JP2020146157A5 - - Google Patents

Description

The present invention relates to an absorbent article provided with an entry part such as a name.

For absorbent articles, identification information such as names may be entered. For example, in kindergartens and nursery schools, in order to prevent the diaper before or after use from being mistaken for another child's diaper, the child's name or mark (hereinafter also referred to as "names") is given to the guardian. May be required to fill in in advance.

However, since the outer surface of disposable diapers is often a non-woven fabric of hydrophobic fibers, even if you write with an oil-based pen, the written part and the clothes you wear on it may rub against each other, making it impossible to distinguish the written contents. , There is a problem of entry retention that ink is transferred to clothes. In addition, there is also a problem of ease of entry that it is difficult to clearly enter names due to surface irregularities.

As a solution to these problems, the one described in Patent Document 1 has been proposed, but there is room for improvement in that the structure is complicated.

Japanese Unexamined Patent Publication No. 2013-176453

Therefore, the main object of the present invention is to improve the entry retention of names and the like by simpler means.

The absorbent articles that have solved the above problems are as follows.
<First aspect>
Equipped with post-treatment tape used to secure the absorbent article in a rolled state,
The post-treatment tape has a structure in which a strip is folded once or a plurality of times in the longitudinal direction to form a folded state in which a plurality of layers are laminated, and adjacent layers are bonded via an adhesive. And
At least one layer other than the uppermost layer is an entry layer having an entry portion on the upper surface thereof.
The layer superposed on the entry layer is a cover layer that covers the entire entry portion and has the adhesive on the lower surface.
The cover layer can be peeled off from the entry layer together with the adhesive on the lower surface without leaving the adhesive on the lower surface on the entry portion, and the cover layer is re-adhesive to the entry layer by the adhesive on the lower surface. It is possible and
At least a portion of the entry in the entry section is transparent through all layers located above the entry layer.
An absorbent article characterized by that.

(Action effect)
Absorbent articles such as disposable diapers and sanitary napkins are rolled or folded so that the surface is on the inside (hereinafter also referred to as "disposable state") when disposed of after use, and are highly airtight such as sanitary boxes and diaper storage containers. It is put in a storage container for temporary storage, and when the amount of storage in the container reaches a certain level, it is put in a diaper bag and discarded. For this reason, the absorbent article is generally provided with post-treatment means for fixing the absorbent article in a rolled state after use.

In particular, post-treatment tape is known as a post-treatment means often used for pants-type disposable diapers. This absorbent article skillfully utilizes the structure of the post-treatment tape to construct an entry part such as a name. That is, in the post-treatment tape of this absorbent article, the cover layer is peeled off from the writing layer once before use, the name etc. is written on the writing part with an oil-based pen, etc., then the cover layer is replaced and the writing layer is re-written. Can be made sticky. The entries in the entry section, in part or in whole, are transparent through all layers located above the entry layer. Therefore, since the entry part is covered with the cover layer and is not exposed, the entry part and the clothes worn on it are rubbed, and the entry contents cannot be discriminated or the ink is transferred to the clothes. No problem arises. Further, since the entry part is not hidden inside the rolled or folded absorbent article when it is in the disposal state, there is an advantage that the description in the entry part can be confirmed even in the disposal state. Furthermore, there is an advantage that the name and the like can be inevitably confirmed at the time of post-processing.

<Second aspect>
Each layer of the post-treatment tape is made of a resin sheet.
The entry portion is a rough surface portion provided on the upper surface of the entry layer.
The absorbent article of the first aspect.

(Action effect)
When the post-treatment tape is a resin sheet, it is preferable that the writing portion has a rough surface portion so that writing with oil-based ink or a pencil can be performed. In particular, in order to improve the peelability of the pressure-sensitive adhesive, it is desirable to apply the pressure-sensitive adhesive release agent to the writing portion, and in that case, the oil-based ink may be difficult to fix. However, if the entry portion is a rough surface portion, the oil-based ink enters the concave portion of the rough surface portion and is easily fixed.

<Third aspect>
The lowest layer of the layers of the post-treatment tape is the entry layer, and at least the lower surface of the entry portion is fixed to the absorbent article.
The absorbent article of the first or second aspect.

(Action effect)
In the post-treatment tape having a number of folds of Z or more, the writing layer may be provided in a layer other than the bottom layer, but if the writing layer is the bottom layer, the writing layer is fixed to the absorbent article, so that it is easy to write. It also has the advantage that the cover layer can be easily replaced.

<Fourth aspect>
The end of the cover layer on the side continuous with the layer overlapping the cover layer is not fixed to the entry layer or protrudes from the end of the entry layer.
The absorbent article of the third aspect.

(Action effect)
In general post-treatment tapes, the grip on the tip is not sticky and it is easy to pick, but in general post-treatment tapes with more than Z-fold folds, the layer that overlaps the bottom layer is , The whole is sticking to the bottom layer. In this case, if the bottom layer is used as the entry layer, the cover layer may be difficult to pick up, and it may be difficult to peel off only the cover layer when entering a name or the like. On the other hand, if the structure of this embodiment is provided, the peeling start end of the cover layer (the end on the side continuous with the layer overlapping on the cover layer) can be easily picked up, and only the cover layer is entered when writing a name or the like. It is preferable because it is easy to peel off.

According to the present invention, there is an advantage that the entry retention of a name or the like is improved by a simpler means.

It is a top view in the unfolded state which shows the inner surface of a pants type disposable diaper. It is a top view in the unfolded state of the diaper which shows the outer surface of a pants type disposable diaper. FIG. 3 is a sectional view taken along the line 3-3 of FIG. It is a cross-sectional view of 4-4 of FIG. It is a cross-sectional view of 5-5 of FIG. It is a top view in the unfolded state of a diaper showing only the main part of a pants type disposable diaper. It is sectional drawing which shows only the main part of the pants type disposable diaper. It is a perspective view of a pants type disposable diaper. It is a side view of the post-treatment tape. It is a side view of the post-treatment tape which shows the state which the cover layer was peeled off. It is a perspective view which shows the main part in the state which the cover layer was peeled off and the entry items were filled in. It is a side view of the post-treatment tape which shows the state which all the layers were peeled off. It is a perspective view which shows the post-treatment state of a pants type disposable diaper. It is a side view of the post-treatment tape. It is a side view of the post-treatment tape. It is a side view of the post-treatment tape. It is a side view of the post-treatment tape.

Hereinafter, as an example of the absorbent article, the pants-type disposable diaper 100 shown in FIGS. 1 to 8 will be described with reference to the attached drawings. The dotted pattern portion in the cross-sectional view shows a hot melt adhesive as a joining means for joining the constituent members located on the front side and the back side thereof. The hot melt adhesive can be applied by a known method such as slot coating, continuous linear or dotted bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). Can be applied. Instead of or in conjunction with this, at the fixed portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by welding a material such as a heat seal or an ultrasonic seal can also be used.

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

The pants-type disposable diaper 100 shown in FIGS. 1 to 8 is composed of at least an exterior body 12 constituting a waist circumference area and an interior body 200 attached to the exterior body 12 from the front body F to the back body B. It is something that is. The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior body 12 is a portion that supports the interior body 200 with respect to the wearer's body. The reference numeral Y indicates the total length of the diaper in the unfolded state (the vertical length from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the rear body B), and the reference numeral X indicates the total width of the diaper in the unfolded state. Is shown.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated example. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 on the body side, a liquid impermeable sheet 11, and an absorbing element 50 interposed between them. Reference numeral 40 indicates an intermediate sheet provided between the top sheet 30 and the absorption element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorption element 50, and reference numeral 60 indicates an interior body. In order to prevent excrement from leaking to both sides of the 200, the rising gathers 60 provided on both sides of the interior body 200 and standing up on the body side are shown.

(Top sheet)
The top sheet 30 has a property of allowing liquid to permeate, and examples thereof include a perforated or non-perforated non-woven fabric and a porous plastic sheet. When the rising gather 60 is provided, both sides of the top sheet 30 pass between the liquid impermeable sheet 11 and the rising gather 60 and wrap around to the back side of the absorbing element 50 to prevent the liquid from penetrating. It is preferable to adhere to the impermeable sheet 11 and the rising gather 60 with a hot melt adhesive or the like.

(Intermediate sheet)
An intermediate sheet (also referred to as a "second sheet") 40 can be provided in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorber 56. The intermediate sheet 40 not only rapidly transfers the liquid to the absorber 56 to improve the absorption performance by the absorber 56, but also prevents the phenomenon of "reversion" of the absorbed liquid from the absorber 56. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace non- woven fabric , spunbond non- woven fabric , SMS non- woven fabric , pulp non-woven fabric, mixed sheet of pulp and rayon, point-bonded non- woven fabric , or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. The basis weight is preferably 10 to 80 g / m ² , more preferably 15 to 65 g / m ² . The thickness of the raw material fiber of the non-woven fabric is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

Although the intermediate sheet 40 in the illustrated example is arranged in the center shorter than the width of the absorber 56, it may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the length of the absorber 56, or may be within a short length range centered on the region for receiving the liquid.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but is, for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric in which a plastic film is provided on the surface of the nonwoven fabric, or a plastic film. An example is a laminated sheet in which a non-woven fabric or the like is laminated and bonded to the above. For the liquid impermeable sheet 11, it is preferable to use a material having impermeable and moisture permeable properties, which has been favorably used in recent years from the viewpoint of preventing stuffiness. As a moisture-permeable plastic film, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet and then stretching it in a uniaxial or biaxial direction. Is widely used. In addition to this, non-woven fabrics using microdenier fibers, leakage-proof enhancement by reducing the voids of the fibers by applying heat or pressure, and coating of highly water-absorbent resin or hydrophobic resin or water-repellent agent. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11.

The liquid impermeable sheet 11 has a width that fits on the back side of the absorbing element 50 as shown in the drawing, and also has a width that fits on the back side of the absorbing element 50. It can also be extended to both sides of.

(Get up gather)
The rising gather 60 is a band-shaped member extending along both sides of the interior body 200 over the entire anteroposterior LD, blocking urine and loose stools traveling laterally along the top sheet 30 and preventing lateral leakage. It is provided to prevent it. The rising gather 60 of this example is provided so as to stand up from the side portion of the interior body 200, the portion on the base side stands up diagonally toward the center side of the WD in the width direction, and the portion on the tip side from the middle portion is wide. It stands diagonally toward the outside of the direction WD.

More specifically, the rising gather 60 folds the strip-shaped gather sheet 62 having a length equal to the length of the LD in the front-rear direction of the interior body 200 in the width direction WD and folds it in two, and also folds the folded portion and its vicinity thereof. A plurality of gather elastic members 63 are fixed between the sheets in an extended state along the longitudinal direction at intervals in the width direction WD. The base end portion (the end portion opposite to the seat folded portion in the width direction WD) located on the side opposite to the tip portion of the rising gather 60 is a mounting portion 65 fixed to the back surface of the side edge portion of the interior body 200. The portion other than the mounting portion 65 is a protruding portion 66 (a portion on the folded-back portion side) protruding from the mounting portion 65. Further, the protruding portion 66 is composed of a root side portion toward the center side of the width direction WD and a tip side portion folded outward from the tip end of the root side portion to the outside of the width direction WD. This structure is a surface contact type rising gather, but a line contact type rising gather (not shown) that does not fold back to the outside of the WD in the width direction can also be adopted. Then, in the protruding portion 66, both ends of the LD in the front-rear direction are in an inverted state, and a hot melt adhesive (instead of or together with this) is welded to the side surface of the top sheet 30 by a material such as a heat seal or an ultrasonic seal. The front-rear fixed portion 67 is fixed by a fixing means), while the middle portion of the front-rear direction LD located between them is a non-fixed free portion 68, and the front-rear and rear parts are connected to the free portion 68. The gather elastic member 63 along the direction LD is fixed in an extended state.

The gather sheet 62 is a flexible, uniform and concealing non-woven fabric such as spunbonded non-woven fabric (SS, SSS, etc.), SMS non-woven fabric (SMS, SMSMS, etc.), melt-blown non-woven fabric, etc., and water-repellent with silicone or the like, if necessary. The treated material can be preferably used, and the fiber texture is preferably about 10 to 30 g / m ² . As the gather elastic member 63, thread rubber or the like can be used. When spandex yarn rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixing is preferably 150 to 350%, more preferably 200 to 300%. Further, as shown in the drawing, the waterproof film 64 can be interposed between the gather sheets folded in two.

The number of gather elastic members 63 provided in the free portion 68 of the rising gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is preferably 3 to 10 mm. With this configuration, it becomes easier to hit the skin on the surface within the range in which the gather elastic member 63 is arranged. The gather elastic member 63 may be arranged not only on the tip side but also on the base side.

The object of fixing the mounting portion 65 of the rising gather 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, and the absorbing element 50 in the interior body 200.

In the rising gather 60 of the illustrated example, the contraction force of the gather elastic member 63 acts to bring both ends of the front-rear LD closer to each other, but both ends of the front-rear LD of the protruding portions 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed free portion between them, only the free portion stands up so as to abut on the body side as shown in FIG. In particular, when the mounting portion 65 is located on the back surface side of the interior body 200, the rising gather 60 stands up so as to open to the outside of the WD in the width direction in the crotch portion and its vicinity, so that the rising gather 60 faces around the legs. It comes into contact with, and the fit is improved.

(Absorption element)
The absorbing element 50 has an absorber 56 and a packaging sheet 58 that encloses the entire absorber 56. The packaging sheet 58 may be omitted.

(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 basis weight may be, for example, about 100 to 300 g / m ² in the case of stacking cotton-like pulp or staple fibers, and about 30 to 120 g / m ² in the case of filament aggregates. Can be done. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimping of the crimped fibers can be, for example, 5 to 75 pieces per 2.54 cm, preferably 10 to 50 pieces, and more preferably about 15 to 50 pieces. In addition, crimped fibers that have been uniformly crimped can be used. It is preferable to disperse and hold the highly absorbent polymer particles in the absorber 56.

The absorber 56 may have a rectangular shape, but as shown in FIG. 6, an hourglass having a front end portion, a rear end portion, and a constricted portion located between them and narrower than the front end portion and the rear end portion. The shape is preferable because the fit of the absorber 56 itself and the rising gather 60 around the legs is improved.

Further, although the dimensions of the absorber can be appropriately determined, it is preferable that the absorber extends to the peripheral portion of the interior body or its vicinity in the front-rear direction LD and the width direction WD. Reference numeral 56X indicates the width of the absorber 56.

(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, for example, by sieving (shaking for 5 minutes) using a standard sieve (JIS Z8801-1: 2006) of 500 μm. It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and the proportion of particles remaining on the sieve by sieving (shaking for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006). Is preferably 60% by weight or more.

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

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

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

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

If necessary, the highly absorbent polymer particles can be adjusted in spray density or spray amount in the plane direction of the absorber 56. For example, the liquid excretion site can be sprayed in a larger amount than other sites. When considering the difference between men and women, the spray density (amount) on the front side can be increased for men, and the spray density (amount) on the central part can be increased for women. Further, it is also possible to provide a portion where the polymer does not exist locally (for example, in the form of a spot) in the plane direction of the absorber 56.

(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 structure 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 to have a structure in which the particles are wound in a shape and the front and rear edges thereof protrude from the front and back of the absorber 56, and the protruding portions are crushed in the front and back directions and joined by a joining means such as a hot melt adhesive.

(Exterior body)
The exterior body 12 has a portion constituting the front body F extending from the center of the anteroposterior LD to the ventral side, and a portion constituting the rear body B extending from the center of the anteroposterior LD to the dorsal side. Both sides of the front body F and both sides of the back body B are joined to form the side seal portion 12A, and as shown in FIG. 8, the waist opening WO and the legs for passing the wearer's torso are provided. A pair of left and right leg openings LO for passing are formed.

The exterior body 12 has a waist circumference portion T determined as a vertical range having a side seal portion 12A (a vertical range from the waist opening WO to the upper end of the leg opening LO) and a front-rear direction LD of the portion forming the leg opening LO. It has an intermediate portion L determined by a range (between a vertical region having a side seal portion 12A of the front body F and a vertical region having a side seal portion 12A of the rear body B). The waist circumference T can be divided into a "waist edge" W that conceptually forms the edge of the waist opening and a "waist lower portion" U that is a lower portion thereof. Normally, when the waist circumference T has a boundary where the stretching stress in the width direction changes (for example, the thickness and the elongation rate of the elastic member change), the waist opening WO side is the waist rather than the boundary on the waist opening WO side. The edge portion W is formed, and if there is no such boundary, the waist opening WO side of the absorber 56 or the interior body 200 is the waist edge portion W. These vertical lengths vary depending on the size of the product and can be appropriately determined. For example, the waist edge W may be 15 to 40 mm and the lower waist U may be 65 to 120 mm. On the other hand, both side edges of the intermediate portion L are constricted along the circumference of the wearer's legs, and this is a portion for inserting the wearer's legs. As a result, the exterior body 12 has a substantially hourglass shape as a whole. The degree of constriction of the exterior body 12 can be appropriately determined, and as in the examples shown in FIGS. 1 to 8, the narrowest portion may be narrower than the width of the interior body 200 in order to obtain a neat appearance. Although it is preferable, even the narrowest portion may be set so as to be equal to or larger than the width of the interior body 200.

As shown in FIGS. 3 to 5, the exterior body 12 is formed by laminating two sheet materials 12S and 12H with an adhesive such as a hot melt adhesive, and is an inner sheet material located inside. The outer sheet material 12S extends only to the edge of the waist opening WO, but the outer sheet material 12S wraps around the waist side edge of the inner sheet material 12H and is folded inward, and the folded portion 12r is the interior body 200. It extends to cover up to the waist side end of the.

As the sheet materials 12S and 12H, any sheet-like material can be used without particular limitation, but a perforated or non-perforated non-woven fabric is preferable. When a non-woven fabric is used, the basis weight is preferably about 10 to 30 g / m ² .

The exterior body 12 is provided with elongated elastic members 15 to 19 such as thread rubber between the sheet materials 12S and 12H at a predetermined elongation rate in order to improve the fit to the waist circumference. As the elastic members 15 to 19, synthetic rubber or natural rubber may be used. Hot melt adhesion, heat sealing, or ultrasonic adhesion by various coating methods can be used for bonding the two sheet materials 12S and 12H of the exterior body 12 and fixing the elastic members 15 to 19 sandwiched between them. It is not preferable to firmly fix the entire surface of the exterior body 12 because the texture of the sheet is impaired. It is preferable to combine these to strengthen the adhesion of the elastic members 15 to 19 and to bond the other parts without or weakly.

More specifically, between the inner side surface of the inner sheet material 12H at the waist edge W of the rear body B and the front body F and the outer surface of the folded portion 12r of the outer sheet material 12S, it is continuous over the entire width direction WD. As such, the plurality of waist edge elastic members 17 are fixed at intervals in the anteroposterior direction LD and in a state of being extended along the width direction WD at a predetermined extension rate. Further, among the waist edge elastic members 17, one or a plurality of the elastic members 17 arranged in the region adjacent to the lower waist portion U may overlap with the interior body 200, or may overlap with the interior body 200 in the width direction. It may be provided on both sides of the WD in the width direction except for the central portion of the WD. The waist edge elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ² in the case of natural rubber, particularly 0.1 to 1). It is preferable to fix ³ to 22 rubber threads at intervals of 4 to 12 mm with an elongation rate of 150 to 400%, particularly 220 to 320%. Further, it is not necessary for all of the waist edge elastic members 17 to have the same thickness and elongation rate, and for example, the thickness and elongation rate of the elastic members may be different between the upper part and the lower part of the waist edge portion W.

Further, between the outer surface of the inner sheet material 12H and the inner side surface of the outer sheet material 12S in the lower waist portion U of the front body F and the rear body B, except for the central portion of the width direction WD overlapping with the interior body 200. A plurality of elastic members 15 and 19 at the lower part of the waist made of elastic members are spaced apart from each other in the front-rear direction LD so as to be continuous over the entire width direction WD at each portion on the upper side thereof and on both sides of the width direction WD. Moreover, it is fixed in a state of being stretched along the width direction WD at a predetermined stretch rate.

The elastic members 15 and 19 at the lower part of the waist have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ² in the case of natural rubber, especially 0.1 to 0.1 to It is preferable to fix the rubber thread of about 1.0 mm ² ) at an interval of 1 to 15 mm, particularly about 5 to 30 at intervals of 3 to 8 mm, with an elongation rate of 200 to 350%, particularly about 240 to 300%.

Further, between the outer surface of the inner sheet material 12H and the inner side surface of the outer sheet material 12S in the intermediate portion L of the front body F and the rear body B, except for the central portion of the width direction WD overlapping with the interior body 200, A plurality of intermediate elastic members 16 made of elastic members are provided at each portion on both sides of the widthwise WD so as to be continuous over the entire widthwise direction WD, at intervals in the front-rear direction LD, and at a predetermined elongation rate. It is fixed in a stretched state along the width direction WD.

The intermediate elastic members 16 and 18 have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ² in the case of natural rubber, particularly 0.1 to 1). It is preferable to fix the rubber threads of about 0.0 mm ² ) at intervals of 5 to 40 mm, particularly about 2 to 10 at intervals of 5 to 20 mm, with an elongation rate of 150 to 300%, particularly 180 to 260%, respectively.

As shown in the figure, the lower waist elastic members and the intermediate elastic members 15, 19, 16 and 18 are provided on both sides of the widthwise WD except for the central portion of the widthwise WD that overlaps the interior body 200. Then, the interior body 200 does not shrink more than necessary in the width direction WD, and the appearance is not bad or the absorbability is not deteriorated. In this structure, in addition to the structure in which elastic members exist only on both sides of the width direction WD, elastic members exist across the interior body 200 from one side to the other side of the width direction WD. In the central part of the width direction WD that overlaps with, the elastic member is finely cut, and the contraction force does not act (substantially equivalent to not providing the elastic member), but only both sides of the width direction WD act on the contraction force. The structure that becomes a part is also included. Of course, the arrangement of the lower waist elastic member and the intermediate elastic member 15, 19, 16 and 18 is not limited to the above example, and the lower waist portion U has an elastic force acting on the entire widthwise WD of the lower waist portion U. Part or all of the partial elastic member and the intermediate elastic member 15, 19, 16, 18 may be provided across the interior body 200 from one side to the other side of the widthwise WD.

(Exterior body split structure)
In the above example, the front body F to the back body B are continuously covered by the integrated exterior body 12, but the exterior body covers the ventral side of the wearer's waist and the back. It is divided into a back exterior body that covers the side, and the front end portion of the interior body is connected to the inner surface of the central portion of the width direction WD of the ventral exterior body by a hot melt adhesive or the like, and the width of the back exterior body. The rear end of the interior body is connected to the inner surface of the center of the direction WD by a hot melt adhesive or the like, and the ventral exterior body and the dorsal exterior body are not continuous on the crotch side and are separated from each other. Can also be adopted. This separation distance can be about 150 to 250 mm. In this case, the back surface of the liquid-impermeable sheet in the interior body covers the entire back surface of the interior body, or the entire crotch so as to cover the entire exposed portion between the ventral exterior body and the dorsal exterior body. It is also possible to fix the exterior body. As the crotch exterior body, the same materials as those used for the above-mentioned exterior body can be used.

(Post-processing tape)
A post-treatment tape 70 is provided at the center of the widthwise WD on the outer surface of the rear body B of the exterior body 12. As shown in FIG. 9, the post-treatment tape 70 is in a folded state in which the strip-shaped body is folded back twice in the anteroposterior direction LD and the three layers 71 to 73 are laminated, and the adjacent layers 71 to 73 are adhered to each other. It is bonded via the agent 74.

The strip-shaped body may be formed by connecting a plurality of sheets S1 to S4 as shown in FIG. 9, or may be formed by a single sheet as shown in FIG. When the strip is formed by connecting a plurality of sheets, the number of sheets is not particularly limited, and the strip may be composed of four sheets as shown in FIG. 14 or five sheets S1 to 5 as shown in FIG. It can be composed of S5, or can be composed of less or more sheets than these. As the sheets S1 to S5 constituting the post-treatment tape 70, a sheet made of an olefin resin such as polyethylene or polypropylene or a synthetic resin such as polyvinyl chloride or PET can be preferably used. Each sheet S1 to S5 may be made of a single-layer material or may be made of a plurality of layers of material.

In the post-treatment tape 70 shown in FIG. 9, an adhesive 74 is applied to the surface on the outer body 12 side, and the first sheet S1 fixed to the outer surface of the outer body 12 by the adhesive 74 and the first sheet S1. The second sheet S2 connected to the tip portion folded outward in the second sheet S2 and the third sheet S3 fixed to the tip portion folded outward in the second sheet S2 make a tri-fold of three layers 71 to 73 (three layers 71 to 73). A Z-shaped cross section) structure is formed. The second sheet S2 is detachably adhered to the first sheet S1 by the adhesive 74 applied to the surface on the first sheet S1 side, and the third sheet S3 is the adhesive 74 applied to the surface on the second sheet S2 side. Is detachably adhered to the second sheet S2. The surface of each sheet S1 to S3 opposite to the adhesive 74 side can be peeled off by applying a peeling process such as a release agent, and the portion where the adhesive 74 between the sheets S1 to S3 is adhered to each other. The adhesive portion to the exterior body 12 is connected so as not to be peeled off. Further, a colored tape S4 colored in an opaque color such as white by an adhesive 74 is connected to the tip end portion of the third sheet S3 to form a picked portion having good visibility. At the time of disposal, the diaper 100 is rolled or folded so that the top sheet 30 is on the inside and the front body F is on the inside, and then the post-treatment tape 70 is peeled off and unfolded as shown in FIG. As shown, it is fixed by the adhesive 74 of the third sheet S3 so as to be wound from the back body B of the rolled or folded diaper 100 to the outer surface on the opposite side beyond the waist opening WO.

The pressure-sensitive adhesive 74 is not particularly limited, and synthetic rubber-based pressure-sensitive adhesives, natural rubber-based pressure-sensitive adhesives, acrylic resin-based pressure-sensitive adhesives, silicone resin-based pressure-sensitive adhesives, and the like can be used.

Characteristically, as shown in FIG. 9, the lowermost layer is an entry layer 71 having an entry portion 75 on the upper surface thereof, and an intermediate layer overlapping the entry layer 71 covers the entire entry portion 75 and The cover layer 72 has an adhesive 74 on the lower surface. As shown in FIG. 10, the cover layer 72 can be peeled off from the entry layer 71 together with the adhesive 74 on the lower surface without leaving the adhesive 74 on the lower surface on the entry portion 75, and the cover layer 72 is the lower surface thereof. As shown in FIG. 9, the pressure-sensitive adhesive 74 can be re-adhesive to the entry layer 71. In the case of the illustrated example, as shown in FIG. 11, the uppermost layer 73 can also be peeled off from the cover layer 72 together with the adhesive 74 on the lower surface without leaving the adhesive 74 on the lower surface on the entry portion 75, and is the most. The upper layer 73 can be reattached to the cover layer 72 by the adhesive 74 on the lower surface thereof. Further, the items to be entered in the entry section 75 can be seen through all the layers 72 and 73 located above the entry layer 71. Therefore, at least the sheet of the layer 73 above the cover layer 72 can be a transparent or translucent sheet.

In this pants-type disposable diaper, as shown in FIGS. 10 and 11, the cover layer 72 was once peeled off from the entry layer 71 before use, and entry items 76 such as names were entered in the entry section 75 with an oil-based pen or the like. Later, as shown in FIG. 9, the cover layer 72 can be replaced and reattached to the entry layer 71. Part or all of the entry 76 of the entry section 75 is transparent through all layers 72, 73 located above the entry layer 71. Therefore, since the entry section 75 is covered with the cover layer 72 and is not exposed, the entry section 75 minutes and the clothes worn on the entry section 75 are rubbed against each other, making it impossible to distinguish the entry contents or transferring ink to the clothes. There is no problem of entry retention. Furthermore, there is an advantage that the name and the like can be inevitably confirmed at the time of post-processing. Further, as shown in FIG. 13, the entry section 75 is not hidden inside the rolled or folded absorbent article when it is in the disposal state, so that the description of the entry section 75 can be confirmed even in the disposal state. There is also an advantage.

When the post-treatment tape 70 is a resin film, it is preferable that the writing portion 75 has a rough surface portion so that writing with oil-based ink or a pencil can be performed. In particular, in order to improve the peelability of the pressure-sensitive adhesive 74, it is desirable to apply the release agent of the pressure-sensitive adhesive 74 to the entry portion 75, and in that case, the oil-based ink may be difficult to fix. However, if the entry portion 75 is a rough surface portion, the oil-based ink enters the concave portion of the rough surface portion and is easily fixed. The rough surface portion can be applied without particular limitation as long as it is a known rough surface that can be written with an oil-based pen or a pencil. For example, the rough surface portion can be formed by roughening the surface of the resin film, or may be an ink fixing layer added by a paint or the like.

The entry section 75 is preferably provided over a wide area on the upper surface of the entry layer 71, but may be only a part thereof. For example, the entry section 75 is preferably in a range of 50% or more in the longitudinal direction (LD in the front-rear direction) of the entry layer 71, and preferably in a range of 50% or more in the width direction WD. Further, in consideration of ease of entry, the dimension of the width direction WD of the entry portion 75 is preferably 15 mm or more, for example, 20 to 30 mm, and the dimension in the longitudinal direction (front-back direction LD) is 60 mm or more, for example, 70 to 80 mm. It is preferable to have. The dimensions of the post-treatment tape 70 can be appropriately determined, but are preferably equal to or larger than the dimensions of the entry portion 75. It is preferable to have.

In the post-treatment tape 70 having a number of folds of Z or more as shown in FIG. 9, the entry portion 75 may be provided in a layer other than the bottom layer, for example, an intermediate layer, as long as it is at least one layer other than the uppermost layer 73. The uppermost layer 73 serves as a cover layer. However, as shown in the illustrated example, when the entry layer 71 is the lowest layer 71 and at least the lower surface of the entry portion 75 is fixed to the exterior body 12, the entry layer 71 is fixed to the exterior body 12. There is an advantage that it is easy to fill in and it is easy to replace the cover layer 72.

In the general post-treatment tape 70, the gripped portion at the tip is not sticky and it is easy to pick up, but in the general post-treatment tape 70 having a number of folds of Z or more, it overlaps on the bottom layer. The entire layer is adherent to the bottom layer. In this case, if the bottom layer is the entry layer 71, the cover layer 72 may be difficult to pinch, and it may be difficult to peel off only the cover layer 72 when entering a name or the like. On the other hand, as shown in FIG. 14, the end portion 72e of the cover layer 72 on the side continuous with the layer 73 overlapping the cover layer 72 is not fixed to the entry layer 71, or the cover layer is as shown in FIG. It is preferable that the end portion 72e on the side of 72 that is continuous with the layer 73 that overlaps the layer 73 protrudes from the end portion of the entry layer 71. This makes it easier to pinch the peeling start end of the cover layer 72 (the end on the side continuous with the layer 73 overlapping the cover layer 72), and it becomes easier to peel off only the cover layer 72 when writing a name or the like.

As shown in FIG. 17, the post-treatment tape 70 has a structure in which the strip-shaped body is folded back only once in the anteroposterior direction LD and the two layers 71 and 72 are laminated (folded in half), and the adjacent layers 71 are formed. , 72 may have a structure in which they are bonded together via an adhesive 74. Further, although not shown, the post-treatment tape 70 may be a strip-shaped body folded three times or more.

The post-treatment tape 70 can be provided in place on the absorbent article. In the case of pants-type disposable diapers, as shown in FIG. 9, it is generally provided on the back body B, but it may be provided on the front body F, or it may be provided on both the back body B and the front body F. Both sides of the back body B or the front body F may be provided along the width direction WD.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The present invention is suitable for pants-type disposable diapers having a post-treatment tape as in the above example, but can be used for all absorbent articles as long as the post-treatment tape is provided.

11 ... Liquid impermeable sheet, 12 ... Exterior body, 12A ... Side seal part, 12r ... Folded part, 200 ... Interior body, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rise gather, 62 ... Gather sheet, 70 ... Post-treatment tape, 71 ... Filling layer, 72 ... Cover layer, 73 ... Top layer, 71-73 ... Layer, 74 ... Adhesive, S1 ... First Sheet, S2 ... 2nd sheet, S3 ... 3rd sheet, 75 ... entry section, 76 ... entry items, WD ... width direction, LD ... front-back direction.