JP7456888B2 - Method for manufacturing pants-type disposable wearing articles - Google Patents

Description

The present invention relates to a method for manufacturing a pants-type disposable wearing article in which a front exterior body and a rear exterior body are not continuous on the crotch side but are spaced apart in the front-rear direction.

As a form of pants-type disposable wearing article, there is an exterior body formed into a cylindrical shape by joining both sides of the front exterior body and both sides of the rear exterior body with side seals, and a cylindrical exterior body formed from the front exterior body through the groin area. It is known that the front exterior body and the rear exterior body are separated from each other in the front and rear direction without being continuous on the crotch side, and are provided with an interior body provided over the inner surface of the rear exterior body (for example, Patent Documents 2 to 5 reference). Such a two-piece exterior type has the advantage that the exterior body does not need to be cut out to form the leg openings, or even if it is cut out, only a small area is required. That is, since the cut-off piece (trim) is disposed of, it has the advantage that waste of material (trim loss) can be suppressed. (For example, see Patent Documents 1 to 3).

In pants-type disposable diapers with a two-part exterior, the inner body is generally bonded to the front and rear outer bodies with a hot melt adhesive, and the adhesive is provided over almost the entire area where the inner body overlaps with the front and rear outer bodies.

However, there is a limit to the accuracy of hot melt adhesive application, and in order to avoid the hot melt adhesive from spilling out to areas other than the overlapping areas between the interior body, front exterior body, and rear exterior body, conventional manufacturing methods It was difficult to join near the periphery of the area.

Patent No. 5790031 Japanese Patent Application Publication No. 2014-028308 Japanese Patent Application Publication No. 2011-101813

Therefore, the main object of the present invention is to enable bonding with higher precision up to the crotch side edge and near both side edges when bonding the overlapping areas of the interior body, front exterior body, and rear exterior body. etc.

A method for manufacturing a pants-type disposable wearing article that solves the above problems is as follows.
<First aspect>
a front exterior body that constitutes at least the waist circumference of the front body;
a rear exterior body constituting at least the waist circumference of the rear body;
an interior body extending in the front-rear direction from the front exterior body to the rear exterior body;
an adhesive part where the interior body is joined to the front exterior body and the rear exterior body through a hot melt adhesive in an overlapping region where they overlap each other;
a side seal in which both sides of the front exterior body and both sides of the rear exterior body are respectively joined;
Equipped with a waist opening and a pair of left and right leg openings,
The front exterior body and the rear exterior body are separated in the front-rear direction,
One or both of the bonded portions between the interior body and the front exterior body and the bonded portions between the interior body and the rear exterior body have a width that spans both sides of the overlapped region, and a width that spans both sides of the overlapped region. A method for manufacturing a pants-type disposable wearing article extending from an edge on the crotch side to an edge on the waist opening side of the overlapping region, the method comprising:
A front continuous body in which the portion that becomes the front exterior body is repeated and continuous, and the continuous direction is the width direction of the front exterior body, and the part that becomes the rear exterior body is repeated and continuous, and the continuous direction is the width of the rear exterior body. an exterior continuum forming step of forming a rear continuum that serves as a direction;
an interior continuum forming step in which the interior continuum is formed in which the portion that will become the interior body is repeated and the continuous direction is the front-rear direction of the interior body;
While conveying the front continuous body and the rear continuous body along the continuous direction, the edge on the crotch side of the region of the front continuous body and the rear continuous body that will become the adhesive part of one or both of them. a first application step of applying a first hot melt adhesive to;
While conveying the interior continuum along its continuous direction, the interior continuum is transported to a portion of the interior continuum that includes the entire area other than the area where the first hot melt adhesive is applied, of the area that will become one or both of the adhesive parts. , a second application step of applying a second hot melt adhesive;
an interior continuous body cutting step of cutting the interior continuous body at regular intervals in the MD direction to sequentially form the interior bodies;
While conveying the front continuous body and the rear continuous body parallel to each other and in alignment with the adhesion position with the interior body in the MD direction, respectively, along the continuous direction, the inner body is placed over the front continuous body and the rear continuous body. an adhesion step of stacking and forming an interior assembly in which the front continuous body, the rear continuous body, and the interior body are joined via the first hot melt adhesive and the second hot melt adhesive;
After folding the interior assembly in half in the CD direction, the front continuous body and the rear continuous body are joined at the portions that become both sides of each article, and the front continuous body and the rear continuous body are folded into individual articles. and a side seal and cutting step of cutting at the boundary of the
A method for manufacturing a pants-type disposable wearing article, characterized by:

(effect)
When applying hot melt adhesive to a conveyed object, the accuracy of the application position in the CD direction (orthogonal direction to the MD direction) is higher than the accuracy of the application position in the MD direction (machine direction, conveyance direction). . The manufacturing method of this embodiment skillfully utilizes this.

In other words, in the method for manufacturing pants-type disposable wearing articles, the continuous direction of the front continuous body and the rear continuous body is the width direction of the product, whereas the continuous direction of the interior continuous body is the front-back direction of the product, and the continuous direction of the interior continuous body is the width direction of the product. It is common to change the direction of the inner body cut out from the body when joining it to the front continuous body and the rear continuous body. In such a manufacturing method, when applying the hot melt adhesive to the front continuous body and the rear continuous body, the accuracy of the application position in the longitudinal direction (CD direction) of the product is high. Therefore, for the hot melt adhesive to be placed on the edge of the crotch side of the adhesive part, while conveying the front continuous body and the rear continuous body along the continuous direction, the hot melt adhesive is placed on the crotch side edge of one or both of the adhesive parts. By applying the first hot melt adhesive to the side edges, the first hot melt adhesive can be applied with high accuracy up to the vicinity of the crotch side edge of the overlapping region.

On the other hand, when applying the hot melt adhesive to the interior continuous body, the accuracy of the application position in the width direction (CD direction) of the product is high. Therefore, for the hot melt adhesive to be placed in areas other than the crotch side edge of the adhesive part, while the interior continuum is being conveyed along the continuous direction, the first hot melt adhesive is placed in the area that will become the adhesive part. By applying the second hot melt adhesive to the entire area other than the application area, the second hot melt adhesive can be applied with high accuracy up to near both side edges of the overlapping area.

As is clear from the above, by combining the application of the first hot melt adhesive and the application of the second hot melt adhesive described above, the edge of the crotch side of the overlapping region of the front exterior body, the rear exterior body, and the interior body It is possible to bond up close and close to both side edges with higher precision.

<Second aspect>
In the first application step, a first hot melt adhesive is applied in a continuous pattern in the MD direction ,
In the second application step, a second hot melt adhesive is applied in an intermittent pattern in both the MD direction and the CD direction.
A method for manufacturing a pants-type disposable wearing article according to the first aspect.

(effect)
As in this embodiment, a pattern that is continuous in the MD direction (width direction of the product) and has a relatively high basis weight is limited to the edge of the crotch side where stronger adhesion is required among the adhesive parts. The first hot melt adhesive is applied to other parts, and the second hot melt adhesive is applied to other parts in an intermittent pattern in both the MD direction (the front and back direction of the product) and the CD direction, and with a relatively low basis weight. By applying the hot melt adhesive, it is possible to improve the adhesive strength of the edge on the crotch side in the overlapping region while suppressing a decrease in flexibility of the adhesive part as a whole.

<Third aspect>
The basis weight of the second hot melt adhesive is 3 to 20 g / m ² , and the basis weight of the first hot melt adhesive is 1.5 to 10 times the basis weight of the second hot melt adhesive,
A method for producing the pants-type disposable wearing article according to the second aspect.

(effect)
The application amounts of the first hot melt adhesive and the second hot melt adhesive can be determined as appropriate, but within the range of this embodiment, it is possible to suppress a decrease in flexibility of the adhesive part as a whole, and to protect the interior and exterior parts. This is preferable not only because it improves the adhesive strength of the edge on the crotch side of the adhesive part with the body, but also because it makes it difficult for the hot melt adhesive to seep through the exterior body.

<Fourth aspect>
The distance in the CD direction between the edge of the crotch side of the one or both overlapping regions and the application position of the first hot melt adhesive is 0 to 10 mm,
The distance in the MD direction between both ends of the one or both overlapping regions in the MD direction and both ends of the application position of the first hot melt adhesive in the MD direction is 5 to 15 mm,
The distance in the front-rear direction between the edge of the crotch side of the one or both overlapping regions and the application position of the second hot melt adhesive is 5 to 15 mm,
The distance in the MD direction between both ends in the MD direction of the region serving as one or both overlapping regions and both ends in the MD direction of the application position of the second hot melt adhesive is 0 to 10 mm.
A method for producing a pants-type disposable wearing article according to any one of the first to third aspects.

(effect)
By employing the above manufacturing method, it is possible to arrange the hot melt adhesive close to the edge of the overlapping region, for example, as in this embodiment. As a result, it is possible to prevent the non-adhesive edges of the product from fluttering and deteriorating the appearance and wearing comfort.

The present invention makes it possible to bond with greater precision to the crotch side edge and both side edges of the overlapping areas between the inner body and the front and rear outer bodies.

FIG. 2 is a plan view showing the inner surface of the pant-type disposable diaper in an unfolded state. FIG. 2 is a plan view showing the outer surface of the pant-type disposable diaper in an unfolded state. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. 2 is a sectional view taken along line 3-3 in FIG. 1. FIG. (a) A 4-4 sectional view in FIG. 1, and (b) a 5-5 sectional view in FIG. 1. FIG. 1 is a perspective view of a pants-type disposable diaper. FIG. 3 is a plan view showing the outer surface of the interior body in an expanded state together with the outline of the exterior body. FIG. 3 is a plan view showing the outer surface of the interior body in an expanded state together with the outline of the exterior body. 2 is a sectional view of another example corresponding to the 2-2 section in FIG. 1. FIG. FIG. 2 is a plan view showing the outer surface of the pant-type disposable diaper in an unfolded state. 4 is an enlarged view of the main part of FIG. 3. FIG. FIG. 3 is an enlarged plan view of a non-stretchable region. FIG. 3 is a plan view showing an enlarged view of the inner surface of the front exterior body. FIG. 3 is an enlarged plan view showing an enlarged inner surface of the rear exterior body. FIG. 3 is an enlarged plan view showing an enlarged outer surface of the front exterior body. FIG. 3 is an enlarged plan view showing an enlarged outer surface of the rear exterior body. FIG. 3 is an enlarged plan view showing an enlarged outer surface of the front exterior body. FIG. 3 is an enlarged plan view showing an enlarged outer surface of the rear exterior body. FIG. 3 is a plan view schematically showing the manufacturing flow. FIG. 3 is a plan view schematically showing the manufacturing flow. FIG. 2 is a perspective view schematically showing a cutting device. FIGS. 3A and 3B are plan views showing combinations of hot melt adhesive application patterns; FIGS.

Hereinafter, a pants-type disposable diaper will be explained in detail as an example of a pants-type disposable wearing article with reference to the accompanying drawings. The dotted pattern in the cross-sectional view indicates the adhesive used as a joining means for joining each component located on the front and back sides, and may be solid, bead, curtain, summit, or spiral application of hot melt adhesive, or pattern coating. (transferring hot melt adhesive using a letterpress method), or alternatively or in addition to this, the fixed part of the elastic member is formed by applying it to the outer circumferential surface of the elastic member using a comb gun or SureWrap coating. be. Examples of hot melt adhesives include EVA adhesives, adhesive rubber adhesives (elastomer adhesives), olefin adhesives, and polyester/polyamide adhesives, which can be used without particular limitation. As a joining means for joining each component, means by material welding such as heat sealing or ultrasonic sealing can also be used.

1 to 6 show an example of a pants-type disposable diaper. This pants-type disposable diaper includes a rectangular front exterior body 12F that constitutes at least the waist circumference of the front body F, a rectangular rear exterior body 12B that constitutes at least the waist circumference of the back body B, and a rectangular rear exterior body 12B that constitutes at least the waist circumference of the front body F, and a section between the front body 12F and the crotch. The interior body 200 is provided inside the exterior bodies 12F and 12B so as to extend through the rear exterior body 12B. Both sides of the front exterior body 12F and both sides of the rear exterior body 12B are joined to form a side seal 12A, so that the opening formed by the front and rear ends of the exterior bodies 12F and 12B is accessible to the wearer. A waist opening WO is formed through which the torso is passed, and a portion surrounded by the lower edges of the outer bodies 12F, 12B and the side edges of the interior body 200 on both sides of the interior body 200 in the width direction is a leg opening LO through which the legs are passed. The inner body 200 is a part that absorbs and holds excrement such as urine, and the outer bodies 12F and 12B are parts that support the inner body 200 against the wearer's body. Further, the symbol Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO in the front body F to the edge of the waist opening WO in the back body B), and the symbol X indicates the diaper in the unfolded state. The full width is shown.

This pants-type disposable diaper has a waist region T defined as the front-rear range having the side seal 12A (the front-rear range from the waist opening WO to the upper end of the leg opening LO), and an intermediate region L defined as the front-rear range of the portion forming the leg opening LO (between the front-rear region having the side seal 12A of the front body F and the front-rear region having the side seal 12A of the back body B). The waist region T can be conceptually divided into a "waist portion" W that forms the edge of the waist opening, and a "lower waist portion" U that is the portion below this. Normally, when there is a boundary within the waist region T where the stretch stress in the width direction WD changes (for example, the thickness or elongation rate of the elastic member changes), the waist region W is the portion closer to the waist opening WO than the boundary closest to the waist opening WO, and when there is no such boundary, the waist extension portion 12E that extends further toward the waist opening WO than the absorbent body 56 or the inner body 200 is the waist region W. These front-to-rear lengths vary depending on the size of the product and can be set as appropriate, but as an example, the waist portion W can be 15-40 mm, and the lower waist portion U can be 65-120 mm. Meanwhile, both side edges of the middle region L are narrowed in a U-shape or curved shape to fit around the wearer's legs, and these are the areas where the wearer's legs are inserted. As a result, the pants-type disposable diaper in the unfolded state has a roughly hourglass shape overall.

(Interior body)
Although the interior body 200 can have any shape, it is rectangular in the illustrated example. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 facing the body, a liquid-impermeable sheet 11, and an absorbent element 50 interposed between these. This is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorbent element 50; 2 shows riser gathers 60 extending from both sides of the interior body 200 so as to come into contact with the wearer's legs in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has the property of permeating liquid, and may be, for example, a perforated or non-perforated nonwoven fabric, a perforated plastic sheet, or the like. Further, the top sheet 30 may be made of a single sheet, or may be made of a laminated sheet obtained by laminating two or more sheets together. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

Both side portions of the top sheet 30 may be folded back at the side edges of the absorbent element 50, or may be allowed to protrude laterally from the side edges of the absorbent element 50 without being folded back.

The top sheet 30 may be fixed to a member adjacent to the back side using a bonding means such as heat sealing or ultrasonic sealing or hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. desirable. In the illustrated example, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(intermediate sheet)
In order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorbent body, an intermediate sheet (also called a "second sheet") 40, which has a higher liquid permeation rate than the top sheet 30, can be provided. This intermediate sheet 40 is for quickly transferring the liquid to the absorbent body, improving the absorption performance of the absorbent body, and preventing the phenomenon of “returning” of the absorbed liquid from the absorbent body. The intermediate sheet 40 can also be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bonded nonwoven fabric, or crepe paper. In particular, air-through nonwoven fabrics are preferred because they are bulky. It is preferable to use a composite fiber with 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) with high rigidity is preferable. The basis weight is preferably 17 to 80 g/m ² , more preferably 25 to 60 g/m ² . The thickness of the raw material fibers of the nonwoven fabric is preferably 2.0 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers whose core is not in the center, hollow fibers, or eccentric and hollow fibers as the mixed fibers for all or part of the raw material fibers.

In the illustrated example, the intermediate sheet 40 is positioned in the center and is shorter than the width of the absorbent body 56, but it may be provided across the entire width. The length of the intermediate sheet 40 in the front-to-rear direction may be the same as the entire length of the diaper, the same as the length of the absorbent element 50, or within a short length range centered on the area that receives liquid.

The intermediate sheet 40 may be fixed to a member adjacent to the back side using a bonding means such as heat sealing or ultrasonic sealing or hot melt adhesive for the purpose of preventing misalignment of the intermediate sheet 40 with respect to the member on the back side. desirable. In the illustrated example, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but includes, for example, a plastic film made of olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric with a plastic film on the surface of the nonwoven fabric, and a plastic film. Examples include laminated sheets in which nonwoven fabrics and the like are laminated and bonded. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferred from the viewpoint of preventing stuffiness. Moisture-permeable plastic films include microporous plastic films obtained by kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching it uniaxially or biaxially. is widely used. Other methods include non-woven fabrics using micro-denier fibers, strengthening leak-proofing by reducing fiber pores by applying heat or pressure, and coating with super absorbent or hydrophobic resins or water repellent agents. Accordingly, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11, but it must have sufficient adhesive strength when bonded to the cover nonwoven fabric 13 via a hot melt adhesive, which will be described later. In order to obtain this, it is desirable to use a resin film.

The liquid-impermeable sheet 11 has a width that fits on the back side of the absorbent element 50 as shown in the figure, and also wraps around both sides of the absorbent element 50 so as to fit on the side surface of the top sheet 30 of the absorbent element 50 in order to improve leakage prevention. It can also extend to both sides. The appropriate width of this extending portion is about 5 to 20 mm on each side.

(absorption element)
The absorbent element 50 includes an absorbent core 56 and a packaging sheet 58 that completely wraps around the absorbent core 56. The packaging sheet 58 can also be omitted.

(Absorber)
The absorbent body 56 can be formed from an aggregate of fibers. These fiber aggregates include those obtained by stacking short fibers such as cotton pulp and synthetic fibers, as well as filament aggregates obtained by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber weight can be, for example, about 100 to 300 g/m ² when stacking cotton-like pulp or short fibers, and about 30 to 120 g/m ² in the case of filament aggregates. I can do it. The fineness of synthetic fibers 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 assembly, the filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimps of the crimped fibers can be, for example, about 5 to 75 crimps, preferably 10 to 50 crimps, and more preferably 15 to 50 crimps per 2.54 cm. Further, crimped fibers that are uniformly crimped can be used. Preferably, superabsorbent polymer particles are dispersed and held in the absorbent body 56.

The absorbent body 56 may have a rectangular shape, but as shown in FIG. This is preferable because the fit of the riser gathers 60 around the legs is improved.

Further, the dimensions of the absorbent body 56 can be determined as appropriate as long as they extend to the front, back, left and right of the urinary opening position, but it is preferable that the absorber 56 extends to or near the peripheral edge of the interior body 200 in the front-rear direction LD and the width direction WD. . In addition, the code|symbol 56X has shown the full width of the absorber 56.

(Super absorbent polymer particles)
The absorbent body 56 can contain superabsorbent polymer particles in part or in whole. The term "superabsorbent polymer particles" includes "powder" in addition to "particles." As the superabsorbent polymer particles, those used in this type of disposable diapers can be used as they are. It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and when sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1:2006), the proportion of particles remaining on the sieve is 60% by weight or less. % by weight or more is desirable.

Although any material can be used for the superabsorbent polymer particles without particular limitation, those with a water absorption of 40 g/g or more are preferred. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles, including starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and cross-linked sodium carboxymethyl cellulose. Materials such as acrylic acid (salt) and acrylic acid (salt) polymers can be used. The shape of the superabsorbent polymer particles is preferably a commonly used powder or granule, but other shapes can also be used.

The highly absorbent polymer particles preferably have a water absorption speed of 70 seconds or less, and particularly 40 seconds or less. If the water absorption speed is too slow, the liquid supplied to the absorbent body 56 tends to flow back out of the absorbent body 56, which is known as backflow.

In addition, highly absorbent polymer particles with a gel strength of 1000 Pa or more are preferably used. This effectively prevents the sticky feeling after absorbing liquid, even when the absorbent body 56 is bulky.

The basis weight of the superabsorbent polymer particles can be determined as appropriate depending on the amount of absorption required for the use of the absorber 56. Therefore, it can be set at 50 to 350 g/m ² , although it cannot be generalized. If the basis weight of the polymer is less than 50 g/m ² , it becomes difficult to ensure sufficient absorption. If it exceeds 350 g/ ^m2 , the effect will be saturated.

(packaging sheet)
When the packaging sheet 58 is used, tissue paper, especially crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a perforated sheet, etc. can be used as the material. However, it is desirable that the sheet be a sheet that does not allow the superabsorbent polymer particles to escape. When using a nonwoven fabric instead of crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and its material may be polypropylene, polyethylene/polypropylene composite, or the like. The basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

The packaging structure of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of superabsorbent polymer particles from the front and rear edges, a cylinder is used to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable to wrap the absorbent body into a shape, with its front and rear edges protruding from the front and rear sides of the absorber 56, and to join the overlapping portions and the overlapping portions of the front and rear protruding portions using a joining means such as hot melt adhesive or material welding.

(get up and gather)
The rising gathers 60 has a rising portion 68 that rises from the side of the interior body 200, and this rising portion 68 comes into contact with the range from the wearer's groin area through the leg area to the buttocks to prevent side leakage. It is something. In the illustrated rising gathers 60, the base portion 60B stands up obliquely toward the center in the width direction, and the tip end portion 60A stands up obliquely toward the outside in the width direction from the middle portion. It is not limited to this, and appropriate changes can be made, such as one that stands up on the center side in the width direction as a whole.

To explain in more detail, the raised gathers 60 in the illustrated example is made by folding a band-shaped gather sheet 62 having a length equal to the length of the interior body 200 in the front-rear direction in the width direction WD at the tip and folding it in half. In addition to overlapping, a plurality of elongated gather elastic members 63 are fixed at intervals in the width direction WD in a stretched state along the longitudinal direction between the folded portions and the sheets in the vicinity thereof. The proximal end portion of the rising gathers 60 located on the opposite side to the tip portion (the end portion on the opposite side to the sheet folded portion in the width direction WD) is fixed to the side portion of the interior body 200 on the back side of the liquid-impermeable sheet 11. A portion other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65. Further, the main body portion 66 includes a root portion 60B extending toward the center in the width direction, and a tip portion 60A that is folded back at the tip of the root portion 60B and extending outward in the width direction. Both end portions of the main body portion 66 in the front and back direction are set as a collapsed portion 67 that is fixed to the side surface of the top sheet 30 in a collapsed state, while the intermediate portion in the front and rear direction located between these ends is not fixed. A gathered elastic member 63 along the front-rear direction LD is fixed to at least the distal end portion of the rising portion 68 in an extended state.

In the rising gathers 60 configured as described above, the rising portion 68 rises to come into contact with the skin as shown by the arrow in FIG. 3 due to the contraction force of the gather elastic member 63. In particular, when the root portion 65 is located on the back side of the interior body 200, the rising portion 68 stands up in the crotch region and its vicinity so as to open outward in the width direction, so that the rising gathers 60 come into contact with the area around the legs. This will improve the fit. The root portion 65 can also be fixed to the front side of the interior body 200, for example, to the surface of both sides of the top sheet 30.

Like the rising gathers 60 in the illustrated example, the main body portion 66 is bent to consist of a root side portion 60B that extends toward the center in the width direction, and a tip side portion 60A that is folded back at the tip of this root side portion 60B and extends outward in the width direction. In the structure, the tip side portion 60A and the base side portion 60B are joined in a laid down state at the laid down portion 67, and the base side portion 60B is joined to the top sheet 30 in a laid down state. For joining the opposing surfaces in the collapsed portion 67, at least one of hot melt adhesives using various coating methods and material welding methods such as heat sealing and ultrasonic sealing can be used. In this case, the joining of the root side portion 60B and the top sheet 30 and the joining of the tip side portion 60A and the root side portion 60B may be performed by the same means or by different means. For example, it is preferable that the root side portion 60B and the top sheet 30 be joined using a hot melt adhesive, and that the tip side portion 60A and the root side portion 60B be joined by material welding.

The gather sheet 62 is made of a flexible nonwoven fabric with excellent uniformity and concealment properties such as spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), meltblown nonwoven fabric, etc., and if necessary, water repellent with silicone etc. Those that have been treated can be suitably used. In this case, the fiber basis weight of the nonwoven fabric is preferably about 10 to 30 g/m ² . Further, as in the example shown in FIG. 9, a waterproof film 64 can be interposed between the gathered sheet 62 folded in two.

As the gather elastic member 63, a rubber thread or the like can be used. When using spandex rubber thread, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate of the gathered elastic member 63 in the attached state is preferably 150 to 350%, more preferably 200 to 300%. The number of gather elastic members 63 is preferably 2 to 6, more preferably 3 to 5. The appropriate spacing between the gather elastic members 63 is 3 to 10 mm. With this configuration, the area in which the gathered elastic member 63 is arranged can easily come into contact with the skin. The gather elastic member 63 may be arranged not only on the tip side but also on the base side.

In the rising portion 68 of the rising gathers 60, hot melt adhesive, heat sealing, and ultrasonic waves are applied by various application methods to bond the inner and outer layers of the gather sheet 62 and to fix the gather elastic member 63 sandwiched therebetween. At least one of fixing means by material welding, such as a seal, can be used. If the entire surfaces of the inner layer and outer layer of the gather sheet 62 are bonded together, the flexibility will be lost, so it is preferable that the portions of the gather elastic member 63 other than the bonded portions are not bonded or bonded weakly. In the illustrated example, the gathered elastic member 63 is coated with hot melt adhesive only on the outer peripheral surface of the gathered elastic member 63 using a coating means such as a comb gun or a sure wrap nozzle, and is sandwiched between the inner and outer layers of the gathered sheet 62. The structure is such that the gather elastic member 63 is fixed to the inner layer and outer layer of the gather sheet 62, and the inner layer and outer layer of the gather sheet 62 are fixed using only the hot melt adhesive applied to the outer peripheral surface of the gather sheet 62. There is.

Similarly, the fallen portion 67 can be fixed using at least one of a variety of application methods of hot melt adhesive and material welding such as heat sealing or ultrasonic sealing.

(side flap)
As shown in FIG. 3, FIG. 4, FIG. 11, FIG. 13, FIG. It is preferable that the flap 70 is formed with a side elastic region SG that expands and contracts in the front-rear direction. The illustrated side flap 70 includes one or more elongated side elastic members 73 provided along the front-rear direction LD at intervals, and a first sheet facing the outside of the side elastic members 73. layer 71 and a second sheet layer 72 facing inside of the side elastic member 73.

The sheet material forming the first sheet layer 71 and the second sheet layer 72 is not particularly limited, and any appropriate nonwoven fabric can be selected, such as the nonwoven fabric that can be used in the riser gathers 60 described above or the exterior bodies 12F and 12B described above. . In the examples shown in FIGS. 3, 4, and 11, the gather sheet 62 of the rising gathers 60 is extended to form the first sheet layer 71 and the second sheet layer 72, as described later. In this case, the front and rear ends of the side flaps 70 coincide with the front and rear ends of the rising gathers 60 (that is, the front and rear ends of the interior body 200 in this case).

The side elastic members 73 are not particularly limited, and can be elongated elastic members similar to the gathered elastic members 63 described above. The extension rate of the side elastic members 73 in the attached state is preferably 150 to 350%, and more preferably 200 to 270%. The number of side elastic members 73 is preferably 2 to 16, and more preferably 6 to 10. The appropriate spacing between the side elastic members 73 is 5 to 10 mm.

The side elastic member 73 is fixed to the first sheet layer 71 and the second sheet layer 72. For bonding the first sheet layer 71 and the second sheet layer 72 and fixing the side elastic member 73 sandwiched between them, hot melt adhesive HM is applied using various coating methods, and material welding is performed using heat sealing, ultrasonic sealing, etc. Fixing means can be used. If the bonding area of the first sheet layer 71 and the second sheet layer 72 is large, flexibility will be impaired, so it is preferable that the portions of the side elastic members 73 other than the bonded portions are not bonded or are bonded weakly. In the illustrated example, by applying the hot melt adhesive HM only to the outer circumferential surface of the side elastic member 73 using a coating means such as a comb gun or a sure wrap nozzle, and sandwiching it between the first sheet layer 71 and the second sheet layer 72, The side elastic member 73 can be fixed to the first sheet layer 71 and the second sheet layer 72, and the first sheet layer 71 and the second sheet layer can be fixed using only the hot melt adhesive HM applied to the outer peripheral surface of the side elastic member 73. It has a structure that fixes between 72 and 72.

The attachment range of the side elastic member 73 in the front-rear direction, that is, the range in the front-rear direction in which the side elastic region SG is formed, can be determined as appropriate, but it may be the same as or more than the range in the front-rear direction of the non-joined portion 77, which will be described later. Preferably, the range is wide. Further, it is also preferable that the range of the side elastic region SG in the front-rear direction is the same as the contracted portion by the gathered elastic member of the rising gathers, or extends further to both front and rear sides.

The side flap 70 has three or more sheet layers including a first sheet layer 71 and a second sheet layer 72. That is, in addition to the innermost sheet layer 74 and the outermost sheet layer 75, there is at least one inner sheet layer 76 located between them. Some or all of these sheet layers may be formed from separate sheet materials, or may be formed by folding back one sheet material once or multiple times. The inner sheet layer 76 can be appropriately selected from the above-mentioned gathered sheet 62, the liquid-impermeable sheet 11, or the same nonwoven fabric as the exterior bodies 12F and 12B described later, as well as the above-mentioned gathered sheet 62, It can be formed by extending or folding the liquid-impermeable sheet 11 as appropriate.

It is preferable that the side flap 70 has a non-joined portion 77 where at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined. Further, the non-jointed portion 77 is a portion that continues continuously or intermittently in the front-rear direction LD in the width direction WD including the region between the side elastic member 73 located at the most lateral side and the side edge of the side flap 70. It is. In other words, as long as either one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping on the back thereof are not bonded, the non-bonded portion 77 is formed between some or all of the other layers. may be bonded, or all sheet layers in the thickness direction may be non-bonded. For example, in the non-joined portion 77 shown in FIGS. 3, 4, and 11, the part where the innermost sheet layer 74 and the inner sheet layer 76 overlapping the back side are not joined is located at the most lateral side from the side edge. The part where the outermost sheet layer 75 and the inner sheet layer 76 overlapping the outermost sheet layer 76 are not joined continues to the center side in the width direction up to the fixed position of the side elastic member.

The dimension of the non-joint portion 77 in the width direction WD can be determined as appropriate, but is preferably 2 to 15 mm, particularly preferably 5 to 10 mm. Further, the dimension of the non-jointed portion 77 in the front-rear direction LD is preferably 30% or more, particularly 40% or more of the total product length Y. In addition, in the case of a pants-type disposable wearing article in which the front exterior body 12F and the rear exterior body 12B are separated from each other like the illustrated example, the non-joined portion 77 extends to a position where they overlap with the front exterior body 12F and the rear exterior body 12B, respectively. It is preferable. In this case, it is preferable that the non-jointed portion 77 extends over the entire length of the interior body 200 in the front-rear direction LD. Further, the non-jointed portion 77 extends only to a position between the front and rear edges of the interior body 200 and the elastic members 16 and 19 of the front exterior body 12F and the rear exterior body 12B closest to the leg opening LO. is also preferable. Further, the non-jointed portion 77 is connected to the elastic members 16 and 19 closest to the leg opening LO in the front exterior body 12F and the rear exterior body 12B, and the edge of the leg opening LO (the rear edge of the front exterior body 12F and the front side of the rear exterior body 12B). It may extend only to a position between the edges).

Further, a gap between at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back side thereof is closed on both sides of the non-joint portion 77 in the width direction WD. As shown in the illustrated example, one side of the gap in the non-joined portion 77 is closed by folding back the sheet material forming the innermost sheet layer 74 or the outermost sheet layer 75 at the side edge of the side flap 70, and the other side is closed. It can be closed by joining sheet layers adjacent in the thickness direction at appropriate locations using hot melt adhesive HM, welding means, or the like. Of course, both sides of the gap in the non-joint portion 77 can also be closed in the same way, for example by folding back the sheet material or by hot melt adhesive HM.

In this pants-type disposable diaper, the side flaps 70 contract in the front-rear direction LD as the side elastic members 73 contract, and as shown in FIG. It is formed. That is, the pleats of the side stretchable regions SG are formed in a portion of the side flap 70 including the non-joined portion 77 so as to be lined up in the front-rear direction LD. Here, the non-joint part 77 is a part where at least one of the innermost sheet layer 74 and the outermost sheet layer 75 and the inner sheet layer 76 overlapping the back thereof are not joined, and the gap between the sheet layers is , are closed on both sides of the non-joint portion 77 in the width direction WD. In addition, the non-jointed portion 77 has a widthwise WD range including a region between the side elastic member 73 located at the most lateral side and the side edge of the intermediate region L (a widthwise WD range that is equal to or greater than the region). range) and continues in the front-rear direction LD. That is, the hollow portion 80 surrounded by the sheet layer continues in the front-rear direction LD in the non-joined portion 77. As a result, the folds formed in the non-jointed portion 77 are formed by large expansion of at least one of the innermost sheet layer 74 and the outermost sheet layer 75, and are large and soft (that is, rich in cushioning properties). Become. Therefore, these large soft folds are formed on the inner side, outer side, both inner and outer sides of the side flap 70 including the side edges, or on the entire thickness direction, so that the end portion of the leg opening LO feels good to the touch.

The side elastic member 73 may be located near the side edge of the side flap 70, but the side elastic member 73 may be located in the vicinity of the side edge of the side flap 70 from the side edge to the center side in the width direction WD by 2 to 15 mm (particularly 5 to 10 mm). , it is preferable that the side elastic member 73 is not included, and a part or all of the non-joint part 77 is included. In this way, if the side elastic member 73 is sufficiently spaced from the side edge of the side flap 70 and the spaced apart part includes part or all of the non-joined part 77, it may be difficult to hold the product by hand when installing or purchasing the product. Since large folds rich in flexibility and cushioning are formed in the entire lateral thickness direction of the part that is pressed against the skin during wear or wearing (that is, the part having the side elastic members 73), the ends of the leg openings LO This is particularly preferred for improving the feel of the skin.

Although the positional relationship between the non-bonded portion 77 and the side elastic member 73 can be determined as appropriate, as shown in the illustrated example, it is preferable to have at least one side elastic member 73 at a position overlapping the non-bonded portion 77 in the thickness direction. This is preferable because the contractile force of the side elastic member 73 is directly applied to the non-bonded portion 77, and the shape retention of the folds in the non-bonded portion 77 is improved.

In the non-joined portion 77, the inner sheet layer 76 overlapping the innermost sheet layer 74 or the outermost sheet layer 75 may be fixed to the adjacent sheet layer on the opposite side as shown in FIG. (The first sheet layer 71 and the second sheet layer 72 in the illustrated example are bonded to each other with a hot melt adhesive HM), but as shown in FIG. It is particularly preferred that it is not fixed to the layer. As a result, folds are independently formed in the inner sheet layer 76 due to the contraction force of the side elastic members 73. In other words, the large swollen folds formed on the side flaps 70 are supported by the folds of the internal sheet layer 76 formed independently on the inside thereof, so that folds with better cushioning properties are formed on the side flaps 70. Become so.

As illustrated, the side flap 70 has a folded sheet layer folded back at the side edge of the side flap 70, and at least one of the innermost sheet layer 74 and the outermost sheet layer 75 of the side flap 70. It is preferable that the folded sheet layer is located on one side across the folding position of the folded sheet layer because the cushioning properties of the folds formed in the non-joined portion 77 are particularly improved due to the restoring force against folding. The folded sheet layer means a pair of layers formed by folding back a sheet material.

One preferred example is the structure shown in FIG. This side flap 70 has double folded sheet layers folded back at its side edges. The innermost sheet layer 74 and the outermost sheet layer 75 of the non-joined portion 77 are an inner part and an outer part, respectively, sandwiching the folding position of the folded sheet layer located outside, and form an inner sheet. The layer 76 includes an inner portion and an outer portion across the folding position of the folded sheet layer located inside. In addition, the first sheet layer 71 and the second sheet layer 72 are respectively an inner part with the folding position of the folded sheet layer located inside, and a part inner with the folding position of the folded sheet layer located outside. Contains. Further, the non-joined portion 77 is a portion where a portion outside the folded sheet layer located on the outside with the folding position sandwiched therein and a portion outside the folded sheet layer located on the inside with the folded position sandwiched therebetween are not joined. Contains. In this structure, by arranging double folded sheet layers, it is possible to form two sheet layers other than the first sheet layer 71 and the second sheet layer 72, and each of them has a restoring force against folding. Therefore, pleats having better cushioning properties can be formed in the side flap 70 using less sheet material.

When the non-joining portion 77 has a four-layer structure as in this example, it is preferable to construct the side flaps 70 using a sheet of rising gathers 60 as in the example shown in FIG. That is, the folded sheet layer of the side flap 70 described above has a two-layer structure of the sheet of the rising gathers 60, which is formed by extending from the starting point of the rising gathers 60 to the side edge of the side flap 70, and the first portion P1 formed by the rising gathers 60. A two-layer structure of 60 sheets can be formed by folding back at the side edge of the side flap 70 and a second portion P2 extending toward the center in the width direction WD.

The side flaps 70 can also be omitted as in the examples shown in FIGS. 9 and 10.

(exterior body)
The exterior bodies 12F, 12B include a rectangular front exterior body 12F, which is a portion of the front body F that constitutes at least the waist circumference, and a rectangular rear exterior body 12B, which is a portion that constitutes at least the waist circumference of the back body B. The front exterior body 12F and the rear exterior body 12B are not continuous on the crotch side, but are separated in the front-rear direction LD (two-piece exterior type). This distance in the front-rear direction can be, for example, about 40 to 60% of the total length Y. In the illustrated example, the lower edges of the front exterior body 12F and the rear exterior body 12B are linear along the width direction WD, but the lower edge of at least one of the front exterior body 12F and the rear exterior body 12B is along the leg circumference. It may be curved like this.

In a pant-type disposable diaper with a two-part exterior, the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B, so that the liquid-impermeable sheet 11 is not exposed on the back surface of the interior body 200. It is preferable that the back surface of the interior body 200 is provided with a cover nonwoven fabric 13 extending from between the front exterior body 12F and the interior body 200 to between the rear exterior body 12B and the interior body 200. The inner and outer surfaces of the cover nonwoven fabric 13 can be adhered to opposing surfaces, respectively, via a hot melt adhesive. The nonwoven fabric used for the cover nonwoven fabric 13 can be appropriately selected from, for example, the same material as the material of the exterior bodies 12F and 12B.

The exterior bodies 12F, 12B have a waist circumference portion that corresponds to the waist circumference region T and corresponds to a front-back direction range. In addition, in the example shown in FIGS. 1 and 2, as shown in FIG. 7, the dimensions in the front and rear direction LD of the front exterior body 12F and the rear exterior body 12B are equal, and the front exterior body 12F and the rear exterior body 12B are in the intermediate region L. Although it does not have a corresponding part, as shown in FIG. 8, the longitudinal dimension of the rear exterior body 12B is longer than the front exterior body 12F, and the front exterior body 12F does not have a part corresponding to the intermediate region L. However, the rear exterior body 12B may have a buttock cover portion C extending from the waist region T toward the intermediate region L side. Although not shown, the front exterior body 12F may also be provided with a groin cover portion extending from the waist region T toward the intermediate region L side.

As shown in FIGS. 4 and 5, the exterior bodies 12F and 12B include an inner sheet layer 12H, an outer sheet layer 12S, and elastic members 15 to 19 provided between them. Each sheet layer may be made of a common sheet material or may be made of individual sheet materials. That is, in the former case, in part or all of the exterior body, the inner and outer parts of a single sheet material that is folded back at appropriate positions such as the edge of the waist opening WO or the edge of the leg opening LO side. Elastic members 15-19 can be provided between them. In the illustrated example, the waist portion W has a portion including a folded back portion of the sheet material. For example, in the waist region W, the sheet material forming the outer sheet layer 12S extends only to the edge of the waist opening WO, but the sheet material forming the inner sheet layer 12H is similar to the sheet material forming the second sheet layer. It wraps around the waist edge of the material and is folded back inside. Further, this folded portion 12r serves as an interior cover layer that extends over the entire width direction of the exterior bodies 12F, 12B to a position overlapping with the end of the interior body 200 on the side of the waist opening WO. The interior cover layer may be formed by pasting a dedicated sheet material instead of folding back the sheet material forming the inner sheet layer 12H.

In order to improve the fit around the wearer's waist, the exterior bodies 12F and 12B incorporate elastic members 15 to 19, and an elastic region A2 is formed that elastically expands and contracts in the width direction WD as the elastic members expand and contract. ing. In this elastic region A2, the exterior bodies 12F and 12B contract with the contraction of the elastic member in their natural length state, forming wrinkles or folds, and when the elastic member is stretched in the longitudinal direction, they are completely stretched without wrinkles. Expansion is possible up to a predetermined expansion rate. As the elastic members 15 to 19, in addition to elongated elastic members such as rubber thread (as shown in the drawings), known elastic members such as band-shaped, net-shaped, and film-shaped elastic members can be used without particular limitation. The elastic members 15 to 19 may be made of synthetic rubber or natural rubber.

To explain the elastic members 15 to 19 in the illustrated example in more detail, a plurality of waist elastic members 17 are arranged at intervals in the front-back direction in the waist portions W of the exterior bodies 12F and 12B so as to be continuous over the entire width direction WD. It is installed with a blank space. Also, one or more of the waist elastic members 17 disposed in the region adjacent to the lower waist portion U may overlap with the interior body 200, or the widthwise central portion that overlaps with the interior body 200. may be provided on both sides of the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber; in the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1.0 mm). It is preferable to provide about ² to 15, especially about 4 to 10 rubber threads at intervals of 2 to 12 mm, particularly 3 to 7 mm, and this will increase the elongation of the waist portion W in the width direction WD. The ratio is preferably about 150 to 400%, particularly about 220 to 320%. Furthermore, it is not necessary to use the waist elastic member 17 of the same thickness or the same elongation rate in the entire front-rear direction LD of the waist part W; for example, the waist elastic member 17 does not need to have a thicker The sheath elongation rates may be different.

Further, it is preferable that a plurality of waist lower elastic members 15, 19 made of elongated elastic members are attached to the waist lower part U of the exterior bodies 12F, 12B at intervals in the front-rear direction. The lower waist elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 1 It is preferable to provide about 5 to 30 rubber threads of 1 to 15 mm, especially 3 to 8 mm ^, and the elongation rate of the lower waist part U in the width direction WD is 200 to 350%. In particular, it is preferably about 240 to 300%.

When the elastic members 15, 16, 19 are provided in the front-rear direction range including the absorbent body 56, as in the lower waist portion U in the illustrated example, contraction of the absorbent body 56 in the width direction WD is prevented in part or all of the elastic members 15, 16, and 19. In order to ) is preferably set as a non-stretchable area A1, and both sides in the width direction are set as stretchable areas A2. Of the elastic region A2, a portion located in the front-rear direction LD range having the side seal 12A becomes a waist lower elastic region A3.

Such stretchable region A2 and non-stretchable region A1 supply the elastic members 15 to 17, 19 between the inner sheet layer 12H and the outer sheet layer 12S, and the elastic members 15, 16, 19 are connected to the stretchable region A2. After fixing only the positioned portion with hot melt adhesive, in the region having the absorber 56, the elastic members 15, 16, 19 are cut at one point in the middle in the width direction by pressurizing and heating or cutting, or It can be constructed by cutting almost the entirety of the elastic members 15, 16, 19 into pieces by pressurizing and heating, or by cutting, and removing the elasticity in the non-stretchable area A1 while leaving the elasticity in the elastic area A2.

FIG. 21(a) shows a case where the elastic members 15, 16, and 19 are cut at one point in the middle in the width direction, and a pressure section 171 having a cutting protrusion 172 at one point in the circumferential direction is cut at the outer periphery. The elastic member 15 is formed between the inner sheet layer 12H and the outer sheet layer 12S by a seal roll 170 whose cutting convex portion 172 is heated to a desired temperature and an anvil roll 180 with a smooth surface placed opposite thereto. The object to be cut to which ~ 17, 19 are attached is sandwiched so that the inner sheet layer 12H faces the seal roll side, and the elastic members 15, 16, 19 is cut by applying pressure and heating. In a product that has been processed in this way, as shown in FIG. 12(a), there is only a cut remaining portion between the outer sheet layer 12S and the inner sheet layer 12H that continues from the elastic members 15, 16, and 19 in the elastic region A2. remains alone as the unnecessary elastic member 18 in a state contracted to its natural length, and a cutting trace 12x remains at the cutting position.

Further, FIG. 21(b) shows a case in which almost the entire elastic members 15, 16, and 19 are finely cut, and a pressing part 171 having a large number of cutting protrusions 173 is provided on the outer peripheral surface, and the cutting protrusions are Elastic members 15 to 17, 19 were attached between the inner sheet layer 12H and the outer sheet layer 12S by a seal roll 170 whose 172 was heated to a desired temperature and an anvil roll 180 with a smooth surface placed opposite thereto. The object to be cut is sandwiched so that the inner sheet layer 12H faces the seal roll side, and the elastic members 15, 16, 19 are pressurized and heated only at the portion sandwiched between the cutting convex portion 173 and the outer peripheral surface of the anvil roll 180. It is used for cutting. In a product subjected to such processing, as shown in FIG. 12(b), between the outer sheet layer 12S and the inner sheet layer 12H, there is a cut remaining portion continuous from the elastic members 15, 16, 19 in the elastic region A2, The cut pieces of the elastic members that are not continuous with the elastic members 15, 16, and 19 in both elastic regions A2 remain as unnecessary elastic members 18 in a state of being contracted to their natural length, and cutting marks 12x remain at the cutting positions. Become.

In addition, in these methods of cutting the elastic member, depending on the pressurizing conditions and heating conditions, some or all of the cutting traces 12x may be cut through at least one of the inner sheet layer 12H and the outer sheet layer 12S in the thickness direction. It may become a hole. The shape of the cutting hole is determined by the shape of the cutting protrusion, and in the illustrated example, it is slit-shaped. Moreover, instead of the seal roll of the example shown in FIG. 21, the elastic members 15, 16, 19 are cut together with the inner sheet layer 12H and the outer sheet layer 12S using a cutting roll having a large number of fine cutting blades on the outer peripheral surface. A cutting method is also known, and in this cutting method, a slit-shaped cutting hole is inevitably formed as the cutting trace 12x.

The sheet material for forming the inner sheet layer 12H and the outer sheet layer 12S is not particularly limited, but is preferably a nonwoven fabric. When using a nonwoven fabric, it is preferable that the basis weight per sheet is about 10 to 30 g/ ^m2 .

The elastic members 15 to 19 are fixed to the exterior bodies 12F and 12B with hot melt adhesive HM using various coating methods. It is preferable that the inner sheet layer 12H and the outer sheet layer 12S are joined with a hot melt adhesive HM for fixing the elastic members 15 to 19 at the portions having the elastic members 15 to 19, respectively. In the portions that do not have the adhesive, they may be bonded using a hot melt adhesive HM, or may be bonded by material welding such as heat sealing or ultrasonic sealing, or some or all of them may not be bonded. In the parts of the exterior bodies 12F and 12B in the illustrated example having the elastic members 15 to 19, hot melt adhesive HM is applied only to the outer circumferential surfaces of the elastic members 15 to 19 using a coating means such as a comb gun or a SureWrap nozzle, and the hot melt adhesive HM is applied between the sheet layers. By sandwiching the elastic members 15 to 19 between the sheets, only the hot melt adhesive HM applied to the outer peripheral surfaces of the elastic members 15 to 19 fixes the elastic members 15 to 19 to both sheet layers and fixes the two sheet layers together. The elastic members 15 to 19 may be fixed to both sheet layers only at both ends in the stretching direction in the stretchable region A2.

(Adhesive parts between interior body, front exterior body, and rear exterior body)
As shown in FIGS. 2, 15, and 16, the interior body 200 and the exterior bodies 12F, 12B are joined via hot melt adhesives H1, H2. The adhesive parts 21 and 22 (portions where the hot melt adhesives H1 and H2 are arranged) have a width spanning both sides of the overlapping area 20 (shaded area in FIGS. 7 and 8). It is preferable that it extends from the edge on the crotch side to the edge of the overlapping region 20 on the waist opening WO side.

In particular, each of the adhesive parts 21 and 22 is bonded via hot melt adhesive H1 (see FIGS. 5 and 22(b)) located at the edge on the crotch side and arranged in a continuous pattern in the width direction WD. The second region 22 is bonded to the first region 21 with a hot melt adhesive H2 disposed in an intermittent pattern in both the front-rear direction LD and the width direction WD over the entire area other than the first region 21. It is preferable that the basis weight of the hot melt adhesive in the first region 21 is greater than the basis weight of the hot melt adhesive in the second region 22. The adhesive parts 21 and 22 having the first region 21 and the second region 22 may be applied to the adhesive parts 21 and 22 of both the front exterior body 12F and the rear exterior body 12B, as shown in the illustrated example, It is also possible to apply only one of them and adopt other known configurations for the other.

In such adhesive parts 21 and 22, the hot melt adhesive H1 is arranged in a continuous pattern in the width direction WD and with a relatively high basis weight, limited to the parts where stronger adhesion is required, In the second region 22 other than this, the hot melt adhesive H2 is disposed in an intermittent pattern in both the front-rear direction LD and the width direction WD, as in the past, and with a relatively low basis weight, so that the adhesive portion 21 , 22 as a whole can be suppressed from deteriorating in flexibility while improving the adhesive strength of the edge on the crotch side.

As shown in FIG. 22(b), the first region 21 can be formed by, for example, applying the hot melt adhesive H1 in a solid manner, bead application, curtain (slot) application, etc. along the width direction WD. . The second area 22 is formed by spraying the hot melt adhesive H2 from a nozzle onto a target surface moving in a certain direction to form a regular linear shape such as a spiral shape or a Z-shape, or two orthogonal directions (back and forth direction LD, width direction It can be formed by applying the coating in irregularly continuous lines or the like on the WD). In the case of a coating method using such a nozzle, the second region 22 can be provided with a plurality of rows of spiral-shaped coating regions that are continuous in the front-rear direction LD and adjacent to each other in the width direction WD (see FIG. b)).

The application amount of the hot melt adhesive in the first area 21 and the hot melt adhesive in the second area 22 can be determined as appropriate, but normally, the basis weight of the hot melt adhesive in the second area 22 is 3 to 20 g. /m ² (more preferably 3 to 7 g/m ² ), and the basis weight of the hot melt adhesive in the first region 2 1 is 1.5 to 10 times (more preferably 1.5 to 10 times) the basis weight of the second hot melt adhesive H 2 . (preferably 2 to 5 times), the hot melt adhesive not only suppresses a decrease in the flexibility of the adhesive parts 21 and 22 as a whole and improves the adhesive strength of the crotch side edge in the overlapping region 20, but also allows the hot melt adhesive to It is also preferable in that it is difficult to seep through the bodies 12F and 12B.

In particular, as shown in FIGS. 4, 12, and 21, when cutting an elastic member, a cutting hole may be formed as a cutting trace 12x at a position where the elastic member passes. Therefore, if a cut hole is provided in a portion where a relatively large amount of hot melt adhesive H1 overlaps with the first region 21 which is continuously arranged in the width direction WD, the hot melt adhesive H1 will pass through the cut hole to the outer surface. There is a risk that the hot melt adhesive H1 may ooze out or touch the hot melt adhesive H1 through the cut hole when the outer surface of the exterior bodies 12F, 12B is touched with a hand, giving the user an undesirable sticky feel. Therefore, when a cut hole is formed, as shown in FIGS. 17 and 18, the cut hole is not formed in a portion that overlaps with the first region 21, and the amount of hot melt adhesive H2 used is smaller, and the pattern is also intermittent. It is also preferable that it be formed in a portion overlapping with the second region 22 which is the target.

The dimension of the first region 21 in the front-rear direction LD can be determined as appropriate, but is preferably about 5 to 20 mm.

The first region 21 and the second region 22 (hot melt adhesives H1, H2) are preferably arranged close to the edge of the overlapping region 20. Specifically, the interval 21y in the front-rear direction LD between the edge E1 on the groin side of the overlapping region 20 and the edge on the groin side of the first region 21 is preferably 0 to 10 mm (more preferably 1 to 5 mm); The distance 21x in the width direction WD between the side edge E2 of the region 20 and the side edge of the first region 21 is preferably 5 to 15 mm (more preferably 5 to 10 mm). Further, it is preferable that the interval 22y in the front-rear direction LD between the groin-side edge E1 of the overlapping region 20 and the groin-side edge of the second region 22 is 5 to 15 mm (more preferably 5 to 10 mm); It is preferable that the interval 22x in the width direction WD between the side edge and the side edge E2 of the second region 22 is 0 to 10 mm (more preferably 1 to 5 mm). In this way, by arranging the first region 21 and the second region 22 (hot melt adhesives H1, H2) close to the edges of the overlapping region 20, it is possible to prevent the non-adhesive edges from fluttering and deteriorating the appearance and wearing comfort. be able to. Such an arrangement can be manufactured by a manufacturing method described below.

The second region 22 is a region other than the first region among the adhesive parts 21 and 22, and may have a portion that wraps around both sides of the first region 21 in the width direction WD as shown in the example, or 17 and 18, it may be located only on the waist opening WO side of the first region 21 in the front-rear direction LD. The former arrangement can be formed by applying the hot melt adhesive H2 forming the second region 22 so as to overlap the waist opening WO side of the first region 21. In this case, the portion where the hot melt adhesives H1 and H2 overlap remains the first region 21 because the hot melt adhesive is continuous in the width direction WD. As long as the first region 21 and the second region 22 are adjacent to each other in the front-rear direction LD, they may be separated by some distance (for example, about 1 to 15 mm) as shown in FIGS. Preferably.

Further, as can be seen from the above description, "the adhesive parts 21 and 22 have a width spanning both sides of the overlap area 20, from the edge of the overlap area 20 on the crotch side to the waist opening WO side of the overlap area 20. "Extending to the edge" means that the shape of the adhesive parts 21 and 22 may not only be a perfect rectangle, but also a slight shape of about 1 to 20 mm in the front and rear direction LD x 1 to 20 mm in the width direction at the four corners as shown in the example shown. This also includes cases where non-bonded parts (chips) remain and the shape is not a perfect rectangle.

(Production method)
19 and 20 show an example of a manufacturing method suitable for the above-mentioned pants-type disposable wearing article. That is, this manufacturing method mainly includes an exterior continuum forming step 301, an interior continuum forming step 302, a first application step 303 of hot melt adhesive, a second application step 304, and an interior continuum cutting step. 305, an inner body bonding process 306, and a side sealing and cutting process 307. Below, they will be explained in order. In order to make the explanation easier to understand, some parts that are continuous during the manufacturing process are given the same reference numerals as the parts after cutting.

In the exterior continuum forming step 301, the part that will become the front exterior body 12F is repeatedly continuous, and the front continuum 120F whose continuous direction is the width direction WD of the front exterior body 12F, and the part that will be the rear exterior body 12B are repeatedly and consecutively and a rear continuous body 120B whose continuous direction is the width direction WD of the rear exterior body 12B is formed. For this method, any known method can be used without particular limitation. In the illustrated example, the outer sheet layer 12S and the inner sheet layer 12H, which are continuous in a band shape with a predetermined width, are transported along the continuous direction, and the inner sheet layer 12H is bonded onto one surface of the outer sheet layer 12S. At this time, the lower waist elastic members 15 and 19 are supplied in a stretched state along the MD direction and sandwiched between them, thereby forming the front continuous body 120F and the rear continuous body 120B. In the illustrated example, the waist elastic member 17 is attached after the adhesive process 306 of the interior body 200, but it can also be attached prior to the adhesive process 306 of the interior body 200.

The waist lower elastic members 15, 19 are fixed to the outer sheet layer 12S and the inner sheet layer 12H, for example, before the waist lower elastic members 15, 19 are sandwiched between the outer sheet layer 12S and the inner sheet layer 12H. A hot-melt adhesive is applied to the outer surfaces of the members 15 and 19, and the process can be performed using this adhesive. Further, before sandwiching the waist lower elastic members 15, 19 between the outer sheet layer 12S and the inner sheet layer 12H, a hot melt adhesive is applied to at least one of the outer sheet layer 12S and the inner sheet layer 12H. By sandwiching the waist lower elastic members 15, 19 between the waist lower elastic members 15, 19, it is also possible to fix the waist lower elastic members 15, 19 between the outer sheet layer 12S and the inner sheet layer 12H.

For bonding the outer sheet layer 12S and the inner sheet layer 12H, any known method can be used without particular limitation. In other words, this bonding can be performed by hot melt adhesive or by welding means such as heat sealing or ultrasonic welding, and the bonding pattern is not particularly limited and may be continuous in both the MD direction and the CD direction. However, in order to improve air permeability and flexibility, it is preferable to form a pattern in which they are joined intermittently in at least one of the MD direction and the CD direction.

The front continuous body 120F and the rear continuous body 120B thus formed are subjected to an elastic member cutting process 310 as necessary prior to the bonding process 306 of the inner body 200 described below. The details of this cutting process have been described above with reference to FIG. 21, so a detailed description will be omitted here.

Then, a first application step 303 of a hot melt adhesive is performed on the front continuous body 120F and the rear continuous body 120B formed as described above, prior to the bonding step 306 of the inner body 200, which will be described later. That is, in this first application step 303, while transporting the front continuous body 120F and the rear continuous body 120B along the continuous direction, the adhesive portions 21 of one or both of the front continuous body 120F and the rear continuous body 120B are conveyed. , 22, the first hot melt adhesive H1 is applied to the crotch side edge of the region.

On the other hand, in the interior continuum forming step 302, an interior continuum 201 is formed in which the portion that will become the interior body 200 is repeated and the continuous direction is the front-rear direction LD of the interior body 200. For this step, any known method can be used without particular limitation.

The interior continuous body 201 thus formed is subjected to a second coating process 304 prior to a bonding process 306 for the interior body 200, which will be described later. That is, in this second application step 304, while conveying the interior continuous body 201 along the continuous direction, the first hot coat is applied to the area of the interior continuous body 201 that will become one or both of the adhesive parts 21 and 22. A second hot melt adhesive H2 is applied to the entire area other than the application area of the melt adhesive H1.

Then, the interior continuous body 201 is cut at regular intervals in the MD direction in the interior continuous body cutting process 305, and individual interior bodies 200 with the second hot melt adhesive H2 applied to the back side are formed one after another, and are supplied to the interior body 200 bonding process 306.

Then, in the bonding step 306 of the inner body 200, the front continuous body 120F and the rear continuous body 120B are conveyed along the continuous direction parallel to each other and aligned with the bonding position with the inner body 200 in the MD direction. , the interior bodies 200 supplied from the interior continuum cutting step 305 are turned 90 degrees and overlapped at the adhesion positions of the interior bodies 200 of the front continuum 120F and the rear continuum 120B, and then the first hot melt adhesive H1 is applied. Then, an interior assembly is formed in which the front continuous body 120F and the rear continuous body 120B are joined to the interior body 200 via the second hot melt adhesive H2.

After this, in the illustrated example, the outer end of the front continuous body 120F in the CD direction and the outer end of the rear continuous body 120B in the CD direction are moved to the center side in the CD direction at positions that become the edges of the waist opening. It is folded back and joined to the opposing surface. Further, at this time, the waist elastic member 17 is supplied in a stretched state along the MD direction and is sandwiched between the folded portion 12r and the opposing surface. The fixing of the waist elastic member 17 and the joining of the folded portion 12r and the opposing surface can be the same as in the case of the lower waist elastic members 15 and 19. As described above, the waist elastic member 17 can be attached before the adhesion step 306 of the interior body 200.

Thereafter, in the side sealing and cutting step 307, the interior assembled body is folded in half in the CD direction so that the surfaces on the interior body 200 side overlap, and then the front continuous body 120F and the rear continuous body are folded at the parts that will be both sides of each article. Individual diapers DP can be obtained by joining the bodies 120B to form side seals 12A, and cutting the front continuous body 120F and the rear continuous body at the boundaries of the individual diapers. Formation of the side seals 12A and cutting at the boundaries of each diaper DP can be performed sequentially or simultaneously.

In this way, by applying the hot melt adhesive to form the adhesive parts 21 and 22 on both the exterior body 12F and 12B sides and the interior body 200 side, it is possible to apply the hot melt adhesive to both the groin side edge and both side edges. , can apply hot melt adhesives with higher precision. That is, when applying the hot melt adhesive to the front continuous body 120F and the rear continuous body 120B, the accuracy of the application position in the front-rear direction LD (CD direction) of the product is high. Therefore, regarding the hot melt adhesive placed in the first region 21, the front continuous body 120F and the rear continuous body 120B are conveyed along the continuous direction, and one or both of the adhesive parts 21, 22 are formed. By applying the first hot melt adhesive H1 to the edge of the region on the crotch side, the first hot melt adhesive H1 can be applied with high accuracy up to the vicinity of the edge of the overlapping region 20 on the crotch side. On the other hand, when applying the hot melt adhesive to the interior continuous body 201, the accuracy of the application position in the width direction WD (CD direction) of the product is high. Therefore, with regard to the hot melt adhesive disposed in the second region 22, while conveying the interior continuous body 201 along the continuous direction, the first hot melt adhesive is By applying the second hot melt adhesive H2 to the entire area other than the application area of the agent H1, it is possible to apply the second hot melt adhesive H2 with high precision to near both side edges of the overlapping area 20. . As a result, it is possible to bond with higher precision up to the crotch-side edge of the overlapping region 20 of the front exterior body 12F, the rear exterior body 12B, and the interior body 200, and to the vicinity of both side edges.

For example, by employing such a manufacturing method, the hot melt adhesive can be placed close to the edge of the overlapping region 20 as described below. As a result, it is possible to prevent the non-adhesive edges of the product from fluttering and deteriorating the appearance and wearing comfort.
- Distance in the CD direction between the crotch side edge of the area that will become the overlapping area 20 and the application position of the first hot melt adhesive H1: 0 to 10 mm (more preferably 1 to 5 mm)
- Distance in the MD direction between both ends in the MD direction of the region that will become the overlapping region 20 and both ends in the MD direction of the application position of the first hot melt adhesive H1: 5 to 15 mm (more preferably 5 to 10 mm)
- Distance in the front-rear direction LD between the crotch side edge of the area that will become the overlapping area 20 and the application position of the second hot melt adhesive H2: 5 to 15 mm (more preferably 5 to 10 mm)
- The distance in the MD direction between both ends in the MD direction of the area that will become the overlapping region 20 and both ends in the MD direction of the application position of the second hot melt adhesive H2 is 0 to 10 mm (more preferably 1 to 5 mm).

Moreover, according to the above-mentioned manufacturing method, in the front-rear direction LD of the diaper DP, the first hot melt adhesive H1 can be applied closer to the crotch than the second hot melt adhesive H2. In addition to or in place of this, in the width direction WD of the diaper DP, the second hot melt adhesive H2 can also be applied laterally than the first hot melt adhesive H1. Note that when both of these conditions are satisfied, slight non-bonded parts (chips) remain at the four corners of the bonded parts 21 and 22, as in the above-mentioned example of the pants-type disposable diaper.

As long as it is only necessary to enable higher accuracy of bonding up to the crotch side edge and both side edges of the overlapping region 20, the application patterns of the first hot melt adhesive H1 and the second hot melt adhesive H2 are not particularly limited, and for example, both adhesives H1, H2 can be continuously applied in one direction (MD) or two orthogonal directions (MD, CD) such as solid application, bead application, curtain (slot) application, etc., or conversely, can be intermittently applied in two orthogonal directions such as a spiral pattern as shown in Fig. 22(a). Of course, as shown in Fig. 22(b), the first hot melt adhesive H1 can be applied in a continuous pattern in the MD direction in the first application step 303, and the second hot melt adhesive H2 can be applied in an intermittent pattern in both the MD direction and the CD direction in the second application step 304, thereby manufacturing the above-mentioned example of a pants-type disposable diaper. In this case, the application amounts of the first hot melt adhesive H1 and the second hot melt adhesive H2 can be determined as appropriate, but if the basis weight of the second hot melt adhesive H2 is 3 to 20 g/ ^m2 (more preferably 3 to 7 g/ ^m2 ) and the basis weight of the first hot melt adhesive H1 is 1.5 to 10 times (more preferably 2 to 5 times) the basis weight of the second hot melt adhesive H2 , this is preferable not only because it suppresses a decrease in flexibility of the adhesive joints 21, 22 as a whole and improves the adhesive strength of the crotch side edges of the adhesive joints 21, 22 between the inner body 200 and the outer bodies 12F, 12B, but also because it makes the hot melt adhesives H1, H2 less likely to seep out through the outer bodies 12F, 12B.

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

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

The "front-rear direction" refers to the direction indicated by the symbol LD in the figure (longitudinal direction), and the "width direction" refers to the direction indicated by the symbol WD in the figure (left-right direction), with the front-rear direction and the width direction being perpendicular to each other.

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

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

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

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

・“Basic weight” is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%) to reach a constant weight. Pre-drying refers to making the sample or test piece constant weight in an environment at a temperature of 100°C. Note that fibers with an official moisture content of 0.0% do not need to be pre-dried. From the test piece that has reached a constant weight, use a sample sampling template (100 mm x 100 mm) to cut out a sample with dimensions of 100 mm x 100 mm. Measure the weight of the sample, multiply by 100 to calculate the weight per square meter, and use it as the basis weight.

- "Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 Handy Compression Measurement Program) under the conditions of load: 0.098 N/cm ² and pressurized area: 2 cm ² .

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

・Water absorption rate is the "time to end point" when JIS K7224-1996 "Water absorption rate test method for super absorbent resin" is performed using 2 g of super absorbent polymer and 50 g of physiological saline. .

・The term "deployed state" means a state in which the product is flattened without contraction (including any contraction such as contraction caused by an elastic member) or slack.

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

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

The present invention can be used for pants-type disposable wearable articles in general, such as pants-type disposable diapers as in the above example, as well as shorts-type sanitary napkins.

DESCRIPTION OF SYMBOLS 11...Liquid-impermeable sheet, 120B...Back continuous body, 120F...Front continuous body, 12A...Side seal, 12B...Rear exterior body, 12E...Waist extension part, 12F, 12B...Exterior body, 12F...Front exterior body , 12H...Inner sheet layer, 12S...Outer sheet layer, 13...Cover nonwoven fabric, 15, 19...Waist lower elastic member, 17...Waist elastic member, 18...Unnecessary elastic member, 20...Overlapping region, 200...Interior body, 201 ...Interior continuum, 21, 22...Adhesive part, 21...First region, 22...Second region, 30...Top sheet, 301...Exterior continuum forming step, 302...Interior continuum forming step, 303...First application Process, 304... Second coating process, 305... Interior continuum cutting process, 306... Adhesive process, 307... Side sealing and cutting process, 40... Intermediate sheet, 50... Absorbent element, 56... Absorber, 58... Packaging sheet, 60... Rising gathers, 60A... Tip side portion, 60B... Root side portion, 62... Gather sheet, 63... Gather elastic member, 67... Lodging portion, 68... Rising portion, 70... Side flap, 71... First sheet layer, 72...Second sheet layer, 73...Side elastic member, 74...Innermost sheet layer, 75...Outermost sheet layer, 76...Inner sheet layer, 77...Non-joint part, A1...Non-stretchable area, A2...Stretchable Area, A3... Lower waist elastic area, B... Back body, C... Buttock cover part, F... Front body, H1, H2... Hot melt adhesive, H1... First hot melt adhesive, H2... Second hot melt adhesive agent, HM...hot melt adhesive, L...middle area, LD...front-back direction, LO...leg opening, P1...first part, P2...second part, SG...side elastic area, T...torso circumference area, U... Lower waist part, W...waist part, WD...width direction, WO...waist opening.

Claims (4)

a front exterior body that constitutes at least the waist circumference of the front body;
a rear exterior body constituting at least the waist circumference of the rear body;
an interior body extending in the front-rear direction from the front exterior body to the rear exterior body;
an adhesive part where the interior body is joined to the front exterior body and the rear exterior body through a hot melt adhesive in an overlapping region where they overlap each other;
a side seal in which both sides of the front exterior body and both sides of the rear exterior body are respectively joined;
Equipped with a waist opening and a pair of left and right leg openings,
The front exterior body and the rear exterior body are separated in the front-rear direction,
The front exterior body and the rear exterior body have a non-stretchable region provided in the overlapping region, and stretchable regions provided on both sides of the non-stretchable region in the width direction,
The elastic region includes an inner sheet layer, an outer sheet layer, and a plurality of elongated elastic members attached along the width direction at intervals in the front-rear direction between the inner sheet layer and the outer sheet layer. has
The non-stretchable region includes the inner sheet layer and the outer sheet layer continuing from the stretchable region, the cut portion remaining between the inner sheet layer and the outer sheet layer and continuing from the elastic member of the stretchable region, and both. at least one cut piece of the elastic member that is not continuous with the elastic member in the elastic region, and a cut hole formed at a position where the elastic member passes through at least one of the inner sheet layer and the outer sheet layer,
One or both of the bonded portions between the interior body and the front exterior body and the bonded portions between the interior body and the rear exterior body have a width that spans both sides of the overlapped region, and a width that spans both sides of the overlapped region. A method for manufacturing a pants-type disposable wearing article extending from an edge on the crotch side to an edge on the waist opening side of the overlapping region, the method comprising:
A part of the front exterior body including the cut hole is repeatedly continuous, and a front continuous body whose continuous direction is the width direction of the front exterior body, and a part of the rear exterior body including the cut hole are repeatedly continuous. , and a rear continuous body whose continuous direction is the width direction of the rear exterior body;
an interior continuum forming step in which the interior continuum is formed in which the parts that will become the interior body are repeated and the continuous direction is in the front-rear direction of the interior body;
While conveying the front continuous body and the rear continuous body along the continuous direction, the edge on the crotch side of the region of the front continuous body and the rear continuous body that will become the adhesive part of one or both of them. a first application step of applying a first hot melt adhesive to the
While conveying the interior continuum along its continuous direction, the interior continuum is transported to a portion of the interior continuum that includes the entire area other than the area where the first hot melt adhesive is applied, of the area that will become one or both of the adhesive parts. , a second application step of applying a second hot melt adhesive;
an interior continuous body cutting step of cutting the interior continuous body at regular intervals in the MD direction to sequentially form the interior bodies;
While transporting the front continuous body and the rear continuous body along the continuous direction, parallel to each other and aligned with the adhesion position with the interior body in the MD direction, the inner body is placed over the front continuous body and the rear continuous body. The front continuous body and the rear continuous body are joined to the inner body through the first hot melt adhesive and the second hot melt adhesive , and the inner body is joined through the first hot melt adhesive. a bonding step of forming an interior assembly in which a first region bonded and a second region bonded via the second hot melt adhesive other than the first region are formed;
After folding the interior assembly in half in the CD direction, the front continuous body and the rear continuous body are joined at the portions that become both sides of each article, and the front continuous body and the rear continuous body are folded into individual articles. a side sealing and cutting step of cutting at the boundary of the
In the exterior continuum forming step, the cutting hole is not formed in a portion that will overlap with the first region, but the cutting hole is formed in a portion that will overlap with the second region,
A method for manufacturing a pants-type disposable wearing article, characterized by: In the first application step, a first hot melt adhesive is applied in a continuous pattern in the MD direction ,
In the second application step, a second hot melt adhesive is applied in an intermittent pattern in both the MD direction and the CD direction.
A method for manufacturing a pants-type disposable wearing article according to claim 1. The basis weight of the second hot melt adhesive is 3 to 20 g/m ² , and the basis weight of the first hot melt adhesive is 1.5 to 10 times that of the second hot melt adhesive.
A method for manufacturing a pants-type disposable wearing article according to claim 2. The distance in the CD direction between the edge of the crotch side of the one or both overlapping regions and the application position of the first hot melt adhesive is 0 to 10 mm,
The distance in the MD direction between both ends of the one or both overlapping regions in the MD direction and both ends of the application position of the first hot melt adhesive in the MD direction is 5 to 15 mm,
The distance in the front-rear direction between the edge of the crotch side of the one or both overlapping regions and the application position of the second hot melt adhesive is 5 to 15 mm,
The distance in the MD direction between both ends in the MD direction of the region serving as one or both overlapping regions and both ends in the MD direction of the application position of the second hot melt adhesive is 0 to 10 mm.
A method for producing a pants-type disposable wearing article according to any one of claims 1 to 3.

Images