JP7290959B2 - Articulated disposable wearing article - Google Patents

Description

The present invention relates to a connected disposable wearing article called a tape-type disposable diaper or the like.

A typical connectable disposable wearing article has a crotch portion including the center in the front-rear direction, an abdominal portion extending forward from the center in the front-rear direction, and a back portion extending rearward from the center in the front-rear direction. has wing portions extending from the crotch portion to the left and right sides in the width direction. In addition, a connecting tape (connecting tab) having a connecting portion that is detachably connected to the outer surface of the ventral portion is attached to the wing portion. In use, the wing portions are wrapped around the outer surface of the ventral portion from both sides of the waist to connect the connecting portion of the connecting tape to the outer surface of the ventral portion. Such an articulated disposable wearing article is used not only for infants but also for nursing care (adult use) (see Patent Document 1, for example).

Conventionally, the connecting tape is detachably connected to the base end portion fixed to the wing portion, the main body portion extending from the base end portion, and the ventral portion provided in the middle of the main body portion in the width direction. It is common to have a connecting portion and a non-connecting portion that is provided between the connecting portion and the base end and is not connected to the ventral portion.

Such articulated disposable wearing articles are widely used for nursing care (adult use) as well as for infants, but they have a problem that they tend to loosen around the waist and around the legs.

In order to solve this problem, a connected disposable wearing article has been proposed in which a connecting tape can be divided into upper and lower two stages by perforations (see Patent Document 1, for example). This connecting type disposable wearing article is connected by pulling the first connecting tape on the waist side obliquely downward to connect the waist circumference, and connecting by pulling the second connecting tape on the leg circumference side obliquely upward. It is possible to firmly tighten the circumference of the leg by this, and it is possible to obtain a wearing state with excellent fitting properties.

However, in the device described in Patent Document 1, the part that is divided into two upper and lower stages is limited to the connecting tape, so the first connecting tape on the waist side faces diagonally downward, and the second connecting tape on the leg circumference side faces diagonally upward. If you connect to each other, the wing part will have large wrinkles and the appearance will be bad.

In addition, in the case of Patent Document 1, the part that is divided into two upper and lower stages is limited to the connecting tape, so when trying to take advantage of that advantage, it is necessary to secure a certain amount of length in the width direction of the connecting tape. . However, the connecting tape is made of a relatively hard material in order to ensure sufficient strength and to facilitate cutting during manufacturing. There is also a problem that the hardness of the body has a great influence on the feeling of wearing.

Japanese Patent Application Laid-Open No. 2005-160506

Therefore, the main object of the present invention is to provide a connecting type disposable wearing article in which wrinkles formed in the wing portions are reduced while a tightly fitted state can be obtained by the upper and lower connecting tapes. It is in.

An articulated disposable wearing article that solves the above problems is as follows.
<First Aspect>
Having a crotch portion including the center in the front-rear direction, a ventral portion extending forward from the center in the front-rear direction, and a dorsal portion extending rearward from the center in the front-rear direction,
Having an absorber built in a range including the crotch part,
The dorsal portion has side flaps extending laterally beyond the side edges of the absorbent body,
The side flaps of the dorsal portion have wing portions that extend outward in the width direction from the crotch portion,
a connecting tape attached to the wing portion of the dorsal portion and detachably connected to the ventral portion;
a waist sheet provided over the left and right wing portions of the dorsal portion and having an elastic region that elastically expands and contracts in the width direction;
A portion of the waist sheet having a stretchable region elastically stretches in the width direction,
In the connected disposable wearing article,
As the connecting tapes, a first connecting tape provided on the waist side of the wing portion and a second connecting tape provided on the side of the wing portion around the leg,
The side flaps extend inward in the width direction from between the first connecting tape and the second connecting tape at the side edge of the wing portion so as to pass through the center of the elastic region of the waist sheet in the front-rear direction. having perforations extending to
At least part of the wing portion can be divided into upper and lower two stages by cutting off the perforations.
An articulated disposable wearing article characterized by:

(Effect)
In this connected disposable wearing article, at least a portion of the wing portion is divided into upper and lower tiers by cutting off the perforations, and the upper tier portion having the first connecting tape on the waist side is pulled diagonally downward and connected to connect the waist. While firmly tightening the circumference, the leg circumference can be firmly tightened by connecting the lower part having the second connecting tape on the leg circumference side while pulling it diagonally upward. In particular, the wing part, which is not divided conventionally, is divided into two stages, and it is possible to fit them independently around the waist and around the legs, so it is possible to obtain a tighter fit than the conventional one. is.

Since this connected disposable wearing article is divided into upper and lower two stages by providing perforations in the side flaps, the first connecting tape on the waist side is directed obliquely downward, and the second connecting tape on the leg circumference side. Even if the wing parts are connected obliquely upward, the wing parts are less likely to be wrinkled and the appearance is less likely to deteriorate.

Furthermore, in this connected disposable wearing article, the perforations that divide the side flaps extend so as to pass through the middle of the elastic region of the waist sheet in the front-rear direction. The portion and the lower portion each have a portion including the stretchable region of the waist sheet, and are stretchable in the width direction. Therefore, the fit around the waist and legs can be improved without adding stretchability to the connecting tape itself.

<Second Aspect>
The perforations are formed in a layer other than the waist sheet in the side flaps,
A slit or a notch is formed over the entire portion of the waist sheet along the perforations, excluding at least the side ends.
The articulated disposable wearing article of the first aspect.

(Effect)
The waist sheet preferably has a longer dimension in the width direction because it can improve elasticity around the waist. Further, the longer the perforations for dividing the side flaps, the longer the divided portion, which is preferable because the degree of freedom increases. However, if the perforations for dividing the side flaps are provided up to the portion overlapping the waist sheet, a stronger force is required to separate the perforations at the portion having the waist sheet. In other words, if the perforations of the side flaps are started to be separated from the side edge side, a stronger force than before is required after reaching the position overlapping the waist sheet, and there is room for improvement in terms of ease of separation.

On the other hand, in the present connected disposable wearing article, of the portions along the perforations in the waist sheet, the portions excluding at least the side end portions are entirely separated in advance, so that the perforations in the portion having the waist sheet are cut off in advance. The force required for separating the waist sheet is not added to the force required for separating. Therefore, even if perforations are formed up to the portion overlapping the waist sheet, the perforations of the side flaps can be easily separated up to the portion overlapping the waist sheet.

<Third Aspect>
Having a crotch portion including the center in the front-rear direction, a ventral portion extending forward from the center in the front-rear direction, and a dorsal portion extending rearward from the center in the front-rear direction,
Having an absorber built in a range including the crotch part,
The dorsal portion has side flaps extending laterally beyond the side edges of the absorbent body,
The side flaps of the dorsal portion have wing portions that extend outward in the width direction from the crotch portion,
a connecting tape attached to the wing portion of the dorsal portion and detachably connected to the ventral portion;
a waist sheet provided over the left and right wing portions of the dorsal portion and having an elastic region that elastically expands and contracts in the width direction;
A portion of the waist sheet having a stretchable region elastically stretches in the width direction,
In the connected disposable wearing article,
As the connecting tapes, a first connecting tape provided on the waist side of the wing portion and a second connecting tape provided on the side of the wing portion around the leg,
A plurality of the waist sheets are provided adjacent to or spaced apart in the front-rear direction,
The side flaps extend inward in the width direction from between the first connecting tape and the second connecting tape at the side edges of the wing portions so as to pass between the elastic regions of the adjacent waist sheets. An extending perforation is formed,
At least part of the wing portion can be divided into upper and lower two stages by cutting off the perforations.
An articulated disposable wearing article characterized by:

(Effect)
In this connected disposable wearing article, the perforations that divide the side flaps continue to pass between the elastic regions of the adjacent waist sheets, so the upper and lower parts of the side flaps formed by separating the perforations The parts each have a part including the stretchable region of the waist sheet, and are stretchable in the width direction. Therefore, the fit around the waist and legs can be improved without adding stretchability to the connecting tape itself.
In addition, in this connected disposable wearing article, a plurality of waist sheets are provided adjacent to each other or spaced apart in the front-rear direction, and perforations are formed so as to pass between the elastic regions of the adjacent waist sheets. The force required for separating the waist sheet is not added to the force required for separating the perforations of the portion having the waist sheet. Therefore, even if perforations are formed up to the portion overlapping the waist sheet, the perforations of the side flaps can be easily separated up to the portion overlapping the waist sheet.

<Fourth Aspect>
The widthwise dimension of the connecting tape is 1/7 to 1/2 times the widthwise dimension of the portion of the dorsal portion excluding the connecting tape,
An articulated disposable wearing article according to any one of aspects 1 to 3.

(Effect)
In the present connecting type disposable wearing article, perforations are formed in the side flaps, so that the dimension of the connecting tape in the width direction can be reduced. Therefore, in this connecting type disposable wearing article, the two-stage upper and lower connecting tapes provide a tight-fitting wearing state, while reducing the influence of the hardness of the connecting tapes on the feeling of wearing.

<Fifth Aspect>
In the perforations, the width of the tie portion of the first portion located laterally of the middle in the width direction is wider than the width of the tie portion of the second portion located inward in the width direction of the first portion.
An articulated disposable wearing article according to any one of aspects 1 to 4.

(Effect)
In this way, if the first portion is difficult to tear up to a certain extent from the start of tearing, and the second portion is easy to tear after that, the perforations may be unintentionally cut off when the perforations are used without being cut off. becomes difficult.

According to the present invention, it is possible to provide a tightly fitted mounting state by means of the upper and lower connecting tapes, and at the same time, it is possible to reduce wrinkles formed in the wing portions.

Fig. 2 is a plan view showing the inner surface of the articulated disposable wearing article in an unfolded state; 1 is a plan view showing the outer surface of an articulated disposable wearing article in an unfolded state; FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 1; FIG. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 1; (a) A cross-sectional view taken along line 8-8 of FIG. 1, and (b) a cross-sectional view taken along line 9-9 of FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1; FIG. It is the (a) top view of a waist sheet, and (b) (c) sectional drawing. It is a perspective view which shows a mounting state. FIG. 10 is an enlarged plan view showing the wing portion in a deployed state; FIG. 10 is an enlarged plan view showing the wing portion in a deployed state; FIG. 10 is an enlarged plan view showing the wing portion in a deployed state; FIG. 10 is an enlarged plan view showing the wing portion in a deployed state; It is a top view of a waist seat. 1 is a plan view showing the outer surface of an articulated disposable wearing article in an unfolded state; FIG.

FIGS. 1 to 6 show an example of a connecting type disposable wearing article, in which the symbol X indicates the total width of the diaper excluding the connecting tape, the symbol L indicates the total length of the diaper, and is a cross-sectional view. The dot pattern portion in 3 indicates a hot-melt adhesive as a bonding means for bonding each component located on the front side and the back side. The hot melt adhesive is applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). can be applied. Alternatively or additionally, at the fixing 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. Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester-polyamide-based adhesives, and can be used without particular limitation. As a joining means for joining each constituent member, a means by material welding such as heat sealing or ultrasonic sealing can be used.

This connected disposable wearing article has a crotch portion M including the center in the front-rear direction LD, an abdominal portion F extending forward from the center in the front-rear direction LD, and a back portion B extending rearward from the center in the front-rear direction LD. have. In addition, this connecting type disposable wearing article includes an absorbent body 56 built in a range including the crotch region M, a liquid permeable top sheet 30 covering the front side of the absorbent body 56, and a liquid impermeable top sheet 30 covering the back side of the absorbent body 56. It has a permeable sheet 11 and an exterior nonwoven fabric 12 that covers the back side of the liquid-impermeable sheet and constitutes the outer surface of the product.

The materials and characteristic parts of each part will be described in order below.
(Absorber)
The absorbent body 56 is a part that absorbs and retains the excreted fluid, and can be formed by an assembly of fibers. The filament assembly may be a filament assembly obtained by laminating short fibers such as cotton pulp or synthetic fibers, or by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber basis weight can be, for example, about 100 to 300 g/m ² when piling up cotton-like pulp or short fibers, and for example, about 30 to 120 g/m ² for filament aggregates. can be done. The fineness of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, more preferably 1 to 5 dtex. In the case of a filament assembly, the filaments may be non-crimped fibers, but crimped fibers are preferred. The degree of crimping of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, more preferably 15 to 50 per 2.54 cm. Further, uniformly crimped crimped fibers can be used.

(superabsorbent polymer particles)
Absorbent body 56 may contain superabsorbent polymer particles in part or in its entirety. Superabsorbent polymer particles include "powder" in addition to "particles". As the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are. Although the particle size of the superabsorbent polymer particles is not particularly limited, for example, sieving using a 500 μm standard sieve (JIS Z8801-1: 2006) (shaking for 5 minutes), and particles falling under the sieve in this sieving When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the percentage 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.

Materials for the superabsorbent polymer particles may be used without any particular limitation, but those having a water absorption of 40 g/g or more are suitable. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles. and acrylic acid (salt) polymers can be used. As for the shape of the superabsorbent polymer particles, the powder particles that are commonly used are suitable, but other shapes can also be used.

As the superabsorbent 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, the liquid supplied into the absorbent body 56 tends to return to the outside of the absorbent body 56, which is called reversion.

As the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the absorbent body 56 is bulky, it is possible to effectively suppress the feeling of stickiness after liquid absorption.

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

(packaging sheet)
In order to prevent the superabsorbent polymer particles from slipping out or to improve the shape retention of the absorbent body 56, the absorbent body 56 can be incorporated as an absorbent element 50 wrapped with a wrapping sheet 58. FIG. As the wrapping sheet 58, tissue paper, especially crepe paper, nonwoven fabric, poly-laminated nonwoven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the sheet is such that the superabsorbent polymer particles do not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMMS (spunbond/meltblown/meltblown/spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene/polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

As shown in FIG. 3, the packaging sheet 58 may have a structure that wraps the entire absorber 56 with one sheet, or may wrap the entire absorber 56 with a plurality of sheets, such as two upper and lower sheets . The packaging sheet 58 can also be omitted.

(top sheet)
The top sheet 30 is liquid-permeable, and may be, for example, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like.

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 absorbent body 56 in the width direction WD. 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 may be made shorter than the total width of the absorbent body 56, and other suitable modifications may be made.

(intermediate sheet)
An intermediate sheet (also called a “second sheet”) 40 can be provided on the back side of the topsheet 30 to prevent liquid that has permeated the topsheet 30 from flowing back. The intermediate sheet 40 can also be omitted.

As the intermediate sheet 40, various nonwoven fabrics can be suitably used, and particularly bulky air-through nonwoven fabrics can be suitably used. Composite fibers having a core-sheath structure are preferably used 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 17-80 g/m ² , more preferably 25-60 g/m ² . The thickness of the raw fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is also preferable to use eccentric fibers, hollow fibers, or eccentric and hollow fibers whose core is not in the center as mixed fibers of all or part of the raw material fibers.

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

(liquid-impermeable sheet)
The liquid-impermeable sheet 11 is not particularly limited, but preferably has moisture permeability. As the liquid-impermeable sheet 11, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, the sheet is molded, and then the sheet is stretched in a uniaxial or biaxial direction. A sheet can be preferably used. Moreover, as the liquid-impermeable sheet 11, a non-woven fabric as a base material with improved waterproofness can also be used.

It is desirable that the liquid-impermeable sheet 11 extends in the same or wider range than the absorbent body 56 in the front-rear direction LD and the width direction WD. A structure in which the end portions of the absorber 56 are not covered in the front-rear direction LD and the width direction WD may also be employed.

(exterior non-woven fabric)
The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 to give the outer surface of the product a cloth-like appearance. The non-woven fabric can be used singly or in multiple layers. In the latter case, it is preferable to bond the nonwoven fabrics together with a hot-melt adhesive or the like. When a nonwoven fabric is used, it is preferable that the nonwoven fabric has a fineness of 1.0 to 3.5 dtex, a basis weight of 10 to 50 g/m ² and a thickness of 1 mm or less.

(Getting up gathers)
On both sides of the top sheet 30 in the width direction WD, rise gathers 60 standing up toward the wearer's skin are provided in order to prevent excrement from moving laterally along the top sheet 30 and prevent so-called side leakage. preferably. Of course, the rising gathers 60 can be omitted.

When adopting the rising gathers 60, the structure is not particularly limited, and any known structure can be adopted. The rising gathers 60 of the illustrated example include a base portion 65 fixed to an area including the side flaps, a body portion 66 extending from the base portion, and both ends of the body portion 66 in the front-rear direction fixed in a laid down state. A gathered sheet 62 having a portion 67 and a non-fixed raised portion 68 positioned between the front and rear fallen portions 67 of the body portion 66, and a gathered elastic member 63 fixed to at least the tip of the raised portion 68. It has become. A water-repellent nonwoven fabric can be used as the gather sheet 62, and thread rubber or the like can be used as the gather elastic member 63. As shown in FIG. The gather elastic member 63 may be provided in plural numbers as shown in FIGS. 1 and 2, or may be provided in a single form.

The inner surface of the gather sheet 62 has a joining start edge in the width direction WD on the side of the top sheet 30, and the portion outside the joining edge in the width direction is the inner surface of each side flap SF, that is, the illustrated example is liquid-impermeable. The side portions of the sheet 11 and the side portions of the exterior nonwoven fabric 12 located on the widthwise outer side thereof are joined with a hot-melt adhesive or the like.

Around the legs, the width direction inner side from the joining start end of the rising gathers 60 is fixed on the top sheet 30 at both ends in the front and back direction of the product, but the portion in between is a non-fixed free portion. It rises due to the contractile force of the elastic member 63 and comes to adhere to the surface of the body.

(end flap, side flap)
The connected disposable wearing article of the illustrated example has a pair of end flaps EF without the absorbent body 56 extending to the front side and the rear side of the absorbent body 56 respectively, It has a pair of side flaps SF which do not have the absorber 56, respectively extending. The side flaps SF may be made of a material (exterior nonwoven fabric 12 or the like) that continues from the portion having the absorber 56, as shown in the figure, or may be formed by attaching another material.

(flat gather)
A side elastic member 64 made of an elongated elastic member such as rubber thread is fixed to each side flap SF while being stretched in the front-rear direction LD. Configured as a gather. As in the illustrated example, the side elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable sheet 11 on the outside in the width direction near the joining start end of the joining portion of the gather sheet 62, and in the side flap SF It can also be provided between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12 . A plurality of side elastic members 64 may be provided on each side as in the illustrated example, or only one may be provided on each side.

The planar gathers are portions on which the contractile force of the side elastic members 64 acts (portions where the side elastic members 64 are illustrated in the drawing). Therefore, in addition to the form in which the side elastic members 64 are present only in the planar gathers, the side elastic members 64 are present on the front side, the rear side, or both sides of the planar gathers, but the side elastic members 64 are present in areas other than the planar gathers. If the member is finely cut at one point or multiple points, or is not fixed to the sheet sandwiching the side elastic member 64, or both, the contractile force will not act on the part other than the planar gather. Also included is a structure in which the contractile force of the side elastic members 64 acts only on the plane gathers instead (substantially equivalent to not providing an elastic member).

(Wing part)
In this connected disposable wearing article, the back portion B has a wing portion WP that extends outward in the width direction WD from the crotch portion M. As shown in FIG. Similarly, the ventral portion F also has a wing portion WP extending outward in the width direction WD from the crotch portion M. These wing portions WP can also be formed of a member different from the other portions. However, in the structure having the side flaps SF as in the illustrated example, by cutting the middle of the front-rear direction LD at the side portion of the side flap SF, the recessed edge 70 from the side edge of the crotch portion M to the lower edge 71 of the wing portion is formed. is formed, and as a result, the wing portions WP are formed, which is preferable for ease of manufacture.

(connecting tape)
As shown in FIGS. 1, 2 and 6, the wing portions WP of the dorsal portion B are provided with connecting tapes 80A and 80B that are detachably connected to the outer surface of the ventral portion F, respectively. . When wearing the diaper 10, the connecting tapes 80A, 80B are wrapped around the outer surface of the abdominal portion F from both sides of the waist, and the connecting portions 83 of the connecting tapes 80A, 80B are connected to the outer surface of the abdominal portion F at appropriate locations.

As shown in FIGS. 6 and 7, the connecting tapes 80A and 80B include a base end portion 81 fixed to the wing portion WP and a sheet base material 80S forming a main body portion 82 extending from the base end portion 81; The sheet base material 80S has a connecting portion 83 for the ventral side portion F provided in the middle portion of the body portion 82 in the width direction WD. A non-connecting portion 84 that is not connected to the ventral portion F is formed on the base end portion 81 side of the connecting portion 83 of the main body portion 82 , and a knob portion 85 is formed on the opposite side. The non-connecting portion 84 and the knob portion 85 are composed only of the sheet base material 80S forming the main body portion 82. As shown in FIG. The side edges of the base end portion 81 may coincide with the side edges of the wing portions WP, or may be slightly spaced inward in the width direction WD from the side edges of the wing portions WP as shown in FIG. good too. This separation distance can be about 10 to 50 mm. The inner edge in the width direction of the connecting portion 83 may coincide with the side edge of the wing portion WP, but as shown in FIG. Preferably, they are spaced apart. This separation distance can be about 1 to 100 mm.

As the connecting portion 83, a hook material (male material) of a mechanical fastener (surface fastener) may be provided, or an adhesive layer may be provided. The hook material has a large number of engaging projections on its connection surface, and the shapes of the engaging projections are (A) square-shaped, (B) J-shaped, (C) mushroom-shaped, and (D). Although there are a T shape, (E) a double J shape (a shape in which two J shapes are joined back to back), and the like, any shape may be used.

Further, as the sheet base material 80S forming the base end portion 81 to the main body portion 82, nonwoven fabric, plastic film, poly-laminated nonwoven fabric, paper, or a composite material thereof can be used. , a basis weight of 60 to 100 g/m ² and a thickness of 1 mm or less.

The connecting tapes 80A and 80B may be one in which at least a part of the non-connecting portion 84 is stretchable in the width direction WD, or the whole of which is not stretchable.

(Target part)
A target portion 20 is provided at a connecting portion of the connecting tapes 80A and 80B in the ventral portion F. As shown in FIG. The target portion 20 can be provided by attaching a sheet material to the outer surface of the ventral portion F to facilitate connection, as shown in the illustrated example.

The sheet material for forming the target portion 20 is not particularly limited. Non-woven fabrics can be used.

When the connecting portion 83 is made of a hook material, as a sheet material for forming the target portion 20, a large number of loop threads that engage the engaging projections of the hook material are sewn on the surface of the base material made of plastic film or non-woven fabric. A laminated composite sheet material can be used.

Furthermore, when the connecting portion 83 is a hook material and the connecting portion of the connecting tapes 80A and 80B in the ventral portion F is made of nonwoven fabric (for example, when the exterior nonwoven fabric 12 is provided as in the illustrated example), the target portion 20 is Instead of adding a sheet material to form the target portion 20, a suitable portion of the exterior nonwoven fabric 12 can be used as the target portion 20, and the hook material can be entangled with the fibers of the exterior nonwoven fabric 12 and connected.

On the other hand, when the connecting portion 83 is an adhesive layer, the sheet material for forming the target portion 20 is a sheet material made of a plastic film with a smooth surface that is highly adhesive, and the surface of the sheet material is subjected to release treatment. can use things.

(waist seat)
A waist sheet 17 having a stretchable region 17e elastically stretchable in the width direction WD is attached between the left and right connecting tapes 80A and 80B in the back portion B, and the portion of the waist sheet 17 having the stretchable region 17e is stretchable in the width direction WD It is preferable that it is elastically stretchable. The waist sheet 17 may be positioned only on the end flaps EF, but if it is arranged from the end flaps EF to the rear end of the absorber 56 as in the illustrated example, the rear end of the absorber 56 is It is preferable because it is firmly pressed against the body.

The waist sheet 17 may be made of a sheet-like elastic member such as a rubber sheet, but preferably has air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric may be used, but as shown in FIGS. It is preferable that the support layers 18 are bonded together with an agent, and an elastic member 19 such as a perforated sheet, mesh, or elongated (thread-like or string-like) elastic member 19 is fixed in an extended state along the width direction WD between the support layers 18. used for As the material of the support layer 18 in this case, the same material as the exterior nonwoven fabric 12 can be used. It is preferable that the elongation rate of the elastic member 19 is about 150 to 250%. When an elongated (thread-like or string-like) elastic member 19 is used, it is preferable to provide about 5 to 15 elastic members having a thickness of 420 to 1120 dtex at intervals 19d of 3 to 10 mm.

The waist sheet 17 preferably has a longer dimension in the width direction WD because it can improve elasticity around the waist. Although the width of the waist sheet 17 can be determined as appropriate, it is preferable that the width extends between the left and right side flaps SF as shown in the illustrated example. As for specific dimensions, the width of the waist sheet 17 is preferably about 80 to 95% of the total width X of the body portion excluding the connecting tapes 80A and 80B. Both ends of the waist sheet 17 may be located inside the base ends 81 of the connecting tapes 80A and 80B as shown in FIG. It may overlap with the base end portion 81 .

Both ends of the waist sheet 17 in the width direction WD may be non-stretchable regions 17n for holding and attaching by suction during manufacturing. The dimensions of the non-stretchable regions 17n and the dimensions of the stretchable regions 17e positioned between them and stretchable in the width direction WD can be determined as appropriate. The width of the non-stretchable region 17n is preferably 45 to 90% of the width between the connecting portions 83, and the width of the non-stretchable region 17n is preferably about 5 to 50 mm in order to prevent shrinkage and curling during manufacturing. The non-stretchable region 17n may be a region without the elastic member 19. However, the elastic member 19 is attached to the stretchable region 17e and the non-stretchable region 17n, and the elastic member 19 is cut in the non-stretchable region 17n. A structure may be adopted in which the elastic member 19 remains at 17n but hardly or not expands or contracts at all.

Alternatively, the elastic member 19 may be arranged so that part of the elastic member 19 traverses the absorbent body 56. However, as shown in FIG. Therefore, if the elastic member 19 remains but has little or no expansion/contraction structure, the rear end portion of the absorbent body 56 does not contract in the width direction, so that the fitting property is further improved.

Although the waist sheet 17 is arranged between the liquid-impermeable sheet 11 and the absorbent element 50 in the illustrated example, it is not particularly limited to this arrangement in the thickness direction. For example, the waist sheet 17 may be arranged between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12 , or may be provided outside the exterior nonwoven fabric 12 .

(Perforation)
As shown in an enlarged view in FIG. 9, this connected disposable wearing article includes a first connecting tape 80A provided on the waist side (rear side) side of the wing portion WP, and a leg circumference side of the wing portion WP ( and a second connecting tape 80B provided on the side of the front side). The side flaps SF extend inward in the width direction WD from between the first connecting tape 80A and the second connecting tape 80B at the side edge of the wing portion WP, and extend in the front-rear direction LD of the elastic region 17e of the waist sheet 17. has a perforation 90 extending through the middle of the

In use, the connecting type disposable wearing article has at least a part of the wing portion WP divided into upper and lower two stages by cutting off the perforations 90, and has a first connecting tape 80A on the waist side as shown in FIG. The upper part UP is pulled obliquely downward and connected to tightly tighten the waist circumference, and the lower part LP having the second connecting tape 80B on the leg circumference side is pulled obliquely upward and connected to firmly tighten the leg circumference. can be tightened. In particular, the wing portion WP, which is not divided conventionally, is divided into two stages, and each can be fitted independently around the waist and around the legs, so a tighter fitted state than the conventional one can be obtained. It is. The connection positions of the first connection tape 80A and the second connection tape 80B can be appropriately determined by the user, and as shown in FIG. 83 may be prevented from overlapping each other, or as shown in FIG. , the connecting portions 83 may partially overlap each other. Also, the perforations 90 can be used without being cut off if necessary.

Moreover, since this connected disposable wearing article is divided into upper and lower two stages by providing perforations 90 in the side flaps SF, the first connecting tape 80A on the waist side is directed obliquely downward and the second connecting tape 80A on the leg circumference side. Even if the two connecting tapes 80B are connected obliquely upward, the wing portions WP are less likely to be wrinkled, and the appearance is less likely to deteriorate.

Furthermore, in the connected disposable wearing article, the perforations 90 that divide the side flaps SF extend so as to pass through the middle of the stretchable region 17e of the waist sheet 17 in the front-rear direction LD. The upper portion UP and the lower portion LP of the side flaps SF each have a portion including the stretchable region 17e of the waist sheet 17, and are stretchable in the width direction WD. Therefore, even if the connecting tapes 80A and 80B themselves are not stretchable, the fit around the waist and legs can be improved.

In this connected disposable wearing article, the perforations 90 are formed in the side flaps SF, so that the dimension 80w in the width direction WD of the connecting tapes 80A and 80B can be kept short. For example, the dimension 80w in the width direction WD of the connecting tapes 80A and 80B can be 1/7 to 1/2 times the dimension X in the width direction WD of the portion of the dorsal portion B excluding the connecting tapes 80A and 80B. . As a result, in this connecting type disposable wearing article, a tightly fitted state can be obtained by the upper and lower connecting tapes 80A and 80B, and the effect of the hardness of the connecting tapes 80A and 80B on the feeling of wearing is reduced. can do. The dimension of the connecting tapes 80A and 80B in the front-rear direction LD can be determined as appropriate, but can be, for example, less than 1/2 of the dimension in the front-rear direction LD of the side edges of the wing portions WP.

The first connecting tape 80A and the second connecting tape 80B may have the same size and shape as in the illustrated example, or may differ in at least one of the size and shape. The first connecting tape 80A and the second connecting tape 80B may be attached to the waist side or the leg circumference side of the wing portion WP in a biased manner. It is preferable that the first connecting tape 80A is attached to the wing portion WP, and the second connecting tape 80B is attached to the leg circumference side from the center portion of the wing portion WP in the front-rear direction LD. In order to form the perforations 90 between the first connecting tape 80A and the second connecting tape 80B, the first connecting tape 80A and the second connecting tape 80B have a sufficient gap, for example, a gap of 15 mm or more in the front-rear direction LD. Although it is preferable that they are adjacent to each other, they may be adjacent as long as the perforations 90 can be formed.

The perforations 90 are positioned in the longitudinal direction LD between the first connecting tape 80A and the second connecting tape 80B. It may be biased toward the connecting tape 80B side. Normally, the perforations 90 are preferably positioned within a range of ±5 mm in the front-rear direction LD with the center of the wing portion WP in the front-rear direction LD as a reference.

The longer the perforations 90 for dividing the side flaps SF, the longer the divided portions UP and LP, which is preferable because the degree of freedom increases. The dimension of the perforations 90 in the width direction WD can be determined appropriately, but is preferably 15 mm or more, particularly preferably 40 mm or more. Moreover, as shown in FIGS. 6 and 7 , it is preferable that the wrapping ends of the perforations 90 are located laterally from the side edges of the top sheet 30 and the liquid-impermeable sheet 11 .

The widthwise dimension WD of the overlapping portion between the perforations 90 and the waist sheet 17 can be appropriately determined, but is preferably 5 mm or more, particularly preferably 15 mm or more.

The number of perforations 90 may be one as in the illustrated example, or a plurality of perforations. 12, the perforation 90 may branch into a portion extending obliquely upward and a portion extending obliquely downward in the middle of the width direction WD.

The shape of the cut portion (notch) in the perforation 90, the length ratio between the cut portion and the tie portion (connecting portion between the cut portions), and the like can be appropriately determined. As shown in FIG. 10, the width of the tie portion 91t of the first portion 91 located laterally of the middle in the width direction WD of the perforation 90 is adjusted to the width of the tie portion 91t located inward of the first portion 91 in the width direction WD. Making the width of the tie portion 92t of the two portions 92 wider than that of the tie portion 92t is one preferred example. The tie portion is a non-cut portion between the adjacent cut portions 91c and 92c, and the width thereof is equal to the interval between the adjacent cut portions 91c and 92c. In this way, if the first part 91 is hard to tear up to a certain extent from the beginning of tearing and the second part 92 is easy to tear after that, the perforations 90 are unintentionally cut off when the perforations 90 are used without being cut off. Situations are less likely to occur.

If the perforations 90 for dividing the side flaps SF are provided up to the portion overlapping the waist sheet 17, a stronger force is required to separate the perforations 90 at the portion having the waist sheet 17.例文帳に追加In other words, when the perforations 90 of the side flaps SF are separated from the side edge side, a stronger force than before is required after reaching the position overlapping the waist sheet 17, and there is room for improvement in terms of ease of separation. be. Therefore, it is preferable that the perforations 90 are provided on the waist sheet 17 other than the waist sheet 17, and the slits 17s or the notches 17c are formed over the entire portion of the waist sheet 17 along the perforations 90, as shown in the illustrated example. As a result, in the connected disposable wearing article, the entire portion of the waistsheet 17 along the perforations 90 is cut off in advance, so that the force required to cut off the perforations 90 of the portion having the waistsheet 17 does not exceed the weight of the waistsheet. The force required to separate 17 is not applied. Therefore, even if the perforations 90 are formed up to the portion overlapping the waist sheet 17 , the perforations 90 of the side flaps SF can be easily separated up to the portion overlapping the waist sheet 17 . Of course, the waist sheet 17 may not have the slit 17s or the notch 17c.

Providing the notch 17c as in the example shown in FIGS. 9 to 12 has the advantage that even if the position of the perforation 90 in the front-rear direction LD deviates slightly, the easiness of separation is not affected. Although the maximum dimension of the notch 17c in the front-rear direction LD can be determined as appropriate, it is preferably about 0.5 to 40 mm. On the other hand, providing a slit 17s (linear cut portion) as in the example shown in FIG. 13(a) has the advantage of not generating a trim (excised piece to be discarded). As long as the slit 17 s is along the perforation 90 , the slit 17 s may either completely overlap the perforation 90 or be adjacent to either the front or rear of the perforation 90 . As in the example shown in FIG. 13(b), of the portion along the perforation 90 in the waist sheet 17, the side end portion is left as a continuous portion 17t, and the slit 17s (notch 17c may be used) extending over the entire other portion. ) is preferable because the portion having the slit 17s of the waist sheet 17 is less likely to be rolled up during manufacturing. The width of the continuous portion 17t can be the same as that of the tie portion of the perforations 90. As shown in FIG. Even if the slit 17s of the waist sheet 17 has such a continuous portion 17t, since it is only the side end portion, the perforations 90 can be separated easily.

The inner end of the slit 17s or notch 17c may be positioned substantially at the same position as the inner end of the perforation 90, or may be positioned further inward than the inner end of the perforation 90 as shown in FIG. good.

As shown in FIG. 14, a plurality of waist sheets 17 are provided adjacent to each other in the front-rear direction LD or spaced apart (for example, about 3 to 15 mm), and perforations 90 pass between the elastic regions 17e of the adjacent waist sheets 17. It may be extended as Even with this structure, the force required for separating the waist sheet 17 is not added to the force required for separating the perforations 90 of the portion having the waist sheet 17 . Therefore, even if the perforations 90 are formed up to the portion overlapping the waist sheet 17 , the perforations 90 of the side flaps SF can be easily separated up to the portion overlapping the waist sheet 17 .

(non-woven fabric)
As the nonwoven fabric in the above description, a known nonwoven fabric can be appropriately used depending on the site and purpose. Constituent fibers of non-woven fabrics include, for example, synthetic fibers such as olefin-based, polyester-based, and polyamide-based fibers such as polyethylene or polypropylene (including composite fibers such as core-sheath fibers in addition to single-component fibers), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, etc., can be selected without particular limitation, and these can also be mixed and used. In order to increase the softness of the nonwoven fabric, it is preferable to use crimped fibers as the constituent fibers. In addition, even if the constituent fibers of the nonwoven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilic agent), they may be hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent). including). In addition, nonwoven fabrics are generally classified into short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bonded (air-through) nonwoven fabrics, and needle punched nonwoven fabrics, depending on the fiber length, sheet forming method, fiber bonding method, and laminate structure. Nonwoven fabrics are classified into nonwoven fabrics, point-bonded nonwoven fabrics, laminated nonwoven fabrics (such as SMS nonwoven fabrics and SMMS nonwoven fabrics in which a meltblown layer is sandwiched between spunbond layers), and any of these nonwoven fabrics can be used.

<Description of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

・"Front-back direction" means the direction (longitudinal direction) indicated by symbol LD in the figure, and "width direction" means the direction (left-right direction) indicated by WD in the figure. are orthogonal.

- "Unfolded state" means a flat unfolded state without contraction or slack.

- "Elongation rate" means a value when the natural length is taken as 100%. 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 deionized water: 97.09 wt%) 1.0 g of superabsorbent polymer is added to 49.0 g and stirred with a stirrer. The resulting gel is left in a thermo-hygrostat at 40° C. and 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).

- "Matsuke" is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1° C., relative humidity 50±2%) to a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.

- "Thickness" is automatically measured using an automatic thickness gauge (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 .

・The “water absorption” is measured according to JIS K7223-1996 “Testing method for water absorption of super absorbent polymer”.

・"Water absorption rate" is "Time to end point" when JIS K7224-1996 "Test method for water absorption rate of superabsorbent polymer" is performed using 2g of superabsorbent polymer and 50g of physiological saline. and

・If there is no description about environmental conditions for testing and measurement, the test and measurement shall be performed in a laboratory or equipment 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.

INDUSTRIAL APPLICABILITY The present invention can be applied to an articulated disposable wearing article such as the above example.

B... dorsal part, F... ventral part, LD... longitudinal direction, LP... lower part, M... crotch part, SF... side flap, UP... upper part, WD... width direction, WP... wing part, 11... liquid Impermeable sheet 12 Exterior nonwoven fabric 17 Waist sheet 17e Elastic region 17c Notch 17s Slit 20 Target part 30 Top sheet 40 Intermediate sheet 50 Absorbent element 56 Absorber 58 Wrapping sheet 60 Raise gather 62 Gather sheet 64 Side elastic member 70 Concave edge 71 Lower edge of wing portion 80A, 80B Connection tape 80A First connection Tape, 80B... Second connection tape, 81... Base end portion, 82... Body portion, 83... Connection portion, 90... Perforation, 91... First portion, 92... Second portion.

Claims (4)

Having a crotch portion including the center in the front-rear direction, a ventral portion extending forward from the center in the front-rear direction, and a dorsal portion extending rearward from the center in the front-rear direction,
Having an absorber built in a range including the crotch part,
The dorsal portion has side flaps extending laterally beyond the side edges of the absorbent body,
The side flaps of the dorsal portion have wing portions that extend outward in the width direction from the crotch portion,
a connecting tape attached to the wing portion of the dorsal portion and detachably connected to the ventral portion;
a waist sheet provided over the left and right wing portions of the dorsal portion and having an elastic region that elastically expands and contracts in the width direction;
A portion of the waist sheet having a stretchable region elastically stretches in the width direction,
In the connected disposable wearing article,
The connecting tapes include a first connecting tape provided on the waist side of the wing and a second connecting tape provided on the side of the wing around the leg,
The side flaps extend inward in the width direction from between the first connecting tape and the second connecting tape at the side edge of the wing portion so as to pass through the center of the elastic region of the waist sheet in the front-rear direction. having perforations extending to
At least part of the wing portion can be divided into upper and lower two stages by cutting the perforations,
The perforations are formed in a layer other than the waist sheet in the side flaps,
A slit or a notch is formed over the entire portion of the waist sheet along the perforations, excluding at least the side ends.
An articulated disposable wearing article characterized by: Having a crotch portion including the center in the front-rear direction, a ventral portion extending forward from the center in the front-rear direction, and a dorsal portion extending rearward from the center in the front-rear direction,
Having an absorber built in a range including the crotch part,
The dorsal portion has side flaps extending laterally beyond the side edges of the absorbent body,
The side flaps of the dorsal portion have wing portions that extend outward in the width direction from the crotch portion,
a connecting tape attached to the wing portion of the dorsal portion and detachably connected to the ventral portion;
a waist sheet provided over the left and right wing portions of the dorsal portion and having an elastic region that elastically expands and contracts in the width direction;
A portion of the waist sheet having a stretchable region elastically stretches in the width direction,
In the connected disposable wearing article,
As the connecting tapes, a first connecting tape provided on the waist side of the wing portion and a second connecting tape provided on the side of the wing portion around the leg,
A plurality of the waist sheets are provided adjacent to or spaced apart in the front-rear direction,
The side flaps extend inward in the width direction from between the first connecting tape and the second connecting tape at the side edges of the wing portions so as to pass between the elastic regions of the adjacent waist sheets. An extending perforation is formed,
At least part of the wing portion can be divided into upper and lower two stages by cutting off the perforations.
An articulated disposable wearing article characterized by: The widthwise dimension of the connecting tape is 1/7 to 1/2 times the widthwise dimension of the portion of the dorsal portion excluding the connecting tape,
The connectable disposable wearing article according to claim 1 or 2 . In the perforations, the width of the tie portion of the first portion located laterally of the middle in the width direction is wider than the width of the tie portion of the second portion located inward in the width direction of the first portion.
The connectable disposable wearing article according to any one of claims 1 to 3 .

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