JP2020156838A5 - - Google Patents

Description

The present invention relates to an articulated disposable wear article such as a tape-type disposable diaper, and particularly to a articulated disposable wear article suitable for low birth weight infants.

A typical articulated disposable wear article has a crotch area including the anterior-posterior center, a ventral portion extending anteriorly from the anterior-posterior center, and a dorsal portion extending posteriorly from the anterior-posterior center, at least the dorsal portion. Has anterior and posterior wings that extend from the crotch to the left and right sides in the width direction, the ventral and dorsal portions have a body located between the anterior and posterior wings, and the posterior wing It has a connecting portion that is detachably connected to the outer surface of the ventral portion. At the time of use, the rear wing is turned from both sides of the waist to the outer surface of the ventral portion, and the connecting portion of the rear wing is connected to the outer surface of the ventral portion (see, for example, Patent Document 1).

Such articulated disposable wear items are also used in low birth weight infants, and their design is basically the same as that used in normal infants. Therefore, the lower edges of the front wing and the rear wing are curved so as to fit tightly around the legs.

However, the conventional articulated disposable wear article has a problem that it is difficult to maintain a good limb position because the upper front surface of the thigh is pressed by the lower edges of the front wing and the rear wing when the wearer takes a good limb position. there were. It is very important to maintain a good limb position so as not to inhibit the growth of not only low birth weight infants but also infants. Or even in adults, maintaining a good limb position is very important.

Japanese Unexamined Patent Publication No. 2016-202739

Therefore, a main object of the present invention is to provide a connected disposable wearable article that can easily maintain a good limb position.

The articulated disposable wear items that have solved the above problems are as follows.
<First aspect>
The ventral part extending forward from the center in the anterior-posterior direction,
The dorsal part that extends to the rear from the center in the front-back direction,
An intermediate portion including a crotch portion extending from the middle of the ventral portion in the anteroposterior direction to the middle of the dorsal portion in the anterior-posterior direction.
The front wing, which is on the front side of the middle part and protrudes to both the left and right sides,
The rear wing that protrudes to both the left and right sides behind the middle part,
The rear wing is provided with a connecting portion that is detachably connected to the ventral portion.
In articulated disposable wear items
The anteroposterior dimension from the front end of the article to the lower edge of the front wing and the anteroposterior dimension from the rear end of the article to the lower edge of the rear wing are 25 to 35% of the total length of the article, respectively.
Both side edges of the intermediate portion are portions that pass through a width range of ± 5 mm in a direction orthogonal to the center, centered on a direction in which the acute angle side crossing angle with respect to the anteroposterior direction is less than ± 2 degrees.
The lower edge of the front wing extends so as to be located diagonally forward along the width direction or toward the side, and the acute angle side intersection angle with respect to the width direction is 0 to 10 degrees.
The lower edge of the rear wing has a first portion located on the proximal end side and a second portion located on the distal end side.
The first portion extends so as to be located diagonally forward along the width direction or toward the side, and the acute angle side crossing angle with respect to the width direction is 0 to 10 degrees.
The second portion extends so as to be located diagonally to the front side toward the side, and the acute angle side crossing angle with respect to the width direction is 25 to 50 degrees.
An articulated disposable wear item.

(Action effect)
This articulated disposable wear item has a shallow angle with respect to the width direction of the lower edge of the front wing and the lower edge of the rear wing, and its position is also closer to the waist side. Extends to. Therefore, the wearer is likely to be in a good limb position, and in a good limb position, there is less pressure on the upper front surface of the thigh. Further, of the lower edge of the rear wing, the proximal end side is the first portion along the width direction or a direction close to the front wing, whereas the distal end side is inclined away from the leg opening. Therefore, the part that is likely to touch the upper front surface of the thigh in a good limb position has high flexibility because the rear wing does not overlap and only the front wing is formed. Therefore, even when the leg is slightly moved forward from the good limb position, the portion in contact with the upper front surface of the thigh is flexible and the load on the wearer's skin is low. Further, even if the dimensions in the waist circumference direction are adjusted within the range of the dimensions in the width direction of the first portion, the second portion does not form the edge of the leg opening, so that the first portion to the second portion are formed. The corners that change into portions do not form the edge of the leg opening, and the front wing and the second portion do not form a recess in the edge of the leg opening so that the thigh is not greatly exposed.

<Second aspect>
The ventral part extending forward from the center in the anterior-posterior direction,
The dorsal part that extends to the rear from the center in the front-back direction,
An intermediate portion including a crotch portion extending from the middle of the ventral portion in the anteroposterior direction to the middle of the dorsal portion in the anterior-posterior direction.
The front wing, which is on the front side of the middle part and protrudes to both the left and right sides,
The rear wing that protrudes to both the left and right sides behind the middle part,
The rear wing is provided with a connecting portion that is detachably connected to the ventral portion.
In articulated disposable wear items
The anteroposterior dimension from the front end of the article to the lower edge of the front wing and the anteroposterior dimension from the rear end of the article to the lower edge of the rear wing are 25 to 35% of the total length of the article, respectively.
Both side edges of the intermediate portion are portions that pass through a width range of ± 5 mm in a direction orthogonal to the center, centered on a direction in which the acute angle side crossing angle with respect to the anteroposterior direction is less than ± 2 degrees.
The lower edge of the front wing is a wavy edge having a plurality of ridges bulging outward in a curved shape, and the wavy edge of the front wing is located diagonally forward along the width direction or toward the side. Along with the extension, the acute angle side crossing angle with respect to the width direction of the tangent line in contact with the adjacent mountain part is 0 to 10 degrees.
The lower edge of the rear wing has a first portion located on the proximal end side and a second portion located on the distal end side.
The first portion extends so as to be located diagonally forward along the width direction or toward the side, and the acute angle side crossing angle with respect to the width direction is 0 to 10 degrees.
The second portion is a wavy edge having a plurality of ridges bulging outward in a curved shape, and the wavy edge of the second portion extends diagonally forward along the width direction or toward the side. At the same time, the acute-angled crossing angle with respect to the width direction of the tangent line in contact with the adjacent mountain portion is 25 to 50 degrees.
An articulated disposable wear item.

(Action effect)
This articulated disposable wear item has a shallow angle with respect to the width direction of the lower edge of the front wing and the lower edge of the rear wing, and its position is also closer to the waist side. Extends to. Therefore, the wearer is likely to be in a good limb position, and there is less pressure on the leg in a good limb position. Further, of the lower edge of the rear wing, the proximal end side is the first portion along the width direction or a direction close to the front wing, whereas the distal end side is inclined away from the leg opening. Therefore, the part that is likely to touch the upper front surface of the thigh in a good limb position has high flexibility because the rear wing does not overlap and only the front wing is formed. Therefore, even when the leg is slightly moved forward from the good limb position, the portion in contact with the upper front surface of the thigh is flexible and the load on the wearer's skin is low. Further, even if the dimensions in the waist circumference direction are adjusted within the range of the dimensions in the width direction of the first portion, the second portion does not form the edge of the leg opening, so that the first portion to the second portion are formed. The corners that change into portions do not form the edge of the leg opening, and the front wing and the second portion do not form a recess in the edge of the leg opening so that the thigh is not greatly exposed.

Further, in this articulated disposable wearable article, the lower edge of the front wing and the second portion of the lower edge of the rear wing are wavy edges, and the mountain portion is easily bent when a force is applied. Therefore, even when the leg is slightly moved forward from the good limb position, the portion in contact with the upper front surface of the thigh is more flexible, and the load on the wearer's skin is further reduced.

The wavy edge does not matter whether the direction of the wave is linear or curved, and where the center line of the total amplitude (peak-to-peak) passes. Of course, as shown in FIG. 11, it goes without saying that the one that continues with a constant amplitude 22 (± 5 mm) about the specific direction 21 is included. Reference numeral 20 in FIG. 11 indicates a mountain portion. Further, the wavy edge is a combination of a sine curve (for example, see FIG. 11 (a)) and an arc (for example, see FIG. 11 (b)), those whose amplitude and wavelength change in the direction in which the wave continues, and a cloud shape (for example, a cloud shape (see FIG. 11 (b)). It includes both regular and irregular shapes, such as those with sharp (bent) bottoms as shown in FIG. 11 (c)), but is composed of straight lines such as triangular waves and square waves. Does not include those with peaks (those with sharp peaks).

<Third aspect>
The wavy edge of the front wing and the wavy edge of the second portion each have a maximum value of 1 to 10 mm and a wavelength of 10 to 20 mm.
The articulated disposable wear article of the first or second aspect.

(Action effect)
Normally, the dimensions of the wavy edge are preferably within the range of this embodiment.

<Fourth aspect>
The widthwise dimension of the front wing is 5 to 20% of the total length of the article.
The widthwise dimension of the first portion is 5 to 10% of the total length of the article, and the widthwise dimension of the second portion is 5 to 10% of the total length of the article.
A concatenated disposable wearable article according to any one of the first to third aspects.

(Action effect)
Normally, the dimensions of the first and second parts of the front wing and the rear wing are preferably within the range of this embodiment.

According to the present invention, there are advantages such as being a connected disposable wearable article that can easily maintain a good limb position.

It is a top view in the unfolded state which shows the inner surface of a tape type disposable diaper. It is a top view in the unfolded state which shows the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. (A) is a sectional view taken along line 5-5 in FIG. 1, and (b) is a sectional view taken along line 7-7 in FIG. (A) is a sectional view taken along line 8-8 of FIG. 1, and (b) is a sectional view taken along line 9-9 of FIG. (A) an enlarged view of the front wing and the rear wing, and (b) an enlarged view of a main part showing a first mounting state. (A) is an enlarged view of a main part showing a second wearing state, and (b) is an enlarged view of a main part showing a third wearing state. It is a top view in the unfolded state which shows the outer surface of a tape type disposable diaper. (A) an enlarged view of the front wing and the rear wing, and (b) an enlarged view of a main part showing a first mounting state. (A) is an enlarged view of a main part showing a second wearing state, and (b) is an enlarged view of a main part showing a third wearing state. It is explanatory drawing of the wavy edge.

1 to 7 show an example of a tape-type disposable diaper, reference numeral X in the figure indicates the entire width of the diaper excluding the connecting tape, and reference numeral L indicates the total length of the diaper. The dotted pattern portion shows a hot melt adhesive as a joining means for joining the constituent members located on the front side and the back side thereof. The hot melt adhesive can be applied by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). Can be applied. Instead of or in conjunction with this, at the fixed portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by welding a material such as a heat seal or an ultrasonic seal can also be used.

This tape-type disposable diaper has a ventral portion F extending anteriorly from the center of the anterior-posterior LD and a dorsal portion B extending posteriorly from the center of the anterior-posterior LD. Further, the shape of this tape-type disposable diaper extends from the middle of the anterior-posterior LD of the ventral portion F to the middle of the anterior-posterior LD of the dorsal portion B, and includes the intermediate portion M including the crotch portion and the intermediate portion M. It has a front wing 80 projecting on both the left and right sides on the front side, and a rear wing 90 projecting on both the left and right sides on the rear side of the intermediate portion M. Further, in this tape type disposable diaper, the absorbent body 56 built in the range including the crotch part, the liquid permeable top sheet 30 covering the front side of the absorbent body 56, and the liquid permeable top sheet 30 covering the back side of the absorbent body 56 are impermeable. It has a sheet 11 and an exterior nonwoven fabric 12 that covers the back side of the liquid-impermeable sheet 11 and constitutes the outer surface of the product.

Hereinafter, the materials and characteristic parts of each part will be described in order.
(Absorber)
The absorber 56 is a portion that absorbs and retains the excrement liquid, and can be formed by an aggregate of fibers. The fiber aggregate is a filament aggregate obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and opening tow (fiber bundle) of synthetic fibers such as cellulose acetate as needed. Can also be used. The fiber basis weight may be, for example, about 100 to 300 g / m ² in the case of stacking cotton-like pulp or staple fibers, and about 30 to 120 g / m ² in the case of filament aggregates. Can be done. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimping of the crimped fibers can be, for example, 5 to 75 pieces per 2.54 cm, preferably 10 to 50 pieces, and more preferably about 15 to 50 pieces. In addition, crimped fibers that have been uniformly crimped can be used.

(Highly absorbent polymer particles)
The absorber 56 may contain high-absorbent polymer particles in part or all of the absorber 56. The highly absorbent polymer particles include "powder" as well as "particles". As the highly absorbent polymer particles, those used for this kind of absorbent article can be used as they are. The particle size of the highly absorbent polymer particles is not particularly limited, but for example, sifting (shaking for 5 minutes) using a standard sieve (JIS Z8801-1: 2006) of 500 μm, and particles falling under the sieve by this sieving. When sifting (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve. It is desirable that the proportion of particles remaining on the top is 60% by weight or more.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, starch-acrylonitrile copolymer kendies, and cross-linking of sodium carboxymethyl cellulose. A substance, an acrylic acid (salt) polymer, or the like can be used. As the shape of the highly absorbent polymer particles, the commonly used powder or granular material is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less, are preferably used. If the water absorption rate is too slow, so-called reversion, in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56, is likely to occur.

Further, as the highly absorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the highly absorbent polymer particles can be appropriately determined according to the absorption amount required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can usually be 50 to 350 g / m ² .

(Packaging sheet)
The absorber 56 can be incorporated as an absorbent element 50 wrapped in a packaging sheet 58 in order to prevent the highly absorbent polymer particles from coming off or to improve the shape retention of the absorber 56. As the packaging sheet 58, tissue paper, particularly crepe paper, non-woven fabric, polylami non-woven fabric, a sheet having small holes, or the like can be used. However, it is desirable that the sheet does not allow the highly absorbent polymer particles to escape. When a non-woven fabric is used instead of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) non-woven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene or the like can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

As shown in FIG. 3, the packaging sheet 58 has a structure in which the entire absorber 56 is wrapped by one sheet, or the entire absorber 56 may be wrapped by a plurality of sheets such as two upper and lower sheets . The packaging sheet 58 may be omitted.

(Top sheet)
The top sheet 30 has liquid permeability, and for example, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like can be used. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based fibers, recycled fibers such as rayon and cupra, natural fibers such as cotton, mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the nonwoven fabric may be produced by any processing. As the processing method, known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method and the like can be exemplified. For example, if flexibility and drapeability are required, the spunlace method is preferable, and if bulkiness and softness are required, the thermal bond method is preferable.

The top sheet 30 extends from the front end to the rear end of the product in the front-rear direction and extends laterally from the absorber 56 in the width direction WD. For example, the starting point of the rising gather 60 described later is more than the side edge of the absorber 56. If necessary, such as when the top sheet 30 is located on the center side in the width direction, the width of the top sheet 30 can be made shorter than the total width of the absorber 56, and the like can be appropriately deformed.

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation speed than the top sheet 30 can be provided. The intermediate sheet 40 is for rapidly transferring the liquid to the absorber, enhancing the absorption performance by the absorber, and preventing the phenomenon of "reversion" of the absorbed liquid from the absorber. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace non-woven fabric, spunbond non-woven fabric, SMS non-woven fabric, pulp non-woven fabric, mixed sheet of pulp and rayon, point-bonded non-woven fabric or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 17 to 80 g / m ² , more preferably 25 to 60 g / m ² . The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

Although the intermediate sheet 40 in the illustrated example is arranged in the center shorter than the width of the absorber 56, it may be provided over the entire width. Further, the intermediate sheet 40 may be provided over the entire length of the diaper, but may be provided only in the intermediate portion M including the excretion position as shown in the illustrated example.

(Liquid impermeable sheet)
The liquid-impermeable sheet 11 is not particularly limited, but is preferably one having moisture permeability. The liquid-impermeable sheet 11 is a microporous product obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet and then stretching it in a uniaxial or biaxial direction. The sheet can be preferably used. Further, as the liquid impermeable sheet 11, a material having a non-woven fabric as a base material and having improved waterproofness can also be used.

It is desirable that the liquid impermeable sheet 11 extends in the same or wider range as the absorber 56 in the anteroposterior LD and the width WD, but if other impermeable means are present, if necessary, the liquid impermeable sheet 11 may be extended. It is also possible to have a structure that does not cover the end portion of the absorber 56 in the anteroposterior direction LD and the width direction WD.

(Exterior non-woven fabric)
The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 and gives the outer surface of the product a cloth-like appearance. The exterior nonwoven fabric 12 is not particularly limited, and the material fibers include, for example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, long-fiber non-woven fabrics such as spunbonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are suitable from the viewpoint of achieving both touch and strength. The non-woven fabric can be used alone or in layers. In the latter case, it is preferable to bond the nonwoven fabrics to each other with a hot melt adhesive or the like. When a non-woven fabric is used, the fiber basis weight is preferably 10 to 50 g / m ² , especially 15 to 30 g / m ² .

(Get up gather)
In order to prevent excrement that travels laterally along the top sheet 30 and prevent so-called lateral leakage, rising gathers 60 that stand up on the wearer's skin side are provided on both sides of the surface widthwise WD. It is preferable to have. Of course, the rising gather 60 can be omitted.

When the rising gather 60 is adopted, its structure is not particularly limited, and any known structure can be adopted. The rising gather 60 of the illustrated example is composed of a gather sheet 62 substantially continuous in the width direction WD and an elongated gather elastic member 63 fixed to the gather sheet 62 in an extended state along the front-rear direction LD. ing. A water-repellent nonwoven fabric can be used as the gather sheet 62, and a rubber thread or the like can be used as the gather elastic member 63. As shown in FIGS. 1 and 2, a plurality of elastic members may be provided, and one elastic member may be provided for each.

The inner surface of the gather sheet 62 has a joint start end in the width direction on the side portion of the top sheet 30, and the outer portion in the width direction from the joint start end is the inner surface of each side flap SF, that is, liquid opaque in the illustrated example. It is bonded to the side portion of the sex sheet 11 and the side portion of the exterior nonwoven fabric 12 located outside in the width direction by a hot melt adhesive or the like.

Around the legs, the central side in the width direction from the joint start end of the rising gather 60 is fixed on the top sheet 30 at both ends in the front-rear direction of the product, but the part in between is a non-fixed free part, and this freedom The portion rises due to the contraction force of the elastic member 63 and comes into close contact with the body surface.

(End flap, side flap)
The tape-type disposable diapers of the illustrated example have a pair of end flaps EFs that do not have an absorber 56 and extend laterally from both side edges of the absorber 56, respectively, extending to the front side and the back side of the absorber 56. It has a pair of side flap SFs that extend and do not have an absorber 56. As shown in the illustrated example, the side flap SF may be made of a main body sheet (exterior nonwoven fabric 12 or the like) continuous from the portion having the absorber 56, or may be formed by attaching another material.

(Plane gather)
A side elastic member 64 made of an elongated elastic member such as a rubber thread is fixed to each side flap SF in a state of being extended along the front-rear direction LD, whereby the leg peripheral portion of each side flap SF is flat. It is configured as a gather. As shown in the illustrated example, the side elastic member 64 is provided between the gather sheet 62 and the liquid impermeable sheet 11 on the outer side of the joint portion of the gather sheet 62 in the width direction near the joint start end, and the side flap SF is provided. It can also be provided between the liquid impermeable sheet 11 and the exterior nonwoven fabric 12 in the above. A plurality of side elastic members 64 may be provided on each side as shown in the illustrated example, or only one side elastic member 64 may be provided on each side.

The plane gather is a portion on which the contraction force of the side elastic member 64 acts (a portion in which the side elastic member 64 is shown in the drawing). Therefore, in addition to the form in which the side elastic member 64 exists only in the portion of the plane gather, the side elastic member 64 exists on the front side, the rear side, or both sides of the plane gather, but the side elasticity other than the portion of the plane gather. When the member is finely cut in one place or many places, or is not fixed to the sheet sandwiching the side elastic member 64, or both of them, the contraction force acts on the parts other than the plane gather. However, it also includes a structure in which the contractile force of the side elastic member 64 acts only on the portion of the plane gather (substantially equivalent to not providing the elastic member).

(Middle part)
Both side edges 70 of the intermediate portion M are portions that pass through a width range of ± 5 mm in a direction orthogonal to the center, centered on a direction in which the acute angle side crossing angle with respect to the anterior-posterior LD is less than ± 2 degrees. As long as it passes within this range, although not shown, both side edges 70 of the intermediate portion M may have a wavy edge similar to the wavy edge of the front wing 80 described later, or may be an inflection such as an arc. It may be a curved line having no points, or it may be a straight line as shown in the illustrated example. In particular, it is preferable that both side edges 70 of the intermediate portion M extend linearly in a direction inclined diagonally inward by 1 to 2 degrees toward the front.

(Front wing)
This tape-type disposable diaper has front wings 80 protruding to both the left and right sides on the front side of the intermediate portion M including the crotch portion. As shown in the illustrated example, the front wing 80 passes through the side edge 70 of the intermediate portion M including the crotch portion from the lower edge 81 of the front wing 80 by cutting the side portion of the side flap SF in the intermediate portion M in a concave shape. The entire concave edge 70, 81, 91, 92 up to the lower edge 91, 92 of the rear wing 90 can be formed. In this case, the laminated structure of the front wing 80 is determined by the laminated structure of the side flap SF, and in the illustrated example, the front wing 80 is formed by the gather sheet 62 and the exterior nonwoven fabric 12. Although not shown, a front extension sheet may be provided so as to project from a portion of the side flap SF on the front side of the intermediate portion M, and the entire front wing 80 or a part on the tip side may be formed by the front extension sheet. Various non-woven fabrics can be used as the front extension sheet, and in particular, a spunbonded non-woven fabric, an air-through non-woven fabric, or a spunlaced non-woven fabric having a fineness of 1.0 to 3.5 dtex, a basis weight of 60 to 100 g / m ² , and a thickness of 1 mm or less is used. Is preferable.

The lower edge 81 of the front wing 80 has a linear shape as shown in the illustrated example, a curved shape having no inflection such as an arc shape, or a curved shape outward as shown in FIGS. 8 and 9 (a). It may have a wavy edge having a plurality of ridges 20 swelling in. The dimensions of the wavy edge may be appropriately determined, but usually, the maximum value of the total amplitude is 1 to 10 mm, and the wavelength is preferably 10 to 20 mm.

The lower edge 81 of the front wing 80 extends so as to be located diagonally forward along the width direction WD or toward the side, and the acute angle side intersection angle with respect to the width direction WD is 0 to 10 degrees (more preferably). 3 to 5 degrees). When the lower edge 81 of the front wing 80 has a curved shape having no turning point, the acute angle side crossing angle θ ₁ with respect to the width direction WD of the tangent line is obtained, and when the lower edge 81 of the front wing 80 is a wavy edge. The acute angle side crossing angle with respect to the width direction WD of the tangent line 81t tangent to the adjacent mountain portion 20 is within the above range.

The upper edge (leading edge) 82 and the side edge 83 of the front wing 80 may extend in an appropriate direction at an appropriate angle, and the shape thereof may be linear, curved, or wavy. Etc. can be determined as appropriate. However, in order to reduce the waste material generated by cutting, it is usually preferable that the upper edge (leading edge) 82 of the front wing 80 extends from the front edge of the main body along the width direction WD, and the front wing 80 The side edge 83 of the above is preferably linear along the front-rear direction LD. That is, one of the simplest shapes of the front wing 80 is a rectangular shape.

The dimension 80W (expanded state shown in FIG. 6) of the width direction WD of the front wing 80 can be appropriately determined, and can be, for example, 5 to 20% (particularly 7 to 15%) of the total length L of the article. The dimension 80W of the widthwise WD of the front wing 80 can be substantially the same as the dimension of the widthwise WD of the rear wing 90 described later.

The dimension 80L of the front-rear direction LD from the front end of the article to the lower edge 81 of the front wing 80 is 25 to 35% (more preferably 28 to 32%) of the total length L of the article. This can be substantially the same as the dimension 90L of the anteroposterior LD from the rear end of the article to be described later to the lower edges 91 and 92 of the rear wing 90.

(Rear wing)
This tape-type disposable diaper has a rear wing 90 that protrudes to both the left and right sides on the rear side of the intermediate portion M. As shown in the illustrated example, the rear wing 90 passes through the side edge 70 of the intermediate portion M including the crotch portion from the lower edge 81 of the front wing 80 by cutting the side portion of the side flap SF in the intermediate portion M in a concave shape. The entire concave edge 70, 81, 91, 92 up to the lower edge 91, 92 of the rear wing 90 can be formed. In this case, the laminated structure of the rear wing 90 is determined by the laminated structure of the side flap SF, and in the illustrated example, the rear wing 90 is formed by the gather sheet 62 and the exterior nonwoven fabric 12. Although not shown, a rear extension sheet may be provided so as to project from a portion of the side flap SF on the rear side of the intermediate portion M, and the entire rear wing 90 or a part on the distal end side may be formed by the rear extension sheet. Various non-woven fabrics can be used as the post-extension sheet, and in particular, a spunbonded non-woven fabric, an air-through non-woven fabric, or a spunlaced non-woven fabric having a fineness of 1.0 to 3.5 dtex, a basis weight of 60 to 100 g / m ² , and a thickness of 1 mm or less is used. Is preferable.

The lower edge of the rear wing 90 has a first portion 91 located on the proximal end side and a second portion 92 located on the distal end side. At least one of the first portion 91 and the second portion 92 of the lower edge of the rear wing 90 has a linear shape as shown in the illustrated example, a curved shape having no inflection such as an arc shape, and FIGS. 8 and 8. As in the example shown in 9 (a), it may have a wavy edge having a plurality of mountain portions 20 bulging outward in a curved shape. The dimensions of the wavy edge may be appropriately determined, but usually, the maximum value of the total amplitude is 1 to 10 mm, and the wavelength is preferably 10 to 20 mm.

The first portion 91 extends so as to be located diagonally forward along the width direction WD or toward the side, and the acute angle side intersection angle with respect to the width direction WD is 0 to 10 degrees (more preferably 3 to 5 degrees). It has become. Further, the second portion 92 extends so as to be positioned diagonally to the front side toward the side, and the acute angle side crossing angle θ ₂ with respect to the WD in the width direction becomes 25 to 50 degrees (more preferably 25 to 30 degrees). There is. If at least one of the lower edges of the first portion 91 and the second portion 92 has a curved shape having no inflection, the acute angle side intersection angle of the tangent line with respect to the width direction WD is also determined by the first portion 91 and the second portion. When at least one lower edge of the portion 92 is a wavy edge, the acute angle side crossing angle θ ₂ with respect to the width direction WD of the tangent line 92t tangent to the adjacent mountain portion 20 is within the above range.

The upper edge 94 (trailing edge) and the side edge 93 of the trailing wing 90 may extend in an appropriate direction at an appropriate angle, and the shape thereof may be linear, curved, or wavy. Etc. can be determined as appropriate. However, in order to reduce the waste material generated by cutting, it is usually preferable that the upper edge 94 (leading edge) of the rear wing 90 extends from the front edge of the main body along the width direction WD, and the rear wing 90. The side edge 93 of the above is preferably linear along the front-rear direction LD. That is, one of the simplest rear wing 90 shapes is a trapezoidal shape in which one side connecting the upper base and the lower base is orthogonal to the upper base and the lower base.

The dimension of the width direction WD of the rear wing 90 can be appropriately determined. For example, the dimension 91W of the width direction WD of the first portion 91 is 5 to 10% (particularly 6.5 to 8.5%) of the total length L of the article. The dimension 92W in the width direction WD of the second portion 92 can be 5 to 10% (particularly 6.5 to 8.5%) of the total length L of the article. The dimension of the widthwise WD of the rear wing 90 (91W + 92W) can be substantially the same as the dimension of the widthwise WD of the front wing 80.

The dimension 90L of the anteroposterior LD from the rear end of the article to the lower edge 91 of the rear wing 90 is 25 to 35% (more preferably 28 to 32%) of the total length L of the article. This can be substantially the same as the dimension 80L of the anteroposterior LD from the front end of the article to the lower edge 81 of the front wing 80.

(Connecting part)
The rear wing 90 is provided with a connecting portion 13A that is detachably connected to the ventral portion F when worn. That is, when worn, the connecting portion 13A of the rear wing 90 is connected to the outer surface of the ventral portion F with both sides of the rear wing 90 superposed on at least the front wing 80 of the ventral portion F. As the connecting portion 13A, a hook material (male material) for a mechanical fastener (hook-and-loop fastener) may be provided, or an adhesive layer may be provided. The hook material has a large number of engaging protrusions on its connecting surface, and the shapes of the engaging protrusions are (A) -shaped, (B) J-shaped, (C) mushroom-shaped, and (D). There are T-shapes, (E) double J-shapes (shapes in which J-shapes are joined back to back), etc., but any shape may be used.

The connecting portion 13A can be directly attached to the rear wing 90, or a connecting tape 13 having the connecting portion 13A can be attached to the rear wing 90 as shown in the illustrated example. The structure of the connecting tape 13 is not particularly limited, but in the illustrated example, the tape mounting portion 13C fixed to the side flap SF, the tape main body portion 13B protruding from the tape mounting portion 13C, and the width direction of the tape main body portion 13B. It has a connecting portion 13A provided in the middle portion of the WD, and the tip side of the connecting portion 13A is a knob portion. As the sheet material forming the tape mounting portion 13C to the tape main body portion 13B, a non-woven fabric, a plastic film, a polylami non-woven fabric, paper, or a composite material thereof can be used.

The connecting portion of the connecting portion 13A on the outer surface of the ventral side portion F can be appropriately determined, and only the main body portion located between the left and right front wings 80 may be used as the connecting portion, or the main body portion may be connected. The range from the side portion to the base end side of the front wing 80 may be the connecting point. It is preferable that these connecting points facilitate the connection of the connecting portion 13A. For example, when the connecting portion 13A is a hook material (male material) of a mechanical fastener (hook-and-loop fastener), the connecting portion on the outer surface of the ventral portion F may be formed of a loop material (female material) or a non-woven fabric of the mechanical fastener. As a loop material, a plastic film sewn with a loop thread is also known, but a long fiber non-woven fabric having a continuous fiber direction of WD in the width direction (fineness 2.0 to 4.0 dtex, meshing 20 to 50 g / m). ^2. A spunbonded non-woven fabric having a thickness of about 0.3 to 0.5 mm) provided with a welded portion in which fibers are intermittently welded to each other at least in the width direction WD is preferable from the viewpoint of breathability and flexibility. When the region including the connecting portion on the outer surface of the ventral portion F is formed of the exterior nonwoven fabric 12 as in the illustrated example, the hook material can be connected to the exterior nonwoven fabric 12 without adding anything. If necessary, the loop material may be attached only to the connecting portion on the outer surface of the ventral portion F. Further, when the connecting portion 13A is an adhesive layer, a plastic film having a smooth surface and having a high adhesiveness can be attached to the connecting portion on the outer surface of the ventral portion F.

(Installation, etc.)
As shown in FIGS. 1 and 2, this tape-type disposable diaper has a shallow angle with respect to the widthwise WD of the lower edge of the front wing 80 and the lower edge of the rear wing 90, and its position is also closer to the waist side. As can be seen from the main parts of the mounted state of FIGS. 6 (b) and 9 (b), the leg opening LO extends toward the waist side with a wide width in the mounted state. Therefore, the wearer is likely to be in a good limb position, and in a good limb position, there is less pressure on the upper front surface of the thigh. Further, of the lower edge of the rear wing 90, the proximal end side is the first portion 91 along the width direction WD or a direction close thereto like the front wing 80, whereas the distal end side is separated from the leg opening LO. As can be seen from the wearing states of FIGS. 7 (a) and 10 (a), the portion 100 that is likely to touch the upper front surface of the thigh in a good limb position is the rear wing. Since the 90s do not overlap and consist only of the front wing 80, the flexibility is high. Therefore, even when the leg is slightly moved forward from the good limb position, the portion in contact with the upper front surface of the thigh is flexible and the load on the wearer's skin is low. Further, as can be seen from the mounted states of FIGS. 6 (b) and 9 (b) and the looser mounted states of FIGS. 7 (a) and 10 (a), the widthwise WD of the first portion 91. The second portion 92 does not form the edge of the leg opening LO even if the dimension adjustment in the waist circumference direction is performed within the range of the dimension of. Therefore, as shown in FIGS. 7 (b) and 10 (b), the corner portion changing from the first portion 91 to the second portion 92 forms the edge of the leg opening LO, or the front wing 80 and the second portion. A recess is formed at the edge of the leg opening LO by the portion 92, and the thigh portion is not greatly exposed.

Further, as in the example shown in FIGS. 8 and 9 (a), when the second portion 92 of the lower edge of the front wing 80 and the lower edge of the rear wing 90 has a wavy edge, when a force is applied. Yamabe 20 is easy to bend. Therefore, even when the leg is slightly moved forward from the good limb position, the portion in contact with the upper front surface of the thigh is more flexible, and the load on the wearer's skin is further reduced, which is preferable.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
-The "front-back direction" means the direction (vertical direction) indicated by the symbol LD in the figure, and the "width direction" means the direction (horizontal direction) indicated by WD in the figure, and the front-back direction and the width direction. Are orthogonal.

-"Curve" means not to include a straight line.

-"Unfolded state" means a state in which the unfolded state is flat without shrinkage or slack.

-"Elongation rate" means a value when the natural length is 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.

-"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt%) To 49.0 g, add 1.0 g of a highly absorbent polymer and stir with a stirrer. The produced gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I.techno Engineering).

・ "Metsuke" is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device in a standard state (test location: temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to bring it to a constant weight. Pre-drying refers to constant weight of a sample or test piece in an environment with a temperature of 100 ° C. For fibers with an official moisture content of 0.0%, pre-drying does not have to be performed. From the test piece in a constant weight state, a sample having a size of 100 mm × 100 mm is cut out using a sampling template (100 mm × 100 mm). The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is used as a basis weight.

-The "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression tester) under the conditions of a load of 0.098 N / cm ² and a pressurized area of 2 cm ² .

-"Water absorption" is measured by JIS K7223-1996 "Water absorption test method for highly water-absorbent resin".

-"Water absorption rate" is the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for highly water-absorbent resin" was performed using 2 g of highly absorbent polymer and 50 g of physiological saline. And.

-If there is no description of the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or device under standard conditions (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). do.

-Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

The present invention is applicable to the articulated disposable wearable articles such as the tape type disposable diapers of the above examples.

B ... dorsal part, EF ... end flap, F ... ventral part, L ... total length, LD ... front-back direction, LO ... leg opening, M ... middle part, SF ... side flap, WD ... width direction, 11 ... non-woven fabric Transparent sheet, 12 ... Exterior non-woven fabric, 13 ... Connecting tape, 13A ... Connecting part, 20 ... Mountain part, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... rising gather, 62 ... gather sheet, 64 ... side elastic member, 70 ... concave edge, 80 ... front wing, 90 ... rear wing, 91 ... first part, 92 ... second part.