JP2020156835A5 - - Google Patents

Description

The present invention relates to an articulated disposable wearable article such as a tape type disposable diaper.

A typical articulated disposable wear item has a crotch area including the anterior-posterior center, a ventral portion extending anteriorly from the anterior-posterior center, and a dorsal portion extending posteriorly from the anterior-posterior center, at least the dorsal portion. Has wing portions extending from the crotch portion on both the left and right sides in the width direction. Further, the wing portion has a connecting portion that is detachably connected to the outer surface of the ventral side portion, and the outer surface of the ventral side portion has a target portion to which the connecting portion is connected. At the time of use, the wing portion is turned from both sides of the waist to the outer surface of the ventral portion to connect the connecting portion of the wing portion to the target portion. Such an articulated disposable wear article is used not only for infants but also for long-term care (adult use) (see, for example, Patent Document 1).

In general, articulated disposable wear items have a poorer fit in the waist direction than pants-type disposable wear items, and therefore, in order to improve leakage from the back in particular, a thick dam is provided on the absorber (for example,). (See Patent Document 1), a member that elastically expands and contracts along the width direction is provided on the waist portion of the dorsal portion (see, for example, Patent Document 2), and a stool pocket (for example, see Patent Document 3) is provided on the waist portion of the dorsal portion. Alternatively, it has been proposed to provide a member that elastically expands and contracts on the connecting tape.

However, it is not possible to secure a space for temporarily receiving urine and stool only by improving the fit by elastic expansion and contraction, and on the other hand, the fit tends to be insufficient only by providing a weir or a pocket due to the shape of the absorber. In particular, the one described in Patent Document 3 is not only not related to the articulated disposable wear article, but also has a complicated structure. Moreover, it is not preferable to simply combine the two because the structure becomes complicated.

On the other hand, the one described in Patent Document 4 is preferable in that a storage space having a high fit is formed on the dorsal side while having a simple structure.

However, the one described in Patent Document 4 has room for improvement in terms of structural simplicity and the like.

Japanese Unexamined Patent Publication No. 2000-342626 Japanese Unexamined Patent Publication No. 2005-152168 Japanese Unexamined Patent Publication No. 2017-064169 Japanese Unexamined Patent Publication No. 2016-066501

Therefore, a main object of the present invention is to provide a connected disposable wearable article in which a storage space having a high fit is formed on the back side while having a simpler structure.

The articulated disposable wear items that have solved the above problems are as follows.
<First aspect>
It has a crotch part including the center in the anterior-posterior direction, a ventral portion extending anteriorly from the center in the anterior-posterior direction, and a dorsal portion extending posteriorly from the center in the anterior-posterior direction.
The absorber built in the range including the crotch part and
A liquid-permeable top sheet provided on the front side of the absorber and
A connecting portion provided on both sides of the dorsal portion and detachably connected to the outer surface of the ventral portion,
An end flap extending posterior to the position of the trailing edge of the absorber,
An elastic sheet including a waist elastic member fixed to the end flap, and
With rising gathers, which rise from the surface along the excrement blocking position on both sides in the width direction,
The portion having the waist elastic member has a waist expansion / contraction region that is contracted in the width direction together with the waist elastic member and can be extended in the width direction.
In the rising gather, the root portion attached to the outside in the width direction of the cutoff position, the main portion extending from the root portion, and the front end portion and the rear end portion of the main portion are fixed in an inverted state, respectively. It was attached to at least the tip portion of the raised portion formed by the formed anterior and posterior inverted portion, the raised portion formed by the portion between the anterior inverted portion and the posterior inverted portion in the main portion being non-fixed, and the raised portion. It has a gathered elastic member,
In articulated disposable wear items
The top sheet extends to the end flap and
The elastic sheet is fixed on the surface of the top sheet between at least the left and right posterior lodging portions, and the waist elastic region is formed between the at least left and right lateral lodging portions in the end flap.
The position of the leading edge of the waist elastic region and the position of the trailing edge of the absorber are separated in the front-rear direction, and
The position of the leading edge of the trailing edge and the position of the trailing edge of the absorber are separated in the front-rear direction.
An articulated disposable wear item.

(Action effect)
In this articulated disposable wearable article, the contraction force of the gather elastic member of the rising gather determines the region between the position of the leading edge of the trailing edge and the position of the trailing edge of the absorber (hereinafter, also referred to as the rising region). It acts to get up from the trailing edge of the absorber. This is because the portion having the absorber has a relatively high rigidity, whereas the portion having the absorber has a lower rigidity on the rear side than the trailing edge of the absorber. Further, in this articulated disposable wear article, the waist elastic region is pressed against the wearer's skin by contraction in the width direction. In particular, when the elastic sheet forming the waist elastic region is fixed on the surface of the top sheet closer to the skin, the waist elastic region is pressed more firmly against the wearer's skin. Therefore, in this articulated disposable wearable article, as a result of the rising area rising and the portion behind it being pressed against the wearer's skin, the trailing edge of the absorber and the vicinity thereof are almost the entire width of the absorber. A deep and wide storage space (pocket) is firmly formed by denting over. Moreover, since this storage space is formed by a combination of the arrangement of the waist expansion / contraction region and the arrangement of the posterior lodging portion of the rising gather, the structure is very simple. In addition, on the waist side of the depression, which is the storage space, the rising area rises and the part behind it is pressed against the wearer's skin, so it is highly effective in blocking the movement of the excretory part to the rear. Moreover, the fit to the wearer's body surface is also good.

<Second aspect>
The position of the leading edge of the posterior lodging portion is located at the same level as or posterior to the leading edge of the waist elastic region.
The articulated disposable wear article of the first aspect.

(Action effect)
If the leading edge of the posterior fold is located anterior to the anterior edge of the waist stretch area, the posterior fold that is less fit to the skin will be in front of the front edge of the waist stretch area that is pressed against the skin. Since it extends, leakage may occur through the rear lodging portion. On the other hand, in the articulated disposable wear article of this embodiment, there is no posterior lodging portion having a high rising portion having a high fit to the skin and having a low rising portion in front of the leading edge of the waist elastic region pressed against the skin. The part will be located. Therefore, as the rising region rises, the rising portion of the rising gathers rises continuously from both sides thereof, so that the leakage prevention property becomes more excellent.

<Third aspect>
The distance between the position of the leading edge of the trailing edge and the position of the trailing edge of the absorber in the anteroposterior direction is 10 to 40 mm.
The articulated disposable wear article of the first or second aspect.

(Action effect)
Since the position of the leading edge of the trailing edge, the position of the trailing edge of the absorber, and the distance in the anteroposterior direction affect the depth of the storage space formed, it is usually preferable to be within the above range.

<Fourth aspect>
The waist stretch region extends at least to the posterior lodgings on both the left and right sides.
A concatenated disposable wearable article according to any one of the first to third aspects.

(Action effect)
In this articulated disposable wearable article, the rising area rises, and the portion located between the left and right rising gathers on the rear side thereof is firmly pressed against the wearer's skin over the entire width direction. Therefore, the leakage prevention property becomes more excellent.

<Fifth aspect>
In the unfolded state, the gather elastic member attached to at least the tip of the rising portion is located on the absorber.
A concatenated disposable wearable article according to any one of the first to fourth aspects.

(Action effect)
It is preferable to adopt such an arrangement because the contraction force of the gather elastic member of the rising gather acts more directly on the rising region, and the rising region is more likely to rise from the trailing edge of the absorber.

<Sixth aspect>
In the elastic sheet, a plurality of elongated elastic members along the width direction are interposed between a pair of nonwoven fabric layers laminated in the thickness direction at intervals in the front-rear direction.
The pair of nonwoven fabric layers are welded at joints arranged at intervals in the front-rear direction and the width direction.
The joint portion is arranged only at the passing position of the elongated elastic member.
The elongated elastic member is fixed to the pair of non-woven fabric layers at the joint portion.
A part or all of the elongated elastic member of the elastic sheet is the waist elastic member.
A concatenated disposable wearable article according to any one of the first to fifth aspects.

(Action effect)
In such a stretchable sheet, when it is contracted to some extent, including when it is worn, the portion where the joints form a row in the front-rear direction becomes a continuous groove in the front-rear direction, and a pair of non-woven fabrics are formed in the non-contact portion between the grooves. The layers bulge to the same extent in opposite directions (both front and back) to form folds. Therefore, not only the surface of the elastic sheet is made of non-woven fabric, but also the joint is present only at the bottom of the groove, which makes it difficult for the skin to come into contact with the skin. It will be good.

<Seventh aspect>
The middle portion of the telescopic sheet in the width direction of the front end portion is a non-fixed portion that is not directly or indirectly fixed to the top sheet.
A concatenated disposable wearable article according to any one of the first to sixth aspects.

(Action effect)
When the non-fixed portion is provided on the elastic sheet in this way, the non-fixed portion covers the upper part of the rear part of the storage space formed by the rising region, so that the excrement moves more backward than the rising region. It can be effectively blocked.

According to the present invention, there are advantages such as a highly fit storage space being formed on the dorsal side while having a simpler structure.

It is a top view in the unfolded state which shows the inner surface of a tape type disposable diaper. It is a top view in the unfolded state which shows the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along the line 7-7 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. 9-9 is a cross-sectional view taken along the line 9-9 of FIG. It is an exploded view of the main part. It is a top view which shows the main part enlarged. (A) is a sectional view taken along line 8-8 of FIG. 1, and (b) is a sectional view schematically showing a rising state thereof. It is a top view which shows the main part enlarged. It is a top view which shows the main part enlarged. (A) is a cross-sectional view corresponding to the cross-sectional view taken along line 8-8 of FIG. 1, and (b) is a cross-sectional view schematically showing the rising state thereof. It is an exploded view of the main part. It is a top view which shows the main part enlarged. (A) A plan view of the telescopic sheet in the unfolded state, (b) a cross-sectional view taken along the width direction of the stretchable sheet in the unfolded state, and (c) a perspective view of the stretchable sheet in a state of being contracted to some extent. It is a front view of the main part of a sample in a natural length state. It is a side view of the sample in a wearing state.

1 to 9 show an example of a tape-type disposable diaper, reference numeral X in the figure indicates the entire width of the diaper excluding the connecting tape, and reference numeral L indicates the total length of the diaper. The dotted pattern portion shows a hot melt adhesive as a joining means for joining the constituent members located on the front side and the back side thereof. The hot melt adhesive can be applied by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). Can be applied. Instead of or in conjunction with this, at the fixed portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by welding a material such as a heat seal or an ultrasonic seal can also be used.

This tape-type disposable diaper has a crotch portion including the center of the anterior-posterior LD, a ventral portion F extending anteriorly from the center of the anterior-posterior LD, and a dorsal portion B extending posteriorly from the center of the anterior-posterior LD. are doing. In addition, this tape-type disposable diaper has an absorber 56 built in a range including the crotch portion, a liquid-permeable top sheet 30 that covers the front side of the absorber 56, and a liquid-impermeable top sheet 30 that covers the back side of the absorber 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.

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

The rigidity of the absorber 56 is not particularly limited, but it will be described later that the rigidity of the absorber 56 in the anteroposterior direction according to JIS L 1913: 2010 "41.5 ° cantilever method" is 75 mm or more. The rising area of the rising area becomes good.

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

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

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

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

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

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

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

(Top sheet)
The top sheet 30 has liquid permeability, and for example, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like can be used.

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

(Intermediate sheet)
An intermediate sheet (also referred to as a "second sheet") 40 can be provided on the back side of the top sheet 30 in order to prevent the liquid that has passed through the top sheet 30 from regurgitating. The intermediate sheet 40 may be omitted.

As the intermediate sheet 40, various non-woven fabrics can be preferably used, and particularly bulky air-through non-woven fabric can be preferably used. It is preferable to use a composite fiber having a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 17 to 80 g / m ² , more preferably 25 to 60 g / m ² . The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

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

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

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

(Exterior non-woven fabric)
The exterior nonwoven fabric 12 covers the entire back side of the liquid-impermeable sheet 11 and gives the outer surface of the product a cloth-like appearance. The non-woven fabric can be used alone or in layers. In the latter case, it is preferable to bond the nonwoven fabrics to each other with a hot melt adhesive or the like. When a non-woven fabric is used, it is preferable that the constituent fibers have a fineness of 1.6 to 2.3 dtex, a basis weight of 15 to 25 g / m ² , and a thickness of 0.3 to 0.8 mm.

(Get up gather)
In order to prevent excrement that travels laterally along the top sheet 30 and prevent so-called lateral leakage, the rising gathers that rise from the surface along the blocking position of the excrement on both sides of the widthwise WD of the surface. It is preferable that 60 is provided.

More specifically, in this rising gather 60, the root portion 65 fixed to the region including the side flap SF, the main portion 66 extending from the root portion, and the front end portion and the rear end portion of the main portion 66 are inverted, respectively. It has an anterior lodging portion 67f and a posterior lodging portion 67b that are fixed and formed in a state, and a rising portion 68 that is formed so that the portion between the anterior lodging portion 67f and the posterior lodging portion 67b in the main portion 66 is not fixed. are doing. Further, a gather elastic member 63 is attached to at least the tip portion of the rising portion 68.

Each part of the rising gather 60 in the illustrated example is formed by a gather sheet 62, and the gather sheet 62 is freely folded at the tip of the main part 66 (the end opposite to the root portion 65 side). The range including the part has a two-layer structure. The gather elastic member 63 is sandwiched between the layers of the two-layer structure portion. The gather elastic member 63 can be provided only on the raised portion 68, but as shown in the illustrated example, when the gather elastic member 63 is fixed from the rear end portion of the front lodging portion 67f to the front end portion of the rear lodging portion 67b, the gather elastic member 63 It is preferable because the contractile force not only acts on the entire rising portion 68 but also acts on the ends of the anterior lodging portion 67f and the posterior lodging portion 67b.

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

The inside of the rising gather 60 in the width direction from the joining start end is fixed on the top sheet 30 at both ends in the front-rear direction of the product, but the rising portion 68 in between is a non-fixed free portion. Therefore, the rising portion 68 rises due to the contraction force of the gather elastic member 63 and comes into close contact with the body surface. Further, as the rising portion 68 contracts in the front-rear direction due to the contraction force of the gather elastic member 63, the portions having the front lodging portion 67f and the rear lodging portion 67b are deformed so as to approach each other.

Although not shown, as is well known, the main portion 66 of the rising gather 60 is formed on the widthwise center side of the proximal end side portion extending inward in the width direction from the outer portion in the width direction and the central side in the width direction of the proximal end side portion. It is also possible to form an inverted portion by fixing both ends in the front-rear direction of the main portion 66 in a state of being folded in half having a tip-side portion that is folded back from the end edge to the body side and extends outward in the width direction.

The type of the gather sheet 62 is not particularly limited, but usually, a water-repellent sheet is used in order to secure the liquid blocking property. In particular, a non-woven fabric having a melt blown layer between the spunbond layers (SMS non-woven fabric, SMMS non-woven fabric, SMSS non-woven fabric, SMSMS non-woven fabric) is suitable in terms of achieving both touch and liquid barrier properties. The non-woven fabric can be used alone or in layers. In the latter case, it is preferable to bond the nonwoven fabrics to each other with a hot melt adhesive or the like.

As the gather elastic member 63, thread rubber (spandex thread rubber having a thickness of about 420 to 1120 dtex) or the like can be used. As shown in FIGS. 1 and 2, a plurality of gather elastic members 63 are provided, and one each can be provided. The elongation rate of the gather elastic member 63 in the unfolded state can be appropriately determined, but can be, for example, about 230 to 270%.

(Side flap)
The tape-type disposable diaper of the illustrated example has a pair of side flap SFs without the absorber 56, each extending laterally from both side edges of the absorber 56. As shown in the illustrated example, the side flap SF may be made of a material (exterior nonwoven fabric 12 or the like) continuous from the portion having the absorber 56, or may be formed by attaching another material.

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

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

(Wing part)
In this tape-type disposable diaper, the dorsal portion B has a wing portion WP extending outward from the crotch portion M in the width direction WD. Similarly, the ventral portion F also has a wing portion WP extending outward of the WD in the width direction from the crotch portion M. These wing portions WP can also be formed by a member different from the other portions. However, in the structure having the side flap SF as shown in the illustrated example, the concave edge from the side edge of the crotch portion M to the lower edge of the wing portion is formed by cutting the middle of the LD in the anteroposterior direction at the side portion of the side flap SF. As a result, it is preferable that the wing portion WP is formed because it is easy to manufacture.

(Connecting tape)
As shown in FIGS. 1, 2 and 5, the wing portion WP in the dorsal portion B is provided with a connecting tape 13 that is detachably connected to the outer surface of the ventral portion F, respectively. When wearing the diaper 10, the connecting tape 13 is rotated from both sides of the waist to the outer surface of the ventral portion F, and the connecting portion 13A of the connecting tape 13 is connected to an appropriate position on the outer surface of the ventral portion F.

As shown in FIG. 5, the connecting tape 13 includes a base end portion 13C fixed to the wing portion WP, a sheet base material 13S forming a main body portion 13B extending from the base end portion 13C, and the sheet base material 13S. It has a connecting portion 13A with respect to the ventral portion F provided in the middle portion of the main body portion 13B in the width direction WD. In the main body portion 13B, the base end portion 13C side from the connecting portion 13A is a non-connecting portion that is not connected to the ventral side portion F, and the opposite side is a knob portion. These non-connecting portions and knob portions are composed only of the sheet base material 13S forming the main body portion 13B.

The connecting portion 13A is made of a hook material (male material) of a mechanical fastener (hook-and-loop fastener). The hook material has a large number of engaging protrusions on its connecting surface, and the shapes of the engaging protrusions are (A) -shaped, (B) J-shaped, (C) mushroom-shaped, and (D). There are T-shapes, (E) double J-shapes (shapes in which J-shapes are joined back to back), etc., but any shape may be used.

Further, as the sheet base material 13S forming from the base end portion 13C to the main body portion 13B, a non-woven fabric, a plastic film, a polylami non-woven fabric, paper or a composite material thereof can be used.

Although the connecting portion 13A in the illustrated example is provided on the sheet base material 13S of the connecting tape 13 protruding from the wing portion WP, it may be provided directly on the wing portion WP.

(Target sheet)
A target sheet 12T is provided at a connecting portion of the connecting tape 13 in the ventral portion F.

The material of the target sheet 12T is not particularly limited, but when the connecting portion 13A is a hook material, for example, a long fiber non-woven fabric in which fibers are partially welded to each other by ultrasonic welding of an intermittent pattern may be used. can. In this case, the long fiber nonwoven fabric is preferably a nonwoven fabric having a fineness of 5 to 10 dtex, a basis weight of 25 to 40 g / m ² , and a thickness of 0.3 to 0.8 mm.

Further, when the connecting portion 13A is a hook material, a target sheet 12T having a large number of loop threads provided on the surface of a base material made of a plastic film or a non-woven fabric in which the engaging protrusions of the hook material are entangled can also be used. .. A specific example of this is a composite sheet material in which loop pile fiber threads are sewn on at least the outer surface of the base material. In this sheet material, loop pile fiber threads are projected on the outer surface of the base material, that is, the outer surface side of the disposable diaper at intervals in the weft direction, and the pile fiber threads are projected on the back side (wearer side) of the base material. Are combined with each other to form an intersecting row of pile fiber diaper yarns.

Further, when the connecting portion 13A is a hook material and the connecting portion of the connecting tape 13 in the ventral portion F is made of a nonwoven fabric (for example, when the exterior nonwoven fabric 12 is provided as shown in the illustrated example), the inside of the exterior nonwoven fabric 12 is formed. , A target sheet 12T such as a plastic sheet, paper, non-woven fabric or the like on which the connection position such as a scale is printed can be arranged. In this case, the user can connect the fibers of the exterior nonwoven fabric 12 by entwining the hook material of the connecting portion 13A at the position of the target sheet 12T that is seen through the exterior nonwoven fabric 12.

On the other hand, when the connecting portion 13A is an adhesive layer, a target sheet 12T having a surface of a plastic film having a smooth surface and having a peeling treatment can be used.

(End flap)
The tape-type disposable diaper has a pair of end flap EFs that do not have the absorber 56, extending to the front side and the back side of the absorber 56, respectively. The constituents of the end flap EF vary depending on the structure of the diaper. For example, in the end flap EF, at least the top sheet 30 of the top sheet 30, the intermediate sheet 40, the gather sheet 62, the liquid permeable sheet 11 and the exterior nonwoven fabric 12 extends to the front side and the rear side of the absorber 56 and is laminated. , And can be formed by portions fixed to each other. Unlike the illustrated example, when the intermediate sheet 40 and the exterior nonwoven fabric 12 are not provided, the end flap EF is formed by the top sheet 30 and the liquid impermeable sheet 11. Further, a dedicated sheet for forming the end flap EF may be added to the front side or the rear side of the absorber 56 to form the end flap EF.

The dimension of the anteroposterior LD of the end flap EF in the dorsal portion B is preferably longer than the dimension of the anteroposterior LD of the base end portion 13C of the connecting tape 13. Normally, the dimension of the anterior-posterior LD of the end flap EF is preferably about 20 to 25% of the dimension L of the anteroposterior LD of the entire diaper, and for infant diapers, it is about 80 to 120 mm. Appropriate.

(Waist expansion and contraction area)
As shown in FIGS. 7 to 9, in the end flap EF, the elastic sheet 70 including the waist elastic member 71 is fixed on the surface of the top sheet 30 at least between the rear lodging portions 67b on both the left and right sides. As a result, a waist expansion / contraction region 79 that contracts in the width direction WD and extends in the width direction WD is formed between at least the left and right rear lodging portions 67b in the end flap EF.

In the elastic sheet 70, as shown in the examples shown in FIGS. 7 to 14, the portion located between the posterior lodging portions 67b on both the left and right sides is located closer to the skin side than the top sheet 30 (the uppermost layer located most on the skin side). As long as (is), the portion overlapping the rising gathers 60 on both the left and right sides is located on the skin side of the gather sheet 62 (becomes the uppermost layer located on the skin side) as shown in FIGS. 7 to 9. Alternatively, it may be located between the gather sheet 62 and the top sheet 30 as in the examples shown in FIGS. 13 and 14.

The portion having the waist elastic member 71 may have the waist elastic region 79 as a whole, or may have only a part of the waist elastic region 79 as shown in FIGS. 7, 8, 15, and the like. .. That is, in the portion having the waist elastic member 71, the elasticity of a part of the waist elastic member 71 may be killed by a known method such as cutting. The waist elastic region 79 is a region circumscribing the portion of all the waist elastic members 71 where the elasticity is not killed. At least the portion of the stretchable sheet 70 that becomes the waist stretchable region 79 is intermittently or continuously joined to the members adjacent to each other in the thickness direction by a hot melt adhesive or the like.

The waist elastic member 71 is not particularly limited as long as it is a material that elastically expands and contracts by itself. For example, in addition to an elongated elastic material such as a thread or a string (for example, spandex rubber having a thickness of about 420 to 1120 dtex), a mesh-like, perforated or non-perforated film-like elastic material, stretchable non-woven fabric, or the like is appropriately used. be able to.

As shown in the figure, the elastic sheet 70 has a two-layer structure by folding a sheet 73 such as a non-woven fabric in half or laminating two sheets, and a plurality of elongated elastic members 71 and 72 between the layers. Can be used in a state of being extended in the width direction WD at intervals in the front-rear direction LD. In this case, about 5 to 15 elastic members 71 and 72 can be provided with an interval d1 of the front-rear direction LD of 3 to 10 mm. Further, the elongation rate of the elastic member in the unfolded state can be about 180 to 220%.

The upper and lower layers of the elastic sheet 70 can be joined and the elastic members 71 and 72 can be fixed by a known method such as a hot melt adhesive or a welding means such as a heat seal or an ultrasonic seal.

In particular, as shown in FIGS. 15A and 15B, the upper and lower layers of the elastic sheet 70 are the nonwoven fabric layers 73a and 73b, and the pair of nonwoven fabric layers 73a and 73b are spaced apart from each other in the front-rear direction LD and the width direction WD. The joint portion 74 is welded at the joint portion 74 arranged therein, and the joint portion 74 is arranged only at the passing position of the elongated elastic members 71, 72, and the elongated elastic members 71, 72 are placed at the joint portion 74 as a pair of non-woven fabrics. It is preferable to fix the layers 73a and 73b. In such a stretchable sheet 70, when it is contracted to some extent, including when it is worn, as shown in FIG. At the non-contact joint portion 74 between the grooves, the pair of nonwoven fabric layers 73a and 73b bulge in opposite directions (both front and back sides) to the same extent to form folds. Therefore, not only the surface of the elastic sheet 70 is made of non-woven fabric, but also the joint portion 74 exists only at the bottom of the groove and is hard to come into contact with the skin, so that the skin feels flexible and the folds are continuous in the front-rear direction LD. Breathability is also good.

(Positional relationship between waist elastic area and absorber, etc.)
As shown enlarged in FIG. 8, the waist stretch region 79 is formed between at least the left and right posterior lodging portions 67b in the end flap EF, and the position of the leading edge of the waist stretch region 79 and the trailing edge of the absorber 56 are formed. It is preferable that the position of is separated from the front-rear direction LD, and the position of the leading edge of the rear lodging portion 67b and the position of the trailing edge of the absorber 56 are separated from each other in the front-rear direction LD.

In this case, the contraction force of the gather elastic member 63 of the rising gather 60 determines the region between the position of the leading edge of the trailing edge portion 67b and the position of the trailing edge of the absorber 56 (hereinafter, also referred to as the rising region 20). As shown in FIG. 9B, it acts to raise the absorber 56 from the trailing edge as a starting point. This is because the portion having the absorber 56 has a relatively high rigidity, whereas the portion having the absorber 56 has a lower rigidity on the rear side than the trailing edge of the absorber 56. Further, in this case, the waist elastic region 79 is pressed against the wearer's skin by the contraction of the WD in the width direction. In particular, when the elastic sheet 70 forming the waist elastic region 79 is fixed on the surface of the top sheet 30 closer to the skin, the waist elastic region 79 is pressed more firmly against the wearer's skin. Therefore, in this articulated disposable wearable article, as shown in FIGS. 16 and 17, the rising region 20 rises and the portion behind the rising region 20 is pressed against the wearer's skin, resulting in the trailing edge of the absorber 56. And the vicinity thereof is recessed over almost the entire width of the absorber 56, and a deep and wide storage space 21 (pocket) is firmly formed. Moreover, since the storage space 21 is formed by a combination of the arrangement of the waist expansion / contraction region 79 and the arrangement of the rear lodging portion 67b of the rising gather 60, the structure is very simple. Further, on the waist side of the recess serving as the storage space 21, the rising region 20 rises and the portion behind it is pressed against the wearer's skin, which has the effect of blocking the movement of the excretory portion to the rear. It is high and has a good fit to the wearer's body surface.

When the leading edge of the posterior lodging portion 67b is located in front of the leading edge of the waist elastic region 79, it is in front of the leading edge of the waist elastic region 79 pressed against the skin and has a low fit to the skin. Since the lodging portion 67b extends, there is a possibility that leakage may occur through the rear lodging portion 67b. Therefore, as shown in the illustrated example, it is preferable that the position of the leading edge of the posterior lodging portion 67b is the same as or located on the posterior side of the leading edge of the waist expansion / contraction region 79. As a result, in front of the leading edge of the waist elastic region 79 pressed against the skin, the posterior lodging portion 67b having a low fit to the skin does not exist, and the rising portion 68 having a high fit to the skin is located. Become. Therefore, as the rising region 20 rises, the rising portion 68 of the rising gather 60 rises continuously from both sides thereof, so that the leakage prevention property becomes more excellent.

The distance 20d of the anteroposterior LD between the position of the leading edge of the trailing edge portion 67b and the position of the trailing edge of the absorber 56 (equal to the dimension of the anteroposterior LD of the rising region 20) is the depth of the storage space 21 formed. Because it affects the product, it can be set as appropriate according to the product. For example, in the normal case, this interval 20d can be 10 to 40 mm, particularly 20 to 30 mm.

The position of the anterior-posterior LD of the leading edge of the waist elastic region 79 can be appropriately determined, but usually, the distance between the anterior-posterior LD of the leading edge of the waist elastic region 79 and the trailing edge of the absorber 56 is the end. It is preferably 0.2 to 0.5 times the dimension of the flap EF in the anteroposterior direction LD. Further, the distance 79a between the leading edge of the waist expansion / contraction region 79 and the leading edge of the posterior lodging portion 67b can be appropriately determined, but is preferably about 0 to 15 mm.

The waist expansion / contraction region 79 may be provided only in a part between the left and right rear lodging portions 67b, for example, as long as it is formed between at least the left and right rear lodging portions 67b in the end flap EF. However, as shown in the illustrated example, when the waist expansion / contraction region 79 extends to at least the rear lodging portions 67b on both the left and right sides, the portion located between the left and right rising gathers 60 on the rear side of the rising region 20 is in the width direction. It will be firmly pressed against the wearer's skin throughout the WD. Therefore, it is preferable because it has more excellent leakage prevention property. From the same viewpoint, the distance 79b of the anteroposterior LD between the trailing edge of the waist expansion / contraction region 79 and the trailing edge of the end flap EF is preferably 17 mm or less.

The gather elastic member 63 does not have to be located on the absorber 56 in the deployed state, but when the gather elastic member 63 attached to at least the tip of the rising portion 68 is located on the absorber 56, the rising gather 60 The contraction force of the gather elastic member 63 acts more directly on the rising region 20, and the rising region 20 is more likely to rise from the trailing edge of the absorber 56, which is preferable.

As shown in the example shown in FIG. 10, the position of the leading edge of the posterior lodging portion 67b is located on the posterior side of the leading edge of the waist expansion / contraction region 79, and the same elongated waist elastic member 71 is used in the front-rear direction LD. When four or more elastic sheets 70 attached at intervals are used, a plurality of first elastic sheets located in the area between the position of the leading edge of the posterior lodging portion 67b and the position of the leading edge of the waist elastic region 79. The waist elastic member 71a and a plurality of second waist elastic members 71b located in other regions are provided, and the distance between the LDs in the front-rear direction of the first waist elastic member 71a is set to the second waist elasticity. It is preferable that the distance between the LDs in the front-rear direction of the member 71b is 0.4 to 0.6 times. This is preferable because wrinkles extending in the vertical direction are formed in the portion of the rising region 20 that overlaps with the waist expansion / contraction region 79, the rigidity is increased by compression, and the formed storage space 21 is less likely to collapse.

Further, as in the example shown in FIG. 8, the position of the leading edge of the posterior lodging portion 67b is located on the posterior side of the leading edge of the waist expansion / contraction region 79, and the same elongated waist elastic member 71 is located in the front-rear direction. When four or more elastic sheets 70 attached at intervals in the direction LD are used, the first elastic sheet located in the region between the position of the leading edge of the posterior lodging portion 67b and the position of the leading edge of the waist elastic region 79. A waist elastic member 71a and a second waist elastic member 71b located in other regions are provided, and the elongation rate of the first waist elastic member 71a is 1 of the extension rate of the second waist elastic member 71b. It is also preferable that the value is 0.05 to 1.15 times. Also in this case, wrinkles extending in the vertical direction are formed in the portion of the rising region 20 that overlaps with the waist expansion / contraction region 79, and the rigidity is increased by compression, so that the formed storage space 21 is less likely to collapse, which is preferable.

As shown in the illustrated example, when a stretchable sheet 70 in which a plurality of elongated waist elastic members 71 are attached at intervals in the front-rear direction LD is used, an edge portion having no waist elastic member 71 at the front end portion of the stretchable sheet 70. Is inevitably formed. Here, as in the example shown in FIG. 11, when the rear end portion of the absorber 56 overlaps the edge portion of the front end portion of the elastic sheet 70 (the trailing edge of the absorber 56 overlaps with the front edge of the elastic sheet 70). The elastic sheet 70 is present over the entire front-rear direction LD of the rising region 20 and the rigidity is increased. Therefore, the rising area 20 rises firmly, and the storage space 21 is less likely to collapse. Further, if there is a gap between the front edge of the elastic sheet 70 and the trailing edge of the absorber 56, the gap may appear thin and leaky depending on the user, but the rear end portion of the absorber 56 may appear to be thin. It is preferable that the elastic sheet 70 overlaps with the edge of the front end portion because the appearance does not give anxiety to the user.

As in the example shown in FIG. 12, when the telescopic sheet 70 is positioned closer to the skin than the top sheet 30, the middle portion of the telescopic sheet 70 in the width direction WD of the front end portion is directly or indirectly connected to the top sheet 30. It is preferable to use a non-fixed portion 78 that is not physically fixed, and a fixed portion that is directly or indirectly fixed to the top sheet 30 other than the non-fixed portion 78. In this case, it is particularly preferable that the non-fixed portion 78 includes the elastic member 72. Since the non-fixed portion 78 covers the rear upper part of the storage space 21 formed by the rising region 20, it is possible to more effectively prevent the movement of excrement behind the rising region 20. Since the elastic member 72 provided in the non-fixed portion 78 of the elastic sheet 70 is not fixed to the end flap EF portion, it is not a waist elastic member 71 and does not form a waist elastic region 79. Although the dimensions of the non-fixed portion 78 can be appropriately determined, it is preferable that the trailing edge of the non-fixed portion 78 is located at the same level as or behind the trailing edge of the rising region 20. Further, it is preferable that both side edges of the non-fixed portion 78 are located between the boundary between the root portion 65 and the main portion 66 of the rising gather 60 and the tip of the main portion 66.

(Non-woven fabric)
As the non-woven fabric in the above description, a known non-woven fabric can be appropriately used depending on the site and purpose. Examples of the constituent fibers of the non-woven fabric include olefin-based fibers such as polyethylene and polypropylene, polyester-based and polyamide-based synthetic fibers (including single-component fibers and composite fibers such as core sheaths), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, and the like can be selected without particular limitation, and these can be mixed and used. In order to increase the flexibility of the non-woven fabric, it is preferable that the constituent fibers are crimped fibers. Further, even if the constituent fibers of the non-woven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilic agent), hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent) are used. Including). In addition, the non-woven fabric generally has a short fiber non-woven fabric, a long fiber non-woven fabric, a spunbond non-woven fabric, a melt blown non-woven fabric, a spunlace non-woven fabric, a thermal bond (air-through) non-woven fabric, and a needle punch, depending on the length of the fiber, the sheet forming method, the fiber bonding method, and the laminated structure. It is classified into non-woven fabric, point-bonded non-woven fabric, laminated non-woven fabric (SMS non-woven fabric having a melt blown layer sandwiched between spunbond layers, SMMS non-woven fabric, etc.), and any of these non-woven fabrics can be used.

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

-The "front-back direction" means the direction (vertical direction) indicated by the symbol LD in the figure, and the "width direction" means the direction (horizontal direction) indicated by WD in the figure, and the front-back direction and the width direction. Are orthogonal.

-"MD direction" and "CD direction" mean the flow direction (MD direction) in the manufacturing equipment and the lateral direction (CD direction) orthogonal to this, and one of them is the front-back direction depending on the part of the product. And the other is in the width direction. The MD direction of the nonwoven fabric is the direction of the fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the non-woven fabric are aligned. It can be discriminated by a simple measurement method for determining the orientation direction.

-The "front side" means the one closer to the wearer's skin when worn, and the "back side" means the one farther from the wearer's skin when worn.

-The "front surface" means the surface of the member that is closer to the wearer's skin when worn, and the "back surface" means the surface of the member that is farther from the wearer's skin when worn. ..

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

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

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

-The "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N / cm ² and a pressurized area of 2 cm ² . The thickness of the perforated nonwoven fabric is measured at a portion other than the holes and the protrusions around them.

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

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

"Microfibrous cellulose" refers to fine cellulose fibers or bundles thereof taken out from plants such as pulp, and generally refers to fibrous cellulose having an average fiber width of nano size (1 to 1000 nm or less), and is an average fiber. Those having a width (median diameter) of 100 nm or less (generally referred to as cellulose nanofibrils (CNF)) are preferable, and those having a width (median diameter) of 10 to 60 nm are particularly preferable.

The "average fiber width" of the fine fibrous cellulose can be measured by the following method. That is, first, 100 ml of an aqueous dispersion of fine fibrous cellulose having a solid content concentration of 0.01 to 0.1% by mass is filtered through a membrane filter made of Teflon (registered trademark), once with 100 ml of ethanol, and with 20 ml of t-butanol. Substitute the solvent three times. Next, it is freeze-dried and coated with osmium to prepare a sample. This sample is observed by an electron microscope SEM image at a magnification of 5000 times, 10000 times or 30000 times (in this example, a magnification of 30000 times) depending on the width of the constituent fibers. Specifically, two diagonal lines are drawn on the observation image, and three straight lines passing through the intersections of the diagonal lines are arbitrarily drawn. Further, a total of 100 fiber rods intersecting with these three straight lines are visually measured. Then, the medium diameter (median diameter) of the measured value is taken as the average fiber width.

The direction of fiber orientation of the non-woven fabric is the direction along which the fibers of the non-woven fabric follow. It can be discriminated by a simple measuring method for determining the fiber orientation direction from the tensile strength ratio.

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

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

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

The present invention is applicable to articulated disposable wear items such as the tape-type disposable diapers of the above examples.

B ... dorsal part, EF ... end flap, F ... ventral part, LD ... front-back direction, SF ... side flap, WD ... width direction, WP ... wing part, 11 ... liquid-impermeable sheet, 12 ... exterior non-woven fabric, 12T ... Target sheet, 13 ... Connecting tape, 13A ... Connecting part, 13B ... Main body part, 13C ... Base end part, 20 ... Rising area, 21 ... Storage space, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element , 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rising gather, 62 ... Gather sheet, 63 ... Gather elastic member, 65 ... Root part, 66 ... Main part, 67b ... Rear lodging part, 67f ... Front lodging part, 68 ... Rising part, 70 ... Elastic sheet, 71 ... Waist elastic member, 79 ... Waist elastic area.