JP6990074B2 - 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, 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 typical 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, at least the dorsal part. The ventral and dorsal parts have an intermediate part located between the left and right wing parts, and the wing part is the outer surface of the ventral part. It has a connecting portion that is detachably connected to the. At the time of use, the wing portion is turned from both sides of the waist to the outer surface of the ventral portion, and the connecting portion of the wing portion is connected to the outer surface of the ventral portion. Such tape-type disposable diapers are widely used for nursing care (adult use) as well as for infants.

Conventionally, as a tape-type disposable diaper, the side flap portion extending laterally from the side edge of the absorber is excised along the leg circumference, and the unexcised portion is left as a wing portion (for example, patented). In addition to (see Document 1), a separate type (see, for example, Patent Documents 2 and 3) in which a separately manufactured connecting tape is attached to the side edge of the main body forming the intermediate portion and the connecting tape serves as a wing portion is known. ing. Further, as a separate body type, a body in which a unit including the left and right wing portions is attached to a main body forming an intermediate portion is also proposed (see, for example, Patent Document 4).

On the other hand, since the wing portion is a portion corresponding to a curved surface of the body surface (usually a curved surface of a portion along the iliac crest), it is desirable to have excellent fit to this curved surface.

However, since the conventional wing portion 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 apex of the curved surface becomes high, and the fit is achieved in this respect. There is room for improvement in sex.

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

Therefore, a main object of the present invention is to improve the fit of the wing portion to the body surface.

Various aspects that solve 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.
Side flaps having no absorber are provided on both sides in the width direction from the ventral portion to the dorsal portion.
At least the dorsal portion has wing portions extending on both left and right sides in the width direction from the crotch portion.
It has a connecting tape having a mounting portion fixed to the wing portion, a tape free portion extending laterally from the mounting portion, and a connecting portion to the ventral portion provided in the tape free portion.
In the mounted state, in a tape-type disposable diaper in which the connecting tape of the wing portion is connected to the outer surface of the ventral side portion.
The side flap portion has a pair of folded portions that are folded back to the center side in the width direction and inside the diaper and fixed to the facing surface on the front side of the connecting tape and the rear side of the connecting tape.
The portion located between the pair of folded portions in the side flap portion and continuous with the pair of folded portions is not fixed in a state of being folded toward the center in the width direction and can be expanded laterally. It is a widening part,
The boundary between the folded portion and the widening portion is located at a position separated from the connecting tape to the front side and a position separated from the connecting tape to the rear side.
The mounting portion of the connecting tape is located at the widening portion.
In the unfolded state, the widened portion becomes the wing portion, and the wing portion has a width changing portion in which the unfolded width of the widened portion increases as it approaches the connecting tape side.
A tape-type disposable diaper that features this.

(Action effect)
In this embodiment, by providing folded portions on both front and rear sides of the connecting tape and providing widening portions between these folded portions, the inner surface of the wing portion is gently recessed when the connecting tape is pulled laterally to expand. It deforms so that it fits well on the curved surface of the body surface (particularly the curved surface along the iliac crest), and the contact pressure with respect to the apex of the curved surface is unlikely to increase.
Further, since the wing portion is formed by providing the folded portion and the widening portion in the side flap portion, it is not necessary to perform excision in order to form the wing portion even though it is an integrated type. Moreover, the wing portion has a width changing portion in which the unfolding width of the widening portion increases toward the waist side on the leg circumference side. Since the side edge of this width change portion faces diagonally upward toward the side, the side edge of the wing portion on the leg circumference side follows the leg circumference, and the fit to the leg circumference is improved, and the buttocks Can be covered in a wider area.

<Second aspect>
The rear end portion of the folded portion on the rear side of the connecting tape is fixed to the facing surface over the entire width direction.
The tape type disposable diaper of the first aspect.

(Action effect)
In this embodiment, since the rear end of the folded-back portion that continues from the recessed portion on the inner surface of the wing portion is blocked, the excrement leaked from the recessed portion of the wing portion is captured and leaked to the outside of the disposable diaper. You can prevent it from coming out.

<Third aspect>
The folded portion on the front side of the connecting tape is provided up to the front end of the ventral side portion, the front end portion of the folded portion is fixed to the facing surface over the entire width direction, and the folded portion is from the front end portion of the folded portion. In the rear part, only the end on the center side in the width direction is fixed to the facing surface continuously or intermittently in the front-rear direction.
The tape-type disposable diaper of the first or second aspect.

(Action effect)
If the entire folded portion is fixed to the facing surface in order to provide the folded portion on the side flap portion, the flexibility of the side flap portion may be impaired. On the other hand, if only the end portion on the center side in the width direction of the folded portion is fixed to the facing surface, the front end portion may be opened and the appearance may be deteriorated. Therefore, it is preferable that it is configured as in this embodiment.

<Fourth aspect>
A liquid impermeable sheet that covers the back side of the absorber and
An exterior sheet that covers the back side of the liquid impermeable sheet and
A root portion fixed to the area including the side flap portion, a protruding portion extending from the root portion, an inverted portion in which both ends of the protruding portion in the anteroposterior direction are fixed in an inverted state, and a front and rear of the projecting portions. A gathered sheet having a non-fixed raised portion located between the lodging portions, and a raised gather having a gather elastic member fixed to at least the tip portion of the raised portion.
Equipped with
The gather sheet, the liquid impermeable sheet, and the exterior sheet are laminated on the side flap portion.
The folded-back portion and the widened portion include the side portion of the exterior sheet and do not include the liquid-impermeable sheet, and the side edge of the liquid-impermeable sheet is on the center side in the width direction from the folded-back position of the folded-back portion. positioned,
The tape type disposable diaper of the third aspect.

(Action effect)
When the structure of the side flap portion is configured as in this embodiment, the number of laminated sheets in the side flap portion is increased by not including the liquid-impermeable sheet in the folded portion and the widening portion, that is, the air permeability and flexibility. Can be suppressed.

<Fifth aspect>
The folded-back portion and the widened portion do not include the gathered sheet, and the side edges of the gathered sheet are located on the center side in the width direction from the folded-back position of the folded-back portion.
The tape type disposable diaper of the fourth aspect.

(Action effect)
As in this embodiment, by not including the liquid permeable sheet as well as the gather sheet in the folded portion and the widening portion, it is possible to further suppress the deterioration of the air permeability and flexibility of the side flap portion.

<Sixth aspect>
The gather sheet extends only to the end on the widthwise center side of the folded portion.
The tape type disposable diaper of the fifth aspect.

(Action effect)
By narrowing the width of the gather sheet as in this embodiment, the flexibility of the side flap portion can be further improved.

<Seventh aspect>
The connecting tape has a mounting portion fixed to the wing portion, a tape free portion extending laterally from the mounting portion, and a connecting portion to the ventral side portion provided in the tape free portion. ,
A waist elastic sheet that expands and contracts in the width direction is provided over the portion that overlaps the attachment portion of both connecting tapes.
The tape type disposable diaper of the sixth aspect.

(Action effect)
As described above, when the width of the gather sheet is narrowed, the fixing portion of the connecting tape is likely to be located in the portion consisting only of the exterior sheet. In this case, the strength of the fixed portion of the connecting tape may become a problem. This problem can be solved by using a high-strength material for the exterior sheet, but since many high-strength materials are inferior in flexibility, the original exterior sheet has a cloth-like appearance and a soft touch. Considering the purpose, it is not a preferable solution. On the other hand, if the waist elastic sheet is arranged so as to overlap with the attachment portions of both connecting tapes as in this embodiment, the strength of the portion to which the force is applied during use, especially the portion to which the attachment portion of the connecting tape is attached, is strong. Can be supplemented with a waist elastic sheet. Further, since the tightening force in the mounted state concentrated on the connecting tape and the tensile force at the time of mounting are directly transmitted to the waist elastic sheet, the elasticity of the waist elastic sheet is more preferably exhibited.

<Eighth aspect>
The connecting tape is fixed to the outer surface of the widened portion in the expanded state.
A tape-type disposable diaper according to any one of the fourth to seventh aspects.

(Action effect)
The connecting tape can be fixed to the inner surface in the expanded state in the widened portion, but since the touch may be deteriorated depending on the material of the connecting tape, the connecting tape may be attached to the outer surface in the expanded state in the widened portion as in this embodiment. It is also preferable to fix it on the surface.

As described above, according to the present invention, there are advantages such that the wing portion fits well to the curved surface of the body surface.

It is a top view which shows the inner surface of the tape type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the tape type disposable diaper in the unfolded state. 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 the waist elastic sheet, and (b) is a sectional view of the waist elastic sheet. (A) Plan view of connecting tape, (b) Cross-sectional view of connecting tape It is an enlarged view of the main part of FIG. 9-9 is a cross-sectional view taken along the line 9-9 of FIG. It is sectional drawing which shows the main part in the state which the connecting tape is opened. It is a front view which shows the wearing state. It is sectional drawing of the folded-back part which shows the other form. It is sectional drawing of the folded-back part which shows the other form. It is sectional drawing of the widening part which shows the other form. It is sectional drawing of the widening part which shows the other form. It is a top view which shows the inner surface of the tape type disposable diaper in the unfolded state. It is a top view which shows the change at the time of manufacturing. (A) Plan view of connecting tape, (b) Cross-sectional view of connecting tape It is a top view which shows the inner surface of the tape type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the tape type disposable diaper in the unfolded state.

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 an adhesive as a joining means for joining each component, and can be applied by a solid, bead, curtain, summit or spiral coating such as a hot melt adhesive, or by applying an elastic stretchable member. The fixed portion is formed by coating the outer peripheral surface of an elastic elastic member such as a comb gun or a sure wrap coating in place of or in combination with this. As the joining means for joining each component, instead of the hot melt adhesive, another adhesive may be used, or a welding means such as a heat seal or an ultrasonic seal may be used.

1 to 11 show an example of a tape-type disposable diaper 10. This tape-type disposable diaper 10 has a crotch portion including the center in the anterior-posterior direction, a ventral portion F extending anteriorly from the center in the anterior-posterior direction, and a dorsal portion B extending posteriorly from the center in the anterior-posterior direction. The absorber 56 is built in the range including the portion. 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 dorsal portion B extends to the left and right sides from the crotch portion. A wing portion WP is formed. The wing portion WP of the dorsal portion B has a connecting tape 13 detachably connected to the outer surface of the ventral side portion F, and in the mounted state, for example, as shown in FIG. 11, the wing portion WP of the wing portion WP. The connecting tape 13 is connected to the outer surface of the ventral portion F. As shown in FIGS. 19 and 20, a wing portion WP extending from the crotch portion to the left and right sides is also formed on the ventral portion F, and the side edges of the side flap portion SF are formed in the front-rear direction along the leg circumference. It is also possible to have a constricted shape in the middle of the LD. The crotch portion means a portion corresponding to the crotch of the wearer, and is usually a central portion when the unfolded tape type disposable diaper 10 is divided into three equal parts in the front-rear direction LD.

More specifically, the tape-type disposable diaper 10 of this example has a main body MP defined as a width direction range corresponding to the absorber 56, and side flap portions SF extending on both sides of the main body MP in the width direction. .. The main body MP has an absorber 56, a liquid-permeable top sheet 30 that covers the front side of the absorber 56, and a liquid-impermeable sheet 11 that covers the back side of the absorber 56. It has an end flap portion EF that does not have the absorber 56 and extends to the front side and the rear side of the absorber 56. The top sheet 30 and the liquid-impermeable sheet 11 extend to the left and right side flap portions SF and the front and rear end flap portions EF, and the exterior sheet 12 covering the back surface of the liquid-impermeable sheet 11 is a tape-type disposable diaper 10. It forms the entire back surface of the.

Further, rising gathers 60 that stand up on the skin side of the wearer are provided on both sides of the widthwise WD on the surface of the tape-type disposable diaper 10, and the gathering sheet 62 forming the rising gathers 60 is the top sheet 30. It extends from both sides to each side flap 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 10 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 the non-woven fabric is not particularly limited, and as the material fiber, for example, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, 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 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 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 13 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 10.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but is substantially, for example, interposing 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. For example, a non-woven fabric that ensures liquid impermeableness (in this case, the waterproof film and the non-woven fabric form a liquid-impermeable sheet) and the like can be exemplified. Of course, in addition to this, a material having liquid impermeableness and moisture permeability, which has been favorably used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. The sheet of this liquid-impermeable and moisture-permeable material is, for example, kneaded with an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretched in a uniaxial or biaxial direction. The microporous sheet obtained in the above can be exemplified. Furthermore, it is waterproof by a non-woven fabric using microdenier fibers, leakage-proof strengthening by reducing the voids of the fibers by applying heat or pressure, and coating with a highly water-absorbent resin or hydrophobic resin or a water-repellent agent. 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 has a rectangular shape, is slightly wider than the top sheet 30, and is narrower than the exterior sheet 12, but is not limited to this, and is not limited to the liquid-impermeable sheet. 11 can be appropriately changed, such as having the same width as the exterior sheet 12.

(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, 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 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 has a rising gather 60. Then, as long as it extends to the base portion of the rising gather 60, 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 56.

(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 the excrement to the absorber and enhances 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 preferably has a melting point similar to that of the top sheet 30. Further, considering the permeation of solid content in stool, 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.

Although the intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbing element 50, it may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the total length of the diaper 10, 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 absorption element 50 is a portion that absorbs and holds a liquid such as urine or loose stool, and in the illustrated example, it has an absorber 56 and a packaging sheet 58 that encloses the entire absorber 56. The packaging sheet 58 may be omitted if necessary, such as when the absorber 56 is excellent in shape retention, and in that case, the absorbent element 50 is composed of only the absorber 56. The absorbent element 50 can be adhered to the inner surface of the liquid impermeable sheet 11 on the back surface thereof via an adhesive such as a hot melt adhesive.

(Absorber)
The absorber 56 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. 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.

Further, 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 size of the absorber 56 extends to the vicinity of the peripheral edge of the tape type disposable diaper 10 in the front-back direction LD and the width direction WD. Reference numeral 56X indicates the entire width of the absorber 56, reference numeral 10X indicates the entire width of the tape type disposable diaper 10, and reference numeral 10L indicates the total length of the tape type disposable diaper 10 (equal to the total length of the diaper 10 in the illustrated form). There is.

(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, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, starch-acrylonitrile copolymer kendies, and cross-linking of sodium carboxymethyl cellulose. A substance, an acrylic acid (salt) polymer, or the like can be used. As the shape of the highly absorbent polymer particles, the commonly used powder or granular material is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less, are preferably used. If the water absorption rate is too slow, 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 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. 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 the material thereof may be polypropylene, polyethylene / polypropylene composite material, or the like. 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 particles are wound in a shape, the front and rear edges thereof are protruded from the front and back of the absorber 56, and the overlapped portion and the overlapped portion 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. 1 to 3, in order to improve the fit of the leg peripheral portion, a side elastic member 70 extending in the front-rear direction LD is provided between the sheet layers in the middle of the front-rear direction of the side flap portion SF. It is preferable that the portion having the side elastic member 70 expands and contracts in the front-rear direction LD due to the expansion and contraction of the side elastic member 70. The side elastic member 70 is provided, for example, between the gather sheet 62 and the liquid impermeable sheet 11 as shown in FIG. 8, or the folded-back portion 82 and the liquid impermeable sheet 11 described later as shown in FIG. If the folded-back portion 82 has a plurality of sheet layers, they may be provided between the sheet layers (in the illustrated example, between the gather sheet 62 and the exterior sheet 12). can do.

(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 10 stand up from the side of the top sheet 30 to the skin side ( (Protruding) rising gathers 60 are 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 stretched state in the front-rear direction to at least the tip portion of the raised portion 67, the non-fixed raised portion 68 located between the front and rear inverted portions of the protruding portion 66, and the raised portion 68. It has a member 63. The rising gather 60 is formed by 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. Can be used. As shown in FIGS. 1 to 3, 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 gather 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 67, but the portion between them is a non-fixed rising portion 68, and this rising portion 68 is the gather elastic member 63. It will stand up due to the contraction force. When the diaper 10 is attached, the diaper 10 is attached to the body in a boat shape, and the contraction force of the gather elastic member 63 acts on the body. Adhere to. As a result, so-called lateral leakage from around the legs is prevented.

(Waist elastic sheet)
It is preferable that the dorsal portion B is provided with a band-shaped waist telescopic sheet 90, and the dorsal portion B elastically expands and contracts in the width direction WD. As shown in FIG. 6, for example, the waist elastic 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 that expands and contracts in the width direction WD. It may be the area 95. 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 may be located. 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 nonwoven fabric can be used, but as shown in FIG. 6, two sheet layers 91 such as a nonwoven fabric are attached by 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 an elongated state 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.

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 30 to 100% of the width between the connecting portions 13A of the left and right connecting tapes 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 during mounting. The non-stretchable region 96 may be a region having no elastic member 92, but as described in Patent Document 3, the elastic member 92 is attached over the intermediate stretchable region 95 and the non-stretchable region 96, and the elastic member 92 is attached to the non-stretchable region 96. The elastic member 92 may remain in the non-stretchable region 96, but may have a structure in which the elastic member 92 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 may be 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 absorbent 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 on the outside of 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.

(Connecting tape)
The connecting tape 13 is provided on the wing portion WP, and as shown in FIG. 7, the mounting portion 13B attached to the wing portion WP, the tape free portion 13F extending laterally from the mounting portion 13B, and the tape free portion 13F thereof. It has a connecting portion 13A provided on the tape free portion 13F and which is detachably connected to the outer surface of the ventral side portion F.

As the connecting portion 13A of the connecting tape 13, a hook material (male material) of 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), etc., but any shape may be used. When wearing the diaper 10, the connecting tape 13 is rotated from both sides of the waist to the outer surface of the ventral portion F, and the connecting portion 13A of the connecting tape 13 is connected to an appropriate position on the outer surface of the ventral portion F.

As the connecting tape 13, not only the non-stretchable type (tab type) having no stretchable region as shown in FIG. 7, but also at least the portion between the mounting portion 13B and the connecting portion 13A as shown in FIG. It is also possible to adopt a stretchable type (side panel type) having a tape stretchable region 13E that stretches and contracts in the width direction WD.

The structure of the non-stretchable type connecting tape 13 is not particularly limited, and known ones can be adopted. The non-stretchable type connecting tape 13 of the illustrated example has a support piece 13C having a laterally projectable portion and a connecting portion 13A provided in the projectable portion of the support piece 13C. 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 elongation rate of the tape expansion / contraction region 13E in the expansion / contraction type connecting tape 13 is not particularly limited, but is preferably about 150 to 250%. The structure of the tape elastic region 13E is not particularly limited, and at least the tape elastic region 13E in the connecting tape 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. 18, 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 tape expansion / contraction region 13E of the connecting tape 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 10, but also the elastic members 13G. There is also an advantage that the shrinkage characteristics of the connecting tape 13 can be easily adjusted by making the thickness, the number of the diapers, the elongation rate, the spacing, and the type of the 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 member (thread-like or string-like) is used as the elastic member 13G, 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 tape expansion / contraction region 13E is provided over the entire widthwise WD of the connecting tape 13 (that is, including the mounting portion 13B and the connecting portion 13A) as long as it is provided at least in the portion between the mounting portion 13B and the connecting portion 13A. However, if the mounting portion 13B or the connecting portion 13A contracts, the connecting portion 13A may be insufficiently connected or the mounting portion 13B may have a poor connection. It is preferably provided in the range of 0 to 80% of the width direction range between the two. In this case, the mounting portion 13B and the connecting portion 13A may be a region having no elastic member 13G, but the elastic member 13G may be mounted over the entire width direction of the connecting tape 13, and the elastic member 13G may be attached to the mounting portion 13B and the connecting portion 13A. The elastic member 13G may remain in the mounting portion 13B and the connecting portion 13A by cutting or the like, but may have a structure in which the elastic member 13G hardly expands or contracts at all.

The connecting portion 13A of the stretchable type connecting tape 13 can be provided on the sheet layer 13S constituting the tape stretching region 13E, but as shown in the illustrated example, the connecting portion 13A protrudes from the tip of the tape stretching region 13E to the tip of the connecting tape 13. It is preferable to attach the support 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 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 length in the front-rear direction becomes shorter toward the tip, and the connecting portion 13A is provided in the portion where the length in the front-rear direction becomes shorter. It can also be rectangular. When the support piece 13C has a rectangular shape, it is preferable that the length in the front-rear direction is shorter than that of the sheet layer 13S constituting the tape expansion / contraction region 13E. As the material of the support piece 13C, the same material as that of the non-stretchable type can be used.

The shape of the stretchable type connecting tape 13 can be appropriately determined, and it is preferable that the tape stretchable 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 stretchable type connecting tape 13 can be appropriately determined, but the length of the tape stretchable region 13E in the front-rear direction LD is preferably about 20 to 100 mm, and the length of the tape stretchable region 13E in the width direction WD is preferably about 20 to 100 mm. It is preferably about 0 to 90 mm.

(Target sheet)
It is preferable to provide a target sheet 20 having a target for facilitating the connection at the connection portion of the connection tape 13 in 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 on the ventral side portion F is made of a non-woven fabric, for example, when the exterior sheet 12 of the illustrated embodiment is made of a non-woven fabric and the connecting portion 13A of the connecting tape 13 is made of a hook material, It is also possible to omit the target sheet 20 and entangle the hook material with the non-woven fabric of the exterior sheet 12 to connect them. In this case, the target sheet 20 may be provided between the exterior sheet 12 and the liquid impermeable sheet 11.

(Wide width part / width change part)
Characteristically, as shown in FIGS. 1, 8 and 9, the side flap portion SF of the tape type disposable diaper 10 is located on the front side of the connecting tape 13 and on the rear side of the connecting tape 13 and on the center side in the width direction. It has a folded-back portion 82 that is folded back inside the diaper and fixed to the facing surface by the fixed portion 82b, is located between the pair of folded-back portions 82 in the side flap portion SF, and is located in each of the pair of folded-back portions 82. The continuous portion is not fixed in a state of being folded back toward the center in the width direction, and is a widening portion 81 that can be expanded laterally. Further, the boundary between the folded-back portion 82 and the widening portion 81 is located at a position separated from the connecting tape 13 on the front side and at a position separated from the connecting tape 13 on the rear side. Further, the mounting portion 13B of the connecting tape 13 is located at the widening portion 81. As a result, in the unfolded state, the widened portion 81 becomes the wing portion WP, and the wing portion WP has a width changing portion 83 that increases as the unfolded width of the widened portion 81 approaches the connecting tape 13 side.

Since this tape-type disposable diaper has such a structure, as shown in FIG. 11, when the connecting tape 13 is pulled laterally to be unfolded, the inner surface of the wing portion WP is gently dented. It deforms like (dented part RP), fits well to the curved surface of the body surface (particularly the curved surface of the part along the iliac crest), and the contact pressure with respect to the apex of the curved surface is unlikely to increase. Further, since the wing portion WP is formed by providing the folded portion 82 and the widening portion 81 in the side flap portion SF, it is not necessary to perform excision in order to form the wing portion WP even though it is an integrated type. Moreover, the wing portion WP has a width changing portion 83 in which the unfolding width of the widening portion 81 increases toward the waist side toward the leg circumference side. Since the side edge of the width changing portion 83 is directed diagonally upward toward the side, the side edge of the wing portion WP on the leg circumference side is along the leg circumference, and the fit to the leg circumference is improved. , The buttocks can be covered over a wider area.

The width W1 of the folded portion 82 and the length in the front-rear direction of the widening portion 81 (the front-back spacing of the fixing portions 82b adjacent to both front and rear sides of the connecting tape 13) L1 are the position of the width changing portion 83 and the side edge of the widening portion 81. It is preferable to take this into consideration because it affects the inclination of. Normally, the width W1 of the folded-back portion 82 is preferably about 0.6 to 0.75 times the length L1 of the widened portion 81 in the front-rear direction. More specifically, in the case of infants, the width W1 of the folded-back portion 82 is preferably about 45 to 60 mm, and the length L1 of the widened portion 81 in the front-rear direction is preferably about 60 to 100 mm.

In the examples shown in FIGS. 1 and 2, the folded-back portion 82 is provided up to the front end of the ventral portion F, and as a result, the wing portion WP is not formed on the ventral portion F, but the dorsal portion B and the dorsal portion B. Similarly, the wing portion WP may be formed. That is, as shown in FIGS. 19 and 20, the widening portion 81 may be provided in the anteroposterior direction middle of the ventral portion F (for example, the anteroposterior direction range including the target tape).

The folded portion 82 may be entirely fixed to the facing surface as long as the end portion (fixed portion 82b) on the central side in the width direction is fixed at least, but the flexibility of the side flap portion SF may be impaired. On the other hand, as in the example of the fixing portion 82b shown in FIG. 1, only the end portion on the widthwise center side of the folded portion 82 may be fixed to the facing surface. However, when the rear end portion 82c of the folded portion 82 on the rear side of the connecting tape 13 is fixed to the facing surface over the entire width direction, the rear end of the folded portion 82 continuing from the recessed portion RP on the inner surface of the wing portion WP Since it will be blocked, the leaked excrement can be captured by the recessed portion RP of the wing portion WP and prevented from leaking to the outside of the disposable diaper. Further, when the folded-back portion 82 on the front side of the connecting tape 13 is provided up to the front end of the ventral side portion F, the front end portion of the folded-back portion 82 may be opened and the appearance may be deteriorated. Therefore, as in the fixed portion 82b of the example shown in FIG. 16, the front end portion 82f of the folded portion 82 is fixed to the facing surface over the entire width direction WD, and the portion of the folded portion 82 behind the front end portion 82f. It is preferable that only the end portion on the central side in the width direction is continuously or intermittently fixed to the facing surface in the front-rear direction LD.

The folded portion 82 can be formed by a part or all of the sheets constituting the side flap portion SF. However, the larger the number of laminated sheets of the folded portion 82 and the widened portion 81, the lower the air permeability and flexibility. Therefore, it is preferable that the smaller the number of laminated sheets of the folded portion 82 and the widened portion 81 is, and the folded portion 82 and the widened portion are widened. It is preferable that the material of the sheet of 81 is flexible. Specifically, in the case of the illustrated example, the exterior sheet 12 can be made of a flexible and highly breathable material such as an air-through non-woven fabric having a basis weight of about 15 to 30 g / m ² , and therefore, as shown in FIG. 8, the exterior sheet 12 has a weight of about 15 to 30 g / m 2. It is desirable that the width is wider than that of other materials, and the folded-back portion 82 and the widened portion 81 are formed by the side portions thereof. On the other hand, since the liquid impermeable sheet 11 is one of the hard materials, the width is narrowed so that the side edge thereof is located on the center side in the width direction from the folded position of the folded portion 82, and the folded portion 82 and the widened portion are widened. It is desirable that the 81 is configured so as not to contain the liquid impermeable sheet 11. Further, the gather sheet 62 is rich in flexibility and breathability as compared with the liquid impermeable sheet 11, but is inferior in flexibility and breathability as compared with the exterior sheet 12 because a certain degree of water impermeability is required. be. Therefore, like the liquid impermeable sheet 11, the gather sheet 62 is also narrowed so that its side edge is located on the center side in the width direction from the folded position of the folded portion 82, and the folded portion 82 and the widened portion 81 are gathered. It is desirable to configure it so as not to include the sheet 62. In this case, it is also preferable that the gather sheet 62 extends only to the end of the folded portion 82 on the center side in the width direction, as shown in FIG. 12, in order to further suppress the decrease in air permeability and flexibility.

Of course, as in the example shown in FIG. 13, not only the exterior sheet 12 but also the gather sheet 62 constituting the side flap portion SF is widened, and the exterior sheet 12 and the gather sheet 62 are bonded together to widen the folded portion 82 and the width. The portion 81 can also be formed. In this case, the strength of the widening portion 81 is high, but the air permeability and flexibility are low as compared with the case where the folded-back portion 82 and the widening portion 81 are formed without including the gather sheet 62.

The connecting tape 13 can be fixed to the inner surface of the widening portion 81 in the expanded state, but the touch may be deteriorated depending on the material of the connecting tape 13, so the width is widened as in the example shown in FIG. It is also preferable to fix the portion 81 to the outer surface in the unfolded state. When the exterior sheet 12 and the gather sheet 62 are bonded together to form the folded-back portion 82 and the widening portion 81 as in the example shown in FIG. 13, the exterior sheet 12 in the widening portion 81 is formed as in the example shown in FIG. It is also possible to sandwich and fix the end portion of the connecting tape 13 between the gather sheets 62 and the gather sheet 62.

As in the example shown in FIG. 13, when the exterior sheet 12 and the gather sheet 62 are bonded together to form the folded-back portion 82 and the widening portion 81, the strength of the widening portion 81 is high, so that the connecting tape 13 is attached to the widening portion 81. Suitable for fixing to. On the other hand, as in the example shown in FIG. 14, when the folded-back portion 82 and the widening portion 81 are formed only by the exterior sheet 12, the strength of the widening portion 81 is insufficient, so that the connecting tape 13 is stretched by the widening portion 81. If it is fixed to, the widening portion 81 may be plastically deformed or torn during use.

However, as shown in the illustrated example, if the waist elastic sheet 90 that expands and contracts in the width direction WD is provided over the portion of the dorsal portion B that overlaps with the attachment portions 13B of both connecting tapes 13, a portion to which a force is applied during use. In particular, the strength of the object to be fixed to the attachment portion 13B of the connecting tape 13 can be supplemented by the waist elastic sheet 90. Further, since the tightening force in the mounted state concentrated on the connecting tape 13 and the tensile force at the time of mounting are directly transmitted to the waist elastic sheet 90, the elasticity of the waist elastic sheet 90 is more preferably exhibited.

In manufacturing, as shown in the example shown in FIG. 17, after the sheets 12 and 62 constituting the side flap portion SF have been attached, the seats to be the folded-back portion 82 and the widening portion 81 (exterior sheet 12 in the illustrated example) are provided. Before folding back, the mounting portion 13B of the connecting tape 13 is mounted at the center of the WD in the width direction from the folding position fp. After that, the sheet to be the folded-back portion 82 and the widened portion 81 together with the connecting tape 13 is folded back to the center side in the width direction and inside the diaper as shown by the arrow in the figure, and only the portion to be the folded-back portion 82 is fixed to the facing surface with the fixing portion 82b. The portion to be the widening portion 81 is not fixed to the facing surface. As shown in the example shown in FIG. 10, the connecting portion 13A of the connecting tape 13 of the widening portion 81 can be temporarily attached to and detachably attached to the facing surface. Further, as in the example shown in FIG. 15, in the form in which the connecting tape 13 has the support piece 13C, the base end side of the support piece 13C is closer to the base end side than the connecting portion 13A in the support piece 13C prior to the folding of the sheet to be the folded portion 82 and the widening portion 81. At the position, the tip side can be folded back. In the product manufactured in this way, when the connecting tape 13 is used, the connecting tape 13 is simply opened laterally, and as shown in FIGS. 1 and 19, the widening portion 81 expands laterally and the folded portion 82 does not expand. The widening portion 81 becomes the wing portion WP, and the wing portion WP has a width changing portion 83 that increases as the unfolding width of the widening portion 81 approaches the connecting tape 13 side.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
-"Front-back direction LD (vertical direction)" means the direction connecting the ventral side (front side) and the back side (rear side), and "width direction WD" means the direction orthogonal to the front-back direction (left-right direction). However, the "thickness direction TD" means a direction orthogonal to the front surface and the back surface.
-"Front side" means the one closer to the skin when worn, and "back side" means the one farther from the skin when worn.
-The "deployed state" means a state in which the natural length is completely flattened and unfolded without shrinkage or slack.
-"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 in a standard state (test location: temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to bring it to a constant weight. Pre-drying refers to constant weight of a sample or test piece in an environment with a temperature of 100 ° C. For fibers with an official moisture content of 0.0%, pre-drying does not have to be performed. From the test piece in a constant weight state, a sample having a size of 100 mm × 100 mm is cut out using a sampling template (100 mm × 100 mm). The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is used as a basis weight.
-"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 equipment 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.

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

10 ... Tape type disposable diaper, 11 ... Liquid impermeable sheet, 12 ... Exterior sheet, 13 ... Connecting tape, 13A ... Connecting part, 13B ... Mounting part, 13C ... Support piece, 13E ... Tape elastic area, 13F ... Tape free Part, 20 ... Target sheet, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rising gather, 62 ... Gather sheet, 63 ... Gather elastic member, 70 ... Side elastic member, 81 ... widening part, 82 ... folded part, 90 ... waist elastic sheet, 95 ... intermediate elastic area, 96 ... non-expandable area, B ... back side part, MP ... main body part, EF ... end flap part, F ... ventral part, LD ... front-back direction, SF ... side flap part, TD ... thickness direction, WD ... width direction, WP ... wing part, C ... crotch part, 83 ... width change part.

Claims (8)

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.
Side flaps having no absorber are provided on both sides in the width direction from the ventral portion to the dorsal portion.
At least the dorsal portion has wing portions extending on both left and right sides in the width direction from the crotch portion.
It has a connecting tape having a mounting portion fixed to the wing portion, a tape free portion extending laterally from the mounting portion, and a connecting portion to the ventral portion provided in the tape free portion.
In the mounted state, in a tape-type disposable diaper in which the connecting tape of the wing portion is connected to the outer surface of the ventral side portion.
The side flap portion has a pair of folded portions that are folded back to the center side in the width direction and inside the diaper and fixed to the facing surface on the front side of the connecting tape and the rear side of the connecting tape.
The portion located between the pair of folded portions in the side flap portion and continuous with the pair of folded portions is not fixed in a state of being folded toward the center in the width direction and can be expanded laterally. It is a widening part,
The boundary between the folded portion and the widening portion is located at a position separated from the connecting tape to the front side and a position separated from the connecting tape to the rear side.
The mounting portion of the connecting tape is located at the widening portion.
In the unfolded state, the widened portion becomes the wing portion, and the wing portion has a width changing portion in which the unfolded width of the widened portion increases as it approaches the connecting tape side.
A tape-type disposable diaper that features this. The rear end portion of the folded portion on the rear side of the connecting tape is fixed to the facing surface over the entire width direction.
The tape-type disposable diaper according to claim 1. The folded portion on the front side of the connecting tape is provided up to the front end of the ventral side portion, the front end portion of the folded portion is fixed to the facing surface over the entire width direction, and the folded portion is from the front end portion of the folded portion. In the rear part, only the end on the center side in the width direction is fixed to the facing surface continuously or intermittently in the front-rear direction.
The tape-type disposable diaper according to claim 1 or 2. A liquid impermeable sheet that covers the back side of the absorber and
An exterior sheet that covers the back side of the liquid impermeable sheet and
A root portion fixed to the area including the side flap portion, a protruding portion extending from the root portion, an inverted portion in which both ends of the protruding portion in the anteroposterior direction are fixed in an inverted state, and a front and rear of the projecting portions. A gathered sheet having a non-fixed raised portion located between the lodging portions, and a raised gather having a gather elastic member fixed to at least the tip portion of the raised portion.
Equipped with
The gather sheet, the liquid impermeable sheet, and the exterior sheet are laminated on the side flap portion.
The folded-back portion and the widened portion include the side portion of the exterior sheet and do not include the liquid-impermeable sheet, and the side edge of the liquid-impermeable sheet is on the center side in the width direction from the folded-back position of the folded-back portion. positioned,
The tape-type disposable diaper according to claim 3. The folded-back portion and the widened portion do not include the gathered sheet, and the side edges of the gathered sheet are located on the center side in the width direction from the folded-back position of the folded-back portion.
The tape-type disposable diaper according to claim 4. A side elastic member extending in the front-rear direction is provided between the folded-back portion and the liquid-impermeable sheet, and the portion having the side elastic member expands and contracts in the front-rear direction due to expansion and contraction of the side elastic member. It has become
The gather sheet extends only between the widthwise central edge of the folded portion and the first side elastic member counting from the widthwise center side .
The tape-type disposable diaper according to claim 5. The connecting tape has a mounting portion fixed to the wing portion, a tape free portion extending laterally from the mounting portion, and a connecting portion to the ventral side portion provided in the tape free portion. ,
A waist elastic sheet that expands and contracts in the width direction is provided over the portion that overlaps the attachment portion of both connecting tapes.
The tape-type disposable diaper according to claim 6. The connecting tape is fixed to the outer surface of the widened portion in the expanded state.
The tape-type disposable diaper according to any one of claims 4 to 7.

Images