JP7289215B2 - Trunks type disposable wearing article - Google Patents

Description

TECHNICAL FIELD The present invention relates to a trunks-type disposable wearing article through which legs can be easily passed when worn.

A pants-type disposable wearing article such as a pants-type disposable diaper has a waist opening and a pair of leg openings, and includes an outer body extending from the edge of the waist opening of the front body to the edge of the waist opening of the back body, and at least the crotch area of the outer body. A structure having an inner body including an absorbent body and side seal portions joining both sides of the outer body of the front body and both sides of the outer body of the back body is generally used.

Also known as a type of underpants-type disposable diaper is a trunk-type (also called a one-quarter length or boxer-type) disposable diaper having a pair of leg tube portions surrounding the base of the thigh. As a trunks-type disposable wearing article having a simple leg tube structure, the crotch part of the outer body has a pair of inner thigh parts extending to one side and the other side in the width direction from the circumscribed rectangle of the absorbent body. , the portion along the edge of the leg opening, including the inner thigh portion, is known to form a pair of leg tube portions surrounding the base side of the thigh (see Patent Documents 1 to 5, for example).

In such a trunks-type disposable wearing article, as with other types of underpants-type disposable diapers, various elastic members are fixed to the outer body in a stretched state in order to improve fit to the body. It is done. In particular, on both front and rear sides of the exterior body, from one side seal portion toward the center in the width direction along the edge of the leg opening, across the center in the width direction toward the other leg opening, and along the other leg opening The front leg elastic members and the rear leg elastic members, which are attached in a pattern extending to the side seal portions, are important because they influence the fit of the leg tube portions of the trunks-type disposable wearing article.

With such a front leg elastic member and a rear leg elastic member, there is an advantage that the fit of the tubular leg portion is excellent.

However, such a trunks-type disposable wearing article has a problem that when worn, the leg cylinders are narrowed and the lower end opening of the leg cylinders is far from the waist opening, so it is difficult to visually confirm the position where the legs are put through. had a point.

JP-A-2006-230920 JP 2007-061335 A JP 2010-82133 A JP 2010-227505 A Japanese Patent No. 5208965 Japanese Patent No. 4439150

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide a trunks-type disposable wearing article that can be easily put on through the legs.

The trunks-type disposable wearing article that solves the above problems is as follows.
<First Aspect>
an outer body having a waist opening and a pair of leg openings and extending from the edge of the waist opening of the front body to the edge of the waist opening of the back body; , and a side seal portion that joins both sides of the outer body of the front body and both sides of the outer body of the back body,
The crotch portion of the exterior body has a pair of inner thigh portions extending to one side and the other side in the width direction from the circumscribed rectangle of the absorbent body. The part along is a pair of leg cylinders surrounding the root side of the thigh,
The leg tube portion has a leg-surrounding elastic member extending along the edge of the leg opening,
In trunks type disposable wearing articles,
Between the side edge of the inner body and the side seal portion in the exterior body of the front body and the exterior body of the back body, from the leg opening side portion of the side seal portion toward the center side in the width direction has an obliquely contracted side shaping region extending so as to be located on the side of the waist opening as it increases,
A side shaping elastic member that expands and contracts in the diagonal direction is fixed to the side shaping region, and the side shaping region is contracted in the diagonal direction together with the side shaping elastic member and is expandable in the diagonal direction. is
A trunks-type disposable wearing article characterized by:

(Effect)
In this trunks-type disposable wearing article, the side-shaping regions are obliquely shrunk by the side-shaping elastic members, so in the natural length state, the leg tube portions are lifted toward the waist opening side toward the side seal portions. . Therefore, when wearing this trunks-type disposable wearing article, the wearer can easily visually confirm the leg openings, that is, the positions through which the legs are passed, when looking into the interior through the waist opening.

<Second Aspect>
The side-shaping elastic member is fixed to the side-shaping region via a hot-melt adhesive, and the fixation is not able to resist the tension of the side-shaping elastic member when it is stretched, so that it contracts. ing,
The trunks-type disposable wearing article of the first aspect.

(Effect)
The contraction direction of the side shaping regions does not always result in a good fit to the body surface. Therefore, it is preferable that the fixing of the side shaping elastic member is released by extending the side shaping elastic member together with the side shaping region when the side shaping elastic member is attached. In addition, when the side shaping elastic member is unfixed, when the side shaping region is first stretched to a certain elongation rate (for example, the elastic limit) from an unstretched contracted state, the tension at the time of extension of the side shaping elastic member As long as it can not be resisted and comes off, the side shaping elastic member that came off will be free and contracted to some extent (not only contracting to its natural length, but also contracting from the beginning, although it does not reach its natural length). Later, it is fixed to the side shaping area by the tackiness of the hot-melt adhesive again in its post-shrinkage state.

<Third Aspect>
The exterior body is a portion in which a plurality of sheet layers are laminated,
The plurality of sheet layers includes a first range defined as a range in the front-rear direction having the side shaping elastic member, a second range located closer to the leg opening side than the first range in the outer body of the front body, extending over a third range located closer to the leg opening side than the first range of the outer body of the back body, and a fourth range located closer to the waist opening side than the first range,
The side shaping elastic member extends from one side seal portion to the other side seal portion and has a pattern having a portion passing in the diagonal direction in a region between the inner body and the side seal portion. an elongated elastic member attached between the sheet layers;
An elastic member other than the side shaping elastic member and a hot melt adhesive other than the hot melt adhesive for fixing the side shaping elastic member are provided between the plurality of sheet layers in the first range. not
the leg-surrounding elastic member is fixed via a hot-melt adhesive between the plurality of sheet layers in the second range and the third range;
An elongated waist elastic member extending in the width direction is fixed via a hot-melt adhesive between the plurality of sheet layers at least in the waist portion in the fourth area,
The trunks-type disposable wearing article of the second aspect.

(Effect)
An elastic member is attached to almost the entire outer body of the trunks-type disposable wearing article to ensure fit. Above all, it goes without saying that the fitting properties of the waist portion and leg tube portions are extremely important. On the other hand, when the elastic member is attached to the exterior body, it is common to form the exterior body by laminating a plurality of sheet layers and fix the elongated elastic member between the sheet layers via a hot-melt adhesive. be. Here, when the elastic members positioned between the same sheet layers are adhered to the sheet layers via hot-melt adhesion, the hot-melt adhesive for fixing the respective elastic members must be present at the points where the different elastic members intersect. becomes. Therefore, for example, if the side shaping elastic member and another elastic member intersect, even if the side shaping elastic member is made easy to be detached by the hot-melt adhesive, the other elastic member does not cross the other elastic member. The side shaping elastic member is also fixed by the hot-melt adhesive for fixing. This may make it difficult for the side shaping elastic member to become unfixed. On the other hand, as in this aspect, by adopting an arrangement in which the front-rear direction range having the side shaping elastic member and the front-rear direction range having the waist elastic member and other elastic members do not overlap, general While maintaining the structure of the outer body and securing the fit of the waist and leg cylinders, the adhesive force of the hot melt adhesive for fixing the side shaping elastic members is reduced, and the side shaping elastic members are released. is possible, which is preferable.

<Fourth Aspect>
The crotch portion of the exterior body has a crotch shaping region contracted in the width direction,
A groin shaping elastic member that expands and contracts in the width direction is fixed to the groin shaping region, and the groin shaping region shrinks in the width direction together with the groin shaping elastic member and is expandable in the width direction.
A trunks-type disposable wearing article according to any one of aspects 1 to 3.

(Effect)
In this trunks-type disposable wearing article, since the crotch shaping area is contracted in the width direction by the crotch shaping elastic member, the width of the crotch is narrowed and the width of the leg opening is widened in the natural length state. Therefore, when wearing this trunks-type disposable wearing article, the wearer can easily visually confirm the leg openings, that is, the positions through which the legs are passed, when looking into the interior through the waist opening.

<Fifth Aspect>
The groin shaping elastic member is fixed to the groin shaping region via a hot-melt adhesive, and the fixation is not able to resist the tension when the groin shaping elastic member is stretched, so that it contracts. ing,
The trunks-type disposable wearing article of the fourth aspect.

(Effect)
Shrinkage of the crotch shaping area in the width direction does not necessarily result in a good fit to the body surface, and the absorbent material also shrinks in the width direction, which may lead to a decrease in wearing comfort and absorption performance. be. Therefore, it is preferable that the fixation of the groin shaping elastic member is released by stretching the groin shaping elastic member together with the groin shaping region when wearing. In addition, the fixation of the crotch shaping elastic member is released means the same as the fixation of the side shaping elastic member is released. In other words, when the crotch shaping elastic member is unfixed, when the crotch shaping region is first stretched from an unstretched contracted state to a certain elongation rate (for example, the elastic limit), the tension of the crotch shaping elastic member at the time of stretching is increased. As long as it can't be resisted and comes off, the crotch shaping elastic member that came off will be free, and it will shrink to some extent (not only shrinking to its natural length, but also shrinking from the beginning although it does not reach its natural length). Later, it is fixed to the groin shaping area by the stickiness of the hot-melt adhesive again in its contracted state.

<Sixth Aspect>
The exterior body is a portion in which a plurality of sheet layers are laminated,
The plurality of sheet layers includes a first range defined as a range in the front-rear direction having the side shaping elastic member, a second range located closer to the leg opening side than the first range in the outer body of the front body, extends over a third range located closer to the leg opening than the first range in the exterior body of the back body,
The leg-surrounding elastic member extends from one of the side seal portions toward the center in the width direction along the edge of the leg opening in the second range and the third range, crosses the center in the width direction, and extends to the other side. an elongated elastic member attached between the plurality of sheet layers in a pattern facing the leg opening and extending along the edge of the other leg opening to the other side seal portion;
Between the plurality of sheet layers on both front and rear sides of the crotch portion in the second range and the third range, an elongated lower waist portion extending in the width direction so as to intersect with the leg-surrounding elastic members The elastic member is fixed via a hot melt adhesive,
In the second range and the third range, between the lower waist elastic member of the front body and the lower waist elastic member of the back side, between the plurality of sheet layers, other than the leg circumference elastic member No hot-melt adhesive other than the hot-melt adhesive for fixing the elastic member and the leg-surrounding elastic member is provided,
Of the leg-surrounding elastic members, a portion located in the crotch portion between the lower waist elastic member of the front body and the lower waist elastic member of the rear side is the crotch shaping elastic member,
The crotch shaping elastic member is cut in at least one location in the width direction,
The trunks-type disposable wearing article of the fifth aspect.

(Effect)
As for the groin shaping elastic member, a dedicated elastic member can be attached to the outer body. It is preferable to leave it as a shaping elastic member. However, if the hot-melt adhesive for fixing the leg elastic members is made easy to remove in order to remove the fixation of the groin shaping elastic member, the fixation of the leg elastic member along the leg opening is also disengaged, and the leg tube is removed. The stretchability of the part may decrease or disappear. On the other hand, by cutting the groin shaping elastic member in at least one position in the width direction as in the present aspect, if the entire leg-surrounding elastic member including the groin shaping elastic member is unfixed, the groin shaping will not occur. The elastic member can contract toward the side seal portion. Here, if the leg elastic members and the lower waist elastic member are deliberately crossed on both front and rear sides of the leg openings, even if the entire leg elastic member including the groin shaping elastic member is unfixed, the leg elastic members will remain elastic. The parts of the member that intersect with the lower waist elastic member, that is, the parts that are positioned on both front and rear sides of the leg openings are fixed with a hot-melt adhesive for fixing the lower waist elastic member, and elasticity is maintained. .

ADVANTAGE OF THE INVENTION According to this invention, advantages, such as becoming a trunks type disposable wearing article which a leg can be easily passed through when wearing, are brought about.

Fig. 2 is a plan view (inner surface side) of the trunks-type disposable diaper in an unfolded state; Fig. 2 is a plan view (outer surface side) of the trunks-type disposable diaper in an unfolded state; It is a top view of an inner body. 4 is a cross-sectional view taken along line 4-4 of FIG. 1; FIG. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; 3 is a cross-sectional view taken along line 3-3 of FIG. 1; FIG. 1 is a front view of a trunks-type disposable diaper schematically showing (a) a state at the time of manufacture, (b) a product state of natural length, and (c) a worn state. FIG. FIG. 4 is a plan view showing a cut pattern of an elastic member; FIG. 4 is a plan view showing an adhesive application pattern; FIG. 3 is an enlarged plan view of a main portion of FIG. 2; FIG. 11 is an enlarged plan view of a main part of another example; FIG. 11 is an enlarged plan view of a main part of another example; Fig. 2 is a plan view (outer surface side) of the trunks-type disposable diaper in an unfolded state; FIG. 4 is a plan view showing an adhesive application pattern; Fig. 2 is a plan view (outer surface side) of the trunks-type disposable diaper in an unfolded state; Fig. 2 is a plan view (outer surface side) of the trunks-type disposable diaper in an unfolded state; Fig. 2 is an enlarged plan view of the essential parts of the trunks-type disposable diaper in an unfolded state;

Hereinafter, as an example of a trunks-type disposable wearing article, a trunks-type disposable diaper will be described in detail with reference to the accompanying drawings. Note that the dotted pattern portion in the drawing indicates a hot-melt adhesive as a bonding means for bonding the constituent members positioned on the front side and the back side thereof. The hot melt adhesive is applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). can be applied. Alternatively or additionally, at the fixing portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester-polyamide-based adhesives, and can be used without particular limitation. As a joining means for joining each constituent member, a means by material welding such as heat sealing or ultrasonic sealing can be used.

1 to 10 show trunks type disposable diapers. This trunks-type disposable diaper (hereinafter also simply referred to as a diaper) has a waist opening and a pair of leg openings, and has an outer body 20 extending from the edge of the waist opening of the front body F to the edge of the waist opening of the back body B, Side seals for joining the inner body 10 including the absorber 13 provided at least in the crotch part 28 of the outer body 20, both sides of the outer body 20 of the front body F and both sides of the outer body 20 of the back body B and a portion 21 . In addition, the crotch portion 28 of the exterior body 20 means a rectangle circumscribing the absorber 13 (an imaginary rectangle circumscribing the absorber 13 in a plan view of the unfolded state). are substantially equal to both side edges of the inner body 10), and have a pair of inner thigh portions 31 extending to one side and the other side in the width direction, and along the edge 29 of the leg opening including these inner thigh portions 31 A pair of leg cylinders 30 surround the base of the thigh. During manufacturing, after the inner body 10 is joined to the outer body 20 by a joining means such as a hot-melt adhesive, the inner body 10 and the outer body 20 are aligned in the front-rear direction ( A trunk type that is folded in the center (in the longitudinal direction) and both sides are joined together by heat welding or hot-melt adhesive to form side seal portions 21, thereby forming a waist opening and a pair of leg openings. Disposable diapers.

(inner body)
As shown in FIGS. 3 to 6, the inner body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of nonwoven fabric or the like and a liquid-impermeable sheet 12 made of polyethylene or the like. It has a structure and absorbs and retains the excreted fluid that has permeated the top sheet 11 . Although the planar shape of the interior body 10 is not particularly limited, it is generally rectangular as shown in the figure.

As the top sheet 11 that covers the front side of the absorbent body 13 and forms a skin-contacting surface, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. In the illustrated example, the top sheet 11 wraps around the side edges of the absorbent body 13 and extends to the back side of the absorbent body 13, but is not limited to this.

A liquid-impermeable plastic sheet such as polyethylene or polypropylene is used for the liquid-impermeable sheet 12 that covers the back side of the absorbent body 13. In recent years, a moisture-permeable sheet is preferably used in order to prevent stuffiness. The water-impermeable/moisture-permeable sheet is a microporous sheet obtained by, for example, forming a sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching the sheet in a uniaxial or biaxial direction. can be mentioned. In the illustrated example, the liquid-impermeable sheet 12 is folded back on both sides in the width direction of the absorbent body 13 together with the top sheet 11, but it is not limited to this.

The absorber 13 is a known one, for example, a pile of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric, which is optionally mixed or fixed with a superabsorbent polymer. can be used. The absorber 13 can be wrapped with a liquid-permeable and liquid-retaining wrapping sheet 14 such as crepe paper, if necessary, for shape and polymer retention.

The overall shape of the absorbent body 13 is formed in a substantially hourglass shape with a constricted portion 13N narrower in width than both front and rear sides in the front-rear direction range including the crotch portion 28, but may be formed in an appropriate shape such as a rectangular shape. can be done. The size of the constricted portion 13N can be determined as appropriate, but the length of the constricted portion 13N in the front-rear direction can be set to about 20 to 50% of the overall length Y of the diaper, and the width of the narrowest portion 13m is equal to the overall width of the absorbent body 13. can be about 40 to 60%. In the case where the inner body 10 has such a constricted portion 13N, if the planar shape of the inner body 10 is substantially rectangular, a portion of the inner body 10 corresponding to the constricted portion 13N of the absorbent body 13 is left without the absorbent body 13. part is formed.

As shown in FIGS. 1 and 3 to 5, it is preferable to have diffusion grooves 17 extending in the front-rear direction in the middle portion in the width direction of the absorbent body 13, because the diffusion of urine in the front-rear direction is improved. From the viewpoint of diffusibility of urine, it is preferable that the diffusion grooves extend in both front and rear directions beyond the intermediate region, which is the region between the edge of one leg opening and the edge of the other leg opening. Only one diffusion groove 17 may be provided at the center in the width direction, but two diffusion grooves 17 may be provided at intervals in the width direction. Although the diffusion groove 17 extends linearly in the illustrated example, it may extend in a curved shape.

The diffusion grooves 17 are preferably slits penetrating the absorbent body 13 in the thickness direction as shown in the figure, but may be recesses provided on at least one of the front and back sides of the absorbent body 13 that do not penetrate the absorbent body 13 in the thickness direction. . When forming the recesses in the absorber 13, the area where the recesses are formed can be formed by reducing the basis weight of the areas where the recesses are formed, or by compressing the areas where the recesses are formed by embossing.

The position of the diffusion groove formation region is not limited as long as it is provided in the middle portion in the width direction of the absorber 13, but the center in the width direction is usually desirable, and the width (width 17d of the diffusion groove in the case of one) is It is desirable to set it to 5 to 20% of the total width 13w of the body 13. Further, the length 17L of the diffusion groove 17 in the front-rear direction can be determined appropriately, and can be set to about 30 to 70% of the total length of the absorbent body 13, for example.

On both sides of the inner body 10, rise gathers BS that fit around the legs are formed. As shown in FIGS. 5 and 6, the rising gathers BS are composed of a fixing portion fixed to the side portion of the back surface of the inner body 10, and a front surface of the inner body 10 extending from the fixing portion to the side of the inner body 10. a main body portion extending to the sides of the main body portion, a fallen portion formed by fixing the front and rear end portions of the main body portion to the side portions of the surface of the inner body 10 in a fallen state, and the portion between the fallen portions being unfixed. The formed free portion is formed by a gather sheet 15 which is doubled by folding. As the gather sheet 15, a water-repellent nonwoven fabric coated with a silicone, paraffin metal, or alkylchromic chloride water repellent is preferably used.

Also, between the double gather sheets 15, an elongated gather elastic member 16 is disposed at the tip of the free portion or the like. The gather elastic member 16 is for forming a raised gather BS by erecting a free portion by elastic expansion and contraction, as indicated by a chain double-dashed line in FIG. 5 in the product state.

Materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester can be used for the gather elastic member 16 . Also, in order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the elongation rate is 150 to 350%, and the interval is 10.0 mm or less. As the gather elastic member 16, a tape-like member having a certain width can be used in addition to the filament-like one shown in the drawing.

(Exterior body)
As shown in FIG. 4, the exterior body 20 is provided with various elastic members 24 to 27 for imparting elasticity. It has a plurality of sheet layers, and elastic members 24 to 27 are sandwiched between these sheet layers. Each of the plurality of sheet layers can be formed of a single sheet material, or can be formed by folding a single sheet material. The exterior body 20 of the illustrated example has a two-layer structure consisting of a first sheet 20A and a second sheet 20B. Various elastic members 24 to 27 are arranged between the sheets of the folded portion 20C, which are folded back, to impart stretchability. The first sheet 20A and the second sheet 20B can each be made of nonwoven fabric or the like.

The exterior body 20 has a substantially hourglass shape constricted in the middle in the front-rear direction LD, and both side edges of this constriction form the edges 29 of the leg openings. As described above, the crotch portion 28 of the outer body 20 has a pair of inner thigh portions 31 extending from the circumscribed rectangle of the absorbent body 13 to one side and the other side in the width direction WD. A portion along the edge 29 of the leg opening, including the thigh portion 31, forms a pair of leg tube portions 30 surrounding the base side of the thigh. The dimensions of the inner thigh portion 31 may be appropriately determined according to the length of the tubular leg portion 30, but in normal cases, the width 31x of the inner thigh portion 31 at the narrowest portion of the outer body 20 is equal to the total length of the diaper. About 1 to 5% of Y is preferable. In addition, as shown in FIG. 17, in the front body F, the width direction is set at an angle θ ₁ of 20 degrees with respect to the width direction from the virtual point P1 located on the edge 29 of the leg opening, which is located at the center of the width direction. When the imaginary straight line L1 extending outward and toward the waist side is drawn, it is preferable to have an intersection point P2 between the imaginary straight line L1 and the side edge of the exterior body 20 in the front-rear direction range having the side seal portions 21, and from this intersection point P2. A distance 30f in the front-rear direction to the edge 29 of the leg opening is preferably equal to or greater than the width 31x of the inner thigh portion 31 at the narrowest portion of the outer body 20, and preferably substantially the same. On the other hand, in the back body B, from the virtual point P1 located on the edge 29 of the leg opening at the center in the width direction to the width direction at an angle θ ₂ of 30 degrees, the virtual When the straight line L2 is drawn, it is preferable to have an intersection point P3 between the imaginary straight line L2 and the side edge of the exterior body 20 in the front-rear direction range having the side seal portion 21, and the distance from the intersection point P3 to the leg opening edge 29 is preferably The space 30b in the front-rear direction may be equal to or less than the width 31x of the inner thigh portion 31 at the narrowest portion of the outer body 20, or may be greater than or equal to the width 31x.

In the illustrated example of the outer body 20, in each of the front body F and the back body B, the waist elastic member 24 is arranged in the vicinity of the waist opening 23 along the width direction WD, and the waist elastic member 24 is arranged on the leg opening side in the width direction. A waist lower elastic member 25 arranged along the WD, and from one side seal portion 21 toward the center of the width direction WD along the edge 29 of the leg opening, crossing the center of the width direction WD toward the other leg opening , a plurality of front leg-surrounding elastic members 27 arranged at intervals without intersecting each other and extending in a curving pattern to the other side seal portion 21 along the edge 29 of the other leg opening; A leg elastic member 26 is provided. These elastic members 24 to 27 are each fixed in a state of being stretched at a predetermined elongation rate along the extending direction thereof, and are stretched together with the exterior body 20 between the stretched state when fixed and the natural length state. It has become. Instead of or together with the front leg elastic members 27 and the rear leg elastic members 26, the side seal portions 21 of the front body F and the side seal portions 21 of the back body B are continuous along the edge 29 of the leg opening. Alternatively, leg-surrounding elastic members may be provided.

The waist elastic member 24 is a plurality of thread rubbers or the like arranged at intervals in the vertical direction near the waist opening 23 in the front-back direction range of the side seal portion 21 where the front body F and the back body B are joined. for tightening and fitting the diaper near the waist opening 23 of the diaper. Although a plurality of thread rubbers are used as the waist elastic member 24 in the illustrated example, a tape-like elastic member may be used instead. Further, the waist elastic member 24 in the illustrated example is sandwiched between the non-woven fabrics of the folded portion 20C of the second sheet 20B in the waist portion, but it may be sandwiched between the first sheet 20A and the second sheet 20B. .

The lower waist elastic member 25 is an elongated shape such as a plurality of thread rubbers arranged at intervals in the vertical direction in the range in the front-rear direction having the side seal portions 21 on the leg opening side of the waist elastic member 24 . It is an elastic member, and is for tightening and fitting almost the entire area around the waist of the diaper except for the vicinity of the waist opening 23 . The boundary between the waist elastic member 24 and the lower waist elastic member 25 is located at a position where the elastic characteristics such as the thickness and elongation rate of the elastic member change, or at the waist of the inner body 10 when the elastic characteristics do not change. located on the side edges. The lower waist elastic member 25 is desirably not provided in the crotch portion 28 as in the illustrated example, and may be provided in both the front and rear sides of the intermediate region 22 as in the illustrated example, but it is not necessary.

In the outer body 20 of the back body B, the rear leg elastic members 26 arranged separately from the waist lower elastic member 25 are elongated elastic members such as thread rubber. It is arranged along a predetermined curve passing through the tubular leg portion 30 of the body B. The number of rear leg elastic members 26 may be one, but it is preferable that there be a plurality of them. Spaced apart without crossing. The rear leg-surrounding elastic members 26 are not arranged substantially as a bundle with close intervals between the elastic members, but are arranged so as to form a predetermined elastic zone including the leg tube portion 30 of the back body B. Three or more, preferably four or more, are arranged at intervals of 3 to 20 mm, preferably 6 to 16 mm.

In the outer body 20 of the front body F, the front leg-surrounding elastic members 27 arranged separately from the waist lower elastic member 25 are elongated elastic members such as thread rubber. are arranged along a predetermined curve passing through the leg tube portion 30 of the . The number of the front leg elastic members 27 may be one, but it is preferable that there be a plurality of them. spaced apart without The group of elastic members 27 around the front legs is also not arranged substantially as a bundle with close intervals, but three elastic members so as to form a predetermined elastic zone including the tubular leg portion 30 of the front body F. Three or more, preferably four or more, are arranged at intervals of up to 20 mm, preferably about 6 to 16 mm. The number of the front leg elastic members 27 is preferably the same as the number of the rear leg elastic members 26, but the number may be different if necessary.

The front leg elastic members 27 and the rear leg elastic members 26 may not be entirely curved, and may partially have linear portions.

As a method for attaching the front leg elastic members 27 and the rear leg elastic members 26, for example, techniques disclosed in Japanese Patent Application Laid-Open No. 4-28363 and Japanese Patent Application Laid-Open No. 11-332913 can be employed.

As shown in FIG. 10, the front leg elastic members 27 and the rear leg elastic members 26 are arranged on both sides in the width direction of the intermediate region 22 between the edge 29 of one leg opening and the edge 29 of the other leg opening. It is preferable that a part of the front leg elastic members 27 and a part of the rear leg elastic members 26 are attached in a crossing pattern. As a result, the front leg elastic members 27 and the rear leg elastic members 26 intersect and are substantially continuous along the leg openings, and elasticity is added to the leg tube portion 30 in the entire circumferential direction. The front leg elastic members 27 and the rear leg elastic members 26 intersect each other as shown in FIG. A structure in which the peripheral elastic members 26 intersect may be adopted.

The distance between the edge 29 of the leg opening and the elastic member closest to the edge 29 of the leg opening may be appropriately determined. Normally, the front leg elastic member 27 and the rear leg elastic member 26 are the distance between the edge 29 of the leg opening and the elastic member closest to the edge 29 of the leg opening in the direction orthogonal to the tangential line of the edge 29 of the leg opening. It is preferable that the length 29e is 10 mm or more, and it is particularly preferable that the crotch portion 28 is 10 to 50 mm.

As shown in FIG. 8, the lower waist elastic member 25, the front leg elastic members 27, and the rear leg elastic members 26 are continuously fixed to the exterior body 20 during manufacturing, and then overlap the interior body joints 18. A part or all of the portion is finely cut by a predetermined cutting pattern CP to form a non-stretchable non-stretchable region 19 (that is, a portion overlapping the cutting pattern CP in FIG. 8), and extends laterally from the non-stretchable region 19. The stretchable area is a stretchable region (that is, the portion where the lower waist elastic member 25, the front leg elastic member 27, and the rear leg elastic member 26 are continuously left on the side of the cutting pattern CP in FIG. 8). good too. In this case, the lower waist elastic member 25, the front leg elastic member 27, and the rear leg elastic member 26 are continuous from the side seal portion 21 on one side across the interior body 10 to the side seal portion 21 on the other (opposite) side. , part or all of the portion that overlaps with the inner body joint portion 18 is finely cut. Thereby, unnecessary shrinkage in the width direction of the inner body 10 (especially the absorbent body 13) can be prevented.

When the absorber 13 has the diffusion grooves 17, as shown in FIGS. 10 to 12, at least one of the front leg elastic members 27 and the rear leg elastic members 26 extends from the side seal portions 21 on both sides in the width direction WD. It is also preferable that the portion overlapping the diffusion groove 17 is cut off, and the portion overlapping the diffusion groove 17 of the outer package 20 is the non-stretchable region 19 . In particular, as in the example shown in FIG. 11 , at least one of the front leg elastic member 27 and the rear leg elastic member 26 has an edge on the diffusion groove 17 side in the region between the side edge of the absorber 13 and the diffusion groove 17 . It is more preferable that the portion overlapping the diffusion groove 17 is cut, and the portion overlapping the diffusion groove 17 in the exterior body 20 is a non-stretchable region 19 . At the crotch portion 28, the absorbent body 13 is sandwiched between the legs and reduced in width, but at least one of the front leg elastic member 27 and the rear leg elastic member 26 extends to the side of the absorbent body 13 and forms a diffusion groove. If the portion overlapping with 17 is cut off, the contractile force of the elastic member acts to widen diffusion groove 17 on both sides in the width direction, preventing collapse of diffusion groove 17 .

As a method for forming the non-stretchable regions by cutting the elastic members 24 to 27, for example, techniques described in JP-A-2002-35029, JP-A-2002-178428 and JP-A-2002-273808 can be employed. can. Of course, the lower waist elastic member 25, the front leg elastic member 27, and the rear leg elastic member 26 can be arranged continuously across the interior body 10 without being cut.

The elastic members 24 to 27 can be appropriately stretched when they are fixed. The circumference elastic member 27 and the rear leg circumference elastic member 26 can be about 230 to 350%.

The waist elastic member 24, the lower waist elastic member 25, and the leg elastic members 26, 27 are sandwiched between the folded portions 20C of the second sheet and between the first sheet 20A and the second sheet 20B and It is adhesively fixed to 20A and 20B with a hot-melt adhesive. The application pattern of the hot-melt adhesive can be determined as appropriate, but as shown in FIG. It is preferable to apply only to the part and its vicinity, and the part where the lower waist elastic member 25 is arranged and its vicinity. FIG. 9 shows the hot-melt adhesive B1 applied in the manufacturing process. , is applied only to the positions where the elastic members 24 and 25 are arranged and the vicinity thereof. Such application of the adhesive can be achieved by sandwiching the waist elastic member 24 and the lower waist elastic member 25 whose outer peripheral surfaces are coated with the adhesive between the sheets 20A and 20B.

On the other hand, the hot melt adhesive B2 for fixing the leg elastic members 26, 27 to the first sheet 20A and the second sheet 20B is, for example, as shown in FIG. In addition to applying continuously in the width direction over the entire range, it is also possible to apply stepwise along the leg-surrounding elastic members 26 and 27 (not shown).

(Front and rear cover sheets)
As shown in FIGS. 1 and 4, front and rear cover sheets are provided to cover the front and rear ends of the inner body 10 mounted on the inner surface of the outer body 20 and to prevent leakage from the front and rear edges of the inner body 10. 50, 60 may be provided. To explain the illustrated example in more detail, the front cover sheet 50 extends over the entire width direction from the inner surface of the folded portion 20C of the inner surface of the front body F to a position overlapping the front end portion of the inner body 10, and the rear cover sheet. 60 extends over the entire width direction from the inner surface of the folded portion 20C of the inner surface of the back body B to a position overlapping the rear end portion of the inner body 10 . Attaching the front and rear cover sheets 50 and 60 separately as shown in the figure has the advantage of increasing the degree of freedom in material selection, but also has the disadvantage of increasing the number of materials and manufacturing processes. Therefore, the folded portion 20C can be extended to a portion overlapping the inner body 10 to form a portion equivalent to the cover sheets 50 and 60 described above.

(inner body joint)
The interior body joint portion 18, which is the joint region between the exterior body 20 and the interior body 10, may be provided, for example, in a rectangular shape over substantially the entire interior body 10. However, as shown in FIGS. 22, it is preferable to provide only on the center side in the width direction WD of the crossing position C1 of the front leg elastic members 27 and the rear leg elastic members 26 on both sides in the width direction WD. In this case, since the front leg elastic members 27 and the rear leg elastic members 26 do not expand and contract together with the interior body 10 in the intermediate region 22, the front leg elastic members 27 and the rear leg elastic members 26 intersect to form the leg openings. Although it is substantially continuous along the edge 29, the fitting property does not deteriorate in the portion including the crossing position C1 of the front leg elastic member 27 and the rear leg elastic member 26. - 特許庁

The interior body joint portion 18 may be configured to be located only on the center side in the width direction WD of the crossing positions C1 of the front leg elastic members 27 and the rear leg elastic members 26 on both sides in the width direction WD over the entire front-rear direction. However, as in the illustrated example, it is preferable that both the front and rear sides of the intermediate region 22 extend to the outside of the crossing position C1 in the width direction WD.

The elastic regions formed by the front leg elastic members 27 and the rear leg elastic members 26 extend from the crossing positions C1 of the front leg elastic members 27 and the rear leg elastic members 26 on both sides in the width direction WD to the central side in the width direction WD. As a result, the absorber 13 shrinks in the width direction WD, resulting in poor wearing comfort. Therefore, as in the illustrated example, the front leg elastic members 27 and the rear leg elastic members 26 are crossed to maintain continuity, and the front leg elastic members 27 and the rear leg elastic members 26 on both sides in the width direction WD are aligned. It is preferable that the front leg elastic member 27 and the rear leg elastic member 26 are finely cut to have a non-stretchable region 19 on the center side in the width direction WD of the crossing position C1.

(Side shaping area)
As shown in FIGS. 1, 2, and 7, side seals are provided between the side edges of the inner body 10 and the side seal portions 21 in the outer body 20 of the front body F and the outer body 20 of the back body B. It is preferable to have obliquely shrunk side shaping regions 40 extending from the portion on the leg opening LO side of the portion 21 toward the center side in the width direction WD so as to be positioned on the waist opening WO side. The side shaping region 40 is a portion to which a side shaping elastic member 41 that expands and contracts in an oblique direction is fixed. When the side shaping region 40 is shrunk in the diagonal direction indicated by the white arrow by the side shaping elastic member 41, as shown in FIG. It will be in a state where the side is lifted toward the waist opening WO side. Therefore, when wearing this trunks-type disposable wearing article, when the wearer looks inside through the waist opening WO, the leg openings LO, that is, the positions through which the legs are passed can be easily visually confirmed. In addition, FIG. 7A shows a state in which the elastic limit is stretched in the width direction WD.

The position of the side shaping region 40 to which the side shaping elastic member 41 is fixed is not particularly limited as long as it is provided between the side edge of the inner body 10 and the side seal portion 21. For example, as shown in FIG. As shown in the illustrated example, it preferably extends obliquely from a corner portion adjacent to the portion where the side seal portion 21 and the leg tube portion 30 (portions having the leg-surrounding elastic members 26 and 27) intersect. In addition, the angle of the direction of expansion and contraction of the side shaping region 40 (the passing direction in the case of an elongated elastic member) can _be determined as appropriate. It is preferred to have a portion. In particular, the length 40L in the front-rear direction LD of the portion where the acute crossing angle θ ₃ between the expansion/contraction direction and the width direction WD of the side shaping region 40 is 30 degrees or more is the maximum length 40L in the front-rear direction LD of the leg tube portion 30. It is preferable that the side shaping regions 40 extend obliquely so as to be about 60 to 80% of the width. In addition, the length 40W of the width direction WD of the portion where the acute crossing angle θ ₃ between the expansion/contraction direction of the side shaping region 40 and the width direction WD is 30 degrees or more is the length 40W between the side edge of the inner body 10 and the side seal portion 21 . It is preferable that the side shaping regions 40 extend obliquely so as to be about 70 to 90% of the spacing SF.

The elongation rate when the side shaping region 40 is stretched to its elastic limit in the direction of expansion and contraction can be appropriately determined, but is preferably 200 to 250%, for example.

The side shaping elastic member 41 may be an elongated elastic member such as a thread-like or band-like elastic member, or may be a net-like or film-like elastic member. By attaching these elastic members to the side shaping regions 40 of the exterior body 20 while being stretched in the diagonal direction, the side shaping regions 40 expand and contract together with the side shaping elastic members 41 . For example, when the side shaping elastic member 41 is an elongated elastic member, as shown in the figure, from one side seal portion 21 to the other side seal portion 21, the inner body 10 and the side seal portion 21 In the region between can do. The application pattern of the hot-melt adhesive B2 for fixing the side shaping elastic members 41 can be determined as appropriate. In addition to applying continuously in the width direction WD over the entire range in the front-rear direction LD, it is also possible to apply in a stepped manner to a portion extending in an oblique direction (not shown).

As shown in FIG. 13, the side shaping elastic member 41 is continuously fixed to the exterior body 20 at the time of manufacture, and then part or all of the portion overlapping the interior body joint portion 18 is cut in a predetermined cutting pattern CP. may be finely cut to form a non-stretchable non-stretchable region 19 , and a portion extending laterally from the non-stretchable region 19 may be a stretchable region including the side shaping region 40 . Alternatively, as shown in FIG. 2, the side shaping elastic member may be continuous without such a cut.

The contraction direction of the side shaping regions 40 does not necessarily provide good fit to the body surface. Therefore, at the time of mounting, the side shaping elastic member 41 together with the side shaping region 40 is stretched to some extent, for example, to the same degree as the wearing state shown in FIG. 15 and 16, the fixing of the side-shaping elastic member 41 is not able to resist the tension when the side-shaping elastic member 41 is stretched, and the side-shaping elastic member 41 contracts. preferable. Such a structure reduces the application amount of the hot-melt adhesives B2 and B3 for fixing the side shaping elastic members 41, and additionally or instead of this, the type of the hot-melt adhesives B2 and B3 can be adjusted to the adhesive strength. It can be realized by changing to a weak one. Along with this, it is also preferable to set the elongation rate of the side shaping elastic member 41 higher than usual, for example, about 320 to 350%.

2, when the side shaping elastic member 41 and the waist lower elastic member 25 located between the same sheet layers intersect, as shown in FIG. Even if the adhesive with the melt adhesive B2 is made easy to come off, the side shaping elastic member 41 is also fixed at the intersection with the lower waist elastic member 25 by the hot melt adhesive B1 for fixing the lower waist elastic member 25. . This may make it difficult for the side shaping elastic member 41 to become unfixed. Therefore, the arrangement shown in FIGS. 13 and 14 is proposed in order to ensure that the side shaping elastic member 41 is unfixed.

That is, in the example shown in FIGS. 13 and 14, the range in the front-rear direction LD having the side shaping elastic member 41 is defined as the first range A1, and the leg opening LO is larger than the first range A1 in the outer body 20 of the front body F. The side is defined as a second range A2, the leg opening LO side is defined as a third range A3 from the first range A1 in the outer body 20 of the back body B, and the waist opening WO side is defined as a fourth range A3 from the first range A1. When the range is A4, there are elastic members other than the side shaping elastic members 41 and hot melt adhesives other than the hot melt adhesive B3 for fixing the side shaping elastic members 41 between the plurality of sheet layers in the first range A1. Melt adhesives B1 and B2 are not provided. Between the plurality of sheet layers in the second range A2 and the third range A3, the leg-surrounding elastic members 26, 27 are fixed via the hot-melt adhesive B2, and at least in the fourth range A4 An elongated waist elastic member 24 along the width direction WD is fixed between the plurality of sheet layers of the waist portion via a hot-melt adhesive B1.

In this way, the range in the front-rear direction LD having the side shaping elastic member 41 and the range in the front-rear direction LD having the waist elastic member 24 and the leg-surrounding elastic members 26 and 27 do not overlap. By cutting the member 41, only the hot-melt adhesive for fixing the side shaping elastic member 41 is used while ensuring the fit of the waist portion and the tubular leg portion 30 while maintaining the general structure of the exterior body 20. The adhesive strength is reduced, and the fixation of the side shaping elastic member 41 can be released.

If both ends of the side shaping elastic member 41 are fixed by a means other than the hot melt adhesive for fixing the side shaping elastic member 41, for example, the side seal portion 21, the side shaping elastic member 41 cannot be attached by hot melt adhesion. Can't unfasten. Therefore, as shown in FIG. 13 , a non-joint portion 21 c may be provided at the position where the side shaping elastic member 41 passes through the side seal portion 21 . Along with this or instead of this, the side shaping elastic member 41 may be cut at least at one point along its length. This cutting may be cutting for forming the aforementioned non-stretchable region 19, as in the illustrated example. In any case, by these methods, the side shaping elastic member 41, from which the hot-melt adhesive B3 is unfixed, shrinks from both longitudinal sides toward the center as shown in FIG. It can be contracted lengthwise from one side to the other as shown.

(groin shaping area)
As shown in FIGS. 2 and 7, etc., the trunks-type disposable diaper preferably has a crotch shaping region 45 contracted in the width direction WD in the crotch portion 28 of the outer body 20 . The groin shaping region 45 is a portion to which a groin shaping elastic member 46 that expands and contracts in the width direction WD is fixed, and is a portion that contracts in the width direction WD together with the groin shaping elastic member 46 and is extensible in the width direction WD. be. Since the crotch shaping region 45 is contracted in the width direction WD by the crotch shaping elastic member 46, in the state of the natural length, the crotch width is narrowed and the width of the leg opening LO is widened as shown in FIG. 7(b). state. Therefore, when wearing this trunks-type disposable wearing article, when the wearer looks inside through the waist opening WO, the leg openings LO, that is, the positions through which the legs are passed can be easily visually confirmed.

The position of the crotch shaping region 45 is not particularly limited as long as it is provided in the crotch portion 28 . In addition, the length of the width direction WD of the portion where the acute crossing angle θ ₄ between the stretching direction of the crotch shaping region 45 (the passing direction in the case of an elongated elastic member) and the width direction WD is 30 degrees or less (Fig. 10 It is preferable that the crotch shaping region 45 extends in the width direction so that the total sum when there are a plurality of them as in the example shown in FIG. .

The elongation rate when the crotch shaping region 45 is stretched to its elastic limit in the width direction can be appropriately determined, but is preferably 200 to 250%, for example.

The crotch shaping elastic member 46 may be an elongated elastic member such as a thread-like or band-like elastic member, or may be a net-like or film-like elastic member. By attaching these elastic members to the groin shaping region 45 of the outer body 20 while being stretched in the width direction WD, the groin shaping region 45 expands and contracts together with the groin shaping elastic members 46 . For example, as shown in the figure, the portion of the leg-surrounding elastic members 26 and 27 located at the crotch portion 28 serves as a crotch shaping elastic member 46 (usually, the portion that loses its stretchability by cutting or the like is replaced with a crotch shaping elastic member). It is preferable to leave it as the member 46), but a dedicated elastic member may be attached separately. Like the side shaping elastic member 41, the crotch shaping elastic member 46 is fixed between a plurality of sheet layers (the first sheet 20A and the second sheet 20B in the illustrated example) of the outer body 20 via a hot melt adhesive B2. can do.

As shown in FIGS. 8, 10, 11, etc., the crotch shaping elastic member 46 is continuously fixed to the outer body 20 during manufacturing, and then partially or wholly overlaps with the inner body joining portion 18. However, it may be finely cut with a predetermined cutting pattern CP to form a non-stretchable non-stretchable region 19 , and a portion extending laterally from the non-stretchable region 19 may be a stretchable region including the crotch shaping region 45 . Alternatively, the crotch shaping elastic member 46 may be continuous in the width direction WD as shown in FIG. 12 without such cutting.

The shrinking of the crotch shaping region 45 in the width direction WD does not necessarily result in a good fit to the body surface, and the absorbent body 13 also shrinks in the width direction WD, resulting in deterioration of wearing comfort and absorption performance. may lead to Therefore, when the groin shaping elastic member 46 is stretched along with the groin shaping region 45, the groin shaping elastic member 46 is fixed to a certain extent, for example, to the same extent as the wearing state shown in FIG. 7(c). It is preferable that the groin shaping elastic member 46 contract as shown in FIG. Such a structure reduces the application amount of the hot-melt adhesive B2 for fixing the crotch shaping elastic member 46 (the leg-surrounding elastic members 26, 27), and additionally or instead of the hot-melt adhesive B2. It can be realized by changing the type of adhesive to one with weak adhesive force. Of course, as in the example shown in FIG. 16, it is also preferable that only the fixation of the side shaping elastic member 41 is released and the fixation of the crotch shaping elastic member 46 is not released.

When part of the leg-surrounding elastic members 26, 27 is the crotch-shaping elastic member 46, a hot-melt adhesive for fixing the leg-surrounding elastic members 26, 27 is applied in order to release the fixation of the crotch-shaping elastic member 46. If B2 is easily detached, portions of the leg-surrounding elastic members 26 and 27 along the leg openings LO may also be unfixed, and the stretchability of the leg tube portion 30 may be reduced or lost. Therefore, the structures shown in FIGS. 13 to 15 are also proposed.

That is, in the example shown in the figure, the range in the front-rear direction LD having the side shaping elastic member 41 is defined as the first range A1, and the leg opening LO side is defined as the first range A1 in the outer body 20 of the front body F. 2 range A2, and the leg opening LO side of the outer body 20 of the back body B from the first range A1 is set to a third range A3, the leg circumference elasticity is set to the second range A2 and the third range A3. Members 26 and 27 are provided, and between the plurality of sheet layers on both front and rear sides of the crotch portion 28 in the second range A2 and the third range A3, along the width direction WD. An elongated lower waist elastic member 25 extending to intersect 27 is fixed via a hot melt adhesive B1. In addition, between the lower waist elastic member 25 of the front body F and the lower waist elastic member 25 of the rear side in the second range A2 and the third range A3, between the plurality of sheet layers, the leg circumference Elastic members other than the elastic members 26 and 27 and hot melt adhesives B1 and B3 other than the hot melt adhesive B2 for fixing the leg elastic members 26 and 27 are not provided. Of the leg-surrounding elastic members 26 and 27, the portion positioned in the crotch portion 28 between the waist lower elastic member 25 of the front body F and the waist lower elastic member 25 on the rear side becomes the crotch shaping elastic member 46. The crotch shaping elastic member 46 is cut at least at one point in the width direction WD. This cutting may be cutting for forming the aforementioned non-stretchable region 19, as in the illustrated example.

By cutting the groin shaping elastic member 46 in at least one place in the width direction WD in this way, when the fixing of the entire leg-surrounding elastic members 26 and 27 including the groin shaping elastic member 46 is released, the state shown in FIG. As shown, the crotch shaping elastic member 46 can contract toward the side seal portion 21 side. Here, if the leg elastic members 26, 27 and the lower waist elastic member 25 are crossed on both front and rear sides of the leg openings LO, the entire leg elastic members 26, 27 including the groin shaping elastic member 46 can be fixed. Even if the lower waist elastic members 26 and 27 come off, the portions of the leg elastic members 26 and 27 that intersect with the lower waist elastic member 25, that is, the portions located on both front and rear sides of the leg openings LO are hot-melt adhesives for fixing the lower waist elastic member 25. It is fixed with an adhesive and stretchability is maintained.

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

<Description of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
・"Front-back direction" means the direction (longitudinal direction) indicated by symbol LD in the figure, and "width direction" means the direction (left-right direction) indicated by WD in the figure. are orthogonal.
- "Front body" and "rear body" refer to the front and rear portions of the disposable diaper, respectively, with respect to the center in the front-rear direction.
・"Crotch part" means the part that is to be positioned between the crotch of the wearer, and normally, as shown in FIG. It means the range in the front-rear direction in which the acute crossing angle with the direction is 45° or less.
- "Curve" means not including a straight line.
- "Elongation rate" means a value when the natural length is taken as 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.
- "Matsuke" 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 a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.
・The "thickness" of the absorber is measured by Ozaki Seisakusho Co., Ltd.'s thickness measuring instrument (Peacock, dial thickness gauge large type, model JB (measuring range 0 to 35 mm) or model K-4 (measuring range 0 to 50 mm)). Measure by placing the sample and the thickness gauge horizontally.
• "Thickness" other than the above is automatically measured using an automatic thickness gauge (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N /cm ² and a pressurized area of 2 cm ² .
- "Unfolded state" means a flat unfolded state without contraction or slack.
・Unless otherwise specified, the dimensions and positional relationships of each part refer to the dimensions in the unfolded state, not in the natural length state.
・If there is no description about environmental conditions for testing and measurement, the test and measurement shall be performed in a laboratory or equipment under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%). do.

INDUSTRIAL APPLICABILITY The present invention can be used for trunks-type disposable wearing articles such as trunks-type disposable diapers and trunks-type sanitary products.

A1... first range, A2... second range, A3... third range, A4... fourth range, B... back body, BS... riser gathers, C1... intersection position, F... front body, LD... Front-back direction, LO... leg opening, WO... waist opening, 10... inner body, 11... top sheet, 12... liquid impermeable sheet, 13... absorbent body, 13 N... constricted portion, 14... wrapping sheet, 15... gathering sheet , 16... Gather elastic member, 17... Diffusion groove, 18... Interior body joint portion, 19... Non-stretchable region, 20... Exterior body, 20C... Folded portion, 21... Side seal portion, 22... Intermediate region, 24... Waist elasticity Members 26, 27 Leg-surrounding elastic member 26 Back-leg-surrounding elastic member 27 Front-leg-surrounding elastic member 28 Crotch portion 29 Edge of leg opening 31 Inner thigh portion 40 Side shaping region 41... Side shaping elastic member, 45... Groin shaping region, 46... Groin shaping elastic member, 30... Leg cylinder.

Claims (4)

an outer body having a waist opening and a pair of leg openings and extending from the edge of the waist opening of the front body to the edge of the waist opening of the back body; , and a side seal portion that joins both sides of the outer body of the front body and both sides of the outer body of the back body,
The crotch portion of the exterior body has a pair of inner thigh portions extending to one side and the other side in the width direction from the circumscribed rectangle of the absorbent body. The part along is a pair of leg cylinders surrounding the root side of the thigh,
The leg tube portion has a leg-surrounding elastic member extending along the edge of the leg opening,
In trunks type disposable wearing articles,
Between the side edge of the inner body and the side seal portion in the exterior body of the front body and the exterior body of the back body, from the leg opening side portion of the side seal portion toward the center side in the width direction has an obliquely contracted side shaping region extending so as to be located on the side of the waist opening as it increases,
A side shaping elastic member that expands and contracts in the diagonal direction is fixed to the side shaping region, and the side shaping region is contracted in the diagonal direction together with the side shaping elastic member and is expandable in the diagonal direction. and
The side-shaping elastic member is fixed to the side-shaping region via a hot-melt adhesive, and the fixation is not able to resist the tension of the side-shaping elastic member when it is stretched, so that it contracts. ing,
A trunks-type disposable wearing article characterized by: The exterior body is a portion in which a plurality of sheet layers are laminated,
The plurality of sheet layers includes a first range defined as a range in the front-rear direction having the side shaping elastic member, a second range located closer to the leg opening side than the first range in the outer body of the front body, extending over a third range located closer to the leg opening side than the first range of the outer body of the back body, and a fourth range located closer to the waist opening side than the first range,
The side shaping elastic member extends from one side seal portion to the other side seal portion and has a pattern having a portion passing in the diagonal direction in a region between the inner body and the side seal portion. an elongated elastic member attached between the sheet layers;
An elastic member other than the side shaping elastic member and a hot melt adhesive other than the hot melt adhesive for fixing the side shaping elastic member are provided between the plurality of sheet layers in the first range. not
the leg-surrounding elastic member is fixed via a hot-melt adhesive between the plurality of sheet layers in the second range and the third range;
An elongated waist elastic member extending in the width direction is fixed via a hot-melt adhesive between the plurality of sheet layers at least in the waist portion in the fourth area,
The trunks-type disposable wearing article according to claim 1 . an outer body having a waist opening and a pair of leg openings and extending from the edge of the waist opening of the front body to the edge of the waist opening of the back body; , and a side seal portion that joins both sides of the outer body of the front body and both sides of the outer body of the back body,
The crotch portion of the exterior body has a pair of inner thigh portions extending to one side and the other side in the width direction from the circumscribed rectangle of the absorbent body. The part along is a pair of leg cylinders surrounding the root side of the thigh,
The leg tube portion has a leg-surrounding elastic member extending along the edge of the leg opening,
In trunks type disposable wearing articles,
Between the side edge of the inner body and the side seal portion in the exterior body of the front body and the exterior body of the back body, from the leg opening side portion of the side seal portion toward the center side in the width direction has an obliquely contracted side shaping region extending so as to be located on the side of the waist opening as it increases,
A side shaping elastic member that expands and contracts in the diagonal direction is fixed to the side shaping region, and the side shaping region is contracted in the diagonal direction together with the side shaping elastic member and is expandable in the diagonal direction. and
The crotch portion of the exterior body has a crotch shaping region contracted in the width direction,
A groin shaping elastic member that expands and contracts in the width direction is fixed to the groin shaping region, and the groin shaping region shrinks in the width direction together with the groin shaping elastic member and is expandable in the width direction. ,
The groin shaping elastic member is fixed to the groin shaping region via a hot-melt adhesive, and the fixation is not able to resist the tension when the groin shaping elastic member is stretched, so that it contracts. ing,
A trunks-type disposable wearing article characterized by : The exterior body is a portion in which a plurality of sheet layers are laminated,
The plurality of sheet layers includes a first range defined as a range in the front-rear direction having the side shaping elastic member, a second range located closer to the leg opening side than the first range in the outer body of the front body, extends over a third range located closer to the leg opening than the first range in the exterior body of the back body,
The leg-surrounding elastic member extends from one of the side seal portions toward the center in the width direction along the edge of the leg opening in the second range and the third range, crosses the center in the width direction, and extends to the other side. an elongated elastic member attached between the plurality of sheet layers in a pattern facing the leg opening and extending along the edge of the other leg opening to the other side seal portion;
Between the plurality of sheet layers on both front and rear sides of the crotch portion in the second range and the third range, an elongated lower waist portion extending in the width direction so as to intersect with the leg-surrounding elastic member The elastic member is fixed via a hot melt adhesive,
In the second range and the third range, between the lower waist elastic member of the front body and the lower waist elastic member of the back side, between the plurality of sheet layers, other than the leg circumference elastic member No hot-melt adhesive other than the hot-melt adhesive for fixing the elastic member and the leg-surrounding elastic member is provided,
Of the leg-surrounding elastic members, a portion located in the crotch portion between the lower waist elastic member of the front body and the lower waist elastic member of the rear side is the crotch shaping elastic member,
The crotch shaping elastic member is cut in at least one location in the width direction,
The trunks-type disposable wearing article according to claim 3 .

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