JP7421973B2 - Disposable wearing items - Google Patents

Description

The present invention relates to a disposable wearing article that is used by attaching a pad type inner disposable diaper.

In disposable wearing articles such as tape-type disposable diapers, a pad-type inner disposable diaper is sometimes used on the surface of the outer disposable diaper so that the entire diaper does not need to be replaced when a small amount of excrement occurs. This type of usage is common in disposable diapers for adults. (For example, see Patent Document 1).

In such a usage pattern, it is important that the inner disposable diaper does not shift relative to the outer disposable diaper during use or during installation work. In order to prevent such slippage, some small-sized inner disposable diapers are known to have a slipping prevention means such as a hook material or an adhesive layer on the back side as a fixing means for the outer disposable diaper. It is also known that slip-preventing means such as a hook material or an adhesive layer is provided on the surface of the top sheet of the outer disposable diaper or on the surface facing the top sheet in the three-dimensional gathers as a means for fixing the inner disposable diaper.

However, such fixing means not only increases cost, but also causes the product to become hard and may damage the skin.

On the other hand, Patent Document 1 assumes the use of an inner disposable diaper that has front and rear ear parts that protrude to both sides at the front and rear parts, and a pair of inner disposable diapers that open toward the center in the width direction. In an outer disposable diaper that has three-dimensional gathers forming pockets on both sides of the surface, the depth of the pockets in the front and rear regions is relatively deeper than the depth of the pocket in the crotch region, and an inner disposable diaper is provided. A disposable diaper has been proposed in which the front and rear ear parts of the diaper fit into pockets.

However, when considering application to existing products (existing designs), it is not easy to deepen the pockets formed by three-dimensional gathers because there are many design elements that are affected. Therefore, there is a problem that the method described in Patent Document 1 is difficult to apply to existing products.

Additionally, in existing products, it is not impossible to make the pocket depth in the crotch area shallower than the pocket depth in the front and back areas, but in that case, it is possible to make the pocket depth in the crotch area shallower than the pocket depth in the front and back areas. This is not preferable because the rising height (pocket depth) of the three-dimensional gathers in the region is lower than that before and after the region.

Japanese Patent Application Publication No. 2005-160843

Therefore, the main object of the present invention is to make it easy to apply the technology of preventing slippage of inner disposable diapers using three-dimensional gather pockets to existing products.

Disposable wearing articles that have solved the above problems are as follows.
<First aspect>
A disposable wearing article with a built-in absorbent body,
The absorbent body has a shape in which the width of the absorbent body is narrower than both the front and back sides at the middle part in the front and back direction, or the absorber has a rectangular shape along the front and back direction, and the disposable wearing article It has a shape in which the middle part has a constricted part that is narrower than both the front and back sides,
a crotch area that is an intermediate area when the range in the front-to-back direction having the constricted portion is divided into three equal parts in the front-to-back direction, and includes the center in the front-to-back direction; a front side area located on the front side of the groin area; and a rear region located on the rear side of the groin region,
Each side of the surface has three-dimensional gathers provided along the blocking position extending in the front and back direction,
The three-dimensional gathers have a root portion attached to the outside of the blocking position in the width direction, and a main portion extending from the root portion to the center side in the width direction,
The main portion includes a plurality of pocket portions provided at intervals in the front-rear direction and forming pockets opening at the center side in the width direction, and a lodging portion provided adjacent to each of the front and rear sides of each of the pocket portions. and a gather elastic member attached to the entrance portion of each pocket portion,
The pocket part is a part that is not fixed to the part facing the back side, and the folding part is a part fixed to the part facing the back side,
The front end and the rear end of the main part are the collapsed parts,
The portion located in at least one of the front region and the rear region of the main portion is an ear pocket formed by the pocket portion, a back side portion located on the back side thereof, and the collapsed portions adjacent to both front and rear sides thereof. has
The entire portion of the main portion located in the crotch region is the pocket portion instead of the lodging portion,
The width of the pocket part in the crotch area is greater than or equal to the width of the narrowest pocket part other than the crotch area.
A disposable wearing article characterized by:

(effect)
This disposable wearing article is an inner disposable diaper that has a front ear part and a rear ear part that protrude on both sides at the front and rear parts of the outer periphery of the product. This is an outer product intended for use with inner disposable diapers that have front and rear ear parts.
The feature of this disposable wearing article is that in addition to the folding parts normally provided at the front and rear ends of the three-dimensional gathers, folding parts are added in areas that have little effect on leakage prevention, and the front and rear ear parts of the inner disposable diaper are An ear pocket into which at least one end is inserted is formed.
In other words, in this disposable article, by inserting the ear portion (at least one of the front ear portion and the rear ear portion) of the inner disposable diaper into the ear pocket, the disposable article and the inner disposable diaper can be handled as one unit. It is possible to improve the integrity of the two (prevent misalignment) during the mounting work and after mounting. Moreover, the present disposable wearing article can be constructed by simply adding a collapsed portion (that is, a joint portion) at a specific position to a general structure, and is extremely easy to apply to existing products. Furthermore, since the area where the folding part is added is other than the crotch area, the rising height of the three-dimensional gathers (pocket depth) is not restricted in most of the crotch area, and the decline in leakage prevention is suppressed. .

<Second aspect>
The folding portion of at least one of the front end and the rear end of the main portion is a waist-side folding portion that constitutes the ear pocket.
Disposable wearing article according to the first aspect.

(effect)
As in this embodiment, it is preferable to use the collapsed portions normally provided at the front and rear ends of the three-dimensional gathers as one of the collapsed portions constituting the ear pocket, since the number of additional collapsed portions can be reduced.

<Third aspect>
A portion of the back side portion located on the entrance side of the ear pocket has a convex portion protruding toward the pocket portion side.
The disposable wearing article according to the first or second aspect.

(effect)
In the case of this embodiment, the gap on the entrance side of the ear pocket becomes narrower in the thickness direction, and the ears of the inner disposable diaper are more strongly pinched, making it more difficult for the inner disposable diaper to come off from the present disposable wearing article.

<Fourth aspect>
The distance in the front-rear direction between the folding part adjacent to the front side of the pocket part constituting the ear pocket and the folding part adjacent to the rear side of the pocket part constituting the ear pocket is at least a certain distance back from the entrance. It becomes longer continuously or stepwise as it moves toward
The disposable wearing article according to any one of the first to third aspects.

(effect)
In this embodiment, the entrance portion of the ear pocket is narrower in the front-rear direction, and when using an inner disposable diaper with an ear portion shorter in the front-rear direction than this, the ear portion is more tightly connected to the entrance of the ear pocket. Because of the pinching, it becomes more difficult for the inner disposable diaper to come off from the present disposable wearing article.

<Fifth aspect>
The folding portion adjacent to the crotch region side of the pocket portion extends such that the edge on the waist side is located on the waist side as it goes toward the center side in the width direction.
The disposable wearing article according to any one of the first to fourth aspects.

(effect)
In the case of this embodiment, when the inner disposable diaper tries to move to the side opposite to the side having the ear pockets, the ears are particularly likely to be caught in the lodging portion, which is preferable.

<Sixth aspect>
The ear pocket is provided only in either the front region or the rear region.
The disposable wearing article according to any one of the first to fifth aspects.

(effect)
This disposable wearing article is suitable for use with multiple types of inner disposable diapers having different dimensions in the front-back direction. However, when ear pockets are provided in both the front region and the rear region, the positions of the front and rear ears may not be compatible depending on the type and size of the inner disposable diaper. Furthermore, having the ear pocket means adding a folding part, and this additional folding part means that the rising height of the three-dimensional gathers is limited. Therefore, if emphasis is placed on suitability for inner disposable diapers and leakage prevention of the three-dimensional gathers, it is desirable to provide ear pockets only on either the front or the front as in this embodiment.

According to the present invention, advantages such as being easily applicable to existing products are brought about while maintaining the slippage prevention property of the inner disposable diaper due to the three-dimensional gather pocket.

FIG. 2 is a plan view showing the front side of the tape-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the back side of the tape-type disposable diaper in an unfolded state. FIG. 2 is a sectional view taken along line iii-iii in FIG. 1; (a) iv-iv cross-sectional view in FIG. 1, (b) v-v cross-sectional view in FIG. 1, (c) vi-vi cross-sectional view in FIG. 1, and (d) vii-vii cross-sectional view in FIG. . FIG. 2 is a plan view showing the inner side of the inner disposable diaper in the unfolded state. FIG. 2 is a plan view showing only the main parts of a state in which an inner disposable diaper is placed over a tape-type disposable diaper. It is a sectional view of an ear pocket. FIG. 2 is a plan view showing main parts of the front side of the tape-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the front side of the tape-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the front side of the tape-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the front side of the tape-type disposable diaper in an unfolded state.

<Example of outer disposable wearable article>
1 to 4 show a tape-type disposable diaper as an example of a disposable wearing article. It should be noted that the points that are necessary for explanation out of the points bonded with the hot melt adhesive are marked with a dot pattern in the plan view and cross-sectional view, respectively. 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 additionally, 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 crotch area C including the center LC in the front-rear direction LD, a front area F located on the front side of the crotch area C, and a rear side area B located on the rear side of the crotch area C. have. In addition, this tape type disposable diaper includes an absorbent core 3 built into an area including the crotch area C, a liquid-permeable top sheet 2 that covers the front side of the absorbent core 3, and a liquid-impermeable top sheet that covers the back side of the absorbent core 3. The liquid-impermeable sheet 1 has a liquid-impermeable sheet 1, and an exterior nonwoven fabric 12 that covers the back side of the liquid-impermeable sheet 1 and forms the outer surface of the product.

The crotch region C is a portion located in the wearer's crotch. When the shape of the absorbent body 3 is a constricted shape (hourglass shape) that is narrower in the middle part of the absorbent body 3 in the front and rear direction LD than both the front and rear sides, the crotch area C is the range in the front and rear direction LD that includes the constricted part of the absorbent body 3. 3N can be an intermediate region when divided into three equal parts in the front-rear direction LD. In addition, if the absorbent body 3 is rectangular and the product outer shape is a constricted shape (hourglass shape) narrower than both front and rear sides at the middle part in the front-rear direction LD, the crotch area C is the constricted part of the product outer shape. It can be set as an intermediate area when the range of the front-back direction LD is divided into three equal parts in the front-back direction LD. In addition, the dimensions of the front and rear regions F and B in the longitudinal direction LD can be the same, or one of the front and rear regions can be made longer than the other (in the illustrated example, the rear region B is longer than the front region F). is also longer).

The materials and characteristic parts of each part will be explained in order below.

(Absorber)
The absorbent body 3 has a basic structure including a stack of pulp fibers, an aggregate of filaments such as cellulose acetate, or a single or multiple fiber aggregate layer made of nonwoven fabric. The absorbent body 3 may be made by mixing a particulate or other superabsorbent polymer into the fiber assembly layer, fixing it in the fiber assembly layer or on the surface of the fiber assembly layer, or interposing it in a layer between the fiber assembly layers as necessary. You can The absorbent body 3 can be wrapped with a packaging sheet (not shown) such as crepe paper, if necessary. In addition, the shape of the absorbent body 3 can be determined as appropriate, but in addition to an hourglass shape (constricted shape) where the width of the middle part in the front-rear direction LD is narrower than both front and rear sides as shown in the figure, it can also be shaped like a rectangle, etc. A shape extending from the front side to the rear side of region C is suitable. The fiber basis weight of the absorbent body 3 can be about 100 to 500 g/m ² and the thickness can be about 1 to 15 mm. Further, the basis weight of the superabsorbent polymer in the absorbent body 3 can be about 0 to 300 g/m ² .

(liquid impermeable sheet)
The liquid-impermeable sheet 1 blocks excrement from seeping out to the back surface. As the liquid-impermeable sheet 1, in addition to a plastic film such as a polyethylene film, it is also possible to use a sheet having moisture permeability without impairing water-blocking properties from the viewpoint of preventing stuffiness. This water-blocking and moisture-permeable sheet is a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in uniaxial or biaxial directions. can be used.

It is desirable that the liquid-impermeable sheet 1 extends over the same or wider area as the absorber 3 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 end portions of the absorber 3 are not covered in the front-rear direction LD and the width direction WD.

In order to give the outer surface of the diaper a cloth-like appearance and feel, the entire back surface of the liquid-impermeable sheet 1 can be covered with an exterior nonwoven fabric 12. The exterior nonwoven fabric 12 can also be omitted, in which case the liquid-impermeable sheet 1 will form the outer surface of the product.

(Top sheet)
The top sheet 2 has liquid permeability, and can be made of, for example, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like.

The top sheet 2 extends from the front end of the product to the rear end in the front-rear direction LD, and extends laterally than the absorbent core 3 in the width direction WD. If the top sheet 2 is located at the center in the width direction WD, appropriate modifications such as making the width of the top sheet 2 shorter than the full width of the absorbent core 3 can be made as necessary.

(end flap)
This tape type disposable diaper has a pair of end flaps EF that do not have the absorbent body 3 and extend to the front side and the rear side of the absorbent body 3, respectively. The constituent materials of the end flaps EF vary depending on the structure of the diaper. In the illustrated example, the end flap EF is a liquid-impermeable sheet 1, an exterior nonwoven fabric 12, a top sheet 2, and a gather sheet 4s (described later), which are stacked and extended on the front and rear sides of the absorbent core 3, and are bonded to each other. However, it is not limited to this. The end flap EF may be formed by adding a special sheet for forming the end flap EF to the front or rear side of the absorbent core 3.

Normally, the dimension of the end flap EF in the front-rear direction LD can be about 20 to 25% of the dimension of the entire diaper in the front-rear direction LD.

(side flap)
The illustrated tape-type disposable diaper has a pair of side flaps SF that do not have the absorbent body 3 and extend to the sides of the absorbent body 3, respectively. The side flap SF may be made of a material (exterior nonwoven fabric 12, etc.) continuous from the portion having the absorbent body 3, as shown in the illustrated example, or may be formed by attaching another material.

(Plane gather)
In the middle part of the side flap SF in the front-rear direction LD, an elongated leg-surrounding elastic member 7 is stretched along the front-rear direction LD between the liquid-impermeable sheet 1 and the exterior nonwoven fabric 12 and is coated with hot melt adhesive or the like. The contraction of the leg elastic member 7 forms so-called plane gathers on the side flap SF. These plane gathers allow the sides of the diaper to elastically expand and contract to fit around the legs. The leg elastic member 7 may be curved along the leg circumference.

The number of leg-surrounding elastic members 7 on each left and right side can be determined as appropriate, but approximately 1 to 10, more preferably 3 to 8, is appropriate. If there are multiple elastic members, the interval between them is 2. It is preferably about 15 mm, particularly about 6 to 10 mm. The elastic members 7 around each leg may include styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, etc. formed in the shape of thread, string, band, etc. A commonly used material such as polyester can be used, and the thickness is preferably about 500 to 1500 dtex, and in the case of natural rubber, about 0.1 to 3 mm, particularly about 0.5 to 3 mm. Further, it is preferable that the elongation rate of each leg-surrounding elastic member 7 when fixed is about 150 to 250%.

(wing part)
In this tape type disposable diaper, the rear region B has a wing portion that extends further outward than the crotch region C in the width direction WD. Similarly, the front region F also has a wing portion that extends outward in the width direction WD from the crotch region C. These wing portions can also be formed from a separate member from the other portions. However, in a structure having side flaps SF as in the illustrated example, by cutting the middle part of the side flap SF in the front-rear direction LD, a concave leg circumference that continues from the side edge of the crotch area C to the lower edge of the wing portion is created. It is preferable that the edge Le is formed and, as a result, the wing portion is formed, since manufacturing is easy.

(Connection tape)
Connecting tapes 5 are attached to both sides of the rear region B (in the illustrated example, the wing portions of the side flaps SF), respectively, protruding from the side edges thereof, and are attached to the surface of the waist area of the front region F along the width direction WD. A target sheet 6 is attached to the body, and when the diaper 100 is worn on the body, the connecting tapes 5 on both sides are passed from each side of the waist to the outer surface of the ventral side and fixed to the target sheet 6. wear. The target sheet 6 can be omitted, and in that case, the connecting tape 5 is fixed directly to the outer surface of the diaper (in the illustrated example, the outer nonwoven fabric 12).

As shown in FIG. 3, the connecting tape 5 has a fixing portion 5f fixed between the sheets in the side flap SF of the rear region B by a means such as a hot melt adhesive, and a fixing portion 5f fixed between the sheets at the side edge of the side flap SF. It has a protruding part 5e that protrudes outward in the width direction WD, and this protruding part 5e has a distal end part 5p and a main body part 5b that is closer to the proximal end than the distal end part 5p. A hook material of a mechanical fastener (male material of a hook-and-loop fastener) having a large number of hook-like protrusions on the surface is attached to the inner surface of the tip portion 5p of the connecting tape 5 as a connecting portion 9 for connecting with the target sheet 6. There is. Further, as the target sheet 6, a sheet (female member of a mechanical fastener (velcro fastener)) 6 having a surface on which a hook-like projection is removably hooked is attached to the outer surface of the front region F. The material of the outer surface of the diaper itself may be used instead of the target sheet 6, an adhesive layer may be used as the connecting portion 9 instead of the hook material, and a resin tape with a smooth surface that is highly adhesive may be used as the target sheet 6. can do.

Further, as shown in FIG. 1, the connecting tape 5 is provided with a perforation 10 along the width direction WD from the outer edge in the width direction WD at the middle part in the front-rear direction LD to the inside of the main body part 5b. By cutting away the perforation 10, it can be separated into an upper part and a lower part each having a fixing part, a main body part, a tip part, and a connecting part 9. Instead of the perforations 10, the parts may be separated by cutting or the like in advance. Such a connecting tape 5 can be removably connected to the target sheet 6 in the front region F with the upper section and the lower section intersecting each other. Of course, the present invention is not limited to the above-mentioned two-stage divided type, and may be applied to other known connecting tapes, such as a type that is not divided into two stages.

(3D gathers)
As shown in FIGS. 1 and 4, in order to prevent excrement from moving laterally on the top sheet 2 and to prevent so-called lateral leakage, there are Three-dimensional gathers 4 are provided along the blocking position extending to.

More specifically, the three-dimensional gathers 4 has a root portion 4x fixed to a region including the side flap SF, and a main portion 4c extending from the root portion 4x. The main portion 4c is not fixed to a portion facing the back side thereof (the surface of the top sheet 2 in the illustrated example), and has pocket portions 4f and 4p that form a pocket opening at the center side in the width direction WD, and the pocket portions 4f and 4p. It has lodging parts 4b, 4d, 4e fixed to the parts adjacent to the front and rear sides of the parts 4f, 4p and facing on the back side, and a gather elastic member 4G attached to the entrance part of the pocket parts 4f, 4p. There is. The folding portions 4b, 4d, and 4e are basically provided at the front and rear ends of the main portion 4c, and at least one is added on each left and right side to form ear pockets 40, which will be described later.

Each part of the three-dimensional gathers 4 in the illustrated example is formed of a gather sheet 4s, and the gather sheet 4s is folded in half at the tip of the main part 4c (the end opposite to the root part 65 side), so that the main part 4c is The part has a two-layer structure. The gathered elastic member 4G is sandwiched between the layers of this two-layer structure. Due to the contraction force of the gather elastic member 4G, the pocket portions 4f and 4p rise up while contracting in the front-back direction, and become extensible in the front-back direction so as to come into close contact with the body surface. The gather elastic member 4G may be provided only in the pocket portions 4f and 4p, but as shown in the illustrated example, the gather elastic member 4G may be fixed from the rear end of the most front side of the collapsed portion 4b to the front end of the most rear side of the collapsed portion 4e. This is preferable because the contraction force of the gather elastic member 4G acts over almost the entire three-dimensional gather.

The inner surface of the gather sheet 4s has a joining start end in the width direction WD on the side of the top sheet 2, and the outer part in the width direction WD from this joining start end is the inner surface of each side flap SF, that is, in the illustrated example, the liquid-free area. It is bonded to the side of the transparent sheet 11 and the side of the exterior nonwoven fabric 12 located outside in the width direction WD using a hot melt adhesive or the like. Note that the dotted portion in the plan view indicates the fixed portion of the three-dimensional gathers 4.

Although not shown in the drawings, as is well known, the main portion 4c of the three-dimensional gathers 4 is divided into a proximal portion extending from an outer portion in the width direction WD to an inner side in the width direction WD, and a width of the proximal portion. Both ends of the main part 4c in the front-rear direction LD are fixed and laid down in a state of being folded in two, which has a tip side part that is folded back toward the body side from the center edge in the direction WD and extends outside in the width direction WD. It is also possible to form a section.

Although the type of gather sheet 4s is not particularly limited, a water-repellent one is usually used to ensure liquid-blocking properties. In particular, nonwoven fabrics having a meltblown layer between spunbond layers (SMS nonwoven fabrics, SMMS nonwoven fabrics, SSMS nonwoven fabrics, SSMMS nonwoven fabrics) are particularly suitable in that they can achieve both soft touch and liquid barrier properties. 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.

The gathered elastic member 4G includes natural rubber or synthetic rubber formed into thread, string, or band shapes, specifically styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, Commonly used materials such as styrene butadiene, silicone, and polyester can be used. As shown in FIGS. 1 and 2, a plurality of gather elastic members 4G may be provided at intervals, or one gather elastic member may be provided. The elongation rate of the gathered elastic member 4G in the unfolded state can be determined as appropriate, and for example, in the case of spandex rubber thread having a thickness of about 420 to 1120 dtex, it can be set to about 230 to 270%.

In particular, in the examples shown in FIGS. 1 to 4, as shown in an enlarged view in FIG. 8, the portion of the main portion 4c located in the front region F includes the pocket portion 4p, the back side portion 2p located on the back side thereof, and It has ear pockets 40 formed by collapsed portions 4b and 4d adjacent to each other on both front and rear sides. Furthermore, the entire portion of the main portion 4c located in the crotch region C is a pocket portion 4f instead of the lodging portions 4b, 4d, and 4e, and the width of the pocket portion 4f in the crotch region C is The width is greater than or equal to the width of the narrowest pocket portions 4f and 4p (in the illustrated example, all pocket portions have the same width). In addition, the entire crotch region C and rear region B are included by the crotch-side collapsed portion 4d that constitutes the ear pocket 40, the collapsed portion 4e located at the rear end of the main portion 4c, and the pocket portion 4f spanning these. A main pocket 41 is formed.

In use, as shown in FIG. 6, the inner disposable diaper 200 (an example will be described later) is placed on top of the present tape-type disposable diaper 100, and the front ears protruding from both sides of the front part of the inner disposable diaper 200 are placed on top of the present tape-type disposable diaper 100. 201 is inserted into the ear pockets 40 formed in the left and right three-dimensional gathers 4, as shown in FIG. 7(a). At this time, if the absorbent body 3 of the inner disposable diaper 200 has a front ear portion 3F projecting to both sides at the front, it is more preferable to insert the absorbent body 3 up to the front ear portion 3F into the ear pocket 40. Further, a portion of the inner disposable diaper 200 on the rear side of the front ear portion 201 can be inserted into the main pocket 41. For example, if the absorbent body 3 of the inner disposable diaper 200 has a rear ear portion 3B projecting to both sides at the rear thereof, it is more preferable to insert the absorbent body 3 up to the rear ear portion 3B into the main pocket 41.

This makes it possible to improve the integrity of the tape type disposable diaper 100 and the inner disposable diaper 200 (prevent slippage) when they are handled as one body and worn, and after they are worn. In particular, in the case of this example, even if the inner disposable diaper 200 tries to move backward, the front ear parts 201, 3F are caught by the lodging part 4d, and movement is prevented. Further, since the pocket portion 4p is raised by the gather elastic member 4G, the entrance of the ear pocket 40 is opened, so that the front ear portions 201, 3F can be easily inserted. Moreover, the present tape type disposable diaper 100 can be constructed by simply adding a lodging portion 4d (i.e., a joint) at a specific position to a general structure, and is extremely easy to apply to existing products. It is. Furthermore, since the lodging portion 4d is added to a region other than the crotch region C, the rise height (pocket depth) of the three-dimensional gathers 4 is not limited in most of the crotch region C, resulting in a decrease in leakage prevention. is suppressed.

Although FIG. 6 shows the side flaps SF of the inner disposable diaper 200 in an expanded state, in the example shown in FIG. When inserted into the ear pocket 40 up to the front ear part 3F of the absorber 3, the part of the side flap SF of the inner disposable diaper 200 located on the side of the front ear part 3F of the absorber 3 and the part in the vicinity thereof are actually: It may be bent in advance to the front side (as shown) or the back side, or it may be bent arbitrarily by insertion force. Similarly, when inserting up to the rear ear part 3B of the absorbent body 3 into the main pocket 41 of the inner disposable diaper 200, the portion of the side flap SF of the inner disposable diaper 200 located on the side of the rear ear part 3B of the absorbent body 3 The portions and the portions in the vicinity thereof may be bent to the front side or back side in advance, or may be bent arbitrarily by insertion force.

Although not shown, only the side flaps SF of the inner disposable diaper 200 are inserted into the ear pockets 40 and the main pocket 41, and the ears 3F and 3B of the absorbent body 3 do not need to be inserted (that is, the inner disposable diaper The total width 3w of the absorbent body 3 of the diaper 200 may be shorter than the distance 4w between the left and right collapsed portions of the three-dimensional gathers 4 of the tape type disposable diaper 100).

Among the folding parts 4b and 4d forming the ear pocket 40, the folding part 4d on the crotch side needs to be provided separately from the folding parts 4b and 4e at the front and rear ends of the main part 4c. On the other hand, among the folding parts 4b and 4d constituting the ear pocket 40, the waist-side folding part 4b may be the main part of the three-dimensional gathers 4, depending on the position and dimensions of the ear pocket 40. Although the folding parts 4b at the front and rear ends of the three-dimensional gathers 4 can be provided separately from the folding parts 4b at the front and rear ends of the three-dimensional gathers 4, as shown in the example shown in FIG. It is preferable to use it as one of the portions 4b because the number of additional collapsed portions 4d can be reduced.

The shape of the folded portions 4b and 4d constituting the ear pocket 40 is not particularly limited, and may be rectangular as shown in FIG. 1, triangular, circular, etc.

The dimensions of the lodging portions 4b, 4d, and 4e (fixed portions) are not particularly limited, but an example is as follows. That is, it is preferable that the dimension W1 in the width direction WD of the lodging portions 4b and 4e located at the front end and the rear end of the main portion 4c is 90% or more of the dimension in the width direction WD of the main portion 4c. 4b and 4e are preferably continuous from the root portion 4x. The dimension W2 in the width direction WD of the other lodging portions 4d is preferably 30% or more of the dimension in the width direction WD of the main portion 4c, and the lodging portions 4d may be continuous from the root portion 4x, It is preferable that the ear pockets 40 and the main pockets 41 are separated from each other by a certain degree (approximately 50% of the dimension in the width direction WD of the main portion 4c) because excrement inside the ear pockets 40 and the main pockets 41 can move through this spaced portion. Furthermore, it is preferable that the length L2 of the collapsed portions 4b and 4e other than the front and rear ends of the main portion 4c in the front-rear direction LD is approximately 10 to 30 mm.

The dimensions in the width direction WD of the pocket parts 4f and 4p are equal to the dimensions in the width direction WD of the main part 4c, which satisfy the basic leakage prevention property required of the three-dimensional gathers 4 and the width direction WD of the ear part of the inner disposable diaper 200. It can be determined according to the dimensions of. In normal cases, the dimensions of the pocket portions 4f and 4p in the width direction WD can be approximately 1/20 to 1/10 times the total length Y1 of the product. On the other hand, the dimension L1 in the front-rear direction LD of the pocket part 4p of the ear pocket 40 is equal to the distance in the front-rear direction LD of the collapsed parts 4b and 4d adjacent to the front and back of the pocket part 4p, and It can be determined as appropriate depending on the dimension of the direction LD. In normal cases, this dimension L1 can be approximately 50 to 100 mm.

As in the example shown in FIGS. 9 and 10, a collapsed portion 4b adjacent to the front side of the pocket portion 4p forming the ear pocket 40, and a collapsed portion adjacent to the rear side of the pocket portion 4p forming the ear pocket 40. 4d preferably have such a shape that the distance between them in the front-rear direction LD increases continuously or stepwise at least a certain distance toward the rear side from the entrance. In this case, when using the inner disposable diaper 200 having the front ear portions 201, 3F which are narrower in the front-rear direction LD and whose dimensions in the front-rear direction are shorter than this, the front ear portions 201, 3F are narrower in the front-rear direction LD. Since the inner disposable diaper 200 is more strongly pinched at the entrance of the ear pocket 40, it becomes more difficult for the inner disposable diaper 200 to come off from the present tape type disposable diaper 100. More specifically, in the example shown in FIG. 9, the waist-side edge of the folded-down portion 4d adjacent to the crotch region C side of the pocket portion 4p constituting the ear pocket 40 becomes closer to the waist as it moves toward the center in the width direction WD. By extending to the side, the entrance of the ear pocket 40 is narrowed. In addition, in the example shown in FIG. 10, the ear pocket 40 is arranged so that the opposing edges of the lodging portions 4b and 4d are arranged in a stepped shape (unlike in the illustrated example, in a linear shape) so that the opposing edges are located on the waist side as they move toward the center in the width direction WD. The entrance of the ear pocket 40 is narrowed by extending in a curved shape.

As shown in FIG. 9, the folded-down portion 4d adjacent to the crotch region C side of the pocket portion 4p constituting the ear pocket 40 has an edge on the waist side positioned toward the waist as it moves toward the center in the width direction WD. If the inner disposable diaper 200 is moved to the side opposite to the side having the ear pockets 40, the ears are particularly likely to be caught on the lodging portions 4d, which is preferable.

Further, as shown in FIGS. 7(b) and 9, when the back side portion 2p has a convex portion 2c protruding toward the pocket portion 4p in a portion located on the entrance side of the ear pocket 40, This is preferable because the gap on the entrance side of the ear pocket 40 becomes narrower in the thickness direction, and the ear portion of the inner disposable diaper 200 is more strongly pinched. Such local convex portions 2c not only form locally thick portions 3c (thicker portions than the portions on both sides in the width direction WD) in the absorber 3 as shown in the illustrated example, but also partially form thick portions in the thickness direction. It can be formed by embossing only the member (for example, the top sheet 2 or the absorbent body 3) or by embossing the entire thickness. The dimensions of the convex portion 2c can be determined as appropriate, and the convex portion 2c may be provided both inside and outside the ear pocket 40, or may be provided only within the ear pocket 40. Moreover, the convex portion 2c may extend over the entire inside of the ear pocket 40, or may be provided so as to include only a part of the inside of the ear pocket 40. Further, only one convex portion 2c may be provided, or a plurality of convex portions 2c may be provided at intervals.

In the illustrated example, the ear pockets 40 are formed only in the front region F, but if the inner disposable diaper 200 has rear ear portions 202, 3B that protrude to both sides at the rear of the outer periphery of the product, together with the ear pockets 40 ( Alternatively, as shown in FIG. 11, ear pockets 40 may be formed in the rear region B. However, when the ear pockets 40 are provided in both the front region F and the rear region B, the positions of the front and rear ears may not be compatible depending on the type and dimensions of the inner disposable diaper 200. Furthermore, having the ear pocket 40 means adding a collapsed portion 4d, and this additional collapsed portion 4d means that the rising height of the three-dimensional gathers 4 is limited. Therefore, if emphasis is placed on ensuring suitability for the inner disposable diaper 200 and leakage prevention of the three-dimensional gathers 4, it is desirable to provide the ear pockets 40 only on either the front or the front, as in the example shown in FIG. .

<Example of inner disposable diapers that can be used together>
The inner disposable diaper 200, which is intended to be used in combination with the above-mentioned tape type disposable diaper 100 (hereinafter also referred to as an outer disposable diaper), has a front part and an outer part as shown in FIG. It has front ear parts 201, 3F and rear ear parts 202, 3B that protrude to both sides at the rear part, and is of a size that can be fitted between the three-dimensional gathers 4 of an outer disposable diaper.

Therefore, the total width 3w of the absorbent body 3 of the inner disposable diaper 200 is preferably equal to or less than the interval 4z in the width direction WD between the root portions 4x of the left and right three-dimensional gathers 4 of the outer disposable diaper. Further, the overhang length of the front ear part 3F and the rear ear part 3B of the absorbent body 3 (half the difference between the total width 3w of the absorbent body 3 and the shortest width 3x of the absorbent body 3 in the crotch area C) is It is preferable that the width be less than or equal to the width (depth of the pocket portions 4f, 4p), particularly about 1/2 to 1 times the width of the main portion 4c.

The inner disposable diaper 200 of the illustrated example is almost the same as the tape type disposable diaper 100 described above except that the connecting tape 5 is omitted and the dimensions and shape are changed. Reference symbols will be used and explanations will be omitted. The member structure of the inner disposable diaper 200 is not limited to this, and any known member structure can be adopted. For example, although not shown, an inner disposable diaper 200 without three-dimensional gathers 4 can also be suitably used.

In addition, some inner disposable diapers 200 have slip prevention means such as an adhesive layer or hook material on the back surface, and others do not, and both of the above-mentioned disposable diapers can be used. If anything, this is of great technical significance when using the inner disposable diaper 200 that does not have a slippage prevention means.

<Others>
As the nonwoven fabric in the above description, any known nonwoven fabric can be used as appropriate depending on the site and purpose. The constituent fibers of the nonwoven fabric include, for example, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based fibers, and polyamide-based fibers (including single-component fibers as well as composite fibers such as core-sheath fibers), as well as recycled fibers such as rayon and cupro. Fibers, natural fibers such as cotton, etc. can be selected without particular limitation, and a mixture of these can also be used. In order to increase the flexibility of the nonwoven fabric, it is preferable that the constituent fibers be crimped fibers. In addition, even if the constituent fibers of a nonwoven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilizing agent), they may be hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent). ). In addition, nonwoven fabrics generally vary depending on the fiber length, sheet forming method, fiber binding method, and laminated structure. It is classified into nonwoven fabrics, point bonded nonwoven fabrics, laminated nonwoven fabrics (SMS nonwoven fabrics with a meltblown layer sandwiched between spunbond layers, SMMS nonwoven fabrics, etc.), and any of these nonwoven 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.

・"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.

・“MD direction” and “CD direction” refer to the flow direction (MD direction) in manufacturing equipment and the lateral direction (CD direction) perpendicular to this, and depending on the part of the product, one of them is the front-back direction. and the other side is in the width direction. The MD direction of the nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. Fiber orientation is the direction along which the fibers of a nonwoven fabric follow. This can be determined by a simple measurement method that determines the orientation direction.

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

・"Front side" means the side of the member that is closer to the wearer's skin when worn, and "back side" means the side 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 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 of the mixture) 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 Measurement Program) under the conditions of load: 0.098 N/cm ² and pressurized area: 2 cm ² . The thickness of the perforated nonwoven fabric is measured at a portion other than the perforations and the protruding parts around them.

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

・Water absorption rate is the "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. .

・The direction of fiber orientation of a nonwoven fabric is the direction along which the fibers of a nonwoven fabric follow. This can be determined by a simple measuring method that determines the fiber orientation direction from the tensile strength ratio.

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

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

- 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.

The present invention is applicable to general disposable wearing articles, such as the tape type disposable diaper described above, as well as pants type disposable diapers.

DESCRIPTION OF SYMBOLS 1... Liquid-impermeable sheet, 10... Perforation, 100... Tape type disposable diaper, 2... Top sheet, 200... Inner disposable diaper, 201, 3F... Front ear part, 202, 3B... Back ear part, 2c... Convex Part, 3... Absorbent body, 4... Three-dimensional gathers, 40... Ear pocket, 41... Main pocket, 4G... Gathered elastic member, 4b, 4d, 4e... Lodging part, 4c... Main part, 4f, 4p... Pocket part, ４ , WD...width direction.

Claims (6)

A disposable wearing article with a built-in absorbent body,
The absorbent body has a shape in which the width of the absorbent body is narrower than both the front and back sides at the middle part in the front and back direction, or the absorber has a rectangular shape along the front and back direction, and the disposable wearing article It has a shape in which the middle part has a constricted part that is narrower than both the front and back sides,
a crotch area that is an intermediate area when the range in the front-to-back direction having the constricted portion is divided into three equal parts in the front-to-back direction, and includes the center in the front-to-back direction; a front side area located on the front side of the groin area; and a rear region located on the rear side of the groin region,
Each side of the surface has three-dimensional gathers provided along the blocking position extending in the front and back direction,
The three-dimensional gathers have a root portion attached to the outside of the blocking position in the width direction, and a main portion extending from the root portion to the center side in the width direction,
The main portion includes a plurality of pocket portions provided at intervals in the front-rear direction and forming pockets opening at the center side in the width direction, and a lodging portion provided adjacent to each of the front and rear sides of each of the pocket portions. and a gather elastic member attached to the entrance portion of each pocket portion,
The pocket part is a part that is not fixed to the part facing the back side, and the folding part is a part fixed to the part facing the back side,
The front end and the rear end of the main part are the collapsed parts,
The portion located in at least one of the front region and the rear region of the main portion is an ear pocket formed by the pocket portion, a back side portion located on the back side thereof, and the collapsed portions adjacent to both front and rear sides thereof. has
The entire portion of the main portion located in the crotch region is the pocket portion instead of the lodging portion,
The width of the pocket part in the crotch area is greater than or equal to the width of the narrowest pocket part other than the crotch area.
A disposable wearing article characterized by: The folding portion of at least one of the front end and the rear end of the main portion is a waist-side folding portion that constitutes the ear pocket.
The disposable wearing article according to claim 1. A portion of the back side portion located on the entrance side of the ear pocket has a convex portion protruding toward the pocket portion side.
The disposable wearing article according to claim 1 or 2. The distance in the front-rear direction between the folding part adjacent to the front side of the pocket part constituting the ear pocket and the folding part adjacent to the rear side of the pocket part constituting the ear pocket is at least a certain distance back from the entrance. It becomes longer continuously or stepwise as it moves toward
The disposable wearing article according to any one of claims 1 to 3. The folding portion adjacent to the crotch region side of the pocket portion extends such that the edge on the waist side is located on the waist side as it goes toward the center side in the width direction.
The disposable wearing article according to any one of claims 1 to 4. The ear pocket is provided only in either the front region or the rear region,
The disposable wearing article according to any one of claims 1 to 5.

Images