposed on the waist opening 5 side. The waistline elastic member 30i preferably has an elongation rate of 200%, and the waistline elastic member 30h has an elongation rate of preferably 30% or less. 200%, the stretch rate of the waistline elastic member 30g is preferably 180%, and the stretch rate of the waistline elastic member 30f is preferably 180%.
The waistline elastic members 30f to 30i are arranged in parallel without crossing each other. Further, the waistline elastic members 30f to 30i are continuously stretched from the one side edge 3a to the other side edge 3b in the back side portion 3, respectively.
[0031]
The average elastic stress of the waistline elastic members 30 a to 30 e arranged on the abdominal side part 2 is larger than the average expansion stress of the waistline elastic members 30 f to 30 i arranged on the back side part 3. Specifically, the average stretching stress of the waistline elastic members 30a to 30e is preferably 20 to 900 g, and the average stretching stress of the waistline elastic members 30f to 30i is preferably 20 to 800 g.
[0032]
Further, in order to further improve the fit, a gradient of contraction stress can be applied from the waist elastic member 14 to the waistline elastic member 30. The shrinkage stress is preferably designed so that the crotch side portion of the waistline elastic member 30 is lower with respect to the vicinity of the waist opening 5. Specifically, the waistline elastic member 14 and the waistline elastic member 30 When the elastic members constituting each are the same type, it is preferable to provide a gradient of 2 to 3 steps or more.
[0033]
Further, the waistline elastic member 30 is also designed with an extension rate symmetrical with respect to the vertical center line a, but it is not necessarily symmetrical with respect to the horizontal center line b.
[0034]
Next, the constituent material of the disposable pants-type diaper will be described.
The top sheet 11 is preferably a liquid permeable sheet that allows excretion to permeate the absorbent body 13 and has a feel close to underwear. Examples of such a liquid permeable sheet include woven fabrics, nonwoven fabrics, and porous materials. A film or the like is used. The top sheet 11 may be a composite material in which a plurality of members are laminated. The top sheet 11 may be formed by applying a water repellent treatment to the peripheral portion of the top sheet 11 or joining a water repellent member having a three-dimensional gather. Functionalization can be achieved. Further, the top sheet 11 may be formed of a stretchable material.
[0035]
As the back sheet 12, at least the surface that contacts the absorber 13 needs to be liquid-impermeable, for example, a liquid-impermeable sheet that is permeable to moisture and can feel close to underwear. For example, a composite material of the sheet and woven fabric, or the sheet and nonwoven fabric may be used, and these may have elasticity.
[0036]
Moreover, when a composite material is used for the top sheet 11 and the back sheet 12, the arrangement positions of the leg elastic member 15, the waist elastic member 14, and the waistline elastic member 30 can be appropriately changed.
[0037]
Further, as the leg elastic member 15, the waist elastic member 14, and the waist elastic member 30, natural rubber, polyurethane-based, foamed polyurethane-based elastic members, or the like are used, and the shape thereof may be a thread shape, a belt shape, or the like. it can.
Each of the elastic members is preferably bonded and fixed to another member by a known means such as a pressure-sensitive adhesive such as a hot-melt adhesive, ultrasonic welding, or thermal welding. As the hot-melt type adhesive used for the above-mentioned joining and fixing, a base polymer, a tackifier and a softening agent which are basically known can be used, and rubber-based and olefin-based base polymers are used. However, other adhesives such as cold glue and solvent can also be used.
[0038]
The absorbent body 13 is preferably composed of defibrated pulp as a main material and combined with a polymer-absorbing polymer. The absorbent body 13 is heat-treated by mixing thermoplastic fibers or mixed with natural fibers of long fibers. The one with improved shape is used. Further, in order to prevent the polymer absorbing polymer from leaking out from the absorber 13, the periphery of the absorber 13 is covered with a mount, or the absorber 13 is formed in a multilayer structure, and the polymer absorbing polymer is unevenly arranged. You may make it. The polymer-absorbing polymer preferably has a property of absorbing and holding a liquid 20 times or more of its own weight and gelling.
[0039]
According to the disposable pants-type diaper of the first embodiment , since it has the waistline elastic member 30 arranged as described above, the waistline gather formed by the waistline elastic member 30 is slipped off the disposable pants-type diaper. It works in the direction of pulling up while restraining, effectively preventing slipping off and improving the fit and appearance during wearing. Moreover, since the leg opening 6 and the waist opening 5 are made elastic, it is possible to reliably prevent the excrement from leaking without causing a gap with the wearer.
Further, since the plurality of waistline elastic members 30 are arranged, the tightening force is not concentrated locally, so that the wearing feeling is very good .
Moreover, even if the waist elastic member 30 is disposed only on the abdomen, for example, when the wearer is an infant, the difference in the level of the bulge of the abdomen 2 is larger than that of the back 3, Since the slippage due to the wearer's movement is more prominent on the ventral side, the slippage prevention effect and the fit improvement effect are remarkable, but it is also arranged on the back side portion 3 as in the first embodiment. As a result, these effects can be made more prominent.
[0040]
Then, referring to FIG. 3, a description will be given of a second embodiment of the disposable pants-type diaper of the present invention.
Here, FIG. 3 is a developed view showing a second embodiment of the disposable pants-type diaper of the present invention (FIG. 2 corresponding to view).
In the following description, points different from the disposable pants-type diaper of the first embodiment are mainly described, and the description of the disposable pants-type diaper of the first embodiment is appropriately applied to the same points.
[0041]
(Delete)
[0042]
(Delete)
[0043]
(Delete)
[0044]
(Delete)
[0045]
In the disposable pants-type diaper of the second embodiment of the present invention shown in FIG. 3 , the leg elastic member 15 crosses the diaper in the width direction from the one side edge 2a of the abdominal side part 2 to the crotch part 4, and the other side edge 2b. The first leg elastic member 15a and the second leg elastic member arranged across the diaper in the crotch 4 from the one side edge 3a to the other side edge 3b from the one side edge 3a of the back side part 3 15b. Further, the first leg elastic member 15a and the second leg elastic member 15b are arranged so as to intersect with each other at the crotch part 4, thereby forming a gather that is substantially continuous with the leg opening 6. are doing. At this time, the portion overlapping the absorber 13 has a low elongation rate and prevents the absorber 13 from twisting.
[0046]
The waistline elastic member 30 is arranged in a smoothly curved shape in each of the abdominal side portion 2 and the back side portion 3 except for the elastic members 30a and 30o closest to the waist opening 5. Ten thread-like elastic members are arranged in the waistline elastic members 30a to 30j of the ventral side part 2. Further, the displacement rate and interval of each elastic member of the abdominal part 2 and the dorsal part 3 gradually increase from the elastic members 30b, 30n on the waist opening 5 side toward the elastic members 30h, 30k on the crotch part side. However, the three most crotch 30h, 30i, 30j in the ventral side 2 are arranged in the same shape with a narrower interval. Further, the end portion of the elastic member 30j on the most crotch part side does not cover both side edges 2a and 2b of the ventral side portion 2. Moreover, the back side part 3 is comprised by five elastic members.
The disposable pants-type diaper of this embodiment also has the same effect as the disposable pants-type diaper of the first embodiment .
[0047]
The disposable pants-type diaper of the present invention is not limited to the above-described form, and various modifications can be made without departing from the spirit of the present invention.
For example, the leg elastic member 15 and the waist elastic member 14 are formed by arranging several pieces of tape-like elastic member pieces on the periphery of the opening so as to interlock with each other so as to form a substantially continuous gather. May be.
The number of the waistline elastic members is not particularly limited as long as it is two or more.
[0048]
【The invention's effect】
The disposable pants-type diaper of the present invention has a further slip-off preventing effect and is excellent in fit so that the wearer can sufficiently follow even if actively exercising. For any movement of the wearer, the girth gathers formed in a curved shape effectively prevent the disposable pants-type diaper from slipping off, fits the wearer, and does not create a gap on the side, so excretion Leakage of objects can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a disposable pants-type diaper according to a first embodiment of the present invention.
FIG. 2 is a development view of the disposable pants-type diaper shown in FIG.
FIG. 3 is a development view (corresponding to FIG. 2) showing a second embodiment of the disposable pants-type diaper of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable pants type diaper 2 Abdominal side part 2a, 2b Left and right both side edge part of abdominal side part 3 Back side part 3a, 3b Both side edge part of back side part 4 Crotch part 5 Waist opening part 6 Leg opening part 7 Trunk circumference part 10 Main body 11 Top sheet 12 Back sheet 13 Absorber 14 Waist elastic member 15 Leg elastic member 30 Girth elastic member

Claims (2)

A main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body that is interposed between the sheets and accommodates and holds excrement, and the main body is placed on the abdomen side of the wearer when worn It is divided into an abdominal part located, a dorsal part located on the dorsal side, and a crotch part located between the abdominal part and the dorsal part, and each of the abdominal part and the dorsal part A waist opening and a pair of leg openings are formed by bonding and fixing the left and right side edges, respectively, and the waist opening and the pair of leg openings are substantially continuous over the entire circumference of the periphery. A waist elastic member and a leg elastic member are formed to form a gathered gather, and a plurality of waistline elastic members are arranged on the abdominal side portion and the back side portion of the waistline portion located around the waist of the wearer when worn. Disposable pack that is formed A tree-type diaper,
The plurality of waistline elastic members arranged on the abdomen side are arranged in a straight line and in a shape curved in a smooth curve toward the crotch and displaced to the crotch side is constituted by the those,
The disposable pants-type diaper characterized in that the amount of displacement of the curvilinear waistline elastic member arranged on the abdominal side is maximum at the center of the abdominal side . The leg elastic member includes a first leg elastic member disposed across from the one side edge of the ventral side part to the other side edge of the crotch part in the width direction of the diaper, and one side edge of the back side part And a second leg elastic member arranged across the width direction of the diaper at the crotch and extending to the other side edge,
The first leg elastic member and the disposable pants-type diaper according to claim 1 Symbol mounting the second leg elastic member, characterized in that intersect at the crotch portion.