JP6860399B2 - Tape type disposable diapers - Google Patents

Description

The present invention relates to so-called tape-type disposable diapers.

There are three main types of disposable diapers: tape type, pants type, and pad type. Of these, the tape-type disposable diaper is applied to the body in the unfolded state, and then the connecting portions provided on the left and right sides of the dorsal portion are connected to the front target sheet attached to the outer surface of the ventral portion. It is for mounting.

On the other hand, in disposable diapers, decorative printing such as characters and patterns is provided on a liquid-impermeable sheet that covers the back side of the absorber so that it can be visually recognized from the outer surface of the product.

However, the tape-type disposable diaper has a front target sheet on the outer surface of the ventral side, and this front target sheet has a constant width in the front-rear direction and occupies a relatively large range on both the left and right sides. In the area occupied by the sheet, even if the liquid-impermeable sheet has decorative printing, it is hidden by the front target sheet. In other words, in conventional tape-type disposable diapers, the decorative area of the liquid-impermeable sheet is reduced by the front target sheet.

This problem can be improved by providing a pair of left and right front target sheets at intervals in the width direction and leaving an area having no front target sheet in the central portion in the width direction (see, for example, Patent Document 1). There is a risk that the mounting position of the front target sheet will shift, which makes it difficult to manufacture.

Japanese Unexamined Patent Publication No. 2014-104148

Therefore, a main object of the present invention is to expand the decorative area of the liquid-impermeable sheet without impairing the ease of manufacture.

A typical aspect of the present invention that solves the above problems is as follows.
<First aspect>
It has a ventral portion extending anteriorly from the center in the anterior-posterior direction and a dorsal portion extending posteriorly from the center in the anterior-posterior direction.
It has an absorber provided from the ventral side portion to the dorsal side portion, a liquid-permeable top sheet that covers the front side of the absorber, and a liquid-impermeable sheet that covers the back side of the absorber.
The front target seat provided on the outer surface of the waist circumference of the ventral portion and
It has connecting portions provided on the left and right sides of the waist circumference portion of the dorsal portion and which are detachably connected to the front target seat.
For tape-type disposable diapers
The front target sheet is continuous over the left and right sides of the ventral portion.
The trailing edge of the front target sheet has at least one recessed portion on the front side.
A decorative print is provided in the area of the liquid-impermeable sheet surrounded by the recesses of the front target sheet.
A tape-type disposable diaper that features this.

(Action effect)
In this embodiment, the trailing edge of the front target sheet has at least one recess on the front side, and the liquid-impermeable sheet in the area surrounded by the recess has decorative printing, as in the conventional case. The decorative area of the liquid-impermeable sheet is expanded by the area of the recess provided in the front target sheet without dividing the front target sheet into a plurality of parts. Therefore, the ease of manufacture is not impaired.

<Second aspect>
A part of the front target sheet in the front-rear direction is linearly continuous in the width direction.
The tape-type disposable diaper of the first aspect.

(Action effect)
When a recess is provided on the trailing edge of the front target sheet, if the recess is too deep and the front target sheet does not have a portion that is linearly continuous in the width direction, the connecting portion is connected to the front target sheet in the width direction range having the recess. It cannot be positioned above and may not be firmly connected. On the other hand, when a part of the front target sheet in the front-rear direction is linearly continuous in the width direction as in this embodiment, the connecting portion is placed on the front target sheet even in the width direction range having a recess. It can be positioned reliably, and more reliable connection is possible.

<Third aspect>
The front target sheet has a center region located at the center in the width direction and side regions located on the left and right sides of the center region.
The concave portion is provided at one position on the trailing edge of the center region, and a convex portion protruding forward is provided at a position corresponding to the concave portion on the front edge of the center region.
The side area extends in the width direction with a predetermined anteroposterior dimension, and the front edge of the side area is separated from the front end of the diaper to the rear side.
The tape-type disposable diaper of the first or second aspect.

(Action effect)
In this way, by providing a recess in the center area that is rarely used for connection in the front target sheet and not providing a recess in the side area, the side area that is normally used in the front target sheet can be connected in the same manner as before. , The decorative area of the liquid permeable sheet can be expanded by the center area. In addition, by having a convex portion protruding forward at a position corresponding to the concave portion in the center region, the change in the front-rear direction dimension is reduced over the entire width direction of the front target sheet, and the front target sheet can be easily attached at the time of manufacturing. At the same time, the portion on the waist side of the connecting position of the connecting portion is less likely to bend.

<Fourth aspect>
The front edge of the front target sheet has a convex portion at a position in the width direction corresponding to the concave portion.
The convex portion of the front target sheet has a first portion that coincides with the front end of the diaper, and the second portion of the front target sheet other than the portion that coincides with the front end of the diaper is separated from the front edge of the diaper to the rear side. It is a part to do
The waist circumference portion of the dorsal side portion has a back target sheet at a position in the width direction corresponding to the first portion of the front target sheet.
The entire trailing edge of the back target sheet coincides with the trailing edge of the diaper.
With the front edge of the ventral portion and the posterior edge of the dorsal portion abutted, the front edge of the ventral portion and the posterior edge of the dorsal portion coincide with each other.
The shape of the front edge of the entire area including the front target sheet and the back target sheet matches the shape of the rear edge of the front target sheet.
A tape-type disposable diaper according to any one of the first to third aspects.

(Action effect)
The tape-type disposable diaper can be manufactured by cutting a continuum in which individual diaper portions repeat in the MD direction at the boundary between the individual diaper portions at intervals in the MD direction. In this case, the anterior edge of the ventral portion and the posterior edge of the dorsal portion are formed by cutting, so that the anterior edge of the ventral portion and the posterior edge of the dorsal portion coincide with each other when they are butted against each other. Become.
On the other hand, as described above, since the front edge of the front target sheet has a convex portion protruding forward at a position corresponding to the concave portion of the rear edge, the change in the front-rear direction dimension is reduced over the entire width direction of the front target sheet. , The front target sheet can be easily attached at the time of manufacturing, and the waist side portion from the connecting position of the connecting portion is less likely to bend.
However, if the convex portion is simply provided, the area having the front target sheet becomes wide, so that the flexibility and air permeability of the ventral portion may decrease.
On the other hand, in this embodiment, the undivided target sheet having the shape of the front target sheet and the back target sheet combined in the manufacturing is the ventral portion of one diaper portion adjacent to the MD direction and the other diaper portion. A method can be adopted in which the undivided target sheet is divided into a front target sheet and a back target sheet by arranging the diapers so as to straddle the back side portion of the diaper and then cutting at the boundary of each diaper portion. Since the undivided target sheet has a large size in the front-rear direction at the time of mounting, it is excellent in ease of mounting, and since the size in the front-rear direction is reduced in the product, it is possible to suppress a decrease in flexibility and breathability of the ventral portion.
Further, in this embodiment, since the shape of the front edge of the entire area including the front target sheet and the back target sheet matches the shape of the trailing edge of the front target sheet, the front target sheet and the back target sheet are combined. Trim (waste material) is generated by cutting a continuum in which the portion of the shape that becomes the undivided target sheet repeats in the MD direction at the boundary of each portion that becomes the undivided target sheet at intervals in the MD direction. It also brings the advantage of being able to manufacture undivided target sheets without.
As will be described later, the back target sheet can be used to fix the back target sheet in a rolled state at the time of disposal before or after use. In particular, in the form of having a waist elastic sheet around the waist of the dorsal part, shrinkage wrinkles are formed on the outer surface of the dorsal part, so that the fixing of the connecting part tends to be insufficient, but having a back target sheet. Therefore, the connecting portion can be firmly fixed.

<Fifth aspect>
At least the waist circumference of the ventral portion has a wing portion extending to both the left and right sides and an intermediate portion located between the left and right wing portions.
The intermediate portion is formed of a main body having the top sheet, a liquid-impermeable sheet, and an absorber.
The wing portion of the ventral portion is a portion where the front target sheet protrudes from the side edge of the main body.
A tape-type disposable diaper according to any one of the first to fourth aspects.

(Action effect)
When providing the wing part on the ventral side, the wing part is provided by extending the sheet of the main body to the side around the waist of the ventral part, and the sheet of the main body is not extended and the shape of the main body is made almost rectangular. Until now, a method is known in which a sheet for forming a wing portion is separately attached to the side portion of the waist circumference of the main body. For the former, it is necessary to cut the seat of the main body along the circumference of the legs. The latter has advantages such as being able to omit material cutting and adopting a dedicated material suitable for the wing portion, but it is inevitable that the cost will increase due to the addition of the material. On the other hand, in the case of this embodiment, since the wing portion is formed only by the front target sheet, it is not necessary to cut the side portion of the main body, and it is not necessary to use a material dedicated to the wing portion, which is preferable.

<Sixth aspect>
The front target sheet has a resin film and a thread sewn on the resin film.
The connecting portion is a hook material for a mechanical fastener.
At least the back surface of the front target sheet protruding from the side edge of the main body is made of a non-woven fabric.
The tape-type disposable diaper of the fifth aspect.

(Action effect)
The combination of a front target sheet in which a thread is sewn on a resin film and a connecting portion made of a hook material of a mechanical fastener is currently widely used, and such a front target sheet is projected from the side edge of the main body. As a result, when the wing portion is formed around the waist of the ventral portion, the resin film comes into contact with the skin. Therefore, as in this embodiment, at least the back surface of the portion of the front target sheet that protrudes from the side edge of the main body is It is desirable that it is made of non-woven fabric.

As described above, according to the present invention, there are advantages such as being able to expand the decorative area of the liquid-impermeable sheet without impairing the ease of manufacture.

It is a top view which shows the inner surface of a tape type disposable diaper, and only the main body is unfolded. It is a top view which shows the outer surface of a tape type disposable diaper, and only the main body is unfolded. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. (A) is a sectional view taken along line 7-7 of FIG. 1, and (b) is a sectional view taken along line 8-8 of FIG. (A) is a plan view of a waist elastic sheet, and (b) is a sectional view of a waist elastic sheet. 9-9 is a cross-sectional view taken along the line 9-9 of FIG. It is a top view which shows the outer surface of a tape type disposable diaper, and only the main body is unfolded (the side panel is a natural length state). (A) is a plan view of a side panel, and (b) is a sectional view of a side panel. It is a perspective view which shows the example of how to roll a tape type disposable diaper. It is a top view which shows the manufacturing process of the front target sheet. It is a top view which shows the attachment process of the front target sheet of a tape type disposable diaper, and the cutting process to each diaper.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The dotted pattern portion in the cross-sectional view shows a hot melt adhesive that joins each component, but instead of the hot melt adhesive, another adhesive may be used, or welding of heat seal, ultrasonic seal, etc. may be used. Needless to say, it may be joined by using. Further, in the following description, the "front-back direction LD (vertical direction)" means a direction connecting the ventral side (front side) and the dorsal side (rear side), and the "width direction WD" means a direction orthogonal to the front-back direction. It means (horizontal direction).

1 to 7 show an example of a tape-type disposable diaper. This tape-type disposable diaper has a ventral portion F extending anteriorly from the center C in the anteroposterior direction and a dorsal portion B extending posteriorly from the center C in the anteroposterior direction. It is provided with a front target seat provided on the outer surface of the portion and connecting portions provided on both left and right sides of the waist circumference portion of the back side portion and which are detachably connected to the front target seat. In the examples shown in FIGS. 1 and 2, the waist circumference of the ventral portion F and the dorsal portion B has a wing portion WP extending to both the left and right sides (located laterally from the side edge on the crotch side). However, the ventral portion F and the dorsal portion B have an intermediate portion CP located between the left and right wing portions WP (in other words, the middle of the anteroposterior LD is constricted so that the side edge is along the leg circumference). Although it is in the form, both the ventral portion F and the dorsal portion B do not have the wing portion WP, or the dorsal portion B has the wing portion WP but the ventral portion F has the wing portion WP. It is also possible to have a form that does not have.

(Main body)
In the examples shown in FIGS. 1 and 2, the intermediate portion CP, the portion of the wing portion WP of the dorsal portion B excluding a part on the distal end side, and the wing portion WP of the ventral portion F are the absorber 56 and the absorber 56. It is formed of a sheet of the main body 10 having a liquid-permeable top sheet 30 that covers the front side of the body and a liquid-impermeable sheet 11 that covers the back side of the absorber 56. The main body 10 includes an end flap portion EF that extends to the front and rear sides of the absorber 56 and does not have the absorber 56, and a side flap portion SF that extends laterally from the absorber 56 and does not have the absorber 56. Have.
As shown in the examples shown in FIGS. 1, 2 and 8, the intermediate portion CP is formed by the main body 10, and the wing portion WP of the dorsal portion B and the wing portion WP of the ventral portion F are formed on both sides of the main body 10. It may be formed of a component different from the attached main body 10.

More specifically, in the illustrated example, the entire outer surface of the main body 10 is formed by the exterior sheet 12, and the liquid impermeable sheet 11 is fixed to the inner surface side of the main body 10 with an adhesive such as a hot melt adhesive, and further, this liquid. An absorbing element 50 including an absorber 56, an intermediate sheet 40, and a top sheet 30 are laminated in this order on the inner surface side of the impermeable sheet 11. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction LD and the width direction WD than the absorption element 50, and have side edges of the absorption element 50 in the top sheet 30. The peripheral portion that protrudes from the side edge of the absorbing element 50 in the liquid impermeable sheet 11 is fixed to the peripheral edge that protrudes from the side edge by a hot melt adhesive or the like. This portion becomes a part of the end flap portion EF and the side flap portion SF.

Further, rising gathers 60, 60 that stand up on the skin side of the wearer are provided on both sides of the WD in the width direction on the surface of the main body 10, and the gather sheets 62, 62 forming the rising gathers 60, 60 are tops. It extends from both side portions of the seat 30 to each side flap portion SF.

Hereinafter, the materials and characteristic parts of each part will be described in order.
(Exterior sheet)
The exterior sheet 12 is provided so that the back surface of the disposable diaper has a cloth-like feel and appearance. Nonwoven fabric is suitable as the exterior sheet 12, but the exterior sheet 12 is not limited to this. The type of non-woven fabric is not particularly limited, and as the material fiber, for example, olefin-based fibers such as polyethylene or polypropylene, polyester-based synthetic fibers such as polyamide-based fibers, recycled fibers such as rayon and cupra, and natural fibers such as cotton are used. As the 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 in terms of both feel and strength. The non-woven fabric can be used alone or in layers. In the latter case, it is preferable to bond the non-woven fabrics 12 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 . The exterior sheet 12 can be omitted, in which case the liquid-impermeable sheet 11 can be exposed on the back surface of the disposable diaper.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but is substantially, for example, an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a waterproof film. Examples thereof include a non-woven fabric that ensures liquid impermeableness (in this case, the waterproof film and the non-woven fabric form a liquid-impermeable sheet). Of course, in addition to this, a material having liquid impermeableness and moisture permeability, which has been favorably used from the viewpoint of preventing stuffiness in recent years, can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, the sheet is molded, and then stretched in the uniaxial or biaxial direction. The microporous sheet obtained in the above can be exemplified. Furthermore, it is waterproofed by a non-woven fabric using microdenyl fibers, strengthening of leakage resistance by reducing the voids of the fibers by applying heat or pressure, and coating with a highly water-absorbent resin or hydrophobic resin or water repellent. A liquid-impermeable sheet without using a film can also be used as the liquid-impermeable sheet 11.

The liquid-impermeable sheet 11 of the illustrated example is slightly wider than the top sheet 30 and narrower than the exterior sheet 12, but the liquid-impermeable sheet 11 is not limited to this, and the liquid-impermeable sheet 11 is the exterior sheet 12. It can be changed as appropriate, such as having the same width.

Decorative prints 11a and 11b that are visible from the outer surface are applied to at least one of the front and back surfaces of the liquid-impermeable sheet 11. The types, shapes, and dimensions of the decorative prints 11a and 11b are not particularly limited. The decorative prints 11a and 11b are continuous decorative prints 11a composed of characters (size, brand name, maker name, pattern name, etc.) that are regularly repeated in the front-back direction LD and the width direction WD, and a large number of structural units such as a pattern. In addition, there is an intermittent decorative print 11b that is arranged only on one or both of the front and back of the product, such as a product logo, a picture of a character, a photograph, etc., and either one or both can be adopted.

(Top sheet)
As the top sheet 30, a liquid-permeable material such as a perforated or non-perforated non-woven fabric or a porous plastic sheet can be used. The raw material fiber of the non-woven fabric is not particularly limited. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based fibers, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the span lace method is preferable, and if bulkiness and softness are required, the thermal bond method is preferable.

The top sheet 30 may be made of one sheet or may be made of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

The top sheet 30 of the illustrated example extends laterally from the side edge of the absorber 56, but is not limited to this, and may extend to the side edge of the exterior sheet 12, and in a form having rising gathers. As long as it extends to the base of the rising gather, it may be appropriately changed such that it may extend only to the inside in the width direction from the side edge of the absorber.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the top sheet 30 and the absorbing element 50 in order to move the excrement that has passed through the top sheet 30 to the absorber and prevent reversion. The intermediate sheet 40 not only rapidly transfers excrement to the absorber to enhance the absorption performance by the absorber, but also prevents the absorbed excrement from returning from the absorber and makes the surface of the top sheet 30 feel soft. It is something to improve. The intermediate sheet 40 may be omitted.

The material of the intermediate sheet 40 is not particularly limited, and for example, the same material as the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30, and when heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 is preferably one having a melting point similar to that of the top sheet 30. Further, considering that the solid content in the stool is permeated, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue on the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 is unlikely to be generated, but the solid content of the stool is difficult to permeate. Therefore, the fiber of the non-woven fabric used for the intermediate sheet 40 preferably has a fineness of about 2.0 to 5.0 dtex. The intermediate sheet 40 can also be a mesh film or the like in which a large number of pores are provided in a film material such as polyethylene.

The intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorbing element 50, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the total length of the diaper, may be the same as the length of the absorbing element 50, or may be within a short length range centered on the region for receiving the liquid.

(Absorption element)
The absorbing element 50 is a portion that absorbs and holds a liquid such as urine or loose stool, and has an absorber 56 and a packaging sheet 58 that encloses the entire absorber 56 in the illustrated example. The packaging sheet 58 may be omitted if necessary, such as when the absorber 56 is excellent in shape retention. In that case, the absorbent element 50 is composed of only the absorber 56. The absorbing element 50 can be adhered to the inner surface of the liquid impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface thereof.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. The fiber aggregate is obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and by opening the tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately 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 fibers per 2.54 cm , preferably 10 to 50 fibers, and more preferably about 15 to 50 fibers. Further, in many cases, uniformly crimped crimped fibers are used. It is preferable to disperse and hold the highly absorbent polymer particles in the absorber 56.

In addition to having a rectangular shape as shown in the illustrated example, it is preferable that the absorber 56 has an hourglass shape having a constricted portion narrower than both front and rear sides in the middle in the front-rear direction because the fit around the legs is improved.

The size of the absorber 56 can be appropriately determined as long as it extends to the front, back, left, and right of the urination port position, but it is preferable that the absorber 56 extends to the vicinity of the peripheral edge of the main body 10 in the front-rear direction LD and the width direction WD. Reference numeral 56X indicates the total width of the absorber 56, reference numeral 10X indicates the total width of the main body 10, and reference numeral 10L indicates the total length of the main body 10 (equal to the total length of the diaper in the illustrated form).

(Highly absorbent polymer particles)
The absorber 56 may contain highly absorbent polymer particles in part or all of it. The highly absorbent polymer particles include "powder" in addition to "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, sieving (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 sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006), the proportion of particles remaining on the 500 μm standard sieve is 30% by weight or less, and the 180 μm standard sieve. It is desirable that the proportion of particles remaining on the top is 60% by weight or more.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose. A substance or an acrylic acid (salt) polymer or the like can be used. As the shape of the highly absorbent polymer particles, a 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, a phenomenon (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 amount of absorption required for the application 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. Above 350 g / m ² , the effect saturates.

(Packaging sheet)
When the packaging sheet 58 is used, as the material thereof, 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 SMS non-woven fabric (SMS, SMSMS, etc.) is particularly suitable, and polypropylene, polyethylene / polypropylene composite material, or the like can be used as the material. The basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoint of ease of manufacture and prevention of leakage of highly absorbent polymer particles from the front and rear edge edges, a cylinder is provided so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable that the components are wound in a shape, the front and rear edges thereof are projected from the front and rear of the absorber 56, and the overlapping portions and the overlapping portions of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Side gather)
As shown in FIGS. 2 and 3, in order to improve the fit of the leg peripheral portion located in the middle of the front-rear LD in the side portion of the main body 10, the sheet layers in the middle of the front-rear LD of the side flap portion SF (in the illustrated example). A side elastic member 70 extending in the front-rear direction LD is provided between the gather sheet 62 and the liquid-impermeable sheet 11), and due to the expansion and contraction of the side elastic member 70, the portion having the side elastic member 70 is provided in the front-rear direction. It is designed to expand and contract to LD.

(Get up gather)
In order to block urine and loose stools moving laterally on the top sheet 30 and prevent lateral leakage, both sides of the widthwise WD of the surface of the disposable diaper stand up from the side of the top sheet 30 toward the skin (protrusion). The rising gather 60 is provided over the entire front-rear direction.

In the raised gather 60 of the illustrated example, the root portion 65 fixed to the region including the side flap portion SF, the protruding portion 66 extending from the root portion 65, and both ends of the protruding portion in the front-rear direction are fixed in an inverted state. Gather elasticity fixed in a state of being extended in the front-rear direction to at least the tip portion of the raised portion 67 and the non-fixed raised portion 68 located between the front and rear inverted portions of the protruding portion 66. It has a member 63. The rising gather 60 is formed of a gather sheet 62 folded at the tip, a water-repellent non-woven fabric can be used as the gather sheet 62, and an elongated elastic member such as rubber thread is used as the gather elastic member 63. be able to. As shown in FIGS. 1 and 2, a plurality of gather elastic members 63 may be provided at intervals, or one each may be provided. The elongation rate of the portion having the gathered elastic member 63 is not particularly limited, but is usually preferably 150 to 350%, more preferably 200 to 300%.

The root portion 65 of the rising gather 60 in the illustrated example is provided only on the side flap portion SF, and is joined to the side portion of the liquid impermeable sheet 11 and the side portion of the exterior sheet 12, but the side flap portion SF May extend from to the side of the region overlapping the absorber 56.

In the protruding portion 66 of the rising gather 60, both ends of the LD in the front-rear direction are inverted portions, but the portion between them is a non-fixed rising portion 68, and the rising portion 68 is a contraction of the gather elastic member 63. You will be able to stand up by force. When the diaper is attached, the diaper is attached to the body in a boat shape, and the contraction force of the gather elastic member 63 acts. Therefore, the contraction force of the gather elastic member 63 causes the gather 60 to stand up and elastically adhere to the legs. .. As a result, so-called lateral leakage from around the legs is prevented.

(Waist elastic sheet)
It is preferable that a band-shaped waist elastic sheet 90 is provided around the waist of the main body 10 in the dorsal portion B so that the dorsal portion B elastically expands and contracts in the width direction WD. The waist telescopic sheet 90 has non-stretchable regions 96 at both ends in the width direction WD, and the portion between these non-stretchable regions 96 is an intermediate stretchable region 95 that expands and contracts in the width direction WD. is there. The waist elastic sheet 90 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 It is preferable because the rear end is firmly pressed against the body.

As the waist elastic sheet 90, a sheet-like elastic member such as a rubber sheet may be used, but it is preferable to use a non-woven fabric from the viewpoint of breathability. In this case, a sheet-like elastic member having breathability such as a stretchable non-woven fabric can be used, but as shown in FIG. 6, two sheet layers 91 such as a non-woven fabric are attached with an adhesive such as a hot melt adhesive. A sheet-like, net-like, elongated (thread-like, string-like, etc.) elastic member 92 with holes between the two sheet layers 91 is preferably fixed in a state of being extended along the width direction WD. .. As the material of the sheet layer 91 in this case, the same material as the exterior sheet 12 can be used. The elongation rate of the elastic member 92 is preferably about 150 to 250%. When an elongated elastic member 92 (thread-like or string-like) is used, it is preferable to provide about 5 to 15 elastic members with a thickness of 420 to 1120 dtex at intervals of 3 to 10 mm in the front-rear direction.

The width of the waist elastic sheet 90 can be appropriately determined, but as shown in the illustrated example, it is preferably the width between the left and right side flap portions SF, and particularly the width between the left and right wing portions WP. Is preferable. As a specific dimension, the width of the waist elastic sheet 90 is preferably about 86 to 94% of the total width 10X of the main body 10.

The dimensions of the intermediate stretchable region 95 and the non-stretchable region 96 in the waist stretchable sheet 90 can be appropriately determined, but the width of the intermediate stretchable region 95 is 55 to 100% of the width between the connecting portions 13A of the left and right side panels 13 described later. The width of the non-stretchable region 96 is preferably about 5 to 20 mm in order to prevent shrinkage and curling when attached to the main body 10. The non-stretchable region 96 may be a region having no elastic member 92, but the non-stretchable region 96 is non-stretchable by attaching the elastic member 92 over the intermediate stretchable region 95 and the non-stretchable region 96 and cutting the elastic member 92 in the non-stretchable region 96. The structure may be such that the elastic member 92 remains in the region 96 but hardly expands or contracts at all.

Further, a part of the elastic member 92 may be arranged so as to cross the absorber 56, but as shown in FIG. 6, a part or the whole of the portion where the elastic member 92 overlaps with the absorber 56 is cut. As a result, if the structure is such that the elastic member 92 remains but hardly expands or contracts at all, the rear end portion of the absorber 56 does not shrink in the width direction, so that the fit is further improved.

In the illustrated form, the waist elastic sheet 90 is arranged between the liquid-impermeable sheet 11 and the absorbing element 50, but the arrangement is not particularly limited. For example, the waist elastic sheet 90 may be arranged between the liquid-impermeable sheet 11 and the exterior sheet 12, or may be provided outside the exterior sheet 12. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet layers, the entire waist elastic sheet 90 may be provided between the sheet layers of the exterior sheet 12.

(Fastener assembly)
The connecting portion 13A is provided on the fastener assembly 13 attached to each of the left and right sides of the main body 10 in the waist circumference portion of the dorsal side portion B. More specifically, the fastener assembly 13 has a fastener fixing portion 13B fixed to the back surface of the main body 10 and a non-fixed fastener free portion 13F extending laterally from the fastener fixing portion 13B. A connecting portion 13A is provided at the tip of the fastener free portion 13F. Unlike the illustrated example, the connecting portions 13A may be provided on the left and right side portions of the main body 10 in the waist circumference portion.

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. When wearing the diaper, the wing portion WP is turned from both sides of the waist to the outer surface of the ventral portion F, and the connecting portion 13A of the wing portion WP is connected to an appropriate position on the outer surface of the ventral portion F.

The fastener fixing portion 13B of the fastener assembly 13 and the main body 10 may be joined by hot melt adhesive or by welding such as ultrasonic sealing or heat sealing.

The fastener assembly 13 includes not only a non-stretchable type (tab type) having no side stretchable region as shown in FIG. 1, but also at least a fastener fixing portion 13B and a connecting portion 13A as shown in FIGS. 8 and 9. It is also possible to adopt a stretchable type (side panel type) having a side stretchable region 13E in which the portion between the stretchable parts stretches in the width direction WD.

The structure of the non-stretchable type fastener assembly 13 is not particularly limited, and known ones can be adopted. In the non-expandable type fastener assembly 13 of the illustrated example, the support piece 13C protruding from the side edge of the main body 10 and the connecting portion provided in the middle of the width direction WD of the portion of the support piece 13C protruding from the side edge of the main body 10. It has 13A and. As the material of the support piece 13C, the same material as that of the telescopic type can be used.

The elongation rate of the side expansion / contraction region 13E in the expansion / contraction type fastener assembly 13 is not particularly limited, but is preferably about 150 to 250%. The structure of the side elastic region 13E is not particularly limited, and at least the side elastic region 13E in the fastener assembly can be formed by using a sheet having elasticity by itself such as a rubber sheet or an elastic non-woven fabric. .. Further, as illustrated in FIG. 6, two sheet layers 13S such as non-woven fabrics are bonded together with an adhesive such as a hot melt adhesive, and a perforated sheet-like, net-like, or elongated shape is formed between the two sheet layers 13S. It is also preferable to form at least the side expansion / contraction region 13E of the side panel 13 by using an elastic member 13G such as (thread-like or string-like) fixed in a stretched state along the width direction WD. In this way, a plurality of elongated elastic members 13G attached to the sheet layer 13S at intervals are not only easy to manufacture because they are widely used in the technical field of disposable diapers, but also the elongated elastic members 13G. There is also an advantage that the shrinkage characteristics of the side panel 13 can be easily adjusted by making the thickness, the number of diapers, the elongation rate, the spacing, and the type of material different. As the material of the sheet layer 13S in this case, the same material as the exterior sheet 12 can be used. Further, when an elongated elastic member 13G (thread-like or string-like) is used, for example, about 5 to 15 elastic members having a thickness of 420 to 1120 dtex can be provided at intervals of 3 to 10 mm in the front-rear direction.

The side telescopic region 13E is provided over the entire width direction WD of the fastener assembly 13 (that is, including the fastener fixing portion 13B and the connecting portion 13A) as long as it is provided at least in a portion between the fastener fixing portion 13B and the connecting portion 13A. However, if the fastener fixing portion 13B or the connecting portion 13A contracts, the coupling portion 13A may be insufficiently connected or the fastener fixing portion 13B may have a poor connection. Therefore, the fastener fixing portion 13B may be used. It is preferably provided in the range of 46 to 100% of the width direction WD range between the connecting portion 13A and the connecting portion 13A. In this case, the fastener fixing portion 13B and the connecting portion 13A may be a region having no elastic member 13G, but the elastic member 13G is attached over the entire width direction WD of the fastener assembly 13, and the fastener fixing portion 13B and the connecting portion 13A are elastic. By cutting the member 13G or the like, the elastic member 13G may remain in the fastener fixing portion 13B and the connecting portion 13A, but the structure may be such that the elastic member 13G hardly expands or contracts at all.

The connecting portion 13A in the telescopic type fastener assembly 13 can be provided on the seat 13S constituting the side telescopic region 13E, but as shown in the illustrated example, a support protruding from the tip of the side telescopic region 13E at the tip of the fastener assembly 13. It is preferable to attach the piece 13C and provide the connecting portion 13A on the support piece 13C because the manufacturing is easy. It is desirable that the support piece 13C has a connecting portion 13A in the middle of the WD in the width direction, and the tip portion is a knob portion having no connecting portion 13A. The shape of the support piece 13C can be appropriately determined, and in the illustrated example, the LD length in the front-rear direction becomes shorter toward the tip, and the connecting portion 13A is provided at the portion where the length of the LD in the front-rear direction becomes shorter. However, it can also be rectangular. When the support piece 13C has a rectangular shape, it is preferable that the LD length in the front-rear direction is shorter than that of the sheet 13S constituting the side expansion / contraction region 13E. As the material of the support piece 13C, known materials such as non-woven fabric, plastic film, polylace non-woven fabric, paper and composite materials thereof can be used without particular limitation, but the fineness is 1.0 to 3.5 dtex and the grain size is 20 to 100 g / m. ^2. A spunbonded non-woven fabric, an air-through non-woven fabric, or a spunlaced non-woven fabric having a thickness of 1 mm or less is preferable.

The shape of the telescopic type fastener assembly 13 can be appropriately determined, and it is preferable that the side telescopic region 13E is rectangular as shown in the illustrated example because it is easy to manufacture. It can also be a trapezoid that shortens the length of the LD. The dimensions of the telescopic type fastener assembly 13 can be appropriately determined, but the length of the LD in the front-rear direction of the side telescopic region 13E is preferably about 30 to 100 mm, and the length of the WD in the width direction of the side telescopic region 13E is It is preferably about 20 to 90 mm.

(Front target seat)
A front target sheet 20 for facilitating the connection is provided at the connection portion of the connection portion 13A in the ventral portion F. When the connecting portion 13A is a hook material, the front target sheet 20 includes a base layer made of a plastic film or a non-woven fabric and an engaging layer provided on the entire outer surface of the connecting portion 13A to which the hook of the connecting portion 13A is detachably engaged. Those having can be preferably used. In this case, as the engaging layer, in addition to the form in which a loop is formed on the base layer by the thread sewn into the base layer, a non-woven fabric layer of a thermoplastic resin is attached on the base layer by an intermittent ultrasonic seal. It is known that the fibers of the non-woven fabric form a loop, but any of them can be preferably used. Further, it is also possible to use a front target sheet 20 of a type in which a non-woven fabric of a thermoplastic resin is embossed and has no base layer. In these front target seats 20, the hook of the connecting portion 13A is entangled or caught in the loop, so that the connecting portion 13A is connected to the front target seat 20. When the connecting portion 13A is an adhesive layer, a front target sheet 20 in which the surface of a plastic film having a smooth and highly adhesive surface is peeled can be preferably used.

Decorative printing 20a visible from the outer surface can be applied to at least one of the front and back surfaces of the front target sheet 20. Similar to the decorative printing of the liquid-impermeable sheet 11, the decorative printing 20a of the front target sheet 20 is not particularly limited in the type, shape, and dimensions of the decorative printing 20a, and can be either continuous decorative printing or intermittent decorative printing. Either one or both can be adopted.

Characteristically, as in the example shown in FIG. 2 and the example shown in FIG. 8, the front target sheet 20 is continuous over the left and right sides of the ventral portion F, and the trailing edge 20b of the front target sheet 20 is on the front side. It has at least one recessed recess 21, and has a decorative print 11b in a region of the liquid-impermeable sheet 11 surrounded by the recess 21 of the front target sheet 20. Therefore, the decorative area of the liquid-impermeable sheet 11 is expanded by the area of the recess 21 provided in the front target sheet 20 without dividing the front target sheet 20 into a plurality of parts as in the conventional case. Therefore, the ease of manufacture is not impaired.

The width of the front target sheet 20 is not particularly limited, but usually, it is preferably about 60 to 125% of the total width of the main body 10.

The number of the recesses 21 is not particularly limited, and may be one as in the example shown in FIG. 2, and a plurality of recesses 21 may be provided at intervals in the width direction WD as in the example shown in FIG. The shape of the recess 21 is not particularly limited, but it should be a curved shape with a gradual change such as a sinusoidal shape as shown in the illustrated example, rather than a triangular shape or an angular shape such as a trapezoid or a rectangle. Is preferable.

The area of the recess 21 is not particularly limited, but when the total area (the area of one recess 21 when there is one recess 21) is ^{about 14 to 28 cm 2} , the decorative area of the liquid impermeable sheet 11 This is preferable because the enlargement effect is high.

The depth of the recess 21 can be appropriately determined, and can be, for example, about 8 to 12% of the total length of the main body 10 of 10 L. As in the example shown in FIG. 2, when the front edge of the recess 21 is located in front of the rearmost portion of the front edge 20f of the front target sheet 20, the front target sheet 20 is straight along the width direction WD. The continuously continuous portion disappears, the flexibility of the ventral portion F is improved, and the effect of expanding the decorative area of the liquid-impermeable sheet 11 is also high. On the other hand, as in the example shown in FIG. 8, when the front edge of the recess 21 is located after the rearmost portion of the front edge 20f of the front target sheet 20, the front target sheet 20 is located along the width direction WD. It will have a linearly continuous portion. If the recess 21 is too deep and the front target sheet 20 does not have a portion linearly continuous with the width direction WD, the connecting portion 13A should be positioned on the front target sheet 20 in the width direction WD range having the recess 21. However, if the front target sheet 20 has a portion linearly continuous with the width direction WD, even if it is in the width direction WD range having the recess 21. The connecting portion 13A can be reliably positioned on the front target seat 20, and more reliable connecting is possible.

The front edge 20f of the front target sheet 20 may be linear along the width direction WD, but as shown in the illustrated example, the convex portion 22 projecting to the front side (the edge side of the waist) at a position corresponding to the concave portion 21. When the front target sheet 20 is provided, the change in the LD dimension in the front-rear direction is reduced over the entire width direction WD of the front target sheet 20, the front target sheet 20 can be easily attached at the time of manufacturing, and the waist is more than the connecting position of the connecting portion 13A. This is preferable because the side portion is less likely to bend with respect to the crotch side portion than the connecting position.

As shown in FIG. 2, one preferred front target sheet 20 is provided with one recess 21 at the trailing edge of the center region 20C located at the center of the WD in the width direction, and the recess 21 at the front edge of the center region 20C. A convex portion 22 protruding to the front side is provided at a position corresponding to the above, and the side regions 20S located on the left and right sides of the center region 20C extend in the width direction WD with a predetermined front-rear direction LD dimension, and the side region 20S The front edge of the diaper is separated from the front end of the diaper to the rear side. As described above, by providing the recess 21 in the center area 20C which is rarely used for connection in the front target sheet 20 and not providing the recess 21 in the side area 20S, the side area 20S normally used in the front target sheet 20 is conventionally used. The decorative area of the liquid-impermeable sheet 11 can be expanded by the center region 20C while enabling the same connection. Further, by having the convex portion 22 protruding to the front side at a position corresponding to the concave portion 21 in the center region 20C, the change in the LD dimension in the front-rear direction is reduced over the entire width direction WD of the front target sheet 20, and the front target at the time of manufacturing. The seat 20 can be easily attached, and the waist side portion from the connecting position of the connecting portion 13A is less likely to bend.

However, if the convex portion 22 is simply provided, the area having the front target sheet 20 becomes wide, so that the flexibility and air permeability of the ventral portion F may decrease. Therefore, as shown in the illustrated example, the convex portion 22 of the front target sheet 20 has a first portion 22a that coincides with the front end of the diaper, and the second portion 22b other than the portion of the front target sheet 20 that coincides with the front end of the diaper. The back target sheet 25 is placed at a position in the width direction WD corresponding to the first part of the front target sheet 20 at the waist circumference portion of the back side portion B, which is a portion separated from the front edge of the diaper to the rear side. The entire trailing edge 25b of the back target sheet 25 coincides with the trailing edge of the diaper, and the front edge of the ventral portion F and the trailing edge of the dorsal portion B are butted against each other. The front edge of the ventral portion F and the trailing edge of the dorsal portion B coincide with each other, and the shapes of the front edges 20f and 25f of the entire area including the front target sheet 20 and the back target sheet 25 are the front target sheet 20. A form that matches the shape of the trailing edge 20b is proposed.

The tape-type disposable diaper can be manufactured by cutting a continuum in which individual diaper portions repeat in the MD direction at the boundary between the individual diaper portions at intervals in the MD direction. In this case, since the front edge of the ventral portion F and the trailing edge of the dorsal portion B are formed by cutting, the front edge of the ventral portion F and the trailing edge of the dorsal portion B are in a state where they are butted against each other. It will match. Here, according to the example shown in FIGS. 1 and 8, as shown in FIG. 12, the undivided target sheet 29 having a shape in which the front target sheet 20 and the back target sheet 25 are combined at the time of manufacturing is MD. After arranging so as to straddle the ventral part F of one diaper DP portion adjacent to the direction and the dorsal portion B of the other diaper DP portion, cut at the boundary of each diaper partial DP. Therefore, a method of dividing the undivided target sheet 29 into the front target sheet 20 and the back target sheet 25 can be adopted. Therefore, since the undivided target sheet 29 has a large front-rear LD dimension at the time of attachment, it is excellent in ease of attachment, and the front-rear LD dimension is reduced in the product, so that the flexibility and air permeability of the ventral portion F are reduced. It can be suppressed.

Further, in the examples shown in FIGS. 1 and 8, the shapes of the front edges 20f and 25f of the entire region including the front target sheet 20 and the back target sheet 25 match the shapes of the rear edges 20b of the front target sheet 20. Therefore, as shown in FIG. 11, a continuum in which the portion of the undivided target sheet 29 having the shape of the front target sheet 20 and the back target sheet 25 combined repeats in the MD direction is individually spaced in the MD direction. By cutting only at the boundary of the portion to be the undivided target sheet 29, there is also an advantage that the undivided target sheet 29 can be manufactured without generating trim (waste material).

The back target sheet 25 can be used to fix the back target sheet 25 in a rolled state at the time of disposal before or after use. That is, for example, as shown in FIG. 10, after folding in half at the center C in the front-rear direction, further folding in half at the center in the front-rear direction, rolling from one side portion toward the other side portion, and the other side portion. By connecting the connecting portion 13A of the above to the back target sheet 25, the diaper can be fixed in a compact state. Further, when fixing in a rolled state before use, when the connecting portion 13A is connected to the exterior sheet 12 made of non-woven fabric and the connecting portion 13A is peeled off for unfolding at the time of use, the connecting position of the connecting portion 13A in the exterior sheet 12 However, such fluffing can be prevented by connecting the connecting portion 13A to the back target sheet 25. In particular, as in the example shown in FIGS. 1 to 7, in the form in which the waist elastic sheet 90 is provided around the waist of the dorsal portion B, shrinkage wrinkles are formed on the outer surface of the dorsal portion B. When rolled as shown, the connecting portion 13A tends to be insufficiently fixed, but by having the back target sheet 25, the connecting portion 13A can be firmly fixed when rolled as shown in FIG.

At least one of the front and back surfaces of the back target sheet 25 can be subjected to decorative printing 25c that can be visually recognized from the outer surface. Similar to the decorative printing of the liquid-impermeable sheet 11, the decorative printing 25c of the back target sheet 25 is not particularly limited in the type, shape, and dimensions of the decorative printing 20a, and can be either continuous decorative printing or intermittent decorative printing. Either one or both can be adopted.

On the other hand, when the wing portion WP is provided on the ventral side portion F, the wing portion WP is provided by extending the sheet of the main body 10 laterally around the waist of the ventral portion F as in the examples shown in FIGS. In addition to the method, the sheet of the main body 10 should not be extended, and the shape of the main body 10 should be kept substantially rectangular, and a separate sheet for forming the wing portion WP should be attached to the side of the waist circumference of the main body 10. Can be done. In the former case, it is necessary to cut the sheet of the main body 10 along the circumference of the legs. The latter has advantages such as omitting material cutting and adopting a dedicated material suitable for the wing portion WP, but an increase in cost due to the addition of the material cannot be avoided. Therefore, as shown in FIGS. 8 and 9, the intermediate portion CP is formed by the main body 10, and the front target sheet 20 is extended to both the left and right sides to protrude from the side edges of the main body 10, and the front target sheet 20 protrudes. It is also proposed to form a wing portion WP of the ventral portion F by the portion. In this case, since the wing portion WP is formed only by the front target sheet 20, it is not necessary to cut the side portion of the main body 10 and it is not necessary to use a material dedicated to the wing portion WP.

The width of the wing portion WP (the width of the portion of the front target sheet 20 protruding toward the main body in the example shown in FIG. 8) can be appropriately determined, and is, for example, about 13 to 20% of the width of the intermediate portion CP. Can be done.

The combination of the front target sheet 20 in which a thread is sewn on a resin film and the connecting portion 13A made of a hook material of a mechanical fastener is currently widely used, and such a front target sheet 20 is placed on the side of the main body 10. When the wing portion WP is formed around the waist of the ventral portion F by projecting from the edge, the resin film comes into contact with the skin, so that the portion of the front target sheet 20 projecting from at least the side edge of the main body 10. It is desirable that the back surface of the non-woven fabric 24 is made of non-woven fabric 24.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
-"Unfolded state" means a state in which the natural length is completely flattened and unfolded without contraction or slack.
-The "MD direction" and "CD direction" mean the flow direction (MD direction) in the manufacturing equipment and the lateral direction (CD direction) orthogonal to the flow direction, and in the tape type disposable diaper, the MD direction is the front-back direction of the product. The CD direction is the width direction of the product.
-"Elongation rate" means a value when the natural length is 100%.
-"Gel strength" is measured as follows. To 49.0 g of artificial urine, 1.0 g of a highly absorbent polymer is added and stirred 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).
-"Artificial urine" includes 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. It is a mixture of .09 wt% and is used at a temperature of 37 ° C. unless otherwise specified.
・ "Metsuke" is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device under standard conditions (test location: temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to bring it to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. A sample having a size of 100 mm × 100 mm is cut out from the test piece in a constant weight state using a sampling template (100 mm × 100 mm). The weight of the sample was measured, 10 0 times to calculate the weight per square meter, a basis weight.
-"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 about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.
-Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

The present invention can be used for tape-type disposable diapers as in the above example.

B ... dorsal part, C ... center in the front-back direction, CP ... middle part, EF ... end flap part, F ... ventral part, LD ... front-back direction, SF ... side flap part, WD ... width direction, WP ... wing part, 10 ... Main body, 11 ... Liquid permeable sheet, 12 ... Exterior sheet, 13 ... Fastener assembly, 13A ... Connecting part, 13B ... Fastener fixing part, 13C ... Support piece, 13E ... Side expansion and contraction area, 20 ... Front target sheet, 20C ... center area, 20S ... side area, 21 ... concave, 22 ... convex, 22a ... first part, 22b ... second part, 25 ... back target sheet, 29 ... undivided target sheet, 30 ... top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rise gather, 62 ... Gather sheet, 63 ... Gather elastic member, 70 ... Side elastic member, 90 ... Waist elastic sheet, 95 ... Intermediate Stretchable area, 96 ... Non-stretchable area.

Claims (5)

It has a ventral portion extending anteriorly from the center in the anterior-posterior direction and a dorsal portion extending posteriorly from the center in the anterior-posterior direction.
It has an absorber provided from the ventral side portion to the dorsal side portion, a liquid-permeable top sheet that covers the front side of the absorber, and a liquid-impermeable sheet that covers the back side of the absorber.
The front target seat provided on the outer surface of the waist circumference of the ventral portion and
It has connecting portions provided on the left and right sides of the waist circumference portion of the dorsal portion and which are detachably connected to the front target seat.
For tape-type disposable diapers
The front target sheet is continuous over the left and right sides of the ventral portion.
The trailing edge of the front target sheet has at least one recessed portion on the front side.
The liquid is surrounded by the recess of the front target sheet in impermeable sheet area, it has a decorative print,
The front target sheet has a center region located at the center in the width direction and side regions located on the left and right sides of the center region.
The concave portion is provided at one position on the trailing edge of the center region, and a convex portion protruding forward is provided at a position corresponding to the concave portion on the front edge of the center region.
The side area extends in the width direction with a predetermined anteroposterior dimension, and the front edge of the side area is separated from the front end of the diaper to the rear side.
A tape-type disposable diaper that features this. A part of the front target sheet in the front-rear direction is linearly continuous in the width direction.
The tape-type disposable diaper according to claim 1. It has a ventral portion extending anteriorly from the anterior-posterior center and a dorsal portion extending posteriorly from the anterior-posterior center.
It has an absorber provided from the ventral side portion to the dorsal side portion, a liquid-permeable top sheet that covers the front side of the absorber, and a liquid-impermeable sheet that covers the back side of the absorber.
The front target seat provided on the outer surface of the waist circumference of the ventral portion and
It has connecting portions provided on the left and right sides of the waist circumference portion of the dorsal portion and which are detachably connected to the front target seat.
For tape-type disposable diapers
The front target sheet is continuous over the left and right sides of the ventral portion.
The trailing edge of the front target sheet has at least one recessed portion on the front side.
A decorative print is provided in the area of the liquid-impermeable sheet surrounded by the recesses of the front target sheet.
The front edge of the front target sheet has a convex portion at a position in the width direction corresponding to the concave portion.
The convex portion of the front target sheet has a first portion that coincides with the front end of the diaper, and the second portion of the front target sheet other than the portion that coincides with the front end of the diaper is separated from the front edge of the diaper to the rear side. It is a part to do
The waist circumference portion of the dorsal side portion has a back target sheet at a position in the width direction corresponding to the first portion of the front target sheet.
The entire trailing edge of the back target sheet coincides with the trailing edge of the diaper.
With the front edge of the ventral portion and the posterior edge of the dorsal portion abutted, the front edge of the ventral portion and the posterior edge of the dorsal portion coincide with each other.
The shape of the front edge of the entire area including the front target sheet and the back target sheet matches the shape of the rear edge of the front target sheet.
A tape-type disposable diaper that features this. At least the waist circumference of the ventral portion has a wing portion extending to both the left and right sides and an intermediate portion located between the left and right wing portions.
The intermediate portion is formed of a main body having the top sheet, a liquid-impermeable sheet, and an absorber.
The wing portion of the ventral portion is a portion where the front target sheet protrudes from the side edge of the main body.
The tape-type disposable diaper according to any one of claims 1 to 3. The front target sheet has a resin film and a thread sewn on the resin film.
The connecting portion is a hook material for a mechanical fastener.
At least the back surface of the front target sheet protruding from the side edge of the main body is made of a non-woven fabric.
The tape-type disposable diaper according to claim 4.

Images