JP7274286B2 - 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). In this connectable disposable wearing article, the upper section on the waist side is pulled diagonally downward and connected to tightly tighten the waist area, and the lower section on the leg circumference side is pulled diagonally upward and connected to connect the leg circumference. It can be tightened firmly, and a wearing state with excellent fit can be obtained.

However, since the connecting tape is made of a strong material such as long-fiber nonwoven fabric, it is difficult to separate it with normal perforations.

Japanese Patent Application Laid-Open No. 2005-160506

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to facilitate the separation of perforations in a connected disposable wearing article having a connecting tape that can be divided into two upper and lower sections by perforations.

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 a side flap portion extending laterally of the absorbent body,
having a connecting tape attached to the side flap portion of the dorsal portion and detachably connected to the ventral portion;
The connecting tape includes a base end portion fixed to the side flap portion, a main body portion extending from the base end portion, and a waist-side side portion of the main body portion provided on a side portion on the waist side for the abdominal portion. 1 connection part, and a second connection part for the ventral part provided on the side part of the main body part around the leg,
The connecting tape can be divided into upper and lower two stages at a dividing portion extending inward in the width direction from between the first connecting portion and the second connecting portion at the side edge of the connecting tape.
In the connected disposable wearing article,
The split portion includes a perforation extending inward in the width direction from a side edge of the connecting tape, and a slit extending from a position adjacent to the inner end in the width direction of the perforation to the inner end of the split portion. or has a hole,
The length of the perforations in the width direction is 25 mm or less,
An articulated disposable wearing article characterized by:

(Effect)
In this connecting type disposable wearing article, it is possible to connect by simply grasping both sides of a short perforation of 25 mm or less with both hands, separating the perforation from the side edge side of the connecting tape with a small movement such as turning the wrist, and connecting it to a slit or hole. The tape can be divided into upper and lower two stages longer than the perforations. In other words, as compared with the conventional method in which the whole is perforated, it is possible to more easily finish the work of separating the perforations and divide the connecting tape into upper and lower two stages. Moreover, the perforations are located on the side edges of the connecting tape, and the slits or holes are located further inward in the width direction than the perforations. This has the advantage of facilitating the handling of the tape, and provides a high degree of integrity of the connecting tape when the user chooses to use the connecting tape without dividing it into upper and lower halves.

In this connecting type disposable wearing article, it is also possible to cut off perforations from the inner side to the outer side in the width direction by inserting a finger into the slit of the connecting tape. If the perforations are cut from the side edges of the connecting tape, there is a risk that the connecting tape will be torn further inward than the inner end of the slit or hole in the width direction after the perforations are cut off ( Hereinafter, it is also referred to as tearing too much). On the other hand, if the finger is inserted into the slit as described above and the perforations are cut from the inner side to the outer side in the width direction, excessive tearing does not occur.

When wearing, the upper portion having the first connecting portion on the waist side is pulled diagonally downward to connect, thereby firmly tightening the waist area, while the lower portion having the second connecting portion on the leg side is pulled diagonally upward. The legs can be tightly tightened by connecting them together.

In addition, the term "slit" is a part separated by making a cut in the target part, and has a length in an unfolded state but does not have a dimension in a direction perpendicular to the longitudinal direction, and is substantially It has no area. Moreover, the term "hole" is formed by punching out a target portion, and has both longitudinal and widthwise dimensions and an area in a developed state.

<Second Aspect>
The length of the perforations in the width direction is 10 to 25 mm,
The widthwise dimension of the slit or hole is 0.7 to 1 times the widthwise dimension of the perforation,
The articulated disposable wearing article of the first aspect.

(Effect)
The length of the perforation and the width dimension of the slit or hole can be determined as appropriate, but within the scope of this aspect, the tearing length of the perforation is short, so preparation is easy and the splitting is easy. When the portion is sufficiently long, the fit to the wearer is improved and excessive tearing is less likely to occur, which is preferable.

<Third Aspect>
The base end portion and the main body portion include a long fiber nonwoven fabric layer having a basis weight of 50 to 100 g/m ² ,
An articulated disposable wearing article of the first or second aspect.

(Effect)
When the base end portion and the main portion of the connecting tape contain the long-fiber nonwoven fabric as in this aspect, it is difficult to separate them with normal perforations, and therefore the ease of separating the entire perforations tends to be a problem. Therefore, the combination of perforations and slits or holes described above has particular technical significance in such cases.

<Fourth Aspect>
The side flap portion has a surface layer located on the front side of the base end portion and a back surface layer located on the back side of the base end portion,
A tear preventing portion is formed in a portion adjacent to the inner side of the inner end of the slit or hole in the connecting tape,
The entire tear preventing portion is hidden between the surface layer and the back layer,
An articulated disposable wearing article according to any one of aspects 1 to 3.

(Effect)
If perforations and slits or holes are provided in the connecting tape and the perforations are separated from the side edges to divide the tape into upper and lower stages, there is a risk of excessive tearing as described above. On the other hand, it is desirable to provide a tear preventing portion like the one described in Patent Document 1. However, since the tear-preventing portion described in Patent Document 1 is exposed on both the front and back surfaces, there is a risk of impairing the appearance and touch. On the other hand, in this connected disposable wearing article, the base end of the connecting tape is located between the surface layer and the back layer of the side flap portion, and the entire tear preventing portion is located between the surface layer and the back layer. Therefore, it is possible to suppress the deterioration of the appearance due to the exposure of the tear-preventing portion while having the tear-preventing effect.

<Fifth Aspect>
The tear preventing portion is a C-shaped cut portion, a punched hole, or a melt-solidified portion formed adjacent to the inner side of the inner end of the slit or hole and having an uncut portion located laterally. be,
The articulated disposable wearing article of the fourth aspect.

(Effect)
Although the tear preventing portion is not particularly limited, it can be, for example, a cut portion or a punched hole as in this aspect. When the tearing position reaches the cut part or the punched hole, the cut part or the punched hole disperses the stress generated at the tearing position, and the side flap part is torn further inside the cut part or the punched hole. It has the effect of preventing Therefore, excessive tearing as described above can be prevented.
Also, the tear preventing portion can be a melted and solidified portion as in this aspect. The melted and solidified portion has higher strength against tearing than other portions. Therefore, when tearing progresses from the inner end of the slit or hole, tearing can be stopped at this melted and solidified portion. Such a melted and solidified portion can be formed by applying heat embossing or ultrasonic welding to an appropriate portion of the connecting tape.

ADVANTAGE OF THE INVENTION According to this invention, in the connection type disposable wearing article which has a connection tape which can be divided|segmented into two steps|paragraphs upper and lower by perforations, the work of separating a perforation can be facilitated.

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; 1. (a) A cross-sectional view taken along the line 8-8 in FIG. 1, and (b) a cross-sectional view taken along the line 9-9 in FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1; FIG. It is the (a) top view of an elastic sheet, and (b) 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; FIG. 10 is an enlarged plan view showing the wing portion in a deployed state; It is a figure which shows the division|segmentation work of a connection tape.

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 dorsal 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 fiber 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 3, or may be provided in a single form.

The inner surface of the gather sheet 62 has a joining start end in the width direction WD on the side of the top sheet 30, and the portion outside the joining start end in the width direction is the inner surface of each side flap portion SF, that is, the liquid impermeable in the illustrated example. The nonwoven fabric 12 is bonded to the side of the adhesive sheet 11 and to the side of the exterior nonwoven fabric 12 positioned on the outside in the width direction thereof 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 part, side flap part)
The connecting type disposable wearing article of the illustrated example has a pair of end flap portions EF without the absorbent body 56 extending to the front side and the rear side of the absorbent body 56 respectively, and a pair of end flap portions EF not having the absorbent body 56 and extending laterally from both side edges of the absorbent body 56 . and a pair of side flap portions SF which do not have an absorber 56 and which extend to each other. The side flap portions 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 drawing, 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 portion SF while being stretched along the front-rear direction LD. is constructed as a planar gather. As shown in the figure, the leg elastic members 64 are provided between the gathered sheet 62 and the liquid-impermeable sheet 11 on the outside in the width direction near the joining start end of the joined portion of the gathered sheet 62. It can also be provided between the liquid-impermeable sheet 11 and the exterior nonwoven fabric 12 in the SF. A plurality of leg-surrounding elastic members 64 may be provided on each side as in the illustrated example, or only one leg-surrounding elastic member 64 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 side flap portions SF of the back side portion B have wing portions WP extending outward in the width direction WD from the crotch portion M. As shown in FIG. Similarly, the side flap portion SF of 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 flap portion SF as in the illustrated example, by cutting the middle of the front-rear direction LD at the side portion of the side flap portion SF, the concave shape from the side edge of the crotch portion M to the lower edge 71 of the wing portion is formed. Formation of the rim 70 and consequent formation of the wing portions WP is preferred for ease of manufacture. The wing portions WP in at least one of the dorsal portion B and ventral portion F may be omitted, and the side edges of the side flap portions SF may be linear along the front-rear direction.

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

As shown in FIGS. 6 and 9, the connecting tape 80 includes a base end portion 81 fixed to the wing portion WP, a sheet base material 80S forming a main body portion 82 extending from the base end portion 81, and the sheet base 80S. It has connecting portions 83U and 83L for the ventral portion F provided in the middle portion of the base material 80S in the width direction WD of the main body portion 82 . A non-connecting portion 84 that is not connected to the abdominal portion F is formed on the main body portion 82 closer to the base end portion 81 than the connecting portions 83U and 83L, and a knob portion 85 is formed on the opposite side. In other words, the non-connecting portion 84 and the knob portion 85 are made 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 edges in the width direction of the connecting portions 83U and 83L may coincide with the side edges of the wing portions WP, but as shown in FIG. It is preferred that they are sufficiently spaced apart. This separation distance can be about 1 to 100 mm.

The dimensions of the connecting tape 80 may be determined appropriately. For example, the dimension 80w in the width direction WD of the connecting tape 80 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 tape 80. FIG. The dimension of the connecting tape 80 in the front-rear direction LD can be appropriately determined.

As the connecting portions 83U and 83L, a hook member (male member) 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 50 to 100 g/m ² and a thickness of 1 mm or less.

The connecting tape 80 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 is not stretchable.

(Target part)
A target portion 20 is provided at a connecting portion of the connecting tape 80 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, but when the connecting portions 83U and 83L are hook materials, the fibers are partially welded to each other by, for example, an intermittent pattern of ultrasonic welding. A long fiber nonwoven fabric can be used.

In the case where the connecting portions 83U and 83L are made of hook material, a large number of loop threads that engage the engaging protrusions of the hook material are formed on the surface of the base material made of plastic film or non-woven fabric as the sheet material for forming the target portion 20. A sewn composite sheet material can be used.

Furthermore, when the connecting portions 83U and 83L are made of hook material and the connecting portions of the connecting tape 80 in the ventral portion F are 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, the target portion 20 can be formed by entangling the fibers of the exterior nonwoven fabric 12 with the hook material.

On the other hand, when the connecting portions 83U and 83L are adhesive layers, 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 thereof is subjected to peeling treatment. can be used.

(Elastic sheet)
It is preferable that a stretchable sheet 17 elastically stretchable in the width direction WD is attached between the left and right connecting tapes 80 in the dorsal portion B, and the region having the stretchable sheet 17 is elastically stretchable in the width direction WD. . The elastic sheet 17 may be positioned only on the end flap portion EF, but if it is arranged so as to extend from the end flap portion EF to the rear end portion of the absorbent body 56 as shown in the figure, the absorbent body 56 will be stretched. It is preferred because the rear end is firmly pressed against the body.

The elastic 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.

Although the width of the stretchable sheet 17 can be appropriately determined, it is preferable that the stretchable sheet 17 has a width that extends between the left and right side flap portions SF as shown in the illustrated example. As for specific dimensions, the width of the stretchable sheet 17 is preferably about 80 to 95% of the total width X of the body portion excluding the connecting tape 80 .

Both ends of the stretchable 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 intermediate stretchable region 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 about 5-50 mm in order to prevent shrinkage and curling during manufacturing. The non-stretchable region 17n may be a region without the elastic member 19, but the elastic member 19 is attached to the middle 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 in the region 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 does not expand or contract at all, the rear end portion of the absorbent body 56 does not shrink in the width direction, thereby further improving fit.

The elastic sheet 17 is arranged between the liquid-impermeable sheet 11 and the absorbent element 50 in the illustrated example, but is not particularly limited to this arrangement. For example, the stretchable 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, the connecting tape 80 includes a first connecting portion 83U provided on the side portion of the main body portion 82 on the waist side, which is connected to the abdominal portion F, and a leg-surrounding side portion of the main body portion 82. and a second connecting portion 83L for the ventral portion F provided in the portion, and from between the first connecting portion 83U and the second connecting portion 83L at the side edge of the connecting tape 80, in the width direction WD Divided portions 90 and 91 extending in the direction can be divided into upper and lower two stages. Characteristically, the dividing portions 90 and 91 are adjacent to the perforations 90 extending inward in the width direction WD from the side edges of the connecting tape 80 and the inner ends of the perforations 90 in the width direction WD. and a slit 91 extending from the position to the inner end of the split portions 90, 91, and the length 90w in the width direction WD of the perforation 90 (the length from the side edge of the slit to the side edge of the connecting tape) is 25 mm or less.

In this connected disposable wearing article, as shown in FIG. 14(a), both sides of a short perforation 90 of 25 mm or less are grasped with both hands, and as shown in FIG. Only by cutting the stitches 90 from the side edges of the connecting tape 80 and connecting them to the slits 91, the connecting tape 80 can be divided into upper and lower stages longer than the perforations 90, as shown in FIG. 14(c). That is, as compared with the conventional tape having the perforations 90 as a whole, the work of separating the perforations 90 can be completed more easily, and the connecting tape 80 can be divided into upper and lower two stages. In particular, when the base end portion 81 and the main body portion 82 of the connecting tape 80 include a long-fiber nonwoven fabric layer with a basis weight of 50 to 100 g/m ² , the work of separating the perforations 90 tends to be difficult. Adopting a combination of short perforations 90 and slits 91 has special technical significance. In addition, the perforation 90 is positioned on the side edge side of the connecting tape 80, and the slit 91 is positioned further inward in the width direction WD than this. When the user selects to use the connecting tape 80 without dividing it into upper and lower two stages, the connecting tape 80 is highly integrated. .

When wearing, as shown in FIG. 8, the upper portion UP having the first connecting portion 83U on the waist side is pulled obliquely downward and connected to firmly tighten the waist circumference, and the second leg circumference side upper portion UP is pulled diagonally downward. By connecting the lower part LP having the connecting part 83L while pulling it obliquely upward, the circumference of the leg can be firmly tightened. The connection position of the upper part UP and the lower part LP can be appropriately determined by the user, and as shown in FIG. The lower portions LP may not overlap each other, or as shown in FIG. 8B, the positional relationship between the upper portion UP and the lower portion LP may be reversed upside down so that the upper portion UP and the lower portion LP may not overlap each other. Alternatively, although not shown, the upper portion UP and the lower portion LP may partially overlap each other. Also, the perforations 90 can be used without being cut off if necessary.

When the perforation 90 is cut off from the side edge side of the connecting tape 80, after the perforation 90 is cut off, the connecting tape 80 extends further inward than the inner end of the slit 91 or the hole in the width direction WD. There is a risk of tearing the Therefore, in this connected disposable wearing article, it is possible to prevent excessive tearing by inserting a finger into the slit 91 of the connecting tape 80 to separate the perforations 90 from the inside to the outside in the width direction WD.

The position, size, shape, etc. of the perforations 90 can be determined as appropriate. For example, the perforations 90 may be positioned at the center of the front-rear direction LD of the connecting tape 80, or may be located on the waist side or the leg circumference side from the front-rear direction LD center. Normally, the perforations 90 are preferably positioned within a range of ±5 mm in the front-rear direction LD with the center of the connection tape 80 in the front-rear direction LD as a reference. As long as the perforation 90 extends in the width direction WD, the angle with respect to the width direction WD is set to 0 degrees (when along the width direction WD), and to some extent (for example, at an angle of less than 45 degrees) with respect to the width direction WD. It may extend in an inclined direction. The number of perforations 90 may be one as in the illustrated example, or a plurality of perforations.

As long as the inner end of the perforation 90 is located outside the side edge of the side flap portion SF, the dimension 90w in the width direction WD of the perforation 90 can be determined as appropriate, but is preferably 25 mm or less. ~25 mm is more preferred.

(slit)
The slit 91 may extend from a position adjacent to the inner end of the perforation 90 in the width direction WD to the inner ends of the divided portions 90 and 91 . The position adjacent to the inner end of the perforation 90 in the width direction WD means a position close enough to connect the cut portion of the perforation 90 to the slit 91 by completely cutting the perforation 90 . Normally, if the interval 91t between the slit 91 and the adjacent perforation 90 is equal to or less than the length 90t of the tie portion of the perforation 90, the perforation 90 can be easily separated by completely separating the perforation 90. The part becomes connected to the slit 91 .

The position, size, shape, etc. of the slit 91 can be determined as appropriate. The slit 91 means a linearly cut portion, and its shape may be linear, wavy, arc-shaped, or the like. It can be appropriately determined according to the position of the perforations 90 . Although the starting end (outer end) of the slit 91 is near the terminal end (inner end) of the perforation 90 , the slit 91 extends along the same direction as the perforation 90 except for the perforation 90 . It may be bent and extended in an oblique direction or a perpendicular direction. The length 91w of the slit 91 in the width direction WD can be appropriately determined according to the total length of the divided portions 90 and 91, but is obtained by subtracting the width direction WD dimension of the perforation 90 from the width direction WD dimension of the connecting tape 80. It is shorter than the length, and in normal cases, it is preferably 0.7 to 1 times the dimension 90w of the perforations 90 in the width direction WD. In addition, the number of slits 91 may be set to one, or may be provided in plural. For example, as shown in FIG. 12, a plurality of slits 91 may be formed in different directions. The inner end of the slit 91 reaches the base end portion 81 of the connecting tape 80 regardless of whether it is positioned laterally of the side flap portion SF or positioned inward of the side edge of the side flap portion SF. may

As shown in FIG. 13, holes 92 may be provided instead of the slits 91 . The shape of the hole is not particularly limited, but a shape in which the width direction WD dimension is longer than the front-rear direction dimension LD, such as an elliptical hole or an elongated hole, is preferable.

(Tear prevention part)
The inner end of the slit 91 (distal end far from the perforation 90) is torn away from the perforation 90 due to the force applied when tearing the perforation 90, or during the mounting operation after tearing, or during mounting. It may progress. Therefore, it is preferable that the tear preventing portions 95 to 97 are provided adjacent to the distal end of the slit 91 far from the perforation 90 .

As shown in FIG. 9 and the like, the tear preventing portions 95 to 97 can be C-shaped cut portions 95 formed adjacent to the inner ends of the slits 91 and having non-cut portions located laterally. can. Alternatively, the tear preventers 95-97 may be punched holes 96 formed adjacent the inner ends of the slits 91, as shown in FIG. These cut portions 95 or punched holes 96 disperse the stress generated in the tear preventing portions 95 to 97 when a tear progresses beyond the inner end of the slit 91 to the cut portion 95 or the punched hole 96, thereby It has the effect of not tearing even more than 95-97. The shape of the punched hole 96 may be a circular shape as shown in the figure, or may be an elliptical shape, a polygonal shape, or other appropriate shape. The dimensions of the cut portion 95 or the punched hole 96 can be determined as appropriate. For example, the dimension in the front-rear direction LD can be about 5 to 20 mm, and the dimension in the width direction WD can be about 5 to 20 mm.

The tear preventing portion may be a melt-solidified portion 97 formed by melting and solidifying a portion of the connecting tape adjacent to the inner end of the slit 91, as shown in FIG. Such a melted and solidified portion 97 has a higher strength against tearing than other portions. Therefore, when the tear progresses beyond the inner end of the slit 91 to the melted and solidified portion 97, the tear can be stopped at the melted and solidified portion 97. Such a melted and solidified portion 97 can be formed by applying heat embossing or ultrasonic welding to an appropriate portion of the connecting tape 80 . The shape of the melted and solidified portion 97 may be a rectangle having long sides extending in the front-rear direction as shown in the figure, or may be other polygonal, circular, elliptical, or other appropriate shapes. The dimensions of the melted and solidified portion 97 can be determined as appropriate. For example, the dimension in the front-rear direction LD can be about 5 to 20 mm, and the dimension in the width direction WD can be about 5 to 20 mm.

If the tear preventing portions 95 to 97 are exposed on both the front and back surfaces as in the examples shown in FIGS. Therefore, as shown in FIG. 10, the entire tear preventing portions 95 to 97 are hidden between the surface layer (the gathered sheet 62 in the illustrated example) and the back layer (the exterior nonwoven fabric 12 in the illustrated example) of the side flap portion SF. It is preferable to As a result, it is possible to suppress deterioration in appearance and touch due to exposure of the tear-preventing portions 95 to 97 while maintaining the tear-preventing effect.

(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. Non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (including SSS non-woven fabrics in which the same or similar non-woven fabric layers are laminated, SMS non-woven fabrics in which different non-woven fabric layers are laminated, in which a meltblown layer is sandwiched between spunbond layers, SMMS non-woven fabrics, etc.), etc. However, 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 constant temperature and humidity bath 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.

DESCRIPTION OF SYMBOLS 11... Liquid-impermeable sheet, 12... Exterior nonwoven fabric, 17... Elastic sheet, 20... Target part, 30... Top sheet, 40... Intermediate sheet, 50... Absorbent element, 56... Absorbent body, 58... Packaging sheet, 60... Standing gathers 62 Gathered sheet 64 Side elastic member 70 Concave edge 71 Lower edge of wing portion 80 Connecting tape 81 Base end 82 Main body 83L Second connecting portion 83U, 83L ... connecting portion, 83U, 83L ... connecting portion, 83U ... first connecting portion, 90, 91 ... division portion, 90 ... perforation, 91 ... slit, 95 to 97 ... tear prevention portion, 95 ... cut portion, 96 Punched hole 97 Melted and solidified portion B Dorsal portion F Abdominal portion LD Front-back direction LP Lower portion M Crotch SF Side flap UP Upper portion WD ... width direction, WP ... wing 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 a side flap portion extending laterally of the absorbent body,
having a connecting tape attached to the side flap portion of the dorsal portion and detachably connected to the ventral portion;
The connecting tape includes a base end portion fixed to the side flap portion, a main body portion extending from the base end portion, and a waist-side side portion of the main body portion provided on a side portion on the waist side for the abdominal portion. 1 connection part, and a second connection part for the ventral part provided on the side part of the main body part around the leg,
The connecting tape can be divided into upper and lower two stages at a dividing portion extending inward in the width direction from between the first connecting portion and the second connecting portion at the side edge of the connecting tape.
In the connected disposable wearing article,
The dividing portion includes one perforation extending inward in the width direction from a side edge of the connecting tape, and an inner end of the dividing portion extending from a position adjacent to the inner end in the width direction of the perforation. and a hole extending to
The dimension in the width direction of the perforations is 10 to 25 mm,
The dimension in the width direction of the hole is 0.7 to 1 times the dimension in the width direction of the perforation,
The hole is an elliptical hole having a dimension in the front-rear direction from a position on the front side of the perforation to a position on the rear side of the perforation, and a longitudinal direction along the width direction,
By separating the perforation from the side edge side of the connecting tape and connecting the separated part to the hole, the connecting tape is longer than the perforation and is divided into upper and lower two stages,
An articulated disposable wearing article characterized by: The base end portion and the main body portion include a long fiber nonwoven fabric layer having a basis weight of 50 to 100 g/m ² ,
The articulated disposable wearing article according to claim 1. The side flap portion has a surface layer located on the front side of the base end portion and a back surface layer located on the back side of the base end portion,
A tear preventing portion is formed in a portion of the connecting tape adjacent to the inner side of the inner end of the hole,
The entire tear preventing portion is hidden between the surface layer and the back layer,
The connectable disposable wearing article according to claim 1 or 2. The tear prevention part is a melted and solidified part formed adjacent to the inner side of the inner end of the hole,
The articulated disposable wearing article according to claim 3.

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