JP7349809B2 - Interlocking disposable wearing article - Google Patents

Description

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

A typical connected disposable wearing article has a crotch area including the center in the front-rear direction, a ventral part extending forward from the center in the front-rear direction, and a dorsal part extending rearward from the center in the front-rear direction, and at least the dorsal part. has a front wing and a rear wing that extend from the groin region to the left and right sides in the width direction, the ventral part and the dorsal part have a body part located between the front wing and the rear wing, and the rear wing is It has a connecting part that is detachably connected to the outer surface of the abdominal part. In use, the rear wing is rotated from both sides of the waist to the outer surface of the ventral portion, and the connecting portion of the rear wing is connected to the outer surface of the ventral portion (see, for example, Patent Document 1).

Such articulated disposable wearable articles are also used, for example, in low birth weight infants kept in incubators in neonatal intensive care units (NICUs).

However, when using connected disposable wearable items for low birth weight infants, it is necessary to insert and replace devices by inserting hands into the incubator from one side of the incubator in a narrow incubator. In conventional disposable wearable articles, the work of attaching and detaching the connecting portions is complicated.

Furthermore, even if the baby is not a low birth weight baby, it goes without saying that similar problems may occur when attaching or replacing a connected disposable wearable article in a narrow space such as a car.

Japanese Patent Application Publication No. 2011-110119

Therefore, the main object of the present invention is to facilitate the work of attaching and detaching the connecting tape.

The connected disposable wearing article that solves the above problems is as follows.
<First aspect>
a ventral portion extending anteriorly from the center in the anteroposterior direction;
a dorsal portion extending rearward from the center in the front-rear direction;
an intermediate portion including a crotch region extending from the center in the front-rear direction of the ventral side portion to the middle in the front-rear direction of the dorsal side portion;
a front wing protruding to both left and right sides in front of the intermediate portion;
a rear wing protruding to both left and right sides behind the intermediate portion;
a connecting portion connecting the front wing and the rear wing;
In a connected disposable wearing article having
The connecting portion is provided on the inner surface of the front wing,
The rear wing has a first portion extending laterally, and a second portion folded back inward at the side edge of the first portion,
The connecting portion on the inner surface of the front wing is connectable to the outer surface of at least a second portion of the rear wing.
A connected disposable wearing article characterized by:

(effect)
When this articulated disposable wearable article is worn on a supine wearer, the dorsal part is first placed under the wearer's body, and the ventral part is passed between the legs and placed on the wearer's lower abdomen. Bring it in. This leaves the second portion of the rear wing exposed on both sides of the wearer. After this, the front wing is pinched and lowered toward the rear wing, the connecting part is pressed against the second part to connect it, and the second part is expanded. By doing so, the front wing and the rear wing can be appropriately connected by simply pinching and operating the front wing with one hand. Furthermore, in the connected state, the connecting portion between the front wing and the rear wing is exposed to the side of the wearer, so it is easy to remove the connecting portion even when the wearer wears the wearer in the supine position and then changes his or her body position to the prone position.

Note that the "inner surface" and "outer surface" of the front wing and the rear wing refer to the inner and outer surfaces when the front wing and the rear wing are installed, that is, when the front wing and the rear wing are unfolded.

<Second aspect>
The connecting portion is provided in the middle of the front wing in the width direction,
The front wing has a cover portion extending from an outer side in the width direction than the connecting portion to a center side in the width direction than the connecting portion, and a knob portion folded back outward in the width direction from the cover portion.
The articulated disposable wearing article of the first aspect.

(effect)
When the front wing has such a folding structure, the connecting portion is covered by the cover portion before use, so that it is possible to prevent the connecting portion from damaging the skin. In addition, when in use, by pinching the knob and pulling it to the side, the cover can be opened and the front wing can be pressed and connected to the rear wing. Furthermore, since the knob rises (floats) from the rear wing in the attached state, the connecting part can be removed by easily pinching the front wing with one hand after use.

<Third aspect>
The width direction dimension of the front wing is 30 to 60 mm, the width direction dimension of the connecting portion is 7 to 15 mm, and a plurality of the connecting portions are provided at intervals of 5 to 15 mm in the width direction.
The connected disposable wearing article according to the first or second aspect.

(effect)
The part having the connection part has reduced flexibility and becomes a relatively hard part, which affects the feeling of wearing. Especially in the case of low birth weight babies, the effects on the skin may become a problem. Therefore, by providing a plurality of thin connecting portions, it is desirable to suppress a decrease in the strength of the connection and to suppress a decrease in flexibility.

<Fourth aspect>
It has an absorbent body built into the area including the groin area,
a pair of side flaps without the absorbent body, each including a main body sheet extending laterally from both side edges of the absorbent body from the portion with the absorbent body;
The front wing has a front base portion located in front of the middle portion of the side flap, and a front extension sheet protruding from the front base portion,
having the connecting portion on the inner surface of the front base;
The front extension sheet has a cover part that extends further to the center in the width direction than the connecting part.
The connected disposable wearing article according to any one of the first to third aspects.

(effect)
Considering the stability of the mounting shape and the ease of removing the connecting portion, it is desirable that the connecting portion be provided on the side flap. Considering the need to cover the connecting portion with the front wing and the operability of the front wing, it is desirable that the width of the front wing is wide to some extent. However, if most of the front wing is formed by cutting out the middle of the side flap in a concave shape in the front-rear direction, the amount of waste material (removed portion) becomes large. Therefore, it is desirable to configure as in this embodiment.

<Fifth aspect>
It has an absorbent body built into the area including the groin area,
a pair of side flaps without the absorbent body, each including a main body sheet extending laterally from both side edges of the absorbent body from the portion with the absorbent body;
The rear wing has a rear base portion located on the rear side of the intermediate portion of the side flap, and a rear extension sheet protruding from the rear base portion,
The connecting portion is a hook material of a mechanical fastener,
The rear extension sheet is formed by providing a welded portion in which the fibers are intermittently welded to each other at least in the width direction on a long fiber nonwoven fabric in which the continuous direction of the fibers is in the width direction,
The second portion is a portion where the rear extension sheet is folded back in the middle in the width direction.
The connected disposable wearing article according to any one of the first to fourth aspects.

(effect)
In this way, by forming the connecting area of the rear wing with a separate rear extension sheet, the connecting area of the rear wing can be formed with a flexible special material that is easy to connect with the hook material. The ease and reliability of connecting the wings can be improved.

According to the present invention, advantages such as ease of attaching and detaching the connecting tape are brought about.

FIG. 2 is a plan view showing the inner surface of the tape-type disposable diaper in a state where the diaper is unfolded. FIG. 2 is a plan view showing the outer surface of the tape-type disposable diaper in a state in which the diaper is unfolded. 2 is a sectional view taken along line 6-6 in FIG. 1. FIG. (a) A sectional view taken along the line 5-5 in FIG. 1, and (b) a sectional view taken along the line 7-7 in FIG. (a) A sectional view taken along line 8-8 in FIG. 1, and (b) a sectional view taken along line 9-9 in FIG. FIG. 3 is a plan view showing the main parts of the front wing and the rear wing in an expanded state. FIG. 4 is a cross-sectional view schematically showing changes during installation. 2A and 2B are views corresponding to a cross section taken along the line 5-5 in FIG. 1 and (b) a view corresponding to a cross section taken along the line 7-7 in FIG. 1 of another example. FIG. 3 is a plan view showing the main parts of the front wing and the rear wing in an expanded state. FIG. 4 is a cross-sectional view schematically showing changes during installation. 2A and 2B are views corresponding to a cross section taken along the line 5-5 in FIG. 1 and (b) a view corresponding to a cross section taken along the line 7-7 in FIG. 1 of another example. FIG. 3 is a plan view showing the main parts of the front wing and the rear wing in an expanded state. FIG. 4 is a cross-sectional view schematically showing changes during installation.

Figures 1 to 6 show an example of a tape type disposable diaper, and the symbol X in the figures indicates the total width of the diaper excluding the connecting tape, and the symbol L indicates the total length of the diaper. The dotted pattern indicates hot melt adhesive as a joining means for joining each component located on the front side and the back side. The hot melt adhesive can be applied by known methods such as slot coating, continuous line or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive using a letterpress method). Can be applied. Alternatively or in addition, at the fixed portion of the elastic member, a hot melt adhesive can be applied to the outer circumferential surface of the elastic member to secure the elastic member to the adjacent member. Examples of hot melt adhesives include EVA adhesives, adhesive rubber adhesives (elastomer adhesives), olefin adhesives, and polyester/polyamide adhesives, which can be used without particular limitation. As a joining means for joining each component, means by material welding such as heat sealing or ultrasonic sealing can also be used.

This tape type disposable diaper has a ventral side portion F extending forward from the center in the front-rear direction LD, and a back side portion B extending rearward from the center in the front-rear direction LD. In addition, this tape type disposable diaper includes an absorbent body 56 built into the area including the crotch area, a liquid-permeable top sheet 30 that covers the front side of the absorbent body 56, and a liquid-impermeable top sheet that covers the back side of the absorbent body 56. It has a 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 explained in order below.
(Absorber)
The absorbent body 56 is a part that absorbs and retains excretory fluid, and can be formed from an aggregate of fibers. These fiber aggregates include those obtained by stacking short fibers such as cotton pulp and synthetic fibers, as well as filament aggregates obtained by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber weight can be, for example, about 100 to 300 g/m ² when stacking cotton-like pulp or short fibers, and about 30 to 120 g/m ² in the case of filament aggregates. I can do it. The fineness of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament assembly, the filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimps of the crimped fibers can be, for example, about 5 to 75 crimps, preferably 10 to 50 crimps, and more preferably 15 to 50 crimps per 2.54 cm. Further, crimped fibers that are uniformly crimped can be used.

(Super absorbent polymer particles)
The absorbent body 56 can contain superabsorbent polymer particles in part or in whole. The term "superabsorbent polymer particles" includes "powder" in addition to "particles." As the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are. The particle size of the superabsorbent polymer particles is not particularly limited, but for example, sieving using a 500 μm standard sieve (JIS Z8801-1:2006) (shaking for 5 minutes) and particles falling under the sieve during this sieving. When sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1:2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve It is desirable that the proportion of particles remaining on top is 60% by weight or more.

Although any material can be used for the superabsorbent polymer particles without particular limitation, those with a water absorption of 40 g/g or more are preferred. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles, including starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and cross-linked sodium carboxymethyl cellulose. Materials such as acrylic acid (salt) and acrylic acid (salt) polymers can be used. The shape of the superabsorbent polymer particles is preferably a commonly used powder or granule, 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 backflow.

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

The basis weight of the superabsorbent polymer particles can be determined as appropriate depending on the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be generalized, it can be set at 50 to 350 g/m ² in normal cases.

(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 in a packaging sheet 58. As the packaging sheet 58, tissue paper, especially crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a sheet with small holes, etc. can be used. However, it is desirable that the sheet be a sheet that does not allow the superabsorbent polymer particles to escape. When a nonwoven fabric is used in place of crepe paper, a hydrophilic SMMS (spunbond/meltblown/meltblown/spunbond) nonwoven fabric is particularly suitable, and its material may be polypropylene, polyethylene/polypropylene, or the like. The fiber basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

As shown in FIG. 3, this packaging sheet 58 may have a structure in which a single sheet wraps the entire absorbent core 56, or a plurality of sheets, such as two upper and lower sheets, can wrap the entire absorbent core 56 . The packaging sheet 58 can also be omitted.

(Top sheet)
The top sheet 30 has liquid permeability, and can be made of, for example, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like. Moreover, among these, the raw material fibers of the nonwoven fabric are not particularly limited. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupro, natural fibers such as cotton, mixed fibers and composite fibers made of two or more of these. For example, Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of processing methods include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air-through method, and a point bond method. For example, if flexibility and drapability are desired, the spunlace method is preferred, while if bulkiness and softness are desired, the thermal bond method is preferred.

The top sheet 30 extends from the front end of the product to the rear end in the front-rear direction, and extends laterally than the absorbent body 56 in the width direction WD. When the top sheet 30 is located on the center side in the width direction, appropriate modifications such as making the width of the top sheet 30 shorter than the full width of the absorbent core 56 can be made as necessary.

(intermediate sheet)
In order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorbent body, an intermediate sheet (also called a "second sheet") 40, which has a higher liquid permeation rate than the top sheet 30, can be provided. This intermediate sheet 40 is for quickly transferring the liquid to the absorbent body, improving the absorption performance of the absorbent body, and preventing the phenomenon of “returning” of the absorbed liquid from the absorbent body. The intermediate sheet 40 can also be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bonded nonwoven fabric, or crepe paper. In particular, air-through nonwoven fabrics are preferred because they are bulky. It is preferable to use a composite fiber with a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) with high rigidity is preferable. The basis weight is preferably 17 to 80 g/m ² , more preferably 25 to 60 g/m ² . The thickness of the raw material fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers whose core is not in the center, hollow fibers, or eccentric and hollow fibers as the mixed fibers for all or part of the raw material fibers.

Although the intermediate sheet 40 in the illustrated example is shorter than the width of the absorber 56 and is arranged at the center, 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. The liquid-impermeable sheet 11 is, for example, a microporous sheet obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, molding the sheet, and then stretching the sheet in uniaxial or biaxial directions. A sheet can be suitably used. Further, as the liquid-impermeable sheet 11, a sheet made of non-woven fabric as a base material with improved waterproofness can also be used.

It is desirable that the liquid-impermeable sheet 11 extends over the same or wider area as the absorber 56 in the front-rear direction LD and width direction WD, but if necessary, such as when other water-blocking means are present, It is also possible to have a structure in which the ends of the absorber 56 are not covered in the front-rear direction LD and the width direction WD.

(Exterior nonwoven fabric)
The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 and gives the outer surface of the product a cloth-like appearance. The exterior nonwoven fabric 12 is not particularly limited, and the material fibers include, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupro, and natural fibers such as cotton. As the processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, etc. can be used. However, long-fiber nonwoven fabrics such as spunbond nonwoven fabrics, SMS nonwoven fabrics, and SMMS nonwoven fabrics are preferable because they can provide both softness and strength. In addition to being used as a single piece of nonwoven fabric, it can also be used in layers. In the latter case, it is preferable to bond the nonwoven fabrics together using a hot melt adhesive or the like. When a nonwoven fabric is used, its fiber basis weight is preferably 10 to 50 g/m ² , particularly 15 to 30 g/m ² .

(get up and gather)
In order to prevent excrement from moving laterally on the top sheet 30 and to prevent so-called lateral leakage, riser gathers 60 are provided on both sides of the front surface in the width direction WD to stand up toward the skin of the wearer. It is preferable if Of course, the rising gathers 60 can also be omitted.

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

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 outer part in the width direction from this joining start end is the inner surface of each side flap SF, that is, in the illustrated example, it is liquid impermeable. It is bonded to the sides of the flexible sheet 11 and the sides of the exterior nonwoven fabric 12 located on the outside in the width direction using a hot melt adhesive or the like.

Around the legs, the center side in the width direction from the joining start end of the rising gathers 60 is fixed to the top sheet 30 at both ends in the front and back direction of the product, but the part between them is an unfixed free part, and this free part The portion rises due to the contraction force of the elastic member 63 and comes into close contact with the body surface.

(end flap, side flap)
The tape type disposable diaper of the illustrated example has a pair of end flaps EF that do not have an absorbent body 56 and extend to the front and rear sides of the absorbent body 56, respectively, and a pair of end flaps EF that extend to the front side and the rear side of the absorbent body 56, respectively. It has a pair of side flaps SF that extend and do not have an absorbent body 56. The side flap SF may be made of a main body sheet (exterior nonwoven fabric 12, etc.) continuous from the portion having the absorbent body 56, as shown in the illustrated example, or may be formed by attaching other materials.

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

The plane gathers are the portions on which the contractile force of the side elastic members 64 acts (the portions where the side elastic members 64 are illustrated in the figure). Therefore, in addition to the form in which the side elastic members 64 are present only in the plane gathers region, the side elastic members 64 are present in front of, behind, or on both sides of the plane gathers, but the side elastic members 64 are present only in the plane gathers region. If the member is cut into pieces at one or multiple locations, or is not fixed to the sheet sandwiching the side elastic members 64, or both, the contractile force may not be applied to the parts other than the plane gathers. It also includes a structure in which the contractile force of the side elastic members 64 acts only on the plane gathers (which is essentially equivalent to not providing an elastic member).

(front wing)
This tape type disposable diaper has front wings 80 that protrude on both left and right sides in front of the middle portion M including the crotch area. The front wing 80 can also be formed from a separate member from the other parts. For example, as in the example shown in FIGS. 1 to 7 and the example shown in FIGS. 8 to 10, the front base 81 of the front wing 80 is From the lower edge of the protruding portion located in front of the intermediate portion M of the side flap SF, through the side edge of the intermediate portion M including the crotch area, to the rear base 91 of the rear wing 90 (the intermediate portion M of the side flap SF The width of the front wing 80 can be ensured by forming the concave edge 70 up to the lower edge of the protrusion (located on the rear side) and by the front extension sheet 83 protruding from the front base 81. Further, as in the example shown in FIGS. 11 to 13, the side portions of the side flaps SF are not cut off and are formed in a straight line along the front-rear direction LD, and the entire front wing 80 is It can also be formed by an extension sheet 83.

The front extension sheet 83 can be made of nonwoven fabric, plastic film, polylaminated nonwoven fabric, paper, or a composite material thereof, but a span having a fineness of 1.0 to 3.5 dtex, a basis weight of 60 to 100 g/m ² , and a thickness of 1 mm or less can be used. Bonded nonwoven fabrics, air-through nonwoven fabrics, or spunlace nonwoven fabrics are preferred.

The front extension sheet 83 may be fixed to the inner surface of the side flap SF, as in the examples shown in FIGS. 4 and 8, or may be fixed to the outer surface of the side flap SF, although not shown. Further, as shown in FIG. 11, the front extension sheet 83 may be sandwiched and fixed between a plurality of sheets (in the illustrated example, the gathered sheet 62 and the exterior nonwoven fabric 12) forming the side flap SF.

The shape of the front wing 80 can be determined as appropriate; for example, it may be approximately rectangular as shown in the unfolded state in FIG. 6, or may be a trapezoid or a chevron in which the dimension in the longitudinal direction LD becomes shorter toward the side in the unfolded state. can do. The upper edge, lower edge, and side edges of the front wing 80 may be linear, curved, or wavy.

The dimension 80W of the front wing 80 in the width direction WD (the unfolded state shown in FIG. 6) can be determined as appropriate, and can be, for example, about 30 to 60 mm.

The dimension 80L of the front wing 80 in the longitudinal direction LD can be determined as appropriate, and can be set to about 25 to 35% of the total length L of the product, for example.

As shown in FIGS. 1, 2, 4(b), and 6, a connecting portion 82 connecting the front wing 80 and the rear wing 90 is provided on the inner surface of the front wing 80. As the connecting portion 82, in addition to providing a hook material (male material) of a mechanical fastener (surface fastener), an adhesive layer may be provided. The hook material has a large number of engagement protrusions on its connecting surface, and the shapes of the engagement protrusions include a V-shape, a J-shape, a mushroom-shape, a T-shape, and a double J-shape (J-shape). There are some shapes in which two parts are connected back to back), but any shape may be used.

The position of the connecting portion 82 in the front wing 80 portion can be determined as appropriate. For example, the connecting portion 82 is provided in the middle of the front wing 80 in the width direction WD, and the front wing 80 extends from outside the connecting portion 82 in the width direction WD to the center side of the connecting portion 82 in the width direction WD. It is preferable to have a cover portion 83a and a knob portion 83b folded back outward in the width direction WD from the cover portion 83a. When the front wing 80 has such a folding structure, the connecting portion 82 is covered by the cover portion 83a before use, as shown in FIGS. 2 and 4(b). It can prevent skin damage. Further, when in use, as shown in FIGS. 6 and 7(a), by pinching the knob 83b and pulling it to the side, the connecting portion 82 can be exposed and used. In addition, in the product state, the front wing 80 may be further folded inward at an appropriate position such as the side edge of the absorbent body 56. In other words, it is sufficient that the front wing 80 has the above-mentioned folding structure before the unfolded state of all parts.

When the front wing 80 consists of the side flaps SF and the front extension sheet 83, considering the stability of the attached shape and the ease of removing the connecting part 82, the examples shown in FIGS. 1 to 7 and the examples shown in FIGS. 8 to 10 are As in the example shown, it is desirable that the connecting portion 82 be provided on the side flap SF. Considering the fact that the front wing 80 covers the connecting portion 82 and the operability of the front wing 80, it is desirable that the width of the front wing 80 is wide to some extent. However, if most of the front wing 80 is formed by cutting out the middle of the side flap SF in the front-rear direction LD in a concave shape, the amount of waste material (removed portion) becomes large. Therefore, it is preferable that the connecting portion 82 is provided on the inner surface of the front base portion 81, and that the front extension sheet 83 has a cover portion 83a that extends further to the center side in the width direction WD than the connecting portion 82. Unlike these examples, the connecting portion 82 can also be provided only on the front extension sheet 83, as in the examples shown in FIGS. 11 to 13.

As in the examples shown in FIGS. 8 to 10, a plurality of connecting portions 82 may be provided at intervals (or may not be spaced) in the width direction WD of the front wing 80 portion. When the front wing 80 consists of the side flaps SF and the front extension sheet 83, the connecting portions 82 may be provided on each of the side flaps SF and the front extending sheet 83, or a plurality of connecting portions 82 may be provided on only one of them. good.

The portion including the connecting portion 82 has reduced flexibility and becomes a relatively hard portion, which affects the feeling of wearing. Especially in the case of low birth weight babies, the effects on the skin may become a problem. Therefore, by providing a plurality of thin connecting portions 82, it is desirable to suppress a decrease in the strength of the connection and to suppress a decrease in flexibility. For example, the width direction WD dimension 80W of the front wing 80 is 30 to 60 mm, the width direction WD dimension of the connecting portion 82 is 7 to 15 mm, and a plurality of connecting portions 80 are provided at intervals of 5 to 15 mm in the width direction WD. It is preferable to have one.

(rear wing)
This tape type disposable diaper has rear wings 90 that protrude on both left and right sides on the rear side of the middle portion M. The rear wing 90 can also be formed from a separate member from other parts. For example, as in the examples shown in FIGS. 1 to 7 and the examples shown in FIGS. 8 to 10, by cutting the side part of the side flap SF into a concave shape at the middle in the front-rear direction LD, From the lower edge of the front base 81 of the wing 80 (the protrusion located on the front side of the middle part M of the side flap SF) to the rear base 91 of the rear wing 90 (the protrusion located on the back side of the middle part M of the side flap SF) The width of the rear wing 90 can be ensured by forming the concave edge 70 up to the lower edge of the rear wing 90 and by the rear extension sheet 93 protruding from the rear base 91. Further, as in the examples shown in FIGS. 11 to 13, the side portions of the side flaps SF are not cut off but are formed in a straight line along the front-rear direction LD, and each of the rear wings 90 is entirely protruded from the side flaps SF. It can also be formed by a rear extension sheet 93.

As the rear extension sheet 93, nonwoven fabric, plastic film, polylaminated nonwoven fabric, paper, or a composite material thereof can be used, but a span having a fineness of 1.0 to 3.5 dtex, a basis weight of 60 to 100 g/m ² , and a thickness of 1 mm or less is suitable. Bonded nonwoven fabrics, air-through nonwoven fabrics, or spunlace nonwoven fabrics are preferred.

The rear extension sheet 93 may be fixed to the outer surface of the side flap SF, as shown in FIG. 4, or may be fixed to the inner surface of the side flap SF, although not shown. Moreover, as shown in FIG. 8 and FIG. 11, the rear extension sheet 93 may be sandwiched and fixed between a plurality of sheets forming the side flap SF.

The shape of the rear wing 90 can be determined as appropriate, for example, it may be approximately rectangular as shown in the unfolded state in FIG. 6, or it may be a trapezoid or a chevron in which the dimension in the front-rear direction LD becomes shorter toward the side in the unfolded state. can do. The upper edge, lower edge, and side edges of the rear wing 90 may be linear, curved, or wavy.

The dimension 90W of the rear wing 90 in the width direction WD can be determined as appropriate, and can be set to about 40 to 60 mm, for example. It is preferable that a dimension 90W of the rear wing 90 in the width direction WD is longer than a dimension 80W of the front wing 80 in the width direction WD.

The dimension 90L of the rear wing 90 in the longitudinal direction LD can be determined as appropriate, and can be set to about 25 to 35% of the total length L of the product, for example.

The rear wing 90 has a first portion 93a that extends laterally, and a second portion 93b that is folded back inward at the side edge of the first portion 93a. The folding position is not particularly limited, and may be located at the center of the rear wing 90 in the width direction WD in the unfolded state, or may be located outside or inside the center of the rear wing 90 in the width direction WD in the unfolded state. . When the rear wing 90 is composed of the side flaps SF and the rear extension sheet 93, the folding position is preferably located at the rear extension sheet 93 as shown in the illustrated example, but the folding position is not limited thereto. Further, in the product state, the rear wing 90 may be further folded toward the inner surface at a suitable location such as the side edge of the absorbent body 56. In other words, it is sufficient that the rear wing 90 has a first portion 93a that extends laterally and a second portion 93b that is folded back toward the inner surface in the middle of the width direction WD before all the portions are in the unfolded state. .

The outer surface of the second portion 93b of the rear wing 90 has a portion to which the connecting portion 82 on the inner surface of the front wing 80 can be connected. To this extent, the structure of the rear wing 90 is not particularly limited. For example, when the connecting portion 82 is a hook material (male material) of a mechanical fastener (velcro fastener), the range including at least a part of the outer surface of the second portion 93b is formed of a loop material (female material) of the mechanical fastener or a nonwoven fabric. do it. For example, the rear extension sheet 93 described above can be made of a loop material (female material) of a mechanical fastener or a nonwoven fabric. As a loop material, one in which a loop thread is sewn onto a plastic film is also known, but long-fiber nonwoven fabric (fineness 2.0 to 4.0 dtex, basis weight 20 to 50 g/m ² , a spunbond nonwoven fabric with a thickness of about 0.3 to 0.5 mm) with welded parts intermittently welding fibers together at least in the width direction WD is preferable from the viewpoint of air permeability and flexibility. Of course, the loop material (female material) or nonwoven fabric of the mechanical fastener may be attached to a range that includes at least a portion of the outer surface of the second portion 93b. Furthermore, when the connecting portion 82 is an adhesive layer, a highly adhesive plastic film with a smooth surface may be attached to an area including at least a portion of the outer surface of the second portion 93b.

(installation, etc.)
When this tape type disposable diaper is worn on a wearer who is in a supine position, first, the dorsal part B is placed under the wearer's body 300, and the ventral part F is passed between the legs of the wearer's lower abdomen. bring it upstairs. As a result, the second portion 93b of the rear wing 90 is exposed on both sides of the wearer's body 300, as shown in FIGS. 7(a), 10(a), and 13(a), respectively. Become. After that, the front wing 80 is pinched and lowered toward the rear wing 90 as shown by the arrow, and the connecting part 82 is pressed against the second part 93b to connect it, and FIGS. 13(b), the second portion 93b is developed. By doing so, the front wing 80 and the rear wing 90 can be appropriately connected by simply pinching and operating the front wing 80 with one hand. Furthermore, in the connected state, the connecting portion 82 of the front wing 80 and the rear wing 90 is exposed to the side surface of the wearer's body 300, so that the connecting portion 82 can be easily removed. As can be seen from this explanation, this tape type disposable diaper is suitable for use in low birth weight infants or for easy attachment, rather than tight attachment, where a certain amount of gap is formed between the diaper and the skin surface. ing.

Particularly, when the front wing 80 has the above-mentioned folding structure, when in use, by pinching the knob 83b and pulling it sideways, the cover section 83a is opened, and the front wing 80 is then folded into the rear wing 90. It can be connected by pressing it against the parts. Furthermore, since the knob 83b rises (floats) from the rear wing 90 in the attached state as shown in FIGS. 7(b) and 10(b), the front wing 80 can be easily pinched with one hand after use. Connecting portion 82 can be removed. As shown in FIG. 11, the front wing 80 may not be provided with the knob 83b, and the front wing 80 may lie along the outer surface of the rear wing 90 in the attached state as shown in FIG. 13(b).

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

・“Curve” does not include straight lines.

- "Unfolded state" means a state in which it is flattened without shrinkage or slack.

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

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

・“Basic weight” 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 reach a constant weight. Pre-drying refers to making the sample or test piece constant weight in an environment at a temperature of 100°C. Note that fibers with an official moisture content of 0.0% do not need to be pre-dried. From the test piece that has reached a constant weight, use a sample sampling template (100 mm x 100 mm) to cut out a sample with dimensions of 100 mm x 100 mm. Measure the weight of the sample, multiply by 100 to calculate the weight per square meter, and use it as the basis weight.

- "Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 Handy Compression Tester) under the conditions of load: 0.098 N/cm ² and pressurized area: 2 cm ² .

- "Water absorption" is measured according to JIS K7223-1996 "Water absorption test method for super absorbent resin".

・"Water absorption rate" is "time to end point" when JIS K7224-1996 "Water absorption rate test method for super absorbent resin" is performed using 2 g of super absorbent polymer and 50 g of physiological saline. shall be.

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

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

The present invention can be applied to connected disposable wearing articles such as the tape type disposable diaper described above.

B...Dorsal part, EF...End flap, F...Ventral part, LD...Anteroposterior direction, M...Middle part, SF...Side flap, WD...Width direction, 11...Liquid-impermeable sheet, 12...Exterior nonwoven fabric, 30...Top sheet, 40...Intermediate sheet, 50...Absorbent element, 56...Absorber, 58...Wrapping sheet, 60...Rise gathers, 62...Gather sheet, 64...Side elastic member, 70...Concave edge, 71...Wing Lower edge, 80... Front wing, 81... Front base, 82... Connection part, 83... Front extension sheet, 83a... Cover part, 83b... Knob part, 90... Rear wing, 91... Rear base, 93... Rear extension sheet, 93a...first part, 93b...second part, 300...wearer's body.

Claims (5)

a ventral portion extending anteriorly from the center in the anteroposterior direction;
a dorsal portion extending rearward from the center in the front-rear direction;
an intermediate portion including a crotch region extending from the center in the front-rear direction of the ventral side portion to the middle in the front-rear direction of the dorsal side portion;
a front wing protruding to both left and right sides in front of the intermediate portion;
a rear wing protruding to both left and right sides behind the intermediate portion;
a connecting portion connecting the front wing and the rear wing;
In a connected disposable wearing article having
The connecting portion is provided on the inner surface of the front wing,
The rear wing has a first portion extending laterally, and a second portion folded back inward at the side edge of the first portion,
The widthwise dimension of the second portion is larger than the widthwise dimension of the connecting portion,
During installation, after connecting the entire connecting portion on the inner surface of the front wing to the outer surface of the second portion of the rear wing that is folded back inward at the side edge of the first portion, It is a part that expands
A connected disposable wearing article characterized by: The connecting portion is provided in the middle of the front wing in the width direction,
The front wing has a cover portion extending from an outer side in the width direction than the connecting portion to a center side in the width direction than the connecting portion, and a knob portion folded back outward in the width direction from the cover portion.
The connected disposable wearing article according to claim 1. The width direction dimension of the front wing is 30 to 60 mm, the width direction dimension of the connecting portion is 7 to 15 mm, and a plurality of the connecting portions are provided at intervals of 5 to 15 mm in the width direction.
The connected disposable wearing article according to claim 1 or 2. a ventral portion extending anteriorly from the center in the anteroposterior direction;
a dorsal portion extending rearward from the center in the front-rear direction;
an intermediate portion including a crotch region extending from the center in the front-rear direction of the ventral side portion to the middle in the front-rear direction of the dorsal side portion;
a front wing protruding to both left and right sides in front of the intermediate portion;
a rear wing protruding to both left and right sides behind the intermediate portion;
a connecting portion connecting the front wing and the rear wing;
In a connected disposable wearing article having
The connecting portion is provided on the inner surface of the front wing,
The rear wing has a first portion extending laterally, and a second portion folded back inward at the side edge of the first portion,
During installation, the connecting portion on the inner surface of the front wing is connected to the outer surface of at least the second portion of the rear wing, and then the second portion is expanded ;
It has an absorbent body built into the area including the groin area,
a pair of side flaps without the absorbent body, each including a main body sheet extending laterally from both side edges of the absorbent body from the portion with the absorbent body;
The front wing has a front base portion located in front of the middle portion of the side flap, and a front extension sheet protruding from the front base portion,
having the connecting portion on the inner surface of the front base;
The front extension sheet has a cover part that extends further to the center in the width direction than the connecting part.
A connected disposable wearing article characterized by: a ventral portion extending anteriorly from the center in the anteroposterior direction;
a dorsal portion extending rearward from the center in the front-rear direction;
an intermediate portion including a crotch region extending from the center in the front-rear direction of the ventral side portion to the middle in the front-rear direction of the dorsal side portion;
a front wing protruding to both left and right sides in front of the intermediate portion;
a rear wing protruding to both left and right sides behind the intermediate portion;
a connecting portion connecting the front wing and the rear wing;
In a connected disposable wearing article having
The connecting portion is provided on the inner surface of the front wing,
The rear wing has a first portion extending laterally, and a second portion folded back inward at the side edge of the first portion,
During installation, the connecting portion on the inner surface of the front wing is connected to the outer surface of at least the second portion of the rear wing, and then the second portion is expanded ;
It has an absorbent body built into the area including the groin area,
a pair of side flaps without the absorbent body, each including a main body sheet extending laterally from both side edges of the absorbent body from the portion with the absorbent body;
The rear wing has a rear base portion located on the rear side of the intermediate portion of the side flap, and a rear extension sheet protruding from the rear base portion,
The connecting portion is a hook material of a mechanical fastener,
The rear extension sheet is formed by providing a welded portion in which the fibers are intermittently welded to each other at least in the width direction on a long fiber nonwoven fabric in which the continuous direction of the fibers is in the width direction,
The second portion is a portion where the rear extension sheet is folded back in the middle in the width direction.
A connected disposable wearing article characterized by:

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