JP7082501B2 - Tape type disposable diapers - Google Patents

Description

The present invention relates to a tape-type disposable diaper.

There are three main types of disposable diapers: tape type, pants type (see Patent Documents 5 and 6), and pad type. Of these, the tape-type disposable diaper is worn by applying it to the body in the unfolded state and then connecting the connecting portions provided on the left and right sides of the dorsal portion to the outer surface of the ventral portion.

A general tape-type disposable diaper has a crotch part including the anterior-posterior center, a ventral part extending anteriorly from the anterior-posterior center, and a dorsal part extending posteriorly from the anterior-posterior center. The side portion has side flaps extending to the left and right sides of the absorber, and the side flap portion of the dorsal portion has a leg peripheral edge extending laterally toward the rear and the leg circumference. It has a waist circumference constituent area located behind the edge, and has a connecting means for detachably connecting to the ventral side portion in the waist circumference constituent area of the dorsal portion (for example, Patent Documents 1 to 1 to). 4). Such tape-type disposable diapers are widely used for nursing care (adult use) as well as for infants.

In such a tape-type disposable diaper, the waist circumference constituent area is a portion corresponding to a curved surface of the body surface (usually a curved surface of a portion along the iliac crest), and therefore it is desirable to have excellent fit to this curved surface.

However, since the conventional waist circumference constituent area is flat in the unfolded state, even if the fit is improved by adding elasticity in the width direction by the elastic member, the contact pressure with respect to the top of the curved surface becomes high, which is a point. There is room for improvement in fit.

Japanese Unexamined Patent Publication No. 2016-174816 Japanese Unexamined Patent Publication No. 2010-22550 Japanese Unexamined Patent Publication No. 2011-139838 Japanese Unexamined Patent Publication No. 2011-72736 Japanese Unexamined Patent Publication No. 2017-0642224 Japanese Unexamined Patent Publication No. 2017-064225

Therefore, a main object of the present invention is to improve the fit of the side flap portion around the waist to the body surface.

Various aspects of the tape-type disposable diaper that solves the above problems are as follows.
<First aspect>
It has a crotch part including the center in the anterior-posterior direction, a ventral part extending anteriorly from the center in the anterior-posterior direction, and a dorsal part extending posteriorly from the center in the anterior-posterior direction.
It has an absorber built in the range including the crotch part, and has an absorber.
The ventral portion and the dorsal portion have side flap portions extending to the left and right sides of the absorber.
The side flap portion of the dorsal portion has a leg peripheral edge extending laterally toward the rear and a waist circumference constituent region located posterior to the leg peripheral edge.
A connecting means for detachably connecting to the ventral portion is provided in the waist circumference constituent region of the dorsal portion.
In tape-type disposable diapers
The waist circumference constituent region of the dorsal portion has three regions, an upper region, an intermediate region, and a lower region.
A first cover that covers the upper elastic sheet provided in the upper region, the lower elastic sheet provided in the lower region, the upper region, the intermediate region, and the lower region, and covers the front side of the upper elastic sheet and the lower elastic sheet. It has a layer and a second cover layer that covers the upper region, the intermediate region, and the lower region and covers the back side of the upper elastic sheet and the lower elastic sheet.
The lower edge of the upper elastic sheet coincides with the lower edge of the upper region, and the upper edge of the lower elastic sheet coincides with the upper edge of the lower region.
The elastic sheet, the first cover layer and the second cover layer are integrated.
The first cover layer and the second cover layer do not have elasticity and do not have elasticity.
The upper region is an expansion / contraction region that is extensible and contracted in the width direction by the upper elastic sheet.
The lower region is an expansion / contraction region that is extensible and contracted in the width direction by the lower elastic sheet.
The intermediate region has no elastic material, or even if it has an elastic material, it does not shrink in the width direction due to the elastic material.
A tape-type disposable diaper that features this.

(Action effect)
As in this embodiment, when the upper region and the lower region of the waist circumference constituent area having the connecting means are set as the stretchable region and the intermediate region is set as the non-stretchable region, the intermediate region is recessed to the back side by the contraction of the upper region and the lower region. Can be done. Therefore, as long as the upper region and the lower region are not extended to the expanded state at the time of wearing, a depression mainly in the intermediate region can be formed on the inner surface of the waist circumference constituent region, and the curved surface of the body surface (particularly on the iliac crest) can be formed. It fits well to the curved surface along the curved surface), and the contact pressure with respect to the top of the curved surface is unlikely to increase. Moreover, due to the elasticity of the upper region and the lower region, the elasticity in the waist circumference direction is also exhibited, and a good fit is exhibited as a whole.
<Second aspect>
The absorber extends posteriorly to at least between the lower regions.
The upper elastic sheet is a member common to the left and right, which is continuous in the width direction from one waist circumference constituent area in the width direction to the other waist circumference constituent region.
The lower elastic sheet is individually provided in one waist circumference constituent area and the other waist circumference constituent area on both sides in the width direction.
A portion that does not have the lower elastic sheet is provided in the region that overlaps with the absorber.
The tape type disposable diaper of the first aspect.

(Action effect)
As in this embodiment, by making the upper elastic sheet a common member continuous to the left and right waist circumference constituent regions, not only the left and right waist circumference constituent regions but also the portion between them can be expanded and contracted in the width direction. This will improve the fit of the rear end (waist edge) of the tape-type disposable diaper. On the other hand, if the lower elastic sheet is individually provided in the left and right waist circumference constituent regions and the non-stretchable region is formed in the region overlapping with the absorber, the fit of the portion having the absorber is improved.
<Third aspect>
The connecting means connects the tape mounting portion fixed to the waist circumference constituent region, the tape main body portion protruding from the tape mounting portion, and the ventral side portion provided in the widthwise intermediate portion of the tape main body portion. It is a connecting tape with a part and
The tape mounting portion extends from a front-rear direction position corresponding to the upper end portion of the upper region in the waist circumference constituent area to a front-rear direction position corresponding to the lower end portion of the lower region.
The tape-type disposable diaper of the first or second aspect.

(Action effect)
Due to the configuration as in this embodiment, when the tape main body portion is picked and pulled, the force is directly transmitted to both the upper region and the lower region. As a result, the upper region and the lower region of the waist circumference constituent area can be pulled in a well-balanced manner at the time of mounting, and appropriate mounting becomes easier.
<Fourth aspect>
The intermediate region has an integrated intermediate elastic sheet sandwiched between the first cover layer and the second cover layer, and the first cover layer, the second cover layer, and the intermediate elastic sheet overlap each other. It has a three-dimensional deformation area in the area,
The first cover layer and the second cover layer in the three-dimensional deformation region are provided with a plurality of slit portions made of slits or perforations for forming the slits.
The plurality of slit portions extend from one edge portion of the three-dimensional deformation region to the other edge portion across the three-dimensional deformation region.
The plurality of slits intersect with each other and
All of the portions of the first cover layer and the second cover layer located in the three-dimensional deformation region are continuous with the portions located outside the three-dimensional deformation region without passing through the slit portion.
A tape-type disposable diaper according to any one of the first to third aspects.

(Action effect)
The intermediate region of this embodiment is accompanied by deformation of the first cover layer and the second cover layer so that the plurality of slit portions expand larger as they approach the intersection position, and the intermediate elastic sheet responds to the expansion of each slit portion. It is elastically elongable. As a result, when a force is applied from one side to the other side in the thickness direction to the three-dimensional deformation region, the three-dimensional deformation region follows this and extends mainly in a plurality of directions orthogonal to each slit portion. , Can be deformed so as to be recessed with respect to the surrounding part. Therefore, if such a dented and deformed three-dimensional deformation region is provided in the intermediate region of the waist circumference constituent region, the upper region and the lower region of the waist circumference constituent region are extended to some extent, and most of the dents in the waist circumference constituent region are formed. Good fit is ensured by denting the three-dimensional deformation area even in a mounting state where it disappears.
Further, since the three-dimensional deformation region is determined by the plurality of slit portions, there is no limitation on the expansion / contraction direction and the degree of expansion / contraction can be increased as compared with the case of one linear slit.
Further, since all the portions of the first cover layer and the second cover layer located in the three-dimensional deformation region are continuous with the portions located outside the three-dimensional deformation region without passing through the slit portion, the existing portion is present. In the manufacturing equipment, it is possible to manufacture by simply providing a slit portion in the first cover layer and the second cover layer.

<Fifth aspect>
In the three-dimensional deformation region, in the state of natural length, the shrinkage wrinkles formed by the shrinkage of the intermediate elastic sheet are not formed in the first cover layer and the second cover layer.
The tape type disposable diaper of the fourth aspect.

(Action effect)
When forming a three-dimensional deformation region by the slit portion, the intermediate elastic sheet may be attached in an extended state at the time of manufacturing, but it is not necessary. Therefore, by integrating the intermediate elastic sheet with the first cover layer and the second cover layer in a state where the intermediate elastic sheet is not substantially stretched at the time of manufacture, wrinkles (including folds) due to shrinkage of the intermediate elastic sheet are formed as in this embodiment. However, it has a stretchable structure with a good appearance. In this case, by providing only the slit portion in the first cover layer and the second cover layer, there is an advantage that the intermediate elastic sheet is neatly concealed by the first cover layer and the second cover layer in the natural length state.

<Sixth aspect>
The slit portion includes a plurality of slit portions that pass through the central portion of the three-dimensional deformation region and have both ends extending to the edges of the three-dimensional deformation region.
The tape-type disposable diaper according to the fourth or fifth aspect.

(Action effect)
As in this embodiment, the slit portion may include a plurality of slit portions that pass through the central portion. In this case, the slit portion extends radially (including X-shaped and cross-shaped) from the central portion of the three-dimensional deformation region. In this embodiment, a wide range of three-dimensional deformation regions can be formed with a minimum number of slits. This aspect is suitable when the three-dimensional deformation region is circular, elliptical, or rhombic.

<Seventh aspect>
The slit portion passes through the central portion of the three-dimensional deformation region, the central slit portion whose both ends extend to the edge portion of the three-dimensional deformation region, and the end portion of the central slit portion, and both ends thereof are three-dimensional. Including an end slit portion extending to the edge of the deformed region,
The tape-type disposable diaper according to the fourth or fifth aspect.

(Action effect)
As in this embodiment, a central slit portion and an end slit portion passing through the end portion thereof can be included. In this case, the slit portion extends in a T-shape, an H-shape, or the like. This aspect is suitable when the three-dimensional deformation region is a triangle or a rectangle.

As described above, according to the present invention, there are advantages such that the waist circumference constituent region of the side flap portion fits well to the curved surface of the body surface.

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. (A) is a sectional view taken along line 8-8 of FIG. 1, and (b) is a sectional view taken along line 9-9 of FIG. (A) is a sectional view taken along line 3-3 of FIG. 1, (b) is a sectional view taken along line 4-4 of FIG. 1, and (c) is a sectional view taken along line 5-5 of FIG. It is (a) plan view in the expanded state, (b) cross-sectional view, and (c) vertical sectional view of a laminated stretchable body. (A) A plan view showing a waist circumference constituent area in a deployed state, and (b) a perspective view showing a waist circumference constituent area in a natural length state. It is a side view which shows the wearing state. It is a top view which shows the arrangement example of the expansion and contraction area. It is a top view which shows the various slit portions. It is (a) perspective view and (b) sectional drawing which shows the deformed state of the expansion and contraction area.

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. is doing. In addition, this tape-type disposable diaper has an absorbent body 56 built in a range including the crotch portion, a liquid-permeable top sheet 30 that covers the front side of the absorbent body 56, and a liquid-impermeable top sheet 30 that covers the back side of the absorbent body 56. It has a sheet 11 and an exterior nonwoven fabric 12 that covers the back side of the liquid-impermeable sheet and constitutes the outer surface of the product. On the other hand, side flap portions SF having no absorber 56 are formed on both sides in the width direction from the ventral portion F to the dorsal portion B, and the side flap portions of the dorsal portion become lateral as they move backward. It has a leg peripheral edge 10 extending so as to be located at, and a waist circumference constituent area 70 located behind the leg peripheral edge 10. The waist circumference constituent area 70 of the dorsal side portion B has a connecting tape 13 that is detachably connected to the outer surface of the ventral side portion F. In the mounted state, for example, as shown in FIG. 9, the connecting tape 13 is connected to the outer surface of the ventral portion F. As shown in FIG. 2 and the like, the side flap portion of the ventral portion F also has a leg circumference edge 10 extending laterally toward the front and a waist circumference located behind the leg circumference edge 10. It has a constituent area 70. The leg peripheral edges 10 of the ventral portion F and the dorsal portion B are continuous, and have a constricted shape in the middle of the anterior-posterior LD of the tape-type disposable diaper. Further, the tape-type disposable diaper of the illustrated example has a pair of end flap portions EFs that do not have the absorber 56 and extend to the front side and the rear side of the absorber 56, respectively.

Hereinafter, the materials and characteristic parts of each part will be described in order.
(Absorber)
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 texture 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.

(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 54, 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, cellulose-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, starch-acrylonitrile copolymer sakens, 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 be set to 50 to 350 g / m ² . If the basis weight of the polymer is less than 50 g / m ² , it becomes difficult to secure the absorption amount. If it exceeds 350 g / m ² , not only the effect is saturated, but also the excess of the highly absorbent polymer particles gives a jerky discomfort.

(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, non-woven fabric of polylami, 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 FIGS. 3 and 5, 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. Good . 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. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, natural fibers such as cotton, mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the nonwoven fabric may be produced by any processing. As the processing method, known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method and the like can be exemplified. For example, if flexibility and drapeability are required, the spunlace method is preferable, and if bulkiness and softness are required, the thermal bond method is preferable.

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

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation speed than the top sheet 30 can be provided. The intermediate sheet 40 is for rapidly transferring the liquid to the absorber, enhancing the absorption performance by the absorber, and preventing the phenomenon of "reversion" of the absorbed liquid from the absorber. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlaced non-woven fabric, spunbonded non-woven fabric, SMS non-woven fabric, pulp non-woven fabric, mixed sheet of pulp and rayon, point-bonded non-woven fabric or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. 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, molding the sheet, and then stretching the sheet 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. 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 exterior nonwoven fabric 12 is not particularly limited, and the material fibers include, for example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, long-fiber non-woven fabrics such as spunbonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are suitable from the viewpoint of achieving both touch and strength. 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, the fiber basis weight is preferably 10 to 50 g / m ² , especially 15 to 30 g / m ² .

(Get up gather)
In order to prevent excrement that travels laterally along the top sheet 30 and prevent so-called lateral leakage, rising gathers 60 that stand up on the wearer's skin side are provided on both sides of the surface widthwise WD. It is preferable to have. Of course, the rising gather 60 can be omitted.

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

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 portion SF, that is, liquid opaque in the illustrated example. It is bonded to the side portion of the sex 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.

Around the legs, the inside of the rising gather 60 in the width direction from the joint start end is fixed on the top sheet 30 at both ends in the front-rear direction of the product, but the part in between is a non-fixed free part, and this free part is It rises due to the contraction force of the elastic member 63 and comes into close contact with the body surface.

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

(Connecting tape)
The waist circumference constituent area 70 in the dorsal side portion B is provided with a connecting tape 13 as a connecting means that is detachably connected to the outer surface of the ventral side portion F. When wearing the diaper, the connecting tape 13 is turned 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.

The structure of the connecting tape 13 is not particularly limited, but in the illustrated example, the tape mounting portion 13C fixed to the waist circumference constituent area 70, the sheet base material forming the tape main body portion 13B protruding from the tape mounting portion 13C, and the sheet base material thereof. It has a connecting portion 13A with respect to the ventral side provided in the middle portion in the width direction of the tape main body portion 13B in the sheet base material, and the tip side from the connecting portion 13A is a knob portion. The shape of the connecting tape 13 is also not particularly limited. For example, the tape mounting portion 13C has the longest and constant portion in the front-rear direction, and the tape main body portion 13B can have a tapered shape that becomes thinner toward the tip. Further, the front-rear direction dimension of the tape mounting portion 13C is preferably 50 to 90% of the front-back direction dimension of the waist circumference constituent area, and is front and back from the upper edge of the upper elastic sheet 71E to the lower edge of the lower elastic sheet 73E, which will be described later. It is preferably equal to or larger than the directional dimension.

As the connecting portion 13A, a hook material (male material) for a mechanical fastener (hook-and-loop fastener) may be provided, or an adhesive layer may be provided. 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), and the like, but any shape may be used.

Further, as the sheet base material forming the tape mounting portion 13C to the tape 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, but the fineness is 1.0 to 3.5 dtex. A spunbonded non-woven fabric, an air-through non-woven fabric, or a spunlaced non-woven fabric having a texture of 20 to 100 g / m ² and a thickness of 1 mm or less is preferable.

(Target part)
It is preferable to provide a target portion at the connecting portion of the connecting tape 13 in the ventral portion F. As shown in the illustrated example, the target portion can be provided by attaching the target sheet 20 for facilitating the connection to the outer surface of the ventral portion F. As the target sheet 20, when the connecting portion 13A is a hook material, a target sheet 20 having a large number of loop threads provided on the surface of a sheet base material made of a plastic film or a non-woven fabric so that the engaging protrusions of the hook material are entangled can be used. Further, in the case of the pressure-sensitive adhesive layer, a sheet base material made of a plastic film having a smooth surface, which is highly adhesive, can be used after being peeled off. Further, when 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 target sheet 20 is omitted and the hook material is used as the fiber of the exterior nonwoven fabric 12. It can also be entwined and connected. In this case, the target sheet 20 as a mark may be provided between the exterior nonwoven fabric 12 and the liquid-impermeable sheet 11, or the mark may be printed on the outer surface of the exterior nonwoven fabric 12 or the liquid-impermeable sheet 11.

(Constituent area around the waist of the dorsal part)
Characteristically, as shown in an enlarged manner in FIG. 8, the waist circumference constituent region 70 of the dorsal portion B has three regions, an upper region 71, an intermediate region 72, and a lower region 73. Further, as shown in FIG. 6, the waist circumference constituent region 70 includes an upper elastic sheet 71E provided in the upper region 71, a lower elastic sheet 73E provided in the lower region 73, an upper region 71, an intermediate region 72, and the lower elastic sheet 73E. The first cover layer 91 covering the front side of the upper elastic sheet 71E and the lower elastic sheet 73E over the lower region 73, and the back side of the upper elastic sheet 71E and the lower elastic sheet 73E over the upper region 71, the intermediate region 72 and the lower region 73. It has a second cover layer 92 to cover. In the illustrated example, the materials and the number of layers to be the first cover layer 91 and the second cover layer 92 are different depending on the portion of the waist circumference constituent area 70, but they may be the same, and the number of layers is one layer. (In the portion having the smallest number of layers in the illustrated example, the first cover layer 91 is composed of only the gather sheet 62, and the second cover layer 92 is composed of only the exterior nonwoven fabric 12.). Further, as long as the first cover layer 91 and the second cover layer 92 do not have elasticity, the sheet contained therein may include one having elasticity, but both the front and back surfaces are formed of non-woven fabric. It is preferable that it is. The term "non-stretchable" means that the elongation ratio at the elastic limit is 1.0 to 1.3 times in all directions orthogonal to the thickness direction.

As the upper elastic sheet 71E and the lower elastic sheet 73E, a material that elastically expands and contracts by itself, such as an elastic film and an elastic non-woven fabric, can be used, and as shown in FIG. 7, two non-woven fabrics and the like can be used. The support layer 81 of the above is bonded with an adhesive such as a hot melt adhesive, and an elastic member 82 having a hole, a mesh shape, an elongated shape (thread shape, a string shape, etc.) is inserted between the support layers 81 in the width direction. It is also possible to use the laminated stretchable body 80 fixed in a state of being stretched along the line. As the material of the support layer 81 in this case, the same material as that of the exterior nonwoven fabric 12 can be used. The elongation rate of the elastic member 82 is preferably about 150 to 250%. When an elongated elastic member 82 (thread-shaped or string-shaped) is used, it is preferable to provide about 5 to 15 elastic members 82 having a thickness of 420 to 1120 dtex at an interval of 3 to 10 mm and an interval of 82 d.

Both ends of the widthwise WD in such a laminated stretchable body may be a non-stretchable region 86 in order to hold and attach by suction at the time of manufacturing. The dimensions of the non-stretchable region 86 and the dimensions of the intermediate stretchable region 85 located between them and expanding and contracting in the width direction WD can be appropriately determined, but the width of the intermediate stretchable region 85 is the width of the left and right connecting tape 13 described later. The width of the non-stretchable region 86 is preferably about 45 to 90% of the width between the connecting portions 13A, and is preferably about 5 to 50 mm in order to prevent shrinkage and curling during manufacturing. The non-stretchable region 86 may be a region having no elastic member 82, but the non-stretchable region 86 is non-stretchable by attaching the elastic member 82 over the intermediate stretchable region 85 and the non-stretchable region 86 and cutting the elastic member 82 in the non-stretchable region 86. The structure may be such that the elastic member 82 remains in the region 86 but hardly expands or contracts at all.

Further, as the upper elastic sheet 71E and the lower elastic sheet 73E, those having no holes and those having a large number of holes and slits for ventilation can be used. The upper elastic sheet 71E and the lower elastic sheet 73E are not limited by the characteristics, but for example, the tensile strength in the width direction WD (extension direction ED, MD direction) is 8 to 25 N / 35 mm, and the front-rear direction LD (extension direction). It is possible to use one having a tensile strength of 5 to 20 N / 35 mm in the orthogonal directions XD and CD directions, a tensile elongation of 450 to 1050% in the width direction WD, and a tensile elongation of 450 to 1400% in the anteroposterior LD. can. The thickness of the upper elastic sheet 71E and the lower elastic sheet 73E is not particularly limited, but in the case of an elastic film, it can be, for example, about 20 to 40 μm.

The upper elastic sheet 71E and the lower elastic sheet 73E and the first cover layer 91, and the upper elastic sheet 71E and the lower elastic sheet 73E and the second cover layer 92 are adhered to each other via a hot melt adhesive, or at least one of them. Can be integrated by welding. Further, the first cover layer 91, the upper elastic sheet 71E and the lower elastic sheet 73E, and the second cover layer 92 may be continuously joined even if the entire adjacent layers are continuously joined as long as they can be expanded and contracted as a unit. It may be joined intermittently. Further, the integration method shown in Japanese Patent Application Laid-Open No. 2004-532758 and JP-A-2016-189826 is adopted, and the upper elastic sheet 71E and the lower elastic sheet are sandwiched between the first cover layer 91 and the second cover layer 92. Ultrasonic sealing is performed in a scattered pattern with the 73E sandwiched between them, and the first cover layer 91 and the second cover layer 92 are joined through the through holes formed in the upper elastic sheet 71E and the lower elastic sheet 73E at a large number of joints. It may be (not shown).

In the main body circumference constituent region 70, the lower edge of the upper elastic sheet 71E coincides with the lower edge of the upper region 71, and the upper edge of the lower elastic sheet 73E coincides with the upper edge of the lower region 73. Further, the upper region 71 is an elastic region that is extensible and contractable in the width direction WD by the upper elastic sheet 71E, and the lower region 73 is an elastic region that is extensible and contractable in the width direction WD by the lower elastic sheet 73E. The intermediate region 72 is a region that does not have an elastic material, or even if it has an elastic material, it does not shrink in the width direction WD due to the elastic material. The upper region 71 and the lower region 73 are manufactured by a known method of integrating the upper elastic sheet 71E and the lower elastic sheet 73E with the first cover layer 91 and the second cover layer 92 in a state of being extended in the width direction WD at the time of manufacture. can. As described above, assuming that the upper region 71 and the lower region 73 of the waist circumference constituent region 70 are the stretchable regions and the intermediate region 72 is the non-stretchable region, as shown in FIG. 8B, the upper region 71 and the lower region 73 The intermediate region 72 can be recessed to the back side by contraction (recess 72S). Therefore, as shown in FIG. 9, a recess 72S mainly composed of the intermediate region 72 can be formed on the inner surface of the waist circumference constituent region 70 unless the upper region 71 and the lower region 73 are extended to the expanded state at the time of mounting. It fits well on the curved surface of the body surface (particularly the curved surface along the iliac crest), and the contact pressure on the top of the curved surface is unlikely to increase. Moreover, due to the elasticity of the upper region 71 and the lower region 73, the elasticity in the waist circumference direction is also exhibited, and a good fit is exhibited as a whole.

As shown in FIG. 2 and the like, the upper elastic sheet 71E is a member common to the left and right, which is continuous in the width direction WD from one waist circumference constituent area 70 in the width direction WD to the other waist circumference constituent area 70, and is lower elastic. The sheet 73E is individually provided in one waist circumference constituent area 70 and the other waist circumference constituent area 70 on both sides in the width direction, and a portion having no lower elastic sheet 73E is provided in a region overlapping with the absorber 56. It is preferable that it is. In this way, by making the upper elastic sheet 71E a common member continuous to the left and right waist circumference constituent areas 70, not only the waist circumference constituent area 70 but also the portion between them is contracted expandably in the width direction WD. This will improve the fit of the rear end (waist edge) of the tape-type disposable diaper. On the other hand, if the lower elastic sheet 73E is individually provided in the left and right waist circumference constituent regions 70 and a non-stretchable region is formed in the region overlapping with the absorber 56, the fit of the portion having the absorber 56 is improved. In the illustrated example, the upper elastic sheet 71E is located only in the end flap portion EF, but is arranged so as to extend from the end flap portion EF to the rear end portion of the absorber 56 as in the waist elastic sheet 75 described later. This is preferable because the rear end portion of the absorber 56 is firmly pressed against the body. As described above, in the width direction WD, the upper elastic sheet 71E may extend to the outside of the upper region 71, and the lower elastic sheet 73E may extend to the outside of the lower region 73.

Of course, as shown in FIG. 10A, both the upper elastic sheet 71E and the lower elastic sheet 73E can be individually provided in the left and right waist circumference constituent areas 70. Further, in that case, as shown in FIG. 10B, a separate waist elastic sheet 75 is arranged between the left and right upper elastic sheets 71E and the lower elastic sheet 73E, and not only the waist circumference constituent area 70 but also the space between them is arranged. It is also possible to ensure the fit of the rear end portion (waist edge portion) of the tape-type disposable diaper by contracting the tape-type disposable diaper so as to be expandable in the width direction WD including the portion. The waist elastic sheet 75 may be located only on the end flap portion EF, but if it is arranged so as to extend from the end flap portion EF to the rear end portion of the absorber 56 as shown in the illustrated example, the absorber 56 may be located. It is preferable because the rear end is firmly pressed against the body.

The portion of the upper elastic sheet 71E that overlaps with the absorber 56 and the portion of the waist elastic sheet 75 that overlaps with the absorber 56 are arranged between the liquid impermeable sheet 11 and the absorbent element 50 in the illustrated example. The arrangement is not particularly limited. For example, the portion of the upper elastic sheet 71E that overlaps with the absorber 56 and the portion of the waist elastic sheet 75 that overlaps with the absorber 56 may be arranged between the liquid impermeable sheet 11 and the exterior nonwoven fabric 12.

The positional relationship between the upper elastic sheet 71E, the lower elastic sheet 73E, and the connecting tape 13 can be appropriately determined. As shown in the illustrated example, the tape mounting portion 13C extends from the front-rear direction position corresponding to the upper end portion of the upper region 71 in the waist circumference constituent area 70 to the front-rear direction position corresponding to the lower end portion of the lower region 73. This is one preferred form. As a result, when the tape main body portion 13B is picked and pulled, the force is directly transmitted to both the upper region 71 and the lower region 73. As a result, the upper region 71 and the lower region 73 of the waist circumference constituent area 70 can be pulled in a well-balanced manner at the time of mounting, and appropriate mounting becomes easier. From the same viewpoint, it is preferable that the center of the anteroposterior LD of the tape mounting portion 13C and the center of the anteroposterior LD in the intermediate region 72 are aligned with each other as shown in the illustrated example.

The upper elastic sheet 71E and the lower elastic sheet 73E may overlap with the tape mounting portion 13C of the connecting tape 13, but if they are arranged inside the WD in the width direction without overlapping, the tape mounting portion of the connecting tape 13 may be overlapped. It is preferable because 13C does not shrink unnecessarily.

The dimensions of the upper region 71, the lower region 73, and the intermediate region 72 can be appropriately determined. For example, the anteroposterior dimension of the upper region 71 can be 15 to 30% of the anteroposterior dimension of the waist circumference constituent area 70, and the anteroposterior dimension of the lower region 73 is 15 to 15 to the anteroposterior dimension of the waist circumference constituent area 70. It can be 30%, and the anteroposterior dimension of the intermediate region 72 can be 30 to 60% of the anteroposterior dimension of the waist circumference constituent area 70.

(Three-dimensional deformation area)
As shown in FIGS. 1, 6 and 8, the intermediate region 72 is provided with a three-dimensional deformation region 90. That is, in the three-dimensional deformation region 90, the intermediate elastic sheet 93 having a size extending inside and outside the three-dimensional deformation region 90, the first cover layer 91 covering the front side of the intermediate elastic sheet 93, and the second cover layer 92 covering the back side. Is integrated with. The first cover layer 91 and the second cover layer 92 may be formed of the same members as the upper region 71 and the lower region 73, or may be different from each other. The materials or members that can be used for the intermediate elastic sheet 93 are the same as those for the upper elastic sheet 71E and the lower elastic sheet 73E. Further, the integration of the intermediate elastic sheet 93 with the first cover layer 91 and the second cover layer 92 is the integration of the upper elastic sheet 71E and the lower elastic sheet 73E with the first cover layer 91 and the second cover layer 92. The same method can be adopted.

The first cover layer 91 and the second cover layer 92 in the three-dimensional deformation region 90 are provided with a plurality of slit portions 95, 96 made of slits or perforations for forming the slits. These slit portions 95 and 96 extend from one edge portion of the three-dimensional deformation region 90 to the other edge portion across the three-dimensional deformation region 90 and intersect each other. Then, all the portions of the first cover layer 91 and the second cover layer 92 located in the three-dimensional deformation region 90 are continuous with the portions located outside the three-dimensional deformation region 90 without passing through the slit portions 95 and 96. is doing. As a result, in the three-dimensional deformation region 90 of this example, as shown in the example shown in FIG. 12A, the first cover layer 91 and the second cover layer 91 and the second cover layer 91 so that the plurality of slit portions expand larger as they approach the intersection positions thereof. With the deformation of the cover layer 92, the intermediate elastic sheet 93 can be elastically stretched according to the expansion of the slit portions 95 and 96.

In other words, in the three-dimensional deformation region 90, when a force from one side to the other side in the thickness direction is applied to the three-dimensional deformation region 90 as shown by an arrow in FIG. 12B, the three-dimensional deformation region 90 Following this, can be deformed so as to be recessed with respect to the peripheral portion while extending mainly in a plurality of directions orthogonal to the slit portions 95 and 96. Therefore, if the three-dimensional deformation region 90 that is dented and deformed is provided in the intermediate region 72 of the waist circumference constituent area 70, the upper region 71 and the lower region 73 of the waist circumference constituent region 70 are extended to some extent, and the waist circumference is extended to some extent. Even in a mounted state in which the recess 72S of the constituent region 70 is almost eliminated, the three-dimensional deformation region 90 is recessed to ensure a good fit. Further, since the three-dimensional deformation region 90 is determined by the plurality of slit portions 95 and 96, the expansion / contraction direction is not limited and the degree of expansion / contraction can be increased as compared with the case of one linear slit. can. Further, all the portions of the first cover layer 91 and the second cover layer 92 located in the three-dimensional deformation region 90 are continuous with the portions located outside the three-dimensional deformation region 90 without passing through the slit portions 95 and 96. Therefore, in the existing manufacturing equipment, it is possible to manufacture by simply providing the slit portions 95 and 96 in the first cover layer 91 and the second cover layer 92.

The intermediate elastic sheet 93 may be integrated with the first cover layer and the second cover layer in a stretched state at the time of manufacture. In that case, in the three-dimensional deformation region 90, as the intermediate elastic sheet 93 shrinks to its natural length, the first cover layer 91 and the second cover layer 92 shrink, and the first cover layer 91 and the second cover layer 92 shrink. Shrinkage wrinkles are formed in. Unlike this, it is also possible to integrate the intermediate elastic sheet 93 with the first cover layer 91 and the second cover layer 92 in a state where the intermediate elastic sheet 93 is not substantially stretched at the time of manufacture. The illustrated example assumes this case, and in the state of natural length, wrinkles (including folds) are not formed in the three-dimensional deformation region 90, and the appearance is good. In particular, by providing only the slit portions 95 and 96 in the first cover layer 91 and the second cover layer 92, the intermediate elastic sheet 93 is neatly arranged by the first cover layer 91 and the second cover layer 92 in the state of natural length. It also has the advantage of being hidden.

The slit portions 95 and 96 may extend not only in the front-rear direction LD and the width direction WD but also in the diagonal direction. Further, as long as the slit portions 95 and 96 extend across the three-dimensional deformation region 90 to the edge portion, they may be linear as shown in the illustrated example, or may be curved such as an arc or a wavy line. The intersection angle of the two slit portions 95 and 96 that intersect each other can be appropriately determined by the size and shape of the three-dimensional deformation region 90 and the arrangement of the slit portions 95 and 96, but usually 90 degrees or the intersection angle. When one of them has an acute angle, it can be 15 degrees or more and less than 90 degrees, particularly 30 to less than 90 degrees. The dimensions of the three-dimensional deformation region 90 can be appropriately determined, but in the normal case, the front-rear direction dimension Y1 can be within the range of about 2 to 7 mm, and the width direction dimension X1 can be within the range of about 4 to 7 mm. As shown in a), the front-rear dimension Y1 is longer than the width direction dimension X1, the width direction dimension X1 is longer than the front-rear direction dimension Y1 (not shown), and the front-rear direction dimension Y1 and the width direction dimension X1 are not shown. Can be the same. The three-dimensional deformation region 90 preferably does not include the end portion of the article on the peripheral edge, but may include a part thereof. The number of slits 95 and 96 is not limited and may be larger than in the illustrated example.

The arrangement of the plurality of slit portions 95 and 96 is not particularly limited. For example, as in each example shown in FIG. 11, some of a plurality of slit portions 95 (example of FIG. 11A) or all of them (slit portions 95 of FIGS. 11B and 11C) are three-dimensionally deformed. It is preferable that both ends extend through the central portion of the region 90 to the edges of the three-dimensional deformation region 90. In this case, the slit portion 95 is radial (X-shaped or cross-shaped) from the central portion of the three-dimensional deformation region 90. When the slit portions 95 are arranged so as to extend radially from the central portion of the three-dimensional deformation region 90 in this way, a wide range of three-dimensional deformation is performed with the minimum number of slit portions 95. The region 90 can be formed. Further, the arrangement of the slit portion 95 is suitable when the three-dimensional deformation region 90 is circular, elliptical, or diamond-shaped.

As shown in the example shown in FIG. 11A, the slit portions 95 and 96 pass through the central portion of the three-dimensional deformation region 90, and the central slit portion 95 having both ends extending to the edge portion of the three-dimensional deformation region 90. It is also preferable to include an end slit portion 96 which passes through the end portion of the central slit portion and whose both ends extend to the edge portion of the three-dimensional deformation region 90. In this case, the slit portions 95 and 96 extend in a T-shape, an H-shape, or the like. Further, the arrangement of the slit portions 95 and 96 is suitable when the three-dimensional deformation region 90 is a triangle or a rectangle. As shown in FIG. 11D, only three or two end slit portions 96 may be provided so as to surround the three-dimensional deformation region 90 in a U-shape or a V-shape.

The slit portions 95, 96 of the first cover layer 91 and the slit portions 95, 96 of the second cover layer 92 may be arranged at the same position (that is, completely overlapped in the thickness direction) with the same dimensions and shape. It is desirable, but it may be slightly off. Further, the slit portions 95 and 96 of the first cover layer 91 and the slit portions 95 and 96 of the second cover layer 92 may have different dimensions and shapes.

The position of the WD in the width direction of the three-dimensional deformation region 90 in the intermediate region 72 is not particularly limited, but it is easy to manufacture if the number of laminated materials of the first cover layer 91 and the second cover layer 92 is one layer, respectively. Therefore, it is preferable. Therefore, in the case of this example, it is preferable that the three-dimensional deformation region 90 is provided inside the tape mounting portion 13C of the connecting tape 13 in the side flap portion SF of the dorsal side portion B in the width direction. In this case, the first cover layer 91 is made of only the gather sheet 62, and the second cover layer 92 is made of only the exterior nonwoven fabric 12.

As in the example shown in FIG. 10B, the three-dimensional deformation region 90 (that is, the intermediate elastic sheet 93 and the slit) may not be provided.

<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.

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

-"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 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 the sample or test piece is pre-dried, it is left in a test room or device in a standard state (the test place is a temperature of 23 ± 1 ° C. and a relative humidity of 50 ± 2%) to bring it into a constant weight state. 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" of the absorber is the thickness measuring instrument of Ozaki Works Paper Gauge (peacock, dial thickness gauge large type, model JB (measurement range 0 to 35 mm) or model K-4 (measurement range 0 to 50 mm)). The sample and the thickness measuring instrument are placed horizontally and measured.
-The "thickness" other than the above is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measuring program) under the conditions of a load of 0.098 N / cm ² and a pressurized area of 2 cm ² .
-"Tensile strength" and "tensile elongation (break elongation)" are based on JIS K7127: 1999 "Plastic-Test method for tensile properties-" except that the test piece has a rectangular shape with a width of 35 mm and a length of 80 mm. It means a value measured with an initial chuck interval (distance between marked lines) of 50 mm and a tensile speed of 300 mm / min. As the tensile tester, for example, AUTOGRAPH AGS-G100N manufactured by SHIMADZU can be used.

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

-"Water absorption rate" is 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. And.

-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.

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

INDUSTRIAL APPLICABILITY The present invention is used for a stretchable structure in all disposable wearing articles such as various disposable diapers such as pants type and pad type, sanitary napkins, disposable wearing articles for swimming and playing in the water, in addition to the tape type disposable diapers as in the above example. It can be done.

10 ... Leg circumference edge, 11 ... Liquid permeable sheet, 12 ... Exterior non-woven fabric, 13 ... Connecting tape, 13A ... Connecting part, 13B ... Tape body part, 13C ... Tape mounting part, 20 ... Target sheet, 30 ... Top sheet , 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rising gather, 62 ... Gather sheet, 70 ... Waist circumference constituent area, 71 ... Upper area, 71E ... Upper elastic sheet, 72 ... Intermediate region, 72S ... Recess, 73 ... Lower region, 73E ... Lower elastic sheet, 75 ... Waist elastic sheet, 80 ... Laminated stretchable body, 90 ... Three-dimensional deformation region, 91 ... First cover layer, 92 ... Second cover Layer, 93 ... Elastic sheet, 95, 96 ... Slit part, 95 ... Central slit part, 96 ... End slit part, B ... Back side part, F ... Ventral part, LD ... Front-back direction, SF ... Side flap part, WD … In the width direction.

Claims (6)

It has a crotch part including the center in the anterior-posterior direction, a ventral part extending anteriorly from the center in the anterior-posterior direction, and a dorsal part extending posteriorly from the center in the anterior-posterior direction.
It has an absorber built in the range including the crotch part, and has an absorber.
The ventral portion and the dorsal portion have side flap portions extending to the left and right sides of the absorber.
The side flap portion of the dorsal portion has a leg peripheral edge extending laterally toward the rear and a waist circumference constituent region located posterior to the leg peripheral edge.
A connecting means for detachably connecting to the ventral portion is provided in the waist circumference constituent region of the dorsal portion.
In tape-type disposable diapers
The waist circumference constituent region of the dorsal portion has three regions, an upper region, an intermediate region, and a lower region.
A first cover that covers the upper elastic sheet provided in the upper region, the lower elastic sheet provided in the lower region, the upper region, the intermediate region, and the lower region, and covers the front side of the upper elastic sheet and the lower elastic sheet. It has a layer and a second cover layer that covers the upper region, the intermediate region, and the lower region and covers the back side of the upper elastic sheet and the lower elastic sheet.
The lower edge of the upper elastic sheet coincides with the lower edge of the upper region, and the upper edge of the lower elastic sheet coincides with the upper edge of the lower region.
The elastic sheet, the first cover layer and the second cover layer are integrated.
The first cover layer and the second cover layer do not have elasticity and do not have elasticity.
The upper region is an expansion / contraction region that is extensible and contracted in the width direction by the upper elastic sheet.
The lower region is an expansion / contraction region that is extensible and contracted in the width direction by the lower elastic sheet.
The intermediate region does not have an elastic material, or even if it has an elastic material, it does not shrink in the width direction due to the elastic material.
The intermediate region has an integrated intermediate elastic sheet sandwiched between the first cover layer and the second cover layer, and the first cover layer, the second cover layer, and the intermediate elastic sheet overlap each other. It has a three-dimensional deformation area in the area,
The first cover layer and the second cover layer in the three-dimensional deformation region are provided with a plurality of slit portions made of slits or perforations for forming the slits.
The plurality of slit portions extend from one edge portion of the three-dimensional deformation region to the other edge portion across the three-dimensional deformation region.
The plurality of slits intersect with each other and
All of the portions of the first cover layer and the second cover layer located in the three-dimensional deformation region are continuous with the portions located outside the three-dimensional deformation region without passing through the slit portion.
A tape-type disposable diaper that features this. The absorber extends posteriorly to at least between the lower regions.
The upper elastic sheet is a member common to the left and right, which is continuous in the width direction from one waist circumference constituent area in the width direction to the other waist circumference constituent region.
The lower elastic sheet is individually provided in one waist circumference constituent area and the other waist circumference constituent area on both sides in the width direction.
A portion that does not have the lower elastic sheet is provided in the region that overlaps with the absorber.
The tape-type disposable diaper according to claim 1. The connecting means connects the tape mounting portion fixed to the waist circumference constituent region, the tape main body portion protruding from the tape mounting portion, and the ventral side portion provided in the widthwise intermediate portion of the tape main body portion. It is a connecting tape with a part and
The tape mounting portion extends from a front-rear direction position corresponding to the upper end portion of the upper region in the waist circumference constituent area to a front-rear direction position corresponding to the lower end portion of the lower region.
The tape-type disposable diaper according to claim 1 or 2. In the three-dimensional deformation region, in the state of natural length, the shrinkage wrinkles formed by the shrinkage of the intermediate elastic sheet are not formed in the first cover layer and the second cover layer.
The tape-type disposable diaper according to any one of claims 1 to 3 . The slit portion includes a plurality of slit portions that pass through the central portion of the three-dimensional deformation region and have both ends extending to the edges of the three-dimensional deformation region.
The tape-type disposable diaper according to any one of claims 1 to 4 . The slit portion passes through the central portion of the three-dimensional deformation region, the central slit portion whose both ends extend to the edge portion of the three-dimensional deformation region, and the end portion of the central slit portion, and both ends thereof are three-dimensional. Including an end slit portion extending to the edge of the deformed region,
The tape-type disposable diaper according to any one of claims 1 to 4 .

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